/* roulang page: index */
:root{
  --brand:#2A4FD7;
  --brand-soft:#EAF0FF;
  --brand-deep:#1E3CAE;
  --teal:#0FA3B1;
  --orange:#F26A2E;
  --orange-deep:#D9551B;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4EAF3;
  --line-weak:#D8E1EF;
  --ink:#16233A;
  --ink-2:#4A5A73;
  --ink-3:#8895A8;
  --white:#FFFFFF;
  --r-s:8px;
  --r-m:12px;
  --r-l:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(22,35,58,.06);
  --sh-2:0 6px 20px rgba(22,35,58,.08);
  --sh-3:0 16px 40px rgba(22,35,58,.10);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}
*{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(--ink);
  background:var(--bg);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}
.section{padding:52px 0}
@media (min-width:1024px){.section{padding:84px 0}}
.section--tight{padding:40px 0}
@media (min-width:1024px){.section--tight{padding:64px 0}}
.section--line{border-top:1px solid var(--line)}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.sec-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3}
.sec-head .sec-sub{margin:8px 0 0;color:var(--ink-2);font-size:15px;max-width:640px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-soft);border-radius:var(--r-pill);padding:4px 12px;margin-bottom:14px}
.lead{font-size:17px;line-height:1.75;color:var(--ink-2);max-width:640px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-pill);font-size:15px;font-weight:600;line-height:1;padding:0 24px;height:46px;border:1px solid transparent;cursor:pointer;transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease;white-space:nowrap}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 6px 16px rgba(242,106,46,.24)}
.btn-primary:hover{background:var(--orange-deep);color:#fff;transform:translateY(-1px)}
.btn-outline{background:transparent;color:var(--brand);border-color:var(--brand)}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-deep)}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{background:var(--brand-deep);color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.textlink{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.textlink .arw{transition:transform .18s ease}
.textlink:hover .arw{transform:translateX(3px)}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;padding:3px 10px;border-radius:var(--r-pill);background:rgba(15,163,177,.12);color:#0B7C87}
.badge--neutral{background:#F0F3F9;color:var(--ink-2)}
.badge--brand{background:var(--brand-soft);color:var(--brand)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:var(--sh-1)}
.nav-inner{display:flex;align-items:center;height:68px;gap:32px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.logo:hover{color:var(--ink)}
.logo-mark{width:20px;height:20px;border-radius:6px;background:linear-gradient(135deg,var(--brand) 0%,#5B79EE 100%);position:relative;flex:0 0 auto}
.logo-mark::after{content:"";position:absolute;inset:5px;border:2px solid #fff;border-radius:3px;border-right-color:transparent;border-bottom-color:transparent;transform:rotate(45deg)}
.nav-links{display:none;align-items:center;gap:26px;margin:0 auto}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-links a{position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;font-weight:500}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-10px;height:2px;background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .18s ease}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--brand);font-weight:600}
.nav-links a.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-search{display:none;position:relative}
@media (min-width:1200px){.nav-search{display:block}}
.nav-search input{width:220px;height:38px;border:0;border-radius:var(--r-pill);background:#F0F3F9;padding:0 16px 0 38px;font-size:14px;color:var(--ink);outline:none;transition:background .18s ease,box-shadow .18s ease}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{background:#fff;box-shadow:0 0 0 1px var(--brand),0 0 0 4px rgba(42,79,215,.10)}
.nav-search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:16px;height:16px;stroke:var(--ink-3);fill:none;stroke-width:1.8}
.nav-login{display:none;align-items:center;justify-content:center;height:38px;padding:0 18px;border:1px solid var(--brand);border-radius:var(--r-pill);color:var(--brand);font-size:14px;font-weight:600;background:#fff}
.nav-login:hover{background:var(--brand-soft);color:var(--brand-deep)}
@media (min-width:768px){.nav-login{display:inline-flex}}
.nav-cta{height:40px;padding:0 18px;display:inline-flex;align-items:center;border-radius:var(--r-pill);background:var(--orange);color:#fff;font-size:14px;font-weight:700;transition:background .18s ease,transform .18s ease}
.nav-cta:hover{background:var(--orange-deep);color:#fff;transform:translateY(-1px)}
.nav-cta--mobile{display:none}
.hamburger{display:inline-flex;flex-direction:column;justify-content:center;gap:6px;width:48px;height:48px;padding:0 12px;border:1px solid var(--line);border-radius:var(--r-m);background:#fff;cursor:pointer}
.hamburger span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
@media (min-width:1024px){.hamburger{display:none}}
.drawer{position:fixed;top:0;right:0;bottom:0;width:86vw;max-width:360px;background:#fff;box-shadow:var(--sh-3);transform:translateX(102%);transition:transform .26s ease;z-index:80;display:flex;flex-direction:column;padding:20px}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;border-radius:var(--r-s);border:1px solid var(--line);background:#fff;font-size:22px;line-height:1;color:var(--ink-2);cursor:pointer}
.drawer nav{margin-top:8px;flex:1;overflow-y:auto}
.drawer nav a{display:flex;align-items:center;justify-content:space-between;font-size:18px;line-height:56px;height:56px;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer nav a.is-active{color:var(--brand);font-weight:600}
.drawer .drawer-foot{padding-top:16px;border-top:1px solid var(--line)}
.drawer .drawer-foot .btn{width:100%}
.backdrop{position:fixed;inset:0;background:rgba(22,35,58,.42);opacity:0;visibility:hidden;transition:opacity .26s ease;z-index:70}
.backdrop.is-open{opacity:1;visibility:visible}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F5F7FB 0%,#FFFFFF 100%);border-bottom:1px solid var(--line);padding:48px 0 56px}
@media (min-width:1024px){.hero{padding:72px 0 88px}}
.hero::after{content:"";position:absolute;top:-60px;right:-40px;width:340px;height:340px;background-image:radial-gradient(rgba(42,79,215,.16) 1px,transparent 1px);background-size:16px 16px;opacity:.55;pointer-events:none}
.hero-grid{position:relative;z-index:1}
.hero h1{font-size:clamp(30px,4.2vw,46px);line-height:1.25;margin-bottom:18px}
.hero-lead{font-size:17px;line-height:1.75;color:var(--ink-2);max-width:560px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px 22px}
.hero-trust span{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--ink-2)}
.hero-trust svg{width:16px;height:16px;flex:0 0 auto;stroke:var(--brand);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.hero-media{position:relative;margin-top:34px}
@media (min-width:1024px){.hero-media{margin-top:0}}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-l);box-shadow:var(--sh-2);background:#EDF1F8}
.hero-float{display:flex;gap:12px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r-m);box-shadow:var(--sh-3);padding:10px;margin-top:-28px;margin-left:16px;margin-right:16px;position:relative;z-index:2}
@media (min-width:768px){.hero-float{position:absolute;right:-10px;bottom:-22px;width:230px;margin:0}}
.hero-float img{width:54px;height:54px;flex:0 0 auto;border-radius:10px;object-fit:cover;aspect-ratio:1/1;box-shadow:none}
.hero-float p{margin:0;font-size:13px;line-height:1.55;color:var(--ink-2)}
.hero-float strong{display:block;font-size:13.5px;color:var(--ink);font-weight:600;margin-bottom:2px}

/* ---------- service ---------- */
.svc-title{position:relative}
@media (min-width:1024px){.svc-title{position:sticky;top:96px}}
.svc-title h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;margin-bottom:14px}
.svc-title p{color:var(--ink-2);font-size:15px;margin-bottom:18px}
.svc-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);padding:24px;height:100%;display:flex;flex-direction:column;transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;margin-bottom:24px}
.svc-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--line-weak)}
.svc-icon{width:44px;height:44px;border-radius:var(--r-m);background:var(--brand-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.svc-icon svg{width:24px;height:24px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.svc-card h3{font-size:17px;line-height:1.45;margin-bottom:8px}
.svc-card p{font-size:14px;line-height:1.7;color:var(--ink-2);margin-bottom:16px}
.svc-card .textlink{margin-top:auto}

/* ---------- stats ---------- */
.stats{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{padding:22px 0;text-align:left}
@media (min-width:768px){.stat{padding:8px 26px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0;padding-left:0}}
.stat .num{font-size:clamp(32px,3.4vw,40px);font-weight:700;color:var(--brand);line-height:1.15;font-variant-numeric:tabular-nums}
.stat .name{font-size:14px;font-weight:600;color:var(--ink);margin-top:6px}
.stat .note{font-size:12.5px;color:var(--ink-3);margin-top:4px;line-height:1.55}

/* ---------- scene cards ---------- */
.scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow .18s ease,transform .18s ease;height:100%;display:flex;flex-direction:column;margin-bottom:24px}
.scene-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.scene-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EDF1F8}
.scene-body{padding:20px;display:flex;flex-direction:column;flex:1}
.scene-body h3{font-size:19px;line-height:1.45;margin:10px 0 8px}
.scene-body p{font-size:14.5px;color:var(--ink-2);margin-bottom:16px}
.scene-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3)}

/* ---------- plans ---------- */
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);padding:26px;height:100%;display:flex;flex-direction:column;position:relative;transition:box-shadow .18s ease,transform .18s ease;margin-bottom:24px}
.plan:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.plan h3{font-size:20px;margin-bottom:6px}
.plan .plan-sub{font-size:14px;color:var(--ink-2);margin-bottom:18px}
.plan ul{margin-bottom:22px}
.plan li{display:flex;gap:9px;align-items:flex-start;font-size:14.5px;color:var(--ink-2);line-height:1.65;padding:5px 0}
.plan li svg{width:14px;height:14px;flex:0 0 auto;margin-top:5px;stroke:var(--brand);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.plan .btn{margin-top:auto;width:100%}
.plan--rec{border:1px solid var(--brand);box-shadow:var(--sh-3)}
@media (min-width:1024px){.plan--rec{transform:translateY(-8px)}.plan--rec:hover{transform:translateY(-10px)}}
.plan-tag{position:absolute;top:-12px;left:26px;background:var(--brand);color:#fff;font-size:12px;font-weight:600;padding:3px 12px;border-radius:var(--r-pill)}

/* ---------- news ---------- */
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);overflow:hidden;height:100%;display:flex;flex-direction:column;transition:box-shadow .18s ease,transform .18s ease;margin-bottom:24px}
.news-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.news-card .thumb{display:block;overflow:hidden}
.news-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;background:#EDF1F8;transition:transform .3s ease}
.news-card:hover .thumb img{transform:scale(1.03)}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:17px;line-height:1.5;margin:10px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body h3 a{color:var(--ink)}
.news-body h3 a:hover{color:var(--brand)}
.news-body p{font-size:14px;color:var(--ink-2);margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink-3)}
.empty-state{border:1px dashed var(--line-weak);border-radius:var(--r-l);padding:48px 24px;text-align:center;background:#fff}
.empty-state p{font-size:14px;color:var(--ink-2);margin-bottom:12px}

