:root{--black:#000;--deep:#050505;--panel:#0b0b0b;--panel2:#121212;--hover:#1a1a1a;--title:#f7f7f7;--text:#ddd;--muted:#a5a5a5;--dim:#727272;--line:rgba(255,255,255,.12);--line-strong:rgba(255,255,255,.4);--shadow:0 18px 46px rgba(0,0,0,.48);--glow:0 12px 34px rgba(255,255,255,.08);--max:1320px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#000;color:var(--text);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.75;overflow-x:hidden}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}.skip-link{position:fixed;left:16px;top:-80px;z-index:500;background:#fff;color:#000;padding:10px 16px}.skip-link:focus{top:12px}.shell{width:min(calc(100% - 40px),var(--max));margin:0 auto}
.site-header{position:sticky;top:0;z-index:100;background:rgba(0,0,0,.96);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.top-strip{border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}.top-strip__inner{width:min(calc(100% - 40px),var(--max));height:34px;margin:auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}.top-strip__brand{margin:0}.top-strip__links,.top-strip__actions{display:flex;align-items:center;gap:18px}.top-strip__actions{justify-content:flex-end}.text-button{background:none;border:0;padding:0;cursor:pointer}.brand-nav{height:72px;width:min(calc(100% - 40px),var(--max));margin:auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:28px}.brand-nav__side{display:flex;align-items:center;gap:18px;min-width:0}.brand-nav__side--right{justify-content:flex-end}.menu-trigger,.more-trigger,.icon-button{background:transparent;border:1px solid var(--line);cursor:pointer}.menu-trigger{height:44px;padding:0 14px;display:inline-flex;align-items:center;gap:9px}.menu-trigger:hover,.more-trigger:hover,.icon-button:hover{background:var(--hover);border-color:var(--line-strong)}.current-channel{font-size:12px;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:240px}.brand-mark{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:160px;line-height:1}.brand-mark img{display:block;max-width:158px;max-height:50px;width:auto;height:auto}.brand-mark__cn{font-size:26px;font-weight:900;letter-spacing:.26em;margin-left:.26em;color:#fff}.brand-mark__en{margin-top:8px;font-size:9px;letter-spacing:.34em;color:var(--muted)}.plain-link{font-size:13px}.button{min-height:46px;padding:0 22px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-strong);font-weight:700;letter-spacing:.04em;white-space:nowrap;transition:.2s}.button:hover{transform:translateY(-1px);box-shadow:var(--glow)}.button--light{background:#fff;color:#000;border-color:#fff}.button--ghost{background:transparent;color:#fff}.button--compact{min-height:42px;padding:0 17px;font-size:13px}.channel-row{height:44px;border-top:1px solid var(--line);width:min(calc(100% - 40px),var(--max));margin:auto;display:flex;align-items:stretch}.channel-nav{display:flex;align-items:stretch;flex:1;min-width:0;overflow:hidden}.channel-nav a{display:flex;align-items:center;padding:0 16px;font-size:13px;color:var(--muted);white-space:nowrap;border-bottom:2px solid transparent}.channel-nav a:hover,.channel-nav a.is-active{color:#fff;border-bottom-color:#fff}.more-wrap{position:relative;flex:0 0 auto}.more-trigger{height:100%;padding:0 15px;border-top:0;border-bottom:0}.more-menu{position:absolute;right:0;top:calc(100% + 1px);width:190px;padding:8px;background:var(--panel2);border:1px solid var(--line);box-shadow:var(--shadow)}.more-menu a{display:block;padding:10px 12px;font-size:13px;color:var(--muted)}.more-menu a:hover{background:var(--hover);color:#fff}
