/* roulang page: index */
:root{
  --ink-900:#0f1330;
  --ink:#1a1f3d;
  --ink-700:#262c55;
  --ink-500:#3a4173;
  --gold:#ffb400;
  --gold-2:#ffd166;
  --gold-3:#ff9d2e;
  --cyan:#22d3ee;
  --bg:#f4f6fb;
  --surface:#ffffff;
  --surface-2:#eef1f9;
  --text:#1e2333;
  --muted:#667089;
  --muted-2:#8d95ab;
  --line:#e2e6f1;
  --ok:#2f7d54;
  --warn:#b4553a;
  --radius-sm:8px;
  --radius:12px;
  --radius-lg:20px;
  --shadow-xs:0 1px 3px rgba(20,25,55,.06);
  --shadow-sm:0 6px 18px rgba(20,25,55,.07);
  --shadow-md:0 14px 36px rgba(20,25,55,.10);
  --shadow-lg:0 28px 60px rgba(20,25,55,.16);
  --maxw:1200px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.78;
  font-size:15px;
  padding-bottom:92px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.32;font-weight:800;color:var(--ink);letter-spacing:.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input,select{font-family:inherit}
:focus-visible{outline:3px solid rgba(34,211,238,.65);outline-offset:2px;border-radius:6px}
::selection{background:rgba(255,180,0,.35)}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(15,19,48,.95);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;white-space:nowrap;letter-spacing:.5px}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  background:linear-gradient(140deg,var(--gold),var(--gold-3));
  display:grid;place-items:center;color:#1a1f3d;font-size:15px;font-weight:900;
  box-shadow:0 6px 16px rgba(255,180,0,.34);
}
.header-main{display:flex;align-items:center;gap:18px;flex:1;min-width:0}
.main-nav{display:flex;gap:4px;flex-wrap:wrap}
.main-nav a{
  padding:8px 14px;border-radius:999px;color:rgba(255,255,255,.76);
  font-size:14.5px;font-weight:600;transition:background .2s,color .2s,transform .2s;white-space:nowrap;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.09)}
.main-nav a.active{
  color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-2));
  box-shadow:0 6px 16px rgba(255,180,0,.28);
}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  border-radius:999px;padding:4px 4px 4px 14px;transition:border-color .2s,background .2s;
}
.search-box:focus-within{border-color:rgba(34,211,238,.7);background:rgba(255,255,255,.13)}
.search-box input{background:none;border:0;color:#fff;font-size:13.5px;width:148px;outline:none}
.search-box input::placeholder{color:rgba(255,255,255,.45)}
.search-box button{
  border:0;background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1f3d;
  font-weight:800;font-size:13px;padding:6px 13px;border-radius:999px;transition:filter .2s;
}
.search-box button:hover{filter:brightness(1.06)}
.lang-pill{
  border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.75);
  font-size:12.5px;padding:5px 11px;border-radius:999px;white-space:nowrap;font-weight:600;
}
.nav-toggle{
  display:none;margin-left:auto;width:40px;height:40px;border-radius:11px;
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);
  color:#fff;font-size:18px;line-height:1;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:rgba(255,255,255,.16)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:#12162e;color:#fff;padding:76px 0 68px;isolation:isolate}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.26;z-index:-2}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(620px 400px at 10% 16%, rgba(34,211,238,.30), transparent 70%),
    radial-gradient(560px 440px at 84% 6%, rgba(255,180,0,.26), transparent 70%),
    radial-gradient(760px 520px at 52% 124%, rgba(118,92,255,.34), transparent 72%),
    linear-gradient(180deg, rgba(15,19,48,.62), rgba(15,19,48,.95));
}
.hero-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 20px;
  display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
  gap:46px;align-items:center;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
  letter-spacing:.14em;color:var(--gold-2);background:rgba(255,180,0,.14);
  border:1px solid rgba(255,180,0,.28);padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.hero-title{font-size:clamp(27px,3.5vw,43px);line-height:1.25;color:#fff;letter-spacing:.6px}
.hero-title em{font-style:normal;color:var(--gold-2)}
.hero-sub{margin-top:16px;font-size:17px;font-weight:700;color:rgba(255,255,255,.9)}
.hero-desc{margin-top:14px;font-size:15.2px;line-height:1.92;color:rgba(255,255,255,.74);max-width:640px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.point-chip{
  font-size:13px;padding:7px 14px;border-radius:999px;color:rgba(255,255,255,.86);
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);
  transition:background .2s,transform .2s;
}
.point-chip:hover{background:rgba(255,255,255,.16);transform:translateY(-1px)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-weight:800;font-size:15px;
  border:1px solid transparent;transition:transform .22s,box-shadow .22s,background .22s,color .22s;
}
.btn-gold{background:linear-gradient(135deg,#ffc233,var(--gold-3));color:#1a1f3d;box-shadow:0 12px 26px rgba(255,157,46,.34)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(255,157,46,.44);color:#1a1f3d}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.24);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.17);transform:translateY(-2px);color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-700);transform:translateY(-2px);color:#fff}

.hero-panel{
  position:relative;border-radius:var(--radius-lg);padding:26px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.17);
  backdrop-filter:blur(12px);box-shadow:0 26px 60px rgba(0,0,0,.32);
}
.hero-panel .panel-badge{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:.12em;
  color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-2));
  padding:4px 12px;border-radius:999px;margin-bottom:12px;
}
.hero-panel h3{color:#fff;font-size:18px;margin-bottom:16px}
.panel-list li{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.16);font-size:13.8px;
}
.panel-list li:last-child{border-bottom:0}
.panel-list span{color:rgba(255,255,255,.55);font-weight:700;white-space:nowrap}
.panel-list b{color:rgba(255,255,255,.9);font-weight:600;text-align:right}
.panel-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}
.panel-metrics div{
  background:rgba(15,19,48,.5);border:1px solid rgba(255,255,255,.12);
  border-radius:12px;padding:12px 8px;text-align:center;
}
.panel-metrics b{display:block;color:var(--gold-2);font-size:20px;font-weight:900;line-height:1.2}
.panel-metrics span{font-size:12px;color:rgba(255,255,255,.62)}

/* ---------- stat bar ---------- */
.statbar{background:linear-gradient(100deg,#1a1f3d,#2b3160 60%,#1a1f3d)}
.statbar-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  max-width:var(--maxw);margin:0 auto;background:rgba(255,255,255,.11);
}
.stat{background:rgba(22,27,58,.92);padding:24px 18px;text-align:center}
.stat b{display:block;font-size:25px;font-weight:900;color:var(--gold-2);line-height:1.25}
.stat span{font-size:13.2px;color:rgba(255,255,255,.64)}

/* ---------- doc layout ---------- */
.doc-layout{
  display:grid;grid-template-columns:248px minmax(0,1fr);gap:28px;
  max-width:var(--maxw);margin:0 auto;padding:34px 20px 70px;align-items:start;
}
.doc-side{
  position:sticky;top:88px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:20px 14px;box-shadow:var(--shadow-xs);
}
.doc-side h2{font-size:12.5px;letter-spacing:.16em;color:var(--muted-2);margin-bottom:12px;padding-left:8px}
.doc-side ol{display:flex;flex-direction:column;gap:2px}
.doc-side a{
  display:block;padding:8px 10px;border-radius:9px;font-size:14px;color:#3d4459;
  transition:background .18s,color .18s;border-left:3px solid transparent;
}
.doc-side a:hover{background:var(--surface-2);color:var(--ink)}
.doc-side a.active{background:rgba(255,180,0,.14);color:#8a5f00;font-weight:800;border-left-color:var(--gold)}
.doc-main{display:flex;flex-direction:column;gap:26px;min-width:0}

/* ---------- blocks ---------- */
.block{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:34px 32px;box-shadow:var(--shadow-xs);
}
.block--dark{
  background:linear-gradient(150deg,#1a1f3d,#2c3364);color:#fff;border-color:transparent;
  box-shadow:var(--shadow-md);
}
.block-head{max-width:780px;margin-bottom:24px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:800;letter-spacing:.12em;
  color:#8a5f00;background:rgba(255,180,0,.15);padding:5px 13px;border-radius:999px;margin-bottom:12px;
}
.block--dark .eyebrow{color:var(--gold-2);background:rgba(255,180,0,.16)}
.block-head h2{font-size:clamp(20px,2.3vw,27px);margin-bottom:10px}
.block--dark .block-head h2{color:#fff}
.block-head p{color:var(--muted);font-size:15.2px;line-height:1.9}
.block--dark .block-head p{color:rgba(255,255,255,.74)}

.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.88fr);gap:34px;align-items:center}
.figure{border-radius:16px;overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--line)}
.figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.figure figcaption{
  font-size:12.5px;color:var(--muted);background:var(--surface);
  padding:10px 16px;border-top:1px solid var(--line);
}
.checklist li{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);
  font-size:14.8px;color:#3d4459;
}
.checklist li:last-child{border-bottom:0}
.dot{
  width:22px;height:22px;border-radius:50%;flex:none;margin-top:4px;
  background:rgba(255,180,0,.18);color:#8a5f00;display:grid;place-items:center;
  font-size:12px;font-weight:900;
}

/* bento */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.bento-item{
  grid-column:span 2;border-radius:16px;padding:24px;background:var(--surface-2);
  border:1px solid var(--line);transition:transform .24s,box-shadow .24s,border-color .24s;
}
.bento-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:rgba(255,180,0,.45)}
.bento-item.lg{
  grid-column:span 6;background:linear-gradient(140deg,#1a1f3d,#2f3768);
  color:#fff;border-color:transparent;box-shadow:var(--shadow-sm);
}
.bento-item h3{font-size:16.5px;margin-bottom:8px}
.bento-item p{font-size:14.2px;color:var(--muted);line-height:1.8}
.bento-item.lg h3{color:#fff;font-size:18px}
.bento-item.lg p{color:rgba(255,255,255,.76);max-width:760px}
.bento-icon{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(255,180,0,.2);color:#8a5f00;font-weight:900;font-size:15px;margin-bottom:14px;
}
.bento-item.lg .bento-icon{background:rgba(255,180,0,.22);color:var(--gold-2)}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.gcard{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;overflow:hidden;transition:transform .24s,box-shadow .24s;box-shadow:var(--shadow-xs);
}
.gcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.gcard img{width:100%;aspect-ratio:16/10;object-fit:cover}
.gcard-body{padding:16px 16px 20px}
.tag{
  display:inline-block;font-size:12px;font-weight:800;color:#8a5f00;
  background:rgba(255,180,0,.17);border-radius:999px;padding:3px 11px;margin-bottom:10px;
}
.gcard h3{font-size:15.2px;margin-bottom:7px}
.gcard p{font-size:13.4px;color:var(--muted);line-height:1.75}

/* channels */
.channels{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.channel{
  display:block;position:relative;overflow:hidden;padding:24px 22px;border-radius:16px;
  background:linear-gradient(160deg,#ffffff,#f5f7fd);border:1px solid var(--line);
  transition:transform .24s,box-shadow .24s,border-color .24s;
}
.channel::after{
  content:"";position:absolute;right:-30px;top:-30px;width:110px;height:110px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,180,0,.24),transparent 70%);
}
.channel:hover{transform:translateY(-3px);border-color:rgba(255,180,0,.55);box-shadow:var(--shadow-sm)}
.channel h3{font-size:16.5px;margin-bottom:8px}
.channel p{font-size:13.6px;color:var(--muted);line-height:1.75}
.channel .go{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13.5px;font-weight:800;color:#8a5f00}

