/* roulang page: index */
:root{
  --brand:#1d5fc4;
  --brand-2:#3d8ce8;
  --brand-dark:#123f85;
  --brand-soft:#e9f1ff;
  --ink:#0f1a2b;
  --ink-2:#33415c;
  --muted:#65758e;
  --line:#e2e9f4;
  --line-strong:#cfdcee;
  --bg:#f5f8fd;
  --bg-tint:#eef4fc;
  --card:#ffffff;
  --radius-lg:18px;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 2px 8px rgba(16,40,80,.06);
  --shadow:0 10px 28px rgba(16,40,80,.09);
  --shadow-lg:0 20px 44px rgba(16,40,80,.14);
  --container:1180px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
p{margin:0;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:200;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(16,40,80,.10);}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  min-height:64px;gap:18px;position:relative;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--ink);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 34px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;display:grid;place-items:center;font-size:16px;font-weight:700;
  box-shadow:0 6px 14px rgba(29,95,196,.28);
}
.brand-text{white-space:nowrap;}
.nav-wrap{display:flex;align-items:center;gap:22px;}
.nav-list{display:flex;align-items:center;gap:4px;}
.nav-link{
  display:inline-block;padding:8px 12px;border-radius:9px;
  font-size:15px;color:var(--ink-2);transition:background .2s,color .2s;
  white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:#eef4ff;}
.nav-link.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-cta{
  display:inline-block;padding:9px 18px;border-radius:9px;
  background:var(--brand);color:#fff;font-size:14.5px;font-weight:600;
  transition:background .2s,transform .2s,box-shadow .2s;
  box-shadow:0 8px 18px rgba(29,95,196,.25);white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 22px rgba(29,95,196,.3);color:#fff;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  background:#fff;border-radius:11px;cursor:pointer;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;
  transition:border-color .2s,box-shadow .2s;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s,opacity .22s;}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- buttons & tags ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:9px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:background .2s,color .2s,transform .2s,box-shadow .2s,border-color .2s;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 22px rgba(29,95,196,.26);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(29,95,196,.32);color:#fff;}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--line-strong);box-shadow:var(--shadow-sm);}
.btn-outline:hover{border-color:var(--brand);background:#f4f8ff;transform:translateY(-2px);color:var(--brand);}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.btn-sm{padding:9px 18px;font-size:14px;}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-block;padding:6px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line-strong);
  font-size:13.5px;color:var(--ink-2);box-shadow:var(--shadow-sm);
}
.chip{
  display:inline-block;padding:4px 10px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);
  font-size:12.5px;font-weight:600;letter-spacing:.01em;
}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:60px 0 54px;
  background:linear-gradient(180deg,#eef5ff 0%,#f7faff 62%,var(--bg) 100%);
}
.hero::before,.hero::after{
  content:"";position:absolute;border-radius:50%;pointer-events:none;
}
.hero::before{
  width:520px;height:520px;right:-160px;top:-220px;
  background:radial-gradient(circle at 30% 30%,rgba(61,140,232,.20),rgba(61,140,232,0) 68%);
}
.hero::after{
  width:420px;height:420px;left:-180px;bottom:-240px;
  background:radial-gradient(circle at 60% 40%,rgba(29,95,196,.14),rgba(29,95,196,0) 70%);
}
.hero-grid{
  position:relative;display:grid;grid-template-columns:1.12fr .88fr;
  gap:48px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;background:#fff;
  border:1px solid var(--line-strong);box-shadow:var(--shadow-sm);
  font-size:13.5px;color:var(--brand-dark);font-weight:600;margin-bottom:18px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:#2bb673;box-shadow:0 0 0 4px rgba(43,182,115,.16);}
.hero-title{
  font-size:42px;line-height:1.24;font-weight:800;letter-spacing:-.02em;
  margin-bottom:18px;color:var(--ink);
}
.hero-title em{font-style:normal;color:var(--brand);}
.hero-lead{
  font-size:15.5px;line-height:1.85;color:var(--muted);
  max-width:590px;margin-bottom:24px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px;}
.hero-note{
  font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px;margin-bottom:20px;
}
.hero-note svg{flex:0 0 16px;color:var(--brand);}

/* countdown card */
.countdown-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);padding:28px 26px;position:relative;
}
.countdown-card h3{
  font-size:16.5px;margin-bottom:6px;
}
.countdown-sub{font-size:13px;color:var(--muted);margin-bottom:20px;}
.count-ring{
  width:158px;height:158px;border-radius:50%;margin:0 auto 16px;
  background:conic-gradient(var(--brand) calc(var(--p,0) * 1%),#e8effb 0);
  display:grid;place-items:center;position:relative;
  transition:background .4s linear;
}
.ring-inner{
  width:124px;height:124px;border-radius:50%;background:#fff;
  display:grid;place-items:center;text-align:center;padding:8px;
  box-shadow:inset 0 2px 10px rgba(16,40,80,.07);
}
.ring-inner .label{font-size:12px;color:var(--muted);line-height:1.4;}
.count-time{
  font-variant-numeric:tabular-nums;font-size:17px;font-weight:700;
  color:var(--brand-dark);letter-spacing:.02em;line-height:1.3;
}
.count-list{margin:20px 0 0;display:grid;gap:10px;}
.count-list li{
  display:flex;gap:10px;font-size:14px;color:var(--ink-2);line-height:1.6;
}
.count-list .tick{
  flex:0 0 18px;width:18px;height:18px;border-radius:50%;
  background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;
  font-size:11px;font-weight:700;margin-top:3px;
}
.countdown-card .btn{width:100%;margin-top:20px;}

/* ---------- stats strip ---------- */
.stats-strip{
  background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:26px 0;
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.stat-item{text-align:center;padding:6px 10px;border-right:1px dashed var(--line);}
.stat-item:last-child{border-right:none;}
.stat-num{font-size:28px;font-weight:800;color:var(--brand-dark);line-height:1.2;letter-spacing:-.02em;}
.stat-num span{font-size:14px;font-weight:600;color:var(--muted);margin-left:3px;}
.stat-label{font-size:13.5px;color:var(--muted);margin-top:4px;}

/* ---------- sections ---------- */
.section{padding:64px 0;}
.section--soft{background:var(--bg-tint);}
.section--white{background:#fff;}
.section--dark{
  background:linear-gradient(150deg,#123f85,#1b56a8 55%,#2f78cf);
  color:#fff;
}
.section--dark .section-title,.section--dark h3{color:#fff;}
.section--dark .section-desc{color:rgba(255,255,255,.82);}
.section-head{max-width:720px;margin-bottom:34px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.06em;
  color:var(--brand-dark);background:var(--brand-soft);
  padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.section--dark .eyebrow{background:rgba(255,255,255,.15);color:#fff;}
.section-title{font-size:29px;line-height:1.32;margin-bottom:12px;}
.section-desc{font-size:15px;color:var(--muted);line-height:1.8;}
.section-head.center .section-desc{margin-left:auto;margin-right:auto;}

/* ---------- generic cards ---------- */
.card-grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
.info-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  height:100%;
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.card-icon{
  width:42px;height:42px;border-radius:12px;background:var(--brand-soft);
  color:var(--brand);display:grid;place-items:center;margin-bottom:16px;
}
.card-icon svg{width:21px;height:21px;}
.card-title{font-size:17px;margin-bottom:8px;}
.card-text{font-size:14.3px;color:var(--muted);line-height:1.75;}
.card-foot{margin-top:14px;}

/* ---------- category wall ---------- */
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.category-card{
  position:relative;display:block;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 24px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s,box-shadow .2s,border-color .2s;height:100%;
  overflow:hidden;
}
.category-card::after{
  content:"";position:absolute;right:-40px;top:-40px;width:120px;height:120px;
  border-radius:50%;background:radial-gradient(circle,rgba(61,140,232,.16),rgba(61,140,232,0) 70%);
  transition:transform .3s;
}
.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand-2);}
.category-card:hover::after{transform:scale(1.25);}
.category-index{
  font-size:12.5px;font-weight:700;color:var(--brand);letter-spacing:.08em;margin-bottom:10px;
}
.category-card h3{font-size:18px;margin-bottom:10px;}
.category-card p{font-size:14.2px;color:var(--muted);line-height:1.75;margin-bottom:16px;}
.category-more{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand);
}
.category-more svg{width:15px;height:15px;transition:transform .2s;}
.category-card:hover .category-more svg{transform:translateX(4px);}

/* ---------- topic cards ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.topic-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .2s,box-shadow .2s,border-color .2s;height:100%;
  display:flex;flex-direction:column;
}
.topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.topic-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#dce7f7;}
.topic-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.topic-card:hover .topic-media img{transform:scale(1.05);}
.topic-media .chip{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);color:var(--brand-dark);}
.topic-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.topic-body h3{font-size:16.5px;line-height:1.5;}
.topic-body p{font-size:14px;color:var(--muted);line-height:1.72;flex:1;}
.topic-meta{font-size:12.8px;color:var(--muted);display:flex;gap:12px;align-items:center;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 20px;box-shadow:var(--shadow-sm);position:relative;
  transition:transform .2s,box-shadow .2s;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.step-num{
  width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:15px;margin-bottom:14px;
  box-shadow:0 8px 16px rgba(29,95,196,.24);
}
.step h3{font-size:16px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);line-height:1.72;}

/* ---------- path / timeline ---------- */
.path-list{display:grid;gap:16px;}
.path-item{
  display:grid;grid-template-columns:120px 1fr;gap:20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-sm);align-items:start;
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.path-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.path-level{font-size:15px;font-weight:700;color:var(--brand-dark);}
.path-level small{display:block;font-size:12.5px;font-weight:600;color:var(--muted);margin-top:4px;}
.path-item p{font-size:14.3px;color:var(--muted);line-height:1.75;}

/* ---------- compare ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.compare-col{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);
}
.compare-col.good{border-color:#bfd7f7;box-shadow:0 12px 30px rgba(29,95,196,.10);}
.compare-col h3{font-size:17px;margin-bottom:14px;display:flex;align-items:center;gap:10px;}
.compare-col .mark{
  width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  font-size:13px;font-weight:700;background:#eef1f6;color:#8b96a8;
}
.compare-col.good .mark{background:var(--brand-soft);color:var(--brand);}
.compare-col li{
  font-size:14.3px;color:var(--muted);line-height:1.75;padding:10px 0 10px 18px;
  position:relative;border-top:1px dashed var(--line);
}
.compare-col li:first-child{border-top:none;}
.compare-col li::before{
  content:"";position:absolute;left:0;top:19px;width:7px;height:7px;border-radius:50%;
  background:#c3cddd;
}
.compare-col.good li::before{background:var(--brand-2);}

/* ---------- quotes ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.quote-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s,box-shadow .2s;
}
.quote-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.quote-text{font-size:14.5px;color:var(--ink-2);line-height:1.8;margin-bottom:16px;}
.quote-user{display:flex;align-items:center;gap:12px;}
.avatar{
  width:38px;height:38px;border-radius:50%;background:var(--brand-soft);
  color:var(--brand-dark);display:grid;place-items:center;font-weight:700;font-size:15px;
}
.quote-user .name{font-size:14px;font-weight:600;}
.quote-user .role{font-size:12.5px;color:var(--muted);}

