/* roulang page: index */
/* ===================== 设计令牌 ===================== */
:root{
  --c-primary:#1D5B8F;
  --c-primary-dark:#164A75;
  --c-primary-soft:#EAF2F8;
  --c-primary-line:#CFE0EC;
  --c-ink:#12212E;
  --c-ink-2:#43586B;
  --c-muted:#7B8C9B;
  --c-bg:#F5F7FA;
  --c-surface:#FFFFFF;
  --c-line:#E1E8EF;
  --c-line-2:#EEF2F6;
  --c-accent:#F0A02E;
  --c-accent-soft:#FDF3E2;
  --c-accent-ink:#B4741A;
  --c-success:#1FA37A;
  --c-deep:#0E2B44;
  --c-deep-2:#143A5B;

  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --r-pill:999px;

  --sh-1:0 1px 2px rgba(18,33,46,.04), 0 6px 18px rgba(18,33,46,.05);
  --sh-2:0 2px 4px rgba(18,33,46,.06), 0 14px 32px rgba(18,33,46,.10);
  --sh-3:0 8px 24px rgba(18,33,46,.08);

  --sect:88px;
  --gutter:28px;
  --pad-x:32px;
}

/* ===================== 基础重置 ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:600;color:var(--c-ink);line-height:1.35;letter-spacing:0}
p{margin:0}
img{max-width:100%;height:auto;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color 160ms ease-out,background-color 160ms ease-out,border-color 160ms ease-out}
a:hover{color:var(--c-primary-dark)}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{border:0;background:none;padding:0;cursor:pointer}
:focus-visible{outline:3px solid rgba(29,91,143,.28);outline-offset:2px;border-radius:6px}
table{border-collapse:collapse}

/* ===================== 容器与栅格 ===================== */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--pad-x)}
main{display:block}
.section{padding-top:var(--sect)}
main > section:last-of-type{padding-bottom:var(--sect)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-title{font-size:30px;line-height:1.35}
.section-desc{margin-top:12px;font-size:17px;line-height:1.8;color:var(--c-ink-2);max-width:760px}
.section-kicker{display:inline-block;font-size:13px;color:var(--c-muted);margin-bottom:10px;letter-spacing:.4px}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;white-space:nowrap;cursor:pointer;
  transition:background-color 160ms ease-out,color 160ms ease-out,border-color 160ms ease-out,box-shadow 160ms ease-out,transform 160ms ease-out;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--c-ink);border-color:var(--c-line)}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost-light:hover{background:rgba(255,255,255,.10);color:#fff}
.btn-sm{height:34px;padding:0 16px;font-size:13px;border-radius:8px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.btn-block{width:100%}
.btn[disabled]{background:var(--c-line);color:var(--c-muted);border-color:transparent;cursor:not-allowed;box-shadow:none;transform:none}

/* ===================== 徽章 / 标签 / 文字链 ===================== */
.badge{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:500;line-height:1;white-space:nowrap}
.badge-cat{background:var(--c-primary-soft);color:var(--c-primary)}
.badge-member{background:var(--c-accent-soft);color:var(--c-accent-ink)}
.badge-rec{background:var(--c-accent-soft);color:var(--c-accent-ink);font-weight:600}
.badge-neutral{background:var(--c-line-2);color:var(--c-ink-2)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--c-primary)}
.text-link .arrow{display:inline-block;transition:transform 160ms ease-out}
.text-link:hover .arrow{transform:translateX(3px)}
.text-link:hover{text-decoration:underline}

/* ===================== 顶部导航 ===================== */
.site-header{position:sticky;top:0;z-index:60;background:var(--c-surface);border-bottom:1px solid var(--c-line);transition:box-shadow 200ms ease-out}
.site-header.is-stuck{box-shadow:var(--sh-3)}
.brand-bar{height:64px;transition:height 200ms ease-out}
.site-header.is-stuck .brand-bar{height:56px}
.brand-inner{display:flex;align-items:center;gap:18px;height:100%}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-ink);font-size:19px;font-weight:600;letter-spacing:.2px}
.brand:hover{color:var(--c-ink)}
.brand-mark{position:relative;width:28px;height:28px;border-radius:9px;background:var(--c-primary);flex:0 0 28px}
.brand-mark::after{content:"";position:absolute;left:8px;top:8px;width:12px;height:12px;border-radius:3px;background:#fff;opacity:.92}
.brand-text{white-space:nowrap}
.brand-actions{position:relative;margin-left:auto;display:flex;align-items:center;gap:14px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--c-line);border-radius:var(--r-btn);background:var(--c-surface);color:var(--c-ink-2);transition:border-color 160ms ease-out,color 160ms ease-out,background-color 160ms ease-out}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}
.link-quiet{font-size:14px;color:var(--c-ink-2);font-weight:500}
.link-quiet:hover{color:var(--c-primary)}
.search-panel{position:absolute;top:50px;right:0;width:340px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-sm);box-shadow:var(--sh-2);padding:14px;display:none;z-index:70}
.search-panel.is-open{display:block}
.search-panel form{display:flex;gap:8px}
.search-panel input{flex:1 1 auto;height:44px;border:1px solid var(--c-line);border-radius:var(--r-btn);padding:0 14px;font-size:14px;background:var(--c-surface)}
.search-panel input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,143,.18)}
.search-panel .search-hint{margin-top:10px;font-size:12px;color:var(--c-muted)}
.channel-bar{border-top:1px solid var(--c-line);background:var(--c-surface)}
.channel-inner{display:flex;align-items:center;gap:16px;height:44px}
.channel-list{display:flex;align-items:center;gap:2px;flex:0 0 auto}
.channel-list a{position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;font-size:15px;font-weight:500;color:var(--c-ink-2)}
.channel-list a:hover{color:var(--c-primary)}
.channel-list a.is-active{color:var(--c-primary)}
.channel-list a.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;border-radius:2px;background:var(--c-primary)}
.hot-list{display:flex;align-items:center;gap:8px;margin-left:auto;flex-wrap:nowrap;overflow:hidden}
.hot-list a{display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--r-pill);background:var(--c-primary-soft);color:var(--c-primary);font-size:12px;white-space:nowrap}
.hot-list a:hover{background:var(--c-primary-line);color:var(--c-primary-dark)}
.fresh-flag{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--c-muted);flex:0 0 auto}
.fresh-flag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--c-line);border-radius:var(--r-btn);color:var(--c-ink-2);background:var(--c-surface)}

/* ===================== 抽屉导航 ===================== */
.drawer-mask{position:fixed;inset:0;background:rgba(14,43,68,.32);opacity:0;pointer-events:none;transition:opacity 260ms ease-out;z-index:80}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:var(--c-surface);z-index:90;transform:translateX(100%);transition:transform 280ms ease-out;padding:20px;overflow-y:auto;box-shadow:var(--sh-3)}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:16px;font-weight:600}
.drawer form{display:flex;gap:8px;margin-bottom:20px}
.drawer input{flex:1 1 auto;height:46px;border:1px solid var(--c-line);border-radius:var(--r-btn);padding:0 14px;font-size:14px}
.drawer input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,143,.18)}
.drawer nav a{display:flex;align-items:center;height:52px;border-bottom:1px solid var(--c-line-2);font-size:16px;color:var(--c-ink);font-weight:500}
.drawer nav a.is-active{color:var(--c-primary)}
.drawer-hot{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 24px}
.drawer-hot a{display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-pill);background:var(--c-primary-soft);color:var(--c-primary);font-size:12px}
body.no-scroll{overflow:hidden}

/* ===================== Hero ===================== */
.hero{position:relative;padding:56px 0 0;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:url("/assets/images/backpic/back-1.png") center/cover no-repeat;opacity:.10;pointer-events:none}
.hero > .container{position:relative;z-index:1}
.hero-grid{align-items:center;row-gap:40px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;border-radius:var(--r-pill);background:var(--c-primary-soft);color:var(--c-primary);font-size:13px;font-weight:500;margin-bottom:20px}
.hero-title{font-size:42px;line-height:1.25;letter-spacing:-.5px}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--c-ink-2);max-width:600px}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px}
.hero-trust{margin-top:28px;display:flex;flex-wrap:wrap;gap:22px}
.hero-trust li{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--c-ink-2)}
.hero-trust svg{flex:0 0 18px;color:var(--c-success)}
.hero-visual{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:12px;box-shadow:var(--sh-1)}
.hero-visual img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-sm);background:var(--c-primary-soft);border:1px solid var(--c-line)}
.hero-visual-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 4px 2px;font-size:13px;color:var(--c-muted)}
.metric-bar{margin-top:56px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden}
.metric{padding:22px 24px;border-right:1px solid var(--c-line-2)}
.metric:last-child{border-right:0}
.metric-num{display:block;font-size:28px;font-weight:600;color:var(--c-primary);line-height:1.2;font-variant-numeric:tabular-nums}
.metric-label{display:block;margin-top:6px;font-size:13px;color:var(--c-muted)}

/* ===================== 最新信息 ===================== */
.news-lead{display:block;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow 200ms ease-out,transform 200ms ease-out}
.news-lead:hover{transform:translateY(-2px);box-shadow:var(--sh-2);color:inherit}
.news-lead-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-soft)}
.news-lead-media img{width:100%;height:100%;object-fit:cover}
.news-lead-media .badge{position:absolute;left:14px;top:14px}
.news-lead-body{padding:22px 24px 24px}
.news-lead-title{font-size:22px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-lead:hover .news-lead-title{color:var(--c-primary)}
.news-lead-sum{margin-top:12px;font-size:16px;line-height:1.8;color:var(--c-ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-lead-meta{margin-top:18px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums}
.news-list{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden}
.news-row{display:flex;gap:16px;padding:18px 20px;border-bottom:1px solid var(--c-line-2);transition:background-color 160ms ease-out}
.news-row:last-child{border-bottom:0}
.news-row:hover{background:var(--c-primary-soft);color:inherit}
.news-row:hover .news-row-title{color:var(--c-primary)}
.news-time{flex:0 0 76px;font-size:13px;color:var(--c-muted);font-variant-numeric:tabular-nums;line-height:1.7}
.news-row-body{min-width:0;flex:1 1 auto}
.news-row-title{font-size:16px;font-weight:500;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row-foot{margin-top:8px}
.empty-state{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:56px 24px;text-align:center;box-shadow:var(--sh-1)}
.empty-state svg{color:var(--c-muted);margin-bottom:16px}
.empty-state p{font-size:15px;color:var(--c-ink-2);margin-bottom:20px}

