/* roulang page: index */
:root{
  --brand-700:#1B3A6B;
  --brand-600:#24508F;
  --brand-500:#3568B0;
  --brand-100:#E7EFFA;
  --accent:#C08A2E;
  --accent-soft:#F6EDDC;
  --violet:#6B5CA5;
  --ink-900:#14213D;
  --ink-700:#2A3242;
  --ink-500:#5C6679;
  --page-bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --line-strong:#CFD8E6;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,33,61,.05);
  --sh-2:0 6px 18px -8px rgba(20,33,61,.16);
  --sh-3:0 18px 40px -18px rgba(20,33,61,.22);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-body-font-family:var(--font-sans);
  --bs-body-color:var(--ink-700);
  --bs-body-bg:var(--page-bg);
  --bs-link-color:var(--brand-600);
  --bs-link-hover-color:var(--brand-700);
  --bs-border-color:var(--line);
  --bs-border-radius:var(--r-md);
  --bs-primary:var(--brand-600);
  --bs-primary-rgb:36,80,143;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--page-bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--brand-700);}
h1,h2,h3,h4{color:var(--ink-900);margin:0;font-weight:700;letter-spacing:.01em;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(53,104,176,.35);outline-offset:2px;border-radius:6px;}
.container{max-width:1180px;padding-left:24px;padding-right:24px;margin:0 auto;}
@media (min-width:1400px){.container{max-width:1280px;}}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-sans);
  font-size:15px;font-weight:500;line-height:1;border-radius:10px;border:1.5px solid transparent;
  padding:0 26px;height:48px;white-space:nowrap;transition:all .2s ease-out;cursor:pointer;}
.btn-primary,.btn-primary:focus{
  background:var(--brand-600);border-color:var(--brand-600);color:#fff;--bs-btn-bg:var(--brand-600);
  --bs-btn-border-color:var(--brand-600);--bs-btn-hover-bg:var(--brand-700);--bs-btn-hover-border-color:var(--brand-700);
  --bs-btn-active-bg:var(--brand-700);--bs-btn-active-border-color:var(--brand-700);--bs-btn-color:#fff;
  --bs-btn-hover-color:#fff;--bs-btn-active-color:#fff;}
.btn-primary:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px);}
.btn-ghost{background:transparent;border-color:var(--brand-600);color:var(--brand-700);}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-700);border-color:var(--brand-600);}
.btn-sm{height:40px;padding:0 20px;font-size:14px;}
.btn-xs{height:32px;padding:0 16px;font-size:13px;border-radius:8px;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:500;color:var(--brand-600);}
.link-more span{display:inline-block;transition:transform .2s ease-out;}
.link-more:hover span{transform:translateX(3px);}

/* ============ 导航 ============ */
.site-header{position:relative;z-index:1020;}
.brand-bar{background:var(--surface);border-bottom:1px solid var(--line);}
.brand-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand__mark{width:38px;height:38px;flex:0 0 38px;border-radius:10px;background:var(--brand-700);
  display:flex;align-items:center;justify-content:center;}
.brand__mark svg{width:22px;height:22px;}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__name{font-size:18px;font-weight:700;color:var(--ink-900);letter-spacing:.02em;}
.brand__sub{font-size:11px;color:var(--ink-500);letter-spacing:.04em;}
.brand-bar__aside{display:flex;align-items:center;gap:16px;}
.icon-btn{width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-500);cursor:pointer;
  transition:all .2s ease-out;}
.icon-btn:hover{color:var(--brand-600);border-color:var(--line-strong);background:var(--brand-100);}
.brand-bar__tel{font-size:14px;color:var(--ink-500);}
.nav-toggle{width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;display:inline-flex;
  align-items:center;justify-content:center;color:var(--ink-900);}
.channel-bar{position:sticky;top:0;background:var(--surface);box-shadow:var(--sh-1);z-index:1020;border-bottom:1px solid var(--line);}
.channel-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:52px;}
.channel-list{display:flex;align-items:center;gap:26px;}
.channel-link{position:relative;display:inline-flex;align-items:center;height:52px;font-size:15px;color:var(--ink-700);font-weight:500;}
.channel-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand-600);
  transform:scaleX(0);transform-origin:center;transition:transform .2s ease-out;}
.channel-link:hover{color:var(--brand-700);}
.channel-link:hover::after{transform:scaleX(1);}
.channel-link.is-active{color:var(--brand-700);}
.channel-link.is-active::after{transform:scaleX(1);}
.channel-cta{display:inline-flex;align-items:center;height:36px;padding:0 18px;border-radius:10px;background:var(--brand-600);
  color:#fff;font-size:14px;font-weight:500;transition:all .2s ease-out;}
.channel-cta:hover{background:var(--brand-700);color:#fff;box-shadow:var(--sh-2);}
.mobile-drawer{background:var(--surface);border-top:1px solid var(--line);}
.mobile-drawer__inner{padding:16px 24px 22px;}
.mobile-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;}
.mobile-grid a{padding:12px 14px;border-radius:10px;background:var(--page-bg);border:1px solid var(--line);
  font-size:15px;color:var(--ink-700);}
.mobile-grid a.is-active{color:var(--brand-700);border-color:var(--brand-500);background:var(--brand-100);}
.mobile-drawer .btn{width:100%;margin-top:14px;}

/* ============ 通用区块 ============ */
.section{padding:96px 0;}
.section--alt{background:var(--surface);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;letter-spacing:.08em;
  color:var(--brand-600);text-transform:none;margin:0 0 10px;}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);}
.section-title{font-size:31px;line-height:1.3;display:flex;align-items:center;gap:12px;}
.section-title::before{content:"";width:4px;height:26px;border-radius:2px;background:var(--brand-600);flex:0 0 4px;}
.section-lead{font-size:16px;color:var(--ink-500);margin:12px 0 0;max-width:760px;}
.anchor{scroll-margin-top:96px;}
.badge-tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--brand-100);color:var(--brand-700);font-size:12px;font-weight:500;letter-spacing:.02em;}
.badge-tag--violet{background:#EFECF8;color:var(--violet);}
.badge-tag--accent{background:var(--accent-soft);color:#8E6519;}

/* ============ Hero ============ */
.hero{position:relative;background:var(--surface);padding:72px 0 0;overflow:hidden;}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.12;
  background-image:radial-gradient(circle at 12% 22%, var(--brand-500) 1.5px, transparent 2px),
                   radial-gradient(circle at 68% 12%, var(--brand-500) 1.5px, transparent 2px),
                   radial-gradient(circle at 84% 62%, var(--violet) 1.5px, transparent 2px),
                   radial-gradient(circle at 34% 78%, var(--brand-500) 1.5px, transparent 2px);
  background-size:340px 260px,420px 320px,380px 300px,300px 280px;}
.hero__grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.hero__title{font-size:42px;line-height:1.25;margin:14px 0 18px;}
.hero__title em{font-style:normal;color:var(--brand-600);}
.hero__sub{font-size:17px;color:var(--ink-500);max-width:520px;margin-bottom:28px;}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:16px;}
.hero__trust{font-size:13px;color:var(--ink-500);}
.hero__media{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);}
.hero__media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);}
.hero__media::after{content:"";position:absolute;inset:0;opacity:.12;pointer-events:none;
  background-image:radial-gradient(circle at 20% 30%, #fff 1.5px, transparent 2px),
                   radial-gradient(circle at 74% 66%, #fff 1.5px, transparent 2px);
  background-size:260px 220px,300px 240px;}
.hero__stats{margin-top:56px;border-top:1px solid var(--line);padding:28px 0 40px;}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);}
.stat{padding:0 24px;border-left:1px solid var(--line);}
.stat:first-child{border-left:0;padding-left:0;}
.stat__num{font-size:28px;font-weight:700;color:var(--brand-700);line-height:1.2;}
.stat__txt{font-size:14px;color:var(--ink-500);margin-top:4px;}

