/* roulang page: index */
:root{
  --ink-900:#060F17;
  --ink-800:#0A1B27;
  --ink-700:#0F2634;
  --primary:#17B6D8;
  --primary-hover:#2AC8E8;
  --primary-press:#0F93B4;
  --primary-400:#5BD7F0;
  --accent:#FF7A3D;
  --bg-light:#F2F7FA;
  --line-light:#DDE7EE;
  --text-1:#EAF4FA;
  --text-2:#A8BECB;
  --text-3:#6E8794;
  --l-text-1:#10222C;
  --l-text-2:#4A6270;
  --l-text-3:#7C8F9A;
  --ok:#37D67A;
  --warn:#F5B23C;
  --err:#F0554F;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"DIN Alternate","Barlow","Roboto Mono",ui-monospace,monospace;
  --r-card:18px;
  --r-img:16px;
  --r-input:12px;
  --r-pill:999px;
  --r-cta:12px;
  --glass-bg:rgba(255,255,255,.06);
  --glass-bd:rgba(255,255,255,.10);
  --hairline:rgba(255,255,255,.08);
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
  --shadow-light:0 10px 28px -18px rgba(16,44,60,.28);
  --glow:0 0 0 1px rgba(23,182,216,.35),0 10px 32px -8px rgba(23,182,216,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary-400);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--primary-hover);}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--text-1);letter-spacing:-.01em;line-height:1.3;font-weight:650;}
h1{font-size:44px;line-height:1.22;font-weight:700;}
h2{font-size:32px;}
h3{font-size:20px;line-height:1.45;font-weight:600;}
:focus-visible{outline:2px solid var(--primary-400);outline-offset:2px;border-radius:6px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;}

/* ---------- 容器 ---------- */
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;}
.grid-container.full{max-width:none;}
.section{padding:100px 0;}
.section--tight{padding:72px 0;}
.section--light{background:var(--bg-light);color:var(--l-text-1);}
.section--light h2,.section--light h3,.section--light h4{color:var(--l-text-1);}
.section--band{background:var(--ink-700);}
[id]{scroll-margin-top:96px;}

/* ---------- 头部与导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease),backdrop-filter .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,27,39,.74);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom-color:var(--hairline);
  box-shadow:0 14px 34px -26px rgba(0,0,0,.95);
}
.nav-wrap{display:flex;align-items:center;gap:20px;height:76px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;text-decoration:none;color:var(--text-1);}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--primary),#0C6F88);
  color:#04141C;font-size:15px;font-weight:700;
  box-shadow:var(--glow);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;line-height:1.2;white-space:nowrap;}
.brand-text em{font-style:normal;color:var(--primary-400);}
.nav-links{display:flex;align-items:center;gap:2px;margin:0 auto;}
.nav-links a{
  position:relative;display:block;padding:10px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);line-height:1.4;transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-links a:hover{color:var(--text-1);background:rgba(255,255,255,.05);}
.nav-links a.is-current{color:var(--primary-400);}
.nav-links a.is-current::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-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(--glass-bd);
  background:rgba(255,255,255,.05);color:var(--text-1);font-size:16px;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:rgba(23,182,216,.5);color:var(--primary-400);}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;top:0;left:0;right:0;z-index:88;
  padding:92px 20px 24px;
  background:rgba(6,15,23,.97);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--hairline);
  box-shadow:0 24px 48px -28px rgba(0,0,0,.95);
  transform:translateY(-104%);
  transition:transform .24s var(--ease);
  max-height:100vh;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0);}
.mobile-drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 4px;font-size:16px;color:var(--text-2);
  border-bottom:1px solid var(--hairline);
}
.mobile-drawer a.drawer-link:hover,.mobile-drawer a.drawer-link.is-current{color:var(--primary-400);}
.mobile-drawer a.drawer-link i{font-size:13px;color:var(--text-3);}
.drawer-cta{margin-top:22px;}
.drawer-cta .btn{width:100%;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:13px 22px;
  font-family:inherit;font-size:15px;font-weight:600;line-height:1.2;
  border-radius:var(--r-cta);border:1px solid transparent;
  cursor:pointer;text-align:center;text-decoration:none;
  transition:background .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.btn i{font-size:15px;line-height:1;}
.btn-primary{background:var(--primary);color:#04161E;box-shadow:var(--glow);}
.btn-primary:hover{background:var(--primary-hover);color:#04161E;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(23,182,216,.55),0 18px 44px -8px rgba(23,182,216,.72);}
.btn-primary:active{background:var(--primary-press);transform:translateY(0);box-shadow:0 0 0 1px rgba(23,182,216,.4),0 6px 18px -6px rgba(23,182,216,.5);}
.btn-outline{background:transparent;color:var(--primary-400);border-color:rgba(23,182,216,.48);}
.btn-outline:hover{background:rgba(23,182,216,.10);color:#EAF4FA;border-color:var(--primary-400);transform:translateY(-2px);}
.btn-quiet{background:rgba(255,255,255,.05);color:var(--text-1);border-color:var(--glass-bd);}
.btn-quiet:hover{background:rgba(255,255,255,.10);color:#fff;transform:translateY(-2px);}
.btn-sm{padding:10px 16px;font-size:14px;min-height:44px;}
.btn-block{width:100%;}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);}
.section--light .link-more{color:#0C7E99;}
.link-more i{font-size:12px;transition:transform .2s var(--ease);}
.link-more:hover i{transform:translateX(4px);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;line-height:1.5;font-weight:600;
  background:rgba(255,255,255,.07);border:1px solid var(--glass-bd);color:var(--text-2);
}
.badge-primary{background:rgba(23,182,216,.12);border-color:rgba(23,182,216,.30);color:var(--primary-400);}
.badge-accent{background:rgba(255,122,61,.14);border-color:rgba(255,122,61,.30);color:#FFB08A;}
.section--light .badge{background:rgba(23,182,216,.10);border-color:rgba(23,182,216,.24);color:#0C7E99;}

/* ---------- 玻璃容器 ---------- */
.glass{
  position:relative;
  background:var(--glass-bg);
  border:1px solid var(--glass-bd);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
}
.glass::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;border-radius:18px 18px 0 0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
  pointer-events:none;
}
.corner{position:absolute;width:14px;height:14px;border:1px solid rgba(23,182,216,.65);pointer-events:none;}
.corner.tl{top:10px;left:10px;border-right:0;border-bottom:0;border-radius:7px 0 0 0;}
.corner.tr{top:10px;right:10px;border-left:0;border-bottom:0;border-radius:0 7px 0 0;}
.corner.bl{bottom:10px;left:10px;border-right:0;border-top:0;border-radius:0 0 0 7px;}
.corner.br{bottom:10px;right:10px;border-left:0;border-top:0;border-radius:0 0 7px 0;}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:154px 0 0;
  background:var(--ink-800);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(58% 52% at 78% 14%, rgba(23,182,216,.12), transparent 70%),
    radial-gradient(44% 40% at 10% 84%, rgba(255,122,61,.06), transparent 70%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 78%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 78%);
}
.hero .grid-container{position:relative;z-index:2;}
.hero-copy{padding-bottom:56px;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--primary-400);
  background:rgba(23,182,216,.10);
  border:1px solid rgba(23,182,216,.28);
  margin-bottom:22px;
}
.hero h1{margin-bottom:20px;max-width:15em;}
.hero h1 .hl{color:var(--primary-400);}
.hero-sub{
  font-size:17px;line-height:1.8;color:var(--text-2);
  max-width:34em;margin-bottom:32px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;}
.hero-points li{
  display:flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-3);
}
.hero-points i{color:var(--primary);font-size:13px;}

.entry-card{padding:30px 28px 26px;}
.entry-title{font-size:17px;font-weight:650;color:var(--text-1);margin-bottom:6px;letter-spacing:-.01em;}
.entry-desc{font-size:13.5px;color:var(--text-3);margin-bottom:20px;}
.entry-list{margin-bottom:22px;}
.entry-list li{
  display:flex;align-items:flex-start;gap:12px;
  padding:12px 0;border-bottom:1px solid var(--hairline);
  font-size:14.5px;color:var(--text-2);line-height:1.7;
}
.entry-list li:last-child{border-bottom:0;}
.entry-list i{
  flex:0 0 30px;width:30px;height:30px;border-radius:9px;
  display:grid;place-items:center;
  background:rgba(23,182,216,.12);color:var(--primary-400);font-size:13px;
}
.entry-note{font-size:12px;color:var(--text-3);text-align:center;margin-top:12px;line-height:1.6;}

/* 信任条 */
.trustbar{
  position:relative;z-index:2;
  display:flex;flex-wrap:wrap;
  border-top:1px solid var(--hairline);
  border-bottom:1px solid var(--hairline);
  background:rgba(6,15,23,.45);
}
.trustbar .tb-item{
  flex:1 1 200px;min-width:0;
  padding:22px 26px;
  border-right:1px solid var(--hairline);
}
.trustbar .tb-item:last-child{border-right:0;}
.tb-num{font-size:26px;font-weight:700;color:var(--text-1);line-height:1.2;letter-spacing:-.02em;}
.tb-num span{font-size:14px;color:var(--primary-400);margin-left:2px;font-weight:600;}
.tb-label{font-size:12.5px;color:var(--text-3);line-height:1.6;margin-top:4px;}

/* ---------- 区块头 ---------- */
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:48px;}
.sec-head .sec-kicker{
  display:block;font-size:12.5px;font-weight:600;letter-spacing:.14em;
  color:var(--primary-400);text-transform:uppercase;margin-bottom:12px;
}
.sec-head h2{max-width:20em;}
.sec-head p{font-size:15px;color:var(--text-2);margin-top:12px;max-width:42em;line-height:1.8;}
.section--light .sec-head p{color:var(--l-text-2);}

