/* roulang page: index */
:root{
  --brand:#1B4B8F;
  --brand-deep:#12325F;
  --accent:#C08A2E;
  --surface:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3E8EF;
  --ink:#1B2533;
  --muted:#5B6779;
  --warn:#B4453A;
  --ok:#2F7D5C;
  --radius:12px;
  --shadow-1:0 1px 2px rgba(16,24,40,.06), 0 8px 24px -14px rgba(16,24,40,.18);
  --shadow-2:0 2px 4px rgba(16,24,40,.08), 0 14px 32px -16px rgba(16,24,40,.26);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color 180ms ease}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.site-container{width:100%;max-width:1280px;margin:0 auto;padding-left:32px;padding-right:32px}
.band{padding:80px 0}
.band-white{background:#FFFFFF;border-top:1px solid var(--line)}
.band-surface{background:var(--surface)}
@media (max-width:1023px){
  .band{padding:56px 0}
  .site-container{padding-left:24px;padding-right:24px}
}
@media (max-width:520px){
  .band{padding:40px 0}
  .site-container{padding-left:20px;padding-right:20px}
}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#FFFFFF;border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:var(--brand);color:#FFFFFF;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px}
.brand-name{display:block;font-size:16px;font-weight:700;line-height:1.25;color:var(--ink);white-space:nowrap}
.brand-sub{display:block;font-size:12px;color:var(--muted);line-height:1.3;white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:32px}
.nav-link{position:relative;font-size:15px;color:var(--muted);padding:6px 0;white-space:nowrap}
.nav-link:hover{color:var(--brand)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;background:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:16px}
.nav-quiet{font-size:14px;color:var(--muted);white-space:nowrap}
.nav-quiet:hover{color:var(--brand)}
.nav-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0 14px;border-radius:8px;border:1px solid var(--line);background:#FFFFFF;color:var(--brand);font-size:14px;font-weight:600;cursor:pointer;transition:background-color 180ms ease,border-color 180ms ease}
.nav-toggle:hover{background:#EDF2F9;border-color:var(--brand)}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#FFFFFF;padding:12px 0 20px}
.mobile-nav.open{display:block}
.mobile-nav .m-group{font-size:12px;color:var(--muted);padding:12px 4px 4px;letter-spacing:.04em}
.mobile-nav .m-link{display:flex;align-items:center;min-height:44px;padding:8px 4px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-nav .m-link:last-child{border-bottom:none}
.mobile-nav .m-link.active{color:var(--brand);font-weight:600}
.mobile-nav .m-actions{display:flex;flex-direction:column;gap:10px;margin-top:16px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 22px;border-radius:8px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;text-align:center;transition:background-color 180ms ease,color 180ms ease,border-color 180ms ease,transform 180ms ease,box-shadow 180ms ease}
.btn-primary{background:var(--brand);color:#FFFFFF}
.btn-primary:hover{background:var(--brand-deep);color:#FFFFFF;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:#FFFFFF;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:#EDF2F9;color:var(--brand-deep);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{padding:8px 16px;min-height:40px;font-size:14px}
.btn-block{width:100%}

/* ---------- Shared ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--brand);background:#EDF2F9;border-radius:999px;padding:6px 14px}
.section-title{font-size:30px;line-height:1.3;font-weight:700;color:var(--ink)}
.section-lead{margin-top:14px;font-size:16px;color:var(--muted);max-width:72ch}
.section-head{margin-bottom:8px}
.badge{display:inline-flex;align-items:center;font-size:12px;font-weight:500;padding:3px 10px;border-radius:999px;background:#EDF2F9;color:var(--brand);white-space:nowrap}
.badge-accent{background:#FBF3E4;color:#8A5F14}
.tag{display:inline-flex;align-items:center;font-size:12px;padding:3px 10px;border-radius:999px;background:#EDF2F9;color:var(--brand);white-space:nowrap}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--brand);margin-top:14px}
.text-link span{transition:transform 180ms ease}
.text-link:hover span{transform:translateX(3px)}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(180deg,#FFFFFF 0%,var(--surface) 100%);border-bottom:1px solid var(--line);padding:64px 0 72px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,0.95fr);gap:48px;align-items:start}
.hero-title{font-size:40px;line-height:1.25;font-weight:700;color:var(--ink);margin-top:18px}
.hero-sub{margin-top:16px;font-size:17px;color:var(--muted);max-width:56ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-note{margin-top:18px;font-size:13px;color:var(--muted);max-width:60ch}
.hero-note a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.panel{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:24px;min-width:0}
.panel-title{font-size:16px;font-weight:600;color:var(--ink)}
.panel-sub{font-size:13px;color:var(--muted);margin-top:6px}
.roadmap-list{list-style:none;margin:16px 0 0;padding:0}
.roadmap-item{display:flex;gap:14px;padding:12px 0;border-bottom:1px dashed var(--line);min-width:0}
.roadmap-item:last-child{border-bottom:none;padding-bottom:0}
.node-idx{width:32px;height:32px;flex:0 0 32px;border-radius:999px;border:1px solid var(--brand);background:#FFFFFF;color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;font-variant-numeric:tabular-nums}
.roadmap-item.current .node-idx{background:var(--brand);color:#FFFFFF}
.roadmap-title{font-size:15px;font-weight:600;color:var(--ink);line-height:1.4}
.roadmap-desc{font-size:13px;color:var(--muted);margin-top:2px}
.subscribe{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.subscribe-label{font-size:13px;font-weight:600;color:var(--ink)}
.subscribe-form{display:flex;gap:8px;margin-top:10px}
.subscribe-form input{flex:1 1 auto;min-width:0;height:44px;border-radius:8px;border:1px solid var(--line);padding:0 12px;font-size:14px;color:var(--ink);background:#FFFFFF;font-family:inherit}
.subscribe-form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(27,75,143,.18);outline:none}

