:root{--h:265;--ah:42;--sat:54%;--lit:62%;--radius:22px;--space:1.25;--max:1138px;--bg:hsl(var(--h) 34% 8%);--panel:hsl(var(--h) 25% 13%);--ink:hsl(var(--h) 20% 96%);--muted:hsl(var(--h) 14% 70%);--accent:hsl(var(--ah) var(--sat) var(--lit));--line:hsl(var(--h) 20% 28%)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 system-ui,-apple-system,"Microsoft YaHei",sans-serif}body.light{--bg:hsl(var(--h) 35% 96%);--panel:white;--ink:hsl(var(--h) 35% 11%);--muted:hsl(var(--h) 12% 38%);--line:hsl(var(--h) 18% 82%)}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button{cursor:pointer}.shell{width:min(var(--max),92vw);margin:auto}.topbar{display:flex;align-items:center;gap:22px;padding:20px 0;border-bottom:1px solid var(--line);position:relative;z-index:4}.brand{font-weight:900;letter-spacing:.06em;margin-right:auto}.nav{display:flex;gap:18px;align-items:center}.nav a,.tool{color:var(--muted)}.tool{border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:7px 11px}.nav-toggle{display:none;align-items:center;justify-content:center;line-height:1}.nav-backdrop{display:none;position:fixed;inset:0;background:#0008;z-index:15}.nav-backdrop.open{display:block}.hero{position:relative;display:grid;gap:clamp(28px,5vw,70px);align-items:center;padding:calc(54px * var(--space)) 0;overflow:hidden}.hero-copy{position:relative}.eyebrow,.kicker{color:var(--accent);font-weight:800;letter-spacing:.15em;text-transform:uppercase}h1{font-size:clamp(38px,5.2vw,70px);line-height:1.08;letter-spacing:-.035em;margin:14px 0 22px;overflow-wrap:anywhere}h2{line-height:1.25}.lead{font-size:clamp(17px,2vw,20px);color:var(--muted);max-width:780px}.hero-art{min-height:360px;border:1px solid var(--line);border-radius:calc(var(--radius) + 12px);background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 22%,transparent),var(--panel));overflow:hidden;display:grid;place-items:center;position:relative}.hero-art img{width:100%;height:100%;object-fit:cover}.section{padding:calc(44px * var(--space)) 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}.section-head p,.muted{color:var(--muted)}.cards{display:grid;gap:18px}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:calc(25px * var(--space));transition:transform .2s,border-color .2s}.card:hover{transform:translateY(-3px);border-color:var(--accent)}.card-index{font-weight:900;color:var(--accent)}.card p{color:var(--muted)}.article{width:min(760px,92vw);margin:auto;padding:56px 0}.article h1{font-size:clamp(34px,5vw,58px)}.article-figure{margin:24px 0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}.article-figure img{width:100%;display:block;object-fit:cover;max-height:420px}.article-body{font-size:18px}.article-body p{margin:1.2em 0}.crumbs{color:var(--muted);font-size:14px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin:28px 0}.button{display:inline-block;background:var(--accent);color:hsl(var(--h) 40% 8%);border:0;border-radius:999px;padding:10px 17px;font-weight:800}.button.secondary{background:var(--panel);color:var(--ink);border:1px solid var(--line)}details{padding:16px 0;border-bottom:1px solid var(--line)}summary{font-weight:750;cursor:pointer}.search-layer{position:fixed;inset:0;background:#000b;z-index:20;display:none;padding:8vh 5vw}.search-layer.open{display:block}.search-box{max-width:760px;margin:auto;background:var(--panel);border:1px solid var(--line);padding:24px;border-radius:var(--radius)}.search-box input,.form input,.form textarea{width:100%;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:8px;padding:12px}.result{display:block;padding:14px 0;border-bottom:1px solid var(--line)}.form{display:grid;gap:14px;max-width:680px}.form label{display:grid;gap:5px}.hp{position:absolute;left:-9999px}footer{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);margin-top:50px}.hero{grid-template-columns:1fr 1fr}.cards{display:grid;grid-template-columns:repeat(12,1fr)}.card{grid-column:span 4}.card:nth-child(1),.card:nth-child(4){grid-column:span 7}.card:nth-child(2),.card:nth-child(5){grid-column:span 5}
