/* roulang page: index */
:root{
  --c-primary:#1966CC;
  --c-primary-deep:#12539F;
  --c-primary-soft:#EAF2FD;
  --c-accent:#DE7420;
  --c-ink:#16202B;
  --c-body:#55616E;
  --c-muted:#8A96A3;
  --c-line:#E4E9F0;
  --c-bg:#F7F9FC;
  --c-card:#FFFFFF;
  --c-dark:#0E1A28;
  --r-card:14px;
  --r-btn:10px;
  --shadow-card:0 1px 2px rgba(16,24,40,.04), 0 10px 28px -14px rgba(16,24,40,.16);
  --shadow-hover:0 16px 36px -16px rgba(16,24,40,.22);
  --ease:220ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;}
h1{font-size:clamp(28px,4.2vw,42px);line-height:1.28;letter-spacing:-.01em;}
h2{font-size:clamp(23px,2.7vw,30px);line-height:1.35;letter-spacing:-.01em;}
h3{font-size:19px;font-weight:600;line-height:1.5;}
p{margin:0;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){ .container{padding:0 32px;} }
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:8px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid var(--c-line);
  backdrop-filter:saturate(180%) blur(8px);
}
.nav-inner{display:flex;align-items:center;gap:18px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:32px;height:32px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(135deg,#1966CC 0%,#2E8BF0 100%);
  color:#fff;font-size:15px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px -8px rgba(25,102,204,.9);
}
.brand-text{font-size:16px;font-weight:700;color:var(--c-ink);letter-spacing:-.01em;white-space:nowrap;}
.nav-links{display:none;align-items:center;gap:2px;margin-left:10px;}
.nav-links a{
  position:relative;padding:8px 12px;border-radius:8px;
  font-size:15px;font-weight:500;color:#3C4A59;
  transition:color var(--ease), background var(--ease);
  white-space:nowrap;
}
.nav-links a:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-links a.active{color:var(--c-primary);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  border-radius:2px;background:var(--c-primary);
}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px;}
.nav-search{
  display:none;align-items:center;gap:8px;
  height:40px;width:172px;padding:0 12px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-btn);
  transition:border-color var(--ease), box-shadow var(--ease);
}
.nav-search:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(25,102,204,.12);}
.nav-search i{font-size:13px;color:var(--c-muted);}
.nav-search input{width:100%;border:0;outline:0;background:transparent;font-size:14px;}
.nav-search input::placeholder{color:#A6B1BD;}
.nav-toggle{
  display:flex;align-items:center;justify-content:center;
  width:40px;height:40px;border:1px solid var(--c-line);border-radius:var(--r-btn);
  background:#fff;color:var(--c-ink);cursor:pointer;transition:all var(--ease);
}
.nav-toggle:hover{border-color:#CFE0F7;background:var(--c-primary-soft);color:var(--c-primary);}
@media (min-width:1024px){
  .nav-links{display:flex;}
  .nav-search{display:flex;}
  .nav-toggle{display:none;}
}
.mobile-drawer{display:none;border-top:1px solid var(--c-line);background:#fff;}
.mobile-drawer.open{display:block;}
.mobile-drawer .drawer-inner{padding:12px 0 18px;}
.mobile-drawer a{
  display:block;padding:12px 4px;font-size:15px;font-weight:500;color:#3C4A59;
  border-bottom:1px solid var(--c-line);
}
.mobile-drawer a.active{color:var(--c-primary);font-weight:600;}
.mobile-drawer .drawer-cta{margin-top:16px;display:grid;gap:10px;}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background var(--ease), color var(--ease), transform var(--ease), box-shadow var(--ease), gap var(--ease);
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 22px -12px rgba(25,102,204,.95);}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-2px);box-shadow:0 16px 28px -14px rgba(25,102,204,.95);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:#fff;border-color:#BBD3F1;color:var(--c-primary);}
.btn-outline:hover{background:var(--c-primary-soft);border-color:var(--c-primary);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--c-primary);padding:8px 0;font-weight:600;}
.btn-ghost:hover{gap:14px;color:var(--c-primary-deep);}
.btn-block{width:100%;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:13px;font-weight:600;letter-spacing:.04em;
}
.eyebrow-dark{background:rgba(46,139,240,.16);color:#7FB6F5;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:12.5px;font-weight:600;line-height:1.6;
}
.section{padding:52px 0;}
@media (min-width:1024px){ .section{padding:88px 0;} }
.section-head{max-width:760px;margin-bottom:32px;}
.section-head h2{margin-top:16px;}
.section-head p{margin-top:12px;font-size:16px;color:var(--c-body);}
.card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#CFE0F7;}
.link-arrow{display:inline-flex;align-items:center;gap:8px;color:var(--c-primary);font-size:14.5px;font-weight:600;}
.link-arrow i{transition:transform var(--ease);}
.link-arrow:hover i{transform:translateX(4px);}

/* ---------- Hero ---------- */
.hero{
  padding:36px 0 52px;
  background:
    radial-gradient(1000px 420px at 84% -12%, #E2EEFC 0%, rgba(247,249,252,0) 72%),
    var(--c-bg);
}
@media (min-width:1024px){ .hero{padding:64px 0 88px;} }
.hero-grid{display:grid;gap:36px;}
@media (min-width:1024px){ .hero-grid{grid-template-columns:1fr 1fr;gap:52px;align-items:center;} }
.hero h1{margin-top:18px;}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.85;color:var(--c-body);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
@media (max-width:520px){ .hero-actions .btn{width:100%;} }
.trust-bar{
  display:flex;flex-wrap:wrap;gap:12px 26px;
  margin-top:30px;padding-top:22px;border-top:1px solid var(--c-line);
}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--c-body);font-weight:500;}
.trust-item i{color:var(--c-primary);font-size:14px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:18px;
  border:1px solid var(--c-line);box-shadow:var(--shadow-hover);
}
.hero-float{
  position:absolute;right:12px;bottom:12px;
  background:#fff;border:1px solid var(--c-line);border-radius:14px;
  padding:13px 17px;box-shadow:0 14px 30px -14px rgba(16,24,40,.35);
  display:flex;flex-direction:column;gap:2px;max-width:230px;
}
.hero-float-label{font-size:12.5px;color:var(--c-muted);}
.hero-float strong{font-size:15px;color:var(--c-ink);font-weight:700;}
.hero-float-sub{font-size:12.5px;color:var(--c-primary);font-weight:600;}

/* ---------- 三步上手 ---------- */
.steps{display:grid;gap:30px;}
@media (min-width:1024px){ .steps{grid-template-columns:repeat(3,1fr);gap:36px;} }
.step{position:relative;display:flex;gap:16px;align-items:flex-start;}
.step-num{
  flex:0 0 56px;width:56px;height:56px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:21px;font-weight:800;display:flex;align-items:center;justify-content:center;
  position:relative;z-index:1;
}
.step h3{margin-bottom:6px;}
.step p{font-size:15px;line-height:1.75;}
@media (min-width:1024px){
  .step:not(:last-child)::after{
    content:"";position:absolute;top:28px;left:72px;right:-26px;height:2px;
    background-image:linear-gradient(to right,#CADCF3 50%,transparent 0);
    background-size:12px 2px;background-repeat:repeat-x;
  }
}

/* ---------- 分类入口卡 ---------- */
.cat-card{display:flex;flex-direction:column;overflow:hidden;height:100%;}
.cat-cover{aspect-ratio:16/9;overflow:hidden;border-radius:var(--r-card) var(--r-card) 0 0;background:#EDF3FB;}
.cat-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.cat-card:hover .cat-cover img{transform:scale(1.04);}
.cat-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.cat-body h3{font-size:19px;}
.cat-body p{font-size:14.8px;line-height:1.75;color:var(--c-body);}
.cat-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:2px;}
.cat-tags span{font-size:12.5px;color:var(--c-muted);background:#F3F6FA;border:1px solid var(--c-line);padding:3px 10px;border-radius:999px;}
.cat-foot{margin-top:auto;padding-top:14px;}

