/* roulang page: index */
/* ============================================================
   1. 设计变量
   ============================================================ */
:root{
  --ink-900:#050A12;
  --ink-800:#0A1421;
  --ink-700:rgba(16,30,49,.62);
  --brand:#17E1A0;
  --brand-deep:#0FB984;
  --brand-ink:#05130E;
  --accent:#FFB23F;
  --violet:#7C5CFF;
  --coral:#FF6B6B;
  --sky:#35C3FF;
  --line:rgba(120,180,255,.14);
  --txt:#E6EDF7;
  --txt-2:#93A4BE;
  --txt-3:#5C6B82;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-1:0 18px 40px rgba(0,0,0,.45);
  --sh-2:0 24px 56px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --maxw:1280px;
}

/* ============================================================
   2. base / reset
   ============================================================ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--txt);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-md)}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:#fff;font-weight:700;letter-spacing:-.02em}
h1{font-size:44px;line-height:1.25}
h2{font-size:26px;line-height:1.35}
h3{font-size:20px;line-height:1.5;font-weight:600}
h4{font-size:17px;line-height:1.5;font-weight:600}
p{margin:0}
button{font-family:inherit;border:0;background:none;color:inherit;cursor:pointer}
input{font-family:inherit}
::selection{background:rgba(23,225,160,.28);color:#fff}
.num{font-variant-numeric:tabular-nums}

/* ============================================================
   3. 容器与区块节奏
   ============================================================ */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap}
.section-head h2{position:relative;padding-left:18px}
.section-head h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:4px;background:linear-gradient(180deg,var(--brand),rgba(23,225,160,.15))}
.section-desc{margin-top:14px;color:var(--txt-2);font-size:15px;line-height:1.8;max-width:720px}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand);transition:gap 200ms var(--ease),opacity 200ms var(--ease)}
.text-link:hover{gap:13px;opacity:.85}

/* ============================================================
   4. 按钮
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;min-height:44px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;cursor:pointer;
  border:1px solid transparent;
  transition:transform 240ms var(--ease),box-shadow 240ms var(--ease),background 240ms var(--ease),border-color 240ms var(--ease),filter 240ms var(--ease);
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.btn-primary{
  background:linear-gradient(135deg,#17E1A0,#0FB984);
  color:var(--brand-ink);
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 26px rgba(23,225,160,.28);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(23,225,160,.6),0 0 34px rgba(23,225,160,.5);color:var(--brand-ink)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{
  background:rgba(16,30,49,.62);border-color:var(--line);color:#fff;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:rgba(23,225,160,.75);background:rgba(23,225,160,.12)}
.btn-ghost:active{transform:scale(.98)}
.btn-sm{padding:10px 16px;font-size:14px;min-height:40px}
.btn-block{width:100%}

/* ============================================================
   5. 徽章 / 标签
   ============================================================ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-sm);
  font-size:13px;font-weight:500;line-height:1.5;
  background:rgba(23,225,160,.14);color:#6FF2C6;
}
.badge-violet{background:rgba(124,92,255,.16);color:#B4A2FF}
.badge-coral{background:rgba(255,107,107,.16);color:#FFA3A3}
.badge-sky{background:rgba(53,195,255,.16);color:#8ADDff}
.badge-accent{background:rgba(255,178,63,.16);color:#FFC97A}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:var(--r-pill);
  font-size:13px;font-weight:500;color:#9EF3D4;
  background:rgba(23,225,160,.1);border:1px solid rgba(23,225,160,.28);
}

/* ============================================================
   6. 顶部导航
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  border-bottom:1px solid transparent;
  transition:background 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,10,18,.82);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
  box-shadow:0 14px 34px rgba(0,0,0,.42);
}
.header-inner{display:flex;align-items:center;gap:18px;height:78px;transition:height 220ms var(--ease)}
.site-header.is-stuck .header-inner{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,#17E1A0,#0FB984);color:var(--brand-ink);font-size:16px;
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 22px rgba(23,225,160,.25);
}
.brand-text{font-size:17px;font-weight:700;color:#fff;white-space:nowrap;letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px;flex:1}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:9px 12px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--txt-2);
  transition:color 200ms var(--ease),background 200ms var(--ease);
  white-space:nowrap;
}
.nav-link i{font-size:13px;opacity:.8}
.nav-link:hover{background:rgba(23,225,160,.09);color:#fff}
.nav-link.is-active{color:#fff}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 10px rgba(23,225,160,.9);
}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:rgba(16,30,49,.6);
  place-items:center;color:#fff;font-size:17px;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-cta{display:none}

/* ============================================================
   7. 首屏
   ============================================================ */
.hero{position:relative;padding:150px 0 96px;overflow:hidden;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-2;background-size:cover;background-position:center}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(5,10,18,.97) 0%,rgba(5,10,18,.86) 46%,rgba(5,10,18,.6) 100%),
             linear-gradient(180deg,rgba(5,10,18,.72) 0%,rgba(5,10,18,.96) 100%);
}
.hero-glow{
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(620px 440px at 12% 20%,rgba(23,225,160,.09),transparent 70%),
    radial-gradient(560px 400px at 78% 76%,rgba(255,178,63,.07),transparent 70%);
}
.hero-inner{display:grid;grid-template-columns:minmax(0,1fr) 348px;gap:52px;align-items:center}
.hero h1{font-size:clamp(28px,4vw,48px);margin-top:22px;letter-spacing:-.02em}
.hero-sub{margin-top:18px;font-size:18px;color:var(--txt-2);max-width:640px;line-height:1.8}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-badges{display:flex;flex-wrap:wrap;gap:24px;margin-top:34px}
.hero-badges li{display:inline-flex;align-items:center;gap:9px;font-size:14px;color:var(--txt-2)}
.hero-badges .dot{
  width:8px;height:8px;border-radius:50%;background:var(--brand);
  box-shadow:0 0 0 4px rgba(23,225,160,.14),0 0 12px rgba(23,225,160,.9);
}
.hero-card{
  padding:26px 24px;border-radius:var(--r-lg);
  background:var(--ink-700);border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--sh-1);
}
.hero-card-title{font-size:16px;font-weight:600;color:#fff;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:8px}
.quick-link{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 12px;border-radius:var(--r-md);margin-top:8px;
  font-size:15px;font-weight:600;color:var(--txt);
  background:rgba(5,10,18,.42);border:1px solid transparent;
  transition:all 220ms var(--ease);
}
.quick-link span{display:inline-flex;align-items:center;gap:10px}
.quick-link i:first-child{color:var(--brand)}
.quick-link:hover{border-color:rgba(23,225,160,.5);background:rgba(23,225,160,.1);transform:translateX(3px)}
.hero-card-note{margin-top:16px;font-size:13px;line-height:1.75;color:var(--txt-3)}

/* ============================================================
   8. 横滑轨道
   ============================================================ */
.rail-wrap{position:relative;margin-top:6px}
.rail{
  display:flex;gap:18px;overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding:6px max(24px,calc((100vw - var(--maxw)) / 2 + 24px)) 22px;
  scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none}
.rail-card{
  position:relative;flex:0 0 232px;aspect-ratio:3/4;
  border-radius:var(--r-lg);overflow:hidden;scroll-snap-align:start;
  box-shadow:var(--sh-1);
  transition:transform 240ms var(--ease),box-shadow 240ms var(--ease);
  background:linear-gradient(160deg,#10243c,#0A1421);
}
.rail-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 420ms var(--ease)}
.rail-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,18,.05) 30%,rgba(5,10,18,.92) 100%);
}
.rail-card:hover{transform:translateY(-6px);box-shadow:var(--sh-2)}
.rail-card:hover img{transform:scale(1.06)}
.rail-tag{
  position:absolute;left:14px;top:14px;z-index:2;
  padding:4px 10px;border-radius:var(--r-sm);font-size:13px;font-weight:500;
  background:rgba(255,178,63,.2);color:#FFC97A;backdrop-filter:blur(6px);
}
.rail-caption{position:absolute;left:16px;right:16px;bottom:16px;z-index:2;display:block}
.rail-caption strong{display:block;font-size:16px;font-weight:600;color:#fff;line-height:1.5}
.rail-caption em{display:block;margin-top:6px;font-style:normal;font-size:13px;color:var(--txt-2)}
.rail-arrow{
  position:absolute;top:38%;z-index:5;width:44px;height:44px;border-radius:50%;
  display:grid;place-items:center;color:#fff;
  background:rgba(10,20,33,.85);border:1px solid var(--line);
  backdrop-filter:blur(10px);
  transition:all 220ms var(--ease);
}
.rail-arrow:hover{border-color:var(--brand);color:var(--brand);box-shadow:0 0 24px rgba(23,225,160,.35)}
.rail-prev{left:8px}
.rail-next{right:8px}

/* ============================================================
   9. Bento 排行栅格
   ============================================================ */
.bento{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:minmax(158px,auto);gap:18px}
.bento-main{
  grid-column:span 2;grid-row:span 2;position:relative;
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);
  display:flex;flex-direction:column;justify-content:flex-end;
  min-height:340px;transition:transform 240ms var(--ease),box-shadow 240ms var(--ease);
}
.bento-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:0}
.bento-main::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,18,.15) 20%,rgba(5,10,18,.94) 100%);
}
.bento-main-body{position:relative;z-index:2;padding:28px}
.bento-rank{font-size:48px;font-weight:700;line-height:1;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:-.03em}
.bento-main-body h3{margin-top:12px;font-size:22px}
.bento-main-body p{margin-top:10px;font-size:14px;color:var(--txt-2);max-width:460px;line-height:1.8}
.bento-card{
  padding:20px;border-radius:var(--r-lg);display:flex;flex-direction:column;justify-content:space-between;
  background:var(--ink-700);border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--sh-1);
  transition:transform 240ms var(--ease),box-shadow 240ms var(--ease),border-color 240ms var(--ease);
}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(23,225,160,.4)}
.bento-card .idx{font-size:22px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}
.bento-card h3{font-size:17px;margin-top:14px}
.bento-card p{margin-top:8px;font-size:13px;color:var(--txt-2);line-height:1.75}
.bento-card .go{margin-top:16px;font-size:13px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.bento-card:hover .go{gap:11px}

/* ============================================================
   10. 分区标签页
   ============================================================ */
.tabs-vertical{display:flex;flex-direction:column;gap:10px;margin:0;border:0;background:transparent}
.tabs-vertical .tabs-title{float:none;width:100%;margin:0}
.tabs-vertical .tabs-title>a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:16px 18px;border-radius:var(--r-md);font-size:15px;font-weight:600;
  color:var(--txt-2);background:rgba(16,30,49,.62);border:1px solid var(--line);
  transition:all 220ms var(--ease);
}
.tabs-vertical .tabs-title>a::after{content:"\f054";font-family:"Font Awesome 6 Free";font-weight:900;font-size:11px;opacity:.5}
.tabs-vertical .tabs-title>a:hover{color:#fff;border-color:rgba(23,225,160,.4)}
.tabs-vertical .tabs-title.is-active>a{
  color:#fff;border-color:rgba(23,225,160,.55);
  background:linear-gradient(135deg,rgba(23,225,160,.18),rgba(23,225,160,.04));
  box-shadow:0 0 24px rgba(23,225,160,.16);
}
.tabs-content{margin:0;background:transparent;border:0}
.tabs-content .tabs-panel{padding:0}
.flow-list{display:flex;flex-direction:column;gap:12px}
.flow-item{
  display:flex;align-items:center;gap:18px;
  padding:20px 22px;border-radius:var(--r-lg);
  background:rgba(16,30,49,.5);border:1px solid var(--line);
  transition:all 240ms var(--ease);
}
.flow-item:hover{border-color:rgba(23,225,160,.45);background:rgba(23,225,160,.07);transform:translateX(4px)}
.flow-num{
  flex:0 0 44px;font-size:20px;font-weight:700;color:var(--brand);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.flow-body{flex:1;min-width:0}
.flow-body h3{font-size:17px}
.flow-body p{margin-top:6px;font-size:14px;color:var(--txt-2);line-height:1.75}
.flow-item>i{color:var(--txt-3);font-size:13px;transition:color 200ms var(--ease),transform 200ms var(--ease)}
.flow-item:hover>i{color:var(--brand);transform:translateX(3px)}

/* ============================================================
   11. 内容卡片（CMS 列表）
   ============================================================ */
.cms-grid{margin-top:0}
.cms-card{
  height:100%;display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--r-lg);
  background:var(--ink-700);border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--sh-1);
  transition:transform 240ms var(--ease),box-shadow 240ms var(--ease);
}
.cms-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.cms-thumb{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(140deg,#123055,#0A1421)}
.cms-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 420ms var(--ease)}
.cms-card:hover .cms-thumb img{transform:scale(1.04)}
.cms-thumb .badge{position:absolute;left:12px;top:12px;backdrop-filter:blur(6px)}
.cms-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.cms-body h3{font-size:17px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cms-body h3 a:hover{color:#8CF0CC}
.cms-summary{margin-top:10px;font-size:14px;color:var(--txt-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.cms-meta{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--txt-3)}
.cms-meta .more{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand);transition:gap 200ms var(--ease)}
.cms-meta .more:hover{gap:11px}
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:64px 24px;border-radius:var(--r-lg);text-align:center;
  border:1px dashed var(--line);background:rgba(16,30,49,.38);
}
.empty-state i{font-size:36px;color:var(--txt-3)}
.empty-state p{color:var(--txt-2);font-size:15px}

/* ============================================================
   12. 证据条 / 数据
   ============================================================ */
.stat-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:6px}
.stat-item{
  padding:24px 22px;border-radius:var(--r-lg);
  background:rgba(16,30,49,.5);border:1px solid var(--line);
  transition:border-color 240ms var(--ease),transform 240ms var(--ease);
}
.stat-item:hover{border-color:rgba(23,225,160,.4);transform:translateY(-3px)}
.stat-num{font-size:30px;font-weight:700;color:#fff;font-variant-numeric:tabular-nums;letter-spacing:-.03em}
.stat-num span{font-size:16px;color:var(--brand);margin-left:4px}
.stat-label{margin-top:8px;font-size:14px;color:var(--txt-2)}

