:root{
  --bg:#f4f8ff;
  --bg2:#eef7ff;
  --text:#102033;
  --muted:#66758c;
  --line:rgba(148,163,184,.26);
  --glass:rgba(255,255,255,.72);
  --glass-strong:rgba(255,255,255,.88);
  --blue:#2f74ff;
  --cyan:#38bdf8;
  --green:#16a34a;
  --red:#ef4444;
  --orange:#f97316;
  --shadow:0 22px 60px rgba(47,116,255,.13), inset 0 1px 0 rgba(255,255,255,.75);
  --shadow2:0 12px 28px rgba(15,23,42,.08);
  --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;background:radial-gradient(circle at 8% 8%,rgba(125,211,252,.38),transparent 32%),radial-gradient(circle at 88% 12%,rgba(59,130,246,.24),transparent 34%),linear-gradient(180deg,var(--bg),#fff 56%,var(--bg2));min-height:100vh;line-height:1.7;overflow-x:hidden}
body:before,body:after{content:"";position:fixed;z-index:-1;border-radius:999px;filter:blur(4px);pointer-events:none}body:before{width:360px;height:360px;right:-120px;top:120px;background:rgba(147,197,253,.35)}body:after{width:280px;height:280px;left:-90px;bottom:80px;background:rgba(186,230,253,.42)}
a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.container{width:min(1180px,calc(100% - 36px));margin:0 auto}.muted{color:var(--muted)}.eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:900;letter-spacing:.12em;text-transform:uppercase;color:#1d6cff;background:rgba(47,116,255,.1);border:1px solid rgba(47,116,255,.12);border-radius:999px;padding:5px 10px}.glass-panel,.card,.form{background:linear-gradient(145deg,var(--glass-strong),rgba(255,255,255,.58));border:1px solid rgba(255,255,255,.76);box-shadow:var(--shadow);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);position:relative}.glass-panel:before,.card:before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:linear-gradient(135deg,rgba(255,255,255,.8),transparent 36%,rgba(125,211,252,.12));opacity:.8}.site-header{position:sticky;top:0;z-index:60;background:rgba(244,248,255,.76);border-bottom:1px solid rgba(226,232,240,.7);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}.nav-wrap{min-height:76px;display:flex;align-items:center;gap:18px}.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:950;white-space:nowrap}.logo-mark{width:38px;height:38px;border-radius:14px;background:linear-gradient(135deg,#2f74ff,#7dd3fc);color:#fff;display:grid;place-items:center;box-shadow:0 14px 32px rgba(47,116,255,.28)}.site-logo-img{height:38px;width:auto;max-width:150px;object-fit:contain}.nav{display:flex;align-items:center;gap:5px;margin-left:auto}.nav a,.user-nav a{font-size:14px;font-weight:800;color:#314156;border-radius:999px;padding:9px 12px}.nav a:hover,.user-nav a:hover{background:rgba(47,116,255,.09);color:var(--blue)}.user-nav{display:flex;align-items:center;gap:6px}.nav-toggle{display:none;border:0;background:rgba(255,255,255,.8);border-radius:12px;padding:8px 11px;font-size:20px;color:#20304a}.btn,button,.button{border:0;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;border-radius:14px;padding:11px 18px;font-weight:900;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;box-shadow:0 12px 28px rgba(47,116,255,.22);transition:transform .18s ease,box-shadow .18s ease}.btn:hover,button:hover,.button:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(47,116,255,.28)}.btn.small{padding:8px 12px;font-size:13px}.btn.block{width:100%;margin-top:10px}.btn.ghost,.btn.gray,.btn.secondary{background:rgba(255,255,255,.7);color:#2350a6;border:1px solid rgba(47,116,255,.18);box-shadow:none}.btn.red{background:#ef4444}.btn.green{background:#16a34a}.alert{margin:14px auto 0;padding:13px 16px;border-radius:16px;font-weight:800;box-shadow:var(--shadow2);border:1px