/* roulang page: index */
:root{
  --primary:#125C7A;
  --primary-deep:#0C4459;
  --primary-tint:#E7F1F5;
  --accent:#D97A2B;
  --base:#F6F8FA;
  --surface:#FFFFFF;
  --line:#E3E9EF;
  --line-strong:#CDD8E1;
  --text:#1B2A33;
  --muted:#5C6E7A;
  --faint:#8C9AA4;
  --ok:#2E7D57;
  --warn:#C98A16;
  --err:#C0472F;
  --r-card:14px;
  --r-img:12px;
  --r-block:18px;
  --r-btn:10px;
  --r-tag:6px;
  --sh-card:0 1px 2px rgba(12,68,89,.05),0 10px 28px -14px rgba(12,68,89,.18);
  --sh-hover:0 2px 4px rgba(12,68,89,.06),0 18px 40px -16px rgba(12,68,89,.26);
  --sh-float:0 24px 60px -28px rgba(12,68,89,.30);
  --font-sans:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;height:auto;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 通用按钮与链接 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1.2;
  border-radius:var(--r-btn);padding:12px 24px;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(12,68,89,.65)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:#fff;border-color:var(--line-strong);color:var(--primary)}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-tint);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:8px 18px;font-size:14px}
.btn-block{width:100%}
.link{color:var(--primary);border-bottom:1px solid currentColor;padding-bottom:1px;transition:color .18s ease-out,border-color .18s ease-out}
.link:hover{color:var(--accent);border-bottom-width:2px}
.badge{display:inline-flex;align-items:center;font-size:12px;letter-spacing:.06em;line-height:1.4;color:var(--primary);background:var(--primary-tint);border-radius:var(--r-tag);padding:4px 10px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--primary-deep);color:rgba(255,255,255,.82);font-size:12px;letter-spacing:.04em;height:36px}
.topbar-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-text{display:flex;align-items:center;gap:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:none}
.topbar-right{display:flex;align-items:center;gap:16px;white-space:nowrap}
.topbar-domain{color:rgba(255,255,255,.6);font-family:var(--font-mono);font-size:12px;letter-spacing:0}
.topbar-btn{height:26px;padding:0 12px;display:inline-flex;align-items:center;border:1px solid rgba(255,255,255,.4);border-radius:var(--r-tag);color:#fff;font-size:12px;letter-spacing:.04em;transition:background-color .18s ease-out,border-color .18s ease-out}
.topbar-btn:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.72)}

/* ---------- 主导航 ---------- */
.nav{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease-out}
.nav.is-scrolled{box-shadow:0 8px 22px -16px rgba(12,68,89,.5)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--primary-deep);letter-spacing:-.01em;white-space:nowrap}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:700;letter-spacing:.02em;font-family:var(--font-mono)}
.nav-menu{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{position:relative;display:inline-block;padding:22px 0;font-size:15px;font-weight:500;color:var(--text);transition:color .18s ease-out}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .18s ease-out}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--primary)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;width:44px;height:44px;margin-left:auto;border:1px solid var(--line-strong);border-radius:var(--r-btn);background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;transition:border-color .18s ease-out,background-color .18s ease-out}
.nav-toggle:hover{border-color:var(--primary);background:var(--primary-tint)}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--primary)}

/* ---------- 移动抽屉 ---------- */
.nav-drawer{position:fixed;inset:0;z-index:90;background:#fff;display:flex;flex-direction:column;padding:14px 18px 20px;transform:translateX(102%);transition:transform .28s ease-out;overflow-y:auto}
.nav-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:6px 0 14px;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;border:1px solid var(--line-strong);border-radius:var(--r-btn);display:grid;place-items:center;font-size:20px;color:var(--primary);line-height:1}
.drawer-close:hover{background:var(--primary-tint);border-color:var(--primary)}
.drawer-list{margin-top:8px}
.drawer-link{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line);font-size:16px;font-weight:500;color:var(--text);transition:color .18s ease-out}
.drawer-link:hover,.drawer-link.is-active{color:var(--primary)}
.drawer-tip{margin-top:20px;font-size:13px;color:var(--muted);line-height:1.8}
.drawer-cta{margin-top:auto;padding-top:20px}

/* ---------- Hero ---------- */
.hero{position:relative;background:#fff;padding:72px 0 64px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(to right,rgba(18,92,122,.055) 1px,transparent 1px),linear-gradient(to bottom,rgba(18,92,122,.055) 1px,transparent 1px);
  background-size:48px 48px;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.06em;color:var(--primary);background:var(--primary-tint);border-radius:var(--r-tag);padding:5px 12px}
.hero h1{margin-top:20px;font-size:clamp(30px,4.2vw,52px);line-height:1.25;letter-spacing:-.01em;font-weight:700;color:var(--primary-deep)}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.8;color:var(--muted);max-width:560px}
.hero-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px}
.hero-trust{margin-top:28px;display:flex;flex-wrap:wrap;gap:26px}
.trust-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.trust-item i{width:16px;height:16px;border-radius:5px;background:var(--primary-tint);border:1px solid rgba(18,92,122,.25);display:inline-flex;align-items:center;justify-content:center;flex:none}
.trust-item i::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--primary)}
.hero-visual{position:relative;min-height:440px;border-radius:var(--r-block);overflow:hidden;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;box-shadow:var(--sh-card)}
.hero-visual::before{content:"";position:absolute;inset:0;background:linear-gradient(165deg,rgba(255,255,255,.80) 0%,rgba(231,241,245,.93) 100%)}
.hero-cards{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:32px;height:100%;align-content:center}
.mini-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:18px 20px;box-shadow:var(--sh-card);transition:transform .18s ease-out,box-shadow .18s ease-out}
.mini-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.mini-card strong{display:block;font-size:24px;font-weight:700;letter-spacing:-.02em;color:var(--primary);font-variant-numeric:tabular-nums;line-height:1.3}
.mini-card span{display:block;margin-top:4px;font-size:13px;color:var(--muted);letter-spacing:.02em}

/* ---------- 指标看板 ---------- */
.metrics{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.metrics-inner{display:grid;grid-template-columns:repeat(4,1fr)}
.metric{padding:32px 26px;border-left:1px solid var(--line)}
.metric:first-child{border-left:0}
.metric-value{font-size:clamp(28px,3vw,40px);font-weight:700;letter-spacing:-.02em;color:var(--primary);font-variant-numeric:tabular-nums;font-family:var(--font-mono);line-height:1.2}
.metric-unit{font-size:14px;font-family:var(--font-sans);color:var(--muted);margin-left:4px;letter-spacing:0}
.metric-label{margin-top:6px;font-size:13px;color:var(--muted)}

/* ---------- 板块骨架 ---------- */
.section{padding:96px 0}
.section-tint{background:#fff}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700;color:var(--primary-deep);letter-spacing:-.01em}
.section-desc{margin-top:10px;font-size:14px;color:var(--muted);max-width:620px}
.section-head .link{font-size:14px;white-space:nowrap}

/* ---------- 服务矩阵 ---------- */
.services-mix{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-auto-rows:minmax(162px,auto);gap:24px}
.service-feature{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column;background:#fff;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);transition:transform .2s ease-out,box-shadow .2s ease-out}
.service-feature:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.service-thumb{position:relative;height:168px;overflow:hidden;flex:none}
.service-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease-out}
.service-feature:hover .service-thumb img{transform:scale(1.04)}
.service-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,68,89,0) 40%,rgba(12,68,89,.45) 100%)}
.service-body{padding:24px 26px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.service-index{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--primary);font-family:var(--font-mono)}
.service-feature h3{font-size:20px;line-height:1.4;font-weight:700;color:var(--text)}
.service-feature p{font-size:14px;color:var(--muted);line-height:1.8}
.service-feature .link{margin-top:auto;align-self:flex-start;font-size:14px}
.service-item{display:flex;flex-direction:column;gap:8px;padding:22px;background:var(--primary-tint);border:1px solid transparent;border-radius:var(--r-card);transition:background-color .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out}
.service-item:hover{background:#fff;border-color:var(--primary);box-shadow:var(--sh-card);transform:translateY(-2px)}
.service-item h3{font-size:17px;line-height:1.45;font-weight:600;color:var(--text)}
.service-item p{font-size:13px;line-height:1.75;color:var(--muted)}
.service-arrow{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--primary);font-weight:500}
.service-arrow::after{content:"";width:14px;height:1px;background:var(--primary);transition:width .2s ease-out}
.service-item:hover .service-arrow::after{width:22px}

