/* roulang page: index */
:root{
  --primary:#2f6df6;
  --primary-deep:#1c4ed8;
  --violet:#7a5af5;
  --accent:#ff8040;
  --accent-light:#ffb380;
  --bg:#f2f6fc;
  --bg-soft:#eef3fb;
  --white:#ffffff;
  --ink:#14203a;
  --ink-soft:#56617a;
  --ink-faint:#8b94a8;
  --line:rgba(20,32,58,.09);
  --line-strong:rgba(20,32,58,.14);
  --grad-brand:linear-gradient(135deg,#2f6df6 0%,#8a5cfa 100%);
  --grad-sky:linear-gradient(180deg,#f6faff 0%,#ffffff 100%);
  --radius-xs:8px;
  --radius-sm:12px;
  --radius-md:16px;
  --radius-lg:22px;
  --radius-pill:999px;
  --shadow-xs:0 2px 8px rgba(20,32,58,.04);
  --shadow-sm:0 6px 18px rgba(20,32,58,.06);
  --shadow-md:0 12px 32px rgba(20,32,58,.08);
  --shadow-brand:0 14px 28px rgba(47,109,246,.22);
  --container:1240px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;border:none;background:none;cursor:pointer}
input,select,textarea{font:inherit}
ul,ol{list-style:none}
.container{width:min(var(--container),92%);margin-left:auto;margin-right:auto}
.section{padding:clamp(64px,8vw,96px) 0;position:relative}
.bg-white{background:var(--white)}
.bg-soft{background:var(--bg)}

/* === Buttons === */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:15px;line-height:1;padding:14px 22px;
  border-radius:12px;border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn svg{width:17px;height:17px;flex:none}
.btn-primary{
  background:var(--grad-brand);color:#fff;box-shadow:var(--shadow-brand)
}
.btn-primary:hover{
  transform:translateY(-2px);box-shadow:0 18px 36px rgba(47,109,246,.3)
}
.btn-outline{
  background:transparent;color:var(--primary-deep);border-color:rgba(47,109,246,.38)
}
.btn-outline:hover{
  border-color:var(--primary);background:rgba(47,109,246,.06);transform:translateY(-1px)
}
.btn-accent{
  background:linear-gradient(135deg,#ff7e3b,#ff9e5f);color:#fff;box-shadow:0 12px 28px rgba(255,126,59,.24)
}
.btn-accent:hover{
  transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,126,59,.32)
}
.btn:focus-visible,.nav-toggle:focus-visible,.faq-q:focus-visible,.search-mini:focus-within{
  outline:3px solid rgba(47,109,246,.35);outline-offset:2px
}

/* === Header === */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:76px;display:flex;align-items:center;gap:18px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:38px;height:38px;border-radius:12px;flex:none;
  display:grid;place-items:center;color:#fff;
  background:var(--grad-brand);box-shadow:0 8px 18px rgba(90,90,246,.2)
}
.brand-text{
  font-weight:700;font-size:18px;letter-spacing:-.01em;color:var(--ink)
}
.main-nav{display:flex;align-items:center;gap:8px;margin-left:18px}
.nav-link{
  position:relative;display:block;font-size:15px;font-weight:500;
  padding:10px 13px;color:var(--ink-soft);border-radius:10px;
  transition:color .2s var(--ease),background .2s var(--ease)
}
.nav-link:hover{color:var(--ink);background:rgba(47,109,246,.06)}
.nav-link.active{color:var(--primary-deep);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:3px;
  border-radius:var(--radius-pill);background:var(--grad-brand)
}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.search-mini{
  display:flex;align-items:center;gap:8px;
  width:238px;height:40px;padding:0 10px 0 14px;
  background:#f0f3fb;border:1px solid rgba(20,32,58,.06);
  border-radius:12px;color:#8791a7;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  cursor:text
}
.search-mini:focus-within{
  border-color:rgba(47,109,246,.45);box-shadow:0 0 0 4px rgba(47,109,246,.08)
}
.search-mini input{
  border:none;outline:none;background:transparent;flex:1;min-width:0;
  color:var(--ink);font-size:13px
}
.search-mini input::placeholder{color:var(--ink-faint)}
.search-mini kbd{
  font-family:inherit;font-size:11px;border:1px solid rgba(20,32,58,.1);
  border-radius:6px;background:#fff;color:var(--ink-faint);padding:1px 6px;line-height:1.6
}
.btn-header{padding:11px 18px;font-size:14px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;color:var(--ink);
  background:#f2f4fa;border:1px solid var(--line);place-items:center
}
.nav-toggle svg{width:20px;height:20px}

/* === Hero === */
.hero{
  position:relative;overflow:hidden;min-height:620px;
  display:flex;align-items:center;
  padding:80px 0 110px
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    linear-gradient(90deg,rgba(247,250,255,.96) 0%,rgba(247,250,255,.84) 48%,rgba(234,240,255,.64) 100%),
    url("/assets/images/backpic/back-1.webp") center/cover no-repeat
}
.hero-bg::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(47,109,246,.08) 1px,transparent 1px);
  background-size:26px 26px;opacity:.7;
  mask-image:linear-gradient(90deg,#000,transparent 80%);
  -webkit-mask-image:linear-gradient(90deg,#000,transparent 80%);
}
.hero-main{position:relative;z-index:2;max-width:880px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.72);
  border:1px solid rgba(47,109,246,.14);
  padding:7px 14px;border-radius:var(--radius-pill);
  color:var(--primary-deep);font-size:13px;font-weight:600;
  backdrop-filter:blur(8px);
  box-shadow:var(--shadow-xs)
}
.hero-title{
  font-size:clamp(32px,5vw,48px);line-height:1.26;letter-spacing:-.02em;
  font-weight:700;color:var(--ink);margin:20px 0 18px
}
.hero-sub{
  font-size:16px;line-height:1.9;color:var(--ink-soft);max-width:680px
}
.hero-cta{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:34px
}
.hero-metrics{
  position:relative;z-index:2;
  display:flex;flex-wrap:wrap;gap:10px;margin-top:44px
}
.metric-tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.72);border:1px solid rgba(20,32,58,.08);
  font-size:13px;color:var(--ink-soft);backdrop-filter:blur(8px);
  box-shadow:var(--shadow-xs)
}
.metric-tag i{width:7px;height:7px;border-radius:50%;flex:none}
.metric-tag i.c1{background:var(--primary)}
.metric-tag i.c2{background:#28c9ad}
.metric-tag i.c3{background:var(--accent)}
.metric-tag i.c4{background:#8a5cfa}
.metric-tag strong{color:var(--ink);font-weight:700}

/* === Section head === */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:40px
}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--primary);
  background:rgba(47,109,246,.09);padding:6px 12px;border-radius:var(--radius-pill)
}
.content-title{
  font-size:clamp(25px,3vw,32px);line-height:1.38;color:var(--ink);
  margin-top:14px;letter-spacing:-.01em
}
.content-desc{
  color:var(--ink-soft);font-size:15px;max-width:420px;margin-top:10px
}
.head-note{
  color:var(--ink-faint);font-size:14px;max-width:340px;
  border-left:2px solid rgba(47,109,246,.22);padding-left:14px
}

/* === Tier section === */
.tier-grid{
  display:grid;grid-template-columns:390px 1fr;gap:34px;align-items:stretch
}
.tier-intro{
  background:var(--grad-brand);border-radius:var(--radius-lg);
  color:#fff;padding:38px;position:relative;overflow:hidden;
  display:flex;flex-direction:column;justify-content:space-between;
  box-shadow:var(--shadow-md)
}
.tier-intro::before{
  content:"";position:absolute;right:-50px;top:-50px;width:180px;height:180px;
  border-radius:50%;background:rgba(255,255,255,.12)
}
.tier-intro::after{
  content:"";position:absolute;right:-8px;bottom:-16px;width:110px;height:110px;
  border-radius:50%;background:rgba(255,255,255,.08)
}
.tier-intro h3{font-size:24px;font-weight:700;margin-bottom:12px}
.tier-intro p{font-size:15px;opacity:.92;line-height:2;margin-bottom:22px}
.tier-intro-num{font-size:14px;opacity:.8}
.tier-stack{display:flex;flex-direction:column;gap:16px}
.tier-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
  padding:24px 28px;box-shadow:var(--shadow-xs);
  display:grid;grid-template-columns:150px 1fr auto;gap:22px;align-items:center;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease)
}
.tier-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.tier-ranking{display:flex;align-items:center;gap:12px}
.rank-badge{
  min-width:84px;text-align:center;background:#f0f4fe;color:var(--primary-deep);
  font-size:13px;font-weight:700;padding:7px 6px;border-radius:var(--radius-xs)
}
.tier-card.card-violet .rank-badge{background:#f1edff;color:#6135d9}
.tier-card.card-accent .rank-badge{background:#fff1ea;color:#e75b22}
.tier-main h3{font-size:18px;font-weight:700}
.tier-main p{color:var(--ink-soft);font-size:14px;line-height:1.85;margin-top:6px}
.tier-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--primary);background:#f3f6ff;padding:9px 14px;border-radius:var(--radius-pill)
}
.tier-link svg{width:15px;height:15px;transition:transform .2s}
.tier-link:hover svg{transform:translateX(3px)}