solid rgba(255,255,255,.8);background:rgba(255,255,255,.85)}.alert.success{color:#166534}.alert.error{color:#be123c}.hero{padding:56px 0 34px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:24px;align-items:stretch}.hero-copy,.banner-box{border-radius:32px;padding:34px;overflow:hidden}.hero h1{font-size:clamp(36px,5vw,64px);line-height:1.05;margin:16px 0 18px;letter-spacing:-.04em}.hero p{font-size:18px;color:#4b5d75;margin:0 0 24px}.search-box{display:flex;gap:10px;background:rgba(255,255,255,.74);border:1px solid rgba(203,213,225,.7);border-radius:18px;padding:8px;box-shadow:inset 0 1px 0 rgba(255,255,255,.8)}.search-box input{flex:1;border:0;background:transparent;outline:none;padding:0 10px;min-width:0;font-size:15px;color:var(--text)}.search-box button{white-space:nowrap}.notice{margin-top:16px;padding:12px 14px;border-radius:16px;background:rgba(47,116,255,.08);color:#1d4ed8;font-weight:800}.banner-box{display:grid;gap:12px}.banner-item{min-height:112px;border-radius:24px;padding:20px;overflow:hidden;background:linear-gradient(135deg,rgba(47,116,255,.14),rgba(125,211,252,.18));border:1px solid rgba(255,255,255,.74);position:relative;box-shadow:inset 0 1px 0 rgba(255,255,255,.8)}.banner-item img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.22}.banner-item strong,.banner-item span{position:relative;z-index:1;display:block}.banner-item strong{font-size:20px;font-weight:950}.banner-item span{color:#4d5f78;margin-top:8px}.section{padding:34px 0 54px}.page-hero-section{padding-top:42px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:0 0 20px}.section-title h2{margin:4px 0 0;font-size:30px;letter-spacing:-.03em}.section-title a{color:#1d6cff;font-weight:900}.grid{display:grid;gap:20px}.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{border-radius:var(--radius);padding:22px;transition:transform .2s ease,box-shadow .2s ease}.card:hover{transform:translateY(-4px);box-shadow:0 28px 70px rgba(47,116,255,.16),inset 0 1px 0 rgba(255,255,255,.8)}.resource-card{display:grid;grid-template-columns:104px minmax(0,1fr);gap:16px;min-height:150px}.resource-card h3{margin:0 0 8px;font-size:19px;line-height:1.35}.resource-card p{margin:0 0 12px}.cover{height:106px;border-radius:18px;background:linear-gradient(135deg,#eaf3ff,#d9efff);border:1px solid rgba(255,255,255,.8);display:grid;place-items:center;color:#1d6cff;font-weight:950;overflow:hidden;box-shadow:inset 0 1px 0 rgba(255,255,255,.9)}.cover img{width:100%;height:100%;object-fit:cover}.cover span{font-size:22px}.meta-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.tag,.free,.price{display:inline-flex;align-items:center;border-radius:999px;padding:4px 9px;font-size:12px;font-weight:900}.tag{background:rgba(47,116,255,.09);color:#1d4ed8;border:1px solid rgba(47,116,255,.12)}.tag.active{background:#2f74ff;color:white}.vip-tag{background:rgba(124,58,237,.1);color:#6d28d9}.free{background:rgba(22,163,74,.1);color:var(--green)}.price{background:rgba(249,115,22,.11);color:var(--orange)}.big-price{font-size:34px;font-weight:950}.empty{padding:28px;border-radius:24px;text-align:center;color:#64748b;background:rgba(255,255,255,.7);border:1px dashed rgba(148,163,184,.45)}.cat-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0 22px}.topic-hero,.search-panel{border-radius:30px;padding:30px;margin-bottom:24px}.topic-hero h1,.search-panel h1{font-size:42px;line-height:1.1;margin:12px 0}.topic-card .cover{width:100%;height:160px;margin-bottom:14px}.detail{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px;align-items:start}.detail-main