/* roulang page: index */
:root{
  --brand-700:#0A4C71;
  --brand-600:#0E5F8C;
  --brand-500:#1B79AA;
  --brand-100:#E4EFF6;
  --brand-050:#F2F7FB;
  --accent-500:#F97316;
  --accent-100:#FFEDD5;
  --data-up:#12A594;
  --data-down:#E0533D;
  --ink-900:#12242E;
  --ink-700:#2C4250;
  --ink-500:#5B707C;
  --ink-300:#93A6B0;
  --line:#DFE7EE;
  --bg:#F5F8FA;
  --surface:#FFFFFF;
  --surface-alt:#FAFCFD;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 1px 2px rgba(11,58,82,.06),0 8px 24px rgba(11,58,82,.06);
  --shadow-hover:0 10px 28px rgba(11,58,82,.12);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*,*::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:1.8;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;background:var(--brand-050);}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

.container{max-width:1200px;margin:0 auto;padding:0 32px;}
@media (max-width:1279px){.container{max-width:960px;}}
@media (max-width:1023px){.container{max-width:100%;padding:0 28px;}}
@media (max-width:767px){.container{padding:0 20px;}}

.section{padding:88px 0;}
.section-alt{background:var(--surface-alt);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-title{position:relative;padding-left:16px;font-size:26px;line-height:1.35;font-weight:700;color:var(--ink-900);}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand-600);}
.section-sub{margin-top:8px;font-size:15px;color:var(--ink-500);}
@media (max-width:767px){
  .section{padding:48px 0;}
  .section-title{font-size:22px;}
  .section-head{flex-direction:column;align-items:flex-start;margin-bottom:28px;}
}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 24px;border-radius:var(--radius-btn);font-size:15px;font-weight:600;border:1.5px solid transparent;cursor:pointer;transition:background .18s ease-out,color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 1px 2px rgba(11,58,82,.08);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 6px 18px rgba(14,95,140,.28);}
.btn-primary:active{transform:translateY(0);box-shadow:0 1px 2px rgba(11,58,82,.12);}
.btn-ghost{background:#fff;color:var(--brand-600);border-color:var(--brand-600);}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-accent{background:#fff;color:#B4530A;border-color:var(--accent-500);}
.btn-accent:hover{background:var(--accent-100);}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-weight:600;font-size:15px;border-bottom:1px solid transparent;padding:4px 0;transition:color .2s,border-color .2s;}
.btn-text:hover{color:var(--brand-700);border-bottom-color:var(--brand-700);}
.btn[disabled]{opacity:.4;cursor:not-allowed;}
.btn-block{width:100%;}

/* 徽章 */
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600;line-height:1.6;border:1px solid var(--brand-500);background:var(--brand-050);color:var(--brand-700);}
.badge-accent{border-color:var(--accent-500);background:var(--accent-100);color:#B4530A;}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease-out;}
.site-header.is-scrolled{box-shadow:0 4px 16px rgba(11,58,82,.06);}
.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:flex;align-items:center;gap:10px;min-height:44px;}
.brand-mark{flex:0 0 auto;}
.brand-text{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:.2px;white-space:nowrap;}
.brand-text .brand-short{display:none;}
.nav-right{display:flex;align-items:center;gap:28px;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-link{position:relative;display:inline-flex;align-items:center;min-height:44px;font-size:15px;color:var(--ink-700);padding:6px 0;transition:color .2s ease-out;}
.nav-link:hover{color:var(--brand-600);}
.nav-link.is-active{color:var(--brand-600);font-weight:600;}
.nav-link.is-active::after{content:"";position:absolute;left:0;right:0;bottom:8px;height:2px;border-radius:2px;background:var(--brand-600);}
.nav-cta{white-space:nowrap;}
.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;cursor:pointer;transition:background .18s,border-color .18s;}
.menu-toggle:hover{background:var(--brand-050);border-color:var(--brand-100);}
.drawer{position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;background:#fff;border-left:1px solid var(--line);box-shadow:-8px 0 30px rgba(11,58,82,.12);transform:translateX(102%);transition:transform .24s ease-out;z-index:80;padding:20px;overflow-y:auto;}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.drawer-title{font-size:15px;font-weight:700;color:var(--ink-900);}
.drawer-close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;cursor:pointer;}
.drawer-close:hover{background:var(--brand-050);}
.drawer-link{display:flex;align-items:center;justify-content:space-between;min-height:48px;padding:10px 4px;font-size:16px;color:var(--ink-700);border-bottom:1px solid var(--line);transition:color .2s;}
.drawer-link:hover{color:var(--brand-600);}
.drawer-link.is-active{color:var(--brand-600);font-weight:600;}
.drawer-cta{margin-top:20px;}
.mask{position:fixed;inset:0;background:rgba(18,36,46,.42);opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s;z-index:70;}
.mask.is-open{opacity:1;visibility:visible;}
@media (max-width:1023px){
  .nav-links,.nav-cta{display:none;}
  .menu-toggle{display:flex;}
}
@media (max-width:767px){
  .brand-text .brand-full{display:none;}
  .brand-text .brand-short{display:inline;}
}

/* Hero */
.hero{padding:88px 0;background:linear-gradient(180deg,var(--brand-050) 0%,#FFFFFF 92%);}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;}
.hero h1{margin-top:20px;font-size:40px;line-height:1.22;font-weight:700;color:var(--ink-900);}
.hero-sub{margin-top:18px;font-size:17px;color:var(--ink-700);max-width:560px;}
.hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px;}
.trust{display:flex;flex-wrap:wrap;gap:26px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line);}
.trust-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-500);}
.trust-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-500);flex:0 0 auto;}
.hero-media{position:relative;}
.hero-media img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-img);box-shadow:var(--shadow-card);}
.float-card{position:absolute;right:-20px;bottom:-26px;display:flex;gap:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:16px 22px;box-shadow:var(--shadow-hover);}
.float-item{min-width:96px;}
.float-num{font-size:22px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums;line-height:1.3;}
.float-num.is-accent{color:var(--accent-500);}
.float-label{font-size:13px;color:var(--ink-500);}
.hairline{height:1px;background:var(--line);}
@media (max-width:1279px){
  .float-card{right:8px;bottom:-22px;}
}
@media (max-width:1023px){
  .hero{padding:64px 0;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero h1{font-size:34px;}
}
@media (max-width:767px){
  .hero{padding:48px 0;}
  .hero h1{font-size:28px;line-height:1.3;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .float-card{display:none;}
  .trust{gap:16px;}
}

/* 指标看板 */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-card);transition:box-shadow .18s ease-out,transform .18s ease-out;}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.metric-num{font-size:42px;line-height:1.1;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums;}
.metric-num.is-accent{color:var(--accent-500);}
.metric-unit{font-size:14px;font-weight:600;color:var(--ink-500);margin-left:6px;}
.metric-name{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:14px;color:var(--ink-500);}
@media (max-width:1023px){.metrics{grid-template-columns:repeat(2,1fr);}}
@media (max-width:767px){.metric-num{font-size:34px;}}

/* 服务矩阵 */
.matrix{display:grid;grid-template-columns:1.15fr 1fr 1fr;grid-template-rows:auto auto;gap:24px;}
.m-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-card);transition:box-shadow .18s ease-out,transform .18s ease-out;}
.m-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.m-card-lg{grid-row:span 2;display:flex;flex-direction:column;background:linear-gradient(180deg,#FFFFFF 0%,var(--brand-050) 100%);}
.m-num{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;border:1.5px solid var(--brand-500);border-radius:50%;font-size:13px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums;}
.m-icon{margin-top:18px;}
.m-card h3{margin-top:14px;font-size:18px;line-height:1.55;font-weight:600;color:var(--ink-900);}
.m-card p{margin-top:10px;font-size:15px;color:var(--ink-500);}
.m-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.m-list li{position:relative;padding-left:18px;font-size:15px;color:var(--ink-700);}
.m-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--brand-500);}
.m-foot{margin-top:auto;padding-top:22px;}
.m-arrow{margin-top:16px;display:flex;justify-content:flex-end;color:var(--brand-600);}
.m-card-sm:hover .m-arrow{color:var(--brand-700);}
@media (max-width:1023px){
  .matrix{grid-template-columns:1fr 1fr;}
  .m-card-lg{grid-column:span 2;grid-row:auto;}
}
@media (max-width:767px){
  .matrix{grid-template-columns:1fr;}
  .m-card-lg{grid-column:span 1;}
}