/* === Plan section === */
.plan-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch
}
.plan-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px 28px;position:relative;box-shadow:var(--shadow-xs);
  display:flex;flex-direction:column;transition:transform .24s var(--ease),box-shadow .24s var(--ease)
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.plan-card .plan-name{font-size:20px;font-weight:700}
.plan-card .plan-slogan{color:var(--ink-faint);font-size:14px;margin-top:6px}
.plan-list{margin-top:24px;padding-top:24px;border-top:1px solid var(--line);flex:1}
.plan-list li{
  display:flex;gap:10px;align-items:flex-start;color:var(--ink-soft);
  font-size:14px;line-height:1.7;margin-bottom:12px;
}
.checkicon{
  width:20px;height:20px;flex:none;border-radius:50%;
  background:rgba(47,109,246,.12);color:var(--primary);
  display:grid;place-items:center;margin-top:3px
}
.checkicon svg{width:11px;height:11px}
.minusicon{
  width:20px;height:20px;flex:none;border-radius:50%;
  background:#eef2f7;color:#a1aabd;display:grid;place-items:center;margin-top:3px
}
.minusicon svg{width:10px;height:10px}
.plan-more{margin-top:28px}
.plan-featured{
  border:2px solid transparent;
  background:
    linear-gradient(#fff,#fff) padding-box,
    var(--grad-brand) border-box;
  box-shadow:var(--shadow-md)
}
.plan-featured .plan-name{color:var(--primary-deep)}
.plan-pop{
  position:absolute;top:-14px;right:20px;
  background:linear-gradient(135deg,#ff8040,#ffb063);color:#fff;
  font-size:12px;font-weight:700;padding:5px 13px;border-radius:var(--radius-pill);
  box-shadow:0 6px 16px rgba(255,128,64,.3)
}
.plan-note{
  display:flex;gap:6px;align-items:center;
  font-size:12px;font-weight:700;background:#fff8ec;color:#c66f28;
  padding:7px 12px;border-radius:var(--radius-pill);margin-bottom:16px;width:fit-content
}

/* === Flash / promo section === */
.flash-banner{
  position:relative;border-radius:24px;overflow:hidden;
  background:
    linear-gradient(105deg,rgba(42,67,131,.92) 0%,rgba(61,80,166,.82) 45%,rgba(106,83,207,.78) 100%),
    url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  color:#fff;padding:44px 46px;
  display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center;
  box-shadow:0 18px 44px rgba(66,73,176,.25)
}
.flash-banner::before{
  content:"";position:absolute;left:60%;top:-70px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.12),transparent 60%)
}
.flash-info{position:relative;z-index:2}
.flash-label{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.2);
  padding:6px 14px;border-radius:var(--radius-pill);font-size:13px;font-weight:600
}
.flash-info h3{font-size:28px;line-height:1.4;margin:16px 0 12px;font-weight:700}
.flash-info p{font-size:15px;opacity:.92;max-width:600px}
.flash-right{position:relative;z-index:2;text-align:center}
.countdown-nums{
  display:inline-flex;gap:10px;align-items:center;margin-bottom:20px
}
.cd-num{
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);
  backdrop-filter:blur(8px);border-radius:14px;
  width:76px;padding:12px 4px;text-align:center
}
.cd-num span{display:block;font-size:28px;font-weight:700;font-variant-numeric:tabular-nums}
.cd-num small{font-size:12px;opacity:.75}
.cd-colon{font-size:22px;opacity:.7;font-weight:700}
.btn-white{
  display:inline-flex;align-items:center;gap:8px;background:#fff;color:#4a4fd1;
  padding:13px 22px;border-radius:12px;font-size:15px;font-weight:700;
  box-shadow:0 10px 22px rgba(15,8,40,.16);transition:transform .2s var(--ease),box-shadow .2s var(--ease)
}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(15,8,40,.24)}

/* === Update / CMS === */
.updates-wrap{
  background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px;box-shadow:var(--shadow-xs)
}
.news-filters{
  display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px;
  border-bottom:1px solid var(--line);padding-bottom:18px
}
.filter-chip{
  padding:8px 14px;border-radius:var(--radius-pill);
  background:#f0f3fb;color:var(--ink-soft);font-size:13px;font-weight:500;
  transition:background .2s,color .2s
}
.filter-chip.active{
  background:var(--grad-brand);color:#fff;box-shadow:0 6px 14px rgba(47,109,246,.2)
}
.news-list{display:flex;flex-direction:column;gap:18px}
.news-card{
  display:grid;grid-template-columns:280px 1fr;gap:0;
  border:1px solid rgba(20,32,58,.09);border-radius:var(--radius-md);
  overflow:hidden;background:#fff;transition:transform .25s var(--ease),border-color .25s,box-shadow .25s;
}
.news-card:hover{
  transform:translateY(-3px);border-color:rgba(47,109,246,.3);box-shadow:var(--shadow-sm)
}
.news-cover{position:relative;overflow:hidden;min-height:170px}
.news-cover img{
  width:100%;height:100%;object-fit:cover;position:absolute;inset:0
}
.news-info{padding:20px 24px;display:flex;flex-direction:column;align-items:flex-start}
.news-meta{
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--ink-faint);margin-bottom:8px
}
.category-label{
  color:var(--primary-deep);font-weight:600;background:rgba(47,109,246,.08);
  padding:3px 10px;border-radius:var(--radius-pill)
}
.news-title{font-size:19px;font-weight:700;line-height:1.45}
.news-title a{color:var(--ink)}
.news-title a:hover{color:var(--primary-deep)}
.news-excerpt{
  color:var(--ink-faint);font-size:14px;line-height:1.85;margin-top:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden
}
.read-more{
  display:inline-flex;align-items:center;gap:6px;margin-top:auto;padding-top:14px;
  font-size:14px;font-weight:600;color:var(--primary)
}
.read-more svg{width:16px;height:16px;transition:transform .2s var(--ease)}
.news-card:hover .read-more svg{transform:translateX(4px)}
.empty-tip{
  padding:44px 20px;text-align:center;color:var(--ink-faint);font-size:15px;
  background:#f8fafd;border:1px dashed rgba(20,32,58,.15);border-radius:14px
}
.more-panel{
  margin-top:20px;text-align:center
}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-weight:600;color:var(--primary-deep);font-size:15px;padding:10px 20px;
  border-radius:var(--radius-pill);background:rgba(47,109,246,.08);
  transition:background .2s
}
.link-more:hover{background:rgba(47,109,246,.14)}

/* === Guide row === */
.guide-grid{
  display:grid;grid-template-columns:.95fr 1.05fr;gap:52px;align-items:center
}
.guide-media{position:relative}
.guide-media img{
  border-radius:22px;aspect-ratio:4/3;object-fit:cover;width:100%;
  box-shadow:var(--shadow-md)
}
.guide-media::before{
  content:"";position:absolute;left:-20px;top:-20px;width:130px;height:130px;
  border-radius:50%;background:linear-gradient(135deg,rgba(47,109,246,.18),rgba(138,92,250,.14));
  z-index:-1
}
.guide-steps{margin-top:22px;display:grid;gap:14px}
.guide-step{
  display:flex;gap:16px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 18px;
  transition:border-color .2s,box-shadow .2s
}
.guide-step:hover{border-color:rgba(47,109,246,.3);box-shadow:var(--shadow-xs)}
.guide-num{
  width:40px;height:40px;flex:none;border-radius:12px;
  display:grid;place-items:center;background:rgba(47,109,246,.1);
  color:var(--primary);font-weight:800;font-size:16px
}
.guide-step h4{font-size:16px;font-weight:700;margin-bottom:4px}
.guide-step p{font-size:14px;color:var(--ink-soft);line-height:1.8}

/* === FAQ */
.faq-wrap{
  display:grid;grid-template-columns:400px 1fr;gap:40px;align-items:start
}
.faq-intro-sticky{position:sticky;top:108px}
.faq-intro h2{font-size:31px;line-height:1.38}
.faq-intro p{color:var(--ink-soft);font-size:15px;margin-top:18px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  overflow:hidden;box-shadow:var(--shadow-xs);transition:box-shadow .2s
}
.faq-item.active{box-shadow:var(--shadow-sm);border-color:rgba(47,109,246,.28)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;color:var(--ink);font-size:16px;font-weight:600;line-height:1.6
}
.faq-icon{
  width:26px;height:26px;border-radius:50%;background:#eef2fb;color:var(--primary);
  display:grid;place-items:center;flex:none;transition:transform .25s var(--ease)
}
.faq-icon svg{width:14px;height:14px}
.faq-item.active .faq-icon{transform:rotate(45deg);background:rgba(47,109,246,.14)}
.faq-a{
  display:none;border-top:1px solid rgba(20,32,58,.06);padding:4px 20px 18px;
  color:var(--ink-soft);font-size:15px;line-height:2
}
.faq-item.active .faq-a{display:block}

/* === Contact / form */
.contact-wrap{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:38px;align-items:start
}
.contact-info{background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--shadow-xs)}
.contact-info h3{font-size:20px;font-weight:700;margin-bottom:14px}
.contact-info p{color:var(--ink-soft);font-size:15px}
.contact-item{
  display:flex;gap:12px;padding:16px 0;border-bottom:1px solid var(--line);align-items:flex-start
}
.contact-item:last-child{border-bottom:none}
.citem-icon{
  width:38px;height:38px;flex:none;border-radius:11px;
  background:rgba(47,109,246,.1);color:var(--primary);
  display:grid;place-items:center
}
.citem-icon svg{width:19px;height:19px}
.citem-label{font-size:13px;color:var(--ink-faint)}
.citem-text{font-size:15px;font-weight:600;color:var(--ink);margin-top:2px}
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:22px;
  padding:30px 30px 32px;box-shadow:var(--shadow-sm)
}
.form-card h3{font-size:21px;font-weight:700;margin-bottom:8px}
.form-card .form-tip{color:var(--ink-faint);font-size:14px;margin-bottom:22px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.form-group{margin-bottom:15px}
.form-group.full{grid-column:1/-1}
.form-group label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.form-control{
  width:100%;padding:12px 13px;background:#f3f6fc;border:1px solid transparent;
  border-radius:11px;color:var(--ink);font-size:14px;transition:border-color .2s,box-shadow .2s,background .2s;
}
.form-control:focus{
  outline:none;background:#fff;border-color:rgba(47,109,246,.45);
  box-shadow:0 0 0 4px rgba(47,109,246,.08)
}
select.form-control{cursor:pointer}
textarea.form-control{resize:vertical;min-height:110px}
.btn-submit{width:100%;justify-content:center;margin-top:4px}

