/* roulang page: index */
:root{
  --c-primary:#2563EB;
  --c-primary-dark:#1D4ED8;
  --c-primary-soft:#DBEAFE;
  --c-accent:#06B6D4;
  --c-warm:#F59E0B;
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FA;
  --c-text:#0F172A;
  --c-text-2:#475569;
  --c-text-3:#94A3B8;
  --c-border:#E2E8F0;
  --sh-1:0 1px 2px rgba(15,23,42,.05);
  --sh-2:0 8px 24px rgba(15,23,42,.07);
  --sh-3:0 16px 40px rgba(37,99,235,.14);
  --r-card:16px;
  --r-media:14px;
  --r-input:10px;
  --r-tag:8px;
  --r-pill:999px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;background-color:var(--c-surface-2)}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font-family:inherit;font-size:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3}
p{margin:0}
h1{font-size:40px;line-height:1.25}
h2{font-size:30px;line-height:1.3}
h3{font-size:22px;line-height:1.4;font-weight:600}
h4{font-size:18px;line-height:1.45;font-weight:600}
::selection{background:var(--c-primary-soft);color:var(--c-primary-dark)}
:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:88px 0}
.section-alt{background:var(--c-surface-2)}
.section-white{background:var(--c-surface)}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);font-size:15px;font-weight:600;
  padding:12px 24px;border:1px solid transparent;cursor:pointer;line-height:1.2;
  transition:background .2s ease,border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(37,99,235,.22)}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(37,99,235,.26)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(37,99,235,.2)}
.btn-secondary{background:#fff;color:var(--c-primary);border-color:#BFDBFE}
.btn-secondary:hover{background:var(--c-primary-soft);border-color:var(--c-primary-soft)}
.btn-ghost{background:transparent;color:var(--c-text-2);border-color:var(--c-border)}
.btn-ghost:hover{color:var(--c-primary);border-color:#BFDBFE;background:#fff}
.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.link-arrow span{transition:transform .2s ease}
.link-arrow:hover span{transform:translateX(4px)}
.text-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary)}
.text-arrow em{font-style:normal;transition:transform .2s ease}
.text-arrow:hover em{transform:translateX(4px)}

/* ===== 标签 / 徽章 ===== */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;letter-spacing:.04em;padding:5px 12px;border-radius:var(--r-pill)}
.badge-primary{background:var(--c-primary-soft);color:var(--c-primary-dark)}
.badge-accent{background:#CFFAFE;color:#0E7490}
.badge-warm{background:#FEF3C7;color:#B45309}
.tag{display:inline-block;font-size:12px;line-height:1.4;padding:3px 9px;border-radius:var(--r-tag);background:var(--c-surface-2);color:var(--c-text-2);letter-spacing:.04em}
.tag-primary{background:var(--c-primary-soft);color:var(--c-primary-dark)}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--c-primary);background:var(--c-primary-soft);padding:4px 10px;border-radius:var(--r-tag);margin-bottom:12px}

/* ===== 导航 ===== */
.site-header{position:fixed;top:16px;left:0;right:0;z-index:120;display:flex;justify-content:center;padding:0 16px;pointer-events:none}
.nav-shell{
  pointer-events:auto;width:100%;max-width:1140px;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--c-border);border-radius:var(--r-pill);
  box-shadow:var(--sh-2);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header.scrolled .nav-shell{background:rgba(255,255,255,.96);box-shadow:0 12px 30px rgba(15,23,42,.1)}
.nav-inner{display:flex;align-items:center;gap:16px;padding:10px 12px 10px 18px;position:relative}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-text);white-space:nowrap}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--c-primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;flex-shrink:0;
}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links > a{padding:8px 14px;border-radius:var(--r-pill);font-size:15px;font-weight:500;color:var(--c-text-2);position:relative;transition:color .2s ease,background .2s ease}
.nav-links > a:hover{color:var(--c-primary);background:var(--c-primary-soft)}
.nav-links > a.active{color:var(--c-primary)}
.nav-links > a.active::after{content:"";position:absolute;left:50%;bottom:1px;transform:translateX(-50%);width:18px;height:2px;border-radius:2px;background:var(--c-primary)}
.nav-links a.nav-mobile-cta{display:none}
.nav-cta{padding:9px 20px;font-size:14px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--c-border);background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;margin-left:auto;flex-shrink:0;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-text);transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ===== 首屏 ===== */
.hero{position:relative;overflow:hidden;padding:160px 0 80px;background:linear-gradient(140deg,#EAF2FE 0%,#F4F8FE 46%,var(--c-bg) 100%)}
.hero::before{
  content:"";position:absolute;right:-180px;top:-140px;width:660px;height:660px;border-radius:50%;
  background:radial-gradient(circle at 32% 32%,rgba(6,182,212,.2),rgba(37,99,235,.12) 46%,rgba(37,99,235,0) 72%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;left:-120px;bottom:-220px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(37,99,235,.1),rgba(37,99,235,0) 70%);pointer-events:none;
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-copy{max-width:600px}
.hero h1{margin:18px 0 16px}
.hero-sub{font-size:18px;line-height:1.8;color:var(--c-text-2);max-width:34em}
.trust-list{display:flex;flex-wrap:wrap;gap:12px 22px;margin:24px 0 32px}
.trust-list li{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--c-text-2);line-height:1.5}
.trust-list svg{width:16px;height:16px;flex-shrink:0;color:var(--c-primary)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-media{position:relative;padding:0 26px 26px 0}
.hero-media-outline{position:absolute;top:26px;left:26px;right:0;bottom:0;border:1px solid #C7DAFB;border-radius:20px;pointer-events:none}
.hero-media img{position:relative;z-index:1;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;border:1px solid rgba(255,255,255,.9);box-shadow:var(--sh-3)}

/* ===== 板块头 ===== */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.sec-head h2{margin-top:6px}
.sec-note{font-size:14px;line-height:1.7;color:var(--c-text-3);max-width:340px}

/* ===== 步骤区 ===== */
.steps{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-2);padding:8px 32px}
.step{display:grid;grid-template-columns:72px 1fr;gap:24px;padding:30px 0;border-bottom:1px dashed var(--c-border)}
.step:last-child{border-bottom:0}
.step-rail{position:relative;display:flex;justify-content:center}
.step-dot{
  width:44px;height:44px;border-radius:50%;background:var(--c-primary-soft);color:var(--c-primary-dark);
  font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:center;position:relative;z-index:1;flex-shrink:0;
}
.step-rail::before{content:"";position:absolute;top:52px;bottom:-32px;left:50%;width:0;border-left:1px dashed #C7DAFB;transform:translateX(-50%)}
.step:last-child .step-rail::before{display:none}
.step-body h3{margin-bottom:10px}
.step-body p{font-size:15px;line-height:1.85;color:var(--c-text-2);max-width:44em}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}

/* ===== 卡片网格 ===== */
.card-grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-2);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:var(--c-primary-soft)}
.card-media{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--c-border)}
.card-body{padding:16px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:16px;font-weight:600;line-height:1.5}
.card-text{font-size:13px;line-height:1.7;color:var(--c-text-3)}
.sec-foot{display:flex;justify-content:flex-end;margin-top:28px}

/* ===== 进度轨道 ===== */
.track{position:relative;padding-top:8px}
.track-rail{position:absolute;left:12.5%;right:12.5%;top:38px;height:8px;border-radius:var(--r-pill);background:var(--c-primary-soft);overflow:hidden}
.track-fill{position:absolute;left:0;top:0;bottom:0;width:52%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.track-nodes{display:grid;grid-template-columns:repeat(4,1fr);position:relative}
.track-node{display:flex;flex-direction:column;align-items:center;text-align:center;padding:0 8px}
.node-label{font-size:14px;font-weight:600;line-height:22px;margin-bottom:14px;white-space:nowrap}
.node-dot{width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid var(--c-primary-soft);box-shadow:0 0 0 4px var(--c-bg);position:relative;z-index:1}
.track-node.is-current .node-dot{background:var(--c-primary);border-color:#fff;box-shadow:0 0 0 4px var(--c-bg),0 0 0 7px var(--c-primary-soft)}
.node-desc{font-size:12px;line-height:1.7;color:var(--c-text-3);margin-top:14px;max-width:16em}

/* ===== 最新信息列表 ===== */
.info-list{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-2);overflow:hidden}
.info-row{display:grid;grid-template-columns:96px 1fr;gap:20px;padding:20px 24px;border-bottom:1px solid var(--c-border);transition:background .2s ease}
.info-row:last-child{border-bottom:0}
.info-row:hover{background:#FAFCFF}
.info-row:hover .info-title{color:var(--c-primary)}
.info-thumb{width:96px;height:96px;border-radius:12px;object-fit:cover;border:1px solid var(--c-border)}
.info-body{display:flex;flex-direction:column;gap:6px;min-width:0}
.info-title{font-size:17px;font-weight:600;line-height:1.55;transition:color .2s ease}
.info-summary{font-size:14px;line-height:1.75;color:var(--c-text-2)}
.info-meta{display:flex;align-items:center;flex-wrap:wrap;gap:8px 12px;margin-top:4px;font-size:12px;color:var(--c-text-3)}
.meta-more{display:inline-flex;align-items:center;gap:4px;color:var(--c-primary);font-weight:600}
.empty-state{
  background:#fff;border:1px dashed #C7DAFB;border-radius:var(--r-card);
  min-height:180px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:8px;text-align:center;padding:32px 24px;
}
.empty-state svg{width:36px;height:36px;color:var(--c-primary);opacity:.7}
.empty-state p{font-size:15px;color:var(--c-text-2)}
.empty-sub{font-size:13px;color:var(--c-text-3)}

