:root{--bg:#000;--deep:#050505;--panel:#0b0b0b;--panel2:#121212;--hover:#1a1a1a;--text:#ddd;--muted:#a5a5a5;--dim:#727272;--white:#fff;--title:#f7f7f7;--silver:#c7c7c7;--border:rgba(255,255,255,.12);--border-strong:rgba(255,255,255,.4);--shadow:0 18px 46px rgba(0,0,0,.48);--glow:0 12px 34px rgba(255,255,255,.08);--shell:min(1320px,calc(100% - 48px));--header-offset:140px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.72;overflow-x:hidden}body.panel-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}img{display:block;max-width:100%;height:auto}.shell{width:var(--shell);margin-inline:auto}.skip-link{position:fixed;left:12px;top:12px;z-index:9999;background:#fff;color:#000;padding:10px 14px;transform:translateY(-160%)}.skip-link:focus{transform:none}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid #fff;outline-offset:3px}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(0,0,0,.98);border-bottom:1px solid var(--border)}.utility-bar{height:34px;border-bottom:1px solid var(--border);background:#000;font-size:12px;color:var(--muted)}.utility-inner{height:100%;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px}.utility-center{display:flex;gap:22px}.utility-actions{display:flex;justify-content:flex-end;gap:16px;align-items:center}.utility-bar a:hover,.text-button:hover{color:#fff}.text-button{border:0;background:none;color:var(--muted);padding:0;cursor:pointer}.brand-bar{background:#050505}.brand-inner{position:relative;min-height:72px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.brand-side{display:flex;align-items:center;gap:16px;min-width:0}.brand-side-right{justify-content:flex-end}.channel-name{font-size:12px;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:260px}.icon-button{min-height:44px;border:1px solid var(--border);background:#0b0b0b;color:#fff;padding:0 14px;cursor:pointer}.icon-button:hover{background:#1a1a1a}.brand-logo{display:flex;align-items:center;justify-content:center;flex-direction:column;min-width:160px}.brand-logo img,.footer-logo img,.drawer-logo img{max-height:48px;width:auto}.brand-cn{font-size:26px;font-weight:900;letter-spacing:.18em;color:#fff;line-height:1}.brand-en{font-size:9px;letter-spacing:.24em;color:var(--muted);margin-top:5px}.nav-link{font-size:13px;color:var(--silver)}.compact-cta{min-height:44px;display:inline-flex;align-items:center;padding:0 18px;background:#fff;color:#000;font-weight:700}.channel-bar{border-top:1px solid var(--border);background:#000}.channel-scroll{height:44px;display:flex;align-items:stretch;gap:2px;white-space:nowrap}.channel-scroll>a,.more-menu>summary{display:flex;align-items:center;padding:0 14px;color:var(--muted);font-size:13px;cursor:pointer}.channel-scroll>a:hover,.more-menu>summary:hover{color:#fff}.channel-scroll>a.is-active{color:#fff;box-shadow:inset 0 -2px 0 #fff}.more-menu{position:relative;margin-left:auto}.more-menu summary{list-style:none}.more-menu summary::-webkit-details-marker{display:none}.more-menu-panel{position:absolute;right:0;top:calc(100% + 1px);width:180px;padding:8px;background:#0b0b0b;border:1px solid var(--border);box-shadow:var(--shadow)}.more-menu-panel a{display:block;padding:10px 12px;color:var(--muted)}.more-menu-panel a:hover{background:#1a1a1a;color:#fff}
.site-main{min-height:60vh}.hero{padding:56px 0 42px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(340px,.8fr);gap:44px;align-items:stretch}.hero-media,.image-frame{background:#0b0b0b;border:1px solid var(--border);min-height:420px;overflow:hidden}.hero-media img,.image-frame img{width:100%;height:100%;object-fit:cover;filter:grayscale(100%);opacity:.86}.hero-copy{display:flex;flex-direction:column;justify-content:center}.eyebrow{margin:0 0 12px;color:var(--silver);font-size:12px;letter-spacing:.18em;text-transform:uppercase}.hero h1,.page-hero h1{font-size:clamp(42px,6vw,82px);line-height:1.03;letter-spacing:.015em;margin:0;color:var(--title);font-weight:900}.hero-lead,.page-lead{font-size:17px;color:var(--muted);max-width:760px;margin:22px 0 0}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.button{min-height:46px;display:inline-flex;align-items:center;justify-content:center;padding:0 20px;border:1px solid var(--border-strong);font-weight:700;font-size:14px}.button-primary{background:#fff;color:#000;border-color:#fff}.button-secondary{background:transparent;color:#fff}.button:hover{transform:translateY(-1px)}.hero-briefs{margin-top:30px;border-top:1px solid var(--border)}.hero-briefs a{display:grid;grid-template-columns:95px 1fr;gap:18px;padding:15px 0;border-bottom:1px solid var(--border)}.hero-briefs strong{font-size:13px;color:#fff}.hero-briefs span{font-size:13px;color:var(--muted)}