/* ---------- Metrics ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:36px}
.metric{background:#FFFFFF;padding:24px 24px 22px;position:relative;min-width:0}
.metric::before{content:"";position:absolute;top:0;left:24px;width:36px;height:2px;background:var(--accent)}
.metric-name{font-size:14px;color:var(--muted)}
.metric-value{font-size:28px;font-weight:700;color:var(--accent);line-height:1.3;margin-top:6px;font-variant-numeric:tabular-nums}
.metric-desc{font-size:13px;color:var(--muted);margin-top:6px}

/* ---------- Matrix ---------- */
.matrix-group{margin-top:32px}
.matrix-group:first-of-type{margin-top:36px}
.matrix-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:16px}
.matrix-card{position:relative;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:20px 20px 20px 24px;min-width:0;transition:box-shadow 180ms ease,transform 180ms ease}
.matrix-card::before{content:"";position:absolute;left:0;top:16px;bottom:16px;width:4px;border-radius:0 4px 4px 0;background:var(--accent)}
.matrix-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.matrix-title{font-size:16px;font-weight:600;color:var(--ink);line-height:1.45}
.matrix-desc{font-size:13px;color:var(--muted);margin-top:8px}
.matrix-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}

/* ---------- Compare ---------- */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:36px}
.compare-card{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);overflow:hidden;min-width:0}
.compare-head{background:#EEF3FA;padding:18px 24px;border-bottom:1px solid var(--line)}
.compare-head h3{font-size:17px;font-weight:600;color:var(--brand-deep)}
.compare-head p{font-size:13px;color:var(--muted);margin-top:4px}
.compare-row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:48px;padding:8px 24px;border-bottom:1px solid var(--line);font-size:14px}
.compare-row:last-child{border-bottom:none}
.compare-key{color:var(--muted);flex:0 0 auto}
.compare-val{font-weight:500;text-align:right;min-width:0}

/* ---------- Timeline ---------- */
.timeline{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px;margin-top:44px;position:relative}
.timeline::before{content:"";position:absolute;left:5%;right:5%;top:16px;height:1px;background:var(--line)}
.tl-item{position:relative;min-width:0}
.tl-dot{width:32px;height:32px;border-radius:999px;border:1px solid var(--brand);background:#FFFFFF;color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;position:relative;z-index:1;font-variant-numeric:tabular-nums}
.tl-item.current .tl-dot{background:var(--brand);color:#FFFFFF}
.tl-title{font-size:15px;font-weight:600;color:var(--ink);margin-top:14px}
.tl-desc{font-size:13px;color:var(--muted);margin-top:6px}

/* ---------- News ---------- */
.news-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;margin-top:36px}
.news-list{display:flex;flex-direction:column;gap:16px;min-width:0}
.news-item{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:22px;min-width:0;transition:box-shadow 180ms ease,transform 180ms ease}
.news-item:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.news-meta{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--muted)}
.news-title{font-size:18px;font-weight:600;line-height:1.5;margin-top:10px}
.news-title a{color:var(--ink)}
.news-title a:hover{color:var(--brand)}
.news-summary{margin-top:8px;font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.side-panel{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:22px;min-width:0;height:max-content}
.side-title{font-size:15px;font-weight:600;color:var(--ink)}
.side-list{list-style:none;margin:12px 0 0;padding:0}
.side-list li{padding:10px 0;border-top:1px solid var(--line);font-size:14px;min-width:0}
.side-list li:first-child{border-top:none}
.side-list a{color:var(--ink)}
.side-list a:hover{color:var(--brand)}
.side-date{display:block;font-size:12px;color:var(--muted);margin-top:2px}
.empty-state{min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;background:#FFFFFF;border:1px dashed var(--line);border-radius:var(--radius);padding:32px;color:var(--muted);font-size:14px}
.empty-icon{width:48px;height:48px;border-radius:12px;background:var(--surface);display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:18px;font-weight:700}
.news-more{margin-top:24px}

/* ---------- Guarantee ---------- */
.guarantee-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:36px}
.g-card{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:22px;min-width:0;transition:box-shadow 180ms ease,transform 180ms ease}
.g-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.g-icon{width:40px;height:40px;border-radius:10px;background:#EDF2F9;color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
.g-title{font-size:16px;font-weight:600;color:var(--ink);margin-top:14px}
.g-desc{font-size:14px;color:var(--muted);margin-top:8px}