/* ===== FAQ ===== */
.faq-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:56px;align-items:start}
.faq-side p{font-size:15px;line-height:1.85;color:var(--c-text-2);margin:16px 0 26px;max-width:30em}
.acc-item{background:var(--c-surface-2);border:1px solid transparent;border-radius:12px;margin-bottom:12px;overflow:hidden;transition:background .2s ease,border-color .2s ease,box-shadow .2s ease}
.acc-item.is-open{background:#fff;border-color:var(--c-primary-soft);box-shadow:var(--sh-1)}
.acc-head{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 18px;text-align:left;font-size:16px;font-weight:600;color:var(--c-text);line-height:1.6}
.acc-icon{position:relative;width:18px;height:18px;flex-shrink:0}
.acc-icon::before,.acc-icon::after{content:"";position:absolute;background:var(--c-primary);border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.acc-icon::before{left:0;top:8px;width:18px;height:2px}
.acc-icon::after{top:0;left:8px;width:2px;height:18px}
.acc-item.is-open .acc-icon::after{transform:rotate(90deg);opacity:0}
.acc-panel{display:none;padding:0 18px 18px;border-top:1px solid var(--c-border);font-size:15px;line-height:1.8;color:var(--c-text-2);margin-top:0}
.acc-panel p{padding-top:14px}
.acc-item.is-open .acc-panel{display:block}

/* ===== 底部 CTA ===== */
.cta-wrap{padding:0 0 88px}
.cta-card{
  position:relative;overflow:hidden;background:#EFF6FF;border-radius:24px;
  padding:60px 32px;text-align:center;
}
.cta-card::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(135deg,rgba(37,99,235,.05) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-card > *{position:relative;z-index:1}
.cta-card h2{margin-bottom:14px}
.cta-card p{font-size:16px;color:var(--c-text-2);max-width:38em;margin:0 auto 30px}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px}
.corner{position:absolute;width:26px;height:26px;border:2px solid var(--c-primary);opacity:.5;pointer-events:none}
.corner-tl{top:14px;left:14px;border-right:0;border-bottom:0;border-radius:10px 0 0 0}
.corner-tr{top:14px;right:14px;border-left:0;border-bottom:0;border-radius:0 10px 0 0}
.corner-bl{bottom:14px;left:14px;border-right:0;border-top:0;border-radius:0 0 0 10px}
.corner-br{bottom:14px;right:14px;border-left:0;border-top:0;border-radius:0 0 10px 0}

/* ===== 页脚 ===== */
.site-footer{background:#fff;border-top:1px solid var(--c-border)}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:56px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:1.8;color:var(--c-text-2);max-width:26em}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--c-text)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text-2);display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--c-primary);transform:translateX(2px)}
.footer-bottom{border-top:1px solid var(--c-border);padding:20px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;line-height:1.7;color:var(--c-text-3)}

/* ===== 响应式 ===== */
@media (max-width:1023px){
  h1{font-size:32px}
  h2{font-size:25px}
  h3{font-size:20px}
  .container{padding:0 24px}
  .section{padding:64px 0}
  .nav-toggle{display:flex}
  .nav-inner{padding:8px 10px 8px 14px}
  .nav-links{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    background:#fff;border:1px solid var(--c-border);border-radius:16px;box-shadow:var(--sh-3);
    padding:8px;flex-direction:column;align-items:stretch;gap:2px;display:none;margin-left:0;
  }
  .nav-links.is-open{display:flex}
  .nav-links > a{padding:12px 14px;border-radius:12px;min-height:48px;display:flex;align-items:center}
  .nav-links > a.active{background:var(--c-primary-soft)}
  .nav-links > a.active::after{display:none}
  .nav-links a.nav-mobile-cta{display:flex;justify-content:center;background:var(--c-primary);color:#fff;border-radius:var(--r-pill);margin-top:8px;padding:12px 18px}
  .nav-links a.nav-mobile-cta:hover{background:var(--c-primary-dark);color:#fff}
  .nav-cta{display:none}
  .site-header{top:12px;padding:0 12px}
  .nav-shell{border-radius:16px}
  .hero{padding:132px 0 64px}
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-copy{max-width:none}
  .hero-media{padding:0 18px 18px 0;max-width:620px}
  .hero-media-outline{top:18px;left:18px}
  .card-grid-4{grid-template-columns:repeat(2,1fr)}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
  .track-rail{left:12.5%;right:12.5%}
  .node-label{font-size:13px}
  .node-desc{font-size:11px}
}
@media (max-width:767px){
  h1{font-size:27px}
  h2{font-size:22px}
  h3{font-size:18px}
  body{font-size:15px}
  .container{padding:0 16px}
  .section{padding:48px 0}
  .hero{padding:118px 0 48px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{flex:1 1 100%}
  .sec-head{margin-bottom:28px}
  .sec-note{max-width:none}
  .steps{padding:4px 20px}
  .step{grid-template-columns:1fr;gap:14px;padding:24px 0}
  .step-rail{justify-content:flex-start}
  .step-rail::before{top:0;bottom:-26px;left:21px;transform:none}
  .card-grid-4{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:16px;padding-bottom:10px;margin:0 -16px;padding-left:16px;padding-right:16px}
  .card-grid-4 > .card{flex:0 0 78%;scroll-snap-align:start}
  .track-rail{display:none}
  .track-nodes{grid-template-columns:1fr}
  .track-node{display:grid;grid-template-columns:20px 1fr;gap:4px 14px;text-align:left;align-items:start;padding:16px 0;border-bottom:1px dashed var(--c-border)}
  .track-node:last-child{border-bottom:0}
  .node-label{grid-column:2;grid-row:1;margin:0;white-space:normal}
  .node-dot{grid-column:1;grid-row:1;margin-top:5px;box-shadow:none}
  .node-desc{grid-column:2;grid-row:2;margin:4px 0 0;max-width:none}
  .info-row{grid-template-columns:1fr;gap:14px;padding:18px}
  .info-thumb{width:100%;height:170px}
  .cta-wrap{padding-bottom:48px}
  .cta-card{padding:44px 20px;border-radius:18px}
  .cta-actions .btn{flex:1 1 100%}
  .footer-top{grid-template-columns:1fr;gap:28px;padding:40px 0 28px}
  .footer-bottom{flex-direction:column;gap:6px}
}
@media (max-width:420px){
  h1{font-size:24px}
  .hero-media{padding:0 12px 12px 0}
  .hero-media-outline{top:12px;left:12px;border-radius:16px}
  .hero-media img{border-radius:16px}
  .accordion .acc-head{font-size:15px}
}

/* roulang page: category1 */
:root{
  --c-primary:#2563EB;
  --c-primary-dark:#1D4ED8;
  --c-primary-soft:#DBEAFE;
  --c-accent:#06B6D4;
  --c-accent-soft:#CFFAFE;
  --c-warm:#F59E0B;
  --c-warm-soft:#FEF3C7;
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FA;
  --c-text:#0F172A;
  --c-text-2:#475569;
  --c-text-3:#94A3B8;
  --c-border:#E2E8F0;
  --sh-1:0 1px 2px rgba(15,23,42,.05);
  --sh-2:0 8px 24px rgba(15,23,42,.07);
  --sh-3:0 16px 40px rgba(37,99,235,.14);
  --r-card:16px;
  --r-media:14px;
  --r-input:10px;
  --r-pill:999px;
  --sp-section:88px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --t:color .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
*,*::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(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:var(--t);}
a:hover{color:var(--c-primary-dark);}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,textarea,select{font-family:inherit;font-size:15px;color:var(--c-text);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
h1{font-size:40px;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
h2{font-size:30px;line-height:1.3;font-weight:700;}
h3{font-size:22px;line-height:1.4;font-weight:600;}
h4{font-size:18px;line-height:1.45;font-weight:600;}
p{line-height:1.85;}
:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:var(--sp-section) 0;}
.section-soft{background:var(--c-surface-2);}
.section-white{background:var(--c-surface);}

