:root{--bg:#0d1117;--panel:#151b23;--panel2:#1b2330;--line:#2a3442;--text:#e6edf3;--muted:#9ba8b7;--blue:#65a9ff;--cyan:#59d8e7;--green:#62d49b;--yellow:#e7c66b;--radius:12px;--shadow:0 18px 48px rgba(0,0,0,.28)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 "Segoe UI","Microsoft YaHei",sans-serif}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
img{display:block;max-width:100%;height:auto}
.skip{position:absolute;left:-999px;top:8px;z-index:99;background:#fff;color:#111;padding:8px 12px}
.skip:focus{left:8px}
.shell{min-height:100vh;display:grid;grid-template-columns:240px 1fr}
.sidebar{position:sticky;top:0;height:100vh;border-right:1px solid var(--line);background:#0a0e14;padding:24px 18px;display:flex;flex-direction:column}
.brand{display:flex;align-items:center;gap:11px;color:var(--text);font-size:18px;font-weight:700}
.brand:hover{text-decoration:none}
.brand img{width:36px;height:36px;border-radius:8px}
.nav-label{margin:32px 10px 8px;color:#738196;font:12px/1.3 Consolas,monospace;text-transform:uppercase;letter-spacing:.12em}
.side-nav{display:grid;gap:5px}
.side-nav a{color:var(--muted);padding:9px 11px;border-radius:7px}
.side-nav a:hover,.side-nav a[aria-current=page]{background:var(--panel2);color:#fff;text-decoration:none}
.side-nav a::before{content:"›";color:#526274;margin-right:9px}
.side-nav a[aria-current=page]::before{color:var(--blue)}
.side-note{margin-top:auto;border-top:1px solid var(--line);padding:18px 8px 0;color:#758397;font-size:12px}
.workspace{min-width:0}
.topbar{height:62px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 5vw;position:sticky;top:0;background:rgba(13,17,23,.92);backdrop-filter:blur(12px);z-index:10}
.mobile-toggle{display:none;background:var(--panel);border:1px solid var(--line);border-radius:7px;color:var(--text);padding:7px 10px}
.command{border:1px solid var(--line);background:var(--panel);color:var(--muted);border-radius:7px;padding:7px 12px;min-width:310px;text-align:left}
.command kbd{float:right;background:#252e3b;border:1px solid #394657;border-radius:4px;padding:0 5px;font:12px Consolas,monospace}
.toplinks{display:flex;gap:18px;font-size:14px}
.toplinks a{color:var(--muted)}
.wrap{width:min(1120px,90%);margin-inline:auto}
.hero{padding:76px 0 60px;background:radial-gradient(circle at 80% 20%,rgba(43,110,179,.2),transparent 31%)}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:55px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--cyan);font:13px Consolas,monospace;letter-spacing:.04em}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 12px var(--green)}
h1{font-size:clamp(40px,5.3vw,68px);line-height:1.08;margin:17px 0 18px;letter-spacing:-.04em}
h2{font-size:clamp(28px,3.4vw,42px);line-height:1.2;margin:8px 0 12px;letter-spacing:-.025em}
h3{margin:0 0 8px;line-height:1.35}
.lead{color:#b8c3d1;font-size:19px;max-width:680px}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin:27px 0}
.btn{display:inline-flex;justify-content:center;align-items:center;border:1px solid var(--line);border-radius:7px;padding:11px 18px;color:#d8e2ee;background:var(--panel);font-weight:650}
.btn:hover{background:#202a37;text-decoration:none}
.btn.primary{background:#2476d2;border-color:#398be8;color:#fff}
.btn.primary:hover{background:#3285e2}
.facts{display:flex;gap:10px;flex-wrap:wrap}
.facts span,.tag{border:1px solid var(--line);background:#101721;border-radius:999px;padding:4px 10px;color:var(--muted);font:13px Consolas,monospace}
.ide-window{border:1px solid #344152;background:#111823;border-radius:13px;box-shadow:var(--shadow);overflow:hidden}
.window-bar{height:38px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:7px;padding:0 13px;color:#77869a;font:12px Consolas,monospace}
.dot{width:9px;height:9px;border-radius:50%;background:#ff6b69}.dot:nth-child(2){background:#e7c66b}.dot:nth-child(3){background:#62d49b}