/* ---------- 结果对比 ---------- */
.compare{background:#fff;border:1px solid var(--line);border-radius:var(--r-block);padding:12px 32px 24px;box-shadow:var(--sh-card)}
.compare-head{display:grid;grid-template-columns:170px 1fr 1fr;gap:20px;padding:20px 0 14px;font-size:13px;color:var(--faint);letter-spacing:.04em}
.compare-row{display:grid;grid-template-columns:170px 1fr 1fr;gap:20px;align-items:center;padding:18px 0;border-top:1px solid var(--line)}
.compare-dim{font-size:13px;color:var(--muted);letter-spacing:.02em}
.compare-cell{display:flex;align-items:center;gap:12px}
.compare-bar{position:relative;flex:1;height:12px;border-radius:999px;background:#EEF2F5;overflow:hidden}
.compare-bar span{display:block;height:100%;border-radius:999px;width:0;transition:width .9s cubic-bezier(.22,.8,.28,1)}
.compare-bar.is-baseline span{background:#C3D0D8}
.compare-bar.is-target span{background:var(--primary)}
.compare.is-in .compare-bar span{width:var(--w)}
.compare-val{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;min-width:62px;font-family:var(--font-mono)}
.compare-note{margin-top:16px;font-size:12px;color:var(--faint);line-height:1.7}

/* ---------- 资讯列表 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.news-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:var(--line-strong)}
.news-cover{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--primary-tint)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease-out}
.news-card:hover .news-cover img{transform:scale(1.05)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-tag{align-self:flex-start}
.news-title{font-size:17px;line-height:1.55;font-weight:600;color:var(--text);transition:color .18s ease-out;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover .news-title{color:var(--primary)}
.news-excerpt{font-size:14px;line-height:1.8;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--faint)}
.news-meta .link{font-size:13px;border-bottom-color:transparent}
.news-meta .link:hover{border-bottom-color:currentColor}
.news-empty{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:64px 24px;background:#fff;border:1px dashed var(--line-strong);border-radius:var(--r-card);text-align:center}
.empty-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-tint);display:grid;place-items:center;color:var(--primary)}
.empty-icon::before{content:"";width:20px;height:20px;border:2px solid currentColor;border-radius:4px;opacity:.75}
.empty-text{font-size:15px;color:var(--muted)}

/* ---------- 反馈摘录 ---------- */
.feedback-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.feedback-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:28px 26px 24px;transition:transform .2s ease-out,box-shadow .2s ease-out}
.feedback-card::before{content:"“";position:absolute;top:10px;right:22px;font-size:56px;line-height:1;color:var(--primary-tint);font-family:Georgia,serif}
.feedback-card:hover{transform:translateY(-2px);box-shadow:var(--sh-card)}
.feedback-text{position:relative;font-size:15px;line-height:1.85;color:var(--text)}
.feedback-from{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px;font-size:13px;color:var(--faint)}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;transition:border-color .18s ease-out,box-shadow .18s ease-out}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item[open]{border-color:var(--primary);box-shadow:var(--sh-card)}
.faq-q{list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 22px;font-size:16px;font-weight:500;line-height:1.6;color:var(--text);transition:color .18s ease-out}
.faq-q::-webkit-details-marker{display:none}
.faq-q:hover{color:var(--primary)}
.faq-icon{position:relative;width:18px;height:18px;flex:none;margin-top:4px;transition:transform .2s ease-out}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:background-color .2s ease-out}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-a{margin:0 22px 18px;padding-top:16px;border-top:1px solid var(--line);font-size:15px;line-height:1.85;color:var(--muted)}

/* ---------- 转化表单 ---------- */
.lead-block{display:grid;grid-template-columns:5fr 7fr;background:#fff;border:1px solid var(--line);border-radius:var(--r-block);overflow:hidden;box-shadow:var(--sh-float)}
.lead-intro{background:var(--primary-deep);color:#fff;padding:44px 40px;display:flex;flex-direction:column;gap:18px}
.lead-intro h2{font-size:26px;line-height:1.35;font-weight:700;color:#fff}
.lead-intro p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.75)}
.lead-list{display:flex;flex-direction:column;gap:12px;margin-top:4px}
.lead-list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;line-height:1.7;color:rgba(255,255,255,.86)}
.lead-list li::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent);flex:none;margin-top:9px}
.lead-contact{margin-top:auto;padding-top:20px;border-top:1px solid rgba(255,255,255,.16);font-size:13px;color:rgba(255,255,255,.7);line-height:1.9}
.lead-form{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding:36px 40px}
.field{display:flex;flex-direction:column}
.field-full{grid-column:1/-1}
.field-label{font-size:13px;color:var(--muted);margin-bottom:8px;letter-spacing:.02em}
.field-input,.field-select,.field-textarea{width:100%;height:46px;padding:0 14px;font-size:15px;color:var(--text);background:#fff;border:1px solid var(--line-strong);border-radius:var(--r-btn);transition:border-color .18s ease-out,box-shadow .18s ease-out;appearance:none}
.field-select{background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;padding-right:40px}
.field-textarea{height:auto;min-height:112px;padding:12px 14px;line-height:1.7;resize:vertical}
.field-input:hover,.field-select:hover,.field-textarea:hover{border-color:var(--faint)}
.field-input:focus,.field-select:focus,.field-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(18,92,122,.12)}
.field-error{display:none;margin-top:6px;font-size:12px;color:var(--err)}
.field.is-invalid .field-input,.field.is-invalid .field-select,.field.is-invalid .field-textarea{border-color:var(--err);box-shadow:0 0 0 3px rgba(192,71,47,.1)}
.field.is-invalid .field-error{display:block}
.form-check{display:flex;align-items:flex-start;gap:10px;font-size:13px;line-height:1.7;color:var(--muted)}
.form-check input{margin-top:5px;width:16px;height:16px;accent-color:var(--primary);flex:none}
.form-tip{grid-column:1/-1;font-size:13px;color:var(--err);min-height:20px}
.form-tip.is-ok{color:var(--ok)}

/* ---------- 页脚 ---------- */
.footer{background:var(--primary-deep);color:rgba(255,255,255,.72);margin-top:0}
.footer-main{max-width:1200px;margin:0 auto;padding:64px 24px 40px;display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;flex-direction:column;gap:14px;padding-right:20px}
.footer-brand .brand{color:#fff;font-size:20px}
.footer-brand .brand-mark{background:var(--accent)}
.footer-note{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:320px}
.footer-col{border-left:1px solid rgba(255,255,255,.14);padding-left:32px}
.footer-col h4{margin:0 0 16px;font-size:14px;font-weight:700;color:#fff;letter-spacing:.02em}
.footer-col a,.footer-col span{display:block;font-size:14px;line-height:1.6;padding:6px 0;color:rgba(255,255,255,.72);transition:color .18s ease-out,transform .18s ease-out}
.footer-col a:hover{color:var(--accent);transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12)}
.footer-bottom-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:52px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:12px;color:rgba(255,255,255,.55)}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a:hover{color:var(--accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero-grid{gap:36px}
  .services-mix{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero{padding:56px 0 48px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-visual{min-height:320px}
  .hero-cards{padding:24px}
  .services-mix{grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:auto}
  .service-feature{grid-column:span 2;grid-row:auto}
  .service-item{grid-column:span 1}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feedback-grid{grid-template-columns:1fr}
  .compare{padding:8px 24px 20px}
  .compare-head,.compare-row{grid-template-columns:130px 1fr 1fr;gap:14px}
  .lead-block{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr 1fr;gap:28px}
  .footer-col{border-left:0;padding-left:0}
  .footer-brand{padding-right:0;grid-column:1/-1}
}
@media (max-width:900px){
  .nav-menu,.nav-cta{display:none}
  .nav-toggle{display:flex}
}
@media (max-width:767px){
  .topbar{display:none}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .metrics-inner{grid-template-columns:repeat(2,1fr)}
  .metric{padding:24px 18px;border-left:1px solid var(--line);border-top:1px solid var(--line)}
  .metric:nth-child(-n+2){border-top:0}
  .metric:nth-child(odd){border-left:0}
  .news-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .services-mix{grid-template-columns:1fr}
  .service-feature{grid-column:span 1}
  .service-item{flex-direction:row;align-items:center;gap:14px;padding:18px}
  .service-item .service-index{flex:none}
  .service-item h3{font-size:16px}
  .service-item p{display:none}
  .service-arrow{margin-top:0;margin-left:auto}
  .compare{padding:6px 18px 18px}
  .compare-head{display:none}
  .compare-row{grid-template-columns:1fr;gap:10px;padding:16px 0}
  .compare-dim{font-size:13px;font-weight:600;color:var(--text)}
  .lead-form{grid-template-columns:1fr;padding:24px}
  .lead-intro{padding:30px 24px}
  .footer-main{padding:48px 20px 32px}
  .footer-bottom-inner{height:auto;padding:16px 20px;flex-direction:column;align-items:flex-start}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .hero{padding:44px 0 40px}
  .hero-cards{grid-template-columns:1fr 1fr;gap:10px;padding:16px}
  .mini-card{padding:14px}
  .mini-card strong{font-size:20px}
  .metric-value{font-size:28px}
  .footer-main{grid-template-columns:1fr}
  .btn{padding:11px 20px;font-size:14px}
  .hero-actions .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --primary:#125C7A;
  --primary-deep:#0C4459;
  --primary-soft:#1B7EA3;
  --tint:#E7F1F5;
  --accent:#D97A2B;
  --base:#F6F8FA;
  --surface:#FFFFFF;
  --line:#E3E9EF;
  --line-strong:#CDD8E1;
  --text:#1B2A33;
  --muted:#5C6E7A;
  --faint:#8C9AA4;
  --success:#2E7D57;
  --warning:#C98A16;
  --danger:#C0472F;
  --radius-card:14px;
  --radius-img:12px;
  --radius-block:18px;
  --radius-btn:10px;
  --radius-chip:6px;
  --shadow-card:0 1px 2px rgba(12,68,89,.05),0 10px 28px -14px rgba(12,68,89,.18);
  --shadow-hover:0 2px 4px rgba(12,68,89,.06),0 18px 40px -16px rgba(12,68,89,.26);
  --shadow-float:0 24px 60px -28px rgba(12,68,89,.30);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;object-fit:cover}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-deep)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);line-height:1.3}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.1em;padding-left:1.15em}
li{margin-bottom:.45em}
:focus-visible{outline:3px solid rgba(18,92,122,.35);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:40px;max-width:760px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);letter-spacing:-.01em}
.section-head p{margin:12px 0 0;color:var(--muted);font-size:15px}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--primary);font-weight:500;margin-bottom:14px;
  background:var(--tint);border-radius:var(--radius-chip);padding:5px 12px;
}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--primary-deep);color:#D6E6EE;font-size:12px;letter-spacing:.04em;border-bottom:1px solid rgba(255,255,255,.08)}
.topbar-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:14px}
.topbar-domain{color:#9FC2D2;font-family:var(--mono);letter-spacing:.02em}
.topbar-cta{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--radius-chip);
  border:1px solid rgba(214,230,238,.45);color:#EAF4F8;font-size:12px;transition:all .18s var(--ease)
}
.topbar-cta:hover{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.7)}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(8px)}
.site-header.is-scrolled{border-bottom:1px solid var(--line);box-shadow:0 6px 22px -18px rgba(12,68,89,.55)}
.nav{max-width:1200px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--text);letter-spacing:-.01em}
.brand:hover{color:var(--primary-deep)}
.brand-mark{
  width:32px;height:32px;border-radius:9px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;letter-spacing:.04em
}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--text);padding:24px 0;transition:color .18s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;bottom:14px;height:2px;width:0;background:var(--primary);transition:width .18s var(--ease)}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--primary)}
.nav-link.is-active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-strong);background:var(--surface);
  border-radius:var(--radius-btn);align-items:center;justify-content:center;cursor:pointer;transition:all .18s var(--ease)
}
.nav-toggle:hover{border-color:var(--primary);background:var(--tint)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--primary-deep);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--primary-deep)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-drawer{
  display:none;position:fixed;inset:104px 0 0 0;background:#fff;z-index:55;
  flex-direction:column;padding:8px 20px 96px;overflow-y:auto
}
.nav-drawer.is-open{display:flex}
.nav-drawer a.d-link{display:flex;align-items:center;height:56px;border-bottom:1px solid var(--line);font-size:16px;font-weight:500;color:var(--text)}
.nav-drawer a.d-link.is-active{color:var(--primary)}
.drawer-foot{margin-top:auto;padding-top:20px;position:sticky;bottom:0;background:#fff}