/* ============ 悬浮胶囊导航 ============ */
.site-header{
  position:fixed;
  top:16px;
  left:0;
  right:0;
  z-index:100;
  padding:0 24px;
  transition:var(--t);
}
.nav-shell{
  max-width:1140px;
  margin:0 auto;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border:1px solid var(--c-border);
  border-radius:var(--r-pill);
  box-shadow:var(--sh-2);
  transition:var(--t);
}
.site-header.is-scrolled .nav-shell{
  background:rgba(255,255,255,.96);
  box-shadow:0 12px 30px rgba(15,23,42,.12);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  padding:10px 12px 10px 20px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:var(--c-text);
  white-space:nowrap;
}
.brand:hover{color:var(--c-primary);}
.brand-mark{
  width:32px;
  height:32px;
  border-radius:10px;
  background:var(--c-primary);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  font-weight:700;
  letter-spacing:0;
  flex:0 0 32px;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:auto;
}
.nav-links > a:not(.btn){
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--c-text-2);
  padding:8px 4px;
  border-radius:8px;
}
.nav-links > a:not(.btn):hover{
  color:var(--c-primary);
  background:var(--c-primary-soft);
  padding-left:10px;
  padding-right:10px;
}
.nav-links > a:not(.btn).active{
  color:var(--c-primary);
  font-weight:600;
}
.nav-links > a:not(.btn).active::after{
  content:"";
  position:absolute;
  left:4px;
  right:4px;
  bottom:1px;
  height:2px;
  border-radius:2px;
  background:var(--c-primary);
}
.nav-cta{flex:0 0 auto;}
.nav-mobile-cta{display:none;}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:12px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  transition:var(--t);
}
.nav-toggle span{
  display:block;
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--c-text);
  transition:var(--t);
}
.nav-toggle:hover{background:var(--c-primary-soft);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  transition:var(--t);
  white-space:nowrap;
}
.btn-primary{
  background:var(--c-primary);
  color:#fff;
  box-shadow:0 6px 16px rgba(37,99,235,.22);
}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(1px);}
.btn-primary:active{transform:translateY(2px);}
.btn-secondary{
  background:var(--c-surface);
  color:var(--c-primary);
  border-color:var(--c-primary);
}
.btn-secondary:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.btn-ghost{
  background:rgba(255,255,255,.7);
  color:var(--c-text);
  border-color:var(--c-border);
}
.btn-ghost:hover{background:#fff;border-color:var(--c-primary-soft);color:var(--c-primary);}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}
.text-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--c-primary);
  min-height:44px;
}
.text-arrow svg{transition:transform .2s ease;}
.text-arrow:hover svg{transform:translateX(4px);}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:8px;
  font-size:12px;
  line-height:1.4;
  letter-spacing:.04em;
  font-weight:600;
}
.badge-primary{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.badge-accent{background:var(--c-accent-soft);color:#0E7490;}
.badge-warm{background:var(--c-warm-soft);color:#B45309;}
.badge-pill{border-radius:var(--r-pill);}

/* ============ 分类头区 ============ */
.page-head{
  position:relative;
  overflow:hidden;
  padding:150px 0 74px;
  background:linear-gradient(180deg,#EAF2FE 0%,#F7F9FC 100%);
  border-bottom:1px solid var(--c-border);
}
.page-head::before{
  content:"";
  position:absolute;
  inset:0 0 0 52%;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  opacity:.14;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 55%);
  mask-image:linear-gradient(90deg,transparent,#000 55%);
}
.page-head::after{
  content:"";
  position:absolute;
  right:-140px;
  top:-160px;
  width:460px;
  height:460px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(6,182,212,.18),rgba(6,182,212,0) 68%);
}
.page-head .container{position:relative;z-index:2;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--c-text-3);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--c-text-3);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:#CBD5E1;}
.breadcrumb .current{color:var(--c-text-2);}
.head-title-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
  margin-bottom:18px;
}
.head-title-row h1{max-width:820px;}
.page-head .lead{
  max-width:760px;
  font-size:17px;
  color:var(--c-text-2);
}
.head-meta{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
}
.head-meta span{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 14px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.78);
  border:1px solid var(--c-border);
  font-size:13px;
  color:var(--c-text-2);
  box-shadow:var(--sh-1);
}
.head-meta svg{color:var(--c-primary);}

/* ============ 通用标题组 ============ */
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:44px;
}
.section-head .eyebrow{
  display:block;
  font-size:12px;
  letter-spacing:.14em;
  font-weight:700;
  color:var(--c-primary);
  margin-bottom:10px;
}
.section-head h2{max-width:700px;}
.section-head .sub{
  font-size:14px;
  color:var(--c-text-3);
  max-width:360px;
}

/* ============ 功能模块网格 ============ */
.module-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.module-card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-2);
  padding:26px 24px 28px;
  transition:var(--t);
}
.module-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--sh-3);
  border-color:var(--c-primary-soft);
}
.module-icon{
  width:44px;
  height:44px;
  border-radius:12px;
  background:var(--c-primary-soft);
  color:var(--c-primary);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
}
.module-card:hover .module-icon{background:var(--c-primary);color:#fff;}
.module-card h3{font-size:18px;margin-bottom:10px;}
.module-card p{font-size:14px;color:var(--c-text-2);line-height:1.8;}
.module-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.module-tags span{
  font-size:12px;
  padding:4px 10px;
  border-radius:8px;
  background:var(--c-surface-2);
  color:var(--c-text-2);
}

/* ============ 图文交替 ============ */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.split + .split{margin-top:76px;}
.split.reverse .split-media{order:-1;}
.split-media{
  position:relative;
  border-radius:var(--r-media);
}
.split-media::before{
  content:"";
  position:absolute;
  inset:18px -18px -18px 18px;
  border:1px solid var(--c-primary-soft);
  border-radius:20px;
  z-index:0;
}
.split-media img{
  position:relative;
  z-index:1;
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-media);
  border:1px solid var(--c-border);
  box-shadow:var(--sh-3);
}
.split-body h2{margin-bottom:16px;font-size:28px;}
.split-body > p{color:var(--c-text-2);font-size:16px;margin-bottom:22px;}
.point-list{display:grid;gap:14px;}
.point-list li{
  display:flex;
  gap:12px;
  font-size:15px;
  color:var(--c-text-2);
  line-height:1.75;
}
.point-list li::before{
  content:"";
  flex:0 0 8px;
  width:8px;
  height:8px;
  margin-top:10px;
  border-radius:50%;
  background:var(--c-primary);
}
.point-list li strong{color:var(--c-text);font-weight:600;}

/* ============ 数据指标条 ============ */
.metrics{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:20px;
  box-shadow:var(--sh-2);
  overflow:hidden;
}
.metric{
  padding:32px 24px;
  text-align:center;
  border-left:1px solid var(--c-border);
}
.metric:first-child{border-left:0;}
.metric .num{
  display:block;
  font-size:32px;
  font-weight:700;
  line-height:1.2;
  color:var(--c-primary);
  letter-spacing:-.02em;
}
.metric .num small{font-size:15px;font-weight:600;margin-left:2px;}
.metric .label{
  display:block;
  margin-top:8px;
  font-size:12px;
  color:var(--c-text-3);
  letter-spacing:.04em;
}

/* ============ FAQ ============ */
.faq-layout{
  display:grid;
  grid-template-columns:32% 1fr;
  gap:56px;
  align-items:start;
}
.faq-side h2{margin-bottom:14px;}
.faq-side p{font-size:14px;color:var(--c-text-2);margin-bottom:22px;}
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:var(--c-surface-2);
  border:1px solid var(--c-border);
  border-radius:12px;
  overflow:hidden;
  transition:var(--t);
}
.faq-item.open{background:var(--c-surface);border-color:var(--c-primary-soft);box-shadow:var(--sh-2);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  text-align:left;
  padding:18px 20px;
  font-size:16px;
  font-weight:600;
  color:var(--c-text);
  min-height:44px;
}
.faq-q:hover{color:var(--c-primary);}
.faq-sign{
  flex:0 0 22px;
  width:22px;
  height:22px;
  position:relative;
}
.faq-sign::before,.faq-sign::after{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  background:var(--c-primary);
  border-radius:2px;
  transform:translate(-50%,-50%);
  transition:transform .2s ease;
}
.faq-sign::before{width:12px;height:2px;}
.faq-sign::after{width:2px;height:12px;}
.faq-item.open .faq-sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a-inner{
  padding:16px 20px 20px;
  border-top:1px solid var(--c-border);
  font-size:15px;
  color:var(--c-text-2);
  line-height:1.8;
}

/* ============ CTA ============ */
.cta-band{padding:0 0 var(--sp-section);}
.cta-card{
  position:relative;
  overflow:hidden;
  border-radius:24px;
  background:#EFF6FF;
  border:1px solid #CFE0FB;
  padding:60px 40px;
  text-align:center;
}
.cta-card::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(135deg,rgba(37,99,235,.06) 0 1px,transparent 1px 14px);
  opacity:.7;
}
.cta-card > *{position:relative;z-index:1;}
.cta-card h2{margin-bottom:14px;}
.cta-card p{
  max-width:640px;
  margin:0 auto 30px;
  color:var(--c-text-2);
  font-size:16px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}
.cta-corner{
  position:absolute;
  width:26px;
  height:26px;
  border:2px solid var(--c-primary);
  z-index:1;
}
.cta-corner.tl{top:16px;left:16px;border-right:0;border-bottom:0;border-radius:12px 0 0 0;}
.cta-corner.tr{top:16px;right:16px;border-left:0;border-bottom:0;border-radius:0 12px 0 0;}
.cta-corner.bl{bottom:16px;left:16px;border-right:0;border-top:0;border-radius:0 0 0 12px;}
.cta-corner.br{bottom:16px;right:16px;border-left:0;border-top:0;border-radius:0 0 12px 0;}

