/* roulang page: index */
:root{
  --c-900:#083E52; --c-700:#0E5A75; --c-500:#1C7E9C; --c-100:#E6F1F6;
  --a-600:#D94E1F; --a-500:#F2622E; --a-100:#FDEDE5;
  --g-500:#12A47A;
  --t-900:#12262E; --t-700:#3A525C; --t-500:#667C86;
  --line:#E2E9ED; --bg:#F5F8FA; --card:#FFFFFF;
  --r-card:14px; --r-img:12px; --r-btn:10px; --r-pill:999px;
  --sh-1:0 1px 2px rgba(8,62,82,.06);
  --sh-2:0 12px 28px -12px rgba(8,62,82,.16);
  --s-4:4px; --s-8:8px; --s-12:12px; --s-16:16px; --s-24:24px; --s-32:32px; --s-48:48px; --s-64:64px; --s-96:96px;
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; padding:0 0 calc(56px + env(safe-area-inset-bottom));
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px; line-height:1.7; color:var(--t-900); background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--c-500);text-decoration:none;transition:color 180ms ease,background-color 180ms ease,border-color 180ms ease}
a:hover{color:var(--c-700)}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
strong{font-weight:700}
:focus-visible{outline:2px solid var(--c-500);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;height:var(--nav-h);
  background:#fff;border-bottom:1px solid transparent;
  transition:box-shadow 200ms ease,border-color 200ms ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 18px -12px rgba(8,62,82,.28)}
.header-inner{height:var(--nav-h);display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:none;color:var(--t-900)}
.brand:hover{color:var(--t-900)}
.brand-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--c-700),var(--c-500));position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;left:9px;top:9px;right:9px;bottom:9px;border:2px solid rgba(255,255,255,.92);border-radius:6px;border-top-color:transparent;transform:rotate(-30deg)}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.2px;line-height:1.2;white-space:nowrap}
.brand-sub{display:block;font-size:11px;font-weight:400;color:var(--t-500);letter-spacing:.6px;margin-top:2px}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.main-nav a{
  position:relative;display:inline-block;padding:10px 14px;border-radius:var(--r-btn);
  font-size:15px;color:var(--t-700);font-weight:500;
}
.main-nav a:hover{color:var(--c-700);background:var(--c-100)}
.main-nav a.is-active{color:var(--c-900);font-weight:700;background:var(--c-100)}
.main-nav a.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;background:var(--a-500)}
.header-cta{margin-left:12px}
.header-cta a{padding:11px 20px;background:var(--a-500);color:#fff;border-radius:var(--r-btn);font-size:15px;font-weight:600;box-shadow:var(--sh-1);display:inline-block}
.header-cta a:hover{background:var(--a-600);color:#fff;transform:translateY(-1px)}
.drawer-toggle{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);align-items:center;justify-content:center;background:#fff;color:var(--c-900)}
.drawer-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative}
.drawer-toggle span::before,.drawer-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor}
.drawer-toggle span::before{top:-6px}.drawer-toggle span::after{top:6px}
.drawer{display:none;border-top:1px solid var(--line);background:#fff}
.drawer.is-open{display:block}
.drawer ul{padding:10px 0}
.drawer a{display:block;padding:14px 32px;font-size:16px;color:var(--t-700);border-left:3px solid transparent}
.drawer a.is-active{color:var(--c-900);font-weight:700;border-left-color:var(--a-500);background:var(--c-100)}
.drawer .drawer-cta{margin:8px 32px 18px;display:block;text-align:center;padding:13px;background:var(--a-500);color:#fff;border-radius:var(--r-btn);font-weight:600}
.drawer .drawer-cta:hover{background:var(--a-600);color:#fff}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:var(--r-btn);font-size:16px;font-weight:600;line-height:1.2;transition:all 180ms ease;border:1px solid transparent}
.btn-primary{background:var(--a-500);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--a-600);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--c-700);border-color:var(--c-500)}
.btn-ghost:hover{background:var(--c-100);color:var(--c-900);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--c-700)}
.link-arrow i{display:inline-block;width:16px;height:16px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(-45deg);transition:transform 180ms ease;margin-left:2px}
.link-arrow:hover{color:var(--a-600)}
.link-arrow:hover i{transform:rotate(-45deg) translate(2px,2px)}

/* ---------- tags ---------- */
.tag{display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--r-pill);font-size:13px;font-weight:500;background:var(--c-100);color:var(--c-700);line-height:1.6}
.tag-accent{background:var(--a-100);color:var(--a-600)}
.tag-green{background:rgba(18,164,122,.12);color:var(--g-500)}

/* ---------- section base ---------- */
.section{padding:var(--s-96) 0}
.section-sm{padding:var(--s-64) 0}
.section-head{margin-bottom:var(--s-48);max-width:760px}
.section-head.row-between{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--c-500);letter-spacing:1px;margin-bottom:12px}
.section-title{font-size:clamp(24px,3.4vw,34px);font-weight:700;line-height:1.3;color:var(--t-900)}
.section-desc{margin-top:14px;font-size:16px;color:var(--t-700);max-width:760px}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:#fff;border-bottom:1px solid var(--line)}
.hero-svg{position:absolute;right:-40px;bottom:-60px;width:620px;height:320px;opacity:.07;pointer-events:none}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.02fr .98fr;gap:var(--s-64);align-items:center;padding:72px 0 76px;min-height:480px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);background:var(--c-100);color:var(--c-700);font-size:13px;font-weight:600;margin-bottom:20px}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--g-500)}
.hero h1{font-size:clamp(28px,5vw,44px);font-weight:700;line-height:1.24;color:var(--c-900);letter-spacing:-.4px}
.hero-sub{margin-top:20px;font-size:18px;color:var(--t-700);max-width:520px}
.hero-actions{margin-top:34px;display:flex;flex-wrap:wrap;gap:14px}
.hero-meta{margin-top:38px;display:flex;flex-wrap:wrap;gap:12px 28px;padding-top:24px;border-top:1px solid var(--line)}
.hero-meta li{font-size:14px;color:var(--t-500)}
.hero-meta strong{display:block;font-size:15px;color:var(--t-900);font-weight:600;margin-bottom:2px}
.hero-visual{position:relative}
.hero-visual img{width:100%;height:420px;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--sh-2)}
.hero-float{
  position:absolute;left:-18px;bottom:26px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:16px 20px;box-shadow:var(--sh-2);min-width:210px;
}
.hero-float b{display:block;font-size:14px;color:var(--t-900);margin-bottom:4px}
.hero-float span{font-size:13px;color:var(--t-500)}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(150px,auto);gap:24px}
.bcard{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;
  display:flex;flex-direction:column;box-shadow:var(--sh-1);transition:transform 180ms ease,box-shadow 180ms ease,border-color 180ms ease;
}
.bcard:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#CFDDE4}
.bcard-lg{grid-column:span 2;grid-row:span 2;background:linear-gradient(180deg,#fff 0%,#F7FBFD 100%)}
.bcard-wide{grid-column:span 2;flex-direction:row;align-items:center;gap:24px}
.bcard-wide img{width:150px;height:112px;object-fit:cover;border-radius:var(--r-img);flex:none}
.bcard-icon{width:44px;height:44px;border-radius:12px;background:var(--c-100);color:var(--c-700);display:flex;align-items:center;justify-content:center;margin-bottom:18px;flex:none}
.bcard-icon svg{width:22px;height:22px}
.bcard h3{font-size:20px;font-weight:600;color:var(--t-900);margin-bottom:10px}
.bcard p{font-size:15px;color:var(--t-700);line-height:1.7}
.bcard .link-arrow{margin-top:auto;padding-top:20px}
.bcard-lg h3{font-size:24px}
.bcard-lg p{font-size:16px}
.bcard-list{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.bcard-list li{font-size:14px;color:var(--t-700);padding-left:18px;position:relative}
.bcard-list li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;background:var(--g-500)}

/* ---------- stats ---------- */
.stats{background:var(--c-900);color:#fff;padding:64px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:8px 32px;border-left:1px solid rgba(255,255,255,.16)}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{font-size:clamp(34px,4.6vw,52px);font-weight:700;line-height:1.1;color:#fff;font-variant-numeric:tabular-nums}
.stat-num em{font-size:18px;font-style:normal;font-weight:500;color:rgba(255,255,255,.72);margin-left:6px}
.stat-label{margin-top:12px;font-size:15px;font-weight:600;color:#fff}
.stat-desc{margin-top:6px;font-size:13px;color:rgba(255,255,255,.66);line-height:1.6}

/* ---------- scenario ---------- */
.scenario{display:grid;grid-template-columns:1.05fr 1fr;gap:var(--s-64);align-items:center}
.scenario-media img{width:100%;height:430px;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--sh-2)}
.list-rows{margin-top:8px}
.list-row{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.list-row:last-child{border-bottom:0}
.list-row .idx{font-size:15px;font-weight:700;color:var(--c-500);font-variant-numeric:tabular-nums;flex:none;padding-top:2px}
.list-row h3{font-size:17px;font-weight:600;color:var(--t-900);margin-bottom:6px}
.list-row p{font-size:14px;color:var(--t-700);line-height:1.7}

/* ---------- zigzag ---------- */
.zig{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-64);align-items:center;padding:var(--s-48) 0;border-top:1px solid var(--line)}
.zig:first-child{border-top:0;padding-top:0}
.zig.reverse .zig-media{order:2}
.zig-media img{width:100%;height:300px;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--sh-1)}
.zig-step{font-size:44px;font-weight:700;color:var(--c-100);line-height:1;font-variant-numeric:tabular-nums;margin-bottom:12px}
.zig h3{font-size:22px;font-weight:600;color:var(--t-900);margin-bottom:12px}
.zig p{font-size:16px;color:var(--t-700)}
.zig-points{margin-top:18px;display:flex;flex-wrap:wrap;gap:10px}