/* ===================== 会员权益对比 ===================== */
.plan-wrap{margin-top:8px}
.plan-scroll{overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch}
.plan-grid{min-width:860px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1)}
.plan-row{display:grid;grid-template-columns:1.15fr 1fr 1fr 1fr;align-items:stretch}
.plan-row + .plan-row{border-top:1px solid var(--c-line-2)}
.plan-row.is-alt{background:#F9FBFD}
.plan-head{border-bottom:1px solid var(--c-line);background:var(--c-surface)}
.pg-cell{padding:16px 20px;display:flex;align-items:center;font-size:15px;line-height:1.7;min-height:56px}
.pg-name{color:var(--c-ink-2);font-size:14px;align-items:center}
.pg-corner{flex-direction:column;align-items:flex-start;justify-content:center;background:var(--c-primary-soft)}
.pg-corner-title{font-size:16px;font-weight:600;color:var(--c-primary)}
.pg-corner-note{font-size:13px;color:var(--c-ink-2);margin-top:4px}
.pg-tier{flex-direction:column;align-items:flex-start;justify-content:flex-start;padding:22px 20px 24px;position:relative;gap:0}
.pg-tier.is-feature{background:var(--c-primary-soft);box-shadow:inset 0 3px 0 0 var(--c-primary)}
.tier-name{font-size:18px;font-weight:600}
.tier-price{margin-top:12px;display:flex;align-items:baseline;gap:6px}
.tier-price .num{font-size:34px;font-weight:600;color:var(--c-primary);line-height:1;font-variant-numeric:tabular-nums}
.tier-price .unit{font-size:14px;color:var(--c-muted)}
.tier-cycle{margin-top:8px;font-size:13px;color:var(--c-muted)}
.pg-tier .btn{margin-top:18px}
.tier-tag{position:absolute;right:20px;top:22px}
.pg-cell.val{justify-content:center;font-variant-numeric:tabular-nums}
.pg-cell.val.is-feature{background:var(--c-primary-soft)}
.check{color:var(--c-success);display:inline-flex}
.dash{color:var(--c-muted)}
.scroll-hint{display:none;margin-top:10px;font-size:13px;color:var(--c-muted)}

/* ===================== 等级时间轴 ===================== */
.timeline{position:relative;padding-left:60px;margin-top:8px}
.timeline::before{content:"";position:absolute;left:18px;top:20px;bottom:20px;width:2px;background:var(--c-primary-line)}
.tl-item{position:relative;margin-bottom:24px}
.tl-item:last-child{margin-bottom:0}
.tl-dot{position:absolute;left:-58px;top:10px;width:36px;height:36px;border-radius:50%;border:2px solid var(--c-primary);background:var(--c-surface);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;font-variant-numeric:tabular-nums;z-index:1}
.tl-item.is-current .tl-dot{background:var(--c-primary);color:#fff}
.tl-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px 24px;box-shadow:var(--sh-1);transition:box-shadow 200ms ease-out,transform 200ms ease-out}
.tl-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.tl-card-head{display:flex;align-items:center;justify-content:space-between;gap:16px}
.tl-card h3{font-size:20px}
.tl-card p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}

/* ===================== 专属内容预览 ===================== */
.content-card{position:relative;display:block;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow 200ms ease-out,transform 200ms ease-out}
.content-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);color:inherit}
.cc-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-primary-soft)}
.cc-media img{width:100%;height:100%;object-fit:cover}
.content-card.is-locked .cc-media img{filter:blur(2px)}
.content-card.is-locked .cc-media::after{content:"";position:absolute;inset:0;background:rgba(14,43,68,.18)}
.cc-badge{position:absolute;right:12px;top:12px;z-index:2}
.cc-body{padding:18px 20px 20px}
.cc-title{font-size:17px;font-weight:600;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.content-card:hover .cc-title{color:var(--c-primary)}
.cc-sum{margin-top:8px;font-size:14px;line-height:1.75;color:var(--c-ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cc-lock-note{margin-top:14px;padding-top:12px;border-top:1px solid var(--c-line-2);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-muted)}
.cc-lock-note .text-link{font-size:13px}
.content-foot{margin-top:36px;text-align:center}
.content-foot p{font-size:15px;color:var(--c-ink-2);margin-bottom:18px}

/* ===================== FAQ ===================== */
.faq-aside .section-desc{margin-top:14px}
.faq-contact{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.faq-contact .who{font-size:14px;color:var(--c-muted)}
.faq-list{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1)}
.faq-item + .faq-item{border-top:1px solid var(--c-line-2)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;min-height:56px;padding:14px 22px;text-align:left;font-size:16px;font-weight:500;color:var(--c-ink);transition:background-color 160ms ease-out,color 160ms ease-out}
.faq-q:hover{background:var(--c-primary-soft);color:var(--c-primary)}
.faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;transform:translate(-50%,-50%);transition:transform 200ms ease-out,opacity 200ms ease-out}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms ease-out;background:var(--c-primary-soft)}
.faq-a-inner{padding:20px 22px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}

/* ===================== CTA 反相带 ===================== */
.cta-band{position:relative;background:var(--c-deep);padding:80px 0;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;opacity:.08;pointer-events:none}
.cta-band > .container{position:relative;z-index:1}
.cta-copy h2{color:#fff;font-size:30px;line-height:1.35}
.cta-copy p{margin-top:16px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.74)}
.cta-tags{margin-top:24px;display:flex;flex-wrap:wrap;gap:10px}
.cta-tags span{display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.88);font-size:13px}
.cta-form-card{background:var(--c-surface);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-2)}
.cta-form-card h3{font-size:20px;margin-bottom:6px}
.cta-form-card .form-note{font-size:13px;color:var(--c-muted);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:500;margin-bottom:8px;color:var(--c-ink)}
.field input,.field select,.field textarea{width:100%;height:48px;border:1px solid var(--c-line);border-radius:var(--r-btn);padding:0 16px;font-size:15px;background:var(--c-surface);color:var(--c-ink);transition:border-color 160ms ease-out,box-shadow 160ms ease-out}
.field textarea{height:auto;min-height:120px;padding:14px 16px;line-height:1.75;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--c-muted)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,143,.18)}
.check{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--c-ink-2);margin:4px 0 20px;line-height:1.6}
.check input{appearance:none;-webkit-appearance:none;width:18px;height:18px;flex:0 0 18px;margin-top:2px;border:1px solid var(--c-line);border-radius:4px;background:var(--c-surface);position:relative;cursor:pointer;transition:background-color 160ms ease-out,border-color 160ms ease-out}
.check input:checked{background:var(--c-primary);border-color:var(--c-primary)}
.check input:checked::after{content:"";position:absolute;left:5px;top:1px;width:5px;height:10px;border:2px solid #fff;border-top:0;border-left:0;transform:rotate(45deg)}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--c-deep);color:rgba(255,255,255,.72);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand{color:#fff}
.footer-brand .brand:hover{color:#fff}
.footer-brand .brand-mark{background:#fff}
.footer-brand .brand-mark::after{background:var(--c-deep)}
.footer-note{margin-top:18px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col ul a:hover{color:#fff;text-decoration:underline}
.footer-contact li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:rgba(255,255,255,.72);margin-bottom:10px}
.footer-contact li span:first-child{color:rgba(255,255,255,.5)}
.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.55)}

/* ===================== 回到顶部 ===================== */
.back-top{position:fixed;right:24px;bottom:24px;width:56px;height:56px;border-radius:50%;background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--sh-3);display:flex;align-items:center;justify-content:center;color:var(--c-primary);opacity:0;pointer-events:none;transition:opacity 220ms ease-out,transform 220ms ease-out;z-index:70}
.back-top.is-show{opacity:1;pointer-events:auto}
.back-top:hover{transform:translateY(-2px);color:var(--c-primary-dark)}

/* ===================== 响应式 ===================== */
@media (max-width:1439px){
  .container{max-width:1200px}
}
@media (max-width:1023px){
  :root{--sect:72px;--pad-x:24px}
  .hero-title{font-size:34px}
  .section-title{font-size:26px}
  .cta-copy h2{font-size:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .hot-list{display:none}
  .metric-bar{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(2){border-right:0}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--c-line-2)}
  .plan-scroll{margin-top:0}
  .scroll-hint{display:block}
  .timeline{padding-left:52px}
  .timeline::before{left:16px}
  .tl-dot{left:-52px}
}
@media (max-width:639px){
  :root{--sect:56px;--pad-x:20px}
  body{font-size:15px}
  .brand-bar{height:58px}
  .site-header.is-stuck .brand-bar{height:54px}
  .brand{font-size:17px}
  .brand-mark{width:26px;height:26px;flex:0 0 26px}
  .brand-mark::after{left:7px;top:7px;width:12px;height:12px}
  .channel-bar{display:none}
  .nav-toggle{display:inline-flex}
  .brand-actions{gap:10px}
  .brand-actions .link-quiet,.brand-actions .btn-cta{display:none}
  .search-panel{right:-6px;width:min(320px,86vw)}
  .hero{padding-top:36px}
  .hero-title{font-size:28px;line-height:1.3}
  .hero-sub{font-size:16px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-trust{gap:14px}
  .metric-bar{margin-top:36px}
  .metric{padding:18px 16px}
  .metric-num{font-size:22px}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:24px}
  .section-title{font-size:22px}
  .section-desc{font-size:15px}
  .news-lead-body{padding:18px 18px 20px}
  .news-lead-title{font-size:19px}
  .news-row{padding:16px}
  .news-time{flex:0 0 64px;font-size:12px}
  .plan-grid{min-width:720px}
  .tl-card{padding:18px}
  .tl-card h3{font-size:18px}
  .faq-q{font-size:15px;padding:14px 18px}
  .faq-a-inner{padding:16px 18px}
  .cta-band{padding:56px 0}
  .cta-form-card{padding:22px 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-note{max-width:none}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .back-top{right:16px;bottom:16px;width:48px;height:48px}
}