.site-main{min-height:60vh}.section{padding:86px 0;border-bottom:1px solid var(--line)}.section--tight{padding:58px 0}.section--soft{background:var(--deep)}.eyebrow{margin:0 0 12px;color:var(--muted);font-size:11px;letter-spacing:.28em;text-transform:uppercase}.display-title{margin:0;color:var(--title);font-size:clamp(38px,6vw,88px);line-height:1.02;letter-spacing:-.04em}.section-title{margin:0;color:var(--title);font-size:clamp(28px,4vw,50px);line-height:1.18;letter-spacing:-.025em}.lead{max-width:820px;margin:20px 0 0;font-size:clamp(16px,2vw,20px);color:var(--muted)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}.section-head__copy{max-width:780px}.section-link{font-size:13px;border-bottom:1px solid var(--line-strong);padding-bottom:4px}.hero{padding:54px 0 72px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(320px,.75fr);gap:40px;align-items:stretch}.hero-visual{min-height:560px;position:relative;background:linear-gradient(145deg,#1a1a1a,#050505);border:1px solid var(--line);overflow:hidden}.hero-visual img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.04);display:block}.visual-placeholder{height:100%;min-height:inherit;display:flex;flex-direction:column;justify-content:flex-end;padding:38px;background:radial-gradient(circle at 68% 28%,rgba(255,255,255,.12),transparent 26%),linear-gradient(115deg,transparent 48%,rgba(255,255,255,.05) 48%,rgba(255,255,255,.05) 50%,transparent 50%)}.visual-placeholder strong{font-size:clamp(36px,6vw,76px);line-height:1;color:#fff;letter-spacing:.08em}.visual-placeholder span{margin-top:15px;color:var(--muted);letter-spacing:.2em}.hero-copy{display:flex;flex-direction:column;justify-content:center}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.micro-list{margin-top:40px;border-top:1px solid var(--line)}.micro-item{display:grid;grid-template-columns:100px 1fr auto;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}.micro-item strong{color:#fff}.micro-item p{margin:0;color:var(--muted);font-size:13px}.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:var(--panel);border:1px solid var(--line);padding:26px;min-height:100%;transition:.2s}.card:hover{background:var(--panel2);border-color:var(--line-strong);transform:translateY(-2px)}.card__index{font-size:11px;color:var(--dim);letter-spacing:.22em}.card h3{margin:10px 0;color:#fff;font-size:21px;line-height:1.35}.card p{margin:0;color:var(--muted);font-size:14px}.card__meta{display:flex;justify-content:space-between;gap:12px;margin-top:20px;padding-top:14px;border-top:1px solid var(--line);font-size:12px;color:var(--dim)}.card__meta a{color:#fff}.feature{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);border:1px solid var(--line);background:var(--panel)}.feature__visual{min-height:420px;background:#111}.feature__visual img{width:100%;height:100%;object-fit:cover;filter:grayscale(1)}.feature__copy{padding:42px;display:flex;flex-direction:column;justify-content:center}.feature__copy h3{margin:8px 0 16px;color:#fff;font-size:clamp(28px,4vw,48px);line-height:1.08}.feature__copy p{color:var(--muted)}.status{font-size:12px;color:var(--muted)}.text-list{border-top:1px solid var(--line)}.text-list article{display:grid;grid-template-columns:90px minmax(0,1fr) 130px;gap:26px;padding:26px 0;border-bottom:1px solid var(--line)}.text-list .num{color:var(--dim);font-size:12px;letter-spacing:.2em}.text-list h3{margin:0 0 8px;color:#fff;font-size:22px}.text-list p{margin:0;color:var(--muted)}.text-list aside{color:var(--dim);font-size:12px;text-align:right}.timeline{border-left:1px solid var(--line);margin-left:10px}.timeline article{position:relative;padding:0 0 34px 34px}.timeline article:before{content:"";position:absolute;left:-5px;top:8px;width:9px;height:9px;background:#fff;border-radius:50%}.timeline h3{margin:0 0 8px;color:#fff}.timeline p{margin:0;color:var(--muted)}