/* 结果对比 */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.cmp-panel{border-radius:var(--radius-card);padding:26px;border:1px solid var(--line);}
.cmp-before{background:#F4F7F9;}
.cmp-after{background:#fff;border-color:var(--brand-100);box-shadow:var(--shadow-card);}
.cmp-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line);}
.cmp-title{font-size:17px;font-weight:700;color:var(--ink-900);}
.cmp-tag{font-size:13px;color:var(--ink-500);}
.cmp-row{margin-top:20px;}
.cmp-row-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;}
.cmp-row-name{font-size:15px;color:var(--ink-700);}
.cmp-row-val{font-size:15px;font-weight:700;color:var(--ink-500);font-variant-numeric:tabular-nums;}
.cmp-after .cmp-row-val{color:var(--brand-600);}
.cmp-bar{margin-top:10px;height:8px;border-radius:999px;background:#E7EDF1;overflow:hidden;}
.cmp-bar span{display:block;height:100%;border-radius:999px;background:#B6C3CB;}
.cmp-after .cmp-bar span{background:linear-gradient(90deg,var(--brand-600) 0%,var(--accent-500) 100%);}
@media (max-width:767px){.compare{grid-template-columns:1fr;}}

/* 内容卡 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-card);transition:transform .18s ease-out,box-shadow .18s ease-out;}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.news-cover{display:block;overflow:hidden;background:var(--brand-050);}
.news-cover img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .18s ease-out;}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-body{display:flex;flex-direction:column;flex:1;padding:22px;}
.news-title{margin-top:12px;font-size:18px;line-height:1.55;font-weight:600;color:var(--ink-900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-summary{margin-top:10px;font-size:15px;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-500);font-variant-numeric:tabular-nums;}
.news-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:14px;padding:56px 24px;background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius-card);}
.news-empty p{font-size:15px;color:var(--ink-500);}
@media (max-width:1023px){.news-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:767px){.news-grid{grid-template-columns:1fr;}}

/* FAQ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);transition:background .2s ease-out;}
.faq-item.is-open{background:var(--brand-050);}
.faq-q{width:100%;display:flex;align-items:center;gap:16px;padding:22px 16px;background:none;border:0;text-align:left;cursor:pointer;font-size:17px;font-weight:600;color:var(--ink-900);transition:color .2s;}
.faq-q:hover{color:var(--brand-600);}
.faq-index{flex:0 0 auto;width:28px;font-size:14px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums;}
.faq-q-text{flex:1;}
.faq-plus{flex:0 0 auto;width:26px;height:26px;position:relative;transition:transform .2s ease-out;color:var(--brand-600);}
.faq-item.is-open .faq-plus{transform:rotate(45deg);}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:currentColor;border-radius:2px;}
.faq-plus::before{left:12px;top:4px;width:2px;height:18px;}
.faq-plus::after{left:4px;top:12px;width:18px;height:2px;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s ease-out;}
.faq-a-inner{padding:0 16px 24px 60px;font-size:15px;color:var(--ink-700);}
@media (max-width:767px){.faq-a-inner{padding:0 12px 20px 12px;}.faq-q{padding:18px 12px;font-size:16px;}}

/* 表单 */
.form-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start;}
.value-item{display:flex;gap:14px;margin-bottom:22px;}
.value-icon{flex:0 0 auto;width:38px;height:38px;border-radius:10px;background:var(--brand-100);display:flex;align-items:center;justify-content:center;color:var(--brand-600);}
.value-title{font-size:16px;font-weight:600;color:var(--ink-900);}
.value-text{margin-top:4px;font-size:14px;color:var(--ink-500);}
.contact-line{margin-top:26px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--surface);font-size:14px;color:var(--ink-500);}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:28px;box-shadow:var(--shadow-card);}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink-700);margin-bottom:8px;}
.req{color:var(--accent-500);margin-left:4px;}
.input,.select,.textarea{width:100%;min-height:44px;padding:11px 14px;border:1px solid var(--line);border-radius:var(--radius-btn);background:#fff;color:var(--ink-900);transition:border-color .18s ease-out,box-shadow .18s ease-out;}
.textarea{min-height:112px;resize:vertical;line-height:1.7;}
.input::placeholder,.textarea::placeholder{color:var(--ink-300);}
.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(14,95,140,.1);}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-500);margin:6px 0 18px;}
.check-row input{width:18px;height:18px;margin-top:3px;accent-color:var(--brand-600);}
.form-note{margin-top:12px;font-size:12px;color:var(--ink-500);line-height:1.7;}
.form-feedback{margin-top:14px;font-size:14px;display:none;padding:12px 14px;border-radius:var(--radius-btn);}
.form-feedback.is-ok{display:block;background:var(--brand-050);color:var(--brand-700);border:1px solid var(--brand-100);}
.form-feedback.is-err{display:block;background:#FDEDEA;color:var(--data-down);border:1px solid #F6CFC6;}
.field.has-error .input,.field.has-error .select,.field.has-error .textarea{border-color:var(--data-down);}
.field-error{display:none;margin-top:6px;font-size:13px;color:var(--data-down);}
.field.has-error .field-error{display:block;}
@media (max-width:1023px){
  .form-grid{grid-template-columns:1fr;gap:32px;}
}
@media (max-width:767px){
  .form-card{padding:20px;}
}

/* CTA 条 */
.cta-band{background:var(--brand-700);color:#fff;border-radius:var(--radius-card);padding:40px 36px;display:flex;align-items:center;justify-content:space-between;gap:28px;}
.cta-band h2{font-size:24px;line-height:1.4;font-weight:700;color:#fff;}
.cta-band p{margin-top:8px;font-size:15px;color:rgba(255,255,255,.82);}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cta-band .btn-primary{background:#fff;color:var(--brand-700);}
.cta-band .btn-primary:hover{background:var(--brand-100);color:var(--brand-700);box-shadow:0 6px 18px rgba(0,0,0,.18);}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.14);}
@media (max-width:767px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}

/* 页脚 */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.78);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;}
.footer-brand-text{font-size:16px;font-weight:700;color:#fff;}
.footer-desc{margin-top:16px;font-size:14px;color:rgba(255,255,255,.76);max-width:280px;}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-list li{margin-bottom:12px;}
.footer-list a{font-size:14px;color:rgba(255,255,255,.78);transition:color .2s ease-out;}
.footer-list a:hover{color:#fff;}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.78);margin-bottom:12px;}
.footer-bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.18);padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.66);}
@media (max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  .site-footer{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}