/* roulang page: category1 */
:root{
  --c-primary:#1D5B8F;
  --c-primary-dark:#164A75;
  --c-primary-soft:#EAF2F8;
  --c-primary-line:#CFE0EC;
  --c-ink:#12212E;
  --c-ink-2:#43586B;
  --c-muted:#7B8C9B;
  --c-bg:#F5F7FA;
  --c-surface:#FFFFFF;
  --c-line:#E1E8EF;
  --c-line-2:#EEF2F6;
  --c-accent:#F0A02E;
  --c-accent-soft:#FDF3E2;
  --c-success:#1FA37A;
  --c-deep:#0E2B44;
  --c-deep-2:#143A5B;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(18,33,46,.04),0 6px 18px rgba(18,33,46,.05);
  --sh-2:0 2px 4px rgba(18,33,46,.06),0 14px 32px rgba(18,33,46,.10);
  --sh-3:0 8px 24px rgba(18,33,46,.08);
  --col-gap:28px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--c-primary-dark)}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;color:var(--c-ink);font-family:inherit}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid rgba(29,91,143,.28);outline-offset:2px;border-radius:4px}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
.nums{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:70;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-condensed{box-shadow:var(--sh-3)}
.brand-bar{height:64px;display:flex;align-items:center;transition:height .2s ease-out}
.site-header.is-condensed .brand-bar{height:56px}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--c-ink);font-size:18px;font-weight:600;letter-spacing:-.2px}
.brand:hover{color:var(--c-primary)}
.brand-mark{
  width:24px;height:24px;border-radius:7px;
  background:var(--c-primary);
  position:relative;flex:0 0 auto;
}
.brand-mark::after{
  content:"";position:absolute;right:5px;bottom:5px;width:9px;height:9px;
  background:var(--c-accent);border-radius:2px;
}
.brand-text{white-space:nowrap}
.brand-actions{display:flex;align-items:center;gap:12px;position:relative}
.icon-btn{
  width:38px;height:38px;border-radius:var(--r-sm);
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-ink-2);
  display:inline-flex;align-items:center;justify-content:center;
  transition:all .18s ease-out;
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
.link-quiet{font-size:14px;color:var(--c-ink-2);padding:8px 4px}
.link-quiet:hover{color:var(--c-primary)}
.nav-toggle{
  display:none;width:38px;height:38px;border-radius:var(--r-sm);
  border:1px solid var(--c-line);background:var(--c-surface);color:var(--c-ink-2);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
.search-panel{
  position:absolute;top:52px;right:0;width:380px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-3);padding:18px;display:none;z-index:80;
}
.search-panel.is-open{display:block}
.search-panel form{display:flex;gap:10px}
.search-panel input[type="search"]{
  flex:1;height:44px;border:1px solid var(--c-line);border-radius:var(--r-sm);
  padding:0 14px;background:var(--c-surface);
}
.search-panel input[type="search"]:focus{border-color:var(--c-primary);outline:none;box-shadow:0 0 0 3px rgba(29,91,143,.18)}
.search-hint{margin-top:10px;font-size:13px;color:var(--c-muted);line-height:1.6}
.channel-bar{border-top:1px solid var(--c-line-2)}
.channel-inner{display:flex;align-items:center;gap:18px;min-height:44px}
.channel-list{display:flex;align-items:center;gap:4px}
.channel-list a{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--c-ink-2);
}
.channel-list a:hover{color:var(--c-primary)}
.channel-list a.is-active{color:var(--c-primary);font-weight:600}
.channel-list a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.hot-list{display:flex;align-items:center;gap:8px;margin-left:auto}
.hot-list a{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:13px;
}
.hot-list a:hover{background:var(--c-primary-line)}
.fresh-flag{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c-muted);
}
.fresh-flag::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--c-accent);
}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,43,68,.32);
  opacity:0;visibility:hidden;transition:opacity .26s ease-out,visibility .26s ease-out;z-index:90;
}
.mobile-drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:380px;
  background:var(--c-surface);z-index:95;
  transform:translateX(102%);transition:transform .26s ease-out;
  padding:22px 20px 32px;overflow-y:auto;box-shadow:var(--sh-3);
}
body.nav-open .mobile-drawer{transform:translateX(0)}
body.nav-open .drawer-mask{opacity:1;visibility:visible}
body.nav-open{overflow:hidden}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{
  width:36px;height:36px;border-radius:var(--r-sm);border:1px solid var(--c-line);
  background:var(--c-surface);color:var(--c-ink-2);display:inline-flex;align-items:center;justify-content:center;
}
.drawer-nav li a{
  display:flex;align-items:center;height:52px;border-bottom:1px solid var(--c-line-2);
  color:var(--c-ink);font-size:16px;font-weight:500;
}
.drawer-nav li a.is-active{color:var(--c-primary);font-weight:600}
.drawer-hot{margin-top:22px}
.drawer-hot h5{font-size:13px;color:var(--c-muted);font-weight:500;margin-bottom:10px}
.drawer-hot ul{display:flex;flex-wrap:wrap;gap:8px}
.drawer-hot a{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:13px;
}
.drawer-cta{margin-top:26px}
.drawer-cta .btn{width:100%}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:all .18s ease-out;white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-outline{background:var(--c-surface);border-color:var(--c-line);color:var(--c-ink)}
.btn-outline:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-inverse{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}
.btn-inverse:hover{background:rgba(255,255,255,.10);color:#fff}
.btn-sm{height:34px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.btn:disabled,.btn.is-disabled{background:var(--c-line);color:var(--c-muted);border-color:transparent;cursor:not-allowed;transform:none;box-shadow:none}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--c-primary);
}
.text-link svg{transition:transform .18s ease-out}
.text-link:hover{text-decoration:underline}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- 页面结构 ---------- */
main{display:block}
.section{margin-top:88px}
.band{margin-top:88px;padding:64px 0;background:var(--c-primary-soft)}
.section-head{margin-bottom:28px;max-width:760px}
.section-head h2{font-size:30px;letter-spacing:-.3px}
.section-head .section-desc{margin-top:12px;font-size:17px;line-height:1.8;color:var(--c-ink-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;
  color:var(--c-primary);background:var(--c-primary-soft);
  height:26px;padding:0 12px;border-radius:999px;margin-bottom:14px;
}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background-color:var(--c-primary-soft);
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-line);
  padding:32px 0 48px;
}
.page-hero::before{content:"";position:absolute;inset:0;background:rgba(245,247,250,.92)}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted)}
.breadcrumb a{color:var(--c-ink-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-line)}
.breadcrumb .current{color:var(--c-muted)}
.hero-title{margin-top:16px;font-size:42px;line-height:1.25;letter-spacing:-.5px;max-width:860px}
.hero-sub{margin-top:14px;font-size:18px;line-height:1.8;color:var(--c-ink-2);max-width:720px}
.hero-stats{
  margin-top:28px;display:flex;flex-wrap:wrap;gap:0;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden;max-width:760px;
}
.hero-stat{flex:1 1 0;min-width:160px;padding:18px 22px;border-right:1px solid var(--c-line-2)}
.hero-stat:last-child{border-right:none}
.hero-stat .num{font-size:26px;font-weight:600;color:var(--c-primary);line-height:1.3}
.hero-stat .label{font-size:13px;color:var(--c-muted);margin-top:2px}

/* ---------- 栏目卡片 ---------- */
.topic-grid{margin-top:0}
.topic-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.topic-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.topic-card .tc-icon{
  width:44px;height:44px;border-radius:var(--r-md);background:var(--c-primary-soft);
  color:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.topic-card h3{font-size:20px}
.topic-card p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;background:var(--c-primary-soft);color:var(--c-primary);
}
.tag-accent{background:var(--c-accent-soft);color:var(--c-accent)}
.tag-line{background:var(--c-surface);border:1px solid var(--c-line);color:var(--c-ink-2)}
.topic-card .tc-foot{margin-top:auto;padding-top:20px}

/* ---------- 图文横排 ---------- */
.split-band{background:var(--c-surface);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.split-figure{
  border-radius:var(--r-md);overflow:hidden;border:1px solid var(--c-line);
  background:var(--c-primary-soft);
}
.split-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.split-body h2{font-size:30px;letter-spacing:-.3px}
.split-body > p{margin-top:14px;font-size:17px;line-height:1.8;color:var(--c-ink-2)}
.check-list{margin-top:22px;display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;gap:12px;align-items:flex-start}
.check-list .ck{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:rgba(31,163,122,.12);
  color:var(--c-success);display:inline-flex;align-items:center;justify-content:center;margin-top:4px;
}
.check-list .ck-text strong{display:block;font-size:15px;font-weight:600;color:var(--c-ink)}
.check-list .ck-text span{font-size:14px;color:var(--c-ink-2);line-height:1.7}

/* ---------- 流程 ---------- */
.flow-grid{display:flex;flex-wrap:wrap;gap:var(--col-gap);position:relative}
.flow-step{
  flex:1 1 0;min-width:200px;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1);position:relative;
  transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.flow-step:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.flow-step .idx{
  width:36px;height:36px;border-radius:50%;border:2px solid var(--c-primary);
  color:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:600;background:var(--c-surface);
}
.flow-step h3{margin-top:16px;font-size:18px}
.flow-step p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--c-ink-2)}
.flow-step::after{
  content:"";position:absolute;top:41px;right:-16px;width:14px;border-top:1px dashed var(--c-primary-line);
}
.flow-step:last-child::after{display:none}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;
}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:58px;padding:14px 22px;background:transparent;border:none;text-align:left;
  font-size:16px;font-weight:500;color:var(--c-ink);transition:color .18s ease-out;
}
.faq-q:hover{color:var(--c-primary)}
.faq-q .plus{
  flex:0 0 auto;width:20px;height:20px;position:relative;color:var(--c-primary);
  transition:transform .22s ease-out;
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq-q .plus::before{left:0;right:0;top:9px;height:2px}
.faq-q .plus::after{top:0;bottom:0;left:9px;width:2px;transition:opacity .22s ease-out}
.faq-item.is-open .faq-q{color:var(--c-primary)}
.faq-item.is-open .plus{transform:rotate(180deg)}
.faq-item.is-open .plus::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease-out;background:var(--c-primary-soft)}
.faq-a .faq-a-inner{padding:18px 22px;font-size:15px;line-height:1.8;color:var(--c-ink-2);border-top:1px solid var(--c-line-2)}
.faq-item.is-open .faq-a{max-height:340px}

/* ---------- CTA 面板 ---------- */
.cta-panel{
  background:var(--c-primary-soft);border:1px solid var(--c-primary-line);
  border-radius:var(--r-lg);padding:40px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-panel h2{font-size:26px;letter-spacing:-.3px}
.cta-panel p{margin-top:10px;font-size:15px;line-height:1.8;color:var(--c-ink-2);max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-deep);color:rgba(255,255,255,.82);padding:64px 0 28px;margin-top:88px}
.footer-grid{display:flex;flex-wrap:wrap;gap:var(--col-gap)}
.footer-col{flex:1 1 200px;min-width:180px}
.footer-brand{flex:1.4 1 260px}
.site-footer .brand{color:#fff;font-size:18px}
.site-footer .brand:hover{color:#fff}
.site-footer .footer-note{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:360px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.2px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col ul a:hover{color:#fff;text-decoration:underline}
.footer-contact li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:rgba(255,255,255,.72)}
.footer-contact li span:first-child{color:rgba(255,255,255,.5)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);line-height:1.7;
}
.footer-bottom p{max-width:760px}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:56px;height:56px;border-radius:50%;
  background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--sh-3);
  color:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s ease-out;z-index:60;
}
.to-top.is-show{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--c-primary)}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1439px){
  .container{max-width:1140px}
}
@media screen and (max-width:1023px){
  .container{padding:0 24px}
  .section,.band{margin-top:72px}
  .band{padding:52px 0}
  .hero-title{font-size:34px}
  .split-body h2,.section-head h2{font-size:26px}
  .hot-list{display:none}
  .channel-inner{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .channel-list{flex:0 0 auto}
  .flow-step{flex:1 1 42%}
  .flow-step::after{display:none}
}
@media screen and (max-width:639px){
  body{font-size:16px;line-height:1.8}
  .container{padding:0 20px}
  .section,.band{margin-top:56px}
  .band{padding:40px 0}
  .brand-bar{height:60px}
  .link-quiet{display:none}
  .nav-toggle{display:inline-flex}
  .channel-bar{display:none}
  .search-panel{width:calc(100vw - 40px);right:-8px;top:50px}
  .hero-title{font-size:28px;letter-spacing:-.3px}
  .hero-sub{font-size:16px}
  .page-hero{padding:24px 0 36px}
  .hero-stats{flex-direction:column}
  .hero-stat{border-right:none;border-bottom:1px solid var(--c-line-2)}
  .hero-stat:last-child{border-bottom:none}
  .section-head h2,.split-body h2{font-size:22px}
  .section-head .section-desc,.split-body > p{font-size:16px}
  .topic-card{padding:22px}
  .split-body h2{font-size:22px}
  .flow-step{flex:1 1 100%;min-width:0}
  .cta-panel{padding:26px 22px;flex-direction:column;align-items:flex-start;gap:20px}
  .cta-panel h2{font-size:21px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{gap:32px}
  .footer-brand{flex:1 1 100%}
  .footer-col{flex:1 1 100%}
  .site-footer{padding:48px 0 24px;margin-top:56px}
  .to-top{right:16px;bottom:16px;width:48px;height:48px}
}