/* === Footer */
.footer{
  background:#182139;color:#b6c0d8;padding-top:64px;margin-top:0
}
.footer-grid{
  display:grid;grid-template-columns:1.3fr .8fr .8fr 1.1fr;gap:34px;
  padding-bottom:46px;border-bottom:1px solid rgba(255,255,255,.08)
}
.footer-title{
  color:#fff;font-size:15px;font-weight:700;letter-spacing:.04em;margin-bottom:14px
}
.footer-brand{font-size:18px;font-weight:700;color:#fff;display:inline-flex;gap:8px;align-items:center}
.footer-brand svg{width:24px;height:24px;color:#a4b7ff}
.footer-desc{font-size:14px;line-height:1.9;margin-top:14px}
.footer-list li{margin-bottom:8px}
.footer-list a{
  font-size:14px;color:#b6c0d8;transition:color .2s,padding-left .2s
}
.footer-list a:hover{color:#fff;padding-left:4px}
.footer-tag{
  display:inline-block;background:rgba(255,255,255,.1);color:#e8edf8;
  font-size:12px;border-radius:6px;padding:4px 8px;margin:0 6px 6px 0
}
.footer-bottom{
  padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:#8d97ad
}
.footer-bottom a{color:#c5cee0}
.footer-bottom a:hover{color:#fff}

/* === Responsive === */
@media(max-width:1180px){
  .search-mini{width:190px}
  .header-inner{gap:12px}
  .plan-grid{gap:16px}
  .plan-card{padding:22px 20px}
  .flash-banner{padding:34px 28px}
}
@media(max-width:1024px){
  .main-nav{display:none}
  .nav-toggle{display:grid}
  .search-mini{display:none}
  .header-tools{margin-left:auto;gap:8px}
  .nav-open .main-nav{
    display:flex;flex-direction:column;gap:4px;
    position:absolute;top:76px;left:14px;right:14px;
    background:rgba(255,255,255,.98);border:1px solid var(--line);
    border-radius:16px;padding:12px;box-shadow:var(--shadow-md)
  }
  .nav-open .nav-link{padding:13px 14px}
  .tier-grid{grid-template-columns:1fr}
  .tier-intro{min-height:220px}
  .plan-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto}
  .plan-pop{top:-11px;left:20px;right:auto}
  .flash-banner{grid-template-columns:1fr}
  .flash-right{display:flex;flex-direction:column;align-items:center}
  .contact-wrap,.faq-wrap{grid-template-columns:1fr}
  .faq-intro-sticky{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:767px){
  .container{width:calc(100% - 36px)}
  .hero{padding:46px 0 90px;min-height:0}
  .hero-metrics{margin-top:28px}
  .header-inner{height:68px}
  .nav-open .main-nav{top:66px}
  .brand-text{font-size:16px}
  .btn-header{display:none}
  .tier-grid{gap:20px}
  .tier-card{grid-template-columns:1fr;gap:14px;padding:20px}
  .tier-intro{padding:26px 22px}
  .plan-grid{max-width:100%}
  .news-card{grid-template-columns:1fr}
  .news-cover{min-height:190px;height:190px}
  .news-cover img{position:static;height:190px}
  .section-head{flex-direction:column;align-items:flex-start}
  .updates-wrap{padding:18px}
  .news-info{padding:16px}
  .guide-grid{grid-template-columns:1fr;gap:32px}
  .guide-media img{aspect-ratio:4/3.3}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{align-items:flex-start;flex-direction:column}
  .countdown-nums{gap:6px}
  .cd-num{width:64px;padding:10px 2px}
  .cd-num span{font-size:22px}
  .flash-banner{padding:30px 20px}
}
@media(max-width:440px){
  .hero-cta .btn{width:100%}
  .flash-info h3{font-size:22px}
  .brand-mark{width:34px;height:34px}
  .metric-tag{font-size:12px;padding:6px 10px}
}

/* roulang page: article */
:root {
  --primary: #1689ff;
  --primary-dark: #0d63c7;
  --blue-light: #3fb6ff;
  --violet: #7756f8;
  --accent: #ffa13a;
  --bg: #f5f8fc;
  --surface: #ffffff;
  --text: #152238;
  --text-soft: #4b617e;
  --text-faint: #7c8aa0;
  --border: #e4ecf5;
  --gradient: linear-gradient(135deg, #3fb6ff 0%, #1689ff 48%, #7756f8 100%);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(21,110,190,.06), 0 1px 2px rgba(15,30,60,.04);
  --shadow-md: 0 8px 30px rgba(21,110,190,.10);
  --shadow-hover: 0 14px 36px rgba(21,110,190,.14);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  border: none;
  outline: none;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 22px;
  height: 44px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  transition: all .25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 22px rgba(22,137,255,.32);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(22,137,255,.42);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(22,137,255,.3);
  outline-offset: 3px;
}

.btn-outline {
  background: rgba(255,255,255,.75);
  color: var(--primary-dark);
  border: 1px solid rgba(22,137,255,.35);
  backdrop-filter: blur(6px);
}

.btn-outline:hover {
  background: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-outline:focus-visible {
  outline: 3px solid rgba(22,137,255,.25);
  outline-offset: 3px;
}

.btn-header {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
  border-radius: var(--radius-sm);
}

/* ===== 头部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(228,236,245,.92);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
  flex-shrink: 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 6px 16px rgba(22,137,255,.3);
}

.brand-text {
  color: var(--text);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-soft);
  border-radius: 999px;
  transition: color .2s ease, background .2s ease;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(22,137,255,.06);
}

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 18px;
  height: 3px;
  border-radius: 3px;
  background: var(--gradient);
  transform: translateX(-50%);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.search-mini {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 220px;
  height: 38px;
  padding: 0 10px 0 14px;
  background: #f0f4fa;
  color: var(--text-faint);
  border-radius: 999px;
  border: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}

.search-mini:focus-within {
  background: #fff;
  border-color: rgba(22,137,255,.35);
  box-shadow: 0 0 0 4px rgba(22,137,255,.07);
}

.search-mini input {
  flex: 1;
  min-width: 0;
  background: transparent;
  font-size: 13px;
  color: var(--text);
}

.search-mini input::placeholder {
  color: #9dabc0;
}

.search-mini kbd {
  font-size: 11px;
  font-family: inherit;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-faint);
  padding: 1px 6px;
  line-height: 1.4;
  box-shadow: 0 1px 2px rgba(0,0,0,.02);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

/* ===== 正文布局 ===== */
.main-shell {
  min-height: 60vh;
}

.article-wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 56px 32px 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  line-height: 2;
  color: var(--text-faint);
  margin-bottom: 26px;
  gap: 6px;
}

.breadcrumb a {
  display: inline-flex;
  align-items: center;
  color: var(--text-soft);
  transition: color .2s ease;
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb .sep {
  color: #c2cedc;
  margin: 0 4px;
}

.breadcrumb .current {
  color: var(--text-soft);
  max-width: 240px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: inline-block;
  vertical-align: middle;
}

.post-header {
  margin-bottom: 34px;
}

.category-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(22,137,255,.08);
  border: 1px solid rgba(22,137,255,.16);
  margin-bottom: 14px;
}

.post-title {
  font-size: 44px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
  margin-bottom: 20px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-faint);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-item .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #c3d2df;
}

.featured-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  margin-bottom: 40px;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
}

.featured-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-body {
  max-width: 840px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 52px;
  box-shadow: var(--shadow-sm);
  color: #27364d;
  font-size: 16px;
  line-height: 1.9;
}

.article-body p {
  margin-bottom: 22px;
}

.article-body h2 {
  font-size: 24px;
  line-height: 1.5;
  margin: 38px 0 16px;
  color: var(--text);
}

.article-body h3 {
  font-size: 19px;
  line-height: 1.55;
  margin: 30px 0 12px;
  color: var(--text);
}

.article-body h4 {
  font-size: 17px;
  margin: 24px 0 10px;
  color: var(--text);
}

.article-body ul {
  margin: 0 0 22px;
  padding: 0;
}

.article-body ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
}

.article-body ul li::before {
  content: "";
  position: absolute;
  top: .7em;
  left: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--violet));
}

.article-body ol {
  padding-left: 22px;
  margin-bottom: 22px;
}

.article-body ol li {
  padding-left: 6px;
  margin-bottom: 8px;
  list-style: decimal;
}

.article-body blockquote {
  margin: 28px 0;
  padding: 18px 22px;
  border-left: 4px solid var(--primary);
  background: #f2f7fd;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-soft);
  font-size: 15px;
}

.article-body pre {
  background: #0f1d30;
  color: #d7e3f4;
  padding: 22px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 22px;
  font-size: 13px;
  line-height: 1.7;
}

.article-body code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.article-body a {
  color: var(--primary);
  border-bottom: 1px solid rgba(22,137,255,.25);
  transition: border-color .2s ease, color .2s ease;
}

.article-body a:hover {
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
}

.article-body img {
  border-radius: var(--radius-md);
  margin: 30px 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
}

.article-body th {
  background: #f1f5fb;
  color: var(--text);
  padding: 12px 14px;
  text-align: left;
  border: 1px solid var(--border);
}

.article-body td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  color: var(--text-soft);
}

/* ===== 上篇下篇 ===== */
.adjacent-posts {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  align-items: center;
  margin: 44px auto 0;
  max-width: 880px;
  padding: 0 32px;
}

.adjacent-link {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  display: block;
}

.adjacent-link:hover {
  transform: translateY(-2px);
  border-color: rgba(22,137,255,.4);
  box-shadow: var(--shadow-md);
}