/* roulang page: article */
:root{
  --brand-700:#0A4C71;
  --brand-600:#0E5F8C;
  --brand-500:#1B79AA;
  --brand-100:#E4EFF6;
  --brand-050:#F2F7FB;
  --accent-500:#F97316;
  --accent-100:#FFEDD5;
  --data-up:#12A594;
  --data-down:#E0533D;
  --ink-900:#12242E;
  --ink-700:#2C4250;
  --ink-500:#5B707C;
  --ink-300:#93A6B0;
  --line:#DFE7EE;
  --bg:#F5F8FA;
  --surface:#FFFFFF;
  --surface-alt:#FAFCFD;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 1px 2px rgba(11,58,82,.06),0 8px 24px rgba(11,58,82,.06);
  --shadow-hover:0 10px 28px rgba(11,58,82,.12);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--ink-700);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px}
.num{font-variant-numeric:tabular-nums}
.container{max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.2;cursor:pointer;
  border:1.5px solid transparent;transition:all .18s ease-out;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 6px 18px rgba(14,95,140,.28)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:#fff;color:var(--brand-600);border-color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100)}
.btn-ghost:active{background:var(--brand-050)}
.btn-text{color:var(--brand-600);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px;min-height:44px}
.btn-text:hover{text-decoration:underline;text-underline-offset:4px;color:var(--brand-700)}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600;
  background:var(--brand-050);border:1px solid var(--brand-500);color:var(--brand-700);
}
.badge-accent{background:var(--accent-100);border-color:var(--accent-500);color:#B45309}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:0 4px 16px rgba(11,58,82,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{border-radius:10px;flex:none}
.brand-text{display:flex;align-items:baseline;font-size:18px;font-weight:700;color:var(--ink-900);letter-spacing:.2px}
.brand-short{display:none}
.nav-right{display:flex;align-items:center;gap:26px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{
  position:relative;display:inline-block;padding:8px 2px;font-size:15px;color:var(--ink-700);
  transition:color .2s ease-out;
}
.nav-link:hover{color:var(--brand-600)}
.nav-link.is-active{color:var(--brand-600);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--brand-600);
}
.nav-cta{white-space:nowrap}
.menu-toggle{
  display:none;align-items:center;justify-content:center;width:44px;height:44px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-btn);cursor:pointer;
  transition:background .18s ease-out,border-color .18s ease-out;
}
.menu-toggle:hover{background:var(--brand-050);border-color:var(--brand-500)}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(320px,86vw);background:#fff;z-index:80;
  transform:translateX(102%);transition:transform .24s ease-out;
  box-shadow:-8px 0 28px rgba(11,58,82,.14);padding:20px;display:flex;flex-direction:column;gap:8px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.drawer-title{font-size:15px;font-weight:700;color:var(--ink-900)}
.drawer-close{
  width:44px;height:44px;border-radius:var(--radius-btn);border:1px solid var(--line);background:#fff;
  cursor:pointer;font-size:20px;line-height:1;color:var(--ink-700);
}
.drawer-close:hover{background:var(--brand-050);border-color:var(--brand-500)}
.drawer-link{
  display:block;padding:13px 12px;border-radius:var(--radius-btn);font-size:15px;color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer-link:hover{background:var(--brand-050);color:var(--brand-600)}
.drawer .btn{margin-top:12px;width:100%}
.backdrop{
  position:fixed;inset:0;background:rgba(10,40,58,.42);z-index:70;opacity:0;pointer-events:none;
  transition:opacity .24s ease-out;
}
.backdrop.is-open{opacity:1;pointer-events:auto}

/* ---------- 面包屑 ---------- */
.crumbs{padding:24px 0}
.crumbs ol{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:14px;color:var(--ink-500)}
.crumbs li{display:flex;align-items:center;gap:8px;min-width:0}
.crumbs a{color:var(--ink-500);transition:color .18s ease-out}
.crumbs a:hover{color:var(--brand-600)}
.crumbs .sep{color:var(--ink-300)}
.crumbs .current{
  color:var(--ink-500);max-width:46ch;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:inline-block;
  vertical-align:bottom;
}

/* ---------- 文章头部 ---------- */
.article-head{background:var(--surface);border-bottom:1px solid var(--line);padding:8px 0 40px}
.article-head-inner{max-width:860px}
.article-title{
  font-size:32px;line-height:40px;font-weight:700;color:var(--ink-900);margin-top:18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;
  font-size:14px;color:var(--ink-500);
}
.article-meta .dot{color:var(--ink-300)}
.rule-48{width:48px;height:4px;border-radius:999px;background:var(--brand-600);margin-top:22px}

/* ---------- 正文布局 ---------- */
.article-main{padding:48px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:48px;align-items:start}
.article-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:40px 44px;min-width:0;
}
.prose{max-width:800px;font-size:17px;line-height:1.85;color:var(--ink-700)}
.prose p{margin:0 0 1.1em}
.prose h2{
  position:relative;font-size:21px;line-height:1.5;font-weight:700;color:var(--ink-900);
  margin:2em 0 .8em;padding-left:14px;
}
.prose h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:3px;background:var(--brand-600)}
.prose h3{font-size:18px;line-height:1.6;font-weight:600;color:var(--ink-900);margin:1.6em 0 .6em}
.prose ul{margin:0 0 1.1em;padding-left:4px}
.prose ul li{position:relative;padding-left:20px;margin:.4em 0}
.prose ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--brand-500);
}
.prose ol{margin:0 0 1.1em;padding-left:22px;list-style:decimal;font-variant-numeric:tabular-nums}
.prose ol li{margin:.4em 0}
.prose ol li::marker{color:var(--brand-600);font-weight:700}
.prose blockquote{
  margin:1.4em 0;padding:16px 20px;background:var(--brand-050);
  border-left:3px solid var(--brand-600);border-radius:0 var(--radius-card) var(--radius-card) 0;color:var(--ink-700);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--radius-img);background:var(--brand-050);margin:1.4em 0 .6em;height:auto}
.prose figure{margin:1.4em 0}
.prose figcaption,.prose .caption{font-size:13px;color:var(--ink-500);text-align:center;line-height:1.7}
.prose a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--brand-700)}
.prose table{width:100%;border-collapse:collapse;font-size:15px;margin:1.4em 0}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.prose th{background:var(--brand-050);color:var(--ink-900);font-weight:600}
.prose .table-wrap{overflow-x:auto;margin:1.4em 0;border-radius:var(--radius-img)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.prose strong{color:var(--ink-900)}

.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;
  padding:48px 20px;color:var(--ink-500);
}
.empty-state svg{color:var(--brand-500)}
.empty-state .empty-title{font-size:18px;font-weight:600;color:var(--ink-900)}

/* ---------- 侧栏 ---------- */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:24px;min-width:0}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:24px;
}
.side-title{font-size:15px;font-weight:700;color:var(--ink-900);margin-bottom:14px}
.side-list li + li{border-top:1px solid var(--line)}
.side-list a{
  display:flex;gap:10px;padding:11px 0;font-size:14px;color:var(--ink-700);line-height:1.6;
  transition:color .18s ease-out;
}
.side-list a:hover{color:var(--brand-600)}
.side-list .idx{
  flex:none;width:20px;font-variant-numeric:tabular-nums;color:var(--brand-500);font-weight:700;
}
.side-cta{background:var(--brand-600);border-color:var(--brand-600);color:#fff}
.side-cta .side-title{color:#fff}
.side-cta p{font-size:14px;line-height:1.7;color:rgba(255,255,255,.86);margin-bottom:16px}
.side-cta .btn{
  width:100%;background:#fff;color:var(--brand-600);border-color:#fff;
}
.side-cta .btn:hover{background:var(--brand-050);color:var(--brand-700)}

/* ---------- 上一篇 / 下一篇 ---------- */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:40px}
.post-nav a{
  display:flex;flex-direction:column;gap:8px;padding:22px 24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.post-nav a:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand-500)}
.post-nav .dir{font-size:13px;color:var(--ink-500);display:flex;align-items:center;gap:6px}
.post-nav .ttl{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.6}
.post-nav .next{text-align:right;align-items:flex-end}

/* ---------- 相关推荐 ---------- */
.related{padding:0 0 88px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-title{position:relative;font-size:26px;line-height:36px;font-weight:700;color:var(--ink-900);padding-left:16px}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--brand-600)}
.section-sub{font-size:14px;color:var(--ink-500);margin-top:6px;padding-left:16px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform .18s ease-out,box-shadow .18s ease-out;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.card-media{position:relative;background:var(--brand-050);overflow:hidden}
.card-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .18s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-media .card-badge{position:absolute;left:12px;top:12px;background:#fff}
.card-body{display:flex;flex-direction:column;gap:10px;padding:20px;flex:1}
.card-title{
  font-size:18px;line-height:28px;font-weight:600;color:var(--ink-900);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-text{
  font-size:14px;line-height:1.75;color:var(--ink-500);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink-500);
}
.card-link{color:var(--brand-600);font-weight:600}
.card:hover .card-link{text-decoration:underline;text-underline-offset:4px}