/* ---------- 数据面板 ---------- */
.stat-panel{
  position:relative;overflow:hidden;
  background:linear-gradient(160deg,#0E1A28 0%,#122A42 62%,#12304B 100%);
  border-radius:20px;padding:38px 26px;color:#B9C8D8;
}
@media (min-width:1024px){ .stat-panel{padding:56px 52px;} }
.stat-panel::after{
  content:"";position:absolute;top:-130px;right:-90px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(46,139,240,.42),rgba(46,139,240,0) 70%);
  pointer-events:none;
}
.stat-head{position:relative;z-index:1;max-width:660px;}
.stat-head h2{color:#fff;margin-top:16px;}
.stat-head p{margin-top:12px;font-size:15.5px;color:#A8B9CB;line-height:1.8;}
.stat-grid{
  position:relative;z-index:1;
  display:grid;gap:22px;margin-top:34px;
  padding-top:30px;border-top:1px solid rgba(255,255,255,.1);
}
@media (min-width:640px){ .stat-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .stat-grid{grid-template-columns:repeat(4,1fr);gap:28px;} }
.stat-num{
  font-size:clamp(28px,3.4vw,38px);font-weight:800;line-height:1.1;color:#fff;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.stat-num.accent{color:#FF9A4D;}
.stat-label{margin-top:8px;font-size:14px;color:#9DB0C4;}

/* ---------- 场景证明 ---------- */
.proof-grid{display:grid;gap:22px;}
@media (min-width:1024px){ .proof-grid{grid-template-columns:7fr 5fr;} }
.proof-main{overflow:hidden;display:flex;flex-direction:column;}
.proof-main .proof-cover{aspect-ratio:16/9;overflow:hidden;background:#EDF3FB;}
.proof-main .proof-cover img{width:100%;height:100%;object-fit:cover;}
.proof-main .proof-body{padding:26px;display:flex;flex-direction:column;gap:12px;flex:1;}
.proof-num{
  font-size:clamp(30px,3.6vw,38px);font-weight:800;line-height:1.1;color:var(--c-primary);
  letter-spacing:-.02em;
}
.proof-num small{font-size:16px;font-weight:600;color:var(--c-muted);margin-left:6px;}
.proof-side{display:grid;gap:22px;}
.proof-mini{padding:24px;display:flex;flex-direction:column;gap:10px;}
.proof-mini h3{font-size:17.5px;}
.proof-mini p{font-size:14.8px;line-height:1.75;}
.proof-mini .mini-metric{font-size:22px;font-weight:800;color:var(--c-ink);letter-spacing:-.02em;}

/* ---------- 最新信息 ---------- */
.news-card{display:flex;flex-direction:column;overflow:hidden;height:100%;}
.news-cover{aspect-ratio:16/9;overflow:hidden;background:#EDF3FB;}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.news-card:hover .news-cover img{transform:scale(1.04);}
.news-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.news-meta time{font-size:12.5px;color:var(--c-muted);}
.news-body h3{
  font-size:17px;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body p{
  font-size:14.5px;line-height:1.72;color:var(--c-body);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-more{margin-top:auto;padding-top:12px;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--c-primary);}
.news-more i{transition:transform var(--ease);}
.news-card:hover .news-more i{transform:translateX(4px);}
.empty-state{
  border:1px dashed #C9DAF0;border-radius:var(--r-card);background:#fff;
  padding:52px 24px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state i{font-size:26px;color:#9DBEE6;}
.empty-state p{font-size:15px;color:var(--c-muted);}

/* ---------- FAQ ---------- */
.faq-item{
  position:relative;background:#fff;border:1px solid var(--c-line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;
  transition:border-color var(--ease), box-shadow var(--ease);
}
.faq-item[open]{border-color:#CFE0F7;box-shadow:var(--shadow-card);}
.faq-item[open]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-primary);}
.faq-item summary{
  cursor:pointer;list-style:none;position:relative;
  padding:17px 52px 17px 20px;
  font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--c-primary);line-height:1;
}
.faq-item[open] summary::after{content:"−";}
.faq-body{padding:0 20px 18px;font-size:15px;line-height:1.78;color:var(--c-body);}

/* ---------- CTA 通栏 ---------- */
.cta-band{
  background:var(--c-primary-soft);
  border:1px solid #D8E6F9;border-radius:20px;
  padding:36px 24px;display:grid;gap:24px;
}
@media (min-width:1024px){ .cta-band{grid-template-columns:1.5fr .9fr;align-items:center;padding:52px 56px;gap:40px;} }
.cta-band h2{margin-bottom:12px;}
.cta-band p{font-size:15.5px;color:#4E6076;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
@media (max-width:640px){ .cta-actions{flex-direction:column;} .cta-actions .btn{width:100%;} }

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:var(--c-dark);color:#9FB0C2;padding:56px 0 0;margin-top:12px;}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--c-primary),#3E9BF0 48%,var(--c-accent));
}
.footer-grid{display:grid;gap:32px;}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;} }
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{box-shadow:none;}
.footer-brand span{color:#fff;font-size:16px;font-weight:700;}
.footer-desc{font-size:14px;line-height:1.8;color:#92A4B7;max-width:340px;}
.footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px;}
.footer-links a{
  display:block;padding:5px 0;font-size:14px;color:#9FB0C2;
  transition:color var(--ease), transform var(--ease);
}
.footer-links a:hover{color:#fff;transform:translateX(2px);}
.footer-info li{font-size:14px;padding:5px 0;color:#9FB0C2;display:flex;gap:9px;align-items:flex-start;}
.footer-info i{color:#5C93D6;margin-top:5px;font-size:12px;}
.footer-bottom{
  margin-top:40px;padding:20px 0;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:#7E8FA2;
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;padding:8px 14px;
  border:1px solid rgba(255,255,255,.16);border-radius:999px;
  background:transparent;color:#C4D2E0;font-size:13px;cursor:pointer;
  transition:all var(--ease);
}
.to-top:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.3);}

/* roulang page: article */
:root{
  --bg:#070C15;
  --bg-soft:#0C1422;
  --panel:#101B2D;
  --panel-2:#16243A;
  --line:rgba(140,180,220,.16);
  --line-strong:rgba(140,180,220,.30);
  --ink:#EAF3FF;
  --body:#A6B6CA;
  --muted:#7286A0;
  --cyan:#35E0FF;
  --cyan-deep:#0FA8CE;
  --violet:#7C5CFF;
  --amber:#FF8A3D;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 22px 54px -26px rgba(0,0,0,.9);
  --shadow-hover:0 30px 66px -28px rgba(53,224,255,.32);
  --ease:220ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--body);
  background:var(--bg);
  background-image:radial-gradient(900px 520px at 88% -8%,rgba(53,224,255,.14),transparent 60%),radial-gradient(760px 480px at 4% 6%,rgba(124,92,255,.14),transparent 62%);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 32px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,12,21,.86);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.scrolled{box-shadow:0 14px 40px -24px rgba(0,0,0,.95);background:rgba(7,12,21,.96)}
.header-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  font-weight:800;font-size:17px;color:#04121A;
  background:linear-gradient(140deg,var(--cyan),var(--violet));
  box-shadow:0 10px 24px -12px rgba(53,224,255,.9);
}
.brand-name{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:.01em;white-space:nowrap}
.nav-links{display:none;align-items:center;gap:26px;margin-left:12px}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--body);padding:6px 0;
  transition:color var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));transition:right var(--ease);
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{right:0}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{right:0}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--body);background:rgba(255,255,255,.02);
  transition:all var(--ease);
}
.icon-btn:hover{color:var(--cyan);border-color:var(--line-strong);background:rgba(53,224,255,.08)}
.menu-toggle{display:grid}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  padding:12px 22px;border-radius:var(--radius-sm);
  transition:transform var(--ease),background var(--ease),color var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-deep));color:#03121A;box-shadow:0 14px 32px -16px rgba(53,224,255,.85)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 42px -16px rgba(53,224,255,.95)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border:1px solid rgba(53,224,255,.4);color:#9EEBFF;background:rgba(53,224,255,.04)}
.btn-ghost:hover{background:rgba(53,224,255,.12);transform:translateY(-2px)}
.btn-line{border:1px solid var(--line-strong);color:var(--ink);background:rgba(255,255,255,.03)}
.btn-line:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}
.nav-cta{display:none}
@media(min-width:1024px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex}
  .menu-toggle{display:none}
}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);background:rgba(10,17,29,.98);
  padding:14px 20px 20px;
}
.mobile-drawer.open{display:block}
.mobile-drawer a{
  display:block;padding:12px 4px;font-size:15px;color:var(--body);
  border-bottom:1px solid rgba(140,180,220,.10);
}
.mobile-drawer a:hover{color:var(--cyan)}
.mobile-drawer .drawer-cta{margin-top:16px;display:grid;gap:10px}

