/* 小坡险知识网络 · 共享设计系统（沿用 iul.sg 线上版本的字体与配色口径） */
:root{
  --canvas:#fff;--surface:#fff;--surface-2:#f3f4f5;--surface-3:#e9ebee;
  --text:#222;--muted:#61666b;--line:#d7d9dc;--line-soft:#e6e8eb;
  --ink:#343a40;--ink-dark:#272c31;--navy:#141c28;--navy-2:#1f2a3a;
  --accent:#d9272e;--accent-dark:#b91f27;--accent-soft:#fdeeee;
  --ok:#2f7d4f;--warn:#b8860b;
  --radius:4px;--radius-lg:10px;--shadow:0 4px 14px rgba(0,0,0,.08);
  --font-sans:"IBM Plex Sans","Helvetica Neue",Helvetica,Arial,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --type-display:clamp(34px,3.6vw,48px);--type-section:clamp(26px,2.4vw,32px);--type-sub:clamp(20px,1.8vw,24px);
  --type-lead:clamp(16px,1.3vw,18px);--type-body:16px;--type-secondary:14px;--type-caption:12px;--type-micro:11px;
  --leading-body:1.75;--max:1180px;--gutter:5vw;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--canvas);color:var(--text);font-family:var(--font-sans);font-size:var(--type-body);line-height:var(--leading-body)}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}
h1,h2,h3,h4{margin-top:0;letter-spacing:-.02em;line-height:1.25;font-weight:700}
p{margin-top:0}
table{border-collapse:collapse;width:100%;font-size:var(--type-secondary)}
th,td{padding:10px 12px;border:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--surface-2);font-weight:700}
code{font-family:"IBM Plex Mono",SFMono-Regular,Menlo,monospace;font-size:.92em;background:var(--surface-2);padding:1px 5px;border-radius:3px}
blockquote{margin:0 0 20px;padding:14px 18px;border-left:3px solid var(--accent);background:var(--surface-2);color:var(--ink)}
hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--text);color:#fff;padding:8px 12px;z-index:100}
.skip-link:focus{left:8px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}

/* 顶栏 */
.update-bar{background:var(--navy);color:#cfd5de;font-size:var(--type-micro);padding:7px var(--gutter)}
.update-bar .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:0}
.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-soft)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-logo{width:40px;height:42px;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-wordmark{font-size:22px;font-weight:800;letter-spacing:-.03em;line-height:1.1;color:var(--navy)}
.brand-descriptor{color:var(--muted);font-size:var(--type-micro);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.language-switch{min-width:42px;padding:8px 10px;border:1px solid var(--line);border-radius:999px;text-align:center;font-size:var(--type-caption);font-weight:600}
.header-quote,.primary-action{display:inline-flex;min-height:42px;padding:10px 18px;align-items:center;justify-content:center;border:1px solid var(--accent);border-radius:var(--radius);background:var(--accent);color:#fff;font-weight:700;font-size:13px;white-space:nowrap}
.header-quote:hover,.primary-action:hover{background:var(--accent-dark);border-color:var(--accent-dark)}
.secondary-action{display:inline-flex;min-height:42px;padding:10px 18px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);font-weight:700;font-size:13px}
.secondary-action:hover{border-color:var(--ink)}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:var(--radius);padding:8px 10px;font-size:13px}
.topic-nav{background:var(--navy);border-bottom:1px solid var(--navy-2)}
.topic-nav .wrap{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.topic-nav .wrap::-webkit-scrollbar{display:none}
.topic-nav-link{display:inline-block;padding:13px 14px;color:#d7dce4;font-size:13px;font-weight:600;white-space:nowrap;border-bottom:3px solid transparent}
.topic-nav-link:hover{color:#fff}
.topic-nav-link.active{color:#fff;border-bottom-color:var(--accent)}