.adjacent-link.next {
  text-align: right;
}

.adjacent-label {
  display: block;
  font-size: 12px;
  color: var(--text-faint);
  margin-bottom: 6px;
  letter-spacing: .04em;
}

.adjacent-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.adjacent-back {
  flex-shrink: 0;
  text-align: center;
}

.adjacent-back a {
  display: inline-flex;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  transition: all .25s ease;
}

.adjacent-back a:hover {
  background: rgba(22,137,255,.06);
  border-color: rgba(22,137,255,.35);
  transform: translateY(-2px);
}

/* ===== 推荐区 ===== */
.related-section {
  position: relative;
  padding: 88px 32px 40px;
  max-width: 1280px;
  margin: 0 auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(22,137,255,.08);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.section-title-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin: 16px 0 36px;
}

.section-title-h2 {
  font-size: 30px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--text);
  margin: 6px 0 0;
}

.section-desc {
  max-width: 420px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
  display: flex;
  flex-direction: column;
}

.info-card:hover {
  transform: translateY(-4px);
  border-color: rgba(22,137,255,.34);
  box-shadow: var(--shadow-hover);
}

.info-card-media {
  position: relative;
  height: 176px;
  overflow: hidden;
  background: #e8f2fc;
}

.info-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.info-card:hover .info-card-media img {
  transform: scale(1.04);
}

.card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(6px);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--text-soft);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

.info-card-body {
  padding: 22px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 17px;
  line-height: 1.55;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.6em;
}

.card-text {
  font-size: 14px;
  color: var(--text-faint);
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap .2s ease, color .2s ease;
}

.card-link:hover {
  color: var(--primary-dark);
  gap: 10px;
}

/* ===== CTA 区 ===== */
.cta-block {
  max-width: 1280px;
  margin: 80px auto;
  padding: 0 32px;
}

.cta-panel {
  position: relative;
  overflow: hidden;
  padding: 64px 56px;
  border-radius: 24px;
  background:
    linear-gradient(90deg, rgba(13,65,132,.78), rgba(53,28,156,.52)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: 0 20px 50px rgba(21,110,190,.2);
}

.cta-copy {
  max-width: 620px;
}

.cta-copy h2 {
  font-size: 28px;
  line-height: 1.45;
  font-weight: 700;
  margin-bottom: 14px;
}

.cta-copy p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255,255,255,.85);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  flex-shrink: 0;
}

.cta-actions .btn-white {
  background: #fff;
  color: var(--primary-dark);
  border: none;
}

.cta-actions .btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0,0,0,.2);
}

.cta-actions .btn-ghost {
  background: rgba(255,255,255,.14);
  color: #fff;
  border: 1px solid rgba(255,255,255,.45);
  backdrop-filter: blur(8px);
}

.cta-actions .btn-ghost:hover {
  background: rgba(255,255,255,.2);
  transform: translateY(-2px);
}

/* ===== 未找到 ===== */
.notfound-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 120px 32px;
}

.notfound-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  padding: 80px 24px;
  box-shadow: var(--shadow-sm);
  max-width: 680px;
  margin: 0 auto;
}

.notfound-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(22,137,255,.1), rgba(119,86,248,.1));
  display: grid;
  place-items: center;
  color: var(--primary);
}

.notfound-card h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.notfound-card p {
  color: var(--text-soft);
  font-size: 16px;
  margin-bottom: 28px;
}

/* ===== 页脚 ===== */
.footer {
  background: #f0f4fa;
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
  margin-top: 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr .8fr 1.2fr;
  gap: 44px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
}

.footer-brand svg {
  width: 22px;
  height: 22px;
  color: var(--primary);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 300px;
}

.footer-tag {
  display: inline-block;
  margin: 4px 8px 0 0;
  font-size: 12px;
  padding: 4px 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-soft);
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-list a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-soft);
  transition: color .2s ease;
}

.footer-list a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid rgba(21,34,56,.08);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--text-faint);
}

/* ===== 响应式 ===== */
@media (max-width: 1180px) {
  .search-mini {
    width: 170px;
  }

  .header-tools {
    gap: 8px;
  }

  .article-body {
    padding: 38px 38px;
  }
}

@media (max-width: 1023px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 24px 22px;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 24px 40px rgba(21,110,190,.08);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease, transform .25s ease;
  }

  .main-nav.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-link {
    border-radius: 12px;
    padding: 12px 16px;
  }

  .nav-link.active::after {
    display: block;
    left: 24px;
    width: 20px;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
  }

  .search-mini {
    width: 46px;
    padding: 0 13px;
  }

  .search-mini input,
  .search-mini kbd {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cta-panel {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }

  .brand-text {
    font-size: 15px;
  }

  .article-wrap {
    padding: 40px 20px 0;
  }

  .breadcrumb .current {
    max-width: 160px;
  }

  .post-title {
    font-size: 30px;
  }

  .post-meta {
    gap: 10px;
  }

  .featured-media {
    min-height: 210px;
  }

  .article-body {
    padding: 28px 22px;
    font-size: 15px;
    line-height: 1.85;
  }

  .article-body h2 {
    font-size: 21px;
  }

  .article-body h3 {
    font-size: 18px;
  }

  .adjacent-posts {
    grid-template-columns: 1fr;
    padding: 0 20px;
  }

  .adjacent-back {
    display: none;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card-title {
    min-height: 0;
  }

  .related-section,
  .cta-block {
    padding-left: 20px;
    padding-right: 20px;
  }

  .section-title-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .section-title-h2 {
    font-size: 24px;
  }

  .cta-panel {
    padding: 40px 22px;
    border-radius: 18px;
  }

  .cta-copy h2 {
    font-size: 23px;
  }

  .cta-actions {
    flex-direction: column;
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .header-inner {
    gap: 12px;
  }

  .btn-header {
    display: none;
  }

  .search-mini {
    width: 40px;
    padding: 0 12px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--primary) !important;
  background: #fff !important;
  box-shadow: 0 0 0 4px rgba(22,137,255,.08) !important;
}

/* roulang page: category1 */
:root{
  --sky:#2f89ff;
  --blue:#1e6fe8;
  --violet:#7e6cf2;
  --indigo:#4f5ae8;
  --sun:#f9a33c;
  --sun-deep:#f07f2d;
  --bg:#f5f8fc;
  --surface:#ffffff;
  --muted:#5c6f88;
  --subtle:#76879d;
  --text:#10233e;
  --line:#dfe8f2;
  --line-soft:#eaf0f6;
  --shadow-sm:0 6px 16px rgba(24,52,86,.06);
  --shadow-md:0 18px 40px rgba(24,52,86,.08);
  --shadow-lift:0 24px 52px rgba(38,76,128,.14);
  --radius-xl:28px;
  --radius-lg:20px;
  --radius-md:14px;
  --container:1240px;
  --font-main:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-main);
  color:var(--text);
  background:
    radial-gradient(circle at 6% 3%, rgba(47,137,255,.08), transparent 22rem),
    radial-gradient(circle at 94% 18%, rgba(126,108,242,.07), transparent 24rem),
    var(--bg);
  line-height:1.75;
  font-size:16px;
}
body.nav-open{overflow:hidden}
body,div,section,main,footer,header,nav,p,h1,h2,h3,h4,ul,li,form,input,select,textarea,button,a,span,dl,dt,dd,details,summary,article,aside,figure,figcaption{
  box-sizing:border-box;
}
ul,ol{padding:0;margin:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
video,img,svg{vertical-align:middle}
button{font-family:inherit;border:0;cursor:pointer;background:none}
input,select,textarea{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700}
p{margin:0}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
:focus-visible{
  outline:3px solid rgba(47,137,255,.35);
  outline-offset:2px;
  border-radius:6px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border-radius:12px;
  font-weight:600;
  font-size:15px;
  line-height:1.2;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,background .2s ease;
  white-space:nowrap;
}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--sky),var(--violet));
  box-shadow:0 10px 24px rgba(70,92,255,.24);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 14px 28px rgba(70,92,255,.32);
}
.btn-primary:active{
  transform:translateY(0);
}
.btn-ghost{
  color:var(--text);
  border:1px solid var(--line);
  background:var(--surface);
  box-shadow:var(--shadow-sm);
}
.btn-ghost:hover{
  border-color:#b9cbdf;
  background:#f8fbff;
  transform:translateY(-2px);
}
.btn-sun{
  color:#fff;
  background:linear-gradient(135deg,#ffac49,#f57c32);
  box-shadow:0 10px 22px rgba(245,124,50,.25);
}
.btn-sun:hover{
  transform:translateY(-2px);
  box-shadow:0 14px 30px rgba(245,124,50,.32);
}
.brand-mark{
  width:36px;height:36px;
  border-radius:11px;
  color:#fff;
  background:linear-gradient(140deg,var(--sky),var(--violet));
  display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 auto;
  box-shadow:0 8px 18px rgba(66,91,255,.22);
}
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(223,232,242,.78);
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-text{
  font-size:18px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--text);
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin:0 auto;
}
.nav-link{
  position:relative;
  padding:10px 15px;
  font-size:15px;
  line-height:1.3;
  color:#35475f;
  border-radius:10px;
  font-weight:500;
  transition:color .2s,background .2s;
}
.nav-link:hover{
  color:var(--sky);
  background:rgba(47,137,255,.07);
}
.nav-link.active{
  color:var(--sky);
  font-weight:600;
}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:15px;right:15px;bottom:3px;
  height:3px;
  border-radius:9px;
  background:linear-gradient(90deg,var(--sky),var(--violet));
}
.header-tools{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.search-mini{
  width:230px;
  height:40px;
  display:flex;
  align-items:center;
  gap:7px;
  padding:0 10px;
  background:#eef3f8;
  border:1px solid transparent;
  border-radius:11px;
  transition:border-color .2s,background .2s,box-shadow .2s;
  color:#7b8da2;
}
.search-mini:focus-within{
  background:#fff;
  border-color:#a9c9ee;
  box-shadow:0 0 0 4px rgba(47,137,255,.09);
}
.search-mini input{
  flex:1;
  background:none;
  border:0;
  outline:0;
  font-size:13px;
  color:var(--text);
  min-width:0;
}
.search-mini input::placeholder{color:#8a9bb0}
.search-mini kbd{
  font-family:inherit;
  font-size:11px;
  border:1px solid #cfdae7;
  background:#fff;
  color:#677991;
  border-radius:5px;
  padding:0px 5px;
  height:20px;
  line-height:18px;
}
.btn-header{
  height:42px;
  padding:0 20px;
  font-size:14px;
}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  align-items:center;
  justify-content:center;
  border-radius:11px;
  border:1px solid var(--line);
  color:var(--text);
}
.nav-toggle svg{width:21px;height:21px}