/* ---------- faq ---------- */
.faq-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);padding:6px 22px}
.faq-wrap .accordion{margin:0;background:transparent;border:0}
.faq-wrap .accordion-item{border:0;border-bottom:1px solid var(--line)}
.faq-wrap .accordion-item:last-child{border-bottom:0}
.faq-wrap .accordion-title{border:0;background:transparent;font-size:16px;font-weight:600;color:var(--ink);padding:16px 44px 16px 0;line-height:1.55;min-height:56px;display:flex;align-items:center;position:relative}
.faq-wrap .accordion-title:hover{background:transparent;color:var(--brand)}
.faq-wrap .accordion-title::before{content:"";position:absolute;right:12px;top:50%;width:12px;height:12px;margin:0;transform:translateY(-50%);background:none;border:0;
  background-image:linear-gradient(var(--brand),var(--brand)),linear-gradient(var(--brand),var(--brand));
  background-size:12px 2px,2px 12px;background-position:center,center;background-repeat:no-repeat;transition:transform .2s ease}
.faq-wrap .accordion-title[aria-expanded="true"]::before{transform:translateY(-50%) rotate(45deg)}
.faq-wrap .accordion-content{padding:0 44px 16px 0;background:transparent;border:0;color:var(--ink-2);font-size:15px;line-height:1.8}
.faq-wrap .accordion-content p:last-child{margin-bottom:0}

/* ---------- contact ---------- */
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--sh-1);padding:26px}
@media (min-width:1024px){.contact-form{padding:32px}}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;height:48px;border:1px solid var(--line-weak);border-radius:var(--r-m);background:#fff;padding:0 14px;font-size:15px;color:var(--ink);font-family:inherit;outline:none;transition:border-color .18s ease,box-shadow .18s ease;appearance:none}
.field textarea{height:auto;min-height:120px;padding:12px 14px;line-height:1.7;resize:vertical}
.field select{background-image:linear-gradient(45deg,transparent 50%,var(--ink-3) 50%),linear-gradient(135deg,var(--ink-3) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(42,79,215,.10)}
.form-note{font-size:12px;color:var(--ink-3);margin:12px 0 0}
.form-msg{display:none;margin-top:14px;font-size:14px;font-weight:600;color:#0B7C87;background:rgba(15,163,177,.10);border-radius:var(--r-m);padding:12px 16px}
.form-msg.is-visible{display:block}
.info-panel{background:var(--brand-soft);border-radius:var(--r-l);padding:32px;height:100%}
.info-panel h3{font-size:20px;margin-bottom:10px}
.info-panel p{font-size:14.5px;color:var(--ink-2);margin-bottom:20px}
.info-list li{display:flex;gap:10px;padding:12px 0;border-top:1px solid rgba(42,79,215,.14);font-size:14.5px;color:var(--ink)}
.info-list li:first-child{border-top:0}
.info-list svg{width:18px;height:18px;flex:0 0 auto;margin-top:3px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ---------- footer ---------- */
.site-footer{background:#16233A;color:#B9C4D6;padding:56px 0 0;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}}
.site-footer .logo{color:#fff;font-size:17px}
.site-footer .logo:hover{color:#fff}
.footer-desc{font-size:14px;line-height:1.75;color:#B9C4D6;margin:16px 0 0;max-width:320px}
.footer-col h4{font-size:14px;color:#fff;font-weight:600;margin-bottom:14px;letter-spacing:.02em}
.footer-col a{display:block;font-size:14px;color:#B9C4D6;line-height:2;transition:color .18s ease}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-bottom{margin-top:40px;border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:13px;color:#8895A8;display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between}

/* ---------- responsive tweaks ---------- */
@media (max-width:639px){
  .hero-actions .btn{width:100%}
  .hero-trust{gap:8px 16px}
  .hero-trust span{width:calc(50% - 8px)}
  .svc-card:hover,.scene-card:hover,.news-card:hover,.plan:hover{transform:none}
  .plan--rec{transform:none}
  .faq-wrap{padding:2px 16px}
  .faq-wrap .accordion-content{padding-right:24px}
  .info-panel{padding:24px}
  .contact-form{padding:20px}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: article */
:root{
  --primary:#2A4FD7;
  --primary-light:#EAF0FF;
  --primary-dark:#1E3CAE;
  --teal:#0FA3B1;
  --orange:#F26A2E;
  --orange-dark:#D9551B;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4EAF3;
  --border:#D8E1EF;
  --ink:#16233A;
  --ink-2:#4A5A73;
  --ink-3:#8895A8;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(22,35,58,.06);
  --sh2:0 6px 20px rgba(22,35,58,.08);
  --sh3:0 16px 40px rgba(22,35,58,.10);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--primary-dark)}
button{font-family:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){.container{padding:0 32px}}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s ease}
.site-header.is-scrolled{box-shadow:var(--sh1)}
.header-inner{display:flex;align-items:center;gap:32px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink);white-space:nowrap}
.logo:hover{color:var(--ink)}
.logo-mark{position:relative;width:20px;height:20px;border-radius:6px;background:linear-gradient(135deg,var(--primary),var(--teal));flex:none}
.logo-mark::after{content:"";position:absolute;inset:5px;border-radius:3px;background:#fff;opacity:.92}
.nav-links{display:flex;align-items:center;gap:26px;flex:1}
.nav-links a{position:relative;padding:6px 0;font-size:15px;color:var(--ink-2);transition:color .18s ease}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-18px;height:2px;background:var(--primary);transform:scaleX(0);transition:transform .18s ease}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--primary);font-weight:600}
.nav-links a.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-search{position:relative;display:flex;align-items:center;width:220px;height:38px;padding:0 14px;border:1px solid transparent;border-radius:var(--r-pill);background:#F0F3F9;transition:background .18s ease,border-color .18s ease,box-shadow .18s ease}
.nav-search:focus-within{background:#fff;border-color:var(--primary);box-shadow:0 0 0 3px rgba(42,79,215,.10)}
.nav-search svg{flex:none;width:16px;height:16px;stroke:var(--ink-3);fill:none;stroke-width:1.8}
.nav-search input{width:100%;border:0;background:transparent;outline:none;padding-left:8px;font-size:14px;color:var(--ink)}
.nav-search input::placeholder{color:var(--ink-3)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 26px;border:1px solid transparent;border-radius:var(--r-pill);font-size:15px;font-weight:600;line-height:1;cursor:pointer;transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease}
.btn:active{transform:translateY(1px)}
.btn-accent{background:var(--orange);color:#fff}
.btn-accent:hover{background:var(--orange-dark);color:#fff;transform:translateY(-1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-outline{border-color:var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary-light);color:var(--primary-dark)}
.btn-ghost{border-color:var(--border);color:var(--primary);background:#fff}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-light);color:var(--primary-dark)}
.btn-sm{height:38px;padding:0 20px;font-size:14px}
.nav-toggle{display:none;width:48px;height:48px;border:1px solid var(--line);border-radius:var(--r-md);background:#fff;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px}
.drawer{position:fixed;top:0;right:0;bottom:0;z-index:90;display:flex;flex-direction:column;width:86vw;max-width:360px;padding:20px;background:#fff;box-shadow:var(--sh3);transform:translateX(105%);transition:transform .28s ease}
.drawer.is-open{transform:translateX(0)}
.drawer-mask{position:fixed;inset:0;z-index:80;background:rgba(22,35,58,.45);opacity:0;pointer-events:none;transition:opacity .28s ease}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}
.drawer-close{width:40px;height:40px;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;font-size:18px;color:var(--ink-2);cursor:pointer}
.drawer-nav{display:flex;flex-direction:column;flex:1;margin-top:8px}
.drawer-nav a{font-size:17px;line-height:56px;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer-nav a.is-active{color:var(--primary);font-weight:600}
.drawer-foot{padding-top:16px}
.drawer-foot .btn{width:100%}

/* ---------- Article head ---------- */
.article-hero{padding:32px 0 0;background:linear-gradient(180deg,#F5F7FB 0%,#FFFFFF 100%)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 22px;list-style:none;font-size:13px;color:var(--ink-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--border)}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:var(--primary);font-weight:500}
.badge{display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;padding:3px 12px;border-radius:var(--r-pill);line-height:1.6}
.badge-teal{color:var(--teal);background:rgba(15,163,177,.12)}
.article-title{max-width:900px;margin:16px 0 18px;font-size:clamp(26px,3.4vw,36px);line-height:1.35;font-weight:700;letter-spacing:-.01em;color:var(--ink);word-break:break-word}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:14px;color:var(--ink-3)}
.article-meta span{display:inline-flex;align-items:center}
.article-meta span+span{position:relative;padding-left:14px}
.article-meta span+span::before{content:"";position:absolute;left:0;top:50%;width:1px;height:12px;transform:translateY(-50%);background:var(--border)}
.article-cover{margin-top:28px;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh2);aspect-ratio:16/9;background:#E9EEF8}
.article-cover img{width:100%;height:100%;object-fit:cover}

/* ---------- Article layout ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:start;padding:48px 0 72px}
.article-main{min-width:0}
.content-prose{max-width:780px;font-size:17px;line-height:1.85;color:var(--ink)}
.content-prose p{margin:0 0 1.25em}
.content-prose h2{position:relative;margin:40px 0 16px;padding-left:12px;font-size:clamp(22px,2.4vw,28px);line-height:1.4;font-weight:700;color:var(--ink)}
.content-prose h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--primary)}
.content-prose h3{margin:28px 0 12px;font-size:20px;font-weight:600;color:var(--ink)}
.content-prose h4{margin:22px 0 10px;font-size:17px;font-weight:600;color:var(--ink)}
.content-prose a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.content-prose ul,.content-prose ol{margin:0 0 1.25em;padding-left:0;list-style:none}
.content-prose ul li,.content-prose ol li{position:relative;margin-bottom:8px;padding-left:20px;line-height:1.8}
.content-prose ul li::before{content:"";position:absolute;left:2px;top:.76em;width:6px;height:6px;border-radius:50%;background:var(--primary)}
.content-prose ol{counter-reset:prose}
.content-prose ol li{counter-increment:prose}
.content-prose ol li::before{content:counter(prose) ".";position:absolute;left:0;top:0;color:var(--primary);font-weight:600}
.content-prose blockquote{margin:24px 0;padding:16px 20px;border-left:3px solid var(--primary);border-radius:var(--r-sm);background:#F3F6FF;color:var(--ink-2)}
.content-prose blockquote p:last-child{margin-bottom:0}
.content-prose img{margin:24px auto;border-radius:var(--r-md);max-width:100%;height:auto}
.content-prose figure{margin:24px 0}
.content-prose figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--ink-3)}
.content-prose table{width:100%;margin:24px 0;border-collapse:collapse;font-size:15px}
.content-prose th,.content-prose td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.content-prose thead th{background:#F7F9FC;font-weight:600}
.content-prose tbody tr:nth-child(even){background:#FAFCFF}
.content-prose pre{margin:20px 0;padding:16px;border-radius:var(--r-sm);background:#F7F9FC;overflow:auto;font-size:14px;line-height:1.7}
.content-prose code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:.92em}
.content-prose hr{margin:32px 0;border:0;border-top:1px solid var(--line)}
.empty-state{padding:48px 24px;border:1px dashed var(--border);border-radius:var(--r-lg);background:#fff;text-align:center;color:var(--ink-2);font-size:15px}
.empty-state strong{display:block;margin-bottom:8px;font-size:18px;color:var(--ink)}
.empty-state a{display:inline-block;margin-top:14px;font-weight:600}