/* roulang page: article */
/* ============ 设计令牌 ============ */
:root{
  --c-primary:#1D5B8F;
  --c-primary-dark:#164A75;
  --c-primary-soft:#EAF2F8;
  --c-primary-line:#CFE0EC;
  --c-ink:#12212E;
  --c-ink-2:#43586B;
  --c-muted:#7B8C9B;
  --c-bg:#F5F7FA;
  --c-surface:#FFFFFF;
  --c-line:#E1E8EF;
  --c-line-2:#EEF2F6;
  --c-accent:#F0A02E;
  --c-accent-soft:#FDF3E2;
  --c-success:#1FA37A;
  --c-deep:#0E2B44;
  --c-deep-2:#143A5B;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sh-1:0 1px 2px rgba(18,33,46,.04),0 6px 18px rgba(18,33,46,.05);
  --sh-2:0 2px 4px rgba(18,33,46,.06),0 14px 32px rgba(18,33,46,.10);
  --sh-3:0 8px 24px rgba(18,33,46,.08);
  --gap-block:88px;
}
/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-weight:400;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-md)}
svg{display:block}
a{color:inherit;text-decoration:none;background:transparent;transition:color .18s ease-out,background-color .18s ease-out,border-color .18s ease-out}
a:hover{color:var(--c-primary)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:600;color:var(--c-ink);letter-spacing:-.01em}
p{margin:0}
time,.num,.tnum{font-variant-numeric:tabular-nums}
::selection{background:var(--c-primary-soft);color:var(--c-primary-dark)}
:focus-visible{outline:3px solid rgba(29,91,143,.28);outline-offset:2px;border-radius:6px}
/* ============ 容器 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media(max-width:1023px){.container{padding:0 24px}}
@media(max-width:639px){.container{padding:0 20px}}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{background:#fff;border-color:var(--c-line);color:var(--c-ink)}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary);background:#fff}
.btn-inverse{background:transparent;border-color:rgba(255,255,255,.42);color:#fff}
.btn-inverse:hover{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.7)}
.btn-sm{height:32px;padding:0 14px;font-size:13px;border-radius:8px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.btn-block{width:100%}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);
}
.btn-text svg{transition:transform .18s ease-out}
.btn-text:hover svg{transform:translateX(3px)}
.btn-text:hover{text-decoration:underline;text-underline-offset:3px}
/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:4px;height:24px;padding:0 10px;
  border-radius:999px;font-size:12px;font-weight:500;line-height:1;white-space:nowrap;
}
.badge-cat{background:var(--c-primary-soft);color:var(--c-primary)}
.badge-vip{background:var(--c-accent-soft);color:var(--c-accent)}
.badge-ok{background:#E8F6F1;color:var(--c-success)}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:#fff;border:1px solid var(--c-line);font-size:13px;color:var(--c-ink-2);
}
.tag:hover{border-color:var(--c-primary);color:var(--c-primary)}
/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease-out;
}
.site-header.is-stuck{box-shadow:var(--sh-3)}
.brand-bar{display:flex;align-items:center;height:64px;transition:height .22s ease-out}
.site-header.is-stuck .brand-bar{height:56px}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{position:relative;width:28px;height:28px;border-radius:9px;background:var(--c-primary);flex:0 0 28px}
.brand-mark::after{
  content:"";position:absolute;left:10px;top:8px;width:0;height:0;
  border-left:9px solid #fff;border-top:6px solid transparent;border-bottom:6px solid transparent;
}
.brand-text{font-size:18px;font-weight:700;color:var(--c-ink);letter-spacing:-.2px}
.brand:hover .brand-text{color:var(--c-primary)}
.brand-actions{position:relative;display:flex;align-items:center;gap:14px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;color:var(--c-ink-2);
  transition:background-color .18s ease-out,color .18s ease-out;
}
.icon-btn:hover{background:var(--c-primary-soft);color:var(--c-primary)}
.link-quiet{font-size:14px;color:var(--c-ink-2)}
.link-quiet:hover{color:var(--c-primary)}
.nav-toggle{display:none;width:36px;height:36px;align-items:center;justify-content:center;border-radius:10px;color:var(--c-ink-2)}
.nav-toggle:hover{background:var(--c-primary-soft);color:var(--c-primary)}
.search-panel{
  position:absolute;top:calc(100% + 12px);right:0;width:340px;padding:16px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  box-shadow:var(--sh-3);opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s ease-out,transform .18s ease-out,visibility .18s;
  z-index:70;
}
.search-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.search-panel form{display:flex;gap:8px}
.search-panel input[type=search]{
  flex:1;height:40px;padding:0 12px;border:1px solid var(--c-line);border-radius:8px;
  font-size:14px;background:#fff;
}
.search-panel input[type=search]:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,143,.18)}
.search-hint{margin-top:10px;font-size:13px;color:var(--c-muted);line-height:1.6}
.channel-bar{background:var(--c-surface);border-top:1px solid var(--c-line-2)}
.channel-inner{display:flex;align-items:center;gap:18px;min-height:44px}
.channel-list{display:flex;align-items:center;gap:2px}
.channel-list a{
  position:relative;display:block;height:44px;line-height:44px;padding:0 14px;
  font-size:15px;color:var(--c-ink-2);font-weight:500;
}
.channel-list a:hover{color:var(--c-primary)}
.channel-list a.is-active{color:var(--c-primary);font-weight:600}
.channel-list a.is-active::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--c-primary);
}
.hot-list{display:flex;align-items:center;gap:8px;margin-left:8px}
.hot-list a{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  background:var(--c-primary-soft);color:var(--c-primary);font-size:12px;
}
.hot-list a:hover{background:var(--c-primary);color:#fff}
.fresh-flag{
  display:inline-flex;align-items:center;gap:6px;margin-left:auto;
  font-size:12px;color:var(--c-muted);
}
.fresh-flag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
/* ============ 面包屑 ============ */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--c-muted)}
.breadcrumb a{color:var(--c-ink-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-line);font-size:13px}
.breadcrumb .current{max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--c-muted)}
/* ============ 文章头部 ============ */
.article-head{
  padding:28px 0 36px;
  background:linear-gradient(180deg,#FFFFFF 0%,#F7FAFC 62%,var(--c-bg) 100%);
  border-bottom:1px solid var(--c-line);
}
.article-head .breadcrumb{margin-bottom:22px}
.article-title{
  font-size:36px;line-height:1.36;letter-spacing:-.4px;font-weight:600;
  max-width:900px;margin:14px 0 18px;overflow-wrap:break-word;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--c-muted)}
.meta-row .divider{width:1px;height:12px;background:var(--c-line)}
.hero-figure{margin-top:26px}
.hero-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border:1px solid var(--c-line);background:var(--c-primary-soft)}
.hero-figure figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--c-muted)}
/* ============ 文章布局 ============ */
.article-body{padding:44px 0 var(--gap-block)}
.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 300px;
  gap:48px;justify-content:center;align-items:start;
}
.article-main{min-width:0}
.entry{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:36px 40px;box-shadow:var(--sh-1);
}
/* 正文排版 */
.entry-body{font-size:16px;line-height:1.9;color:var(--c-ink);overflow-wrap:break-word}
.entry-body p{margin:0 0 20px}
.entry-body h2{
  position:relative;font-size:24px;line-height:1.45;margin:40px 0 16px;padding-left:14px;
}
.entry-body h2::before{
  content:"";position:absolute;left:0;top:7px;width:4px;height:20px;border-radius:2px;background:var(--c-primary);
}
.entry-body h3{font-size:20px;line-height:1.5;margin:32px 0 12px}
.entry-body h2:first-child,.entry-body h3:first-child{margin-top:0}
.entry-body blockquote{
  margin:24px 0;padding:20px;border-left:3px solid var(--c-primary);
  background:var(--c-primary-soft);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--c-ink-2);
}
.entry-body blockquote p:last-child{margin-bottom:0}
.entry-body ul{margin:0 0 20px}
.entry-body ul>li{position:relative;padding-left:20px;margin-bottom:10px}
.entry-body ul>li::before{
  content:"";position:absolute;left:4px;top:12px;width:6px;height:6px;border-radius:50%;background:var(--c-primary);
}
.entry-body ol{margin:0 0 20px;padding-left:22px;list-style:decimal}
.entry-body ol>li{margin-bottom:10px;padding-left:4px}
.entry-body ol>li::marker{color:var(--c-primary);font-variant-numeric:tabular-nums;font-weight:600}
.entry-body img{margin:24px auto;width:100%;border:1px solid var(--c-line)}
.entry-body figure{margin:24px 0}
.entry-body figcaption{margin-top:8px;text-align:center;font-size:13px;color:var(--c-muted)}
.entry-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.entry-body strong{font-weight:600}
.entry-body table{
  width:100%;margin:24px 0;border-collapse:collapse;font-size:15px;
  border:1px solid var(--c-line);border-radius:var(--r-md);
}
.entry-body th,.entry-body td{padding:12px 16px;border:1px solid var(--c-line);text-align:left;vertical-align:top}
.entry-body th{background:var(--c-primary-soft);font-weight:600}
.entry-body hr{margin:32px 0;border:0;border-top:1px solid var(--c-line)}
/* 内联会员提示 */
.inline-promo{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  margin:28px 0 0;padding:18px 20px;border-left:3px solid var(--c-primary);
  background:var(--c-primary-soft);border-radius:0 var(--r-md) var(--r-md) 0;
}
.inline-promo strong{display:block;font-size:15px;font-weight:600;color:var(--c-ink);margin-bottom:4px}
.inline-promo p{font-size:14px;line-height:1.7;color:var(--c-ink-2)}
/* 空态 */
.empty-state{padding:56px 0;text-align:center}
.empty-state svg{margin:0 auto 16px;color:var(--c-muted)}
.empty-state p{font-size:15px;color:var(--c-ink-2);margin-bottom:20px}
/* 文末标签与分享 */
.entry-foot{margin-top:32px;padding-top:24px;border-top:1px solid var(--c-line-2)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.share-row{display:flex;align-items:center;gap:10px;margin-top:20px}
.share-label{font-size:13px;color:var(--c-muted);margin-right:2px}
.share-btn{
  display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;
  border:1px solid var(--c-line);border-radius:10px;color:var(--c-ink-2);
  transition:all .18s ease-out;
}
.share-btn:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-soft)}
/* 上下篇 */
.pager-block{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.pager-card{
  display:flex;flex-direction:column;gap:8px;padding:20px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-lg);box-shadow:var(--sh-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.pager-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--c-primary-line)}
.pager-card .pager-label{font-size:13px;color:var(--c-muted)}
.pager-card .pager-title{
  font-size:16px;line-height:1.6;font-weight:600;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.pager-card:hover .pager-title{color:var(--c-primary)}
.pager-card.is-right{text-align:right;align-items:flex-end}
/* 相关推荐 */
.related-block{margin-top:var(--gap-block)}
.block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}
.block-head h2{font-size:26px;line-height:1.4}
.block-head .block-desc{font-size:14px;color:var(--c-ink-2);margin-top:8px}
.card-grid{display:grid;gap:28px}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.card{
  display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.card-media{position:relative;background:var(--c-primary-soft)}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.card-media .badge{position:absolute;left:14px;top:14px}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{
  font-size:17px;line-height:1.6;font-weight:600;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card:hover .card-title{color:var(--c-primary)}
.card-desc{
  font-size:14px;line-height:1.75;color:var(--c-ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{margin-top:auto;font-size:13px;color:var(--c-muted);display:flex;gap:10px;align-items:center}
/* 返回入口 */
.back-row{display:flex;justify-content:center;margin-top:36px}
/* ============ 侧栏 ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--sh-1);
}
.side-title{
  font-size:14px;font-weight:600;color:var(--c-ink);margin-bottom:14px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
details.side-card>summary{list-style:none;cursor:pointer;margin-bottom:0}
details.side-card>summary::-webkit-details-marker{display:none}
details.side-card>summary::after{
  content:"";width:8px;height:8px;border-right:1.6px solid var(--c-muted);border-bottom:1.6px solid var(--c-muted);
  transform:rotate(45deg);transition:transform .2s ease-out;margin-left:8px;
}
details.side-card[open]>summary{margin-bottom:14px}
details.side-card[open]>summary::after{transform:rotate(-135deg)}
.toc{display:flex;flex-direction:column}
.toc a{
  position:relative;display:block;padding:8px 0 8px 12px;font-size:14px;line-height:1.6;
  color:var(--c-ink-2);border-left:2px solid transparent;
}
.toc a:hover{color:var(--c-primary)}
.toc a.is-sub{padding-left:24px;font-size:13px;color:var(--c-muted)}
.toc a.is-active{color:var(--c-primary);border-left-color:var(--c-primary);font-weight:600}
.toc-empty{font-size:13px;color:var(--c-muted)}
.hot-posts li{display:flex;gap:10px;padding:12px 0;border-bottom:1px solid var(--c-line-2)}
.hot-posts li:last-child{border-bottom:0;padding-bottom:0}
.hot-posts .num{
  flex:0 0 20px;font-size:15px;font-weight:600;color:var(--c-primary);line-height:1.6;
}
.hot-posts a{
  font-size:14px;line-height:1.6;color:var(--c-ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.hot-posts a:hover{color:var(--c-primary)}
.side-join{background:var(--c-primary-soft);border-color:var(--c-primary-line)}
.side-join p{font-size:13px;line-height:1.75;color:var(--c-ink-2);margin-bottom:14px}
.side-join strong{display:block;font-size:15px;color:var(--c-ink);margin-bottom:6px;font-weight:600}
/* ============ CTA 带 ============ */
.cta-band{
  position:relative;background:var(--c-deep);color:#fff;overflow:hidden;
  padding:64px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.08;
}
.cta-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.cta-band h2{color:#fff;font-size:28px;line-height:1.4}
.cta-band .cta-desc{color:rgba(255,255,255,.78);font-size:15px;line-height:1.85;margin-top:14px}
.cta-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.cta-tags span{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);
  font-size:13px;color:rgba(255,255,255,.88);
}
.cta-form{
  background:#fff;border-radius:var(--r-lg);padding:26px;box-shadow:var(--sh-3);
  display:flex;flex-direction:column;gap:14px;
}
.cta-form h3{font-size:17px;color:var(--c-ink);margin-bottom:2px}
.field label{display:block;font-size:14px;font-weight:500;color:var(--c-ink-2);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 16px;border:1px solid var(--c-line);border-radius:var(--r-sm);
  background:#fff;font-size:15px;color:var(--c-ink);transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.field textarea{height:auto;min-height:96px;padding:12px 16px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--c-muted)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,143,.18);
}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--c-ink-2);line-height:1.6}
.check-row input{width:18px;height:18px;flex:0 0 18px;margin-top:2px;accent-color:var(--c-primary)}
/* ============ 页脚 ============ */
.site-footer{background:var(--c-deep);color:rgba(255,255,255,.72);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:#fff}
.footer-brand .brand-mark::after{border-left-color:var(--c-deep)}
.footer-note{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.66)}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:12px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-contact li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:rgba(255,255,255,.72)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:rgba(255,255,255,.56);
}
/* ============ 回到顶部 ============ */
.back-top{
  position:fixed;right:24px;bottom:24px;width:56px;height:56px;border-radius:50%;
  background:#fff;border:1px solid var(--c-line);box-shadow:var(--sh-3);color:var(--c-primary);
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(8px);z-index:50;
  transition:opacity .22s ease-out,transform .22s ease-out,visibility .22s;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}
/* ============ 响应式 ============ */
@media(max-width:1439px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:40px}
}
@media(max-width:1023px){
  :root{--gap-block:72px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px}
  .article-side{position:static;top:auto}
  .article-title{font-size:30px}
  .entry{padding:28px 26px}
  .cta-inner{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hot-list{display:none}
}
@media(max-width:639px){
  :root{--gap-block:56px}
  .brand-bar{height:56px}
  .brand-text{font-size:17px}
  .link-quiet{display:none}
  .nav-toggle{display:inline-flex}
  .article-head{padding:20px 0 28px}
  .article-title{font-size:24px;line-height:1.42;margin:12px 0 16px}
  .article-body{padding:28px 0 var(--gap-block)}
  .entry{padding:22px 18px;border-radius:var(--r-md)}
  .entry-body{font-size:16px;line-height:1.85}
  .entry-body h2{font-size:20px;margin:32px 0 14px}
  .entry-body h3{font-size:18px;margin:26px 0 10px}
  .entry-body table{display:block;overflow-x:auto;white-space:nowrap}
  .inline-promo{flex-direction:column;align-items:flex-start;gap:14px}
  .pager-block{grid-template-columns:1fr}
  .pager-card.is-right{text-align:left;align-items:flex-start}
  .grid-3{grid-template-columns:1fr;gap:16px}
  .block-head h2{font-size:22px}
  .cta-band{padding:44px 0}
  .cta-band h2{font-size:22px}
  .cta-form{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .search-panel{width:calc(100vw - 40px);right:-8px}
  .chanel-inner{justify-content:space-between}
  /* 移动端抽屉导航 */
  .nav-toggle{display:inline-flex}
  .channel-bar{
    position:fixed;top:0;right:0;width:84vw;max-width:360px;height:100vh;
    background:#fff;transform:translateX(102%);transition:transform .26s ease-out;
    z-index:90;box-shadow:-10px 0 40px rgba(18,33,46,.16);overflow-y:auto;
    border-top:0;
  }
  body.nav-open .channel-bar{transform:translateX(0)}
  body.nav-open{overflow:hidden}
  body.nav-open::after{
    content:"";position:fixed;inset:0;background:rgba(14,43,68,.32);z-index:80;
  }
  .channel-inner{display:block;padding:24px 20px}
  .channel-list{display:block;margin-bottom:8px}
  .channel-list a{height:52px;line-height:52px;padding:0;border-bottom:1px solid var(--c-line-2);border-radius:0;font-size:15px}
  .channel-list a.is-active::after{display:none}
  .hot-list{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0}
  .fresh-flag{margin-left:0;margin-top:18px}
  .back-top{right:16px;bottom:16px;width:50px;height:50px}
}