/* category hero */
.page-main{padding:20px 0 0}
.category-hero{
  margin:18px 0 0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:32px;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  position:relative;
}
.category-hero:before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 88% 20%, rgba(122,92,255,.12), transparent 17rem),
    radial-gradient(circle at 92% 85%, rgba(47,137,255,.06), transparent 16rem);
  pointer-events:none;
  z-index:1;
}
.cat-hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:50px;
  min-height:400px;
  padding:58px 58px 58px;
  align-items:center;
}
.cat-hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  background:linear-gradient(90deg,rgba(47,137,255,.12),rgba(126,108,242,.12));
  color:var(--sky);
  font-size:13px;
  font-weight:600;
}
.cat-hero-eyebrow i{
  width:8px;height:8px;
  border-radius:50%;
  background:var(--sky);
  box-shadow:0 0 0 4px rgba(47,137,255,.14);
  display:inline-block;
}
.category-hero h1{
  font-size:46px;
  line-height:1.2;
  letter-spacing:.01em;
  margin:20px 0 18px;
}
.category-hero h1 span{
  display:block;
  background:linear-gradient(120deg,var(--blue),var(--violet));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  color:#40556e;
  font-size:17px;
  max-width:520px;
  line-height:1.9;
  margin-bottom:26px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  align-items:center;
}
.hero-note{
  margin-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:5px;
  height:28px;
  padding:0 12px;
  background:#f0f5fb;
  border:1px solid #dce7f1;
  border-radius:999px;
  color:#4a617c;
  font-size:12px;
  font-weight:500;
}
.chip i{
  width:6px;height:6px;
  background:#6ebd71;
  border-radius:50%;
}
.hero-media{
  position:relative;
  border-radius:26px;
  overflow:hidden;
  background:linear-gradient(140deg,#edf6ff,#f3eefe);
  border:1px solid #e4ecf5;
  box-shadow:var(--shadow-md);
  min-height:300px;
}
.hero-media img{
  width:100%;
  height:360px;
  object-fit:cover;
}
.hero-media-cover{
  background:linear-gradient(180deg,rgba(29,57,92,.04),rgba(29,57,92,.24));
}
.hero-float{
  position:absolute;
  left:20px;right:20px;bottom:20px;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.9);
  border-radius:18px;
  padding:14px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  box-shadow:0 14px 30px rgba(28,55,97,.14);
}
.hero-float strong{
  font-size:14px;
  display:block;
}
.hero-float small{
  color:var(--muted);
  font-size:12px;
}
.hero-float-tag{
  height:32px;
  padding:0 13px;
  border-radius:999px;
  background:linear-gradient(120deg,var(--sky),var(--violet));
  color:#fff;
  font-size:13px;
  font-weight:600;
  display:flex;align-items:center;
  white-space:nowrap;
}

/* section global */
.segment{
  padding:96px 0;
}
.segment-sm{
  padding:68px 0;
}
.segment-alt{
  background:var(--surface);
}
.section-head{
  max-width:760px;
  margin-bottom:44px;
}
.section-head.center{
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}
.eyebrow-label{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.18em;
  color:var(--sky);
  text-transform:uppercase;
  margin-bottom:12px;
}
.section-head h2{
  font-size:32px;
  letter-spacing:.01em;
  margin-bottom:14px;
}
.section-lead{
  color:var(--muted);
  font-size:16px;
}

/* intro split */
.split-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.split-visual{
  position:relative;
}
.visual-frame{
  position:relative;
  border-radius:28px;
  overflow:hidden;
  padding:18px;
  background:linear-gradient(135deg,#f0f6ff,#f4f0ff);
  border:1px solid #e1eaf4;
  box-shadow:var(--shadow-md);
}
.visual-frame img{
  width:100%;
  height:390px;
  object-fit:cover;
  border-radius:20px;
}
.visual-caption{
  margin-top:14px;
  display:block;
  font-size:12px;
  color:#8598ad;
  padding-left:6px;
}
.split-copy h2{
  font-size:30px;
  margin-bottom:16px;
}
.split-copy p{
  color:#465a73;
  margin:18px 0;
}
.split-list{
  display:grid;
  gap:12px;
  margin-top:26px;
}
.split-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  background:#fff;
  border:1px solid var(--line-soft);
  padding:13px 16px;
  border-radius:14px;
  box-shadow:0 4px 10px rgba(30,60,95,.03);
}
.split-list li b{
  flex:0 0 26px;
  height:26px;
  border-radius:50%;
  background:rgba(47,137,255,.12);
  color:var(--sky);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;
  margin-top:2px;
}
.split-list li div{
  font-size:15px;
}
.split-list li strong{
  display:block;
  font-size:15px;
  color:var(--text);
}
.split-list li p{
  margin:4px 0 0;
  font-size:14px;
  color:#6c7d92;
  line-height:1.6;
}

/* process */
.process-panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:28px;
  box-shadow:var(--shadow-md);
  padding:42px 46px;
}
.step-row{
  display:grid;
  grid-template-columns:78px 1fr;
  gap:16px 28px;
  padding:24px 0;
  border-bottom:1px solid var(--line-soft);
}
.step-row:last-child{
  border-bottom:0;
  padding-bottom:0;
}
.step-num{
  display:flex;
  flex-direction:column;
  align-items:center;
}
.step-num b{
  width:56px;height:56px;
  border-radius:18px;
  background:linear-gradient(140deg,var(--sky),var(--violet));
  color:#fff;
  font-size:18px;
  font-weight:700;
  box-shadow:0 8px 20px rgba(66,90,255,.25);
  display:flex;align-items:center;justify-content:center;
}
.step-num small{
  font-size:12px;
  color:#9aabc0;
  margin-top:8px;
  writing-mode:horizontal-tb;
}
.step-content h3{
  font-size:19px;
  margin:4px 0 8px;
}
.step-content p{
  color:#52677e;
  font-size:15px;
  max-width:640px;
}
.process-grid{
  display:grid;
  grid-template-columns:0.85fr 1.6fr;
  gap:48px;
  align-items:center;
}
.process-aside h2{
  font-size:30px;
  margin-bottom:14px;
}
.process-aside p{
  color:#5b6d84;
  margin-bottom:16px;
}
.process-aside .sec-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(255,164,60,.14);
  color:#b96517;
  font-size:12px;
  font-weight:600;
}

/* entry-kind */
.entry-kind{
  background:linear-gradient(180deg,#eef4fb,#f7f8ff);
}
.kind-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:25px;
  box-shadow:var(--shadow-sm);
  overflow:hidden;
}
.kind-card-grid{
  display:grid;
  grid-template-columns:.9fr 1.15fr;
}
.kind-aside{
  padding:36px 38px;
  border-right:1px solid var(--line-soft);
}
.kind-aside h2{
  font-size:28px;
  margin-bottom:14px;
}
.kind-aside p{
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
  margin-bottom:18px;
}
.kind-status{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.kind-aside .dot-status{
  margin-top:28px;
  padding:14px 16px;
  background:#f0f7ff;
  border-radius:16px;
  color:#3c6182;
  font-size:13px;
}
.kind-aside .dot-status i{
  display:inline-block;
  width:9px;height:9px;
  border-radius:50%;
  margin-right:8px;
  background:#38b168;
  box-shadow:0 0 0 5px rgba(56,177,104,.12);
}
.kind-list{
  padding:34px 40px;
  display:grid;
  gap:14px;
}
.kind-item{
  display:grid;
  grid-template-columns:44px 1fr;
  gap:15px;
  padding:16px 8px 16px 0;
  border-bottom:1px dashed #dbe6f1;
}
.kind-item:last-child{border-bottom:0;padding-bottom:0}
.kind-item-ion{
  width:40px;height:40px;
  border-radius:13px;
  background:rgba(47,137,255,.1);
  color:var(--sky);
  display:flex;align-items:center;justify-content:center;
}
.kind-item ion{
  font-size:18px;
  font-weight:800;
  font-style:normal;
}
.kind-item h3{
  font-size:16px;
  margin:1px 0 6px;
}
.kind-item p{
  color:#637790;
  font-size:14px;
}

/* FAQ */
.faq-layout{
  display:grid;
  grid-template-columns:.58fr 1.42fr;
  gap:56px;
  align-items:start;
}
.faq-aside h2{
  font-size:30px;
  margin-bottom:14px;
}
.faq-aside p{
  color:var(--muted);
  margin-bottom:22px;
}
.faq-callout{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:18px;
  padding:18px 20px;
  box-shadow:var(--shadow-sm);
  color:#455a73;
  font-size:14px;
}
.faq-callout b{
  color:var(--text);
}
.faq-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:24px;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.faq-item{
  border-bottom:1px solid var(--line-soft);
}
.faq-item:last-child{border-bottom:0}
.faq-item summary{
  cursor:pointer;
  list-style:none;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:18px;
  padding:21px 24px;
  font-weight:600;
  font-size:16px;
  transition:background .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{
  background:#f6faff;
}
.faq-item summary .faq-arrow{
  flex:0 0 28px;
  width:28px;height:28px;
  border:1px solid #d8e3ef;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .25s,background .25s,color .25s;
}
.faq-item[open] summary .faq-arrow{
  transform:rotate(135deg);
  background:var(--sky);
  color:#fff;
  border-color:var(--sky);
}
.faq-answer{
  padding:0 24px 20px;
  color:#536a84;
  font-size:15px;
  line-height:1.9;
}