/* ---------- 卖点栅格 ---------- */
.feature-grid{row-gap:24px;}
.feature-card{
  position:relative;height:100%;overflow:hidden;
  border-radius:var(--r-card);
  border:1px solid var(--hairline);
  background:var(--ink-700);
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(23,182,216,.42);}
.feature-card .media{overflow:hidden;border-radius:0;aspect-ratio:16/9;}
.feature-card .media img{width:100%;height:100%;object-fit:cover;transition:transform .28s var(--ease);}
.feature-card:hover .media img{transform:scale(1.03);}
.feature-body{padding:26px 24px 28px;}
.feature-body h3{margin-bottom:12px;font-size:20px;}
.feature-body p{font-size:14.5px;color:var(--text-2);line-height:1.85;}
.feature-card--large .media{aspect-ratio:16/9;}
.feature-card--large .feature-body h3{font-size:23px;}
.feature-card--small{display:flex;flex-direction:column;justify-content:center;}
.feature-card--small .feature-body{padding:28px 24px;}
.f-icon{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:rgba(23,182,216,.12);border:1px solid rgba(23,182,216,.26);
  color:var(--primary-400);font-size:17px;margin-bottom:18px;
}
.f-icon.accent{background:rgba(255,122,61,.13);border-color:rgba(255,122,61,.28);color:#FFA276;}

/* ---------- 步骤流程 ---------- */
.steps{position:relative;}
.steps .grid-x{row-gap:32px;}
.step-col{position:relative;}
.step-col::after{
  content:"";position:absolute;top:34px;right:-14px;width:28px;
  border-top:1px dashed rgba(255,255,255,.16);
}
.step-col:last-child::after{display:none;}
.step-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:42px;font-weight:700;line-height:1;color:var(--primary);letter-spacing:-.02em;
  margin-bottom:18px;
}
.step-media{
  width:100%;aspect-ratio:4/3;border-radius:14px;overflow:hidden;
  margin-bottom:18px;border:1px solid var(--hairline);
}
.step-media img{width:100%;height:100%;object-fit:cover;}
.step-title{font-size:18px;font-weight:650;color:var(--text-1);margin-bottom:10px;}
.step-text{font-size:14.5px;color:var(--text-2);line-height:1.85;}

/* ---------- 资讯区（浅色带） ---------- */
.news-lead{
  display:flex;flex-direction:column;height:100%;overflow:hidden;
  background:#fff;border:1px solid var(--line-light);border-radius:var(--r-card);
  box-shadow:var(--shadow-light);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.news-lead:hover{transform:translateY(-4px);box-shadow:0 20px 40px -22px rgba(16,44,60,.34);}
.news-lead .media{overflow:hidden;border-radius:0;aspect-ratio:16/9;}
.news-lead .media img{width:100%;height:100%;object-fit:cover;transition:transform .28s var(--ease);}
.news-lead:hover .media img{transform:scale(1.03);}
.news-lead .nl-body{padding:26px 26px 28px;display:flex;flex-direction:column;flex:1;}
.news-lead h3{font-size:21px;line-height:1.45;margin:14px 0 12px;color:var(--l-text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-lead p{font-size:14.5px;color:var(--l-text-2);line-height:1.85;margin-bottom:18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-lead .nl-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12.5px;color:var(--l-text-3);}
.news-lead .nl-foot i{transition:transform .2s var(--ease);}
.news-lead:hover .nl-foot i{transform:translateX(4px);}

.news-list{display:flex;flex-direction:column;gap:12px;}
.news-row{
  position:relative;display:block;
  background:#fff;border:1px solid var(--line-light);border-radius:14px;
  padding:20px 22px 20px 26px;
  box-shadow:0 6px 18px -14px rgba(16,44,60,.28);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  color:inherit;
}
.news-row::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:var(--primary);opacity:.55;transition:opacity .2s var(--ease);
}
.news-row:hover{transform:translateY(-3px);border-color:rgba(23,182,216,.55);box-shadow:0 14px 30px -18px rgba(16,44,60,.34);color:inherit;}
.news-row:hover::before{opacity:1;}
.news-row h3{
  font-size:16.5px;line-height:1.5;color:var(--l-text-1);margin-bottom:6px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-row p{
  font-size:13.5px;color:var(--l-text-2);line-height:1.75;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-row .meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:14px;
  font-size:12.5px;color:var(--l-text-3);
}
.news-row .meta i{font-size:11px;transition:transform .2s var(--ease);}
.news-row:hover .meta i{transform:translateX(4px);color:#0C7E99;}

.empty-state{
  padding:48px 24px;text-align:center;
  border:1px dashed var(--line-light);border-radius:var(--r-card);background:#fff;
}
.empty-state i{font-size:44px;color:#B9CBD6;line-height:1;margin-bottom:16px;display:block;}
.empty-state p{font-size:14.5px;color:var(--l-text-2);margin-bottom:18px;}

/* ---------- 社会认同 ---------- */
.metric{display:flex;flex-direction:column;gap:2px;padding:20px 0;border-bottom:1px solid var(--hairline);}
.metric:last-child{border-bottom:0;}
.metric-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:44px;font-weight:700;line-height:1.1;color:var(--text-1);letter-spacing:-.03em;
}
.metric-num span{font-size:16px;color:var(--primary-400);margin-left:4px;font-weight:600;}
.metric-label{font-size:13.5px;color:var(--text-3);line-height:1.6;}

.logo-wall{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:24px;}
.logo-cell{
  display:flex;align-items:center;justify-content:center;gap:8px;
  height:66px;border-radius:14px;
  background:rgba(255,255,255,.04);border:1px solid var(--hairline);
  color:var(--text-3);font-size:13.5px;font-weight:600;
  filter:grayscale(60%);opacity:.62;
  transition:opacity .2s var(--ease),filter .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.logo-cell i{font-size:14px;}
.logo-cell:hover{opacity:1;filter:grayscale(0);border-color:rgba(23,182,216,.45);color:var(--primary-400);}

.voice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.voice{
  padding:22px 22px 20px;border-radius:16px;
  background:rgba(255,255,255,.05);border:1px solid var(--glass-bd);
}
.voice-head{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;flex:0 0 40px;
  background:linear-gradient(140deg,rgba(23,182,216,.35),rgba(23,182,216,.08));
  border:1px solid rgba(23,182,216,.35);color:var(--primary-400);
  font-size:14px;font-weight:700;
}
.voice-name{font-size:14px;font-weight:650;color:var(--text-1);line-height:1.4;}
.voice-role{font-size:12px;color:var(--text-3);line-height:1.5;}
.voice p{font-size:14px;color:var(--text-2);line-height:1.85;}

/* ---------- FAQ ---------- */
.accordion{background:transparent;border:0;margin:0;}
.accordion .accordion-item{
  border:1px solid var(--hairline);border-radius:16px;background:rgba(255,255,255,.04);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.accordion .accordion-item.is-active{border-color:rgba(23,182,216,.42);background:rgba(23,182,216,.06);}
.accordion .accordion-title{
  display:flex;align-items:center;gap:16px;
  min-height:64px;padding:16px 22px;border:0;
  font-size:16px;font-weight:600;color:var(--text-1);line-height:1.5;
  background:transparent;
}
.accordion .accordion-title:hover{background:rgba(255,255,255,.03);color:var(--text-1);}
.accordion .accordion-title::before{display:none;}
.faq-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:15px;font-weight:700;color:var(--primary);flex:0 0 auto;width:26px;
}
.faq-q{flex:1;}
.faq-icon{
  flex:0 0 auto;width:24px;height:24px;display:grid;place-items:center;
  color:var(--primary-400);font-size:13px;
  transition:transform .22s var(--ease);
}
.accordion .accordion-item.is-active .faq-icon{transform:rotate(180deg);}
.accordion .accordion-content{
  padding:0 22px 0 64px;border:0;background:transparent;color:var(--text-2);
}
.accordion .accordion-content p{font-size:14.5px;line-height:1.85;color:var(--text-2);padding-bottom:20px;max-width:760px;}

/* ---------- 底部转化 ---------- */
.final-cta{
  position:relative;overflow:hidden;
  padding:96px 0;
  background:var(--ink-900);
  border-top:1px solid rgba(23,182,216,.22);
  border-bottom:1px solid rgba(23,182,216,.22);
  text-align:center;
}
.final-cta::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(50% 90% at 50% 100%, rgba(23,182,216,.16), transparent 70%);
}
.final-cta .grid-container{position:relative;z-index:2;}
.final-cta h2{margin-bottom:16px;}
.final-cta p{font-size:15.5px;color:var(--text-2);max-width:38em;margin:0 auto 32px;line-height:1.85;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--hairline);padding:72px 0 0;}
.footer-grid{row-gap:36px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:13.5px;color:var(--text-3);line-height:1.85;max-width:30em;}
.footer-col h4{font-size:14px;font-weight:650;color:var(--text-1);margin-bottom:16px;letter-spacing:.02em;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:13.5px;color:var(--text-2);}
.footer-col a:hover{color:var(--primary-400);}
.footer-col .ft-text{font-size:13.5px;color:var(--text-3);line-height:1.8;}
.footer-bottom{
  margin-top:56px;padding:22px 0;
  border-top:1px solid var(--hairline);
  text-align:center;font-size:12.5px;color:var(--text-3);line-height:1.8;
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary-400);}

/* ---------- 底部固定转化条 ---------- */
.sticky-bar{
  position:fixed;right:24px;bottom:24px;z-index:95;
  width:344px;max-width:calc(100vw - 32px);
  display:flex;align-items:center;gap:14px;
  padding:14px 16px;border-radius:16px;
  background:rgba(15,38,52,.80);
  border:1px solid var(--glass-bd);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 22px 44px -26px rgba(0,0,0,.95);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
}
.sticky-bar.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.sb-text{flex:1;min-width:0;}
.sb-text strong{display:block;font-size:13.5px;font-weight:650;color:var(--text-1);line-height:1.4;}
.sb-text span{display:block;font-size:12px;color:var(--text-3);line-height:1.5;margin-top:2px;}
.sb-close{
  position:absolute;top:-10px;right:-10px;
  width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--ink-700);border:1px solid var(--glass-bd);
  color:var(--text-3);font-size:11px;cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.sb-close:hover{color:var(--text-1);border-color:rgba(23,182,216,.5);}
.sb-close:focus-visible{outline:2px solid var(--primary-400);outline-offset:2px;}