.faq-list{display:grid;gap:10px}.faq-list details{border:1px solid var(--line);background:var(--panel)}.faq-list summary{cursor:pointer;padding:18px 22px;color:#fff;font-weight:700;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"＋";float:right;color:var(--muted)}.faq-list details[open] summary:after{content:"－"}.faq-list details p{margin:0;padding:0 22px 20px;color:var(--muted)}.page-hero{padding:72px 0 54px;border-bottom:1px solid var(--line);background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.08),transparent 22%)}.page-hero__meta{margin-top:30px;display:flex;flex-wrap:wrap;gap:10px}.tag{display:inline-flex;align-items:center;min-height:32px;padding:0 12px;border:1px solid var(--line);font-size:12px;color:var(--muted)}.intro-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.6fr);gap:48px;align-items:start}.prose{color:var(--muted)}.prose p{margin:0 0 18px}.note-box{border:1px solid var(--line-strong);padding:26px;background:var(--panel)}.note-box h2{margin-top:0;color:#fff}.note-box p{margin-bottom:0;color:var(--muted)}.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line)}.topic-item{padding:30px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:220px}.topic-no{font-size:11px;color:var(--dim);letter-spacing:.22em}.topic-item h2{margin:10px 0 12px;color:#fff;font-size:24px}.topic-item p{margin:0;color:var(--muted)}.topic-item small{display:block;margin-top:18px;color:var(--dim)}.related-links{display:flex;flex-wrap:wrap;gap:10px}.related-links a{min-height:42px;padding:0 16px;border:1px solid var(--line);display:inline-flex;align-items:center}.related-links a:hover{background:#fff;color:#000}
.site-footer{padding:68px 0 110px}.footer-intro{display:grid;grid-template-columns:.9fr 1.6fr;gap:60px}.footer-brand p{max-width:420px;color:var(--muted)}.footer-logo{display:inline-flex;flex-direction:column}.footer-logo img{max-width:180px;height:auto}.footer-logo strong{font-size:30px;color:#fff;letter-spacing:.2em}.footer-logo span{font-size:10px;color:var(--muted);letter-spacing:.3em}.footer-groups{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}.footer-groups section{display:flex;flex-direction:column;gap:8px}.footer-groups h2{font-size:12px;color:#fff;letter-spacing:.16em}.footer-groups a{font-size:13px;color:var(--muted)}.footer-legal{margin-top:48px;padding-top:26px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:30px;color:var(--dim);font-size:12px}.footer-legal p:first-child{max-width:820px}.site-overlay{position:fixed;inset:0;z-index:180;background:rgba(0,0,0,.72);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.site-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.site-panel{position:fixed;left:0;top:0;bottom:0;width:min(520px,90vw);z-index:200;background:#050505;border-right:1px solid var(--line);transform:translateX(-103%);visibility:hidden;pointer-events:none;transition:.24s}.site-panel.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.panel-head{height:78px;padding:0 22px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.panel-brand{display:flex;align-items:center;gap:14px}.panel-brand img{max-width:72px;max-height:42px}.panel-brand span{display:flex;flex-direction:column}.panel-brand small{font-size:9px;color:var(--muted);letter-spacing:.2em}.icon-button{width:44px;height:44px;font-size:26px}.panel-scroll{height:calc(100% - 78px);overflow-y:auto;padding:24px}.panel-scroll section{margin-bottom:30px}.panel-scroll h2{font-size:11px;color:var(--dim);letter-spacing:.22em}.panel-scroll a{display:grid;grid-template-columns:120px 1fr;gap:14px;padding:15px 0;border-bottom:1px solid var(--line)}.panel-scroll strong{color:#fff}.panel-scroll span{color:var(--muted);font-size:13px}.search-panel{position:fixed;inset:0;z-index:210;background:#000;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-panel.is-open{opacity:1;visibility:visible;pointer-events:auto}.search-panel__head{height:86px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.search-panel__body{padding-top:56px}.search-panel__body>label{display:block;color:var(--muted);font-size:12px;letter-spacing:.15em}.search-input{width:100%;margin-top:12px;background:transparent;color:#fff;border:0;border-bottom:1px