/* ---------- hero ---------- */
.article-hero{position:relative;overflow:hidden;padding:46px 0 40px;border-bottom:1px solid var(--line)}
.hero-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(100deg,rgba(7,12,21,.97) 0%,rgba(7,12,21,.86) 48%,rgba(7,12,21,.66) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.95;
}
.hero-inner{position:relative}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted);transition:color var(--ease)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{opacity:.55}
.breadcrumb .crumb-current{color:var(--body);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;
  color:#9EEBFF;background:rgba(53,224,255,.10);border:1px solid rgba(53,224,255,.30);
  margin-bottom:16px;
}
.article-title{
  font-size:clamp(26px,3.6vw,36px);line-height:1.3;font-weight:700;letter-spacing:-.01em;
  color:var(--ink);margin:0 0 18px;max-width:900px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:13.5px;color:var(--muted)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:7px}
.article-meta i{color:var(--cyan)}
.meta-chip{
  padding:4px 12px;border-radius:999px;font-size:13px;font-weight:600;
  color:#C9B7FF;background:rgba(124,92,255,.14);border:1px solid rgba(124,92,255,.32);
}

/* ---------- article body ---------- */
.article-main{padding:46px 0 20px}
.article-card{
  max-width:860px;margin:0 auto;background:linear-gradient(180deg,var(--panel),rgba(12,20,34,.92));
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:34px 26px;
}
@media(min-width:768px){.article-card{padding:44px 46px}}
.article-body{font-size:16px;line-height:1.9;color:var(--body)}
.article-body>*:first-child{margin-top:0}
.article-body h2{
  font-size:24px;font-weight:700;color:var(--ink);line-height:1.4;
  margin:40px 0 16px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--cyan),var(--violet));
}
.article-body h3{font-size:19px;font-weight:600;color:var(--ink);margin:30px 0 12px;line-height:1.5}
.article-body p{margin:0 0 18px}
.article-body a{color:var(--cyan);border-bottom:1px solid rgba(53,224,255,.4);transition:all var(--ease)}
.article-body a:hover{color:#9EEBFF;border-bottom-color:#9EEBFF}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:1.4em}
.article-body li{margin-bottom:9px;line-height:1.8}
.article-body ul li::marker{color:var(--cyan)}
.article-body ol li::marker{color:var(--cyan);font-weight:700}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;border-left:3px solid var(--cyan);border-radius:0 12px 12px 0;
  background:rgba(53,224,255,.07);color:#CDE6F5;font-size:15.5px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:22px auto;box-shadow:0 18px 40px -24px rgba(0,0,0,.85)}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.article-body th{background:rgba(53,224,255,.10);color:var(--ink);font-weight:600}
.article-body tr:nth-child(even) td{background:rgba(255,255,255,.02)}
.article-body pre{
  background:#060B14;border:1px solid var(--line);border-radius:12px;padding:16px 18px;
  overflow-x:auto;font-size:14px;line-height:1.7;margin:22px 0;
}
.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;color:#9EEBFF}
.article-body p code,.article-body li code{background:rgba(53,224,255,.10);padding:2px 6px;border-radius:6px}
.article-body hr{border:0;height:1px;background:var(--line);margin:34px 0}

.empty-state{text-align:center;padding:52px 20px}
.empty-state .empty-icon{
  width:64px;height:64px;margin:0 auto 20px;border-radius:18px;display:grid;place-items:center;
  font-size:26px;color:var(--cyan);background:rgba(53,224,255,.10);border:1px solid rgba(53,224,255,.28);
}
.empty-state h2{font-size:22px;font-weight:700;color:var(--ink);margin:0 0 12px}
.empty-state p{font-size:15px;color:var(--body);margin:0 0 24px}

/* ---------- related ---------- */
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:72px 0}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px}
.section-title{font-size:clamp(22px,2.6vw,28px);font-weight:700;color:var(--ink);margin:0 0 8px;letter-spacing:-.01em}
.section-sub{font-size:15px;color:var(--muted);margin:0;max-width:620px}
.link-more{font-size:14.5px;font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:8px;transition:gap var(--ease)}
.link-more:hover{gap:13px}
.card-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(53,224,255,.4)}
.rel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--panel-2)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms ease}
.rel-card:hover .rel-thumb img{transform:scale(1.05)}
.rel-thumb .thumb-tag{
  position:absolute;left:12px;top:12px;padding:4px 11px;border-radius:999px;font-size:12.5px;font-weight:600;
  color:#04121A;background:rgba(53,224,255,.92);
}
.rel-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.rel-body h3{font-size:17.5px;font-weight:600;color:var(--ink);margin:0 0 10px;line-height:1.5}
.rel-body p{font-size:14.5px;color:var(--body);margin:0 0 18px;flex:1}
.rel-foot{display:flex;align-items:center;justify-content:space-between;font-size:13.5px;color:var(--muted)}
.rel-foot i{color:var(--cyan);transition:transform var(--ease)}
.rel-card:hover .rel-foot i{transform:translateX(4px)}

.back-bar{
  max-width:860px;margin:36px auto 0;padding:20px 24px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  background:rgba(255,255,255,.02);border:1px dashed var(--line-strong);border-radius:var(--radius);
}
.back-bar .back-text{font-size:14.5px;color:var(--muted);margin:0}
.back-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- cta ---------- */
.cta-band{padding:20px 0 60px}
.cta-box{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  padding:38px 26px;border:1px solid rgba(53,224,255,.28);
  background:linear-gradient(120deg,rgba(53,224,255,.14),rgba(124,92,255,.16) 70%,rgba(255,138,61,.10));
}
@media(min-width:768px){.cta-box{padding:48px 52px;display:flex;align-items:center;justify-content:space-between;gap:36px}}
.cta-box h2{font-size:clamp(21px,2.4vw,26px);font-weight:700;color:var(--ink);margin:0 0 10px}
.cta-box p{font-size:15px;color:#B9CBE0;margin:0;max-width:600px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px}
@media(min-width:768px){.cta-actions{margin-top:0;flex:0 0 auto}}
@media(max-width:767px){.cta-actions .btn{width:100%}}

/* ---------- footer ---------- */
.site-footer{background:#050A12;border-top:1px solid var(--line);position:relative}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(53,224,255,.75),rgba(124,92,255,.65),transparent);
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px;padding:52px 0 36px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}}
.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:14.5px;color:var(--muted);line-height:1.85;margin:0;max-width:340px}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin:0 0 16px}
.footer-links,.footer-info{list-style:none;margin:0;padding:0}
.footer-links li,.footer-info li{margin-bottom:11px}
.footer-links a{font-size:14px;color:var(--muted);transition:color var(--ease),transform var(--ease);display:inline-block}
.footer-links a:hover{color:#fff;transform:translateX(-2px)}
.footer-info li{display:flex;gap:10px;font-size:14px;color:var(--muted)}
.footer-info i{color:var(--cyan);margin-top:5px}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding:20px 0 30px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;
  border:1px solid var(--line-strong);font-size:13.5px;color:var(--body);
  transition:all var(--ease);
}
.to-top:hover{color:var(--cyan);border-color:var(--cyan);transform:translateY(-2px)}