/* ============================================================
   13. FAQ
   ============================================================ */
.accordion{border:0;background:transparent;margin:0}
.accordion .accordion-item{
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:rgba(16,30,49,.5);margin-bottom:12px;overflow:hidden;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease),background 220ms var(--ease);
}
.accordion .accordion-item.is-active{
  border-color:rgba(23,225,160,.45);
  background:rgba(23,225,160,.06);
  box-shadow:0 0 26px rgba(23,225,160,.12);
}
.accordion .accordion-title{
  position:relative;display:block;padding:18px 54px 18px 36px;
  font-size:16px;font-weight:600;color:#fff;border:0;background:transparent;
}
.accordion .accordion-title::before{
  content:"";position:absolute;left:16px;top:16px;bottom:16px;width:3px;border-radius:3px;
  background:var(--brand);opacity:0;transition:opacity 220ms var(--ease);
}
.accordion .accordion-item.is-active .accordion-title::before{opacity:1}
.accordion .accordion-title::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;
  position:absolute;right:22px;top:50%;transform:translateY(-50%);
  color:var(--txt-3);transition:transform 220ms var(--ease),color 220ms var(--ease);
}
.accordion .accordion-item.is-active .accordion-title::after{color:var(--brand);transform:translateY(-50%) rotate(180deg)}
.accordion .accordion-content{
  padding:0 24px 20px 36px;border:0;background:transparent;
  color:var(--txt-2);font-size:15px;line-height:1.85;
}

/* ============================================================
   14. 转化面板
   ============================================================ */
.cta-panel{
  display:flex;align-items:center;justify-content:space-between;gap:34px;flex-wrap:wrap;
  padding:46px 44px;border-radius:22px;
  border:1px solid rgba(23,225,160,.42);
  background:linear-gradient(135deg,rgba(23,225,160,.13),rgba(16,30,49,.72) 60%,rgba(10,20,33,.9));
  box-shadow:inset 0 0 70px rgba(23,225,160,.07),var(--sh-1);
}
.cta-panel h2{font-size:28px}
.cta-panel p{margin-top:12px;color:var(--txt-2);font-size:15px;max-width:640px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============================================================
   15. 页脚
   ============================================================ */
.site-footer{margin-top:100px;background:var(--ink-800);border-top:1px solid var(--line);padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px}
.footer-brand .brand{margin-bottom:18px}
.footer-desc{font-size:14px;color:var(--txt-2);line-height:1.85;max-width:320px}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--txt-2);font-size:15px;
  transition:all 220ms var(--ease);
}
.footer-social a:hover{border-color:var(--brand);color:var(--brand);background:rgba(23,225,160,.1);transform:translateY(-3px)}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:var(--txt-2);transition:color 200ms var(--ease),padding-left 200ms var(--ease)}
.footer-col a:hover{color:var(--brand);padding-left:4px}
.subscribe-form{display:flex;gap:10px;margin-top:16px}
.subscribe-form input{
  flex:1;height:46px;min-width:0;padding:0 16px;border-radius:var(--r-md);
  background:rgba(5,10,18,.65);border:1px solid var(--line);color:#fff;font-size:14px;
  transition:border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.subscribe-form input::placeholder{color:var(--txt-3)}
.subscribe-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(23,225,160,.16)}
.form-note{margin-top:12px;font-size:13px;color:var(--txt-3)}
.footer-bottom{
  margin-top:56px;padding:24px 0;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--txt-2);
}
.footer-bottom a{color:var(--txt-2)}
.footer-bottom a:hover{color:var(--brand)}

/* ============================================================
   16. 动效与无障碍
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}

/* ============================================================
   17. 响应式
   ============================================================ */
@media (max-width:1439px){
  .hero-inner{gap:40px}
}
@media (max-width:1023px){
  .section{padding:72px 0 0}
  h1{font-size:34px}
  h2{font-size:23px}
  .header-inner{height:64px}
  .nav-toggle{display:grid}
  .main-nav{
    position:fixed;top:0;left:0;right:0;height:100vh;height:100dvh;
    flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:88px 22px 120px;flex:0 0 auto;
    background:rgba(5,10,18,.98);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    transform:translateX(102%);transition:transform 280ms var(--ease);
    z-index:90;overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0)}
  .main-nav .nav-link{
    height:56px;font-size:17px;font-weight:600;color:#fff;
    padding:0 12px;border-radius:12px;justify-content:space-between;
    border-bottom:1px solid rgba(120,180,255,.1);
  }
  .main-nav .nav-link::after{display:none}
  .main-nav .nav-link i{transform:rotate(-90deg)}
  .nav-cta{
    display:flex;position:fixed;left:22px;right:22px;bottom:26px;z-index:95;
    opacity:0;pointer-events:none;transition:opacity 240ms var(--ease);
  }
  .nav-cta.is-visible{opacity:1;pointer-events:auto}
  .hero{padding:120px 0 72px}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero-card{max-width:520px}
  .bento{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bento-main{grid-column:span 2;grid-row:span 1;min-height:300px}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .rail-arrow{display:none}
  .cta-panel{padding:36px 28px}
}
@media (max-width:639px){
  body{font-size:15px;line-height:1.8}
  .container{padding:0 20px}
  .section{padding:56px 0 0}
  h1{font-size:27px;line-height:1.35}
  h2{font-size:21px}
  h3{font-size:17px}
  .hero{padding:106px 0 56px}
  .hero-sub{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-badges{gap:16px;margin-top:26px}
  .section-head{margin-bottom:24px}
  .bento{grid-template-columns:1fr}
  .bento-main{grid-column:span 1;min-height:260px}
  .bento-main-body{padding:22px}
  .bento-rank{font-size:38px}
  .stat-strip{grid-template-columns:1fr}
  .flow-item{padding:16px;gap:14px;align-items:flex-start}
  .flow-num{flex:0 0 34px;font-size:17px}
  .cta-panel{padding:30px 22px;border-radius:18px}
  .cta-panel h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .subscribe-form{flex-direction:column}
  .subscribe-form .btn{width:100%}
  .rail-card{flex:0 0 190px}
  .rail{padding-left:20px;padding-right:20px}
  .accordion .accordion-title{padding:16px 46px 16px 30px;font-size:15px}
  .accordion .accordion-content{padding:0 20px 18px 30px;font-size:14px}
  .accordion .accordion-title::before{left:12px;top:14px;bottom:14px}
  .footer-bottom{justify-content:flex-start}
}
@media (min-width:1440px){
  .container{max-width:var(--maxw)}
}

/* ============================================================
   18. 打印基础
   ============================================================ */
@media print{
  body{background:#fff;color:#111}
  .site-header,.site-footer,.cta-panel,.rail-arrow{display:none}
  .hero{min-height:auto;padding:20px 0}
}

/* roulang page: article */
:root{
  --ink-900:#050A12;
  --ink-800:#0A1421;
  --ink-700:rgba(16,30,49,.62);
  --brand:#17E1A0;
  --brand-deep:#0FB984;
  --accent:#FFB23F;
  --violet:#7C5CFF;
  --coral:#FF6B6B;
  --sky:#35C3FF;
  --line:rgba(120,180,255,.14);
  --txt:#E6EDF7;
  --txt-2:#93A4BE;
  --txt-3:#5C6B82;
  --r-card:18px;
  --r-sm:10px;
  --r-pill:999px;
  --r-input:14px;
  --sd-1:0 18px 40px rgba(0,0,0,.45);
  --sd-2:0 24px 56px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1280px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--ink-900);
  color:var(--txt);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(720px 480px at 12% -8%, rgba(23,225,160,.09), transparent 68%),
    radial-gradient(680px 420px at 88% 4%, rgba(255,178,63,.07), transparent 66%);
}
img{max-width:100%;display:block;border-radius:14px;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:#fff;letter-spacing:-.02em;}
p{margin:0;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font-family:inherit;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
main{position:relative;z-index:1;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 22px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background-color .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease);
  white-space:nowrap;
}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-primary{
  color:#05130E;
  background:linear-gradient(135deg,#17E1A0,#0FB984);
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 26px rgba(23,225,160,.28);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(23,225,160,.6),0 10px 34px rgba(23,225,160,.42);transform:translateY(-2px);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  color:var(--txt);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:rgba(23,225,160,.65);background:rgba(23,225,160,.10);transform:translateY(-2px);}
.btn-block{width:100%;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  border-bottom:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),backdrop-filter .2s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,10,18,.80);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:74px;
}
.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(140deg,rgba(23,225,160,.92),rgba(12,142,102,.85));
  color:#04120C;
  font-size:16px;
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 22px rgba(23,225,160,.26);
}
.brand-text{font-size:18px;font-weight:700;color:#fff;letter-spacing:-.01em;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 13px;
  border-radius:8px;
  font-size:14.5px;
  font-weight:500;
  color:var(--txt-2);
  position:relative;
  white-space:nowrap;
}
.nav-link i{font-size:13px;opacity:.85;}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06);}
.nav-link.is-active{color:#fff;}
.nav-link.is-active::after{
  content:"";
  position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
  box-shadow:0 0 12px rgba(23,225,160,.7);
}
.header-actions{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  color:#fff;
  font-size:17px;
}

/* ---------- 文章头部 ---------- */
.article-hero{
  padding:38px 0 0;
  background-image:linear-gradient(180deg,rgba(5,10,18,.62),rgba(5,10,18,.94)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--txt-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--txt-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--txt-3);}
.breadcrumb .current{color:var(--txt-2);max-width:48ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;line-height:1.5;
  padding:4px 10px;border-radius:var(--r-sm);
  background:rgba(23,225,160,.13);
  color:var(--brand);
  border:1px solid rgba(23,225,160,.22);
}
.badge.badge-violet{background:rgba(124,92,255,.14);color:#B7A6FF;border-color:rgba(124,92,255,.26);}
.badge.badge-accent{background:rgba(255,178,63,.13);color:var(--accent);border-color:rgba(255,178,63,.24);}
.article-hero h1{
  font-size:clamp(28px,4vw,42px);
  line-height:1.28;
  font-weight:700;
  margin:16px 0 18px;
  max-width:22ch;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
  font-size:13.5px;color:var(--txt-2);
  font-variant-numeric:tabular-nums;
  padding-bottom:30px;
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--txt-3);}
.article-cover{
  margin:0 0 -46px;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--sd-1);
  aspect-ratio:16/9;
  background:linear-gradient(135deg,rgba(23,225,160,.16),rgba(10,20,33,.9));
}
.article-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;}

/* ---------- 布局 ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:48px;
  padding:96px 0 96px;
}
@media(min-width:1280px){
  .article-layout{grid-template-columns:minmax(0,1fr) 288px;}
}
.article-main{max-width:820px;}

/* ---------- 正文 ---------- */
.article-body{
  background:var(--ink-700);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-card);
  padding:34px 32px;
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--sd-1);
}
.article-body h2{
  font-size:26px;line-height:1.4;font-weight:700;
  margin:44px 0 16px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;
  width:4px;height:20px;border-radius:3px;
  background:var(--brand);box-shadow:0 0 14px rgba(23,225,160,.65);
}
.article-body h2:first-child{margin-top:0;}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;margin:32px 0 12px;color:#fff;}
.article-body h4{font-size:17px;line-height:1.5;font-weight:600;margin:24px 0 10px;color:#fff;}
.article-body p{margin:0 0 18px;color:var(--txt);max-width:44ch;}
.article-body strong{color:#fff;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(23,225,160,.35);}
.article-body a:hover{border-bottom-color:var(--brand);}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:2px;}
.article-body ul li,.article-body ol li{
  position:relative;padding-left:24px;margin-bottom:10px;color:var(--txt);
}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.72em;
  width:7px;height:7px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 10px rgba(23,225,160,.6);
}
.article-body ol{counter-reset:li;}
.article-body ol li{counter-increment:li;}
.article-body ol li::before{
  content:counter(li);
  position:absolute;left:0;top:.28em;
  width:18px;height:18px;border-radius:6px;
  display:flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:700;color:var(--brand);
  background:rgba(23,225,160,.13);
}
.article-body blockquote{
  margin:24px 0;
  padding:16px 20px;
  background:rgba(255,255,255,.04);
  border-left:3px solid var(--brand);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--txt-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{width:100%;height:auto;border-radius:14px;margin:20px 0;border:1px solid rgba(255,255,255,.08);}
.article-body figure{margin:24px 0;}
.article-body figcaption,figcaption{
  text-align:center;font-size:13px;color:var(--txt-3);margin-top:-8px;
}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px;
  border:1px solid var(--line);border-radius:var(--r-sm);overflow:hidden;
}
.article-body th,.article-body td{
  padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;
}
.article-body th{background:rgba(255,255,255,.05);color:#fff;font-weight:600;}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.02);}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13.5px;padding:2px 6px;border-radius:6px;
  background:rgba(23,225,160,.10);color:#8CF0CD;
}
.article-body pre{
  background:rgba(3,8,15,.85);border:1px solid var(--line);
  border-radius:var(--r-sm);padding:16px 18px;overflow-x:auto;margin:20px 0;
}
.article-body pre code{background:none;padding:0;color:#CFE4F7;}

.article-empty{
  text-align:center;padding:56px 24px;
}
.article-empty i{font-size:46px;color:var(--txt-3);display:block;margin-bottom:16px;}
.article-empty p{color:var(--txt-2);margin-bottom:22px;}

/* ---------- 文末 ---------- */
.article-tags{
  display:flex;flex-wrap:wrap;gap:10px;margin:32px 0 0;
}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 13px;border-radius:var(--r-sm);
  font-size:13px;font-weight:500;color:var(--txt-2);
  background:rgba(255,255,255,.04);border:1px solid var(--line);
}
.tag:hover{color:var(--brand);border-color:rgba(23,225,160,.5);}

.post-nav{
  display:grid;gap:16px;grid-template-columns:1fr;margin-top:40px;
}
@media(min-width:640px){.post-nav{grid-template-columns:1fr 1fr;}}
.post-nav a{
  display:flex;flex-direction:column;gap:8px;
  padding:20px;border-radius:var(--r-card);
  background:var(--ink-700);border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(14px);
}
.post-nav a:hover{transform:translateY(-4px);border-color:rgba(23,225,160,.45);box-shadow:var(--sd-2);}
.post-nav .label{font-size:12.5px;color:var(--accent);letter-spacing:.06em;}
.post-nav .title{font-size:16px;font-weight:600;color:#fff;line-height:1.5;}