/* ---------- community ---------- */
.community{
  position:relative;border-radius:var(--radius-lg);overflow:hidden;
  padding:52px 46px;color:#fff;
  background-image:linear-gradient(105deg,rgba(13,42,88,.90) 0%,rgba(20,63,128,.80) 48%,rgba(29,95,196,.58) 100%),
    url('/assets/images/红中麻将的快乐_搓一局解心宽.webp');
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-lg);
}
.community h2{color:#fff;font-size:27px;line-height:1.35;margin-bottom:14px;max-width:640px;}
.community p{color:rgba(255,255,255,.86);font-size:15px;line-height:1.85;max-width:640px;margin-bottom:22px;}
.community .tag-list .tag{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.28);color:#fff;box-shadow:none;}

/* ---------- audience ---------- */
.audience-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.audience-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:var(--shadow-sm);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.audience-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand-2);}
.audience-item h3{font-size:16px;margin-bottom:8px;}
.audience-item p{font-size:13.8px;color:var(--muted);line-height:1.72;}

/* ---------- rank ---------- */
.rank-list{display:grid;gap:14px;}
.rank-item{
  display:grid;grid-template-columns:44px 1fr 88px;gap:16px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 20px;box-shadow:var(--shadow-sm);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.rank-item:hover{transform:translateX(3px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.rank-no{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  font-weight:700;font-size:14px;background:#eef2f9;color:var(--ink-2);
}
.rank-item:nth-child(1) .rank-no{background:var(--brand);color:#fff;}
.rank-item:nth-child(2) .rank-no{background:var(--brand-2);color:#fff;}
.rank-item:nth-child(3) .rank-no{background:#9dc2ee;color:#123f85;}
.rank-title{font-size:15px;font-weight:600;margin-bottom:8px;}
.rank-bar{height:6px;border-radius:999px;background:#eaf0f9;overflow:hidden;}
.rank-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--brand-2));}
.rank-val{font-size:13px;color:var(--muted);text-align:right;font-variant-numeric:tabular-nums;}

/* ---------- changelog ---------- */
.log-list{display:grid;gap:0;}
.log-item{
  display:grid;grid-template-columns:130px 1fr;gap:22px;
  padding:20px 0;border-bottom:1px dashed var(--line);align-items:start;
}
.log-item:last-child{border-bottom:none;}
.log-ver{
  font-size:14px;font-weight:700;color:var(--brand-dark);
  background:var(--brand-soft);border-radius:8px;padding:6px 12px;text-align:center;
}
.log-text{font-size:14.3px;color:var(--muted);line-height:1.78;}

/* ---------- news ---------- */
.news-layout{display:grid;grid-template-columns:1.55fr .85fr;gap:26px;align-items:start;}
.news-list{display:grid;gap:14px;}
.news-item{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--brand-2);}
.news-meta{display:flex;align-items:center;gap:12px;font-size:12.8px;color:var(--muted);margin-bottom:10px;}
.news-title{font-size:16.5px;line-height:1.55;margin-bottom:8px;}
.news-text{font-size:14px;color:var(--muted);line-height:1.75;}
.news-side{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px 26px;box-shadow:var(--shadow-sm);
}
.news-side h3{font-size:16px;margin-bottom:14px;}
.side-item{
  display:block;padding:13px 0;border-top:1px dashed var(--line);
  transition:color .2s;
}
.side-item:first-of-type{border-top:none;padding-top:0;}
.side-item:hover .side-title{color:var(--brand);}
.side-title{font-size:14.3px;font-weight:600;line-height:1.6;margin-bottom:4px;transition:color .2s;}
.side-date{font-size:12.5px;color:var(--muted);}
.news-empty{
  background:#fff;border:1px dashed var(--line-strong);border-radius:var(--radius);
  padding:30px;text-align:center;color:var(--muted);font-size:14.5px;
}
.news-more{margin-top:20px;}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:border-color .2s,box-shadow .2s;
}
.faq-item:hover{border-color:var(--brand-2);box-shadow:var(--shadow);}
.faq-q{font-size:16px;font-weight:700;margin-bottom:10px;display:flex;gap:10px;}
.faq-q .q-mark{color:var(--brand);flex:0 0 auto;}
.faq-a{font-size:14.4px;color:var(--muted);line-height:1.82;padding-left:26px;}

/* ---------- cta ---------- */
.cta-band{
  background:linear-gradient(120deg,#123f85,#1d5fc4 58%,#3d8ce8);
  border-radius:var(--radius-lg);padding:48px 44px;color:#fff;
  box-shadow:var(--shadow-lg);display:flex;align-items:center;
  justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:26px;line-height:1.35;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.85);font-size:14.8px;line-height:1.8;max-width:620px;}
.cta-band .btn-primary{background:#fff;color:var(--brand-dark);box-shadow:0 12px 26px rgba(0,0,0,.18);}
.cta-band .btn-primary:hover{background:#eef5ff;color:var(--brand-dark);}

/* ---------- footer ---------- */
.site-footer{
  background:#0d1c33;color:rgba(255,255,255,.76);
  padding:52px 0 0;margin-top:64px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding-bottom:38px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{box-shadow:none;}
.footer-brand span{font-size:16.5px;font-weight:700;color:#fff;}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:360px;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .2s;}
.footer-col a:hover{color:#fff;}
.footer-col p{font-size:14px;color:rgba(255,255,255,.62);line-height:1.8;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.52);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-title{font-size:36px;}
  .countdown-card{max-width:460px;}
  .grid-4,.audience-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .topic-grid,.category-grid,.quote-grid,.grid-3{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:none;}
  .news-layout{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:991px){
  .nav-toggle{display:flex;}
  .nav-wrap{
    position:absolute;top:calc(100% + 1px);left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 18px 32px rgba(16,40,80,.12);
    flex-direction:column;align-items:stretch;gap:12px;
    padding:14px 20px 20px;display:none;
  }
  .nav-wrap.open{display:flex;}
  .nav-list{flex-direction:column;align-items:stretch;gap:4px;}
  .nav-link{display:block;padding:11px 14px;font-size:15px;}
  .nav-cta{width:100%;text-align:center;padding:12px 18px;font-size:15px;}
}
@media (max-width:768px){
  .section{padding:48px 0;}
  .hero{padding:44px 0 40px;}
  .hero-title{font-size:30px;}
  .hero-lead{font-size:14.8px;}
  .section-title{font-size:24px;}
  .grid-2,.grid-3,.grid-4,.category-grid,.topic-grid,.quote-grid,.steps,.audience-grid{grid-template-columns:1fr;}
  .compare-grid{grid-template-columns:1fr;}
  .path-item{grid-template-columns:1fr;gap:10px;}
  .log-item{grid-template-columns:1fr;gap:10px;}
  .community{padding:34px 24px;}
  .community h2{font-size:22px;}
  .cta-band{padding:32px 24px;}
  .cta-band h2{font-size:21px;}
  .rank-item{grid-template-columns:38px 1fr;row-gap:8px;}
  .rank-val{text-align:left;grid-column:2;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .stats-grid{gap:14px;}
  .stat-item{border-right:none;border-bottom:1px dashed var(--line);padding-bottom:14px;}
  .stat-item:nth-child(3),.stat-item:nth-child(4){border-bottom:none;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .hero-title{font-size:26px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .brand-text{font-size:15px;}
  .count-ring{width:138px;height:138px;}
  .ring-inner{width:108px;height:108px;}
  .btn{padding:11px 18px;font-size:14.5px;}
  .news-item{padding:18px 16px;}
  .faq-item{padding:18px 16px;}
  .quote-card,.info-card{padding:20px 18px;}
}