/* steps */
.steps{display:grid;gap:14px}
.step{
  display:grid;grid-template-columns:auto 1fr;gap:16px;padding:18px 20px;
  border-radius:14px;background:var(--surface-2);border:1px solid var(--line);
  transition:border-color .2s,background .2s;
}
.step:hover{border-color:rgba(255,180,0,.5);background:#f6f8fe}
.step .num{
  width:34px;height:34px;border-radius:11px;background:var(--ink);color:var(--gold-2);
  display:grid;place-items:center;font-weight:900;font-size:14px;
}
.step h3{font-size:15.4px;margin-bottom:4px}
.step p{font-size:14px;color:var(--muted);line-height:1.78}

/* scenes */
.scenes{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.scene{
  padding:24px;border-radius:16px;border:1px solid var(--line);background:#fff;
  box-shadow:var(--shadow-xs);transition:transform .24s,box-shadow .24s;
}
.scene:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.scene .badge{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:.06em;color:#1a1f3d;
  background:linear-gradient(135deg,var(--gold),var(--gold-2));padding:3px 11px;
  border-radius:999px;margin-bottom:12px;
}
.scene h3{font-size:16px;margin-bottom:8px}
.scene p{font-size:14.2px;color:var(--muted);line-height:1.8}

/* quotes */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.quote{
  display:flex;flex-direction:column;gap:16px;padding:24px;border-radius:16px;
  background:var(--surface-2);border:1px solid var(--line);
}
.quote p{font-size:14.5px;color:#39405a;line-height:1.85;flex:1}
.who{display:flex;align-items:center;gap:11px}
.avatar{
  width:38px;height:38px;border-radius:50%;flex:none;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--gold),var(--gold-3));color:#1a1f3d;font-weight:900;font-size:14px;
}
.who b{display:block;font-size:14px;color:var(--ink)}
.who span{font-size:12.5px;color:var(--muted-2)}

/* compare */
.compare{
  display:grid;grid-template-columns:1fr 1fr;border-radius:16px;overflow:hidden;
  border:1px solid var(--line);background:var(--surface);
}
.compare-col{padding:28px 26px}
.compare-col.old{background:#f0f2f9}
.compare-col.new{background:linear-gradient(160deg,#1a1f3d,#2f3768);color:#fff}
.compare-col h3{font-size:16.5px;margin-bottom:16px}
.compare-col.new h3{color:#fff}
.compare-col li{
  font-size:14.4px;padding:11px 0;border-bottom:1px solid rgba(26,31,61,.08);
  display:flex;gap:10px;align-items:flex-start;color:#4a5170;
}
.compare-col li:last-child{border-bottom:0}
.compare-col.new li{border-color:rgba(255,255,255,.13);color:rgba(255,255,255,.85)}
.compare-col li i{font-style:normal;font-weight:900;color:var(--muted-2)}
.compare-col.new li i{color:var(--gold-2)}

/* myths */
.myth{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.myth-card{padding:22px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-xs)}
.myth-card .wrong{
  font-size:13.6px;color:#9c4030;background:rgba(214,92,66,.09);
  padding:9px 12px;border-radius:10px;margin-bottom:12px;line-height:1.7;
}
.myth-card .right{
  font-size:13.8px;color:#2f6b4c;background:rgba(47,125,84,.09);
  padding:9px 12px;border-radius:10px;line-height:1.75;
}
.myth-card .wrong b,.myth-card .right b{display:block;font-size:12px;letter-spacing:.1em;margin-bottom:3px;opacity:.8}

/* news */
.news-layout{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:26px;align-items:start}
.news-list{display:flex;flex-direction:column}
.news-item{display:block;padding:18px 0;border-bottom:1px dashed var(--line);transition:transform .2s}
.news-item:first-child{padding-top:0}
.news-item:last-child{border-bottom:0}
.news-item:hover{transform:translateX(3px)}
.news-item:hover .news-title{color:#8a5f00}
.news-title{display:block;font-size:16px;font-weight:800;color:var(--ink);line-height:1.55;margin-bottom:6px;transition:color .2s}
.news-desc{display:block;font-size:13.8px;color:var(--muted);line-height:1.8;margin-bottom:8px}
.news-meta{font-size:12.5px;color:var(--muted-2);letter-spacing:.02em}
.news-side{background:var(--surface-2);border:1px solid var(--line);border-radius:16px;padding:22px}
.news-side h3{font-size:15px;margin-bottom:14px}
.news-side a{
  display:block;font-size:14px;color:#3d4459;padding:10px 0;
  border-bottom:1px dashed var(--line);line-height:1.6;transition:color .2s,padding-left .2s;
}
.news-side a:last-child{border-bottom:0}
.news-side a:hover{color:#8a5f00;padding-left:4px}
.more-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:18px;
  font-size:14px;font-weight:800;color:#8a5f00;transition:gap .2s;
}
.more-link:hover{gap:11px}
.empty{font-size:14px;color:var(--muted);padding:24px 0}

/* assure */
.assure{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.assure-item{display:flex;gap:14px;padding:22px;border-radius:14px;background:var(--surface-2);border:1px solid var(--line)}
.assure-item .ico{
  width:36px;height:36px;border-radius:11px;flex:none;display:grid;place-items:center;
  background:rgba(34,211,238,.14);color:#0f7f92;font-weight:900;font-size:15px;
}
.assure-item h3{font-size:15px;margin-bottom:5px}
.assure-item p{font-size:13.5px;color:var(--muted);line-height:1.75}

/* faq */
.faq details{
  border:1px solid var(--line);border-radius:14px;background:#fff;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s,box-shadow .2s;
}
.faq details:hover{border-color:rgba(255,180,0,.5)}
.faq details[open]{box-shadow:var(--shadow-xs)}
.faq summary{
  cursor:pointer;padding:16px 20px;font-weight:800;font-size:15.2px;color:var(--ink);
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:#8a5f00;font-weight:900;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq .ans{padding:0 20px 18px;font-size:14.4px;color:var(--muted);line-height:1.9}

/* cta */
.cta-block{
  position:relative;overflow:hidden;border-radius:20px;padding:48px 34px;text-align:center;
  background:linear-gradient(140deg,#1a1f3d,#2f3768);color:#fff;box-shadow:var(--shadow-md);
}
.cta-block::before{
  content:"";position:absolute;inset:-40%;
  background:
    radial-gradient(320px 240px at 22% 20%, rgba(34,211,238,.24), transparent 70%),
    radial-gradient(340px 260px at 80% 82%, rgba(255,180,0,.24), transparent 70%);
  pointer-events:none;
}
.cta-block > *{position:relative}
.cta-block h2{color:#fff;font-size:clamp(21px,2.6vw,29px);margin-bottom:14px}
.cta-block p{color:rgba(255,255,255,.78);font-size:15px;max-width:660px;margin:0 auto 26px;line-height:1.9}

/* footer */
.site-footer{background:#0f1330;color:rgba(255,255,255,.68);padding:54px 0 26px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,1fr));gap:36px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.58);max-width:400px}
.footer-col h3{color:#fff;font-size:14px;letter-spacing:.1em;margin-bottom:14px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.62);padding:6px 0;transition:color .2s,padding-left .2s}
.footer-col a:hover{color:var(--gold-2);padding-left:4px}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.48);
}

/* float bar */
.floatbar{
  position:fixed;left:16px;right:16px;bottom:16px;z-index:90;
  max-width:920px;margin:0 auto;display:flex;align-items:center;gap:16px;justify-content:space-between;
  padding:12px 20px;border-radius:999px;background:rgba(15,19,48,.95);
  border:1px solid rgba(255,255,255,.14);backdrop-filter:blur(12px);
  box-shadow:var(--shadow-lg);color:#fff;font-size:13.8px;
}
.floatbar p{color:rgba(255,255,255,.75)}
.floatbar b{color:var(--gold-2)}
.floatbar .btn{padding:9px 20px;font-size:13.5px}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .doc-layout{grid-template-columns:220px minmax(0,1fr);gap:22px}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .news-layout{grid-template-columns:1fr}
  .hero-inner{gap:32px}
}
@media (max-width:992px){
  .nav-toggle{display:flex}
  .header-main{
    display:none;position:absolute;left:0;right:0;top:68px;
    flex-direction:column;align-items:stretch;gap:16px;
    background:#12162e;border-top:1px solid rgba(255,255,255,.08);
    border-bottom:1px solid rgba(255,255,255,.12);
    padding:18px 20px 24px;box-shadow:var(--shadow-lg);
  }
  body.nav-open .header-main{display:flex}
  .main-nav{flex-direction:column;gap:6px}
  .main-nav a{border-radius:10px;padding:10px 14px}
  .header-tools{margin-left:0;flex-wrap:wrap;gap:12px}
  .search-box{flex:1;min-width:200px}
  .search-box input{width:100%}
  .doc-layout{grid-template-columns:minmax(0,1fr);padding:24px 16px 64px}
  .doc-side{position:static;padding:16px 12px;overflow-x:auto}
  .doc-side ol{flex-direction:row;flex-wrap:nowrap;gap:8px}
  .doc-side a{white-space:nowrap;border-left:0;border-bottom:3px solid transparent;padding:7px 12px;background:var(--surface-2)}
  .doc-side a.active{border-bottom-color:var(--gold);border-left:0}
  .doc-side h2{padding-left:4px}
  .hero{padding:58px 0 52px}
  .hero-inner{grid-template-columns:1fr}
  .hero-panel{max-width:560px}
  .statbar-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:24px}
  .scenes{grid-template-columns:1fr}
  .quotes{grid-template-columns:1fr}
  .assure{grid-template-columns:1fr}
  .myth{grid-template-columns:1fr}
  .channels{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .bento-item{grid-column:span 6}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:span 2}
}
@media (max-width:640px){
  body{font-size:14.6px;padding-bottom:110px}
  .block{padding:26px 20px;border-radius:16px}
  .brand{font-size:16.5px}
  .gallery{grid-template-columns:1fr}
  .statbar-grid{grid-template-columns:1fr 1fr}
  .stat b{font-size:21px}
  .hero-title{font-size:26px}
  .hero-sub{font-size:15.5px}
  .hero-desc{font-size:14.6px}
  .btn{width:100%;padding:13px 18px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .cta-block{padding:34px 20px}
  .floatbar{
    left:10px;right:10px;bottom:10px;flex-direction:column;align-items:stretch;
    gap:10px;border-radius:18px;padding:12px 14px;text-align:center;font-size:13px;
  }
  .floatbar .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-brand{grid-column:span 1}
  .footer-bottom{flex-direction:column;gap:6px}
  .panel-metrics{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:420px){
  .wrap{padding:0 14px}
  .hero-inner{padding:0 14px}
  .panel-list li{flex-direction:column;align-items:flex-start;gap:2px}
  .panel-list b{text-align:left}
}