/* ============ 卖点 非对称 8/4 ============ */
.feature-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px;align-items:stretch;}
.feature-main{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  padding:28px;display:flex;flex-direction:column;transition:box-shadow .2s ease-out,transform .2s ease-out;}
.feature-main:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.feature-main img{border-radius:var(--r-md);aspect-ratio:16/9;object-fit:cover;margin-bottom:24px;}
.feature-main h3{font-size:22px;margin-bottom:12px;}
.feature-side{display:grid;grid-template-rows:1fr 1fr;gap:24px;}
.feature-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  padding:24px;display:flex;gap:16px;transition:box-shadow .2s ease-out,transform .2s ease-out;}
.feature-item:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.feature-item__icon{flex:0 0 44px;width:44px;height:44px;border-radius:12px;background:var(--brand-100);color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;}
.feature-item h3{font-size:19px;margin-bottom:8px;}
.feature-item p{font-size:15px;color:var(--ink-500);}
.point-list{margin-top:18px;display:grid;gap:10px;}
.point-list li{position:relative;padding-left:20px;font-size:15px;color:var(--ink-700);}
.point-list li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--brand-500);}

/* ============ 演示 Tab ============ */
.demo-grid{display:grid;grid-template-columns:1fr 1.35fr;gap:44px;align-items:start;}
.demo-tabs{display:flex;flex-direction:column;gap:10px;}
.demo-tab{text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 18px;cursor:pointer;transition:all .2s ease-out;}
.demo-tab span{display:block;font-size:13px;color:var(--accent);font-weight:600;letter-spacing:.06em;margin-bottom:4px;}
.demo-tab strong{display:block;font-size:16px;color:var(--ink-900);font-weight:600;}
.demo-tab.active{background:var(--brand-100);border-color:var(--brand-500);box-shadow:var(--sh-1);}
.demo-panels{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:24px;}
.demo-panels img{border-radius:var(--r-md);aspect-ratio:16/9;object-fit:cover;margin-bottom:20px;}
.demo-panels h3{font-size:20px;margin-bottom:10px;}
.demo-panels p{font-size:15px;color:var(--ink-500);}
.demo-panels .point-list{margin-top:16px;}

/* ============ 证据 横滚 ============ */
.proof-scroll{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(300px,1fr);gap:20px;overflow-x:auto;
  padding-bottom:12px;scroll-snap-type:x mandatory;}
.proof-scroll::-webkit-scrollbar{height:6px;}
.proof-scroll::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:99px;}
.proof-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  padding:24px;scroll-snap-align:start;display:flex;flex-direction:column;gap:14px;transition:all .2s ease-out;}
.proof-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.proof-card img{border-radius:var(--r-md);aspect-ratio:16/9;object-fit:cover;margin-bottom:4px;}
.proof-card h3{font-size:19px;}
.proof-card p{font-size:15px;color:var(--ink-500);}
.proof-meta{font-size:13px;color:var(--ink-500);display:flex;align-items:center;gap:8px;}
.proof-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line-strong);}

/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.price-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  display:flex;flex-direction:column;overflow:hidden;transition:all .2s ease-out;}
.price-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.price-card__head{padding:24px 26px;border-bottom:1px solid var(--line);position:relative;}
.price-card--featured{background:var(--brand-100);border-color:var(--brand-500);box-shadow:var(--sh-2);}
.price-card--featured .price-card__head{background:rgba(255,255,255,.6);}
.price-card__name{font-size:19px;color:var(--ink-900);font-weight:600;}
.price-card__price{font-size:30px;font-weight:700;color:var(--brand-700);margin-top:10px;line-height:1.2;}
.price-card__price small{font-size:14px;font-weight:400;color:var(--ink-500);margin-left:4px;}
.price-card__tag{position:absolute;top:20px;right:20px;}
.price-card__body{padding:24px 26px;flex:1;display:flex;flex-direction:column;gap:14px;}
.price-card__body .point-list li{font-size:15px;}
.price-card__foot{padding:0 26px 26px;}
.price-card__foot .btn{width:100%;}
.price-note{font-size:14px;color:var(--ink-500);margin-top:24px;}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  overflow:hidden;transition:all .2s ease-out;}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);}
.news-card__body{display:flex;flex-direction:column;gap:12px;padding:24px;height:100%;color:inherit;}
.news-card__title{font-size:19px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;transition:color .2s ease-out;}
.news-card:hover .news-card__title{color:var(--brand-700);}
.news-card__desc{font-size:14px;color:var(--ink-500);line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;
  -webkit-box-orient:vertical;overflow:hidden;}
.news-card__meta{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);
  border-top:1px solid var(--line);padding-top:14px;margin-top:auto;}
.news-card__meta .dot{width:3px;height:3px;border-radius:50%;background:var(--line-strong);}
.empty-state{grid-column:1/-1;text-align:center;padding:56px 24px;background:var(--surface);border:1px dashed var(--line-strong);
  border-radius:var(--r-lg);}
.empty-state svg{color:var(--brand-500);margin-bottom:14px;}
.empty-state p{font-size:16px;color:var(--ink-500);margin-bottom:18px;}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;}
.faq-wrap .accordion-item{background:var(--surface);border:0;border-bottom:1px solid var(--line);border-radius:0;}
.faq-wrap .accordion-button{background:transparent;border:0;box-shadow:none;font-size:18px;font-weight:600;color:var(--ink-900);
  padding:22px 48px 22px 0;position:relative;border-radius:0;}
.faq-wrap .accordion-button::after{display:none;}
.faq-wrap .accordion-button::before{content:"";position:absolute;left:-16px;top:18px;bottom:18px;width:4px;
  border-radius:2px;background:var(--brand-600);opacity:0;transition:opacity .2s ease-out;}
.faq-wrap .accordion-button:not(.collapsed){color:var(--brand-700);}
.faq-wrap .accordion-button:not(.collapsed)::before{opacity:1;}
.faq-wrap .accordion-button .faq-icon{position:absolute;right:0;top:22px;width:22px;height:22px;color:var(--brand-600);}
.faq-wrap .accordion-body{padding:0 32px 24px 0;font-size:15px;line-height:1.85;color:var(--ink-700);}
.accordion-flush .accordion-item:first-child{border-top:1px solid var(--line);}

/* ============ 底部转化 ============ */
.cta-band{background:var(--brand-100);border-radius:var(--r-lg);padding:44px;display:grid;grid-template-columns:1.15fr 1fr;
  gap:40px;align-items:center;}
.cta-band h2{font-size:28px;margin-bottom:12px;}
.cta-band p{font-size:15px;color:var(--ink-700);max-width:520px;}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:22px;}
.cta-form{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-1);}
.form-field{margin-bottom:14px;}
.form-field label{display:block;font-size:14px;font-weight:500;color:var(--ink-700);margin-bottom:6px;}
.form-control{height:48px;border:1px solid var(--line-strong);border-radius:10px;font-size:15px;color:var(--ink-700);
  padding:0 14px;background:#fff;box-shadow:none;}
.form-control::placeholder{color:var(--ink-500);}
.form-control:focus{border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(53,104,176,.18);}
.form-hint{font-size:13px;color:var(--ink-500);margin-top:10px;}

/* ============ 页脚 ============ */
.site-footer{background:#14213D;color:#fff;padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand__name{color:#fff;}
.footer-brand .brand__sub{color:rgba(255,255,255,.6);}
.footer-brand .brand__mark{background:rgba(255,255,255,.12);}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:320px;}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-links a:hover{color:#fff;text-decoration:underline;}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.72);margin-bottom:10px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:20px 0 28px;display:flex;flex-wrap:wrap;
  justify-content:space-between;gap:12px;font-size:13px;color:rgba(255,255,255,.6);}
.footer-bottom a{color:rgba(255,255,255,.72);}

/* ============ 浮动 CTA ============ */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:1030;display:inline-flex;align-items:center;gap:10px;
  height:52px;padding:0 24px;border-radius:var(--r-pill);background:var(--brand-600);color:#fff;font-size:15px;font-weight:500;
  box-shadow:var(--sh-3);opacity:0;visibility:hidden;transform:translateY(10px);transition:all .25s ease-out;}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);}
.mobile-cta{display:none;position:fixed;left:0;right:0;bottom:0;z-index:1030;background:var(--surface);
  border-top:1px solid var(--line);box-shadow:0 -6px 18px -12px rgba(20,33,61,.3);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));align-items:center;gap:12px;}
.mobile-cta .btn{flex:1;}
.mobile-cta__close{width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;
  color:var(--ink-500);display:inline-flex;align-items:center;justify-content:center;flex:0 0 44px;}