/* roulang page: category1 */
:root{
 --brand:#1d5fc4;
 --brand-2:#3d8ce8;
 --brand-dark:#123f85;
 --brand-soft:#e9f1ff;
 --ink:#0f1a2b;
 --ink-2:#33415c;
 --muted:#65758e;
 --line:#e2e9f4;
 --line-strong:#cfdcee;
 --bg:#f5f8fd;
 --bg-tint:#eef4fc;
 --card:#ffffff;
 --radius-lg:18px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 2px 8px rgba(16,40,80,.06);
 --shadow:0 10px 28px rgba(16,40,80,.09);
 --shadow-lg:0 20px 44px rgba(16,40,80,.14);
 --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:200;
 background:rgba(255,255,255,.95);
 backdrop-filter:blur(10px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(16,40,80,.10);}
.header-inner{
 display:flex;align-items:center;justify-content:space-between;
 min-height:64px;gap:18px;position:relative;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--ink);}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:0 0 34px;
 background:linear-gradient(135deg,var(--brand),var(--brand-2));
 color:#fff;display:grid;place-items:center;font-size:16px;font-weight:700;
 box-shadow:0 6px 14px rgba(29,95,196,.28);
}
.brand-text{white-space:nowrap;}
.nav-wrap{display:flex;align-items:center;gap:22px;}
.nav-list{display:flex;align-items:center;gap:4px;}
.nav-link{
 display:inline-block;padding:8px 12px;border-radius:9px;
 font-size:15px;color:var(--ink-2);transition:background .2s,color .2s;white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:#eef4ff;}
.nav-link.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-cta{
 display:inline-block;padding:9px 18px;border-radius:9px;
 background:var(--brand);color:#fff;font-size:14.5px;font-weight:600;
 transition:background .2s,transform .2s,box-shadow .2s;
 box-shadow:0 8px 18px rgba(29,95,196,.25);white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 22px rgba(29,95,196,.3);color:#fff;}
.nav-toggle{
 display:none;width:44px;height:44px;border:1px solid var(--line);
 background:#fff;border-radius:11px;cursor:pointer;
 flex-direction:column;justify-content:center;align-items:center;gap:5px;
 transition:border-color .2s,box-shadow .2s;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s,opacity .22s;}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
/* ---------- buttons & tags ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:12px 24px;border-radius:9px;font-size:15px;font-weight:600;
 border:1px solid transparent;cursor:pointer;
 transition:background .2s,color .2s,transform .2s,box-shadow .2s,border-color .2s;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 22px rgba(29,95,196,.26);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(29,95,196,.32);color:#fff;}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--line-strong);box-shadow:var(--shadow-sm);}
.btn-outline:hover{border-color:var(--brand);background:#f4f8ff;transform:translateY(-2px);color:var(--brand);}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.btn-sm{padding:9px 18px;font-size:14px;}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
 display:inline-block;padding:6px 14px;border-radius:999px;
 background:#fff;border:1px solid var(--line-strong);
 font-size:13.5px;color:var(--ink-2);box-shadow:var(--shadow-sm);
}
.chip{
 display:inline-block;padding:4px 10px;border-radius:999px;
 background:var(--brand-soft);color:var(--brand-dark);
 font-size:12.5px;font-weight:600;letter-spacing:.01em;
}
/* ---------- sections ---------- */
.section{padding:64px 0;}
.section--tint{background:var(--bg-tint);}
.section--white{background:#fff;}
.section-head{max-width:780px;margin-bottom:34px;}
.section-kicker{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12.5px;font-weight:700;letter-spacing:.12em;
 color:var(--brand);text-transform:uppercase;
}
.section-kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand);}
.section-title{font-size:28px;font-weight:800;letter-spacing:-.01em;line-height:1.35;margin:10px 0 10px;}
.section-lead{font-size:15px;color:var(--muted);line-height:1.85;}
/* ---------- hero ---------- */
.hero{
 position:relative;overflow:hidden;padding:56px 0 62px;
 background:linear-gradient(180deg,#eef5ff 0%,#f7faff 62%,var(--bg) 100%);
}
.hero-media{
 position:absolute;inset:0;
 background-image:url('/assets/images/红中_九江麻将.webp');
 background-size:cover;background-position:center;
 opacity:.14;
}
.hero::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(100deg,rgba(238,245,255,.97) 0%,rgba(238,245,255,.86) 48%,rgba(238,245,255,.55) 100%);
 pointer-events:none;
}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:44px;align-items:center;}
.hero-badge{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;background:#fff;
 border:1px solid var(--line-strong);box-shadow:var(--shadow-sm);
 font-size:13.5px;color:var(--brand-dark);font-weight:600;margin-bottom:18px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:#2bb673;box-shadow:0 0 0 4px rgba(43,182,115,.16);}
.hero-title{font-size:40px;line-height:1.26;font-weight:800;letter-spacing:-.02em;margin-bottom:16px;}
.hero-title em{font-style:normal;color:var(--brand);}
.hero-lead{font-size:15.5px;line-height:1.85;color:var(--muted);max-width:560px;margin-bottom:24px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.hero .tag-list{margin-top:6px;}
/* before / after */
.compare{display:grid;gap:16px;}
.compare-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
 box-shadow:var(--shadow);padding:22px 24px;
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.compare-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.compare-card h3{font-size:15px;font-weight:700;display:flex;align-items:center;gap:9px;margin-bottom:14px;}
.badge-dot{width:9px;height:9px;border-radius:50%;flex:0 0 9px;}
.compare-before .badge-dot{background:#e2574c;}
.compare-after .badge-dot{background:#2bb673;}
.compare-before{border-color:#f0d9d6;}
.compare-after{border-color:#bcd4f5;box-shadow:0 16px 34px rgba(29,95,196,.14);}
.compare-list li{
 display:flex;gap:10px;align-items:flex-start;
 font-size:14px;color:var(--ink-2);line-height:1.7;
 padding:8px 0;border-bottom:1px dashed var(--line);
}
.compare-list li:last-child{border-bottom:0;padding-bottom:0;}
.compare-list .mark{flex:0 0 18px;font-weight:700;line-height:1.7;}
.compare-before .mark{color:#c9483c;}
.compare-after .mark{color:var(--brand);}
.compare-list strong{color:var(--ink);}
/* ---------- cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.card-grid--3{grid-template-columns:repeat(3,1fr);}
.info-card{
 background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:24px;height:100%;
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.card-icon{
 width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
 background:var(--brand-soft);color:var(--brand);margin-bottom:16px;
}
.card-icon svg{width:20px;height:20px;}
.info-card h3{font-size:16.5px;font-weight:700;margin-bottom:8px;}
.info-card p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.card-code{
 display:inline-block;margin-top:14px;padding:3px 9px;border-radius:6px;
 background:#f2f7ff;color:var(--brand-dark);font-size:12.5px;font-weight:600;
 letter-spacing:.02em;
}
/* media cards */
.media-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;height:100%;
 transition:transform .2s,box-shadow .2s,border-color .2s;
 display:flex;flex-direction:column;
}
.media-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.media-card figure{margin:0;overflow:hidden;background:#eaf1fb;}
.media-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease;}
.media-card:hover img{transform:scale(1.04);}
.media-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.media-body h3{font-size:16.5px;font-weight:700;line-height:1.5;}
.media-body p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.media-body .chip{align-self:flex-start;margin-top:auto;}
/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.step{
 position:relative;background:#fff;border:1px solid var(--line);
 border-radius:var(--radius);padding:26px 22px 24px;
 box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s,border-color .2s;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.step-num{
 display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;
 background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;
 font-size:14px;font-weight:700;margin-bottom:14px;
 box-shadow:0 8px 16px rgba(29,95,196,.24);
}
.step h3{font-size:16px;font-weight:700;margin-bottom:8px;}
.step p{font-size:14px;color:var(--muted);line-height:1.8;}
/* ---------- table ---------- */
.table-wrap{
 overflow-x:auto;background:#fff;border:1px solid var(--line);
 border-radius:var(--radius);box-shadow:var(--shadow-sm);
}
.rule-table{width:100%;border-collapse:collapse;min-width:680px;}
.rule-table thead th{
 background:#f2f7ff;color:var(--brand-dark);font-size:13.5px;font-weight:700;
 text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.rule-table tbody td{padding:15px 18px;border-bottom:1px solid var(--line);font-size:14.5px;color:var(--ink-2);vertical-align:top;line-height:1.8;}
.rule-table tbody tr:last-child td{border-bottom:0;}
.rule-table tbody tr:hover{background:#f8fbff;}
.rule-table strong{color:var(--ink);}
.rule-table .code-cell{font-weight:700;color:var(--brand-dark);white-space:nowrap;}
/* ---------- metrics ---------- */
.metrics{
 background:linear-gradient(135deg,var(--brand-dark) 0%,var(--brand) 62%,var(--brand-2) 100%);
 border-radius:var(--radius-lg);padding:42px 40px;color:#fff;box-shadow:var(--shadow-lg);
 display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:center;
}
.metrics h2{font-size:25px;font-weight:800;line-height:1.4;margin-bottom:12px;}
.metrics p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.82);}
.metrics-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.metric-num{font-size:32px;font-weight:800;line-height:1.2;letter-spacing:-.02em;}
.metric-label{font-size:13.5px;color:rgba(255,255,255,.78);}
.metric{border-left:2px solid rgba(255,255,255,.28);padding-left:14px;}
/* ---------- faq ---------- */
.faq-list{max-width:900px;}
.faq-item{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:4px 22px;margin-bottom:12px;
 transition:border-color .2s,box-shadow .2s;
}
.faq-item summary{
 cursor:pointer;list-style:none;padding:16px 0;
 font-weight:600;font-size:15.5px;color:var(--ink);
 display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";color:var(--brand);font-size:20px;font-weight:600;line-height:1;}
.faq-item[open] summary::after{content:"–";}
.faq-item[open]{border-color:var(--line-strong);box-shadow:var(--shadow);}
.faq-item p{padding:0 0 18px;font-size:14.5px;color:var(--ink-2);line-height:1.85;}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px;}
/* ---------- post list ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.post-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:22px;height:100%;
 display:flex;flex-direction:column;gap:10px;
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.post-card h3{font-size:16px;font-weight:700;line-height:1.55;}
.post-card a:hover h3{color:var(--brand);}
.post-card p{font-size:14px;color:var(--muted);line-height:1.8;}
.post-meta{
 display:flex;align-items:center;justify-content:space-between;gap:10px;
 font-size:12.5px;color:var(--muted);margin-top:auto;padding-top:6px;
}
.empty-note{
 background:#fff;border:1px dashed var(--line-strong);border-radius:var(--radius);
 padding:28px;color:var(--muted);font-size:14.5px;text-align:center;
}
/* ---------- cta ---------- */
.cta-band{
 background:linear-gradient(135deg,#123f85 0%,#1d5fc4 70%,#3d8ce8 100%);
 border-radius:var(--radius-lg);padding:44px 46px;color:#fff;
 display:flex;align-items:center;justify-content:space-between;gap:32px;
 box-shadow:var(--shadow-lg);
}
.cta-band h2{font-size:26px;font-weight:800;line-height:1.4;margin-bottom:10px;}
.cta-band p{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.84);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto;}
.cta-band .btn-primary{background:#fff;color:var(--brand-dark);box-shadow:0 12px 24px rgba(4,20,50,.24);}
.cta-band .btn-primary:hover{background:#eaf2ff;color:var(--brand-dark);}
.cta-band .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);box-shadow:none;}
.cta-band .btn-outline:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;}
/* ---------- footer ---------- */
.site-footer{background:#0d1c33;color:rgba(255,255,255,.72);padding:52px 0 26px;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.12);}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16.5px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:420px;}
.footer-col h3{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.02em;}
.footer-col ul li{margin-bottom:9px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color .2s;}
.footer-col a:hover{color:#fff;}
.footer-col a:focus-visible{outline:2px solid #7fb3f5;outline-offset:3px;border-radius:4px;}
.footer-col p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.58);}
.footer-bottom{
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 padding-top:22px;font-size:13px;color:rgba(255,255,255,.5);flex-wrap:wrap;
}
/* ---------- responsive ---------- */
@media (max-width:1024px){
 .hero-title{font-size:34px;}
 .hero-grid{grid-template-columns:1fr;gap:32px;}
 .card-grid{grid-template-columns:repeat(2,1fr);}
 .card-grid--3{grid-template-columns:repeat(2,1fr);}
 .steps{grid-template-columns:repeat(2,1fr);}
 .post-grid{grid-template-columns:repeat(2,1fr);}
 .metrics{grid-template-columns:1fr;padding:34px 30px;gap:26px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:991px){
 .nav-toggle{display:flex;}
 .nav-wrap{
  position:absolute;top:100%;left:0;right:0;
  display:none;flex-direction:column;align-items:stretch;gap:12px;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 18px 32px rgba(16,40,80,.14);
  padding:14px 20px 20px;
 }
 .nav-wrap.open{display:flex;}
 .nav-list{flex-direction:column;align-items:stretch;gap:2px;}
 .nav-link{display:block;padding:12px 14px;font-size:15px;}
 .nav-cta{text-align:center;padding:12px 18px;}
}
@media (max-width:768px){
 .section{padding:48px 0;}
 .hero{padding:40px 0 46px;}
 .hero-title{font-size:29px;}
 .hero-lead{font-size:15px;}
 .section-title{font-size:23px;}
 .card-grid,.card-grid--3{grid-template-columns:1fr;}
 .steps{grid-template-columns:1fr;}
 .post-grid{grid-template-columns:1fr;}
 .cta-band{flex-direction:column;align-items:flex-start;padding:32px 26px;gap:22px;}
 .cta-band h2{font-size:22px;}
 .metrics{padding:28px 24px;}
 .metric-num{font-size:27px;}
 .footer-grid{grid-template-columns:1fr;}
 .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:520px){
 .container{padding:0 16px;}
 .hero-title{font-size:26px;}
 .hero-actions .btn{width:100%;}
 .btn{padding:12px 18px;}
 .faq-item{padding:2px 16px;}
 .compare-card{padding:18px 18px;}
 .metrics-grid{grid-template-columns:1fr;gap:16px;}
 .brand-text{font-size:15.5px;}
}