/* ---------- Quick find ---------- */
.quick-search{display:flex;gap:8px;max-width:640px;margin-top:28px}
.quick-search input{flex:1 1 auto;min-width:0;height:48px;border-radius:8px;border:1px solid var(--line);padding:0 14px;font-size:15px;background:#FFFFFF;color:var(--ink);font-family:inherit}
.quick-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(27,75,143,.18);outline:none}
.quick-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.quick-tag{display:inline-flex;align-items:center;min-height:40px;padding:8px 16px;border-radius:999px;background:#FFFFFF;border:1px solid var(--line);font-size:14px;color:var(--ink);transition:border-color 180ms ease,color 180ms ease,background-color 180ms ease}
.quick-tag:hover{border-color:var(--brand);color:var(--brand);background:#EDF2F9}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;margin:32px auto 0;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);overflow:hidden}
.faq-item{border-top:1px solid var(--line)}
.faq-item:first-child{border-top:none}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:16px 24px;font-size:16px;font-weight:500;color:var(--ink);cursor:pointer;list-style:none;transition:background-color 180ms ease}
.faq-q::-webkit-details-marker{display:none}
.faq-q::after{content:"+";font-size:20px;font-weight:400;color:var(--brand);flex:0 0 auto;transition:transform 180ms ease}
.faq-item[open] .faq-q{background:#F9FBFE;border-left:3px solid var(--accent);padding-left:21px}
.faq-item[open] .faq-q::after{content:"−"}
.faq-a{padding:0 24px 20px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- Consult form ---------- */
.consult-layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:32px;margin-top:36px}
.form-card{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:28px;min-width:0}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label{font-size:14px;color:var(--muted)}
.field input,.field select,.field textarea{width:100%;min-width:0;height:44px;border-radius:8px;border:1px solid var(--line);padding:0 12px;font-size:14px;color:var(--ink);background:#FFFFFF;font-family:inherit;transition:border-color 180ms ease,box-shadow 180ms ease}
.field textarea{height:auto;min-height:96px;padding:10px 12px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(27,75,143,.18);outline:none}
.field-full{grid-column:1 / -1}
.checkbox-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--muted);margin-top:18px}
.checkbox-row input[type="checkbox"]{width:18px;height:18px;flex:0 0 18px;margin-top:3px;accent-color:#1B4B8F}
.form-actions{margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.form-hint{font-size:13px;color:var(--muted)}
.consult-side{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:26px;min-width:0;height:max-content}
.side-step{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);min-width:0}
.side-step:last-child{border-bottom:none}
.side-num{width:26px;height:26px;flex:0 0 26px;border-radius:999px;background:#EDF2F9;color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;font-variant-numeric:tabular-nums}
.side-step-title{font-size:14px;font-weight:600;color:var(--ink)}
.side-step-desc{font-size:13px;color:var(--muted);margin-top:2px}

/* ---------- Download ---------- */
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:36px}
.dl-card{display:flex;flex-direction:column;gap:10px;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:24px;min-width:0;transition:box-shadow 180ms ease,transform 180ms ease}
.dl-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.dl-icon{width:40px;height:40px;border-radius:10px;background:var(--surface);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.dl-name{font-size:16px;font-weight:600;color:var(--ink)}
.dl-desc{font-size:13px;color:var(--muted)}
.dl-card .btn{margin-top:auto;width:100%}

/* ---------- Scenario ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:36px}
.scene-card{background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:22px;min-width:0;transition:box-shadow 180ms ease,transform 180ms ease}
.scene-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.scene-title{font-size:16px;font-weight:600;color:var(--ink)}
.scene-desc{font-size:14px;color:var(--muted);margin-top:8px}
.scene-tip{font-size:13px;color:#8A5F14;background:#FBF3E4;border-radius:8px;padding:8px 12px;margin-top:14px}

/* ---------- Terms ---------- */
.term-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 40px;margin-top:28px;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);padding:8px 28px}
.term-item{padding:18px 0;border-bottom:1px solid var(--line);min-width:0}
.term-name{font-size:15px;font-weight:600;color:var(--brand-deep)}
.term-desc{font-size:14px;color:var(--muted);margin-top:4px}

