:root{--bg:#0b0e14;--bg2:#11151f;--card:#151a26;--border:#232a3a;--text:#e6e9f0;--muted:#9aa3b5;--accent:#6366f1;--accent2:#22d3ee;--ok:#34d399;--warn:#fbbf24;--bad:#f87171;--maxw:1120px;--prose:760px}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.75;overflow-wrap:break-word}
a{color:var(--accent2);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.prose{max-width:var(--prose)}

/* ---------- header / nav ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(11,14,20,.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
nav{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:700;font-size:18px;color:var(--text);text-decoration:none}
.logo span{color:var(--accent)}
nav .links{display:flex;gap:4px;font-size:14px;align-items:center}
nav .links a{color:var(--muted);padding:7px 11px;border-radius:8px}
nav .links a:hover{color:var(--text);text-decoration:none;background:var(--card)}
nav .links a.active{color:var(--text);background:rgba(99,102,241,.14)}
a.lang{border:1px solid var(--border);padding:5px 14px;border-radius:8px;font-size:13.5px;color:var(--muted);flex-shrink:0}
a.lang:hover{border-color:var(--accent);color:var(--text);text-decoration:none}

/* ---------- hero ---------- */
.hero{padding:84px 0 60px;text-align:center;background:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(99,102,241,.22),transparent)}
.hero.left{text-align:left}
.badge{display:inline-block;font-size:13px;color:var(--accent2);border:1px solid rgba(34,211,238,.35);border-radius:99px;padding:4px 14px;margin-bottom:22px;background:rgba(34,211,238,.06)}
h1{font-size:44px;line-height:1.2;font-weight:800;letter-spacing:-1px}
h1 .grad{background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{max-width:700px;margin:20px auto 0;color:var(--muted);font-size:17px}
.hero.left p.sub{margin-left:0}
.hero .cta{margin-top:32px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero.left .cta{justify-content:flex-start}
.btn{display:inline-block;padding:11px 24px;border-radius:10px;font-size:15px;font-weight:600}
.btn.primary{background:var(--accent);color:#fff}.btn.primary:hover{background:#5458e8;text-decoration:none}
.btn.ghost{border:1px solid var(--border);color:var(--text)}.btn.ghost:hover{border-color:var(--accent);text-decoration:none}

/* ---------- sections ---------- */
section{padding:56px 0;border-top:1px solid var(--border);scroll-margin-top:76px}
section.first{border-top:none}
h2{font-size:28px;font-weight:700;margin-bottom:10px}
h3{font-size:19px;font-weight:700}
p.desc{color:var(--muted);margin-bottom:30px;max-width:780px}

/* ---------- article / prose ---------- */
article{padding:48px 0 30px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:22px}
.crumb a{color:var(--muted)}.crumb a:hover{color:var(--text)}
.metaline{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13.5px;color:var(--muted);margin:16px 0 26px;padding-bottom:22px;border-bottom:1px solid var(--border)}
.metaline .cat{color:var(--accent2);font-weight:600}
.metaline .dot{opacity:.5}
.prose h2{font-size:26px;margin:40px 0 12px;padding-top:6px}
.prose h3{font-size:19px;margin:30px 0 10px}
.prose h2:first-of-type{margin-top:8px}
.prose p{margin:0 0 16px;color:#cdd3e0}
.prose p.lead{font-size:18px;color:var(--text)}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px;color:#cdd3e0}
.prose li{margin:7px 0}
.prose li::marker{color:var(--accent)}
.prose strong{color:var(--text)}
.prose blockquote{border-left:3px solid var(--accent);background:var(--card);border-radius:0 10px 10px 0;padding:14px 20px;margin:20px 0;color:var(--muted);font-style:italic}
.prose blockquote p{color:var(--muted);margin:0}
.prose a{color:var(--accent2)}
.inline{background:rgba(99,102,241,.12);color:#c7d2fe;padding:1px 7px;border-radius:5px;font-size:.9em}
.callout{background:rgba(34,211,238,.05);border:1px solid rgba(34,211,238,.25);border-radius:12px;padding:16px 20px;margin:22px 0;font-size:14.5px;color:var(--muted)}
.callout b{color:var(--text)}
.callout.warn{background:rgba(251,191,36,.05);border-color:rgba(251,191,36,.28)}
.callout.good{background:rgba(52,211,153,.05);border-color:rgba(52,211,153,.28)}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px;display:flex;flex-direction:column}
a.card{color:var(--text);text-decoration:none}
a.card:hover{border-color:var(--accent);transform:translateY(-2px)}
.card h3{font-size:17px;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.card p{font-size:14px;color:var(--muted);flex:1}
.card .more{margin-top:14px;font-size:13.5px;font-weight:600;color:var(--accent2)}
.card .kicker{font-size:12px;color:var(--accent2);font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
.tag{font-size:12px;font-weight:700;padding:2px 10px;border-radius:6px;flex-shrink:0}
.tag.c1{background:rgba(99,102,241,.15);color:#a5b4fc}
.tag.c2{background:rgba(34,211,238,.12);color:#67e8f9}
.tag.c3{background:rgba(52,211,153,.12);color:#6ee7b7}

/* ---------- tables ---------- */
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:8px 0 4px}
table{width:100%;border-collapse:collapse;font-size:14px;background:var(--card);border-radius:12px;overflow:hidden}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}
th{color:var(--muted);font-weight:600;background:var(--bg2)}
td:first-child{color:var(--text);font-weight:600}
td{color:var(--muted)}
tr:last-child td{border-bottom:none}
td.hl{color:var(--ok);font-weight:700}