/* ---------- Sidebar ---------- */
.article-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px}
.side-card{padding:20px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh1)}
.side-card h3{margin:0 0 12px;font-size:15px;font-weight:700;color:var(--ink)}
.side-list{list-style:none}
.side-list li+li{border-top:1px solid var(--line)}
.side-list a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 0;font-size:14px;line-height:1.5;color:var(--ink-2)}
.side-list a:hover{color:var(--primary)}
.side-list a::after{content:"›";color:var(--ink-3);font-size:16px;line-height:1}
.side-info{margin:0;font-size:14px;line-height:1.8;color:var(--ink-2)}
.side-info dt{font-size:12.5px;color:var(--ink-3);margin-top:10px}
.side-info dt:first-child{margin-top:0}
.side-info dd{margin:2px 0 0;color:var(--ink);font-weight:500}
.side-tips{list-style:none}
.side-tips li{position:relative;padding-left:18px;margin-bottom:10px;font-size:14px;line-height:1.7;color:var(--ink-2)}
.side-tips li:last-child{margin-bottom:0}
.side-tips li::before{content:"";position:absolute;left:0;top:.7em;width:6px;height:6px;border-radius:2px;background:var(--teal)}

/* ---------- Article foot ---------- */
.article-foot{max-width:780px;margin-top:40px;padding-top:32px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.tag{display:inline-flex;align-items:center;padding:5px 14px;border-radius:var(--r-pill);background:var(--primary-light);color:var(--primary);font-size:12.5px;font-weight:500}
.tag:hover{background:#DDE7FF;color:var(--primary-dark)}
.action-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-bottom:32px}
.text-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--primary)}
.text-link::after{content:"→";transition:transform .18s ease}
.text-link:hover::after{transform:translateX(2px)}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:40px}
.post-nav a{display:block;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}
.post-nav a:hover{border-color:var(--primary);box-shadow:var(--sh1);transform:translateY(-2px)}
.post-nav .label{display:block;margin-bottom:6px;font-size:12.5px;color:var(--ink-3)}
.post-nav .title{font-size:15px;font-weight:600;color:var(--ink);line-height:1.5}
.related-title{display:flex;align-items:center;gap:10px;margin:0 0 18px;font-size:20px;font-weight:700;color:var(--ink)}
.related-title::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--primary)}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rel-card{display:flex;flex-direction:column;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh1);transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease}
.rel-card:hover{box-shadow:var(--sh2);transform:translateY(-2px);border-color:var(--border)}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:#E9EEF8}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body{padding:16px 18px 20px}
.rel-body h4{margin:0 0 8px;font-size:15.5px;font-weight:600;line-height:1.55;color:var(--ink)}
.rel-body p{margin:0;font-size:13.5px;line-height:1.7;color:var(--ink-2)}

/* ---------- CTA strip ---------- */
.cta-strip{margin:0 0 72px;padding:32px 40px;border-radius:var(--r-lg);background:var(--primary-light);display:flex;align-items:center;justify-content:space-between;gap:24px}
.cta-strip h2{margin:0 0 8px;font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--ink)}
.cta-strip p{margin:0;font-size:15px;color:var(--ink-2);max-width:640px}
.cta-strip .btn{flex:none}

/* ---------- Footer ---------- */
.site-footer{margin-top:0;padding:56px 0 24px;background:#16233A;color:#B9C4D6}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.site-footer .logo{color:#fff;font-size:17px}
.site-footer .logo:hover{color:#fff}
.footer-desc{margin:14px 0 0;max-width:330px;font-size:14px;line-height:1.8;color:#B9C4D6}
.footer-col h4{margin:0 0 14px;font-size:14px;font-weight:600;color:#fff}
.footer-col a{display:block;padding:6px 0;font-size:14px;color:#B9C4D6}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#8895A8}

/* ---------- Responsive ---------- */
@media (max-width:1100px){
  .nav-search{width:180px}
  .nav-links{gap:20px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-search{display:none}
  .nav-toggle{display:flex}
  .header-inner{gap:16px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:32px;padding:40px 0 56px}
  .article-side{position:static;top:auto}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-strip{margin-bottom:56px;padding:28px 24px}
}
@media (max-width:767px){
  .article-hero{padding:24px 0 0}
  .article-title{font-size:24px;margin:14px 0 14px}
  .article-meta{font-size:13px;gap:10px}
  .article-meta span+span{padding-left:10px}
  .content-prose{font-size:16px;line-height:1.8}
  .post-nav{grid-template-columns:1fr}
  .cta-strip{flex-direction:column;align-items:flex-start;gap:18px}
  .cta-strip .btn{width:100%}
  .related-grid{grid-template-columns:1fr}
  .action-row{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .header-actions .btn-accent{display:none}
  .article-cover{margin-top:20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .cta-strip{padding:24px 20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root{
  --brand:#2A4FD7;
  --brand-light:#EAF0FF;
  --brand-deep:#1E3CAE;
  --brand-soft:rgba(42,79,215,.08);
  --teal:#0FA3B1;
  --teal-soft:rgba(15,163,177,.12);
  --orange:#F26A2E;
  --orange-deep:#D9551B;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4EAF3;
  --line-weak:#D8E1EF;
  --ink:#16233A;
  --text-2:#4A5A73;
  --text-3:#8895A8;
  --white:#FFFFFF;
  --r-8:8px;
  --r-12:12px;
  --r-16:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(22,35,58,.06);
  --sh-2:0 6px 20px rgba(22,35,58,.08);
  --sh-3:0 16px 40px rgba(22,35,58,.10);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
@media (min-width:1024px){
  .container{padding-left:32px;padding-right:32px;}
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  gap:16px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.logo:hover{color:var(--ink);}
.logo-mark{
  width:20px;height:20px;
  border-radius:6px;
  background:var(--brand);
  position:relative;
  flex:none;
  display:inline-block;
}
.logo-mark::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:2px;
  background:var(--white);
}
.nav-links{
  display:none;
  align-items:center;
  gap:26px;
  margin-left:16px;
}
.nav-links a{
  position:relative;
  font-size:15px;
  color:var(--text-2);
  padding:6px 0;
  line-height:1.4;
}
.nav-links a:hover{color:var(--ink);}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-20px;
  height:2px;
  background:var(--brand);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .18s ease;
}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--brand);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  margin-left:auto;
}
.nav-search{
  display:none;
  position:relative;
  width:220px;
}
.nav-search svg{
  position:absolute;
  left:14px;top:50%;
  transform:translateY(-50%);
  width:16px;height:16px;
  stroke:var(--text-3);
  fill:none;
  stroke-width:2;
}
.nav-search input{
  width:100%;
  height:38px;
  border:none;
  border-radius:var(--r-pill);
  background:#F0F3F9;
  padding:0 16px 0 38px;
  font-size:14px;
  color:var(--ink);
  transition:background .18s ease,box-shadow .18s ease;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search input:focus{
  outline:none;
  background:var(--surface);
  box-shadow:0 0 0 1px var(--brand),0 0 0 4px rgba(42,79,215,.10);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .12s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-accent{
  background:var(--orange);
  color:var(--white);
  font-weight:700;
}
.btn-accent:hover{background:var(--orange-deep);color:var(--white);transform:translateY(-1px);}
.btn-primary{
  background:var(--brand);
  color:var(--white);
}
.btn-primary:hover{background:var(--brand-deep);color:var(--white);}
.btn-outline{
  border-color:var(--brand);
  color:var(--brand);
  background:transparent;
}
.btn-outline:hover{background:var(--brand-light);color:var(--brand-deep);}
.btn-ghost{
  border-color:var(--line-weak);
  color:var(--brand);
  background:transparent;
}
.btn-ghost:hover{background:var(--brand-light);border-color:var(--brand);color:var(--brand-deep);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-lg{height:48px;padding:0 28px;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
}
.link-arrow span.arw{
  display:inline-block;
  transition:transform .18s ease;
}
.link-arrow:hover span.arw{transform:translateX(2px);}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:48px;height:48px;
  border:1px solid var(--line-weak);
  border-radius:var(--r-12);
  background:var(--surface);
  cursor:pointer;
  padding:0;
}
.nav-toggle span{
  display:block;
  position:relative;
  width:20px;height:2px;
  background:var(--ink);
  border-radius:2px;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:20px;height:2px;
  background:var(--ink);
  border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* drawer */
.drawer-backdrop{
  position:fixed;
  inset:0;
  background:rgba(22,35,58,.42);
  opacity:0;
  visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease;
  z-index:80;
}
.drawer-backdrop.is-open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;
  top:0;right:0;
  width:86vw;
  max-width:360px;
  height:100%;
  background:var(--surface);
  box-shadow:var(--sh-3);
  transform:translateX(100%);
  transition:transform .24s ease;
  z-index:81;
  display:flex;
  flex-direction:column;
  padding:20px;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.drawer-close{
  width:36px;height:36px;
  border-radius:50%;
  border:1px solid var(--line-weak);
  background:var(--surface);
  color:var(--text-2);
  font-size:18px;
  line-height:1;
  cursor:pointer;
}
.drawer-links{display:flex;flex-direction:column;padding-top:8px;}
.drawer-links a{
  font-size:18px;
  line-height:56px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.drawer-links a.is-active{color:var(--brand);font-weight:600;}
.drawer-foot{margin-top:auto;padding-top:20px;}
.drawer-foot .btn{width:100%;}

@media (min-width:1024px){
  .nav-links{display:flex;}
  .nav-search{display:block;}
  .nav-toggle{display:none;}
  .header-inner{gap:24px;}
  .logo{font-size:18px;}
}

/* ---------- page head ---------- */
.crumbs{
  padding:20px 0 0;
  font-size:13px;
  color:var(--text-3);
}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px;}
.crumbs li{display:inline-flex;align-items:center;gap:6px;}
.crumbs li:not(:last-child)::after{content:"/";color:var(--line-weak);}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--brand);}
.crumbs li:last-child{color:var(--brand);font-weight:600;}