/* roulang page: category3 */
:root{
  --c-primary:#1D5B8F;--c-primary-dark:#164A75;--c-primary-soft:#EAF2F8;--c-primary-line:#CFE0EC;
  --c-ink:#12212E;--c-ink-2:#43586B;--c-muted:#7B8C9B;
  --c-bg:#F5F7FA;--c-surface:#FFFFFF;--c-line:#E1E8EF;--c-line-2:#EEF2F6;
  --c-accent:#F0A02E;--c-accent-soft:#FDF3E2;--c-success:#1FA37A;
  --c-deep:#0E2B44;--c-deep-2:#143A5B;
  --r-xl:16px;--r-md:12px;--r-sm:10px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(18,33,46,.04),0 6px 18px rgba(18,33,46,.05);
  --sh-2:0 2px 4px rgba(18,33,46,.06),0 14px 32px rgba(18,33,46,.10);
  --sh-3:0 8px 24px rgba(18,33,46,.08);
  --sec:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--c-bg);color:var(--c-ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.85;font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .16s ease-out,border-color .16s ease-out,background-color .16s ease-out}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:none;box-shadow:0 0 0 3px rgba(29,91,143,.28);border-radius:6px;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit}
.num{font-variant-numeric:tabular-nums}
.container{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
.grid-container{max-width:1200px;padding-left:32px;padding-right:32px}
.grid-margin-x{margin-left:-14px;margin-right:-14px}
.grid-margin-x>.cell{padding-left:14px;padding-right:14px}
.sec{padding-top:var(--sec)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.sec-head h2{font-size:30px;line-height:1.35;font-weight:600;letter-spacing:-.2px}
.sec-head .sec-sub{font-size:15px;color:var(--c-ink-2);margin-top:8px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:15px;font-weight:500}
.text-link svg{transition:transform .16s ease-out}
.text-link:hover{text-decoration:underline}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:70;background:rgba(245,247,250,.92);backdrop-filter:saturate(140%) blur(6px);transition:background-color .2s ease-out,box-shadow .2s ease-out}
.brand-bar{border-bottom:1px solid transparent;transition:height .2s ease-out,background-color .2s ease-out,border-color .2s ease-out}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px;position:relative}
.site-header.is-stuck{background:var(--c-surface);box-shadow:var(--sh-3)}
.site-header.is-stuck .brand-bar{border-bottom-color:var(--c-line)}
.site-header.is-stuck .brand-inner{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:26px;height:26px;border-radius:8px;background:var(--c-primary);position:relative;box-shadow:var(--sh-1)}
.brand-mark::after{content:"";position:absolute;right:5px;top:5px;width:9px;height:9px;border-radius:3px;background:var(--c-accent)}
.brand-text{font-size:18px;font-weight:700;letter-spacing:.2px;color:var(--c-ink)}
.brand-actions{display:flex;align-items:center;gap:14px;position:relative}
.icon-btn{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--c-line);background:var(--c-surface);border-radius:var(--r-sm);color:var(--c-ink-2);cursor:pointer;transition:.16s ease-out}
.icon-btn:hover{color:var(--c-primary);border-color:var(--c-primary)}
.link-quiet{font-size:14px;color:var(--c-ink-2)}
.link-quiet:hover{color:var(--c-primary)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 24px;border-radius:var(--r-sm);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .16s ease-out,background-color .16s ease-out,box-shadow .16s ease-out,color .16s ease-out,border-color .16s ease-out;white-space:nowrap}
.btn-sm{height:32px;padding:0 16px;font-size:14px}
.btn-lg{height:52px;padding:0 30px;font-size:16px}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-outline{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-line)}
.btn-outline:hover{border-color:var(--c-primary);color:var(--c-primary);transform:translateY(-1px)}
.btn-cta{background:var(--c-primary)}
.nav-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--c-line);background:var(--c-surface);border-radius:var(--r-sm);color:var(--c-ink);cursor:pointer}
.search-panel{position:absolute;right:0;top:52px;width:380px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);box-shadow:var(--sh-2);padding:16px;opacity:0;transform:translateY(-8px);pointer-events:none;transition:.18s ease-out}
.search-panel.is-open{opacity:1;transform:translateY(0);pointer-events:auto}
.search-panel form{display:flex;gap:8px}
.search-panel input{flex:1;height:44px;border:1px solid var(--c-line);border-radius:var(--r-sm);padding:0 14px;font-size:14px;color:var(--c-ink);background:var(--c-surface)}
.search-panel input::placeholder{color:var(--c-muted)}
.search-hint{font-size:13px;color:var(--c-muted);margin-top:10px;line-height:1.6}
.channel-bar{border-bottom:1px solid var(--c-line);background:var(--c-surface);transition:.2s ease-out}
.channel-inner{display:flex;align-items:center;gap:22px;height:44px}
.channel-list{display:flex;align-items:center;gap:26px;flex:0 0 auto}
.channel-list a{position:relative;display:inline-flex;align-items:center;height:44px;font-size:15px;font-weight:500;color:var(--c-ink-2)}
.channel-list a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--c-primary);transform:scaleX(0);transition:transform .18s ease-out}
.channel-list a:hover{color:var(--c-primary)}
.channel-list a.is-active{color:var(--c-primary);font-weight:600}
.channel-list a.is-active::after{transform:scaleX(1)}
.hot-list{display:flex;align-items:center;gap:8px;overflow:hidden;flex:1 1 auto}
.hot-list a{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);background:var(--c-primary-soft);color:var(--c-primary);font-size:12px;white-space:nowrap;transition:.16s ease-out}
.hot-list a:hover{background:var(--c-primary);color:#fff}
.fresh-flag{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c-muted);flex:0 0 auto}
.fresh-flag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c-accent)}
.drawer-search,.drawer-cta{display:none}
.nav-overlay{position:fixed;inset:0;background:rgba(14,43,68,.32);opacity:0;pointer-events:none;transition:opacity .2s ease-out;z-index:80}
body.nav-open .nav-overlay{opacity:1;pointer-events:auto}