/* ---------- 结尾 CTA ---------- */
.cta-band{
  background:var(--brand-700);border-radius:var(--radius-card);padding:40px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:22px;line-height:32px;font-weight:700;color:#fff}
.cta-band p{font-size:15px;color:rgba(255,255,255,.85);margin-top:8px;max-width:52ch}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.cta-band .btn-primary{background:var(--accent-500)}
.cta-band .btn-primary:hover{background:#EA6A0C;box-shadow:0 6px 18px rgba(249,115,22,.3)}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.82);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand-text{font-size:18px;font-weight:700;color:#fff}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.78);max-width:28ch}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-list li{margin-bottom:10px}
.footer-list a{font-size:14px;color:rgba(255,255,255,.8);transition:color .2s ease-out}
.footer-list a:hover{color:#fff}
.footer-contact li{font-size:14px;line-height:1.9;color:rgba(255,255,255,.8)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.7);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:960px}
}
@media (max-width:1023px){
  .container{padding:0 28px}
  .nav-links,.nav-cta{display:none}
  .menu-toggle{display:inline-flex}
  .article-layout{grid-template-columns:1fr;gap:32px}
  .sidebar{position:static;order:2}
  .article-body{padding:32px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .article-title{font-size:28px;line-height:36px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .brand-text{font-size:16px}
  .brand-full{display:none}
  .brand-short{display:inline}
  .crumbs{padding:18px 0}
  .crumbs .current{max-width:24ch}
  .article-head{padding:4px 0 28px}
  .article-title{font-size:26px;line-height:34px}
  .article-main{padding:32px 0 56px}
  .article-body{padding:24px 20px}
  .prose{font-size:16px;line-height:1.8}
  .prose h2{font-size:19px}
  .post-nav{grid-template-columns:1fr;gap:16px}
  .post-nav .next{text-align:left;align-items:flex-start}
  .related{padding:0 0 56px}
  .related-grid{grid-template-columns:1fr}
  .section-title{font-size:22px;line-height:30px}
  .cta-band{padding:28px 22px;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .site-footer{padding:48px 0 24px}
}

/* roulang page: category1 */
:root{
  --brand-700:#0A4C71;
  --brand-600:#0E5F8C;
  --brand-500:#1B79AA;
  --brand-100:#E4EFF6;
  --brand-050:#F2F7FB;
  --accent-500:#F97316;
  --accent-100:#FFEDD5;
  --data-up:#12A594;
  --data-down:#E0533D;
  --ink-900:#12242E;
  --ink-700:#2C4250;
  --ink-500:#5B707C;
  --ink-300:#93A6B0;
  --line:#DFE7EE;
  --bg:#F5F8FA;
  --surface:#FFFFFF;
  --surface-alt:#FAFCFD;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-card:0 1px 2px rgba(11,58,82,.06),0 8px 24px rgba(11,58,82,.06);
  --shadow-hover:0 10px 28px rgba(11,58,82,.12);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::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:1.8;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.35}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select,textarea{font:inherit}
.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (max-width:1024px){.container{padding:0 28px}}
@media (max-width:768px){.container{padding:0 20px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1.4;
  transition:background-color 180ms ease-out,color 180ms ease-out,box-shadow 180ms ease-out,transform 180ms ease-out,border-color 180ms ease-out;
  min-height:44px;
}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 1px 2px rgba(11,58,82,.08)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 6px 18px rgba(14,95,140,.28)}
.btn-primary:active{transform:translateY(0);box-shadow:0 1px 2px rgba(11,58,82,.12)}
.btn-ghost{background:#fff;color:var(--brand-600);border:1.5px solid var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-link{color:var(--brand-600);font-weight:600;padding:4px 0;text-underline-offset:4px;text-decoration:underline;text-decoration-color:rgba(14,95,140,.35)}
.btn-link:hover{color:var(--brand-700);text-decoration-color:var(--brand-700)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;
  font-size:13px;font-weight:600;line-height:1.5;
  color:var(--brand-700);background:var(--brand-050);
  border:1px solid rgba(14,95,140,.35);
}
.badge-accent{color:#B4470B;background:var(--accent-100);border-color:rgba(249,115,22,.45)}
.badge-soft{color:var(--ink-500);background:var(--surface-alt);border-color:var(--line)}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow 200ms ease-out;
}
.site-header.is-scrolled{box-shadow:0 4px 16px rgba(11,58,82,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{flex-shrink:0}
.brand-text{display:inline-flex;align-items:baseline;font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:.2px}
.brand-short{display:none}
.nav-right{display:flex;align-items:center;gap:28px}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--ink-700);transition:color 200ms ease-out;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand-600);transform:scaleX(0);transform-origin:left;transition:transform 200ms ease-out;
}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand-600);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-cta{padding:10px 20px;font-size:14px}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:#fff;transition:background-color 180ms ease-out,border-color 180ms ease-out;
}
.menu-toggle:hover{background:var(--brand-050);border-color:var(--brand-100)}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);z-index:90;
  background:#fff;box-shadow:-12px 0 32px rgba(11,58,82,.16);
  transform:translateX(105%);transition:transform 260ms ease-out;
  display:flex;flex-direction:column;padding:20px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-title{font-size:15px;font-weight:700;color:var(--ink-900)}
.drawer-close{
  width:44px;height:44px;border-radius:var(--radius-btn);border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;transition:background-color 180ms ease-out;
}
.drawer-close:hover{background:var(--brand-050)}
.drawer-links{display:flex;flex-direction:column;gap:4px;margin-bottom:24px}
.drawer-links a{
  display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:var(--radius-btn);
  font-size:15px;color:var(--ink-700);transition:background-color 180ms ease-out,color 180ms ease-out;
}
.drawer-links a:hover{background:var(--brand-050);color:var(--brand-600)}
.drawer-links a.is-active{color:var(--brand-600);font-weight:600;background:var(--brand-050)}
.drawer .btn{width:100%}
.drawer-mask{
  position:fixed;inset:0;background:rgba(11,58,82,.32);z-index:80;
  opacity:0;visibility:hidden;transition:opacity 240ms ease-out,visibility 240ms ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

@media (max-width:1023px){
  .nav-links,.nav-cta{display:none}
  .menu-toggle{display:inline-flex}
}
@media (max-width:767px){
  .brand-full{display:none}
  .brand-short{display:inline}
}

/* ---------- 面包屑 ---------- */
.crumb-bar{padding:24px 0 0}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-500);flex-wrap:wrap}
.crumb a{color:var(--brand-600);transition:color 180ms ease-out}
.crumb a:hover{color:var(--brand-700)}
.crumb .sep{color:var(--ink-300)}
.crumb .current{color:var(--ink-500)}

/* ---------- 页头 Banner ---------- */
.page-banner{
  position:relative;background:var(--brand-050);border-bottom:1px solid var(--line);
  padding:56px 0 0;overflow:hidden;
}
.banner-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start}
.page-banner h1{font-size:34px;line-height:42px;font-weight:700;margin:14px 0 16px;max-width:18em}
.banner-lead{font-size:16px;color:var(--ink-500);max-width:34em}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.banner-side{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:22px 20px;
}
.banner-side h2{font-size:14px;font-weight:700;color:var(--ink-900);letter-spacing:.4px}
.banner-side-list{margin-top:14px;display:flex;flex-direction:column;gap:12px}
.banner-side-item{display:flex;align-items:baseline;justify-content:space-between;gap:10px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.banner-side-item:last-child{border-bottom:none;padding-bottom:0}
.banner-side-item .k{font-size:13px;color:var(--ink-500)}
.banner-side-item .v{font-size:18px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums}
.banner-side-note{margin-top:14px;font-size:12px;color:var(--ink-500);line-height:1.7}
.wave-divider{display:block;width:100%;height:60px;margin-top:36px}
@media (max-width:900px){
  .banner-grid{grid-template-columns:1fr;gap:28px}
  .banner-side{max-width:420px}
}
@media (max-width:767px){
  .page-banner{padding-top:40px}
  .page-banner h1{font-size:28px;line-height:36px}
}