.page-head{padding:28px 0 32px;}
.page-head-grid{display:grid;grid-template-columns:1fr;gap:28px;align-items:center;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--teal);
  background:var(--teal-soft);
  border-radius:var(--r-pill);
  padding:4px 12px;
  margin-bottom:16px;
}
.page-head h1{
  font-size:clamp(30px,4.2vw,42px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ink);
}
.page-head .lead{
  margin-top:16px;
  max-width:640px;
  font-size:17px;
  line-height:1.75;
  color:var(--text-2);
}
.head-meta{
  display:flex;
  flex-wrap:wrap;
  gap:20px;
  margin-top:22px;
  font-size:14px;
  color:var(--text-3);
}
.head-meta strong{
  display:block;
  font-size:20px;
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  line-height:1.4;
}
.head-figure{
  border-radius:var(--r-16);
  overflow:hidden;
  box-shadow:var(--sh-2);
  border:1px solid var(--line);
  background:#F0F3F9;
  aspect-ratio:16/10;
}
.head-figure img{width:100%;height:100%;object-fit:cover;}
@media (min-width:900px){
  .page-head-grid{grid-template-columns:1.15fr .85fr;gap:40px;}
}

/* ---------- anchor bar ---------- */
.anchor-bar{
  position:sticky;
  top:68px;
  z-index:40;
  background:rgba(245,247,251,.94);
  backdrop-filter:blur(6px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:12px 0;
}
.anchor-scroll{
  display:flex;
  gap:10px;
  overflow-x:auto;
  scrollbar-width:none;
}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-pill{
  flex:none;
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-weak);
  background:var(--surface);
  font-size:14px;
  color:var(--text-2);
  white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.anchor-pill:hover{border-color:var(--brand);color:var(--brand);}
.anchor-pill.is-current{
  background:var(--brand);
  border-color:var(--brand);
  color:var(--white);
  font-weight:600;
}

/* ---------- layout ---------- */
.section{padding:48px 0;}
@media (min-width:1024px){.section{padding:80px 0;}}
.doc-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:1024px){
  .doc-grid{grid-template-columns:minmax(0,8fr) minmax(0,3fr);gap:40px;align-items:start;}
}
.doc-main{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-16);
  box-shadow:var(--sh-1);
  padding:28px 22px;
}
@media (min-width:768px){.doc-main{padding:40px;}}

.doc-section + .doc-section{margin-top:44px;padding-top:36px;border-top:1px solid var(--line);}
.doc-section h2{
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.35;
  font-weight:700;
  padding-left:14px;
  border-left:4px solid var(--brand);
  margin-bottom:14px;
}
.doc-section h3{
  font-size:19px;
  font-weight:600;
  margin:26px 0 10px;
}
.doc-section p{
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
}
.doc-section p + p{margin-top:14px;}
.doc-section ul.dot-list{margin:14px 0;}
.doc-section ul.dot-list li{
  position:relative;
  padding-left:18px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}
.doc-section ul.dot-list li + li{margin-top:8px;}
.doc-section ul.dot-list li::before{
  content:"";
  position:absolute;
  left:2px;top:.72em;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--brand);
}

.figure-inline{
  margin:20px 0 6px;
  border-radius:var(--r-12);
  overflow:hidden;
  border:1px solid var(--line);
  background:#F0F3F9;
  aspect-ratio:16/9;
}
.figure-inline img{width:100%;height:100%;object-fit:cover;}
.figcap{
  font-size:13px;
  color:var(--text-3);
  text-align:center;
  margin-top:8px;
}

/* steps */
.steps{margin-top:8px;display:grid;gap:14px;}
.step{
  display:grid;
  grid-template-columns:28px 1fr;
  gap:14px;
  align-items:start;
}
.step-num{
  width:28px;height:28px;
  border-radius:50%;
  background:var(--brand-soft);
  color:var(--brand);
  font-size:14px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  font-variant-numeric:tabular-nums;
  margin-top:2px;
}
.step-body h4{
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  line-height:1.5;
}
.step-body p{
  margin-top:4px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}

/* callout */
.callout-soft{
  background:var(--brand-light);
  border-left:3px solid var(--brand);
  border-radius:var(--r-12);
  padding:16px 20px;
  margin:20px 0;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}
.callout-soft strong{color:var(--ink);}

/* table */
.tbl-wrap{overflow-x:auto;margin:18px 0 4px;border:1px solid var(--line);border-radius:var(--r-12);}
table.doc-table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
  min-width:520px;
  background:var(--surface);
}
table.doc-table th,
table.doc-table td{
  padding:12px 16px;
  text-align:left;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
  line-height:1.7;
}
table.doc-table thead th{
  background:#F7F9FC;
  color:var(--ink);
  font-weight:600;
  font-size:14px;
}
table.doc-table tbody tr:nth-child(even) td{background:#FBFCFE;}
table.doc-table tbody tr:last-child td{border-bottom:none;}

/* sidebar */
.doc-side{
  display:flex;
  flex-direction:column;
  gap:20px;
}
@media (min-width:1024px){
  .doc-side{position:sticky;top:150px;}
}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-16);
  box-shadow:var(--sh-1);
  padding:20px;
}
.side-card h3{
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  margin-bottom:12px;
}
.toc-list a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:14px;
  color:var(--text-2);
  padding:10px 0;
  border-bottom:1px solid var(--line);
  line-height:1.5;
}
.toc-list li:last-child a{border-bottom:none;}
.toc-list a:hover{color:var(--brand);}
.toc-list a::after{content:"→";font-size:12px;color:var(--text-3);}
.side-note{
  background:var(--brand-light);
  border:1px solid rgba(42,79,215,.16);
  border-radius:var(--r-16);
  padding:20px;
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
}
.side-note strong{display:block;color:var(--ink);font-size:15px;margin-bottom:6px;}
.side-note .btn{width:100%;margin-top:14px;}

/* support cards */
.card-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:768px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
.info-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-16);
  box-shadow:var(--sh-1);
  padding:24px;
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.info-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px);border-color:var(--line-weak);}
.info-card .ico{
  width:44px;height:44px;
  border-radius:var(--r-12);
  background:var(--brand-light);
  display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;
}
.info-card .ico svg{width:24px;height:24px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.info-card h3{font-size:18px;font-weight:600;line-height:1.45;margin-bottom:8px;}
.info-card p{font-size:14px;line-height:1.8;color:var(--text-2);}

/* FAQ */
.faq-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-16);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:56px;
  padding:14px 22px;
  background:transparent;
  border:none;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  cursor:pointer;
  line-height:1.6;
}
.faq-q:hover{color:var(--brand);}
.faq-ico{
  flex:none;
  position:relative;
  width:20px;height:20px;
}
.faq-ico::before,
.faq-ico::after{
  content:"";
  position:absolute;
  background:var(--brand);
  border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.faq-ico::before{left:0;top:9px;width:20px;height:2px;}
.faq-ico::after{left:9px;top:0;width:2px;height:20px;}
.faq-item.is-open .faq-ico::after{transform:rotate(90deg);opacity:0;}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s ease;
}
.faq-a-inner{
  padding:0 22px 18px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  max-width:820px;
}

/* CTA band */
.cta-band{
  background:var(--brand-light);
  border-radius:var(--r-16);
  padding:32px 24px;
  display:flex;
  flex-direction:column;
  gap:20px;
  align-items:flex-start;
}
@media (min-width:768px){
  .cta-band{padding:40px;flex-direction:row;align-items:center;justify-content:space-between;}
}
.cta-band h2{
  font-size:clamp(21px,2.2vw,26px);
  font-weight:700;
  line-height:1.35;
  color:var(--ink);
}
.cta-band p{
  margin-top:8px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  max-width:560px;
}
.back-home{
  margin-top:24px;
  font-size:14px;
  color:var(--text-2);
}
.back-home a{font-weight:600;}

/* footer */
.site-footer{
  background:var(--ink);
  color:#B9C4D6;
  padding:56px 0 24px;
  margin-top:56px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;}
}
.site-footer .logo{color:var(--white);font-size:17px;}
.site-footer .logo:hover{color:var(--white);}
.site-footer .logo-mark{background:var(--brand);}
.footer-desc{
  margin-top:14px;
  font-size:14px;
  line-height:1.8;
  color:#B9C4D6;
  max-width:340px;
}
.footer-col h4{
  font-size:14px;
  font-weight:700;
  color:var(--white);
  margin-bottom:14px;
}
.footer-col a{
  display:block;
  font-size:14px;
  line-height:2;
  color:#B9C4D6;
}
.footer-col a:hover{color:var(--white);text-decoration:underline;}
.footer-bottom{
  margin-top:36px;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  justify-content:space-between;
  font-size:13px;
  color:#8895A8;
}

@media (max-width:639px){
  .btn{width:100%;}
  .header-actions .btn,
  .header-actions .nav-toggle,
  .drawer-foot .btn,
  .side-note .btn{width:auto;}
  .drawer-foot .btn{width:100%;}
  .head-meta strong{font-size:18px;}
}

/* roulang page: category2 */
:root{
  --primary:#2A4FD7;
  --primary-light:#EAF0FF;
  --primary-dark:#1E3CAE;
  --teal:#0FA3B1;
  --teal-soft:rgba(15,163,177,.12);
  --accent:#F26A2E;
  --accent-dark:#D9551B;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4EAF3;
  --line-weak:#D8E1EF;
  --ink:#16233A;
  --ink-2:#4A5A73;
  --ink-3:#8895A8;
  --r-s:8px;
  --r-m:12px;
  --r-l:16px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(22,35,58,.06);
  --sh2:0 6px 20px rgba(22,35,58,.08);
  --sh3:0 16px 40px rgba(22,35,58,.10);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--primary-dark);}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}

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

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-accent{background:var(--accent);color:#fff;border-color:var(--accent);}
.btn-accent:hover{background:var(--accent-dark);border-color:var(--accent-dark);color:#fff;transform:translateY(-1px);}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:var(--primary-light);color:var(--primary-dark);}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.link-arrow .arw{transition:transform .18s ease;display:inline-block;}
.link-arrow:hover .arw{transform:translateX(2px);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh1);}
.header-inner{
  display:flex;align-items:center;gap:32px;
  height:68px;
}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:17px;font-weight:700;color:var(--ink);
  letter-spacing:-.01em;
  flex-shrink:0;
}
.logo:hover{color:var(--ink);}
.logo-mark{
  width:20px;height:20px;border-radius:6px;
  background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);
  position:relative;flex-shrink:0;
}
.logo-mark::after{
  content:"";position:absolute;inset:5px;border:2px solid #fff;border-radius:2px;
}
.nav-links{
  display:flex;align-items:center;gap:28px;
  flex:1;
}
.nav-links a{
  position:relative;
  font-size:15px;color:var(--ink-2);
  padding:24px 0;
  transition:color .18s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;
  background:var(--primary);
  transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
  border-radius:2px;
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--primary);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{
  position:relative;width:220px;flex-shrink:0;
}
.nav-search input{
  width:100%;height:38px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  background:#F0F3F9;
  padding:0 16px 0 38px;
  font-size:14px;color:var(--ink);
  transition:background-color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.nav-search input::placeholder{color:var(--ink-3);}
.nav-search input:focus{
  background:#fff;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(42,79,215,.10);
  outline:none;
}
.nav-search .search-ico{
  position:absolute;left:14px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;pointer-events:none;color:var(--ink-3);
}
.nav-toggle{
  display:none;
  width:48px;height:48px;border:1px solid var(--line);
  border-radius:var(--r-m);background:#fff;
  align-items:center;justify-content:center;
  cursor:pointer;padding:0;
}
.nav-toggle span{
  display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;
  position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink);border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(22,35,58,.42);
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;
  z-index:80;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;
  width:86vw;max-width:360px;
  background:#fff;box-shadow:var(--sh3);
  transform:translateX(100%);
  transition:transform .26s ease;
  z-index:90;
  display:flex;flex-direction:column;
  padding:20px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{
  width:40px;height:40px;border-radius:var(--r-m);border:1px solid var(--line);
  background:#fff;font-size:20px;line-height:1;color:var(--ink-2);cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;padding:8px 0;flex:1;overflow-y:auto;}
.drawer-nav a{
  font-size:18px;line-height:56px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--primary);font-weight:600;}
.drawer-foot{padding-top:16px;}