/* ---------- 响应式 ---------- */
@media (min-width:1440px){
  .grid-container{max-width:1280px;}
}
@media (max-width:1199px){
  .nav-links{gap:0;}
  .nav-links a{padding:10px 11px;font-size:14.5px;}
}
@media (max-width:1023px){
  .section{padding:76px 0;}
  .hero{padding-top:132px;}
  h1{font-size:36px;}
  h2{font-size:27px;}
  .sec-head{margin-bottom:36px;}
  .nav-links{display:none;}
  .nav-actions .btn-quiet{display:none;}
  .nav-toggle{display:inline-flex;}
  .hero-copy{padding-bottom:40px;}
  .metrics-row{padding-bottom:12px;}
  .voice-grid{grid-template-columns:1fr;}
  .step-col::after{display:none;}
  .accordion .accordion-content{padding-left:22px;}
}
@media (max-width:639px){
  body{font-size:15.5px;}
  .grid-container{padding-left:16px;padding-right:16px;}
  .section{padding:60px 0;}
  .hero{padding-top:112px;}
  h1{font-size:30px;line-height:1.28;}
  h2{font-size:24px;}
  h3{font-size:17px;}
  .hero-sub{font-size:15.5px;}
  .brand-text{font-size:15px;}
  .brand-mark{width:32px;height:32px;border-radius:10px;font-size:13px;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .hero-cta .btn{width:100%;}
  .entry-card{padding:24px 20px 22px;}
  .trustbar .tb-item{flex:1 1 50%;padding:16px 18px;border-right:0;border-bottom:1px solid var(--hairline);}
  .trustbar .tb-item:nth-child(2n){border-right:0;}
  .tb-num{font-size:22px;}
  .feature-card--large .feature-body h3{font-size:19px;}
  .step-num{font-size:34px;}
  .logo-wall{grid-template-columns:repeat(2,minmax(0,1fr));}
  .metric-num{font-size:36px;}
  .final-cta{padding:64px 0;}
  .site-footer{padding-top:56px;padding-bottom:104px;}
  .footer-bottom{margin-top:36px;}
  .sticky-bar{
    left:0;right:0;bottom:0;width:auto;max-width:none;
    border-radius:16px 16px 0 0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    transform:translateY(100%);
  }
  .sticky-bar.is-visible{transform:translateY(0);}
  .sb-close{top:-12px;right:12px;}
  .sb-text strong{font-size:13px;}
  .sb-text span{display:none;}
}
@media (max-width:400px){
  .metrics-row .cell{width:100%;}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important;}
}
@media print{
  body{background:#fff;color:#000;}
  .site-header,.sticky-bar,.site-footer,.mobile-drawer,.hero::before,.hero::after{display:none !important;}
  .glass,.feature-card,.news-row{box-shadow:none;border-color:#ccc;background:#fff;color:#000;}
}

/* roulang page: article */
:root{
  --ink-900:#060F17;
  --ink-800:#0A1B27;
  --ink-700:#0F2634;
  --primary:#17B6D8;
  --primary-hover:#2AC8E8;
  --primary-press:#0F93B4;
  --primary-400:#5BD7F0;
  --accent:#FF7A3D;
  --bg-light:#F2F7FA;
  --line-light:#DDE7EE;
  --text-1:#EAF4FA;
  --text-2:#A8BECB;
  --text-3:#6E8794;
  --d-text-1:#10222C;
  --d-text-2:#4A6270;
  --d-text-3:#7C8F9A;
  --ok:#37D67A;
  --warn:#F5B23C;
  --err:#F0554F;
  --line:rgba(255,255,255,.08);
  --glass-bg:rgba(255,255,255,.06);
  --glass-bd:rgba(255,255,255,.10);
  --r-card:18px;
  --r-img:16px;
  --r-input:12px;
  --r-cta:12px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
  --shadow-light:0 10px 28px -18px rgba(16,44,60,.28);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"DIN Alternate","Barlow","Roboto Mono",ui-monospace,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--primary-400);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:#fff}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;color:var(--text-1);font-weight:650;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary-400);outline-offset:2px;border-radius:6px}
.grid-container{max-width:1200px;margin:0 auto;padding:0 24px}
.band{padding:96px 0}
.band-tight{padding:72px 0}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
.muted{color:var(--text-2)}
.hidden{display:none !important}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  transition:background .24s var(--ease),box-shadow .24s var(--ease),backdrop-filter .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,27,39,.82);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
  box-shadow:0 14px 34px -26px rgba(0,0,0,.9);
}
.nav-wrap{display:flex;align-items:center;gap:32px;height:76px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text-1);flex:0 0 auto}
.brand:hover{color:var(--text-1)}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,rgba(23,182,216,.9),rgba(15,147,180,.75));
  color:#04141C;font-weight:700;font-size:17px;
  box-shadow:0 8px 22px -10px rgba(23,182,216,.8);
}
.brand-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--primary-400);margin-left:2px}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links li{list-style:none}
.nav-links a{
  position:relative;display:inline-block;padding:6px 0;
  color:var(--text-2);font-size:15px;font-weight:500;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-links a:hover{color:var(--text-1)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-current{color:var(--primary-400)}
.nav-links a.is-current::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:var(--glass-bg);border:1px solid var(--glass-bd);
  color:var(--text-1);font-size:17px;cursor:pointer;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-cta);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn i{font-size:16px}
.btn-sm{min-height:42px;padding:0 18px;font-size:14.5px}
.btn-primary{
  background:var(--primary);color:#04141C;
  box-shadow:0 0 0 1px rgba(23,182,216,.35),0 10px 32px -8px rgba(23,182,216,.55);
}
.btn-primary:hover{background:var(--primary-hover);color:#04141C;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(42,200,232,.5),0 16px 40px -8px rgba(42,200,232,.65)}
.btn-primary:active{background:var(--primary-press);transform:translateY(0)}
.btn-quiet{
  background:transparent;color:var(--primary-400);border-color:rgba(91,215,240,.42);
}
.btn-quiet:hover{background:rgba(23,182,216,.1);color:var(--primary-400);border-color:var(--primary-400);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text-2);padding:0 8px}
.btn-ghost:hover{color:var(--primary-400)}
.btn-ghost span{position:relative}
.btn-ghost span::after{content:"";position:absolute;left:0;right:0;bottom:-3px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.btn-ghost:hover span::after{transform:scaleX(1)}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--primary-400)}
.link-more i{transition:transform .22s var(--ease)}
.link-more:hover i{transform:translateX(4px)}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:90;display:none;
}
.drawer.is-open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(4,12,18,.72)}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(86vw,360px);
  background:var(--ink-900);border-left:1px solid var(--line);
  padding:24px 20px 28px;display:flex;flex-direction:column;gap:6px;
  overflow-y:auto;
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{width:44px;height:44px;border-radius:12px;background:var(--glass-bg);border:1px solid var(--glass-bd);color:var(--text-1);font-size:17px;cursor:pointer}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 14px;border-radius:12px;color:var(--text-2);font-size:15.5px;
}
.drawer-link:hover{background:rgba(255,255,255,.05);color:var(--text-1)}
.drawer-link.is-current{color:var(--primary-400);background:rgba(23,182,216,.1)}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line)}
.drawer-foot .btn{width:100%}

/* ---------- 面包屑 + 文章头 ---------- */
.head-band{
  padding:132px 0 52px;
  background:
    radial-gradient(900px 420px at 12% -10%,rgba(23,182,216,.12),transparent 62%),
    linear-gradient(180deg,var(--ink-800),var(--ink-700));
  border-bottom:1px solid var(--line);
}
.crumbs{
  display:flex;align-items:center;gap:8px;flex-wrap:nowrap;overflow-x:auto;
  font-size:13.5px;color:var(--text-3);margin-bottom:24px;scrollbar-width:none;
}
.crumbs::-webkit-scrollbar{display:none}
.crumbs a{color:var(--text-3);white-space:nowrap}
.crumbs a:hover{color:var(--primary-400)}
.crumbs .sep{color:rgba(255,255,255,.22)}
.crumbs .now{color:var(--text-1);white-space:nowrap;max-width:280px;overflow:hidden;text-overflow:ellipsis}
.head-inner{max-width:920px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:rgba(23,182,216,.12);color:var(--primary-400);border:1px solid rgba(23,182,216,.24);
}
.chip-accent{background:rgba(255,122,61,.12);color:#FFB18A;border-color:rgba(255,122,61,.28)}
h1.article-title{
  margin-top:18px;font-size:44px;line-height:1.22;font-weight:700;letter-spacing:-.01em;
}
.meta-row{
  display:flex;align-items:center;flex-wrap:wrap;gap:10px;
  margin-top:22px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.24)}
.meta-row time{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- 正文区（浅色带） ---------- */
.article-band{background:var(--bg-light);color:var(--d-text-1);padding:44px 0 96px}
.toc-bar{
  position:sticky;top:76px;z-index:20;
  display:flex;gap:8px;overflow-x:auto;padding:10px 0 14px;
  margin-bottom:20px;scrollbar-width:none;
  background:linear-gradient(180deg,rgba(242,247,250,.96),rgba(242,247,250,.78));
  backdrop-filter:blur(6px);
}
.toc-bar::-webkit-scrollbar{display:none}
.toc-bar a{
  flex:0 0 auto;padding:7px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line-light);
  font-size:13px;font-weight:500;color:var(--d-text-2);
}
.toc-bar a:hover{border-color:var(--primary);color:var(--primary-press)}
.article-card{
  background:#fff;border:1px solid var(--line-light);border-radius:var(--r-card);
  box-shadow:var(--shadow-light);padding:48px;max-width:840px;
}
.article-body{max-width:760px;color:var(--d-text-1)}
.article-body p{margin:0 0 20px;line-height:1.85;color:#1B303B}
.article-body h2{
  font-size:24px;line-height:1.35;color:var(--d-text-1);
  margin:40px 0 16px;padding-left:14px;border-left:4px solid var(--primary);
}
.article-body h3{font-size:19px;color:var(--d-text-1);margin:32px 0 12px;font-weight:600}
.article-body h4{font-size:17px;color:var(--d-text-1);margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 20px}
.article-body li{
  position:relative;padding-left:20px;margin-bottom:10px;line-height:1.8;color:#1B303B;
}
.article-body ul > li::before{
  content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;
  border-radius:2px;background:var(--primary);
}
.article-body ol{counter-reset:olc}
.article-body ol > li{counter-increment:olc}
.article-body ol > li::before{
  content:counter(olc);position:absolute;left:0;top:2px;
  font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--primary-press);
}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;border-left:3px solid var(--primary);
  background:#EEF6FA;border-radius:0 12px 12px 0;color:var(--d-text-2);font-style:normal;
}
.article-body blockquote p{margin:0;color:var(--d-text-2)}
.article-body img{border-radius:var(--r-img);margin:12px auto 8px;}
.article-body figure{margin:0 0 8px}
.article-body figcaption{text-align:center;font-size:13px;color:var(--d-text-3);margin-bottom:12px}
.article-body a{color:var(--primary-press);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#0A728C}
.article-body strong{color:#0C2530;font-weight:700}
.article-body table{margin:20px 0;font-size:14.5px}
.article-body table th{background:#E8F1F6;color:var(--d-text-1);border-bottom:1px solid var(--line-light)}
.article-body table td{border-bottom:1px solid var(--line-light);color:var(--d-text-2)}
.article-body table tr:last-child td{border-bottom:none}
.table-scroll{overflow-x:auto;margin:20px 0;border:1px solid var(--line-light);border-radius:12px}
.empty-state{
  text-align:center;padding:64px 24px;border:1px dashed var(--line-light);
  border-radius:var(--r-card);background:#fff;
}
.empty-state i{font-size:48px;color:#B9CBD6}
.empty-state h3{margin:18px 0 8px;font-size:20px;color:var(--d-text-1)}
.empty-state p{color:var(--d-text-2);margin-bottom:22px}
.empty-state .btn-quiet{color:var(--primary-press);border-color:rgba(23,182,216,.45)}