/* ---------- news ---------- */
.news-wrap{display:grid;grid-template-columns:1.1fr 1fr;gap:var(--s-48);align-items:start}
.news-feature{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform 180ms ease,box-shadow 180ms ease}
.news-feature:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.news-feature img{width:100%;height:250px;object-fit:cover}
.news-feature-body{padding:26px}
.news-feature-body h3{font-size:22px;font-weight:600;line-height:1.4;margin:14px 0 12px;color:var(--t-900)}
.news-feature-body p{font-size:15px;color:var(--t-700)}
.news-meta{display:flex;align-items:center;gap:14px;margin-top:18px;font-size:13px;color:var(--t-500)}
.news-list{display:flex;flex-direction:column}
.news-item{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.news-item:last-child{border-bottom:0}
.news-item img{width:120px;height:80px;object-fit:cover;border-radius:10px;flex:none}
.news-item h3{font-size:16px;font-weight:600;color:var(--t-900);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item p{margin-top:6px;font-size:13px;color:var(--t-500);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item .news-meta{margin-top:8px;font-size:12px}
.empty-state{
  border:1px dashed #C9D9E1;border-radius:var(--r-card);background:#fff;padding:48px 32px;text-align:center;
  min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
.empty-state svg{width:42px;height:42px;color:var(--c-500)}
.empty-state h3{font-size:18px;font-weight:600;color:var(--t-900)}
.empty-state p{font-size:14px;color:var(--t-500);max-width:420px}

/* ---------- faq ---------- */
.faq-list{max-width:780px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--r-card);background:#fff;margin-bottom:12px;overflow:hidden;transition:box-shadow 180ms ease}
.faq-item:hover{box-shadow:var(--sh-1)}
.faq-item summary{
  list-style:none;cursor:pointer;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:17px 22px;font-size:16px;font-weight:600;color:var(--t-900);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item[open]{box-shadow:inset 3px 0 0 var(--c-500)}
.faq-item[open] summary{color:var(--c-900)}
.fx{position:relative;width:20px;height:20px;flex:none;transition:transform 180ms ease}
.fx::before,.fx::after{content:"";position:absolute;background:var(--c-500);border-radius:2px}
.fx::before{left:50%;top:2px;bottom:2px;width:2px;transform:translateX(-50%)}
.fx::after{top:50%;left:2px;right:2px;height:2px;transform:translateY(-50%)}
.faq-item[open] .fx{transform:rotate(45deg)}
.faq-answer{padding:0 22px 20px;font-size:15px;color:var(--t-700);line-height:1.8;max-width:660px}

/* ---------- cta / form ---------- */
.cta-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-grid{display:grid;grid-template-columns:1fr 460px;gap:var(--s-64);align-items:start;padding:var(--s-96) 0}
.cta-copy h2{font-size:clamp(24px,3.2vw,32px);font-weight:700;line-height:1.32;color:var(--c-900)}
.cta-copy p{margin-top:16px;font-size:16px;color:var(--t-700);max-width:520px}
.cta-points{margin-top:28px;display:flex;flex-direction:column;gap:12px}
.cta-points li{display:flex;gap:10px;font-size:15px;color:var(--t-700)}
.cta-points li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--g-500);flex:none;margin-top:9px}
.form-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-card);padding:32px;box-shadow:var(--sh-1)}
.form-card h3{font-size:20px;font-weight:600;margin-bottom:6px}
.form-card .form-hint{font-size:13px;color:var(--t-500);margin-bottom:22px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--t-700);margin-bottom:8px}
.field input,.field textarea{
  width:100%;height:44px;padding:0 14px;border:1px solid #D5E0E6;border-radius:var(--r-btn);background:#fff;
  transition:border-color 180ms ease,box-shadow 180ms ease,background-color 180ms ease;
}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--c-500);background:#FBFDFE;box-shadow:0 0 0 3px rgba(28,126,156,.14)}
.field.has-error input,.field.has-error textarea{border-color:var(--a-500)}
.field .err{display:none;margin-top:6px;font-size:13px;color:var(--a-600)}
.field.has-error .err{display:block}
.check{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--t-700);margin-bottom:20px}
.check input{width:18px;height:18px;flex:none;margin-top:3px;accent-color:var(--c-500)}
.form-card .btn{width:100%}
.form-success{display:none;margin-top:16px;padding:14px 16px;border-radius:var(--r-btn);background:rgba(18,164,122,.1);border:1px solid rgba(18,164,122,.3);color:#0B7A5B;font-size:14px}
.form-success.is-show{display:block}

/* ---------- footer ---------- */
.site-footer{background:var(--c-900);color:rgba(255,255,255,.78);margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:var(--s-48);padding:72px 0 48px}
.site-footer h4{font-size:16px;font-weight:600;color:#fff;margin-bottom:18px}
.site-footer .f-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.site-footer .f-brand .brand-mark{background:rgba(255,255,255,.14)}
.site-footer .f-brand .brand-mark::after{border-color:rgba(255,255,255,.85);border-top-color:transparent}
.site-footer .f-brand span{font-size:17px;font-weight:700;color:#fff}
.site-footer p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.7);max-width:320px}
.f-links li{margin-bottom:12px}
.site-footer a{color:rgba(255,255,255,.76);font-size:14px}
.site-footer a:hover{color:#fff}
.f-contact li{font-size:14px;line-height:1.8;margin-bottom:10px;color:rgba(255,255,255,.76)}
.f-contact strong{color:#fff;font-weight:600;display:block;font-size:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6)}
.footer-bottom a{color:rgba(255,255,255,.7)}

/* ---------- mobile tab ---------- */
.mtab{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;height:56px;
  background:#fff;border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mtab a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:10px;color:var(--t-500);position:relative}
.mtab a svg{width:24px;height:24px}
.mtab a.is-active{color:var(--c-700);font-weight:600}
.mtab a.is-active::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:28px;height:2px;border-radius:2px;background:var(--a-500)}
.mtab a:hover{color:var(--c-700)}

@media (max-width:1023px){
  .container{padding:0 20px}
  .main-nav,.header-cta{display:none}
  .drawer-toggle{display:flex}
  .mtab{display:flex}
  .section{padding:56px 0}
  .section-sm{padding:44px 0}
  .section-head{margin-bottom:32px}
  .section-head.row-between{flex-direction:column;align-items:flex-start;gap:14px}
  .hero-inner{grid-template-columns:1fr;gap:32px;padding:40px 0 52px;min-height:auto}
  .hero-visual img{height:300px}
  .hero-float{left:12px;bottom:14px}
  .bento{grid-template-columns:repeat(2,1fr);grid-auto-rows:auto}
  .bcard-lg,.bcard-wide{grid-column:span 2;grid-row:auto}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px 0}
  .stat{padding:0 24px}
  .stat:nth-child(odd){border-left:0;padding-left:0}
  .scenario{grid-template-columns:1fr;gap:32px}
  .scenario-media img{height:300px}
  .zig{grid-template-columns:1fr;gap:24px;padding:32px 0}
  .zig.reverse .zig-media{order:0}
  .news-wrap{grid-template-columns:1fr;gap:32px}
  .cta-grid{grid-template-columns:1fr;gap:36px;padding:56px 0}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;padding:48px 0 32px}
}
@media (max-width:640px){
  .bento{grid-template-columns:1fr}
  .bcard-lg,.bcard-wide{grid-column:span 1}
  .bcard-wide{flex-direction:column;align-items:flex-start}
  .bcard-wide img{width:100%;height:170px}
  .stats-grid{grid-template-columns:1fr;gap:28px 0}
  .stat{padding:0;border-left:0;border-top:1px solid rgba(255,255,255,.16);padding-top:24px}
  .stat:first-child{border-top:0;padding-top:0}
  .footer-grid{grid-template-columns:1fr}
  .news-item img{width:96px;height:68px}
  .brand-text{font-size:15px;white-space:normal;max-width:190px}
  .hero-visual img{height:230px}
  .hero-float{position:static;margin-top:14px;left:auto;bottom:auto;min-width:0}
  .scenario-media img,.zig-media img{height:230px}
}

/* roulang page: article */
:root{
  --c900:#083E52;--c700:#0E5A75;--c500:#1C7E9C;--c100:#E6F1F6;
  --o600:#D94E1F;--o500:#F2622E;--o100:#FDEDE5;
  --green:#12A47A;
  --t1:#12262E;--t2:#3A525C;--t3:#667C86;
  --line:#E2E9ED;--bg:#F5F8FA;--card:#FFFFFF;
  --r-card:14px;--r-img:12px;--r-btn:10px;
  --sh1:0 1px 2px rgba(8,62,82,.06);
  --sh2:0 12px 28px -12px rgba(8,62,82,.16);
  --ease:180ms ease;
}
*,*::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",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;color:var(--t1);background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--c500);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--c900);text-decoration:underline;text-underline-offset:3px}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--c500);outline-offset:2px}
h1,h2,h3,h4,h5,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,textarea,select{font:inherit;color:inherit}
strong{font-weight:600}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:64px 0}
.section-tight{padding:40px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:30px;line-height:1.3;font-weight:700;color:var(--c900)}
.section-head p{margin-top:10px;color:var(--t2);font-size:15px;max-width:640px}
.more-link{font-size:15px;font-weight:600;color:var(--c700);white-space:nowrap}
.more-link:hover{color:var(--o600)}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid transparent;transition:border-color var(--ease),box-shadow var(--ease)}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh1),0 8px 20px -16px rgba(8,62,82,.35)}
.header-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--c900);letter-spacing:.2px}
.logo:hover{color:var(--c700);text-decoration:none}
.brand-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(140deg,var(--c500),var(--c900));position:relative;flex:0 0 auto}
.brand-mark::after{content:"";position:absolute;left:8px;top:9px;width:14px;height:12px;border:2px solid #fff;border-radius:3px;border-top-color:transparent;transform:rotate(-18deg)}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:9px 15px;border-radius:10px;font-size:15px;font-weight:500;color:var(--t2);transition:background var(--ease),color var(--ease)}
.main-nav a:hover{background:var(--c100);color:var(--c900);text-decoration:none}
.main-nav a.is-active{background:var(--c100);color:var(--c900);font-weight:600}
.header-cta{flex:0 0 auto}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:10px;align-items:center;justify-content:center;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c900);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c900);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--o500);color:#fff}
.btn-primary:hover{background:var(--o600);color:#fff;box-shadow:0 10px 22px -12px rgba(217,78,31,.75)}
.btn-ghost{background:transparent;border-color:var(--c500);color:var(--c700)}
.btn-ghost:hover{background:var(--c100);color:var(--c900)}
.btn-light{background:#fff;color:var(--c900)}
.btn-light:hover{background:var(--c100);color:var(--c900)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-block{width:100%}