/* ---------- 面包屑 ---------- */
.crumbs-bar{padding:22px 0 0;}
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--ink-3);
}
.crumbs li{display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:var(--line-weak);}
.crumbs a{color:var(--ink-3);}
.crumbs a:hover{color:var(--primary);}
.crumbs li[aria-current] span,
.crumbs li[aria-current]{color:var(--primary);font-weight:600;}

/* ---------- 页头 ---------- */
.page-head{padding:28px 0 8px;}
.page-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;color:var(--teal);
  background:var(--teal-soft);
  padding:3px 10px;border-radius:var(--r-pill);
  margin-bottom:16px;
}
.page-head h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-.01em;
  max-width:820px;
}
.page-head .lead{
  margin-top:18px;
  max-width:720px;
  font-size:17px;
  line-height:1.75;
  color:var(--ink-2);
}
.head-figure{
  margin-top:32px;
  border-radius:var(--r-l);
  overflow:hidden;
  box-shadow:var(--sh2);
  border:1px solid var(--line);
  background:#EEF1F7;
  aspect-ratio:16/6;
}
.head-figure img{width:100%;height:100%;object-fit:cover;}

/* ---------- 通用板块 ---------- */
.section{padding:64px 0;}
.section-tint{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:640px;margin-bottom:36px;}
.section-head h2{
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.3;font-weight:700;letter-spacing:-.01em;
}
.section-head p{margin-top:12px;font-size:16px;color:var(--ink-2);}

/* ---------- Z 字图文 ---------- */
.zig{display:flex;flex-direction:column;gap:56px;}
.zig-row{
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
  align-items:center;
}
.zig-media{
  border-radius:var(--r-l);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh2);
  background:#EEF1F7;
  aspect-ratio:4/3;
}
.zig-media img{width:100%;height:100%;object-fit:cover;}
.zig-text h2{
  font-size:clamp(22px,2.2vw,28px);
  line-height:1.35;font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:14px;
}
.zig-text p{font-size:16px;line-height:1.85;color:var(--ink-2);}
.check-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.check-list li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:15px;line-height:1.7;color:var(--ink);
}
.check-list .tick{
  flex-shrink:0;width:18px;height:18px;margin-top:3px;color:var(--primary);
}
@media (min-width:900px){
  .zig-row{grid-template-columns:5fr 7fr;gap:48px;}
  .zig-row.rev{grid-template-columns:7fr 5fr;}
  .zig-row.rev .zig-media{order:2;}
  .zig-row.rev .zig-text{order:1;}
}

/* ---------- 核验清单卡 ---------- */
.check-grid{
  display:grid;grid-template-columns:1fr;gap:20px;
}
@media (min-width:680px){.check-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1024px){.check-grid{grid-template-columns:repeat(4,1fr);}}
.check-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  padding:24px;
  box-shadow:var(--sh1);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.check-card:hover{box-shadow:var(--sh2);transform:translateY(-2px);border-color:var(--line-weak);}
.check-card .icon{
  width:24px;height:24px;color:var(--primary);margin-bottom:14px;
}
.check-card h3{font-size:17px;font-weight:600;line-height:1.45;margin-bottom:8px;}
.check-card p{font-size:14px;line-height:1.65;color:var(--ink-2);}

/* ---------- 数据条 ---------- */
.stats{
  display:grid;grid-template-columns:repeat(2,1fr);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  box-shadow:var(--sh1);
  overflow:hidden;
}
@media (min-width:1024px){.stats{grid-template-columns:repeat(4,1fr);}}
.stat{
  padding:28px 24px;
  border-bottom:1px solid var(--line);
  border-right:1px solid var(--line);
}
.stat:nth-child(2n){border-right:none;}
@media (min-width:1024px){
  .stat{border-bottom:none;}
  .stat:nth-child(2n){border-right:1px solid var(--line);}
  .stat:last-child{border-right:none;}
}
.stat .num{
  font-size:36px;font-weight:700;color:var(--primary);
  line-height:1.1;font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.stat .name{margin-top:10px;font-size:14px;font-weight:600;color:var(--ink);}
.stat .meta{margin-top:4px;font-size:12px;color:var(--ink-3);line-height:1.6;}

/* ---------- FAQ ---------- */
.faq-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:12px;margin-bottom:28px;
}
.faq-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.3;}
.faq-head p{font-size:14px;color:var(--ink-3);}
.faq-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  box-shadow:var(--sh1);
  overflow:hidden;
}
.faq-item+.faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 24px;
  min-height:56px;
  background:none;border:0;
  text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
  line-height:1.5;
  cursor:pointer;
  transition:color .18s ease,background-color .18s ease;
}
.faq-q:hover{color:var(--primary);background:#FAFBFE;}
.faq-q .plus{
  flex-shrink:0;width:20px;height:20px;position:relative;
  color:var(--primary);
  transition:transform .2s ease;
}
.faq-q .plus::before,
.faq-q .plus::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
  left:50%;top:50%;transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:14px;height:2px;}
.faq-q .plus::after{width:2px;height:14px;}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .24s ease;
}
.faq-a-inner{
  padding:0 24px 18px;
  font-size:15px;line-height:1.8;color:var(--ink-2);
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--primary-light);
  border-radius:var(--r-l);
  padding:36px 32px;
  display:flex;flex-direction:column;gap:20px;
  border:1px solid #DCE5FB;
}
.cta-band h2{font-size:clamp(21px,2vw,26px);font-weight:700;line-height:1.35;}
.cta-band p{margin-top:10px;font-size:15px;line-height:1.75;color:var(--ink-2);max-width:620px;}
@media (min-width:820px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:40px;}
  .cta-band .cta-actions{flex-shrink:0;}
}

/* ---------- 返回 ---------- */
.back-row{padding:32px 0 8px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:#B9C4D6;
  padding:56px 0 0;
  margin-top:64px;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:36px;
  padding-bottom:40px;
}
@media (min-width:680px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}}
.site-footer .logo{color:#fff;font-size:17px;}
.site-footer .logo:hover{color:#fff;}
.footer-desc{
  margin-top:16px;font-size:14px;line-height:1.75;color:#B9C4D6;max-width:340px;
}
.footer-col h4{
  font-size:14px;font-weight:600;color:#fff;margin-bottom:16px;
}
.footer-col a{
  display:block;
  font-size:14px;line-height:2.1;color:#B9C4D6;
}
.footer-col a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#8895A8;
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links,.nav-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-inner{gap:16px;}
  .section{padding:52px 0;}
  .site-footer{margin-top:52px;}
}
@media (max-width:520px){
  .header-actions .btn-accent{display:none;}
  .page-head h1{font-size:28px;}
  .stat .num{font-size:30px;}
  .cta-band{padding:28px 22px;}
  .faq-q{font-size:15px;padding:0 18px;}
  .faq-a-inner{padding:0 18px 16px;}
  .btn{width:100%;}
  .header-actions .btn{width:auto;}
  .cta-band .btn{width:100%;}
}

/* roulang page: category3 */
:root{
  --brand:#2A4FD7;
  --brand-soft:#EAF0FF;
  --brand-deep:#1E3CAE;
  --teal:#0FA3B1;
  --teal-deep:#0B7E89;
  --accent:#F26A2E;
  --accent-deep:#D9551B;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4EAF3;
  --line-weak:#D8E1EF;
  --ink:#16233A;
  --ink-2:#4A5A73;
  --ink-3:#8895A8;
  --r8:8px;
  --r12:12px;
  --r16:16px;
  --pill:999px;
  --sh1:0 1px 2px rgba(22,35,58,.06);
  --sh2:0 6px 20px rgba(22,35,58,.08);
  --sh3:0 16px 40px rgba(22,35,58,.10);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

h1,h2,h3,h4,p,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
svg{display:block}

h1{font-size:clamp(30px,4.2vw,46px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;font-weight:700;letter-spacing:-.005em}
h3{font-size:20px;line-height:1.45;font-weight:600}

/* ---------- Foundation 覆盖 ---------- */
.grid-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.grid-x{display:flex;flex-flow:row wrap}
.grid-x > .cell{min-width:0}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-margin-x > .cell{padding-left:12px;padding-right:12px}
.grid-x > .cell.small-12{width:100%}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh1)}
.header-inner{
  display:flex;
  align-items:center;
  height:68px;
  gap:32px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.logo:hover{color:var(--ink)}
.logo-mark{
  position:relative;
  width:20px;
  height:20px;
  border-radius:6px;
  background:linear-gradient(135deg,#2A4FD7 0%,#0FA3B1 100%);
  flex:none;
}
.logo-mark::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:2px;
  background:#fff;
  opacity:.92;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:26px;
}
.nav-links a{
  position:relative;
  font-size:15px;
  color:var(--ink-2);
  padding:6px 0;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--brand);font-weight:600}
.nav-links a.is-active::after{transform:scaleX(1)}

.header-tools{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
}
.nav-search{
  position:relative;
  display:flex;
  align-items:center;
}
.nav-search svg{
  position:absolute;
  left:14px;
  width:16px;
  height:16px;
  color:var(--ink-3);
  pointer-events:none;
}
.nav-search input{
  width:220px;
  height:38px;
  margin:0;
  padding:0 16px 0 38px;
  border:1px solid transparent;
  border-radius:var(--pill);
  background:#F0F3F9;
  font-size:14px;
  color:var(--ink);
  transition:background .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{
  outline:none;
  background:#fff;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(42,79,215,.1);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-lg{height:48px;padding:0 28px;font-size:15.5px}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--sh1)}
.btn-accent:hover{background:var(--accent-deep);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep)}
.btn-solid{background:var(--brand);color:#fff}
.btn-solid:hover{background:var(--brand-deep);color:#fff}

.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:48px;
  height:48px;
  padding:0 12px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  height:2px;
  width:100%;
  border-radius:2px;
  background:var(--ink);
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(22,35,58,.42);
  opacity:0;
  visibility:hidden;
  transition:opacity .22s ease,visibility .22s ease;
  z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

.drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  width:86vw;
  max-width:380px;
  background:#fff;
  box-shadow:var(--sh3);
  transform:translateX(102%);
  transition:transform .26s ease;
  z-index:100;
  display:flex;
  flex-direction:column;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:18px 20px;
  border-bottom:1px solid var(--line);
}
.drawer-close{
  width:40px;
  height:40px;
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  color:var(--ink-2);
  font-size:22px;
  line-height:1;
  cursor:pointer;
}
.drawer-close:hover{background:#F3F6FC}
.drawer-nav{flex:1;overflow-y:auto;padding:8px 20px}
.drawer-nav a{
  display:block;
  font-size:18px;
  line-height:56px;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);font-weight:600}
.drawer-nav a:hover{color:var(--brand)}
.drawer-foot{padding:16px 20px 24px;border-top:1px solid var(--line)}
.drawer-foot .btn{width:100%}

/* ---------- 面包屑 ---------- */
.crumbs{
  padding-top:22px;
  font-size:13.5px;
  color:var(--ink-3);
}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.crumbs li{display:flex;align-items:center;gap:6px}
.crumbs li + li::before{content:"/";color:var(--line-weak)}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .current{color:var(--brand);font-weight:600}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:36px 0 64px;
  background:linear-gradient(180deg,#F5F7FB 0%,#FFFFFF 100%);
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  top:0;
  right:0;
  width:420px;
  height:320px;
  background-image:radial-gradient(rgba(42,79,215,.06) 1.5px,transparent 1.5px);
  background-size:18px 18px;
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:48px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--teal-deep);
  background:rgba(15,163,177,.12);
  border-radius:var(--pill);
  padding:4px 12px;
  margin-bottom:18px;
}
.hero h1{margin-bottom:18px}
.hero-lead{
  font-size:17.5px;
  line-height:1.75;
  color:var(--ink-2);
  max-width:620px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.trust-list{display:flex;flex-wrap:wrap;gap:10px 22px}
.trust-list li{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-2);
}
.trust-list svg{flex:none;color:var(--brand)}

.hero-media{position:relative}
.hero-figure{
  position:relative;
  border-radius:var(--r16);
  overflow:hidden;
  box-shadow:var(--sh2);
  background:#E9EDF5;
  aspect-ratio:16/10;
}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.hero-note{
  position:absolute;
  right:16px;
  bottom:-20px;
  width:236px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:12px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r16);
  box-shadow:var(--sh3);
}
.hero-note img{width:56px;height:56px;border-radius:var(--r12);object-fit:cover;flex:none}
.hero-note p{font-size:12.5px;line-height:1.55;color:var(--ink-2)}

/* ---------- 板块通用 ---------- */
.section{padding:52px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:34px}
.section-title{
  position:relative;
  padding-left:16px;
  margin-bottom:12px;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:8px;
  bottom:8px;
  width:4px;
  border-radius:2px;
  background:var(--brand);
}
.section-desc{color:var(--ink-2);max-width:660px;font-size:16px}

/* ---------- 设备矩阵 ---------- */
.device-grid{margin-bottom:-24px}
.device-cell{padding-bottom:24px}
.card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r16);
  box-shadow:var(--sh1);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.device-card{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:24px;
  border-radius:var(--r16);
}
.device-card:hover{
  box-shadow:var(--sh2);
  transform:translateY(-2px);
  border-color:rgba(42,79,215,.42);
}
.device-ico{
  display:grid;
  place-items:center;
  width:56px;
  height:56px;
  border-radius:14px;
  background:var(--brand-soft);
  color:var(--brand);
  margin-bottom:18px;
}
.device-card:hover .device-ico{background:#DDE7FF}
.device-card h3{font-size:18px;margin-bottom:6px}
.device-meta{
  font-size:13px;
  color:var(--teal-deep);
  margin-bottom:12px;
}
.device-text{
  font-size:14px;
  line-height:1.8;
  color:var(--ink-2);
  margin-bottom:18px;
}
.device-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12.5px;
  line-height:1.6;
  padding:3px 10px;
  border-radius:var(--pill);
  white-space:nowrap;
}
.badge-teal{color:var(--teal-deep);background:rgba(15,163,177,.12)}
.badge-muted{color:var(--ink-2);background:#EFF2F8}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
}
.link-arrow .arw{transition:transform .18s ease;font-size:13px}
.link-arrow:hover{color:var(--brand-deep)}
.link-arrow:hover .arw{transform:translateX(3px)}
.link-arrow:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}

/* ---------- 深色图文板块 ---------- */
.dark-band{
  position:relative;
  background:var(--ink);
  color:#fff;
  border-radius:24px;
  padding:36px 28px;
  overflow:hidden;
}
.dark-band::after{
  content:"";
  position:absolute;
  right:-80px;
  top:-80px;
  width:280px;
  height:280px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(42,79,215,.35) 0%,rgba(42,79,215,0) 70%);
  pointer-events:none;
}
.band-grid{
  position:relative;
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
.band-eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  color:#9AB6FF;
  margin-bottom:14px;
}
.dark-band h2{color:#fff;margin-bottom:16px}
.band-lead{color:#B9C4D6;font-size:15.5px;line-height:1.8;margin-bottom:24px}
.band-points{display:grid;gap:16px}
.band-points li{
  display:flex;
  gap:14px;
  padding-bottom:16px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.band-points li:last-child{border-bottom:0;padding-bottom:0}
.band-dot{
  flex:none;
  width:10px;
  height:10px;
  margin-top:9px;
  border-radius:3px;
  background:var(--teal);
}
.band-points strong{
  display:block;
  font-size:16px;
  color:#fff;
  margin-bottom:4px;
}
.band-points p{
  font-size:14px;
  line-height:1.8;
  color:#B9C4D6;
}
.band-figure{
  border-radius:var(--r16);
  overflow:hidden;
  aspect-ratio:16/9;
  background:#22304A;
  margin-bottom:20px;
}
.band-figure img{width:100%;height:100%;object-fit:cover}
.metric-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:rgba(255,255,255,.12);
  border-radius:var(--r12);
  overflow:hidden;
}
.metric{
  background:#1B2A44;
  padding:16px 14px;
}
.metric b{
  display:block;
  font-size:26px;
  font-weight:700;
  line-height:1.2;
  color:#9AB6FF;
  font-variant-numeric:tabular-nums;
  margin-bottom:6px;
}
.metric span{
  display:block;
  font-size:12.5px;
  line-height:1.6;
  color:#B9C4D6;
}

/* ---------- 对照表 ---------- */
.table-wrap{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r16);
  box-shadow:var(--sh1);
  overflow-x:auto;
}
table.compare{
  width:100%;
  min-width:780px;
  border-collapse:collapse;
  font-size:14.5px;
}
table.compare caption{
  caption-side:top;
  text-align:left;
  padding:18px 20px 0;
  font-size:13.5px;
  color:var(--ink-3);
}
table.compare th{
  text-align:left;
  font-weight:600;
  color:var(--ink);
  background:#F7F9FC;
  padding:14px 20px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.compare td{
  padding:14px 20px;
  color:var(--ink-2);
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
table.compare tbody tr:nth-child(even){background:#FAFBFE}
table.compare tbody tr:last-child td{border-bottom:0}
table.compare td:first-child{color:var(--ink);font-weight:600}

/* ---------- 步骤清单 ---------- */
.steps-grid{margin-bottom:-20px}
.step-cell{padding-bottom:20px}
.step{
  display:flex;
  gap:14px;
  height:100%;
  padding:20px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r16);
  box-shadow:var(--sh1);
  transition:box-shadow .18s ease,border-color .18s ease;
}
.step:hover{box-shadow:var(--sh2);border-color:rgba(42,79,215,.3)}
.step-no{
  flex:none;
  display:grid;
  place-items:center;
  width:28px;
  height:28px;
  border-radius:50%;
  background:rgba(42,79,215,.08);
  color:var(--brand);
  font-size:14px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:16.5px;margin-bottom:6px}
.step p{font-size:14px;line-height:1.8;color:var(--ink-2)}

/* ---------- 问答 ---------- */
.qa-grid{margin-bottom:-20px}
.qa-cell{padding-bottom:20px}
.qa-card{
  height:100%;
  padding:22px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r16);
  box-shadow:var(--sh1);
  transition:box-shadow .18s ease,transform .18s ease;
}
.qa-card:hover{box-shadow:var(--sh2);transform:translateY(-2px)}
.qa-card h3{
  display:flex;
  gap:10px;
  font-size:16.5px;
  line-height:1.55;
  margin-bottom:10px;
}
.q-mark{
  flex:none;
  color:var(--teal);
  font-weight:700;
}
.qa-card p{font-size:14.5px;line-height:1.8;color:var(--ink-2)}

/* ---------- CTA ---------- */
.cta-band{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:32px;
  background:var(--brand-soft);
  border-radius:var(--r16);
  border:1px solid #D9E3FF;
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:8px}
.cta-band p{color:var(--ink-2);font-size:15px;max-width:600px;line-height:1.8}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

.back-home{padding:0 0 8px}
.back-home a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:600;
  color:var(--brand);
}
.back-home a .arw{transition:transform .18s ease}
.back-home a:hover .arw{transform:translateX(-3px)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:#fff;
  padding:56px 0 24px;
  margin-top:56px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
.site-footer .logo{color:#fff}
.site-footer .logo:hover{color:#fff}
.footer-desc{
  margin-top:14px;
  max-width:340px;
  font-size:14px;
  line-height:1.85;
  color:#B9C4D6;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:12px;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:#B9C4D6;
  padding:6px 0;
}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  margin-top:36px;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;
  color:#8895A8;
}

/* ---------- 响应式 ---------- */
@media (min-width:768px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}
  .section{padding:64px 0}
  .dark-band{padding:44px 36px}
  .cta-band{padding:36px}
}

@media (min-width:1024px){
  .grid-container{padding-left:32px;padding-right:32px}
  .section{padding:88px 0}
  .hero{padding:56px 0 88px}
  .band-grid{grid-template-columns:1fr 1fr;gap:48px;align-items:center}
  .dark-band{padding:52px 48px}
  .cta-band{padding:40px}
}

@media (max-width:1023px){
  .nav-links,.nav-search,.header-tools .btn-ghost{display:none}
  .nav-toggle{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-note{position:static;width:100%;margin-top:16px;box-shadow:var(--sh1)}
  .hero-figure{aspect-ratio:16/10}
}

@media (max-width:640px){
  .header-inner{gap:12px}
  .header-tools{gap:8px}
  .btn{width:auto}
  .hero-actions .btn,.cta-actions .btn{flex:1 1 100%}
  .hero-lead{font-size:16.5px}
  .metric b{font-size:22px}
  .trust-list li{width:calc(50% - 11px)}
  .section-title{padding-left:14px}
  .hero-note img{width:48px;height:48px}
  .device-card,.qa-card,.step{padding:18px}
}