/* ---------- 通用版块 ---------- */
.section{padding:80px 0}
.section-alt{background:var(--surface-alt)}
.section-white{background:var(--surface)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:26px;line-height:36px;font-weight:700;position:relative;padding-left:16px}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand-600);
}
.section-head p{margin-top:12px;color:var(--ink-500);font-size:16px}
@media (max-width:767px){
  .section{padding:48px 0}
  .section-head h2{font-size:22px;line-height:32px}
}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.entry-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform 180ms ease-out,box-shadow 180ms ease-out,border-color 180ms ease-out;
}
.entry-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--brand-100)}
.entry-thumb{position:relative;aspect-ratio:4/3;background:var(--brand-050);overflow:hidden}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 180ms ease-out}
.entry-card:hover .entry-thumb img{transform:scale(1.03)}
.entry-thumb .badge{position:absolute;left:12px;top:12px;background:#fff}
.entry-body{display:flex;flex-direction:column;flex:1;padding:22px 24px 24px}
.entry-icon{
  width:40px;height:40px;border-radius:10px;background:var(--brand-100);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.entry-body h3{font-size:18px;line-height:28px;font-weight:600;margin-bottom:10px}
.entry-body p{font-size:15px;color:var(--ink-500);line-height:1.75}
.entry-points{margin:16px 0 20px;display:flex;flex-direction:column;gap:8px}
.entry-points li{position:relative;padding-left:18px;font-size:14px;color:var(--ink-700)}
.entry-points li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--brand-500);
}
.entry-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:6px}
@media (max-width:1023px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:767px){.card-grid{grid-template-columns:1fr;gap:18px}}

/* ---------- 微型指标条 ---------- */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);padding:28px 24px;
}
.metric-item{padding-right:20px;border-right:1px solid var(--line)}
.metric-item:last-child{border-right:none;padding-right:0}
.metric-value{display:flex;align-items:baseline;gap:4px;font-variant-numeric:tabular-nums}
.metric-value strong{font-size:34px;line-height:1.1;font-weight:700;color:var(--brand-600)}
.metric-value .unit{font-size:13px;color:var(--ink-500)}
.metric-name{margin-top:8px;font-size:14px;color:var(--ink-500)}
.metric-foot{margin-top:12px;padding-top:10px;border-top:1px solid var(--line);font-size:12px;color:var(--ink-300)}
@media (max-width:900px){
  .metric-strip{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .metric-item:nth-child(2){border-right:none;padding-right:0}
}
@media (max-width:520px){
  .metric-strip{grid-template-columns:repeat(2,minmax(0,1fr));padding:20px 18px}
  .metric-value strong{font-size:26px}
}

/* ---------- 场景图文 ---------- */
.scene-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center}
.scene-media{
  border-radius:var(--radius-img);overflow:hidden;background:var(--brand-050);
  box-shadow:var(--shadow-card);border:1px solid var(--line);
}
.scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.scene-list{display:flex;flex-direction:column;gap:18px;margin-top:24px}
.scene-item{display:flex;gap:14px;padding:18px 20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card)}
.scene-item .idx{
  flex-shrink:0;width:32px;height:32px;border-radius:999px;border:1.5px solid var(--brand-600);
  color:var(--brand-600);font-size:14px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.scene-item h3{font-size:16px;font-weight:600;margin-bottom:6px}
.scene-item p{font-size:14px;color:var(--ink-500);line-height:1.75}
@media (max-width:900px){.scene-grid{grid-template-columns:1fr;gap:28px}}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;
  padding:20px 16px;background:transparent;transition:background-color 200ms ease-out;
}
.faq-q:hover{background:var(--brand-050)}
.faq-item.is-open .faq-q{background:var(--brand-050)}
.faq-q .no{font-size:14px;font-weight:700;color:var(--brand-600);font-variant-numeric:tabular-nums;flex-shrink:0}
.faq-q .txt{flex:1;font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.7}
.faq-q .plus{
  flex-shrink:0;width:26px;height:26px;position:relative;color:var(--brand-600);
  transition:transform 200ms ease-out;
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
}
.faq-q .plus::before{width:14px;height:2px;transform:translate(-50%,-50%)}
.faq-q .plus::after{width:2px;height:14px;transform:translate(-50%,-50%)}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms ease-out}
.faq-a-inner{padding:0 16px 22px 46px;font-size:15px;color:var(--ink-700);line-height:1.85}
@media (max-width:767px){
  .faq-q{padding:16px 8px}
  .faq-a-inner{padding:0 8px 18px 30px;font-size:15px}
}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:linear-gradient(180deg,var(--brand-050),#fff);
  border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  padding:36px 32px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:22px;line-height:32px;font-weight:700}
.cta-band p{margin-top:8px;color:var(--ink-500);font-size:15px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
@media (max-width:767px){
  .cta-band{padding:26px 20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.82);margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand-text{font-size:17px;font-weight:700;color:#fff}
.footer-desc{font-size:14px;color:rgba(255,255,255,.72);line-height:1.8}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-list a,.footer-contact li{
  font-size:14px;color:rgba(255,255,255,.78);transition:color 200ms ease-out;
}
.footer-list a:hover{color:#fff}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);
  padding:20px 0 32px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.68);
}
@media (max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;padding:44px 0 28px;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* ---------- 通用小工具 ---------- */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.mt-32{margin-top:32px}

/* roulang page: category2 */
:root{
    --brand-700:#0A4C71;
    --brand-600:#0E5F8C;
    --brand-500:#1B79AA;
    --brand-100:#E4EFF6;
    --brand-050:#F2F7FB;
    --accent-500:#F97316;
    --accent-100:#FFEDD5;
    --data-up:#12A594;
    --data-down:#E0533D;
    --ink-900:#12242E;
    --ink-700:#2C4250;
    --ink-500:#5B707C;
    --ink-300:#93A6B0;
    --line:#DFE7EE;
    --bg:#F5F8FA;
    --surface:#FFFFFF;
    --surface-alt:#FAFCFD;
    --radius-card:14px;
    --radius-btn:10px;
    --radius-img:12px;
    --shadow-card:0 1px 2px rgba(11,58,82,.06), 0 8px 24px rgba(11,58,82,.06);
    --shadow-hover:0 10px 28px rgba(11,58,82,.12);
    --font-stack:-apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:var(--font-stack);
    font-size:16px;
    line-height:1.8;
    color:var(--ink-700);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;transition:color .2s ease-out,background-color .2s ease-out,border-color .2s ease-out;}
  button{font-family:inherit;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}
  .num{font-variant-numeric:tabular-nums;}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 32px;
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:44px;
    padding:12px 24px;
    border-radius:var(--radius-btn);
    border:1.5px solid transparent;
    font-size:15px;
    font-weight:600;
    letter-spacing:.01em;
    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;
  }
  .btn-primary{
    background:var(--brand-600);
    color:#fff;
  }
  .btn-primary:hover{
    background:var(--brand-700);
    transform:translateY(-1px);
    box-shadow:0 6px 18px rgba(14,95,140,.28);
  }
  .btn-primary:active{transform:translateY(0);box-shadow:none;}
  .btn-secondary{
    background:#fff;
    color:var(--brand-600);
    border-color:var(--brand-600);
  }
  .btn-secondary:hover{background:var(--brand-100);transform:translateY(-1px);}
  .btn-secondary:active{transform:translateY(0);}
  .btn-ghost{
    background:transparent;
    color:var(--brand-600);
    padding:8px 2px;
    min-height:36px;
    text-decoration:underline;
    text-underline-offset:4px;
    font-weight:600;
  }
  .btn-ghost:hover{color:var(--brand-700);}
  .btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--brand-600);
    outline-offset:2px;
    border-radius:6px;
  }