/* ---------- 按钮 ---------- */
.btn-primary,.btn-ghost,.link{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;border-radius:var(--radius-btn);
  transition:all .18s var(--ease);cursor:pointer;text-decoration:none
}
.btn-primary{background:var(--primary);color:#fff;border:1px solid var(--primary);padding:12px 24px;height:44px}
.btn-primary:hover{background:var(--primary-deep);border-color:var(--primary-deep);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px -14px rgba(12,68,89,.6)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:var(--surface);color:var(--primary);border:1px solid var(--line-strong);padding:12px 24px;height:44px}
.btn-ghost:hover{border-color:var(--primary);background:var(--tint);color:var(--primary-deep)}
.btn-ghost:active{transform:translateY(0)}
.link{color:var(--primary);border-bottom:1px solid var(--primary);border-radius:0;padding:0;height:auto;background:none}
.link:hover{border-bottom-width:2px;border-color:var(--accent);color:var(--accent)}
.btn-sm{height:38px;padding:9px 18px;font-size:14px}

/* ---------- 面包屑 ---------- */
.breadcrumb{background:var(--surface);border-bottom:1px solid var(--line)}
.breadcrumb-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:52px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--text);font-weight:500}

/* ---------- 分类 Hero（压缩版 + 影像遮罩） ---------- */
.cat-hero{
  position:relative;min-height:340px;display:flex;align-items:center;color:#fff;
  background-image:linear-gradient(100deg,rgba(9,44,58,.92) 0%,rgba(12,68,89,.78) 46%,rgba(12,68,89,.32) 100%),
    url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;overflow:hidden
}
.cat-hero::after{content:"";position:absolute;inset:auto 0 0 0;height:120px;background:linear-gradient(180deg,rgba(9,44,58,0),rgba(9,44,58,.55))}
.cat-hero-inner{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:64px 24px;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;width:100%}
.cat-hero h1{font-size:clamp(28px,3.6vw,44px);line-height:1.24;letter-spacing:-.01em;color:#fff}
.cat-hero .cat-hero-sub{margin:16px 0 0;font-size:16px;color:#CFE3EC;max-width:620px}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.cat-hero .btn-primary{background:#fff;color:var(--primary-deep);border-color:#fff}
.cat-hero .btn-primary:hover{background:var(--tint);border-color:var(--tint);color:var(--primary-deep)}
.cat-hero .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.cat-hero .btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff;color:#fff}
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.hero-stat{
  background:rgba(255,255,255,.94);border-radius:var(--radius-card);padding:18px 20px;
  box-shadow:var(--shadow-float);color:var(--text)
}
.hero-stat b{display:block;font-family:var(--mono);font-size:26px;font-weight:700;color:var(--primary);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums}
.hero-stat span{display:block;margin-top:4px;font-size:13px;color:var(--muted)}

/* ---------- 两栏主内容 ---------- */
.layout{display:grid;grid-template-columns:8fr 4fr;gap:48px;align-items:start}
.prose{max-width:760px}
.prose h2{font-size:clamp(21px,2.1vw,26px);margin:52px 0 16px;padding-left:14px;border-left:5px solid var(--primary);line-height:1.42}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:18px;margin:30px 0 12px}
.prose p{color:#243642}
.prose ul{list-style:none;padding-left:0}
.prose ul li{position:relative;padding-left:22px}
.prose ul li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;background:var(--primary);border-radius:2px}
.callout{
  background:var(--tint);border-left:3px solid var(--primary);border-radius:0 var(--radius-card) var(--radius-card) 0;
  padding:18px 22px;font-size:15px;color:#20404F;margin:24px 0
}
.callout strong{color:var(--primary-deep)}
.figure{margin:28px 0}
.figure img{border-radius:var(--radius-img);width:100%;border:1px solid var(--line)}
.figure figcaption{margin-top:10px;font-size:12px;color:var(--faint);text-align:center}

/* 右侧目录 */
.aside{position:sticky;top:100px;display:flex;flex-direction:column;gap:20px}
.aside-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-card)}
.aside-card h3{font-size:15px;margin-bottom:14px;letter-spacing:.02em}
.toc-list{list-style:none;margin:0;padding:0}
.toc-list li{margin:0;border-bottom:1px solid var(--line)}
.toc-list li:last-child{border-bottom:0}
.toc-list a{display:block;padding:11px 0 11px 16px;font-size:14px;color:var(--muted);position:relative;transition:all .18s var(--ease)}
.toc-list a::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:0;background:var(--accent);transition:height .18s var(--ease)}
.toc-list a:hover{color:var(--primary);padding-left:20px}
.toc-list a:hover::before{height:18px}
.aside-note{font-size:13px;color:var(--muted);line-height:1.75}
.aside-stat{display:flex;align-items:baseline;gap:8px;margin-top:14px}
.aside-stat b{font-family:var(--mono);font-size:28px;color:var(--primary);font-variant-numeric:tabular-nums}
.aside-stat span{font-size:13px;color:var(--muted)}

/* ---------- 功能矩阵 ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.mcard{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px;min-height:150px;display:flex;flex-direction:column;gap:8px;
  transition:all .18s var(--ease)
}
.mcard:hover{border-color:var(--primary);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.mcard .idx{font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--primary);font-weight:700}
.mcard h3{font-size:17px}
.mcard p{margin:0;font-size:14px;color:var(--muted);line-height:1.72}
.mcard .arrow{margin-top:auto;font-size:13px;color:var(--primary);font-weight:500}

/* ---------- 能力对照 ---------- */
.compare{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-block);padding:8px 28px;box-shadow:var(--shadow-card)}
.compare-row{display:grid;grid-template-columns:170px 1fr;gap:20px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}
.compare-row:last-child{border-bottom:0}
.compare-dim{font-size:13px;color:var(--muted);letter-spacing:.02em}
.compare-bars{display:flex;flex-direction:column;gap:10px}
.compare-bar{position:relative;height:12px;border-radius:6px;background:#EEF2F5;overflow:hidden}
.compare-bar i{position:absolute;inset:0 auto 0 0;display:block;border-radius:6px}
.compare-bar.is-baseline i{background:#C3CCD3}
.compare-bar.is-target i{background:var(--primary)}
.compare-bar.is-accent i{background:var(--accent)}
.compare-value{font-size:12px;color:var(--faint);font-family:var(--mono);margin-left:10px}
.bar-line{display:flex;align-items:center}
.compare-note{margin:0;padding:0 0 20px;font-size:12px;color:var(--faint)}

