/* roulang page: index */
:root{
  --c-primary:#1F5C9E;
  --c-primary-d:#16436F;
  --c-primary-l:#E8F0FA;
  --c-accent:#D9764A;
  --c-accent-l:#FBEDE6;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-line:#E2E9F2;
  --c-text:#1B2733;
  --c-text-2:#5E6E80;
  --c-text-3:#8B99A8;
  --c-ok:#2F9E73;
  --c-warn:#E8A33D;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 6px 24px rgba(20,52,88,.07);
  --sh-2:0 14px 34px rgba(20,52,88,.12);
  --container:1180px;
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color 180ms ease;}
a:hover{color:var(--c-primary-d);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--c-text);font-weight:700;letter-spacing:.01em;}
p{margin:0 0 20px;}
ul,ol{margin:0;padding:0;list-style:none;}
input,textarea,select{font-family:inherit;}
:focus-visible{outline:2px solid rgba(31,92,158,.5);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px;}

/* ---------- 按钮与徽章 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;transition:all var(--ease);
}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-d);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:none;}
.btn-primary:focus-visible{box-shadow:0 0 0 3px rgba(31,92,158,.28);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-l);color:var(--c-primary-d);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn-link{background:none;border:none;padding:0;height:auto;color:var(--c-primary);font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:8px;cursor:pointer;}
.btn-link i{transition:transform 180ms ease,color 180ms ease;}
.btn-link:hover i{transform:translateX(3px);color:var(--c-accent);}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:13px;font-weight:600;line-height:1;white-space:nowrap;}
.badge-primary{background:var(--c-primary-l);color:var(--c-primary);}
.badge-accent{background:var(--c-accent-l);color:var(--c-accent);}
.badge-white{background:rgba(255,255,255,.94);color:var(--c-primary);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:999px;background:var(--c-primary-l);color:var(--c-primary);font-size:13px;font-weight:600;margin-bottom:20px;}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:200;background:#fff;border-bottom:1px solid var(--c-line);transition:box-shadow 200ms ease;}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(20,52,88,.06);}
.nav-wrap{display:flex;align-items:center;gap:28px;height:64px;transition:height 200ms ease;}
.site-header.is-scrolled .nav-wrap{height:56px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--c-primary);color:#fff;display:grid;place-items:center;font-size:15px;box-shadow:0 4px 12px rgba(31,92,158,.28);}
.brand-text{font-size:20px;font-weight:700;letter-spacing:.02em;color:var(--c-text);}
.brand:hover .brand-text{color:var(--c-primary);}
.nav-links{display:flex;align-items:center;gap:22px;flex:1 1 auto;min-width:0;}
.nav-link{position:relative;font-size:15px;color:var(--c-text-2);padding:6px 0;transition:color 180ms ease;white-space:nowrap;}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--c-primary);transition:width 180ms ease;}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{width:100%;}
.nav-tools{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.nav-search input[type="search"]{
  width:200px;height:36px;border-radius:var(--r-sm);
  background:#F2F5F9;border:1px solid transparent;padding:0 14px;
  font-size:14px;color:var(--c-text);outline:none;margin:0;
  transition:border-color 180ms ease,background 180ms ease,box-shadow 180ms ease;
}
.nav-search input[type="search"]::placeholder{color:var(--c-text-3);}
.nav-search input[type="search"]:focus{border-color:var(--c-primary);background:#fff;box-shadow:none;}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line);background:#fff;color:var(--c-text);align-items:center;justify-content:center;font-size:17px;cursor:pointer;transition:background 180ms ease,color 180ms ease;}
.nav-toggle:hover{background:var(--c-bg);color:var(--c-primary);}
.mobile-panel{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--c-line);box-shadow:0 18px 34px rgba(20,52,88,.10);max-height:calc(100vh - 64px);overflow-y:auto;padding:12px 0 24px;}
.mobile-panel.open{display:block;}
.mobile-panel .container{display:flex;flex-direction:column;gap:4px;}
.mobile-panel a.mp-link{display:flex;align-items:center;justify-content:space-between;padding:13px 4px;border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-text-2);}
.mobile-panel a.mp-link:hover{color:var(--c-primary);}
.mobile-panel a.mp-link.active{color:var(--c-primary);font-weight:600;}
.mp-tools{display:flex;flex-direction:column;gap:12px;margin-top:18px;}
.mp-tools input[type="search"]{width:100%;height:44px;border-radius:var(--r-sm);border:1px solid #DCE5F0;background:#F5F8FC;padding:0 14px;font-size:14px;outline:none;margin:0;}
.mp-tools input[type="search"]:focus{border-color:var(--c-primary);background:#fff;}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(180deg,#F6F8FB 0%,#FFFFFF 100%);border-bottom:1px solid var(--c-line);}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding-top:72px;padding-bottom:88px;}
.hero-copy h1{font-size:42px;line-height:1.25;letter-spacing:.02em;margin-bottom:18px;}
.hero-sub{font-size:17px;line-height:1.8;color:var(--c-text-2);max-width:32em;margin-bottom:28px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px;}
.hero-stats{display:flex;gap:44px;flex-wrap:wrap;border-top:1px solid var(--c-line);padding-top:24px;}
.hero-stats strong{display:block;font-size:28px;line-height:1.2;font-weight:700;color:var(--c-primary-d);font-variant-numeric:tabular-nums;}
.hero-stats span{font-size:13px;color:var(--c-text-3);}
.hero-visual{position:relative;}
.hero-visual > img{width:100%;aspect-ratio:5/4;object-fit:cover;border-radius:20px;background:#EDF2F8;box-shadow:var(--sh-1);}
.float-card{position:absolute;background:#fff;border:1px solid var(--c-line);border-radius:14px;box-shadow:var(--sh-2);display:flex;align-items:center;gap:10px;padding:10px 14px;font-size:13px;color:var(--c-text-2);}
.float-card img{width:42px;height:42px;border-radius:10px;object-fit:cover;background:#EDF2F8;}
.float-card b{display:block;color:var(--c-text);font-size:14px;font-weight:600;}
.float-a{left:-18px;bottom:32px;}
.float-b{right:-14px;top:34px;flex-direction:column;align-items:flex-start;gap:6px;padding:12px 16px;}

/* ---------- 板块通用 ---------- */
.section{padding:88px 0;}
.section-alt{background:var(--c-bg);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px;}
.section-head h2{font-size:32px;line-height:1.35;}
.section-head p{font-size:15px;color:var(--c-text-2);margin:10px 0 0;max-width:60em;}
.section-head .head-side{display:flex;align-items:center;gap:16px;}

/* ---------- 主题封面带 ---------- */
.cover-band{display:grid;grid-template-columns:1.35fr 1fr 1fr;grid-auto-rows:214px;gap:20px;}
.cover-card{position:relative;display:block;border-radius:var(--r-lg);overflow:hidden;background:#EDF2F8;box-shadow:var(--sh-1);transition:box-shadow var(--ease),transform var(--ease);}
.cover-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);}
.cover-card img{width:100%;height:100%;object-fit:cover;transition:transform 500ms ease;}
.cover-card:hover img{transform:scale(1.04);}
.cover-card::after{content:"";position:absolute;left:0;right:0;bottom:0;height:48%;background:linear-gradient(180deg,rgba(15,35,60,0) 0%,rgba(15,35,60,.55) 100%);pointer-events:none;}
.cover-card--lg{grid-row:span 2;}
.cover-card--wide{grid-column:span 2;}
.cover-tag{position:absolute;top:16px;left:16px;z-index:2;}
.cover-meta{position:absolute;left:20px;right:20px;bottom:18px;z-index:2;color:#fff;}
.cover-meta h3{color:#fff;font-size:20px;line-height:1.4;margin-bottom:4px;}
.cover-meta span{font-size:13px;color:rgba(255,255,255,.84);}

/* ---------- 合集目录 ---------- */
.catalog-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 32px;}
.catalog-row{display:flex;align-items:center;gap:16px;height:64px;padding:0 16px;border-bottom:1px solid var(--c-line);border-radius:10px;color:var(--c-text);transition:background 200ms ease,transform 200ms ease;}
.catalog-row:hover{background:#F2F6FC;transform:translateX(4px);color:var(--c-text);}
.catalog-num{width:26px;flex-shrink:0;font-size:14px;font-weight:700;color:var(--c-text-3);font-variant-numeric:tabular-nums;}
.catalog-name{flex:1 1 auto;font-size:16px;font-weight:600;min-width:0;}
.catalog-count{font-size:13px;color:var(--c-text-3);white-space:nowrap;}
.catalog-row i{color:var(--c-text-3);transition:color 200ms ease,transform 200ms ease;}
.catalog-row:hover i{color:var(--c-accent);transform:translateX(3px);}

/* ---------- 精选条目 ---------- */
.feature-list{display:flex;flex-direction:column;gap:20px;}
.feature-card{display:grid;grid-template-columns:200px 1fr;gap:24px;padding:20px;border:1px solid var(--c-line);border-radius:var(--r-lg);background:#fff;box-shadow:var(--sh-1);color:var(--c-text);transition:box-shadow var(--ease),transform var(--ease);}
.feature-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);color:var(--c-text);}
.feature-thumb{width:200px;height:134px;border-radius:var(--r-md);object-fit:cover;background:#EDF2F8;}
.feature-body h3{font-size:18px;line-height:1.5;font-weight:600;margin-bottom:8px;}
.feature-body p{font-size:14px;line-height:1.7;color:var(--c-text-2);margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.feature-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--c-text-3);}
.feature-meta .arrow{margin-left:auto;color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.feature-card:hover .arrow i{transform:translateX(3px);color:var(--c-accent);}
.feature-meta .arrow i{transition:transform 180ms ease,color 180ms ease;}

/* ---------- 三步流程 ---------- */
.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.process-card{padding:28px;border-radius:var(--r-lg);background:var(--c-bg);border:1px solid var(--c-line);transition:background 200ms ease,box-shadow 200ms ease,transform 200ms ease;}
.process-card:hover{background:#fff;box-shadow:var(--sh-1);transform:translateY(-3px);}
.process-num{width:36px;height:36px;border-radius:50%;background:#fff;border:1px solid var(--c-primary);color:var(--c-primary);display:grid;place-items:center;font-size:15px;font-weight:700;margin-bottom:16px;}
.process-card h3{font-size:18px;margin-bottom:8px;}
.process-card p{font-size:14px;line-height:1.75;color:var(--c-text-2);margin:0;}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.news-card{display:flex;flex-direction:column;padding:24px;border:1px solid var(--c-line);border-radius:var(--r-lg);background:#fff;box-shadow:var(--sh-1);color:var(--c-text);transition:box-shadow var(--ease),transform var(--ease);}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);color:var(--c-text);}
.news-top{margin-bottom:14px;}
.news-card h3{font-size:18px;line-height:1.5;font-weight:600;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card p{font-size:14px;line-height:1.75;color:var(--c-text-2);margin-bottom:0;flex:1 1 auto;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding-top:14px;border-top:1px solid var(--c-line);font-size:13px;color:var(--c-text-3);}
.news-meta .news-arrow{color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.news-card:hover .news-arrow i{transform:translateX(3px);color:var(--c-accent);}
.news-meta .news-arrow i{transition:transform 180ms ease,color 180ms ease;}
.empty-state{grid-column:1 / -1;text-align:center;padding:56px 24px;border:1px dashed #CFDCEC;border-radius:var(--r-lg);background:#fff;}
.empty-state i{display:block;font-size:48px;line-height:1;color:var(--c-text-3);margin-bottom:18px;}
.empty-state strong{display:block;font-size:16px;font-weight:600;margin-bottom:6px;}
.empty-state span{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:22px;}