/* 首页 Hero */
.home-hero{position:relative;background:linear-gradient(135deg,#0f1622 0%,#1b2537 55%,#243247 100%);color:#fff;overflow:hidden}
.home-hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse at 70% 30%,#000 30%,transparent 75%)}
.home-hero .wrap{position:relative;padding-top:clamp(56px,7vw,96px);padding-bottom:clamp(40px,5vw,64px)}
.hero-copy{max-width:760px}
.page-kicker,.section-label{display:block;margin-bottom:14px;color:var(--accent);font-size:var(--type-micro);font-weight:800;letter-spacing:.14em;text-transform:uppercase}
.home-hero .page-kicker{color:#f1a3a7}
.hero-copy h1{font-size:var(--type-display);margin-bottom:18px;line-height:1.15}
.hero-copy .lead{font-size:var(--type-lead);color:#d9dee6;max-width:680px;margin-bottom:26px}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.hero-actions .secondary-action{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.hero-actions .secondary-action:hover{border-color:#fff}
.home-evidence-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:40px}
.home-evidence-strip a,.home-evidence-strip div{display:flex;flex-direction:column;gap:6px;padding:18px 20px;background:#fff;color:var(--text);border-radius:var(--radius);box-shadow:var(--shadow);position:relative}
.home-evidence-strip strong{font-size:22px;letter-spacing:-.02em;color:var(--navy)}
.home-evidence-strip span{font-size:var(--type-caption);color:var(--muted)}
.home-evidence-strip b{position:absolute;right:14px;top:14px;color:var(--accent);font-weight:700}

/* 通用区块 */
section.block{padding:clamp(44px,6vw,72px) 0;border-bottom:1px solid var(--line-soft)}
section.block.alt{background:var(--surface-2)}
.section-heading{max-width:780px;margin-bottom:30px}
.section-heading h2{font-size:var(--type-section);margin-bottom:12px}
.section-heading p{color:var(--muted);font-size:var(--type-lead);margin:0}
.brief-points{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.brief-points article{padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.brief-points article span{display:block;color:var(--accent);font-weight:800;font-size:var(--type-caption);letter-spacing:.1em;margin-bottom:10px}
.brief-points h3{font-size:18px;margin-bottom:8px}
.brief-points p{color:var(--muted);font-size:var(--type-secondary);margin:0}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{display:flex;flex-direction:column;gap:8px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:border-color .15s,box-shadow .15s}
.card:hover{border-color:var(--ink);box-shadow:var(--shadow)}
.card .card-type{color:var(--accent);font-size:var(--type-micro);font-weight:800;letter-spacing:.12em;text-transform:uppercase}
.card h3{font-size:18px;margin:0}
.card p{color:var(--muted);font-size:var(--type-secondary);margin:0;flex:1}
.card .card-meta{color:var(--muted);font-size:var(--type-caption)}
.audience-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;list-style:none;padding:0;margin:0}
.audience-list li{padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);font-size:var(--type-secondary)}
.audience-list li:before{content:"✓";color:var(--ok);font-weight:800;margin-right:8px}