.section-head{margin-bottom:26px;}
.section-head h2{font-size:26px;line-height:1.4;font-weight:700;}
.section-head p{color:var(--txt-2);font-size:14.5px;margin-top:8px;}

.related{margin-top:72px;}
.related-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media(min-width:640px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(min-width:1024px){.related-grid{grid-template-columns:repeat(3,minmax(0,1fr));}}
.card{
  display:flex;flex-direction:column;
  background:var(--ink-700);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-card);
  overflow:hidden;
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--sd-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sd-2);border-color:rgba(23,225,160,.35);}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,rgba(23,225,160,.2),rgba(10,20,33,.9));}
.card-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s var(--ease);}
.card:hover .card-thumb img{transform:scale(1.04);}
.card-badge{position:absolute;top:12px;left:12px;}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17px;line-height:1.5;font-weight:600;}
.card-body p{font-size:14px;color:var(--txt-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--txt-3);font-variant-numeric:tabular-nums;}
.card-foot .more{color:var(--brand);display:inline-flex;align-items:center;gap:6px;}

/* ---------- 侧栏 ---------- */
.article-side{display:flex;flex-direction:column;gap:20px;}
@media(min-width:1280px){
  .article-side{position:sticky;top:98px;align-self:start;}
}
.side-card{
  background:var(--ink-700);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-card);
  padding:22px;
  backdrop-filter:blur(14px) saturate(140%);
}
.side-card h3{font-size:15px;font-weight:600;margin-bottom:14px;color:#fff;}
.side-list li{margin-bottom:4px;}
.side-list a{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;border-radius:10px;
  font-size:14px;color:var(--txt-2);
}
.side-list a::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--txt-3);flex:0 0 auto;
}
.side-list a:hover,.side-list a.is-current{color:#fff;background:rgba(23,225,160,.10);}
.side-list a:hover::before,.side-list a.is-current::before{background:var(--brand);box-shadow:0 0 10px rgba(23,225,160,.7);}
.side-cta{
  border:1px solid rgba(23,225,160,.4);
  background:linear-gradient(160deg,rgba(23,225,160,.14),rgba(10,20,33,.7));
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:0 0 26px rgba(23,225,160,.14) inset;
}
.side-cta h3{font-size:17px;margin-bottom:8px;}
.side-cta p{font-size:13.5px;color:var(--txt-2);margin-bottom:16px;}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  margin-top:72px;
  border:1px solid rgba(23,225,160,.4);
  border-radius:24px;
  padding:44px 38px;
  background:linear-gradient(140deg,rgba(23,225,160,.12),rgba(10,20,33,.72));
  box-shadow:0 0 34px rgba(23,225,160,.12) inset;
  display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between;
}
.cta-panel h2{font-size:24px;line-height:1.45;margin-bottom:10px;}
.cta-panel p{color:var(--txt-2);font-size:15px;max-width:52ch;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,20,33,.75),rgba(5,10,18,.98));
  padding-top:64px;
}
.footer-grid{
  display:grid;gap:36px;grid-template-columns:1fr;
}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.3fr;}}
.footer-brand .brand{margin-bottom:14px;}
.footer-desc{font-size:14px;color:var(--txt-2);max-width:40ch;line-height:1.8;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt-2);
}
.footer-social a:hover{color:var(--brand);border-color:rgba(23,225,160,.5);}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;color:#fff;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:var(--txt-2);}
.footer-col ul a:hover{color:var(--brand);}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap;}
.subscribe-form input{
  flex:1 1 160px;min-height:46px;padding:0 14px;
  border-radius:var(--r-input);
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--txt);font-size:14px;
}
.subscribe-form input::placeholder{color:var(--txt-3);}
.subscribe-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(23,225,160,.18);}
.form-note{font-size:12.5px;color:var(--txt-3);margin-top:10px;}
.footer-bottom{
  margin-top:52px;padding:22px 0 30px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--txt-2);
}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- 响应式 ---------- */
@media(max-width:1023px){
  .header-inner{min-height:66px;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .main-nav{
    position:fixed;
    inset:66px 0 0 0;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:18px 20px 28px;
    margin:0;
    background:rgba(5,10,18,.98);
    backdrop-filter:blur(18px);
    overflow-y:auto;
    display:none;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{
    min-height:56px;padding:0 14px;font-size:16px;
    justify-content:flex-start;border-radius:12px;
  }
  .nav-link i{width:20px;}
  .nav-link.is-active{background:rgba(23,225,160,.10);}
  .nav-link.is-active::after{display:none;}
  .header-actions .btn-ghost{display:none;}
  .article-layout{padding:80px 0 72px;gap:36px;}
  .article-cover{margin-bottom:-38px;}
  .cta-panel{padding:34px 26px;}
}
@media(max-width:639px){
  .container{padding:0 20px;}
  .header-actions .btn-primary span{display:none;}
  .article-hero{padding-top:26px;}
  .article-body{padding:24px 20px;}
  .article-body h2{font-size:22px;}
  .article-layout{padding:64px 0 56px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media(min-width:1440px){
  .container{max-width:1280px;}
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
:root{
  --ink-900:#050A12;
  --ink-800:#0A1421;
  --ink-700:rgba(16,30,49,.62);
  --glass:rgba(16,30,49,.62);
  --brand:#17E1A0;
  --brand-dark:#0FB984;
  --brand-ink:#05130E;
  --accent:#FFB23F;
  --violet:#7C5CFF;
  --coral:#FF6B6B;
  --cyan:#35C3FF;
  --line:rgba(120,180,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --txt:#E6EDF7;
  --txt-2:#93A4BE;
  --txt-3:#5C6B82;
  --r-card:18px;
  --r-sm:10px;
  --r-btn:999px;
  --r-input:14px;
  --r-img:14px;
  --sh-1:0 18px 40px rgba(0,0,0,.45);
  --sh-2:0 24px 56px rgba(0,0,0,.55);
  --sh-brand:0 8px 26px rgba(23,225,160,.28);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sec:96px;
}
/* ============ reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--txt);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;}
h1,h2,h3,h4{line-height:1.3;letter-spacing:-.01em;}
h1{font-size:40px;font-weight:700;letter-spacing:-.02em;line-height:1.25;}
h2{font-size:26px;font-weight:700;line-height:1.34;}
h3{font-size:20px;font-weight:600;line-height:1.4;}
h4{font-size:17px;font-weight:600;line-height:1.45;}
p{color:var(--txt-2);}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
::selection{background:rgba(23,225,160,.28);color:#fff;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
/* ============ 容器与板块 ============ */
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px;}
.section{padding:var(--sec) 0;position:relative;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);letter-spacing:.08em;margin-bottom:10px;}
.section-head p{max-width:640px;margin-top:10px;}
.lead{font-size:17px;color:var(--txt-2);max-width:820px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;padding:13px 26px;min-height:44px;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease),filter .24s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#17E1A0,#0FB984);
  color:var(--brand-ink);
  box-shadow:0 0 0 1px rgba(23,225,160,.45),var(--sh-brand);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(23,225,160,.55),0 10px 34px rgba(23,225,160,.42);transform:translateY(-2px);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:var(--line);
  color:var(--txt);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:rgba(23,225,160,.6);background:rgba(23,225,160,.08);transform:translateY(-2px);}
.btn-sm{padding:9px 18px;font-size:14px;min-height:38px;}
.btn-block{width:100%;}
/* ============ 标签 / 徽章 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;padding:4px 10px;border-radius:var(--r-sm);
  background:rgba(23,225,160,.12);color:var(--brand);line-height:1.5;
}
.badge-violet{background:rgba(124,92,255,.16);color:#B4A5FF;}
.badge-accent{background:rgba(255,178,63,.14);color:var(--accent);}
.badge-cyan{background:rgba(53,195,255,.14);color:var(--cyan);}
.badge-coral{background:rgba(255,107,107,.14);color:var(--coral);}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;
  padding:6px 12px;border-radius:var(--r-btn);
  border:1px solid var(--line);color:var(--txt-2);background:rgba(255,255,255,.03);
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);display:inline-block;}
/* ============ 头部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:70;
  padding:16px 0;border-bottom:1px solid transparent;
  transition:padding .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),backdrop-filter .2s var(--ease);
}
.site-header.is-scrolled{
  padding:9px 0;
  background:rgba(5,10,18,.82);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,#17E1A0,#0FB984);color:var(--brand-ink);
  font-size:16px;box-shadow:0 0 0 1px rgba(23,225,160,.4),0 6px 20px rgba(23,225,160,.3);
}
.brand-text{font-size:19px;font-weight:700;letter-spacing:-.01em;color:#fff;}
.main-nav{display:flex;align-items:center;gap:2px;flex:1;justify-content:center;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:8px 12px;border-radius:6px;font-size:14px;font-weight:500;color:var(--txt-2);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link i{font-size:12px;opacity:.8;}
.nav-link:hover{color:var(--txt);background:rgba(255,255,255,.06);}
.nav-link.is-active{color:#fff;}
.nav-link.is-active i{color:var(--brand);opacity:1;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--brand);border-radius:2px;box-shadow:0 0 10px var(--brand);
}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;align-items:center;justify-content:center;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--txt);font-size:17px;cursor:pointer;
}
.nav-toggle:hover{border-color:rgba(23,225,160,.5);color:var(--brand);}
/* ============ 分类头图 ============ */
.cat-hero{
  position:relative;margin-top:0;padding:170px 0 64px;
  background-image:linear-gradient(180deg,rgba(5,10,18,.72) 0%,rgba(5,10,18,.86) 55%,var(--ink-900) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;overflow:hidden;
}
.cat-hero::before{
  content:"";position:absolute;inset:-20% -10% auto -10%;height:520px;pointer-events:none;
  background:radial-gradient(circle at 22% 40%,rgba(23,225,160,.16),transparent 58%),
             radial-gradient(circle at 78% 22%,rgba(255,178,63,.12),transparent 60%);
  filter:blur(20px);
}
.cat-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:48px;align-items:center;}
.cat-hero h1{font-size:40px;margin:18px 0 16px;}
.cat-hero h1 span{color:var(--brand);}
.cat-hero p{max-width:640px;font-size:17px;}
.crumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--txt-3);}
.crumb a{color:var(--txt-2);transition:color .2s var(--ease);}
.crumb a:hover{color:var(--brand);}
.crumb i{font-size:10px;}
.crumb .current{color:var(--txt-2);}
.hero-stats{
  display:grid;gap:14px;padding:22px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line-soft);
  backdrop-filter:blur(14px) saturate(140%);box-shadow:var(--sh-1);
}
.hero-stats .stat{display:flex;align-items:baseline;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--line);}
.hero-stats .stat:last-child{border-bottom:0;padding-bottom:0;}
.hero-stats .stat strong{font-size:26px;color:var(--brand);font-weight:700;}
.hero-stats .stat span{font-size:13px;color:var(--txt-2);}
/* ============ 卡片族 ============ */
.card{
  background:var(--glass);border:1px solid var(--line-soft);border-radius:var(--r-card);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
  position:relative;
}
.card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(23,225,160,.28);}
.card-body{padding:22px 24px 24px;}
.card-body h3{margin-bottom:10px;}
.card-body p{font-size:15px;line-height:1.8;}
.card-media{position:relative;overflow:hidden;aspect-ratio:16/9;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.card:hover .card-media img{transform:scale(1.04);}
.card-badge{position:absolute;top:12px;left:12px;z-index:2;}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;font-size:13px;color:var(--txt-3);}
.card-foot .arrow{color:var(--brand);transition:transform .24s var(--ease);}
.card:hover .card-foot .arrow{transform:translateX(4px);}
/* ============ 概览四卡（横滑） ============ */
.rail-wrap{position:relative;}
.rail{
  display:flex;gap:20px;overflow-x:auto;padding:6px 4px 18px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none;}
.rail > *{scroll-snap-align:start;flex:0 0 300px;}
.rail-nav{display:flex;gap:10px;}
.rail-btn{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--txt);cursor:pointer;
  transition:all .24s var(--ease);
}
.rail-btn:hover{color:var(--brand);border-color:rgba(23,225,160,.6);box-shadow:0 0 20px rgba(23,225,160,.25);}
/* ============ zigzag ============ */
.zigzag{display:grid;gap:56px;}
.zigzag-row{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;}
.zigzag-row.is-reverse .zigzag-media{order:2;}
.zigzag-media{position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);border:1px solid var(--line-soft);}
.zigzag-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease);}
.zigzag-media:hover img{transform:scale(1.03);}
.zigzag-media .float-tag{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:var(--r-btn);
  background:rgba(5,10,18,.7);border:1px solid var(--line);backdrop-filter:blur(10px);
  font-size:13px;font-weight:600;color:var(--txt);
}
.zigzag-media .step-no{
  position:absolute;right:18px;top:18px;z-index:2;
  width:52px;height:52px;border-radius:14px;display:grid;place-items:center;
  background:rgba(5,10,18,.72);border:1px solid rgba(23,225,160,.4);
  color:var(--brand);font-size:22px;font-weight:700;backdrop-filter:blur(10px);
}
.zigzag-text h2{margin-bottom:14px;}
.zigzag-text > p{margin-bottom:20px;max-width:620px;}
.check-list{display:grid;gap:12px;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--txt-2);line-height:1.75;}
.check-list li i{color:var(--brand);font-size:14px;margin-top:6px;flex-shrink:0;}
.check-list li strong{color:var(--txt);font-weight:600;}
/* ============ 环境自检 ============ */
.selfcheck{
  border-radius:24px;padding:44px;border:1px solid var(--line-soft);
  background:linear-gradient(135deg,rgba(16,30,49,.7),rgba(10,20,33,.55));
  backdrop-filter:blur(14px);box-shadow:var(--sh-1);
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
}
.selfcheck-item{
  display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--line);
}
.selfcheck-item:last-child{border-bottom:0;}
.selfcheck-item .idx{
  flex:0 0 38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(23,225,160,.1);color:var(--brand);font-weight:700;font-size:15px;
  font-variant-numeric:tabular-nums;
}
.selfcheck-item h4{margin-bottom:4px;color:var(--txt);}
.selfcheck-item p{font-size:14px;line-height:1.75;}
/* ============ 提示对照 ============ */
.notice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.notice-card{
  display:flex;gap:16px;padding:22px 24px;border-radius:var(--r-card);
  background:rgba(16,30,49,.5);border:1px solid var(--line-soft);
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.notice-card:hover{border-color:rgba(23,225,160,.3);transform:translateY(-3px);box-shadow:var(--sh-1);}
.notice-ico{
  flex:0 0 44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:17px;
  background:rgba(53,195,255,.12);color:var(--cyan);
}
.notice-card.warn .notice-ico{background:rgba(255,178,63,.13);color:var(--accent);}
.notice-card.danger .notice-ico{background:rgba(255,107,107,.13);color:var(--coral);}
.notice-card strong{display:block;color:var(--txt);font-size:15px;font-weight:600;margin-bottom:6px;}
.notice-card p{font-size:14px;line-height:1.75;}
/* ============ FAQ ============ */
.faq-wrap{max-width:920px;margin:0 auto;}
.accordion{background:transparent;border:0;margin:0;}
.accordion-item{
  background:var(--glass);border:1px solid var(--line-soft);border-radius:16px;
  margin-bottom:14px;overflow:hidden;backdrop-filter:blur(14px);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.accordion-item.is-active{border-color:rgba(23,225,160,.35);box-shadow:0 12px 34px rgba(0,0,0,.4);}
.accordion-title{
  display:block;position:relative;padding:20px 60px 20px 26px;
  background:transparent;border:0;color:var(--txt);font-size:17px;font-weight:600;line-height:1.5;
  transition:color .24s var(--ease);
}
.accordion-title:hover{color:var(--brand);}
.accordion-title::before{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:24px;top:50%;transform:translateY(-50%);
  color:var(--brand);font-size:13px;transition:transform .24s var(--ease);
}
.accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(180deg);}
.accordion-item.is-active .accordion-title::after{
  content:"";position:absolute;left:0;top:14%;width:3px;height:72%;
  background:var(--brand);border-radius:0 3px 3px 0;box-shadow:0 0 14px rgba(23,225,160,.6);
}
.accordion-content{
  padding:0 60px 22px 26px !important;border:0 !important;background:transparent !important;
  color:var(--txt-2);font-size:15px;line-height:1.85;
}
/* ============ 交叉导航 + CTA ============ */
.cross-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
.cross-link{
  display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt-2);
  font-size:14px;font-weight:500;transition:all .24s var(--ease);
}
.cross-link:hover{color:var(--txt);border-color:rgba(23,225,160,.6);background:rgba(23,225,160,.08);transform:translateY(-2px);}
.cta-panel{
  margin-top:56px;border-radius:26px;padding:48px;
  border:1px solid rgba(23,225,160,.35);
  background:radial-gradient(circle at 12% 20%,rgba(23,225,160,.14),transparent 55%),linear-gradient(135deg,rgba(16,30,49,.85),rgba(10,20,33,.75));
  box-shadow:0 0 60px rgba(23,225,160,.1),var(--sh-1);