/* ---------- 文末工具 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line-light)}
.tag{
  padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:500;
  background:#EDF4F8;color:var(--d-text-2);border:1px solid var(--line-light);
}
.tool-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:22px}
.share-group{display:flex;gap:10px}
.icon-btn{
  width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line-light);color:var(--d-text-2);cursor:pointer;
  transition:transform .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.icon-btn:hover{transform:translateY(-2px);border-color:var(--primary);color:var(--primary-press)}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:32px}
.pager a{
  display:flex;flex-direction:column;gap:6px;padding:18px 20px;border-radius:14px;
  background:#fff;border:1px solid var(--line-light);color:var(--d-text-1);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.pager a:hover{transform:translateY(-4px);border-color:var(--primary-400);box-shadow:var(--shadow-light);color:var(--d-text-1)}
.pager .pager-k{font-size:12.5px;color:var(--d-text-3);display:flex;align-items:center;gap:6px}
.pager .pager-t{font-size:15px;font-weight:600;line-height:1.5}
.pager .next{align-items:flex-end;text-align:right}

/* ---------- 侧栏 ---------- */
.side-sticky{position:sticky;top:104px;display:flex;flex-direction:column;gap:18px}
.side-card{
  background:#fff;border:1px solid var(--line-light);border-radius:var(--r-card);
  box-shadow:var(--shadow-light);padding:26px;
}
.side-card h3{font-size:17px;color:var(--d-text-1);margin-bottom:10px}
.side-card p{font-size:14px;color:var(--d-text-2);line-height:1.7;margin-bottom:18px}
.side-card .btn{width:100%}
.hot-list{margin-top:6px;border-top:1px solid var(--line-light);padding-top:6px}
.hot-list a{
  display:flex;align-items:center;gap:10px;padding:13px 0;border-bottom:1px dashed var(--line-light);
  font-size:14.5px;color:var(--d-text-2);
}
.hot-list a:last-child{border-bottom:none}
.hot-list a i{color:var(--primary);font-size:12px}
.hot-list a:hover{color:var(--primary-press)}
.hot-list a:hover i{transform:translateX(3px)}
.side-note{
  font-size:13px;line-height:1.7;color:var(--d-text-3);
  background:#EEF6FA;border-left:3px solid var(--primary);border-radius:0 12px 12px 0;
  padding:14px 16px;
}

/* ---------- 相关推荐 ---------- */
.related-band{background:var(--bg-light);border-top:1px solid var(--line-light);padding:0 0 96px;color:var(--d-text-1)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:34px}
.sec-head h2{font-size:28px;color:var(--d-text-1)}
.sec-head .sub{font-size:14.5px;color:var(--d-text-2);margin-top:10px;max-width:620px}
.rel-card{
  display:flex;gap:18px;background:#fff;border:1px solid var(--line-light);
  border-radius:var(--r-card);padding:16px;box-shadow:var(--shadow-light);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
  height:100%;
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--primary-400)}
.rel-thumb{flex:0 0 40%;max-width:190px;border-radius:var(--r-img);overflow:hidden;aspect-ratio:4/3}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body{display:flex;flex-direction:column;gap:8px;min-width:0}
.rel-body h3{font-size:16.5px;line-height:1.5;color:var(--d-text-1);font-weight:600}
.rel-body p{font-size:13.5px;color:var(--d-text-2);line-height:1.7}
.rel-meta{margin-top:auto;display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--d-text-3)}
.rel-meta .dot{width:3px;height:3px;border-radius:50%;background:#C4D4DE}

/* ---------- FAQ（深色带） ---------- */
.faq-band{background:var(--ink-800);padding:96px 0}
.faq-band .sec-head h2{color:var(--text-1)}
.faq-band .sec-head .sub{color:var(--text-2)}
.accordion{background:transparent;border:none;margin:0}
.accordion .accordion-item{
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:14px;margin-bottom:12px;overflow:hidden;
}
.accordion .accordion-title{
  display:flex;align-items:center;gap:14px;min-height:64px;padding:0 22px;
  font-size:16.5px;font-weight:600;color:var(--text-1);
  background:transparent;border:none;border-bottom:1px solid transparent;
}
.accordion .accordion-title:hover{background:rgba(255,255,255,.03)}
.accordion .accordion-title .idx{
  font-family:var(--font-num);font-size:14px;font-weight:700;color:var(--primary-400);flex:0 0 auto;
}
.accordion .accordion-title::before{display:none}
.accordion .accordion-title .pm{margin-left:auto;width:18px;height:18px;position:relative;flex:0 0 auto}
.accordion .accordion-title .pm::before,
.accordion .accordion-title .pm::after{
  content:"";position:absolute;background:var(--primary-400);transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.accordion .accordion-title .pm::before{left:0;top:8px;width:18px;height:2px;border-radius:2px}
.accordion .accordion-title .pm::after{left:8px;top:0;width:2px;height:18px;border-radius:2px}
.accordion .accordion-title[aria-expanded="true"] .pm::after{transform:rotate(90deg);opacity:0}
.accordion .accordion-content{
  background:transparent;border:none;padding:0 22px 20px 60px;color:var(--text-2);
  font-size:14.5px;line-height:1.85;max-width:760px;
}
.accordion .accordion-content p{color:var(--text-2)}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:
    radial-gradient(720px 320px at 50% 0%,rgba(23,182,216,.18),transparent 66%),
    var(--ink-900);
  border-top:1px solid rgba(23,182,216,.24);
  padding:88px 0;text-align:center;
}
.cta-band h2{font-size:32px;line-height:1.3}
.cta-band p{margin:16px auto 30px;max-width:620px;color:var(--text-2);font-size:15.5px}
.cta-band .btn{min-width:200px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:72px 0 0;color:var(--text-2)}
.footer-grid{row-gap:36px}
.footer-brand .brand{margin-bottom:18px}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--text-3);max-width:360px}
.footer-col h4{font-size:15px;color:var(--text-1);margin-bottom:16px;font-weight:600}
.footer-col ul li{margin-bottom:11px}
.footer-col ul a{font-size:14px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--primary-400)}
.ft-text{font-size:13.5px;line-height:1.8;color:var(--text-3);margin-bottom:10px}
.footer-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid var(--line);
  text-align:center;font-size:12.5px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--primary-400)}