/* ---------- code ---------- */
pre{background:#0d1117;border:1px solid var(--border);border-radius:12px;padding:20px;overflow-x:auto;font-size:13.5px;line-height:1.6;font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;margin:18px 0;color:#cdd3e0}
code{font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace}
:not(pre)>code{background:rgba(99,102,241,.12);color:#c7d2fe;padding:1px 6px;border-radius:5px;font-size:.9em}

/* ---------- news timeline ---------- */
.news{position:relative;padding-left:26px}
.news::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--border)}
.news-item{position:relative;padding-bottom:30px}
.news-item::before{content:"";position:absolute;left:-25px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--accent);border:2px solid var(--bg)}
.news-item time{font-size:13px;color:var(--accent2);font-weight:600}
.news-item h3{font-size:16px;margin:4px 0 6px}
.news-item p{font-size:14px;color:var(--muted)}
.news-item a.readmore{font-size:13.5px;font-weight:600}

/* ---------- warn box ---------- */
.warnbox{background:rgba(251,191,36,.06);border:1px solid rgba(251,191,36,.25);border-radius:14px;padding:24px}
.warnbox ul{list-style:none}
.warnbox li{font-size:14.5px;color:var(--muted);padding:7px 0 7px 26px;position:relative}
.warnbox li::before{content:"✕";position:absolute;left:0;color:var(--warn);font-weight:700}

/* ---------- misc ---------- */
.eco{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.eco .card{padding:18px}
.eco .stars{font-size:12.5px;color:var(--ok);font-weight:600;margin-top:10px}
.note{font-size:13.5px;color:var(--muted);background:var(--bg2);border:1px solid var(--border);border-radius:10px;padding:12px 16px;margin-top:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.kpi{display:flex;gap:26px;flex-wrap:wrap;margin:8px 0 6px}
.kpi .k{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px 22px;flex:1;min-width:150px}
.kpi .k b{display:block;font-size:26px;font-weight:800;color:var(--text)}
.kpi .k span{font-size:13px;color:var(--muted)}
.steps{counter-reset:s;list-style:none;margin:0 0 8px}
.steps li{counter-increment:s;position:relative;padding:0 0 26px 54px}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:10px;background:rgba(99,102,241,.15);color:#a5b4fc;font-weight:700;display:flex;align-items:center;justify-content:center}
.steps h3{font-size:16px;margin-bottom:4px}
.steps p{font-size:14px;color:var(--muted)}

/* ---------- related + footer ---------- */
.related{padding:40px 0;border-top:1px solid var(--border)}
.related h3{font-size:15px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:16px;font-weight:700}
.related .cards .card{padding:18px}
footer{padding:44px 0 40px;text-align:left;color:var(--muted);font-size:13.5px;border-top:1px solid var(--border);background:var(--bg2)}
.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
footer h4{font-size:13px;color:var(--text);margin-bottom:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em}
footer .fcol a{display:block;color:var(--muted);padding:4px 0}
footer .fcol a:hover{color:var(--text);text-decoration:none}
footer .fbrand p{max-width:300px;margin-top:10px}
footer .disc{max-width:720px;margin:18px auto 0;font-size:12.5px;opacity:.8;border-top:1px solid var(--border);padding-top:18px}
footer .fbrand .logo{font-size:17px}

/* ---------- root landing ---------- */
.rootbox{max-width:640px;margin:0 auto;padding:70px 24px;text-align:center}
.rootbox .logo{font-size:30px;font-weight:800;margin-bottom:16px;display:block}
.rootbox h1{font-size:26px;font-weight:700;margin-bottom:12px}
.rootbox p{color:var(--muted);font-size:15px;margin-bottom:28px}
.rootbtns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:26px}
.rootbox .autos{font-size:13px;color:var(--muted);opacity:.7}
.rootbox .quicklinks{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:20px}
.rootbox .quicklinks a{font-size:13px;color:var(--muted);border:1px solid var(--border);padding:6px 14px;border-radius:8px}
.rootbox .quicklinks a:hover{border-color:var(--accent);color:var(--text);text-decoration:none}

/* ---------- contact form (mailto) ---------- */
.formnote{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px}
.formnote a.mail{display:inline-block;margin-top:14px}

/* ---------- responsive ---------- */
@media(max-width:860px){
.grid3{grid-template-columns:1fr 1fr}
.fgrid{grid-template-columns:1fr 1fr;gap:24px}
footer .fbrand{grid-column:1/-1}
}
@media(max-width:760px){
.grid2,.grid3{grid-template-columns:1fr}
h1{font-size:32px;letter-spacing:-.5px}
h2{font-size:23px}
.hero{padding:56px 0 46px}
.hero p.sub{font-size:15.5px}
section{padding:44px 0;scroll-margin-top:110px}
p.desc{margin-bottom:24px}
.card{padding:18px}
.card h3{font-size:15.5px}
.card p{font-size:13.5px}
th,td{padding:10px 12px;font-size:13px}
td:first-child{white-space:normal}
pre{font-size:12px;padding:14px 12px}
.note{font-size:12.5px}
.warnbox{padding:18px}
.warnbox li{font-size:13.5px;padding-left:24px}
.news-item h3{font-size:15px}
nav{flex-wrap:wrap;height:auto;padding:12px 0 4px;row-gap:10px;gap:12px}
nav .links{order:3;width:100%;overflow-x:auto;gap:6px;padding-bottom:6px;justify-content:flex-start;scrollbar-width:none}
nav .links::-webkit-scrollbar{display:none}
nav .links a{white-space:nowrap;flex-shrink:0}
footer{padding:34px 0 34px}
.fgrid{grid-template-columns:1fr 1fr}
.kpi .k{min-width:120px;padding:14px 16px}
.kpi .k b{font-size:22px}
}
@media(max-width:480px){.fgrid{grid-template-columns:1fr}}