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
}
.cta-panel h2{margin-bottom:12px;}
.cta-panel p{max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);margin-top:96px;padding:70px 0 28px;
  background:linear-gradient(180deg,rgba(10,20,33,.6),var(--ink-900) 60%);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{font-size:14px;line-height:1.8;max-width:320px;}
.footer-social{display:flex;gap:10px;margin-top:20px;}
.footer-social a{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt-2);
  transition:all .24s var(--ease);
}
.footer-social a:hover{color:var(--brand);border-color:rgba(23,225,160,.55);transform:translateY(-3px);}
.footer-col h4{font-size:15px;margin-bottom:18px;color:#fff;}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul a{font-size:14px;color:var(--txt-2);transition:color .2s var(--ease),padding-left .2s var(--ease);}
.footer-col ul a:hover{color:var(--brand);padding-left:4px;}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap;}
.subscribe-form input{
  flex:1 1 150px;min-height:44px;padding:10px 16px;border-radius:var(--r-input);
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--txt);
  font-size:14px;font-family:inherit;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.subscribe-form input::placeholder{color:var(--txt-3);}
.subscribe-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(23,225,160,.16);}
.form-note{font-size:12px;color:var(--txt-3);margin-top:10px;}
.footer-bottom{
  margin-top:52px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:var(--txt-2);
}
.footer-bottom a{color:var(--txt-2);transition:color .2s var(--ease);}
.footer-bottom a:hover{color:var(--brand);}
/* ============ 动效 ============ */
.reveal-up{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal-up.is-in{opacity:1;transform:none;}
/* ============ 响应式 ============ */
@media (max-width:1439px){
  .container{max-width:1240px;}
}
@media (max-width:1023px){
  :root{--sec:72px;}
  h1{font-size:32px;}
  .cat-hero{padding:150px 0 56px;}
  .cat-hero h1{font-size:32px;}
  .cat-hero-inner{grid-template-columns:1fr;gap:32px;}
  .hero-stats{grid-template-columns:1fr 1fr;display:grid;}
  .zigzag-row{grid-template-columns:1fr;gap:28px;}
  .zigzag-row.is-reverse .zigzag-media{order:0;}
  .selfcheck{grid-template-columns:1fr;padding:32px;gap:24px;}
  .notice-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;z-index:65;
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:6px;
    padding:94px 24px 40px;
    background:rgba(5,10,18,.97);backdrop-filter:blur(18px) saturate(140%);
    transform:translateY(-102%);transition:transform .32s var(--ease);
    overflow-y:auto;
  }
  .main-nav.is-open{transform:none;}
  .nav-link{
    height:56px;font-size:17px;padding:0 18px;border-radius:12px;
    justify-content:space-between;flex-direction:row-reverse;
  }
  .nav-link.is-active::after{display:none;}
  .nav-link.is-active{background:rgba(23,225,160,.1);}
  .nav-toggle{display:inline-flex;position:relative;z-index:75;}
  .header-actions .btn-ghost{display:none;}
  .site-header{background:rgba(5,10,18,.72);backdrop-filter:blur(14px);}
}
@media (max-width:639px){
  :root{--sec:56px;}
  .container{padding:0 20px;}
  h1{font-size:28px;line-height:1.3;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  .cat-hero{padding:132px 0 48px;}
  .cat-hero h1{font-size:28px;}
  .hero-stats{grid-template-columns:1fr;}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;}
  .cta-panel{padding:30px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .accordion-content{padding:0 24px 20px 20px !important;}
  .accordion-title{padding:18px 54px 18px 20px;font-size:16px;}
  .rail > *{flex:0 0 82%;}
  .brand-text{font-size:17px;}
}
@media print{
  .site-header,.cta-panel,.rail-nav,.site-footer{display:none;}
  body{background:#fff;color:#000;}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --ink-900:#050A12;
  --ink-800:#0A1421;
  --ink-700:rgba(16,30,49,.62);
  --brand:#17E1A0;
  --brand-deep:#0FB984;
  --accent:#FFB23F;
  --cat:#35C3FF;
  --cat-soft:rgba(53,195,255,.14);
  --line:rgba(120,180,255,.14);
  --line-strong:rgba(120,180,255,.28);
  --txt:#E6EDF7;
  --txt-2:#93A4BE;
  --txt-3:#5C6B82;
  --r-card:18px;
  --r-sm:10px;
  --r-pill:999px;
  --r-input:14px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-hover:0 24px 56px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1280px;
  --gap-section:96px;
}
/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(900px 480px at 12% -6%,rgba(23,225,160,.08),transparent 62%),
    radial-gradient(760px 420px at 92% 4%,rgba(255,178,63,.06),transparent 60%),
    var(--ink-900);
  color:var(--txt);
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:14px;}
a{color:var(--txt);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--brand);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-.01em;}
h1{font-size:40px;line-height:1.25;letter-spacing:-.02em;}
h2{font-size:26px;line-height:1.34;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
h4{font-size:17px;line-height:1.45;font-weight:600;}
p{margin:0 0 16px;color:var(--txt-2);}
p:last-child{margin-bottom:0;}
button,input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(23,225,160,.28);color:#fff;}
/* 覆盖 Foundation 默认味道 */
body,.button,button,input,select,textarea{font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;}
.accordion,.grid-x,.grid-container{margin:0;}
/* ============ 容器与板块 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--gap-section) 0;}
.section-tight{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
.section-head p{margin:8px 0 0;max-width:640px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--brand);text-transform:uppercase;
}
.eyebrow::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--brand);}
.divider{height:1px;background:var(--line);border:0;margin:0;}
/* ============ 导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  padding:14px 0;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .2s var(--ease),border-color .2s var(--ease),padding .2s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,10,18,.78);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  border-bottom-color:var(--line);
  padding:8px 0;
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),var(--brand-deep));
  color:#05130E;font-size:16px;
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 22px rgba(23,225,160,.28);
}
.brand-text{font-size:19px;font-weight:700;letter-spacing:-.01em;color:#fff;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1 1 auto;flex-wrap:wrap;}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 12px;border-radius:6px;
  font-size:14px;font-weight:500;color:var(--txt-2);
  border-bottom:2px solid transparent;
}
.nav-link i{font-size:13px;color:var(--txt-3);transition:color .2s var(--ease);}
.nav-link:hover{background:rgba(23,225,160,.08);color:var(--txt);}
.nav-link:hover i{color:var(--brand);}
.nav-link.is-active{color:#fff;border-bottom-color:var(--brand);}
.nav-link.is-active i{color:var(--brand);}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:var(--ink-700);border:1px solid var(--line);
  color:var(--txt);cursor:pointer;font-size:16px;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;min-height:44px;
  border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease);
}
.btn-sm{padding:9px 16px;font-size:14px;min-height:40px;}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  color:#05130E;
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 26px rgba(23,225,160,.28);
}
.btn-primary:hover{
  color:#05130E;filter:brightness(1.08);
  box-shadow:0 0 0 1px rgba(23,225,160,.6),0 10px 34px rgba(23,225,160,.42);
  transform:translateY(-2px);
}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:var(--ink-700);
  border-color:var(--line);
  color:var(--txt);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(23,225,160,.08);}
.btn-wide{width:100%;}
/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-sm);
  font-size:13px;font-weight:500;line-height:1.5;
}
.badge-cat{background:var(--cat-soft);color:var(--cat);}
.badge-brand{background:rgba(23,225,160,.14);color:var(--brand);}
.badge-accent{background:rgba(255,178,63,.16);color:var(--accent);}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:var(--r-pill);
  background:var(--ink-700);border:1px solid var(--line);
  font-size:13px;color:var(--txt-2);
}
.tag i{color:var(--brand);font-size:12px;}
/* ============ 分类头图 ============ */
.cat-hero{
  position:relative;overflow:hidden;
  padding:150px 0 64px;
  border-bottom:1px solid var(--line);
}
.cat-hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.32;filter:saturate(115%);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,18,.72) 0%,rgba(5,10,18,.9) 58%,var(--ink-900) 100%);
}
.cat-hero-inner{position:relative;z-index:2;max-width:900px;}
.crumb{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--txt-3);margin-bottom:20px;flex-wrap:wrap;}
.crumb a{color:var(--txt-2);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--txt-3);}
.crumb .current{color:var(--txt-2);}
.cat-hero h1{margin:16px 0 18px;max-width:16em;}
.cat-hero-desc{font-size:17px;line-height:1.8;color:var(--txt-2);max-width:760px;}
.cat-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.cat-meta span{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 15px;border-radius:var(--r-pill);
  background:var(--ink-700);border:1px solid var(--line);
  font-size:13px;color:var(--txt-2);font-variant-numeric:tabular-nums;
}
.cat-meta i{color:var(--cat);}
/* ============ 通用卡片 ============ */
.card{
  position:relative;
  background:var(--ink-700);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
  height:100%;
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  border-radius:var(--r-card) var(--r-card) 0 0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-strong);}
.card-icon{
  width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  background:rgba(53,195,255,.13);color:var(--cat);font-size:19px;margin-bottom:18px;
}
.card h3{margin-bottom:10px;}
.card p{font-size:15px;line-height:1.8;}
.card-list{margin-top:14px;display:grid;gap:9px;}
.card-list li{display:flex;gap:9px;font-size:14px;color:var(--txt-2);line-height:1.7;}
.card-list li i{color:var(--brand);font-size:12px;margin-top:7px;flex:0 0 auto;}
/* ============ 步骤清单 ============ */
.steps{display:grid;gap:0;margin-top:8px;}
.step-item{
  display:grid;grid-template-columns:112px 1fr;gap:28px;
  padding:30px 0;border-bottom:1px dashed var(--line);
  align-items:start;
  transition:background .24s var(--ease);
}
.step-item:hover{background:rgba(53,195,255,.05);}
.step-item:last-child{border-bottom:0;}
.step-num{
  font-size:46px;line-height:1;font-weight:700;
  color:var(--brand);font-variant-numeric:tabular-nums;
  letter-spacing:-.03em;
}
.step-num small{display:block;font-size:12px;font-weight:500;color:var(--txt-3);letter-spacing:.14em;margin-top:8px;}
.step-body h3{margin-bottom:8px;}
.step-body p{font-size:15px;margin-bottom:12px;}
.step-note{
  display:inline-flex;align-items:flex-start;gap:9px;
  padding:10px 14px;border-radius:12px;
  background:rgba(255,178,63,.09);
  border:1px solid rgba(255,178,63,.22);
  font-size:13.5px;color:#F4D8A8;line-height:1.7;
}
.step-note i{color:var(--accent);margin-top:5px;flex:0 0 auto;}
/* ============ 双列图文 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.split-media img{border-radius:var(--r-card);box-shadow:var(--shadow);aspect-ratio:16/11;object-fit:cover;width:100%;}
.split-body h2{margin-bottom:14px;}
.split-body p{max-width:44ch;}
.check-list{display:grid;gap:12px;margin-top:22px;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--txt-2);}
.check-list i{color:var(--brand);margin-top:6px;font-size:13px;flex:0 0 auto;}
/* ============ 场景卡 ============ */
.scene-card{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  height:100%;
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow);}
.scene-card .scene-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px;}
.scene-card h3{font-size:17px;}
.scene-card p{font-size:14.5px;margin:0;}
.scene-card .num{font-size:13px;color:var(--txt-3);font-variant-numeric:tabular-nums;}
/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion{border:0;background:transparent;}
.accordion .accordion-item{
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .24s var(--ease);
}
.accordion .accordion-item.is-active{border-color:rgba(23,225,160,.42);background:rgba(16,30,49,.78);}
.accordion .accordion-title{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;
  font-size:16.5px;font-weight:600;color:var(--txt);
  background:transparent;border:0;
  position:relative;
}
.accordion .accordion-title::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;
  background:var(--brand);opacity:0;transition:opacity .24s var(--ease);
}
.accordion .accordion-item.is-active .accordion-title{padding-left:28px;color:#fff;}
.accordion .accordion-item.is-active .accordion-title::before{opacity:1;}
.accordion .accordion-title::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:13px;color:var(--txt-3);transition:transform .24s var(--ease),color .24s var(--ease);
}
.accordion .accordion-item.is-active .accordion-title::after{transform:rotate(180deg);color:var(--brand);}
.accordion .accordion-content{
  padding:0 22px 22px;
  color:var(--txt-2);font-size:15px;line-height:1.85;
  border:0;background:transparent;
}
/* ============ CTA ============ */
.cta-panel{
  position:relative;
  border:1px solid rgba(23,225,160,.4);
  border-radius:24px;
  padding:52px;
  background:
    radial-gradient(600px 260px at 8% 0%,rgba(23,225,160,.12),transparent 66%),
    linear-gradient(160deg,rgba(16,30,49,.92),rgba(10,20,33,.92));
  box-shadow:inset 0 0 60px rgba(23,225,160,.07),var(--shadow);
  display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;
}
.cta-panel h2{max-width:20em;margin-bottom:12px;}
.cta-panel p{max-width:56ch;font-size:15.5px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
/* ============ 交叉导航 ============ */
.cross-nav{display:flex;flex-wrap:wrap;gap:12px;}
.cross-nav a{
  display:inline-flex;align-items:center;gap:9px;
  padding:11px 20px;border-radius:var(--r-pill);
  background:var(--ink-700);border:1px solid var(--line);
  font-size:14px;color:var(--txt-2);
}
.cross-nav a i{font-size:12px;color:var(--cat);}
.cross-nav a:hover{border-color:var(--brand);color:var(--txt);background:rgba(23,225,160,.09);}
/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:rgba(6,12,21,.86);padding:64px 0 28px;margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{font-size:14px;line-height:1.8;color:var(--txt-2);max-width:34ch;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--ink-700);border:1px solid var(--line);color:var(--txt-2);
}
.footer-social a:hover{border-color:var(--brand);color:var(--brand);}
.footer-col h4{margin-bottom:16px;color:#fff;}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul a{font-size:14px;color:var(--txt-2);}
.footer-col ul a:hover{color:var(--brand);}
.subscribe-form{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap;}
.subscribe-form input{
  flex:1 1 160px;min-height:44px;
  padding:11px 16px;border-radius:var(--r-input);
  background:rgba(5,10,18,.7);
  border:1px solid var(--line);
  color:var(--txt);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.subscribe-form input::placeholder{color:var(--txt-3);}
.subscribe-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(23,225,160,.18);}
.form-note{font-size:12.5px;color:var(--txt-3);margin-top:12px;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--txt-3);
}
.footer-bottom a{color:var(--txt-2);}
.footer-bottom a:hover{color:var(--brand);}
/* ============ 浮动返回条 ============ */
.float-bar{
  position:fixed;right:20px;bottom:24px;z-index:50;
  display:flex;gap:10px;
}
.float-bar a{
  width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  background:rgba(10,20,33,.86);border:1px solid var(--line);color:var(--txt-2);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
}
.float-bar a:hover{border-color:var(--brand);color:var(--brand);}
/* ============ 响应式 ============ */
@media screen and (max-width:1023px){
  :root{--gap-section:72px;}
  h1{font-size:32px;}
  h2{font-size:23px;}
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:0;
    padding:88px 22px 120px;
    background:rgba(5,10,18,.97);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    transform:translateY(-12px);
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
    overflow-y:auto;
  }
  .main-nav.is-open{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto;}
  .nav-link{height:56px;justify-content:space-between;font-size:16px;border-bottom:1px solid var(--line);border-radius:0;padding:0 6px;}
  .nav-link i{order:2;}
  .nav-link::after{content:"\f054";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;color:var(--txt-3);margin-left:auto;order:3;}
  .nav-link i{order:1;}
  .nav-toggle{display:grid;place-items:center;}
  .header-actions .btn-sm{display:none;}
  .split{grid-template-columns:1fr;gap:32px;}
  .split.reverse .split-media{order:-1;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-panel{padding:38px 28px;}
}
@media screen and (max-width:767px){
  :root{--gap-section:56px;}
  .container{padding:0 20px;}
  .cat-hero{padding:126px 0 48px;}
  .step-item{grid-template-columns:1fr;gap:12px;}
  .step-num{font-size:36px;}
  .step-num small{display:inline;margin-left:10px;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-panel{flex-direction:column;align-items:stretch;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
}
@media screen and (max-width:519px){
  h1{font-size:28px;line-height:1.32;}
  h2{font-size:21px;}
  .brand-text{font-size:17px;}
  .card{padding:20px;}
  .cat-meta span{width:100%;}
}
@media print{
  .site-header,.float-bar,.cta-panel,.subscribe-form{display:none !important;}
  body{background:#fff;color:#111;}
}