/* roulang page: article */
:root{
 --ink-900:#0f1330;
 --ink:#1a1f3d;
 --ink-700:#262c55;
 --ink-500:#3a4173;
 --gold:#ffb400;
 --gold-2:#ffd166;
 --gold-3:#ff9d2e;
 --cyan:#22d3ee;
 --bg:#f4f6fb;
 --surface:#ffffff;
 --surface-2:#eef1f9;
 --text:#1e2333;
 --muted:#667089;
 --muted-2:#8d95ab;
 --line:#e2e6f1;
 --ok:#2f7d54;
 --warn:#b4553a;
 --radius-sm:8px;
 --radius:12px;
 --radius-lg:20px;
 --shadow-xs:0 1px 3px rgba(20,25,55,.06);
 --shadow-sm:0 6px 18px rgba(20,25,55,.07);
 --shadow-md:0 14px 36px rgba(20,25,55,.10);
 --shadow-lg:0 28px 60px rgba(20,25,55,.16);
 --maxw:1200px;
 --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px}
body{
 margin:0;font-family:var(--font);background:var(--bg);color:var(--text);
 line-height:1.78;font-size:15px;padding-bottom:96px;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,select{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;color:var(--ink);line-height:1.35}
p{margin:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:80;
 background:rgba(15,19,48,.95);
 backdrop-filter:blur(14px);
 border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;position:relative;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;white-space:nowrap;letter-spacing:.5px}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:none;
 background:linear-gradient(140deg,var(--gold),var(--gold-3));
 display:grid;place-items:center;color:#1a1f3d;font-size:15px;font-weight:900;
 box-shadow:0 6px 16px rgba(255,180,0,.34);
}
.header-main{display:flex;align-items:center;gap:18px;flex:1;min-width:0}
.main-nav{display:flex;gap:4px;flex-wrap:wrap}
.main-nav a{
 padding:8px 14px;border-radius:999px;color:rgba(255,255,255,.76);
 font-size:14.5px;font-weight:600;transition:background .2s,color .2s,transform .2s;white-space:nowrap;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.09)}
.main-nav a.active{
 color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-2));
 box-shadow:0 6px 16px rgba(255,180,0,.28);
}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{
 display:flex;align-items:center;gap:6px;
 background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
 border-radius:999px;padding:4px 4px 4px 14px;transition:border-color .2s,background .2s;
}
.search-box:focus-within{border-color:rgba(34,211,238,.7);background:rgba(255,255,255,.13)}
.search-box input{background:none;border:0;color:#fff;font-size:13.5px;width:148px;outline:none}
.search-box input::placeholder{color:rgba(255,255,255,.45)}
.search-box button{
 border:0;background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1f3d;
 font-weight:800;font-size:13px;padding:6px 13px;border-radius:999px;transition:filter .2s;
}
.search-box button:hover{filter:brightness(1.06)}
.lang-pill{
 border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.75);
 font-size:12.5px;padding:5px 11px;border-radius:999px;white-space:nowrap;font-weight:600;
}
.nav-toggle{
 display:none;margin-left:auto;width:40px;height:40px;border-radius:11px;
 border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);
 color:#fff;font-size:18px;line-height:1;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:rgba(255,255,255,.16)}

/* ---------- article hero ---------- */
.article-hero{position:relative;overflow:hidden;background:#12162e;color:#fff;padding:34px 0 46px;isolation:isolate}
.article-hero .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.22;z-index:-2}
.article-hero::after{
 content:"";position:absolute;inset:0;z-index:-1;
 background:
 radial-gradient(560px 360px at 8% 8%, rgba(34,211,238,.24), transparent 70%),
 radial-gradient(520px 380px at 88% 0%, rgba(255,180,0,.22), transparent 70%),
 linear-gradient(180deg, rgba(15,19,48,.55), rgba(15,19,48,.96));
}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.58);margin-bottom:22px;flex-wrap:wrap}
.crumb a{color:rgba(255,255,255,.78)}
.crumb a:hover{color:var(--gold-2)}
.crumb span.sep{color:rgba(255,255,255,.3)}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.badge-cat{
 display:inline-flex;align-items:center;gap:7px;
 background:linear-gradient(135deg,rgba(255,180,0,.92),rgba(255,157,46,.92));
 color:#1a1f3d;font-weight:800;font-size:13px;padding:7px 15px;border-radius:999px;
 box-shadow:0 8px 20px rgba(255,157,46,.28);
}
.badge-line{
 display:inline-flex;align-items:center;gap:7px;
 border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.07);
 color:rgba(255,255,255,.82);font-size:12.5px;font-weight:600;padding:7px 14px;border-radius:999px;
}
.article-title{font-size:clamp(25px,3.2vw,38px);line-height:1.32;color:#fff;letter-spacing:.4px;max-width:920px}
.article-lead{margin-top:16px;font-size:15.6px;line-height:1.92;color:rgba(255,255,255,.76);max-width:820px}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px;font-size:13.5px;color:rgba(255,255,255,.62)}
.article-meta b{color:rgba(255,255,255,.9);font-weight:700}

/* ---------- layout ---------- */
.article-layout{
 display:grid;grid-template-columns:262px minmax(0,1fr);gap:34px;
 align-items:start;padding-top:38px;padding-bottom:56px;
}
.doc-side{position:sticky;top:92px}
.doc-box{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:20px 18px;
}
.doc-box h2{font-size:13px;letter-spacing:.16em;color:var(--muted-2);font-weight:800;margin-bottom:14px}
.doc-box nav{display:flex;flex-direction:column;gap:2px}
.doc-box nav a{
 font-size:14px;color:var(--ink-500);padding:9px 12px;border-radius:var(--radius-sm);
 border-left:3px solid transparent;transition:background .2s,color .2s,border-color .2s;
}
.doc-box nav a:hover{background:var(--surface-2);color:var(--ink);border-left-color:var(--gold)}
.side-note{
 margin-top:18px;background:linear-gradient(160deg,#1a1f3d,#262c55);color:#fff;
 border-radius:var(--radius);padding:18px;box-shadow:var(--shadow-md);
}
.side-note h3{color:#fff;font-size:15px;margin-bottom:8px}
.side-note p{font-size:13.4px;line-height:1.8;color:rgba(255,255,255,.72)}
.side-note .mini-tag{
 display:inline-block;margin-top:12px;font-size:12px;font-weight:700;color:#1a1f3d;
 background:linear-gradient(135deg,var(--gold),var(--gold-2));padding:5px 12px;border-radius:999px;
}
.article-main{min-width:0;display:flex;flex-direction:column;gap:26px}

/* ---------- panels & sections ---------- */
.panel{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:30px 32px;
}
.section-head{margin-bottom:22px}
.kicker{
 display:inline-block;font-size:12px;font-weight:800;letter-spacing:.16em;
 color:var(--gold-3);text-transform:uppercase;margin-bottom:8px;
}
.section-head h2{font-size:22px}
.section-head p{margin-top:8px;font-size:14.6px;color:var(--muted);line-height:1.86}
.block{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:30px 32px}
.block.alt{background:var(--surface-2)}

/* ---------- article body ---------- */
.article-body{font-size:16px;line-height:1.95;color:#2a3047}
.article-body > *:first-child{margin-top:0}
.article-body h2{
 font-size:23px;margin:34px 0 14px;padding-left:14px;
 border-left:4px solid var(--gold);color:var(--ink);
}
.article-body h3{font-size:18.5px;margin:26px 0 10px;color:var(--ink)}
.article-body h4{font-size:16.5px;margin:20px 0 8px;color:var(--ink-700)}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px}
.article-body li{margin-bottom:8px}
.article-body img{border-radius:var(--radius);margin:20px 0;box-shadow:var(--shadow-sm)}
.article-body a{color:#2b56b8;text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--gold-3)}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 13px;text-align:left}
.article-body th{background:var(--surface-2);font-weight:800;color:var(--ink)}
.article-body blockquote{
 margin:20px 0;padding:15px 20px;background:#fff8e6;
 border-left:4px solid var(--gold);border-radius:0 var(--radius) var(--radius) 0;
 color:#5a4a1e;font-size:15.2px;
}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:26px 0}
.article-empty{
 text-align:center;padding:36px 12px;
}
.article-empty .empty-title{font-size:20px;font-weight:800;color:var(--ink);margin-bottom:10px}
.article-empty p{color:var(--muted);font-size:14.6px;margin-bottom:20px}

/* ---------- buttons ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:13px 26px;border-radius:999px;font-weight:800;font-size:15px;
 border:1px solid transparent;transition:transform .22s,box-shadow .22s,background .22s,color .22s;
}
.btn:focus-visible{outline:3px solid rgba(34,211,238,.6);outline-offset:3px}
.btn-gold{background:linear-gradient(135deg,#ffc233,var(--gold-3));color:#1a1f3d;box-shadow:0 12px 26px rgba(255,157,46,.34)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(255,157,46,.44);color:#1a1f3d}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-700);transform:translateY(-2px);color:#fff}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--gold);color:var(--ink);transform:translateY(-2px)}

/* ---------- points ---------- */
.points-wrap{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:30px;align-items:start}
.points-lead h2{font-size:24px;line-height:1.4}
.points-lead p{margin-top:12px;color:var(--muted);font-size:14.8px;line-height:1.9}
.points-list{display:flex;flex-direction:column;gap:12px}
.point-item{
 display:flex;gap:14px;align-items:flex-start;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:16px 18px;box-shadow:var(--shadow-xs);
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.point-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:rgba(255,180,0,.5)}
.point-num{
 flex:none;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
 background:linear-gradient(140deg,var(--gold),var(--gold-3));color:#1a1f3d;font-weight:900;font-size:14px;
}
.point-item h3{font-size:16px;margin-bottom:4px}
.point-item p{font-size:14px;color:var(--muted);line-height:1.82}

/* ---------- rhythm ---------- */
.rhythm-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:6px}
.rhythm-card{
 position:relative;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow-xs);
 transition:transform .22s,box-shadow .22s;
}
.rhythm-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.rhythm-no{
 font-size:26px;font-weight:900;color:rgba(26,31,61,.14);letter-spacing:1px;display:block;margin-bottom:6px;
}
.rhythm-card h3{font-size:17px;margin-bottom:8px}
.rhythm-card p{font-size:14px;color:var(--muted);line-height:1.86}
.rhythm-figure{margin-top:22px;border-radius:var(--radius);overflow:hidden;position:relative;box-shadow:var(--shadow-sm)}
.rhythm-figure img{width:100%;height:240px;object-fit:cover}
.rhythm-figure figcaption{
 position:absolute;left:0;right:0;bottom:0;padding:16px 20px;
 background:linear-gradient(180deg,rgba(15,19,48,0),rgba(15,19,48,.88));
 color:#fff;font-size:13.6px;
}

/* ---------- stats ---------- */
.stats-strip{
 background:linear-gradient(135deg,#151a36,#232a55);
 border-radius:var(--radius-lg);padding:30px 32px;color:#fff;
 box-shadow:var(--shadow-md);border:1px solid rgba(255,255,255,.08);
 display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;
}
.stat-item h3{
 font-size:15px;color:#fff;margin-bottom:8px;
 display:flex;align-items:center;gap:8px;
}
.stat-item h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--gold);flex:none}
.stat-item p{font-size:13.8px;color:rgba(255,255,255,.72);line-height:1.86}
.stat-item .stat-num{font-size:22px;font-weight:900;color:var(--gold-2);display:block;margin-bottom:4px}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr);gap:30px;align-items:start}
.faq-head h2{font-size:24px}
.faq-head p{margin-top:12px;color:var(--muted);font-size:14.8px;line-height:1.9}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:18px 20px;box-shadow:var(--shadow-xs);transition:border-color .2s,box-shadow .2s;
}
.faq-item:hover{border-color:rgba(255,180,0,.5);box-shadow:var(--shadow-sm)}
.faq-item h3{font-size:15.8px;margin-bottom:8px;display:flex;gap:10px;align-items:flex-start}
.faq-item h3 .q{
 flex:none;width:22px;height:22px;border-radius:7px;display:grid;place-items:center;
 font-size:12px;font-weight:900;background:rgba(255,180,0,.16);color:#a86b00;
}
.faq-item p{font-size:14.2px;color:var(--muted);line-height:1.88}