/* roulang page: article */
:root{
 --brand:#1d5fc4;
 --brand-2:#3d8ce8;
 --brand-dark:#123f85;
 --brand-soft:#e9f1ff;
 --ink:#0f1a2b;
 --ink-2:#33415c;
 --muted:#65758e;
 --line:#e2e9f4;
 --line-strong:#cfdcee;
 --bg:#f5f8fd;
 --bg-tint:#eef4fc;
 --card:#ffffff;
 --radius-lg:18px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 2px 8px rgba(16,40,80,.06);
 --shadow:0 10px 28px rgba(16,40,80,.09);
 --shadow-lg:0 20px 44px rgba(16,40,80,.14);
 --container:1180px;
}
*,
*::before,
*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
 text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin-top:0;}
ul,ol{padding-left:1.2em;}
::selection{background:rgba(61,140,232,.24);color:var(--ink);}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.container{
 width:100%;
 max-width:var(--container);
 margin:0 auto;
 padding:0 20px;
}
/* header */
.site-header{
 position:sticky;
 top:0;
 z-index:200;
 background:rgba(255,255,255,.95);
 backdrop-filter:blur(10px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(16,40,80,.10);}
.header-inner{
 display:flex;
 align-items:center;
 justify-content:space-between;
 min-height:64px;
 gap:18px;
 position:relative;
}
.brand{
 display:inline-flex;
 align-items:center;
 gap:10px;
 font-weight:700;
 font-size:17px;
 color:var(--ink);
 flex:0 0 auto;
}
.brand-mark{
 width:34px;
 height:34px;
 border-radius:10px;
 flex:0 0 34px;
 background:linear-gradient(135deg,var(--brand),var(--brand-2));
 color:#fff;
 display:grid;
 place-items:center;
 font-size:16px;
 font-weight:700;
 box-shadow:0 6px 14px rgba(29,95,196,.28);
}
.brand-text{white-space:nowrap;}
.nav-wrap{display:flex;align-items:center;gap:22px;}
.nav-list{display:flex;align-items:center;gap:4px;margin:0;padding:0;list-style:none;}
.nav-link{
 display:inline-block;
 padding:8px 12px;
 border-radius:9px;
 font-size:15px;
 color:var(--ink-2);
 transition:background .2s,color .2s;
 white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:#eef4ff;}
.nav-link.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-cta{
 display:inline-block;
 padding:9px 18px;
 border-radius:9px;
 background:var(--brand);
 color:#fff;
 font-size:14.5px;
 font-weight:600;
 transition:background .2s,transform .2s,box-shadow .2s;
 box-shadow:0 8px 18px rgba(29,95,196,.25);
 white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 22px rgba(29,95,196,.3);color:#fff;}
.nav-toggle{
 display:none;
 width:44px;
 height:44px;
 border:1px solid var(--line);
 background:#fff;
 border-radius:11px;
 cursor:pointer;
 flex-direction:column;
 justify-content:center;
 align-items:center;
 gap:5px;
 transition:border-color .2s,box-shadow .2s;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s,opacity .22s;}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
/* buttons tags */
.btn{
 display:inline-flex;
 align-items:center;
 justify-content:center;
 gap:8px;
 padding:12px 24px;
 border-radius:9px;
 font-size:15px;
 font-weight:600;
 border:1px solid transparent;
 cursor:pointer;
 transition:background .2s,color .2s,transform .2s,box-shadow .2s,border-color .2s;
 line-height:1.3;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 22px rgba(29,95,196,.26);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(29,95,196,.32);color:#fff;}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--line-strong);box-shadow:var(--shadow-sm);}
.btn-outline:hover{border-color:var(--brand);background:#f4f8ff;transform:translateY(-2px);color:var(--brand);}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-light{background:#fff;color:var(--brand-dark);box-shadow:0 12px 26px rgba(5,22,52,.18);}
.btn-light:hover{background:#f3f7ff;color:var(--brand-dark);transform:translateY(-2px);}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.42);}
.btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff;border-color:#fff;transform:translateY(-2px);}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
 display:inline-block;
 padding:6px 14px;
 border-radius:999px;
 background:#fff;
 border:1px solid var(--line-strong);
 font-size:13.5px;
 color:var(--ink-2);
 box-shadow:var(--shadow-sm);
}
.chip{
 display:inline-block;
 padding:4px 10px;
 border-radius:999px;
 background:var(--brand-soft);
 color:var(--brand-dark);
 font-size:12.5px;
 font-weight:600;
 letter-spacing:.01em;
}
/* article hero */
.article-hero{
 position:relative;
 overflow:hidden;
 padding:46px 0 34px;
 background:linear-gradient(180deg,#eef5ff 0%,#f7faff 70%,var(--bg) 100%);
 border-bottom:1px solid rgba(226,233,244,.7);
}
.article-hero::before{
 content:"";
 position:absolute;
 width:520px;
 height:520px;
 right:-170px;
 top:-250px;
 border-radius:50%;
 background:radial-gradient(circle at 30% 30%,rgba(61,140,232,.20),rgba(61,140,232,0) 68%);
 pointer-events:none;
}
.article-hero::after{
 content:"";
 position:absolute;
 width:420px;
 height:420px;
 left:-220px;
 bottom:-260px;
 border-radius:50%;
 background:radial-gradient(circle at 60% 40%,rgba(29,95,196,.14),rgba(29,95,196,0) 70%);
 pointer-events:none;
}
.article-hero-inner{position:relative;z-index:1;}
.breadcrumb-line{
 display:flex;
 flex-wrap:wrap;
 align-items:center;
 gap:8px;
 font-size:13.5px;
 color:var(--muted);
 margin-bottom:20px;
}
.breadcrumb-line a{color:var(--brand-dark);font-weight:600;}
.breadcrumb-line a:hover{color:var(--brand);}
.breadcrumb-line span{color:#9aa8bc;}
.article-head-grid{
 display:grid;
 grid-template-columns:minmax(0,1fr) 260px;
 gap:36px;
 align-items:start;
}
.article-badge{
 display:inline-flex;
 align-items:center;
 gap:8px;
 padding:6px 14px;
 border-radius:999px;
 background:#fff;
 border:1px solid var(--line-strong);
 box-shadow:var(--shadow-sm);
 font-size:13px;
 color:var(--brand-dark);
 font-weight:600;
 margin-bottom:16px;
}
.article-badge .dot{
 width:7px;
 height:7px;
 border-radius:50%;
 background:#2bb673;
 box-shadow:0 0 0 4px rgba(43,182,115,.16);
}
.article-title{
 font-size:40px;
 line-height:1.28;
 font-weight:800;
 letter-spacing:-.02em;
 color:var(--ink);
 margin-bottom:16px;
 overflow-wrap:anywhere;
}
.article-lead{
 font-size:16px;
 line-height:1.85;
 color:var(--muted);
 margin-bottom:22px;
 max-width:780px;
 overflow-wrap:anywhere;
}
.article-meta{
 display:flex;
 flex-wrap:wrap;
 align-items:center;
 gap:8px 18px;
 padding-top:16px;
 border-top:1px solid var(--line);
 font-size:13.5px;
 color:var(--muted);
}
.meta-item{display:inline-flex;align-items:center;gap:7px;}
.meta-item svg{width:15px;height:15px;color:var(--brand);flex:0 0 15px;}
.article-side-summary{
 background:#fff;
 border:1px solid var(--line);
 border-radius:var(--radius-lg);
 box-shadow:var(--shadow);
 padding:22px;
}
.article-side-summary h2{font-size:15px;margin-bottom:14px;color:var(--ink);}
.summary-list{list-style:none;margin:0;padding:0;display:grid;gap:13px;}
.summary-list li{padding-bottom:13px;border-bottom:1px dashed var(--line);font-size:13.5px;color:var(--muted);}
.summary-list li:last-child{padding-bottom:0;border-bottom:0;}
.summary-list strong{display:block;font-size:14px;color:var(--ink-2);margin-bottom:2px;}
/* cover */
.cover-section{padding:28px 0 0;}
.cover-figure{margin:0;}
.cover-frame{
 position:relative;
 overflow:hidden;
 border-radius:var(--radius-lg);
 border:1px solid var(--line);
 box-shadow:var(--shadow-lg);
 background:#dbe7f7;
}
.cover-frame img{
 width:100%;
 height:430px;
 object-fit:cover;
 transition:transform .6s ease;
}
.cover-figure:hover .cover-frame img{transform:scale(1.025);}
.cover-caption{
 display:flex;
 justify-content:space-between;
 gap:16px;
 padding:12px 4px 0;
 font-size:12.5px;
 color:var(--muted);
 line-height:1.6;
}
/* quote */
.quote-section{padding:38px 0 0;}
.pull-quote{
 position:relative;
 margin:0;
 padding:28px 34px 28px 58px;
 background:#fff;
 border:1px solid var(--line);
 border-radius:var(--radius-lg);
 box-shadow:var(--shadow-sm);
 color:var(--ink-2);
 font-size:19px;
 line-height:1.8;
 font-weight:600;
}
.pull-quote::before{
 content:"“";
 position:absolute;
 left:22px;
 top:15px;
 font-size:46px;
 line-height:1;
 color:var(--brand-2);
 font-family:Georgia,serif;
}
.pull-quote cite{
 display:block;
 margin-top:10px;
 font-size:13px;
 font-style:normal;
 font-weight:400;
 color:var(--muted);
}
/* layout */
.main-content{padding:42px 0 64px;}
.article-layout{
 display:grid;
 grid-template-columns:minmax(0,1fr) 330px;
 gap:34px;
 align-items:start;
}
.article-main{min-width:0;}
.article-sidebar{position:sticky;top:88px;display:grid;gap:18px;}
.side-card{
 background:#fff;
 border:1px solid var(--line);
 border-radius:var(--radius);
 box-shadow:var(--shadow-sm);
 padding:20px;
}
.side-card h2,.side-card h3{
 font-size:15.5px;
 margin-bottom:12px;
 color:var(--ink);
}
.side-card p{font-size:13.5px;color:var(--muted);line-height:1.75;margin-bottom:0;}
.side-list{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.side-list li{position:relative;padding-left:16px;font-size:13.5px;color:var(--muted);line-height:1.7;}
.side-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand-2);}
.side-card .btn{width:100%;margin-top:14px;}
.side-note{
 background:linear-gradient(135deg,#123f85,#1d5fc4);
 color:#fff;
 border:0;
}
.side-note h2,.side-note h3{color:#fff;}
.side-note p{color:rgba(255,255,255,.78);}
.side-note .side-list li{color:rgba(255,255,255,.82);}
.side-note .side-list li::before{background:#8bc0ff;}
/* content section */
.content-shell{
 background:#fff;
 border:1px solid var(--line);
 border-radius:var(--radius-lg);
 box-shadow:var(--shadow-sm);
 padding:30px;
}
.content-shell > h1:first-child,
.content-shell > h2:first-child{margin-top:0;}
.section-tag{
 display:inline-flex;
 align-items:center;
 gap:8px;
 font-size:12.5px;
 color:var(--brand);
 font-weight:700;
 letter-spacing:.06em;
 margin-bottom:8px;
}
.section-tag::before{content:"";width:18px;height:2px;border-radius:2px;background:var(--brand);}
.article-content{
 font-size:15.5px;
 line-height:1.9;
 color:var(--ink-2);
 overflow-wrap:anywhere;
}
.article-content h1,.article-content h2,.article-content h3,.article-content h4{
 color:var(--ink);
 line-height:1.45;
 margin:1.55em 0 .65em;
 font-weight:700;
}
.article-content h1{font-size:26px;}
.article-content h2{font-size:22px;}
.article-content h3{font-size:18px;}
.article-content p{margin-bottom:1.1em;}