solid var(--line-strong);padding:16px 0;font-size:clamp(26px,5vw,58px);outline:0}.search-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:50px;margin-top:50px}.search-columns h2{font-size:12px;color:var(--dim);letter-spacing:.18em}.search-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.search-links a{padding:14px;border:1px solid var(--line);color:var(--muted)}.search-links a:hover{background:#fff;color:#000}.mobile-bottom{display:none}.app-showcase{display:grid;grid-template-columns:minmax(300px,.8fr) minmax(0,1.2fr);gap:50px;align-items:center}.app-image{min-height:520px;background:var(--panel);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden}.app-image img{width:100%;height:100%;object-fit:contain;filter:grayscale(1)}.service-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:26px}.service-list div{padding:18px;border:1px solid var(--line)}.service-list strong{display:block;color:#fff}.service-list span{font-size:13px;color:var(--muted)}
@media(max-width:980px){.top-strip__inner{grid-template-columns:1fr auto}.top-strip__links{display:none}.brand-nav{height:66px}.current-channel,.brand-nav__side--right .plain-link{display:none}.channel-row{height:42px;width:100%;padding-left:14px}.channel-nav{overflow-x:auto;scrollbar-width:none}.channel-nav::-webkit-scrollbar{display:none}.channel-nav a{padding:0 14px}.hero-grid,.feature,.intro-grid,.app-showcase{grid-template-columns:1fr}.hero-copy{order:-1}.hero-visual{min-height:460px}.grid--4,.grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-intro{grid-template-columns:1fr}.footer-groups{grid-template-columns:repeat(2,minmax(0,1fr))}.text-list article{grid-template-columns:60px minmax(0,1fr)}.text-list aside{grid-column:2;text-align:left}}
@media(max-width:680px){body{padding-bottom:74px}.shell{width:min(calc(100% - 28px),var(--max))}.top-strip__inner{width:calc(100% - 28px);height:32px}.top-strip__brand{font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.top-strip__actions a{display:none}.top-strip__actions a:first-child{display:inline}.brand-nav{width:calc(100% - 28px);grid-template-columns:1fr auto 1fr;gap:8px}.menu-trigger{width:44px;padding:0;justify-content:center}.menu-trigger span:last-child{display:none}.brand-mark{min-width:118px}.brand-mark__cn{font-size:21px}.brand-mark__en{font-size:7px}.brand-nav__side--right .button{width:54px;padding:0 8px;font-size:0}.brand-nav__side--right .button:after{content:"APP";font-size:11px}.section{padding:62px 0}.section--tight{padding:46px 0}.hero{padding:34px 0 56px}.hero-grid{gap:28px}.hero-visual{min-height:390px}.micro-item{grid-template-columns:84px 1fr}.micro-item a{grid-column:2}.section-head{align-items:start;flex-direction:column}.grid--2,.grid--3,.grid--4,.topic-grid{grid-template-columns:1fr}.topic-grid{border-left:0}.topic-item{border-left:1px solid var(--line)}.feature__copy{padding:28px}.text-list article{grid-template-columns:44px minmax(0,1fr);gap:14px}.footer-groups{grid-template-columns:1fr 1fr}.footer-legal{flex-direction:column}.panel-scroll a{grid-template-columns:1fr;gap:4px}.search-panel__body{padding-top:30px}.search-columns{grid-template-columns:1fr;gap:24px;margin-top:36px}.search-links{grid-template-columns:1fr 1fr}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:150;height:calc(62px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:rgba(0,0,0,.96);border-top:1px solid var(--line)}.mobile-bottom a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:10px;color:var(--dim);min-height:48px}.mobile-bottom a span{font-size:16px}.mobile-bottom a.is-active{color:#fff}.service-list{grid-template-columns:1fr}.app-image{min-height:380px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}:focus-visible{outline:2px solid #fff;outline-offset:3px}