/* ---------- 相关推荐横滚 ---------- */
.scroll-wrap{position:relative;}
.scroll-track{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 18px;scrollbar-width:none;}
.scroll-track::-webkit-scrollbar{display:none;}
.scroll-card{flex:0 0 calc((100% - 72px) / 3.5);scroll-snap-align:start;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);padding:12px;box-shadow:var(--sh-1);color:var(--c-text);transition:box-shadow var(--ease),transform var(--ease);}
.scroll-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);color:var(--c-text);}
.scroll-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-md);background:#EDF2F8;margin-bottom:12px;}
.scroll-card h3{font-size:16px;line-height:1.5;font-weight:600;margin-bottom:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.scroll-card .badge{margin-bottom:2px;}
.scroll-btn{position:absolute;top:calc(50% - 34px);width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--c-line);box-shadow:var(--sh-1);color:var(--c-primary);display:grid;place-items:center;cursor:pointer;z-index:3;transition:background 180ms ease,color 180ms ease,transform 180ms ease;}
.scroll-btn:hover{background:var(--c-primary);color:#fff;transform:translateY(-1px);}
.scroll-btn.prev{left:-12px;}
.scroll-btn.next{right:-12px;}

/* ---------- 收藏分享 CTA ---------- */
.cta-bar{background:var(--c-primary-l);border-radius:20px;padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-bar h2{font-size:26px;line-height:1.4;margin-bottom:8px;}
.cta-bar p{font-size:15px;color:var(--c-text-2);margin:0;max-width:34em;}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.social{display:flex;gap:10px;}
.social a,.social button{width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid #D8E4F2;color:var(--c-primary);display:grid;place-items:center;font-size:15px;cursor:pointer;transition:background 180ms ease,color 180ms ease,transform 180ms ease;}
.social a:hover,.social button:hover{background:var(--c-primary);color:#fff;transform:translateY(-2px);}
.cta-note{margin-top:14px;font-size:13px;color:var(--c-text-3);min-height:20px;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 0;background:none;border:none;text-align:left;font-size:17px;line-height:1.6;font-weight:600;color:var(--c-text);cursor:pointer;transition:color 180ms ease;}
.faq-q:hover{color:var(--c-primary);}
.faq-q i{flex-shrink:0;color:var(--c-text-3);font-size:14px;transition:transform 240ms ease,color 240ms ease;}
.faq-item.open .faq-q{color:var(--c-primary);}
.faq-item.open .faq-q i{transform:rotate(180deg);color:var(--c-primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms ease;}
.faq-a p{padding:0 0 20px;margin:0;font-size:15px;line-height:1.8;color:var(--c-text-2);max-width:68ch;}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--c-line);padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:56px;}
.footer-brand .brand{margin-bottom:6px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-text-2);margin:14px 0 18px;max-width:24em;}
.footer-contact a{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--c-text-2);margin-bottom:10px;}
.footer-contact a:hover{color:var(--c-primary);}
.footer-contact i{color:var(--c-primary);font-size:13px;width:16px;text-align:center;}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:var(--c-text-2);}
.footer-col ul a:hover{color:var(--c-primary);}
.footer-col p.tip{font-size:13px;color:var(--c-text-3);line-height:1.7;margin:12px 0 0;}
.subscribe-form{display:flex;flex-direction:column;gap:10px;margin-top:6px;}
.subscribe-form input[type="email"]{width:100%;height:44px;border-radius:var(--r-sm);border:1px solid #DCE5F0;background:#F5F8FC;padding:0 14px;font-size:14px;color:var(--c-text);outline:none;margin:0;transition:border-color 180ms ease,background 180ms ease;}
.subscribe-form input[type="email"]:focus{border-color:var(--c-primary);background:#fff;}
.subscribe-form .btn{height:44px;}
.subscribe-tip{font-size:13px;color:var(--c-text-3);min-height:20px;}
.footer-bottom{border-top:1px solid var(--c-line);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--c-text-3);}
.footer-bottom .fb-links{display:flex;gap:18px;flex-wrap:wrap;}
.footer-bottom .fb-links a{color:var(--c-text-3);}
.footer-bottom .fb-links a:hover{color:var(--c-primary);}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-links,.nav-search,.nav-tools .btn-primary{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-wrap{height:60px;gap:16px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;padding-top:48px;padding-bottom:64px;}
  .hero-visual > img{aspect-ratio:16/9;}
  .float-a{left:12px;bottom:16px;}
  .float-b{right:12px;top:16px;}
  .section{padding:64px 0;}
  .cover-band{grid-template-columns:1fr 1fr;grid-auto-rows:190px;}
  .cover-card--lg{grid-row:span 2;}
  .cover-card--wide{grid-column:span 2;}
  .catalog-grid{grid-template-columns:1fr;gap:0;}
  .news-grid{grid-template-columns:1fr;}
  .process-grid{grid-template-columns:1fr;}
  .scroll-card{flex:0 0 calc((100% - 24px) / 2.2);}
  .scroll-btn{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-bar{padding:32px;}
}
@media (max-width:768px){
  .hero-copy h1{font-size:32px;}
  .hero-stats{gap:28px;}
  .section-head h2{font-size:24px;}
  .cover-band{grid-template-columns:1fr;grid-auto-rows:200px;}
  .cover-card--lg,.cover-card--wide{grid-row:auto;grid-column:auto;}
  .feature-card{grid-template-columns:1fr;gap:16px;padding:16px;}
  .feature-thumb{width:100%;height:180px;}
  .cta-bar{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 140px;}
  .footer-grid{grid-template-columns:1fr;}
  .scroll-card{flex:0 0 78%;}
}
@media (max-width:520px){
  .container{padding-left:16px;padding-right:16px;}
  .hero-copy h1{font-size:28px;}
  .hero-sub{font-size:15px;}
  .hero-actions .btn{width:100%;}
  .hero-stats strong{font-size:24px;}
  .brand-text{font-size:18px;}
  .btn{height:46px;padding:0 20px;}
  .btn-sm{height:38px;padding:0 16px;}
  .cta-bar{padding:24px;}
  .cta-bar h2{font-size:22px;}
  .scroll-card{flex:0 0 88%;}
  .catalog-name{font-size:15px;}
  .catalog-count{display:none;}
}

/* roulang page: article */
:root{
  --c-primary:#1F5C9E;
  --c-primary-d:#16436F;
  --c-primary-l:#E8F0FA;
  --c-accent:#D9764A;
  --c-accent-l:#FBEEE7;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-line:#E2E9F2;
  --c-text:#1B2733;
  --c-text-2:#5E6E80;
  --c-text-3:#8B99A8;
  --c-ok:#2F9E73;
  --c-warn:#E8A33D;
  --r-sm:10px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh-1:0 6px 24px rgba(20,52,88,.07);
  --sh-2:0 14px 34px rgba(20,52,88,.12);
  --sh-nav:0 6px 18px rgba(20,52,88,.06);
  --w-max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-d);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.35;letter-spacing:.01em;}
p{margin:0 0 20px;}
p:last-child{margin-bottom:0;}
::selection{background:var(--c-primary-l);color:var(--c-primary-d);}
.container{
  width:100%;
  max-width:var(--w-max);
  margin:0 auto;
  padding:0 24px;
}
.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--c-primary);color:#fff;
  padding:12px 20px;border-radius:0 0 var(--r-sm) 0;z-index:999;
}
.skip-link:focus{left:0;color:#fff;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;background:transparent;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.btn i{font-size:14px;}
.btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);}
.btn-primary:hover{background:var(--c-primary-d);border-color:var(--c-primary-d);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-primary:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,92,158,.28);}
.btn-ghost{background:var(--c-surface);color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-l);color:var(--c-primary-d);transform:translateY(-1px);}
.btn-ghost:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,92,158,.24);}
.btn-soft{background:var(--c-primary-l);color:var(--c-primary-d);border-color:transparent;}
.btn-soft:hover{background:#DCE9F8;color:var(--c-primary-d);}
.btn-soft:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,92,158,.24);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:9px;}
.btn-block{width:100%;}
.btn:focus{outline:none;}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:13px;font-weight:500;line-height:1;white-space:nowrap;
}
.badge-cat{background:var(--c-primary-l);color:var(--c-primary);}
.badge-accent{background:var(--c-accent-l);color:var(--c-accent);}
.badge-soft{background:#F2F5F9;color:var(--c-text-2);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-nav);}
.header-inner{
  display:flex;align-items:center;gap:20px;
  height:64px;
  transition:height .25s ease;
}
.site-header.is-scrolled .header-inner{height:56px;}
.brand{
  display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;
  color:var(--c-text);
}
.brand:hover{color:var(--c-text);}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:var(--c-primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;flex:0 0 auto;
  box-shadow:0 4px 12px rgba(31,92,158,.24);
  transition:transform .22s ease;
}
.brand:hover .brand-mark{transform:translateY(-1px) rotate(-4deg);}
.brand-text{font-size:20px;font-weight:700;letter-spacing:.02em;}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:8px;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--c-text-2);
  border-radius:8px;
  transition:color .18s ease,background .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--c-primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left center;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--c-primary);background:#F7FAFD;}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-link:focus-visible{outline:2px solid rgba(31,92,158,.4);outline-offset:2px;}
.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto;flex:0 0 auto;}
.nav-search{position:relative;margin:0;}
.nav-search input{
  width:200px;height:36px;padding:0 14px 0 34px;
  border:1px solid transparent;border-radius:var(--r-sm);
  background:#F2F5F9;color:var(--c-text);font-size:14px;
  transition:border-color .2s ease,background .2s ease,width .2s ease;
}
.nav-search input::placeholder{color:var(--c-text-3);}
.nav-search input:focus{outline:none;background:#fff;border-color:var(--c-primary);}
.nav-search i{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--c-text-3);pointer-events:none;
}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--c-line);background:#fff;color:var(--c-primary);
  align-items:center;justify-content:center;cursor:pointer;font-size:16px;
  transition:background .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:var(--c-primary-l);border-color:#CBDCEE;}
.nav-toggle:focus-visible{outline:2px solid rgba(31,92,158,.4);outline-offset:2px;}

/* 移动端抽屉 */
.mobile-mask{
  position:fixed;inset:0;background:rgba(20,40,64,.36);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:90;
}
.mobile-panel{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);
  background:#fff;z-index:95;padding:22px 20px;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;gap:18px;overflow-y:auto;
  box-shadow:-16px 0 40px rgba(20,52,88,.14);
}
.mobile-panel .panel-head{display:flex;align-items:center;justify-content:space-between;}
.panel-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-text-2);cursor:pointer;font-size:15px;
}
.panel-close:hover{background:#F2F5F9;color:var(--c-primary);}
.mobile-nav{display:flex;flex-direction:column;gap:4px;}
.mobile-nav a{
  padding:12px 12px;border-radius:10px;font-size:15px;color:var(--c-text);
  display:flex;align-items:center;justify-content:space-between;
  transition:background .18s ease,color .18s ease;
}
.mobile-nav a:hover,.mobile-nav a:focus-visible{background:var(--c-primary-l);color:var(--c-primary-d);outline:none;}
.mobile-nav a i{font-size:12px;color:var(--c-text-3);}
.mobile-search{display:flex;flex-direction:column;gap:8px;}
.mobile-search label{font-size:13px;color:var(--c-text-2);}
.mobile-search input{
  height:44px;border-radius:var(--r-sm);border:1px solid #DCE5F0;
  background:#F5F8FC;padding:0 14px;font-size:14px;width:100%;
}
.mobile-search input:focus{outline:none;border-color:var(--c-primary);background:#fff;}
body.panel-open{overflow:hidden;}
body.panel-open .mobile-mask{opacity:1;visibility:visible;}
body.panel-open .mobile-panel{transform:translateX(0);}