/* roulang page: category4 */
:root{
  --brand:#2A4FD7;
  --brand-soft:#EAF0FF;
  --brand-deep:#1E3CAE;
  --teal:#0FA3B1;
  --amber:#F26A2E;
  --amber-deep:#D9551B;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4EAF3;
  --line-weak:#D8E1EF;
  --ink:#16233A;
  --ink-2:#4A5A73;
  --ink-3:#8895A8;
  --r-s:8px;
  --r-m:12px;
  --r-l:16px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(22,35,58,.06);
  --sh2:0 6px 20px rgba(22,35,58,.08);
  --sh3:0 16px 40px rgba(22,35,58,.10);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-deep)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;margin:0}
ul,ol{padding:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:var(--sh1)}
.nav-wrap{
  max-width:1200px;margin:0 auto;padding:0 20px;height:68px;
  display:flex;align-items:center;gap:32px;
}
@media (min-width:1024px){.nav-wrap{padding:0 32px}}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;
}
.logo:hover{color:var(--ink)}
.logo-mark{
  position:relative;flex:none;width:20px;height:20px;border-radius:6px;background:var(--brand);
}
.logo-mark::after{
  content:"";position:absolute;inset:6px;border-radius:2px;background:#fff;
}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{
  position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-17px;height:2px;border-radius:2px;
  background:var(--brand);opacity:0;transform:scaleX(.4);transition:opacity .18s ease,transform .18s ease;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{opacity:1;transform:scaleX(1)}
.nav-links a.is-active{color:var(--brand);font-weight:600}
.nav-links a.is-active::after{opacity:1;transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-links + .nav-actions{margin-left:0}
.nav-search{position:relative;width:220px}
.nav-search svg{
  position:absolute;left:14px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;stroke:var(--ink-3);fill:none;stroke-width:1.8;stroke-linecap:round;
}
.nav-search input{
  width:100%;height:38px;border-radius:var(--r-pill);border:1px solid transparent;
  background:#F0F3F9;padding:0 16px 0 38px;font-size:14px;color:var(--ink);
  outline:none;transition:background .18s,border-color .18s,box-shadow .18s;margin:0;
}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search input:focus{
  background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(42,79,215,.10);
}
.nav-toggle{
  display:none;width:48px;height:48px;padding:0;border:1px solid var(--line);
  border-radius:var(--r-m);background:#fff;align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .22s ease,opacity .22s ease}
.nav-toggle.is-open span:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle.is-open span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-amber{background:var(--amber);color:#fff}
.btn-amber:hover{background:var(--amber-deep);color:#fff;transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);color:#fff}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-deep)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(22,35,58,.42);z-index:70;
  opacity:0;pointer-events:none;transition:opacity .28s ease;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86vw;max-width:360px;z-index:80;
  background:#fff;box-shadow:var(--sh3);transform:translateX(100%);
  transition:transform .3s ease;display:flex;flex-direction:column;
  padding:22px 20px;overflow-y:auto;
}
.drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-close{
  width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:var(--r-m);
  color:var(--ink-2);font-size:20px;line-height:1;
}
.drawer-links{display:flex;flex-direction:column;margin:12px 0 20px}
.drawer-links a{
  font-size:18px;line-height:56px;color:var(--ink-2);border-bottom:1px solid var(--line);
}
.drawer-links a.is-active{color:var(--brand);font-weight:600}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px}
.drawer-foot .btn{width:100%}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  list-style:none;font-size:13.5px;color:var(--ink-3);padding-top:24px;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:6px}
.breadcrumb li:not(:last-child)::after{content:"/";color:var(--line-weak)}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb li[aria-current]{color:var(--brand);font-weight:600}

/* ---------- page head ---------- */
.page-head{padding-bottom:8px}
.head-grid{display:grid;grid-template-columns:1fr;gap:28px;padding:24px 0 8px;align-items:center}
@media (min-width:1024px){
  .head-grid{grid-template-columns:1.15fr .85fr;gap:44px;padding:32px 0 12px}
}
.badge-teal{
  display:inline-block;font-size:12.5px;font-weight:600;color:var(--teal);
  background:rgba(15,163,177,.12);border-radius:var(--r-pill);padding:3px 12px;
  margin-bottom:14px;
}
.page-head h1{
  font-size:clamp(30px,4.2vw,44px);line-height:1.25;font-weight:700;letter-spacing:-.01em;
  color:var(--ink);
}
.lede{
  margin-top:16px;max-width:640px;font-size:17px;line-height:1.75;color:var(--ink-2);
}
.head-figure{
  border-radius:var(--r-l);overflow:hidden;box-shadow:var(--sh2);
  border:1px solid var(--line);background:#F0F3F9;
}
.head-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ---------- sections ---------- */
.section{padding:48px 0}
@media (min-width:1024px){.section{padding:72px 0}}
.section-title{
  position:relative;padding-left:14px;
  font-size:clamp(22px,2.4vw,30px);line-height:1.35;font-weight:700;letter-spacing:-.01em;
  margin-bottom:12px;
}
.section-title::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--brand);
}
.section-sub{color:var(--ink-2);font-size:15px;max-width:700px;margin-bottom:28px}

/* ---------- filter chips ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border-radius:var(--r-pill);font-size:14px;border:1px solid var(--line-weak);
  background:#fff;color:var(--ink-2);transition:background .18s,border-color .18s,color .18s;
}
a.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.chip.is-current{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;cursor:default}
.chip.is-muted{background:#F0F3F9;border-color:transparent;color:var(--ink-3);cursor:not-allowed}

/* ---------- faq ---------- */
.faq-columns{display:grid;grid-template-columns:1fr;gap:16px}
@media (min-width:1024px){.faq-columns{grid-template-columns:1fr 1fr;gap:24px}}
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--sh1);overflow:hidden;scroll-margin-top:92px;
  transition:box-shadow .18s ease,border-color .18s ease,transform .18s ease;
}
.faq-item:hover{box-shadow:var(--sh2)}
.faq-item.is-open{border-color:#CBD7EC;box-shadow:var(--sh2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;background:#fff;border:0;padding:18px 20px;
  font-size:16px;font-weight:600;line-height:1.5;color:var(--ink);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{position:relative;flex:none;width:20px;height:20px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .25s ease;
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item.is-open .faq-icon::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--ink-2)}
.faq-a-inner p + p{margin-top:10px}

/* ---------- check cards ---------- */
.check-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.check-grid{grid-template-columns:repeat(3,1fr)}}
.info-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);
  padding:24px;box-shadow:var(--sh1);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.info-card:hover{box-shadow:var(--sh2);transform:translateY(-2px);border-color:#CBD7EC}
.info-card .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:var(--r-pill);
  background:rgba(42,79,215,.08);color:var(--brand);font-size:14px;font-weight:700;
  margin-bottom:12px;
}
.info-card h3{font-size:18px;font-weight:600;line-height:1.45;margin-bottom:8px}
.info-card p{font-size:14px;line-height:1.75;color:var(--ink-2)}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--brand-soft);border-radius:var(--r-l);padding:32px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.4;margin-bottom:8px}
.cta-band p{font-size:15px;color:var(--ink-2);max-width:640px}
.back-row{margin-top:28px}

/* ---------- text link ---------- */
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand)}
.back-link .arrow{transition:transform .18s ease}
.back-link:hover .arrow{transform:translateX(4px)}

/* ---------- footer ---------- */
.site-footer{background:#16233A;color:#B9C4D6;padding:56px 0 0;margin-top:64px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}}
.site-footer .logo{color:#fff}
.site-footer .logo:hover{color:#fff}
.footer-desc{font-size:14px;line-height:1.75;color:#93A2BA;margin-top:14px;max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:12px}
.footer-col a{display:block;font-size:14px;color:#B9C4D6;padding:6px 0;transition:color .18s ease}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:40px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:13px;color:#8291A9;
}

/* ---------- responsive nav ---------- */
@media (max-width:1023px){
  .nav-links,.nav-search{display:none}
  .nav-toggle{display:flex}
  .nav-actions{gap:10px}
  .nav-actions .btn-ghost{display:none}
}
@media (min-width:1024px){
  .drawer,.drawer-mask{display:none}
}
@media (max-width:639px){
  .section{padding:48px 0}
  .cta-band{padding:24px;flex-direction:column;align-items:flex-start}
  .cta-band .btn{width:100%}
  .faq-q{font-size:15.5px;padding:16px 18px}
  .faq-a-inner{padding:0 18px 18px}
}

/* roulang page: category5 */
:root{
  --brand:#2A4FD7;
  --brand-deep:#1E3CAE;
  --brand-soft:#EAF0FF;
  --teal:#0FA3B1;
  --teal-deep:#0B7C87;
  --orange:#F26A2E;
  --orange-deep:#D9551B;
  --bg:#F5F7FB;
  --surface:#FFFFFF;
  --line:#E4EAF3;
  --line-weak:#D8E1EF;
  --ink:#16233A;
  --ink-2:#4A5A73;
  --ink-3:#8895A8;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(22,35,58,.06);
  --sh2:0 6px 20px rgba(22,35,58,.08);
  --sh3:0 16px 40px rgba(22,35,58,.10);
  --max:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-deep);}
img{max-width:100%;display:block;height:auto;}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:14px;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:var(--r-sm);}
.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.container.grid-container{
  padding-left:20px;
  padding-right:20px;
  max-width:var(--max);
}
@media (min-width:1024px){
  .container,.container.grid-container{padding-left:32px;padding-right:32px;}
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh1);}
.header-inner{
  display:flex;
  align-items:center;
  gap:32px;
  height:68px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:-0.01em;
  white-space:nowrap;
}
.logo:hover{color:var(--brand);}
.logo-mark{
  width:20px;
  height:20px;
  flex:0 0 20px;
  border-radius:6px;
  background:var(--brand);
  position:relative;
  display:inline-block;
}
.logo-mark::before{
  content:"";
  position:absolute;
  left:5px;top:5px;
  width:6px;height:6px;
  background:#fff;
  border-radius:2px;
}
.logo-mark::after{
  content:"";
  position:absolute;
  right:5px;bottom:5px;
  width:6px;height:6px;
  background:#fff;
  border-radius:2px;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:26px;
}
.nav-links a{
  position:relative;
  font-size:15px;
  color:var(--ink-2);
  padding:6px 0;
  white-space:nowrap;
  transition:color .18s ease;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-8px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .18s ease;
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--brand);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}