/* ============ 继续浏览 ============ */
.continue-nav{
  padding:0 0 56px;
  text-align:center;
  font-size:14px;
  color:var(--c-text-3);
}
.continue-nav a{
  color:var(--c-primary);
  font-weight:600;
  margin:0 4px;
}
.continue-nav a:hover{text-decoration:underline;}
.continue-nav .dot{margin:0 8px;color:#CBD5E1;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--c-surface);
  border-top:1px solid var(--c-border);
  padding:64px 0 28px;
}
.footer-top{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid var(--c-border);
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:var(--c-text);
  margin-bottom:16px;
}
.footer-desc{
  font-size:14px;
  color:var(--c-text-2);
  max-width:320px;
  line-height:1.8;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:var(--c-text);
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{
  font-size:14px;
  color:var(--c-text-2);
  display:inline-block;
}
.footer-col a:hover{color:var(--c-primary);transform:translateX(2px);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:24px;
  font-size:13px;
  color:var(--c-text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  :root{--sp-section:64px;}
  h1{font-size:32px;}
  h2{font-size:25px;}
  .container{padding:0 24px;}
  .nav-links{gap:18px;}
  .split{gap:44px;}
  .split + .split{margin-top:56px;}
  .faq-layout{grid-template-columns:1fr;gap:32px;}
  .module-grid{grid-template-columns:repeat(2,1fr);}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metric:nth-child(3){border-left:0;}
  .metric:nth-child(n+3){border-top:1px solid var(--c-border);}
}
@media (max-width:767px){
  :root{--sp-section:48px;}
  body{font-size:15px;}
  h1{font-size:26px;}
  h2{font-size:22px;}
  h3{font-size:18px;}
  .container{padding:0 16px;}
  .site-header{top:8px;padding:0 12px;}
  .nav-shell{border-radius:16px;}
  .nav-inner{padding:8px 8px 8px 14px;gap:12px;}
  .brand{font-size:16px;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-links{
    display:none;
    position:absolute;
    left:12px;
    right:12px;
    top:calc(100% + 8px);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:#fff;
    border:1px solid var(--c-border);
    border-radius:16px;
    box-shadow:var(--sh-3);
    padding:8px;
    margin-left:0;
  }
  .nav-links.is-open{display:flex;}
  .nav-links > a:not(.btn){
    display:flex;
    align-items:center;
    min-height:48px;
    padding:0 14px;
    border-bottom:1px solid var(--c-border);
    border-radius:0;
    font-size:15px;
  }
  .nav-links > a:not(.btn):last-of-type{border-bottom:0;}
  .nav-links > a:not(.btn).active::after{display:none;}
  .nav-links > a:not(.btn).active{background:var(--c-primary-soft);border-radius:10px;}
  .nav-links > a:not(.btn):hover{padding-left:14px;padding-right:14px;border-radius:10px;}
  .nav-mobile-cta{display:inline-flex;width:100%;margin-top:12px;}
  .nav-shell{position:relative;}
  .page-head{padding:122px 0 52px;}
  .page-head::before{inset:0;opacity:.1;}
  .page-head .lead{font-size:15px;}
  .module-grid{grid-template-columns:1fr;}
  .split{grid-template-columns:1fr;gap:28px;}
  .split.reverse .split-media{order:0;}
  .split-media::before{inset:12px -10px -10px 12px;}
  .split-media img{aspect-ratio:16/10;}
  .metrics{grid-template-columns:1fr;}
  .metric{border-left:0;border-top:1px solid var(--c-border);}
  .metric:first-child{border-top:0;}
  .cta-card{padding:40px 20px;border-radius:20px;}
  .cta-actions .btn{width:100%;}
  .footer-top{grid-template-columns:repeat(2,1fr);gap:28px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:420px){
  h1{font-size:23px;}
  .head-meta span{font-size:12px;}
  .footer-top{grid-template-columns:1fr;}
  .cta-corner{display:none;}
}

/* roulang page: article */
:root{
  --c-primary:#2563EB;
  --c-primary-dark:#1D4ED8;
  --c-primary-soft:#DBEAFE;
  --c-accent:#06B6D4;
  --c-accent-soft:#CFFAFE;
  --c-warm:#F59E0B;
  --c-warm-soft:#FEF3C7;
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FA;
  --c-text:#0F172A;
  --c-text-2:#475569;
  --c-text-3:#94A3B8;
  --c-border:#E2E8F0;
  --sh-1:0 1px 2px rgba(15,23,42,.05);
  --sh-2:0 8px 24px rgba(15,23,42,.07);
  --sh-3:0 16px 40px rgba(37,99,235,.14);
  --r-card:16px;
  --r-media:14px;
  --r-pill:999px;
  --r-input:10px;
  --r-tag:8px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,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:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease,border-color .2s ease,background .2s ease,transform .2s ease;}
a:hover{color:var(--c-primary-dark);}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding-left:0;list-style:none;}
:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 16px rgba(37,99,235,.22);}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(1px);}
.btn-primary:active{background:var(--c-primary-dark);transform:translateY(2px);}
.btn-secondary{background:#fff;color:var(--c-primary);border-color:#BFD4FA;}
.btn-secondary:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);border-color:var(--c-primary);}
.btn-ghost{background:transparent;color:var(--c-primary);border-color:transparent;}
.btn-ghost:hover{background:var(--c-primary-soft);}
.btn-text-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);}
.btn-text-arrow i{font-style:normal;transition:transform .2s ease;}
.btn-text-arrow:hover i{transform:translateX(4px);}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-tag);
  font-size:12px;font-weight:600;letter-spacing:.04em;line-height:1.4;
}
.badge-primary{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.badge-accent{background:var(--c-accent-soft);color:#0E7490;}
.badge-warm{background:var(--c-warm-soft);color:#B45309;}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  padding:16px 24px 0;transition:padding .2s ease;
}
.nav-shell{max-width:1140px;margin:0 auto;}
.nav-inner{
  position:relative;display:flex;align-items:center;gap:24px;
  padding:10px 12px 10px 18px;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border:1px solid var(--c-border);
  border-radius:var(--r-pill);
  box-shadow:var(--sh-2);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header.scrolled .nav-inner{background:rgba(255,255,255,.96);box-shadow:var(--sh-3);}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-text);letter-spacing:.01em;}
.brand:hover{color:var(--c-text);}
.brand-mark{
  width:32px;height:32px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
  color:#fff;font-size:15px;font-weight:700;flex:none;
}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--c-text-2);
  padding:6px 10px;border-radius:var(--r-pill);
}
.nav-links a:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);
  width:0;height:2px;border-radius:2px;background:var(--c-primary);transition:width .2s ease;
}
.nav-links a:hover::after{width:16px;}
.nav-links a.active{color:var(--c-primary);}
.nav-links a.active::after{width:18px;}
.nav-cta{margin-left:4px;height:42px;padding:0 20px;}
.nav-mobile-cta{display:none;}
.nav-toggle{
  display:none;width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background:#fff;border:1px solid var(--c-border);border-radius:14px;cursor:pointer;flex:none;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-text);transition:transform .2s ease,opacity .2s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 文章头区 ---------- */
.article-hero{
  position:relative;overflow:hidden;
  padding:132px 0 56px;
  background:linear-gradient(180deg,#EAF2FE 0%,#F7F9FC 100%);
  border-bottom:1px solid var(--c-border);
}
.article-hero::after{
  content:"";position:absolute;right:-8%;top:-30%;width:54%;height:170%;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.12;border-radius:0 0 0 60%;pointer-events:none;
}
.article-hero .container{position:relative;z-index:1;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:20px;}
.crumb a{color:var(--c-text-3);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:#CBD5E1;}
.crumb .current{color:var(--c-text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60%;}
.article-hero h1{
  font-size:34px;line-height:1.35;font-weight:700;color:var(--c-text);
  max-width:860px;margin-bottom:20px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13px;color:var(--c-text-3);}
.meta-sep{width:1px;height:12px;background:var(--c-border);display:inline-block;}
.article-meta .meta-tag{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--r-tag);
  background:var(--c-primary-soft);color:var(--c-primary-dark);font-size:12px;font-weight:600;letter-spacing:.04em;
}