/* ---------- page head ---------- */
.page-head{background:var(--c-surface);border-bottom:1px solid var(--c-line);padding:36px 0 40px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:18px}
.breadcrumb a{color:var(--c-ink-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:var(--c-line)}
.breadcrumb .now{color:var(--c-muted)}
.page-head h1{font-size:42px;line-height:1.25;letter-spacing:-.5px;font-weight:600;max-width:860px}
.page-head .lead{font-size:17px;line-height:1.8;color:var(--c-ink-2);max-width:820px;margin-top:16px}
.head-stats{display:flex;flex-wrap:wrap;gap:0;margin-top:26px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);box-shadow:var(--sh-1);overflow:hidden;max-width:760px}
.head-stats div{flex:1 1 200px;padding:16px 22px;border-right:1px solid var(--c-line-2)}
.head-stats div:last-child{border-right:0}
.head-stats b{display:block;font-size:24px;font-weight:600;color:var(--c-primary);line-height:1.3}
.head-stats span{font-size:13px;color:var(--c-muted)}
.search-hero{margin-top:28px;max-width:640px}
.search-box{display:flex;align-items:center;gap:12px;height:52px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-sm);padding:0 16px;transition:.16s ease-out}
.search-box:focus-within{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,143,.18)}
.search-box svg{flex:0 0 auto;color:var(--c-muted)}
.search-box input{flex:1;border:0;outline:none;background:transparent;font-size:15px;color:var(--c-ink);height:100%}
.search-box input::placeholder{color:var(--c-muted)}
.search-feel{font-size:13px;color:var(--c-muted);margin-top:10px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.chip{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);border:1px solid var(--c-line);background:var(--c-surface);font-size:13px;color:var(--c-ink-2);transition:.16s ease-out}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary)}
.chip.is-on{background:var(--c-primary);border-color:var(--c-primary);color:#fff}

/* ---------- quick entry cards ---------- */
.card-grid{display:grid;gap:28px}
.quick-grid{grid-template-columns:repeat(4,1fr)}
.entry-card{display:flex;flex-direction:column;gap:12px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);padding:24px;box-shadow:var(--sh-1);transition:.18s ease-out}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--c-primary-line)}
.entry-icon{width:44px;height:44px;border-radius:12px;background:var(--c-primary-soft);color:var(--c-primary);display:flex;align-items:center;justify-content:center}
.entry-card h3{font-size:18px;font-weight:600}
.entry-card p{font-size:14px;line-height:1.75;color:var(--c-ink-2)}
.entry-card .text-link{margin-top:auto;font-size:14px}

/* ---------- help layout ---------- */
.help-layout{display:grid;grid-template-columns:260px 1fr;gap:40px;align-items:start}
.help-side{position:sticky;top:118px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);padding:20px;box-shadow:var(--sh-1);max-height:calc(100vh - 150px);overflow:auto}
.help-side h3{font-size:14px;font-weight:600;color:var(--c-ink);letter-spacing:.2px;margin-bottom:14px}
.anchor-group+.anchor-group{margin-top:22px;padding-top:20px;border-top:1px solid var(--c-line-2)}
.anchor-group h4{font-size:13px;font-weight:600;color:var(--c-muted);margin-bottom:8px}
.anchor-link{position:relative;display:flex;align-items:center;height:40px;font-size:14px;color:var(--c-ink-2);padding-left:12px;border-left:2px solid transparent;transition:.16s ease-out}
.anchor-link:hover{color:var(--c-primary)}
.anchor-link.is-current{color:var(--c-primary);font-weight:600;border-left-color:var(--c-primary);background:var(--c-primary-soft);border-radius:0 8px 8px 0}
.faq-group+.faq-group{margin-top:48px}
.group-title{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:600;line-height:1.4;margin-bottom:8px}
.group-title::before{content:"";width:4px;height:20px;border-radius:2px;background:var(--c-primary);flex:0 0 auto}
.group-lead{font-size:14px;color:var(--c-muted);margin:0 0 18px 16px}
.acc-item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);margin-bottom:12px;overflow:hidden;transition:box-shadow .18s ease-out,border-color .18s ease-out}
.acc-item:hover{border-color:var(--c-primary-line);box-shadow:var(--sh-1)}
.acc-item.is-open{border-color:var(--c-primary-line);box-shadow:var(--sh-1)}
.acc-head{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;padding:16px 20px;background:transparent;border:0;text-align:left;font-size:16px;font-weight:500;color:var(--c-ink);cursor:pointer;transition:.16s ease-out}
.acc-head:hover{color:var(--c-primary)}
.acc-icon{flex:0 0 auto;width:22px;height:22px;position:relative;color:var(--c-primary)}
.acc-icon::before,.acc-icon::after{content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;transform:translate(-50%,-50%);transition:transform .22s ease-out,opacity .22s ease-out}
.acc-icon::before{width:14px;height:2px}
.acc-icon::after{width:2px;height:14px}
.acc-item.is-open .acc-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.acc-body{max-height:0;overflow:hidden;transition:max-height .22s ease-out}
.acc-inner{padding:0 20px 20px;border-top:1px solid var(--c-line-2);background:var(--c-primary-soft);font-size:15px;line-height:1.8;color:var(--c-ink-2)}
.acc-inner p{padding-top:16px}
.acc-inner p+p{padding-top:10px}
.acc-inner .mini-link{display:inline-flex;align-items:center;gap:6px;margin-top:12px;color:var(--c-primary);font-size:14px;font-weight:500}
.acc-inner .mini-link:hover{text-decoration:underline}

/* ---------- contact ---------- */
.contact-band{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);box-shadow:var(--sh-1);padding:32px}
.contact-figure{border-radius:var(--r-md);overflow:hidden;border:1px solid var(--c-line);margin-bottom:22px;aspect-ratio:16/9;background:var(--c-primary-soft)}
.contact-figure img{width:100%;height:100%;object-fit:cover}
.contact-list li{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--c-line-2)}
.contact-list li:last-child{border-bottom:0}
.contact-list .ico{flex:0 0 auto;width:38px;height:38px;border-radius:10px;background:var(--c-primary-soft);color:var(--c-primary);display:flex;align-items:center;justify-content:center}
.contact-list b{display:block;font-size:15px;font-weight:600}
.contact-list span{font-size:14px;color:var(--c-ink-2)}
.form-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-xl);padding:28px}
.form-card h3{font-size:20px;font-weight:600;margin-bottom:6px}
.form-card .form-note{font-size:13px;color:var(--c-muted);margin-bottom:22px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:500;margin-bottom:8px;color:var(--c-ink)}
.field input,.field select,.field textarea{width:100%;height:48px;border:1px solid var(--c-line);border-radius:var(--r-sm);padding:0 16px;font-size:15px;color:var(--c-ink);background:var(--c-surface);font-family:inherit;transition:border-color .16s ease-out,box-shadow .16s ease-out}
.field textarea{height:auto;min-height:120px;padding:14px 16px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--c-muted)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,143,.18)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--c-ink-2);line-height:1.7}
.check input{appearance:none;-webkit-appearance:none;width:18px;height:18px;flex:0 0 auto;margin-top:3px;border:1px solid var(--c-line);border-radius:5px;background:var(--c-surface);cursor:pointer;position:relative;transition:.16s ease-out}
.check input:checked{background:var(--c-primary);border-color:var(--c-primary)}
.check input:checked::after{content:"";position:absolute;left:5px;top:1px;width:5px;height:10px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.form-actions{margin-top:22px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.form-status{font-size:13px;color:var(--c-success)}
.form-status.is-error{color:var(--c-accent)}