/* 文章页 */
.page-head{padding:clamp(36px,5vw,56px) 0 24px;border-bottom:1px solid var(--line-soft)}
.breadcrumb{font-size:var(--type-caption);color:var(--muted);margin-bottom:16px}
.breadcrumb ol{list-style:none;padding:0;margin:0;display:flex;gap:6px;flex-wrap:wrap}
.breadcrumb li+li:before{content:"/";margin-right:6px;color:var(--line)}
.page-head h1{font-size:var(--type-display);max-width:900px;margin-bottom:14px}
.page-head .page-desc{font-size:var(--type-lead);color:var(--muted);max-width:780px;margin-bottom:14px}
.page-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:var(--type-caption);color:var(--muted)}
.page-meta span b{color:var(--text);font-weight:600}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:clamp(32px,5vw,72px);padding:36px 0 64px}
.article-body{min-width:0;max-width:780px}
.article-body h2{font-size:var(--type-section);margin:44px 0 16px;padding-top:8px;scroll-margin-top:120px}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:var(--type-sub);margin:30px 0 12px;scroll-margin-top:120px}
.article-body h4{font-size:16px;margin:22px 0 8px}
.article-body p,.article-body ul,.article-body ol{margin-bottom:18px}
.article-body li{margin-bottom:6px}
.article-body ul,.article-body ol{padding-left:1.4em}
.article-body table{margin:0 0 24px;display:block;overflow-x:auto;white-space:normal}
.article-body table thead,.article-body table tbody{display:table;width:100%}
.article-body strong{font-weight:700;color:var(--ink-dark)}
.summary-box{margin:0 0 30px;padding:20px 22px;background:var(--surface-2);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:var(--radius)}
.summary-box h2{font-size:14px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin:0 0 10px;padding:0}
.summary-box ul{margin:0;padding-left:1.2em}
.summary-box li{margin-bottom:6px;font-size:15px}
.callout{margin:0 0 24px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;font-size:15px}
.callout.warn{border-color:#ead9a5;background:#fff9e8}
.callout b{color:var(--ink-dark)}
.sources{margin-top:48px;padding-top:24px;border-top:1px solid var(--line)}
.sources h2{font-size:var(--type-sub);margin-bottom:12px}
.sources ol{padding-left:1.3em;font-size:var(--type-secondary);color:var(--muted)}
.sources li{margin-bottom:8px;word-break:break-all}
.sources a{color:var(--ink);text-decoration:underline;text-decoration-color:var(--line)}
.related{margin-top:40px}
.related h2{font-size:var(--type-sub);margin-bottom:14px}
.related-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;list-style:none;padding:0;margin:0}
.related-list li a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);font-size:var(--type-secondary);font-weight:600}
.related-list li a:hover{border-color:var(--ink)}
.related-list li a small{display:block;font-weight:400;color:var(--muted);margin-top:4px}
.sidebar{position:sticky;top:120px;align-self:start;display:flex;flex-direction:column;gap:20px}
.toc{padding:18px 18px 10px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.toc h2{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc ol{list-style:none;padding:0;margin:0;counter-reset:toc}
.toc li{margin-bottom:8px;font-size:13px;line-height:1.4;counter-increment:toc;display:flex;gap:8px}
.toc li:before{content:counter(toc,decimal-leading-zero);color:var(--accent);font-weight:700;font-size:11px;margin-top:2px}
.toc a:hover{color:var(--accent)}
.side-cta{padding:20px;border-radius:var(--radius);background:var(--navy);color:#fff}
.side-cta h2{font-size:17px;margin-bottom:8px}
.side-cta p{font-size:13px;color:#c9d0da;margin-bottom:14px}
.side-cta .primary-action{width:100%}
.side-cta .side-link{display:block;margin-top:10px;font-size:13px;color:#fff;text-decoration:underline;text-decoration-color:rgba(255,255,255,.4)}

/* FAQ / 术语 */
.faq-group h2{font-size:var(--type-section)}
details.faq-item{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;background:#fff}
details.faq-item summary{cursor:pointer;padding:14px 18px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:12px;font-size:16px}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary:after{content:"+";color:var(--accent);font-weight:400;font-size:20px;line-height:1}
details.faq-item[open] summary:after{content:"–"}
details.faq-item .faq-answer{padding:0 18px 16px;color:var(--ink);font-size:15px}
details.faq-item .faq-answer p:last-child{margin-bottom:0}
.term-list dt{font-weight:700;font-size:17px;margin-top:22px;scroll-margin-top:120px}
.term-list dd{margin:6px 0 0;color:var(--ink);font-size:15px}
.steps{counter-reset:step;list-style:none;padding:0;margin:0 0 24px}
.steps>li{position:relative;padding:18px 18px 18px 64px;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;background:#fff;counter-increment:step}
.steps>li:before{content:counter(step,decimal-leading-zero);position:absolute;left:18px;top:16px;color:var(--accent);font-weight:800;font-size:20px}
.steps>li h3{font-size:17px;margin:0 0 6px}
.steps>li p:last-child{margin:0}