/* ---------- 正文布局 ---------- */
.article-main{padding:64px 0 72px;}
.article-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:40px;align-items:start;}
.article-panel{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:44px 44px 48px;
}
.article-body{font-size:17px;line-height:1.9;color:var(--c-text-2);max-width:720px;}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.15em;}
.article-body h2{
  position:relative;font-size:26px;line-height:1.4;font-weight:700;color:var(--c-text);
  margin:40px 0 16px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.26em;bottom:.26em;width:4px;border-radius:2px;background:var(--c-primary);
}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;color:var(--c-text);margin:30px 0 12px;}
.article-body h4{font-size:18px;font-weight:600;color:var(--c-text);margin:22px 0 10px;}
.article-body a{color:var(--c-primary);border-bottom:1px solid var(--c-primary-soft);}
.article-body a:hover{border-bottom-color:var(--c-primary);}
.article-body ul,.article-body ol{margin:0 0 1.15em;padding-left:1.2em;}
.article-body ul li,.article-body ol li{position:relative;margin-bottom:.5em;padding-left:.4em;list-style:none;}
.article-body ul li::before{
  content:"";position:absolute;left:-.9em;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--c-primary);
}
.article-body ol{counter-reset:cms-ol;}
.article-body ol li{counter-increment:cms-ol;}
.article-body ol li::before{
  content:counter(cms-ol);position:absolute;left:-1.5em;top:.28em;
  width:20px;height:20px;border-radius:6px;background:var(--c-primary-soft);color:var(--c-primary-dark);
  font-size:12px;font-weight:700;line-height:20px;text-align:center;
}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:#F4F8FF;border-left:4px solid var(--c-primary);
  border-radius:0 12px 12px 0;color:var(--c-text-2);font-size:15px;line-height:1.85;
}
.article-body img{width:100%;border-radius:var(--r-media);border:1px solid var(--c-border);margin:22px 0;}
.article-body figure{margin:22px 0;}
.article-body figcaption{font-size:13px;color:var(--c-text-3);text-align:center;margin-top:10px;}
.article-body table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:22px 0;
  border:1px solid var(--c-border);border-radius:12px;font-size:15px;
}
.article-body th,.article-body td{padding:10px 14px;border-bottom:1px solid var(--c-border);text-align:left;white-space:nowrap;}
.article-body th{background:var(--c-surface-2);color:var(--c-text);font-weight:600;}
.article-body pre{
  background:#0F172A;color:#E2E8F0;padding:18px 20px;border-radius:12px;
  overflow-x:auto;font-size:14px;line-height:1.7;margin:22px 0;
}
.article-body code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.95em;}
.article-body hr{border:0;border-top:1px solid var(--c-border);margin:32px 0;}
.article-empty{
  text-align:center;padding:52px 28px;border:1px dashed #C7D6EC;border-radius:var(--r-card);
  background:var(--c-surface-2);
}
.article-empty .empty-icon{
  width:52px;height:52px;margin:0 auto 18px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--c-border);color:var(--c-primary);
}
.article-empty .empty-icon svg{width:24px;height:24px;}
.article-empty h2{font-size:20px;font-weight:700;color:var(--c-text);margin-bottom:8px;}
.article-empty p{font-size:15px;color:var(--c-text-2);margin-bottom:22px;}

/* ---------- 侧栏 ---------- */
.side-col{position:sticky;top:112px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-2);padding:22px 22px 24px;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
}
.side-card:hover{box-shadow:var(--sh-3);border-color:var(--c-primary-soft);}
.side-card h3{font-size:15px;font-weight:700;color:var(--c-text);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--c-primary);}
.source-row{display:flex;align-items:center;gap:12px;}
.source-avatar{
  width:42px;height:42px;border-radius:12px;flex:none;
  background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
  color:#fff;font-weight:700;font-size:16px;
  display:flex;align-items:center;justify-content:center;
}
.source-name{font-size:14px;font-weight:600;color:var(--c-text);}
.source-desc{font-size:12px;color:var(--c-text-3);line-height:1.6;}
.tag-group{display:flex;flex-wrap:wrap;gap:8px;}
.tag-group a{
  display:inline-flex;padding:5px 12px;border-radius:var(--r-tag);
  background:var(--c-surface-2);color:var(--c-text-2);font-size:12px;font-weight:600;letter-spacing:.04em;
}
.tag-group a:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.hot-list li{display:flex;gap:12px;padding:11px 0;border-bottom:1px solid var(--c-border);}
.hot-list li:last-child{border-bottom:0;padding-bottom:0;}
.hot-list li:first-child{padding-top:0;}
.hot-index{
  width:22px;height:22px;border-radius:7px;flex:none;margin-top:3px;
  display:flex;align-items:center;justify-content:center;
  background:var(--c-primary-soft);color:var(--c-primary-dark);font-size:12px;font-weight:700;
}
.hot-list a{font-size:14px;line-height:1.6;color:var(--c-text-2);}
.hot-list a:hover{color:var(--c-primary);}

/* ---------- 相关推荐 ---------- */
.related-section{padding:0 0 72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;}
.section-head h2{font-size:26px;font-weight:700;color:var(--c-text);line-height:1.3;}
.section-head p{font-size:14px;color:var(--c-text-3);margin-top:6px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;background:var(--c-surface);
  border:1px solid var(--c-border);border-radius:var(--r-card);box-shadow:var(--sh-2);
  overflow:hidden;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:var(--c-primary-soft);}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-surface-2);}
.card-media img{width:100%;height:100%;object-fit:cover;}
.card-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17px;line-height:1.55;font-weight:600;color:var(--c-text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card:hover .card-body h3{color:var(--c-primary);}
.card-body p{font-size:14px;line-height:1.75;color:var(--c-text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--c-text-3);margin-top:auto;}
.card-foot .card-cat{padding:4px 10px;border-radius:var(--r-tag);background:var(--c-surface-2);color:var(--c-text-2);font-weight:600;letter-spacing:.04em;}
.back-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:16px;margin-top:40px;}

/* ---------- 底部 CTA ---------- */
.cta-section{padding:0 0 88px;}
.cta-box{
  position:relative;overflow:hidden;text-align:center;
  background:#EFF6FF;border:1px solid #D8E6FC;border-radius:24px;
  padding:52px 32px;box-shadow:var(--sh-2);
}
.cta-box::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(135deg,rgba(37,99,235,.06) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-box > *{position:relative;z-index:1;}
.cta-box h2{font-size:28px;font-weight:700;color:var(--c-text);margin-bottom:12px;}
.cta-box p{font-size:16px;color:var(--c-text-2);max-width:640px;margin:0 auto 26px;}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{background:#0F172A;color:#CBD5E1;padding:64px 0 28px;}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(226,232,240,.14);}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-desc{font-size:14px;line-height:1.8;color:#94A3B8;max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:#94A3B8;transition:color .2s ease,padding .2s ease;}
.footer-col a:hover{color:#fff;padding-left:2px;}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;padding-top:22px;font-size:13px;color:#7C8AA0;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .site-header{padding:12px 12px 0;}
  .nav-inner{padding:8px 10px 8px 14px;border-radius:16px;gap:12px;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .nav-links{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border:1px solid var(--c-border);border-radius:16px;
    box-shadow:var(--sh-3);padding:8px;
    max-height:0;opacity:0;visibility:hidden;overflow:hidden;
    transition:max-height .28s ease,opacity .2s ease,visibility .2s ease;
  }
  .nav-links.is-open{max-height:460px;opacity:1;visibility:visible;}
  .nav-links a{padding:14px 12px;border-radius:12px;border-bottom:1px solid var(--c-border);font-size:15px;}
  .nav-links a::after{display:none;}
  .nav-links a:last-of-type{border-bottom:0;}
  .nav-mobile-cta{display:inline-flex;margin-top:8px;height:46px;width:100%;}
  .article-hero{padding:112px 0 44px;}
  .article-hero h1{font-size:28px;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .article-panel{padding:32px 28px 36px;}
  .side-col{position:static;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-desc{max-width:none;}
}
@media (max-width:767px){
  body{font-size:15.5px;}
  .container{padding:0 16px;}
  .article-hero{padding:104px 0 36px;}
  .article-hero::after{width:80%;right:-20%;opacity:.1;}
  .article-hero h1{font-size:23px;margin-bottom:16px;}
  .crumb .current{max-width:56%;}
  .article-main{padding:40px 0 56px;}
  .article-panel{padding:24px 20px 28px;}
  .article-body{font-size:16px;line-height:1.85;}
  .article-body h2{font-size:21px;margin:30px 0 12px;}
  .article-body h3{font-size:18px;}
  .related-grid{grid-template-columns:minmax(0,1fr);gap:18px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px;}
  .section-head h2{font-size:22px;}
  .cta-section{padding:0 0 56px;}
  .cta-box{padding:36px 20px;border-radius:20px;}
  .cta-box h2{font-size:22px;}
  .cta-box p{font-size:15px;}
  .cta-actions .btn{width:100%;}
  .back-row .btn{width:100%;}
  .footer-top{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:420px){
  .brand span:last-child{font-size:15px;}
  .article-hero h1{font-size:20px;}
}

/* roulang page: category2 */
:root{
  --c-primary:#2563EB;
  --c-primary-dark:#1D4ED8;
  --c-primary-soft:#DBEAFE;
  --c-accent:#06B6D4;
  --c-warm:#F59E0B;
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FA;
  --c-text:#0F172A;
  --c-text-2:#475569;
  --c-text-3:#94A3B8;
  --c-border:#E2E8F0;
  --sh-1:0 1px 2px rgba(15,23,42,.05);
  --sh-2:0 8px 24px rgba(15,23,42,.07);
  --sh-3:0 16px 40px rgba(37,99,235,.14);
  --r-card:16px;
  --r-media:14px;
  --r-input:10px;
  --r-badge:8px;
  --sp-section:88px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,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:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:var(--c-primary);text-decoration:none;transition:color 200ms ease,background 200ms ease,border-color 200ms ease,transform 200ms ease}
a:hover{color:var(--c-primary-dark)}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:var(--sp-section) 0}
.section-alt{background:var(--c-surface-2)}