/* roulang page: category3 */
/* ============================================================
   1. 设计变量
   ============================================================ */
:root{
  --ink-900:#050A12;
  --ink-800:#0A1421;
  --ink-700:rgba(16,30,49,.62);
  --brand:#17E1A0;
  --brand-2:#0FB984;
  --accent:#FFB23F;
  --violet:#7C5CFF;
  --coral:#FF6B6B;
  --cyan:#35C3FF;
  --line:rgba(120,180,255,.14);
  --line-soft:rgba(255,255,255,.08);
  --txt:#E6EDF7;
  --txt-2:#93A4BE;
  --txt-3:#5C6B82;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:10px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-hover:0 24px 56px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1280px;
}

/* ============================================================
   2. Reset / 基础
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--txt);
  background:var(--ink-900);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:#fff;}
button,input{font-family:inherit;font-size:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
::selection{background:rgba(23,225,160,.3);color:#fff;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
.num{font-variant-numeric:tabular-nums;}

/* ============================================================
   3. 容器与排版
   ============================================================ */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.container-narrow{max-width:900px;}
h1,h2,h3,h4{letter-spacing:-.01em;line-height:1.28;color:#fff;}
.h1{font-size:40px;font-weight:700;line-height:1.25;letter-spacing:-.02em;}
.h2{font-size:26px;font-weight:700;line-height:1.34;}
.h3{font-size:20px;font-weight:600;line-height:1.4;}
.h4{font-size:17px;font-weight:600;line-height:1.45;}
p{color:var(--txt-2);font-size:15.5px;line-height:1.85;}
.lead{font-size:17px;color:var(--txt-2);max-width:820px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.03em;
  color:var(--brand);
  padding:5px 12px;border-radius:999px;
  background:rgba(23,225,160,.1);
  border:1px solid rgba(23,225,160,.24);
  margin-bottom:18px;
}
.eyebrow i{font-size:11px;}
.section{padding:96px 0;position:relative;}
.section-alt{background:linear-gradient(180deg,rgba(10,20,33,.5),rgba(5,10,18,.2));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{max-width:800px;margin-bottom:46px;}
.sec-head .h2{margin:14px 0 14px;}
.sec-head p{max-width:760px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ============================================================
   4. 按钮 / 标签 / 徽章
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:14px;font-weight:600;line-height:1;
  padding:14px 24px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),filter .24s var(--ease);
}
.btn i{font-size:13px;}
.btn-sm{padding:10px 16px;font-size:13px;}
.btn-primary{
  background:linear-gradient(135deg,#17E1A0,#0FB984);
  color:#05130E;
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 26px rgba(23,225,160,.28);
}
.btn-primary:hover{
  filter:brightness(1.08);color:#05130E;
  box-shadow:0 0 0 1px rgba(23,225,160,.62),0 10px 34px rgba(23,225,160,.5);
}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:var(--line);
  color:var(--txt);
}
.btn-ghost:hover{
  border-color:rgba(23,225,160,.6);
  background:rgba(23,225,160,.08);
  color:#fff;
}
.btn-ghost:active{transform:scale(.98);}
.btn-block{width:100%;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

.chip{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13px;font-weight:500;line-height:1.5;
  padding:5px 12px;border-radius:var(--r-sm);
  background:rgba(53,195,255,.12);
  color:#8FDCFF;
  border:1px solid rgba(53,195,255,.22);
}
.chip-brand{background:rgba(23,225,160,.12);color:#7BF0CB;border-color:rgba(23,225,160,.24);}
.chip-amber{background:rgba(255,178,63,.13);color:#FFCB84;border-color:rgba(255,178,63,.26);}
.chip-violet{background:rgba(124,92,255,.15);color:#B8A6FF;border-color:rgba(124,92,255,.28);}
.chip-coral{background:rgba(255,107,107,.14);color:#FFA3A3;border-color:rgba(255,107,107,.26);}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}

/* ============================================================
   5. 顶部导航
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease),backdrop-filter .22s var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,10,18,.84);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:18px;
  height:76px;transition:height .22s var(--ease);
}
.site-header.is-stuck .header-inner{height:64px;}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;text-decoration:none;
}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#17E1A0,#0FB984);
  color:#05130E;font-size:14px;
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 22px rgba(23,225,160,.28);
}
.brand-text{
  font-size:16.5px;font-weight:700;color:#fff;
  letter-spacing:-.01em;white-space:nowrap;
}
.main-nav{
  display:flex;align-items:center;gap:2px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 11px;border-radius:8px;
  font-size:13.5px;font-weight:500;
  color:var(--txt-2);
  white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link i{font-size:12.5px;opacity:.85;}
.nav-link:hover{color:var(--txt);background:rgba(23,225,160,.08);}
.nav-link.is-active{color:#fff;}
.nav-link.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;
  place-items:center;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  border-radius:12px;color:var(--txt);
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(23,225,160,.55);background:rgba(23,225,160,.1);}
.nav-toggle i{font-size:16px;}
.nav-cta{display:none;}

/* ============================================================
   6. 分类头图条
   ============================================================ */
.cat-hero{
  position:relative;
  padding:158px 0 82px;
  background-image:
    radial-gradient(80% 60% at 85% 5%, rgba(23,225,160,.16), transparent 62%),
    radial-gradient(60% 50% at 5% 95%, rgba(255,178,63,.1), transparent 66%),
    linear-gradient(180deg, rgba(5,10,18,.72) 0%, rgba(5,10,18,.93) 62%, #050A12 100%),
    url('/assets/images/backpic/back-2.webp');
  background-size:cover,cover,cover,cover;
  background-position:center,center,center,center;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(23,225,160,.5),transparent);
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:9px;
  font-size:13px;color:var(--txt-3);margin-bottom:22px;
}
.breadcrumb a{color:var(--txt-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:var(--txt-3);opacity:.6;}
.breadcrumb .current{color:var(--txt-3);}
.cat-hero .h1{max-width:900px;margin:16px 0 18px;}
.cat-hero .lead{max-width:720px;}
.cat-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:30px;padding-top:26px;border-top:1px solid var(--line);
}
.cat-meta .meta-item{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--txt-2);font-weight:500;
}
.cat-meta .meta-item i{color:var(--brand);font-size:12px;}

/* ============================================================
   7. 卡片族
   ============================================================ */
.card{
  position:relative;
  background:var(--ink-700);
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow);
  padding:26px;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:linear-gradient(180deg,rgba(255,255,255,.06),transparent 40%);
}
.card > *{position:relative;z-index:1;}
.card-hover:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(23,225,160,.32);
}
.card-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.card-head .icon-box{
  width:42px;height:42px;flex:0 0 auto;border-radius:12px;
  display:grid;place-items:center;font-size:16px;
  background:rgba(23,225,160,.12);
  color:var(--brand);
  border:1px solid rgba(23,225,160,.24);
}
.card-head .icon-box.alt{background:rgba(255,178,63,.12);color:var(--accent);border-color:rgba(255,178,63,.26);}
.card-head .icon-box.alt2{background:rgba(53,195,255,.12);color:var(--cyan);border-color:rgba(53,195,255,.26);}
.card-head h3{font-size:17px;font-weight:600;}

/* 图文卡 */
.tile-cover{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-md);margin-bottom:18px;
  transition:transform .35s var(--ease);
}
.tile:hover .tile-cover{transform:scale(1.04);}
.tile{overflow:hidden;}
.tile .tile-cover-wrap{overflow:hidden;border-radius:var(--r-md);margin-bottom:18px;}
.tile .tile-cover-wrap .tile-cover{margin-bottom:0;}
.tile p{font-size:14.5px;margin-top:10px;}

/* ============================================================
   8. 双栏对照
   ============================================================ */
.compare-col{
  height:100%;
  display:flex;flex-direction:column;
}
.compare-col .col-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;
  padding:6px 13px;border-radius:999px;
  margin-bottom:20px;align-self:flex-start;
}
.compare-col.before .col-tag{background:rgba(124,92,255,.16);color:#B8A6FF;border:1px solid rgba(124,92,255,.3);}
.compare-col.after .col-tag{background:rgba(23,225,160,.14);color:#7BF0CB;border:1px solid rgba(23,225,160,.3);}
.check-list{display:grid;gap:16px;}
.check-list li{
  display:flex;gap:13px;align-items:flex-start;
  font-size:15px;color:var(--txt-2);line-height:1.75;
}
.check-list li i{
  flex:0 0 auto;margin-top:6px;font-size:12px;
  color:var(--brand);
}
.compare-col.before .check-list li i{color:var(--violet);}
.check-list li strong{color:var(--txt);font-weight:600;display:block;margin-bottom:2px;}

