:root{--bg:#050505;--deep:#0a0a0a;--card:#111;--hover:#191919;--light:#efefef;--title:#fafafa;--text:#d8d8d8;--muted:#a3a3a3;--dark:#151515;--border:rgba(255,255,255,.14);--border-hi:rgba(255,255,255,.42);--max:1320px;--header:102px;--z-header:40;--z-overlay:70;--z-drawer:80;--z-search:75}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.82;overflow-x:hidden}body.is-locked{overflow:hidden}img{display:block;max-width:100%;height:auto}a,button{position:relative;z-index:2;pointer-events:auto;touch-action:manipulation}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:12px;top:-60px;background:#fff;color:#000;padding:10px 14px;z-index:999}.skip-link:focus{top:12px}.site-header{position:fixed;inset:0 0 auto 0;height:var(--header);z-index:var(--z-header);background:#050505}.brand-rail{height:68px;padding:0 max(16px,calc((100vw - var(--max))/2));display:flex;align-items:center;gap:28px;border-bottom:1px solid rgba(255,255,255,.24);background:linear-gradient(90deg,#050505,#171717)}.brand{display:flex;align-items:center;gap:10px;min-width:170px}.brand-logo{max-height:36px;width:auto}.brand-fallback{display:flex;flex-direction:column;line-height:1.05}.brand-fallback strong{font-size:20px}.brand-fallback small{font-size:9px;letter-spacing:.18em;color:var(--muted)}.brand:has(.brand-logo:not(.media-placeholder)) .brand-fallback{display:none}.desktop-main-nav{display:flex;align-items:stretch;height:100%;gap:8px;margin-right:auto}.desktop-main-nav a{display:flex;align-items:center;padding:0 14px;color:#c8c8c8}.desktop-main-nav a.active,.desktop-main-nav a:hover{background:#ededed;color:#111}.header-actions{display:flex;align-items:center;gap:8px}.icon-button,.close-button,.app-link{min-height:44px;border:1px solid var(--border);background:transparent;color:#eee;padding:0 14px;cursor:pointer}.icon-button:hover,.close-button:hover,.app-link:hover{border-color:var(--border-hi);background:#1b1b1b}.channel-rail{height:34px;display:flex;justify-content:center;align-items:center;gap:22px;border-bottom:1px solid var(--border);background:#0b0b0b;font-size:13px}.channel-rail a{color:#aaa}.channel-rail a.active,.channel-rail a:hover{color:#fff}.rail-line{width:54px;height:1px;background:#777}.site-main{padding-top:var(--header);min-height:70vh}.wrap{width:min(var(--max),calc(100% - 56px));margin:0 auto}.section{padding:72px 0;border-bottom:1px solid var(--border)}.section.light{background:var(--light);color:var(--dark)}.eyebrow{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}.light .eyebrow{color:#626262}h1,h2,h3{line-height:1.18;color:var(--title);margin:0 0 18px}h1{font-size:clamp(30px,5vw,64px);max-width:900px}h2{font-size:clamp(24px,3.3vw,38px)}h3{font-size:20px}.light h1,.light h2,.light h3{color:#111}.lead{font-size:18px;max-width:860px;color:#cfcfcf}.light .lead{color:#333}.hero-media{padding-top:28px}.media-frame{display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(145deg,#050505,#202020);border:1px solid var(--border)}.media-frame img{width:100%;height:100%;object-fit:contain;object-position:center}.media-placeholder{min-height:220px;display:flex;align-items:center;justify-content:center;background:linear-gradient(145deg,#050505,#202020);color:#cfcfcf;border:1px solid var(--border)}.hero-frame{max-height:520px;min-height:260px}.hero-frame img{max-height:520px}.hero-copy{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:end;padding:36px 0 10px}.hero-copy p{max-width:820px;margin:0}.text-links{display:flex;gap:14px;flex-wrap:wrap}.text-links a,.inline-link{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border:1px solid var(--border-hi)}.light .text-links a,.light .inline-link{border-color:#888}.number-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border)}.number-card{background:#0b0b0b;padding:28px}.number{font-size:12px;color:#888;letter-spacing:.15em}.number-card p{margin-bottom:0;color:#bdbdbd}.split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:40px;align-items:center}.split.reverse{grid-template-columns:minmax(320px,.9fr) minmax(0,1.1fr)}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:linear-gradient(160deg,#1b1b1b 0%,#0d0d0d 70%,#050505 100%);border:1px solid var(--border);padding:22px;border-radius:10px}.card p:last-child{margin-bottom:0}.card .media-frame{margin:-22px -22px 22px}.light .card{background:#fff;border-color:#cfcfcf;color:#222}.timeline{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}.timeline article{border-top:2px solid #aaa;padding:16px 10px 0}.timeline strong{display:block;margin-bottom:8px}.status-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.status{border:1px solid var(--border);padding:20px;background:#101010}.article-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}.article-grid article{border-top:1px solid #777;padding-top:18px}.article-grid .opinion{font-size:12px;letter-spacing:.1em;color:#bdbdbd}.detail-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.detail-list article,.knowledge-card{padding:22px;border:1px solid var(--border);background:#0d0d0d}.feature-list{display:grid;gap:14px}.feature-list li{padding-bottom:14px;border-bottom:1px solid var(--border)}.table-list{display:grid;grid-template-columns:180px 