/* ---------- 导航 ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:80;padding:16px 0 0;transition:padding 220ms ease}
.nav-shell{max-width:1140px;margin:0 auto;padding:0 16px}
.nav-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:18px;
  padding:10px 12px 10px 18px;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border:1px solid var(--c-border);
  border-radius:999px;
  box-shadow:var(--sh-2);
  transition:background 220ms ease,box-shadow 220ms ease;
}
.site-header.is-scrolled .nav-inner{background:rgba(255,255,255,.96);box-shadow:var(--sh-3)}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-text);letter-spacing:.01em}
.brand:hover{color:var(--c-primary)}
.brand-mark{
  width:32px;height:32px;flex:0 0 32px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-primary);color:#fff;
  border-radius:10px;font-size:15px;font-weight:700;letter-spacing:0;
}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{
  position:relative;
  font-size:15px;font-weight:500;color:var(--c-text-2);
  padding:8px 12px;border-radius:999px;
}
.nav-links a:hover{color:var(--c-primary);background:var(--c-primary-soft)}
.nav-links a.active{color:var(--c-primary);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;bottom:1px;
  width:18px;height:2px;border-radius:2px;background:var(--c-primary);
  transform:translateX(-50%);
}
.nav-cta{margin-left:6px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;
  transition:background 200ms ease,color 200ms ease,border-color 200ms ease,box-shadow 200ms ease,transform 200ms ease;
  cursor:pointer;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:0 6px 18px rgba(37,99,235,.22)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;transform:translateY(1px);box-shadow:0 10px 24px rgba(37,99,235,.28)}
.btn-primary:active{transform:translateY(2px);box-shadow:0 4px 12px rgba(37,99,235,.2)}
.btn-secondary{background:#fff;color:var(--c-primary);border-color:#BFD6FB}
.btn-secondary:hover{background:var(--c-primary-soft);color:var(--c-primary-dark);border-color:var(--c-primary)}
.btn-ghost{background:var(--c-surface-2);color:var(--c-text-2)}
.btn-ghost:hover{background:var(--c-primary-soft);color:var(--c-primary-dark)}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-primary);padding:6px 2px}
.btn-text::after{content:"→";transition:transform 200ms ease}
.btn-text:hover::after{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.5;pointer-events:none;box-shadow:none}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  margin-left:auto;border:1px solid var(--c-border);background:#fff;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--c-text);transition:transform 200ms ease,opacity 200ms ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-mobile-cta{display:none}

/* ---------- 分类头区 ---------- */
.page-main{padding-top:118px}
.cat-hero{
  position:relative;overflow:hidden;
  padding:34px 0 58px;
  background:linear-gradient(135deg,#EAF2FE 0%,#F7F9FC 62%,#F7F9FC 100%);
  border-bottom:1px solid var(--c-border);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:right center;
  opacity:.14;pointer-events:none;
  mask-image:linear-gradient(to left,rgba(0,0,0,.9) 0%,rgba(0,0,0,0) 62%);
  -webkit-mask-image:linear-gradient(to left,rgba(0,0,0,.9) 0%,rgba(0,0,0,0) 62%);
}
.cat-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:18px}
.breadcrumb a{color:var(--c-text-2)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:#CBD5E1}
.cat-head{display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.cat-title{font-size:40px;line-height:1.25;font-weight:700;letter-spacing:.01em;max-width:22em}
.cat-title .cat-brand{color:var(--c-primary);margin-right:12px}
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--r-badge);font-size:12px;line-height:1.4;letter-spacing:.04em;font-weight:600}
.badge-primary{background:var(--c-primary-soft);color:var(--c-primary-dark)}
.badge-accent{background:#CFFAFE;color:#0E7490}
.badge-warm{background:#FEF3C7;color:#B45309}
.cat-desc{margin-top:16px;max-width:56em;font-size:17px;line-height:1.9;color:var(--c-text-2)}

/* ---------- 指标条 ---------- */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:34px;background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;
}
.metric{padding:20px 22px;border-right:1px solid var(--c-border)}
.metric:last-child{border-right:0}
.metric-num{font-size:32px;font-weight:700;color:var(--c-primary);line-height:1.2}
.metric-num em{font-style:normal;font-size:15px;color:var(--c-text-3);margin-left:4px;font-weight:500}
.metric-label{font-size:12px;color:var(--c-text-3);letter-spacing:.04em;margin-top:6px}

/* ---------- 通用板块头 ---------- */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:40px}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700}
.section-head .sub{font-size:14px;color:var(--c-text-3);max-width:34em}
.section-lead{margin-top:12px;font-size:16px;color:var(--c-text-2);max-width:52em}

/* ---------- 行业图文卡 ---------- */
.media-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.media-card{
  display:flex;flex-direction:column;
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-card);box-shadow:var(--sh-2);overflow:hidden;
  transition:transform 220ms ease,box-shadow 220ms ease,border-color 220ms ease;
}
.media-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:var(--c-primary-soft)}
.media-thumb{position:relative;aspect-ratio:16/9;background:var(--c-surface-2);overflow:hidden}
.media-thumb img{width:100%;height:100%;object-fit:cover;border-bottom:1px solid var(--c-border)}
.media-body{padding:22px 24px 24px}
.media-body h3{font-size:22px;line-height:1.4;font-weight:600;margin-bottom:10px}
.media-body p{font-size:15px;color:var(--c-text-2);line-height:1.8}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--r-badge);font-size:12px;letter-spacing:.04em;background:var(--c-surface-2);color:var(--c-text-2);border:1px solid var(--c-border)}
.tag-primary{background:var(--c-primary-soft);color:var(--c-primary-dark);border-color:#C7DDFC}
.tag-accent{background:#CFFAFE;color:#0E7490;border-color:#A5F3FC}

/* ---------- 路径对照 ---------- */
.compare-grid{display:grid;grid-template-columns:1fr 1px 1fr;gap:0;align-items:stretch}
.compare-divider{background:repeating-linear-gradient(to bottom,var(--c-border) 0 8px,transparent 8px 16px);width:1px}
.compare-card{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);
  box-shadow:var(--sh-1);padding:28px 28px 26px;margin:0 28px;
  transition:box-shadow 220ms ease,border-color 220ms ease,transform 220ms ease;
}
.compare-card:hover{box-shadow:var(--sh-2);border-color:var(--c-primary-soft);transform:translateY(-2px)}
.compare-card h3{font-size:22px;font-weight:600;line-height:1.4;margin-bottom:8px}
.compare-note{font-size:14px;color:var(--c-text-3);margin-bottom:16px}
.compare-card p{font-size:15px;color:var(--c-text-2);line-height:1.85}
.point-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.point-list li{position:relative;padding-left:20px;font-size:15px;color:var(--c-text-2);line-height:1.7}
.point-list li::before{
  content:"";position:absolute;left:2px;top:10px;
  width:7px;height:7px;border-radius:50%;background:var(--c-primary);
}
.point-list.accent li::before{background:var(--c-accent)}

/* ---------- 折叠说明 ---------- */
.acc-list{display:flex;flex-direction:column;gap:14px;max-width:920px}
.acc-item{
  background:var(--c-surface);border:1px solid var(--c-border);border-radius:12px;
  box-shadow:var(--sh-1);overflow:hidden;transition:border-color 200ms ease,box-shadow 200ms ease;
}
.acc-item[open]{border-color:var(--c-primary-soft);box-shadow:var(--sh-2)}
.acc-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--c-text);
}
.acc-item summary::-webkit-details-marker{display:none}
.acc-item summary::after{
  content:"+";flex:0 0 auto;font-size:20px;font-weight:500;color:var(--c-primary);
  transition:transform 220ms ease;line-height:1;
}
.acc-item[open] summary::after{transform:rotate(45deg)}
.acc-item summary:hover{background:#FAFCFF}
.acc-body{padding:0 22px 20px;border-top:1px solid var(--c-border);margin-top:0}
.acc-body p{padding-top:16px;font-size:15px;line-height:1.85;color:var(--c-text-2)}

/* ---------- 相关入口链 ---------- */
.link-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:15px;color:var(--c-text-2)}
.link-row .label{color:var(--c-text-3);font-size:14px}
.link-row a{font-weight:600;color:var(--c-primary)}
.link-row .dot{width:4px;height:4px;border-radius:50%;background:#CBD5E1}