.article-content a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-content ul,.article-content ol{margin:0 0 1.15em;padding-left:1.35em;}
.article-content li{margin-bottom:.45em;}
.article-content blockquote{
 margin:1.5em 0;
 padding:18px 22px;
 border-left:4px solid var(--brand-2);
 background:var(--bg-tint);
 border-radius:0 var(--radius-sm) var(--radius-sm) 0;
 color:var(--ink-2);
}
.article-content img{border-radius:var(--radius);margin:1.2em 0;box-shadow:var(--shadow-sm);}
.article-content table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:14px;}
.article-content th,.article-content td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.article-content th{background:var(--bg-tint);color:var(--ink);}
.article-content code,.article-content pre{background:#f1f5fb;border:1px solid var(--line);border-radius:8px;}
.article-content code{padding:2px 6px;font-size:.92em;}
.article-content pre{padding:16px;overflow-x:auto;line-height:1.65;}
/* sections */
.section{padding:58px 0;}
.section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{
 display:flex;
 align-items:flex-end;
 justify-content:space-between;
 gap:26px;
 margin-bottom:26px;
}
.section-head-left{max-width:700px;}
.eyebrow{
 display:block;
 font-size:12.5px;
 color:var(--brand);
 font-weight:700;
 letter-spacing:.08em;
 margin-bottom:8px;
}
.section-title{
 font-size:28px;
 line-height:1.4;
 font-weight:800;
 letter-spacing:-.015em;
 margin-bottom:8px;
 color:var(--ink);
}
.section-desc{
 margin:0;
 color:var(--muted);
 font-size:14.5px;
 line-height:1.8;
}
.section-link{
 color:var(--brand);
 font-size:14px;
 font-weight:600;
 white-space:nowrap;
 border-bottom:1px solid rgba(29,95,196,.25);
 padding-bottom:2px;
}
.section-link:hover{color:var(--brand-dark);border-color:var(--brand-dark);}
/* cards */
.feature-grid{
 display:grid;
 grid-template-columns:repeat(4,minmax(0,1fr));
 gap:18px;
}
.info-card{
 background:#fff;
 border:1px solid var(--line);
 border-radius:var(--radius);
 box-shadow:var(--shadow-sm);
 padding:22px;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
 height:100%;
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#bcd4f5;}
.icon-box{
 width:40px;
 height:40px;
 border-radius:11px;
 display:grid;
 place-items:center;
 background:var(--brand-soft);
 color:var(--brand);
 margin-bottom:16px;
}
.icon-box svg{width:21px;height:21px;}
.info-card h3{font-size:16px;line-height:1.5;margin-bottom:8px;color:var(--ink);}
.info-card p{font-size:13.5px;line-height:1.75;color:var(--muted);margin-bottom:14px;}
.info-card .chip{background:#f1f6ff;color:var(--brand-dark);}
/* table */
.table-panel{
 background:#fff;
 border:1px solid var(--line);
 border-radius:var(--radius-lg);
 box-shadow:var(--shadow-sm);
 padding:24px;
 overflow:hidden;
}
.table-wrap{overflow-x:auto;border-radius:var(--radius-sm);}
.rule-table{
 width:100%;
 border-collapse:separate;
 border-spacing:0;
 min-width:680px;
 font-size:14px;
}
.rule-table th{
 background:var(--bg-tint);
 color:var(--ink);
 font-weight:700;
 text-align:left;
 padding:13px 14px;
 border-bottom:1px solid var(--line-strong);
}
.rule-table td{
 padding:13px 14px;
 color:var(--ink-2);
 border-bottom:1px solid var(--line);
 vertical-align:top;
 line-height:1.7;
}
.rule-table tr:last-child td{border-bottom:0;}
.rule-table tbody tr{transition:background .2s;}
.rule-table tbody tr:hover{background:#f8fbff;}
.rule-table .code{
 font-weight:700;
 color:var(--brand-dark);
 white-space:nowrap;
}
.result-pill{
 display:inline-block;
 padding:3px 9px;
 border-radius:999px;
 background:#eaf7ef;
 color:#18794e;
 font-size:12.5px;
 font-weight:600;
 white-space:nowrap;
}
.result-pill.warn{background:#fff5e8;color:#9a5a12;}
/* steps */
.steps-grid{
 display:grid;
 grid-template-columns:repeat(4,minmax(0,1fr));
 gap:16px;
 counter-reset:step;
}
.step-card{
 position:relative;
 background:#fff;
 border:1px solid var(--line);
 border-radius:var(--radius);
 box-shadow:var(--shadow-sm);
 padding:24px 20px 20px;
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#bcd4f5;}
.step-num{
 display:grid;
 place-items:center;
 width:34px;
 height:34px;
 border-radius:10px;
 background:var(--brand);
 color:#fff;
 font-size:14px;
 font-weight:700;
 margin-bottom:14px;
 box-shadow:0 7px 15px rgba(29,95,196,.25);
}
.step-card h3{font-size:15.5px;margin-bottom:7px;}
.step-card p{font-size:13.5px;color:var(--muted);line-height:1.7;margin-bottom:0;}
/* faq */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
.faq-item{
 background:#fff;
 border:1px solid var(--line);
 border-radius:var(--radius);
 box-shadow:var(--shadow-sm);
 padding:0;
 overflow:hidden;
}
.faq-item summary{
 list-style:none;
 cursor:pointer;
 padding:18px 46px 18px 20px;
 position:relative;
 font-size:15px;
 font-weight:700;
 color:var(--ink);
 line-height:1.55;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
 content:"+";
 position:absolute;
 right:18px;
 top:50%;
 transform:translateY(-50%);
 width:24px;
 height:24px;
 line-height:22px;
 text-align:center;
 border-radius:50%;
 background:var(--brand-soft);
 color:var(--brand);
 font-size:18px;
 font-weight:600;
 transition:transform .2s,background .2s;
}
.faq-item[open] summary::after{content:"−";background:var(--brand);color:#fff;}
.faq-item .faq-answer{
 padding:0 20px 20px;
 color:var(--muted);
 font-size:14px;
 line-height:1.85;
 border-top:1px dashed var(--line);
 padding-top:15px;
 margin:0 0 0;
}
/* cta */
.cta-band{
 background:linear-gradient(135deg,#123f85 0%,#1d5fc4 64%,#3d8ce8 100%);
 color:#fff;
 border-radius:var(--radius-lg);
 padding:38px 40px;
 box-shadow:var(--shadow-lg);
 display:flex;
 align-items:center;
 justify-content:space-between;
 gap:28px;
 position:relative;
 overflow:hidden;
}
.cta-band::after{
 content:"";
 position:absolute;
 width:260px;
 height:260px;
 right:-80px;
 top:-100px;
 border-radius:50%;
 background:rgba(255,255,255,.10);
 pointer-events:none;
}
.cta-band h2{
 font-size:27px;
 line-height:1.45;
 margin-bottom:8px;
 color:#fff;
}
.cta-band p{
 margin:0;
 color:rgba(255,255,255,.78);
 font-size:14.5px;
 line-height:1.75;
 max-width:670px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;flex:0 0 auto;}
/* footer */
.site-footer{
 background:#fff;
 border-top:1px solid var(--line);
 padding:50px 0 22px;
 color:var(--ink-2);
}
.footer-grid{
 display:grid;
 grid-template-columns:1.35fr .75fr 1fr;
 gap:42px;
 padding-bottom:34px;
}
.footer-brand{
 display:flex;
 align-items:center;
 gap:10px;
 font-size:16px;
 font-weight:700;
 margin-bottom:12px;
 color:var(--ink);
}
.footer-desc{font-size:13.5px;color:var(--muted);line-height:1.85;max-width:430px;margin:0;}
.footer-col h3{font-size:14.5px;margin-bottom:13px;color:var(--ink);}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;}
.footer-col li{font-size:13.5px;color:var(--muted);line-height:1.75;}
.footer-col a{color:var(--muted);transition:color .2s;}
.footer-col a:hover{color:var(--brand);}
.footer-col p{font-size:13.5px;color:var(--muted);line-height:1.85;margin:0;}
.footer-bottom{
 border-top:1px solid var(--line);
 padding-top:18px;
 display:flex;
 align-items:center;
 justify-content:space-between;
 gap:14px;
 font-size:12.5px;
 color:#8592a6;
}
/* article no result */
.no-article{
 padding:34px;
 border:1px dashed var(--line-strong);
 border-radius:var(--radius);
 background:#fbfdff;
 text-align:center;
}
.no-article h2{font-size:22px;margin-bottom:8px;}
.no-article p{color:var(--muted);margin-bottom:18px;}
/* responsive */
@media (max-width:1100px){
 .article-head-grid{grid-template-columns:minmax(0,1fr) 230px;}
 .article-layout{grid-template-columns:minmax(0,1fr) 300px;}
 .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
 .steps-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:992px){
 .header-inner{min-height:64px;}
 .nav-toggle{display:flex;}
 .nav-wrap{
  display:none;
  position:absolute;
  top:calc(100% + 1px);
  left:0;
  right:0;
  flex-direction:column;
  align-items:stretch;
  gap:12px;
  background:#fff;
  border:1px solid var(--line);
  border-top:0;
  border-radius:0 0 16px 16px;
  box-shadow:0 18px 34px rgba(16,40,80,.14);
  padding:14px 16px 18px;
  z-index:210;
 }
 .nav-wrap.open{display:flex;}
 .nav-list{flex-direction:column;align-items:stretch;gap:4px;width:100%;}
 .nav-link{display:block;width:100%;padding:11px 12px;}
 .nav-cta{text-align:center;width:100%;padding:11px 16px;}
 .article-head-grid{grid-template-columns:1fr;}
 .article-side-summary{display:none;}
 .article-layout{grid-template-columns:1fr;}
 .article-sidebar{position:static;grid-template-columns:repeat(2,minmax(0,1fr));}
 .article-title{font-size:34px;}
 .cover-frame img{height:350px;}
 .section-head{flex-direction:column;align-items:flex-start;gap:10px;}
 .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
 .footer-grid > div:first-child{grid-column:1 / -1;}
}
@media (max-width:768px){
 .article-hero{padding:32px 0 26px;}
 .article-title{font-size:30px;}
 .article-lead{font-size:15px;}
 .cover-frame img{height:280px;}
 .cover-caption{flex-direction:column;gap:4px;}
 .pull-quote{font-size:16.5px;padding:24px 24px 24px 46px;}
 .pull-quote::before{left:16px;top:12px;font-size:38px;}
 .content-shell{padding:22px;}
 .section{padding:44px 0;}
 .section-title{font-size:24px;}
 .article-sidebar{grid-template-columns:1fr;}
 .faq-grid{grid-template-columns:1fr;}
 .feature-grid{grid-template-columns:1fr;}
 .steps-grid{grid-template-columns:1fr;}
 .cta-band{padding:28px 22px;border-radius:var(--radius);}
 .cta-band h2{font-size:23px;}
 .cta-actions{width:100%;}
 .cta-actions .btn{flex:1 1 150px;}
 .footer-grid{grid-template-columns:1fr;gap:26px;}
 .footer-bottom{flex-direction:column;align-items:flex-start;gap:6px;}
}
@media (max-width:520px){
 .container{padding:0 16px;}
 .brand{font-size:15.5px;}
 .brand-mark{width:32px;height:32px;flex-basis:32px;}
 .article-title{font-size:26px;}
 .section-title{font-size:22px;}
 .article-meta{font-size:12.5px;gap:7px 13px;}
 .cover-frame img{height:220px;}
 .content-shell{padding:18px;}
 .table-panel{padding:16px;}
 .info-card{padding:18px;}
 .side-card{padding:17px;}
 .btn{padding:11px 18px;}
 .cta-band h2{font-size:21px;}
 .pull-quote{font-size:15.5px;padding:20px 18px 20px 40px;}
 .pull-quote::before{left:12px;}
}