/* ---------- detail cards ---------- */
.detail-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.detail-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 overflow:hidden;box-shadow:var(--shadow-xs);transition:transform .22s,box-shadow .22s;
}
.detail-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.detail-card img{width:100%;height:150px;object-fit:cover}
.detail-card .detail-body{padding:16px 18px 18px}
.detail-card .tag{
 display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.06em;
 color:#8a5a00;background:rgba(255,180,0,.16);padding:4px 10px;border-radius:999px;margin-bottom:9px;
}
.detail-card h3{font-size:15.6px;margin-bottom:7px;line-height:1.55}
.detail-card p{font-size:13.6px;color:var(--muted);line-height:1.84}

/* ---------- fixed cta ---------- */
.cta-bar{
 position:fixed;left:0;right:0;bottom:0;z-index:90;
 background:rgba(15,19,48,.97);backdrop-filter:blur(10px);
 border-top:1px solid rgba(255,255,255,.12);
}
.cta-inner{
 max-width:var(--maxw);margin:0 auto;padding:12px 20px;
 display:flex;align-items:center;gap:18px;justify-content:space-between;color:#fff;
}
.cta-text{font-size:14px;color:rgba(255,255,255,.82);line-height:1.6}
.cta-text b{color:var(--gold-2);font-weight:800}
.cta-inner .btn{padding:10px 22px;font-size:14px;flex:none}

/* ---------- footer ---------- */
.site-footer{background:#0f1330;color:rgba(255,255,255,.7);padding:52px 0 26px;margin-top:10px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.35fr) repeat(2,minmax(0,.85fr));gap:34px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:13.8px;line-height:1.9;color:rgba(255,255,255,.58);max-width:400px}
.footer-col h3{font-size:13px;letter-spacing:.14em;color:rgba(255,255,255,.5);margin-bottom:14px}
.footer-col a{
 display:block;font-size:13.8px;color:rgba(255,255,255,.68);padding:5px 0;
 transition:color .2s,transform .2s;
}
.footer-col a:hover{color:var(--gold-2);transform:translateX(3px)}
.footer-bottom{
 margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);
 display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
 font-size:12.8px;color:rgba(255,255,255,.42);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
 .article-layout{grid-template-columns:minmax(0,1fr);gap:26px}
 .doc-side{position:static}
 .doc-box nav{flex-direction:row;flex-wrap:wrap}
 .doc-box nav a{border-left:0;border:1px solid var(--line)}
 .points-wrap{grid-template-columns:minmax(0,1fr);gap:22px}
 .faq-wrap{grid-template-columns:minmax(0,1fr);gap:22px}
 .rhythm-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .detail-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .stats-strip{grid-template-columns:minmax(0,1fr)}
 .panel,.block{padding:24px 22px}
}
@media (max-width:860px){
 .header-main{
  display:none;position:absolute;left:0;right:0;top:100%;
  background:#0f1330;border-bottom:1px solid rgba(255,255,255,.1);
  padding:14px 20px 18px;flex-direction:column;align-items:stretch;gap:14px;
 }
 body.nav-open .header-main{display:flex}
 .nav-toggle{display:flex}
 .main-nav{flex-direction:column;gap:4px}
 .main-nav a{padding:10px 14px;border-radius:10px}
 .header-tools{margin-left:0;justify-content:space-between;flex-wrap:wrap}
 .search-box input{width:100%;min-width:120px;flex:1}
 .search-box{flex:1;min-width:190px}
 .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
 .footer-brand{grid-column:1 / -1}
}
@media (max-width:640px){
 .article-hero{padding:24px 0 34px}
 .rhythm-grid{grid-template-columns:minmax(0,1fr)}
 .detail-grid{grid-template-columns:minmax(0,1fr)}
 .article-meta{gap:8px 16px;font-size:12.8px}
 .section-head h2,.points-lead h2,.faq-head h2{font-size:20px}
 .article-body{font-size:15.4px}
 .article-body h2{font-size:20px}
 .panel,.block{padding:20px 18px}
 .stats-strip{padding:24px 20px}
 .cta-inner{padding:10px 16px;gap:10px}
 .cta-text{font-size:12.8px}
 .cta-inner .btn{padding:9px 16px;font-size:13px}
 .rhythm-figure img{height:180px}
 .footer-grid{grid-template-columns:minmax(0,1fr)}
 .doc-box nav a{font-size:13.4px}
}
@media (max-width:420px){
 .cta-text{display:none}
 .cta-inner{justify-content:center}
 .cta-inner .btn{width:100%}
}

