:root{--bg:#0b0d10;--bg2:#111419;--bg3:#161a21;--line:#232833;--fg:#e6e9ef;--fg2:#a3abb9;--fg3:#6b7383;--acc:#2dd4bf;--acc2:#14b8a6;--warn:#fbbf24;
--sans:"Inter","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Noto Sans",system-ui,sans-serif;
--mono:"JetBrains Mono","Cascadia Code",Consolas,"SF Mono",Menlo,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.7 var(--sans);border-top:2px solid var(--acc)}
a{color:inherit}img{max-width:100%;height:auto;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}.narrow{max-width:780px}
.mono,code,pre{font-family:var(--mono)}.small{font-size:13px;color:var(--fg2)}.tiny{font-size:12px;color:var(--fg3);word-break:break-all}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--acc);color:#000;padding:6px 10px;z-index:9}
.top{position:sticky;top:0;z-index:5;background:rgba(11,13,16,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;height:58px;gap:12px}
.brand{display:flex;gap:10px;align-items:center;text-decoration:none}.brand img{border-radius:6px;background:#fff}
.brand span{display:flex;flex-direction:column;line-height:1.1}.brand small{color:var(--fg3);font-size:11px}
.links{display:flex;align-items:center;gap:18px;font-size:14px}.links>a{text-decoration:none;color:var(--fg2)}.links>a:hover{color:var(--fg)}
.lang{position:relative}.lang summary{list-style:none;cursor:pointer;color:var(--fg2);border:1px solid var(--line);border-radius:6px;padding:3px 10px;font-size:13px}
.lang summary::-webkit-details-marker{display:none}
.lang .menu{position:absolute;right:0;top:34px;background:var(--bg2);border:1px solid var(--line);border-radius:8px;padding:6px;display:grid;min-width:140px}
.lang .menu a{padding:5px 10px;text-decoration:none;border-radius:5px;font-size:14px}.lang .menu a:hover,.lang .menu a[aria-current]{background:var(--bg3);color:var(--acc)}
.kicker{display:block;font:12px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--acc);margin-bottom:14px}
h1{font-size:clamp(32px,5vw,52px);line-height:1.15;margin:0 0 18px;letter-spacing:-.01em}
h2{font-size:clamp(24px,3.4vw,34px);line-height:1.25;margin:0 0 10px}h3{font-size:19px;margin:0 0 8px}
.hero{padding:72px 0 24px;background:radial-gradient(900px 400px at 15% -10%,rgba(45,212,191,.12),transparent 70%)}
.hgrid{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.lead{color:var(--fg2);font-size:17px;max-width:560px}.meta{color:var(--fg3);font-size:12.5px}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 14px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 18px;border-radius:8px;border:1px solid var(--line);background:var(--bg3);text-decoration:none;font-weight:600;font-size:15px}
.btn:hover{border-color:var(--fg3)}.btn.pri{background:var(--acc);border-color:var(--acc);color:#04211d}.btn.pri:hover{background:var(--acc2)}
.spec{margin:0;border:1px solid var(--line);border-radius:12px;background:var(--bg2);padding:8px 18px}
.spec div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}.spec div:last-child{border:0}
.spec dt{color:var(--fg3)}.spec dd{margin:0;text-align:right}
.shot{margin:40px 0 0;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.sec{padding:80px 0;border-top:1px solid var(--line)}.sub{color:var(--fg2);max-width:720px}
.demo{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;align-items:center;margin-top:56px}
.demo.flip .dtext{order:2}.demo p{color:var(--fg2)}.demo figure{margin:0;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.caps{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin:28px 0}
.cap{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:20px}
.cap h3{font-size:16px;color:var(--acc)}.cap ul{margin:0;padding-left:18px;color:var(--fg2);font-size:14.5px}
.dl{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:26px 0}
.card{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:22px}.card code{color:var(--fg2)}
.alt{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;color:var(--fg3);font-size:14px}
.alt code{background:var(--bg3);border:1px solid var(--line);padding:3px 8px;border-radius:6px;color:var(--fg)}
.steps{color:var(--fg2);padding-left:20px;margin:24px 0}
.note{border-left:3px solid var(--warn);background:rgba(251,191,36,.06);padding:12px 16px;border-radius:0 8px 8px 0;color:var(--fg2);font-size:14.5px}
.notes summary{cursor:pointer;color:var(--fg2);margin-top:16px}.notes pre{white-space:pre-wrap;background:var(--bg2);border:1px solid var(--line);border-radius:8px;padding:14px;font-size:13px;color:var(--fg2)}
.faqlinks,.faqidx{list-style:none;padding:0;display:grid;gap:10px;margin:24px 0}
.faqlinks a,.faqidx a{display:block;padding:14px 18px;background:var(--bg2);border:1px solid var(--line);border-radius:10px;text-decoration:none}
.faqlinks a:hover,.faqidx a:hover{border-color:var(--acc)}.faqidx span{display:block;color:var(--fg3);font-size:14px}
.article h1{font-size:clamp(28px,4vw,40px)}.article p,.article li{color:var(--fg2)}.article h2{font-size:22px;margin-top:36px}
.article code{background:var(--bg3);padding:1px 6px;border-radius:4px;font-size:.9em}.crumb{color:var(--fg3);font-size:14px;text-decoration:none}
.map{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}.map th,.map td{border-bottom:1px solid var(--line);padding:10px 8px;text-align:left;vertical-align:top}
.map th{color:var(--fg3);font-weight:500}.map td:first-child{white-space:nowrap}
kbd{font:12px var(--mono);border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:1px 6px;background:var(--bg3)}
.foot{border-top:1px solid var(--line);padding:40px 0 30px;color:var(--fg3);font-size:14px}
.fcols{display:grid;grid-template-columns:1.2fr 1fr 1.6fr;gap:24px}.fcols a{display:inline-block;margin:0 14px 6px 0;text-decoration:none}.fcols a:hover{color:var(--fg)}
.fcols b{color:var(--fg)}.legal{margin-top:24px;font-size:12.5px}
.langhint{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);background:var(--bg3);border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:14px;display:flex;gap:12px;align-items:center;z-index:9;box-shadow:0 10px 30px rgba(0,0,0,.5)}
.langhint a{color:var(--acc)}.langhint button{background:none;border:0;color:var(--fg3);cursor:pointer;font-size:16px}
@media (max-width:860px){.hgrid,.demo,.dl,.fcols{grid-template-columns:1fr}.demo.flip .dtext{order:0}.links>a:not(:last-of-type){display:none}.hero{padding-top:44px}.sec{padding:56px 0}.map td:first-child{white-space:normal}}