/* roulang page: category1 */
:root{
  --c-primary:#1966CC;
  --c-primary-deep:#12539F;
  --c-primary-soft:#EAF2FD;
  --c-accent:#DE7420;
  --c-ink:#16202B;
  --c-body:#55616E;
  --c-muted:#8A96A3;
  --c-line:#E4E9F0;
  --c-bg:#F7F9FC;
  --c-card:#FFFFFF;
  --r-card:14px;
  --r-btn:10px;
  --shadow-card:0 1px 2px rgba(16,24,40,.04),0 10px 28px -14px rgba(16,24,40,.16);
  --shadow-hover:0 16px 36px -16px rgba(16,24,40,.22);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-body);
  background:var(--c-bg);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;color:var(--c-ink);letter-spacing:-.01em;line-height:1.3}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}
@media (min-width:1024px){.container{padding:0 32px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.97);
  border-bottom:1px solid var(--c-line);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;height:64px;
}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-ink);letter-spacing:-.01em}
.brand-mark{
  width:32px;height:32px;flex:0 0 32px;border-radius:9px;
  background:linear-gradient(135deg,var(--c-primary),#4C93E8);
  color:#fff;display:grid;place-items:center;font-size:15px;font-weight:700;
}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{
  position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--c-ink);
  transition:color .2s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--c-primary)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--c-primary)}
.nav-right{display:flex;align-items:center;gap:12px}
.icon-btn{
  width:38px;height:38px;border-radius:var(--r-btn);border:1px solid var(--c-line);
  background:#fff;color:var(--c-body);display:grid;place-items:center;
  transition:all .2s ease;
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}
.menu-toggle{display:none;width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--c-line);background:#fff;color:var(--c-ink);font-size:17px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.btn i{font-size:13px;transition:transform .22s ease}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-2px);box-shadow:0 12px 24px -12px rgba(25,102,204,.7)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border-color:var(--c-primary);color:var(--c-primary)}
.btn-ghost:hover{background:var(--c-primary-soft)}
.btn-text{background:none;border:0;padding:0;color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.btn-text:hover i{transform:translateX(4px)}
.btn-lg{padding:14px 28px;font-size:16px}

/* ============ 页面头部 ============ */
.page-hero{position:relative;overflow:hidden;background:#0B1929;color:#fff}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;opacity:.42;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(102deg,rgba(9,20,35,.94) 0%,rgba(11,28,50,.82) 55%,rgba(14,38,68,.62) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:52px;padding-bottom:56px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.68);margin-bottom:18px}
.crumb a:hover{color:#fff}
.crumb i{font-size:10px;opacity:.7}
.crumb .current{color:#fff;font-weight:500}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:500;
  background:rgba(255,255,255,.14);color:#EAF2FD;border:1px solid rgba(255,255,255,.22);
  margin-bottom:18px;
}
.page-hero h1{color:#fff;font-size:clamp(26px,3.6vw,36px);font-weight:700;margin-bottom:16px;max-width:820px}
.page-hero .hero-lead{max-width:760px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.84);margin-bottom:26px}
.hero-facts{display:flex;flex-wrap:wrap;gap:12px}
.hero-fact{
  display:flex;align-items:center;gap:9px;padding:10px 16px;border-radius:var(--r-btn);
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);
  font-size:14px;color:#E8F0FA;
}
.hero-fact i{color:#7FB4F2;font-size:14px}

/* ============ 通用板块 ============ */
.section{padding:52px 0}
@media (min-width:1024px){.section{padding:78px 0}}
.section-head{max-width:760px;margin-bottom:30px}
.section-head h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;margin-bottom:12px}
.section-head p{font-size:15.5px;color:var(--c-body);margin:0}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--c-primary);
  background:var(--c-primary-soft);border-radius:999px;padding:5px 13px;margin-bottom:14px;
}

/* ============ 锚点 chips ============ */
.chips{display:flex;gap:10px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:thin}
.chips::-webkit-scrollbar{height:5px}
.chips::-webkit-scrollbar-thumb{background:var(--c-line);border-radius:999px}
.chip{
  flex:0 0 auto;padding:8px 17px;border-radius:999px;font-size:14px;
  border:1px solid var(--c-line);background:#fff;color:var(--c-body);
  transition:all .2s ease;white-space:nowrap;
}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.chip.active:hover{background:var(--c-primary-deep);color:#fff}

/* ============ 图文交替长列表 ============ */
.split-list{display:flex;flex-direction:column;gap:22px;margin-top:8px}
.split-item{
  display:grid;gap:22px;grid-template-columns:1fr;
  background:var(--c-card);border:1px solid var(--c-line);
  border-radius:16px;padding:20px;box-shadow:var(--shadow-card);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.split-item:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:#D5DEEA}
.split-media{border-radius:14px;overflow:hidden;aspect-ratio:16/9;background:var(--c-primary-soft)}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.split-item:hover .split-media img{transform:scale(1.04)}
.split-index{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:30px;height:30px;padding:0 8px;border-radius:9px;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:13px;font-weight:700;margin-bottom:12px;
}
.split-body h3{font-size:19px;font-weight:600;margin-bottom:10px}
.split-body p{font-size:15.5px;color:var(--c-body);margin-bottom:14px}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.tag{
  font-size:13px;padding:5px 12px;border-radius:999px;
  background:var(--c-bg);border:1px solid var(--c-line);color:var(--c-body);
}
.split-body .btn-text{font-size:15px}
@media (min-width:992px){
  .split-item{grid-template-columns:5fr 7fr;align-items:center;gap:36px;padding:26px}
  .split-item.reverse .split-media{order:2}
}

/* ============ 核对清单 ============ */
.check-panel{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:18px;
  padding:28px;box-shadow:var(--shadow-card);
}
@media (min-width:1024px){.check-panel{padding:38px}}
.check-grid{display:grid;gap:18px;grid-template-columns:1fr;margin-top:8px}
@media (min-width:768px){.check-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1080px){.check-grid{grid-template-columns:repeat(3,1fr)}}
.check-item{
  border:1px solid var(--c-line);border-radius:var(--r-card);padding:20px;
  background:linear-gradient(180deg,#FFFFFF 0%,#FBFCFE 100%);
  transition:border-color .22s ease,box-shadow .22s ease,transform .22s ease;
}
.check-item:hover{border-color:#C9DAEF;box-shadow:0 12px 26px -18px rgba(16,24,40,.24);transform:translateY(-2px)}
.check-item .ci-icon{
  width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:16px;margin-bottom:14px;
}
.check-item h3{font-size:17px;font-weight:600;margin-bottom:8px}
.check-item p{font-size:14.5px;margin:0;color:var(--c-body)}

/* ============ 步骤流程 ============ */
.flow{display:grid;gap:20px;grid-template-columns:1fr;margin-top:12px}
@media (min-width:900px){.flow{grid-template-columns:repeat(4,1fr);gap:24px}}
.flow-step{position:relative;padding-top:8px}
.flow-num{
  width:54px;height:54px;border-radius:50%;display:grid;place-items:center;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:20px;font-weight:700;margin-bottom:16px;border:1px solid #D5E5FA;
}
.flow-step h3{font-size:17px;font-weight:600;margin-bottom:8px}
.flow-step p{font-size:14.5px;margin:0}
@media (min-width:900px){
  .flow-step::after{
    content:"";position:absolute;top:34px;left:66px;right:-14px;
    border-top:1px dashed #C6D6EA;
  }
  .flow-step:last-child::after{display:none}
}