/* 抽屉 */
.drawer{display:none;position:fixed;top:72px;left:0;right:0;bottom:0;background:#fff;z-index:65;padding:18px 20px 30px;overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity var(--ease),transform var(--ease),visibility var(--ease)}
.drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer nav{display:flex;flex-direction:column;margin-bottom:20px}
.drawer nav a{padding:14px 12px;border-bottom:1px solid var(--line);font-size:16px;color:var(--t1);font-weight:500}
.drawer nav a.is-active{color:var(--c700);font-weight:600}
.drawer nav a:hover{background:var(--c100);text-decoration:none;border-radius:10px}

/* 面包屑 */
.breadcrumb{padding:22px 0 4px;font-size:14px;color:var(--t3);display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb a{color:var(--t3)}
.breadcrumb a:hover{color:var(--c700)}
.breadcrumb .sep{color:#C3D2D9}
.breadcrumb .current{max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--t2)}

/* 文章布局 */
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:56px;justify-content:center;align-items:start;padding:20px 0 0}
.article-main{min-width:0}
.article-head{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:32px 34px;box-shadow:var(--sh1);margin-bottom:28px}
.article-head h1{font-size:clamp(26px,4vw,36px);line-height:1.35;font-weight:700;color:var(--c900);margin:14px 0 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:var(--o100);color:var(--o600);font-size:13px;font-weight:600}
.tag-soft{background:var(--c100);color:var(--c700)}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px;font-size:14px;color:var(--t3);padding-top:18px;border-top:1px solid var(--line)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C3D2D9}

/* 正文 */
.article-body{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:36px 34px 40px;box-shadow:var(--sh1);font-size:17px;line-height:1.8;color:var(--t2)}
.article-body p{margin:0 0 1.2em}
.article-body h2{font-size:24px;line-height:1.45;font-weight:700;color:var(--c900);margin:42px 0 16px;padding-left:14px;position:relative}
.article-body h2::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;background:var(--c500)}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:20px;line-height:1.5;font-weight:600;color:var(--c900);margin:28px 0 12px}
.article-body ul{margin:0 0 1.2em;padding-left:4px}
.article-body ul li{position:relative;padding-left:18px;margin-bottom:8px}
.article-body ul li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--c500)}
.article-body ol{margin:0 0 1.2em;padding-left:24px;list-style:decimal}
.article-body ol li{margin-bottom:8px;padding-left:4px}
.article-body ol li::marker{color:var(--c500);font-weight:600}
.article-body blockquote{margin:22px 0;padding:16px 20px;border-left:3px solid var(--c500);background:var(--c100);border-radius:0 12px 12px 0;color:var(--c900)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:20px 0 8px}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13px;color:var(--t3);text-align:center;margin-top:8px}
.article-body a{color:var(--c700);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--o600)}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:20px 0;display:block;overflow-x:auto;white-space:nowrap}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--c100);color:var(--c900);font-weight:600}
.article-body strong{color:var(--t1)}
.article-body hr{border:none;border-top:1px solid var(--line);margin:28px 0}

/* 空态 */
.empty-state{text-align:center;padding:56px 20px}
.empty-state svg{width:46px;height:46px;color:var(--c500);margin-bottom:16px}
.empty-state h3{font-size:20px;color:var(--c900);margin-bottom:10px}
.empty-state p{color:var(--t3);font-size:15px;margin-bottom:20px}

/* 标签行 */
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:28px}
.article-tags span.label{font-size:14px;color:var(--t3)}
.chip{display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:14px;color:var(--t2);transition:border-color var(--ease),color var(--ease),background var(--ease)}
.chip:hover{border-color:var(--c500);color:var(--c700);background:var(--c100);text-decoration:none}

/* 上下篇 */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px}
.post-nav a{display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px 22px;box-shadow:var(--sh1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.post-nav a:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:#CFE0E8;text-decoration:none}
.post-nav small{display:block;font-size:13px;color:var(--t3);margin-bottom:6px}
.post-nav strong{font-size:16px;font-weight:600;color:var(--c900)}

/* 侧栏 */
.article-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px 22px;box-shadow:var(--sh1)}
.aside-card h3{font-size:15px;font-weight:700;color:var(--c900);margin-bottom:14px}
.meta-list li{display:flex;justify-content:space-between;gap:12px;font-size:14px;padding:9px 0;border-bottom:1px dashed var(--line)}
.meta-list li:last-child{border-bottom:none;padding-bottom:0}
.meta-list span{color:var(--t3)}
.meta-list strong{color:var(--t1);font-weight:600;text-align:right}
.aside-links li{margin-bottom:6px}
.aside-links a{display:block;font-size:14px;color:var(--t2);padding:9px 12px;border-radius:10px;transition:background var(--ease),color var(--ease)}
.aside-links a:hover{background:var(--c100);color:var(--c900);text-decoration:none}

/* 相关推荐 */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);display:flex;flex-direction:column}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:#CFE0E8}
.card-cover{aspect-ratio:16/9;width:100%;object-fit:cover;background:var(--c100)}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;line-height:1.5;font-weight:600;color:var(--c900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body h3 a{color:inherit}
.card-body h3 a:hover{color:var(--c700);text-decoration:none}
.card-body p{font-size:14px;color:var(--t3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--t3)}

/* CTA 深色带 */
.cta-band{background:var(--c900);border-radius:18px;padding:44px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-60px;bottom:-80px;width:280px;height:280px;border:2px solid rgba(255,255,255,.08);border-radius:50%}
.cta-band h2{font-size:28px;line-height:1.35;color:#fff;font-weight:700;max-width:520px}
.cta-band p{margin-top:12px;color:#BFD8E1;font-size:15px;max-width:520px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}

/* 页脚 */
.site-footer{background:var(--c900);color:#C6DCE4;margin-top:90px;padding-top:60px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.f-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px}
.site-footer p{font-size:14px;line-height:1.8;color:#A9C6D1}
.site-footer h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.f-links li{margin-bottom:10px}
.f-links a{font-size:14px;color:#C6DCE4}
.f-links a:hover{color:#fff}
.f-contact li{font-size:14px;margin-bottom:12px;color:#A9C6D1}
.f-contact strong{display:block;color:#fff;font-weight:600;margin-bottom:2px}
.footer-bottom{margin-top:46px;border-top:1px solid rgba(255,255,255,.14);padding:20px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:#93B5C2}

/* 移动底部 Tab */
.mobile-tab{display:none}

@media (max-width:1023.98px){
  .main-nav,.header-cta{display:none}
  .nav-toggle{display:inline-flex}
  .drawer{display:block}
  body{padding-bottom:76px}
  .site-footer{padding-bottom:20px}
  .mobile-tab{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;height:56px;background:#fff;border-top:1px solid var(--line);z-index:70;padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -2px 12px -8px rgba(8,62,82,.35)}
  .mobile-tab a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:10px;color:var(--t3);position:relative}
  .mobile-tab a:hover{text-decoration:none;color:var(--c700)}
  .mobile-tab a.is-active{color:var(--c700);font-weight:600}
  .mobile-tab a.is-active::before{content:"";position:absolute;top:0;left:26%;right:26%;height:2px;border-radius:2px;background:var(--o500)}
  .mobile-tab svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:28px;padding-top:16px}
  .article-aside{position:static}
}

@media (max-width:1023.98px){
  .section{padding:56px 0}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px 28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}

@media (max-width:768px){
  .container{padding:0 20px}
  .article-head{padding:24px 20px}
  .article-body{padding:26px 20px 30px;font-size:17px}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:19px}
  .post-nav{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .section-head h2{font-size:24px}
}

@media (max-width:639.98px){
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-band h2{font-size:23px}
  .breadcrumb .current{max-width:200px}
  .btn{width:100%}
  .cta-actions{width:100%}
}

/* roulang page: category1 */
:root{
  --c900:#083E52; --c700:#0E5A75; --c500:#1C7E9C; --c100:#E6F1F6;
  --a600:#D94E1F; --a500:#F2622E; --a100:#FDEDE5;
  --green:#12A47A;
  --t1:#12262E; --t2:#3A525C; --t3:#667C86;
  --line:#E2E9ED; --bg:#F5F8FA; --card:#FFFFFF;
  --r-card:14px; --r-img:12px; --r-btn:10px; --r-pill:999px;
  --sh1:0 1px 2px rgba(8,62,82,.06);
  --sh2:0 12px 28px -12px rgba(8,62,82,.16);
  --s4:4px; --s8:8px; --s12:12px; --s16:16px; --s24:24px; --s32:32px; --s48:48px; --s64:64px; --s96:96px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",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:1.75;color:var(--t1);
  background:var(--bg);-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c500);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--c700);text-decoration:underline;text-underline-offset:3px}
button,input,textarea,select{font-family:inherit;font-size:16px;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:.2px}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--s32)}
:focus-visible{outline:2px solid var(--c500);outline-offset:2px;border-radius:4px}
.tabnum{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:16px;font-weight:600;cursor:pointer;text-decoration:none!important;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn-primary{background:var(--a500);color:#fff;box-shadow:0 8px 18px -10px rgba(217,78,31,.75)}
.btn-primary:hover{background:var(--a600);color:#fff;transform:translateY(-2px);box-shadow:0 14px 26px -14px rgba(217,78,31,.85)}
.btn-primary:active{transform:translateY(0);background:#B93F17}
.btn-ghost{background:transparent;color:var(--c700);border-color:var(--c500)}
.btn-ghost:hover{background:var(--c100);color:var(--c900);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0);background:#D6E9F1}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid transparent;
  transition:box-shadow .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 18px -14px rgba(8,62,82,.5)}
.header-inner{display:flex;align-items:center;gap:var(--s24);height:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--c900);font-weight:700;font-size:17px;text-decoration:none!important;flex:0 0 auto}
.brand:hover{color:var(--c900)}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--c500),var(--c900));
  position:relative;box-shadow:0 6px 14px -8px rgba(8,62,82,.9);
}
.brand-mark::after{
  content:"";position:absolute;inset:8px 7px;border-left:2px solid #fff;border-bottom:2px solid #fff;
  border-radius:2px;transform:skewX(-12deg);
}
.brand-text{white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.main-nav a{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:var(--r-pill);
  color:var(--t2);font-size:15px;font-weight:500;text-decoration:none!important;transition:background-color .18s ease,color .18s ease;
}
.main-nav a:hover{background:var(--c100);color:var(--c900)}
.main-nav a.is-active{background:var(--c100);color:var(--c900);font-weight:700}
.main-nav a:active{background:#D6E9F1}
.header-cta{flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:#fff;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c900);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c900);border-radius:2px;transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:#fff;padding:12px 0 20px}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{
  display:block;padding:12px var(--s32);color:var(--t2);font-size:16px;font-weight:500;text-decoration:none!important;
}
.mobile-drawer a:hover{background:var(--c100);color:var(--c900)}
.mobile-drawer a.is-active{color:var(--c900);font-weight:700;background:var(--c100)}
.mobile-drawer .drawer-cta{padding:14px var(--s32) 0}