/* ============ 滚动入场 ============ */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .4s ease-out,transform .4s ease-out;}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation:none !important;}
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .news-grid{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:991px){
  .section{padding:72px 0;}
  .hero{padding-top:48px;}
  .hero__grid{grid-template-columns:1fr;gap:36px;}
  .hero__title{font-size:32px;}
  .hero__media img{aspect-ratio:16/9;}
  .feature-grid{grid-template-columns:1fr;}
  .demo-grid{grid-template-columns:1fr;gap:28px;}
  .price-grid{grid-template-columns:1fr;gap:18px;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .cta-band{grid-template-columns:1fr;padding:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .channel-list,.channel-cta{display:none;}
  .channel-bar__inner{height:52px;justify-content:space-between;}
  .channel-scroll{display:flex;gap:10px;overflow-x:auto;}
}
@media (max-width:767px){
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:32px;}
  .section-title{font-size:24px;}
  .hero__title{font-size:28px;}
  .hero__actions .btn{width:100%;}
  .stats-row{grid-template-columns:repeat(2,1fr);gap:20px 0;}
  .stat{padding:0 16px;}
  .stat:nth-child(3){border-left:0;padding-left:0;}
  .news-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .float-cta{display:none;}
  .mobile-cta{display:flex;}
  .site-footer{padding-bottom:64px;}
  .faq-wrap .accordion-button{font-size:16px;padding-right:34px;}
}
@media (max-width:519px){
  .proof-scroll{grid-auto-columns:minmax(260px,1fr);}
  .cta-band{padding:24px;}
}

/* roulang page: category1 */
:root{
  --brand-700:#1B3A6B;
  --brand-600:#24508F;
  --brand-500:#3568B0;
  --brand-100:#E7EFFA;
  --accent:#C08A2E;
  --accent-soft:#F6EDDC;
  --violet:#6B5CA5;
  --ink-900:#14213D;
  --ink-700:#2A3242;
  --ink-500:#5C6679;
  --page-bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --line-strong:#CFD8E6;
  --r-sm:8px; --r-md:12px; --r-lg:16px; --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,33,61,.05);
  --sh-2:0 6px 18px -8px rgba(20,33,61,.16);
  --sh-3:0 18px 40px -18px rgba(20,33,61,.22);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-body-font-family:var(--font-sans);
  --bs-body-color:var(--ink-700);
  --bs-body-bg:var(--page-bg);
  --bs-border-color:var(--line);
  --bs-link-color:var(--brand-600);
  --bs-link-hover-color:var(--brand-700);
  --bs-btn-bg:var(--brand-600);
  --bs-btn-border-color:var(--brand-600);
  --bs-btn-hover-bg:var(--brand-700);
  --bs-btn-hover-border-color:var(--brand-700);
  --bs-btn-active-bg:var(--brand-700);
  --bs-btn-active-border-color:var(--brand-700);
  --bs-btn-color:#fff;
  --bs-btn-hover-color:#fff;
  --bs-btn-active-color:#fff;
  --bs-btn-focus-shadow-rgb:53,104,176;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--page-bg);
  color:var(--ink-700);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--brand-700);}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:.01em;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;}

.container{max-width:1180px;padding-left:24px;padding-right:24px;margin:0 auto;}
@media (min-width:1400px){.container{max-width:1280px;}}

/* ---------- 品牌行 ---------- */
.brand-row{background:var(--surface);border-bottom:1px solid var(--line);}
.brand-row__inner{display:flex;align-items:center;gap:24px;height:64px;}
.brand{display:flex;align-items:center;gap:11px;color:inherit;}
.brand__mark{
  width:38px;height:38px;border-radius:10px;background:var(--brand-700);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand__mark svg{width:22px;height:22px;display:block;}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__name{font-size:19px;font-weight:700;color:var(--ink-900);letter-spacing:.02em;}
.brand__sub{font-size:11px;color:var(--ink-500);letter-spacing:.1em;}
.brand-tools{margin-left:auto;display:flex;align-items:center;gap:16px;}
.brand-phone{font-size:14px;color:var(--ink-500);}
.brand-phone strong{color:var(--brand-700);font-weight:600;}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line-strong);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;color:var(--ink-700);cursor:pointer;
  transition:background .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.icon-btn:hover{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-700);}
.icon-btn svg{width:18px;height:18px;}
.btn-outline-brand{
  height:40px;padding:0 20px;border-radius:10px;border:1.5px solid var(--brand-600);
  background:transparent;color:var(--brand-700);font-size:15px;font-weight:500;
  display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn-outline-brand:hover{background:var(--brand-100);color:var(--brand-700);}
.menu-toggle{display:none;}

/* ---------- 频道行 ---------- */
.channel-bar{
  position:sticky;top:0;z-index:1020;background:var(--surface);
  border-bottom:1px solid var(--line);box-shadow:var(--sh-1);
}
.channel-bar__inner{display:flex;align-items:center;gap:20px;min-height:52px;}
.channel-list{display:flex;align-items:center;gap:26px;flex-wrap:wrap;}
.channel-link{
  position:relative;display:inline-block;padding:14px 2px;font-size:15px;color:var(--ink-700);
  white-space:nowrap;
}
.channel-link::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:2px;background:var(--brand-600);
  transform:scaleX(0);transform-origin:left center;transition:transform .2s ease-out;
}
.channel-link:hover{color:var(--brand-700);}
.channel-link:hover::after{transform:scaleX(1);}
.channel-link.is-active{color:var(--brand-700);font-weight:600;}
.channel-link.is-active::after{transform:scaleX(1);}
.channel-cta{
  margin-left:auto;height:38px;padding:0 20px;border-radius:10px;background:var(--brand-600);color:#fff;
  font-size:14px;font-weight:500;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;
  transition:background .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.channel-cta:hover{background:var(--brand-700);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px);}
.channel-scroll{display:none;}

/* ---------- 移动端抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:1080;background:var(--surface);
  transform:translateX(100%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;padding:18px 20px calc(24px + env(safe-area-inset-bottom));
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer__nav{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:20px 0;}
.drawer__nav a{
  padding:14px 16px;border-radius:var(--r-md);background:var(--page-bg);border:1px solid var(--line);
  color:var(--ink-900);font-size:15px;
}
.drawer__nav a.is-active{background:var(--brand-100);border-color:var(--brand-500);color:var(--brand-700);font-weight:600;}
.drawer__cta{
  margin-top:auto;height:48px;border-radius:10px;background:var(--brand-600);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:16px;
}
.drawer__cta:hover{background:var(--brand-700);color:#fff;}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:20px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--brand-700);}
.crumb .sep{color:var(--line-strong);}
.crumb .current{color:var(--ink-900);font-weight:500;}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:800px;margin-bottom:48px;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:500;letter-spacing:.08em;color:var(--brand-600);
  margin-bottom:12px;text-transform:none;
}
.h2{font-size:31px;line-height:1.3;position:relative;padding-left:16px;}
.h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:2px;background:var(--brand-600);
}
.section-lead{margin-top:14px;color:var(--ink-500);font-size:16px;padding-left:16px;}

/* ---------- 页面头 ---------- */
.page-head{padding:48px 0 8px;}
.page-head__grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;}
.page-head h1{
  font-size:42px;line-height:1.25;padding-left:18px;position:relative;
}
.page-head h1::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:5px;border-radius:3px;background:var(--brand-600);
}
.page-head__lead{margin-top:16px;font-size:17px;color:var(--ink-500);max-width:560px;}
.page-head__actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px;}
.page-head__figure{margin:0;}
.page-head__figure img{width:100%;border-radius:var(--r-lg);box-shadow:var(--sh-2);object-fit:cover;aspect-ratio:4/3;}
.btn-primary-brand{
  height:48px;padding:0 26px;border-radius:10px;background:var(--brand-600);color:#fff;font-size:16px;font-weight:500;
  display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;border:1px solid var(--brand-600);
  transition:background .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.btn-primary-brand:hover{background:var(--brand-700);border-color:var(--brand-700);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px);}
.btn-ghost-brand{
  height:48px;padding:0 26px;border-radius:10px;background:transparent;border:1.5px solid var(--brand-600);
  color:var(--brand-700);font-size:16px;font-weight:500;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;
  transition:background .2s ease-out,color .2s ease-out;
}
.btn-ghost-brand:hover{background:var(--brand-100);color:var(--brand-700);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:500;color:var(--brand-600);}
.link-arrow svg{width:16px;height:16px;transition:transform .2s ease-out;}
.link-arrow:hover svg{transform:translateX(3px);}