/* ============ FAQ ============ */
.faq-wrap{display:grid;gap:26px;grid-template-columns:1fr}
@media (min-width:1024px){.faq-wrap{grid-template-columns:4fr 8fr;gap:44px;align-items:start}}
.faq-aside h2{font-size:clamp(22px,2.4vw,28px);font-weight:700;margin-bottom:12px}
.faq-aside p{font-size:15.5px;margin-bottom:18px}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item:hover{border-color:#CFDDEE}
.faq-item.open{border-color:var(--c-primary);box-shadow:0 12px 28px -20px rgba(25,102,204,.5)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:17px 20px;background:none;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.6;
}
.faq-item.open .faq-q{box-shadow:inset 3px 0 0 var(--c-primary)}
.faq-q i{color:var(--c-primary);font-size:14px;margin-top:5px;transition:transform .25s ease;flex:0 0 auto}
.faq-item.open .faq-q i{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.75;color:var(--c-body)}

/* ============ CTA 通栏 ============ */
.cta-band{
  background:var(--c-primary-soft);border-radius:20px;
  padding:36px 24px;display:grid;gap:24px;grid-template-columns:1fr;
  border:1px solid #DCE8F9;
}
@media (min-width:900px){
  .cta-band{grid-template-columns:1.5fr 1fr;align-items:center;padding:46px 48px;gap:40px}
}
.cta-band h2{font-size:clamp(21px,2.3vw,27px);font-weight:700;margin-bottom:10px}
.cta-band p{margin:0;font-size:15.5px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:899px){.cta-actions .btn{flex:1 1 100%}}

/* ============ 页脚 ============ */
.site-footer{background:#101A24;color:#C7D0DA;margin-top:64px;position:relative}
@media (min-width:1024px){.site-footer{margin-top:88px}}
.site-footer::before{
  content:"";display:block;height:2px;
  background:linear-gradient(90deg,var(--c-primary) 0%,var(--c-accent) 55%,rgba(16,26,36,0) 100%);
}
.footer-grid{
  display:grid;gap:34px;grid-template-columns:1fr;padding:48px 0 30px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:60px 0 34px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:1.8;color:#93A0AD;margin:0;max-width:320px}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px}
.footer-links li{margin-bottom:10px}
.footer-links li a{font-size:14px;color:#A9B4C0;display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-links li a:hover{color:#fff;transform:translateX(-2px)}
.footer-info li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:#A9B4C0;margin-bottom:12px;line-height:1.7}
.footer-info li i{color:var(--c-primary);margin-top:5px;font-size:13px}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(255,255,255,.1);padding:18px 0 26px;
  font-size:13px;color:#8A96A3;
}
.to-top{
  display:inline-flex;align-items:center;gap:7px;padding:8px 14px;
  border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);color:#D6DEE7;font-size:13px;
  transition:all .2s ease;
}
.to-top:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff}

/* ============ 移动端导航 ============ */
@media (max-width:960px){
  .menu-toggle{display:grid;place-items:center}
  .nav-cta{display:none}
  .nav-links{
    position:absolute;top:64px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--c-line);
    box-shadow:0 20px 40px -24px rgba(16,24,40,.28);
    padding:6px 20px 16px;
    max-height:0;overflow:hidden;opacity:0;pointer-events:none;
    transition:max-height .28s ease,opacity .2s ease;
  }
  .nav-links.open{max-height:420px;opacity:1;pointer-events:auto}
  .nav-links a{padding:13px 0;border-bottom:1px solid var(--c-line);font-size:15.5px}
  .nav-links a:last-child{border-bottom:0}
  .nav-links a::after{display:none}
  .nav-links a.active{color:var(--c-primary)}
}
@media (max-width:520px){
  .nav-inner{height:56px}
  .brand{font-size:15.5px}
  .brand-mark{width:28px;height:28px;flex:0 0 28px;font-size:13px;border-radius:8px}
  .nav-links{top:56px}
  .page-hero .container{padding-top:34px;padding-bottom:38px}
  .hero-fact{font-size:13px;padding:9px 13px}
  .check-panel{padding:20px}
  .cta-band{padding:26px 18px}
  .section{padding:42px 0}
}

/* roulang page: category2 */
:root{
  --c-primary:#1966CC;
  --c-primary-deep:#12539F;
  --c-primary-soft:#EAF2FD;
  --c-accent:#DE7420;
  --c-ink:#16202B;
  --c-body:#55616E;
  --c-muted:#8A96A3;
  --c-line:#E4E9F0;
  --c-bg:#F7F9FC;
  --c-card:#FFFFFF;
  --c-dark:#0E1620;
  --r-card:14px;
  --r-btn:10px;
  --r-img:16px;
  --sh-card:0 1px 2px rgba(16,24,40,.04), 0 10px 28px -14px rgba(16,24,40,.16);
  --sh-hover:0 16px 36px -16px rgba(16,24,40,.22);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
.site-body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--c-ink);line-height:1.28;letter-spacing:-.01em;font-weight:700;margin:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease;
}
.site-header.scrolled{box-shadow:0 8px 24px -16px rgba(16,24,40,.35)}
.header-inner{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-ink);white-space:nowrap}
.brand-mark{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--c-primary),#2E86E8);
  color:#fff;font-size:16px;font-weight:700;
  box-shadow:0 8px 18px -10px rgba(25,102,204,.95);
}
.nav-links{display:flex;align-items:center;gap:22px;flex:1;margin-left:6px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--c-body);padding:6px 0;transition:color .2s ease}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--c-primary);transition:width .22s ease}
.nav-links a:hover{color:var(--c-primary)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--c-primary);font-weight:600}
.nav-links a.active::after{width:100%}
.header-actions{display:flex;align-items:center;gap:12px}
.search-box{display:flex;align-items:center;gap:8px;background:#F1F4F8;border:1px solid var(--c-line);border-radius:999px;padding:6px 14px;color:var(--c-muted);transition:.2s}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(25,102,204,.12)}
.search-box input{width:112px;border:0;background:transparent;outline:none;font-size:14px;color:var(--c-ink)}
.search-box input::placeholder{color:var(--c-muted)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--c-line);color:var(--c-ink);place-items:center;background:#fff}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 12px 24px -14px rgba(25,102,204,.95)}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;color:var(--c-primary);border-color:var(--c-primary)}
.btn-outline:hover{background:var(--c-primary-soft)}
.btn-ghost{height:auto;padding:0;color:var(--c-primary);font-weight:600}
.btn-ghost i{transition:transform .2s ease}
.btn-ghost:hover i{transform:translateX(4px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}

/* ---------- 页头 ---------- */
.hero{
  position:relative;
  padding:56px 0 56px;
  background-image:linear-gradient(180deg,rgba(247,249,252,.94),rgba(247,249,252,.985)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-line);
}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--c-primary-soft);color:var(--c-primary);
  border:1px solid #D3E4FA;border-radius:999px;
  padding:6px 14px;font-size:13px;font-weight:600;
}
.hero-title{font-size:clamp(26px,3.6vw,36px);margin-top:18px}
.hero-sub{margin-top:16px;font-size:16.5px;color:var(--c-body);max-width:640px}
.hero-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.hero-facts{display:flex;gap:28px;margin-top:26px;flex-wrap:wrap}
.hero-fact{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--c-muted)}
.hero-fact i{color:var(--c-primary)}
.hero-visual{position:relative}
.hero-visual img{width:100%;height:340px;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--sh-card)}
.hero-float{
  position:absolute;right:-10px;bottom:-18px;background:#fff;border:1px solid var(--c-line);
  border-radius:14px;padding:14px 18px;box-shadow:var(--sh-hover);display:flex;align-items:center;gap:12px;
}
.hero-float strong{display:block;font-size:20px;color:var(--c-ink);line-height:1.2}
.hero-float span{font-size:13px;color:var(--c-muted)}
.hero-float i{width:38px;height:38px;border-radius:999px;display:grid;place-items:center;background:var(--c-primary-soft);color:var(--c-primary)}