/* roulang page: category1 */
:root{
 --ink-900:#0f1330;
 --ink:#1a1f3d;
 --ink-700:#262c55;
 --ink-500:#3a4173;
 --gold:#ffb400;
 --gold-2:#ffd166;
 --gold-3:#ff9d2e;
 --cyan:#22d3ee;
 --bg:#f4f6fb;
 --surface:#ffffff;
 --surface-2:#eef1f9;
 --text:#1e2333;
 --muted:#667089;
 --muted-2:#8d95ab;
 --line:#e2e6f1;
 --radius-sm:8px;
 --radius:12px;
 --radius-lg:20px;
 --shadow-xs:0 1px 3px rgba(20,25,55,.06);
 --shadow-sm:0 6px 18px rgba(20,25,55,.07);
 --shadow-md:0 14px 36px rgba(20,25,55,.10);
 --shadow-lg:0 28px 60px rgba(20,25,55,.16);
 --maxw:1200px;
 --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:var(--font);
 background:var(--bg);
 color:var(--text);
 font-size:15.5px;
 line-height:1.8;
 padding-bottom:96px;
 -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit}
:focus-visible{outline:3px solid rgba(255,180,0,.65);outline-offset:2px;border-radius:6px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:80;
 background:rgba(15,19,48,.95);
 backdrop-filter:blur(14px);
 border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;white-space:nowrap;letter-spacing:.5px}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:none;
 background:linear-gradient(140deg,var(--gold),var(--gold-3));
 display:grid;place-items:center;color:#1a1f3d;font-size:15px;font-weight:900;
 box-shadow:0 6px 16px rgba(255,180,0,.34);
}
.header-main{display:flex;align-items:center;gap:18px;flex:1;min-width:0}
.main-nav{display:flex;gap:4px;flex-wrap:wrap}
.main-nav a{
 padding:8px 14px;border-radius:999px;color:rgba(255,255,255,.76);
 font-size:14.5px;font-weight:600;transition:background .2s,color .2s,transform .2s;white-space:nowrap;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.09)}
.main-nav a.active{
 color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-2));
 box-shadow:0 6px 16px rgba(255,180,0,.28);
}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{
 display:flex;align-items:center;gap:6px;
 background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
 border-radius:999px;padding:4px 4px 4px 14px;transition:border-color .2s,background .2s;
}
.search-box:focus-within{border-color:rgba(34,211,238,.7);background:rgba(255,255,255,.13)}
.search-box input{background:none;border:0;color:#fff;font-size:13.5px;width:148px;outline:none}
.search-box input::placeholder{color:rgba(255,255,255,.45)}
.search-box button{
 border:0;background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1f3d;
 font-weight:800;font-size:13px;padding:6px 13px;border-radius:999px;transition:filter .2s;
}
.search-box button:hover{filter:brightness(1.06)}
.lang-pill{
 border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.75);
 font-size:12.5px;padding:5px 11px;border-radius:999px;white-space:nowrap;font-weight:600;
}
.nav-toggle{
 display:none;margin-left:auto;width:40px;height:40px;border-radius:11px;
 border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);
 color:#fff;font-size:18px;line-height:1;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:rgba(255,255,255,.16)}
/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:#12162e;color:#fff;padding:58px 0 68px;isolation:isolate}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.24;z-index:-2}
.hero::after{
 content:"";position:absolute;inset:0;z-index:-1;
 background:
 radial-gradient(620px 400px at 8% 14%, rgba(34,211,238,.26), transparent 70%),
 radial-gradient(560px 440px at 86% 4%, rgba(255,180,0,.24), transparent 70%),
 radial-gradient(760px 520px at 54% 126%, rgba(118,92,255,.32), transparent 72%),
 linear-gradient(180deg, rgba(15,19,48,.66), rgba(15,19,48,.96));
}
.hero-inner{
 display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
 gap:44px;align-items:start;
}
.hero-eyebrow{
 display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
 letter-spacing:.14em;color:var(--gold-2);background:rgba(255,180,0,.14);
 border:1px solid rgba(255,180,0,.28);padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.hero-title{font-size:clamp(26px,3.4vw,40px);line-height:1.28;color:#fff;letter-spacing:.6px}
.hero-title em{font-style:normal;color:var(--gold-2)}
.hero-lead{margin-top:18px;font-size:16.4px;font-weight:700;color:rgba(255,255,255,.92)}
.hero-desc{margin-top:12px;font-size:15px;line-height:1.95;color:rgba(255,255,255,.74);max-width:620px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.point-chip{
 font-size:13px;padding:7px 14px;border-radius:999px;color:rgba(255,255,255,.86);
 background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);
 transition:background .2s,transform .2s;
}
.point-chip:hover{background:rgba(255,255,255,.16);transform:translateY(-1px)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:12px 26px;border-radius:999px;font-weight:800;font-size:15px;
 border:1px solid transparent;transition:transform .22s,box-shadow .22s,background .22s,color .22s;
}
.btn-gold{background:linear-gradient(135deg,#ffc233,var(--gold-3));color:#1a1f3d;box-shadow:0 12px 26px rgba(255,157,46,.32)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(255,157,46,.44);color:#1a1f3d}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.24);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.17);transform:translateY(-2px);color:#fff}
.btn-dark{background:var(--ink);color:#fff;box-shadow:var(--shadow-sm)}
.btn-dark:hover{background:var(--ink-700);transform:translateY(-2px);color:#fff}
/* ---------- 资料卡 ---------- */
.brief-card{
 background:var(--surface);border-radius:var(--radius-lg);overflow:hidden;
 box-shadow:var(--shadow-lg);color:var(--text);
}
.brief-cover{position:relative;height:158px;overflow:hidden}
.brief-cover img{width:100%;height:100%;object-fit:cover}
.brief-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,19,48,.05),rgba(15,19,48,.68))}
.brief-cover span{
 position:absolute;left:16px;bottom:12px;z-index:2;font-size:12.4px;font-weight:800;letter-spacing:.08em;
 color:#1a1f3d;background:linear-gradient(135deg,var(--gold-2),var(--gold-3));
 padding:5px 12px;border-radius:999px;
}
.brief-body{padding:20px 22px 24px}
.brief-title{font-size:17.5px;font-weight:800;color:var(--ink)}
.brief-sub{margin-top:6px;font-size:13.4px;color:var(--muted-2)}
.brief-list{margin-top:14px;display:grid;gap:9px}
.brief-list li{position:relative;padding-left:22px;font-size:13.8px;color:var(--muted);line-height:1.7}
.brief-list li::before{
 content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:2px;
 background:linear-gradient(135deg,var(--gold),var(--gold-3));
}
.lead-form{margin-top:18px;display:flex;gap:8px;flex-wrap:wrap}
.lead-form input{
 flex:1 1 150px;min-width:0;border:1px solid var(--line);border-radius:999px;
 padding:10px 16px;font-size:14px;outline:none;background:var(--surface-2);
 transition:border-color .2s,box-shadow .2s,background .2s;
}
.lead-form input:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(255,180,0,.18);background:#fff}
.lead-form button{
 border:0;border-radius:999px;padding:10px 20px;font-size:14px;font-weight:800;
 color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-3));
 transition:filter .2s,transform .2s;
}
.lead-form button:hover{filter:brightness(1.06);transform:translateY(-1px)}
.form-note{margin-top:10px;font-size:12.6px;color:var(--muted-2);min-height:18px}
/* ---------- 板块 ---------- */
.section{padding:70px 0;background:var(--surface)}
.section-alt{background:var(--bg)}
.sec-head{max-width:780px;margin-bottom:34px}
.kicker{
 display:inline-flex;align-items:center;gap:8px;font-size:12.4px;font-weight:800;letter-spacing:.12em;
 color:#8a5f00;background:rgba(255,180,0,.16);border:1px solid rgba(255,180,0,.32);
 padding:5px 13px;border-radius:999px;margin-bottom:14px;
}
.sec-title{font-size:clamp(21px,2.5vw,29px);line-height:1.4;letter-spacing:.3px;color:var(--ink)}
.sec-desc{margin-top:12px;color:var(--muted);font-size:15px;line-height:1.9}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.feature-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:26px 22px;box-shadow:var(--shadow-xs);height:100%;
 transition:transform .22s,box-shadow .22s,border-color .22s;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(255,180,0,.5)}
.f-icon{
 width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
 font-weight:900;color:#1a1f3d;font-size:15px;margin-bottom:15px;
 background:linear-gradient(135deg,var(--gold-2),var(--gold-3));
 box-shadow:0 8px 18px rgba(255,180,0,.24);
}
.f-title{font-size:17px;font-weight:800;color:var(--ink);margin-bottom:8px}
.f-text{font-size:14.4px;color:var(--muted);line-height:1.85}
/* ---------- 场景 ---------- */
.scene-layout{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:38px;align-items:start}
.scene-item{display:grid;grid-template-columns:auto 1fr;gap:16px;padding:20px 0;border-bottom:1px dashed var(--line)}
.scene-item:first-child{padding-top:0}
.scene-item:last-child{border-bottom:0;padding-bottom:0}
.scene-num{
 width:38px;height:38px;border-radius:50%;flex:none;background:var(--ink);color:var(--gold-2);
 font-weight:800;display:grid;place-items:center;font-size:14px;
}
.scene-title{font-size:16.5px;font-weight:800;color:var(--ink)}
.scene-text{margin-top:6px;font-size:14.4px;color:var(--muted);line-height:1.88}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.tag{
 display:inline-block;font-size:12.4px;padding:3px 11px;border-radius:999px;
 background:rgba(26,31,61,.07);color:var(--ink-500);font-weight:700;
}
.tag-gold{background:rgba(255,180,0,.18);color:#8a5f00}
.scene-figure{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 overflow:hidden;box-shadow:var(--shadow-sm);
}
.scene-figure img{width:100%;height:226px;object-fit:cover}
.scene-figure figcaption{padding:16px 20px 20px}
.scene-figure strong{display:block;font-size:15px;color:var(--ink)}
.scene-figure p{margin-top:6px;font-size:13.6px;color:var(--muted);line-height:1.8}
/* ---------- 对比 ---------- */
.compare{margin-top:6px;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface);box-shadow:var(--shadow-sm)}
.compare-row{display:grid;grid-template-columns:.9fr 1fr 1fr}
.compare-row>div{padding:16px 20px;border-bottom:1px solid var(--line);font-size:14.4px;color:var(--muted);line-height:1.75}
.compare-row>div:first-child{font-weight:800;color:var(--ink);background:var(--surface-2)}
.compare-row>div:nth-child(3){background:rgba(255,180,0,.07);color:#5a4a12}
.compare-head>div{background:var(--ink);color:#fff;font-weight:800;font-size:13.6px;letter-spacing:.04em}
.compare-head>div:first-child{background:var(--ink);color:#fff}
.compare-head>div:nth-child(3){background:var(--ink-700);color:var(--gold-2)}
.compare-row:last-child>div{border-bottom:0}
/* ---------- 数据与记录 ---------- */
.stats-band{
 background:linear-gradient(135deg,var(--ink),var(--ink-700));border-radius:var(--radius-lg);
 padding:30px 26px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;
 color:#fff;box-shadow:var(--shadow-md);
}
.stat-num{font-size:27px;font-weight:900;color:var(--gold-2);line-height:1.15}
.stat-label{margin-top:6px;font-size:13px;color:rgba(255,255,255,.72);line-height:1.6}
.record-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:28px}
.record-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
 box-shadow:var(--shadow-xs);display:flex;flex-direction:column;
 transition:transform .22s,box-shadow .22s;
}
.record-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.record-card img{width:100%;height:150px;object-fit:cover}
.record-body{padding:18px 20px 22px;flex:1}
.record-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:12.6px;color:var(--muted-2)}
.record-title{margin-top:10px;font-size:15.6px;font-weight:800;color:var(--ink);line-height:1.55}
.record-quote{margin-top:8px;font-size:14.2px;color:var(--muted);line-height:1.85}
/* ---------- 手册目录 ---------- */
.toc{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.toc-item{
 display:flex;gap:14px;align-items:flex-start;padding:17px 20px;background:var(--surface);
 border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-xs);
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.toc-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:rgba(255,180,0,.45)}
.toc-num{font-weight:900;color:var(--gold-3);font-size:15px;letter-spacing:.04em;line-height:1.6}
.toc-text strong{display:block;font-size:15px;color:var(--ink);font-weight:800}
.toc-text span{display:block;margin-top:4px;font-size:13.4px;color:var(--muted);line-height:1.7}
/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:920px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:0 20px;box-shadow:var(--shadow-xs);transition:border-color .2s,box-shadow .2s}
.faq-item:hover{border-color:rgba(255,180,0,.42);box-shadow:var(--shadow-sm)}
.faq-item summary{
 cursor:pointer;list-style:none;padding:18px 0;font-weight:800;font-size:15.4px;color:var(--ink);
 display:flex;justify-content:space-between;gap:16px;align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:var(--gold-3);font-weight:900;line-height:1;flex:none}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:14px 0 18px;border-top:1px dashed var(--line);color:var(--muted);font-size:14.5px;line-height:1.9}
/* ---------- 收口 CTA ---------- */
.cta-band{
 position:relative;overflow:hidden;isolation:isolate;
 background:linear-gradient(135deg,var(--ink),var(--ink-700));border-radius:var(--radius-lg);
 padding:44px 38px;color:#fff;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);
 gap:30px;align-items:center;box-shadow:var(--shadow-md);
}
.cta-band .cta-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.16;z-index:-1}
.cta-title{font-size:clamp(20px,2.4vw,26px);line-height:1.45;color:#fff}
.cta-text{margin-top:12px;font-size:14.8px;color:rgba(255,255,255,.76);line-height:1.9}
.cta-side{display:grid;gap:10px}
.cta-side .btn{width:100%}
.assure{
 margin-top:24px;display:flex;flex-wrap:wrap;gap:12px 26px;justify-content:space-between;
 padding-top:20px;border-top:1px solid var(--line);
}
.assure-item{display:flex;align-items:center;gap:9px;font-size:13.6px;color:var(--muted);font-weight:600}
.assure-item i{
 width:20px;height:20px;border-radius:50%;background:rgba(47,125,84,.14);color:var(--ok);
 display:grid;place-items:center;font-style:normal;font-size:12px;font-weight:900;flex:none;
}
/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:54px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:34px}
.footer-brand .brand{color:#fff;margin-bottom:14px}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.6);max-width:370px;line-height:1.85}
.footer-col h3{font-size:14.5px;color:#fff;margin-bottom:12px;letter-spacing:.05em;font-weight:800}
.footer-col a{
 display:block;font-size:13.8px;color:rgba(255,255,255,.62);padding:5px 0;
 transition:color .2s,transform .2s;
}
.footer-col a:hover{color:var(--gold-2);transform:translateX(3px)}
.footer-bottom{
 margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);
 display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
 font-size:12.8px;color:rgba(255,255,255,.5);
}
/* ---------- 底部固定转化条 ---------- */
.sticky-cta{
 position:fixed;left:0;right:0;bottom:0;z-index:90;
 background:rgba(15,19,48,.96);backdrop-filter:blur(12px);
 border-top:1px solid rgba(255,255,255,.12);padding:12px 0;
}
.sticky-inner{display:flex;align-items:center;gap:18px;justify-content:space-between}
.sticky-text{color:#fff;font-size:14.2px;font-weight:800;line-height:1.5}
.sticky-text small{display:block;font-weight:500;color:rgba(255,255,255,.6);font-size:12.6px;margin-top:3px}
.sticky-inner .btn{padding:10px 22px;font-size:14px;white-space:nowrap}
/* ---------- 响应式 ---------- */
@media (max-width:1024px){
 .hero-inner{grid-template-columns:1fr;gap:32px}
 .grid-3,.record-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .scene-layout{grid-template-columns:1fr;gap:26px}
 .stats-band{grid-template-columns:repeat(2,minmax(0,1fr))}
 .cta-band{grid-template-columns:1fr;padding:36px 28px}
 .footer-grid{grid-template-columns:1fr 1fr}
 .footer-brand{grid-column:1/-1}
}
@media (max-width:980px){
 .nav-toggle{display:inline-flex}
 .header-main{
  display:none;position:absolute;top:100%;left:0;right:0;
  background:rgba(15,19,48,.99);border-top:1px solid rgba(255,255,255,.1);
  padding:14px 20px 18px;flex-direction:column;align-items:stretch;gap:14px;
  box-shadow:0 20px 40px rgba(0,0,0,.35);
 }
 .header-main.open{display:flex}
 .main-nav{flex-direction:column;gap:2px}
 .main-nav a{padding:10px 12px;border-radius:10px}
 .header-tools{flex-wrap:wrap;margin-left:0}
 .search-box{width:100%}
 .search-box input{width:100%}
 .header-inner{min-height:62px}
}
@media (max-width:768px){
 body{font-size:15px;padding-bottom:108px}
 .section{padding:52px 0}
 .hero{padding:46px 0 54px}
 .grid-3,.record-grid,.toc{grid-template-columns:1fr}
 .stats-band{grid-template-columns:repeat(2,minmax(0,1fr));padding:24px 20px;gap:16px}
 .compare-row{grid-template-columns:1fr}
 .compare-row>div{padding:13px 18px;border-bottom:1px solid var(--line)}
 .compare-head{display:none}
 .compare-row>div:first-child{background:var(--surface-2);font-size:14.2px}
 .compare-row>div:nth-child(3){background:rgba(255,180,0,.09)}
 .cta-band{padding:30px 22px}
 .assure{flex-direction:column;gap:10px;align-items:flex-start}
 .sticky-inner{gap:12px}
 .sticky-text{font-size:13.2px}
 .sticky-text small{font-size:12px}
 .sticky-inner .btn{padding:9px 16px;font-size:13.2px}
 .footer-grid{gap:26px}
}
@media (max-width:520px){
 .wrap{padding:0 16px}
 .hero-title{font-size:24px}
 .hero-desc,.sec-desc{font-size:14.4px}
 .hero-actions{flex-direction:column;align-items:stretch}
 .hero-actions .btn{width:100%}
 .brief-body{padding:18px}
 .stats-band{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1fr}
 .footer-bottom{flex-direction:column;gap:6px}
 .sticky-text small{display:none}
 .btn{padding:11px 20px;font-size:14.2px}
}