/* ============================================================
   9. 条目对比卡
   ============================================================ */
.spec-card{
  padding:6px 0;
  border-radius:var(--r-lg);
  background:var(--ink-700);
  border:1px solid var(--line-soft);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.spec-row{
  display:grid;
  grid-template-columns:210px 1fr;
  gap:22px;
  align-items:start;
  padding:17px 26px;
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.spec-row:last-child{border-bottom:0;}
.spec-row:hover{
  background:rgba(23,225,160,.06);
  box-shadow:inset 3px 0 0 var(--brand);
}
.spec-key{
  font-size:14px;font-weight:600;color:var(--txt-2);
  display:flex;align-items:center;gap:9px;
}
.spec-key .idx{
  font-variant-numeric:tabular-nums;
  font-size:12px;font-weight:700;
  color:var(--accent);
  min-width:20px;
}
.spec-val{font-size:15px;color:var(--txt);line-height:1.75;}

/* ============================================================
   10. FAQ 折叠
   ============================================================ */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion{
  background:transparent;border:0;margin:0;
}
.accordion .accordion-item{
  background:var(--ink-700) !important;
  border:1px solid var(--line-soft) !important;
  border-radius:var(--r-md) !important;
  margin-bottom:12px;
  overflow:hidden;
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  transition:border-color .22s var(--ease);
}
.accordion .accordion-item:hover{border-color:rgba(23,225,160,.3) !important;}
.accordion .accordion-title{
  display:block;
  background:transparent;
  border:0;
  color:var(--txt);
  font-size:16px;font-weight:600;
  padding:18px 54px 18px 22px;
  position:relative;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.accordion .accordion-title:hover{background:rgba(23,225,160,.05);color:#fff;}
.accordion .accordion-title::before{
  content:"\f078";
  font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:20px;top:50%;
  transform:translateY(-50%);
  font-size:12px;color:var(--brand);
  transition:transform .26s var(--ease);
}
.accordion .accordion-item.is-active .accordion-title{
  color:var(--brand);
  box-shadow:inset 3px 0 0 var(--brand);
}
.accordion .accordion-item.is-active .accordion-title::before{
  transform:translateY(-50%) rotate(180deg);
}
.accordion .accordion-content{
  background:transparent;
  border:0;
  color:var(--txt-2);
  font-size:15px;line-height:1.85;
  padding:0 24px 20px;
}
.accordion .accordion-content p{font-size:15px;}

/* ============================================================
   11. 相关分类 / CTA
   ============================================================ */
.related-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  padding:28px 0;
}
.related-bar .label{
  font-size:13px;font-weight:600;color:var(--txt-3);
  margin-right:4px;
}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;
  font-size:13.5px;font-weight:500;
  color:var(--txt-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:all .24s var(--ease);
}
.pill:hover{
  color:#fff;
  border-color:rgba(23,225,160,.55);
  background:rgba(23,225,160,.1);
  box-shadow:0 0 22px rgba(23,225,160,.22);
  transform:translateY(-2px);
}
.pill i{font-size:11px;color:var(--brand);}

.cta-panel{
  position:relative;
  border-radius:24px;
  padding:46px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:34px;
  align-items:center;
  border:1px solid rgba(23,225,160,.4);
  background:
    radial-gradient(110% 140% at 10% 0%, rgba(23,225,160,.16), transparent 58%),
    linear-gradient(160deg, rgba(16,30,49,.92), rgba(5,10,18,.94));
  box-shadow:0 0 0 1px rgba(23,225,160,.1),inset 0 0 70px rgba(23,225,160,.1),var(--shadow);
  overflow:hidden;
}
.cta-panel .h2{margin-bottom:12px;}
.cta-panel p{max-width:620px;}
.cta-panel .btn-row{justify-content:flex-end;}

/* ============================================================
   12. 页脚
   ============================================================ */
.site-footer{
  margin-top:0;
  padding-top:66px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,20,33,.65),rgba(5,10,18,.98));
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.5fr;
  gap:44px;
  padding-bottom:52px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-desc{font-size:14px;color:var(--txt-2);line-height:1.8;max-width:330px;}
.footer-social{display:flex;gap:10px;margin-top:20px;}
.footer-social a{
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  font-size:14px;color:var(--txt-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  transition:all .24s var(--ease);
}
.footer-social a:hover{
  color:#05130E;background:var(--brand);
  border-color:var(--brand);
  box-shadow:0 0 20px rgba(23,225,160,.4);
}
.footer-col h4{
  font-size:14px;font-weight:600;color:#fff;
  margin-bottom:18px;letter-spacing:.01em;
}
.footer-col ul{display:grid;gap:11px;}
.footer-col ul a{font-size:14px;color:var(--txt-2);}
.footer-col ul a:hover{color:var(--brand);}
.subscribe-form{display:flex;gap:9px;flex-wrap:wrap;margin-top:16px;}
.subscribe-form input{
  flex:1 1 160px;min-width:0;
  background:rgba(5,10,18,.75);
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px 15px;
  color:var(--txt);font-size:14px;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.subscribe-form input::placeholder{color:var(--txt-3);}
.subscribe-form input:focus{
  outline:0;border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(23,225,160,.18);
}
.form-note{font-size:12.5px;color:var(--txt-3);margin-top:12px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding:22px 0 30px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--txt-2);
}
.footer-bottom a{color:var(--txt-2);}
.footer-bottom a:hover{color:var(--brand);}

/* ============================================================
   13. 响应式
   ============================================================ */
@media(max-width:1180px){
  .nav-link{padding:9px 8px;font-size:13px;}
  .header-actions .btn-ghost{display:none;}
}
@media(max-width:1023px){
  .h1,.cat-hero .h1{font-size:32px;line-height:1.3;}
  .h2{font-size:23px;}
  .section{padding:72px 0;}
  .cat-hero{padding:132px 0 64px;}
  .container{padding-left:22px;padding-right:22px;}
  .main-nav{
    position:fixed;top:0;left:0;right:0;bottom:0;
    display:flex;flex-direction:column;align-items:stretch;gap:6px;
    padding:100px 22px 32px;
    background:rgba(5,10,18,.97);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    transform:translateX(100%);
    opacity:0;pointer-events:none;
    transition:transform .32s var(--ease),opacity .32s var(--ease);
    z-index:70;overflow-y:auto;
  }
  .main-nav.is-open{transform:none;opacity:1;pointer-events:auto;}
  .nav-link{
    height:56px;font-size:16px;gap:12px;
    padding:0 16px;border-radius:12px;
    justify-content:flex-start;
  }
  .nav-link i{font-size:15px;}
  .nav-link.is-active{background:rgba(23,225,160,.1);color:var(--brand);}
  .nav-link.is-active::after{display:none;}
  .nav-toggle{display:grid;}
  .nav-cta{display:block;margin-top:18px;padding-top:18px;border-top:1px solid var(--line);}
  .nav-cta .btn{width:100%;}
  .spec-row{grid-template-columns:1fr;gap:6px;padding:16px 20px;}
  .cta-panel{grid-template-columns:1fr;padding:34px 26px;gap:24px;}
  .cta-panel .btn-row{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-desc{max-width:none;}
}
@media(max-width:767px){
  .header-actions .btn-sm{display:none;}
  .header-inner{gap:12px;}
}
@media(max-width:639px){
  .h1,.cat-hero .h1{font-size:27px;line-height:1.32;}
  .h2{font-size:21px;line-height:1.36;}
  .h3{font-size:18px;}
  .section{padding:56px 0;}
  .cat-hero{padding:116px 0 52px;}
  .container{padding-left:20px;padding-right:20px;}
  .sec-head{margin-bottom:32px;}
  .card{padding:20px;border-radius:16px;}
  .lead{font-size:15.5px;}
  .cta-panel{padding:28px 20px;border-radius:20px;}
  .btn-row .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:38px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .brand-text{font-size:15.5px;}
  .cat-meta{gap:10px;}
}

/* ============================================================
   14. 无障碍 / 打印
   ============================================================ */
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important;}
}
@media print{
  .site-header,.cta-panel,.subscribe-form,.nav-toggle{display:none !important;}
  body{background:#fff;color:#111;}
  .card,.spec-card{border:1px solid #ddd;box-shadow:none;background:#fff;}
  p,h1,h2,h3{color:#111;}
}