/* ---------- Risk ---------- */
.risk-inner{background:#FBF3F2;border:1px solid #EED9D6;border-left:4px solid var(--warn);border-radius:var(--radius);padding:28px}
.risk-title{font-size:22px;font-weight:700;color:var(--warn)}
.risk-text{font-size:15px;color:#6B4B47;margin-top:12px;max-width:80ch}
.risk-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--warn);margin-top:16px}
.risk-link:hover{color:#8E332B}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-deep);color:#D7E0EE;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;background:#FFFFFF;color:var(--brand-deep);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700}
.footer-brand-name{font-size:16px;font-weight:700;color:#FFFFFF;line-height:1.3}
.footer-brand-sub{font-size:12px;color:#A9BAD2}
.footer-about{font-size:14px;color:#C3D0E4;max-width:34ch}
.footer-title{font-size:14px;font-weight:600;color:#FFFFFF;margin-bottom:12px}
.footer-link{display:block;font-size:14px;color:#C3D0E4;padding:6px 0}
.footer-link:hover{color:var(--accent)}
.footer-bottom{margin-top:32px;padding-top:20px;border-top:1px solid rgba(255,255,255,.15);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#A9BAD2}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  .nav-main,.nav-actions{display:none}
  .nav-toggle{display:inline-flex}
  .nav-wrap{height:60px;gap:16px}
  .hero{padding:48px 0 56px}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .hero-title{font-size:32px}
  .section-title{font-size:26px}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .matrix-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-layout{grid-template-columns:minmax(0,1fr)}
  .guarantee-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .consult-layout{grid-template-columns:minmax(0,1fr)}
  .download-grid{grid-template-columns:minmax(0,1fr)}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .timeline{grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
}
@media (max-width:767px){
  .hero-title{font-size:28px}
  .hero-sub{font-size:16px}
  .section-title{font-size:24px}
  .metric-value{font-size:24px}
  .compare-grid{grid-template-columns:minmax(0,1fr)}
  .compare-row{flex-direction:column;align-items:flex-start;gap:4px;padding:12px 20px}
  .compare-val{text-align:left}
  .timeline{grid-template-columns:minmax(0,1fr);gap:20px;margin-top:32px}
  .timeline::before{left:16px;right:auto;top:8px;bottom:8px;width:1px;height:auto}
  .tl-item{padding-left:52px}
  .tl-dot{position:absolute;left:0;top:0}
  .tl-title{margin-top:0}
  .form-grid{grid-template-columns:minmax(0,1fr)}
  .term-grid{grid-template-columns:minmax(0,1fr);padding:8px 20px}
  .term-item:last-child{border-bottom:none}
  .faq-q{font-size:15px;padding:14px 20px}
  .faq-item[open] .faq-q{padding-left:17px}
  .faq-a{padding:0 20px 18px;font-size:14px}
}
@media (max-width:520px){
  .hero-title{font-size:26px}
  .metrics{grid-template-columns:minmax(0,1fr)}
  .matrix-cards{grid-template-columns:minmax(0,1fr)}
  .guarantee-grid{grid-template-columns:minmax(0,1fr)}
  .scene-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .subscribe-form{flex-wrap:wrap}
  .subscribe-form input{flex:1 1 100%}
  .subscribe-form .btn{width:100%}
  .quick-search{flex-wrap:wrap}
  .quick-search input{flex:1 1 100%}
  .quick-search .btn{width:100%}
  .form-card,.consult-side,.panel{padding:20px}
  .brand-name{font-size:15px}
}

/* roulang page: article */
:root{
  --brand:#1B4B8F;
  --brand-deep:#12325F;
  --accent:#C08A2E;
  --surface:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3E8EF;
  --ink:#1B2533;
  --muted:#5B6779;
  --warn:#B4453A;
  --ok:#2F7D5C;
  --radius:12px;
  --shadow-1:0 1px 2px rgba(16,24,40,.06), 0 8px 24px -14px rgba(16,24,40,.18);
  --shadow-2:0 2px 4px rgba(16,24,40,.08), 0 14px 32px -16px rgba(16,24,40,.26);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color 180ms ease}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.site-container{width:100%;max-width:1280px;margin:0 auto;padding-left:32px;padding-right:32px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#FFFFFF;border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;min-width:0}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);min-width:0}
.brand:hover{color:var(--ink)}
.brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:var(--brand);color:#FFFFFF;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px}
.brand-name{display:block;font-size:16px;font-weight:700;line-height:1.25;color:var(--ink);white-space:nowrap}
.brand-sub{display:block;font-size:12px;color:var(--muted);line-height:1.3;white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:32px}
.nav-link{position:relative;font-size:15px;color:var(--muted);padding:6px 0;white-space:nowrap}
.nav-link:hover{color:var(--brand)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;background:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:16px}
.nav-quiet{font-size:14px;color:var(--muted);white-space:nowrap}
.nav-quiet:hover{color:var(--brand)}
.nav-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0 14px;border-radius:8px;border:1px solid var(--line);background:#FFFFFF;color:var(--brand);font-size:14px;font-weight:600;cursor:pointer;transition:background-color 180ms ease,border-color 180ms ease}
.nav-toggle:hover{background:#EDF2F9;border-color:var(--brand)}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#FFFFFF;padding:12px 0 20px}
.mobile-nav.open{display:block}
.mobile-nav .m-group{font-size:12px;color:var(--muted);padding:12px 4px 4px;letter-spacing:.04em}
.mobile-nav .m-link{display:flex;align-items:center;min-height:44px;padding:8px 4px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-nav .m-link:last-child{border-bottom:none}
.mobile-nav .m-link.active{color:var(--brand);font-weight:600}
.mobile-nav .m-actions{display:flex;flex-direction:column;gap:10px;margin-top:16px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 22px;border-radius:8px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;text-align:center;transition:background-color 180ms ease,color 180ms ease,border-color 180ms ease,transform 180ms ease,box-shadow 180ms ease}
.btn-primary{background:var(--brand);color:#FFFFFF}
.btn-primary:hover{background:var(--brand-deep);color:#FFFFFF;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:#FFFFFF;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:#EDF2F9;color:var(--brand-deep);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{padding:8px 16px;min-height:40px;font-size:14px}
.btn-block{width:100%}