/* ---------- 窄幅 Banner ---------- */
.page-banner{
  position:relative;overflow:hidden;min-height:268px;display:flex;align-items:center;
  background-image:linear-gradient(100deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.9) 42%,rgba(230,241,246,.68) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center right;
  border-bottom:1px solid var(--line);
}
.page-banner::after{
  content:"";position:absolute;right:-60px;bottom:-90px;width:340px;height:340px;border-radius:50%;
  border:1px solid rgba(28,126,156,.14);pointer-events:none;
}
.banner-inner{position:relative;z-index:1;padding:44px 0}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:14px;flex-wrap:wrap}
.breadcrumb a{color:var(--t3)}
.breadcrumb a:hover{color:var(--c700)}
.banner-inner h1{font-size:clamp(28px,4.4vw,40px);max-width:820px;color:var(--c900)}
.banner-inner p{margin-top:14px;max-width:660px;color:var(--t2);font-size:16px}
.banner-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--card);border:1px solid var(--line);color:var(--c700);font-size:13px;font-weight:600;
}
.tag-accent{background:var(--a100);border-color:#F7D6C6;color:var(--a600)}

/* ---------- 锚点目录 ---------- */
.anchor-nav{
  position:sticky;top:72px;z-index:40;background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--line);
}
.anchor-nav .container{display:flex;align-items:center;gap:10px;height:56px;overflow-x:auto;scrollbar-width:none}
.anchor-nav .container::-webkit-scrollbar{display:none}
.anchor-nav .label{color:var(--t3);font-size:13px;flex:0 0 auto}
.anchor-nav a{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--bg);color:var(--t2);font-size:14px;font-weight:600;white-space:nowrap;
  text-decoration:none!important;transition:background-color .18s ease,color .18s ease;
}
.anchor-nav a:hover{background:var(--c100);color:var(--c900)}
.anchor-nav a:active{background:#D6E9F1}

/* ---------- 通用板块 ---------- */
.section{padding:var(--s64) 0}
.section-head{max-width:760px;margin-bottom:var(--s32)}
.section-head h2{font-size:clamp(23px,3vw,30px);color:var(--c900)}
.section-head p{margin-top:12px;color:var(--t2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--a600);
  letter-spacing:1px;margin-bottom:10px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--a500);border-radius:2px}

/* ---------- 步骤区 ---------- */
.step-list{display:grid;gap:var(--s16)}
.step{
  display:grid;grid-template-columns:72px 1fr;gap:var(--s24);align-items:start;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:var(--s24) var(--s32);box-shadow:var(--sh1);transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.step:hover{box-shadow:var(--sh2);transform:translateY(-2px);border-color:#CFE2EA}
.step-no{
  font-size:30px;font-weight:700;color:var(--c100);line-height:1;
  font-variant-numeric:tabular-nums;padding-top:4px;letter-spacing:-1px;
  background:linear-gradient(180deg,var(--c500),var(--c900));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.step h3{font-size:20px;color:var(--c900);margin-bottom:8px}
.step p{color:var(--t2);font-size:15.5px}
.step ul{margin-top:12px;display:grid;gap:8px}
.step ul li{position:relative;padding-left:18px;color:var(--t2);font-size:15px}
.step ul li::before{
  content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:2px;
  background:var(--c500);transform:rotate(45deg);
}

/* ---------- 提示条 ---------- */
.tip{
  display:grid;grid-template-columns:36px 1fr;gap:var(--s16);align-items:start;
  background:var(--card);border:1px solid var(--line);border-left:3px solid var(--c500);
  border-radius:var(--r-card);padding:18px var(--s24);box-shadow:var(--sh1);
}
.tip .ic{
  width:32px;height:32px;border-radius:10px;background:var(--c100);display:flex;align-items:center;justify-content:center;
}
.tip .ic svg{width:18px;height:18px;stroke:var(--c700);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tip h4{font-size:16px;color:var(--c900);margin-bottom:4px}
.tip p{color:var(--t2);font-size:15px}
.tip.warn{border-left-color:var(--a500)}
.tip.warn .ic{background:var(--a100)}
.tip.warn .ic svg{stroke:var(--a600)}
.tip-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--s16)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:780px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--r-card);background:var(--card);margin-bottom:12px;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease}
.faq-item:hover{border-color:#CFE2EA;box-shadow:var(--sh1)}
.faq-item.is-open{border-color:#CFE2EA;box-shadow:var(--sh2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:58px;padding:14px var(--s24);background:none;border:0;cursor:pointer;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--c900);position:relative;
}
.faq-item.is-open .faq-q::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c500)}
.faq-q .plus{flex:0 0 auto;width:22px;height:22px;position:relative;transition:transform .22s ease}
.faq-q .plus::before,.faq-q .plus::after{content:"";position:absolute;background:var(--c500);border-radius:2px}
.faq-q .plus::before{left:3px;right:3px;top:10px;height:2px}
.faq-q .plus::after{top:3px;bottom:3px;left:10px;width:2px}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a p{padding:0 var(--s24) 20px;color:var(--t2);font-size:15.5px}

/* ---------- CTA 条 ---------- */
.cta-band{background:linear-gradient(120deg,var(--c900),var(--c700));color:#fff;border-radius:18px;overflow:hidden;position:relative}
.cta-band .inner{padding:var(--s48);display:grid;grid-template-columns:1fr auto;gap:var(--s32);align-items:center;position:relative;z-index:1}
.cta-band h2{font-size:clamp(22px,2.8vw,28px);color:#fff}
.cta-band p{margin-top:12px;color:#CBE4ED;max-width:620px;font-size:15.5px}
.cta-band .acts{display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.55)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  border:1px solid rgba(255,255,255,.16);
}

/* ---------- 分类互链卡 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s24);margin-top:var(--s32)}
.cat-card{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh1);text-decoration:none!important;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.cat-card:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:#CFE2EA}
.cat-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cat-card .body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.cat-card h3{font-size:17px;color:var(--c900)}
.cat-card p{font-size:14px;color:var(--t3);line-height:1.7}
.cat-card .more{margin-top:auto;font-size:14px;font-weight:700;color:var(--a600)}
.cat-card.is-current{border-color:var(--c500);border-width:2px}
.cat-card.is-current .more{color:var(--c700)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c900);color:#CBE0E8;margin-top:var(--s64)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:var(--s48);padding:var(--s64) 0 var(--s48)}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px}
.f-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:14px}
.f-brand .brand-mark{background:linear-gradient(135deg,#39A3C2,#0E5A75)}
.site-footer p{font-size:14px;color:#A9C6D2;line-height:1.8}
.f-links li{margin-bottom:10px}
.f-links a{color:#CBE0E8;font-size:14px;text-decoration:none!important}
.f-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.f-contact li{font-size:14px;color:#A9C6D2;margin-bottom:12px;line-height:1.7}
.f-contact strong{display:block;color:#fff;font-size:14px;font-weight:600;margin-bottom:2px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:18px 0 24px;display:flex;justify-content:space-between;
  gap:12px;flex-wrap:wrap;font-size:13px;color:#8FB2C0;
}

/* ---------- 移动端底部 Tab ---------- */
.mobile-tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;
  border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -6px 20px -16px rgba(8,62,82,.6);
}
.mobile-tabbar ul{display:grid;grid-template-columns:repeat(5,1fr)}
.mobile-tabbar a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:56px;color:var(--t3);font-size:10px;text-decoration:none!important;
}
.mobile-tabbar a svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.mobile-tabbar a.is-active{color:var(--c700);font-weight:600}
.mobile-tabbar a.is-active::before{content:"";position:absolute;top:0;left:18%;right:18%;height:2px;background:var(--c500);border-radius:0 0 2px 2px}
.mobile-tabbar a:active{background:var(--c100)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 var(--s24)}
  .main-nav,.header-cta,.nav-toggle{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{justify-content:space-between}
  .mobile-tabbar{display:block}
  body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}
  .anchor-nav{top:72px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--s32);padding:var(--s48) 0 var(--s32)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band .inner{grid-template-columns:1fr;padding:var(--s32)}
  .section{padding:var(--s48) 0}
}
@media (max-width:767px){
  .container{padding:0 var(--s16)}
  .site-footer{margin-top:var(--s48)}
  .page-banner{min-height:auto}
  .banner-inner{padding:32px 0}
  .step{grid-template-columns:1fr;gap:12px;padding:20px}
  .step-no{font-size:26px}
  .tip-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:var(--s24)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .anchor-nav .container{height:50px}
}
@media (max-width:519px){
  .btn{width:100%}
  .header-cta .btn,.cta-band .acts .btn{width:auto}
  .cta-band .acts{flex-direction:column;width:100%}
}