/* ---------- 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--radius-chip);
  background:var(--tint);color:var(--primary);font-size:12px;letter-spacing:.06em;font-weight:500
}
.badge-accent{background:#FBEEE2;color:#A95D1C}

/* ---------- 维护时间线 ---------- */
.timeline{list-style:none;margin:0;padding:0;border-left:1px solid var(--line-strong)}
.timeline li{position:relative;padding:0 0 26px 26px;margin:0}
.timeline li::before{content:"";position:absolute;left:-5px;top:9px;width:9px;height:9px;border-radius:50%;background:var(--surface);border:2px solid var(--primary)}
.timeline time{display:block;font-family:var(--mono);font-size:12px;color:var(--faint);letter-spacing:.04em}
.timeline strong{display:block;margin-top:4px;font-size:16px}
.timeline p{margin:6px 0 0;font-size:14px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;align-items:start}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-img);padding:0 22px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)}
.faq-item[open]{border-color:var(--line-strong);box-shadow:var(--shadow-card)}
.faq-q{list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 0;font-size:16px;font-weight:500}
.faq-q::-webkit-details-marker{display:none}
.faq-icon{flex:0 0 auto;width:20px;height:20px;position:relative;transition:transform .2s var(--ease);margin-top:3px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-a{padding:0 0 18px;border-top:1px solid var(--line);font-size:15px;line-height:1.85;color:var(--muted)}
.faq-a p{margin:14px 0 0}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--tint);border-radius:var(--radius-block);padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(21px,2.2vw,28px)}
.cta-band p{margin:10px 0 0;font-size:15px;color:var(--muted);max-width:620px}
.cta-band-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.footer{background:#0A2E3C;color:#B9CDD6;margin-top:0}
.footer-main{max-width:1200px;margin:0 auto;padding:64px 24px 48px;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand .brand{color:#fff;font-size:20px}
.footer-brand .brand:hover{color:#fff}
.footer-note{margin:16px 0 0;font-size:14px;line-height:1.8;color:#8FAEBE;max-width:320px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.04em}
.footer-col a,.footer-col span{display:block;font-size:14px;color:#A9C3CF;padding:6px 0;transition:all .18s var(--ease)}
.footer-col a:hover{color:#F0C79B;transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);height:52px;display:flex;align-items:center}
.footer-bottom-inner{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:12px;color:#7F9CAB}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{color:#7F9CAB}
.footer-links a:hover{color:#F0C79B}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .grid-4{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .cat-hero-inner{grid-template-columns:1fr;gap:32px}
  .layout{grid-template-columns:1fr;gap:32px}
  .aside{position:static}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-main{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:900px){
  .nav-menu{display:none}
  .nav-toggle{display:inline-flex}
  .nav-actions .btn-primary{display:none}
  .topbar{display:none}
  .nav-drawer{inset:68px 0 0 0}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .container{padding:0 18px}
  .nav,.breadcrumb-inner,.topbar-inner,.footer-main,.footer-bottom-inner{padding-left:18px;padding-right:18px}
  .grid-4,.grid-3,.grid-2,.faq-grid{grid-template-columns:1fr}
  .compare-row{grid-template-columns:1fr;gap:10px}
  .compare{padding:8px 18px}
  .cta-band{padding:28px 22px}
  .footer-main{grid-template-columns:1fr 1fr;padding:48px 18px 36px}
  .footer-bottom{height:auto;padding:16px 0}
  .footer-bottom-inner{flex-direction:column;align-items:flex-start;gap:10px}
  .cat-hero-inner{padding:48px 18px}
  .hero-stats{grid-template-columns:1fr 1fr}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .nav,.breadcrumb-inner,.footer-main,.footer-bottom-inner{padding-left:16px;padding-right:16px}
  .footer-main{grid-template-columns:1fr;gap:24px}
  .hero-stat b{font-size:22px}
  .prose h2{font-size:20px}
}

/* roulang page: article */
:root{
  --primary:#125C7A;
  --primary-deep:#0C4459;
  --primary-dark:#0B3A4B;
  --tint:#E7F1F5;
  --tint-strong:#D3E5ED;
  --accent:#D97A2B;
  --accent-soft:#E49A54;
  --base:#F6F8FA;
  --surface:#FFFFFF;
  --line:#E3E9EF;
  --line-strong:#CDD8E1;
  --text:#1B2A33;
  --muted:#5C6E7A;
  --faint:#8C9AA4;
  --ok:#2E7D57;
  --warn:#C98A16;
  --err:#C0472F;
  --r-card:14px;
  --r-img:12px;
  --r-block:18px;
  --r-btn:10px;
  --r-badge:6px;
  --shadow:0 1px 2px rgba(12,68,89,.05), 0 10px 28px -14px rgba(12,68,89,.18);
  --shadow-hover:0 2px 4px rgba(12,68,89,.06), 0 18px 40px -16px rgba(12,68,89,.26);
  --shadow-float:0 24px 60px -28px rgba(12,68,89,.30);
  --ease:cubic-bezier(.22,.61,.36,1);
  --content-max:760px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block;object-fit:cover}
a{color:var(--primary);text-decoration:none;transition:color .18s var(--ease)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35;color:var(--text);letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0}
::selection{background:rgba(18,92,122,.16)}

/* ---------- 容器 ---------- */
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.section{padding:96px 0}
.section-head{margin-bottom:40px;max-width:760px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3}
.section-head p{margin-top:12px;font-size:15px;color:var(--muted);line-height:1.8}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--primary-deep);color:#CFE2EA;font-size:12px;letter-spacing:.04em;border-bottom:1px solid rgba(255,255,255,.12)}
.topbar-inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-left{display:flex;align-items:center;gap:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:var(--accent-soft);display:inline-block;flex:0 0 auto}
.topbar-right{display:flex;align-items:center;gap:14px;white-space:nowrap}
.topbar-domain{color:#8FB3C1;font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;letter-spacing:.02em}
.btn-mini{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:6px;
  border:1px solid rgba(255,255,255,.42);color:#E7F1F5;font-size:12px;letter-spacing:.04em;
  background:transparent;transition:background .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn-mini:hover{background:rgba(255,255,255,.14);border-color:#fff;color:#fff;transform:translateY(-1px)}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:var(--surface);border-bottom:1px solid transparent;transition:box-shadow .2s var(--ease),border-color .2s var(--ease)}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 8px 24px -18px rgba(12,68,89,.45)}
.nav-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--text);letter-spacing:-.01em;flex:0 0 auto}
.brand:hover{color:var(--primary)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;
  display:grid;place-items:center;font-size:12px;font-weight:700;letter-spacing:.06em;flex:0 0 auto;
}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--text);padding:6px 0;white-space:nowrap}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  background:var(--surface);cursor:pointer;align-items:center;justify-content:center;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--primary);background:var(--tint)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

.read-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:transparent;overflow:hidden}
.read-progress span{display:block;height:100%;width:0;background:var(--primary);transition:width .1s linear}

/* ---------- 移动抽屉 ---------- */
.nav-drawer{
  position:fixed;inset:0;z-index:90;background:var(--surface);
  transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  display:flex;flex-direction:column;
}
.nav-drawer.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.drawer-head{height:68px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line-strong);background:var(--surface);cursor:pointer;font-size:18px;line-height:1;color:var(--muted)}
.drawer-close:hover{border-color:var(--primary);color:var(--primary)}
.drawer-body{flex:1;overflow-y:auto;padding:8px 18px}
.drawer-link{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--line);font-size:16px;font-weight:500;color:var(--text)}
.drawer-link:hover,.drawer-link.is-active{color:var(--primary)}
.drawer-tip{margin:18px 0 8px;font-size:13px;color:var(--muted);line-height:1.8}
.drawer-foot{padding:14px 18px 22px;border-top:1px solid var(--line)}

/* ---------- 按钮 ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);background:var(--primary);color:#fff;
  font-size:15px;font-weight:500;border:1px solid var(--primary);cursor:pointer;
  transition:background .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.btn-primary:hover{background:var(--primary-deep);border-color:var(--primary-deep);transform:translateY(-1px);box-shadow:0 12px 24px -14px rgba(12,68,89,.6)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-primary:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(18,92,122,.2)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);background:var(--surface);color:var(--primary);
  font-size:15px;font-weight:500;border:1px solid var(--line-strong);cursor:pointer;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.btn-ghost:hover{background:var(--tint);border-color:var(--primary);color:var(--primary-deep);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-ghost:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(18,92,122,.2)}
.btn-sm{padding:9px 18px;font-size:14px}
.link{color:var(--primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;transition:text-decoration-thickness .18s var(--ease),color .18s var(--ease)}
.link:hover{color:var(--accent);text-decoration-thickness:2px}