/* roulang page: category4 */
/* ===== 设计变量 ===== */
:root{
  --ink-900:#050A12;
  --ink-800:#0A1421;
  --ink-700:rgba(16,30,49,.62);
  --brand:#17E1A0;
  --brand-2:#0FB984;
  --accent:#FFB23F;
  --violet:#7C5CFF;
  --coral:#FF6B6B;
  --sky:#35C3FF;
  --line:rgba(120,180,255,.14);
  --txt:#E6EDF7;
  --txt-2:#93A4BE;
  --txt-3:#5C6B82;
  --r-card:18px;
  --r-sm:10px;
  --r-pill:999px;
  --r-input:14px;
  --shadow:0 18px 40px rgba(0,0,0,.45);
  --shadow-hover:0 24px 56px rgba(0,0,0,.55);
  --container:1280px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --ease-soft:cubic-bezier(.25,.8,.35,1);
}
/* ===== 基础 reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  font-family:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--txt);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(900px 520px at 12% -8%, rgba(23,225,160,.10), transparent 62%),
    radial-gradient(760px 480px at 92% 4%, rgba(255,178,63,.07), transparent 60%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden}
img{max-width:100%;height:auto;display:block;border-radius:14px}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease)}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0 0 14px;color:var(--txt);font-weight:700;letter-spacing:-0.01em}
h1{font-size:40px;line-height:1.25;letter-spacing:-0.02em}
h2{font-size:26px;line-height:1.34}
h3{font-size:20px;line-height:1.4;font-weight:600}
h4{font-size:17px;line-height:1.45;font-weight:600}
p{margin:0 0 14px;color:var(--txt-2);font-size:16px;line-height:1.85}
ul,ol{margin:0 0 14px;padding:0}
li{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:rgba(23,225,160,.28);color:#fff}
/* ===== 容器 ===== */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:820px;margin-bottom:40px}
.section-head p{max-width:760px;margin-bottom:0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--brand);text-transform:none;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px;display:inline-block}
/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;
  border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .24s var(--ease),background-color .24s var(--ease),border-color .24s var(--ease),filter .24s var(--ease),color .24s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);
  color:#05130E;
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 26px rgba(23,225,160,.28);
}
.btn-primary:hover{
  color:#05130E;filter:brightness(1.08);
  box-shadow:0 0 0 1px rgba(23,225,160,.6),0 8px 34px rgba(23,225,160,.42);
  transform:translateY(-1px);
}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:var(--line);
  color:var(--txt);
}
.btn-ghost:hover{
  border-color:rgba(23,225,160,.55);
  background:rgba(23,225,160,.09);
  color:var(--brand);
  transform:translateY(-1px);
}
.btn-sm{min-height:38px;padding:9px 16px;font-size:14px}
.btn-block{width:100%}
/* ===== 徽章 / 标签 ===== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;line-height:1.5;
  padding:4px 10px;border-radius:var(--r-sm);
  border:1px solid transparent;
}
.badge-brand{background:rgba(23,225,160,.13);color:var(--brand);border-color:rgba(23,225,160,.28)}
.badge-accent{background:rgba(255,178,63,.13);color:var(--accent);border-color:rgba(255,178,63,.28)}
.badge-coral{background:rgba(255,107,107,.13);color:var(--coral);border-color:rgba(255,107,107,.28)}
.badge-violet{background:rgba(124,92,255,.14);color:#A795FF;border-color:rgba(124,92,255,.3)}
.badge-sky{background:rgba(53,195,255,.13);color:var(--sky);border-color:rgba(53,195,255,.28)}
/* ===== 头部导航 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  border-bottom:1px solid transparent;
  transition:background-color .22s var(--ease),border-color .22s var(--ease),backdrop-filter .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,10,18,.84);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;height:74px;
}
.brand{display:inline-flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(23,225,160,.95),rgba(15,185,132,.75));
  color:#05130E;font-size:16px;
  box-shadow:0 0 0 1px rgba(23,225,160,.4),0 8px 22px rgba(23,225,160,.26);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-0.01em;color:#fff;white-space:nowrap}
.brand:hover .brand-text{color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:4px;flex:1 1 auto;justify-content:center}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 12px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--txt-2);
  white-space:nowrap;
  transition:color .2s var(--ease),background-color .2s var(--ease);
}
.nav-link i{font-size:13px;opacity:.85}
.nav-link:hover{color:var(--txt);background:rgba(23,225,160,.09)}
.nav-link.is-active{color:var(--brand)}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  border-radius:2px;background:var(--brand);
  box-shadow:0 0 12px rgba(23,225,160,.7);
}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);color:var(--txt);
  font-size:17px;cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(23,225,160,.5);color:var(--brand)}
.nav-cta-mobile{display:none}
/* ===== 页头横幅 ===== */
.page-hero{
  position:relative;overflow:hidden;
  padding:154px 0 76px;
  border-bottom:1px solid var(--line);
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.34;
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(700px 380px at 18% 12%, rgba(23,225,160,.14), transparent 62%),
    linear-gradient(180deg,rgba(5,10,18,.9) 0%,rgba(5,10,18,.82) 46%,var(--ink-900) 100%);
}
.page-hero-inner{position:relative;z-index:2;max-width:860px}
.breadcrumb{
  display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  font-size:13px;font-weight:500;color:var(--txt-3);margin-bottom:20px;
}
.breadcrumb a{color:var(--txt-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .current{color:var(--txt-3)}
.page-hero h1{margin:16px 0 16px;max-width:820px}
.page-hero-desc{max-width:720px;font-size:16.5px;color:var(--txt-2);margin-bottom:24px}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px 26px}
.hero-meta span{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:500;color:var(--txt-2);
}
.hero-meta i{color:var(--brand);font-size:12px}
/* ===== 瀑布流卡片 ===== */
.masonry{column-count:3;column-gap:22px}
.masonry > .tile{break-inside:avoid;-webkit-column-break-inside:avoid;page-break-inside:avoid;margin-bottom:22px}
.tile{
  position:relative;display:block;
  background:var(--ink-700);
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--r-card);
  padding:22px;
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.tile::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.16),transparent);
  border-radius:var(--r-card) var(--r-card) 0 0;
}
.tile:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(23,225,160,.32);
}
.tile-head{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.tile-icon{
  width:38px;height:38px;border-radius:11px;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;
  background:rgba(23,225,160,.12);color:var(--brand);
  border:1px solid rgba(23,225,160,.24);
}
.tile-icon.is-coral{background:rgba(255,107,107,.12);color:var(--coral);border-color:rgba(255,107,107,.24)}
.tile-icon.is-accent{background:rgba(255,178,63,.12);color:var(--accent);border-color:rgba(255,178,63,.24)}
.tile-icon.is-sky{background:rgba(53,195,255,.12);color:var(--sky);border-color:rgba(53,195,255,.24)}
.tile h3{margin-bottom:10px;font-size:18px}
.tile p{font-size:14.5px;line-height:1.8;margin-bottom:14px;color:var(--txt-2)}
.tile-media{margin:-6px 0 16px;border-radius:14px;overflow:hidden}
.tile-media img{width:100%;height:158px;object-fit:cover;border-radius:14px}
.tile-actions{display:flex;align-items:center;gap:8px;padding-top:12px;border-top:1px solid var(--line)}
.tile-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;font-weight:600;color:var(--brand);
}
.tile-link i{transition:transform .22s var(--ease)}
.tile-link:hover i{transform:translateX(4px)}
.check-list li{
  position:relative;padding-left:20px;margin-bottom:8px;
  font-size:14px;color:var(--txt-2);line-height:1.75;
}
.check-list li::before{
  content:"";position:absolute;left:0;top:11px;
  width:7px;height:7px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 10px rgba(23,225,160,.7);
}
/* ===== 清单区 ===== */
.prepare-grid{align-items:center}
.prepare-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow);
}
.prepare-media img{width:100%;height:100%;min-height:320px;object-fit:cover;border-radius:0}
.prepare-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,18,.05),rgba(5,10,18,.72));
}
.prepare-media .media-tag{
  position:absolute;left:18px;bottom:18px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 13px;border-radius:var(--r-pill);
  background:rgba(5,10,18,.72);border:1px solid var(--line);
  backdrop-filter:blur(10px);font-size:13px;font-weight:600;color:var(--txt);
}
.prepare-media .media-tag i{color:var(--brand)}
.step-list{counter-reset:prep;margin-top:18px}
.step-list li{
  position:relative;padding:16px 0 16px 56px;
  border-bottom:1px dashed var(--line);
}
.step-list li:last-child{border-bottom:0}
.step-list li::before{
  counter-increment:prep;content:counter(prep,decimal-leading-zero);
  position:absolute;left:0;top:16px;
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;
  color:var(--brand);background:rgba(23,225,160,.1);
  border:1px solid rgba(23,225,160,.24);
}
.step-list h4{margin-bottom:6px;font-size:16.5px}
.step-list p{margin-bottom:0;font-size:14.5px}
/* ===== FAQ 折叠 ===== */
.faq-accordion{background:transparent;border:0;margin:0}
.faq-accordion .accordion-item{
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:12px;
  background:rgba(16,30,49,.5);
  overflow:hidden;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.faq-accordion .accordion-item:hover{border-color:rgba(23,225,160,.3)}
.faq-accordion .accordion-item.is-active{
  border-color:rgba(23,225,160,.4);
  box-shadow:inset 3px 0 0 var(--brand);
}
.faq-accordion .accordion-title{
  border:0;background:transparent;
  padding:18px 56px 18px 24px;
  font-size:16px;font-weight:600;color:var(--txt);
  line-height:1.6;
}
.faq-accordion .accordion-title:hover{color:var(--brand);background:rgba(23,225,160,.04)}
.faq-accordion .accordion-title::before{
  right:22px;color:var(--brand);font-size:15px;line-height:1;
}
.faq-accordion .accordion-content{
  border:0;background:transparent;
  padding:0 24px 20px 24px;
}
.faq-accordion .accordion-content p{
  font-size:15px;line-height:1.85;color:var(--txt-2);margin-bottom:0;
}
.faq-accordion .accordion-item.is-active > .accordion-title{color:var(--brand)}
/* ===== 交叉分类导航 ===== */
.cross-nav{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:8px;
}
.cross-pill{
  display:inline-flex;align-items:center;gap:9px;
  padding:11px 18px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  font-size:14px;font-weight:600;color:var(--txt-2);
  transition:border-color .22s var(--ease),color .22s var(--ease),background-color .22s var(--ease),transform .22s var(--ease);
}
.cross-pill i{font-size:13px;color:var(--brand)}
.cross-pill:hover{
  color:var(--txt);border-color:rgba(23,225,160,.5);
  background:rgba(23,225,160,.08);transform:translateY(-2px);
}
/* ===== CTA 面板 ===== */
.cta-box{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:34px;flex-wrap:wrap;
  padding:44px 46px;
  border-radius:24px;
  border:1px solid rgba(23,225,160,.42);
  background:
    radial-gradient(520px 260px at 8% 0%, rgba(23,225,160,.16), transparent 66%),
    linear-gradient(135deg,rgba(16,30,49,.9),rgba(10,20,33,.78));
  box-shadow:0 24px 60px rgba(0,0,0,.5),inset 0 0 42px rgba(23,225,160,.06);
}
.cta-copy{max-width:620px}
.cta-copy h2{margin:14px 0 12px;font-size:26px}
.cta-copy p{margin-bottom:0;font-size:15px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
/* ===== 页脚 ===== */
.site-footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,20,33,.7),rgba(5,10,18,.95));
  padding-top:64px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:46px;
}
.footer-desc{font-size:14px;line-height:1.8;color:var(--txt-2);margin:16px 0 18px;max-width:340px}
.footer-social{display:flex;gap:10px}
.footer-social a{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  color:var(--txt-2);font-size:15px;
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.footer-social a:hover{border-color:rgba(23,225,160,.5);color:var(--brand);background:rgba(23,225,160,.08)}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--txt)}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:var(--txt-2)}
.footer-col ul li a:hover{color:var(--brand)}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap}
.subscribe-form input{
  flex:1 1 150px;min-width:0;min-height:44px;
  padding:11px 15px;border-radius:var(--r-input);
  background:rgba(5,10,18,.6);
  border:1px solid var(--line);
  color:var(--txt);font-size:14px;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.subscribe-form input::placeholder{color:var(--txt-3)}
.subscribe-form input:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(23,225,160,.16);
}
.subscribe-form .btn{flex:0 0 auto}
.form-note{font-size:12.5px;color:var(--txt-3);margin:10px 0 0}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;
  align-items:center;justify-content:space-between;
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  font-size:13px;color:var(--txt-2);
}
.footer-bottom a{color:var(--txt-2)}
.footer-bottom a:hover{color:var(--brand)}
/* ===== 响应式 ===== */
@media (max-width:1279px){
  .nav-link{padding:8px 9px;font-size:13.5px;gap:6px}
  .brand-text{font-size:16px}
}
@media (max-width:1023px){
  h1{font-size:32px}
  h2{font-size:23px}
  .section{padding:72px 0}
  .header-inner{height:64px}
  .site-header{background:rgba(5,10,18,.9);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom-color:var(--line)}
  .nav-toggle{display:inline-flex}
  .header-actions .btn{display:none}
  .main-nav{
    position:fixed;top:64px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:2px;
    padding:16px 20px 28px;
    background:rgba(5,10,18,.98);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    border-top:1px solid var(--line);
    overflow-y:auto;
    transform:translateX(100%);
    transition:transform .3s var(--ease);
    z-index:59;
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-link{
    min-height:56px;padding:0 16px;font-size:16px;gap:12px;
    border-radius:12px;border-bottom:1px solid rgba(120,180,255,.08);
    color:var(--txt);
  }
  .nav-link i{font-size:15px;color:var(--brand)}
  .nav-link.is-active::after{display:none}
  .nav-link.is-active{background:rgba(23,225,160,.1);color:var(--brand)}
  .nav-cta-mobile{
    display:inline-flex;margin-top:20px;min-height:50px;
    justify-content:center;width:100%;
  }
  .page-hero{padding:118px 0 62px}
  .masonry{column-count:2;column-gap:18px}
  .masonry > .tile{margin-bottom:18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .cta-box{padding:34px 30px}
  .site-footer{margin-top:72px}
}
@media (max-width:767px){
  .prepare-media img{min-height:240px}
  .cross-nav{gap:10px}
  .cross-pill{font-size:13px;padding:10px 15px}
}
@media (max-width:639px){
  .container{padding:0 20px}
  h1{font-size:28px;line-height:1.32}
  h2{font-size:21px}
  h3{font-size:18px}
  body{font-size:15.5px}
  p{font-size:15px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .page-hero{padding:104px 0 54px}
  .masonry{column-count:1}
  .masonry > .tile{margin-bottom:16px}
  .tile{padding:18px}
  .tile-media img{height:150px}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:34px}
  .cta-box{padding:28px 22px;border-radius:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .site-footer{margin-top:56px;padding-top:48px}
}
@media print{
  .site-header,.cta-box,.subscribe-form{display:none}
  body{background:#fff;color:#000}
}

/* roulang page: category5 */
/* ==========================================================================
   1. 设计变量
   ========================================================================== */
:root{
  --ink-900:#050A12;
  --ink-800:#0A1421;
  --ink-700:rgba(16,30,49,.62);
  --brand:#17E1A0;
  --brand-dim:#0FB984;
  --accent:#FFB23F;
  --purple:#7C5CFF;
  --coral:#FF6B6B;
  --cyan:#35C3FF;
  --line:rgba(120,180,255,.14);
  --line-strong:rgba(120,180,255,.28);
  --txt:#E6EDF7;
  --txt-2:#93A4BE;
  --txt-3:#5C6B82;
  --radius-xl:22px;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-1:0 18px 40px rgba(0,0,0,.45);
  --shadow-2:0 24px 56px rgba(0,0,0,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1280px;
  --section-y:96px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}

/* ==========================================================================
   2. Reset / 基础
   ========================================================================== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background:var(--ink-900);
  color:var(--txt);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(720px 420px at 82% 6%, rgba(23,225,160,.10), transparent 68%),
    radial-gradient(640px 380px at 8% 28%, rgba(255,178,63,.07), transparent 70%);
}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-md);}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);}
a:hover{color:#fff;}
p{margin:0 0 1.1em;}
ul,ol{margin:0 0 1.1em;padding-left:1.15em;}
li{margin-bottom:.45em;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0 0 .6em;color:#fff;letter-spacing:-.01em;}
h1{font-size:40px;line-height:1.25;font-weight:700;letter-spacing:-.02em;}
h2{font-size:26px;line-height:1.34;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
h4{font-size:17px;line-height:1.4;font-weight:600;}
::selection{background:rgba(23,225,160,.28);color:#fff;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px;}

/* 覆盖 Foundation 默认味道 */
body,h1,h2,h3,h4,h5,h6,p,li,td,th,label,input,select,textarea,button{font-family:var(--font);}
a:not(.btn){background:transparent;}
.accordion,.tabs,.menu{background:transparent;}
.button,button{box-shadow:none;}

/* ==========================================================================
   3. 容器与栅格
   ========================================================================== */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
  position:relative;
  z-index:1;
}
.section{padding:var(--section-y) 0;position:relative;}
.section--tight{padding:64px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:28px;
  margin-bottom:42px;
  flex-wrap:wrap;
}
.section-head .eyebrow{margin-bottom:10px;}
.section-head p{color:var(--txt-2);margin:0;max-width:660px;}
.grid-x > .cell{padding-left:0;padding-right:0;}
.row-gap{row-gap:22px;}
.grid-margin-x{margin-left:-11px;margin-right:-11px;}
.grid-margin-x > .cell{padding-left:11px;padding-right:11px;}

/* ==========================================================================
   4. 通用元素：眉标 / 徽章 / 按钮 / 标签
   ========================================================================== */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--brand);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),transparent);
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  font-weight:500;
  line-height:1.5;
  padding:4px 11px;
  border-radius:var(--radius-sm);
  background:rgba(23,225,160,.12);
  color:var(--brand);
  border:1px solid rgba(23,225,160,.24);
  white-space:nowrap;
}
.badge--amber{background:rgba(255,178,63,.12);color:var(--accent);border-color:rgba(255,178,63,.26);}
.badge--purple{background:rgba(124,92,255,.14);color:#A995FF;border-color:rgba(124,92,255,.3);}
.badge--cyan{background:rgba(53,195,255,.12);color:var(--cyan);border-color:rgba(53,195,255,.26);}
.badge--coral{background:rgba(255,107,107,.12);color:var(--coral);border-color:rgba(255,107,107,.26);}
.badge--muted{background:rgba(147,164,190,.1);color:var(--txt-2);border-color:var(--line);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 24px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease),filter .24s var(--ease);
}
.btn i{font-size:.92em;}
.btn-primary{
  background:linear-gradient(135deg,#17E1A0,#0FB984);
  color:#05130E;
  box-shadow:0 0 0 1px rgba(23,225,160,.45),0 8px 26px rgba(23,225,160,.28);
}
.btn-primary:hover{
  filter:brightness(1.08);
  color:#05130E;
  box-shadow:0 0 0 1px rgba(23,225,160,.6),0 10px 34px rgba(23,225,160,.45);
}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:rgba(16,30,49,.55);
  border-color:var(--line);
  color:var(--txt);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:var(--brand);background:rgba(23,225,160,.09);color:#fff;}
.btn-ghost:active{transform:scale(.98);}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn:focus-visible{outline:none;box-shadow:0 0 0 2px var(--ink-900),0 0 0 4px var(--brand);}

.tag-list{display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none;}
.tag-list li{margin:0;}
.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  font-weight:500;
  color:var(--txt-2);
  padding:6px 13px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(16,30,49,.5);
  transition:all .2s var(--ease);
}
.tag:hover{color:#fff;border-color:var(--line-strong);background:rgba(23,225,160,.08);}
.tag i{color:var(--brand);font-size:12px;}