/* roulang page: category3 */
:root{
 --brand:#1d5fc4;
 --brand-2:#3d8ce8;
 --brand-dark:#123f85;
 --brand-soft:#e9f1ff;
 --ink:#0f1a2b;
 --ink-2:#33415c;
 --muted:#65758e;
 --line:#e2e9f4;
 --line-strong:#cfdcee;
 --bg:#f5f8fd;
 --bg-tint:#eef4fc;
 --card:#ffffff;
 --gold:#e6b96a;
 --gold-soft:rgba(230,185,106,.16);
 --radius-lg:18px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 2px 8px rgba(16,40,80,.06);
 --shadow:0 10px 28px rgba(16,40,80,.09);
 --shadow-lg:0 20px 44px rgba(16,40,80,.14);
 --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 14px;}
h1,h2,h3,h4{margin:0;line-height:1.35;}
button{font-family:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:200;
 background:rgba(255,255,255,.95);
 backdrop-filter:blur(10px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(16,40,80,.10);}
.header-inner{
 display:flex;align-items:center;justify-content:space-between;
 min-height:64px;gap:18px;position:relative;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--ink);}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:0 0 34px;
 background:linear-gradient(135deg,var(--brand),var(--brand-2));
 color:#fff;display:grid;place-items:center;font-size:16px;font-weight:700;
 box-shadow:0 6px 14px rgba(29,95,196,.28);
}
.brand-text{white-space:nowrap;}
.nav-wrap{display:flex;align-items:center;gap:22px;}
.nav-list{display:flex;align-items:center;gap:4px;}
.nav-link{
 display:inline-block;padding:8px 12px;border-radius:9px;
 font-size:15px;color:var(--ink-2);transition:background .2s,color .2s;
 white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:#eef4ff;}
.nav-link.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-cta{
 display:inline-block;padding:9px 18px;border-radius:9px;
 background:var(--brand);color:#fff;font-size:14.5px;font-weight:600;
 transition:background .2s,transform .2s,box-shadow .2s;
 box-shadow:0 8px 18px rgba(29,95,196,.25);white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 22px rgba(29,95,196,.3);color:#fff;}
.nav-toggle{
 display:none;width:44px;height:44px;border:1px solid var(--line);
 background:#fff;border-radius:11px;cursor:pointer;
 flex-direction:column;justify-content:center;align-items:center;gap:5px;
 transition:border-color .2s,box-shadow .2s;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s,opacity .22s;}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
/* ---------- buttons & tags ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:12px 24px;border-radius:9px;font-size:15px;font-weight:600;
 border:1px solid transparent;cursor:pointer;
 transition:background .2s,color .2s,transform .2s,box-shadow .2s,border-color .2s;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 22px rgba(29,95,196,.26);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(29,95,196,.32);color:#fff;}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--line-strong);box-shadow:var(--shadow-sm);}
.btn-outline:hover{border-color:var(--brand);background:#f4f8ff;transform:translateY(-2px);color:var(--brand);}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-gold{background:linear-gradient(135deg,#e6b96a,#d7a34c);color:#241a08;box-shadow:0 12px 26px rgba(230,185,106,.32);}
.btn-gold:hover{background:linear-gradient(135deg,#f0c67c,#dfae57);color:#241a08;transform:translateY(-2px);}
.btn-ghost-light{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.28);}
.btn-ghost-light:hover{background:rgba(255,255,255,.16);color:#fff;transform:translateY(-2px);}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
 display:inline-block;padding:6px 14px;border-radius:999px;
 background:#fff;border:1px solid var(--line-strong);
 font-size:13.5px;color:var(--ink-2);box-shadow:var(--shadow-sm);
}
.chip{
 display:inline-block;padding:4px 11px;border-radius:999px;
 background:var(--brand-soft);color:var(--brand-dark);
 font-size:12.5px;font-weight:600;letter-spacing:.01em;
}
.chip-fan{background:#fff4e2;color:#8a5c11;}
/* ---------- hero ---------- */
.hero-dark{
 position:relative;overflow:hidden;color:#fff;
 padding:56px 0 62px;
 background:linear-gradient(158deg,#0b1626 0%,#0f2543 48%,#123f85 100%);
}
.hero-bg{
 position:absolute;inset:0;width:100%;height:100%;
 object-fit:cover;opacity:.16;filter:saturate(.7);
 pointer-events:none;
}
.hero-dark::after{
 content:"";position:absolute;inset:0;pointer-events:none;
 background:radial-gradient(900px 420px at 82% 8%,rgba(230,185,106,.18),rgba(230,185,106,0) 66%);
}
.hero-grid{
 position:relative;z-index:2;
 display:grid;grid-template-columns:1.08fr .92fr;gap:46px;align-items:center;
}
.hero-eyebrow{
 display:inline-flex;align-items:center;gap:10px;
 padding:6px 14px 6px 8px;border-radius:999px;
 background:rgba(255,255,255,.08);border:1px solid rgba(230,185,106,.45);
 font-size:13px;color:#f3d49b;font-weight:600;margin-bottom:20px;
}
.hero-eyebrow .level{
 display:inline-grid;place-items:center;width:26px;height:26px;border-radius:8px;
 background:linear-gradient(135deg,#e6b96a,#c8923c);color:#231808;
 font-size:12.5px;font-weight:800;
}
.hero-dark h1{
 font-size:40px;line-height:1.24;font-weight:800;letter-spacing:-.02em;margin-bottom:16px;
}
.hero-dark h1 em{font-style:normal;color:var(--gold);}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(233,240,251,.82);max-width:580px;margin-bottom:22px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.hero-tags .tag{
 background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.22);
 color:#e8eefb;box-shadow:none;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
/* hero panel */
.panel{
 background:rgba(255,255,255,.06);
 border:1px solid rgba(255,255,255,.16);
 border-radius:var(--radius-lg);
 padding:24px;backdrop-filter:blur(6px);
 box-shadow:0 24px 48px rgba(3,12,26,.35);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.panel-head h2{font-size:16px;font-weight:700;letter-spacing:.01em;}
.panel-head span{font-size:12px;color:#f3d49b;border:1px solid rgba(230,185,106,.45);padding:3px 10px;border-radius:999px;}
.panel-row{
 display:flex;align-items:center;justify-content:space-between;gap:12px;
 padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.14);font-size:14px;
}
.panel-row:last-of-type{border-bottom:0;}
.panel-row .k{color:rgba(233,240,251,.72);}
.panel-row .v{font-weight:700;color:#fff;}
.panel-row .v.gold{color:var(--gold);}
.panel-total{
 margin-top:14px;padding:14px 16px;border-radius:12px;
 background:rgba(230,185,106,.14);border:1px solid rgba(230,185,106,.38);
 display:flex;align-items:baseline;justify-content:space-between;
}
.panel-total b{font-size:24px;color:#fff;letter-spacing:.02em;}
.panel-total span{font-size:12.5px;color:rgba(243,212,155,.9);}
/* ---------- sections ---------- */
.section{padding:66px 0;}
.section-tint{background:var(--bg-tint);}
.section-white{background:#fff;}
.section-head{max-width:760px;margin-bottom:34px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-kicker{
 display:inline-flex;align-items:center;gap:8px;
 font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.04em;
 margin-bottom:10px;
}
.section-kicker::before{
 content:"";width:22px;height:2px;border-radius:2px;background:var(--brand-2);
}
.section-title{font-size:28px;font-weight:800;letter-spacing:-.01em;margin-bottom:12px;}
.section-sub{font-size:15px;color:var(--muted);line-height:1.85;margin:0;}
/* ---------- grids ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
/* ---------- cards ---------- */
.tile{
 background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
 padding:24px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
 height:100%;
}
.tile:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand-2);}
.tile h3{font-size:16.5px;font-weight:700;margin-bottom:10px;}
.tile p{font-size:14.2px;line-height:1.78;color:var(--muted);margin:0;}
.ico{
 width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
 background:var(--brand-soft);color:var(--brand);margin-bottom:16px;
}
.ico svg{width:22px;height:22px;}
.ico.gold{background:#fdf3e0;color:#a9761c;}
.ico.green{background:#e8f7ef;color:#178a52;}
.ico.purple{background:#f0edfd;color:#5b45c6;}
/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step;}
.step{
 position:relative;background:#fff;border:1px solid var(--line);
 border-radius:var(--radius);padding:26px 22px 22px;
 box-shadow:var(--shadow-sm);
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand-2);}
.step-num{
 font-size:13px;font-weight:800;letter-spacing:.06em;color:var(--brand);
 background:var(--brand-soft);border-radius:999px;padding:3px 11px;display:inline-block;margin-bottom:14px;
}
.step h3{font-size:16px;margin-bottom:9px;}
.step p{font-size:14px;color:var(--muted);line-height:1.78;margin:0;}
/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.split-figure{position:relative;}
.split-figure img{
 width:100%;aspect-ratio:4/3;object-fit:cover;
 border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);
 border:1px solid var(--line);
}
.split-figure figcaption{
 margin-top:14px;font-size:13px;color:var(--muted);
}
.check-list li{
 display:flex;align-items:flex-start;gap:12px;
 padding:14px 0;border-bottom:1px solid var(--line);
}
.check-list li:last-child{border-bottom:0;}
.check-list .mark{
 flex:0 0 22px;width:22px;height:22px;border-radius:7px;margin-top:3px;
 background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;
 font-size:12px;font-weight:800;
}
.check-list .body{flex:1;}
.check-list b{font-size:15px;font-weight:700;display:block;margin-bottom:3px;}
.check-list span.desc{font-size:13.6px;color:var(--muted);line-height:1.7;display:block;}
.check-list .fan{flex:0 0 auto;margin-top:3px;}
/* ---------- stats ---------- */
.stats{
 display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:32px;box-shadow:var(--shadow-sm);
}
.stat{text-align:center;padding:6px 10px;}
.stat-num{
 font-size:34px;font-weight:800;letter-spacing:-.02em;color:var(--brand);
 line-height:1.2;margin-bottom:6px;
}
.stat-num small{font-size:15px;font-weight:700;margin-left:2px;}
.stat-label{font-size:13.5px;color:var(--muted);}
/* ---------- quotes ---------- */
.quote{
 background:#fff;border:1px solid var(--line);border-left:3px solid var(--brand);
 border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);
 transition:transform .2s,box-shadow .2s;
 height:100%;
}
.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.quote p{font-size:14.5px;line-height:1.85;color:var(--ink-2);margin-bottom:16px;}
.quote-meta{display:flex;align-items:center;gap:10px;}
.avatar{
 width:36px;height:36px;border-radius:50%;flex:0 0 36px;
 background:linear-gradient(135deg,var(--brand-2),var(--brand));
 color:#fff;display:grid;place-items:center;font-size:14px;font-weight:700;
}
.quote-meta b{font-size:14px;display:block;}
.quote-meta span{font-size:12.5px;color:var(--muted);}
/* ---------- audience ---------- */
.audience{
 display:flex;align-items:center;gap:16px;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:20px 22px;box-shadow:var(--shadow-sm);
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.audience:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--brand-2);}
.audience .ico{margin-bottom:0;flex:0 0 44px;}
.audience h3{font-size:15.5px;margin-bottom:4px;}
.audience p{font-size:13.6px;color:var(--muted);margin:0;line-height:1.7;}
/* ---------- post list ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.post-item{
 display:flex;flex-direction:column;gap:10px;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s,box-shadow .2s,border-color .2s;
 height:100%;
}
.post-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand-2);}
.post-item .chip{align-self:flex-start;}
.post-item h3{font-size:16px;line-height:1.55;margin:0;}
.post-item p{font-size:13.8px;color:var(--muted);line-height:1.75;margin:0;}
.post-date{font-size:12.5px;color:var(--muted);margin-top:auto;padding-top:6px;}
.post-empty{
 background:#fff;border:1px dashed var(--line-strong);border-radius:var(--radius);
 padding:26px;text-align:center;color:var(--muted);font-size:14.5px;
}
/* ---------- faq ---------- */
.faq-item{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
 box-shadow:var(--shadow-sm);margin-bottom:12px;overflow:hidden;
}
.faq-item summary{
 list-style:none;cursor:pointer;padding:18px 22px;
 font-size:15.5px;font-weight:700;color:var(--ink);
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 transition:background .2s;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
 content:"+";font-size:20px;font-weight:600;color:var(--brand);
 transition:transform .22s ease;line-height:1;
}
.faq-item[open] summary::after{content:"−";}
.faq-item summary:hover{background:#f6faff;}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;}
.faq-body{padding:0 22px 20px;font-size:14.3px;color:var(--muted);line-height:1.85;}
/* ---------- cta band ---------- */
.cta-band{
 position:relative;overflow:hidden;color:#fff;
 background:linear-gradient(135deg,#0f2543,#1d5fc4 92%);
 border-radius:var(--radius-lg);
 padding:44px 46px;
 display:flex;align-items:center;justify-content:space-between;gap:32px;
 box-shadow:var(--shadow-lg);
}
.cta-band::before{
 content:"";position:absolute;right:-90px;top:-120px;width:320px;height:320px;border-radius:50%;
 background:radial-gradient(circle,rgba(230,185,106,.28),rgba(230,185,106,0) 70%);
}
.cta-band h2{font-size:26px;font-weight:800;margin-bottom:10px;position:relative;}
.cta-band p{font-size:14.5px;color:rgba(233,240,251,.82);margin:0;max-width:620px;position:relative;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;}
/* ---------- footer ---------- */
.site-footer{background:#0b1626;color:#b9c7dc;padding:56px 0 0;margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr;gap:40px;padding-bottom:38px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;}
.footer-desc{font-size:14px;line-height:1.85;color:#8fa2bd;margin:0;max-width:380px;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:14px;font-weight:700;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a{font-size:14px;color:#8fa2bd;transition:color .2s;}
.footer-col ul li a:hover{color:#fff;}
.footer-col p{font-size:13.5px;line-height:1.85;color:#8fa2bd;margin:0;}
.footer-bottom{
 border-top:1px solid rgba(255,255,255,.1);
 padding:20px 0 26px;display:flex;align-items:center;justify-content:space-between;
 gap:16px;flex-wrap:wrap;font-size:13px;color:#7e91ab;
}
/* ---------- responsive ---------- */
@media (max-width:1024px){
 .hero-grid{grid-template-columns:1fr;gap:34px;}
 .hero-dark h1{font-size:34px;}
 .grid-4{grid-template-columns:repeat(2,1fr);}
 .steps{grid-template-columns:repeat(2,1fr);}
 .post-grid{grid-template-columns:repeat(2,1fr);}
 .split{grid-template-columns:1fr;gap:30px;}
 .stats{grid-template-columns:repeat(2,1fr);}
 .cta-band{flex-direction:column;align-items:flex-start;padding:36px 30px;}
}
@media (max-width:860px){
 .nav-toggle{display:flex;}
 .nav-wrap{
  position:absolute;top:calc(100% + 10px);right:0;left:0;
  flex-direction:column;align-items:stretch;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;box-shadow:var(--shadow-lg);
  display:none;
 }
 .nav-wrap.open{display:flex;}
 .nav-list{flex-direction:column;align-items:stretch;gap:2px;}
 .nav-link{padding:12px 14px;font-size:15px;}
 .nav-cta{text-align:center;padding:12px 18px;}
 .grid-3{grid-template-columns:repeat(2,1fr);}
 .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:640px){
 .section{padding:48px 0;}
 .hero-dark{padding:42px 0 48px;}
 .hero-dark h1{font-size:29px;}
 .hero-lead{font-size:14.8px;}
 .section-title{font-size:23px;}
 .grid-4,.grid-3,.grid-2,.steps,.post-grid,.stats{grid-template-columns:1fr;}
 .stats{padding:22px;gap:14px;}
 .stat-num{font-size:29px;}
 .cta-band{padding:30px 22px;}
 .cta-band h2{font-size:22px;}
 .btn{width:100%;}
 .hero-actions .btn,.cta-actions .btn{width:100%;}
 .footer-grid{grid-template-columns:1fr;}
 .footer-bottom{flex-direction:column;align-items:flex-start;}
 .panel{padding:20px;}
}
@media (max-width:380px){
 .brand-text{font-size:15px;}
 .hero-dark h1{font-size:26px;}
}