/* ---------- CTA ---------- */
.cta-card{
  position:relative;overflow:hidden;
  background:#EFF6FF;border:1px solid #D6E6FF;border-radius:24px;
  padding:56px 40px;text-align:center;box-shadow:var(--sh-2);
}
.cta-card::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(135deg,rgba(37,99,235,.05) 0 2px,transparent 2px 14px);
  pointer-events:none;
}
.cta-card > *{position:relative;z-index:1}
.cta-card h2{font-size:30px;line-height:1.3;font-weight:700}
.cta-card p{margin-top:14px;font-size:16px;color:var(--c-text-2);max-width:44em;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--c-border);padding:64px 0 28px;margin-top:var(--sp-section)}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-desc{font-size:14px;color:var(--c-text-2);line-height:1.8;max-width:30em}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:14px;color:var(--c-text)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text-2);display:inline-block}
.footer-col a:hover{color:var(--c-primary);transform:translateX(2px)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--c-border);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--c-text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 24px}
}
@media (max-width:1023px){
  :root{--sp-section:64px}
  .cat-title{font-size:34px}
  .section-head h2{font-size:26px}
  .media-body h3,.compare-card h3{font-size:20px}
  .metric-strip{grid-template-columns:repeat(2,1fr)}
  .metric:nth-child(2){border-right:0}
  .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--c-border)}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .nav-links{
    position:absolute;top:calc(100% + 12px);left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border:1px solid var(--c-border);border-radius:16px;
    box-shadow:var(--sh-3);padding:8px;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 14px;border-radius:12px;min-height:48px;display:flex;align-items:center;border-bottom:1px solid var(--c-border)}
  .nav-links a:last-child{border-bottom:0}
  .nav-links a.active::after{display:none}
  .nav-links a.active{background:var(--c-primary-soft)}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .nav-mobile-cta{display:flex;justify-content:center;color:#fff !important;margin-top:8px}
  .nav-mobile-cta:hover{color:#fff;background:var(--c-primary-dark)}
  .compare-grid{grid-template-columns:1fr}
  .compare-divider{width:auto;height:1px;background:repeating-linear-gradient(to right,var(--c-border) 0 8px,transparent 8px 16px);margin:6px 0}
  .compare-card{margin:0}
  .media-grid{grid-template-columns:1fr}
}
@media (max-width:767px){
  :root{--sp-section:48px}
  body{font-size:15px}
  .container{padding:0 16px}
  .site-header{padding-top:10px}
  .nav-shell{padding:0 12px}
  .nav-inner{border-radius:16px;padding:8px 10px 8px 14px}
  .brand{font-size:15px}
  .page-main{padding-top:96px}
  .cat-hero{padding:22px 0 40px}
  .cat-title{font-size:27px}
  .cat-title .cat-brand{display:block;margin:0 0 6px}
  .cat-desc{font-size:15px}
  .metric-strip{grid-template-columns:1fr}
  .metric{border-right:0;border-bottom:1px solid var(--c-border)}
  .metric:last-child{border-bottom:0}
  .section-head h2{font-size:22px}
  .cta-card{padding:36px 22px;border-radius:20px}
  .cta-card h2{font-size:22px}
  .cta-actions .btn{width:100%}
  .footer-top{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:420px){
  .cat-title{font-size:24px}
  .media-body{padding:18px}
  .acc-item summary{font-size:15px;padding:16px}
}

/* roulang page: category3 */
:root{
  --c-primary:#2563EB;
  --c-primary-dark:#1D4ED8;
  --c-primary-soft:#DBEAFE;
  --c-accent:#06B6D4;
  --c-accent-soft:#CFFAFE;
  --c-warm:#F59E0B;
  --c-warm-soft:#FEF3C7;
  --c-bg:#F7F9FC;
  --c-surface:#FFFFFF;
  --c-surface-2:#EEF3FA;
  --c-text:#0F172A;
  --c-text-2:#475569;
  --c-text-3:#94A3B8;
  --c-border:#E2E8F0;
  --sh-1:0 1px 2px rgba(15,23,42,.05);
  --sh-2:0 8px 24px rgba(15,23,42,.07);
  --sh-3:0 16px 40px rgba(37,99,235,.14);
  --r-card:16px;
  --r-media:14px;
  --r-input:10px;
  --r-tag:8px;
  --sec:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-media);}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
h1{font-size:40px;line-height:1.25;font-weight:700;}
h2{font-size:30px;line-height:1.3;font-weight:700;}
h3{font-size:22px;line-height:1.4;font-weight:600;}
h4{font-size:18px;line-height:1.45;font-weight:600;}
p{color:var(--c-text-2);}
::selection{background:var(--c-primary-soft);color:var(--c-primary-dark);}
:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:2px;}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--c-primary);color:#fff;padding:10px 18px;border-radius:0 0 12px 0;font-size:14px;
}
.skip-link:focus{left:0;}
.container{max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:var(--sec) 0;}
.section-alt{background:var(--c-surface-2);}
.section-head{margin-bottom:40px;max-width:760px;}
.section-head h2{margin-bottom:12px;}
.section-head .lead{font-size:16px;color:var(--c-text-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:.04em;line-height:1.4;
  color:var(--c-primary);background:var(--c-primary-soft);
  border-radius:var(--r-tag);padding:5px 10px;margin-bottom:14px;font-weight:600;
}
.eyebrow.alt{color:#0E7490;background:var(--c-accent-soft);}
.eyebrow.warm{color:#B45309;background:var(--c-warm-soft);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:12px 22px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;line-height:1.4;
  transition:background-color 200ms ease,color 200ms ease,border-color 200ms ease,transform 200ms ease,box-shadow 200ms ease;
}
.btn-primary{background:var(--c-primary);color:#fff;border-color:var(--c-primary);box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--c-primary-dark);border-color:var(--c-primary-dark);transform:translateY(1px);}
.btn-secondary{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-secondary:hover{background:var(--c-primary-soft);}
.btn-ghost{background:transparent;color:var(--c-text-2);border-color:var(--c-border);}
.btn-ghost:hover{color:var(--c-primary);border-color:var(--c-primary-soft);background:#fff;}
.btn-text{background:none;border:none;padding:6px 0;color:var(--c-primary);font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px;cursor:pointer;}
.btn-text .arrow{transition:transform 200ms ease;display:inline-block;}
.btn-text:hover .arrow{transform:translateX(4px);}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-block{width:100%;}

/* ============ 徽章 / 标签 ============ */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;line-height:1.4;border-radius:999px;padding:5px 12px;font-weight:600;}
.badge-primary{background:var(--c-primary-soft);color:var(--c-primary-dark);}
.badge-accent{background:var(--c-accent-soft);color:#0E7490;}
.badge-warm{background:var(--c-warm-soft);color:#B45309;}
.tag{display:inline-flex;align-items:center;font-size:12px;line-height:1.4;letter-spacing:.04em;border-radius:var(--r-tag);padding:4px 8px;background:var(--c-surface-2);color:var(--c-text-2);border:1px solid var(--c-border);}
.tag-accent{background:var(--c-accent-soft);color:#0E7490;border-color:#A5F3FC;}

/* ============ 导航 ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:120;padding:16px 24px 0;}
.nav-shell{max-width:1140px;margin:0 auto;position:relative;}
.nav-inner{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border:1px solid var(--c-border);border-radius:999px;
  box-shadow:var(--sh-2);padding:10px 12px 10px 18px;
  transition:background-color 200ms ease,box-shadow 200ms ease;
}
body.is-scrolled .nav-inner{background:rgba(255,255,255,.96);box-shadow:var(--sh-3);}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c-text);letter-spacing:.01em;}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--c-primary);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;flex:none;
}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links>a{
  position:relative;font-size:15px;font-weight:500;color:var(--c-text-2);
  padding:8px 12px;border-radius:999px;transition:color 200ms ease,background-color 200ms ease;
}
.nav-links>a:hover{color:var(--c-primary);background:var(--c-primary-soft);}
.nav-links>a.active{color:var(--c-primary);font-weight:600;}
.nav-links>a.active::after{
  content:"";position:absolute;left:50%;bottom:2px;width:18px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:translateX(-50%);
}
.nav-cta{flex:none;}
.nav-mobile-cta{display:none;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--c-border);
  background:#fff;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;flex:none;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-text);transition:transform 220ms ease,opacity 220ms ease;}

/* ============ 分类头区 ============ */
.cat-hero{
  position:relative;overflow:hidden;
  padding:158px 0 76px;
  background:linear-gradient(180deg,#EAF2FE 0%,#F7F9FC 100%);
  border-bottom:1px solid var(--c-border);
}
.cat-hero::after{
  content:"";position:absolute;top:-40px;right:-6%;width:56%;height:130%;
  background:url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  opacity:.14;border-radius:40% 0 0 40%;pointer-events:none;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 45%);mask-image:linear-gradient(90deg,transparent,#000 45%);
}
.cat-hero .container{position:relative;z-index:2;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-text-3);margin-bottom:18px;}
.crumb a{color:var(--c-text-2);transition:color 200ms ease;}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:var(--c-text-3);}
.crumb .current{color:var(--c-text-2);}
.hero-title-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:18px;}
.hero-title-row h1{max-width:760px;}
.hero-sub{max-width:720px;font-size:18px;line-height:1.85;color:var(--c-text-2);margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.trust-row{display:flex;flex-wrap:wrap;gap:12px 28px;}
.trust-item{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--c-text-2);}
.trust-item svg{width:16px;height:16px;stroke:var(--c-primary);fill:none;stroke-width:1.8;flex:none;}

/* ============ 时间线 ============ */
.timeline{position:relative;margin-top:8px;}
.tl-item{position:relative;display:grid;grid-template-columns:44px 1fr;gap:20px;padding-bottom:34px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:21px;top:46px;bottom:2px;border-left:1px dashed var(--c-border);
}
.tl-item:last-child::before{display:none;}
.tl-dot{
  width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--c-primary-soft);
  color:var(--c-primary);font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-1);position:relative;z-index:1;
}
.tl-dot.is-current{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.tl-body{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:22px 26px;box-shadow:var(--sh-1);transition:transform 220ms ease,box-shadow 220ms ease,border-color 220ms ease;}
.tl-body:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:var(--c-primary-soft);}
.tl-body h3{margin-bottom:8px;font-size:19px;}
.tl-body p{font-size:15px;line-height:1.85;}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}