  /* ---------- 徽章 ---------- */
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:5px 14px;
    border-radius:999px;
    border:1px solid var(--brand-500);
    background:var(--brand-050);
    color:var(--brand-700);
    font-size:13px;
    font-weight:600;
    line-height:1.6;
  }
  .badge-accent{
    border-color:var(--accent-500);
    background:var(--accent-100);
    color:#9A4A05;
  }

  /* ---------- 头部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    background:#fff;
    border-bottom:1px solid var(--line);
    transition:box-shadow .24s ease-out;
  }
  .site-header.is-scrolled{box-shadow:0 4px 16px rgba(11,58,82,.06);}
  .nav{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    height:72px;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:10px;
    flex-shrink:0;
  }
  .brand-mark{flex-shrink:0;border-radius:10px;}
  .brand-text{display:flex;flex-direction:column;line-height:1.15;}
  .brand-full{
    font-size:17px;
    font-weight:700;
    color:var(--ink-900);
    letter-spacing:.01em;
  }
  .brand-short{display:none;font-size:17px;font-weight:700;color:var(--ink-900);}
  .nav-right{display:flex;align-items:center;gap:24px;}
  .nav-links{display:flex;align-items:center;gap:26px;}
  .nav-link{
    position:relative;
    display:inline-block;
    padding:6px 0;
    font-size:15px;
    color:var(--ink-700);
    white-space:nowrap;
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:0;
    right:0;
    bottom:0;
    height:2px;
    border-radius:2px;
    background:var(--brand-600);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform .2s ease-out;
  }
  .nav-link:hover{color:var(--brand-600);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--brand-600);font-weight:600;}
  .nav-link.is-active::after{transform:scaleX(1);}
  .nav-cta{padding:10px 20px;font-size:14.5px;}
  .menu-toggle{
    display:none;
    align-items:center;
    justify-content:center;
    width:44px;
    height:44px;
    border:1px solid var(--line);
    border-radius:var(--radius-btn);
    background:#fff;
    cursor:pointer;
    transition:background-color .18s ease-out,border-color .18s ease-out;
  }
  .menu-toggle:hover{background:var(--brand-050);border-color:var(--brand-500);}

  /* ---------- 移动抽屉 ---------- */
  .drawer-mask{
    position:fixed;
    inset:0;
    background:rgba(18,36,46,.42);
    opacity:0;
    visibility:hidden;
    transition:opacity .24s ease-out,visibility .24s ease-out;
    z-index:90;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible;}
  .mobile-drawer{
    position:fixed;
    top:0;
    right:0;
    width:min(86vw,360px);
    height:100%;
    background:#fff;
    box-shadow:-10px 0 30px rgba(11,58,82,.14);
    transform:translateX(102%);
    transition:transform .26s ease-out;
    z-index:100;
    display:flex;
    flex-direction:column;
    padding:20px;
    overflow-y:auto;
  }
  .mobile-drawer.is-open{transform:translateX(0);}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line);}
  .drawer-title{font-size:16px;font-weight:700;color:var(--ink-900);}
  .drawer-close{
    width:44px;height:44px;
    display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--line);border-radius:var(--radius-btn);
    background:#fff;color:var(--ink-700);font-size:22px;line-height:1;cursor:pointer;
    transition:background-color .18s ease-out,border-color .18s ease-out;
  }
  .drawer-close:hover{background:var(--brand-050);border-color:var(--brand-500);}
  .drawer-links{display:flex;flex-direction:column;gap:2px;padding:14px 0;}
  .drawer-links a{
    display:block;
    padding:13px 12px;
    border-radius:var(--radius-btn);
    font-size:15.5px;
    color:var(--ink-700);
    min-height:44px;
  }
  .drawer-links a:hover{background:var(--brand-050);color:var(--brand-700);}
  .drawer-links a.is-active{background:var(--brand-050);color:var(--brand-600);font-weight:600;box-shadow:inset 3px 0 0 var(--brand-600);}
  .drawer-cta{margin-top:auto;}

  /* ---------- 面包屑 ---------- */
  .breadcrumb{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:8px;
    padding:24px 0;
    font-size:13.5px;
    color:var(--ink-500);
  }
  .breadcrumb a{color:var(--ink-500);}
  .breadcrumb a:hover{color:var(--brand-600);}
  .breadcrumb .sep{color:var(--ink-300);}
  .breadcrumb .current{color:var(--ink-500);}

  /* ---------- 页头 ---------- */
  .page-head{
    background:linear-gradient(180deg,var(--brand-050) 0%,var(--surface-alt) 100%);
    border-bottom:1px solid var(--line);
    padding-bottom:64px;
  }
  .page-head .breadcrumb{padding-top:24px;}
  .page-head-grid{
    display:grid;
    grid-template-columns:1.35fr .95fr;
    gap:48px;
    align-items:end;
    padding-top:8px;
  }
  .page-head h1{
    margin-top:18px;
    font-size:34px;
    line-height:1.42;
    font-weight:700;
    color:var(--ink-900);
    letter-spacing:.01em;
  }
  .page-lead{
    font-size:16px;
    line-height:1.9;
    color:var(--ink-500);
    padding-left:24px;
    border-left:3px solid var(--brand-500);
  }

  /* ---------- 分栏布局 ---------- */
  .section{padding:80px 0;}
  .section-alt{background:var(--surface-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .split{
    display:grid;
    grid-template-columns:252px minmax(0,1fr);
    gap:56px;
    align-items:start;
  }

  .toc{
    position:sticky;
    top:96px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    padding:20px 18px;
  }
  .toc-title{
    font-size:13px;
    font-weight:700;
    letter-spacing:.06em;
    color:var(--ink-500);
    padding-bottom:12px;
    margin-bottom:8px;
    border-bottom:1px solid var(--line);
  }
  .toc a{
    display:block;
    padding:10px 12px;
    font-size:14.5px;
    line-height:1.6;
    color:var(--ink-700);
    border-left:2px solid transparent;
    border-radius:0 8px 8px 0;
    min-height:44px;
  }
  .toc a:hover{color:var(--brand-600);background:var(--brand-050);}
  .toc a.is-current{
    color:var(--brand-600);
    font-weight:600;
    border-left-color:var(--brand-600);
    background:var(--brand-050);
  }

  /* ---------- 长文分节 ---------- */
  .doc{max-width:800px;}
  .doc-section{padding-bottom:56px;}
  .doc-section + .doc-section{padding-top:56px;border-top:1px solid var(--line);}
  .doc-section h2{
    position:relative;
    padding-left:16px;
    font-size:24px;
    line-height:1.5;
    font-weight:700;
    color:var(--ink-900);
    margin-bottom:18px;
  }
  .doc-section h2::before{
    content:"";
    position:absolute;
    left:0;
    top:8px;
    bottom:8px;
    width:4px;
    border-radius:2px;
    background:var(--brand-600);
  }
  .doc-section h3{
    font-size:18px;
    line-height:1.6;
    font-weight:600;
    color:var(--ink-900);
    margin:26px 0 10px;
  }
  .doc p{font-size:16.5px;line-height:1.9;color:var(--ink-700);}
  .doc p + p{margin-top:1.1em;}
  .doc ul{margin-top:14px;display:flex;flex-direction:column;gap:10px;}
  .doc ul li{
    position:relative;
    padding-left:22px;
    font-size:16px;
    line-height:1.85;
    color:var(--ink-700);
  }
  .doc ul li::before{
    content:"";
    position:absolute;
    left:6px;
    top:.72em;
    width:7px;
    height:7px;
    border-radius:50%;
    background:var(--brand-600);
  }
  .doc a.inline-link{
    color:var(--brand-600);
    text-decoration:underline;
    text-underline-offset:4px;
  }
  .doc a.inline-link:hover{color:var(--brand-700);}