/* roulang page: category2 */
:root{
    --p900:#083E52; --p700:#0E5A75; --p500:#1C7E9C; --p100:#E6F1F6;
    --a600:#D94E1F; --a500:#F2622E; --a100:#FDEDE5;
    --green:#12A47A;
    --t1:#12262E; --t2:#3A525C; --t3:#667C86;
    --line:#E2E9ED; --bg:#F5F8FA; --card:#FFFFFF;
    --r-card:14px; --r-img:12px; --r-btn:10px;
    --sh1:0 1px 2px rgba(8,62,82,.06);
    --sh2:0 12px 28px -12px rgba(8,62,82,.16);
    --ease:180ms ease;
  }
  *,*::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",system-ui,sans-serif;
    font-size:16px;line-height:1.75;color:var(--t1);background:var(--bg);
    font-variant-numeric:tabular-nums;
  }
  img{max-width:100%;display:block;height:auto}
  a{color:var(--p700);text-decoration:none;transition:color var(--ease),background-color var(--ease)}
  a:hover{color:var(--p900);text-decoration:underline;text-underline-offset:3px}
  button,input,textarea,select{font:inherit;color:inherit}
  h1,h2,h3,h4{margin:0;color:var(--t1);letter-spacing:.2px;font-family:inherit}
  h1{font-size:clamp(28px,5vw,42px);line-height:1.24;font-weight:700}
  h2{font-size:clamp(23px,3vw,30px);line-height:1.32;font-weight:700}
  h3{font-size:20px;line-height:1.45;font-weight:600}
  h4{font-size:16px;font-weight:600}
  p{margin:0 0 16px}
  ul,ol{margin:0;padding:0;list-style:none}
  svg{display:block}
  :focus-visible{outline:2px solid var(--p500);outline-offset:2px;border-radius:4px}
  .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 22px;
    border-radius:var(--r-btn);border:1px solid transparent;background:transparent;cursor:pointer;
    font-size:15px;font-weight:600;text-decoration:none;white-space:nowrap;
    transition:transform var(--ease),background-color var(--ease),box-shadow var(--ease),color var(--ease),border-color var(--ease);
  }
  .btn-primary{background:var(--a500);color:#fff;box-shadow:var(--sh1)}
  .btn-primary:hover{background:var(--a600);color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:var(--sh2)}
  .btn-primary:active{transform:translateY(0);background:var(--a600)}
  .btn-ghost{border-color:var(--p500);color:var(--p700);background:transparent}
  .btn-ghost:hover{background:var(--p100);color:var(--p900);text-decoration:none;transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-onDark{background:#fff;color:var(--p900)}
  .btn-onDark:hover{background:var(--p100);color:var(--p900);text-decoration:none;transform:translateY(-2px)}
  .btn-line-light{border-color:rgba(255,255,255,.6);color:#fff}
  .btn-line-light:hover{background:rgba(255,255,255,.12);color:#fff;text-decoration:none;transform:translateY(-2px)}

  /* 顶部导航 */
  .site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid transparent;transition:border-color .2s ease,box-shadow .2s ease}
  .site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh1)}
  .header-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
  .brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--p900);letter-spacing:.4px}
  .brand:hover{text-decoration:none;color:var(--p900)}
  .brand-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(140deg,var(--p500),var(--p900));position:relative;flex:0 0 30px}
  .brand-mark::after{content:"";position:absolute;left:8px;right:8px;top:9px;height:12px;border:2px solid rgba(255,255,255,.9);border-bottom-color:transparent;border-radius:8px 8px 0 0}
  .brand-mark::before{content:"";position:absolute;left:12px;right:12px;bottom:7px;height:2px;background:var(--a500);border-radius:2px}
  .main-nav{display:flex;align-items:center;gap:4px}
  .main-nav a{position:relative;padding:10px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--t2)}
  .main-nav a:hover{background:var(--p100);color:var(--p900);text-decoration:none}
  .main-nav a.is-active{background:var(--p100);color:var(--p900);font-weight:600}
  .main-nav a.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;background:var(--a500)}
  .nav-right{display:flex;align-items:center;gap:12px}
  .nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;color:var(--p900)}
  .nav-toggle:hover{background:var(--p100);border-color:var(--p500)}
  .drawer{position:fixed;top:72px;left:0;right:0;bottom:0;background:#fff;z-index:55;padding:24px;overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-10px);transition:opacity var(--ease),transform var(--ease),visibility var(--ease)}
  .drawer.is-open{opacity:1;visibility:visible;transform:none}
  .drawer nav{display:grid;gap:6px;margin-bottom:20px}
  .drawer nav a{display:block;padding:14px 16px;border-radius:12px;background:var(--bg);color:var(--t1);font-size:16px;font-weight:500}
  .drawer nav a:hover{background:var(--p100);color:var(--p900);text-decoration:none}
  .drawer nav a.is-active{background:var(--p100);color:var(--p900);font-weight:600;box-shadow:inset 3px 0 0 var(--a500)}
  .drawer .btn{width:100%}

  /* 移动端底部 Tab */
  .tabbar{display:none}
  @media (max-width:1023px){
    .main-nav,.nav-cta{display:none}
    .nav-toggle{display:inline-flex}
    .container{padding:0 20px}
    .tabbar{
      display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;height:56px;
      background:#fff;border-top:1px solid var(--line);z-index:70;
      padding-bottom:env(safe-area-inset-bottom);
    }
    .tabbar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;font-size:10px;color:var(--t3);position:relative}
    .tabbar a svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.6}
    .tabbar a:hover{color:var(--p700);text-decoration:none}
    .tabbar a.is-active{color:var(--p700);font-weight:600}
    .tabbar a.is-active::before{content:"";position:absolute;top:0;width:26px;height:2px;border-radius:2px;background:var(--a500)}
    body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}
  }

  /* 页面标题区 */
  .page-head{background:#fff;border-bottom:1px solid var(--line);padding:46px 0 38px}
  .crumb{font-size:13px;color:var(--t3);margin-bottom:14px}
  .crumb a{color:var(--t3)}
  .crumb a:hover{color:var(--p700)}
  .crumb span{color:var(--t2)}
  .eyebrow{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;border-radius:999px;background:var(--p100);
    color:var(--p900);font-size:13px;font-weight:600;margin-bottom:16px}
  .eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--a500);display:inline-block}
  .page-head h1{max-width:860px}
  .page-head .lead{max-width:760px;margin-top:14px;font-size:16px;color:var(--t2)}
  .chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
  .chip{display:inline-flex;align-items:center;gap:8px;height:34px;padding:0 15px;border-radius:999px;
    background:var(--p100);color:var(--p900);font-size:14px;font-weight:500}
  .chip.alt{background:var(--a100);color:var(--a600)}
  .chip svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8}

  /* 两栏布局 */
  .split{display:grid;grid-template-columns:1fr;gap:28px;margin:44px 0 0}
  @media (min-width:1024px){.split{grid-template-columns:260px minmax(0,1fr);gap:48px;margin-top:56px}}
  .side-toc{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh1)}
  @media (min-width:1024px){.side-toc{position:sticky;top:96px;align-self:start}}
  .side-toc h2{font-size:15px;font-weight:700;color:var(--t1);margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid var(--line)}
  .side-toc ol{counter-reset:toc;display:grid;gap:2px}
  .side-toc li{counter-increment:toc}
  .side-toc a{display:flex;gap:10px;align-items:baseline;padding:9px 10px;border-radius:9px;font-size:14.5px;color:var(--t2)}
  .side-toc a::before{content:counter(toc,decimal-leading-zero);font-size:12px;color:var(--t3);font-weight:600}
  .side-toc a:hover{background:var(--p100);color:var(--p900);text-decoration:none}
  .side-toc a.is-current{background:var(--p100);color:var(--p900);font-weight:600}
  .side-hint{margin-top:16px;padding:14px;border-radius:10px;background:var(--bg);font-size:13.5px;color:var(--t2);line-height:1.7}

  .panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh1);padding:32px}
  @media (max-width:639px){.panel{padding:22px}}
  .flow section + section{margin-top:44px;padding-top:36px;border-top:1px solid var(--line)}
  .flow h2{display:flex;gap:12px;align-items:flex-start;margin-bottom:14px}
  .flow h2::before{content:"";flex:0 0 4px;width:4px;height:22px;border-radius:2px;background:var(--p500);margin-top:6px}
  .flow h3{margin:26px 0 10px;color:var(--p900)}
  .flow p{color:var(--t2)}
  .flow ul.dot{display:grid;gap:9px;margin:6px 0 18px}
  .flow ul.dot li{position:relative;padding-left:20px;color:var(--t2)}
  .flow ul.dot li::before{content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--p500)}
  .flow strong{color:var(--t1)}

  .note-card{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border-radius:12px;background:var(--p100);
    border-left:3px solid var(--p500);margin:20px 0}
  .note-card.warn{background:var(--a100);border-left-color:var(--a500)}
  .note-card.ok{background:#EAF8F3;border-left-color:var(--green)}
  .note-card strong{display:block;margin-bottom:4px;color:var(--t1);font-size:15.5px}
  .note-card p{margin:0;font-size:15px;color:var(--t2)}
  .note-ico{flex:0 0 24px;color:var(--p700)}
  .note-card.warn .note-ico{color:var(--a600)}
  .note-card.ok .note-ico{color:var(--green)}
  .note-ico svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.7}

  .fig{margin:24px 0}
  .fig img{width:100%;border-radius:var(--r-img)}
  .fig figcaption{margin-top:10px;font-size:13px;color:var(--t3)}

  /* 保护项一览 */
  .guard-grid{display:grid;grid-template-columns:1fr;gap:14px;margin:22px 0 6px}
  @media (min-width:640px){.guard-grid{grid-template-columns:repeat(2,1fr)}}
  .guard{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff;transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease)}
  .guard:hover{box-shadow:var(--sh2);transform:translateY(-2px);border-color:#D6E2E8}
  .guard h3{font-size:16px;margin-bottom:6px;display:flex;align-items:center;gap:8px}
  .guard h3 svg{width:18px;height:18px;stroke:var(--p500);fill:none;stroke-width:1.8}
  .guard p{margin:0;font-size:14.5px;color:var(--t2)}

  /* 优先级清单 */
  .pri-wrap{margin-top:44px}
  .pri-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:18px}
  .pri-head p{margin:0;color:var(--t2);font-size:15px;max-width:620px}
  .pri-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh1);overflow:hidden}
  .pri-row{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-start;padding:20px 24px}
  .pri-row + .pri-row{border-top:1px solid var(--line)}
  .pri-row .badge{flex:0 0 auto}
  .pri-row .txt{flex:1 1 320px;min-width:0}
  .pri-row .txt strong{display:block;font-size:16px;margin-bottom:4px}
  .pri-row .txt span{font-size:14.5px;color:var(--t2)}
  .badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12.5px;font-weight:600}
  .badge-now{background:var(--a100);color:var(--a600)}
  .badge-week{background:var(--p100);color:var(--p900)}
  .badge-long{background:#EAF8F3;color:#0C8060}

  /* CTA 条 */
  .cta-band{margin:64px 0 0;background:var(--p900);border-radius:18px;padding:40px;color:#fff;display:grid;gap:24px;position:relative;overflow:hidden}
  @media (min-width:1024px){.cta-band{grid-template-columns:minmax(0,1fr) auto;align-items:center;padding:44px 48px}}
  @media (max-width:639px){.cta-band{padding:28px}}
  .cta-band::after{content:"";position:absolute;right:-60px;bottom:-120px;width:320px;height:320px;border:1px solid rgba(255,255,255,.14);border-radius:50%}
  .cta-band h2{color:#fff;margin-bottom:10px}
  .cta-band p{color:rgba(255,255,255,.82);margin:0;max-width:620px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}