/* ---------- 筛选 chips ---------- */
.chip-row{display:flex;gap:10px;overflow-x:auto;padding:6px 0 10px;margin-top:32px;scrollbar-width:thin}
.chip{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:999px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-body);font-size:14px;transition:.2s ease;
}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px)}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}

/* ---------- 板块 ---------- */
.section{padding:88px 0}
.section-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-kicker{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--c-primary);text-transform:uppercase}
.section-title{font-size:clamp(22px,2.6vw,30px);margin-top:10px}
.section-desc{margin-top:14px;color:var(--c-body)}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.dl-card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--sh-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D7E2F2}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#E9EEF5}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.dl-card:hover .card-media img{transform:scale(1.04)}
.card-media .media-badge{
  position:absolute;left:12px;top:12px;background:rgba(14,22,32,.78);color:#fff;
  font-size:12px;font-weight:600;padding:5px 11px;border-radius:999px;letter-spacing:.02em;
}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.card-title{font-size:18px;font-weight:600}
.card-text{margin-top:10px;font-size:15px;color:var(--c-body);line-height:1.75}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{font-size:12.5px;color:var(--c-primary);background:var(--c-primary-soft);border:1px solid #D8E7FB;border-radius:999px;padding:4px 10px}
.card-foot{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;border-top:1px dashed var(--c-line)}
.card-foot .meta{font-size:13px;color:var(--c-muted)}
.card-link{font-size:14px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:6px}
.card-link i{transition:transform .2s ease}
.dl-card:hover .card-link i{transform:translateX(4px)}

/* ---------- 深色面板 ---------- */
.dark-panel{
  background:radial-gradient(1000px 380px at 12% -10%,rgba(25,102,204,.42),transparent 62%),var(--c-dark);
  border:1px solid #1B2836;border-radius:20px;padding:46px;color:#C4D1DE;
}
.dark-panel h2{color:#fff;font-size:clamp(21px,2.4vw,28px)}
.dark-panel p{margin-top:14px;color:#A6B5C4;max-width:720px}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:34px}
.stat{background:rgba(255,255,255,.05);border:1px solid #223141;border-radius:14px;padding:20px}
.stat-num{font-size:32px;font-weight:700;color:#fff;line-height:1.15;letter-spacing:-.02em}
.stat-num em{font-style:normal;color:var(--c-accent);font-size:18px;font-weight:700;margin-left:2px}
.stat-label{margin-top:6px;font-size:13.5px;color:#93A4B4}
.env-list{margin-top:32px;display:grid;gap:14px}
.env-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:#B7C5D3}
.env-list i{color:var(--c-accent);margin-top:6px}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;margin-top:8px}
.steps::before{content:"";position:absolute;left:28px;right:28px;top:28px;border-top:1px dashed #CBD8E8;z-index:0}
.step{position:relative;z-index:1}
.step-num{
  width:56px;height:56px;border-radius:999px;display:grid;place-items:center;
  background:var(--c-primary-soft);border:1px solid #D3E4FA;color:var(--c-primary);
  font-size:19px;font-weight:700;
}
.step-body{margin-top:16px}
.step-body h3{font-size:18px;font-weight:600}
.step-body p{margin-top:8px;font-size:15px;color:var(--c-body)}

/* ---------- FAQ ---------- */
.faq{max-width:900px}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:#C9DDF7;box-shadow:var(--sh-card)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--c-ink)}
.faq-item.open .faq-q{color:var(--c-primary)}
.faq-q .faq-icon{flex:0 0 auto;color:var(--c-muted);transition:transform .25s ease}
.faq-item.open .faq-icon{transform:rotate(180deg);color:var(--c-primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{margin:0 20px 20px;padding-left:16px;border-left:3px solid var(--c-primary);font-size:15px;line-height:1.78;color:var(--c-body)}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--c-primary-soft);border:1px solid #D8E7FB;border-radius:20px;
  padding:44px 48px;display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-band h2{font-size:clamp(21px,2.4vw,28px)}
.cta-band p{margin-top:12px;color:var(--c-body);max-width:620px}
.cta-actions{display:flex;gap:14px;flex:0 0 auto;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:var(--c-dark);color:#9FB0C0;padding:56px 0 0;margin-top:88px}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--c-primary),#3FA0E0,var(--c-accent))}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:36px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:1.75;color:#93A4B4}
.footer-title{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
.footer-links li{margin-bottom:10px}
.footer-links a{display:inline-block;font-size:14px;color:#9FB0C0;transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:#fff;transform:translateX(-2px)}
.footer-info li{display:flex;gap:10px;align-items:flex-start;font-size:14px;margin-bottom:10px;color:#9FB0C0}
.footer-info i{color:var(--c-primary);margin-top:4px}
.footer-bottom{
  border-top:1px solid #1B2836;padding:18px 0;display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:#7E8C9B;
}
.to-top{
  display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:10px;
  background:#182432;border:1px solid #26364A;color:#C4D1DE;font-size:13px;transition:.2s ease;
}
.to-top:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(14,22,32,.45);opacity:0;pointer-events:none;transition:opacity .25s ease;z-index:70}
.drawer-mask.open{opacity:1;pointer-events:auto}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);background:#fff;z-index:80;
  transform:translateX(105%);transition:transform .28s ease;
  box-shadow:-24px 0 46px -26px rgba(16,24,40,.45);
  padding:22px;display:flex;flex-direction:column;overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.drawer-head strong{font-size:15px;color:var(--c-ink)}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--c-line);display:grid;place-items:center;color:var(--c-ink)}
.drawer-link{display:flex;align-items:center;justify-content:space-between;padding:13px 2px;font-size:15.5px;color:var(--c-ink);border-bottom:1px solid var(--c-line)}
.drawer-link.active{color:var(--c-primary);font-weight:600}
.drawer-cta{margin-top:20px}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links,.search-box{display:none}
  .nav-toggle{display:grid}
  .header-actions{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-visual img{height:300px}
  .hero-float{right:12px;bottom:-16px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px}
}
@media (max-width:639px){
  .section{padding:52px 0}
  .hero{padding:36px 0 44px}
  .hero-title{font-size:26px}
  .hero-actions .btn{width:100%}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-visual img{height:220px}
  .hero-float{position:static;margin-top:14px;right:auto;bottom:auto}
  .card-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .dark-panel{padding:26px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .cta-band{padding:26px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .site-footer{margin-top:52px}
  .hero-facts{gap:16px}
}