/* ---------- 图文交错 ---------- */
.media-row{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;}
.media-row + .media-row{margin-top:80px;}
.media-row--rev{grid-template-columns:7fr 5fr;}
.media-row--rev .media-figure{order:2;}
.media-figure{margin:0;}
.media-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2);}
.media-body h2{font-size:26px;line-height:1.35;padding-left:14px;position:relative;}
.media-body h2::before{content:"";position:absolute;left:0;top:.25em;bottom:.25em;width:4px;border-radius:2px;background:var(--brand-500);}
.media-body p{margin-top:16px;color:var(--ink-700);}
.check-list{margin-top:20px;display:grid;gap:10px;}
.check-list li{position:relative;padding-left:20px;font-size:15px;color:var(--ink-700);}
.check-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--brand-500);
}

/* ---------- 步骤区 ---------- */
.steps{display:grid;gap:0;border-top:1px solid var(--line);}
.step{
  display:grid;grid-template-columns:88px 1fr;gap:24px;align-items:flex-start;
  padding:28px 0;border-bottom:1px solid var(--line);
}
.step__no{
  width:56px;height:56px;border-radius:var(--r-pill);background:var(--brand-100);color:var(--accent);
  font-size:22px;font-weight:700;display:flex;align-items:center;justify-content:center;letter-spacing:.02em;
}
.step__body h3{font-size:20px;line-height:1.4;}
.step__body p{margin-top:8px;color:var(--ink-500);font-size:15px;max-width:760px;}

/* ---------- 场景卡片 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;
  box-shadow:var(--sh-1);transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.scene-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--line-strong);}
.scene-card__icon{
  width:42px;height:42px;border-radius:12px;background:var(--brand-100);display:flex;align-items:center;justify-content:center;
  color:var(--brand-700);margin-bottom:16px;
}
.scene-card__icon svg{width:20px;height:20px;}
.scene-card h3{font-size:19px;}
.scene-card p{margin-top:10px;font-size:15px;color:var(--ink-500);}
.tag-row{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--brand-100);color:var(--brand-700);font-size:12px;
}
.tag--violet{background:rgba(107,92,165,.12);color:var(--violet);}
.tag--accent{background:var(--accent-soft);color:#8A6117;}

/* ---------- FAQ ---------- */
.faq-wrap{border-top:1px solid var(--line);}
.faq-wrap .accordion-item{background:var(--surface);border:0;border-bottom:1px solid var(--line);border-radius:0;}
.faq-wrap .accordion-item:has(.accordion-button:not(.collapsed)){box-shadow:inset 4px 0 0 var(--brand-600);}
.faq-wrap .accordion-button{
  background:var(--surface);color:var(--ink-900);font-size:18px;font-weight:600;line-height:1.5;
  padding:22px 20px;box-shadow:none;border-radius:0 !important;
}
.faq-wrap .accordion-button:not(.collapsed){background:var(--surface);color:var(--brand-700);box-shadow:none;}
.faq-wrap .accordion-button:focus{box-shadow:none;outline:none;}
.faq-wrap .accordion-button::after{
  content:"+";background-image:none;width:auto;height:auto;font-size:22px;line-height:1;color:var(--brand-600);
  display:flex;align-items:center;justify-content:center;margin-left:16px;transition:transform .2s ease-out;
}
.faq-wrap .accordion-button:not(.collapsed)::after{content:"−";transform:none;}
.faq-wrap .accordion-body{padding:0 20px 24px 20px;font-size:15px;line-height:1.8;color:var(--ink-700);max-width:820px;}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--brand-100);border-radius:var(--r-lg);padding:48px;
  display:grid;grid-template-columns:1.4fr 1fr;gap:36px;align-items:center;
}
.cta-band h2{font-size:28px;line-height:1.35;}
.cta-band p{margin-top:12px;color:var(--ink-700);font-size:15px;}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;display:inline-flex;align-items:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-pill);background:var(--brand-600);color:#fff;font-size:15px;
  box-shadow:var(--sh-3);opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity .24s ease-out,transform .24s ease-out,background .2s ease-out;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);}
.float-cta svg{width:18px;height:18px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.86);padding:72px 0 calc(28px + 0px);margin-top:8px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.site-footer .brand__mark{background:var(--brand-600);}
.site-footer .brand__name{color:#fff;}
.site-footer .brand__sub{color:rgba(255,255,255,.6);}
.footer-desc{margin-top:18px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.72);max-width:340px;}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links li,.footer-contact li{font-size:14px;line-height:2;color:rgba(255,255,255,.72);}
.footer-links a{color:rgba(255,255,255,.72);}
.footer-links a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- 入场动效 ---------- */
.fade-up{opacity:0;transform:translateY(8px);}
.fade-up.is-in{opacity:1;transform:translateY(0);transition:opacity .4s ease-out,transform .4s ease-out;}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .page-head h1{font-size:38px;}
}
@media (max-width:991px){
  .brand-row__inner{height:56px;}
  .brand-phone,.brand-tools .btn-outline-brand{display:none;}
  .menu-toggle{display:inline-flex;margin-left:auto;}
  .channel-bar__inner{min-height:48px;gap:12px;}
  .channel-list,.channel-cta{display:none;}
  .channel-scroll{
    display:flex;gap:8px;overflow-x:auto;padding:8px 0;scrollbar-width:none;-ms-overflow-style:none;
  }
  .channel-scroll::-webkit-scrollbar{display:none;}
  .channel-scroll .channel-link{
    padding:8px 14px;border-radius:var(--r-pill);background:var(--page-bg);border:1px solid var(--line);font-size:14px;
  }
  .channel-scroll .channel-link::after{display:none;}
  .channel-scroll .channel-link.is-active{background:var(--brand-100);border-color:var(--brand-500);}
  .section{padding:72px 0;}
  .page-head__grid{grid-template-columns:1fr;gap:28px;}
  .page-head__figure{order:-1;}
  .media-row,.media-row--rev{grid-template-columns:1fr;gap:28px;}
  .media-row--rev .media-figure{order:0;}
  .cta-band{grid-template-columns:1fr;padding:36px;gap:24px;}
  .cta-band__actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .h2{font-size:25px;}
  .page-head{padding:28px 0 0;}
  .page-head h1{font-size:29px;padding-left:14px;}
  .page-head__grid{gap:22px;}
  .media-row + .media-row{margin-top:56px;}
  .media-body h2{font-size:22px;}
  .scene-grid{grid-template-columns:1fr;}
  .step{grid-template-columns:64px 1fr;gap:16px;}
  .step__no{width:46px;height:46px;font-size:19px;}
  .cta-band{padding:26px;}
  .cta-band h2{font-size:22px;}
  .cta-band__actions .btn-primary-brand,.cta-band__actions .btn-ghost-brand{width:100%;}
  .page-head__actions .btn-primary-brand{width:100%;}
  .float-cta{
    right:0;left:0;bottom:0;height:56px;border-radius:0;justify-content:center;
    padding:0 44px calc(0px + env(safe-area-inset-bottom));
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .float-cta:hover{transform:translateY(0);}
  .float-cta__close{
    position:absolute;right:10px;top:50%;transform:translateY(-50%);
    width:24px;height:24px;border:0;background:transparent;color:rgba(255,255,255,.85);font-size:18px;line-height:1;cursor:pointer;
  }
  .site-footer{padding-bottom:calc(88px + env(safe-area-inset-bottom));}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (min-width:768px){.float-cta__close{display:none;}}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .fade-up{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --brand-700:#1B3A6B;
  --brand-600:#24508F;
  --brand-500:#3568B0;
  --brand-100:#E7EFFA;
  --accent:#C08A2E;
  --accent-soft:#F6EDDC;
  --violet:#6B5CA5;
  --ink-900:#14213D;
  --ink-700:#2A3242;
  --ink-500:#5C6679;
  --page-bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --line-strong:#CFD8E6;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,33,61,.05);
  --sh-2:0 6px 18px -8px rgba(20,33,61,.16);
  --sh-3:0 18px 40px -18px rgba(20,33,61,.22);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --bs-body-font-family:var(--font-sans);
  --bs-body-color:#2A3242;
  --bs-body-bg:#F6F8FB;
  --bs-border-color:#E3E9F2;
  --bs-link-color:#24508F;
  --bs-link-hover-color:#1B3A6B;
  --bs-btn-bg:#24508F;
  --bs-btn-border-color:#24508F;
  --bs-btn-hover-bg:#1B3A6B;
  --bs-btn-hover-border-color:#1B3A6B;
  --bs-btn-active-bg:#1B3A6B;
  --bs-btn-active-border-color:#1B3A6B;
  --bs-accordion-border-color:#E3E9F2;
  --bs-accordion-btn-focus-box-shadow:0 0 0 3px rgba(53,104,176,.18);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--page-bg);
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color .2s ease-out,border-color .2s ease-out;}
a:hover{color:var(--brand-700);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.32;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:3px solid rgba(53,104,176,.35);outline-offset:2px;border-radius:6px;}
.container{max-width:1180px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;}
@media (min-width:1400px){.container{max-width:1280px;}}