  /* 分类互链 */
  .cat-block{margin:64px 0 0}
  .cat-block > h2{margin-bottom:8px}
  .cat-block > p{color:var(--t2);max-width:680px}
  .cat-cards{display:grid;grid-template-columns:1fr;gap:20px;margin-top:24px}
  @media (min-width:640px){.cat-cards{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.cat-cards{grid-template-columns:repeat(4,1fr)}}
  .cat-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--sh1);transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease)}
  .cat-card:hover{box-shadow:var(--sh2);transform:translateY(-2px);border-color:#D6E2E8;text-decoration:none}
  .cat-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
  .cat-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
  .cat-card h3{font-size:16.5px;color:var(--p900)}
  .cat-card p{margin:0;font-size:14px;color:var(--t2);flex:1}
  .cat-card .more{font-size:14px;font-weight:600;color:var(--a600);display:inline-flex;align-items:center;gap:6px}
  .cat-card .more svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}
  .cat-card.is-current{border-color:var(--p500);box-shadow:0 0 0 2px rgba(28,126,156,.14),var(--sh1)}

  /* 页脚 */
  .site-footer{background:var(--p900);color:rgba(255,255,255,.82);margin-top:72px;padding:56px 0 0}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:40px}
  @media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
  .f-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:#fff;margin-bottom:14px}
  .f-brand .brand-mark{background:linear-gradient(140deg,#2E94B4,#083E52)}
  .site-footer p{margin:0;font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.72);max-width:360px}
  .site-footer h4{color:#fff;font-size:15px;margin-bottom:16px}
  .f-links,.f-contact{display:grid;gap:10px}
  .f-links a{color:rgba(255,255,255,.78);font-size:14.5px}
  .f-links a:hover{color:#fff;text-decoration:underline}
  .f-contact li{font-size:14.5px;color:rgba(255,255,255,.72);line-height:1.7}
  .f-contact strong{display:block;color:#fff;font-size:14px;font-weight:600}
  .footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13.5px;color:rgba(255,255,255,.62)}

  @media (max-width:639px){
    h1{font-size:28px}
    .page-head{padding:32px 0 28px}
    .panel{padding:22px 18px}
    .pri-row{padding:18px}
    .cta-band{margin-top:48px}
  }

/* roulang page: category3 */
:root{
  --c900:#083E52;--c700:#0E5A75;--c500:#1C7E9C;--c100:#E6F1F6;
  --a600:#D94E1F;--a500:#F2622E;--a100:#FDEDE5;
  --green:#12A47A;
  --t1:#12262E;--t2:#3A525C;--t3:#667C86;
  --line:#E2E9ED;--bg:#F5F8FA;--card:#FFFFFF;
  --r-card:14px;--r-img:12px;--r-btn:10px;
  --sh1:0 1px 2px rgba(8,62,82,.06);
  --sh2:0 12px 28px -12px rgba(8,62,82,.16);
  --dur:180ms;
}
*,*::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",system-ui,sans-serif;font-size:16px;line-height:1.75;color:var(--t1);background:var(--bg)}
img{max-width:100%;display:block}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--c700);text-decoration:none;transition:color var(--dur) ease}
a:hover{color:var(--c900)}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--c500);outline-offset:2px}
.num{font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:88px 0}}
section[id]{scroll-margin-top:96px}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform var(--dur) ease,box-shadow var(--dur) ease,background-color var(--dur) ease,color var(--dur) ease;white-space:nowrap}
.btn-primary{background:var(--a500);color:#fff;box-shadow:0 8px 18px -10px rgba(217,78,31,.75)}
.btn-primary:hover{background:var(--a600);color:#fff;transform:translateY(-2px);box-shadow:0 12px 24px -12px rgba(217,78,31,.85)}
.btn-outline{background:transparent;border-color:var(--c500);color:var(--c700)}
.btn-outline:hover{background:var(--c100);color:var(--c900);transform:translateY(-2px)}
.btn-ghost-light{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost-light:hover{background:rgba(255,255,255,.2);color:#fff;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-block{width:100%}

/* ============ 头部导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid transparent;transition:box-shadow var(--dur) ease,border-color var(--dur) ease}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 2px 12px rgba(8,62,82,.07)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;color:var(--t1)}
.brand:hover{color:var(--t1)}
.brand-mark{width:30px;height:30px;flex:0 0 auto;border-radius:9px;background:linear-gradient(135deg,var(--c500),var(--c900));position:relative}
.brand-mark::after{content:"";position:absolute;top:7px;right:7px;bottom:7px;left:11px;border:2px solid #fff;border-left:0;border-radius:0 7px 7px 0}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.2px}
.brand-text em{font-style:normal;font-size:12px;color:var(--t3)}
.main-nav{display:none}
.header-cta{display:none}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--c700);cursor:pointer;transition:background-color var(--dur) ease,border-color var(--dur) ease}
.nav-toggle:hover{background:var(--c100);border-color:var(--c500)}
.nav-toggle svg{width:22px;height:22px}
@media (min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:2px}
  .main-nav a{padding:8px 14px;border-radius:999px;font-size:15px;font-weight:500;color:var(--t2);transition:background-color var(--dur) ease,color var(--dur) ease}
  .main-nav a:hover{background:var(--c100);color:var(--c700)}
  .main-nav a.is-active{background:var(--c100);color:var(--c900);font-weight:600}
  .header-cta{display:block}
  .header-cta .btn{height:42px;padding:0 18px;font-size:14px}
  .nav-toggle{display:none}
}

/* 移动抽屉 */
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(86vw,352px);background:#fff;z-index:70;padding:20px;box-shadow:-18px 0 40px -20px rgba(8,62,82,.4);transform:translateX(102%);visibility:hidden;transition:transform 220ms ease,visibility 220ms ease;overflow-y:auto}
.drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:14px}
.drawer-head span{font-weight:700;color:var(--c900)}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:10px;color:var(--t2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color var(--dur) ease}
.drawer-close:hover{background:var(--c100)}
.drawer nav{display:flex;flex-direction:column;gap:6px;margin-bottom:18px}
.drawer nav a{padding:12px 14px;border-radius:10px;color:var(--t2);font-weight:500;border:1px solid transparent;transition:background-color var(--dur) ease,color var(--dur) ease}
.drawer nav a:hover{background:var(--c100);color:var(--c700);border-color:var(--c100)}
.drawer nav a.is-active{background:var(--c100);color:var(--c900);font-weight:600}
body.is-locked{overflow:hidden}

/* ============ 移动底部 Tab ============ */
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:65;display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
.tabbar a{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;height:56px;font-size:10px;color:var(--t3);transition:color var(--dur) ease}
.tabbar a svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.tabbar a:hover{color:var(--c700)}
.tabbar a.is-active{color:var(--c700);font-weight:600}
.tabbar a.is-active::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:32px;height:2px;border-radius:0 0 3px 3px;background:var(--c500)}
@media (min-width:1024px){.tabbar{display:none}}
@media (max-width:1023px){body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}}

/* ============ 页面横幅 ============ */
.page-banner{position:relative;min-height:266px;display:flex;align-items:center;background-image:url("/assets/images/backpic/back-2.png");background-size:cover;background-position:center;color:#fff;overflow:hidden}
.page-banner::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,62,82,.94) 0%,rgba(14,90,117,.82) 48%,rgba(28,126,156,.42) 100%)}
.banner-deco{position:absolute;right:-40px;bottom:-70px;width:420px;height:260px;opacity:.08;pointer-events:none}
.banner-inner{position:relative;z-index:1;padding:44px 0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:14px}
.crumb a{color:rgba(255,255,255,.86)}
.crumb a:hover{color:#fff}
.page-banner h1{font-size:clamp(26px,4.6vw,42px);font-weight:700;line-height:1.3;max-width:820px}
.page-banner p{margin-top:14px;max-width:720px;font-size:16px;line-height:1.8;color:rgba(255,255,255,.9)}
.banner-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:20px}
.banner-meta li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.88)}
.banner-meta li b{color:#fff;font-weight:600}

/* ============ 通用板块头 ============ */
.sec-head{max-width:760px;margin-bottom:32px}
.sec-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--c700);background:var(--c100);border-radius:999px;padding:5px 14px;margin-bottom:14px}
.sec-head h2{font-size:clamp(24px,3.4vw,32px);font-weight:700;line-height:1.35;color:var(--c900)}
.sec-head p{margin-top:12px;color:var(--t2);font-size:15.5px}
.sec-head--split{max-width:none;display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px}

/* ============ 筛选 chips ============ */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--t2);font-size:14px;font-weight:500;transition:background-color var(--dur) ease,border-color var(--dur) ease,color var(--dur) ease,transform var(--dur) ease,box-shadow var(--dur) ease}
.chip:hover{border-color:var(--c500);color:var(--c700);background:var(--c100);transform:translateY(-1px)}
.chip.is-on{background:var(--c900);border-color:var(--c900);color:#fff}
.chip.is-on:hover{background:var(--c700);border-color:var(--c700);color:#fff}
.chip:active{transform:translateY(0)}
.chip svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* ============ Bento 卡片区 ============ */
.bento{display:grid;grid-template-columns:1fr;gap:20px}
.bcard{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh1);transition:transform var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease}
.bcard:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:#CFE0E8}
.bcard h3{font-size:20px;font-weight:600;color:var(--c900);line-height:1.45;margin-bottom:10px}
.bcard p{color:var(--t2);font-size:15px}
.bcard .kicker{display:inline-flex;align-self:flex-start;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:var(--c100);color:var(--c700);font-size:12.5px;font-weight:600;margin-bottom:14px}
.bcard .kicker--warm{background:var(--a100);color:var(--a600)}
.bcard .kicker--green{background:#E4F7F0;color:#0C7D5C}
.bcard-lg{background:linear-gradient(180deg,#FBFDFE 0%,#FFFFFF 60%)}
.step-list{margin-top:16px;display:flex;flex-direction:column;gap:12px}
.step-list li{display:grid;grid-template-columns:26px 1fr;gap:12px;align-items:start}
.step-list li span.i{display:flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:8px;background:var(--c100);color:var(--c700);font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}
.step-list li p{font-size:14.5px;color:var(--t2)}
.bcard-media{margin-top:18px;border-radius:var(--r-img);overflow:hidden}
.bcard-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.bcard-wide .wide-grid{display:grid;grid-template-columns:1fr;gap:20px;align-items:center}
.plain-list{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.plain-list li{position:relative;padding-left:18px;font-size:15px;color:var(--t2)}
.plain-list li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:2px;background:var(--a500)}
.tagrow{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:var(--bg);border:1px solid var(--line);color:var(--t3);font-size:12.5px}
@media (min-width:768px){
  .bento{grid-template-columns:repeat(2,1fr);gap:24px}
  .bcard-lg{grid-column:span 2}
  .bcard-wide{grid-column:span 2}
  .bcard-wide .wide-grid{grid-template-columns:1.1fr .9fr}
}
@media (min-width:1024px){
  .bento{grid-template-columns:repeat(3,1fr)}
  .bcard-lg{grid-column:span 1;grid-row:span 2}
  .bcard-wide{grid-column:span 2}
}