/* ---------- 页面主体 ---------- */
.page-main{padding:0 0 88px;background:var(--c-bg);}
.crumb-bar{padding:24px 0 0;}
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--c-text-3);line-height:1.7;
}
.breadcrumbs a{color:var(--c-text-2);}
.breadcrumbs a:hover{color:var(--c-primary);}
.breadcrumbs .sep{color:#C6D2DF;}
.breadcrumbs .current{color:var(--c-primary);font-weight:500;}

.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 240px;
  gap:56px;
  align-items:start;
  padding-top:28px;
}
.article-main{min-width:0;}
.article-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:40px 44px 44px;
}
.article-head .badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.article-head h1{
  font-size:36px;line-height:1.28;font-weight:700;letter-spacing:.01em;
  color:var(--c-text);margin:0 0 18px;
  overflow-wrap:break-word;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;
  font-size:14px;color:var(--c-text-2);
}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}
.article-meta i{color:var(--c-text-3);font-size:13px;}
.meta-share{display:inline-flex;align-items:center;gap:8px;margin-left:auto;}
.icon-btn{
  width:36px;height:36px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);background:#fff;color:var(--c-text-2);
  cursor:pointer;font-size:14px;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.icon-btn:hover{background:var(--c-primary-l);color:var(--c-primary);border-color:#CBDCEE;transform:translateY(-1px);}
.icon-btn:focus-visible{outline:2px solid rgba(31,92,158,.4);outline-offset:2px;}
.meta-divider{height:1px;background:var(--c-line);margin:24px 0 0;}

/* ---------- 文章正文 ---------- */
.article-body{
  max-width:760px;
  font-size:17px;line-height:1.9;color:var(--c-text);
  padding-top:30px;
  overflow-wrap:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body h2{
  font-size:24px;line-height:1.45;font-weight:700;color:var(--c-text);
  margin:48px 0 18px;padding-left:14px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;
  border-radius:3px;background:var(--c-primary);
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;margin:32px 0 14px;color:var(--c-primary-d);}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px;}
.article-body p{margin:0 0 20px;}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(31,92,158,.35);}
.article-body a:hover{color:var(--c-accent);text-decoration-color:var(--c-accent);}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:4px;}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:7px;height:7px;border-radius:2px;background:var(--c-primary);
}
.article-body ol{list-style:decimal;padding-left:22px;}
.article-body ol li{margin-bottom:10px;padding-left:4px;}
.article-body ol li::marker{color:var(--c-primary);font-weight:600;}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;
  background:#F7FAFD;border-left:3px solid var(--c-primary);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--c-text-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-md);margin:26px auto;max-width:100%;background:#EDF2F8;}
.article-body figure{margin:26px 0;}
.article-body figcaption{
  text-align:center;font-size:13px;color:var(--c-text-3);margin-top:10px;
}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;
  border:1px solid var(--c-line);border-radius:var(--r-md);overflow:hidden;
}
.article-body thead th{
  background:#F2F6FC;color:var(--c-primary-d);font-weight:600;
  text-align:left;padding:12px 14px;border-bottom:1px solid var(--c-line);
}
.article-body tbody td{padding:12px 14px;border-bottom:1px solid var(--c-line);color:var(--c-text-2);}
.article-body tbody tr:nth-child(even){background:#FAFCFE;}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body hr{border:none;border-top:1px solid var(--c-line);margin:34px 0;}
.article-body code{
  background:#F2F5F9;padding:2px 6px;border-radius:6px;
  font-size:14px;color:var(--c-primary-d);
}

/* 空态 */
.empty-state{
  text-align:center;padding:56px 20px;background:#F9FBFD;
  border:1px dashed #D8E3EF;border-radius:var(--r-lg);margin-top:30px;
}
.empty-state i{font-size:48px;color:#C3D2E2;display:block;margin-bottom:16px;}
.empty-state h2{font-size:19px;font-weight:600;color:var(--c-text);margin:0 0 8px;padding:0;}
.empty-state h2::before{display:none;}
.empty-state p{font-size:14px;color:var(--c-text-2);margin:0 0 20px;}

/* 文末操作 */
.article-foot{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:40px;padding-top:28px;border-top:1px solid var(--c-line);
}
.article-foot .tag-line{font-size:13px;color:var(--c-text-3);margin-right:auto;}

/* 侧边目录 */
.article-aside{position:sticky;top:88px;}
.aside-box{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);box-shadow:var(--sh-1);padding:22px 20px;
}
.aside-title{
  font-size:13px;font-weight:600;color:var(--c-text-3);
  letter-spacing:.12em;text-transform:uppercase;margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.aside-title i{color:var(--c-accent);}
.toc-list{display:flex;flex-direction:column;gap:2px;border-left:2px solid var(--c-line);padding-left:0;}
.toc-list a{
  display:block;padding:7px 12px;font-size:14px;line-height:1.6;color:var(--c-text-2);
  border-left:2px solid transparent;margin-left:-2px;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.toc-list a:hover,.toc-list a.is-active{
  color:var(--c-primary);border-left-color:var(--c-primary);background:#F7FAFD;
}
.toc-empty{font-size:14px;color:var(--c-text-3);line-height:1.7;}
.aside-cta{
  margin-top:18px;padding:20px;
  background:var(--c-primary-l);border-radius:var(--r-lg);
  text-align:left;
}
.aside-cta h3{font-size:16px;font-weight:600;color:var(--c-primary-d);margin:0 0 8px;}
.aside-cta p{font-size:13px;line-height:1.7;color:#4A6C8E;margin:0 0 14px;}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0 0;}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:28px;
}
.section-head h2{font-size:26px;line-height:1.35;font-weight:700;color:var(--c-text);}
.section-head p{font-size:14px;color:var(--c-text-2);margin:6px 0 0;}
.text-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:500;color:var(--c-primary);
}
.text-link i{transition:transform .2s ease,color .2s ease;font-size:13px;}
.text-link:hover i{transform:translateX(3px);color:var(--c-accent);}

/* 相关推荐卡片 */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
  height:100%;
}
.post-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#D3E0EE;}
.post-card:focus-visible{outline:2px solid rgba(31,92,158,.45);outline-offset:3px;}
.post-thumb{
  position:relative;aspect-ratio:16/10;background:#EDF2F8;overflow:hidden;
}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-body h3{font-size:18px;line-height:1.5;font-weight:600;color:var(--c-text);}
.post-card:hover .post-body h3{color:var(--c-primary-d);}
.post-body p{font-size:14px;line-height:1.7;color:var(--c-text-2);margin:0;}
.post-meta{
  display:flex;align-items:center;gap:10px;
  margin-top:auto;padding-top:8px;font-size:13px;color:var(--c-text-3);
}
.post-meta .arrow{margin-left:auto;color:var(--c-primary);transition:transform .2s ease;}
.post-card:hover .post-meta .arrow{transform:translateX(3px);color:var(--c-accent);}

/* ---------- CTA 条 ---------- */
.cta-bar{
  margin-top:64px;
  background:var(--c-primary-l);
  border-radius:var(--r-lg);
  padding:36px 40px;
  display:flex;flex-wrap:wrap;align-items:center;gap:24px;justify-content:space-between;
}
.cta-bar h2{font-size:24px;line-height:1.4;color:var(--c-primary-d);margin:0 0 6px;}
.cta-bar p{font-size:15px;color:#4A6C8E;margin:0;}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;}
.social-row{display:flex;align-items:center;gap:10px;margin-left:6px;}
.social-link{
  width:44px;height:44px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:#fff;color:var(--c-primary);border:1px solid #D3E2F2;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.social-link:hover{background:var(--c-primary);color:#fff;transform:translateY(-2px);box-shadow:0 8px 18px rgba(31,92,158,.2);}
.social-link:focus-visible{outline:2px solid rgba(31,92,158,.45);outline-offset:2px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-surface);
  border-top:1px solid var(--c-line);
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1.4fr;
  gap:36px 28px;
  padding-bottom:44px;
}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-text-2);margin:14px 0 16px;max-width:280px;}
.footer-contact{display:flex;flex-direction:column;gap:8px;font-size:14px;}
.footer-contact a{display:inline-flex;align-items:center;gap:8px;color:var(--c-text-2);}
.footer-contact a:hover{color:var(--c-primary);}
.footer-contact i{color:var(--c-accent);font-size:13px;}
.footer-col h4{font-size:15px;font-weight:600;color:var(--c-text);margin:0 0 14px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--c-text-2);}
.footer-col ul a:hover{color:var(--c-primary);}
.subscribe-form{display:flex;flex-direction:column;gap:10px;margin:0;}
.subscribe-form input{
  height:44px;border-radius:var(--r-sm);border:1px solid #DCE5F0;
  background:#F5F8FC;padding:0 14px;font-size:14px;width:100%;color:var(--c-text);
  transition:border-color .2s ease,background .2s ease;
}
.subscribe-form input::placeholder{color:var(--c-text-3);}
.subscribe-form input:focus{outline:none;border-color:var(--c-primary);background:#fff;}
.subscribe-form input:invalid:not(:placeholder-shown){border-color:#D9534F;}
.footer-col .tip{font-size:13px;color:var(--c-text-3);line-height:1.7;margin:12px 0 0;}
.subscribe-tip{font-size:13px;color:var(--c-ok);min-height:18px;margin-top:8px;}
.subscribe-tip.err{color:#D9534F;}
.footer-bottom{
  border-top:1px solid var(--c-line);
  padding:20px 0 26px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--c-text-3);
}
.fb-links{display:flex;flex-wrap:wrap;gap:18px;}
.fb-links a{color:var(--c-text-3);font-size:13px;}
.fb-links a:hover{color:var(--c-primary);}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-links,.nav-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .article-aside{position:static;order:2;}
  .footer-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .section{padding-top:48px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .article-card{padding:28px 22px 30px;}
  .article-head h1{font-size:28px;}
  .article-body{font-size:16px;line-height:1.85;padding-top:24px;}
  .article-body h2{font-size:21px;margin-top:36px;}
  .article-body h3{font-size:18px;}
  .article-meta{font-size:13px;gap:8px 14px;}
  .meta-share{margin-left:0;}
  .cta-bar{padding:26px 22px;}
  .cta-bar h2{font-size:20px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
  .section-head h2{font-size:22px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px;}
  .site-footer{padding-top:44px;}
}
@media (max-width:520px){
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .article-head h1{font-size:24px;}
  .article-card{padding:22px 16px 24px;}
  .cta-actions .btn{width:100%;flex:1 1 100%;}
  .social-row{margin-left:0;width:100%;justify-content:flex-start;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .article-foot .tag-line{width:100%;}
  .article-foot .btn{width:100%;}
}