/* ============ 顶部频道导航 ============ */
.channel-bar{
  position:sticky;
  top:0;
  z-index:1020;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.channel-bar__inner{display:flex;align-items:center;gap:22px;min-height:64px;}
.nav-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding-right:20px;border-right:1px solid var(--line);}
.nav-brand__mark{width:36px;height:36px;border-radius:10px;background:var(--brand-700);display:flex;align-items:center;justify-content:center;flex:0 0 auto;}
.nav-brand__mark svg{width:21px;height:21px;}
.nav-brand__text{display:flex;flex-direction:column;line-height:1.15;}
.nav-brand__name{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:.02em;}
.nav-brand__sub{font-size:11px;color:var(--ink-500);letter-spacing:.04em;}
.channel-list{display:flex;align-items:center;gap:26px;flex:1 1 auto;min-width:0;}
.channel-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:64px;
  font-size:15px;
  color:var(--ink-700);
  white-space:nowrap;
  transition:color .2s ease-out;
}
.channel-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--brand-600);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .2s ease-out;
}
.channel-link:hover{color:var(--brand-700);}
.channel-link:hover::after{transform:scaleX(1);}
.channel-link.is-active{color:var(--brand-700);font-weight:600;}
.channel-link.is-active::after{transform:scaleX(1);}
.channel-cta{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:40px;
  padding:0 22px;
  font-size:14px;
  font-weight:600;
  color:#fff;
  background:var(--brand-600);
  border-radius:10px;
  box-shadow:var(--sh-1);
  transition:background .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out;
}
.channel-cta:hover{background:var(--brand-700);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px);}
.channel-scroll{display:none;}
@media (max-width:991.98px){
  .channel-bar__inner{min-height:56px;gap:14px;}
  .nav-brand{padding-right:0;border-right:0;}
  .nav-brand__mark{width:32px;height:32px;}
  .nav-brand__name{font-size:16px;}
  .nav-brand__sub{font-size:10px;}
  .channel-list{display:none;}
  .channel-cta{display:none;}
  .channel-scroll{
    display:flex;
    align-items:center;
    gap:20px;
    flex:1 1 auto;
    overflow-x:auto;
    -ms-overflow-style:none;
    scrollbar-width:none;
  }
  .channel-scroll::-webkit-scrollbar{display:none;}
  .channel-scroll .channel-link{height:56px;font-size:14.5px;}
}

/* ============ 阅读进度条 ============ */
.read-progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:1031;background:transparent;pointer-events:none;}
.read-progress span{display:block;height:100%;width:0;background:var(--brand-600);}

/* ============ 面包屑 ============ */
.breadcrumb-strip{background:var(--surface);border-bottom:1px solid var(--line);}
.breadcrumb-bar{padding:14px 0;font-size:13px;color:var(--ink-500);}
.breadcrumb-list{display:flex;align-items:center;flex-wrap:wrap;gap:8px;min-width:0;}
.breadcrumb-list li{display:flex;align-items:center;gap:8px;min-width:0;}
.breadcrumb-list a{color:var(--ink-500);}
.breadcrumb-list a:hover{color:var(--brand-700);}
.breadcrumb-list .sep{color:var(--line-strong);}
.breadcrumb-list .current{color:var(--ink-700);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
@media (max-width:576px){.breadcrumb-list .current{max-width:180px;}}

/* ============ 文章头部 ============ */
.article-hero{position:relative;background:var(--surface);border-bottom:1px solid var(--line);padding:52px 0 40px;overflow:hidden;}
.article-hero::after{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:340px;height:340px;
  background-image:radial-gradient(rgba(36,80,143,.16) 1.2px,transparent 1.2px);
  background-size:20px 20px;
  opacity:.5;
  pointer-events:none;
}
.article-hero__inner{position:relative;z-index:1;max-width:880px;}
.badge-cat{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  font-size:12px;
  font-weight:600;
  color:var(--brand-700);
  background:var(--brand-100);
  border-radius:var(--r-pill);
  margin-bottom:18px;
}
.article-title{font-size:40px;line-height:1.28;font-weight:700;color:var(--ink-900);letter-spacing:.01em;}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:20px;font-size:13px;color:var(--ink-500);}
.article-meta .divider{width:1px;height:12px;background:var(--line-strong);}
.article-meta strong{font-weight:600;color:var(--ink-700);}
@media (max-width:767.98px){
  .article-hero{padding:36px 0 28px;}
  .article-title{font-size:28px;line-height:1.35;}
}

/* ============ 正文与侧栏布局 ============ */
.article-wrap{padding:48px 0 72px;}
.article-layout{display:grid;grid-template-columns:minmax(0,800px);justify-content:center;gap:40px;}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,800px) 260px;justify-content:space-between;}
}
.article-side{display:none;}
@media (min-width:1200px){.article-side{display:block;}}
.side-card{
  position:sticky;
  top:96px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:22px;
}
.side-title{font-size:15px;font-weight:600;color:var(--ink-900);padding-left:12px;position:relative;margin-bottom:14px;}
.side-title::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:2px;background:var(--brand-600);}
.side-list li + li{border-top:1px solid var(--line);}
.side-list a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 0;font-size:14px;color:var(--ink-700);}
.side-list a:hover{color:var(--brand-700);}
.side-list a span{color:var(--line-strong);transition:transform .2s ease-out,color .2s ease-out;}
.side-list a:hover span{color:var(--brand-600);transform:translateX(3px);}
.side-note{margin-top:16px;padding:14px;background:var(--page-bg);border-radius:var(--r-md);font-size:13px;line-height:1.7;color:var(--ink-500);}

/* ============ 正文排版 ============ */
.article-main{min-width:0;}
.prose{font-size:16px;line-height:1.75;color:var(--ink-700);word-wrap:break-word;}
.prose p{margin:0 0 1.15em;}
.prose h2{font-size:24px;font-weight:700;color:var(--ink-900);margin:40px 0 16px;padding-left:14px;position:relative;}
.prose h2::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:2px;background:var(--brand-600);}
.prose h3{font-size:20px;font-weight:600;color:var(--ink-900);margin:28px 0 12px;}
.prose h4{font-size:17px;font-weight:600;color:var(--ink-900);margin:22px 0 10px;}
.prose ul,.prose ol{margin:0 0 1.15em;}
.prose ul li{position:relative;padding-left:20px;margin-bottom:10px;}
.prose ul li::before{content:"";position:absolute;left:4px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand-500);}
.prose ol{counter-reset:li;padding-left:0;}
.prose ol li{position:relative;padding-left:30px;margin-bottom:10px;counter-increment:li;}
.prose ol li::before{
  content:counter(li);
  position:absolute;left:0;top:5px;
  width:20px;height:20px;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:600;
  color:var(--brand-700);
  background:var(--brand-100);
  border-radius:50%;
}
.prose blockquote{
  margin:20px 0;
  padding:16px 20px;
  background:var(--accent-soft);
  border-left:3px solid var(--accent);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-700);
  font-size:15px;
  line-height:1.8;
}
.prose blockquote p:last-child{margin-bottom:0;}
.prose img{border-radius:12px;margin:16px 0;}
.prose figure{margin:20px 0;}
.prose figcaption{font-size:13px;color:var(--ink-500);text-align:center;margin-top:8px;}
.prose table{width:100%;border-collapse:collapse;font-size:15px;margin:20px 0;}
.prose th{background:var(--brand-100);color:var(--ink-900);font-weight:600;}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left;}
.prose tbody tr:hover td{background:#F8FAFD;}
.prose a{color:var(--brand-600);border-bottom:1px solid rgba(36,80,143,.28);}
.prose a:hover{color:var(--brand-700);border-bottom-color:var(--brand-700);}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;background:#F2F5FA;border-radius:6px;padding:2px 6px;color:var(--ink-900);}
.prose pre{background:#F2F5FA;border-radius:10px;padding:16px;overflow-x:auto;font-size:14px;line-height:1.7;}
.prose pre code{background:none;padding:0;}
.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0;}