/* roulang page: category2 */
:root{
  --ink-900:#0f1330;
  --ink:#1a1f3d;
  --ink-700:#262c55;
  --ink-500:#3a4173;
  --gold:#ffb400;
  --gold-2:#ffd166;
  --gold-3:#ff9d2e;
  --cyan:#22d3ee;
  --bg:#f4f6fb;
  --surface:#ffffff;
  --surface-2:#eef1f9;
  --text:#1e2333;
  --muted:#667089;
  --muted-2:#8d95ab;
  --line:#e2e6f1;
  --ok:#2f7d54;
  --warn:#b4553a;
  --radius-sm:8px;
  --radius:12px;
  --radius-lg:20px;
  --shadow-xs:0 1px 3px rgba(20,25,55,.06);
  --shadow-sm:0 6px 18px rgba(20,25,55,.07);
  --shadow-md:0 14px 36px rgba(20,25,55,.10);
  --shadow-lg:0 28px 60px rgba(20,25,55,.16);
  --maxw:1200px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.78;
  font-size:15.5px;
  padding-bottom:92px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s,background .2s,border-color .2s}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;color:var(--ink);line-height:1.32}
p{margin:0}
button{font-family:inherit;cursor:pointer}
input,select{font-family:inherit}
:focus-visible{outline:3px solid rgba(34,211,238,.6);outline-offset:2px}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(15,19,48,.95);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;white-space:nowrap;letter-spacing:.5px}
.brand:hover{color:#fff}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:none;
  background:linear-gradient(140deg,var(--gold),var(--gold-3));
  display:grid;place-items:center;color:#1a1f3d;font-size:15px;font-weight:900;
  box-shadow:0 6px 16px rgba(255,180,0,.34);
}
.header-main{display:flex;align-items:center;gap:18px;flex:1;min-width:0}
.main-nav{display:flex;gap:4px;flex-wrap:wrap}
.main-nav a{
  padding:8px 14px;border-radius:999px;color:rgba(255,255,255,.76);
  font-size:14.5px;font-weight:600;transition:background .2s,color .2s,transform .2s;white-space:nowrap;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.09)}
.main-nav a.active{
  color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-2));
  box-shadow:0 6px 16px rgba(255,180,0,.28);
}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  border-radius:999px;padding:4px 4px 4px 14px;transition:border-color .2s,background .2s;
}
.search-box:focus-within{border-color:rgba(34,211,238,.7);background:rgba(255,255,255,.13)}
.search-box input{background:none;border:0;color:#fff;font-size:13.5px;width:148px;outline:none}
.search-box input::placeholder{color:rgba(255,255,255,.45)}
.search-box button{
  border:0;background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1f3d;
  font-weight:800;font-size:13px;padding:6px 13px;border-radius:999px;transition:filter .2s;
}
.search-box button:hover{filter:brightness(1.06)}
.lang-pill{
  border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.75);
  font-size:12.5px;padding:5px 11px;border-radius:999px;white-space:nowrap;font-weight:600;
}
.nav-toggle{
  display:none;margin-left:auto;width:40px;height:40px;border-radius:11px;
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);
  color:#fff;font-size:18px;line-height:1;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:rgba(255,255,255,.16)}

/* ---------- 分类首屏 ---------- */
.cat-hero{position:relative;overflow:hidden;background:#12162e;color:#fff;padding:64px 0 58px;isolation:isolate}
.cat-hero .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.24;z-index:-2}
.cat-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(620px 400px at 8% 14%, rgba(34,211,238,.28), transparent 70%),
    radial-gradient(560px 440px at 88% 4%, rgba(255,180,0,.24), transparent 70%),
    radial-gradient(760px 520px at 50% 128%, rgba(118,92,255,.34), transparent 72%),
    linear-gradient(180deg, rgba(15,19,48,.66), rgba(15,19,48,.96));
}
.cat-hero-grid{
  display:grid;grid-template-columns:minmax(0,1.14fr) minmax(0,.86fr);
  gap:44px;align-items:center;
}
.cat-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
  letter-spacing:.14em;color:var(--gold-2);background:rgba(255,180,0,.14);
  border:1px solid rgba(255,180,0,.3);padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.cat-hero h1{font-size:clamp(26px,3.2vw,40px);color:#fff;letter-spacing:.5px;line-height:1.26}
.cat-hero h1 em{font-style:normal;color:var(--gold-2)}
.hero-lead{margin-top:16px;font-size:15.6px;line-height:1.98;color:rgba(255,255,255,.76);max-width:640px}
.hero-perks{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.perk{
  font-size:12.8px;padding:6px 14px;border-radius:999px;color:rgba(255,255,255,.88);
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);
  transition:background .2s,transform .2s;
}
.perk:hover{background:rgba(255,255,255,.16);transform:translateY(-1px)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.qualify{margin-top:15px;font-size:12.8px;color:rgba(255,255,255,.56);letter-spacing:.2px}
.hero-card{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15);
  border-radius:var(--radius-lg);padding:26px 24px;backdrop-filter:blur(9px);
  box-shadow:var(--shadow-lg);
}
.hero-card h2{color:#fff;font-size:16px;letter-spacing:.6px;margin-bottom:6px}
.hero-card .mini-note{font-size:12.6px;color:rgba(255,255,255,.55);margin-bottom:14px}
.stat-row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.15)}
.stat-row:last-of-type{border-bottom:0;padding-bottom:4px}
.stat-num{font-size:22px;font-weight:900;color:var(--gold-2);letter-spacing:.5px}
.stat-label{font-size:13.4px;color:rgba(255,255,255,.74)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:999px;font-weight:800;font-size:15px;
  border:1px solid transparent;transition:transform .22s,box-shadow .22s,background .22s,color .22s;
}
.btn-gold{background:linear-gradient(135deg,#ffc233,var(--gold-3));color:#1a1f3d;box-shadow:0 12px 26px rgba(255,157,46,.32)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(255,157,46,.42);color:#1a1f3d}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.24);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.17);transform:translateY(-2px);color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-700);transform:translateY(-2px);color:#fff}
.btn-line{background:transparent;border-color:var(--line);color:var(--ink);box-shadow:var(--shadow-xs)}
.btn-line:hover{border-color:var(--gold);color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow-sm)}

/* ---------- 速览条 ---------- */
.quick-nav{background:var(--ink);border-top:1px solid rgba(255,255,255,.07)}
.quick-nav .wrap{display:flex;gap:10px;flex-wrap:wrap;align-items:center;padding-top:14px;padding-bottom:14px}
.quick-nav span.qlabel{font-size:12.5px;color:rgba(255,255,255,.45);letter-spacing:.16em;margin-right:4px}
.quick-nav a{
  font-size:13.4px;color:rgba(255,255,255,.74);border:1px solid rgba(255,255,255,.14);
  border-radius:999px;padding:6px 14px;font-weight:600;
}
.quick-nav a:hover{color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-2));border-color:transparent}

/* ---------- 板块 ---------- */
.section{padding:66px 0;position:relative}
.section--surface{background:var(--surface)}
.section--soft{background:var(--surface-2)}
.section-head{max-width:780px;margin-bottom:34px}
.sec-eyebrow{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:.16em;
  color:#9a6400;background:rgba(255,180,0,.16);border:1px solid rgba(255,180,0,.32);
  padding:5px 13px;border-radius:999px;margin-bottom:14px;
}
.sec-title{font-size:clamp(22px,2.4vw,30px);letter-spacing:.4px}
.sec-desc{margin-top:12px;color:var(--muted);font-size:15.2px;line-height:1.95}
.tag{
  display:inline-block;font-size:12px;font-weight:700;color:var(--ink-500);
  background:var(--surface-2);border-radius:999px;padding:3px 11px;letter-spacing:.2px;
}
.tag-gold{color:#7a5200;background:rgba(255,180,0,.18)}

/* ---------- 卖点三连 ---------- */
.skill-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.tip-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-xs);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.tip-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(255,180,0,.45)}
.tip-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  font-weight:900;font-size:16px;color:#1a1f3d;
  background:linear-gradient(140deg,var(--gold-2),var(--gold-3));
  box-shadow:0 8px 18px rgba(255,157,46,.28);margin-bottom:16px;
}
.tip-card h3{font-size:17.5px;margin-bottom:10px}
.tip-card p{color:var(--muted);font-size:14.6px;line-height:1.92}
.tip-card .tag{margin-top:16px}

/* ---------- 图文交替 ---------- */
.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:42px;align-items:center}
.split + .split{margin-top:48px}
.split-media{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md)}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .55s ease}
.split-media:hover img{transform:scale(1.045)}
.split--rev .split-media{order:2}
.split-body h3{font-size:20px;margin-bottom:12px}
.split-body > p{color:var(--muted);font-size:15px;line-height:1.95}
.check-list{margin-top:18px;display:grid;gap:10px}
.check-list li{position:relative;padding-left:26px;color:var(--muted);font-size:14.8px;line-height:1.88}
.check-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--gold-3);font-weight:900}

/* ---------- 流程 ---------- */
.flow-list{display:grid;gap:18px}
.flow-item{
  display:grid;grid-template-columns:56px minmax(0,1fr);gap:18px;align-items:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-xs);
  transition:transform .22s,box-shadow .22s,border-color .22s;
}
.flow-item:hover{transform:translateX(4px);box-shadow:var(--shadow-sm);border-color:rgba(255,180,0,.4)}
.flow-no{
  width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  font-weight:900;font-size:16px;color:#fff;background:linear-gradient(140deg,#2b3263,#1a1f3d);
  border:2px solid rgba(255,180,0,.55);
}
.flow-item h3{font-size:16.8px;margin-bottom:8px}
.flow-item p{color:var(--muted);font-size:14.7px;line-height:1.9}

/* ---------- 对比 ---------- */
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.compare-col{border-radius:var(--radius-lg);padding:28px 26px;border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-xs)}
.compare-col h3{font-size:17.5px;margin-bottom:14px}
.compare-col ul{display:grid;gap:11px}
.compare-col li{position:relative;padding-left:24px;font-size:14.7px;line-height:1.88;color:var(--muted)}
.compare-col li::before{content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:50%;background:var(--muted-2)}
.compare-col--dark{
  background:linear-gradient(160deg,#1f2550,#12162e);border-color:rgba(255,255,255,.1);
  box-shadow:var(--shadow-md);
}
.compare-col--dark h3{color:#fff}
.compare-col--dark li{color:rgba(255,255,255,.78)}
.compare-col--dark li::before{background:linear-gradient(135deg,var(--gold),var(--gold-3))}

/* ---------- 数据条与实测 ---------- */
.stat-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:30px}
.stat-cell{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 16px;text-align:center;box-shadow:var(--shadow-xs);
  transition:transform .22s,box-shadow .22s;
}
.stat-cell:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.stat-cell b{display:block;font-size:26px;font-weight:900;color:var(--ink);line-height:1.3}
.stat-cell small{display:block;margin-top:4px;font-size:13px;color:var(--muted-2);letter-spacing:.3px}
.quote-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.quote-card{
  background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--gold);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-xs);
  transition:box-shadow .22s,transform .22s;
}
.quote-card:hover{box-shadow:var(--shadow-sm);transform:translateY(-3px)}
.quote-card p{color:var(--text);font-size:14.9px;line-height:1.95}
.quote-by{margin-top:14px;font-size:12.9px;color:var(--muted-2);display:flex;align-items:center;gap:8px}
.quote-by i{width:22px;height:22px;border-radius:50%;display:inline-grid;place-items:center;font-style:normal;font-size:11px;font-weight:900;color:#1a1f3d;background:linear-gradient(140deg,var(--gold-2),var(--gold-3))}

