:root{--bg:#080A0D;--nav:#0D1015;--sub:#12161C;--panel:#171C23;--muted:#9098A3;--text:#C7CDD5;--white:#F5F7FA;--blue:#6EA8FF;--border:rgba(255,255,255,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}a:hover{color:#8ED8FF}button{font:inherit;cursor:pointer}img{max-width:100%}.container{max-width:1180px;margin:auto;padding:0 24px}.site-head{position:sticky;top:0;z-index:1000;background:var(--nav);border-bottom:1px solid var(--border)}.nav-wrap{height:70px;display:flex;align-items:center;gap:22px}.brand{display:inline-flex;align-items:center;min-width:122px}.logo-img{width:auto;height:36px;max-width:130px;object-fit:contain}.brand .media-placeholder{display:inline-block;width:110px;height:30px}.main-nav{display:flex;justify-content:center;align-items:center;gap:28px;flex:1;white-space:nowrap}.main-nav a{font-size:15px;position:relative;line-height:70px}.main-nav a.active{color:var(--blue)}.main-nav a.active:after{content:'';position:absolute;bottom:17px;height:2px;width:22px;left:calc(50% - 11px);background:var(--blue)}.entry-btn,.button{display:inline-flex;justify-content:center;align-items:center;height:42px;min-width:100px;border-radius:999px;background:#5C7CFA;color:white;padding:0 20px;font-weight:bold;white-space:nowrap}.entry-btn:hover,.button:hover{background:#7390FF;color:white}.subnav{background:var(--sub)}.subnav-inner{height:44px;display:flex;align-items:center;gap:26px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.subnav a{font-size:13px;color:#A7AFBA}.subnav a:hover{color:#8ED8FF}.menu-toggle{display:none}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:8px;top:8px;z-index:20000;background:#fff;color:#000;padding:8px}.site-main{min-height:65vh}.section{padding:35px 0;border-bottom:1px solid 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h2{font-size:19px;color:var(--white);margin:0 0 8px}.faq-item p{margin:0}.responsibility{border-left:3px solid #6EA8FF;background:#12161C;padding:20px;border-radius:4px}.site-footer{background:#050608;padding:44px 0 0}.footer-cols{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:30px}.footer-cols h2{font-size:17px;color:var(--white)}.footer-cols a:not(.footer-brand){display:block;font-size:14px;padding:4px 0}.footer-cols p{font-size:13px;color:#AAB4C3}.footer-logo{max-height:38px;max-width:140px;object-fit:contain}.footer-bottom{display:flex;gap:20px;justify-content:space-between;align-items:center;padding-top:24px;padding-bottom:24px;margin-top:28px;border-top:1px solid var(--border);font-size:12px;color:#9EA8B4}.mobile-drawer,.drawer-mask,.bottom-nav{display:none}.back-top{position:fixed;right:18px;bottom:24px;border:1px solid var(--border);border-radius:50%;background:#171C23;color:white;width:40px;height:40px;z-index:120;opacity:0;pointer-events:none}.back-top.show{opacity:1;pointer-events:auto}
@media(max-width:980px){.container{padding-left:20px;padding-right:20px}.nav-wrap{height:59px;justify-content:space-between;gap:8px}.main-nav{display:none}.menu-toggle{display:block;border:0;background:none;color:#F5F7FA;font-size:23px;padding:2px 6px}.brand{min-width:0;flex:1;justify-content:center}.logo-img{height:29px;max-width:105px}.entry-btn{height:36px;min-width:76px;padding:0 13px;font-size:13px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100dvh;background:#0D1015;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;overflow-y:auto;padding:18px}.mobile-drawer.is-open{transform:translateX(0)}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.65);z-index:11000;opacity:0;pointer-events:none}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}body.drawer-open{overflow:hidden}.drawer-top{display:flex;justify-content:space-between;align-items:center;color:white}.drawer-close{font-size:30px;color:white;background:none;border:0}.drawer-group{padding:15px 0;border-bottom:1px solid var(--border)}.drawer-group h2{font-size:15px;color:#8ED8FF;margin:0 0 10px}.drawer-group a{display:block;padding:6px;font-size:14px}.cards.four{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:minmax(0,1fr)}.sidebar{position:static}.bottom-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;background:#0D1015;z-index:1000;border-top:1px solid var(--border);height:61px}.bottom-nav a{display:flex;align-items:center;justify-content:center;font-size:14px}.site-footer{padding-bottom:61px}.back-top{bottom:79px}.footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){body{font-size:15px}.container{padding-left:16px;padding-right:16px}.hero{grid-template-columns:1fr;gap:16px;padding:26px 0}.hero>.media{grid-row:1}.hero h1{font-size:28px}.hero .media{max-height:210px}.inner-hero h1{font-size:26px}.section{padding:27px 0}.section-title{font-size:21px}.cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.cards.two,.text-split,.feature-row,.feature-row.reverse{grid-template-columns:1fr}.card{padding:13px}.card h3{font-size:16px}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.visual-item{padding:9px}.article-block h2{font-size:21px}.article-layout{padding-top:15px}.lead{font-size:16px}.footer-cols{gap:20px}.footer-bottom{display:block}.feature-row .media{max-width:100%}.media-device{max-width:200px}.cards.four{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:350px){.cards{grid-template-columns:1fr}.cards.four,.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.brand{max-width:104px}.logo-img{max-width:98px}.entry-btn{padding:0 10px}.nav-wrap{gap:5px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.mobile-drawer{transition:none}}