.window-title{margin-left:8px}
.ide-window img{width:880px;aspect-ratio:880/700;object-fit:cover}
section{padding:72px 0}
.soft{background:#10151d;border-block:1px solid var(--line)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:28px}
.section-head>p{max-width:520px;color:var(--muted)}
.grid{display:grid;gap:18px}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}
.card{border:1px solid var(--line);background:var(--panel);border-radius:var(--radius);padding:23px;transition:.2s transform,.2s border}
.card:hover{transform:translateY(-3px);border-color:#43536a}
.card p{color:var(--muted)}
.icon{font:22px Consolas,monospace;color:var(--blue);margin-bottom:14px}
.quick{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:15px}
.quick a{border:1px solid var(--line);background:var(--panel);border-radius:9px;padding:17px;color:var(--text)}
.quick a:hover{border-color:var(--blue);text-decoration:none}
.quick small{display:block;color:var(--muted)}
.detail{display:grid;grid-template-columns:280px 1fr;gap:45px;align-items:start}
.detail-menu{position:sticky;top:88px;border:1px solid var(--line);border-radius:10px;padding:10px;background:var(--panel)}
.detail-menu a{display:block;padding:9px 11px;color:var(--muted)}
.detail-content article{padding:0 0 38px;border-bottom:1px solid var(--line);margin-bottom:38px}
.checklist{padding:0;list-style:none}.checklist li{margin:9px 0;color:var(--muted)}.checklist li::before{content:"✓";color:var(--green);margin-right:9px}
.platform{display:flex;justify-content:space-between;align-items:center;gap:20px}
.platform strong{font-size:20px}.platform p{margin:3px 0}
.download-card{position:relative}.recommended{border-color:#2d7ccc}.recommended::after{content:"推荐";position:absolute;right:17px;top:17px;color:var(--cyan);font:12px Consolas,monospace}
.code{background:#090d12;border:1px solid var(--line);border-radius:8px;padding:13px;color:#b6c7d9;font:14px Consolas,monospace;overflow:auto}
.steps{counter-reset:step}.step{position:relative;padding-left:68px;margin-bottom:35px}.step::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:42px;height:42px;border:1px solid #3e7dbc;border-radius:9px;display:grid;place-items:center;color:var(--cyan);font:18px Consolas,monospace}
details{border:1px solid var(--line);background:var(--panel);border-radius:9px;padding:16px 18px;margin:10px 0}summary{cursor:pointer;font-weight:650}details p{color:var(--muted)}
.cta{border:1px solid #315f8a;background:linear-gradient(120deg,#14273c,#172130);border-radius:15px;padding:40px;display:flex;justify-content:space-between;align-items:center;gap:30px}
.cta h2{font-size:30px}
footer{border-top:1px solid var(--line);padding:48px 0 30px;background:#090d12}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:35px}
.footer-grid h3{font-size:15px}.footer-grid a{display:block;color:var(--muted);margin:7px 0}
.footer-grid p,.legal{color:#748296;font-size:13px}
.legal{border-top:1px solid var(--line);margin-top:32px;padding-top:20px;display:flex;justify-content:space-between;gap:20px}
.notice{border-left:3px solid var(--yellow);background:#191912;padding:15px 18px;color:#c9c4ad}
@media(max-width:980px){.shell{grid-template-columns:1fr}.sidebar{position:fixed;inset:0 auto 0 0;width:250px;z-index:30;transform:translateX(-101%);transition:.2s}.sidebar.open{transform:none}.mobile-toggle{display:block}.command{min-width:0;width:55%}.hero-grid,.detail{grid-template-columns:1fr}.grid-4{grid-template-columns:repeat(2,1fr)}.detail-menu{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.toplinks{display:none}.command{width:75%}.hero{padding-top:48px}.grid-4,.grid-3,.grid-2,.quick,.footer-grid{grid-template-columns:1fr}.section-head,.cta,.legal{align-items:start;flex-direction:column}.platform{align-items:start;flex-direction:column}section{padding:54px 0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}