/* ---------- Shared ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--brand);background:#EDF2F9;border-radius:999px;padding:6px 14px}
.badge{display:inline-flex;align-items:center;font-size:12px;font-weight:500;padding:3px 10px;border-radius:999px;background:#EDF2F9;color:var(--brand);white-space:nowrap}
.badge-accent{background:#FBF3E4;color:#8A5F14}
.tag{display:inline-flex;align-items:center;font-size:12px;padding:3px 10px;border-radius:999px;background:#EDF2F9;color:var(--brand);white-space:nowrap}
.section-title{font-size:26px;line-height:1.35;font-weight:700;color:var(--ink);margin:0}
.section-lead{margin-top:12px;font-size:15px;color:var(--muted);max-width:72ch}
.section{padding:56px 0}
.section-alt{background:#FFFFFF}
.section-line{border-top:1px solid var(--line)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--brand)}

/* ---------- Article head ---------- */
.page-head{background:linear-gradient(180deg,#FFFFFF 0%,#FBFCFE 100%);border-bottom:1px solid var(--line);padding:32px 0 36px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:#B9C2CE}
.crumbs .now{color:var(--ink)}
.page-title{font-size:36px;line-height:1.35;font-weight:700;color:var(--ink);margin:14px 0 0;max-width:22em;overflow-wrap:break-word}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;margin-top:20px;font-size:13px;color:var(--muted)}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:#C6CFDB}

/* ---------- Media ---------- */
.media-section{background:#FFFFFF;padding:28px 0 8px}
.article-media{position:relative;overflow:hidden;max-width:1024px;margin:0 auto;aspect-ratio:21/9;border:1px solid var(--line);border-radius:12px;background:linear-gradient(135deg,#E8EEF6 0%,#F4F7FB 58%,#E9EFF7 100%);box-shadow:var(--shadow-1)}
.article-media::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(27,75,143,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(27,75,143,.055) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}

/* ---------- Keypoints ---------- */
.keypoints{max-width:768px;margin:0 auto;background:#F1F5FA;border:1px solid var(--line);border-radius:12px;padding:22px 24px}
.keypoints .kp-title{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:600;color:var(--ink);margin:0}
.keypoints .kp-title::before{content:"";width:3px;height:16px;border-radius:3px;background:var(--accent);display:inline-block}
.keypoints ul{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:10px}
.keypoints li{position:relative;padding-left:18px;font-size:15px;line-height:1.8;color:#33405A}
.keypoints li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--accent)}

/* ---------- Article body ---------- */
.article-wrap{max-width:768px;margin:0 auto;min-width:0}
.article-body{font-size:17px;line-height:1.85;color:var(--ink);overflow-wrap:break-word;word-break:normal}
.article-body h2{position:relative;font-size:24px;line-height:1.45;font-weight:700;color:var(--ink);margin:40px 0 14px;padding-left:14px}
.article-body h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--accent)}
.article-body h3{font-size:19px;line-height:1.5;font-weight:600;color:var(--ink);margin:28px 0 12px}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px}
.article-body li{margin-bottom:8px}
.article-body blockquote{margin:22px 0;padding:14px 18px;background:#F1F5FA;border-left:3px solid var(--brand);border-radius:0 8px 8px 0;color:#3C4A61}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:22px 0;box-shadow:var(--shadow-1)}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-deep)}
.article-body strong{font-weight:600}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0}
.article-body table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;font-size:15px;margin:22px 0}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top}
.article-body th{background:#F1F5FA;color:var(--brand-deep);font-weight:600;white-space:nowrap}

/* ---------- Empty ---------- */
.article-empty{background:#FFFFFF;border:1px solid var(--line);border-radius:12px;padding:44px 24px;text-align:center;box-shadow:var(--shadow-1)}
.article-empty .empty-title{font-size:20px;font-weight:600;color:var(--ink);margin:0 0 20px}

/* ---------- Risk note ---------- */
.risk-note{max-width:768px;margin:0 auto;background:#FDF6F4;border:1px solid #F0D8D3;border-left:3px solid var(--warn);border-radius:0 12px 12px 0;padding:18px 20px}
.risk-note .risk-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--warn);margin:0 0 6px}
.risk-note p{margin:0;font-size:15px;line-height:1.8;color:#6B5A57}

/* ---------- Related ---------- */
.related-block{max-width:768px;margin:0 auto}
.related-empty{background:#FFFFFF;border:1px dashed var(--line);border-radius:12px;padding:28px 24px;text-align:center}
.related-empty p{margin:0 0 16px;font-size:15px;color:var(--muted)}
.prevnext{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin-top:28px;padding-top:20px;border-top:1px solid var(--line)}
.prevnext a{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;min-height:44px}
.prevnext a:hover{color:var(--brand-deep)}