/* ---------- cta strip ---------- */
.cta-strip{display:flex;align-items:center;justify-content:space-between;gap:28px;background:var(--c-primary-soft);border:1px solid var(--c-primary-line);border-radius:var(--r-xl);padding:32px;flex-wrap:wrap}
.cta-strip h2{font-size:24px;font-weight:600;line-height:1.4}
.cta-strip p{font-size:15px;color:var(--c-ink-2);margin-top:8px;max-width:620px}
.cta-strip .cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--c-deep);color:rgba(255,255,255,.9);margin-top:var(--sec);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col ul a:hover{color:#fff;text-decoration:underline}
.footer-brand .brand-text{color:#fff}
.footer-note{font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);margin-top:16px;max-width:340px}
.footer-contact li{display:flex;justify-content:space-between;gap:14px;font-size:14px;color:rgba(255,255,255,.68);border-bottom:1px solid rgba(255,255,255,.12);padding-bottom:10px}
.footer-contact li span:last-child{color:#fff}
.footer-bottom{margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.6)}
.footer-bottom p:last-child{max-width:640px}

/* ---------- to top ---------- */
.to-top{position:fixed;right:24px;bottom:24px;width:56px;height:56px;border-radius:50%;background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--sh-3);color:var(--c-primary);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s ease-out;z-index:60}
.to-top.is-show{opacity:1;pointer-events:auto;transform:translateY(0)}
.to-top:hover{box-shadow:var(--sh-2);border-color:var(--c-primary)}

/* ---------- responsive ---------- */
@media(max-width:1439px){
  .container{padding:0 32px}
}
@media(max-width:1023px){
  :root{--sec:72px}
  .container{padding:0 24px}
  .grid-container{padding-left:24px;padding-right:24px}
  .hot-list{display:none}
  .page-head h1{font-size:34px}
  .sec-head h2{font-size:26px}
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .help-layout{grid-template-columns:1fr;gap:28px}
  .help-side{position:static;max-height:none}
  .anchor-group{display:inline-block;vertical-align:top;margin:0 18px 0 0}
  .field-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .contact-band{padding:24px}
}
@media(max-width:767px){
  .page-head h1{font-size:28px}
  .head-stats div{flex:1 1 100%;border-right:0;border-bottom:1px solid var(--c-line-2)}
  .head-stats div:last-child{border-bottom:0}
  .quick-grid{grid-template-columns:1fr}
  .cta-strip{padding:24px}
  .cta-strip h2{font-size:21px}
}
@media(max-width:639px){
  :root{--sec:56px}
  .container{padding:0 20px}
  .grid-container{padding-left:20px;padding-right:20px}
  .grid-margin-x{margin-left:-8px;margin-right:-8px}
  .grid-margin-x>.cell{padding-left:8px;padding-right:8px}
  .link-quiet,.btn-cta{display:none}
  .nav-toggle{display:inline-flex}
  .search-panel{display:none}
  .channel-bar{position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:var(--c-surface);border-bottom:0;border-left:1px solid var(--c-line);box-shadow:var(--sh-3);transform:translateX(102%);transition:transform .24s ease-out;z-index:90;overflow-y:auto}
  body.nav-open .channel-bar{transform:translateX(0)}
  .channel-inner{display:block;height:auto;padding:20px 20px 40px}
  .drawer-search{display:flex;gap:8px;margin-bottom:18px}
  .drawer-search input{flex:1;height:44px;border:1px solid var(--c-line);border-radius:var(--r-sm);padding:0 14px;font-size:14px}
  .channel-list{display:block;margin-bottom:20px}
  .channel-list li{border-bottom:1px solid var(--c-line-2)}
  .channel-list a{display:flex;height:52px;font-size:16px;width:100%}
  .channel-list a::after{display:none}
  .channel-list a.is-active{color:var(--c-primary)}
  .hot-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
  .fresh-flag{display:none}
  .drawer-cta{display:inline-flex;width:100%}
  .brand-text{font-size:17px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:10px}
  .acc-head{font-size:15px;padding:14px 16px;min-height:56px}
  .acc-inner{padding:0 16px 18px}
  .group-title{font-size:20px}
  .contact-band{padding:20px}
  .form-card{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .to-top{right:16px;bottom:16px;width:48px;height:48px}
}

/* roulang page: category2 */
/* ===================== 设计令牌 ===================== */
:root{
  --c-primary:#1D5B8F;
  --c-primary-dark:#164A75;
  --c-primary-soft:#EAF2F8;
  --c-primary-line:#CFE0EC;
  --c-ink:#12212E;
  --c-ink-2:#43586B;
  --c-muted:#7B8C9B;
  --c-bg:#F5F7FA;
  --c-surface:#FFFFFF;
  --c-line:#E1E8EF;
  --c-line-2:#EEF2F6;
  --c-accent:#F0A02E;
  --c-accent-soft:#FDF3E2;
  --c-success:#1FA37A;
  --c-deep:#0E2B44;
  --c-deep-2:#143A5B;
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(18,33,46,.04),0 6px 18px rgba(18,33,46,.05);
  --sh-2:0 2px 4px rgba(18,33,46,.06),0 14px 32px rgba(18,33,46,.10);
  --sh-3:0 8px 24px rgba(18,33,46,.08);
  --ease:cubic-bezier(.2,.6,.3,1);
}

/* ===================== 基础重置 ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4{margin:0;font-weight:600;color:var(--c-ink)}
h1{font-size:42px;line-height:1.25;letter-spacing:-.5px}
h2{font-size:30px;line-height:1.35}
h3{font-size:20px;line-height:1.5}
h4{font-size:15px;line-height:1.5}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-sm)}
a{color:inherit;text-decoration:none;transition:color .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease)}
button{font:inherit;cursor:pointer;border:0;background:none}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid rgba(29,91,143,.28);outline-offset:2px;border-radius:6px}
::selection{background:var(--c-primary-line);color:var(--c-ink)}

/* ===================== 容器 ===================== */
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:32px;padding-right:32px}
@media (max-width:1023px){.container{padding-left:24px;padding-right:24px}}
@media (max-width:639px){.container{padding-left:20px;padding-right:20px}}

/* ===================== 通用按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-ghost{background:#fff;color:var(--c-ink);border-color:var(--c-line)}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-sm{height:32px;padding:0 16px;font-size:13px;border-radius:8px}
.btn-lg{height:52px;padding:0 28px}
.btn[disabled],.btn.is-disabled{background:var(--c-line);color:var(--c-muted);border-color:var(--c-line);pointer-events:none}

/* ===================== 徽章 / 标签 ===================== */
.badge{display:inline-flex;align-items:center;gap:6px;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:500;line-height:1}
.badge-cat{background:var(--c-primary-soft);color:var(--c-primary)}
.badge-accent{background:var(--c-accent-soft);color:var(--c-accent)}
.badge-success{background:rgba(31,163,122,.10);color:var(--c-success)}
.badge-muted{background:#F1F4F8;color:var(--c-muted)}

/* ===================== 文字链 ===================== */
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:500}
.link-arrow svg{transition:transform .18s var(--ease)}
.link-arrow:hover{text-decoration:underline}
.link-arrow:hover svg{transform:translateX(3px)}

/* ===================== 导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.site-header.is-stuck{box-shadow:var(--sh-3)}
.brand-bar{display:flex;align-items:center;height:64px;transition:height .2s var(--ease)}
.site-header.is-stuck .brand-bar{height:56px}
.brand-inner{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{position:relative;width:26px;height:26px;border-radius:8px;background:var(--c-primary);flex:0 0 auto}
.brand-mark::after{content:"";position:absolute;left:8px;top:8px;width:10px;height:10px;border-radius:3px;background:#fff}
.brand-text{font-size:18px;font-weight:600;letter-spacing:.2px;color:var(--c-ink)}
.brand-actions{display:flex;align-items:center;gap:16px;position:relative}
.icon-btn{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--c-line);
  background:#fff;color:var(--c-ink-2);display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .16s var(--ease),color .16s var(--ease),background-color .16s var(--ease);
}
.icon-btn:hover{border-color:var(--c-primary);color:var(--c-primary)}
.link-quiet{font-size:14px;color:var(--c-ink-2)}
.link-quiet:hover{color:var(--c-primary)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--c-line);color:var(--c-ink-2);align-items:center;justify-content:center;background:#fff}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary)}
.search-panel{
  position:absolute;top:calc(100% + 12px);right:0;width:360px;padding:16px;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);box-shadow:var(--sh-3);
  opacity:0;visibility:hidden;transform:translateY(-6px);z-index:70;
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
}
.search-panel.is-open{opacity:1;visibility:visible;transform:none}
.search-panel form{display:flex;gap:8px}
.search-panel input{
  flex:1 1 auto;min-width:0;height:44px;padding:0 14px;border:1px solid var(--c-line);
  border-radius:10px;background:#fff;font-size:14px;
}
.search-panel input:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(29,91,143,.18)}
.search-hint{margin-top:10px;font-size:13px;color:var(--c-muted);line-height:1.6}

.channel-bar{border-top:1px solid var(--c-line-2);background:var(--c-surface)}
.channel-inner{display:flex;align-items:center;gap:24px;height:44px}
.channel-list{display:flex;align-items:center;gap:24px;height:44px}
.channel-list a{position:relative;display:flex;align-items:center;height:44px;font-size:15px;color:var(--c-ink-2)}
.channel-list a:hover{color:var(--c-primary)}
.channel-list a.is-active{color:var(--c-primary);font-weight:600}
.channel-list a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--c-primary);border-radius:2px}
.hot-list{display:flex;align-items:center;gap:8px;margin-left:auto}
.hot-list a{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);font-size:12.5px;line-height:1;
}
.hot-list a:hover{background:var(--c-primary-line)}
.fresh-flag{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--c-muted)}
.fresh-flag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.nav-backdrop{display:none}