/* roulang page: category1 */
:root{
  --c-primary:#1F5C9E;
  --c-primary-d:#16436F;
  --c-primary-l:#E8F0FA;
  --c-accent:#D9764A;
  --c-accent-l:#FBEDE6;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-line:#E2E9F2;
  --c-text:#1B2733;
  --c-text-2:#5E6E80;
  --c-text-3:#8B99A8;
  --c-ok:#2F9E73;
  --c-warn:#E8A33D;
  --r-sm:10px;
  --r-md:16px;
  --r-lg:24px;
  --sh-1:0 6px 24px rgba(20,52,88,.07);
  --sh-2:0 14px 34px rgba(20,52,88,.12);
  --maxw:1180px;
  --hh:64px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-d);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid rgba(31,92,158,.5);outline-offset:2px;}
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:72px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
}
.section-head h2{
  font-size:32px;
  line-height:1.35;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--c-text);
}
.section-head p{
  margin-top:8px;
  font-size:15px;
  color:var(--c-text-2);
  max-width:620px;
}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--c-primary);
  white-space:nowrap;
}
.link-more i{transition:transform .2s ease,color .2s ease;}
.link-more:hover i{transform:translateX(3px);color:var(--c-accent);}

/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .25s ease;
}
.site-header.scrolled{box-shadow:0 6px 18px rgba(20,52,88,.06);}
.site-header.scrolled .header-inner{--hh:56px;}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:var(--hh);
  transition:height .25s ease;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
}
.brand-mark{
  width:36px;height:36px;
  border-radius:10px;
  background:var(--c-primary);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:16px;
  box-shadow:0 4px 12px rgba(31,92,158,.28);
  transition:transform .2s ease,background .2s ease;
}
.brand:hover .brand-mark{background:var(--c-primary-d);transform:translateY(-1px);}
.brand-text{
  font-size:20px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--c-text);
}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 auto;
  min-width:0;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:var(--hh);
  padding:0 10px;
  font-size:15px;
  color:var(--c-text-2);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:10px;right:10px;bottom:14px;
  height:2px;
  border-radius:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.header-tools{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.search-box{
  position:relative;
  width:200px;
}
.search-box input{
  width:100%;
  height:36px;
  border-radius:10px;
  border:1px solid transparent;
  background:#F2F5F9;
  padding:0 34px 0 12px;
  font-size:14px;
  color:var(--c-text);
  transition:border-color .2s ease,background .2s ease;
}
.search-box input::placeholder{color:var(--c-text-3);}
.search-box input:focus{
  outline:none;
  background:#fff;
  border-color:var(--c-primary);
}
.search-box i{
  position:absolute;
  right:12px;top:50%;
  transform:translateY(-50%);
  font-size:13px;
  color:var(--c-text-3);
  pointer-events:none;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  border-radius:var(--r-sm);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .18s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-d);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-primary:focus-visible{box-shadow:0 0 0 2px rgba(31,92,158,.28);}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-l);color:var(--c-primary-d);}
.btn-light{background:#fff;color:var(--c-primary);border-color:#fff;}
.btn-light:hover{background:#F2F7FD;color:var(--c-primary-d);}
.btn-sm{height:36px;padding:0 18px;font-size:14px;border-radius:10px;}
.btn-block{width:100%;}
.menu-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:10px;
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-text);
  font-size:16px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  transition:background .2s ease,border-color .2s ease;
}
.menu-toggle:hover{background:var(--c-primary-l);border-color:var(--c-primary-l);}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(20,52,88,.32);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
  z-index:130;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;
  top:0;right:0;
  width:300px;
  max-width:86vw;
  height:100%;
  background:#fff;
  z-index:140;
  transform:translateX(102%);
  transition:transform .3s ease;
  display:flex;
  flex-direction:column;
  padding:20px;
  box-shadow:-12px 0 40px rgba(20,52,88,.12);
  overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0);}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:16px;
  border-bottom:1px solid var(--c-line);
}
.drawer-close{
  width:36px;height:36px;
  border-radius:10px;
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-text-2);
  cursor:pointer;
  transition:background .2s ease,color .2s ease;
}
.drawer-close:hover{background:var(--c-primary-l);color:var(--c-primary);}
.drawer-links{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:16px 0;
}
.drawer-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:13px 12px;
  border-radius:10px;
  font-size:15px;
  color:var(--c-text-2);
  transition:background .2s ease,color .2s ease;
}
.drawer-links a:hover,
.drawer-links a.active{background:var(--c-primary-l);color:var(--c-primary);font-weight:600;}
.drawer-bottom{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--c-line);
  display:flex;
  flex-direction:column;
  gap:12px;
}
.drawer-bottom .search-box{width:100%;}
.drawer-bottom .search-box input{height:44px;}

/* 分类页 Hero */
.page-hero{
  position:relative;
  background-image:linear-gradient(100deg,rgba(246,248,251,.96) 0%,rgba(246,248,251,.9) 48%,rgba(232,240,250,.72) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--c-line);
  padding:44px 0 40px;
}
.page-hero .container{min-height:180px;display:flex;flex-direction:column;justify-content:center;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-text-3);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--c-text-2);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:#C6D1DE;}
.breadcrumb .current{color:var(--c-primary);font-weight:600;}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  align-self:flex-start;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--c-accent-l);
  color:var(--c-accent);
  font-size:13px;
  font-weight:600;
  margin-bottom:14px;
}
.page-hero h1{
  font-size:38px;
  line-height:1.25;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--c-text);
  max-width:820px;
}
.page-hero h1 .hl{color:var(--c-primary);}
.hero-sub{
  margin-top:14px;
  font-size:16px;
  color:var(--c-text-2);
  max-width:760px;
}
.hero-meta{
  margin-top:20px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:28px;
  padding:0 12px;
  border-radius:999px;
  background:#fff;
  border:1px solid var(--c-line);
  font-size:13px;
  color:var(--c-text-2);
}
.chip i{color:var(--c-primary);font-size:12px;}

/* 主体布局 */
.list-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:32px;
  align-items:start;
}
.entry-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.entry-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:18px;
  display:flex;
  gap:16px;
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.entry-card:hover{
  box-shadow:var(--sh-2);
  transform:translateY(-3px);
  border-color:#D6E3F2;
}
.entry-thumb{
  flex:0 0 124px;
  width:124px;
  height:124px;
  border-radius:12px;
  overflow:hidden;
  background:#EDF2F8;
  display:block;
}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.entry-card:hover .entry-thumb img{transform:scale(1.05);}
.entry-body{min-width:0;display:flex;flex-direction:column;}
.entry-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:22px;
  min-width:32px;
  padding:0 8px;
  border-radius:999px;
  background:var(--c-accent-l);
  color:var(--c-accent);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  margin-bottom:8px;
  align-self:flex-start;
}
.entry-title{
  font-size:17px;
  line-height:1.5;
  font-weight:600;
  color:var(--c-text);
}
.entry-title a{color:inherit;}
.entry-title a:hover{color:var(--c-primary);}
.entry-desc{
  margin-top:6px;
  font-size:14px;
  line-height:1.75;
  color:var(--c-text-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.entry-meta{
  margin-top:auto;
  padding-top:12px;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--c-text-3);
  flex-wrap:wrap;
}
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  white-space:nowrap;
}
.badge-cat{background:var(--c-primary-l);color:var(--c-primary);}
.badge-accent{background:var(--c-accent-l);color:var(--c-accent);}
.entry-meta .go{margin-left:auto;color:var(--c-primary);transition:transform .2s ease,color .2s ease;}
.entry-card:hover .entry-meta .go{transform:translateX(3px);color:var(--c-accent);}

/* 侧栏 */
.list-side{
  position:sticky;
  top:88px;
  display:flex;
  flex-direction:column;
  gap:24px;
}
.side-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:22px;
}
.side-card h3{
  font-size:17px;
  font-weight:700;
  color:var(--c-text);
  display:flex;
  align-items:center;
  gap:8px;
  padding-bottom:14px;
  border-bottom:1px solid var(--c-line);
  margin-bottom:6px;
}
.side-card h3 i{color:var(--c-accent);font-size:14px;}
.hot-list li{border-bottom:1px dashed #EDF2F8;}
.hot-list li:last-child{border-bottom:0;}
.hot-list a{
  display:flex;
  align-items:flex-start;
  gap:10px;
  padding:12px 0;
  font-size:14px;
  line-height:1.6;
  color:var(--c-text);
  transition:color .2s ease,transform .2s ease;
}
.hot-list a:hover{color:var(--c-primary);transform:translateX(3px);}
.hot-rank{
  flex:0 0 20px;
  height:20px;
  border-radius:6px;
  background:#F2F5F9;
  color:var(--c-text-3);
  font-size:12px;
  font-weight:700;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  margin-top:2px;
}
.hot-list li:nth-child(-n+3) .hot-rank{background:var(--c-primary-l);color:var(--c-primary);}
.side-cta{
  background:linear-gradient(160deg,#EFF5FC 0%,#FFFFFF 70%);
}
.side-cta h3{border-bottom:0;padding-bottom:4px;margin-bottom:0;}
.side-cta p{
  font-size:14px;
  color:var(--c-text-2);
  line-height:1.75;
  margin:8px 0 18px;
}
.side-note{
  margin-top:12px;
  font-size:13px;
  color:var(--c-text-3);
  text-align:center;
}

/* 步骤条 */
.step-band{
  margin-top:56px;
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  padding:32px;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.step-item{position:relative;padding-left:56px;}
.step-idx{
  position:absolute;
  left:0;top:0;
  width:40px;height:40px;
  border-radius:12px;
  background:var(--c-primary-l);
  color:var(--c-primary);
  font-weight:700;
  font-size:15px;
  display:flex;
  align-items:center;
  justify-content:center;
}
.step-item h3{font-size:16px;font-weight:600;color:var(--c-text);}
.step-item p{margin-top:6px;font-size:14px;line-height:1.75;color:var(--c-text-2);}

/* 相关推荐 */
.rail{
  display:flex;
  gap:24px;
  overflow-x:auto;
  padding-bottom:12px;
  scroll-snap-type:x mandatory;
  scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:#D6E3F2;border-radius:6px;}
.rail-card{
  flex:0 0 calc((100% - 72px) / 3.5);
  min-width:240px;
  scroll-snap-align:start;
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:box-shadow .22s ease,transform .22s ease;
}
.rail-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);}
.rail-thumb{position:relative;aspect-ratio:16/10;background:#EDF2F8;overflow:hidden;}
.rail-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rail-card:hover .rail-thumb img{transform:scale(1.04);}
.rail-body{padding:16px;}
.rail-body h3{font-size:16px;font-weight:600;line-height:1.5;color:var(--c-text);}
.rail-body h3 a{color:inherit;}
.rail-body h3 a:hover{color:var(--c-primary);}
.rail-body .rail-meta{margin-top:10px;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);}

/* 收藏与分享 */
.share-cta{
  background:var(--c-primary-l);
  border-radius:var(--r-lg);
  padding:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.share-cta h2{font-size:26px;font-weight:700;color:var(--c-primary-d);line-height:1.4;}
.share-cta p{margin-top:8px;font-size:15px;color:var(--c-text-2);max-width:560px;}
.share-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;flex-wrap:wrap;}
.social-row{display:flex;align-items:center;gap:8px;margin-left:4px;}
.social-btn{
  width:44px;height:44px;
  border-radius:50%;
  background:#fff;
  color:var(--c-primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid #D6E3F2;
  transition:background .2s ease,color .2s ease,transform .2s ease,border-color .2s ease;
}
.social-btn:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary);transform:translateY(-2px);}