/* ---------- Download strip ---------- */
.dl-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.dl-item{background:#FFFFFF;border:1px solid var(--line);border-radius:12px;padding:20px;box-shadow:var(--shadow-1);display:flex;flex-direction:column;gap:12px;min-width:0;transition:box-shadow 180ms ease,transform 180ms ease}
.dl-item:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.dl-icon{width:40px;height:40px;border-radius:10px;background:#EDF2F9;color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex:0 0 40px}
.dl-name{font-size:15px;font-weight:600;color:var(--ink)}
.dl-desc{font-size:13px;line-height:1.7;color:var(--muted);margin:0}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand-deep);color:rgba(255,255,255,.82);padding:56px 0 24px;margin-top:64px}
.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-mark{width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;color:#FFFFFF;font-weight:700}
.footer-brand-name{display:block;color:#FFFFFF;font-weight:700;font-size:16px;line-height:1.3}
.footer-brand-sub{display:block;font-size:12px;color:rgba(255,255,255,.6);line-height:1.4}
.footer-about{margin:0;font-size:13px;line-height:1.85;color:rgba(255,255,255,.62);max-width:34ch}
.footer-title{font-size:14px;font-weight:600;color:#FFFFFF;margin-bottom:12px}
.footer-link{display:block;font-size:13.5px;color:rgba(255,255,255,.72);padding:5px 0;transition:color 180ms ease}
.footer-link:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:36px;padding-top:18px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.55)}

/* ---------- Responsive ---------- */
@media (max-width:1024px){
  .nav-main{display:none}
  .nav-actions .nav-quiet,.nav-actions .btn{display:none}
  .nav-toggle{display:inline-flex}
  .site-container{padding-left:24px;padding-right:24px}
  .page-title{font-size:30px}
  .section{padding:48px 0}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}
@media (max-width:768px){
  .site-container{padding-left:20px;padding-right:20px}
  .nav-wrap{height:60px}
  .brand-name{font-size:15px}
  .brand-sub{font-size:11.5px}
  .page-head{padding:24px 0 28px}
  .page-title{font-size:26px;line-height:1.4}
  .media-section{padding:20px 0 4px}
  .article-media{aspect-ratio:16/9}
  .article-body{font-size:16.5px;line-height:1.85}
  .article-body h2{font-size:21px;margin-top:32px}
  .article-body h3{font-size:18px}
  .keypoints{padding:18px 18px}
  .section{padding:40px 0}
  .dl-strip{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .site-footer{padding:40px 0 20px;margin-top:48px}
  .footer-about{max-width:none}
}
@media (max-width:520px){
  .page-title{font-size:23px}
  .meta-row{font-size:12.5px;gap:8px 14px}
  .footer-bottom{flex-direction:column;gap:8px}
  .prevnext{flex-direction:column;align-items:flex-start}
}