/* roulang page: category2 */
:root{
 --brand:#1d5fc4;
 --brand-2:#3d8ce8;
 --brand-dark:#123f85;
 --brand-soft:#e9f1ff;
 --ink:#0f1a2b;
 --ink-2:#33415c;
 --muted:#65758e;
 --line:#e2e9f4;
 --line-strong:#cfdcee;
 --bg:#f5f8fd;
 --bg-tint:#eef4fc;
 --card:#ffffff;
 --radius-lg:18px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 2px 8px rgba(16,40,80,.06);
 --shadow:0 10px 28px rgba(16,40,80,.09);
 --shadow-lg:0 20px 44px rgba(16,40,80,.14);
 --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
 margin:0;
 font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;
 line-height:1.75;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:200;
 background:rgba(255,255,255,.95);
 backdrop-filter:blur(10px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(16,40,80,.10);}
.header-inner{
 display:flex;align-items:center;justify-content:space-between;
 min-height:64px;gap:18px;position:relative;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--ink);}
.brand-mark{
 width:34px;height:34px;border-radius:10px;flex:0 0 34px;
 background:linear-gradient(135deg,var(--brand),var(--brand-2));
 color:#fff;display:grid;place-items:center;font-size:16px;font-weight:700;
 box-shadow:0 6px 14px rgba(29,95,196,.28);
}
.brand-text{white-space:nowrap;}
.nav-wrap{display:flex;align-items:center;gap:22px;}
.nav-list{display:flex;align-items:center;gap:4px;}
.nav-link{
 display:inline-block;padding:8px 12px;border-radius:9px;
 font-size:15px;color:var(--ink-2);transition:background .2s,color .2s;
 white-space:nowrap;
}
.nav-link:hover{color:var(--brand);background:#eef4ff;}
.nav-link.active{color:var(--brand);background:var(--brand-soft);font-weight:600;}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-cta{
 display:inline-block;padding:9px 18px;border-radius:9px;
 background:var(--brand);color:#fff;font-size:14.5px;font-weight:600;
 transition:background .2s,transform .2s,box-shadow .2s;
 box-shadow:0 8px 18px rgba(29,95,196,.25);white-space:nowrap;
}
.nav-cta:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 22px rgba(29,95,196,.3);color:#fff;}
.nav-toggle{
 display:none;width:44px;height:44px;border:1px solid var(--line);
 background:#fff;border-radius:11px;cursor:pointer;
 flex-direction:column;justify-content:center;align-items:center;gap:5px;
 transition:border-color .2s,box-shadow .2s;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s,opacity .22s;}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
/* ---------- buttons & tags ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 padding:12px 24px;border-radius:9px;font-size:15px;font-weight:600;
 border:1px solid transparent;cursor:pointer;
 transition:background .2s,color .2s,transform .2s,box-shadow .2s,border-color .2s;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 22px rgba(29,95,196,.26);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 14px 28px rgba(29,95,196,.32);color:#fff;}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--line-strong);box-shadow:var(--shadow-sm);}
.btn-outline:hover{border-color:var(--brand);background:#f4f8ff;transform:translateY(-2px);color:var(--brand);}
.btn-light{background:#fff;color:var(--brand-dark);box-shadow:0 10px 22px rgba(6,22,50,.18);}
.btn-light:hover{background:#eef4ff;transform:translateY(-2px);color:var(--brand-dark);}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.btn-sm{padding:9px 18px;font-size:14px;}
.chip{
 display:inline-block;padding:4px 11px;border-radius:999px;
 background:var(--brand-soft);color:var(--brand-dark);
 font-size:12.5px;font-weight:600;letter-spacing:.01em;
}
.chip-line{background:#fff;border:1px solid var(--line-strong);color:var(--ink-2);}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
 display:inline-block;padding:6px 14px;border-radius:999px;
 background:#fff;border:1px solid var(--line-strong);
 font-size:13.5px;color:var(--ink-2);box-shadow:var(--shadow-sm);
}
/* ---------- hero ---------- */
.page-hero{
 position:relative;overflow:hidden;
 padding:56px 0 58px;
 background:linear-gradient(180deg,#eef5ff 0%,#f7faff 64%,var(--bg) 100%);
}
.page-hero::before,.page-hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none;}
.page-hero::before{
 width:520px;height:520px;right:-170px;top:-230px;
 background:radial-gradient(circle at 30% 30%,rgba(61,140,232,.20),rgba(61,140,232,0) 68%);
}
.page-hero::after{
 width:420px;height:420px;left:-190px;bottom:-250px;
 background:radial-gradient(circle at 60% 40%,rgba(29,95,196,.14),rgba(29,95,196,0) 70%);
}
.hero-grid{
 position:relative;display:grid;grid-template-columns:1.06fr .94fr;
 gap:46px;align-items:start;
}
.hero-badge{
 display:inline-flex;align-items:center;gap:8px;
 padding:6px 14px;border-radius:999px;background:#fff;
 border:1px solid var(--line-strong);box-shadow:var(--shadow-sm);
 font-size:13.5px;color:var(--brand-dark);font-weight:600;margin-bottom:18px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:#2bb673;box-shadow:0 0 0 4px rgba(43,182,115,.16);}
.hero-title{
 font-size:40px;line-height:1.26;font-weight:800;letter-spacing:-.02em;
 margin-bottom:16px;color:var(--ink);
}
.hero-title em{font-style:normal;color:var(--brand);}
.hero-lead{
 font-size:15.5px;line-height:1.85;color:var(--muted);
 max-width:580px;margin-bottom:22px;
}
.hero-points{display:grid;gap:10px;margin-bottom:26px;max-width:580px;}
.hero-points li{
 display:flex;gap:10px;align-items:flex-start;
 font-size:14.5px;color:var(--ink-2);line-height:1.7;
}
.hero-points svg{flex:0 0 18px;margin-top:4px;color:var(--brand);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.trust-bar{
 display:flex;flex-wrap:wrap;gap:8px 22px;
 padding-top:18px;border-top:1px dashed var(--line-strong);
 font-size:13px;color:var(--muted);
}
.trust-bar span{display:inline-flex;align-items:center;gap:6px;}
.trust-bar b{color:var(--brand-dark);font-size:14px;}
/* hero panel */
.hero-panel{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
 box-shadow:var(--shadow-lg);overflow:hidden;
}
.hero-panel figure{margin:0;position:relative;}
.hero-panel figure img{width:100%;height:186px;object-fit:cover;}
.hero-panel figure::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(180deg,rgba(10,32,70,0) 40%,rgba(10,32,70,.55) 100%);
}
.panel-caption{
 position:absolute;left:18px;right:18px;bottom:14px;z-index:2;
 color:#fff;font-size:13.5px;font-weight:600;letter-spacing:.01em;
}
.panel-body{padding:22px 22px 24px;}
.panel-body h2{font-size:16px;font-weight:700;margin-bottom:4px;}
.panel-body .panel-sub{font-size:13px;color:var(--muted);margin-bottom:16px;}
.panel-row{
 display:flex;align-items:center;justify-content:space-between;gap:12px;
 padding:12px 0;border-bottom:1px dashed var(--line);
 font-size:14px;color:var(--ink-2);
}
.panel-row:last-of-type{border-bottom:0;}
.panel-row code{
 font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
 font-size:12.5px;color:var(--brand-dark);background:var(--brand-soft);
 padding:3px 8px;border-radius:6px;
}
.panel-row b{color:var(--ink);font-weight:700;font-size:13.5px;}
.panel-foot{
 margin-top:16px;padding:12px 14px;border-radius:10px;
 background:var(--bg-tint);font-size:13px;color:var(--ink-2);line-height:1.7;
}
/* ---------- sections ---------- */
.section{padding:66px 0;}
.section.tint{background:var(--bg-tint);}
.section.plain{background:var(--bg);}
.section-head{max-width:780px;margin-bottom:34px;}
.eyebrow{
 display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.12em;
 color:var(--brand);margin-bottom:10px;
}
.eyebrow::before{
 content:"";display:inline-block;width:22px;height:2px;border-radius:2px;
 background:var(--brand);vertical-align:middle;margin-right:8px;
}
.section-head h2{font-size:28px;line-height:1.38;font-weight:800;letter-spacing:-.01em;}
.section-head p{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.8;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head.center .eyebrow::before{display:none;}
/* cards */
.card-grid{display:grid;gap:22px;}
.cols-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.cols-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.cols-4{grid-template-columns:repeat(4,minmax(0,1fr));}
.info-card{
 background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:26px 24px;height:100%;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.card-icon{
 width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
 background:var(--brand-soft);color:var(--brand);margin-bottom:16px;
}
.info-card h3{font-size:17.5px;font-weight:700;line-height:1.5;margin-bottom:9px;}
.info-card p{font-size:14.5px;color:var(--muted);line-height:1.78;}
.info-card .chip{margin-top:14px;}
/* split block */
.split{display:grid;grid-template-columns:1.04fr .96fr;gap:44px;align-items:start;}