/* FAQ */
.faq-list{max-width:840px;}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;
  background:none;
  border:0;
  padding:22px 40px 22px 0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  color:var(--c-text);
  cursor:pointer;
  position:relative;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-primary);}
.faq-q .faq-icon{
  position:absolute;
  right:4px;top:50%;
  transform:translateY(-50%) rotate(0deg);
  color:var(--c-text-3);
  font-size:14px;
  transition:transform .24s ease,color .24s ease;
}
.faq-item.open .faq-q{color:var(--c-primary);}
.faq-item.open .faq-q .faq-icon{transform:translateY(-50%) rotate(180deg);color:var(--c-primary);}
.faq-a{
  height:0;
  overflow:hidden;
  transition:height .24s ease;
}
.faq-a-inner{
  padding:0 40px 24px 0;
  font-size:15px;
  line-height:1.8;
  color:var(--c-text-2);
}
.faq-hint{
  margin-top:18px;
  font-size:14px;
  color:var(--c-text-3);
}
.faq-hint a{font-weight:600;}

/* 页脚 */
.site-footer{
  background:#fff;
  border-top:1px solid var(--c-line);
  padding-top:64px;
  margin-top:24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr 1.35fr;
  gap:32px;
}
.footer-brand p{
  margin-top:14px;
  font-size:14px;
  line-height:1.75;
  color:var(--c-text-2);
  max-width:280px;
}
.footer-contact{margin-top:16px;display:flex;flex-direction:column;gap:8px;}
.footer-contact a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--c-text-2);
}
.footer-contact a:hover{color:var(--c-primary);}
.footer-contact i{color:var(--c-primary);font-size:13px;}
.footer-col h4{
  font-size:15px;
  font-weight:700;
  color:var(--c-text);
  margin-bottom:14px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li a{
  font-size:14px;
  color:var(--c-text-2);
  transition:color .2s ease,padding-left .2s ease;
}
.footer-col li a:hover{color:var(--c-primary);padding-left:3px;}
.subscribe-form{display:flex;flex-direction:column;gap:10px;}
.subscribe-form input{
  width:100%;
  height:44px;
  border-radius:var(--r-sm);
  border:1px solid #DCE5F0;
  background:#F5F8FC;
  padding:0 12px;
  font-size:14px;
  color:var(--c-text);
  transition:border-color .2s ease,background .2s ease;
}
.subscribe-form input::placeholder{color:var(--c-text-3);}
.subscribe-form input:focus{outline:none;border-color:var(--c-primary);background:#fff;}
.subscribe-form input.error{border-color:#D9534F;}
.subscribe-form .btn{height:44px;}
.tip{margin-top:10px;font-size:13px;line-height:1.7;color:var(--c-text-3);}
.subscribe-tip{font-size:13px;color:var(--c-ok);min-height:20px;}
.footer-bottom{
  margin-top:48px;
  padding:20px 0;
  border-top:1px solid var(--c-line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:13px;
  color:var(--c-text-3);
  flex-wrap:wrap;
}
.fb-links{display:flex;gap:18px;flex-wrap:wrap;}
.fb-links a{color:var(--c-text-3);}
.fb-links a:hover{color:var(--c-primary);}

/* 响应式 */
@media (max-width:1024px){
  .nav-links{display:none;}
  .search-box{display:none;}
  .header-tools .btn{display:none;}
  .menu-toggle{display:inline-flex;}
  .header-inner{height:60px;gap:16px;}
  .section{padding:56px 0;}
  .list-layout{grid-template-columns:minmax(0,1fr);gap:28px;}
  .list-side{position:static;}
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .step-band{grid-template-columns:1fr;padding:26px;margin-top:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-brand{grid-column:1 / -1;}
  .share-cta{flex-direction:column;align-items:flex-start;padding:32px;}
  .rail-card{flex:0 0 46%;}
  .page-hero h1{font-size:32px;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .section{padding:48px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;}
  .section-head h2{font-size:24px;}
  .entry-grid{grid-template-columns:1fr;}
  .entry-card{flex-direction:row;}
  .page-hero{padding:32px 0;}
  .page-hero h1{font-size:28px;}
  .hero-sub{font-size:15px;}
  .rail-card{flex:0 0 80%;}
  .share-cta h2{font-size:22px;}
  .faq-q{font-size:16px;}
}
@media (max-width:640px){
  .entry-card{flex-direction:column;padding:16px;}
  .entry-thumb{width:100%;flex:0 0 auto;height:auto;aspect-ratio:16/10;}
  .entry-grid{gap:16px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .share-actions{width:100%;}
  .share-actions .btn{flex:1 1 100%;}
  .social-row{margin-left:0;}
  .step-item{padding-left:0;padding-top:52px;}
  .rail-card{flex:0 0 88%;}
  .page-hero h1{font-size:26px;}
}

/* roulang page: category2 */
:root{
  --c-primary:#1F5C9E;
  --c-primary-d:#16436F;
  --c-primary-l:#E8F0FA;
  --c-accent:#D9764A;
  --c-accent-l:rgba(217,118,74,.12);
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-line:#E2E9F2;
  --c-text:#1B2733;
  --c-text-2:#5E6E80;
  --c-text-3:#8B99A8;
  --c-success:#2F9E73;
  --c-warn:#E8A33D;
  --r-card:16px;
  --r-btn:10px;
  --sh-card:0 6px 24px rgba(20,52,88,.07);
  --sh-hover:0 14px 34px rgba(20,52,88,.12);
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--ease)}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid rgba(31,92,158,.35);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;line-height:1.35;letter-spacing:.01em}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
ul,ol{margin:0 0 16px;padding-left:22px}
ul:last-child,ol:last-child{margin-bottom:0}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font-family:inherit}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}

/* ============ 按钮与标签 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(31,92,158,.18)}
.btn-primary:hover{background:var(--c-primary-d);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-secondary{background:#fff;color:var(--c-primary);border:1px solid var(--c-primary)}
.btn-secondary:hover{background:var(--c-primary-l)}
.btn-secondary:active{transform:translateY(1px)}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:9px}
.btn-block{display:flex;width:100%}
.link-more{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--c-primary);font-size:15px;font-weight:600;white-space:nowrap;
}
.link-more i{transition:transform var(--ease),color var(--ease);font-size:13px}
.link-more:hover i{transform:translateX(3px);color:var(--c-accent)}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:999px;font-size:13px;font-weight:500;line-height:1;
}
.badge-primary{background:var(--c-primary-l);color:var(--c-primary)}
.badge-accent{background:var(--c-accent-l);color:var(--c-accent)}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.1em;
  color:var(--c-accent);margin-bottom:10px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(20,52,88,.06)}
.header-inner{
  display:flex;align-items:center;gap:26px;
  height:64px;transition:height var(--ease);
}
.site-header.is-scrolled .header-inner{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-size:14px;
  box-shadow:0 4px 12px rgba(31,92,158,.25);
}
.brand-text{font-size:20px;font-weight:700;letter-spacing:.02em;color:var(--c-text)}
.nav-links{display:flex;align-items:center;gap:26px;margin-right:auto}
.nav-link{position:relative;font-size:15px;color:var(--c-text-2);padding:6px 0;transition:color var(--ease)}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--c-primary);border-radius:2px;transition:width 180ms ease;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{width:100%;background:var(--c-primary)}
.header-tools{display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;width:200px;height:36px;
  padding:0 12px;border-radius:10px;background:#F2F5F9;
  border:1px solid transparent;transition:border-color var(--ease),background var(--ease);
}
.search-box i{font-size:13px;color:var(--c-text-3)}
.search-box input{
  width:100%;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--c-text);
}
.search-box input::placeholder{color:var(--c-text-3)}
.search-box:focus-within{border-color:var(--c-primary);background:#fff}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  background:var(--c-primary-l);color:var(--c-primary);
  align-items:center;justify-content:center;font-size:16px;
  transition:background var(--ease);
}
.nav-toggle:hover{background:#dbe8f7}

/* 移动端抽屉 */
.panel-mask{
  position:fixed;inset:0;background:rgba(20,52,88,.34);z-index:70;
  opacity:0;pointer-events:none;transition:opacity .28s ease;
}
.panel-mask.open{opacity:1;pointer-events:auto}
.mobile-panel{
  position:fixed;top:0;right:0;height:100%;width:320px;max-width:86vw;
  background:#fff;z-index:80;padding:20px;overflow-y:auto;
  transform:translateX(102%);transition:transform .28s ease;
  box-shadow:-12px 0 40px rgba(20,52,88,.16);
}
.mobile-panel.open{transform:translateX(0)}
.mp-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.mp-close{
  width:38px;height:38px;border-radius:10px;background:#F2F5F9;color:var(--c-text-2);
  display:grid;place-items:center;transition:background var(--ease),color var(--ease);
}
.mp-close:hover{background:var(--c-primary-l);color:var(--c-primary)}
.mp-nav{display:grid;margin-bottom:20px}
.mp-nav a{
  padding:14px 4px;font-size:15px;color:var(--c-text-2);
  border-bottom:1px solid var(--c-line);transition:color var(--ease),padding-left var(--ease);
}
.mp-nav a:hover{color:var(--c-primary);padding-left:8px}
.mp-nav a.active{color:var(--c-primary);font-weight:600}
.mp-search{display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;border-radius:10px;background:#F5F8FC;border:1px solid #DCE5F0;margin-bottom:12px}
.mp-search i{color:var(--c-text-3);font-size:13px}
.mp-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px}

/* ============ Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  padding:46px 0 56px;
  background-image:linear-gradient(96deg,rgba(246,248,251,.97) 0%,rgba(246,248,251,.88) 46%,rgba(246,248,251,.62) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center right;
  border-bottom:1px solid var(--c-line);
}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:14px;color:var(--c-text-3);margin-bottom:18px;
}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:#C3CEDB}
.breadcrumb .current{color:var(--c-primary);font-weight:500}
.cat-hero h1{
  font-size:clamp(28px,4vw,40px);line-height:1.25;letter-spacing:.02em;
  margin:14px 0 16px;max-width:22em;
}
.hero-lead{
  font-size:16px;line-height:1.9;color:var(--c-text-2);
  max-width:64ch;margin-bottom:8px;
}
.hero-stats{
  display:flex;gap:44px;flex-wrap:wrap;
  margin-top:30px;padding-top:24px;border-top:1px solid rgba(31,92,158,.12);
}
.stat-item{min-width:96px}
.stat-num{
  display:block;font-size:26px;font-weight:700;line-height:1.2;
  color:var(--c-accent);font-feature-settings:"tnum";
}
.stat-label{display:block;font-size:13px;color:var(--c-text-2);margin-top:4px}

/* ============ 通用板块 ============ */
.section{padding:clamp(48px,7vw,88px) 0}
.section-alt{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:32px;flex-wrap:wrap;
}
.section-head h2{font-size:clamp(24px,3.2vw,32px);line-height:1.35}
.section-desc{font-size:15px;line-height:1.8;color:var(--c-text-2);margin-top:10px;max-width:62ch}

/* ============ 封面网格 ============ */
.cover-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.cover-card{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.cover-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:#D4E1F0}
.cover-media{
  display:block;aspect-ratio:16/10;background:#EDF2F8;overflow:hidden;
}
.cover-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.cover-card:hover .cover-media img{transform:scale(1.045)}
.cover-body{padding:18px 20px 22px}
.cover-title{font-size:18px;font-weight:600;line-height:1.5;transition:color var(--ease)}
.cover-card:hover .cover-title{color:var(--c-primary)}
.cover-meta{margin:6px 0 0;font-size:13px;color:var(--c-text-3);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.cover-meta .dot{width:3px;height:3px;border-radius:50%;background:#C3CEDB}