@media (min-width:1024px){
  .site-header.is-stuck{display:flex;align-items:center;gap:24px;padding:0 32px;max-width:1200px;margin:0 auto}
  .site-header.is-stuck .brand-bar{height:56px;flex:0 0 auto}
  .site-header.is-stuck .brand-inner{padding-left:0;padding-right:0;max-width:none}
  .site-header.is-stuck .channel-bar{border-top:0;flex:1 1 auto;min-width:0}
  .site-header.is-stuck .channel-inner{padding-left:0;padding-right:0;height:56px}
  .site-header.is-stuck .channel-list{height:56px}
  .site-header.is-stuck .channel-list a{height:56px}
  .site-header.is-stuck .hot-list,.site-header.is-stuck .fresh-flag{display:none}
}
@media (min-width:640px) and (max-width:1023px){
  .hot-list{display:none}
}

@media (max-width:639px){
  .nav-toggle{display:inline-flex}
  .link-quiet{display:none}
  .search-panel{width:calc(100vw - 40px);right:-8px}
  .search-panel form{flex-wrap:wrap}
  .search-panel input{flex:1 1 100%}
  .channel-bar{
    position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:90;
    background:#fff;padding:76px 20px 28px;overflow-y:auto;
    transform:translateX(102%);transition:transform .26s var(--ease);
    border-top:0;box-shadow:var(--sh-3);
  }
  .channel-bar.is-open{transform:none}
  .channel-inner{display:block;height:auto}
  .channel-list{display:block;height:auto}
  .channel-list li{border-bottom:1px solid var(--c-line)}
  .channel-list a{height:52px;font-size:16px}
  .channel-list a.is-active::after{display:none}
  .hot-list{display:flex;flex-wrap:wrap;margin:20px 0 0;gap:8px}
  .fresh-flag{margin-top:18px}
  .nav-backdrop{
    display:block;position:fixed;inset:0;z-index:80;background:rgba(14,43,68,.32);
    opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s;
  }
  .nav-backdrop.is-open{opacity:1;visibility:visible}
  body.nav-locked{overflow:hidden}
}

/* ===================== 栅格间距覆盖 ===================== */
.grid-x.gap-32{margin-left:-16px;margin-right:-16px}
.grid-x.gap-32 > .cell{padding-left:16px;padding-right:16px}
.grid-x.gap-28{margin-left:-14px;margin-right:-14px}
.grid-x.gap-28 > .cell{padding-left:14px;padding-right:14px;margin-bottom:28px}
@media (max-width:639px){
  .grid-x.gap-32{margin-left:-10px;margin-right:-10px}
  .grid-x.gap-32 > .cell{padding-left:10px;padding-right:10px}
  .grid-x.gap-28{margin-left:-8px;margin-right:-8px}
  .grid-x.gap-28 > .cell{padding-left:8px;padding-right:8px;margin-bottom:16px}
}

/* ===================== 页面头 ===================== */
.page-head{position:relative;background:var(--c-primary-soft);border-bottom:1px solid var(--c-primary-line);overflow:hidden}
.page-head::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.png);
  background-size:cover;background-position:center;
  opacity:.12;pointer-events:none;
}
.page-head .container{position:relative;z-index:1;padding-top:32px;padding-bottom:44px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:20px}
.breadcrumb a{color:var(--c-ink-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb span.sep{color:var(--c-muted)}
.breadcrumb .is-current{color:var(--c-muted)}
.page-head-grid{align-items:center}
.page-head-main .badge{margin-bottom:14px}
.page-head-main h1{margin-bottom:14px;max-width:820px}
.lead{font-size:17px;line-height:1.8;color:var(--c-ink-2);max-width:760px}
.page-head-side{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-1);
}
.page-head-side .badge-accent{margin-bottom:16px}
.stat-row{display:flex;align-items:stretch;gap:0}
.stat{flex:1 1 0;min-width:0;padding:0 12px;border-left:1px solid var(--c-line-2)}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{display:block;font-size:26px;font-weight:600;color:var(--c-primary);line-height:1.2}
.stat-label{display:block;font-size:13px;color:var(--c-muted);margin-top:4px}
.head-note{margin-top:16px;padding-top:14px;border-top:1px solid var(--c-line-2);font-size:13px;color:var(--c-muted)}
@media (max-width:1023px){
  .page-head-grid .cell:first-child{margin-bottom:24px}
}
@media (max-width:639px){
  .page-head h1{font-size:28px;letter-spacing:0}
  .lead{font-size:16px}
}

/* ===================== 板块节奏 ===================== */
main{padding-bottom:96px}
.section{padding-top:88px}
@media (max-width:1023px){.section{padding-top:72px}}
@media (max-width:639px){.section{padding-top:56px};main{padding-bottom:64px}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.section-sub{margin-top:10px;font-size:16px;color:var(--c-ink-2);line-height:1.75;max-width:680px}
@media (max-width:639px){.section-head{margin-bottom:24px}}

/* ===================== 分段控件 ===================== */
.segmented{display:inline-flex;align-items:center;gap:4px;padding:4px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-pill)}
.segmented button{
  height:36px;padding:0 20px;border-radius:var(--r-pill);font-size:14px;font-weight:500;
  color:var(--c-ink-2);transition:background-color .18s var(--ease),color .18s var(--ease);
}
.segmented button:hover{color:var(--c-primary)}
.segmented button.is-active{background:var(--c-primary);color:#fff}

/* ===================== 对比表 ===================== */
.plan-panel{display:none}
.plan-panel.is-active{display:block}
.plan-scroll{overflow-x:auto;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1)}
.plan-compare{min-width:600px}
.plan-row{
  display:grid;grid-template-columns:1.6fr 1fr 1fr;align-items:center;
  min-height:56px;padding:12px 20px;border-bottom:1px solid var(--c-line-2);font-size:15px;
}
.plan-row:last-child{border-bottom:0}
.plan-row:nth-child(even){background:#F9FBFD}
.plan-row > span:first-child{color:var(--c-ink-2);padding-right:16px}
.plan-row-head{background:var(--c-primary-soft);min-height:52px;font-weight:600;padding:12px 20px}
.plan-row-head > span{color:var(--c-primary)}
.plan-row-head:nth-child(even){background:var(--c-primary-soft)}
.state-yes{display:inline-flex;align-items:center;gap:6px;color:var(--c-success);font-size:14px}
.state-no{color:var(--c-muted)}
.state-num{font-size:15px;color:var(--c-ink);font-variant-numeric:tabular-nums}
.panel-note{margin-top:14px;font-size:13px;color:var(--c-muted)}

/* ===================== 等级卡片 ===================== */
.level-card{
  position:relative;display:flex;flex-direction:column;height:100%;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);overflow:hidden;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.level-card::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--c-primary)}
.level-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.level-media{width:100%;aspect-ratio:16 / 9;object-fit:cover;border:1px solid var(--c-line);border-radius:var(--r-sm);background:var(--c-primary-soft);margin-bottom:18px}
.level-top{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.level-num{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:44px;height:28px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--c-primary-soft);color:var(--c-primary);font-size:13px;font-weight:600;
}
.level-card h3{font-size:18px;margin-bottom:12px}
.level-list li{position:relative;padding-left:16px;font-size:14px;color:var(--c-ink-2);line-height:1.9}
.level-list li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--c-primary-line)}
.level-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--c-line-2)}

/* ===================== 开通流程 ===================== */
.steps{position:relative;padding-top:8px}
.steps::before{
  content:"";position:absolute;left:12%;right:12%;top:24px;
  border-top:1px dashed var(--c-primary-line);
}
.step{position:relative;text-align:center;padding:0 8px}
.step-num{
  position:relative;z-index:1;width:32px;height:32px;margin:0 auto 14px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;border:1.5px solid var(--c-primary);background:#fff;
  color:var(--c-primary);font-size:14px;font-weight:600;
}
.step h3{font-size:16px;margin-bottom:8px}
.step p{font-size:13px;line-height:1.8;color:var(--c-muted)}
@media (max-width:1023px){
  .steps::before{display:none}
}
@media (max-width:639px){
  .step{text-align:left;display:flex;gap:14px;padding:0}
  .step-num{margin:2px 0 0;flex:0 0 auto}
  .step + .step{margin-top:20px}
}

/* ===================== FAQ ===================== */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-list{margin-top:28px}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);
  overflow:hidden;transition:box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.faq-item + .faq-item{margin-top:12px}
.faq-item.is-open{border-color:var(--c-primary-line);box-shadow:var(--sh-1)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;text-align:left;
  font-size:16px;font-weight:500;color:var(--c-ink);background:none;
}
.faq-q:hover{color:var(--c-primary)}
.faq-q .faq-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;color:var(--c-primary);
}
.faq-q .faq-icon::before,.faq-q .faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.faq-q .faq-icon::before{width:14px;height:1.6px}
.faq-q .faq-icon::after{width:1.6px;height:14px}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);background:var(--c-primary-soft);border-top:1px solid var(--c-line-2)}
.faq-a-inner{padding:20px;font-size:15px;line-height:1.8;color:var(--c-ink-2)}

/* ===================== CTA 条 ===================== */
.cta-band{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  background:var(--c-primary-soft);border:1px solid var(--c-primary-line);
  border-radius:var(--r-card);padding:36px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-3.png);
  background-size:cover;background-position:center;opacity:.10;pointer-events:none;
}
.cta-copy{position:relative;z-index:1;max-width:640px}
.cta-copy h2{font-size:26px;margin-bottom:10px}
.cta-copy p{font-size:15px;color:var(--c-ink-2)}
.cta-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.cta-tags li{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--c-primary-line);color:var(--c-primary);font-size:12.5px;
}
.cta-action{position:relative;z-index:1;display:flex;flex-direction:column;align-items:flex-start;gap:12px}
@media (max-width:639px){
  .cta-band{padding:24px}
  .cta-copy h2{font-size:22px}
  .cta-action{width:100%}
  .cta-action .btn{width:100%}
}

/* ===================== 回到顶部 ===================== */
.back-top{
  position:fixed;right:24px;bottom:24px;z-index:50;
  width:56px;height:56px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--c-line);box-shadow:var(--sh-3);color:var(--c-primary);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:none}
.back-top:hover{border-color:var(--c-primary)}
@media (max-width:639px){.back-top{right:16px;bottom:16px;width:48px;height:48px}}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--c-deep);color:#fff;padding-top:64px;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:40px}
.footer-col h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col ul a:hover{color:#fff;text-decoration:underline}
.footer-brand .brand{margin-bottom:14px}
.footer-brand .brand-text{color:#fff}
.footer-note{font-size:13px;line-height:1.85;color:rgba(255,255,255,.62);max-width:360px}
.footer-contact li{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:rgba(255,255,255,.72)}
.footer-contact li span:first-child{color:rgba(255,255,255,.52)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0 32px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.58)}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:639px){
  .site-footer{padding-top:44px}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding-bottom:28px}
  .footer-bottom{flex-direction:column;gap:8px}
}