/* ---------- 误区 ---------- */
.myth-list{display:grid;gap:14px}
.myth-list li{
  display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px;align-items:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px 22px;font-size:14.8px;color:var(--muted);line-height:1.92;
}
.myth-mark{color:var(--warn);font-weight:900;font-size:15px}
.myth-list b{color:var(--ink)}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-xs);
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(255,180,0,.42)}
.news-link{display:block;padding:22px 22px 20px;height:100%}
.news-card h3{font-size:16.4px;margin:11px 0 9px;line-height:1.58}
.news-card p{
  color:var(--muted);font-size:14px;line-height:1.86;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{margin-top:14px;display:block;font-size:12.6px;color:var(--muted-2);letter-spacing:.2px}
.empty-note{
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius);
  padding:26px;text-align:center;color:var(--muted);font-size:14.6px;
}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:920px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:0 22px;box-shadow:var(--shadow-xs);transition:border-color .22s,box-shadow .22s;
}
.faq-item[open]{border-color:rgba(255,180,0,.5);box-shadow:var(--shadow-sm)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 0;font-weight:800;color:var(--ink);
  font-size:15.6px;display:flex;justify-content:space-between;gap:16px;align-items:center;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--gold-3);font-size:20px;font-weight:900;line-height:1;flex:none}
.faq-item[open] summary::after{content:"–"}
.faq-body{padding:0 0 20px;color:var(--muted);font-size:14.8px;line-height:1.96}

/* ---------- 转化条 ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,#1f2550,#12162e 72%);
  color:#fff;padding:44px 42px;box-shadow:var(--shadow-lg);
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:center;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(420px 240px at 88% 12%, rgba(255,180,0,.22), transparent 70%);
}
.cta-band h2{color:#fff;font-size:clamp(20px,2.2vw,26px);letter-spacing:.4px;position:relative;z-index:1}
.cta-band p{margin-top:10px;color:rgba(255,255,255,.74);font-size:14.8px;line-height:1.9;max-width:640px;position:relative;z-index:1}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}

/* ---------- 底部固定条 ---------- */
.sticky-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:rgba(15,19,48,.96);backdrop-filter:blur(12px);
  border-top:1px solid rgba(255,180,0,.28);
}
.sticky-bar .wrap{display:flex;align-items:center;gap:16px;justify-content:space-between;padding-top:11px;padding-bottom:11px;flex-wrap:wrap}
.sticky-bar p{margin:0;color:rgba(255,255,255,.78);font-size:13.6px}
.sticky-bar p b{color:var(--gold-2)}
.sticky-bar .btn{padding:9px 22px;font-size:14px}

/* ---------- footer ---------- */
.site-footer{background:#0f1330;color:rgba(255,255,255,.7);padding:52px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(2,minmax(0,.8fr));gap:36px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);max-width:420px}
.footer-col h3{color:#fff;font-size:14.5px;letter-spacing:.6px;margin-bottom:14px}
.footer-col a{display:block;font-size:13.8px;color:rgba(255,255,255,.62);padding:5px 0}
.footer-col a:hover{color:var(--gold-2)}
.footer-bottom{
  margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.8px;color:rgba(255,255,255,.45);
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .cat-hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-lead{max-width:100%}
  .skill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .compare{grid-template-columns:1fr}
  .quote-grid{grid-template-columns:1fr}
  .cta-band{grid-template-columns:1fr;padding:36px 30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:768px){
  .nav-toggle{display:inline-flex}
  .header-main{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:rgba(15,19,48,.99);border-bottom:1px solid rgba(255,255,255,.1);
    padding:16px 20px 20px;flex-direction:column;align-items:stretch;gap:14px;
    box-shadow:var(--shadow-lg);
  }
  .header-main.open{display:flex}
  .main-nav{flex-direction:column;gap:6px}
  .main-nav a{padding:10px 14px;border-radius:12px}
  .header-tools{margin-left:0;flex-wrap:wrap;gap:10px}
  .search-box{flex:1 1 180px}
  .search-box input{width:100%;min-width:0}
  .section{padding:52px 0}
  .split{grid-template-columns:1fr;gap:24px}
  .split--rev .split-media{order:0}
  .split + .split{margin-top:38px}
  .skill-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .sticky-bar p{display:none}
  .sticky-bar .wrap{justify-content:center}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (max-width:520px){
  body{font-size:15px;padding-bottom:76px}
  .wrap{padding:0 16px}
  .cat-hero{padding:46px 0 42px}
  .hero-actions .btn{width:100%}
  .hero-card{padding:22px 18px}
  .flow-item{grid-template-columns:1fr;gap:12px;padding:20px 18px}
  .stat-strip{grid-template-columns:1fr 1fr;gap:12px}
  .cta-band{padding:28px 20px}
  .section-head{margin-bottom:26px}
  .quick-nav .wrap{gap:8px}
  .quick-nav a{font-size:12.6px;padding:5px 11px}
}

/* roulang page: category3 */
:root{
 --ink-900:#0f1330;
 --ink:#1a1f3d;
 --ink-700:#262c55;
 --ink-500:#3a4173;
 --gold:#ffb400;
 --gold-2:#ffd166;
 --gold-3:#ff9d2e;
 --cyan:#22d3ee;
 --bg:#f4f6fb;
 --surface:#ffffff;
 --surface-2:#eef1f9;
 --text:#1e2333;
 --muted:#667089;
 --muted-2:#8d95ab;
 --line:#e2e6f1;
 --ok:#2f7d54;
 --warn:#b4553a;
 --radius-sm:8px;
 --radius:12px;
 --radius-lg:20px;
 --shadow-xs:0 1px 3px rgba(20,25,55,.06);
 --shadow-sm:0 6px 18px rgba(20,25,55,.07);
 --shadow-md:0 14px 36px rgba(20,25,55,.10);
 --shadow-lg:0 28px 60px rgba(20,25,55,.16);
 --maxw:1200px;
 --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:var(--font);
 background:var(--bg);
 color:var(--text);
 line-height:1.78;
 font-size:15px;
 padding-bottom:96px;
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,select{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
::selection{background:rgba(255,180,0,.35);color:#1a1f3d}
:focus-visible{outline:3px solid rgba(34,211,238,.65);outline-offset:2px}

/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:80;
 background:rgba(15,19,48,.95);
 backdrop-filter:blur(14px);
 border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;position:relative}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;white-space:nowrap;letter-spacing:.5px}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:none;
 background:linear-gradient(140deg,var(--gold),var(--gold-3));
 display:grid;place-items:center;color:#1a1f3d;font-size:15px;font-weight:900;
 box-shadow:0 6px 16px rgba(255,180,0,.34);
}
.header-main{display:flex;align-items:center;gap:18px;flex:1;min-width:0}
.main-nav{display:flex;gap:4px;flex-wrap:wrap}
.main-nav a{
 padding:8px 14px;border-radius:999px;color:rgba(255,255,255,.76);
 font-size:14.5px;font-weight:600;transition:background .2s,color .2s,transform .2s;white-space:nowrap;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.09)}
.main-nav a.active{
 color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-2));
 box-shadow:0 6px 16px rgba(255,180,0,.28);
}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto}
.search-box{
 display:flex;align-items:center;gap:6px;
 background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
 border-radius:999px;padding:4px 4px 4px 14px;transition:border-color .2s,background .2s;
}
.search-box:focus-within{border-color:rgba(34,211,238,.7);background:rgba(255,255,255,.13)}
.search-box input{background:none;border:0;color:#fff;font-size:13.5px;width:148px;outline:none}
.search-box input::placeholder{color:rgba(255,255,255,.45)}
.search-box button{
 border:0;background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1f3d;
 font-weight:800;font-size:13px;padding:6px 13px;border-radius:999px;transition:filter .2s;
}
.search-box button:hover{filter:brightness(1.06)}
.lang-pill{
 border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.75);
 font-size:12.5px;padding:5px 11px;border-radius:999px;white-space:nowrap;font-weight:600;
}
.nav-toggle{
 display:none;margin-left:auto;width:40px;height:40px;border-radius:11px;
 border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.08);
 color:#fff;font-size:18px;line-height:1;align-items:center;justify-content:center;
}
.nav-toggle:hover{background:rgba(255,255,255,.16)}

/* ---------- buttons / tags ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:13px 26px;border-radius:999px;font-weight:800;font-size:15px;
 border:1px solid transparent;transition:transform .22s,box-shadow .22s,background .22s,color .22s;
 line-height:1.4;
}
.btn-gold{background:linear-gradient(135deg,#ffc233,var(--gold-3));color:#1a1f3d;box-shadow:0 12px 26px rgba(255,157,46,.34)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(255,157,46,.44);color:#1a1f3d}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.24);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.17);transform:translateY(-2px);color:#fff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-700);transform:translateY(-2px);color:#fff}
.btn-outline{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--gold);background:rgba(255,180,0,.08);transform:translateY(-2px)}
.tag{
 display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:.1em;
 color:#8a6100;background:rgba(255,180,0,.16);border:1px solid rgba(255,180,0,.34);
 padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.tag-cyan{color:#0b6477;background:rgba(34,211,238,.14);border-color:rgba(34,211,238,.35)}

/* ---------- hero ---------- */
.page-hero{position:relative;overflow:hidden;background:#12162e;color:#fff;padding:66px 0 62px;isolation:isolate}
.page-hero .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.24;z-index:-2}
.page-hero::after{
 content:"";position:absolute;inset:0;z-index:-1;
 background:
 radial-gradient(620px 400px at 12% 14%, rgba(34,211,238,.28), transparent 70%),
 radial-gradient(560px 440px at 86% 8%, rgba(255,180,0,.24), transparent 70%),
 radial-gradient(720px 520px at 50% 128%, rgba(118,92,255,.32), transparent 72%),
 linear-gradient(180deg, rgba(15,19,48,.60), rgba(15,19,48,.95));
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:46px;align-items:center}
.hero-eyebrow{
 display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
 letter-spacing:.14em;color:var(--gold-2);background:rgba(255,180,0,.14);
 border:1px solid rgba(255,180,0,.28);padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.page-hero h1{font-size:clamp(26px,3.3vw,40px);line-height:1.28;letter-spacing:.5px;color:#fff;font-weight:800}
.page-hero h1 em{font-style:normal;color:var(--gold-2)}
.hero-sub{margin-top:16px;font-size:17px;font-weight:700;color:rgba(255,255,255,.9)}
.hero-desc{margin-top:14px;font-size:15.2px;line-height:1.92;color:rgba(255,255,255,.74);max-width:640px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.point-chip{
 font-size:13px;padding:7px 14px;border-radius:999px;color:rgba(255,255,255,.86);
 background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);
 transition:background .2s,transform .2s;
}
.point-chip:hover{background:rgba(255,255,255,.16);transform:translateY(-1px)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-panel{
 position:relative;border-radius:var(--radius-lg);padding:24px;
 background:rgba(255,255,255,.07);
 border:1px solid rgba(255,255,255,.16);
 box-shadow:var(--shadow-lg);
 backdrop-filter:blur(8px);
}
.hero-panel h2{font-size:15px;color:#fff;font-weight:800;letter-spacing:.5px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.hero-panel h2 span{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(34,211,238,.18)}
.panel-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.16)}
.panel-row:last-of-type{border-bottom:0}
.panel-row .k{font-size:13.5px;color:rgba(255,255,255,.66)}
.panel-row .v{font-size:14px;font-weight:800;color:#fff}
.panel-row .v.gold{color:var(--gold-2)}
.panel-total{
 margin-top:16px;padding:14px 16px;border-radius:var(--radius);
 background:linear-gradient(135deg,rgba(255,180,0,.22),rgba(255,157,46,.12));
 border:1px solid rgba(255,180,0,.36);
 display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.panel-total .label{font-size:13px;color:rgba(255,255,255,.78)}
.panel-total .num{font-size:24px;font-weight:900;color:var(--gold-2);letter-spacing:.5px}

