:root{
  --ink:#000000; --panel:#17171A; --panel-2:#101012; --line:#26262B;
  --text:#F2F2F4; --muted:#8A8A93; --blue:#0A59F7; --green:#30D158; --warn:#FF9F0A;
  --maxw:1000px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--ink);color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Inter","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

.topbar{display:flex;align-items:center;justify-content:space-between;padding:24px 0;border-bottom:1px solid #131316;}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:-.01em;}
.brand-mark{width:26px;height:26px;border-radius:8px;background:linear-gradient(145deg,#1B2A5C 0%,#0A59F7 100%);box-shadow:0 0 18px rgba(10,89,247,.45);position:relative;flex:none;}
.brand-mark::after{content:"";position:absolute;inset:7px;border-radius:3px;border:1.5px solid rgba(255,255,255,.85);border-bottom-color:transparent;}
.topbar nav{display:flex;gap:22px;font-size:14px;color:var(--muted);}
.topbar nav a:hover{color:var(--text);}
@media (max-width:720px){.topbar nav{display:none;}}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 26px;border-radius:18px;font-size:15.5px;font-weight:600;background:var(--blue);color:#fff;transition:transform .16s ease,box-shadow .16s ease;}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 28px rgba(10,89,247,.35);}
.btn:focus-visible{outline:2px solid #7FA8FF;outline-offset:3px;}
.btn small{font-weight:500;opacity:.75;font-size:13px;}
.btn-quiet{background:transparent;border:1px solid var(--line);color:#D3D3DA;font-weight:500;}
.btn-quiet:hover{border-color:#3A3A42;box-shadow:none;}

.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center;padding:60px 0 76px;}
.meta{font-size:13px;color:var(--muted);margin-bottom:20px;}
.meta span+span::before{content:"/";margin:0 10px;color:#3A3A42;}
h1{font-size:clamp(42px,7.2vw,76px);line-height:1;letter-spacing:-.045em;font-weight:700;margin:0 0 24px;}
.lede{font-size:18.5px;line-height:1.7;color:#C9C9D0;max-width:34ch;margin:0 0 32px;}
.lede strong{color:var(--text);font-weight:600;}
.actions{display:flex;flex-wrap:wrap;gap:13px;}
@media (max-width:860px){.hero{grid-template-columns:1fr;gap:44px;padding:34px 0 56px;}.phone{order:-1;}}

.phone{width:250px;margin:0 auto;background:#000;border:1px solid var(--line);border-radius:38px;padding:14px 12px 18px;box-shadow:0 30px 80px -30px rgba(10,89,247,.35),0 0 0 6px #0A0A0B;position:relative;}
.phone::before{content:"";position:absolute;top:9px;left:50%;transform:translateX(-50%);width:56px;height:5px;border-radius:3px;background:#1E1E22;}
.screen{padding-top:22px;}
.s-title{font-size:25px;font-weight:700;letter-spacing:-.03em;}
.s-sub{font-size:11.5px;color:#8A8A93;margin-top:5px;}
.s-card{background:var(--panel);border:1px solid #26262B;border-radius:16px;padding:14px;margin-top:14px;}
.s-row{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.s-row .k{font-size:13px;font-weight:500;}
.s-row .v{font-size:11px;color:#8A8A93;margin-top:3px;}
.toggle{width:34px;height:20px;border-radius:10px;background:#0A59F7;position:relative;flex:none;}
.toggle::after{content:"";position:absolute;top:2.5px;right:2.5px;width:15px;height:15px;border-radius:50%;background:#fff;}
.divider{height:1px;background:#26262B;margin:12px 0;}
.logs{margin-top:14px;font-family:ui-monospace,"SF Mono",Menlo,monospace;font-size:11px;line-height:1.9;color:#A0A0A8;}
.logs .ok{color:var(--green);}
.s-btn{margin-top:16px;background:var(--blue);border-radius:14px;text-align:center;font-size:14px;font-weight:600;padding:12px 0;}

/* 入口按钮区 */
.entries{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;padding:8px 0 84px;}
.entry{display:block;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:22px;transition:border-color .16s ease,transform .16s ease;}
.entry:hover{border-color:#3A3A42;transform:translateY(-2px);}
.entry:focus-visible{outline:2px solid #7FA8FF;outline-offset:3px;}
.entry b{display:block;font-size:16px;font-weight:600;margin-bottom:6px;}
.entry span{font-size:13.5px;color:var(--muted);line-height:1.6;display:block;}
@media (max-width:760px){.entries{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.entries{grid-template-columns:1fr;}}