/* roulang page: category1 */
:root{
  --brand:#1B4B8F;
  --brand-deep:#12325F;
  --accent:#C08A2E;
  --surface:#F6F8FB;
  --card:#FFFFFF;
  --line:#E3E8EF;
  --ink:#1B2533;
  --muted:#5B6779;
  --warn:#B4453A;
  --ok:#2F7D5C;
  --radius:12px;
  --shadow-1:0 1px 2px rgba(16,24,40,.06), 0 8px 24px -14px rgba(16,24,40,.18);
  --shadow-2:0 2px 4px rgba(16,24,40,.08), 0 14px 32px -16px rgba(16,24,40,.26);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;padding:0}
.site-body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--surface);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
.site-container{width:100%;max-width:1280px;margin:0 auto;padding-left:32px;padding-right:32px}
/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#FFFFFF;border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}
.brand:hover{color:var(--ink)}
.brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:10px;background:var(--brand);color:#FFFFFF;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px}
.brand-name{display:block;font-size:16px;font-weight:700;line-height:1.25;color:var(--ink);white-space:nowrap}
.brand-sub{display:block;font-size:12px;color:var(--muted);line-height:1.3;white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:32px}
.nav-link{position:relative;font-size:15px;color:var(--muted);padding:6px 0;white-space:nowrap;text-decoration:none;transition:color 180ms ease}
.nav-link:hover{color:var(--brand)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;background:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:16px}
.nav-quiet{font-size:14px;color:var(--muted);white-space:nowrap;text-decoration:none;transition:color 180ms ease}
.nav-quiet:hover{color:var(--brand)}
.nav-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0 14px;border-radius:8px;border:1px solid var(--line);background:#FFFFFF;color:var(--brand);font-size:14px;font-weight:600;cursor:pointer;transition:background-color 180ms ease,border-color 180ms ease}
.nav-toggle:hover{background:#EDF2F9;border-color:var(--brand)}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#FFFFFF;padding:12px 0 20px}
.mobile-nav.open{display:block}
.mobile-nav .m-group{font-size:12px;color:var(--muted);padding:12px 4px 4px;letter-spacing:.04em}
.mobile-nav .m-link{display:flex;align-items:center;min-height:44px;padding:8px 4px;font-size:15px;color:var(--ink);border-bottom:1px solid var(--line);text-decoration:none}
.mobile-nav .m-link.active{color:var(--brand);font-weight:600}
.mobile-nav .m-actions{display:flex;flex-direction:column;gap:10px;margin-top:16px}
/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 22px;border-radius:8px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;text-align:center;text-decoration:none;transition:background-color 180ms ease,color 180ms ease,border-color 180ms ease,transform 180ms ease,box-shadow 180ms ease}
.btn-primary{background:var(--brand);color:#FFFFFF}
.btn-primary:hover{background:var(--brand-deep);color:#FFFFFF;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:none;box-shadow:none}
.btn-ghost{background:#FFFFFF;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:#EDF2F9;color:var(--brand-deep);transform:translateY(-1px)}
.btn-ghost:active{transform:none}
.btn-sm{padding:8px 16px;min-height:40px;font-size:14px}
.btn-block{width:100%}
.btn:focus-visible,.nav-link:focus-visible,.nav-quiet:focus-visible,.footer-link:focus-visible,.filter-btn:focus-visible,.card-title:focus-visible,.text-link:focus-visible,.crumb-link:focus-visible,.nav-toggle:focus-visible,.m-link:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
/* ---------- Shared ---------- */
.section{padding:80px 0}
.section-white{background:#FFFFFF}
.section-surface{background:var(--surface)}
.section-head{margin-bottom:28px}
.section-title{font-size:30px;line-height:1.3;font-weight:700;color:var(--ink)}
.section-lead{margin-top:12px;font-size:16px;color:var(--muted);max-width:74ch}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--brand);background:#EDF2F9;border-radius:999px;padding:6px 14px}
.badge{display:inline-flex;align-items:center;font-size:12px;font-weight:500;padding:3px 10px;border-radius:999px;background:#EDF2F9;color:var(--brand);white-space:nowrap}
.badge-accent{background:#FBF3E4;color:#8A5F14}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--brand);text-decoration:none;transition:color 180ms ease}
.text-link:hover{color:var(--brand-deep)}
.text-link span{transition:transform 180ms ease}
.text-link:hover span{transform:translateX(3px)}
/* ---------- 频道页头 ---------- */
.channel-head{background:linear-gradient(180deg,#FFFFFF 0%,var(--surface) 100%);border-bottom:1px solid var(--line);padding:40px 0 44px}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.crumb-link{color:var(--muted);font-size:13px;text-decoration:none;transition:color 180ms ease}
.crumb-link:hover{color:var(--brand)}
.crumb-sep{color:#B9C2CF}
.crumb-now{color:var(--ink);font-weight:500}
.channel-title{margin-top:16px;font-size:34px;line-height:1.32;font-weight:700;color:var(--ink);max-width:30ch}
.channel-desc{margin-top:14px;font-size:16px;color:var(--muted);max-width:78ch;line-height:1.85}
.stat-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:26px;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);padding:18px 24px;box-shadow:var(--shadow-1)}
.stat-item{min-width:0}
.stat-label{display:block;font-size:12px;color:var(--muted)}
.stat-value{display:block;margin-top:6px;font-size:15px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}
/* ---------- 导语 ---------- */
.intro-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:48px;align-items:start}
.intro-text p{font-size:16px;color:var(--muted);line-height:1.85;margin-top:14px;max-width:66ch}
.term-rail{display:flex;flex-direction:column;gap:12px;min-width:0}
.term-item{background:#FFFFFF;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:10px;padding:16px 18px;min-width:0}
.term-name{display:block;font-size:15px;font-weight:600;color:var(--brand)}
.term-desc{margin-top:6px;font-size:13px;color:var(--muted);line-height:1.75}
/* ---------- 列表卡片 ---------- */
.rule-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.rule-card{display:flex;flex-direction:column;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);transition:transform 180ms ease,box-shadow 180ms ease;min-width:0}
.rule-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.card-cover{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#EDF2F9 0%,#DEE7F3 100%);display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line);overflow:hidden}
.card-cover-num{font-size:30px;font-weight:700;color:rgba(27,75,143,.26);letter-spacing:.08em;font-variant-numeric:tabular-nums}
.card-cover-tag{position:absolute;left:14px;top:14px;font-size:12px;padding:3px 10px;border-radius:999px;background:rgba(255,255,255,.92);color:var(--brand);max-width:calc(100% - 28px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card-body{padding:22px 24px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;min-width:0}