/* ---------- section ---------- */
.section{padding:74px 0}
.section--white{background:var(--surface)}
.section--soft{background:var(--surface-2)}
.section--dark{background:linear-gradient(160deg,#151a38,#1f2549);color:#fff}
.sec-head{max-width:780px;margin-bottom:36px}
.sec-title{font-size:clamp(22px,2.5vw,30px);line-height:1.4;color:var(--ink);font-weight:800;letter-spacing:.3px}
.sec-desc{margin-top:12px;color:var(--muted);font-size:15px;line-height:1.9}
.section--dark .sec-title{color:#fff}
.section--dark .sec-desc{color:rgba(255,255,255,.72)}

/* ---------- metric cards ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.metric{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:24px 22px;box-shadow:var(--shadow-xs);
 transition:transform .24s,box-shadow .24s,border-color .24s;
}
.metric:hover{transform:translateY(-5px);box-shadow:var(--shadow-sm);border-color:rgba(255,180,0,.55)}
.metric-num{font-size:29px;font-weight:900;color:var(--ink);letter-spacing:.5px;line-height:1.2}
.metric-num small{font-size:15px;font-weight:800;color:var(--gold-3);margin-left:2px}
.metric-name{margin-top:10px;font-size:14.5px;font-weight:800;color:var(--ink-700)}
.metric-note{margin-top:6px;font-size:13.4px;color:var(--muted);line-height:1.7}

/* ---------- flow ---------- */
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;counter-reset:flowstep;margin-top:8px}
.flow-item{
 position:relative;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius);padding:32px 22px 22px;box-shadow:var(--shadow-xs);
 transition:transform .24s,box-shadow .24s;
}
.flow-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.flow-item::before{
 content:counter(flowstep);counter-increment:flowstep;
 position:absolute;top:-16px;left:22px;width:34px;height:34px;border-radius:10px;
 background:linear-gradient(135deg,var(--gold),var(--gold-3));color:#1a1f3d;
 font-weight:900;font-size:15px;display:grid;place-items:center;
 box-shadow:0 8px 18px rgba(255,157,46,.32);
}
.flow-item h3{font-size:16px;font-weight:800;color:var(--ink);margin-bottom:8px}
.flow-item p{font-size:13.8px;color:var(--muted);line-height:1.8}

/* ---------- tier list ---------- */
.tier-layout{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:42px;align-items:start}
.tier-figure{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--line);background:var(--surface)}
.tier-figure img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}
.tier-figure figcaption{padding:14px 18px;font-size:13.2px;color:var(--muted);background:var(--surface);border-top:1px solid var(--line);line-height:1.7}
.tier{
 display:grid;grid-template-columns:50px minmax(0,1fr) auto;gap:16px;align-items:center;
 padding:15px 18px;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius);margin-bottom:12px;
 transition:transform .22s,box-shadow .22s,border-color .22s;
}
.tier:hover{transform:translateX(4px);box-shadow:var(--shadow-xs);border-color:rgba(255,180,0,.55)}
.tier-badge{
 width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
 font-weight:900;font-size:14px;color:#1a1f3d;
 background:linear-gradient(140deg,var(--gold-2),var(--gold-3));
 box-shadow:0 6px 14px rgba(255,157,46,.28);
}
.tier-name{font-size:15px;font-weight:800;color:var(--ink)}
.tier-desc{font-size:13.2px;color:var(--muted);margin-top:2px;line-height:1.65}
.tier-x{
 font-size:15px;font-weight:900;color:#8a6100;background:rgba(255,180,0,.14);
 border:1px solid rgba(255,180,0,.32);border-radius:999px;padding:5px 14px;white-space:nowrap;
}

/* ---------- scene cards ---------- */
.scene{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 overflow:hidden;box-shadow:var(--shadow-xs);height:100%;display:flex;flex-direction:column;
 transition:transform .26s,box-shadow .26s;
}
.scene:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.scene-media{position:relative;overflow:hidden}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s}
.scene:hover .scene-media img{transform:scale(1.05)}
.scene-media .scene-tag{
 position:absolute;left:14px;top:14px;font-size:12px;font-weight:800;
 color:#1a1f3d;background:linear-gradient(135deg,var(--gold),var(--gold-2));
 padding:4px 12px;border-radius:999px;letter-spacing:.5px;
}
.scene-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-body h3{font-size:16.5px;font-weight:800;color:var(--ink);line-height:1.5}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.85;margin:0}
.scene-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px}
.scene-points span{
 font-size:12.4px;color:var(--ink-700);background:var(--surface-2);
 border:1px solid var(--line);border-radius:999px;padding:4px 11px;
}

/* ---------- channel matrix ---------- */
.channel{
 display:block;position:relative;background:rgba(255,255,255,.06);
 border:1px solid rgba(255,255,255,.16);border-radius:var(--radius-lg);
 padding:26px 24px;transition:transform .24s,background .24s,border-color .24s;
}
.channel:hover{transform:translateY(-5px);background:rgba(255,255,255,.11);border-color:rgba(255,180,0,.55)}
.channel .ch-index{font-size:12.5px;font-weight:800;letter-spacing:.16em;color:var(--cyan);display:block;margin-bottom:12px}
.channel h3{font-size:18px;font-weight:800;color:#fff;margin-bottom:10px}
.channel p{font-size:14px;color:rgba(255,255,255,.68);line-height:1.85;margin:0 0 16px}
.channel .ch-link{font-size:13.6px;font-weight:800;color:var(--gold-2);display:inline-flex;align-items:center;gap:6px}
.channel .ch-link::after{content:"→";transition:transform .22s}
.channel:hover .ch-link::after{transform:translateX(4px)}
.channel.current{border-color:rgba(255,180,0,.55);background:rgba(255,180,0,.10)}

/* ---------- compare ---------- */
.compare{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 overflow:hidden;box-shadow:var(--shadow-xs);
}
.compare-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1fr);background:var(--ink);color:#fff}
.compare-head span{padding:15px 20px;font-size:13.6px;font-weight:800;letter-spacing:.5px}
.compare-head span + span{border-left:1px solid rgba(255,255,255,.12)}
.compare-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1fr);border-top:1px solid var(--line)}
.compare-row > div{padding:16px 20px;font-size:14px;line-height:1.8}
.compare-row > div + div{border-left:1px solid var(--line)}
.compare-row .c-question{font-weight:800;color:var(--ink)}
.compare-row .c-mis{color:var(--muted-2);text-decoration:line-through;text-decoration-color:rgba(180,85,58,.5)}
.compare-row .c-real{color:var(--ink-700);background:rgba(47,125,84,.06);font-weight:600}

/* ---------- faq ---------- */
.faq-list{max-width:900px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 margin-bottom:12px;overflow:hidden;transition:box-shadow .22s,border-color .22s;
}
.faq-item[open]{box-shadow:var(--shadow-sm);border-color:rgba(255,180,0,.5)}
.faq-item summary{
 list-style:none;cursor:pointer;padding:18px 58px 18px 22px;position:relative;
 font-size:15.4px;font-weight:800;color:var(--ink);transition:background .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:rgba(255,180,0,.06)}
.faq-item summary::after{
 content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
 width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
 background:var(--surface-2);color:var(--ink-700);font-size:17px;font-weight:700;line-height:1;
}
.faq-item[open] summary::after{content:"−";background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1f3d}
.faq-body{padding:0 22px 20px;color:var(--muted);font-size:14.4px;line-height:1.9}

/* ---------- cta band ---------- */
.cta-band{
 position:relative;overflow:hidden;border-radius:var(--radius-lg);
 padding:44px 42px;color:#fff;isolation:isolate;
 background:linear-gradient(135deg,#1a1f3d,#2a3163);
 border:1px solid rgba(255,255,255,.1);
 box-shadow:var(--shadow-md);
 display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);
 gap:32px;align-items:center;
}
.cta-band::before{
 content:"";position:absolute;inset:0;z-index:-1;
 background:
 radial-gradient(420px 260px at 88% 16%, rgba(255,180,0,.28), transparent 70%),
 radial-gradient(420px 300px at 6% 96%, rgba(34,211,238,.24), transparent 72%);
}
.cta-band h2{font-size:clamp(21px,2.3vw,27px);font-weight:800;line-height:1.45;color:#fff}
.cta-band p{margin-top:12px;font-size:14.6px;color:rgba(255,255,255,.74);line-height:1.9}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:stretch}
.cta-actions .btn{width:100%}

/* ---------- sticky bar ---------- */
.sticky-bar{
 position:fixed;left:0;right:0;bottom:0;z-index:90;
 background:rgba(15,19,48,.96);backdrop-filter:blur(14px);
 border-top:1px solid rgba(255,255,255,.12);
 padding:12px 0;
}
.sticky-inner{display:flex;align-items:center;justify-content:space-between;gap:18px}
.sticky-text{color:rgba(255,255,255,.78);font-size:14px;line-height:1.6}
.sticky-text strong{color:var(--gold-2);font-weight:800}
.sticky-inner .btn{padding:10px 22px;font-size:14px;flex:none}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr .8fr .8fr;gap:40px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);max-width:440px}
.footer-col h3{font-size:14px;color:#fff;font-weight:800;margin-bottom:14px;letter-spacing:.5px}
.footer-col a{display:block;font-size:13.8px;color:rgba(255,255,255,.6);padding:5px 0;transition:color .2s,transform .2s}
.footer-col a:hover{color:var(--gold-2);transform:translateX(3px)}
.footer-bottom{
 margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
 display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
 font-size:13px;color:rgba(255,255,255,.45);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
 .nav-toggle{display:flex}
 .header-main{
  display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;
  align-items:stretch;gap:14px;background:#12162e;
  border-top:1px solid rgba(255,255,255,.1);
  padding:16px 20px 20px;box-shadow:var(--shadow-md);
 }
 .header-main.open{display:flex}
 .main-nav{flex-direction:column;gap:2px}
 .main-nav a{padding:11px 14px;border-radius:12px;font-size:15px}
 .header-tools{margin-left:0;flex-wrap:wrap}
 .search-box{flex:1 1 200px}
 .search-box input{width:100%}
 .hero-grid{grid-template-columns:1fr;gap:34px}
 .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
 .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
 .tier-layout{grid-template-columns:1fr;gap:28px}
 .cta-band{grid-template-columns:1fr;padding:36px 28px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
 .footer-brand{grid-column:1 / -1}
}
@media (max-width:768px){
 body{padding-bottom:104px}
 .section{padding:54px 0}
 .page-hero{padding:48px 0 50px}
 .grid-3,.grid-2{grid-template-columns:1fr}
 .grid-4{grid-template-columns:1fr}
 .flow{grid-template-columns:1fr}
 .hero-actions .btn{flex:1 1 200px}
 .compare-head{display:none}
 .compare-row{grid-template-columns:1fr}
 .compare-row > div + div{border-left:0;border-top:1px dashed var(--line)}
 .compare-row .c-question{background:var(--surface-2)}
 .sticky-inner{flex-direction:column;align-items:stretch;gap:10px;text-align:center}
 .sticky-inner .btn{width:100%}
 .tier{grid-template-columns:44px minmax(0,1fr) auto;gap:12px;padding:14px}
 .tier-desc{font-size:12.6px}
}
@media (max-width:520px){
 .wrap{padding:0 16px}
 .brand{font-size:16px}
 .page-hero h1{font-size:24px}
 .hero-sub{font-size:15.5px}
 .hero-desc{font-size:14.4px}
 .metric{padding:20px 18px}
 .metric-num{font-size:25px}
 .hero-panel{padding:20px}
 .panel-total .num{font-size:20px}
 .tier-x{font-size:13.5px;padding:4px 10px}
 .footer-grid{grid-template-columns:1fr}
 .cta-band{padding:30px 22px}
 .faq-item summary{padding:16px 52px 16px 18px;font-size:14.6px}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}