/* ---------- 底部固定转化条 ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:340px;display:flex;align-items:center;gap:14px;
  padding:14px 16px;border-radius:16px;
  background:rgba(10,27,39,.88);
  border:1px solid var(--glass-bd);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 22px 48px -24px rgba(0,0,0,.9);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.float-cta.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .fc-text{font-size:13px;line-height:1.55;color:var(--text-2);flex:1 1 auto}
.float-cta .fc-close{
  position:absolute;top:-10px;right:-10px;width:26px;height:26px;border-radius:50%;
  background:var(--ink-700);border:1px solid var(--glass-bd);color:var(--text-2);
  font-size:12px;cursor:pointer;display:flex;align-items:center;justify-content:center;
}
.float-cta .fc-close:hover{color:#fff}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1200px){
  .grid-container{max-width:1100px}
}
@media screen and (max-width:1024px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-actions .btn-quiet{display:none}
  .nav-wrap{gap:16px;height:68px}
  .band{padding:72px 0}
  .head-band{padding:112px 0 44px}
  h1.article-title{font-size:34px}
  .article-card{padding:32px}
  .toc-bar{top:68px}
  .side-sticky{position:static}
  .related-band{padding-bottom:72px}
  .faq-band{padding:72px 0}
  .float-cta{width:300px;right:16px;bottom:16px}
}
@media screen and (max-width:640px){
  body{font-size:15.5px}
  .grid-container{padding:0 16px}
  .band{padding:56px 0}
  .head-band{padding:100px 0 36px}
  h1.article-title{font-size:30px;line-height:1.28}
  .meta-row{gap:8px;font-size:12.5px}
  .article-band{padding:24px 0 72px}
  .article-card{padding:20px;border-radius:14px}
  .article-body h2{font-size:21px;margin-top:32px}
  .article-body h3{font-size:18px}
  .pager{grid-template-columns:1fr}
  .pager .next{align-items:flex-start;text-align:left}
  .rel-card{flex-direction:column}
  .rel-thumb{flex:none;max-width:100%;width:100%;aspect-ratio:16/9}
  .accordion .accordion-title{padding:0 16px;font-size:15.5px;min-height:60px}
  .accordion .accordion-content{padding:0 16px 18px 16px}
  .cta-band{padding:64px 0 96px}
  .cta-band h2{font-size:24px}
  .site-footer{padding-top:56px}
  .float-cta{
    left:0;right:0;bottom:0;width:auto;border-radius:0;
    padding:12px 14px calc(12px + env(safe-area-inset-bottom));
    transform:translateY(100%);
    border-left:none;border-right:none;border-bottom:none;
  }
  .float-cta.is-on{transform:translateY(0)}
  .float-cta .fc-text{font-size:12.5px}
  .float-cta .fc-close{top:-12px;right:10px}
  .float-cta .btn{min-height:44px;padding:0 16px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}
@media print{
  body{background:#fff;color:#000}
  .site-header,.float-cta,.toc-bar,.side-sticky,.cta-band,.site-footer,.pager,.share-group,.related-band{display:none !important}
  .article-band{background:#fff;padding:0}
  .article-card{box-shadow:none;border:none;padding:0;max-width:100%}
  .article-body p,.article-body li{color:#000}
}

/* roulang page: category1 */
:root{
  --ink-900:#060F17;
  --ink-800:#0A1B27;
  --ink-700:#0F2634;
  --primary:#17B6D8;
  --primary-hover:#2AC8E8;
  --primary-press:#0F93B4;
  --primary-400:#5BD7F0;
  --accent:#FF7A3D;
  --bg-light:#F2F7FA;
  --line-light:#DDE7EE;
  --ok:#37D67A;
  --warn:#F5B23C;
  --err:#F0554F;
  --text-1:#EAF4FA;
  --text-2:#A8BECB;
  --text-3:#6E8794;
  --lt-1:#10222C;
  --lt-2:#4A6270;
  --lt-3:#7C8F9A;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"DIN Alternate","Barlow","Roboto Mono",ui-monospace,monospace;
  --r-card:18px;
  --r-img:16px;
  --r-input:12px;
  --r-pill:999px;
  --r-cta:12px;
  --line-dark:rgba(255,255,255,.08);
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
  --shadow-light:0 10px 28px -18px rgba(16,44,60,.28);
  --glass-bg:rgba(255,255,255,.06);
  --glass-line:rgba(255,255,255,.10);
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
a{color:var(--primary-400);text-decoration:none;transition:color var(--ease)}
a:hover{text-decoration:underline}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary-400);outline-offset:2px}
::selection{background:rgba(23,182,216,.32)}

/* 容器与栅格 */
.grid-container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;width:100%}
.grid-container.full{max-width:100%}
@media (min-width:1440px){.grid-container{max-width:1280px}}
.grid-x{display:flex;flex-wrap:wrap}
.grid-padding-x{margin-left:-12px;margin-right:-12px}
.grid-padding-x>.cell{padding-left:12px;padding-right:12px}
.cell{min-width:0}

/* 导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),box-shadow var(--ease),backdrop-filter var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,27,39,.78);
  border-bottom:1px solid var(--line-dark);
  box-shadow:0 14px 34px -22px rgba(0,0,0,.9);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(160deg,var(--primary) 0%,var(--primary-press) 100%);
  color:#04161E;font-weight:800;font-size:19px;letter-spacing:0;
  box-shadow:0 0 0 1px rgba(23,182,216,.35),0 10px 26px -12px rgba(23,182,216,.65);
}
.brand-text{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:-.01em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--primary-400);margin-left:4px}
.nav-links{display:flex;align-items:center;gap:4px;margin:0}
.nav-links li{list-style:none}
.nav-links a{
  display:inline-flex;align-items:center;height:44px;padding:0 14px;
  color:var(--text-2);font-size:15px;font-weight:500;position:relative;border-radius:10px;
}
.nav-links a:hover{color:var(--text-1);text-decoration:none;background:rgba(255,255,255,.05)}
.nav-links a.is-current{color:var(--primary-400)}
.nav-links a.is-current::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-dark);background:rgba(255,255,255,.05);
  color:var(--text-1);cursor:pointer;font-size:17px;
  transition:background var(--ease),border-color var(--ease)
}
.nav-toggle:hover{background:rgba(23,182,216,.14);border-color:rgba(23,182,216,.4)}

/* 抽屉 */
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);z-index:80;
  background:rgba(9,23,34,.96);
  border-left:1px solid var(--line-dark);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  transform:translateX(102%);
  transition:transform 240ms ease-out;
  padding:22px 20px 28px;display:flex;flex-direction:column;gap:6px;
  overflow-y:auto;
}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-dark);
  background:rgba(255,255,255,.05);color:var(--text-1);cursor:pointer;font-size:17px
}
.nav-drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;padding:0 12px;color:var(--text-1);font-size:16px;
  border-radius:12px;border-bottom:1px solid rgba(255,255,255,.06);
}
.nav-drawer a.drawer-link:hover{background:rgba(255,255,255,.05);text-decoration:none}
.nav-drawer a.drawer-link.is-current{color:var(--primary-400)}
.drawer-foot{margin-top:18px}
.drawer-foot .btn{width:100%;justify-content:center}
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,11,17,.62);z-index:70;opacity:0;pointer-events:none;
  transition:opacity var(--ease)
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
body.no-scroll{overflow:hidden}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 20px;border-radius:var(--r-cta);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;text-decoration:none;
  transition:transform var(--ease),background var(--ease),border-color var(--ease),box-shadow var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn:hover{text-decoration:none}
.btn i{font-size:15px}
.btn-primary{
  background:var(--primary);color:#04161E;
  box-shadow:0 0 0 1px rgba(23,182,216,.35),0 10px 32px -8px rgba(23,182,216,.55);
}
.btn-primary:hover{
  background:var(--primary-hover);transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(42,200,232,.45),0 16px 40px -8px rgba(23,182,216,.72);
}
.btn-primary:active{background:var(--primary-press);transform:translateY(0)}
.btn-outline{
  background:transparent;color:var(--primary-400);
  border:1px solid rgba(23,182,216,.5);
}
.btn-outline:hover{background:rgba(23,182,216,.08);border-color:var(--primary);color:var(--primary-400);transform:translateY(-2px)}
.btn-quiet{
  background:rgba(255,255,255,.05);color:var(--text-1);border:1px solid var(--line-dark);
}
.btn-quiet:hover{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-link{
  display:inline-flex;align-items:center;gap:8px;color:var(--primary-400);
  background:none;border:0;padding:0;font-size:14px;font-weight:600;min-height:44px;
  text-decoration:none;position:relative;
}
.btn-link::after{
  content:"";position:absolute;left:0;right:26px;bottom:11px;height:1px;background:var(--primary-400);
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease)
}
.btn-link:hover{text-decoration:none}
.btn-link:hover::after{transform:scaleX(1)}
.btn-sm{min-height:40px;padding:0 15px;font-size:14px}
.btn-block{width:100%}

/* 通用 */
.pill{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 13px;
  border-radius:var(--r-pill);font-size:12.5px;font-weight:600;letter-spacing:.01em;
  background:rgba(23,182,216,.12);color:var(--primary-400);border:1px solid rgba(23,182,216,.28);
}
.pill-glass{background:var(--glass-bg);border:1px solid var(--glass-line);color:var(--text-2)}
.section{padding:96px 0;position:relative}
.section-tight{padding:72px 0}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head h2{font-size:32px;line-height:1.3;font-weight:650;letter-spacing:-.01em;color:var(--text-1)}
.sec-head p{margin-top:14px;color:var(--text-2);font-size:16px;max-width:720px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.light-band{background:var(--bg-light);color:var(--lt-1)}
.light-band .sec-head h2{color:var(--lt-1)}
.light-band .sec-head p{color:var(--lt-2)}
.divider{height:1px;background:var(--line-dark);border:0;margin:0}
.eyebrow{
  font-family:var(--font-num);font-size:12.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--primary-400);font-weight:600;
}

/* 面包屑 */
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);overflow-x:auto;white-space:nowrap;padding-bottom:4px;scrollbar-width:none}
.crumbs::-webkit-scrollbar{display:none}
.crumbs a{color:var(--text-3);text-decoration:none}
.crumbs a:hover{color:var(--primary-400);text-decoration:none}
.crumbs .cur{color:var(--text-1)}

/* 分类页矮 Hero */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--ink-800);
  padding-top:126px;padding-bottom:64px;
  min-height:380px;
  border-bottom:1px solid var(--line-dark);
}
.hero-grid-bg{
  position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:52px 52px;
}
.hero-glow{
  position:absolute;top:-180px;right:-120px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,182,216,.11) 0%,rgba(23,182,216,0) 68%);
  pointer-events:none;
}
.cat-hero .grid-container{position:relative;z-index:2}
.hero-row{margin-top:26px}
.hero-copy h1{
  font-size:44px;line-height:1.22;font-weight:700;letter-spacing:-.01em;
  margin:18px 0 16px;color:var(--text-1);max-width:16em;
}
.hero-sub{font-size:17px;line-height:1.8;color:var(--text-2);max-width:600px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero-media{
  border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line-dark);
  box-shadow:var(--shadow-card);background:var(--ink-700);
}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}