.card-title{display:block;font-size:18px;line-height:1.55;font-weight:600;color:var(--ink);text-decoration:none;transition:color 180ms ease}
.card-title:hover{color:var(--brand)}
.card-excerpt{font-size:14px;color:var(--muted);line-height:1.75;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;flex-wrap:wrap;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.list-more{display:flex;justify-content:center;margin-top:32px}
/* ---------- 筛选条 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.filter-btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:8px 18px;border-radius:999px;border:1px solid var(--line);background:#FFFFFF;font-size:14px;color:var(--muted);cursor:pointer;font-family:inherit;transition:background-color 180ms ease,color 180ms ease,border-color 180ms ease,transform 180ms ease}
.filter-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.filter-btn.active{background:var(--brand);border-color:var(--brand);color:#FFFFFF;font-weight:600}
.filter-note{margin-top:16px;font-size:13px;color:var(--muted)}
/* ---------- 精选专题 ---------- */
.spotlight-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.spotlight-card{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);transition:transform 180ms ease,box-shadow 180ms ease;min-width:0}
.spotlight-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.spotlight-body{padding:24px;display:flex;flex-direction:column;gap:10px;min-width:0}
.spotlight-title{font-size:18px;line-height:1.5;font-weight:600;color:var(--ink);text-decoration:none;display:block;transition:color 180ms ease}
.spotlight-title:hover{color:var(--brand)}
.spotlight-text{font-size:14px;color:var(--muted);line-height:1.75}
.spotlight-media{background:linear-gradient(135deg,#EDF2F9 0%,#D8E3F1 100%);display:flex;align-items:center;justify-content:center;min-height:180px;padding:16px;border-left:1px solid var(--line)}
.spotlight-media span{font-size:13px;color:rgba(27,75,143,.55);font-weight:600;text-align:center;line-height:1.6}
/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line);background:transparent;transition:background-color 180ms ease}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:16px 4px;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::marker{content:""}
.faq-item[open]{background:#FFFFFF;border-left:3px solid var(--accent);border-radius:8px;box-shadow:var(--shadow-1)}
.faq-item[open] summary{padding-left:16px;padding-right:16px}
.faq-icon{position:relative;flex:0 0 22px;width:22px;height:22px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform 200ms ease,opacity 200ms ease}
.faq-icon::before{left:3px;right:3px;top:10px;height:2px}
.faq-icon::after{top:3px;bottom:3px;left:10px;width:2px}
.faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-answer{font-size:15px;color:var(--muted);line-height:1.85;padding:0 16px 18px 16px;max-width:70ch}
.faq-answer a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
/* ---------- 下载横幅 ---------- */
.dl-banner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;background:#FFFFFF;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-1);padding:26px 28px}
.dl-text{flex:1 1 320px;min-width:0}
.dl-title{font-size:19px;font-weight:600;color:var(--ink)}
.dl-desc{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.75;max-width:52ch}
.dl-actions{display:flex;flex-wrap:wrap;gap:12px;flex:0 1 auto}
.dl-btn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:10px 18px;border-radius:8px;border:1px solid var(--brand);background:#FFFFFF;color:var(--brand);font-size:14px;font-weight:600;text-decoration:none;transition:background-color 180ms ease,color 180ms ease,transform 180ms ease,box-shadow 180ms ease}
.dl-btn:hover{background:#EDF2F9;color:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.dl-btn:active{transform:none}
.dl-btn .dl-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex:0 0 8px}
/* ---------- 风险与返回 ---------- */
.risk-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;background:#FBF4F2;border:1px solid #EBD5D0;border-radius:var(--radius);padding:24px 28px}
.risk-text{flex:1 1 420px;min-width:0}
.risk-title{font-size:17px;font-weight:600;color:var(--warn)}
.risk-desc{margin-top:8px;font-size:14px;color:#7A4B44;line-height:1.8;max-width:72ch}
/* ---------- 空态 ---------- */
.empty-state{min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:#FFFFFF;border:1px dashed var(--line);border-radius:var(--radius);padding:36px 24px;text-align:center}
.empty-text{font-size:15px;color:var(--muted)}
/* ---------- Footer ---------- */
.site-footer{background:var(--brand-deep);color:#FFFFFF;padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-mark{width:34px;height:34px;flex:0 0 34px;border-radius:10px;background:var(--accent);color:#12325F;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.footer-brand-name{display:block;font-size:16px;font-weight:700;line-height:1.3}
.footer-brand-sub{display:block;font-size:12px;color:rgba(255,255,255,.66);line-height:1.4}
.footer-about{margin-top:14px;font-size:13px;line-height:1.8;color:rgba(255,255,255,.72);max-width:36ch}
.footer-title{font-size:14px;font-weight:600;margin-bottom:10px;color:#FFFFFF}
.footer-link{display:block;font-size:13px;color:rgba(255,255,255,.72);padding:5px 0;text-decoration:none;transition:color 180ms ease}
.footer-link:hover{color:var(--accent)}
.footer-bottom{margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:rgba(255,255,255,.6)}
/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .site-container{padding-left:24px;padding-right:24px}
  .nav-main{display:none}
  .nav-quiet{display:none}
  .nav-toggle{display:inline-flex}
  .section{padding:56px 0}
  .channel-title{font-size:30px}
  .intro-grid{grid-template-columns:minmax(0,1fr);gap:32px}
  .spotlight-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .section-title{font-size:26px}
}
@media (max-width:767px){
  .site-container{padding-left:20px;padding-right:20px}
  .nav-wrap{height:64px}
  .brand-name{font-size:15px}
  .brand-sub{display:none}
  .section{padding:40px 0}
  .channel-head{padding:28px 0 32px}
  .channel-title{font-size:26px}
  .stat-strip{grid-template-columns:minmax(0,1fr);gap:14px;padding:16px 18px}
  .rule-grid{grid-template-columns:minmax(0,1fr)}
  .card-body{padding:18px 18px 20px}
  .spotlight-card{grid-template-columns:minmax(0,1fr)}
  .spotlight-media{border-left:none;border-top:1px solid var(--line);min-height:130px;order:2}
  .spotlight-body{order:1}
  .dl-banner{flex-direction:column;align-items:flex-start;padding:22px 20px}
  .dl-actions{width:100%;flex-direction:column}
  .dl-btn{width:100%;justify-content:center}
  .risk-bar{flex-direction:column;align-items:flex-start;padding:20px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .section-title{font-size:24px}
  .faq-item summary{font-size:15px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .channel-title{font-size:24px}
  .section-title{font-size:22px}
  .card-cover-num{font-size:24px}
}