/* related reading */
.related-grid{
  display:grid;
  grid-template-columns:1.4fr .6fr;
  gap:32px;
}
.related-cards{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:22px;
}
.related-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:22px;
  overflow:hidden;
  transition:transform .25s,box-shadow .25s,border-color .25s;
}
.related-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lift);
  border-color:#c5d7eb;
}
.related-card img{
  width:100%;
  height:180px;
  object-fit:cover;
  border-bottom:1px solid var(--line-soft);
}
.related-body{
  padding:20px;
}
.related-tag{
  font-size:12px;
  display:inline-block;
  background:rgba(47,137,255,.1);
  color:var(--sky);
  border-radius:999px;
  padding:4px 10px;
  font-weight:600;
}
.related-body h3{
  font-size:18px;
  line-height:1.45;
  margin:12px 0 8px;
}
.related-body p{
  color:#63778e;
  font-size:14px;
}
.related-entry{
  background:linear-gradient(150deg,#eaf3ff,#f1edff);
  border:1px solid #d9e6f5;
  border-radius:22px;
  padding:30px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.related-entry h3{
  font-size:22px;
  margin-bottom:12px;
}
.related-entry p{
  color:#536a83;
  font-size:14px;
  margin-bottom:20px;
}
.related-entry .btn{
  align-self:flex-start;
}

/* pre-footer */
.pre-cta{
  background:none;
  padding:40px 0 100px;
}
.pre-cta-panel{
  background:linear-gradient(120deg,#173e6c,#3c499f 52%,#6754c1);
  border-radius:30px;
  color:#fff;
  overflow:hidden;
  position:relative;
}
.pre-cta-panel:before{
  content:"";
  position:absolute;
  width:390px;height:390px;
  right:-90px;top:-160px;
  background:radial-gradient(circle,rgba(255,255,255,.26),transparent 65%);
}
.pre-cta-panel:after{
  content:"";
  position:absolute;
  width:260px;height:260px;
  left:20px;bottom:-190px;
  background:radial-gradient(circle,rgba(244,166,67,.35),transparent 65%);
}
.cta-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:20px;
  align-items:center;
  padding:50px;
}
.cta-inner h2{
  font-size:35px;
  line-height:1.35;
}
.cta-inner .cta-title-span{
  color:#ffd7a3;
}
.cta-inner p{
  color:rgba(255,255,255,.9);
  margin-top:13px;
  font-size:16px;
  max-width:580px;
  line-height:1.85;
}
.cta-inner .cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}
.btn-cta-white{
  background:linear-gradient(135deg,#ffac41,#fa8b30);
}
.btn-cta-ghost{
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.45);
  color:#fff;
}
.btn-cta-ghost:hover{
  background:rgba(255,255,255,.2);
  transform:translateY(-2px);
}

/* footer */
.footer{
  margin-top:10px;
  padding:72px 0 30px;
  background:#0d1e33;
  color:#b9c8d9;
}
.footer .container{
  position:relative;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr .72fr .72fr 1.2fr;
  gap:44px;
  padding-bottom:44px;
  border-bottom:1px solid #263e59;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-size:18px;
  font-weight:700;
}
.footer-brand svg{
  width:30px;height:30px;
  border-radius:10px;
  background:linear-gradient(140deg,var(--sky),var(--violet));
  padding:6px;
}
.footer-desc{
  margin-top:18px;
  font-size:14px;
  line-height:1.9;
  color:#9eb0c3;
  max-width:330px;
}
.footer-tags{
  display:flex;
  gap:8px;
  margin-top:16px;
  flex-wrap:wrap;
}
.footer-tag{
  display:inline-block;
  padding:4px 12px;
  border:1px solid rgba(255,255,255,.15);
  border-radius:999px;
  font-size:12px;
  color:#cedbec;
}
.footer-title{
  color:#fff;
  font-size:16px;
  font-weight:600;
  margin-bottom:18px;
}
.footer-list{
  display:grid;
  gap:10px;
}
.footer-list a{
  font-size:14px;
  color:#aebdd0;
  transition:color .2s,padding-left .2s;
}
.footer-list a:hover{
  color:#fff;
  padding-left:5px;
}
.footer-note{
  font-size:14px;
  line-height:1.9;
}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  padding-top:24px;
  font-size:13px;
  color:#7f93ab;
}

@media (max-width:1100px){
  .header-inner{gap:15px}
  .search-mini{width:190px}
  .category-hero h1{font-size:40px}
  .cat-hero-inner{padding:44px 36px;gap:34px}
}
@media (max-width:960px){
  .main-nav{
    position:fixed;
    top:0;left:0;right:0;bottom:0;
    background:rgba(255,255,255,.98);
    backdrop-filter:blur(10px);
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:14px;
    transition:opacity .25s,visibility .25s;
    opacity:0;
    visibility:hidden;
    z-index:200;
  }
  .site-header.nav-open .main-nav{
    opacity:1;
    visibility:visible;
  }
  .nav-link{
    font-size:22px;
    padding:13px 24px;
  }
  .nav-toggle{
    display:inline-flex;
  }
  .header-tools{
    margin-left:auto;
  }
  .search-mini{display:none}
  .cat-hero-inner,
  .split-grid,
  .process-grid,
  .kind-card-grid,
  .faq-layout,
  .cta-inner{
    grid-template-columns:1fr;
  }
  .cat-hero-inner{min-height:0}
  .category-hero h1{font-size:38px}
  .hero-media img{height:300px}
  .process-aside p{margin-top:6px}
  .process-grid{gap:34px}
  .kind-aside{border-right:0;border-bottom:1px solid var(--line-soft)}
  .faq-list{margin-top:8px}
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
  .related-grid{
    grid-template-columns:1fr;
  }
}
@media (max-width:760px){
  .container{
    padding-left:18px;
    padding-right:18px;
  }
  .header-inner{
    height:64px;
    gap:12px;
  }
  .brand-text{
    font-size:15px;
  }
  .brand-mark{
    width:32px;height:32px;
    border-radius:9px;
  }
  .btn-header{
    width:42px;
    padding:0;
    font-size:0;
  }
  .btn-header:after{
    content:"进入";
    font-size:13px;
  }
  .btn-header svg{display:none}
  .main-nav .btn-primary{
    font-size:0;
    width:auto;
  }
  .category-hero h1{
    font-size:30px;
  }
  .cat-hero-inner{
    padding:34px 4px;
  }
  .hero-lead{
    font-size:15px;
    line-height:1.8;
  }
  .segment{
    padding:60px 0;
  }
  .section-head h2,.split-copy h2,.faq-aside h2,.process-aside h2{
    font-size:25px;
  }
  .section-lead{
    font-size:15px;
  }
  .hero-actions .btn{
    width:100%;
  }
  .step-row{
    grid-template-columns:58px 1fr;
    gap:0 14px;
    padding:22px 0;
  }
  .process-panel{
    padding:26px 22px;
  }
  .step-num b{
    width:46px;height:46px;
    border-radius:14px;
    font-size:16px;
  }
  .faq-item summary{
    padding:18px 18px;
    font-size:15px;
  }
  .faq-answer{
    padding:0 18px 18px;
  }
  .related-cards{
    grid-template-columns:1fr;
  }
  .cta-inner{
    padding:34px 26px;
  }
  .cta-inner h2{
    font-size:27px;
  }
  .cta-actions .btn{
    width:100%;
  }
  .split-visual .visual-frame img{
    height:230px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
  }
  .footer-bottom{
    justify-content:center;
    text-align:center;
  }
  .hero-float{
    position:static;
    margin-top:-1px;
  }
  .hero-media{
    background:none;
    border:0;
    padding:0;
    box-shadow:none;
    min-height:0;
  }
  .hero-media img{
    display:none;
  }
  .hero-media{
    position:relative;
    display:flex;
    min-height:240px;
    border-radius:26px;
    overflow:hidden;
  }
  .hero-media:before{
    content:"";
    position:absolute;inset:0;
    background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    opacity:.4;
  }
  .hero-float{
    margin:auto 16px 16px;
    z-index:2;
  }
}
@media (max-width:420px){
  .header-inner{
    flex-wrap:nowrap;
  }
  .main-nav{
    padding-left:18px;padding-right:18px;
  }
  .footer-list{
    grid-template-columns:1fr;
  }
  .btn-header{
    padding:0 10px;
  }
  .btn-header:after{
    font-size:13px;
  }
}

/* roulang page: category2 */
:root {
    --primary: #2e97d8;
    --primary-deep: #1f6fb0;
    --violet: #7c6de8;
    --sky-light: #e9f7ff;
    --accent: #f59e28;
    --accent-soft: #fff4dc;
    --bg: #f5f9fc;
    --card: #fff;
    --ink: #1b2637;
    --muted: #617087;
    --line: rgba(27, 38, 55, 0.08);
    --line-strong: rgba(27, 38, 55, 0.14);
    --radius-lg: 26px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --shadow-soft: 0 6px 28px rgba(37, 91, 138, 0.08);
    --shadow-float: 0 18px 42px rgba(36, 76, 132, 0.14);
    --gutter: clamp(20px, 5vw, 64px);
    --container: 1200px;
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  body,
  p,
  h1,
  h2,
  h3,
  ul,
  ol,
  figure {
    margin: 0;
    padding: 0;
  }

  img {
    display: block;
    max-width: 100%;
  }

  a {
    text-decoration: none;
    color: inherit;
  }

  button,
  input,
  select,
  textarea {
    font: inherit;
  }

  input,
  select,
  textarea {
    outline: none;
  }

  .container {
    width: min(var(--container), 100% - var(--gutter));
    margin-inline: auto;
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(102, 126, 167, 0.18);
    box-shadow: 0 6px 14px rgba(69, 94, 172, 0.06);
    color: var(--primary-deep);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.4px;
  }