.card,.hero-art{background:linear-gradient(145deg,#ffffff15,#ffffff06);backdrop-filter:blur(18px)}.topbar{align-items:flex-start}.nav{border-left:1px solid var(--line);padding-left:20px}
h1,h2,.brand{font-family:Inter,system-ui,"Microsoft YaHei",sans-serif}h1{font-size:clamp(36px,4.3vw,58px);line-height:1.1;letter-spacing:-.025em}
@media(max-width:800px){.nav-toggle{display:inline-flex}.nav{position:fixed;top:0;right:-100%;bottom:0;width:min(80vw,320px);flex-direction:column;align-items:flex-start;gap:22px;padding:88px 26px 26px;background:var(--panel);border-left:1px solid var(--line);transition:right .25s ease;z-index:16}.nav.open{right:0}.nav a{display:block;font-size:16px}.hero,.cards,.card{grid-template-columns:1fr!important}.card{grid-column:auto!important;transform:none!important}.hero-art{min-height:260px;position:relative}h1{font-size:clamp(32px,9vw,46px)}}

/* AI-generated per-site template layer */
:root{
  --bg:#0a0a14;--bg2:#11111e;--ink:#d4d6e8;--ink2:#8a8caa;
  --violet:#6c5cff;--cyan:#3ed8e6;--amber:#ffb44a;--line:rgba(124,236,255,.18);
}
body{margin:0;background:radial-gradient(ellipse 80% 50% at 20% 0%,#161630 0,transparent 60%),radial-gradient(ellipse 60% 50% at 100% 30%,#1a1430 0,transparent 55%),var(--bg);color:var(--ink);font:15px/1.7 -apple-system,"Segoe UI",system-ui,sans-serif;letter-spacing:.01em}
@media(min-width:1024px){body{padding-left:220px}
.topbar{position:fixed;top:0;left:0;width:220px;height:100vh;overflow-y:auto;padding:28px 22px;background:linear-gradient(180deg,rgba(18,18,32,.92),rgba(12,12,24,.96));border-right:1px solid var(--line);backdrop-filter:blur(20px)}
.brand{font-size:19px;font-weight:800;letter-spacing:.02em;background:linear-gradient(120deg,var(--cyan),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;margin:0 0 4px}
.nav{margin:24px 0;display:flex;flex-direction:column;gap:2px}
.nav a{display:block;padding:9px 12px;color:var(--ink2);text-decoration:none;font-size:13.5px;border-radius:9px;border-left:2px solid transparent;transition:.2s}
.nav a:hover{color:var(--ink);background:rgba(124,236,255,.06);border-left-color:var(--cyan)}
.nav a:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
}
@media(max-width:1023px){
.topbar{position:sticky;top:0;z-index:50;padding:14px 18px;background:rgba(12,12,24,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.brand{font-size:16px;font-weight:800;margin:0}
.brand::after{content:"· 第三方知识站";font-size:10px;color:var(--ink2);font-weight:400;margin-left:6px}
.nav{margin:0;gap:4px;flex-wrap:wrap}
.nav a{padding:5px 10px;font-size:12px;color:var(--ink2);text-decoration:none;border-radius:6px;background:rgba(255,255,255,.03)}
.nav a:hover{color:var(--ink);background:rgba(124,236,255,.1)}
}
.hero{margin:0 auto;padding:32px 0 20px;max-width:1180px;display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:stretch}
.hero-art{min-height:280px;border-radius:18px;background:linear-gradient(135deg,rgba(108,92,255,.28),rgba(62,216,230,.18) 50%,rgba(255,180,74,.1));border:1px solid var(--line);position:relative;box-shadow:inset 0 1px 0 rgba(255,255,255,.05),0 8px 32px rgba(108,92,255,.15)}
.hero-art::after{content:"虎牙直播网页版 · 知识观察首图";position:absolute;inset:auto 16px 14px;font-size:11px;color:var(--ink2);letter-spacing:.05em}
.hero-copy{display:flex;flex-direction:column;justify-content:center}
.hero-copy .eyebrow{font-size:11px;color:var(--amber);letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px}