/* ==========================================================================
   5. 顶部导航
   ========================================================================== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:200;
  padding:14px 0;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .2s var(--ease),backdrop-filter .2s var(--ease),border-color .2s var(--ease),padding .2s var(--ease);
}
.site-header.is-scrolled{
  padding:9px 0;
  background:rgba(6,12,22,.84);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:52px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:11px;
  color:#fff;
  font-weight:700;
  font-size:17px;
  letter-spacing:-.01em;
  flex:0 0 auto;
}
.brand:hover{color:#fff;}
.brand-mark{
  width:34px;height:34px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:11px;
  font-size:15px;
  color:#05130E;
  background:linear-gradient(135deg,#17E1A0,#0FB984);
  box-shadow:0 0 0 1px rgba(23,225,160,.5),0 6px 18px rgba(23,225,160,.32);
}
.brand-text{white-space:nowrap;}
.main-nav{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:auto;
  flex-wrap:nowrap;
}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:9px 12px;
  border-radius:8px;
  font-size:14px;
  font-weight:500;
  color:var(--txt-2);
  position:relative;
  white-space:nowrap;
}
.nav-link i{font-size:13px;opacity:.85;}
.nav-link:hover{color:#fff;background:rgba(120,180,255,.09);}
.nav-link.is-active{color:#fff;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:3px;
  height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),rgba(23,225,160,.25));
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(16,30,49,.6);
  color:var(--txt);
  font-size:17px;
  cursor:pointer;
  transition:all .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--brand);color:#fff;}

/* ==========================================================================
   6. 分类头图条
   ========================================================================== */
.cat-hero{
  position:relative;
  padding:168px 0 74px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.cat-hero__bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  opacity:.42;
  transform:scale(1.03);
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(5,10,18,.86) 0%,rgba(5,10,18,.68) 45%,rgba(5,10,18,.96) 100%),
    radial-gradient(620px 320px at 78% 30%, rgba(23,225,160,.16), transparent 70%),
    radial-gradient(520px 300px at 12% 76%, rgba(255,178,63,.10), transparent 72%);
}
.cat-hero .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--txt-2);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--txt-2);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb span.sep{color:var(--txt-3);}
.breadcrumb .current{color:var(--txt-2);}
.cat-hero h1{max-width:900px;margin-bottom:18px;}
.cat-hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,#17E1A0,#7FE9C6);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.cat-hero__lead{
  max-width:760px;
  color:var(--txt-2);
  font-size:17px;
  margin-bottom:26px;
}
.cat-hero__meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px 22px;
  font-size:13px;
  color:var(--txt-2);
}
.cat-hero__meta b{
  color:#fff;
  font-weight:600;
  font-variant-numeric:tabular-nums;
}
.cat-hero__meta .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px rgba(23,225,160,.9);}

/* ==========================================================================
   7. 概览卡（数据 / 卖点）
   ========================================================================== */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  margin-top:38px;
}
.stat-strip__item{
  background:rgba(10,20,33,.86);
  padding:20px 22px;
}
.stat-strip__num{
  font-size:26px;
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
  margin-bottom:4px;
}
.stat-strip__label{font-size:13px;color:var(--txt-2);line-height:1.5;}

.card{
  position:relative;
  height:100%;
  padding:24px;
  border-radius:var(--radius-lg);
  border:1px solid rgba(255,255,255,.08);
  background:
    linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,0) 42%),
    var(--ink-700);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-1);
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(23,225,160,.28);}
.card__icon{
  width:44px;height:44px;
  border-radius:13px;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;
  margin-bottom:16px;
  background:rgba(23,225,160,.12);
  color:var(--brand);
  border:1px solid rgba(23,225,160,.24);
}
.card__icon--amber{background:rgba(255,178,63,.12);color:var(--accent);border-color:rgba(255,178,63,.24);}
.card__icon--purple{background:rgba(124,92,255,.14);color:#A995FF;border-color:rgba(124,92,255,.26);}
.card__icon--cyan{background:rgba(53,195,255,.12);color:var(--cyan);border-color:rgba(53,195,255,.24);}
.card h3{margin-bottom:10px;}
.card p{color:var(--txt-2);font-size:14.5px;margin:0;}
.card__foot{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;margin-top:18px;padding-top:16px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--txt-2);
}

/* 适配卡片（图文） */
.device-card{
  height:100%;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line);
  background:rgba(10,20,33,.72);
  box-shadow:var(--shadow-1);
  display:flex;
  flex-direction:column;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease);
}
.device-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(23,225,160,.28);}
.device-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;}
.device-card__media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s var(--ease);}
.device-card:hover .device-card__media img{transform:scale(1.04);}
.device-card__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,18,.15),rgba(5,10,18,.78));
}
.device-card__badge{position:absolute;left:14px;top:14px;z-index:2;}
.device-card__body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column;}
.device-card__body h3{font-size:17px;margin-bottom:8px;}
.device-card__body p{color:var(--txt-2);font-size:14px;margin:0;}
.device-card__body .card__foot{margin-top:auto;}

/* ==========================================================================
   8. 竖向时间线
   ========================================================================== */
.timeline-wrap{
  border-radius:var(--radius-xl);
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(16,30,49,.6),rgba(10,20,33,.5));
  padding:52px 46px;
  box-shadow:var(--shadow-1);
}
.timeline{position:relative;list-style:none;margin:0;padding:0;}
.timeline::before{
  content:"";
  position:absolute;
  left:23px;top:10px;bottom:10px;
  width:1px;
  background:linear-gradient(180deg,rgba(23,225,160,.55),rgba(120,180,255,.14) 60%,rgba(120,180,255,0));
}
.timeline > li{
  position:relative;
  padding-left:76px;
  margin:0 0 34px;
}
.timeline > li:last-child{margin-bottom:0;}
.tl-dot{
  position:absolute;
  left:12px;top:6px;
  width:23px;height:23px;
  border-radius:50%;
  background:radial-gradient(circle at 35% 35%,#7FF3CB,#17E1A0 58%,#0B8F62);
  box-shadow:0 0 0 5px rgba(23,225,160,.12),0 0 20px rgba(23,225,160,.55);
}
.tl-dot span{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:700;color:#05130E;
  font-variant-numeric:tabular-nums;
}
.tl-body{
  padding:18px 22px;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  background:rgba(6,12,22,.55);
  transition:border-color .24s var(--ease),transform .24s var(--ease),background .24s var(--ease);
}
.timeline > li:hover .tl-body{border-color:rgba(23,225,160,.3);transform:translateX(4px);background:rgba(10,20,33,.7);}
.tl-body h3{font-size:17px;margin-bottom:8px;}
.tl-body p{font-size:14.5px;color:var(--txt-2);margin:0 0 12px;}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;}

/* ==========================================================================
   9. 自检清单
   ========================================================================== */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 26px;margin:0;padding:0;list-style:none;}
.check-grid li{
  display:flex;gap:12px;
  padding:14px 16px;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  background:rgba(10,20,33,.55);
  font-size:14.5px;
  color:var(--txt-2);
  margin:0;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.check-grid li:hover{border-color:rgba(23,225,160,.3);background:rgba(23,225,160,.05);}
.check-grid i{color:var(--brand);margin-top:6px;font-size:13px;flex:0 0 auto;}
.check-grid strong{color:#fff;font-weight:600;}

/* ==========================================================================
   10. FAQ 手风琴
   ========================================================================== */
.accordion{border:none;background:transparent;margin:0;}
.accordion .accordion-item{
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  background:rgba(10,20,33,.6);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.accordion .accordion-item.is-active{border-color:rgba(23,225,160,.34);background:rgba(12,24,38,.82);}
.accordion .accordion-title{
  display:flex;align-items:center;gap:14px;
  padding:18px 22px 18px 20px;
  font-size:16px;font-weight:600;
  color:var(--txt);
  border:none;
  border-left:3px solid transparent;
  background:transparent;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.accordion .accordion-title:hover{background:rgba(23,225,160,.06);color:#fff;}
.accordion .accordion-item.is-active .accordion-title{border-left-color:var(--brand);color:#fff;}
.accordion .accordion-title::before{display:none;}
.accordion .accordion-title::after{
  content:"\f067";
  font-family:"Font Awesome 6 Free";
  font-weight:900;
  margin-left:auto;
  font-size:12px;
  color:var(--txt-2);
  transition:transform .2s var(--ease),color .2s var(--ease);
}
.accordion .accordion-item.is-active .accordion-title::after{content:"\f068";color:var(--brand);}
.accordion .accordion-content{
  padding:0 22px 20px 20px;
  border:none;
  background:transparent;
  color:var(--txt-2);
  font-size:14.5px;
  line-height:1.85;
}
.accordion .accordion-content p:last-child{margin-bottom:0;}

/* ==========================================================================
   11. 相关分类交叉导航
   ========================================================================== */
.cross-nav{
  display:flex;flex-wrap:wrap;gap:12px;
  margin:0;padding:0;list-style:none;
}
.cross-nav li{margin:0;}
.pill{
  display:inline-flex;align-items:center;gap:9px;
  padding:11px 20px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(16,30,49,.55);
  color:var(--txt);
  font-size:14px;font-weight:500;
  transition:all .22s var(--ease);
}
.pill i{color:var(--brand);font-size:13px;}
.pill:hover{border-color:var(--brand);background:rgba(23,225,160,.1);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(23,225,160,.16);}

/* ==========================================================================
   12. 转化 CTA
   ========================================================================== */
.cta-panel{
  position:relative;
  border-radius:var(--radius-xl);
  border:1px solid rgba(23,225,160,.42);
  background:
    radial-gradient(560px 300px at 88% 20%, rgba(23,225,160,.16), transparent 70%),
    linear-gradient(135deg,rgba(10,20,33,.95),rgba(6,12,22,.95));
  padding:48px 46px;
  box-shadow:0 0 0 1px rgba(23,225,160,.08) inset,0 24px 60px rgba(0,0,0,.5);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:34px;
  flex-wrap:wrap;
  overflow:hidden;
}
.cta-panel h2{margin-bottom:12px;}
.cta-panel p{color:var(--txt-2);margin:0;max-width:620px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ==========================================================================
   13. 页脚
   ========================================================================== */
.site-footer{
  margin-top:20px;
  padding:70px 0 0;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,20,33,.5),rgba(5,10,18,.95));
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:40px;
  padding-bottom:52px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--txt-2);line-height:1.8;margin-bottom:18px;max-width:340px;}
.footer-social{display:flex;gap:10px;}
.footer-social a{
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:rgba(16,30,49,.55);
  color:var(--txt-2);
  font-size:14px;
}
.footer-social a:hover{color:#05130E;background:linear-gradient(135deg,#17E1A0,#0FB984);border-color:transparent;transform:translateY(-2px);}
.footer-col h4{font-size:15px;margin-bottom:18px;color:#fff;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:11px;}
.footer-col a{font-size:14px;color:var(--txt-2);}
.footer-col a:hover{color:var(--brand);}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap;}
.subscribe-form input{
  flex:1 1 150px;
  min-height:44px;
  padding:0 16px;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  background:rgba(6,12,22,.7);
  color:var(--txt);
  font-size:14px;
  margin:0;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.subscribe-form input::placeholder{color:var(--txt-3);}
.subscribe-form input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(23,225,160,.16);
  background:rgba(6,12,22,.9);
}
.subscribe-form .btn{flex:0 0 auto;}
.form-note{font-size:12.5px;color:var(--txt-3);margin:12px 0 0;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--txt-2);
}
.footer-bottom a{color:var(--txt-2);}
.footer-bottom a:hover{color:var(--brand);}

/* ==========================================================================
   14. 动效与无障碍
   ========================================================================== */
.reveal-up{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal-up.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal-up{opacity:1;transform:none;}
}
.skip-link{
  position:absolute;left:-9999px;top:0;
  background:var(--brand);color:#05130E;padding:10px 18px;border-radius:0 0 12px 0;z-index:999;
}
.skip-link:focus{left:0;}

/* ==========================================================================
   15. 响应式
   ========================================================================== */
@media (max-width:1439px){
  .container{max-width:1180px;}
}
@media (max-width:1023px){
  :root{--section-y:72px;}
  h1{font-size:32px;}
  h2{font-size:23px;}
  .main-nav{
    position:fixed;
    inset:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:88px 20px 130px;
    margin:0;
    background:rgba(5,10,18,.97);
    backdrop-filter:blur(18px);
    overflow-y:auto;
    transform:translateX(100%);
    opacity:0;
    pointer-events:none;
    transition:transform .28s var(--ease),opacity .28s var(--ease);
    z-index:180;
  }
  .main-nav.is-open{transform:none;opacity:1;pointer-events:auto;}
  .nav-link{
    min-height:56px;
    padding:0 18px;
    font-size:16px;
    border-bottom:1px solid var(--line);
    border-radius:0;
    justify-content:flex-start;
  }
  .nav-link::after{display:none;}
  .nav-link.is-active{color:var(--brand);}
  .nav-link.is-active::after{
    display:block;left:0;right:auto;top:50%;
    width:3px;height:24px;transform:translateY(-50%);
    bottom:auto;
  }
  .header-actions .btn-ghost{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;z-index:210;}
  .cat-hero{padding:132px 0 56px;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .timeline-wrap{padding:36px 26px;}
  .check-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .cta-panel{padding:36px 26px;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .grid-margin-x{margin-left:-9px;margin-right:-9px;}
  .grid-margin-x > .cell{padding-left:9px;padding-right:9px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:30px;}
  .timeline > li{padding-left:58px;}
  .timeline::before{left:17px;}
  .tl-dot{left:6px;width:22px;height:22px;}
  .tl-body{padding:16px 18px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .subscribe-form .btn{width:100%;}
}
@media (max-width:519px){
  h1{font-size:27px;line-height:1.32;}
  h2{font-size:21px;}
  .site-header{padding:10px 0;}
  .brand-text{font-size:15px;}
  .header-actions .btn-primary span{display:none;}
  .header-actions .btn-primary{width:44px;padding:0;}
  .stat-strip{grid-template-columns:1fr;}
  .cat-hero{padding:118px 0 46px;}
  .cat-hero__lead{font-size:15.5px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .timeline-wrap{padding:28px 18px;border-radius:var(--radius-lg);}
}

/* 打印基础 */
@media print{
  body{background:#fff;color:#000;}
  body::before,.site-header,.cta-panel,.footer-social,.subscribe-form{display:none !important;}
  .card,.tl-body,.device-card{border:1px solid #ccc;box-shadow:none;background:#fff;color:#000;}
  .cat-hero{padding:20px 0;}
  .cat-hero__bg{display:none;}
}