/* ---------- 面包屑 ---------- */
.breadcrumb-bar{background:#EEF3F6;border-bottom:1px solid var(--line)}
.breadcrumb{height:52px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);overflow:hidden}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.crumb-sep{color:var(--faint)}
.crumb-current{color:#2C4553;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:56ch}

/* ---------- 文章封面头 ---------- */
.article-hero{position:relative;overflow:hidden;background:var(--primary-deep)}
.article-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.5;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(9,42,55,.94) 0%,rgba(9,42,55,.84) 42%,rgba(9,42,55,.48) 100%);
}
.article-hero-inner{position:relative;z-index:2;padding:60px 24px 56px}
.hero-badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-badge);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.3);color:#E7F1F5;
  font-size:12px;letter-spacing:.06em;font-weight:500;
}
.article-title{
  color:#fff;font-size:clamp(28px,3.8vw,44px);line-height:1.28;letter-spacing:-.01em;
  margin:18px 0 20px;max-width:900px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:rgba(255,255,255,.84)}
.article-meta .meta-sep{width:1px;height:12px;background:rgba(255,255,255,.36)}

/* ---------- 正文布局 ---------- */
.article-main{padding:56px 0 0}
.article-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:48px;align-items:start}
.article-content{min-width:0}

.article-body{font-size:16px;line-height:1.9;color:var(--text);max-width:var(--content-max)}
.article-body > * + *{margin-top:1.2em}
.article-body p{margin:0}
.article-body h2{
  position:relative;font-size:22px;line-height:1.4;margin:40px 0 0;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:6px;border-radius:3px;background:var(--primary);
}
.article-body h3{font-size:18px;line-height:1.5;margin:28px 0 0}
.article-body h4{font-size:17px;line-height:1.5;margin:22px 0 0}
.article-body ul,.article-body ol{padding-left:1.35em}
.article-body li{margin:.5em 0}
.article-body li::marker{color:var(--primary)}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--tint);border-left:3px solid var(--primary);
  border-radius:0 10px 10px 0;font-size:15px;line-height:1.85;color:#25404C;
}
.article-body blockquote p{margin:0}
.article-body img{border-radius:var(--r-img);margin:24px auto 12px}
.article-body a{color:var(--primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.article-body a:hover{color:var(--accent);text-decoration-thickness:2px}
.article-body table{
  width:100%;border-collapse:separate;border-spacing:0;font-size:15px;
  border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:24px 0;
}
.article-body th{background:var(--tint);text-align:left;font-weight:600;padding:12px 16px;color:#22404D}
.article-body td{padding:12px 16px;border-top:1px solid var(--line);color:var(--text)}
.article-body code{
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;font-size:14px;
  background:var(--tint);padding:2px 6px;border-radius:6px;color:#1D4B5E;
}
.article-body pre{
  background:#0C4459;color:#DCEAF1;padding:18px 20px;border-radius:var(--r-img);overflow-x:auto;
  font-family:ui-monospace,"SFMono-Regular",Consolas,monospace;font-size:14px;line-height:1.7;
}
.article-body pre code{background:transparent;color:inherit;padding:0}

.article-empty{
  border:1px dashed var(--line-strong);background:var(--surface);border-radius:var(--r-card);
  padding:48px 32px;text-align:center;
}
.article-empty .empty-icon{
  width:56px;height:56px;border-radius:16px;background:var(--tint);color:var(--primary);
  display:grid;place-items:center;margin:0 auto 18px;font-size:22px;font-weight:700;
}
.article-empty .empty-title{font-size:20px;font-weight:700;margin-bottom:10px}
.article-empty p{color:var(--muted);font-size:15px;max-width:520px;margin:0 auto 24px}

/* ---------- 侧栏 ---------- */
.article-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.aside-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:22px 22px 18px;box-shadow:var(--shadow)}
.aside-card h3{font-size:15px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.aside-card h3::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--primary)}
.toc{display:flex;flex-direction:column;max-height:340px;overflow-y:auto;padding-right:4px}
.toc-link{display:block;font-size:14px;line-height:1.6;color:var(--muted);padding:7px 0 7px 12px;border-left:2px solid var(--line);transition:color .18s var(--ease),border-color .18s var(--ease),padding-left .18s var(--ease)}
.toc-link:hover{color:var(--primary);border-left-color:var(--primary);padding-left:15px}
.toc-link.is-sub{padding-left:26px;font-size:13px}
.toc-link.is-current{color:var(--primary);border-left-color:var(--primary);font-weight:500}
.toc-empty{font-size:13px;color:var(--faint);display:none}

.aside-links{display:flex;flex-direction:column;gap:10px}
.aside-link{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px;color:var(--text);padding:10px 12px;border-radius:10px;background:var(--base);transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease)}
.aside-link:hover{background:var(--tint);color:var(--primary);transform:translateX(2px)}
.aside-link span.arrow{color:var(--faint);transition:color .18s var(--ease),transform .18s var(--ease)}
.aside-link:hover span.arrow{color:var(--primary);transform:translateX(2px)}

/* ---------- 上一篇 / 下一篇 ---------- */
.article-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:48px}
.nav-cell{
  display:flex;flex-direction:column;gap:6px;padding:18px 20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.nav-cell:hover{border-color:var(--primary);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.nav-cell.is-next{text-align:right;align-items:flex-end}
.nav-dir{font-size:15px;font-weight:500;color:var(--primary)}
.nav-desc{font-size:13px;color:var(--muted)}

/* ---------- 相关推荐 ---------- */
.relate-block{margin-top:56px}
.relate-block h2{font-size:20px;margin-bottom:20px}
.relate-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.relate-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
}
.relate-card:hover{border-color:var(--tint-strong);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.relate-cover{aspect-ratio:16/10;overflow:hidden;background:var(--tint)}
.relate-cover img{width:100%;height:100%;transition:transform .3s var(--ease)}
.relate-card:hover .relate-cover img{transform:scale(1.04)}
.relate-body{padding:16px 16px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.relate-card h3{font-size:16px;line-height:1.5}
.relate-card:hover h3{color:var(--primary)}
.relate-card p{font-size:13px;color:var(--muted);line-height:1.7;flex:1}
.relate-meta{font-size:12px;color:var(--faint);padding-top:10px;border-top:1px solid var(--line)}
.back-row{display:flex;justify-content:center;margin-top:40px}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--tint);border-top:1px solid var(--tint-strong);border-bottom:1px solid var(--tint-strong);margin-top:96px}
.cta-inner{padding:44px 24px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:22px;line-height:1.4}
.cta-inner p{margin-top:8px;font-size:14px;color:var(--muted);max-width:640px}

/* ---------- 页脚 ---------- */
.footer{background:var(--primary-dark);color:#C6D6DE;margin-top:0}
.footer-main{max-width:1200px;margin:0 auto;padding:64px 24px 48px;display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:0}
.footer-brand{padding-right:36px}
.footer-brand .brand{color:#fff;font-size:20px}
.footer-brand .brand:hover{color:#fff}
.footer-note{margin-top:16px;font-size:13px;line-height:1.85;color:#A9C0CB;max-width:36ch}
.footer-col{border-left:1px solid rgba(255,255,255,.10);padding:0 28px}
.footer-col:last-child{border-right:1px solid rgba(255,255,255,.10)}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-col a,.footer-col span{display:block;font-size:14px;color:#B9CBD4;margin-bottom:10px;transition:color .18s var(--ease),transform .18s var(--ease)}
.footer-col a:hover{color:var(--accent-soft);transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10)}
.footer-bottom-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;height:52px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:12px;color:#8FA9B5;
}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{color:#8FA9B5}
.footer-links a:hover{color:var(--accent-soft)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:100%}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .nav-toggle{display:flex}
  .nav-actions .btn-primary{display:none}
  .article-grid{grid-template-columns:minmax(0,1fr);gap:40px}
  .article-aside{position:static;top:auto}
  .article-hero-inner{padding:48px 24px 44px}
  .section{padding:72px 0}
  .relate-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-main{grid-template-columns:1fr 1fr;gap:36px 0;padding:48px 24px 36px}
  .footer-col{border-left:0;padding:0 24px 0 0}
  .footer-col:last-child{border-right:0}
  .footer-brand{padding-right:24px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .topbar{display:none}
  .nav-inner{height:60px}
  .brand{font-size:18px}
  .section{padding:56px 0}
  .article-main{padding:40px 0 0}
  .article-hero-inner{padding:36px 18px 32px}
  .article-title{font-size:clamp(24px,6vw,30px);margin:14px 0 16px}
  .article-meta{gap:10px;font-size:12px}
  .breadcrumb{height:48px;font-size:12px}
  .crumb-current{max-width:34ch}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:20px;margin-top:32px}
  .article-body h3{font-size:17px}
  .article-nav{grid-template-columns:1fr}
  .nav-cell.is-next{text-align:left;align-items:flex-start}
  .relate-list{grid-template-columns:1fr}
  .cta-inner{padding:34px 18px;flex-direction:column;align-items:flex-start}
  .footer-main{grid-template-columns:1fr 1fr;padding:40px 18px 28px}
  .footer-bottom-inner{height:auto;padding:16px 18px;flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .footer-main{grid-template-columns:1fr}
  .footer-col{padding:0}
  .article-empty{padding:36px 20px}
  .relate-list{gap:16px}
}