/* 时间轴 */
.timeline{position:relative;padding-left:0}
.timeline::before{
  content:"";position:absolute;left:23px;top:24px;bottom:24px;width:1px;
  background:repeating-linear-gradient(to bottom,rgba(23,182,216,.55) 0 6px,transparent 6px 12px);
}
.tl-item{display:grid;grid-template-columns:48px 1fr;gap:24px;align-items:flex-start}
.tl-item + .tl-item{margin-top:40px}
.tl-node{
  width:48px;height:48px;border-radius:50%;display:grid;place-items:center;
  background:var(--ink-700);border:1px solid rgba(23,182,216,.42);color:var(--primary-400);
  font-family:var(--font-num);font-size:16px;font-weight:700;font-variant-numeric:tabular-nums;
  position:relative;z-index:2;box-shadow:0 0 0 6px rgba(10,27,39,1);
}
.tl-card{
  background:var(--ink-700);border:1px solid var(--line-dark);border-radius:var(--r-card);
  padding:26px 28px;box-shadow:var(--shadow-card);
  transition:transform var(--ease),border-color var(--ease)
}
.tl-card:hover{transform:translateY(-4px);border-color:rgba(23,182,216,.4)}
.tl-card h3{font-size:20px;font-weight:600;color:var(--text-1);margin-bottom:10px}
.tl-card p{color:var(--text-2);font-size:15.5px;line-height:1.85}
.tl-shot{
  margin-top:18px;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line-dark);
  max-width:520px;
}
.tl-shot img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--ease)}
.tl-shot:hover img{transform:scale(1.03)}
.tl-note{
  display:inline-flex;align-items:center;gap:8px;margin-top:14px;font-size:13px;color:var(--text-3);
}
.tl-note i{color:var(--warn)}

/* 准备清单 */
.check-panel{
  background:var(--ink-700);border:1px solid var(--line-dark);border-radius:var(--r-card);
  padding:30px 30px 24px;box-shadow:var(--shadow-card);
}
.check-list li{
  display:flex;gap:14px;align-items:flex-start;padding:14px 0;
  border-bottom:1px dashed rgba(255,255,255,.09);color:var(--text-2);font-size:15.5px;
}
.check-list li:last-child{border-bottom:0}
.check-list i{
  flex:0 0 22px;width:22px;height:22px;margin-top:5px;border-radius:7px;display:grid;place-items:center;
  background:rgba(23,182,216,.14);color:var(--primary-400);font-size:11px;
}
.check-list strong{display:block;color:var(--text-1);font-weight:600;margin-bottom:2px}
.media-frame{
  border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line-dark);
  box-shadow:var(--shadow-card);background:var(--ink-700);height:100%;
}
.media-frame img{width:100%;height:100%;min-height:280px;object-fit:cover}

/* 要点卡 */
.point-card{
  background:var(--ink-700);border:1px solid var(--line-dark);border-radius:var(--r-card);
  padding:30px 28px;height:100%;box-shadow:var(--shadow-card);
  transition:transform var(--ease),border-color var(--ease)
}
.point-card:hover{transform:translateY(-4px);border-color:rgba(23,182,216,.4)}
.point-card .icon-chip{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  background:rgba(23,182,216,.12);border:1px solid rgba(23,182,216,.3);color:var(--primary-400);
  font-size:18px;margin-bottom:18px;
}
.point-card h3{font-size:20px;font-weight:600;margin-bottom:12px;color:var(--text-1)}
.point-card p{color:var(--text-2);font-size:15.5px}
.point-card ul{margin-top:14px}
.point-card ul li{
  position:relative;padding-left:18px;color:var(--text-2);font-size:15px;line-height:1.8;margin-bottom:8px;
}
.point-card ul li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--primary-400);
}

/* callout 提示条 */
.tip-callout{
  margin-top:32px;background:var(--ink-700);border:1px solid var(--line-dark);
  border-left:3px solid var(--primary);border-radius:14px;
  padding:22px 26px;
}
.tip-callout h4{font-size:16px;font-weight:600;color:var(--text-1);margin-bottom:8px;display:flex;align-items:center;gap:10px}
.tip-callout h4 i{color:var(--primary-400)}
.tip-callout p{color:var(--text-2);font-size:15px;max-width:820px}

/* 玻璃卡 */
.glass-card{
  background:var(--glass-bg);
  border:1px solid var(--glass-line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-radius:var(--r-card);
  padding:30px 28px;
  position:relative;
  background-image:linear-gradient(rgba(255,255,255,.18),transparent);
  background-repeat:no-repeat;background-size:100% 1px;
  box-shadow:var(--shadow-card);
}
.glass-card h3{font-size:19px;font-weight:600;margin-bottom:16px;color:var(--text-1)}
.glass-list li{display:flex;gap:12px;align-items:flex-start;color:var(--text-2);font-size:15px;padding:9px 0}
.glass-list i{color:var(--primary-400);margin-top:6px;font-size:14px}

/* FAQ */
.faq-block{max-width:860px}
.accordion{border:1px solid var(--line-dark);border-radius:var(--r-card);overflow:hidden;background:var(--ink-700)}
.accordion-item{background:transparent;border-bottom:1px solid rgba(255,255,255,.08)}
.accordion-item:last-child{border-bottom:0}
.accordion-title{
  display:flex;align-items:center;gap:16px;min-height:64px;
  padding:12px 56px 12px 24px;background:transparent;border:0;
  color:var(--text-1);font-size:16.5px;font-weight:600;position:relative;line-height:1.6;
}
.accordion-title:hover{background:rgba(255,255,255,.03);color:var(--primary-400)}
.accordion-title .idx{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:14px;font-weight:700;
  color:var(--primary-400);flex:0 0 auto;
}
.accordion-title::before{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:20px;line-height:1;color:var(--primary-400);transition:transform var(--ease),color var(--ease);
}
.accordion-item.is-active .accordion-title::before{content:"−";transform:translateY(-50%) rotate(180deg)}
.accordion-content{
  background:transparent;border:0;color:var(--text-2);font-size:15.5px;line-height:1.85;
  padding:0 56px 22px 72px;
}
.accordion-content p{max-width:760px}

/* CTA 带 */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink-900);
  border-top:1px solid var(--line-dark);border-bottom:1px solid var(--line-dark);
  padding:86px 0;
}
.cta-band::before{
  content:"";position:absolute;left:50%;top:-160px;transform:translateX(-50%);
  width:760px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(23,182,216,.16) 0%,rgba(23,182,216,0) 70%);
  pointer-events:none;
}
.cta-band .grid-container{position:relative;z-index:2;text-align:center}
.cta-band h2{font-size:32px;font-weight:650;line-height:1.3;letter-spacing:-.01em}
.cta-band p{margin:16px auto 30px;color:var(--text-2);max-width:620px;font-size:16px}
.cta-inline-note{margin-top:16px;font-size:13px;color:var(--text-3)}

/* 页脚 */
.site-footer{
  background:var(--ink-900);border-top:1px solid var(--line-dark);
  padding:64px 0 30px;color:var(--text-2);
}
.footer-grid{margin-bottom:8px}
.footer-brand .brand{display:inline-flex;align-items:center;gap:10px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-3);max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:var(--text-2);font-size:14.5px;text-decoration:none}
.footer-col ul li a:hover{color:var(--primary-400);text-decoration:none}
.ft-text{font-size:14px;color:var(--text-3);line-height:1.8;margin-bottom:10px}
.footer-bottom{
  margin-top:38px;padding-top:22px;border-top:1px solid var(--line-dark);
  text-align:center;font-size:12.5px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--primary-400)}

/* 底部固定转化条 */
.sticky-cta{
  position:fixed;right:24px;bottom:24px;z-index:55;width:336px;
  background:rgba(15,38,52,.86);
  border:1px solid var(--glass-line);
  border-radius:16px;
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card);
  padding:16px 16px 16px 18px;
  display:flex;align-items:center;gap:14px;
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity 220ms ease-out,transform 220ms ease-out;
}
.sticky-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.sticky-cta .sk-text{flex:1;min-width:0}
.sticky-cta .sk-text strong{display:block;font-size:14px;color:var(--text-1);font-weight:600}
.sticky-cta .sk-text span{display:block;font-size:12.5px;color:var(--text-3);margin-top:2px}
.sticky-cta .sk-close{
  position:absolute;top:6px;right:6px;width:26px;height:26px;border-radius:8px;
  border:0;background:transparent;color:var(--text-3);cursor:pointer;font-size:13px;
}
.sticky-cta .sk-close:hover{color:var(--text-1);background:rgba(255,255,255,.08)}

/* 空态 */
.empty-state{
  text-align:center;padding:52px 24px;border-radius:var(--r-card);
  background:rgba(255,255,255,.04);border:1px dashed var(--line-dark);
}
.empty-state i{font-size:44px;color:var(--text-3);margin-bottom:16px;display:block}
.empty-state p{color:var(--text-2);margin-bottom:20px}

/* 动效偏好 */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
}

/* 响应式 */
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-actions .btn-quiet{display:none}
  .section{padding:72px 0}
  .sec-head h2{font-size:26px}
  .hero-copy h1{font-size:34px}
  .cat-hero{padding-top:112px;padding-bottom:52px}
  .hero-media{margin-top:32px}
  .timeline::before{left:19px}
  .tl-item{grid-template-columns:40px 1fr;gap:18px}
  .tl-node{width:40px;height:40px;font-size:14px}
  .cta-band h2{font-size:26px}
}
@media (max-width:639px){
  body{padding-bottom:72px}
  .grid-container{padding-left:16px;padding-right:16px}
  .grid-padding-x{margin-left:-8px;margin-right:-8px}
  .grid-padding-x>.cell{padding-left:8px;padding-right:8px}
  .section{padding:56px 0}
  .sec-head{margin-bottom:32px}
  .sec-head h2{font-size:24px}
  .hero-copy h1{font-size:30px}
  .hero-sub{font-size:15.5px}
  .hero-cta .btn{width:100%}
  .cat-hero{min-height:auto;padding-top:104px;padding-bottom:44px}
  .hero-media img{aspect-ratio:16/9}
  .tl-card{padding:20px 18px}
  .tl-card p, .point-card p, .check-list li{font-size:15px}
  .point-card{padding:24px 20px}
  .accordion-title{padding:12px 48px 12px 18px;font-size:15.5px}
  .accordion-content{padding:0 18px 20px 18px}
  .cta-band{padding:64px 0}
  .sticky-cta{
    right:0;left:0;bottom:0;width:100%;border-radius:14px 14px 0 0;
    padding:10px 56px 12px 16px;gap:10px;
    padding-bottom:calc(12px + env(safe-area-inset-bottom,0px));
  }
  .sticky-cta .sk-text span{display:none}
  .sticky-cta .sk-text strong{font-size:13.5px}
  .sticky-cta .btn{min-height:42px;padding:0 16px;font-size:14px}
}