/* ============ 图文对照 ============ */
.split{display:grid;grid-template-columns:1.02fr 1fr;gap:48px;align-items:center}
.split-media{
  border-radius:var(--r-card);overflow:hidden;background:#EDF2F8;
  box-shadow:var(--sh-card);
}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split-body h2{font-size:clamp(24px,3vw,30px);margin-bottom:14px}
.split-body p{font-size:15.5px;line-height:1.9;color:var(--c-text-2)}
.step-list{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:18px}
.step-item{display:flex;gap:16px;align-items:flex-start}
.step-num{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;
  background:var(--c-primary-l);color:var(--c-primary);
  display:grid;place-items:center;font-weight:700;font-size:15px;
  font-feature-settings:"tnum";
}
.step-title{display:block;font-size:16px;font-weight:600;line-height:1.6;margin-bottom:2px}
.step-text{font-size:14.5px;line-height:1.8;color:var(--c-text-2);margin:0}

/* ============ 横向推荐 ============ */
.rail{
  display:flex;gap:24px;overflow-x:auto;padding-bottom:10px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:#D6E1EE;border-radius:999px}
.rail-card{
  flex:0 0 300px;scroll-snap-align:start;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);
  transition:transform var(--ease),box-shadow var(--ease);
}
.rail-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover)}
.rail-media{display:block;aspect-ratio:16/10;background:#EDF2F8;overflow:hidden}
.rail-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.rail-card:hover .rail-media img{transform:scale(1.045)}
.rail-body{padding:16px 18px 18px}
.rail-title{font-size:16px;font-weight:600;line-height:1.6;margin-bottom:10px;transition:color var(--ease)}
.rail-card:hover .rail-title{color:var(--c-primary)}

/* ============ 收藏分享 ============ */
.share-band{background:var(--c-primary-l);padding:clamp(36px,5vw,56px) 0}
.share-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.share-inner h2{font-size:clamp(22px,2.6vw,28px);margin-bottom:8px}
.share-inner p{font-size:15px;color:var(--c-text-2);max-width:48ch}
.band-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.social{
  width:44px;height:44px;border-radius:50%;
  background:#fff;border:1px solid var(--c-line);color:var(--c-primary);
  display:grid;place-items:center;font-size:15px;
  transition:background var(--ease),color var(--ease),transform var(--ease),border-color var(--ease);
}
.social:hover{background:var(--c-primary);border-color:var(--c-primary);color:#fff;transform:translateY(-2px)}
.share-tip{font-size:13px;color:var(--c-primary-d);margin-top:12px;min-height:20px}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--c-line);padding-top:56px;margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1.2fr;
  gap:32px;padding-bottom:8px;
}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-text-2);margin:14px 0 18px;max-width:34ch}
.footer-contact{display:grid;gap:8px}
.footer-contact a{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--c-text-2);
}
.footer-contact a:hover{color:var(--c-primary)}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.footer-col li a{
  display:inline-block;font-size:14px;color:var(--c-text-2);
  transition:color var(--ease),transform var(--ease);
}
.footer-col li a:hover{color:var(--c-primary);transform:translateX(2px)}
.subscribe-form input{
  width:100%;height:44px;margin-bottom:10px;padding:0 14px;
  border-radius:10px;border:1px solid #DCE5F0;background:#F5F8FC;
  font-size:14px;color:var(--c-text);outline:none;
  transition:border-color var(--ease),background var(--ease);
}
.subscribe-form input::placeholder{color:var(--c-text-3)}
.subscribe-form input:focus{border-color:var(--c-primary);background:#fff}
.tip{font-size:13px;line-height:1.7;color:var(--c-text-3);margin-top:10px}
.subscribe-tip{font-size:13px;color:var(--c-success);min-height:20px;margin-top:6px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;margin-top:40px;padding:20px 0;
  border-top:1px solid var(--c-line);
  font-size:13px;color:var(--c-text-3);
}
.fb-links{display:flex;gap:20px;flex-wrap:wrap}
.fb-links a:hover{color:var(--c-primary)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .nav-links,.search-box{display:none}
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
  .split{grid-template-columns:1fr;gap:32px}
  .section-alt .split-media{order:-1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cat-hero{padding:36px 0 46px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .cover-grid{grid-template-columns:1fr}
  .hero-stats{gap:28px}
  .stat-item{min-width:88px}
  .share-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:640px){
  .rail{flex-direction:column;overflow:visible;scroll-snap-type:none}
  .rail-card{flex:1 1 auto;width:100%}
  .cat-hero h1{max-width:none}
  .footer-grid{grid-template-columns:1fr}
  .band-actions{width:100%}
  .band-actions .btn{flex:1 1 auto}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .fb-links{gap:14px}
}
@media (max-width:520px){
  .header-inner{height:60px;gap:14px}
  .brand-text{font-size:18px}
  .hero-stats{gap:22px}
  .stat-num{font-size:23px}
  .cover-body{padding:16px 16px 18px}
  .btn{height:46px;padding:0 20px}
}

/* roulang page: category3 */
:root{
  --c-primary:#1F5C9E;
  --c-primary-d:#16436F;
  --c-primary-l:#E8F0FA;
  --c-accent:#D9764A;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-line:#E2E9F2;
  --c-text:#1B2733;
  --c-text-2:#5E6E80;
  --c-text-3:#8B99A8;
  --ok:#2F9E73;
  --warn:#E8A33D;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 6px 24px rgba(20,52,88,.07);
  --shadow-h:0 14px 34px rgba(20,52,88,.12);
  --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;}
input,button,textarea{font-size:100%;}
:focus-visible{outline:2px solid rgba(31,92,158,.55);outline-offset:2px;}
.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:72px 0;}
.section-tight{padding:48px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
  flex-wrap:wrap;
}
.section-head h2{font-size:32px;line-height:1.35;font-weight:700;letter-spacing:.01em;}
.section-head .eyebrow{
  display:block;
  font-size:13px;
  letter-spacing:.14em;
  color:var(--c-accent);
  font-weight:700;
  margin-bottom:6px;
  text-transform:uppercase;
}
.section-head p.sub{color:var(--c-text-2);font-size:15px;max-width:640px;margin-top:8px;}
.link-arrow{
  color:var(--c-primary);
  font-size:15px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:color .2s;
}
.link-arrow i{transition:transform .2s;}
.link-arrow:hover{color:var(--c-accent);}
.link-arrow:hover i{transform:translateX(3px);}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease;
}
.site-header.scrolled{box-shadow:0 6px 18px rgba(20,52,88,.06);}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:64px;
  transition:height .22s ease;
}
.site-header.scrolled .header-inner{height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:var(--c-primary);
  color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;
  box-shadow:0 4px 12px rgba(31,92,158,.28);
}
.brand-text{font-size:20px;font-weight:700;color:var(--c-text);letter-spacing:.01em;}
.nav-links{display:flex;align-items:center;gap:24px;flex:1;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--c-text-2);
  padding:6px 0;
  transition:color .18s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:-1px;
  height:2px;width:0;
  background:var(--c-primary);
  transition:width .18s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{width:100%;}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{width:100%;}
.header-right{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.nav-search{position:relative;}
.nav-search i{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  font-size:13px;color:var(--c-text-3);pointer-events:none;
}
.nav-search input{
  width:200px;height:36px;
  border-radius:var(--radius-sm);
  background:#F2F5F9;
  border:1px solid transparent;
  padding:0 12px 0 34px;
  font-size:14px;color:var(--c-text);
  transition:border-color .18s,background .18s;
}
.nav-search input::placeholder{color:var(--c-text-3);}
.nav-search input:focus{
  outline:none;
  background:#fff;
  border-color:var(--c-primary);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;}
.btn-primary:hover{background:var(--c-primary-d);transform:translateY(-1px);box-shadow:0 10px 22px rgba(31,92,158,.24);}
.btn-primary:active{transform:none;box-shadow:none;}
.btn-ghost{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-ghost:hover{background:var(--c-primary-l);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.header-cta{height:36px;padding:0 18px;font-size:14px;border-radius:var(--radius-sm);}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:var(--radius-sm);
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-primary);
  cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--c-primary-l);}
.nav-toggle:active{transform:scale(.97);}

/* ---------- hero ---------- */
.page-hero{
  background:linear-gradient(180deg,#F6F8FB 0%,#FFFFFF 100%);
  border-bottom:1px solid var(--c-line);
  padding:44px 0 52px;
}
.hero-inner{
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:44px;
  align-items:center;
  min-height:240px;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--c-text-3);margin-bottom:18px;
}
.breadcrumb a{color:var(--c-text-3);transition:color .18s;}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .current{color:var(--c-primary);font-weight:600;}
.page-hero h1{
  font-size:42px;
  line-height:1.25;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--c-text);
  margin-bottom:16px;
}
.page-hero .lede{font-size:16px;color:var(--c-text-2);max-width:620px;margin-bottom:8px;}
.page-hero .lede + .lede{margin-bottom:0;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.badge{
  display:inline-flex;align-items:center;
  height:24px;padding:0 10px;
  border-radius:999px;
  font-size:13px;
  line-height:1;
  white-space:nowrap;
}
.badge-primary{background:var(--c-primary-l);color:var(--c-primary);}
.badge-accent{background:#FBEDE6;color:var(--c-accent);}
.badge-soft{background:#F2F5F9;color:var(--c-text-2);}
.hero-media{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  aspect-ratio:16/10;
  background:#EDF2F8 url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  box-shadow:var(--shadow);
}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,52,88,0) 45%,rgba(20,52,88,.62) 100%);
}
.hero-media .media-caption{
  position:absolute;left:20px;right:20px;bottom:18px;
  z-index:2;color:#fff;
}
.hero-media .media-caption strong{display:block;font-size:18px;font-weight:600;margin-bottom:2px;}
.hero-media .media-caption span{font-size:13px;opacity:.86;}
.media-chip{
  position:absolute;top:16px;left:16px;z-index:2;
  background:rgba(255,255,255,.94);
  color:var(--c-primary);
  font-size:13px;font-weight:600;
  height:28px;padding:0 12px;border-radius:999px;
  display:inline-flex;align-items:center;gap:6px;
}

/* ---------- filters + index ---------- */
.filter-bar{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;flex-wrap:wrap;
  margin-bottom:8px;
}
.filter-pills{display:flex;flex-wrap:wrap;gap:12px;}
.pill{
  height:38px;padding:0 18px;
  border-radius:999px;
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-text-2);
  font-size:14px;
  cursor:pointer;
  transition:border-color .2s,color .2s,background .2s,box-shadow .2s;
}
.pill:hover{border-color:var(--c-primary);color:var(--c-primary);}
.pill.is-active{
  border-color:var(--c-primary);
  color:var(--c-primary);
  background:var(--c-primary-l);
  font-weight:600;
  box-shadow:0 0 0 3px rgba(31,92,158,.08);
}
.filter-count{font-size:14px;color:var(--c-text-3);}
.filter-count em{font-style:normal;color:var(--c-accent);font-weight:700;font-size:16px;}

.index-panel{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;
  margin-top:24px;
}
.index-row{
  display:grid;
  grid-template-columns:56px 1fr 118px 122px;
  gap:20px;
  align-items:center;
  padding:20px 24px;
  border-bottom:1px solid var(--c-line);
  transition:background .2s ease,transform .2s ease;
}
.index-row:last-child{border-bottom:0;}
.index-row:hover{background:#F2F6FC;transform:translateX(4px);}
.idx-num{
  font-family:Inter,system-ui,sans-serif;
  font-size:15px;font-weight:700;
  color:var(--c-accent);
  letter-spacing:.04em;
}
.idx-body h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:4px;}
.idx-body p{font-size:14px;line-height:1.7;color:var(--c-text-2);max-width:64ch;}
.idx-link{
  display:inline-flex;align-items:center;justify-content:flex-end;gap:6px;
  font-size:14px;font-weight:600;color:var(--c-primary);
  transition:color .2s;
}
.idx-link i{transition:transform .2s;}
.index-row:hover .idx-link{color:var(--c-accent);}
.index-row:hover .idx-link i{transform:translateX(3px);}