/* roulang page: category2 */
:root{
  --primary:#125C7A;
  --primary-deep:#0C4459;
  --tint:#E7F1F5;
  --accent:#D97A2B;
  --base:#F6F8FA;
  --surface:#FFFFFF;
  --line:#E3E9EF;
  --line-strong:#CDD8E1;
  --text:#1B2A33;
  --muted:#5C6E7A;
  --faint:#8C9AA4;
  --success:#2E7D57;
  --warning:#C98A16;
  --error:#C0472F;
  --r-card:14px;
  --r-img:12px;
  --r-block:18px;
  --r-btn:10px;
  --r-chip:6px;
  --shadow-card:0 1px 2px rgba(12,68,89,.05),0 10px 28px -14px rgba(12,68,89,.18);
  --shadow-hover:0 2px 4px rgba(12,68,89,.06),0 18px 40px -16px rgba(12,68,89,.26);
  --shadow-float:0 24px 60px -28px rgba(12,68,89,.30);
  --container:1200px;
  --t:180ms ease-out;
  --font:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(18,92,122,.35);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-sm{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px}
.section-head .section-title{font-size:clamp(24px,2.6vw,34px);line-height:1.3}
.section-head .section-sub{margin-top:10px;font-size:13px;color:var(--muted);letter-spacing:.02em}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ===== 顶部信息条 ===== */
.topbar{background:var(--primary-deep);color:#D7E6ED;font-size:12px;letter-spacing:.04em}
.topbar-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:36px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.topbar-note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:16px}
.topbar-domain{font-family:var(--mono);color:#9FC2D2;letter-spacing:.02em}
.btn-mini{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:6px;
  border:1px solid rgba(215,230,237,.5);color:#EAF4F8;font-size:12px;
  transition:background var(--t),border-color var(--t),color var(--t);
}
.btn-mini:hover{background:rgba(255,255,255,.12);border-color:#EAF4F8}

/* ===== 主导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;background:var(--surface);
  border-bottom:1px solid transparent;transition:box-shadow var(--t),border-color var(--t);
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 8px 24px -18px rgba(12,68,89,.45)}
.header-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:68px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:20px;letter-spacing:-.01em}
.brand-mark{
  width:34px;height:34px;border-radius:9px;background:var(--primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:14px;font-weight:700;letter-spacing:.02em;
}
.brand-text{color:var(--text)}
.nav-menu{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text);padding:24px 0;
  transition:color var(--t);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:14px;height:2px;width:0;background:var(--primary);
  transition:width var(--t);
}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--primary)}
.nav-link.is-active::after{width:100%}
.header-actions{display:flex;align-items:center;gap:14px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--primary);border-radius:2px;transition:transform var(--t),opacity var(--t)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.nav-drawer{
  position:fixed;inset:104px 0 0 0;background:var(--surface);z-index:55;
  padding:8px 24px 96px;overflow-y:auto;border-top:1px solid var(--line);
}
.nav-drawer[hidden]{display:none}
.nav-drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  height:56px;font-size:16px;border-bottom:1px solid var(--line);color:var(--text);
}
.nav-drawer a.drawer-link.is-active{color:var(--primary);font-weight:700}
.drawer-note{margin-top:20px;font-size:13px;color:var(--muted)}
.drawer-cta{position:fixed;left:0;right:0;bottom:0;padding:14px 24px;background:var(--surface);border-top:1px solid var(--line)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;padding:12px 24px;border-radius:var(--r-btn);
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px -14px rgba(12,68,89,.7)}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;border:1px solid var(--line-strong);color:var(--primary)}
.btn-ghost:hover{border-color:var(--primary);background:var(--tint)}
.btn-ghost:active{transform:translateY(1px)}
.link{
  color:var(--primary);font-size:14px;font-weight:500;
  text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;
  transition:color var(--t),text-decoration-thickness var(--t);
}
.link:hover{color:var(--accent);text-decoration-thickness:2px}

/* ===== 分类页窄头 ===== */
.page-head{
  position:relative;overflow:hidden;background:var(--primary-deep);
}
.page-head-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.55;transform:scale(1.02);
}
.page-head::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(12,68,89,.94) 0%,rgba(12,68,89,.80) 52%,rgba(12,68,89,.55) 100%);
}
.page-head-inner{position:relative;z-index:2;padding-top:52px;padding-bottom:56px;color:#EAF4F8}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#B9D3DE}
.breadcrumb a{color:#B9D3DE;transition:color var(--t)}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{color:#7FA6B6}
.breadcrumb em{font-style:normal;color:#fff}
.page-head h1{
  margin-top:20px;color:#fff;font-size:clamp(30px,4vw,46px);line-height:1.25;max-width:820px;
}
.page-head-sub{margin-top:16px;max-width:720px;font-size:16px;line-height:1.85;color:#CFE3EB}
.page-head-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.page-head-tags span{
  font-size:12px;letter-spacing:.06em;color:#DCEBF2;padding:5px 12px;border-radius:var(--r-chip);
  border:1px solid rgba(220,235,242,.36);background:rgba(255,255,255,.06);
}

/* ===== 标签横滚 ===== */
.chip-scroll{
  display:flex;gap:10px;overflow-x:auto;padding:4px 0 10px;scrollbar-width:thin;
}
.chip-scroll::-webkit-scrollbar{height:6px}
.chip-scroll::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:6px}
.chip{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 16px;
  border-radius:var(--r-chip);background:var(--tint);color:var(--primary);font-size:13px;font-weight:500;
  border:1px solid transparent;transition:background var(--t),border-color var(--t),color var(--t);
}
.chip:hover{background:#fff;border-color:var(--primary)}

/* ===== 适用场景卡 ===== */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:border-color var(--t),box-shadow var(--t),transform var(--t);
}
.scene-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-hover);transform:translateY(-2px)}
.scene-cover{position:relative;aspect-ratio:16/10;background:var(--tint)}
.scene-cover img{width:100%;height:100%}
.scene-body{padding:22px 22px 24px}
.scene-body h3{font-size:19px;line-height:1.45}
.scene-body p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--muted)}
.scene-meta{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:12px;letter-spacing:.05em;color:var(--faint)}

/* ===== 图文交错 ===== */
.feature-row{
  display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center;
  padding:48px 0;scroll-margin-top:110px;
}
.feature-row + .feature-row{border-top:1px solid var(--line)}
.feature-row.is-reverse{grid-template-columns:7fr 5fr}
.feature-row.is-reverse .feature-media{order:2}
.feature-row.is-reverse .feature-body{order:1}
.feature-media{
  margin:0;border-radius:var(--r-block);overflow:hidden;background:var(--tint);
  box-shadow:var(--shadow-card);aspect-ratio:4/3;
}
.feature-media img{width:100%;height:100%}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-chip);
  background:var(--tint);color:var(--primary);font-size:12px;font-weight:500;letter-spacing:.06em;
}
.feature-body h3{margin-top:16px;font-size:22px;line-height:1.4}
.feature-body > p{margin-top:14px;font-size:16px;line-height:1.85;color:var(--muted);max-width:700px}
.check-list{margin-top:20px;display:grid;gap:10px}
.check-list li{
  position:relative;padding-left:22px;font-size:15px;line-height:1.8;color:var(--text);
}
.check-list li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:2px;
  background:var(--primary);opacity:.85;
}
.feature-note{
  margin-top:18px;font-size:12px;color:var(--faint);letter-spacing:.02em;
}

/* ===== 阅读步骤 ===== */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.step{padding:32px 24px 34px;border-right:1px solid var(--line);transition:background var(--t)}
.step:last-child{border-right:0}
.step:hover{background:#fff}
.step-index{
  font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--accent);font-weight:700;
}
.step h3{margin-top:14px;font-size:17px;line-height:1.5}
.step p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--muted)}

/* ===== 参数清单表 ===== */
.spec-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-block);overflow:hidden}
.spec-table{width:100%;border-collapse:collapse;font-size:14px}
.spec-table caption{
  text-align:left;padding:22px 24px 16px;font-size:13px;color:var(--muted);letter-spacing:.03em;
}
.spec-table thead th{
  background:var(--tint);color:var(--primary);font-weight:500;font-size:13px;letter-spacing:.05em;
  text-align:left;padding:14px 24px;border-bottom:1px solid var(--line);
}
.spec-table tbody td{padding:18px 24px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--muted)}
.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table tbody tr{transition:background var(--t)}
.spec-table tbody tr:hover{background:#FBFDFE}
.spec-table td:first-child{color:var(--text);font-weight:500;white-space:nowrap}
.spec-table .mono{font-family:var(--mono);font-size:13px;color:var(--faint)}