/* 空态 */
.empty-state{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:56px 32px;
  text-align:center;
}
.empty-state .empty-icon{width:52px;height:52px;margin:0 auto 18px;border-radius:var(--r-md);background:var(--brand-100);display:flex;align-items:center;justify-content:center;}
.empty-state .empty-icon svg{width:26px;height:26px;}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{font-size:15px;color:var(--ink-500);margin-bottom:22px;}

/* ============ 文末操作区 ============ */
.article-actions{margin-top:44px;padding-top:28px;border-top:1px solid var(--line);}
.tag-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.tag-row .tag-label{font-size:13px;color:var(--ink-500);}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;
  font-size:13px;color:var(--brand-700);
  background:var(--brand-100);
  border-radius:var(--r-pill);
  transition:background .2s ease-out,color .2s ease-out;
}
.tag:hover{background:var(--brand-600);color:#fff;}
.tag.is-violet{background:#EFEBF8;color:#4A3F7E;}
.tag.is-violet:hover{background:var(--violet);color:#fff;}
.pager-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-bottom:26px;}
.pager-card{
  display:flex;
  align-items:center;
  gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:16px;
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.pager-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--line-strong);}
.pager-card__thumb{width:88px;height:58px;flex:0 0 auto;border-radius:10px;overflow:hidden;background:var(--brand-100);}
.pager-card__thumb img{width:100%;height:100%;object-fit:cover;}
.pager-card__body{min-width:0;}
.pager-card__kicker{font-size:12px;color:var(--ink-500);margin-bottom:4px;}
.pager-card__title{font-size:15px;font-weight:600;color:var(--ink-900);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.pager-card:hover .pager-card__title{color:var(--brand-700);}

/* 按钮 */
.btn-main,.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  font-size:15px;
  font-weight:600;
  border-radius:10px;
  white-space:nowrap;
  transition:background .2s ease-out,color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.btn-main{color:#fff;background:var(--brand-600);border:1px solid var(--brand-600);box-shadow:var(--sh-1);}
.btn-main:hover{color:#fff;background:var(--brand-700);border-color:var(--brand-700);box-shadow:var(--sh-2);transform:translateY(-1px);}
.btn-ghost{color:var(--brand-700);background:transparent;border:1.5px solid var(--brand-600);}
.btn-ghost:hover{background:var(--brand-100);color:var(--brand-700);}
.btn-main.is-small,.btn-ghost.is-small{height:40px;padding:0 20px;font-size:14px;}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-600);}
.text-link svg{width:16px;height:16px;transition:transform .2s ease-out;}
.text-link:hover{color:var(--brand-700);}
.text-link:hover svg{transform:translateX(3px);}
.actions-footer{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;}

/* ============ 相关推荐 ============ */
.related-section{padding:0 0 80px;}
.section-head{margin-bottom:28px;}
.eyebrow{display:block;font-size:13px;font-weight:500;letter-spacing:.08em;color:var(--brand-600);margin-bottom:10px;}
.section-head h2{font-size:30px;line-height:1.3;}
.section-head .lead{margin-top:10px;font-size:15px;color:var(--ink-500);max-width:720px;line-height:1.75;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.entry-card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
}
.entry-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--line-strong);}
.entry-card__media{aspect-ratio:16/9;overflow:hidden;background:var(--brand-100);}
.entry-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out;}
.entry-card:hover .entry-card__media img{transform:scale(1.03);}
.entry-card__body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto;}
.entry-card .badge-cat{margin-bottom:12px;}
.entry-card__title{font-size:19px;font-weight:600;line-height:1.45;color:var(--ink-900);margin-bottom:10px;}
.entry-card:hover .entry-card__title{color:var(--brand-700);}
.entry-card__desc{font-size:14px;line-height:1.75;color:var(--ink-500);margin-bottom:18px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.entry-card__foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-500);}
.entry-card__foot .arrow{color:var(--brand-600);transition:transform .2s ease-out;}
.entry-card:hover .entry-card__foot .arrow{transform:translateX(3px);}

/* ============ 底部转化条 ============ */
.cta-band-section{padding:0 0 84px;}
.cta-band{
  background:var(--brand-100);
  border-radius:var(--r-lg);
  padding:40px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:26px;line-height:1.35;margin-bottom:8px;}
.cta-band p{font-size:15px;color:var(--ink-500);max-width:560px;}
.cta-band__actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}

/* ============ 独立 CTA 区块（深色） ============ */
.deep-band{background:var(--ink-900);border-radius:var(--r-lg);padding:44px;color:#fff;position:relative;overflow:hidden;}
.deep-band::after{
  content:"";position:absolute;left:-40px;bottom:-60px;width:280px;height:280px;
  background-image:radial-gradient(rgba(255,255,255,.18) 1.2px,transparent 1.2px);
  background-size:20px 20px;opacity:.35;pointer-events:none;
}
.deep-band h2{color:#fff;font-size:26px;margin-bottom:10px;}
.deep-band p{color:rgba(255,255,255,.76);font-size:15px;max-width:620px;}

/* ============ 页脚 ============ */
.site-footer{background:#14213D;color:rgba(255,255,255,.72);padding:64px 0 28px;position:relative;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.brand__mark{width:36px;height:36px;border-radius:10px;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;flex:0 0 auto;}
.brand__mark svg{width:20px;height:20px;}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__name{font-size:17px;font-weight:700;color:#fff;letter-spacing:.02em;}
.brand__sub{font-size:11px;color:rgba(255,255,255,.6);letter-spacing:.04em;}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);max-width:340px;}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links li,.footer-contact li{margin-bottom:10px;font-size:14px;}
.footer-links a,.footer-contact li{color:rgba(255,255,255,.72);}
.footer-links a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  margin-top:48px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:13px;color:rgba(255,255,255,.56);
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;
  right:24px;bottom:24px;
  z-index:1030;
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  font-size:15px;
  font-weight:600;
  color:#fff;
  background:var(--brand-600);
  border-radius:var(--r-pill);
  box-shadow:var(--sh-3);
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity .25s ease-out,transform .25s ease-out,background .2s ease-out;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px);}
.float-cta svg{width:17px;height:17px;}
.float-cta__close{display:none;}
@media (max-width:767.98px){
  .float-cta{
    left:0;right:0;bottom:0;
    width:100%;
    height:56px;
    border-radius:0;
    padding:0 16px calc(env(safe-area-inset-bottom)) 16px;
    justify-content:center;
    opacity:1;
    transform:none;
    pointer-events:auto;
    box-shadow:0 -6px 18px -10px rgba(20,33,61,.35);
  }
  .float-cta:hover{transform:none;}
  .float-cta__close{
    display:flex;align-items:center;justify-content:center;
    position:absolute;right:10px;top:50%;transform:translateY(-50%);
    width:32px;height:32px;border:0;background:rgba(255,255,255,.16);border-radius:50%;color:#fff;cursor:pointer;
  }
  .float-cta__close svg{width:14px;height:14px;}
  body{padding-bottom:calc(64px + env(safe-area-inset-bottom));}
  .site-footer{padding-bottom:calc(32px + env(safe-area-inset-bottom));}
}

/* ============ 通用响应式 ============ */
.fade-up{opacity:0;transform:translateY(8px);}
.fade-up.is-in{opacity:1;transform:none;transition:opacity .4s ease-out,transform .4s ease-out;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .fade-up{opacity:1;transform:none;}
}
@media (max-width:1199.98px){
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .article-wrap{padding:36px 0 56px;}
  .section-head h2{font-size:26px;}
}
@media (max-width:767.98px){
  .container{padding-left:16px;padding-right:16px;}
  .pager-grid{grid-template-columns:1fr;}
  .cta-band{padding:28px 24px;}
  .cta-band h2{font-size:22px;}
  .cta-band__actions{width:100%;}
  .cta-band__actions .btn-main{width:100%;}
  .deep-band{padding:30px 24px;}
  .related-section{padding-bottom:64px;}
  .cta-band-section{padding-bottom:64px;}
}
@media (max-width:575.98px){
  .card-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .actions-footer{flex-direction:column;align-items:stretch;}
  .actions-footer .btn-ghost{width:100%;}
  .article-meta{gap:10px;}
}