/* roulang page: category3 */
:root{
  --c-primary:#1966CC;
  --c-primary-deep:#12539F;
  --c-primary-soft:#EAF2FD;
  --c-accent:#DE7420;
  --c-ink:#16202B;
  --c-body:#55616E;
  --c-muted:#8A96A3;
  --c-line:#E4E9F0;
  --c-bg:#F7F9FC;
  --c-card:#FFFFFF;
  --c-dark:#0E1B2A;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-card:0 1px 2px rgba(16,24,40,.04), 0 10px 28px -14px rgba(16,24,40,.16);
  --shadow-hover:0 16px 36px -16px rgba(16,24,40,.22);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-body);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
ul{margin:0;padding:0;list-style:none;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
@media (min-width:1024px){.container{padding:0 32px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--c-line);
  box-shadow:0 1px 0 rgba(16,24,40,.02);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;height:64px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--c-primary),#3E8AEA);
  color:#fff;font-weight:700;font-size:17px;letter-spacing:.5px;
  box-shadow:0 6px 14px -8px rgba(25,102,204,.75);
}
.brand-text{font-size:16px;font-weight:700;color:var(--c-ink);letter-spacing:-.01em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  position:relative;display:inline-block;
  padding:8px 12px;font-size:15px;font-weight:500;color:#3C4A59;
  border-radius:8px;transition:color .22s ease, background-color .22s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  border-radius:2px;background:var(--c-primary);
  transform:scaleX(0);transform-origin:left center;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--c-primary);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;flex:none;}
.search-box{
  display:flex;align-items:center;gap:8px;
  background:#F2F5FA;border:1px solid var(--c-line);border-radius:var(--radius-pill);
  padding:7px 14px;transition:border-color .22s ease, box-shadow .22s ease, background-color .22s ease;
}
.search-box:focus-within{border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 3px rgba(25,102,204,.13);}
.search-box i{font-size:13px;color:var(--c-muted);}
.search-box input{
  width:132px;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--c-ink);
}
.search-box input::placeholder{color:var(--c-muted);}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--c-line);background:#fff;color:var(--c-ink);
  cursor:pointer;align-items:center;justify-content:center;
  transition:background-color .22s ease, border-color .22s ease;
}
.nav-toggle:hover{background:var(--c-primary-soft);border-color:#C7DBF7;color:var(--c-primary);}
.mobile-drawer{
  display:none;border-top:1px solid var(--c-line);background:#fff;
  padding:14px 20px 22px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer a{
  display:block;padding:12px 4px;font-size:15px;font-weight:500;color:#3C4A59;
  border-bottom:1px solid var(--c-line);
}
.mobile-drawer a.active{color:var(--c-primary);font-weight:600;}
.mobile-drawer .btn{margin-top:16px;width:100%;justify-content:center;}
@media (max-width:1023px){
  .nav-links,.search-box{display:none;}
  .nav-toggle{display:inline-flex;}
}
@media (max-width:640px){
  .brand-text{font-size:15px;}
  .header-inner{height:56px;}
  .header-actions .btn-sm{display:none;}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .22s ease, color .22s ease, border-color .22s ease, transform .22s ease, box-shadow .22s ease;
}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 10px 22px -14px rgba(25,102,204,.9);}
.btn-primary:hover{background:var(--c-primary-deep);transform:translateY(-2px);box-shadow:0 16px 28px -16px rgba(25,102,204,.9);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:#fff;color:var(--c-primary);border-color:#BED6F5;}
.btn-outline:hover{background:var(--c-primary-soft);border-color:var(--c-primary);transform:translateY(-2px);}
.btn-accent{background:var(--c-accent);color:#fff;box-shadow:0 10px 22px -14px rgba(222,116,32,.95);}
.btn-accent:hover{background:#C4631A;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--c-primary);padding:8px 0;font-weight:600;}
.btn-ghost i{transition:transform .22s ease;}
.btn-ghost:hover i{transform:translateX(4px);}

/* ============ 页头 ============ */
.page-hero{
  position:relative;
  padding:52px 0 64px;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg, rgba(255,255,255,.97) 0%, rgba(255,255,255,.93) 46%, rgba(233,242,253,.82) 100%);
}
.page-hero-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(0,1fr);gap:36px;align-items:center;
}
@media (min-width:1024px){
  .page-hero{padding:66px 0 78px;}
  .page-hero-inner{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;}
}
.breadcrumb{font-size:13px;color:var(--c-muted);margin-bottom:16px;}
.breadcrumb a{color:var(--c-muted);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb span{color:var(--c-body);}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--c-primary-soft);color:var(--c-primary-deep);
  border-radius:var(--radius-pill);padding:6px 14px;
  font-size:13px;font-weight:600;margin-bottom:16px;
}
.hero-title{
  margin:0 0 18px;
  font-size:clamp(26px,3.6vw,36px);
  font-weight:700;line-height:1.3;letter-spacing:-.01em;
  color:var(--c-ink);
}
.hero-title .brand-inline{color:var(--c-primary);}
.hero-lead{
  margin:0 0 26px;max-width:620px;
  font-size:16px;line-height:1.85;color:var(--c-body);
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px 26px;}
.meta-item{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:#3C4A59;font-weight:500;}
.meta-item i{color:var(--c-primary);font-size:13px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:18px;border:1px solid var(--c-line);
  box-shadow:0 24px 50px -26px rgba(16,24,40,.4);
}
.hero-badge{
  position:absolute;left:-14px;bottom:-16px;
  background:#fff;border:1px solid var(--c-line);border-radius:14px;
  padding:12px 18px;box-shadow:var(--shadow-card);
  display:flex;align-items:center;gap:12px;
}
.hero-badge strong{display:block;font-size:20px;color:var(--c-ink);line-height:1.2;}
.hero-badge span{font-size:13px;color:var(--c-muted);}
.hero-badge i{color:var(--c-primary);font-size:20px;}
@media (max-width:1023px){
  .hero-visual{display:none;}
  .hero-badge{display:none;}
}
@media (max-width:640px){
  .page-hero{padding:34px 0 44px;}
  .hero-cta .btn{width:100%;}
}

/* ============ 板块通用 ============ */
.section{padding:52px 0;}
@media (min-width:1024px){.section{padding:88px 0;}}
.section-head{max-width:760px;margin-bottom:30px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--c-primary);background:var(--c-primary-soft);
  border-radius:var(--radius-pill);padding:5px 12px;margin-bottom:14px;
}
.section-title{
  margin:0 0 14px;
  font-size:clamp(22px,2.6vw,28px);font-weight:700;line-height:1.35;
  letter-spacing:-.01em;color:var(--c-ink);
}
.section-lead{margin:0;font-size:16px;line-height:1.85;color:var(--c-body);max-width:700px;}
.section-head.center .section-lead{margin:0 auto;}

/* 锚点条 */
.chip-row{
  display:flex;gap:10px;overflow-x:auto;padding:4px 2px 12px;
  scrollbar-width:thin;
}
.chip-row::-webkit-scrollbar{height:6px;}
.chip-row::-webkit-scrollbar-thumb{background:#D3DDEA;border-radius:99px;}
.chip{
  flex:none;display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:var(--radius-pill);
  background:#fff;border:1px solid var(--c-line);
  font-size:14px;font-weight:500;color:#3C4A59;
  transition:all .22s ease;
}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft);}
.chip.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}

/* ============ 主区 + 侧栏 ============ */
.layout-main{display:grid;grid-template-columns:minmax(0,1fr);gap:36px;align-items:start;}
@media (min-width:1024px){
  .layout-main{grid-template-columns:minmax(0,1fr) 320px;gap:40px;}
}
.table-wrap{
  overflow-x:auto;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);
}
table.compare{width:100%;min-width:660px;border-collapse:collapse;}
table.compare caption{text-align:left;padding:0;}
table.compare th{
  background:var(--c-primary-soft);color:var(--c-ink);
  font-size:14px;font-weight:600;text-align:left;
  padding:15px 18px;border-bottom:1px solid var(--c-line);white-space:nowrap;
}
table.compare td{
  padding:16px 18px;border-bottom:1px solid var(--c-line);
  font-size:15px;line-height:1.7;color:var(--c-body);vertical-align:top;
}
table.compare tbody tr{transition:background-color .2s ease;}
table.compare tbody tr:hover{background:#F4F8FE;}
table.compare tbody tr:last-child td{border-bottom:0;}
table.compare td:first-child{font-weight:600;color:var(--c-ink);white-space:nowrap;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:500;padding:4px 10px;border-radius:var(--radius-pill);
}
.badge-soft{background:var(--c-primary-soft);color:var(--c-primary-deep);}
.badge-line{background:#fff;border:1px solid var(--c-line);color:var(--c-body);}
.table-note{margin:14px 0 0;font-size:13px;color:var(--c-muted);}