/* ===== FAQ ===== */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:0 22px;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item[open]{box-shadow:var(--shadow-card)}
.faq-q{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:20px 0;font-size:16px;font-weight:500;line-height:1.6;color:var(--text);
}
.faq-q::-webkit-details-marker{display:none}
.faq-icon{
  position:relative;flex:0 0 auto;width:18px;height:18px;margin-top:4px;
  transition:transform 200ms ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .faq-icon{transform:rotate(45deg)}
.faq-a{
  padding:16px 0 22px;border-top:1px solid var(--line);
  font-size:15px;line-height:1.85;color:var(--muted);
}

/* ===== CTA ===== */
.cta-band{
  background:var(--tint);border:1px solid #D3E5EC;border-radius:var(--r-block);
  padding:44px 48px;display:flex;align-items:center;justify-content:space-between;gap:40px;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);line-height:1.35;color:var(--primary-deep)}
.cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--muted);max-width:640px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.cta-points span{
  font-size:12px;letter-spacing:.05em;color:var(--primary);background:#fff;
  border:1px solid #D3E5EC;border-radius:var(--r-chip);padding:5px 12px;
}

/* ===== 页脚 ===== */
.footer{background:#0A3846;color:#B7CDD7;margin-top:96px}
.footer-main{
  max-width:var(--container);margin:0 auto;padding:64px 24px 52px;
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
}
.footer-brand .brand{color:#fff}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:#fff;color:var(--primary-deep)}
.footer-note{margin-top:18px;font-size:14px;line-height:1.8;color:#9FBCC8;max-width:320px}
.footer-col{display:flex;flex-direction:column;gap:12px;border-left:1px solid rgba(255,255,255,.10);padding-left:28px}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:4px}
.footer-col a,.footer-col span{font-size:14px;color:#B7CDD7;line-height:1.7;transition:color var(--t),transform var(--t)}
.footer-col a{display:inline-block}
.footer-col a:hover{color:#7FC4DE;transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10)}
.footer-bottom-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:52px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  font-size:12px;letter-spacing:.03em;color:#8DAAB6;
}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{color:#8DAAB6;transition:color var(--t)}
.footer-links a:hover{color:#7FC4DE}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .feature-row{gap:36px}
  .cta-band{padding:40px 36px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .section-sm{padding:44px 0}
  .scene-grid{grid-template-columns:1fr 1fr}
  .feature-row,.feature-row.is-reverse{grid-template-columns:1fr;gap:26px}
  .feature-row.is-reverse .feature-media{order:0}
  .feature-row.is-reverse .feature-body{order:1}
  .feature-media{aspect-ratio:16/10}
  .steps{grid-template-columns:1fr 1fr}
  .step:nth-child(2){border-right:0}
  .step:nth-child(1),.step:nth-child(2){border-bottom:1px solid var(--line)}
  .cta-band{flex-direction:column;align-items:flex-start;gap:26px}
  .footer-main{grid-template-columns:1fr 1fr;gap:36px}
  .footer-col{border-left:0;padding-left:0}
}
@media (max-width:767px){
  .topbar{display:none}
  .nav-menu{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{height:62px;padding:0 18px}
  .header-actions .btn{display:none}
  .nav-drawer{inset:62px 0 0 0;padding:8px 18px 96px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:32px}
  .scene-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--line);padding:24px 0}
  .step:last-child{border-bottom:0}
  .step:nth-child(1),.step:nth-child(2){border-bottom:1px solid var(--line)}
  .faq-grid{grid-template-columns:1fr}
  .cta-band{padding:30px 22px;border-radius:var(--r-card)}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .spec-table thead th,.spec-table tbody td{padding:14px 16px}
  .spec-table caption{padding:18px 16px 12px}
  .page-head-inner{padding-top:36px;padding-bottom:40px}
  .footer-main{grid-template-columns:1fr;gap:32px;padding:48px 18px 40px}
  .footer-bottom-inner{height:auto;padding:16px 18px;flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:519px){
  .container{padding:0 16px}
  .page-head h1{font-size:clamp(26px,7vw,32px)}
  .feature-body h3{font-size:19px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .spec-table{font-size:13px}
  .spec-table td:first-child{white-space:normal}
  .footer-bottom-inner{padding:16px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
}

/* roulang page: category3 */
:root{
  --primary:#125C7A;
  --primary-deep:#0C4459;
  --tint:#E7F1F5;
  --tint-2:#F2F8FA;
  --accent:#D97A2B;
  --base:#F6F8FA;
  --surface:#FFFFFF;
  --line:#E3E9EF;
  --line-strong:#CDD8E1;
  --text:#1B2A33;
  --muted:#5C6E7A;
  --faint:#8C9AA4;
  --ok:#2E7D57;
  --warn:#C98A16;
  --err:#C0472F;
  --r-card:14px;
  --r-img:12px;
  --r-block:18px;
  --r-btn:10px;
  --r-pill:6px;
  --sh-card:0 1px 2px rgba(12,68,89,.05), 0 10px 28px -14px rgba(12,68,89,.18);
  --sh-hover:0 2px 4px rgba(12,68,89,.06), 0 18px 40px -16px rgba(12,68,89,.26);
  --sh-float:0 24px 60px -28px rgba(12,68,89,.30);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--base);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;height:auto;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid rgba(18,92,122,.28);outline-offset:2px;border-radius:4px}
.skip-link{
  position:absolute;left:16px;top:-60px;z-index:200;
  background:var(--primary);color:#fff;padding:10px 16px;border-radius:0 0 10px 10px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 容器 ---------- */
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.narrow{max-width:820px}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--primary-deep);color:#D6E6ED;font-size:12px;letter-spacing:.04em}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar-note{display:flex;align-items:center;gap:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:#66C2A8;display:inline-block}
.topbar-right{display:flex;align-items:center;gap:14px}
.topbar-domain{color:#9EC3D2;font-family:var(--mono);font-size:11.5px;letter-spacing:.02em}
.topbar-link{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;
  border:1px solid rgba(255,255,255,.38);border-radius:6px;color:#EAF4F8;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.topbar-link:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.7);color:#fff}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-stuck{box-shadow:0 2px 14px rgba(12,68,89,.09)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--text);letter-spacing:-.01em}
.brand-mark{
  width:34px;height:34px;border-radius:9px;background:var(--primary);color:#fff;
  display:grid;place-items:center;font-size:13px;font-weight:700;letter-spacing:.04em;
}
.brand:hover .brand-mark{background:var(--primary-deep)}
.brand-text{white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;display:inline-block;padding:23px 0;
  font-size:15px;font-weight:500;color:var(--muted);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left center;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--primary);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-strong);border-radius:10px;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--primary);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle:hover{border-color:var(--primary);background:var(--tint)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 移动抽屉 */
.nav-drawer{
  position:fixed;inset:104px 0 0;background:#fff;z-index:70;
  transform:translateY(-12px);opacity:0;visibility:hidden;
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  overflow-y:auto;border-top:1px solid var(--line);
  display:flex;flex-direction:column;
}
.nav-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-list{padding:8px 24px}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:56px;font-size:16px;font-weight:500;color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-link.is-active{color:var(--primary);font-weight:600}
.drawer-link .arrow{color:var(--faint)}
.drawer-foot{padding:20px 24px 32px;margin-top:auto;border-top:1px solid var(--line);background:var(--tint-2)}
.drawer-foot p{font-size:13px;color:var(--muted);margin-bottom:14px;line-height:1.7}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1;border-radius:var(--r-btn);
  padding:13px 24px;border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 1px 2px rgba(12,68,89,.10)}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:var(--sh-card)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-deep);background:var(--tint)}
.btn-ghost:active{transform:translateY(1px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#C06A22;transform:translateY(-1px);box-shadow:var(--sh-card)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.link{
  color:var(--primary);font-weight:500;
  border-bottom:1px solid var(--primary);padding-bottom:1px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.link:hover{color:var(--accent);border-bottom:2px solid var(--accent)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--primary)}
.link-arrow svg{transition:transform .18s var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}
.link-arrow:hover{color:var(--accent)}

/* ---------- 标签 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;line-height:1.4;letter-spacing:.06em;font-weight:500;
  padding:5px 10px;border-radius:var(--r-pill);
  background:var(--tint);color:var(--primary);
}
.badge-accent{background:rgba(217,122,43,.12);color:#A85B18}
.badge-line{background:#fff;border:1px solid var(--line-strong);color:var(--muted)}

/* ---------- 顶部页头 ---------- */
.page-head{
  position:relative;
  background-image:linear-gradient(rgba(255,255,255,.93),rgba(246,248,250,.96)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
  padding:36px 0 44px;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--text);font-weight:500}
.page-head h1{
  font-size:clamp(29px,4vw,46px);line-height:1.24;font-weight:700;
  letter-spacing:-.01em;color:var(--text);max-width:820px;
}
.page-head h1 .hl{color:var(--primary)}
.page-lead{margin-top:16px;font-size:16px;line-height:1.8;color:var(--muted);max-width:720px}
.index-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.index-tag{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13.5px;font-weight:500;color:var(--primary);
  background:var(--tint);border:1px solid transparent;border-radius:var(--r-pill);
  padding:8px 14px;transition:background .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),color .18s var(--ease);
}
.index-tag:hover{background:#fff;border-color:var(--primary);transform:translateY(-1px)}
.index-tag:active{transform:translateY(0)}
.index-tag .num{font-family:var(--mono);font-size:11.5px;color:var(--accent);letter-spacing:.04em}