.hero-copy h1{font-size:30px;line-height:1.2;margin:0 0 12px;font-weight:800;letter-spacing:-.01em}
.hero-copy p{color:var(--ink2);font-size:14px;margin:0 0 16px}
.section{max-width:1180px;margin:0 auto;padding:28px 0}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:14px;padding:20px;backdrop-filter:blur(12px);transition:.25s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;border-radius:14px;background:linear-gradient(135deg,rgba(108,92,255,.08),transparent 60%);opacity:0;transition:.3s;pointer-events:none}
.card:hover{transform:translateY(-3px);border-color:rgba(124,236,255,.4);box-shadow:0 12px 40px rgba(108,92,255,.2)}
.card:hover::before{opacity:1}
.card h3{font-size:15px;margin:0 0 8px;font-weight:700}
.card p{font-size:13px;color:var(--ink2);margin:0 0 10px;line-height:1.55}
.card .date{font-size:11px;color:var(--amber);letter-spacing:.05em}
.card a{color:inherit;text-decoration:none}
.article{max-width:820px;margin:0 auto;padding:40px 0 60px}
.article-body{background:rgba(255,255,255,.02);border:1px solid var(--line);border-radius:18px;padding:36px 40px;backdrop-filter:blur(12px)}
.article-body h2{font-size:18px;margin:28px 0 12px;font-weight:700}
.article-body h2:first-child{margin-top:0}
.article-body p{margin:0 0 18px;font-size:15.5px;line-height:1.78}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;color:var(--ink)}
.article-body li{margin:6px 0;font-size:14.5px;line-height:1.65}
.article-body blockquote{margin:18px 0;padding:14px 18px;border-left:3px solid var(--amber);background:rgba(255,180,74,.06);border-radius:0 8px 8px 0;color:var(--ink)}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:13.5px}
.article-body th,.article-body td{padding:9px 12px;border:1px solid var(--line);text-align:left}
.article-body th{background:rgba(108,92,255,.1);font-weight:600}
.article-body a{color:var(--cyan);text-decoration:underline;text-decoration-color:rgba(62,216,230,.4);text-underline-offset:3px}
.article-body a:hover{color:var(--amber);text-decoration-color:var(--amber)}
.lead{font-size:17px;line-height:1.7;color:var(--ink);font-weight:500;border-left:2px solid var(--violet);padding-left:16px;margin:0 0 24px}
.button{display:inline-flex;align-items:center;gap:6px;padding:10px 22px;background:linear-gradient(120deg,var(--violet),var(--cyan));color:#fff;border:none;border-radius:10px;font-size:13.5px;font-weight:600;text-decoration:none;cursor:pointer;transition:.2s}
.button:hover{box-shadow:0 6px 24px rgba(108,92,255,.4);transform:translateY(-1px)}
.button:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
.button.ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}
.button.ghost:hover{border-color:var(--cyan);background:rgba(124,236,255,.05)}
footer{max-width:1180px;margin:40px auto 0;padding:32px 0;border-top:1px solid var(--line);color:var(--ink2);font-size:12px;line-height:1.8}
footer b{color:var(--amber);font-weight:500}
@media(max-width:767px){
.hero{grid-template-columns:1fr;gap:18px;padding:20px 16px 12px}
.hero-art{min-height:170px}
.hero-copy h1{font-size:23px}
.hero-copy p{font-size:13px}
.section{padding:22px 16px}
.cards{grid-template-columns:1fr;gap:12px}
.card{padding:16px}
.article{padding:20px 16px 40px}
.article-body{padding:22px 18px}
.article-body p{font-size:14.5px;line-height:1.75}
.lead{font-size:15px;padding-left:12px}
.topbar{padding:12px 14px}
.nav{overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch}
.nav a{white-space:nowrap;padding:5px 9px;font-size:11.5px}
footer{padding:24px 16px}
}
@media(min-width:768px) and (max-width:1023px){
.hero{grid-template-columns:1fr 1fr;gap:22px;padding:24px 0 16px}
.cards{grid-template-columns:repeat(2,1fr)}
}