/* ---------- split notes ---------- */
.notes-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
.note-card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--shadow);
  transition:box-shadow .22s ease,transform .22s ease;
}
.note-card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.note-card .note-icon{
  width:44px;height:44px;border-radius:12px;
  background:var(--c-primary-l);
  color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:17px;margin-bottom:16px;
}
.note-card.accent .note-icon{background:#FBEDE6;color:var(--c-accent);}
.note-card h3{font-size:22px;font-weight:600;line-height:1.5;margin-bottom:10px;}
.note-card p{font-size:15px;color:var(--c-text-2);line-height:1.8;}
.note-list{margin-top:16px;display:flex;flex-direction:column;gap:10px;}
.note-list li{
  position:relative;
  padding-left:18px;
  font-size:15px;
  color:var(--c-text);
  line-height:1.75;
}
.note-list li::before{
  content:"";
  position:absolute;left:0;top:11px;
  width:7px;height:7px;border-radius:2px;
  background:var(--c-primary);
}
.note-card.accent .note-list li::before{background:var(--c-accent);}
.note-list li span{color:var(--c-text-2);}

/* ---------- flow ---------- */
.flow{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:32px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
  position:relative;
}
.flow-step{position:relative;padding-left:56px;}
.flow-step .step-no{
  position:absolute;left:0;top:0;
  width:40px;height:40px;border-radius:50%;
  background:var(--c-primary);
  color:#fff;font-weight:700;font-size:15px;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:Inter,system-ui,sans-serif;
}
.flow-step:nth-child(2) .step-no{background:var(--c-accent);}
.flow-step:nth-child(3) .step-no{background:var(--c-primary-d);}
.flow-step h3{font-size:18px;font-weight:600;margin-bottom:6px;}
.flow-step p{font-size:14px;line-height:1.75;color:var(--c-text-2);}

/* ---------- related ---------- */
.related-scroll{
  display:flex;
  gap:20px;
  overflow-x:auto;
  padding:4px 4px 12px;
  scroll-snap-type:x mandatory;
}
.related-scroll::-webkit-scrollbar{height:6px;}
.related-scroll::-webkit-scrollbar-thumb{background:#D7E1EC;border-radius:999px;}
.rel-card{
  flex:0 0 calc((100% - 60px) / 3.4);
  min-width:260px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:box-shadow .22s ease,transform .22s ease;
  scroll-snap-align:start;
  display:block;
}
.rel-card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.rel-card .rel-thumb{
  aspect-ratio:16/10;
  background:#EDF2F8 center/cover no-repeat;
}
.rel-card .rel-body{padding:18px 20px 20px;}
.rel-card .rel-body h3{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:8px;}
.rel-card .rel-body .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.rel-card .rel-body .meta span{font-size:13px;color:var(--c-text-3);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;
  background:none;border:0;
  font-size:17px;font-weight:600;color:var(--c-text);
  text-align:left;cursor:pointer;
  transition:color .2s;
}
.faq-q:hover{color:var(--c-primary);}
.faq-q i{font-size:14px;color:var(--c-text-3);transition:transform .24s ease,color .2s;}
.faq-item.open .faq-q{color:var(--c-primary);}
.faq-item.open .faq-q i{transform:rotate(180deg);color:var(--c-primary);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s ease;
}
.faq-item.open .faq-a{max-height:320px;}
.faq-a p{
  font-size:15px;
  line-height:1.8;
  color:var(--c-text-2);
  padding:0 0 22px;
  max-width:78ch;
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--c-primary-l);
  border-radius:var(--radius-lg);
  padding:36px 40px;
  display:grid;
  grid-template-columns:1fr auto;
  gap:28px;
  align-items:center;
}
.cta-band h2{font-size:26px;font-weight:700;line-height:1.4;margin-bottom:6px;}
.cta-band p{font-size:15px;color:var(--c-text-2);}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.social-row{display:flex;gap:10px;}
.social-btn{
  width:44px;height:44px;
  border-radius:50%;
  background:#fff;
  color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;
  border:1px solid rgba(31,92,158,.14);
  transition:background .2s,color .2s,transform .2s;
}
.social-btn:hover{background:var(--c-primary);color:#fff;transform:translateY(-2px);}
.social-btn:active{transform:none;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--c-surface);
  border-top:1px solid var(--c-line);
  padding:64px 0 0;
  margin-top:8px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr 1.3fr;
  gap:32px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--c-text-2);max-width:280px;margin-bottom:16px;}
.footer-contact{display:flex;flex-direction:column;gap:8px;}
.footer-contact a{
  font-size:14px;color:var(--c-text-2);
  display:inline-flex;align-items:center;gap:8px;
  transition:color .2s;
}
.footer-contact a:hover{color:var(--c-primary);}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:14px;color:var(--c-text);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--c-text-2);transition:color .2s;}
.footer-col ul a:hover{color:var(--c-primary);}
.subscribe-form{display:flex;flex-direction:column;gap:10px;}
.subscribe-form input{
  height:44px;
  border-radius:var(--radius-sm);
  border:1px solid #DCE5F0;
  background:#F5F8FC;
  padding:0 14px;
  font-size:14px;
  color:var(--c-text);
  transition:border-color .18s,background .18s;
}
.subscribe-form input::placeholder{color:var(--c-text-3);}
.subscribe-form input:focus{outline:none;border-color:var(--c-primary);background:#fff;}
.subscribe-form .btn{height:44px;padding:0 20px;font-size:14px;}
.footer-col .tip{font-size:13px;color:var(--c-text-3);line-height:1.7;margin-top:10px;}
.subscribe-tip{font-size:13px;color:var(--ok);min-height:20px;margin-top:6px;}
.footer-bottom{
  border-top:1px solid var(--c-line);
  padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--c-text-3);
}
.fb-links{display:flex;gap:20px;flex-wrap:wrap;}
.fb-links a{color:var(--c-text-3);transition:color .2s;}
.fb-links a:hover{color:var(--c-primary);}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .header-inner{height:60px;gap:16px;}
  .nav-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;
    top:60px;left:0;right:0;bottom:0;
    background:#fff;
    flex-direction:column;
    align-items:flex-start;
    gap:2px;
    padding:18px 24px 40px;
    transform:translateX(-100%);
    transition:transform .28s ease;
    overflow-y:auto;
    z-index:70;
    box-shadow:0 20px 40px rgba(20,52,88,.14);
  }
  .nav-links.open{transform:translateX(0);}
  .nav-link{width:100%;padding:14px 0;font-size:16px;border-bottom:1px solid var(--c-line);}
  .nav-link::after{display:none;}
  .nav-link.active{color:var(--c-primary);}
  .hero-inner{grid-template-columns:1fr;gap:28px;}
  .page-hero h1{font-size:34px;}
  .section{padding:56px 0;}
  .index-row{grid-template-columns:44px 1fr 110px;gap:16px;}
  .index-row .idx-link{display:none;}
  .flow{grid-template-columns:1fr;gap:22px;padding:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-band{grid-template-columns:1fr;padding:30px;}
  .rel-card{flex:0 0 62%;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .page-hero{padding:32px 0 36px;}
  .page-hero h1{font-size:28px;}
  .section{padding:48px 0;}
  .section-head h2{font-size:24px;}
  .section-head{margin-bottom:24px;}
  .notes-grid{grid-template-columns:1fr;}
  .note-card{padding:22px;}
  .index-row{grid-template-columns:38px 1fr;gap:12px;padding:18px 16px;}
  .index-row .badge{grid-column:2;justify-self:start;margin-top:8px;}
  .rel-card{flex:0 0 84%;min-width:0;}
  .cta-actions{width:100%;}
  .cta-band .btn{flex:1;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-brand p{max-width:none;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;}
}
@media (max-width:520px){
  .page-hero h1{font-size:26px;}
  .brand-text{font-size:18px;}
  .header-cta{display:none;}
  .hero-media{aspect-ratio:4/3;}
  .filter-pills .pill{flex:1 1 auto;justify-content:center;display:inline-flex;align-items:center;}
  .cta-band{padding:24px;}
  .cta-band h2{font-size:21px;}
  .cta-actions .btn{width:100%;}
  .social-row{width:100%;justify-content:flex-start;}
}

/* roulang page: category4 */
:root{
  --c-primary:#1F5C9E;
  --c-primary-d:#16436F;
  --c-primary-l:#E8F0FA;
  --c-accent:#D9764A;
  --c-accent-l:#FBEDE6;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-line:#E2E9F2;
  --c-line-2:#DCE5F0;
  --c-text:#1B2733;
  --c-text-2:#5E6E80;
  --c-text-3:#8B99A8;
  --c-success:#2F9E73;
  --c-warn:#E8A33D;
  --c-field:#F5F8FC;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;
  --shadow-1:0 6px 24px rgba(20,52,88,.07);
  --shadow-2:0 14px 34px rgba(20,52,88,.12);
  --shadow-nav:0 6px 18px rgba(20,52,88,.06);
  --container:1180px;
  --gap:24px;
  --sec-pad:88px;
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.35;font-weight:700;letter-spacing:.01em}
:focus-visible{outline:2px solid rgba(31,92,158,.45);outline-offset:2px}
::selection{background:var(--c-primary-l);color:var(--c-primary-d)}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:var(--sec-pad) 0}
.section-tight{padding:64px 0}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:32px;
}
.section-head h2{
  font-size:32px;
  line-height:1.35;
  color:var(--c-text);
}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--c-accent);
  text-transform:uppercase;
  margin-bottom:10px;
}
.section-head .eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--c-accent);
  border-radius:2px;
}
.section-sub{
  font-size:15px;
  color:var(--c-text-2);
  max-width:640px;
  margin-top:12px;
  line-height:1.8;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 28px;
  border-radius:var(--radius-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,92,158,.28)}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-d);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:var(--c-surface);border-color:var(--c-primary);color:var(--c-primary)}
.btn-outline:hover{background:var(--c-primary-l);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(0);background:#DCE9F7}
.btn-ghost{background:transparent;color:var(--c-text-2);border-color:var(--c-line)}
.btn-ghost:hover{color:var(--c-primary);border-color:var(--c-primary-l);background:var(--c-primary-l)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:8px}
.btn-block{width:100%}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:15px;
  font-weight:600;
  color:var(--c-primary);
}
.link-arrow i{font-size:12px;transition:transform var(--ease),color var(--ease)}
.link-arrow:hover{color:var(--c-primary-d)}
.link-arrow:hover i{transform:translateX(3px);color:var(--c-accent)}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  font-size:13px;
  font-weight:500;
  line-height:1;
  background:var(--c-primary-l);
  color:var(--c-primary);
  white-space:nowrap;
}
.badge-accent{background:var(--c-accent-l);color:var(--c-accent)}
.badge-soft{background:#EEF3F9;color:var(--c-text-2)}
.badge-success{background:#E6F5EE;color:var(--c-success)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--shadow-nav)}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:64px;
  transition:height var(--ease);
}
.site-header.is-scrolled .nav-wrap{height:56px}
.nav-left{display:flex;align-items:center;gap:32px;min-width:0}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;
  background:var(--c-primary);
  color:#fff;
  font-size:15px;
  box-shadow:0 4px 12px rgba(31,92,158,.24);
  transition:transform var(--ease),background var(--ease);
}
.brand:hover .brand-mark{transform:rotate(-6deg);background:var(--c-primary-d)}
.brand-text{
  font-size:20px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--c-text);
}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  height:64px;
  padding:0 12px;
  font-size:15px;
  color:var(--c-text-2);
  transition:color .18s ease,height var(--ease);
}
.site-header.is-scrolled .nav-link{height:56px}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:16px;
  height:2px;
  border-radius:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--c-primary);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-tools{display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  width:200px;
  height:36px;
  padding:0 12px;
  border-radius:var(--radius-sm);
  background:#F2F5F9;
  border:1px solid transparent;
  transition:border-color .18s ease,background .18s ease;
}
.nav-search:focus-within{border-color:var(--c-primary);background:var(--c-surface)}
.nav-search i{font-size:13px;color:var(--c-text-3)}
.nav-search input{
  width:100%;
  border:none;
  background:transparent;
  font-size:14px;
  outline:none;
}
.nav-search input::placeholder{color:var(--c-text-3)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid var(--c-line);
  border-radius:var(--radius-sm);
  background:var(--c-surface);
  color:var(--c-text);
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{color:var(--c-primary);border-color:var(--c-primary-l);background:var(--c-primary-l)}