/* roulang page: category2 */
:root{
  --brand-700:#1B3A6B;
  --brand-600:#24508F;
  --brand-500:#3568B0;
  --brand-100:#E7EFFA;
  --accent:#C08A2E;
  --accent-soft:#F6EDDC;
  --violet:#6B5CA5;
  --ink-900:#14213D;
  --ink-700:#2A3242;
  --ink-500:#5C6679;
  --page-bg:#F6F8FB;
  --surface:#FFFFFF;
  --line:#E3E9F2;
  --line-strong:#CFD8E6;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,33,61,.05);
  --sh-2:0 6px 18px -8px rgba(20,33,61,.16);
  --sh-3:0 18px 40px -18px rgba(20,33,61,.22);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --bs-body-font-family:var(--font-sans);
  --bs-body-color:var(--ink-700);
  --bs-body-bg:var(--page-bg);
  --bs-body-font-size:16px;
  --bs-body-line-height:1.75;
  --bs-link-color:var(--brand-600);
  --bs-link-hover-color:var(--brand-700);
  --bs-border-color:var(--line);
  --bs-emphasis-color:var(--ink-900);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--page-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease-out}
a:hover{color:var(--brand-700)}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:.01em}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
svg{display:block}
:focus-visible{outline:3px solid rgba(53,104,176,.35);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1180px;margin-left:auto;margin-right:auto;padding-left:24px;padding-right:24px}
@media (min-width:1200px){.container{max-width:1180px}}
@media (min-width:1400px){.container{max-width:1280px}}
@media (max-width:767.98px){.container{padding-left:16px;padding-right:16px}}

/* ---------- 按钮体系 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 28px;border-radius:10px;font-size:15px;font-weight:600;white-space:nowrap;border:1px solid transparent;transition:background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out}
.btn-primary{
  --bs-btn-bg:var(--brand-600);--bs-btn-border-color:var(--brand-600);
  --bs-btn-hover-bg:var(--brand-700);--bs-btn-hover-border-color:var(--brand-700);
  --bs-btn-active-bg:var(--brand-700);--bs-btn-active-border-color:var(--brand-700);
  --bs-btn-color:#fff;--bs-btn-hover-color:#fff;--bs-btn-active-color:#fff;
  --bs-btn-disabled-bg:var(--brand-500);--bs-btn-disabled-border-color:var(--brand-500);
  background:var(--brand-600);border-color:var(--brand-600);color:#fff;
}
.btn-primary:hover,.btn-primary:focus{background:var(--brand-700);border-color:var(--brand-700);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border:1.5px solid var(--brand-600);color:var(--brand-700)}
.btn-ghost:hover,.btn-ghost:focus{background:var(--brand-100);border-color:var(--brand-600);color:var(--brand-700)}
.btn-sm{height:40px;padding:0 20px;font-size:14px;border-radius:10px}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-600)}
.btn-text svg{transition:transform .2s ease-out}
.btn-text:hover svg{transform:translateX(3px)}

/* ---------- 顶部品牌行 ---------- */
.site-header{position:relative;z-index:1030}
.brand-bar{background:var(--surface);border-bottom:1px solid var(--line)}
.brand-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;padding-top:8px;padding-bottom:8px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand__mark{width:38px;height:38px;flex:none;border-radius:11px;background:var(--brand-600);display:grid;place-items:center}
.brand__text{display:flex;flex-direction:column;line-height:1.16}
.brand__name{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:.02em}
.brand__sub{font-size:11px;color:var(--ink-500);letter-spacing:.06em}
.brand-bar__right{display:flex;align-items:center;gap:20px}
.brand-bar__meta{font-size:14px;color:var(--ink-500);font-variant-numeric:tabular-nums}
.brand-bar__meta strong{color:var(--brand-700);font-weight:700}
@media (max-width:991.98px){
  .brand-bar__meta{display:none}
  .brand-bar__inner{min-height:56px}
}
@media (max-width:575.98px){
  .brand__sub{display:none}
  .brand-bar__right .btn{height:36px;padding:0 16px;font-size:13px}
}

/* ---------- 频道导航 ---------- */
.channel-bar{position:sticky;top:0;z-index:1020;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--sh-1)}
.channel-bar__inner{display:flex;align-items:center;gap:24px}
.channel-list{display:flex;align-items:center;gap:26px;flex:1 1 auto;min-width:0}
.channel-link{position:relative;display:inline-flex;align-items:center;height:52px;font-size:15px;color:var(--ink-700);white-space:nowrap}
.channel-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:left center;transition:transform .2s ease-out}
.channel-link:hover::after,.channel-link:focus-visible::after{transform:scaleX(1)}
.channel-link.is-active{color:var(--brand-700);font-weight:600}
.channel-link.is-active::after{transform:scaleX(1)}
.channel-cta{display:inline-flex;align-items:center;height:38px;padding:0 20px;border-radius:10px;background:var(--brand-600);color:#fff;font-size:14px;font-weight:600;white-space:nowrap;transition:background-color .2s ease-out,box-shadow .2s ease-out}
.channel-cta:hover{background:var(--brand-700);color:#fff;box-shadow:var(--sh-2)}
.channel-scroll{display:flex;align-items:center;gap:22px}
.channel-scroll::-webkit-scrollbar{display:none}
@media (max-width:991.98px){
  .channel-list{display:none}
  .channel-cta{display:none}
  .channel-bar__inner{display:block}
  .channel-scroll{overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:0}
  .channel-scroll .channel-link{height:48px;font-size:14px}
}

/* ---------- 通用板块骨架 ---------- */
.section{padding:96px 0}
.section--tight{padding-top:72px}
.section--alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:44px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:500;letter-spacing:.08em;color:var(--brand-600)}
.section-head h2{position:relative;font-size:31px;line-height:1.3;padding-left:18px;margin:12px 0 14px}
.section-head h2::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;background:var(--brand-600)}
.section-head--center h2{padding-left:0}
.section-head--center h2::before{display:none}
.section-head p{font-size:16px;color:var(--ink-500);margin:0}
@media (max-width:991.98px){.section{padding:72px 0}}
@media (max-width:575.98px){
  .section{padding:56px 0}
  .section-head h2{font-size:25px}
  .section-head{margin-bottom:32px}
}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{padding:20px 0 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500)}
.crumb a{color:var(--ink-500)}
.crumb a:hover{color:var(--brand-600)}
.crumb span[aria-current]{color:var(--ink-900);font-weight:600}
.crumb i{font-style:normal;color:var(--line-strong)}

/* ---------- 页面头（居中版） ---------- */
.page-head{padding:34px 0 0;text-align:center}
.page-head__inner{max-width:800px;margin:0 auto}
.page-head h1{font-size:42px;line-height:1.25;margin:14px 0 18px}
.page-head__lead{font-size:17px;color:var(--ink-700);margin-bottom:12px}
.page-head__note{font-size:15px;color:var(--ink-500);max-width:680px;margin:0 auto}
.page-head__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px}
.page-head__banner{margin-top:44px;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-2);position:relative}
.page-head__banner img{width:100%;height:clamp(200px,30vw,360px);object-fit:cover}
@media (max-width:767.98px){
  .page-head h1{font-size:30px}
  .page-head__lead{font-size:16px}
  .page-head__actions .btn{width:100%}
  .page-head__banner{margin-top:32px}
}

