/* 基础 */
:root{--bg:#000;--surface:#111;--line:#2b2b2b;--text:#f5f5f5;--muted:#a3a3a3;--width:1200px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}
h1,h2,h3,p,figure{margin:0}a{color:inherit;text-decoration:none}img,video{display:block;max-width:100%;height:auto}a:focus-visible,summary:focus-visible,video:focus-visible{outline:3px solid #b4e94d;outline-offset:5px}
h2{font-size:36px;line-height:1.4;font-weight:700}h3{font-size:21px;line-height:1.5}
.container{width:min(var(--width),calc(100% - 100px));margin-inline:auto}.section{padding-block:100px}.shaded{background:var(--surface)}
.skip-link{position:fixed;top:-100px;left:15px;z-index:100;background:white;color:black;padding:10px 16px}.skip-link:focus{top:10px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:15px;min-height:58px;padding:13px 30px;border:1px solid var(--line);border-radius:8px;font-weight:700;font-size:16px;transition:background .2s,border-color .2s,transform .2s}.button:hover{transform:translateY(-2px)}.primary{background:white;color:#090909;border-color:white}.primary:hover{background:#e5e5e5}.outline{background:transparent}.outline:hover{background:#202020;border-color:#666}.compact{min-height:48px;padding:9px 24px;font-size:14px}.actions{display:flex;flex-wrap:wrap;gap:20px}
/* 导航 */
.header{background:#000e;border-bottom:1px solid #161616;position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.header-inner{display:flex;align-items:center;gap:45px;min-height:104px}.logo{margin-right:auto;flex-shrink:0}.logo img{width:110px;height:40px;object-fit:contain}.desktop-nav{display:flex;gap:32px;font-size:15px;color:#bbb}.desktop-nav a:hover{color:white}.header-actions{display:flex;align-items:center;gap:14px}.language{font-size:13px;padding:9px 15px;border:1px solid #1c1c1c;border-radius:8px}.mobile-menu{display:none}
/* 首屏 */
.hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:90px;min-height:740px;padding-block:65px}.hero h1{font-size:64px;line-height:1.2;font-weight:800;letter-spacing:-2px}.hero-copy>p{max-width:520px;font-size:18px;color:#aaa;margin:28px 0 40px;line-height:1.85}.hero-media{justify-self:center;width:285px}.hero-media video{width:100%;aspect-ratio:445/925;object-fit:cover;border-radius:34px;background:#080808}.hero-media figcaption{text-align:center;color:#828282;font-size:10px;margin-top:12px}
/* 模块 */
.section-heading{text-align:center;margin-bottom:58px}.section-heading h2::after{content:'';display:block;width:60px;height:2px;background:white;margin:18px auto 0}.section-heading p{color:var(--muted);margin-top:12px;font-size:16px}
.ecosystem-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px}.card{padding:34px;border:1px solid var(--line);border-radius:8px}.card p{color:var(--muted);font-size:15px;margin-top:17px;line-height:1.9}.card h3{font-size:20px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.intro{color:var(--muted);font-size:16px;margin-top:18px}.feature-list{display:grid;gap:25px;margin-top:36px}.feature-list article{display:flex;gap:18px;align-items:flex-start}.feature-list article>span{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid #363636;border-radius:8px;font-size:25px;flex-shrink:0}.feature-list h3{font-size:19px}.feature-list p{color:var(--muted);font-size:14px;margin-top:6px;line-height:1.85}.section-image{width:100%;height:440px;object-fit:contain}
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.news-card{padding:30px}.category{display:block;color:#8a8a8a;font-size:11px;letter-spacing:1px;margin-bottom:18px}.news-card h3{min-height:60px}.news-card details{margin-top:24px}.news-card summary{cursor:pointer;font-size:14px;list-style:none;display:flex;justify-content:space-between}.news-card details p{font-size:13px}.download{text-align:center}.download p{margin:18px 0 32px;color:var(--muted)}.download .actions{justify-content:center}
.faq{max-width:880px}.faq details{border:1px solid var(--line);border-radius:8px;margin-top:16px;background:#0b0b0b}.faq summary{display:flex;justify-content:space-between;align-items:center;gap:20px;cursor:pointer;padding:23px 26px;list-style:none;font-size:17px}.faq summary::after{content:'+';font-size:24px;color:#aaa}.faq details[open] summary::after{content:'−'}.faq details p{color:var(--muted);padding:0 26px 23px;font-size:14px}.faq p a{text-decoration:underline;color:white}summary::-webkit-details-marker{display:none}
/* 页脚 */
.footer{padding-block:60px 28px}.social{display:flex;align-items:center;justify-content:space-between;padding-bottom:30px;border-bottom:1px solid var(--line);margin-bottom:38px}.social h2,.footer-grid h2{font-size:16px}.social a{font-size:13px;color:#aaa}.footer-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:30px}.footer-grid h2{margin-bottom:20px}.footer-grid a{display:block;font-size:13px;color:#999;margin-top:10px}.footer-grid a:hover{color:white}.site-note{margin-top:40px;padding-top:22px;border-top:1px solid var(--line);color:#858585;font-size:11px}.site-note p+p{margin-top:7px}
/* 响应式 */
@media(max-width:1100px){.container{width:calc(100% - 60px)}.header-inner{gap:24px}.desktop-nav{gap:23px}.language{display:none}.hero{gap:50px}.ecosystem-grid{gap:18px}.card{padding:26px}.split{gap:50px}.news-grid{gap:18px}}
@media(max-width:800px){html{scroll-padding-top:80px}.container{width:calc(100% - 40px)}.header-inner{min-height:76px;gap:16px}.logo img{width:94px;height:36px}.desktop-nav{display:none}.header-actions{margin-left:auto;gap:10px}.compact{padding:8px 16px;min-height:40px;font-size:13px}.mobile-menu{display:block}.mobile-menu>summary{list-style:none;font-size:24px;cursor:pointer}.mobile-menu nav{position:absolute;top:76px;left:0;right:0;background:#101010;border-bottom:1px solid #333;padding:16px 25px}.mobile-menu nav a{display:block;padding:9px 0}.hero{grid-template-columns:1fr;gap:40px;min-height:0;text-align:center;padding-block:55px}.hero h1{font-size:52px}.hero-copy>p{font-size:16px;margin:22px auto 28px}.hero .actions{justify-content:center}.hero-media{width:255px}.section{padding-block:65px}h2{font-size:29px}.section-heading{margin-bottom:35px}.section-heading p{font-size:14px}.ecosystem-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.split{grid-template-columns:1fr;gap:35px}.section-image{height:320px;max-width:460px;justify-self:center}#features .section-image{order:2}.news-grid{grid-template-columns:1fr}.news-card h3{min-height:0}.news-card{padding:26px}.footer-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:30px 20px}.faq summary{font-size:15px;padding:20px}.faq details p{padding:0 20px 20px}}
@media(max-width:420px){.header-inner{gap:12px}.header-actions .compact:first-of-type{display:none}.ecosystem-grid{grid-template-columns:1fr}.card{padding:25px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-media{width:240px}.button{padding:12px 24px;min-height:52px;font-size:15px}.header .compact{padding:8px 16px;min-height:40px;font-size:13px}.feature-list article{gap:13px}.feature-list h3{font-size:18px}.section-image{height:280px}.social{gap:20px}.social a{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}