/* 移动端抽屉 */
.mobile-panel{
  display:none;
  position:absolute;
  top:100%;left:0;right:0;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  box-shadow:var(--shadow-2);
  max-height:calc(100vh - 64px);
  overflow-y:auto;
}
.mobile-panel.is-open{display:block;animation:panelIn .22s ease}
@keyframes panelIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
.mobile-panel-inner{padding:20px 24px 28px}
.mobile-links{display:flex;flex-direction:column;gap:2px;margin-bottom:20px}
.mobile-links a{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 4px;
  font-size:15px;
  color:var(--c-text-2);
  border-bottom:1px solid var(--c-line);
}
.mobile-links a:last-child{border-bottom:none}
.mobile-links a:hover,.mobile-links a.active{color:var(--c-primary);font-weight:600}
.mobile-links a i{font-size:12px;color:var(--c-text-3)}
.mobile-search{
  display:flex;align-items:center;gap:10px;
  height:44px;padding:0 14px;margin-bottom:14px;
  background:var(--c-field);
  border:1px solid var(--c-line-2);
  border-radius:var(--radius-sm);
}
.mobile-search i{color:var(--c-text-3);font-size:14px}
.mobile-search input{flex:1;border:none;background:transparent;outline:none;font-size:14px}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;
  min-height:268px;
  display:flex;
  align-items:center;
  padding:56px 0;
  background:url("/assets/images/backpic/back-1.webp") center/cover no-repeat #E8F0FA;
  border-bottom:1px solid var(--c-line);
  overflow:hidden;
}
.cat-hero::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.88) 46%,rgba(255,255,255,.6) 100%);
}
.cat-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:14px;
  color:var(--c-text-3);
  margin-bottom:18px;
}
.breadcrumb a{color:var(--c-text-3)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-line-2)}
.breadcrumb .current{color:var(--c-primary);font-weight:600}
.cat-hero h1{
  font-size:42px;
  line-height:1.25;
  letter-spacing:.02em;
  color:var(--c-text);
  max-width:760px;
}
.cat-hero .lede{
  margin-top:16px;
  max-width:680px;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text-2);
}
.cat-hero .hero-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}

/* ---------- 速览说明条 ---------- */
.summary-band{
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  padding:28px 0;
}
.summary-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.summary-item{display:flex;align-items:flex-start;gap:12px}
.summary-item .ic{
  width:40px;height:40px;flex-shrink:0;
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-l);
  color:var(--c-primary);
  font-size:16px;
}
.summary-item:nth-child(2) .ic{background:var(--c-accent-l);color:var(--c-accent)}
.summary-item:nth-child(3) .ic{background:#E6F5EE;color:var(--c-success)}
.summary-item:nth-child(4) .ic{background:#FCF3E3;color:var(--c-warn)}
.summary-item strong{display:block;font-size:20px;font-weight:700;color:var(--c-text);line-height:1.3}
.summary-item span{font-size:13px;color:var(--c-text-2)}

/* ---------- 图文交替 ---------- */
.alt-stack{display:flex;flex-direction:column;gap:32px}
.alt-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1);
  padding:32px;
  transition:box-shadow var(--ease),transform var(--ease);
}
.alt-row:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.alt-media{
  position:relative;
  border-radius:var(--radius-md);
  overflow:hidden;
  background:#EDF2F8;
  aspect-ratio:16/10;
}
.alt-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.alt-row:hover .alt-media img{transform:scale(1.03)}
.alt-media .num-tag{
  position:absolute;
  left:16px;top:16px;
  display:inline-flex;align-items:center;justify-content:center;
  min-width:44px;height:28px;padding:0 12px;
  border-radius:999px;
  background:rgba(255,255,255,.94);
  color:var(--c-accent);
  font-size:13px;font-weight:700;letter-spacing:.06em;
  box-shadow:0 4px 12px rgba(20,52,88,.14);
}
.alt-body{min-width:0}
.alt-body .badge{margin-bottom:14px}
.alt-body h3{
  font-size:22px;
  line-height:1.5;
  color:var(--c-text);
  margin-bottom:12px;
}
.alt-body p{
  font-size:15px;
  line-height:1.85;
  color:var(--c-text-2);
  margin-bottom:16px;
}
.dot-list{display:flex;flex-direction:column;gap:8px;margin-bottom:20px}
.dot-list li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  line-height:1.75;
  color:var(--c-text-2);
}
.dot-list li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:6px;height:6px;
  border-radius:2px;
  background:var(--c-primary);
}
.alt-row:nth-child(even) .alt-media{order:2}
.alt-row:nth-child(even) .alt-body{order:1}

/* ---------- FAQ ---------- */
.faq-block{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-item:first-child{border-top:1px solid var(--c-line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 4px;
  background:transparent;
  border:none;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--c-text);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--c-primary)}
.faq-q[aria-expanded="true"]{color:var(--c-primary)}
.faq-q .chev{
  flex-shrink:0;
  width:28px;height:28px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--c-primary-l);
  color:var(--c-primary);
  font-size:11px;
  transition:transform .24s ease,background .18s ease;
}
.faq-q[aria-expanded="true"] .chev{transform:rotate(180deg);background:var(--c-accent-l);color:var(--c-accent)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s ease;
}
.faq-a-inner{
  padding:0 4px 24px;
  font-size:15px;
  line-height:1.8;
  color:var(--c-text-2);
}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--c-primary-l);
  border-radius:var(--radius-lg);
  padding:40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:26px;color:var(--c-primary-d);margin-bottom:8px}
.cta-band p{font-size:15px;color:var(--c-text-2);max-width:560px;line-height:1.8}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}

/* ---------- 相关推荐 ---------- */
.rel-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.rel-card{
  display:block;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:box-shadow var(--ease),transform var(--ease);
}
.rel-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.rel-card .thumb{
  aspect-ratio:16/10;
  background:#EDF2F8;
  overflow:hidden;
}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.rel-card:hover .thumb img{transform:scale(1.04)}
.rel-card .body{padding:20px 22px 24px}
.rel-card h3{
  font-size:18px;
  line-height:1.5;
  font-weight:600;
  color:var(--c-text);
  margin-bottom:10px;
}
.rel-card:hover h3{color:var(--c-primary)}
.rel-card .meta{
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;margin-top:16px;
  font-size:13px;color:var(--c-text-3);
}

/* ---------- 收藏 / 分享 ---------- */
.save-band{
  background:var(--c-primary-l);
  border-radius:var(--radius-lg);
  padding:36px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.save-band h2{font-size:24px;color:var(--c-primary-d);margin-bottom:6px}
.save-band p{font-size:15px;color:var(--c-text-2);line-height:1.75;max-width:520px}
.save-tools{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.socials{display:flex;align-items:center;gap:10px}
.social-btn{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--c-surface);
  color:var(--c-primary);
  border:1px solid var(--c-line);
  transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.social-btn:hover{background:var(--c-primary);color:#fff;transform:translateY(-2px);box-shadow:0 8px 18px rgba(31,92,158,.24)}
.social-btn:active{transform:translateY(0)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-surface);
  border-top:1px solid var(--c-line);
  padding-top:64px;
  margin-top:var(--sec-pad);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr 1.5fr;
  gap:40px 32px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:var(--c-text-2);
  max-width:280px;
  margin-bottom:18px;
}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-contact a{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--c-text-2);
}
.footer-contact a i{color:var(--c-primary);font-size:14px}
.footer-contact a:hover{color:var(--c-primary)}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:var(--c-text);
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col ul a{
  font-size:14px;
  color:var(--c-text-2);
  display:inline-block;
  transition:color .18s ease,transform .18s ease;
}
.footer-col ul a:hover{color:var(--c-primary);transform:translateX(3px)}
.subscribe-form{display:flex;flex-direction:column;gap:10px;margin-bottom:12px}
.subscribe-form input{
  height:44px;
  padding:0 14px;
  border-radius:var(--radius-sm);
  border:1px solid var(--c-line-2);
  background:var(--c-field);
  font-size:14px;
  outline:none;
  transition:border-color .18s ease,background .18s ease;
}
.subscribe-form input:focus{border-color:var(--c-primary);background:var(--c-surface)}
.subscribe-form input::placeholder{color:var(--c-text-3)}
.footer-col .tip{font-size:13px;line-height:1.7;color:var(--c-text-3)}
.subscribe-tip{font-size:13px;color:var(--c-success);min-height:20px;margin-top:6px}
.footer-bottom{
  border-top:1px solid var(--c-line);
  padding:22px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--c-text-3);
}
.fb-links{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.fb-links a{color:var(--c-text-3)}
.fb-links a:hover{color:var(--c-primary)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--sec-pad:64px}
  .nav-links,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .cat-hero{padding:44px 0;min-height:236px}
  .cat-hero h1{font-size:34px}
  .summary-grid{grid-template-columns:repeat(2,1fr)}
  .alt-row{grid-template-columns:1fr;gap:24px;padding:24px}
  .alt-row:nth-child(even) .alt-media{order:0}
  .alt-row:nth-child(even) .alt-body{order:0}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .cta-band{padding:32px}
  .save-band{padding:30px}
}
@media (max-width:640px){
  :root{--sec-pad:48px}
  .container{padding:0 16px}
  .nav-wrap{height:60px}
  .brand-text{font-size:18px}
  .cat-hero{padding:36px 0;min-height:0}
  .cat-hero h1{font-size:28px;line-height:1.3}
  .cat-hero .lede{font-size:15px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:24px}
  .section-head h2{font-size:24px}
  .summary-grid{grid-template-columns:1fr;gap:16px}
  .summary-band{padding:24px 0}
  .alt-body h3{font-size:20px}
  .rel-grid{grid-template-columns:1fr}
  .cta-band,.save-band{padding:24px;flex-direction:column;align-items:flex-start}
  .cta-actions,.save-tools{width:100%}
  .cta-actions .btn,.save-tools .btn{flex:1 1 auto}
  .faq-q{font-size:16px;padding:18px 2px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
  .site-footer{padding-top:48px;margin-top:48px}
}