  .eyebrow-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), var(--violet));
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: var(--radius-sm);
    height: 44px;
    padding: 0 22px;
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    transition: all .24s ease;
    cursor: pointer;
    border: 1px solid transparent;
    box-shadow: 0 6px 16px rgba(30, 101, 165, 0.12);
  }

  .btn-primary {
    background: linear-gradient(135deg, #36b1f0, #6e6ee8);
    color: #fff;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    background: linear-gradient(135deg, #2089d2, #5b58d6);
    box-shadow: 0 12px 22px rgba(42, 105, 193, 0.2);
  }

  .btn-secondary {
    background: transparent;
    color: var(--primary-deep);
    border-color: rgba(45, 151, 216, 0.45);
    box-shadow: none;
  }

  .btn-secondary:hover {
    border-color: var(--primary);
    background: rgba(46, 151, 216, 0.08);
  }

  .btn-ghost {
    background: rgba(255, 255, 255, 0.72);
    color: var(--primary-deep);
    border: 1px solid rgba(46, 151, 216, 0.26);
    box-shadow: none;
  }

  .btn-lg {
    height: 52px;
    padding: 0 28px;
    font-size: 16px;
  }

  .btn:focus-visible,
  .footer a:focus-visible,
  .nav-link:focus-visible,
  .faq-summary:focus-visible {
    outline: 3px solid rgba(46, 151, 216, 0.36);
    outline-offset: 3px;
  }

  .text-accent {
    color: var(--accent);
  }

  .hidden-xs {
    display: inline-flex;
  }

  .section {
    padding: 88px 0;
  }

  .section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 38px;
  }

  .section-header.with-line {
    border-bottom: 1px solid var(--line);
    padding-bottom: 26px;
  }

  .section-title {
    font-size: 30px;
    line-height: 1.3;
    font-weight: 700;
    color: var(--ink);
  }

  .section-title small {
    display: block;
    margin-top: 8px;
    font-size: 14px;
    font-weight: 400;
    color: var(--muted);
    max-width: 560px;
  }

  .section-more {
    flex-shrink: 0;
  }

  /* Header */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    border-bottom: 1px solid rgba(24, 38, 66, 0.06);
    background: rgba(255, 255, 255, 0.84);
    backdrop-filter: blur(14px);
  }

  .header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    gap: 24px;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    color: var(--ink);
    font-weight: 700;
    font-size: 17px;
    white-space: nowrap;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    flex: none;
    border-radius: 12px;
    display: grid;
    place-items: center;
    color: #fff;
    background: linear-gradient(135deg, #38b3f1, #7870ec);
    box-shadow: 0 8px 18px rgba(55, 119, 197, 0.22);
  }

  .brand-text {
    letter-spacing: 0.1px;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0 auto;
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 15px;
    color: var(--muted);
    font-weight: 500;
    transition: color .2s ease, background .2s ease;
  }

  .nav-link:hover {
    color: var(--primary-deep);
    background: rgba(46, 151, 216, 0.06);
  }

  .nav-link.active {
    color: var(--primary-deep);
    font-weight: 600;
    background: rgba(46, 151, 216, 0.1);
  }

  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 3px;
    width: 5px;
    height: 5px;
    border-radius: 999px;
    background: var(--accent);
    transform: translateX(-50%);
  }

  .header-tools {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
  }

  .search-mini {
    display: flex;
    align-items: center;
    gap: 7px;
    background: rgba(231, 241, 248, 0.68);
    border: 1px solid rgba(102, 126, 167, 0.1);
    border-radius: 999px;
    height: 38px;
    padding: 0 12px;
    color: var(--muted);
    width: 220px;
    transition: all .2s ease;
  }

  .search-mini:focus-within {
    border-color: rgba(46, 151, 216, 0.48);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(46, 151, 216, 0.09);
  }

  .search-mini input {
    min-width: 0;
    border: 0;
    background: transparent;
    height: 100%;
    width: 100%;
    font-size: 13px;
    color: var(--ink);
  }

  .search-mini input::placeholder {
    color: #9ba8bd;
  }

  .search-mini kbd {
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(120, 136, 170, 0.18);
    border-radius: 6px;
    padding: 2px 7px;
    font-size: 11px;
    color: #718dae;
  }

  .nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--line-strong);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    color: var(--ink);
    cursor: pointer;
    transition: all .2s ease;
  }

  .nav-toggle svg {
    width: 20px;
    height: 20px;
  }

  /* Banner category */
  .breadcrumbs {
    margin-top: 22px;
    font-size: 13px;
    color: var(--muted);
  }

  .breadcrumbs a {
    color: var(--primary-deep);
    transition: color .2s;
  }

  .breadcrumbs a:hover {
    color: var(--accent);
  }

  .cat-banner {
    position: relative;
    background:
      radial-gradient(circle at 12% 28%, rgba(129, 220, 255, 0.16), transparent 22%),
      radial-gradient(circle at 85% 14%, rgba(109, 106, 232, 0.14), transparent 24%),
      linear-gradient(135deg, #e5f6ff, #f3f4ff 46%, #fff7eb);
    border-bottom: 1px solid var(--line);
    overflow: hidden;
    padding: 58px 0 58px;
  }

  .cat-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-position: right center;
    background-size: cover;
    opacity: 0.16;
    pointer-events: none;
    z-index: 0;
  }

  .cat-banner .container {
    position: relative;
    z-index: 2;
  }

  .cat-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
    align-items: center;
    gap: 44px;
  }

  .banner-copy h1 {
    font-size: clamp(30px, 5vw, 46px);
    line-height: 1.25;
    font-weight: 700;
    margin: 18px 0 16px;
    color: var(--ink);
    max-width: 720px;
    letter-spacing: -0.2px;
  }

  .banner-desc {
    max-width: 660px;
    font-size: 16px;
    color: #5a6b86;
    margin-bottom: 28px;
    line-height: 1.9;
  }

  .banner-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 24px;
  }

  .banner-note {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .banner-note span {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(33, 119, 182, 0.14);
    color: #42658a;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 12px;
    box-shadow: 0 3px 8px rgba(46, 151, 216, 0.05);
  }

  .banner-deco {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .banner-deco-shell {
    position: relative;
    width: 340px;
    max-width: 100%;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: 0 34px 58px rgba(74, 100, 171, 0.16);
    border: 6px solid rgba(255, 255, 255, 0.7);
  }

  .banner-deco-shell img {
    width: 100%;
    height: 290px;
    object-fit: cover;
  }

  .banner-datainner {
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 18px;
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(12px);
    border-radius: 18px;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    border: 1px solid rgba(255, 255, 255, 0.7);
  }

  .banner-datainner .cover-icon {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--violet));
    color: #fff;
    display: grid;
    place-items: center;
    flex: none;
  }

  .banner-datainner b {
    display: block;
    color: var(--ink);
    font-size: 17px;
    line-height: 1.2;
  }

  .banner-datainner span {
    display: block;
    font-size: 12px;
    color: var(--muted);
    margin-top: 4px;
  }

  /* Category intro card */
  .intro-card-region {
    padding: 70px 0 8px;
  }

  .intro-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 40px 46px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
  }

  .intro-card::after {
    content: "";
    position: absolute;
    right: -40px;
    top: -40px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(129, 212, 253, 0.18), transparent 66%);
    pointer-events: none;
  }

  .intro-flex {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 42px;
    align-items: center;
    position: relative;
    z-index: 2;
  }

  .intro-flex .lead {
    margin-bottom: 14px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.9;
  }

  .intro-flex h2 {
    font-size: 25px;
    margin-bottom: 12px;
    line-height: 1.45;
  }

  .intro-flex .link-more {
    display: inline-flex;
    align-items: center;
    color: var(--primary-deep);
    font-weight: 600;
    margin-top: 12px;
  }

  .intro-badges {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .intro-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg);
    border: 1px solid rgba(46, 151, 216, 0.1);
    padding: 12px 16px;
    border-radius: 14px;
  }

  .intro-badge b {
    font-size: 22px;
    color: var(--primary-deep);
    font-weight: 700;
  }

  .intro-badge span {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.35;
  }

  .intro-badge svg {
    color: var(--primary);
  }

  /* service overview */
  .service-overview {
    background: #fff;
    border-block: 1px solid var(--line);
    padding: 88px 0;
  }

  .overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    margin-top: 24px;
  }

  .overview-item {
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 29px 28px;
    transition: transform .26s ease, box-shadow .26s ease, border-color .26s ease;
  }

  .overview-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-soft);
    border-color: rgba(46, 151, 216, 0.26);
  }

  .overview-item.dark-panel {
    background: linear-gradient(145deg, #203d69, #7c6de8);
    border-color: transparent;
    color: #fff;
  }

  .overview-item.dark-panel p,
  .overview-item.dark-panel .meta-label {
    color: rgba(255, 255, 255, 0.78);
  }

  .overview-item.dark-panel .service-num {
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
  }

  .overview-item .item-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 26px;
  }

  .overview-icon {
    width: 46px;
    height: 46px;
    border-radius: 15px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #d7f6ff, #ebe6ff);
    color: var(--primary-deep);
    font-size: 20px;
  }

  .dark-panel .overview-icon {
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
  }

  .service-num {
    font-size: 13px;
    color: var(--primary-deep);
    border: 1px solid rgba(46, 151, 216, 0.15);
    background: rgba(255, 255, 255, 0.63);
    padding: 3px 10px;
    border-radius: 999px;
  }

  .overview-item h3 {
    font-size: 19px;
    margin-bottom: 10px;
    line-height: 1.5;
  }