/* ---------- 数据条 ---------- */
.stats-wrap{padding:44px 0 0}
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden}
.stat{padding:28px 22px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat__num{display:block;font-size:32px;font-weight:700;color:var(--brand-700);line-height:1.15;font-variant-numeric:tabular-nums}
.stat__unit{font-size:15px;font-weight:600;margin-left:2px}
.stat__label{display:block;margin-top:6px;font-size:14px;color:var(--ink-500)}
@media (max-width:767.98px){
  .stats-bar{grid-template-columns:repeat(2,1fr)}
  .stat{border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
  .stat:nth-child(2n){border-right:0}
  .stat:nth-child(n+3){border-bottom:0}
}
@media (max-width:575.98px){
  .stat{padding:20px 14px}
  .stat__num{font-size:26px}
}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:36px;margin-top:8px}
.timeline::before{content:"";position:absolute;left:7px;top:10px;bottom:10px;width:1px;background:var(--line-strong)}
.timeline__item{position:relative;padding-bottom:36px}
.timeline__item:last-child{padding-bottom:0}
.timeline__dot{position:absolute;left:-36px;top:7px;width:15px;height:15px;border-radius:50%;background:var(--surface);border:2px solid var(--violet);box-shadow:0 0 0 4px rgba(107,92,165,.10)}
.timeline__stage{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--violet);background:rgba(107,92,165,.10);border-radius:var(--r-pill);padding:3px 12px;margin-bottom:10px}
.timeline__item h3{font-size:21px;line-height:1.4;margin-bottom:8px}
.timeline__item p{font-size:15px;color:var(--ink-500);max-width:720px;margin:0}
@media (max-width:575.98px){
  .timeline{padding-left:28px}
  .timeline__dot{left:-28px;width:13px;height:13px}
  .timeline__item h3{font-size:18px}
}

/* ---------- 双栏信息卡矩阵 ---------- */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.info-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh-1);transition:box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out}
.info-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--line-strong)}
.info-card__icon{width:44px;height:44px;border-radius:12px;background:var(--brand-100);display:grid;place-items:center;color:var(--brand-600);margin-bottom:16px}
.info-card h3{font-size:20px;line-height:1.4;margin-bottom:10px}
.info-card p{font-size:15px;color:var(--ink-500);margin:0}
@media (max-width:767.98px){
  .info-grid{grid-template-columns:1fr;gap:16px}
  .info-card{padding:22px}
  .info-card h3{font-size:18px}
}

/* ---------- 响应分级表 ---------- */
.sla-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden}
.sla-table{width:100%;border-collapse:collapse;margin:0}
.sla-table th{background:var(--brand-100);color:var(--brand-700);font-size:14px;font-weight:600;text-align:left;padding:15px 22px;border-bottom:1px solid var(--line);white-space:nowrap}
.sla-table td{padding:17px 22px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink-700);vertical-align:top}
.sla-table tbody tr:last-child td{border-bottom:0}
.sla-table tbody tr{transition:background-color .2s ease-out}
.sla-table tbody tr:hover{background:#F8FAFD}
.level-tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:3px 12px;border-radius:var(--r-pill);white-space:nowrap}
.level-tag--urgent{background:#FBE9E7;color:#A8352A}
.level-tag--high{background:var(--accent-soft);color:#8C6318}
.level-tag--normal{background:var(--brand-100);color:var(--brand-700)}
.level-tag--plan{background:rgba(107,92,165,.12);color:var(--violet)}
@media (max-width:767.98px){
  .sla-wrap{background:transparent;border:0;border-radius:0;box-shadow:none;overflow:visible}
  .sla-table,.sla-table tbody,.sla-table tr,.sla-table td{display:block;width:100%}
  .sla-table thead{display:none}
  .sla-table tr{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:8px 0;margin-bottom:16px}
  .sla-table td{display:flex;gap:16px;justify-content:space-between;align-items:flex-start;border:0;padding:10px 20px;font-size:14px;text-align:right}
  .sla-table td::before{content:attr(data-label);color:var(--ink-500);font-size:13px;flex:none;text-align:left}
}

/* ---------- FAQ ---------- */
.faq-accordion{
  --bs-accordion-border-color:var(--line);
  --bs-accordion-border-radius:16px;
  --bs-accordion-inner-border-radius:0;
  --bs-accordion-btn-padding-x:26px;
  --bs-accordion-btn-padding-y:22px;
  --bs-accordion-btn-color:var(--ink-900);
  --bs-accordion-btn-bg:#fff;
  --bs-accordion-active-color:var(--brand-700);
  --bs-accordion-active-bg:#fff;
  --bs-accordion-btn-focus-box-shadow:none;
  --bs-accordion-body-padding-x:26px;
  --bs-accordion-body-padding-y:6px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.faq-accordion .accordion-item{background:var(--surface);border:0;border-bottom:1px solid var(--line)}
.faq-accordion .accordion-item:last-child{border-bottom:0}
.faq-accordion .accordion-button{position:relative;font-size:18px;font-weight:600;line-height:1.5;box-shadow:none;text-align:left}
.faq-accordion .accordion-button::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:4px;border-radius:0 3px 3px 0;background:var(--brand-600);transform:scaleY(0);transform-origin:center;transition:transform .2s ease-out}
.faq-accordion .accordion-button:not(.collapsed)::before{transform:scaleY(1)}
.faq-accordion .accordion-button::after{
  width:16px;height:16px;flex:none;margin-left:16px;background-image:linear-gradient(var(--brand-600),var(--brand-600)),linear-gradient(var(--brand-600),var(--brand-600));
  background-position:center center,center center;
  background-size:14px 2px,2px 14px;
  background-repeat:no-repeat;
  transition:background-size .2s ease-out;
}
.faq-accordion .accordion-button:not(.collapsed)::after{background-size:14px 2px,2px 0;transform:none}
.faq-accordion .accordion-button:not(.collapsed){background:var(--surface);color:var(--brand-700)}
.faq-accordion .accordion-body{font-size:15px;line-height:1.85;color:var(--ink-700);padding-left:30px}
@media (max-width:575.98px){
  .faq-accordion{--bs-accordion-btn-padding-x:18px;--bs-accordion-btn-padding-y:18px;--bs-accordion-body-padding-x:18px}
  .faq-accordion .accordion-button{font-size:16px}
  .faq-accordion .accordion-body{padding-left:22px;font-size:14px}
}

/* ---------- 底部转化条 ---------- */
.cta-band{background:var(--brand-100);border-radius:var(--r-lg);padding:46px 44px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{font-size:27px;line-height:1.35;margin-bottom:10px;color:var(--brand-700)}
.cta-band p{margin:0;font-size:15px;color:var(--ink-700);max-width:620px}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
@media (max-width:767.98px){
  .cta-band{padding:30px 22px}
  .cta-band h2{font-size:22px}
  .cta-band__actions{width:100%}
  .cta-band__actions .btn{flex:1 1 auto}
}

/* ---------- 页脚 ---------- */
.site-footer{background:#14213D;color:rgba(255,255,255,.72);padding:76px 0 28px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-brand .brand__mark{width:36px;height:36px;border-radius:11px;background:rgba(255,255,255,.12)}
.footer-brand .brand__name{font-size:17px;font-weight:700;color:#fff}
.footer-brand .brand__sub{font-size:11px;color:rgba(255,255,255,.6);letter-spacing:.06em}
.footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:350px;margin:0}
.footer-title{font-size:15px;font-weight:600;color:#fff;margin-bottom:18px}
.footer-links li,.footer-contact li{margin-bottom:11px;font-size:14px;color:rgba(255,255,255,.72);font-variant-numeric:tabular-nums}
.footer-links a{color:rgba(255,255,255,.72)}
.footer-links a:hover{color:#fff;text-decoration:underline}
.footer-bottom{margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6)}
@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:575.98px){
  .site-footer{padding:52px 0 84px;margin-top:56px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;margin-top:36px}
}

/* ---------- 浮动 CTA ---------- */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:1040;display:inline-flex;align-items:center;gap:10px;height:50px;padding:0 24px;border-radius:var(--r-pill);background:var(--brand-600);color:#fff;font-size:15px;font-weight:600;box-shadow:var(--sh-3);opacity:0;transform:translateY(10px);pointer-events:none;transition:opacity .25s ease-out,transform .25s ease-out,background-color .2s ease-out}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--brand-700);color:#fff;transform:translateY(-2px)}
.float-cta__close{display:none}
@media (max-width:767.98px){
  .float-cta{left:0;right:0;bottom:0;height:56px;border-radius:0;padding:0 52px;justify-content:center;transform:translateY(100%)}
  .float-cta.is-visible{transform:translateY(0)}
  .float-cta:hover{transform:translateY(0)}
  .float-cta__close{display:grid;place-items:center;position:absolute;right:12px;top:50%;margin-top:-12px;width:24px;height:24px;border:0;background:rgba(255,255,255,.16);border-radius:50%;color:#fff;padding:0}
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(8px);transition:opacity .4s ease-out,transform .4s ease-out}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}
h1[id],h2[id],section[id]{scroll-margin-top:96px}