/* ============ 分步说明 ============ */
.steps{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--line)}
.steps .row-item{display:grid;grid-template-columns:56px 1fr;gap:18px;padding:24px 0;border-bottom:1px solid var(--line);align-items:start}
.steps .row-item .idx{font-size:28px;font-weight:700;color:var(--c100);line-height:1;font-variant-numeric:tabular-nums}
.steps .row-item h3{font-size:19px;font-weight:600;color:var(--c900);margin-bottom:6px}
.steps .row-item p{color:var(--t2);font-size:15px}
.steps .row-item:hover .idx{color:var(--c500)}
@media (min-width:768px){.steps .row-item{grid-template-columns:72px 1fr;gap:24px}}

/* ============ 规格对比表 ============ */
.table-wrap{border:1px solid var(--line);border-radius:var(--r-card);background:#fff;overflow:hidden;box-shadow:var(--sh1)}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.spec{width:100%;min-width:860px;border-collapse:collapse}
table.spec caption{text-align:left;padding:18px 20px 0;font-size:14px;color:var(--t3)}
table.spec th,table.spec td{padding:16px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--t2)}
table.spec thead th{background:var(--c100);color:var(--c900);font-size:13.5px;font-weight:600;white-space:nowrap;border-bottom-color:#D2E5ED}
table.spec tbody tr:last-child td{border-bottom:0}
table.spec tbody tr:hover td{background:#FAFCFD}
table.spec td:first-child{color:var(--c900);font-weight:600;white-space:nowrap}
.scroll-hint{margin-top:10px;font-size:13px;color:var(--t3)}
@media (min-width:1024px){.scroll-hint{display:none}}

/* ============ 提示条 ============ */
.tips{display:grid;grid-template-columns:1fr;gap:16px}
.tip{display:grid;grid-template-columns:40px 1fr;gap:14px;align-items:start;background:var(--card);border:1px solid var(--line);border-left:3px solid var(--c500);border-radius:12px;padding:20px}
.tip .ico{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:var(--c100);color:var(--c700)}
.tip .ico svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tip h3{font-size:16.5px;font-weight:600;color:var(--c900);margin-bottom:4px}
.tip p{font-size:14.5px;color:var(--t2)}
.tip.warm{border-left-color:var(--a500)}
.tip.warm .ico{background:var(--a100);color:var(--a600)}
.tip.green{border-left-color:var(--green)}
.tip.green .ico{background:#E4F7F0;color:#0C7D5C}
@media (min-width:768px){.tips{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.tips{grid-template-columns:repeat(3,1fr)}}

/* ============ FAQ ============ */
.faq-wrap{max-width:780px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;transition:border-color var(--dur) ease,box-shadow var(--dur) ease}
.faq-item:hover{border-color:#CFE0E8}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:14px 18px;cursor:pointer;font-size:16px;font-weight:600;color:var(--c900);list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;line-height:1;color:var(--c500);transition:transform 200ms ease}
.faq-item[open]{border-color:var(--c500);box-shadow:var(--sh2)}
.faq-item[open] summary{border-left:3px solid var(--c500);padding-left:15px}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 18px 18px;color:var(--t2);font-size:15px}
.faq-body p+p{margin-top:10px}

/* ============ CTA 条 ============ */
.cta-band{background:var(--c900);color:#fff;border-radius:18px;padding:32px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px}
.cta-band h2{font-size:clamp(21px,3vw,27px);font-weight:700;line-height:1.4}
.cta-band p{margin-top:8px;color:#C6DFE8;font-size:15px;max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (min-width:1024px){.cta-band{padding:44px 48px}}

/* ============ 分类互链 ============ */
.cat-grid{display:grid;grid-template-columns:1fr;gap:18px}
.cat-card{display:flex;flex-direction:column;justify-content:space-between;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh1);transition:transform var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease}
.cat-card:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:var(--c500)}
.cat-card h3{font-size:17.5px;font-weight:600;color:var(--c900);margin-bottom:8px}
.cat-card p{font-size:14.5px;color:var(--t2)}
.cat-card .go{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:600;color:var(--c700)}
.cat-card .go svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform var(--dur) ease}
.cat-card:hover .go svg{transform:translateX(3px)}
@media (min-width:640px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.cat-grid{grid-template-columns:repeat(4,1fr)}}

/* ============ 页脚 ============ */
.site-footer{background:var(--c900);color:#C7DFE8;margin-top:64px;padding:56px 0 0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
.f-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;margin-bottom:12px}
.f-brand .brand-mark{background:linear-gradient(135deg,#3FA3C2,#0E5A75)}
.site-footer h4{font-size:15px;color:#fff;font-weight:600;margin:0 0 14px}
.f-links li,.f-contact li{margin-bottom:10px;line-height:1.7}
.f-links a{color:#C7DFE8;transition:color var(--dur) ease}
.f-links a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.f-contact li strong{display:block;color:#fff;font-weight:600}
.footer-bottom{margin-top:36px;padding:18px 0 26px;border-top:1px solid rgba(255,255,255,.16);display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;font-size:13px;color:#9EC3D0}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}

/* roulang page: category4 */
:root{
  --p900:#083E52; --p700:#0E5A75; --p500:#1C7E9C; --p100:#E6F1F6;
  --a600:#D94E1F; --a500:#F2622E; --a100:#FDEDE5;
  --green:#12A47A;
  --t1:#12262E; --t2:#3A525C; --t3:#667C86;
  --line:#E2E9ED; --bg:#F5F8FA; --card:#FFFFFF;
  --r-card:14px; --r-img:12px; --r-btn:10px;
  --sh1:0 1px 2px rgba(8,62,82,.06);
  --sh2:0 12px 28px -12px rgba(8,62,82,.16);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;padding:0;font-family:var(--font);font-size:16px;line-height:1.75;color:var(--t1);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:var(--p700);text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease}
a:hover{color:var(--a600)}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4{line-height:1.35;color:var(--t1);font-weight:700;margin:0}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.num,.tabular{font-variant-numeric:tabular-nums}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--p700);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0;color:#fff}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:640px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 32px}}
:focus-visible{outline:2px solid var(--p500);outline-offset:2px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .18s ease,background-color .18s ease,border-color .18s ease,box-shadow .18s ease;white-space:nowrap}
.btn-primary{background:var(--a500);color:#fff;box-shadow:0 6px 16px -8px rgba(242,98,46,.75)}
.btn-primary:hover{background:var(--a600);color:#fff;transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);background:#B94117}
.btn-outline{background:transparent;color:var(--p700);border-color:var(--p500)}
.btn-outline:hover{background:var(--p100);color:var(--p900);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0);background:#D6E8EF}
.btn-light{background:#fff;color:var(--p900);border-color:#fff}
.btn-light:hover{background:#E6F1F6;color:var(--p900);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- badges / chips ---------- */
.badge{display:inline-flex;align-items:center;gap:8px;padding:5px 14px;border-radius:999px;background:var(--p100);color:var(--p700);font-size:13px;font-weight:600;letter-spacing:.02em}
.badge-dot{width:6px;height:6px;border-radius:50%;background:var(--a500)}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chip{display:inline-flex;align-items:center;padding:8px 15px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--t2);font-size:14px;transition:transform .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease}
.chip:hover{border-color:var(--p500);color:var(--p700);transform:translateY(-2px);box-shadow:var(--sh1)}
.chip:active{transform:translateY(0)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:120;background:#fff;border-bottom:1px solid transparent;transition:border-color .2s ease,box-shadow .2s ease}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 1px 3px rgba(8,62,82,.08)}
.header-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{position:relative;width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--p700),var(--p500));flex:0 0 30px}
.brand-mark::after{content:"";position:absolute;left:7px;top:9px;width:16px;height:12px;border:2px solid rgba(255,255,255,.9);border-radius:8px}
.brand-text{font-size:17px;font-weight:700;color:var(--p900);letter-spacing:.01em;white-space:nowrap}
.main-nav{display:none}
@media (min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:4px;margin-left:12px}
  .main-nav a{padding:8px 14px;border-radius:999px;font-size:15px;color:var(--t2);font-weight:500}
  .main-nav a:hover{background:var(--p100);color:var(--p700)}
  .main-nav a.is-active{background:var(--p100);color:var(--p700);font-weight:700}
  .main-nav a:active{background:#D6E8EF}
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.header-actions .btn{display:none}
@media (min-width:1024px){.header-actions .btn{display:inline-flex}}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--p700);cursor:pointer;transition:background-color .18s ease,border-color .18s ease}
.nav-toggle:hover{background:var(--p100);border-color:#CFE2EA}
@media (min-width:1024px){.nav-toggle{display:none}}
.nav-toggle svg{width:22px;height:22px}
.drawer{position:fixed;left:0;right:0;top:72px;z-index:110;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 18px 30px -20px rgba(8,62,82,.35);padding:16px 20px 22px}
.drawer[hidden]{display:none}
.drawer a.drawer-link{display:block;padding:13px 14px;border-radius:10px;color:var(--t2);font-size:16px;font-weight:600}
.drawer a.drawer-link:hover{background:var(--p100);color:var(--p700)}
.drawer a.drawer-link.is-active{background:var(--p100);color:var(--p700)}
.drawer .btn{margin-top:12px}
@media (min-width:1024px){.drawer{display:none!important}}

/* ---------- mobile tabbar ---------- */
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:130;display:flex;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
.tabbar a{position:relative;flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:56px;color:var(--t3);font-size:10px;line-height:1}
.tabbar a svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.tabbar a.is-active{color:var(--p700)}
.tabbar a.is-active::before{content:"";position:absolute;top:0;left:22%;right:22%;height:2px;border-radius:0 0 2px 2px;background:var(--p500)}
.tabbar a:hover{color:var(--p700);background:#F3F8FA}
.tabbar a:active{background:var(--p100)}
@media (min-width:1024px){.tabbar{display:none}}
@media (max-width:1023px){body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}}