.section{padding:70px 0;border-top:1px solid var(--border)}.section-head{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:end;margin-bottom:28px}.section-head h2{font-size:clamp(28px,4vw,52px);line-height:1.12;margin:0;color:var(--title);letter-spacing:.02em}.section-head p{max-width:620px;color:var(--muted);margin:10px 0 0}.section-kicker{display:block;color:var(--dim);font-size:11px;letter-spacing:.18em;margin-bottom:8px}.section-link{font-size:13px;color:#fff;border-bottom:1px solid #fff;padding-bottom:3px}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:#0b0b0b;border:1px solid var(--border);padding:24px;min-width:0}.card:hover{border-color:var(--border-strong)}.card .num{font-size:11px;color:var(--dim);letter-spacing:.15em}.card h3{margin:10px 0 8px;color:#fff;font-size:20px;line-height:1.35}.card p{margin:0;color:var(--muted);font-size:14px}.card-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;color:var(--dim);font-size:11px}.card-link{display:inline-block;margin-top:20px;color:#fff;font-size:13px;border-bottom:1px solid var(--border-strong)}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.72fr);gap:30px;align-items:start}.feature-panel{padding:34px;background:#ededed;color:#111}.feature-panel .section-kicker{color:#555}.feature-panel h2,.feature-panel h3{color:#000;margin-top:0}.feature-panel p{color:#333}.feature-panel .button-secondary{color:#000;border-color:rgba(0,0,0,.35)}.feature-panel .button-primary{background:#000;color:#fff;border-color:#000}.number-list{border-top:1px solid var(--border)}.number-list article,.number-list a.item{display:grid;grid-template-columns:70px minmax(0,1fr) auto;gap:20px;align-items:start;padding:22px 0;border-bottom:1px solid var(--border)}.number-list .index{color:var(--dim);font-size:12px;letter-spacing:.15em}.number-list h3{margin:0 0 6px;color:#fff}.number-list p{margin:0;color:var(--muted);font-size:14px}.number-list .arrow{color:var(--silver)}
.page-hero{padding:72px 0 46px}.page-hero .breadcrumbs{font-size:12px;color:var(--dim);margin-bottom:24px}.page-hero .breadcrumbs a{color:var(--muted)}.page-hero h1{font-size:clamp(44px,7vw,88px);max-width:1000px}.page-hero .page-lead{max-width:850px}.page-hero-media{margin-top:36px;min-height:300px;max-height:560px;overflow:hidden;border:1px solid var(--border);background:#0b0b0b}.page-hero-media img{width:100%;height:100%;object-fit:cover;filter:grayscale(100%);opacity:.88}.prose{max-width:880px}.prose h2{font-size:32px;color:#fff;margin:48px 0 14px;line-height:1.2}.prose h3{font-size:20px;color:#fff;margin:28px 0 10px}.prose p{color:var(--text);margin:0 0 18px}.prose ul{padding-left:20px;color:var(--text)}.prose li+li{margin-top:10px}.notice{border-left:2px solid #fff;background:#0b0b0b;padding:18px 20px;color:var(--muted);margin:24px 0}.quote{font-size:clamp(25px,4vw,44px);line-height:1.35;color:#fff;margin:0;padding:36px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.tag{border:1px solid var(--border);padding:6px 10px;font-size:12px;color:var(--muted)}.table-like{border-top:1px solid var(--border)}.table-row{display:grid;grid-template-columns:180px 1fr;gap:20px;padding:18px 0;border-bottom:1px solid var(--border)}.table-row strong{color:#fff}.table-row span{color:var(--muted)}.faq-list details{border-top:1px solid var(--border)}.faq-list details:last-child{border-bottom:1px solid var(--border)}.faq-list summary{cursor:pointer;padding:20px 36px 20px 0;color:#fff;font-weight:700;position:relative}.faq-list summary::after{content:'+';position:absolute;right:4px}.faq-list details[open] summary::after{content:'−'}.faq-list details p{margin:0 0 22px;color:var(--muted);max-width:920px}.timeline{display:grid;gap:1px;background:var(--border);border:1px solid var(--border)}.timeline article{display:grid;grid-template-columns:170px 1fr;gap:24px;background:#0b0b0b;padding:22px}.timeline strong{color:#fff}.timeline p{margin:0;color:var(--muted)}
.site-footer{border-top:1px solid var(--border);padding:58px 0 calc(30px + env(safe-area-inset-bottom));background:#000}.footer-top{display:grid;grid-template-columns:minmax(230px,.65fr) minmax(0,1.35fr);gap:56px}.footer-brand p{color:var(--muted);font-size:13px;max-width:330px}.footer-logo{display:inline-flex;flex-direction:column;margin-bottom:18px}.footer-groups{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}.footer-groups h2{font-size:13px;color:#fff;margin:0 0 14px}.footer-groups a{display:block;color:var(--muted);font-size:13px;padding:4px 0}.footer-groups a:hover{color:#fff}.footer-notice{margin-top:36px;padding-top:24px;border-top:1px solid var(--border)}.footer-notice p{color:var(--dim);font-size:12px;max-width:980px}.footer-bottom{display:flex;gap:18px;flex-wrap:wrap;padding-top:22px;color:var(--dim);font-size:12px}.footer-bottom span{margin-right:auto}