/* 联系区块与浮动栏 */
.contact-panel{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.contact-panel article{padding:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.contact-panel article h3{font-size:17px;margin-bottom:8px}
.contact-panel article p{font-size:var(--type-secondary);color:var(--muted);margin-bottom:10px}
.contact-panel article .value{font-size:18px;font-weight:700;color:var(--navy);word-break:break-all}
.contact-panel article .primary-action,.contact-panel article .secondary-action{margin-top:8px}
.qr-slot{display:grid;place-items:center;width:160px;height:160px;border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted);font-size:12px;text-align:center;background:var(--surface-2);margin-top:12px}
.qr-slot img{width:160px;height:160px;border-radius:var(--radius)}
.contact-rail{position:fixed;right:18px;bottom:28px;z-index:60;display:grid;gap:8px;width:210px}
.contact-rail a,.contact-rail button{display:flex;align-items:center;gap:10px;min-height:52px;padding:8px 12px;border:1px solid var(--line);background:#fff;border-radius:14px;box-shadow:var(--shadow);font:inherit;font-size:var(--type-caption);font-weight:700;color:var(--text);cursor:pointer;text-align:left;line-height:1.35}
.contact-rail a span,.contact-rail button span{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--accent);color:#fff;font-size:11px;flex:0 0 auto}
.contact-rail .rail-wechat span{background:var(--ink)}
.contact-rail .rail-email span{background:var(--navy)}
.contact-rail .rail-whatsapp{animation:rail-ring 2.8s ease-out infinite}
@keyframes rail-ring{0%{box-shadow:0 0 0 0 rgba(217,39,46,.35)}70%{box-shadow:0 0 0 12px rgba(217,39,46,0)}100%{box-shadow:0 0 0 0 rgba(217,39,46,0)}}
.mobile-contact-bar{display:none}
.wechat-modal{position:fixed;inset:0;z-index:80;display:none;place-items:center;background:rgba(20,28,40,.6);padding:20px}
.wechat-modal.open{display:grid}
.wechat-modal .modal-card{background:#fff;border-radius:var(--radius-lg);padding:28px;max-width:420px;width:100%;position:relative}
.wechat-modal h2{font-size:20px;margin-bottom:8px}
.wechat-modal p{font-size:14px;color:var(--muted)}
.wechat-modal .value{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius);font-weight:700;font-size:18px;margin:12px 0}
.wechat-modal .value button{font:inherit;font-size:12px;padding:6px 10px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;cursor:pointer}
.wechat-modal .close{position:absolute;right:12px;top:10px;border:0;background:transparent;font-size:22px;cursor:pointer;color:var(--muted)}

/* 站点网络 */
.network-groups{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.network-group h3{font-size:14px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.network-group ul{list-style:none;padding:0;margin:0}
.network-group li{margin-bottom:8px;font-size:var(--type-secondary)}
.network-group li a{font-weight:700}
.network-group li a:hover{color:var(--accent)}
.network-group li small{display:block;color:var(--muted);font-weight:400}
.network-group li.current a{color:var(--accent)}
.badge{display:inline-block;padding:2px 7px;border-radius:999px;font-size:10px;font-weight:700;letter-spacing:.06em;background:var(--surface-2);color:var(--muted);vertical-align:middle;margin-left:6px}
.badge.live{background:#e6f4ea;color:var(--ok)}

/* 页脚 */
.site-footer{background:var(--navy);color:#c9d0da;padding:48px 0 28px;font-size:13px}
.site-footer .wrap{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:32px}
.site-footer h4{color:#fff;font-size:12px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:8px}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-brand strong{display:block;color:#fff;font-size:18px;margin-bottom:8px}
.footer-brand p{color:#aeb7c4;font-size:12px;line-height:1.7}
.footer-contact li b{color:#fff;font-weight:600}
.footer-disclaimer{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.12);padding-top:20px;color:#9aa4b3;font-size:12px;line-height:1.7}
.footer-bottom{grid-column:1/-1;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:#8d97a6;font-size:12px;padding-top:12px}

/* 响应式 */
@media (max-width:1024px){
  .article-layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .toc{display:none}
  .brief-points,.card-grid,.contact-panel,.network-groups{grid-template-columns:repeat(2,1fr)}
  .site-footer .wrap{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .site-header .wrap{min-height:60px}
  .brand-wordmark{font-size:19px}
  .brand-descriptor{display:none}
  .header-quote{display:none}
  .home-evidence-strip,.brief-points,.card-grid,.contact-panel,.network-groups,.audience-list,.related-list{grid-template-columns:1fr}
  .site-footer .wrap{grid-template-columns:1fr}
  .contact-rail{display:none}
  .mobile-contact-bar{display:grid;grid-template-columns:1fr 1fr;position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 14px rgba(0,0,0,.08)}
  .mobile-contact-bar a,.mobile-contact-bar button{display:flex;align-items:center;justify-content:center;min-height:52px;font:inherit;font-weight:700;font-size:14px;border:0;background:#fff;color:var(--text);cursor:pointer}
  .mobile-contact-bar a.wa{background:var(--accent);color:#fff}
  body{padding-bottom:56px}
  .update-bar .wrap span:last-child{display:none}
}
@media print{.contact-rail,.mobile-contact-bar,.topic-nav,.side-cta,.update-bar{display:none!important}}