/* ---------- page head ---------- */
.page-head{position:relative;overflow:hidden;background:#fff;border-bottom:1px solid var(--line);padding:36px 0 44px}
.head-arc{position:absolute;right:-90px;bottom:-140px;width:420px;height:420px;opacity:.08;pointer-events:none}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:18px}
.crumbs a{color:var(--t3)}
.crumbs a:hover{color:var(--p700)}
.crumbs span.sep{color:#B9C8CF}
.page-head h1{font-size:clamp(28px,5vw,44px);font-weight:700;margin:16px 0 14px;max-width:900px}
.lead{font-size:17px;color:var(--t2);max-width:720px;line-height:1.75}
.faq-search{display:flex;gap:10px;align-items:center;max-width:660px;margin-top:26px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:8px;box-shadow:var(--sh1);transition:border-color .18s ease,box-shadow .18s ease}
.faq-search:focus-within{border-color:var(--p500);box-shadow:0 0 0 4px rgba(28,126,156,.12)}
.faq-search input{flex:1 1 auto;min-width:0;height:44px;border:0;background:transparent;padding:0 14px;border-radius:10px;outline:none}
.faq-search input::placeholder{color:#9AAEB7}
.faq-search input:focus{background:var(--p100)}
.search-note{margin-top:12px;font-size:14px;color:var(--p700);background:var(--p100);border-radius:10px;padding:10px 14px;max-width:660px}
.search-note[hidden]{display:none}
@media (max-width:639px){
  .faq-search{flex-direction:column;align-items:stretch}
  .faq-search .btn{width:100%}
  .page-head{padding:24px 0 32px}
}

/* ---------- section frame ---------- */
.section{padding:56px 0}
@media (min-width:1024px){.section{padding:72px 0}}
.sec-head{margin-bottom:28px;max-width:760px}
.sec-head h2{font-size:clamp(22px,3.4vw,30px);margin-bottom:10px}
.sec-head p{color:var(--t2);font-size:16px}

/* ---------- faq layout ---------- */
.faq-layout{display:grid;grid-template-columns:1fr;gap:32px;align-items:start}
@media (min-width:1024px){.faq-layout{grid-template-columns:minmax(0,1fr) 336px;gap:44px}}
.faq-side{display:grid;gap:20px}
@media (min-width:1024px){.faq-side{position:sticky;top:92px}}
.faq-group{--faq-pad:24px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:6px var(--faq-pad) 12px;box-shadow:var(--sh1);margin-bottom:24px}
@media (max-width:639px){.faq-group{--faq-pad:16px}}
.faq-group-head{display:flex;gap:14px;align-items:flex-start;padding:20px 0 16px;border-bottom:1px solid var(--line)}
.faq-group-num{flex:0 0 auto;font-size:13px;font-weight:700;color:var(--p500);letter-spacing:.1em;padding-top:5px}
.faq-group-head h2{font-size:20px;margin-bottom:4px}
.faq-group-head p{font-size:14px;color:var(--t3);line-height:1.65}
.acc-item{position:relative;border-bottom:1px solid var(--line)}
.acc-item:last-child{border-bottom:0}
.acc-item::before{content:"";position:absolute;left:calc(var(--faq-pad) * -1);top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0;background:var(--p500);opacity:0;transition:opacity .2s ease}
.acc-item.is-open::before{opacity:1}
.acc-q{width:100%;min-height:56px;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;padding:19px 0;background:none;border:0;text-align:left;font-size:17px;font-weight:600;line-height:1.55;color:var(--t1);cursor:pointer;transition:color .18s ease}
.acc-q:hover{color:var(--p700)}
.acc-item.is-open .acc-q{color:var(--p700)}
.acc-icon{position:relative;flex:0 0 22px;width:22px;height:22px;margin-top:3px}
.acc-icon::before,.acc-icon::after{content:"";position:absolute;background:var(--p500);border-radius:2px;transition:transform .24s ease,opacity .24s ease}
.acc-icon::before{left:3px;top:10px;width:16px;height:2px}
.acc-icon::after{left:10px;top:3px;width:2px;height:16px}
.acc-item.is-open .acc-icon::after{transform:rotate(90deg);opacity:0}
.acc-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.acc-a-inner{padding:0 34px 20px 0;color:var(--t2);font-size:16px;line-height:1.8}
@media (max-width:639px){.acc-q{font-size:16px}.acc-a-inner{padding-right:8px;font-size:15px}}

/* ---------- side cards ---------- */
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh1)}
.side-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img);margin-bottom:16px}
.side-card h3{font-size:18px;margin-bottom:8px}
.side-card p{font-size:14px;color:var(--t2);line-height:1.7;margin-bottom:14px}
.side-list li{position:relative;padding-left:16px;font-size:14px;color:var(--t2);line-height:1.65;margin-bottom:9px}
.side-list li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--a500)}
.side-card .btn{margin-top:6px}
.side-card--toc{background:var(--p100);border-color:#CFE2EA;box-shadow:none}
.side-card--toc h3{font-size:16px;color:var(--p900)}
.side-toc a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;border-radius:10px;font-size:15px;font-weight:600;color:var(--p700)}
.side-toc a span.idx{font-size:12px;font-weight:700;color:var(--p500);letter-spacing:.06em}
.side-toc a:hover{background:#fff;color:var(--a600)}

/* ---------- prep ---------- */
.prep{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.prep-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.prep-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.prep-grid{grid-template-columns:repeat(3,1fr)}}
.prep-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease}
.prep-card:hover{transform:translateY(-2px);box-shadow:var(--sh2);background:#fff}
.prep-card .idx{display:block;font-size:13px;font-weight:700;color:var(--a500);letter-spacing:.1em;margin-bottom:10px}
.prep-card h3{font-size:18px;margin-bottom:8px}
.prep-card p{font-size:15px;color:var(--t2);line-height:1.7}

/* ---------- support form ---------- */
.support{background:linear-gradient(180deg,#F5F8FA,#EDF4F7)}
.support-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:start}
@media (min-width:1024px){.support-grid{grid-template-columns:minmax(0,1fr) 440px;gap:56px}}
.support-info h2{font-size:clamp(22px,3.4vw,30px);margin-bottom:14px}
.support-info p{color:var(--t2);margin-bottom:18px;max-width:560px}
.info-strip{display:grid;gap:12px;max-width:560px}
.info-strip li{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:15px;color:var(--t2)}
.info-strip svg{flex:0 0 20px;width:20px;height:20px;margin-top:3px;stroke:var(--p500);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--sh2)}
.form-card h3{font-size:20px;margin-bottom:6px}
.form-card .form-hint{font-size:14px;color:var(--t3);margin-bottom:18px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--t2);margin-bottom:6px}
.field input,.field textarea{width:100%;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;padding:0 14px;outline:none;transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease}
.field textarea{height:auto;min-height:118px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field textarea:focus{border-color:var(--p500);box-shadow:0 0 0 3px rgba(28,126,156,.14);background:#FBFDFE}
.field.is-invalid input,.field.is-invalid textarea{border-color:var(--a600);background:var(--a100)}
.field .err{display:none;font-size:13px;color:var(--a600);margin-top:6px}
.field.is-invalid .err{display:block}
.agree{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--t2);line-height:1.6;margin-bottom:18px}
.agree input{width:18px;height:18px;margin-top:3px;accent-color:var(--p500);flex:0 0 18px}
.form-msg{display:none;margin-top:14px;font-size:14px;line-height:1.65;border-radius:10px}
.form-msg.is-error{display:block;color:var(--a600);background:var(--a100);padding:12px 14px}
.form-msg.is-ok{display:block;color:var(--p900);background:var(--p100);padding:12px 14px}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--p900);color:#fff;padding:52px 0}
.cta-band::after{content:"";position:absolute;right:-100px;top:-120px;width:360px;height:360px;border:1px solid rgba(255,255,255,.14);border-radius:50%;pointer-events:none}
.cta-inner{position:relative;display:flex;flex-direction:column;gap:22px;align-items:flex-start}
@media (min-width:1024px){.cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:40px}}
.cta-inner h2{color:#fff;font-size:clamp(22px,3.4vw,30px);margin-bottom:8px}
.cta-inner p{color:#BFD6DF;max-width:620px}

/* ---------- cross links ---------- */
.cross-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:640px){.cross-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.cross-grid{grid-template-columns:repeat(4,1fr)}}
.cross-card{position:relative;display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh1);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.cross-card:hover{transform:translateY(-2px);box-shadow:var(--sh2);border-color:#CFE2EA}
.cross-card:active{transform:translateY(0)}
.cross-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cross-card .cc-body{padding:16px}
.cross-card h3{font-size:17px;margin-bottom:6px;color:var(--t1)}
.cross-card p{font-size:14px;color:var(--t3);line-height:1.65}
.cross-card.is-current{border-color:var(--p500);box-shadow:0 0 0 3px rgba(28,126,156,.12),var(--sh1)}
.cc-flag{position:absolute;top:12px;right:12px;background:var(--a500);color:#fff;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px}

/* ---------- footer ---------- */
.site-footer{background:var(--p900);color:#C7DAE2;padding:52px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.8fr 1fr 1fr 1.4fr;gap:40px}}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:14px}
.f-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:14px}
.f-brand .brand-mark{width:28px;height:28px;flex:0 0 28px;background:linear-gradient(135deg,#1C7E9C,#12A47A)}
.f-brand .brand-mark::after{left:6px;top:8px;width:15px;height:11px;border-color:rgba(255,255,255,.95)}
.site-footer p{font-size:14px;line-height:1.75;color:#A9C4CE;max-width:340px}
.f-links li{margin-bottom:10px}
.f-links a{color:#C7DAE2;font-size:14px}
.f-links a:hover{color:#fff}
.f-contact li{font-size:14px;line-height:1.65;margin-bottom:12px;color:#A9C4CE}
.f-contact strong{display:block;color:#fff;font-weight:600}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding:18px 0;display:flex;flex-wrap:wrap;gap:6px 24px;justify-content:space-between;font-size:13px;color:#9FBAC5}
@media (max-width:1023px){.footer-bottom{padding-bottom:24px}}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}