/* 第二版：首页与内页的专题布局，不修改原始品牌配色 */
.topic-intro{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:26px;align-items:center;padding:38px 0 28px}.topic-intro .media{max-width:420px;justify-self:end}.topic-stack{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px;align-items:start}.topic-stack .side-index{position:sticky;top:130px}.topic-content{min-width:0}.topic-content .split-panel{margin-bottom:20px}.tagline{font-size:15px;color:#8ED8FF;letter-spacing:.08em}.card a{text-decoration:none}.note-strip{padding:20px 24px;background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:14px}.index-columns{columns:3;column-gap:18px}.index-columns a{display:block;padding:13px 16px;margin-bottom:12px;background:#171C23;border-radius:10px;break-inside:avoid}.home-tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.home-tiles .card{min-width:0}.media-natural img{height:auto;max-height:unset;max-width:100%;object-fit:contain}.square-gallery{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}.square-gallery .media{aspect-ratio:1/1}.square-gallery article{min-width:0}.square-gallery h3{font-size:16px}.home-banner{max-width:1080px;margin:auto}.home-banner .media img{width:100%;height:auto;max-height:none}.topic-content p{line-height:1.9}.article-meta{color:#9098A3;font-size:14px}.image-focus{max-width:550px;margin:20px auto}.faq-row{padding:16px 0;border-bottom:1px solid rgba(255,255,255,.09)}@media(max-width:980px){.topic-stack{grid-template-columns:1fr}.topic-stack .side-index{position:static}.square-gallery{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:640px){.topic-intro{grid-template-columns:1fr;padding:22px 0}.topic-intro .media{grid-row:1;justify-self:center;width:100%}.home-tiles{grid-template-columns:repeat(2,minmax(0,1fr))}.square-gallery{grid-template-columns:repeat(2,minmax(0,1fr))}.index-columns{columns:1}}@media(max-width:350px){.home-tiles{grid-template-columns:1fr}}

/* 第三版：资讯分栏、专题导航、档案网格 */
.portal-hero{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center;padding:34px 0}.portal-hero h1{line-height:1.25}.portal-hero .media{width:100%}.reading-ribbon{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.reading-ribbon a{padding:18px;background:#171C23;border:1px solid rgba(255,255,255,.09);border-radius:12px}.reading-ribbon strong,.reading-ribbon span{display:block}.reading-ribbon span{font-size:13px;color:#9098A3}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:28px;align-items:start}.article-layout article{min-width:0}.article-layout aside{position:sticky;top:135px}.article-layout section{margin:0 0 24px;padding:24px;border-radius:14px;background:#171C23}.article-layout section p{line-height:1.95}.article-layout aside a{display:block;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.09)}.mini-eyebrow{text-transform:uppercase;letter-spacing:.12em;color:#8ED8FF;font-size:13px}.feature-entries{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.feature-entries article{background:#171C23;border:1px solid rgba(255,255,255,.09);padding:20px;border-radius:14px}.feature-entries h3{margin:0 0 10px;font-size:18px}.feature-entries p{margin:0 0 16px}.visual-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.visual-grid figure{margin:0;padding:12px;background:#171C23;border-radius:12px;min-width:0}.visual-grid figcaption{font-size:13px;margin-top:10px}.visual-grid .media{aspect-ratio:1/1}.visual-grid .media img{object-fit:contain}.anchor-note{padding:22px;border-radius:12px;background:#12161C;border:1px solid rgba(255,255,255,.09)}.chapter-head{margin:0 0 20px}.feature-image{max-width:620px;margin:20px auto}.feature-image .media img{height:auto;max-height:460px}.banner-zone .media img{width:100%;height:auto}.extra-reading{margin-top:30px}.extra-reading a{display:inline-block;padding:10px 18px;background:#171C23;border-radius:10px;margin:5px}.faq-item{padding:18px 22px;background:#171C23;border-radius:12px;margin-bottom:12px}@media(max-width:980px){.article-layout{grid-template-columns:1fr}.article-layout aside{position:static}.reading-ribbon{grid-template-columns:repeat(2,minmax(0,1fr))}.visual-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:700px){.portal-hero{grid-template-columns:1fr}.portal-hero .media{grid-row:1}.feature-entries{grid-template-columns:repeat(2,minmax(0,1fr))}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:360px){.feature-entries{grid-template-columns:1fr}.reading-ribbon{grid-template-columns:1fr}}