  .overview-item p {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.8;
  }

  .overview-item .link-arrow {
    margin-top: 20px;
    color: inherit;
    font-weight: 600;
    opacity: 0.8;
    display: inline-flex;
    align-items: center;
    gap: 5px;
  }

  /* flow split */
  .flow-area {
    padding: 78px 0;
  }

  .flow-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 0.95fr;
    gap: 52px;
    align-items: center;
  }

  .flow-visual {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--line);
  }

  .flow-visual img {
    width: 100%;
    height: 390px;
    object-fit: cover;
  }

  .flow-visual .photo-shade {
    position: absolute;
    inset: 0;
    background: linear-gradient(190deg, rgba(43, 98, 150, 0.03), rgba(21, 39, 88, 0.42));
  }

  .flow-visual .shade-label {
    position: absolute;
    left: 18px;
    bottom: 18px;
    background: rgba(31, 49, 87, 0.68);
    color: #fff;
    backdrop-filter: blur(8px);
    padding: 10px 16px;
    font-size: 13px;
    border-radius: 999px;
  }

  .flow-copy {
    padding-right: 8px;
  }

  .step-list {
    display: grid;
    gap: 10px;
    margin-top: 20px;
  }

  .step-item {
    display: flex;
    gap: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 18px 20px;
    transition: border-color .22s ease;
  }

  .step-item:hover {
    border-color: var(--primary);
  }

  .step-index {
    flex: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--violet));
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 13px;
    font-weight: 600;
  }

  .step-body h4 {
    font-size: 15px;
    margin-bottom: 3px;
  }

  .step-body p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.7;
  }

  /* big center card */
  .grand-card {
    background: linear-gradient(135deg, #f0f9fe, #f7f4ff);
    padding: 76px 0;
  }

  .grand-card-inner {
    background: #fff;
    max-width: 960px;
    margin: 0 auto;
    border-radius: 46px;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-float);
    text-align: center;
    padding: 50px 48px;
    background-image: linear-gradient(120deg, #ffffff 20%, #fdfdff 100%);
  }

  .grand-card-inner h2 {
    font-size: 27px;
    line-height: 1.5;
    margin-bottom: 14px;
  }

  .grand-card-inner .fine-text {
    color: var(--muted);
    font-size: 16px;
    line-height: 2;
    max-width: 720px;
    margin: 0 auto;
  }

  .grand-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-top: 26px;
  }

  .number-strip {
    display: flex;
    justify-content: center;
    border-top: 1px solid var(--line);
    margin-top: 36px;
    padding-top: 24px;
    gap: 22px;
    flex-wrap: wrap;
  }

  .number-strip .data {
    min-width: 130px;
    padding: 12px 8px;
    background: var(--bg);
    border-radius: 18px;
  }

  .number-strip b {
    font-size: 24px;
    color: var(--primary-deep);
    display: block;
  }

  .number-strip span {
    font-size: 12px;
    color: var(--muted);
  }

  /* testimonials/references as pieces */
  .reference-area {
    padding: 76px 0;
    background: #fff;
  }

  .reference-grid {
    display: grid;
    grid-template-columns: 194px 1fr;
    gap: 22px;
  }

  .reference-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 26px;
    border: 1px solid var(--line);
  }

  .reference-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 16px;
  }

  .reference-card .tag-mini {
    color: var(--primary-deep);
    background: rgba(46, 151, 216, 0.1);
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 999px;
    display: inline-flex;
    margin-bottom: 8px;
  }

  .reference-card h3 {
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 8px;
  }

  .reference-card p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.75;
  }

  .reference-card .ref-link {
    display: inline-flex;
    gap: 5px;
    align-items: center;
    margin-top: 12px;
    color: var(--primary-deep);
    font-size: 14px;
    font-weight: 500;
  }

  /* faq */
  .faq-section {
    background: linear-gradient(180deg, #f5faff, #faf6ff);
    padding: 86px 0;
  }

  .faq-grid {
    display: grid;
    grid-template-columns: minmax(260px, 0.62fr) 1.4fr;
    gap: 40px;
    align-items: start;
  }

  .faq-heading .section-title {
    margin-top: 16px;
    font-size: 30px;
  }

  .faq-heading p {
    color: var(--muted);
    margin: 14px 0;
    font-size: 15px;
  }

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 5px 18px rgba(41, 96, 155, 0.05);
    transition: border-color .2s ease;
  }

  .faq-item[open] {
    border-color: rgba(46, 151, 216, 0.34);
  }

  .faq-summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 19px 22px;
    font-weight: 600;
    font-size: 15px;
    transition: background .18s ease;
  }

  .faq-summary::-webkit-details-marker {
    display: none;
  }

  .faq-summary:hover {
    background: rgba(46, 151, 216, 0.04);
  }

  .faq-summary .faq-arrow {
    flex: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--bg);
    display: grid;
    place-items: center;
    color: var(--primary);
    transition: all .25s ease;
  }

  .faq-item[open] .faq-arrow {
    background: linear-gradient(135deg, var(--primary), var(--violet));
    color: #fff;
    transform: rotate(180deg);
  }

  .faq-item[open] .faq-arrow svg {
    transform: rotate(-45deg);
  }

  .faq-body {
    padding: 0 24px 22px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.85;
  }

  .faq-arrow svg {
    width: 14px;
    height: 14px;
    transition: transform .2s ease;
  }

  /* after faq CTA */
  .cta-line {
    background: linear-gradient(135deg, #2587b8, #6559d8);
    overflow: hidden;
    border-radius: 34px;
    padding: 52px 50px;
    color: #fff;
    position: relative;
  }

  .cta-line::before {
    content: "";
    position: absolute;
    width: 300px;
    height: 300px;
    right: -70px;
    top: -120px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 50%;
  }

  .cta-line .cta-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
  }

  .cta-line h2 {
    font-size: clamp(22px, 3vw, 32px);
    line-height: 1.45;
    margin-bottom: 10px;
  }

  .cta-line p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.83);
    max-width: 640px;
  }

  .cta-line .btn {
    flex: none;
    background: #fff;
    color: #3d4bc2;
    box-shadow: none;
  }

  .cta-line .btn:hover {
    background: #f5f4ff;
    color: #1f2a9d;
  }

  /* footer */
  .footer {
    background: #fff;
    border-top: 1px solid var(--line);
    margin-top: 0;
    padding: 54px 0 28px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.9fr 0.9fr 1.17fr;
    gap: 40px;
  }

  .footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-size: 20px;
    color: var(--ink);
    font-weight: 700;
  }

  .footer-brand svg {
    width: 28px;
    height: 28px;
    color: #fff;
    background: linear-gradient(135deg, #36b5f2, #796cee);
    padding: 6px;
    border-radius: 10px;
    box-shadow: 0 8px 16px rgba(54, 120, 210, 0.16);
  }

  .footer-desc {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.9;
    margin: 14px 0 14px;
    max-width: 330px;
  }

  .footer-tag {
    background: var(--bg);
    border: 1px solid var(--line);
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    color: var(--muted);
    margin-right: 6px;
    display: inline-block;
  }

  .footer-title {
    color: var(--ink);
    font-size: 16px;
    margin-bottom: 16px;
    font-weight: 600;
  }

  .footer-list {
    list-style: none;
    display: grid;
    gap: 10px;
  }

  .footer-list a {
    color: var(--muted);
    font-size: 14px;
    transition: color .2s ease;
  }

  .footer-list a:hover {
    color: var(--primary-deep);
  }

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    border-top: 1px solid var(--line);
    padding-top: 20px;
    margin-top: 40px;
    color: #8d9bb0;
    font-size: 13px;
  }

  .footer-bottom p {
    line-height: 1.6;
  }

  /* simple responsive */
  @media (max-width: 1080px) {
    .header-inner {
      flex-wrap: wrap;
      gap: 14px;
    }

    .search-mini {
      display: none;
    }

    .main-nav {
      order: 3;
      width: 100%;
      overflow-x: auto;
      padding-bottom: 8px;
    }

    .header-tools {
      margin-left: auto;
    }

    .cat-hero-grid {
      grid-template-columns: 1fr;
    }

    .banner-deco {
      display: none;
    }

    .reference-grid {
      grid-template-columns: 1fr;
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
  }

  @media (max-width: 860px) {
    .section {
      padding: 64px 0;
    }

    .intro-flex,
    .flow-wrap,
    .faq-grid {
      grid-template-columns: 1fr;
    }

    .faq-grid {
      gap: 24px;
    }

    .grand-card-inner {
      padding: 42px 24px;
    }

    .cta-line {
      padding: 34px 20px;
    }

    .cta-inner {
      flex-direction: column;
      align-items: flex-start !important;
    }

    .overview-grid {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 640px) {
    .container {
      --gutter: 18px;
    }

    .section-header {
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .btn-header {
      display: none;
    }

    .nav-toggle {
      display: inline-flex;
    }

    .main-nav {
      display: none;
    }

    .main-nav.is-open {
      display: flex;
      flex-direction: column;
      align-items: stretch;
      background: rgba(255, 255, 255, 0.96);
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 14px;
      z-index: 20;
    }

    .header-inner {
      position: relative;
    }

    .nav-link.active::after {
      display: none;
    }

    .cat-banner {
      padding: 42px 0 50px;
    }

    .banner-copy h1 {
      font-size: 30px;
    }

    .eyebrow {
      font-size: 11px;
      padding: 7px 11px;
    }

    .overview-item {
      padding: 24px 18px;
    }

    .grand-card-inner {
      border-radius: 22px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 26px;
    }

    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }

    .intro-card {
      padding: 28px 18px;
    }

    .intro-flex h2 {
      font-size: 21px;
    }

    .grand-card-inner h2 {
      font-size: 22px;
    }

    .reference-card {
      padding: 18px;
    }
  }