.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:12px;
}
.search-box{position:relative;width:220px;}
.search-box svg{
  position:absolute;
  left:14px;
  top:50%;
  transform:translateY(-50%);
  width:16px;height:16px;
  stroke:var(--ink-3);
  pointer-events:none;
}
.search-box input{
  width:100%;
  height:38px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  background:#F0F3F9;
  padding:0 16px 0 38px;
  color:var(--ink);
  transition:background .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.search-box input::placeholder{color:var(--ink-3);}
.search-box input:focus{
  outline:none;
  background:#fff;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(42,79,215,.10);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 24px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--orange);color:#fff;}
.btn-primary:hover{background:var(--orange-deep);color:#fff;transform:translateY(-1px);box-shadow:var(--sh2);}
.btn-outline{border-color:var(--brand);color:var(--brand);background:#fff;}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-deep);}
.btn-ghost{
  height:38px;
  padding:0 18px;
  font-size:14px;
  border:1px solid var(--line-weak);
  color:var(--brand);
  background:#fff;
}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-soft);}
.btn-nav-cta{
  height:40px;
  padding:0 20px;
  font-size:14px;
  font-weight:700;
  background:var(--orange);
  color:#fff;
}
.btn-nav-cta:hover{background:var(--orange-deep);color:#fff;transform:translateY(-1px);}
.hamburger{
  display:none;
  width:48px;
  height:48px;
  border-radius:12px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:6px;
  border:1px solid var(--line-weak);
  background:#fff;
}
.hamburger span{
  display:block;
  width:20px;
  height:2px;
  background:var(--ink);
  border-radius:2px;
}
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(22,35,58,.42);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
  z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;
  top:0;right:0;
  height:100%;
  width:86vw;
  max-width:380px;
  background:#fff;
  box-shadow:var(--sh3);
  z-index:80;
  transform:translateX(105%);
  transition:transform .28s ease;
  display:flex;
  flex-direction:column;
  padding:20px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
  margin-bottom:8px;
}
.drawer-close{
  width:40px;height:40px;
  border-radius:10px;
  display:grid;place-items:center;
  color:var(--ink-2);
  font-size:22px;
  line-height:1;
}
.drawer-close:hover{background:#F0F3F9;}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  font-size:18px;
  color:var(--ink);
  line-height:56px;
  border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand);font-weight:600;}
.drawer-foot{margin-top:auto;padding-top:18px;}
.drawer-foot .btn{width:100%;}

@media (max-width:1023px){
  .nav-links,.search-box{display:none;}
  .hamburger{display:inline-flex;}
  .btn-ghost{display:none;}
  .header-inner{gap:16px;}
}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;}
@media (min-width:1024px){.section{padding:84px 0;}}
.section-tight{padding:40px 0;}
@media (min-width:1024px){.section-tight{padding:56px 0;}}
.section-head{margin-bottom:32px;}
.section-head h2{
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.3;
  font-weight:700;
  letter-spacing:-0.01em;
  color:var(--ink);
}
.section-head p{
  margin-top:12px;
  font-size:16px;
  color:var(--ink-2);
  max-width:640px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  font-weight:600;
  color:var(--teal-deep);
  background:rgba(15,163,177,.12);
  border-radius:var(--r-pill);
  padding:3px 12px;
  margin-bottom:16px;
}
.lead{
  font-size:17px;
  line-height:1.8;
  color:var(--ink-2);
  max-width:660px;
}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh1);
  padding:24px;
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.card:hover{box-shadow:var(--sh2);transform:translateY(-2px);}
.card h3{
  font-size:18px;
  line-height:1.45;
  font-weight:600;
  color:var(--ink);
  margin-bottom:10px;
}
.card p{font-size:14.5px;line-height:1.75;color:var(--ink-2);}
.grid-2{display:grid;grid-template-columns:1fr;gap:20px;}
.grid-3{display:grid;grid-template-columns:1fr;gap:20px;}
.grid-4{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:640px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}
}
@media (min-width:1024px){
  .grid-2{grid-template-columns:repeat(2,1fr);gap:24px;}
  .grid-3{grid-template-columns:repeat(3,1fr);gap:24px;}
  .grid-4{grid-template-columns:repeat(4,1fr);gap:24px;}
}
.badge{
  display:inline-flex;
  align-items:center;
  font-size:12.5px;
  font-weight:600;
  padding:3px 10px;
  border-radius:var(--r-pill);
}
.badge-teal{color:var(--teal-deep);background:rgba(15,163,177,.12);}
.badge-gray{color:var(--ink-2);background:#F0F3F9;}
.badge-brand{color:var(--brand);background:var(--brand-soft);}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:600;
  color:var(--brand);
}
.link-more .arrow{transition:transform .18s ease;display:inline-block;}
.link-more:hover .arrow{transform:translateX(2px);}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-top:24px;font-size:13.5px;color:var(--ink-3);}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li:not(:last-child)::after{content:"/";color:var(--line-weak);}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb li[aria-current]{color:var(--brand);font-weight:600;}

/* ---------- 页头 ---------- */
.page-head{padding:28px 0 8px;}
.page-head h1{
  font-size:clamp(28px,4.2vw,46px);
  line-height:1.25;
  font-weight:700;
  letter-spacing:-0.01em;
  color:var(--ink);
  margin-bottom:18px;
  max-width:860px;
}
.page-head .lead{max-width:720px;}
.head-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}

/* ---------- 图文概览 ---------- */
.overview{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:center;
}
@media (min-width:900px){
  .overview{grid-template-columns:5fr 7fr;gap:40px;}
}
.overview-media{
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh2);
  background:#EFF3FA;
  aspect-ratio:4/3;
}
.overview-media img{width:100%;height:100%;object-fit:cover;}
.overview-body h2{
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.35;
  font-weight:700;
  margin-bottom:16px;
}
.overview-body p{font-size:16px;line-height:1.8;color:var(--ink-2);margin-bottom:14px;}
.check-list{display:flex;flex-direction:column;gap:12px;margin-top:8px;}
.check-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:15px;
  color:var(--ink-2);
  line-height:1.7;
}
.check-list li svg{
  flex:0 0 18px;
  width:18px;height:18px;
  margin-top:4px;
  stroke:var(--brand);
}

/* ---------- 时间线 ---------- */
.timeline{
  display:grid;
  grid-template-columns:1fr;
  gap:28px;
  counter-reset:step;
}
@media (min-width:1024px){
  .timeline{grid-template-columns:repeat(5,1fr);gap:20px;}
}
.step{position:relative;}
.step-top{position:relative;display:flex;align-items:center;margin-bottom:16px;}
.step-num{
  width:44px;height:44px;
  flex:0 0 44px;
  border-radius:50%;
  background:var(--brand-soft);
  color:var(--brand);
  font-weight:700;
  font-size:16px;
  display:grid;
  place-items:center;
  border:2px solid #fff;
  box-shadow:0 0 0 1px var(--line);
  position:relative;
  z-index:2;
  font-variant-numeric:tabular-nums;
}
@media (min-width:1024px){
  .step:not(:last-child) .step-top::after{
    content:"";
    position:absolute;
    left:52px;
    right:-20px;
    top:21px;
    height:2px;
    background:var(--line);
    z-index:1;
  }
}
.step h3{
  font-size:18px;
  font-weight:600;
  line-height:1.45;
  margin-bottom:8px;
  color:var(--ink);
}
.step p{font-size:14.5px;line-height:1.75;color:var(--ink-2);}
.step .badge{margin-top:12px;}
@media (max-width:1023px){
  .step{padding-left:64px;padding-bottom:4px;}
  .step-top{position:absolute;left:0;top:0;margin:0;}
  .step::before{
    content:"";
    position:absolute;
    left:21px;
    top:44px;
    bottom:-24px;
    width:2px;
    background:var(--line);
  }
  .step:last-child::before{display:none;}
}

/* ---------- 说明条 ---------- */
.notice{
  display:flex;
  gap:16px;
  align-items:flex-start;
  background:var(--brand-soft);
  border:1px solid #D9E3FF;
  border-radius:var(--r-lg);
  padding:22px 24px;
}
.notice svg{flex:0 0 22px;width:22px;height:22px;stroke:var(--brand);margin-top:3px;}
.notice p{font-size:15px;line-height:1.8;color:var(--ink-2);}
.notice strong{color:var(--ink);font-weight:600;}

/* ---------- 补充卡 ---------- */
.supp-card h3{display:flex;align-items:center;gap:10px;}
.icon-box{
  width:36px;height:36px;
  border-radius:10px;
  background:var(--brand-soft);
  display:grid;
  place-items:center;
  flex:0 0 36px;
}
.icon-box svg{width:20px;height:20px;stroke:var(--brand);}
.plain-list{margin-top:14px;display:flex;flex-direction:column;}
.plain-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14.5px;
  line-height:1.75;
  color:var(--ink-2);
  padding:12px 0;
  border-top:1px solid var(--line);
}
.plain-list li:first-child{border-top:none;padding-top:4px;}
.plain-list .dot{
  flex:0 0 6px;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--brand);
  margin-top:9px;
}

/* ---------- 支持范围 ---------- */
.scope-card{display:flex;flex-direction:column;height:100%;}
.scope-card .icon-box{margin-bottom:16px;width:44px;height:44px;border-radius:12px;}
.scope-card .icon-box svg{width:24px;height:24px;}
.scope-card p{flex:1;}
.scope-card .scope-link{margin-top:16px;font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.scope-card:hover{border-color:#C7D5F5;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh1);
  overflow:hidden;
  transition:box-shadow .18s ease,border-color .18s ease;
}
.faq-item:hover{box-shadow:var(--sh2);}
.faq-item.is-open{border-color:#C7D5F5;}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:56px;
  padding:16px 22px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  line-height:1.55;
}
.faq-icon{
  position:relative;
  flex:0 0 20px;
  width:20px;height:20px;
  transition:transform .2s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--brand);
  border-radius:2px;
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px;}
.faq-icon::after{left:9px;top:0;width:2px;height:20px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s ease;
}
.faq-a-inner{
  padding:0 22px 18px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-2);
}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-soft);
  border-radius:var(--r-lg);
  padding:32px;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:22px;
}
@media (min-width:900px){
  .cta-band{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    padding:40px;
    gap:32px;
  }
}
.cta-band h2{
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.35;
  font-weight:700;
  color:var(--ink);
  margin-bottom:10px;
}
.cta-band p{font-size:15px;line-height:1.75;color:var(--ink-2);max-width:560px;}
.back-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:600;
  color:var(--brand);
  margin-top:24px;
}
.back-link .arrow{transition:transform .18s ease;}
.back-link:hover .arrow{transform:translateX(-2px);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:#B9C4D6;
  padding:56px 0 24px;
  margin-top:24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
@media (min-width:760px){
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:36px;}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;}
}
.site-footer .logo{color:#fff;font-size:17px;}
.site-footer .logo:hover{color:#fff;}
.site-footer .logo-mark{background:var(--brand);}
.footer-desc{
  margin-top:16px;
  font-size:14px;
  line-height:1.8;
  color:#B9C4D6;
  max-width:340px;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:14px;
}
.footer-col a{
  display:block;
  font-size:14px;
  line-height:1.7;
  color:#B9C4D6;
  padding:6px 0;
}
.footer-col a:hover{color:#fff;text-decoration:underline;}
.footer-bottom{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:#8895A8;
}

/* ---------- 响应式微调 ---------- */
@media (max-width:639px){
  .card:hover{transform:none;}
  .btn{width:100%;}
  .header-actions .btn-nav-cta{width:auto;}
  .cta-band .btn{width:100%;}
  .step h3{font-size:17px;}
  .faq-q{font-size:15.5px;padding:16px 18px;}
  .faq-a-inner{padding:0 18px 16px;}
}