1fr;border-top:1px solid var(--border)}.table-list dt,.table-list dd{margin:0;padding:14px;border-bottom:1px solid var(--border)}.table-list dt{color:#999}.terms{counter-reset:item;display:grid;gap:14px}.terms article{counter-increment:item;padding:22px;border:1px solid var(--border);background:#0e0e0e}.terms article h2:before{content:counter(item,decimal-leading-zero) " / ";color:#777}.faq{display:grid;gap:14px}.faq article{border:1px solid var(--border);padding:22px}.faq h2{font-size:20px}.channel-drawer{position:fixed;right:0;top:0;width:min(92vw,380px);height:100dvh;overflow-y:auto;z-index:var(--z-drawer);padding:18px;background:linear-gradient(145deg,#050505,#1c1c1c);border-left:1px solid var(--border-hi);visibility:hidden;opacity:0;pointer-events:none;transform:translateX(24px);transition:.24s ease}.channel-drawer.open{visibility:visible;opacity:1;pointer-events:auto;transform:none}.drawer-head{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--border)}.drawer-head span{display:block;font-size:12px;color:#999}.drawer-group{padding:18px 0;border-bottom:1px solid var(--border)}.drawer-group h2{font-size:14px;color:#999}.drawer-group a{display:block;padding:10px 0}.drawer-group a strong,.drawer-group a span{display:block}.drawer-group a span{font-size:12px;color:#989898}.overlay{position:fixed;inset:0;background:rgba(0,0,0,.72);z-index:var(--z-overlay)}.search-panel{position:fixed;top:68px;left:0;right:0;z-index:var(--z-search);background:#101010;border-bottom:1px solid var(--border-hi);padding:24px}.search-inner{width:min(var(--max),calc(100% - 56px));margin:auto}.search-top{display:flex;justify-content:space-between;align-items:center;gap:20px}.search-panel input{width:100%;margin:18px 0;padding:14px;background:#050505;color:#fff;border:1px solid var(--border-hi)}.search-links{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.search-links a{border:1px solid var(--border);padding:12px}.search-links span{display:block;color:#888;font-size:11px}.site-footer{background:linear-gradient(#080808,#161616);border-top:1px solid rgba(255,255,255,.32);padding:54px max(28px,calc((100vw - var(--max))/2)) 24px}.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:32px}.footer-grid h2{font-size:14px;color:#9c9c9c}.footer-grid>div>a:not(.brand){display:block;margin:8px 0;color:#d0d0d0}.footer-brand p{max-width:400px;color:#aaa}.footer-note{display:flex;justify-content:space-between;gap:30px;padding-top:28px;margin-top:32px;border-top:1px solid var(--border);font-size:12px;color:#8f8f8f}.mobile-bottom-nav{display:none}.app-visual{max-height:460px}.app-visual img{max-height:460px}.notice{padding:18px;border-left:3px solid #aaa;background:#101010}.light .notice{background:#fff;border-color:#444}.pills{display:flex;gap:10px;flex-wrap:wrap}.pills span{border:1px solid var(--border);padding:7px 10px;font-size:13px}.index-list{display:grid;gap:10px}.index-list a{display:grid;grid-template-columns:90px 1fr auto;gap:14px;padding:15px 0;border-bottom:1px solid var(--border);align-items:center}.index-list small{color:#8d8d8d}.quote{font-size:clamp(22px,3vw,34px);line-height:1.45;color:#f4f4f4;border-left:1px solid #aaa;padding-left:24px}.light .quote{color:#111}
@media(max-width:980px){.desktop-main-nav,.channel-rail,.app-link{display:none}:root{--header:68px}.brand-rail{padding:0 16px}.brand{min-width:0;margin-right:auto}.menu-button{font-size:0;padding:0;width:46px}.menu-button:after{content:'菜单';font-size:14px}.wrap{width:min(var(--max),calc(100% - 32px))}.split,.split.reverse,.hero-copy{grid-template-columns:1fr}.card-grid{grid-template-columns:1fr 1fr}.number-grid{grid-template-columns:1fr 1fr}.timeline{grid-template-columns:repeat(3,1fr)}.status-grid{grid-template-columns:1fr 1fr}.search-panel{top:68px}.search-inner{width:100%}.search-links{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}.footer-grid>div:nth-child(4),.footer-grid>div:nth-child(5){margin-top:10px}.mobile-bottom-nav{display:grid;position:fixed;left:0;right:0;bottom:0;grid-template-columns:repeat(5,1fr);min-height:calc(56px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:linear-gradient(#090909,#181818);border-top:1px solid var(--border-hi);z-index:35}.mobile-bottom-nav a{min-height:56px;display:flex;align-items:center;justify-content:center;font-size:13px;color:#bbb}.mobile-bottom-nav a.active{background:#fff;color:#000}.site-footer{padding-bottom:calc(86px + env(safe-area-inset-bottom))}}
@media(max-width:680px){.section{padding:52px 0}.hero-media{padding-top:16px}.hero-frame{max-height:320px;min-height:180px}.hero-frame img{max-height:320px}.number-grid,.card-grid,.article-grid,.detail-list,.status-grid{grid-template-columns:1fr}.timeline{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-note{display:block}.search-links{grid-template-columns:1fr 1fr}.header-actions{gap:4px}.icon-button{padding:0 11px}.index-list a{grid-template-columns:60px 1fr}.index-list a span:last-child{display:none}.table-list{grid-template-columns:1fr}.table-list dt{padding-bottom:0;border-bottom:0}.table-list dd{padding-top:6px}.app-visual{max-height:380px}.app-visual img{max-height:380px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid #fff;outline-offset:3px}