/* ---------- 板块 ---------- */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:44px;max-width:760px}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.08em;font-weight:500;color:var(--primary);
  background:var(--tint);border-radius:var(--r-pill);padding:5px 11px;margin-bottom:16px;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);line-height:1.3;font-weight:700;letter-spacing:-.01em;
}
.section-head p{margin-top:14px;font-size:15.5px;color:var(--muted);line-height:1.85;max-width:720px}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- 分步概览（图文） ---------- */
.overview{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center}
.overview-visual{position:relative;border-radius:var(--r-block);overflow:hidden;box-shadow:var(--sh-card)}
.overview-visual img{width:100%;aspect-ratio:4/3.2;object-fit:cover}
.overview-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,68,89,0) 45%,rgba(12,68,89,.62) 100%);
}
.overview-cap{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;color:#fff;
  font-size:14px;line-height:1.7;
}
.overview-cap strong{display:block;font-size:16px;font-weight:700;margin-bottom:4px}
.steps{display:grid;gap:2px}
.step{
  display:grid;grid-template-columns:56px 1fr;gap:18px;align-items:start;
  padding:18px 0;border-bottom:1px solid var(--line);
}
.step:first-child{padding-top:0}
.step:last-child{border-bottom:none;padding-bottom:0}
.step-no{
  font-family:var(--mono);font-size:15px;font-weight:700;color:var(--primary);
  letter-spacing:.04em;padding-top:3px;
}
.step h3{font-size:17px;font-weight:700;line-height:1.5}
.step p{margin-top:6px;font-size:14.5px;color:var(--muted);line-height:1.8}

/* ---------- 小卡矩阵 ---------- */
.matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.matrix-card{
  min-height:150px;background:var(--tint-2);border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px;
  display:flex;flex-direction:column;gap:10px;
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.matrix-card:hover{background:#fff;border-color:var(--primary);box-shadow:var(--sh-hover);transform:translateY(-2px)}
.matrix-no{font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;color:var(--accent);font-weight:700}
.matrix-card h3{font-size:16px;font-weight:700;line-height:1.45}
.matrix-card p{font-size:13.5px;line-height:1.75;color:var(--muted)}
.matrix-card .matrix-foot{margin-top:auto;font-size:12.5px;color:var(--faint)}

/* ---------- 清单表 ---------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:#fff;
  box-shadow:var(--sh-card);
}
table{width:100%;border-collapse:collapse;font-size:14.5px}
thead th{
  background:var(--tint);color:var(--primary);font-weight:600;font-size:13.5px;
  letter-spacing:.04em;text-align:left;padding:15px 20px;white-space:nowrap;
}
tbody td{padding:16px 20px;border-top:1px solid var(--line);color:var(--muted);vertical-align:top;line-height:1.75}
tbody td:first-child{color:var(--text);font-weight:500;white-space:nowrap}
tbody tr:hover td{background:#FBFDFE}
td .mono{font-family:var(--mono);font-size:13.5px;color:var(--primary)}

/* ---------- 对比区 ---------- */
.compare{background:#fff;border:1px solid var(--line);border-radius:var(--r-block);padding:28px 28px 20px;box-shadow:var(--sh-card)}
.compare-legend{display:flex;gap:22px;flex-wrap:wrap;margin-bottom:22px;font-size:13px;color:var(--muted)}
.compare-legend .key{display:inline-flex;align-items:center;gap:8px}
.swatch{width:22px;height:8px;border-radius:4px;display:inline-block}
.swatch.gray{background:var(--line-strong)}
.swatch.blue{background:var(--primary)}
.compare-row{
  display:grid;grid-template-columns:200px 1fr;gap:20px;align-items:center;
  padding:18px 0;border-top:1px solid var(--line);
}
.compare-row:first-of-type{border-top:none}
.compare-label{font-size:14px;font-weight:500;color:var(--text)}
.compare-label span{display:block;font-size:12.5px;font-weight:400;color:var(--faint);margin-top:3px;line-height:1.6}
.bars{display:grid;gap:10px}
.bar-line{display:grid;grid-template-columns:76px 1fr 62px;gap:12px;align-items:center;font-size:12.5px;color:var(--muted)}
.bar-track{position:relative;height:10px;border-radius:6px;background:#EEF3F6;overflow:hidden}
.bar-fill{position:absolute;inset:0 auto 0 0;border-radius:6px;transition:width .6s var(--ease)}
.bar-fill.is-baseline{background:var(--line-strong)}
.bar-fill.is-target{background:var(--primary)}
.bar-value{font-family:var(--mono);text-align:right;color:var(--text);font-size:12.5px}
.compare-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:12.5px;color:var(--faint);line-height:1.75}

/* ---------- 延伸阅读 ---------- */
.reading-list{border-top:1px solid var(--line)}
.reading-item{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 4px;border-bottom:1px solid var(--line);
  transition:padding-left .2s var(--ease),background .2s var(--ease);
}
.reading-item:hover{padding-left:12px;background:var(--tint-2)}
.reading-main{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.reading-main h3{font-size:16px;font-weight:600;transition:color .18s var(--ease)}
.reading-item:hover .reading-main h3{color:var(--primary)}
.reading-main p{font-size:13.5px;color:var(--muted);line-height:1.7}
.reading-arrow{color:var(--faint);flex:0 0 auto;transition:color .18s var(--ease),transform .18s var(--ease)}
.reading-item:hover .reading-arrow{color:var(--accent);transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-img);overflow:hidden;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.faq-item:hover{border-color:var(--line-strong);box-shadow:var(--sh-card)}
.faq-item[open]{border-color:var(--primary);box-shadow:var(--sh-card)}
.faq-q{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;font-size:15.5px;font-weight:600;line-height:1.6;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q:hover{color:var(--primary)}
.faq-icon{
  flex:0 0 auto;width:24px;height:24px;border-radius:6px;border:1px solid var(--line-strong);
  display:grid;place-items:center;color:var(--primary);font-size:15px;line-height:1;
  transition:transform .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:var(--accent);color:var(--accent)}
.faq-a{padding:0 20px 18px;margin-top:0;border-top:1px solid var(--line);padding-top:15px;font-size:14.5px;line-height:1.85;color:var(--muted)}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:var(--tint);border:1px solid #D3E4EB;border-radius:var(--r-block);
  padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);line-height:1.35;font-weight:700;letter-spacing:-.01em}
.cta-band p{margin-top:10px;font-size:14.5px;color:var(--muted);line-height:1.8;max-width:640px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.footer{background:#0C2B36;color:#B9CDD6;margin-top:0}
.footer-main{
  max-width:1200px;margin:0 auto;padding:64px 24px 52px;
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
}
.footer-brand .brand{color:#fff;font-size:19px}
.footer-brand .brand-mark{background:var(--primary);}
.footer-brand .brand:hover .brand-mark{background:#1B7799}
.footer-note{margin-top:16px;font-size:13.5px;line-height:1.85;color:#90AAB5;max-width:320px}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-col a,.footer-col span{display:block;font-size:13.5px;color:#A5BEC8;line-height:1.8;padding:4px 0;transition:color .18s var(--ease),transform .18s var(--ease)}
.footer-col a:hover{color:var(--accent);transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12)}
.footer-bottom-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;min-height:52px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:#88A2AD;
}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{color:#88A2AD;transition:color .18s var(--ease)}
.footer-links a:hover{color:var(--accent)}
@media (min-width:1024px){
  .footer-col{border-left:1px solid rgba(255,255,255,.10);padding-left:32px}
  .footer-brand{border-left:none;padding-left:0}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .matrix{grid-template-columns:repeat(4,1fr);gap:14px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .overview{grid-template-columns:1fr;gap:32px}
  .overview-visual img{aspect-ratio:16/9}
  .matrix{grid-template-columns:repeat(2,1fr)}
  .footer-main{grid-template-columns:1fr 1fr;gap:32px;padding:52px 24px 40px}
  .footer-col{border-left:none;padding-left:0}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .topbar{display:none}
  .nav-menu{display:none}
  .nav-toggle{display:flex}
  .nav-drawer{inset:68px 0 0}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .faq-grid{grid-template-columns:1fr}
  .compare-row{grid-template-columns:1fr;gap:12px}
  .bar-line{grid-template-columns:70px 1fr 56px;gap:10px}
  .cta-band{padding:28px 24px}
  .page-head{padding:26px 0 34px}
  .page-head h1{font-size:clamp(26px,7vw,34px)}
  .matrix-card{min-height:auto}
}
@media (max-width:519px){
  .container{padding:0 16px}
  .matrix{grid-template-columns:1fr}
  .reading-item{flex-direction:row;align-items:flex-start}
  .footer-main{grid-template-columns:1fr;padding:44px 16px 32px}
  .footer-bottom-inner{padding:14px 16px;flex-direction:column;align-items:flex-start;gap:10px}
  .step{grid-template-columns:42px 1fr;gap:12px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
}