/* 内页 */
.page-head{padding:56px 0 40px;}
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px;}
.crumb a:hover{color:var(--text);}
.page-head h1{font-size:clamp(30px,5vw,44px);line-height:1.15;letter-spacing:-.035em;margin:0 0 18px;max-width:20ch;}
.page-head p{font-size:17px;color:#C3C3CB;max-width:58ch;margin:0;}
section{padding:56px 0;border-top:1px solid #131316;}
h2{font-size:24px;letter-spacing:-.02em;font-weight:700;margin:0 0 18px;max-width:24ch;}
.body-text{font-size:16px;color:#BFBFC7;max-width:62ch;margin:0;}
.body-text+.body-text{margin-top:14px;}

.specs{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);margin-top:36px;}
.spec{padding:20px 20px 20px 0;border-bottom:1px solid var(--line);}
.spec:nth-child(3n+2),.spec:nth-child(3n+3){padding-left:20px;border-left:1px solid var(--line);}
.spec dt{font-size:12.5px;color:var(--muted);margin-bottom:6px;}
.spec dd{margin:0;font-size:16px;font-weight:600;}
@media (max-width:720px){.specs{grid-template-columns:repeat(2,1fr);}.spec:nth-child(n){padding-left:0;border-left:none;}.spec:nth-child(even){padding-left:16px;border-left:1px solid var(--line);}}

.features{display:grid;grid-template-columns:repeat(2,1fr);gap:0 44px;margin-top:32px;}
.feature{border-top:1px solid var(--line);padding:22px 0;}
.feature h3{font-size:17px;font-weight:600;margin:0 0 8px;}
.feature p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.7;}
@media (max-width:720px){.features{grid-template-columns:1fr;}}

.notice{background:var(--panel-2);border:1px solid var(--line);border-left:3px solid var(--blue);border-radius:0 16px 16px 0;padding:24px 26px;margin-top:32px;}
.notice h3{margin:0 0 12px;font-size:16px;font-weight:600;}
.notice ol{margin:0;padding-left:20px;color:#B9B9C2;font-size:15px;line-height:1.85;}
.notice li+li{margin-top:9px;}
.notice b{color:var(--text);font-weight:600;}
.warn{color:var(--warn);font-weight:600;}

.steps{margin-top:32px;counter-reset:step;}
.step{display:grid;grid-template-columns:42px 1fr;gap:18px;padding:24px 0;border-top:1px solid var(--line);align-items:start;}
.step::before{counter-increment:step;content:counter(step);font-size:13px;font-weight:600;color:var(--muted);border:1px solid var(--line);border-radius:50%;width:30px;height:30px;display:flex;align-items:center;justify-content:center;}
.step h3{margin:0 0 6px;font-size:17px;font-weight:600;}
.step p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.7;max-width:56ch;}

.qa{margin-top:28px;}
.qa-item{border-top:1px solid var(--line);padding:22px 0;}
.qa-item h3{margin:0 0 8px;font-size:16.5px;font-weight:600;line-height:1.5;}
.qa-item p{margin:0;color:#B0B0B8;font-size:14.8px;line-height:1.8;max-width:64ch;}
.qa-item code{font-family:ui-monospace,Menlo,monospace;font-size:13px;background:#1B1B1F;padding:2px 6px;border-radius:5px;color:#C9C9D0;}
.qa-item .tag{display:inline-block;font-size:12px;color:var(--warn);border:1px solid #3A2E18;background:#1C1710;border-radius:6px;padding:1px 7px;margin-left:8px;vertical-align:2px;}

.file{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:24px;max-width:520px;}
.file-name{font-size:15px;font-weight:600;word-break:break-all;}
.file-meta{font-size:12.5px;color:var(--muted);margin-top:8px;line-height:1.9;}
.file-meta code{font-family:ui-monospace,Menlo,monospace;font-size:11.5px;color:#9A9AA4;}
.file .btn{margin-top:20px;width:100%;}

.next{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:34px 0 0;border-top:1px solid #131316;margin-top:36px;font-size:14.5px;}

footer{border-top:1px solid #131316;margin-top:24px;padding:30px 0 52px;font-size:13px;color:#6E6E77;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;}
footer a{color:#8A8A93;border-bottom:1px solid #2E2E34;}
footer a:hover{color:var(--text);}