.step-list{display:grid;gap:16px;counter-reset:step;}
.step-item{
 display:grid;grid-template-columns:40px 1fr;gap:16px;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:20px 22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.step-no{
 width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
 background:linear-gradient(135deg,var(--brand),var(--brand-2));
 color:#fff;font-weight:700;font-size:15px;
 box-shadow:0 8px 16px rgba(29,95,196,.22);
}
.step-item h3{font-size:16px;font-weight:700;margin-bottom:6px;}
.step-item p{font-size:14px;color:var(--muted);line-height:1.75;}
/* sample panel */
.sample-panel{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
 box-shadow:var(--shadow);padding:26px;position:sticky;top:88px;
}
.sample-panel h3{font-size:16.5px;font-weight:700;margin-bottom:6px;}
.sample-panel .sample-sub{font-size:13px;color:var(--muted);margin-bottom:18px;}
.sample-block{
 border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:14px;
}
.sample-block header{
 display:flex;align-items:center;justify-content:space-between;gap:10px;
 padding:11px 14px;background:var(--bg-tint);
 font-size:13px;font-weight:700;color:var(--brand-dark);
}
.sample-block ul{padding:14px;}
.sample-block ul li{
 display:flex;justify-content:space-between;gap:14px;
 font-size:13.5px;color:var(--ink-2);padding:7px 0;
 border-bottom:1px dashed var(--line);
}
.sample-block ul li:last-child{border-bottom:0;}
.sample-block ul li b{color:var(--ink);font-weight:700;}
.sample-note{font-size:13px;color:var(--muted);line-height:1.75;}
/* fan table rows */
.fan-list{display:grid;gap:12px;}
.fan-row{
 display:grid;grid-template-columns:170px 1fr auto;gap:18px;align-items:center;
 background:#fff;border:1px solid var(--line);border-radius:12px;
 padding:16px 22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.fan-row:hover{transform:translateX(3px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.fan-row h3{font-size:15.5px;font-weight:700;}
.fan-row p{font-size:14px;color:var(--muted);line-height:1.72;}
.fan-score{
 font-size:14px;font-weight:700;color:var(--brand-dark);
 background:var(--brand-soft);border-radius:999px;padding:5px 14px;white-space:nowrap;
}
/* scene cards */
.scene-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;height:100%;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.scene-card img{width:100%;height:150px;object-fit:cover;}
.scene-body{padding:20px 22px 24px;}
.scene-body h3{font-size:16.5px;font-weight:700;margin-bottom:8px;}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.75;}
.scene-body .tag-list{margin-top:14px;}
/* stats */
.stat-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:24px 22px;box-shadow:var(--shadow-sm);height:100%;
 transition:transform .2s ease,box-shadow .2s ease;
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.stat-num{font-size:32px;font-weight:800;color:var(--brand);letter-spacing:-.02em;line-height:1.2;}
.stat-num small{font-size:14px;font-weight:600;color:var(--muted);margin-left:4px;}
.stat-card h3{font-size:15px;font-weight:700;margin:8px 0 6px;}
.stat-card p{font-size:13.5px;color:var(--muted);line-height:1.72;}
/* audience list */
.aud-list{display:grid;gap:14px;}
.aud-item{
 display:flex;gap:14px;align-items:flex-start;
 background:#fff;border:1px solid var(--line);border-radius:12px;
 padding:18px 20px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.aud-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.aud-item svg{flex:0 0 22px;margin-top:2px;color:var(--brand);}
.aud-item h3{font-size:15.5px;font-weight:700;margin-bottom:4px;}
.aud-item p{font-size:14px;color:var(--muted);line-height:1.72;}
/* entries */
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.entry-card{
 display:flex;flex-direction:column;gap:10px;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm);height:100%;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line-strong);}
.entry-card h3{font-size:16px;font-weight:700;line-height:1.55;color:var(--ink);}
.entry-card p{font-size:14px;color:var(--muted);line-height:1.75;flex:1;}
.entry-meta{font-size:12.5px;color:var(--muted);letter-spacing:.01em;}
.empty-note{
 background:#fff;border:1px dashed var(--line-strong);border-radius:12px;
 padding:26px;text-align:center;color:var(--muted);font-size:14px;
}
/* faq */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{
 background:#fff;border:1px solid var(--line);border-radius:12px;
 box-shadow:var(--shadow-sm);overflow:hidden;
 transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:var(--line-strong);box-shadow:var(--shadow);}
.faq-item summary{
 display:flex;align-items:center;justify-content:space-between;gap:16px;
 padding:18px 22px;cursor:pointer;list-style:none;
 font-size:15.5px;font-weight:600;color:var(--ink);
 transition:color .2s ease,background .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
 content:"+";flex:0 0 auto;width:24px;height:24px;border-radius:8px;
 display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);
 font-size:16px;font-weight:700;transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"−";}
.faq-item summary:hover{color:var(--brand);background:#fbfdff;}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;}
.faq-body{padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.82;}
/* cta band */
.cta-band{
 position:relative;overflow:hidden;
 border-radius:var(--radius-lg);
 padding:44px 44px;
 background:linear-gradient(135deg,var(--brand-dark),var(--brand) 60%,var(--brand-2));
 color:#fff;box-shadow:var(--shadow-lg);
 display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center;
}
.cta-band::after{
 content:"";position:absolute;width:340px;height:340px;right:-110px;bottom:-160px;
 border-radius:50%;background:rgba(255,255,255,.12);
}
.cta-band h2{font-size:26px;font-weight:800;line-height:1.4;margin-bottom:10px;position:relative;z-index:1;}
.cta-band p{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.85);position:relative;z-index:1;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;position:relative;z-index:1;}
/* footer */
.site-footer{
 background:#0d1b31;color:#c3d2e8;
 padding:56px 0 26px;border-top:1px solid rgba(255,255,255,.06);
}
.footer-grid{
 display:grid;grid-template-columns:1.4fr .8fr 1fr;gap:40px;
 padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.10);
}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16.5px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-desc{font-size:14px;line-height:1.82;color:#93a7c4;max-width:400px;}
.footer-col h3{font-size:14.5px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-col ul{display:grid;gap:9px;}
.footer-col ul li a{font-size:14px;color:#93a7c4;transition:color .2s ease;}
.footer-col ul li a:hover{color:#fff;}
.footer-col p{font-size:14px;line-height:1.82;color:#93a7c4;}
.footer-bottom{
 display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
 padding-top:20px;font-size:13px;color:#7b8fac;
}
/* responsive */
@media (max-width:1024px){
 .hero-grid{grid-template-columns:1fr;gap:34px;}
 .hero-title{font-size:34px;}
 .split{grid-template-columns:1fr;gap:30px;}
 .sample-panel{position:static;}
 .cols-4{grid-template-columns:repeat(2,minmax(0,1fr));}
 .cols-3{grid-template-columns:repeat(2,minmax(0,1fr));}
 .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
 .cta-band{grid-template-columns:1fr;padding:36px 32px;}
 .cta-actions{justify-content:flex-start;}
 .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:992px){
 .nav-toggle{display:flex;}
 .nav-wrap{
  position:absolute;top:100%;left:0;right:0;
  flex-direction:column;align-items:stretch;gap:10px;
  background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 18px 34px rgba(16,40,80,.14);
  padding:14px 20px 20px;display:none;
 }
 .nav-wrap.open{display:flex;}
 .nav-list{flex-direction:column;align-items:stretch;gap:2px;}
 .nav-link{padding:11px 12px;font-size:15px;}
 .nav-cta{text-align:center;padding:12px 18px;}
}
@media (max-width:768px){
 .section{padding:48px 0;}
 .page-hero{padding:40px 0 44px;}
 .hero-title{font-size:29px;}
 .hero-lead{font-size:15px;}
 .section-head h2{font-size:23px;}
 .cols-2,.cols-3,.cols-4,.entry-grid{grid-template-columns:1fr;}
 .fan-row{grid-template-columns:1fr;gap:8px;}
 .fan-score{justify-self:start;}
 .cta-band h2{font-size:22px;}
 .footer-grid{grid-template-columns:1fr;gap:28px;}
 .btn{padding:11px 20px;font-size:14.5px;min-height:44px;}
}
@media (max-width:520px){
 .container{padding:0 16px;}
 .hero-title{font-size:25px;}
 .brand-text{font-size:15px;}
 .info-card{padding:22px 20px;}
 .hero-panel figure img{height:160px;}
 .trust-bar{gap:8px 14px;font-size:12.5px;}
}

/* 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}