h1{font-size:38px;line-height:1.15;margin:12px 0}.detail-subtitle{font-size:17px}.detail-head{display:flex;gap:8px;flex-wrap:wrap}.detail-cover{width:100%;max-height:460px;object-fit:cover;border-radius:22px;margin:20px 0;border:1px solid rgba(255,255,255,.75);box-shadow:var(--shadow2)}.content{color:#35445b}.preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.preview-grid img{width:100%;height:150px;object-fit:cover;border-radius:16px;border:1px solid rgba(255,255,255,.8)}.file-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}.file-list li{padding:12px 14px;border-radius:16px;background:rgba(248,250,252,.78);border:1px solid rgba(226,232,240,.68);display:flex;justify-content:space-between;gap:12px}.detail-side{position:sticky;top:98px}.info-list{display:grid;gap:10px;margin:15px 0}.info-list p{margin:0;padding:12px;border-radius:15px;background:rgba(248,250,252,.78);display:flex;justify-content:space-between;gap:10px}.info-list span{color:var(--muted)}.auth-section{padding-top:58px}.auth-container,.pay-container{max-width:620px}.form{border-radius:28px;padding:28px}.form-row{margin-bottom:16px}.form-row label{display:block;margin-bottom:7px;font-weight:900}.input,textarea,select{width:100%;padding:12px 13px;border:1px solid rgba(203,213,225,.75);border-radius:14px;background:rgba(255,255,255,.76);outline:none;color:var(--text);font-size:15px}textarea{min-height:120px;resize:vertical}.pay-panel{padding:15px;border-radius:18px;background:rgba(47,116,255,.07);border:1px solid rgba(47,116,255,.12);margin:16px 0}.qr-box{text-align:center}.qr-box img{width:230px;height:230px;margin:0 auto 12px;background:#fff;padding:10px;border-radius:18px;border:1px solid rgba(203,213,225,.8)}.user-layout{display:grid;gap:22px}.table-card{overflow:hidden}.table-scroll{overflow:auto}.table{width:100%;border-collapse:collapse;min-width:720px}.table th,.table td{border-bottom:1px solid rgba(226,232,240,.75);padding:13px 12px;text-align:left;vertical-align:top}.table th{color:#475569;background:rgba(248,250,252,.7)}.site-footer{margin-top:30px;padding:34px 0;border-top:1px solid rgba(226,232,240,.7);background:rgba(255,255,255,.42);backdrop-filter:blur(14px)}.footer-grid{display:flex;justify-content:space-between;gap:24px;color:#526178}.footer-grid strong{font-size:18px;color:var(--text)}.footer-grid p{margin:6px 0}.footer-links{text-align:right}
@media(max-width:960px){.nav-toggle{display:block;margin-left:auto}.nav{display:none;position:absolute;left:18px;right:18px;top:76px;flex-direction:column;align-items:stretch;background:rgba(255,255,255,.94);border:1px solid rgba(226,232,240,.8);border-radius:20px;padding:12px;box-shadow:var(--shadow2)}.nav.open{display:flex}.user-nav{margin-left:0}.hero-grid,.detail{grid-template-columns:1fr}.detail-side{position:static}.grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding-top:32px}.hero-copy,.banner-box{padding:24px}.footer-grid{display:block}.footer-links{text-align:left}}
@media(max-width:640px){.container{width:min(100% - 24px,1180px)}.nav-wrap{min-height:66px}.user-nav a:not(.btn){display:none}.hero h1{font-size:36px}.topic-hero h1,.search-panel h1{font-size:32px}.search-box{display:grid}.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}.resource-card{grid-template-columns:86px minmax(0,1fr);padding:16px}.cover{height:92px}.preview-grid{grid-template-columns:1fr}.file-list li{display:block}.section-title{align-items:flex-start;display:block}.section-title a{display:inline-block;margin-top:8px}.card,.form{padding:18px;border-radius:20px}.detail-main h1{font-size:29px}}