/* ============ 横条卡 ============ */
.strip-list{display:flex;flex-direction:column;gap:16px;}
.strip-card{
  display:flex;gap:18px;align-items:flex-start;background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-card);padding:22px 26px;box-shadow:var(--sh-1);
  transition:transform 220ms ease,box-shadow 220ms ease,border-color 220ms ease;
}
.strip-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:var(--c-primary-soft);}
.strip-icon{
  width:44px;height:44px;border-radius:12px;background:var(--c-primary-soft);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;flex:none;
}
.strip-icon svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;}
.strip-body h3{font-size:18px;margin-bottom:6px;}
.strip-body p{font-size:15px;line-height:1.85;}

/* ============ 图文说明 ============ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;}
.media-frame{position:relative;}
.media-frame img{width:100%;height:340px;object-fit:cover;border:1px solid var(--c-border);box-shadow:var(--sh-2);}
.media-frame::before{
  content:"";position:absolute;left:-14px;top:18px;width:120px;height:120px;border-radius:20px;
  border:2px solid var(--c-primary-soft);z-index:-1;
}
.media-caption{font-size:13px;color:var(--c-text-3);margin-top:12px;text-align:center;}
.check-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--c-text-2);line-height:1.8;}
.check-list li::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--c-primary);flex:none;margin-top:11px;
}

/* ============ 信息概览 ============ */
.stat-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
}
.stat-cell{padding:30px 26px;border-right:1px solid var(--c-border);}
.stat-cell:last-child{border-right:none;}
.stat-num{font-size:32px;line-height:1.2;font-weight:700;color:var(--c-primary);margin-bottom:6px;}
.stat-label{font-size:12px;letter-spacing:.04em;color:var(--c-text-3);margin-bottom:10px;}
.stat-text{font-size:14px;line-height:1.75;color:var(--c-text-2);}

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start;}
.faq-aside{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-2);}
.faq-aside h2{margin-bottom:12px;}
.faq-aside p{font-size:15px;}
.faq-aside .btn{margin-top:20px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{background:var(--c-surface-2);border:1px solid var(--c-border);border-radius:12px;transition:border-color 200ms ease,background-color 200ms ease;}
.faq-item[open]{background:#fff;border-color:var(--c-primary-soft);box-shadow:var(--sh-1);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--c-text);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  width:24px;height:24px;border-radius:8px;background:#fff;border:1px solid var(--c-border);
  color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;
  flex:none;transition:transform 220ms ease,background-color 200ms ease;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--c-primary-soft);}
.faq-body{padding:0 22px 20px;border-top:1px solid var(--c-border);padding-top:16px;font-size:15px;line-height:1.85;color:var(--c-text-2);}

/* ============ 表单 ============ */
.form-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start;}
.form-card{background:#fff;border:1px solid var(--c-border);border-radius:var(--r-card);padding:32px;box-shadow:var(--sh-2);}
.field{margin-bottom:20px;}
.field label{display:block;font-size:14px;font-weight:600;color:var(--c-text);margin-bottom:8px;}
.field .req{color:#DC2626;margin-left:4px;}
.input,.textarea{
  width:100%;border:1px solid var(--c-border);background:var(--c-surface-2);
  border-radius:var(--r-input);padding:12px 14px;font-size:15px;line-height:1.6;
  transition:border-color 200ms ease,box-shadow 200ms ease,background-color 200ms ease;
}
.input::placeholder,.textarea::placeholder{color:var(--c-text-3);}
.input:focus,.textarea:focus{
  outline:none;background:#fff;border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(37,99,235,.16);
}
.textarea{min-height:130px;resize:vertical;}
.field.has-error .input,.field.has-error .textarea{border-color:#FCA5A5;}
.field-hint{font-size:12px;color:var(--c-text-3);margin-top:6px;line-height:1.6;}
.form-note{display:flex;gap:10px;align-items:flex-start;padding:14px 16px;border-radius:12px;font-size:14px;line-height:1.7;margin-bottom:20px;}
.form-note.success{background:#ECFDF5;border:1px solid #A7F3D0;color:#047857;}
.form-note.error{background:#FEF2F2;border:1px solid #FECACA;color:#B91C1C;}
.form-side-list{display:flex;flex-direction:column;gap:18px;margin-top:24px;}
.form-side-item{display:flex;gap:14px;align-items:flex-start;}
.form-side-item .num{
  width:28px;height:28px;border-radius:9px;background:var(--c-primary-soft);color:var(--c-primary-dark);
  font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:none;
}
.form-side-item h4{font-size:16px;margin-bottom:4px;}
.form-side-item p{font-size:14px;line-height:1.75;}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;background:#EFF6FF;border-radius:24px;
  padding:56px 48px;text-align:center;border:1px solid #DBEAFE;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(135deg,rgba(37,99,235,.05) 0 1px,transparent 1px 14px);
  pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;width:22px;height:22px;left:26px;top:26px;
  border-left:2px solid var(--c-primary);border-top:2px solid var(--c-primary);border-radius:6px 0 0 0;opacity:.55;
}
.cta-band h2{margin-bottom:12px;position:relative;z-index:1;}
.cta-band p{max-width:640px;margin:0 auto 26px;font-size:16px;position:relative;z-index:1;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;position:relative;z-index:1;}

/* ============ 继续浏览 ============ */
.more-links{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;
  border-top:1px solid var(--c-border);padding-top:24px;font-size:14px;color:var(--c-text-2);
}
.more-links a{color:var(--c-primary);font-weight:600;}
.more-links a:hover{color:var(--c-primary-dark);text-decoration:underline;}
.more-links .dot{color:var(--c-text-3);}

/* ============ 页脚 ============ */
.site-footer{background:#fff;border-top:1px solid var(--c-border);padding:64px 0 28px;margin-top:0;}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:14px;}
.footer-desc{font-size:14px;line-height:1.8;color:var(--c-text-2);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--c-text);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--c-text-2);display:inline-block;transition:color 200ms ease,transform 200ms ease;}
.footer-col a:hover{color:var(--c-primary);transform:translateX(2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;
  border-top:1px solid var(--c-border);margin-top:48px;padding-top:22px;
  font-size:13px;color:var(--c-text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  h1{font-size:36px;}
}
@media (max-width:1023px){
  :root{--sec:64px;}
  h1{font-size:32px;}
  h2{font-size:26px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .media-frame img{height:300px;}
  .faq-layout{grid-template-columns:1fr;gap:32px;}
  .form-wrap{grid-template-columns:1fr;gap:32px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .stat-cell:nth-child(2){border-right:none;}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--c-border);}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-desc{max-width:none;}
}
@media (max-width:960px){
  .site-header{padding:12px 12px 0;}
  .nav-inner{padding:10px 12px;border-radius:16px;}
  .nav-toggle{display:flex;}
  .nav-cta{display:none;}
  .nav-links{
    display:none;position:absolute;top:calc(100% + 10px);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border:1px solid var(--c-border);border-radius:16px;box-shadow:var(--sh-3);
    padding:8px;z-index:130;
  }
  .nav-links.is-open{display:flex;}
  .nav-links>a{padding:14px 16px;border-radius:12px;font-size:15px;border-bottom:1px solid var(--c-border);}
  .nav-links>a:last-of-type{border-bottom:none;}
  .nav-links>a.active::after{display:none;}
  .nav-links>a.active{background:var(--c-primary-soft);}
  .nav-mobile-cta{display:inline-flex;width:100%;margin-top:8px;border-bottom:none !important;}
}
@media (max-width:767px){
  :root{--sec:48px;}
  .container{padding:0 16px;}
  h1{font-size:27px;}
  h2{font-size:23px;}
  h3{font-size:19px;}
  body{font-size:15px;}
  p{line-height:1.8;}
  .cat-hero{padding:130px 0 56px;}
  .cat-hero::after{width:80%;opacity:.1;}
  .hero-sub{font-size:16px;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{width:100%;}
  .trust-row{gap:12px 18px;}
  .tl-item{grid-template-columns:36px 1fr;gap:14px;padding-bottom:26px;}
  .tl-dot{width:36px;height:36px;font-size:13px;}
  .tl-item::before{left:17px;top:40px;}
  .tl-body{padding:18px 18px;}
  .strip-card{padding:18px;gap:14px;}
  .stat-grid{grid-template-columns:1fr;}
  .stat-cell{border-right:none;border-bottom:1px solid var(--c-border);padding:22px 20px;}
  .stat-cell:last-child{border-bottom:none;}
  .cta-band{padding:40px 22px;border-radius:20px;}
  .form-card{padding:22px;}
  .footer-top{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .media-frame::before{display:none;}
}
@media (max-width:420px){
  h1{font-size:24px;}
  .brand span:last-child{font-size:16px;}
  .btn{padding:11px 18px;font-size:14px;}
}