/* 打印 */
@media print{
  body{background:#fff;color:#000;padding:0}
  .site-header,.sticky-cta,.nav-drawer,.drawer-mask,.cta-band{display:none!important}
  .cat-hero,.section,.site-footer{background:#fff;color:#000}
  .tl-card,.point-card,.accordion{border:1px solid #ccc;box-shadow:none;background:#fff}
  a{color:#000;text-decoration:underline}
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root{
  --ink-900:#060F17;
  --ink-800:#0A1B27;
  --ink-700:#0F2634;
  --primary:#17B6D8;
  --primary-hover:#2AC8E8;
  --primary-active:#0F93B4;
  --primary-400:#5BD7F0;
  --accent:#FF7A3D;
  --bg-light:#F2F7FA;
  --line-light:#DDE7EE;
  --success:#37D67A;
  --warn:#F5B23C;
  --error:#F0554F;
  --text-1:#EAF4FA;
  --text-2:#A8BECB;
  --text-3:#6E8794;
  --lt-1:#10222C;
  --lt-2:#4A6270;
  --lt-3:#7C8F9A;
  --glass-bg:rgba(255,255,255,.06);
  --glass-bd:rgba(255,255,255,.10);
  --line-dark:rgba(255,255,255,.08);
  --r-card:18px;
  --r-img:16px;
  --r-input:12px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
  --shadow-light:0 10px 28px -18px rgba(16,44,60,.28);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
  --font-num:"DIN Alternate","Barlow","Roboto Mono",ui-monospace,monospace;
  --sp:8px;
}

/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-800);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  padding-bottom:96px;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--primary-400);text-decoration:none;transition:color .18s ease-out,border-color .18s ease-out,opacity .18s ease-out;}
a:hover{color:var(--primary-hover);}
h1,h2,h3,h4{margin:0;color:var(--text-1);letter-spacing:-0.01em;}
h1{font-size:44px;line-height:1.22;font-weight:700;}
h2{font-size:32px;line-height:1.3;font-weight:650;}
h3{font-size:20px;line-height:1.5;font-weight:600;}
p{margin:0 0 16px;color:var(--text-2);}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary-400);outline-offset:2px;border-radius:6px;}

.grid-container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}
@media screen and (min-width:1440px){
  .grid-container{max-width:1280px;}
}
.grid-x{margin-left:-12px;margin-right:-12px;}
.cell{padding-left:12px;padding-right:12px;}

/* ===== 通用板块 ===== */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--primary-400);letter-spacing:.06em;
  border:1px solid rgba(23,182,216,.35);border-radius:999px;
  padding:4px 14px;margin-bottom:16px;background:rgba(23,182,216,.10);
}
.section-head p{margin-top:12px;font-size:16px;color:var(--text-2);max-width:680px;}

/* ===== 导航 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.site-header.is-stuck{
  background:rgba(10,27,39,.82);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line-dark);
  box-shadow:0 14px 32px -22px rgba(0,0,0,.9);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;height:76px;
}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,var(--primary),var(--primary-active));
  color:#04141B;font-weight:700;font-size:17px;
  box-shadow:0 0 0 1px rgba(23,182,216,.35),0 10px 26px -12px rgba(23,182,216,.6);
}
.brand-text{font-size:17px;font-weight:650;letter-spacing:0;}
.brand-text em{font-style:normal;color:var(--primary-400);}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{
  position:relative;color:var(--text-2);font-size:15px;padding:6px 0;display:inline-block;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--primary);border-radius:2px;transform:scaleX(0);
  transform-origin:left center;transition:transform .2s ease-out;
}
.nav-links a:hover{color:var(--text-1);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-current{color:var(--primary-400);}
.nav-links a.is-current::after{transform:scaleX(1);}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-dark);background:var(--glass-bg);
  color:var(--text-1);font-size:17px;cursor:pointer;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn i{font-size:15px;}
.btn-sm{min-height:44px;padding:0 18px;font-size:14px;}
.btn-primary{
  background:var(--primary);color:#04141B;
  box-shadow:0 0 0 1px rgba(23,182,216,.35),0 10px 32px -8px rgba(23,182,216,.55);
}
.btn-primary:hover{
  background:var(--primary-hover);color:#04141B;transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(23,182,216,.5),0 16px 40px -8px rgba(23,182,216,.7);
}
.btn-primary:active{background:var(--primary-active);transform:translateY(0);}
.btn-outline{
  background:transparent;color:var(--primary-400);border-color:rgba(23,182,216,.55);
}
.btn-outline:hover{background:rgba(23,182,216,.10);color:var(--primary-hover);transform:translateY(-2px);}
.btn-quiet{
  background:var(--glass-bg);color:var(--text-1);border-color:var(--glass-bd);
}
.btn-quiet:hover{background:rgba(255,255,255,.11);color:var(--text-1);transform:translateY(-2px);}
.btn-block{width:100%;}
.link-ghost{
  color:var(--primary-400);font-size:14px;font-weight:600;border-bottom:1px solid rgba(91,215,240,.4);
}
.link-ghost:hover{border-bottom-color:var(--primary-hover);}

/* ===== 面包屑 ===== */
.crumbs-bar{padding-top:110px;}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3);}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--primary-400);}
.crumbs .sep{color:rgba(110,135,148,.7);}
.crumbs .last{color:var(--text-1);}

/* ===== 页面 Hero ===== */
.page-hero{position:relative;padding:40px 0 64px;overflow:hidden;}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(520px 320px at 88% 12%,rgba(23,182,216,.12),transparent 70%),
    linear-gradient(180deg,rgba(10,27,39,0) 0%,rgba(10,27,39,.6) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.95;
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:72px 72px;opacity:.5;
}
.page-hero .hero-inner{max-width:760px;}
.page-hero h1{margin-bottom:18px;}
.page-hero .lead{font-size:17px;line-height:1.85;color:var(--text-2);max-width:640px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:5px 13px;border-radius:999px;
  background:var(--glass-bg);border:1px solid var(--glass-bd);color:var(--text-2);
}
.tag-accent{background:rgba(23,182,216,.12);border-color:rgba(23,182,216,.32);color:var(--primary-400);}

/* ===== 双栏：锚点 + 内容 ===== */
.layout-body{padding:24px 0 96px;}
.anchor-col{position:relative;}
.anchor-nav{
  position:sticky;top:100px;
  background:var(--glass-bg);border:1px solid var(--glass-bd);border-radius:var(--r-card);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  padding:22px 18px;box-shadow:var(--shadow-card);
}
.anchor-nav::before{
  content:"";position:absolute;left:0;top:0;right:0;height:1px;
  background:linear-gradient(rgba(255,255,255,.18),transparent);border-radius:var(--r-card) var(--r-card) 0 0;
}
.anchor-title{font-size:14px;color:var(--text-3);letter-spacing:.08em;margin-bottom:14px;font-weight:600;}
.anchor-list li{margin-bottom:4px;}
.anchor-list a{
  display:flex;align-items:center;gap:10px;min-height:44px;
  padding:8px 12px;border-radius:10px;color:var(--text-2);font-size:14px;
  border-left:2px solid transparent;transition:all .18s ease-out;
}
.anchor-list a span.n{font-family:var(--font-num);font-variant-numeric:tabular-nums;color:var(--text-3);font-size:13px;}
.anchor-list a:hover{background:rgba(255,255,255,.06);color:var(--text-1);}
.anchor-list a.is-active{
  background:rgba(23,182,216,.12);color:var(--primary-400);border-left-color:var(--primary);
}
.anchor-list a.is-active span.n{color:var(--primary-400);}
.anchor-note{
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line-dark);
  font-size:13px;line-height:1.6;color:var(--text-3);
}

/* ===== 内容分组 ===== */
.group{margin-bottom:56px;scroll-margin-top:110px;}
.group:last-child{margin-bottom:0;}
.group-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:22px;}
.group-num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:15px;color:var(--accent);font-weight:700;
  border:1px solid rgba(255,122,61,.4);border-radius:999px;padding:3px 12px;
  line-height:1.5;flex:0 0 auto;margin-top:4px;
}
.group-head h2{font-size:26px;line-height:1.35;}
.group-head p{margin:8px 0 0;font-size:15px;color:var(--text-3);max-width:640px;}

/* ===== 折叠面板 ===== */
.accordion{background:transparent;border:none;margin:0;}
.accordion .accordion-item{
  background:rgba(255,255,255,.04);border:1px solid var(--line-dark);
  border-radius:14px;margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease-out,background .2s ease-out;
}
.accordion .accordion-item:hover{border-color:rgba(23,182,216,.32);}
.accordion .accordion-item.is-active{background:rgba(23,182,216,.06);border-color:rgba(23,182,216,.35);}
.accordion .accordion-title{
  position:relative;display:flex;align-items:center;gap:14px;
  min-height:64px;padding:14px 64px 14px 20px;
  background:transparent;border:none;color:var(--text-1);
  font-size:16px;font-weight:600;line-height:1.5;
}
.accordion .accordion-title:hover{color:var(--primary-400);background:transparent;}
.accordion .accordion-title .qi{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:13px;color:var(--primary-400);flex:0 0 auto;
}
.accordion .accordion-title::after{
  content:"";position:absolute;right:22px;top:50%;width:14px;height:2px;
  background:var(--primary);transform:translateY(-50%);border-radius:2px;
}
.accordion .accordion-title::before{
  content:"";position:absolute;right:28px;top:50%;width:2px;height:14px;
  background:var(--primary);transform:translateY(-50%);border-radius:2px;
  transition:transform .22s ease-out,opacity .22s ease-out;
}
.accordion .accordion-item.is-active .accordion-title::before{transform:translateY(-50%) rotate(90deg);opacity:0;}
.accordion .accordion-content{
  background:transparent;border:none;padding:0 20px 20px 20px;color:var(--text-2);
}
.accordion .accordion-content p{
  max-width:720px;font-size:15.5px;line-height:1.85;margin-bottom:12px;color:var(--text-2);
}
.accordion .accordion-content p:last-child{margin-bottom:0;}
.accordion .accordion-content strong{color:var(--text-1);font-weight:600;}
.plain-list{margin:0 0 12px;max-width:720px;}
.plain-list li{
  position:relative;padding-left:18px;font-size:15.5px;line-height:1.85;color:var(--text-2);margin-bottom:6px;
}
.plain-list li::before{
  content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:2px;background:var(--primary);
}