.site-overlay{position:fixed;inset:0;background:rgba(0,0,0,.72);z-index:2000;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .22s ease,visibility .22s ease}.site-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.site-drawer{position:fixed;inset:0 auto 0 0;width:min(520px,90vw);background:#050505;z-index:2100;transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .28s ease,visibility .28s ease;overflow-y:auto}.site-drawer.is-open{transform:none;visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;z-index:2;display:flex;justify-content:space-between;align-items:center;padding:18px 22px;background:#050505;border-bottom:1px solid var(--border)}.drawer-logo{display:flex;flex-direction:column}.drawer-logo span{font-size:9px;letter-spacing:.18em;color:var(--muted)}.drawer-body{padding:18px 22px 46px}.drawer-body section{padding:18px 0;border-bottom:1px solid var(--border)}.drawer-body h2{font-size:12px;color:var(--dim);letter-spacing:.15em;text-transform:uppercase}.drawer-body a{display:grid;grid-template-columns:105px 1fr;gap:16px;padding:11px 0}.drawer-body strong{color:#fff}.drawer-body span{color:var(--muted);font-size:12px}.search-panel{position:fixed;inset:0;background:#000;z-index:2200;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .22s ease,visibility .22s ease;overflow-y:auto}.search-panel.is-open{opacity:1;visibility:visible;pointer-events:auto}.search-shell{padding-top:42px;padding-bottom:80px}.search-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border);padding-bottom:18px}.search-head p{font-size:12px;color:var(--muted);letter-spacing:.16em}.search-label{display:block;font-size:clamp(28px,5vw,64px);line-height:1.15;color:#fff;font-weight:800;margin:58px 0 18px}.search-input{width:100%;border:0;border-bottom:1px solid var(--border-strong);background:transparent;color:#fff;font-size:clamp(24px,4vw,48px);padding:14px 0;outline:none}.search-columns{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:48px}.search-columns h2{font-size:13px;color:var(--dim)}.search-links{display:flex;flex-wrap:wrap;gap:9px}.search-links a{border:1px solid var(--border);padding:10px 13px;color:var(--muted)}.search-links a:hover{color:#fff;border-color:var(--border-strong)}.search-empty{color:var(--muted);margin-top:30px}.mobile-nav{display:none}
@media (max-width:980px){:root{--shell:min(100% - 32px,1320px)}.utility-inner{grid-template-columns:1fr auto}.utility-center{display:none}.utility-help{display:none}.channel-name{display:none}.hero-grid,.split,.footer-top{grid-template-columns:1fr}.hero-copy{order:-1}.hero-media{min-height:330px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-groups{grid-template-columns:repeat(2,minmax(0,1fr))}.brand-logo{min-width:130px}.desktop-label{display:none}}
@media (max-width:680px){:root{--shell:calc(100% - 28px)}body{padding-bottom:calc(58px + env(safe-area-inset-bottom))}.utility-brand{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.utility-actions{gap:12px}.utility-app{display:none}.brand-inner{min-height:62px;grid-template-columns:1fr auto 1fr}.brand-cn{font-size:20px}.brand-en{font-size:7px}.brand-logo img{max-height:38px}.desktop-only{display:none}.compact-cta{min-height:44px;padding:0 13px;font-size:12px}.channel-scroll{overflow-x:auto;scrollbar-width:none}.channel-scroll::-webkit-scrollbar{display:none}.channel-scroll>a,.more-menu>summary{padding:0 12px}.more-menu{margin-left:0;position:static}.more-menu-panel{position:fixed;top:142px;right:14px;width:180px;z-index:1100}.hero{padding-top:38px}.hero-grid{gap:26px}.hero h1,.page-hero h1{font-size:clamp(39px,12vw,62px)}.hero-media{min-height:260px}.hero-briefs a{grid-template-columns:80px 1fr}.section{padding:52px 0}.section-head{grid-template-columns:1fr}.section-link{justify-self:start}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.card{padding:20px}.number-list article,.number-list a.item{grid-template-columns:44px 1fr}.number-list .arrow{display:none}.page-hero{padding:48px 0 34px}.page-hero-media{min-height:220px}.table-row{grid-template-columns:1fr;gap:5px}.timeline article{grid-template-columns:1fr;gap:8px}.footer-groups{grid-template-columns:1fr 1fr}.footer-bottom span{width:100%}.search-columns{grid-template-columns:1fr}.mobile-nav{position:fixed;z-index:1800;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#050505;border-top:1px solid var(--border)}.mobile-nav a{display:flex;align-items:center;justify-content:center;min-height:48px;color:var(--dim);font-size:12px}.mobile-nav a.is-active{color:#fff;background:#121212}.site-drawer.is-open~.mobile-nav,.search-panel.is-open~.mobile-nav{visibility:hidden}.drawer-body a{grid-template-columns:92px 1fr;gap:12px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.site-overlay,.site-drawer,.search-panel,.button{transition:none!important}}