/* 侧栏 */
.side-col{display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-card);
}
.side-card h3{margin:0 0 6px;font-size:18px;font-weight:600;color:var(--c-ink);}
.side-card .side-desc{margin:0 0 18px;font-size:14px;line-height:1.75;color:var(--c-body);}
.form-field{margin-bottom:14px;}
.form-field label{display:block;font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:6px;}
.form-field .required{color:var(--c-accent);margin-left:2px;}
.form-field input,.form-field textarea{
  width:100%;border:1px solid var(--c-line);border-radius:var(--radius-btn);
  padding:11px 14px;font-size:15px;background:#FCFDFF;color:var(--c-ink);
  transition:border-color .22s ease, box-shadow .22s ease, background-color .22s ease;
}
.form-field textarea{min-height:92px;resize:vertical;}
.form-field input:focus,.form-field textarea:focus{
  outline:none;border-color:var(--c-primary);background:#fff;
  box-shadow:0 0 0 3px rgba(25,102,204,.14);
}
.form-field.has-error input,.form-field.has-error textarea{border-color:#D9483B;background:#FEF6F5;}
.field-error{margin:6px 0 0;font-size:13px;color:#C43C2F;}
.form-hint{margin:2px 0 14px;font-size:13px;color:var(--c-muted);}
.side-sub{font-size:14px;font-weight:600;color:var(--c-ink);margin:0 0 12px;display:flex;align-items:center;gap:8px;}
.side-sub i{color:var(--c-primary);}

/* ============ FAQ ============ */
.faq-list{display:block;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-card);
  overflow:hidden;transition:border-color .22s ease, box-shadow .22s ease;
}
.faq-item + .faq-item{margin-top:12px;}
.faq-item[open]{border-color:#CFE0F7;box-shadow:var(--shadow-card);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 20px;font-size:16px;font-weight:600;color:var(--c-ink);
  cursor:pointer;list-style:none;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;
  font-size:12px;color:var(--c-muted);transition:transform .22s ease;
}
.faq-item[open] .faq-q::after{transform:rotate(180deg);color:var(--c-primary);}
.faq-a{
  margin:0;padding:0 20px 20px;font-size:15px;line-height:1.78;color:var(--c-body);
  border-left:3px solid transparent;
}
.faq-item[open] .faq-a{border-left-color:var(--c-primary);padding-left:17px;}
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;}
@media (min-width:1024px){
  .faq-layout{grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:52px;align-items:start;}
}
.faq-aside .btn{margin-top:22px;}

/* ============ 卡片网格 ============ */
.grid-4{display:grid;grid-template-columns:minmax(0,1fr);gap:22px;}
@media (min-width:640px){.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.grid-4{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}}
.card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-card);display:flex;flex-direction:column;
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#D5E3F7;}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-soft);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.card:hover .card-media img{transform:scale(1.04);}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1;}
.card-body h3{margin:0 0 10px;font-size:18px;font-weight:600;color:var(--c-ink);}
.card-body p{margin:0 0 16px;font-size:15px;line-height:1.78;color:var(--c-body);}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;}
.tag{
  font-size:13px;color:var(--c-primary-deep);background:var(--c-primary-soft);
  border-radius:var(--radius-pill);padding:4px 11px;
}

/* ============ 步骤流程 ============ */
.steps{
  display:grid;grid-template-columns:minmax(0,1fr);gap:26px;
  position:relative;
}
@media (min-width:1024px){.steps{grid-template-columns:repeat(4,minmax(0,1fr));gap:32px;}}
.step{position:relative;padding-left:74px;}
@media (min-width:1024px){
  .step{padding-left:0;padding-top:0;}
}
.step-num{
  position:absolute;left:0;top:0;
  width:56px;height:56px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary);
  font-size:20px;font-weight:700;
}
@media (min-width:1024px){
  .step-num{position:static;margin-bottom:16px;}
}
.step h3{margin:0 0 8px;font-size:18px;font-weight:600;color:var(--c-ink);}
.step p{margin:0;font-size:15px;line-height:1.78;color:var(--c-body);}
@media (min-width:1024px){
  .step::after{
    content:"";position:absolute;top:28px;right:-18px;width:36px;
    border-top:2px dashed #C9D8EC;
  }
  .step:last-child::after{display:none;}
}

/* ============ 深色面板 ============ */
.panel-dark{
  position:relative;overflow:hidden;
  background:linear-gradient(155deg,#0E1B2A 0%,#14304F 58%,#17406B 100%);
  border-radius:20px;padding:34px 24px;
  box-shadow:0 28px 60px -30px rgba(14,27,42,.7);
}
@media (min-width:1024px){.panel-dark{padding:52px 48px;}}
.panel-dark::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(62,138,234,.35),rgba(62,138,234,0) 70%);
}
.panel-head{position:relative;z-index:1;max-width:720px;margin-bottom:30px;}
.panel-title{margin:0 0 12px;font-size:clamp(21px,2.4vw,26px);font-weight:700;color:#fff;line-height:1.35;}
.panel-lead{margin:0;font-size:15px;line-height:1.8;color:#B9C9DC;}
.stat-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(0,1fr);gap:16px;
}
@media (min-width:640px){.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}}
.stat{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.13);
  border-radius:var(--radius-card);padding:20px;
  transition:background-color .22s ease, transform .22s ease;
}
.stat:hover{background:rgba(255,255,255,.12);transform:translateY(-3px);}
.stat-num{display:block;font-size:clamp(24px,3vw,32px);font-weight:700;color:#fff;line-height:1.2;letter-spacing:-.01em;}
.stat-num.accent{color:#F0A05A;}
.stat-label{display:block;margin-top:6px;font-size:14px;font-weight:600;color:#D3E0F0;}
.stat-desc{margin:8px 0 0;font-size:13px;line-height:1.7;color:#9FB2C8;}

/* ============ CTA 通栏 ============ */
.cta-band{
  background:var(--c-primary-soft);
  border:1px solid #D5E4F9;border-radius:20px;
  padding:34px 24px;
  display:grid;grid-template-columns:minmax(0,1fr);gap:24px;align-items:center;
}
@media (min-width:1024px){
  .cta-band{grid-template-columns:minmax(0,1fr) auto;gap:40px;padding:48px 52px;}
}
.cta-band h2{margin:0 0 10px;font-size:clamp(21px,2.4vw,27px);font-weight:700;color:var(--c-ink);line-height:1.35;}
.cta-band p{margin:0;font-size:15px;line-height:1.8;color:var(--c-body);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
@media (max-width:640px){.cta-actions .btn{width:100%;}}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;margin-top:70px;background:var(--c-dark);
  color:#9FB0C4;padding:52px 0 26px;
}
@media (min-width:1024px){.site-footer{margin-top:88px;padding:64px 0 28px;}}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(25,102,204,0),rgba(62,138,234,.9),rgba(25,102,204,0));
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:600;margin-bottom:14px;}
.footer-brand .brand-mark{width:32px;height:32px;border-radius:10px;font-size:16px;}
.footer-desc{margin:0;font-size:14px;line-height:1.8;color:#9FB0C4;max-width:340px;}
.footer-title{margin:0 0 16px;font-size:15px;font-weight:600;color:#fff;}
.footer-links li + li{margin-top:10px;}
.footer-links a{
  display:inline-block;font-size:14px;color:#9FB0C4;
  transition:color .22s ease, transform .22s ease;
}
.footer-links a:hover{color:#fff;transform:translateX(-2px);}
.footer-info li{display:flex;gap:10px;font-size:14px;line-height:1.75;}
.footer-info li + li{margin-top:10px;}
.footer-info i{color:#5E9BE0;margin-top:5px;font-size:13px;}
.footer-bottom{
  margin-top:34px;padding-top:20px;border-top:1px solid rgba(255,255,255,.09);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:#8397AC;
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  color:#C6D5E6;border-radius:var(--radius-pill);
  padding:8px 16px;font-size:13px;cursor:pointer;
  transition:background-color .22s ease, color .22s ease, transform .22s ease;
}
.to-top:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff;transform:translateY(-2px);}