/* ===== 正例 / 反例对比 ===== */
.compare-section{padding:8px 0 96px;}
.compare-card{
  border-radius:var(--r-card);border:1px solid var(--line-dark);
  background:rgba(255,255,255,.03);padding:30px 26px;height:100%;
  box-shadow:var(--shadow-card);
}
.compare-card h3{display:flex;align-items:center;gap:10px;font-size:19px;margin-bottom:18px;}
.compare-card h3 i{font-size:18px;}
.compare-card.ok h3 i{color:var(--success);}
.compare-card.bad h3 i{color:var(--warn);}
.compare-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.08);
  font-size:15px;line-height:1.75;color:var(--text-2);
}
.compare-list li:last-child{border-bottom:none;}
.compare-list i{margin-top:6px;font-size:14px;flex:0 0 auto;}
.compare-card.ok .compare-list i{color:var(--success);}
.compare-card.bad .compare-list i{color:var(--warn);}

/* ===== 安全提示玻璃卡 ===== */
.safety-callout{
  border-radius:var(--r-card);
  background:var(--glass-bg);border:1px solid var(--glass-bd);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card);
  padding:38px 34px;position:relative;overflow:hidden;
}
.safety-callout::before{
  content:"";position:absolute;left:0;top:0;right:0;height:1px;
  background:linear-gradient(rgba(255,255,255,.18),transparent);
}
.safety-callout h2{font-size:26px;margin-bottom:10px;}
.safety-callout > p{max-width:660px;font-size:15.5px;color:var(--text-2);}
.safety-points{margin:26px 0 28px;}
.safety-points li{
  display:flex;gap:14px;align-items:flex-start;padding:14px 0;
  border-top:1px solid var(--line-dark);
}
.safety-points li:first-child{border-top:none;}
.safety-points .pi{
  flex:0 0 40px;width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(23,182,216,.12);border:1px solid rgba(23,182,216,.28);
  color:var(--primary-400);font-size:16px;
}
.safety-points h3{font-size:16px;margin-bottom:4px;}
.safety-points p{margin:0;font-size:14.5px;line-height:1.7;color:var(--text-2);}
.callout-note{
  border-left:3px solid var(--primary);background:rgba(23,182,216,.08);
  border-radius:0 12px 12px 0;padding:14px 18px;font-size:14.5px;color:var(--text-2);margin-bottom:24px;
}

/* ===== 相关分类卡片 ===== */
.rel-section{padding:96px 0;background:var(--bg-light);}
.rel-section h2{color:var(--lt-1);}
.rel-section .section-head p{color:var(--lt-2);}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.rel-card{
  display:block;background:#fff;border:1px solid var(--line-light);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-light);
  transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(23,182,216,.5);box-shadow:0 20px 40px -24px rgba(16,44,60,.45);}
.rel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#DCE6ED;}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease-out;}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:20px 20px 24px;}
.rel-body .tag{background:rgba(23,182,216,.12);border-color:rgba(23,182,216,.3);color:var(--primary-active);}
.rel-body h3{font-size:18px;color:var(--lt-1);margin:14px 0 8px;line-height:1.45;}
.rel-body p{font-size:14.5px;line-height:1.75;color:var(--lt-2);margin:0 0 14px;}
.rel-more{font-size:14px;font-weight:600;color:var(--primary-active);display:inline-flex;align-items:center;gap:8px;}
.rel-card:hover .rel-more i{transform:translateX(4px);}
.rel-more i{transition:transform .2s ease-out;}

/* ===== 底部转化带 ===== */
.final-cta{
  position:relative;padding:72px 0;background:var(--ink-700);
  border-top:1px solid var(--line-dark);overflow:hidden;
}
.final-cta::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(560px 260px at 50% 0%,rgba(23,182,216,.16),transparent 70%);
  pointer-events:none;
}
.final-cta .inner{position:relative;text-align:center;max-width:720px;margin:0 auto;}
.final-cta h2{margin-bottom:14px;}
.final-cta p{font-size:16px;color:var(--text-2);margin-bottom:26px;}
.final-cta .cta-row{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--ink-900);border-top:1px solid var(--line-dark);
  padding:64px 0 28px;color:var(--text-2);
}
.footer-grid{padding-bottom:32px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--text-3);max-width:340px;}
.footer-col h4{font-size:14px;color:var(--text-1);margin-bottom:16px;font-weight:600;letter-spacing:.04em;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:var(--text-3);}
.footer-col ul a:hover{color:var(--primary-400);}
.ft-text{font-size:13.5px;line-height:1.75;color:var(--text-3);margin-bottom:10px;}
.footer-bottom{
  border-top:1px solid var(--line-dark);padding-top:22px;
  text-align:center;font-size:12.5px;color:var(--text-3);line-height:1.8;
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary-400);}

/* ===== 底部固定转化条 ===== */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;width:340px;
  background:rgba(15,38,52,.86);
  border:1px solid var(--glass-bd);border-radius:16px;
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 22px 48px -22px rgba(0,0,0,.9);
  padding:18px 18px 16px;
  display:flex;flex-direction:column;gap:12px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .22s ease-out,transform .22s ease-out,visibility .22s;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta .float-head{display:flex;align-items:flex-start;gap:10px;padding-right:26px;}
.float-cta .float-head i{color:var(--primary-400);font-size:16px;margin-top:4px;}
.float-cta .float-head p{margin:0;font-size:13.5px;line-height:1.6;color:var(--text-2);}
.float-cta .float-close{
  position:absolute;right:10px;top:10px;width:30px;height:30px;border-radius:9px;
  border:1px solid var(--line-dark);background:transparent;color:var(--text-3);
  cursor:pointer;font-size:13px;display:inline-flex;align-items:center;justify-content:center;
  transition:color .18s ease-out,border-color .18s ease-out;
}
.float-cta .float-close:hover{color:var(--text-1);border-color:rgba(255,255,255,.25);}

/* ===== 移动抽屉 ===== */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86%;max-width:360px;z-index:90;
  background:rgba(8,20,30,.96);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-left:1px solid var(--glass-bd);
  transform:translateX(102%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;padding:22px 20px 26px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-head .brand-text{font-size:16px;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-dark);
  background:var(--glass-bg);color:var(--text-1);cursor:pointer;font-size:16px;
}
.drawer-links{flex:1 1 auto;overflow-y:auto;}
.drawer-links a{
  display:flex;align-items:center;justify-content:space-between;
  height:52px;padding:0 4px;border-bottom:1px solid var(--line-dark);
  color:var(--text-2);font-size:15px;
}
.drawer-links a i{color:var(--text-3);font-size:13px;}
.drawer-links a.is-current{color:var(--primary-400);}
.drawer .btn{margin-top:18px;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(3,10,16,.6);z-index:85;
  opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ===== 动效偏好 ===== */
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* ===== 断点 ===== */
@media screen and (max-width:1024px){
  h1{font-size:34px;}
  h2{font-size:26px;}
  .section{padding:72px 0;}
  .nav-links{display:none;}
  .nav-actions .btn-quiet{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .rel-grid{grid-template-columns:1fr 1fr;}
  .anchor-nav{position:static;margin-bottom:28px;}
  .anchor-list{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch;}
  .anchor-list li{margin-bottom:0;flex:0 0 auto;}
  .anchor-list a{white-space:nowrap;border-left:none;border-bottom:2px solid transparent;min-height:40px;}
  .anchor-list a.is-active{border-bottom-color:var(--primary);}
  .anchor-note{display:none;}
  .group-head h2{font-size:22px;}
}

@media screen and (max-width:640px){
  body{font-size:15.5px;padding-bottom:112px;}
  h1{font-size:30px;}
  .grid-container{padding-left:16px;padding-right:16px;}
  .grid-x{margin-left:-8px;margin-right:-8px;}
  .cell{padding-left:8px;padding-right:8px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .crumbs-bar{padding-top:96px;}
  .page-hero{padding:28px 0 48px;}
  .page-hero .lead{font-size:15.5px;}
  .nav-wrap{height:66px;}
  .brand-text{font-size:15px;}
  .rel-grid{grid-template-columns:1fr;}
  .compare-card{padding:24px 18px;margin-bottom:16px;}
  .safety-callout{padding:26px 20px;}
  .float-cta{
    left:0;right:0;bottom:0;width:100%;border-radius:0;
    border-left:none;border-right:none;border-bottom:none;
    flex-direction:row;align-items:center;justify-content:space-between;
    gap:12px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  }
  .float-cta .float-head{padding-right:0;}
  .float-cta .float-head p{font-size:12.5px;line-height:1.4;}
  .float-cta .float-close{display:none;}
  .float-cta .btn{flex:0 0 auto;}
  .footer-brand p{max-width:100%;}
  .final-cta{padding:56px 0;}
}

@media print{
  body{background:#fff;color:#000;padding:0;}
  .site-header,.float-cta,.drawer,.drawer-mask,.final-cta{display:none !important;}
  .safety-callout,.compare-card,.anchor-nav{border:1px solid #ccc;background:#fff;box-shadow:none;}
  h1,h2,h3,p,li{color:#000;}
}