  .media-row{
    display:grid;
    grid-template-columns:1.05fr .95fr;
    gap:32px;
    align-items:center;
    margin-top:24px;
  }
  .media-figure{
    margin:0;
    border-radius:var(--radius-img);
    overflow:hidden;
    background:var(--brand-050);
    border:1px solid var(--line);
    box-shadow:var(--shadow-card);
  }
  .media-figure img{
    width:100%;
    aspect-ratio:4/3;
    object-fit:cover;
    transition:transform .18s ease-out;
  }
  .media-figure:hover img{transform:scale(1.03);}
  .media-figure figcaption{
    font-size:13px;
    color:var(--ink-500);
    padding:10px 14px;
    background:var(--surface);
    border-top:1px solid var(--line);
  }

  /* ---------- 关键数据小结卡 ---------- */
  .data-note{
    margin-top:28px;
    background:var(--brand-050);
    border:1px solid var(--brand-100);
    border-radius:var(--radius-card);
    padding:22px 24px;
  }
  .data-note h3{
    margin:0 0 14px;
    font-size:16px;
    font-weight:700;
    color:var(--brand-700);
  }
  .data-note-row{
    display:flex;
    align-items:baseline;
    justify-content:space-between;
    gap:20px;
    padding:12px 0;
    border-bottom:1px solid var(--brand-100);
  }
  .data-note-row:last-child{border-bottom:none;padding-bottom:0;}
  .data-note-label{font-size:14.5px;color:var(--ink-500);}
  .data-note-value{
    font-size:17px;
    font-weight:700;
    color:var(--brand-700);
    font-variant-numeric:tabular-nums;
    white-space:nowrap;
  }
  .data-note-value.accent{color:var(--accent-500);}

  /* ---------- FAQ ---------- */
  .faq-list{margin-top:36px;border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    gap:16px;
    padding:20px 8px;
    min-height:56px;
    background:transparent;
    border:0;
    cursor:pointer;
    text-align:left;
    transition:background-color .2s ease-out;
  }
  .faq-q:hover{background:var(--brand-050);}
  .faq-index{
    flex-shrink:0;
    width:28px;
    height:28px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border-radius:50%;
    border:1px solid var(--brand-500);
    color:var(--brand-600);
    font-size:13px;
    font-weight:700;
    font-variant-numeric:tabular-nums;
  }
  .faq-q h3{
    flex:1;
    font-size:16.5px;
    font-weight:600;
    line-height:1.7;
    color:var(--ink-900);
  }
  .faq-icon{
    flex-shrink:0;
    width:20px;
    height:20px;
    position:relative;
    transition:transform .2s ease-out;
  }
  .faq-icon::before,.faq-icon::after{
    content:"";
    position:absolute;
    background:var(--brand-600);
    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.is-open .faq-icon{transform:rotate(45deg);}
  .faq-item.is-open .faq-q{background:var(--brand-050);}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .2s ease-out;
  }
  .faq-a-inner{
    padding:0 8px 22px 52px;
    font-size:15.5px;
    line-height:1.9;
    color:var(--ink-500);
  }

  /* ---------- CTA 条 ---------- */
  .cta-band{
    background:var(--brand-050);
    border:1px solid var(--brand-100);
    border-radius:var(--radius-card);
    padding:40px 44px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
    box-shadow:var(--shadow-card);
  }
  .cta-band h2{
    font-size:22px;
    line-height:1.5;
    font-weight:700;
    color:var(--ink-900);
    margin-bottom:8px;
  }
  .cta-band p{font-size:15px;line-height:1.8;color:var(--ink-500);}
  .cta-actions{display:flex;gap:14px;flex-shrink:0;flex-wrap:wrap;}

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:var(--brand-700);
    color:#E4EFF6;
    padding:64px 0 0;
    margin-top:0;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1.2fr;
    gap:40px;
    padding-bottom:48px;
  }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
  .footer-brand-text{font-size:17px;font-weight:700;color:#fff;}
  .footer-desc{font-size:14px;line-height:1.9;color:rgba(228,239,246,.78);max-width:280px;}
  .footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
  .footer-list,.footer-contact{display:flex;flex-direction:column;gap:11px;}
  .footer-list a,.footer-contact li{
    font-size:14px;
    line-height:1.7;
    color:rgba(228,239,246,.78);
  }
  .footer-list a:hover{color:#fff;}
  .footer-bottom{
    display:flex;
    align-items:center;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:12px;
    padding:20px 0 26px;
    border-top:1px solid rgba(228,239,246,.22);
    font-size:13px;
    color:rgba(228,239,246,.7);
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1279px){
    .container{max-width:960px;}
  }
  @media (max-width:1023px){
    .container{padding:0 28px;}
    .nav{gap:16px;}
    .nav-links,.nav-cta{display:none;}
    .menu-toggle{display:inline-flex;}
    .page-head-grid{grid-template-columns:1fr;gap:24px;align-items:start;}
    .page-lead{padding-left:0;border-left:0;padding-top:18px;border-top:3px solid var(--brand-500);}
    .page-head h1{font-size:30px;}
    .section{padding:64px 0;}
    .split{grid-template-columns:1fr;gap:32px;}
    .toc{position:static;}
    .toc ul{display:grid;grid-template-columns:1fr 1fr;gap:4px;}
    .cta-band{flex-direction:column;align-items:flex-start;padding:32px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:767px){
    .container{padding:0 20px;}
    .brand-full{display:none;}
    .brand-short{display:inline-block;}
    body{font-size:16px;}
    .breadcrumb{padding:20px 0;font-size:13px;}
    .page-head{padding-bottom:48px;}
    .page-head h1{font-size:28px;line-height:1.45;margin-top:14px;}
    .section{padding:48px 0;}
    .doc-section{padding-bottom:40px;}
    .doc-section + .doc-section{padding-top:40px;}
    .doc-section h2{font-size:21px;}
    .media-row{grid-template-columns:1fr;gap:20px;}
    .toc ul{grid-template-columns:1fr;}
    .data-note{padding:18px;}
    .data-note-row{flex-direction:column;gap:4px;align-items:flex-start;}
    .faq-a-inner{padding-left:8px;}
    .cta-band{padding:26px 20px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
    .footer-desc{max-width:none;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }

/* roulang page: category3 */
:root{
  --brand-700:#0A4C71;--brand-600:#0E5F8C;--brand-500:#1B79AA;--brand-100:#E4EFF6;--brand-050:#F2F7FB;
  --accent-500:#F97316;--accent-100:#FFEDD5;
  --data-up:#12A594;--data-down:#E0533D;
  --ink-900:#12242E;--ink-700:#2C4250;--ink-500:#5B707C;--ink-300:#93A6B0;
  --line:#DFE7EE;--bg:#F5F8FA;--surface:#FFFFFF;--surface-alt:#FAFCFD;
  --radius-card:14px;--radius-ctl:10px;--radius-img:12px;
  --shadow-card:0 1px 2px rgba(11,58,82,.06),0 8px 24px rgba(11,58,82,.06);
  --shadow-hover:0 10px 28px rgba(11,58,82,.12);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);font-size:16px;line-height:1.8;color:var(--ink-700);
  background:var(--bg);overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}
.num{font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (min-width:1024px) and (max-width:1279.98px){.container{max-width:960px}}
@media (max-width:1023.98px){.container{padding:0 28px}}
@media (max-width:767.98px){.container{padding:0 20px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:0 4px 16px rgba(11,58,82,.06)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-full{font-size:16px;font-weight:700;color:var(--ink-900);letter-spacing:.2px}
.brand-short{display:none;font-size:16px;font-weight:700;color:var(--ink-900)}
.nav-right{display:flex;align-items:center;gap:22px}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-link{position:relative;display:inline-block;padding:6px 2px;font-size:15px;color:var(--ink-700);transition:color .2s ease}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand-600);transform:scaleX(0);transform-origin:left center;transition:transform .2s ease}
.nav-link:hover{color:var(--brand-600)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand-600);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.menu-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-ctl);transition:background .2s ease,border-color .2s ease}
.menu-toggle:hover{background:var(--brand-050);border-color:var(--brand-100)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 24px;border-radius:var(--radius-ctl);font-size:15px;font-weight:600;border:1.5px solid transparent;transition:background .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out,box-shadow .18s ease-out}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:0 6px 18px rgba(14,95,140,.28)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-secondary{background:var(--surface);color:var(--brand-600);border-color:var(--brand-600)}
.btn-secondary:hover{background:var(--brand-100)}
.btn-secondary:active{background:var(--brand-050)}
.btn-ghost{background:transparent;color:var(--brand-600);padding:8px 4px;min-height:auto;text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.btn-ghost:hover{color:var(--brand-700);text-decoration-thickness:2px}
.btn-on-dark{background:#fff;color:var(--brand-700)}
.btn-on-dark:hover{background:var(--brand-100);transform:translateY(-1px)}
.btn-outline-on-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.68)}
.btn-outline-on-dark:hover{background:rgba(255,255,255,.14)}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600}
.badge-brand{background:var(--brand-050);border:1px solid var(--brand-600);color:var(--brand-700)}
.badge-accent{background:var(--accent-100);border:1px solid var(--accent-500);color:#9A3412}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding:20px 0 0;font-size:14px;color:var(--ink-500)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb a{color:var(--ink-500);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:var(--ink-300)}
.breadcrumb .current{color:var(--ink-700);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- page head ---------- */
.page-head{background:var(--surface);border-bottom:1px solid var(--line);padding:36px 0 56px}
.page-head-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:48px;align-items:center}
.page-head h1{font-size:34px;line-height:42px;font-weight:700;color:var(--ink-900);letter-spacing:.2px;margin:16px 0 14px}
.page-lead{font-size:16px;color:var(--ink-500);max-width:60ch}
.page-head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.page-head-figure{border-radius:var(--radius-img);overflow:hidden;background:var(--brand-050);box-shadow:var(--shadow-card)}
.page-head-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ---------- sections ---------- */
.section{padding:80px 0}
.section-alt{background:var(--surface-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:72ch;margin-bottom:40px}
.section-head h2{font-size:26px;line-height:36px;font-weight:700;color:var(--ink-900);padding-left:14px;border-left:4px solid var(--brand-600)}
.section-head p{margin-top:12px;color:var(--ink-500)}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:56px}
.timeline::before{content:"";position:absolute;left:19px;top:10px;bottom:26px;width:2px;background:linear-gradient(180deg,var(--brand-600),var(--brand-100))}
.tl-item{position:relative;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-num{position:absolute;left:-56px;top:2px;width:40px;height:40px;border-radius:999px;background:var(--surface);border:2px solid var(--brand-600);color:var(--brand-600);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;font-variant-numeric:tabular-nums}
.tl-item h3{font-size:18px;line-height:28px;font-weight:600;color:var(--ink-900)}
.tl-item p{margin-top:8px;color:var(--ink-500);max-width:78ch}
.tl-tag{display:inline-block;margin-top:12px;font-size:13px;color:var(--brand-600);background:var(--brand-050);border-radius:999px;padding:4px 12px}

/* ---------- compare rows ---------- */
.cmp-stack{display:flex;flex-direction:column;gap:20px}
.cmp-row{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px;display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px;align-items:center;transition:transform .18s ease,box-shadow .18s ease}
.cmp-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.cmp-title h3{font-size:18px;line-height:28px;font-weight:600;color:var(--ink-900)}
.cmp-title p{margin-top:6px;font-size:14px;color:var(--ink-500)}
.cmp-col-label{font-size:13px;color:var(--ink-500);margin-bottom:6px}
.cmp-val{font-size:20px;line-height:1.4;font-weight:700;color:var(--ink-900);font-variant-numeric:tabular-nums}
.cmp-val.is-up{color:var(--brand-600)}
.cmp-bar{height:8px;border-radius:999px;background:var(--line);overflow:hidden;margin-top:12px}
.cmp-bar span{display:block;height:100%;border-radius:999px;background:#C8D4DC}
.cmp-bar.is-up span{background:linear-gradient(90deg,var(--brand-600),var(--accent-500))}
.cmp-note{margin-top:14px;font-size:13px;color:var(--ink-500)}

/* ---------- qa ---------- */
.qa-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.qa-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px;transition:transform .18s ease,box-shadow .18s ease}
.qa-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.qa-card .qa-index{font-size:13px;font-weight:700;color:var(--accent-500);font-variant-numeric:tabular-nums;letter-spacing:.08em}
.qa-card h3{margin-top:8px;font-size:18px;line-height:28px;font-weight:600;color:var(--ink-900)}
.qa-card p{margin-top:10px;color:var(--ink-500)}

/* ---------- cta ---------- */
.cta-band{background:var(--brand-700);color:#fff;padding:64px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:26px;line-height:36px;font-weight:700;color:#fff}
.cta-inner p{margin-top:10px;color:rgba(255,255,255,.82);max-width:62ch}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-700);color:rgba(255,255,255,.78);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand-text{font-size:16px;font-weight:700;color:#fff}
.footer-desc{margin-top:14px;font-size:14px;color:rgba(255,255,255,.72);max-width:30ch}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-list li,.footer-contact li{font-size:14px;line-height:2}
.footer-list a{color:rgba(255,255,255,.78);transition:color .2s ease}
.footer-list a:hover{color:#fff}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.18);font-size:13px;color:rgba(255,255,255,.62)}

/* ---------- drawer ---------- */
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(88vw,360px);background:var(--surface);z-index:90;transform:translateX(102%);transition:transform .28s ease;padding:20px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;box-shadow:-8px 0 28px rgba(11,58,82,.14)}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:12px}
.drawer-title{font-size:15px;font-weight:700;color:var(--ink-900)}
.drawer-close{width:44px;height:44px;border-radius:var(--radius-ctl);border:1px solid var(--line);background:var(--surface);font-size:20px;line-height:1;color:var(--ink-700);transition:background .2s ease}
.drawer-close:hover{background:var(--brand-050)}
.drawer-links li a{display:block;padding:14px 12px;border-radius:var(--radius-ctl);font-size:15px;color:var(--ink-700);transition:background .2s ease,color .2s ease}
.drawer-links li a:hover{background:var(--brand-050);color:var(--brand-600)}
.drawer-links li a.is-active{color:var(--brand-600);font-weight:600;background:var(--brand-050)}
.drawer-cta{margin-top:16px;width:100%}
.drawer-mask{position:fixed;inset:0;background:rgba(10,76,113,.34);opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;z-index:80}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ---------- responsive ---------- */
@media (max-width:1023.98px){
  .nav-links,.nav-cta{display:none}
  .menu-toggle{display:inline-flex}
  .page-head-grid{grid-template-columns:1fr;gap:32px}
  .page-head{padding:28px 0 48px}
  .section{padding:64px 0}
  .cmp-row{grid-template-columns:1fr 1fr;gap:20px}
  .cmp-row .cmp-title{grid-column:1 / -1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .brand-full{display:none}
  .brand-short{display:inline}
  .page-head h1{font-size:28px;line-height:36px}
  .section{padding:48px 0}
  .section-head h2{font-size:22px;line-height:32px}
  .cta-inner h2{font-size:22px;line-height:32px}
  .qa-grid{grid-template-columns:1fr}
  .cmp-row{grid-template-columns:1fr;padding:20px}
  .timeline{padding-left:44px}
  .timeline::before{left:15px}
  .tl-num{left:-44px;width:32px;height:32px;font-size:13px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}