:root{
  --bg:#f6f7f9; --card:#ffffff; --text:#0f172a; --muted:#64748b;
  --border:#e6e8eb; --accent:#4f46e5; --accent2:#7c3aed; --soft:#f1f3f6;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",Helvetica,Arial,sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.topbar .wrap{display:flex;align-items:center;gap:16px;height:64px}
.brand{font-weight:800;font-size:20px;letter-spacing:-.3px}
.brand{color:var(--accent)}
.search{flex:1;max-width:420px;position:relative}
.search input{width:100%;height:40px;border:1px solid var(--border);background:var(--soft);border-radius:999px;padding:0 16px 0 40px;font-size:14px;outline:none}
.search input:focus{border-color:var(--accent);background:#fff}
.search::before{content:"🔍";position:absolute;left:14px;top:50%;transform:translateY(-50%);opacity:.5;font-size:14px}
.nav{display:flex;align-items:center;gap:18px;margin-left:auto;font-size:14px;color:var(--muted)}
.nav a:hover{color:var(--text)}
.nav a.admin{color:var(--accent);font-weight:600}

/* Hero */
.hero{text-align:center;padding:64px 0 40px}
.hero h1{font-size:44px;line-height:1.15;margin:0 0 12px;font-weight:800;letter-spacing:-1px}
.hero .sub{color:var(--muted);font-size:17px;max-width:620px;margin:0 auto 28px}
.stats{display:flex;justify-content:center;gap:48px;margin-bottom:32px}
.stats b{font-size:30px;display:block;font-weight:800}
.stats span{color:var(--muted);font-size:13px}
.hero-search{display:flex;max-width:560px;margin:0 auto;gap:10px}
.hero-search input{flex:1;height:52px;border:1px solid var(--border);border-radius:14px;padding:0 18px;font-size:16px;outline:none;box-shadow:var(--shadow)}
.hero-search input:focus{border-color:var(--accent)}
.hero-search .gobtn{display:flex;align-items:center;padding:0 26px;background:var(--accent);color:#fff;border-radius:14px;font-weight:600}
.hero-search.small{max-width:480px;margin:18px auto 0}
.hero-search.small input{height:44px;font-size:15px}

/* 区块 */
.block{padding:28px 0}
.block h2{font-size:22px;margin:0 0 18px;font-weight:700}
.empty{color:var(--muted);padding:30px 0}

/* 分类网格 */
.catgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.ccard{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;transition:.15s;box-shadow:var(--shadow)}
.ccard:hover{transform:translateY(-3px);border-color:var(--accent)}
.ccard .cico{font-size:26px}
.ccard .cname{font-weight:700;margin:8px 0 4px}
.ccard .cmeta{color:var(--muted);font-size:13px;line-height:1.45}

/* 工具网格 */
.tgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tcard{display:flex;gap:14px;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:16px;transition:.15s;box-shadow:var(--shadow)}
.tcard:hover{transform:translateY(-3px);border-color:var(--accent)}
.tlogo{flex:none;width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:20px}
.tinfo{flex:1;min-width:0}
.tname{font-weight:700;font-size:15px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.tname .ec{font-size:11px;font-weight:700;color:#b45309;background:#fef3c7;padding:2px 8px;border-radius:999px}
.tdesc{color:var(--muted);font-size:13px;margin:6px 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tscore{display:flex;align-items:center;gap:8px}
.tscore .bar{flex:1;height:6px;background:var(--soft);border-radius:999px;overflow:hidden;max-width:140px}
.tscore .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.tscore span{font-size:12px;color:var(--muted);font-weight:600}

/* 分类页头 */
.cathead{text-align:center;padding:40px 0 10px}
.cathead .cbig{font-size:46px}
.cathead h1{font-size:32px;margin:8px 0}
.cathead p{color:var(--muted);max-width:640px;margin:0 auto}

/* 工具详情 */
.toolhead{display:flex;gap:22px;align-items:center;padding:36px 0 8px}
.tlogo.big{width:88px;height:88px;font-size:38px;border-radius:20px}
.toolhead h1{font-size:30px;margin:0 0 10px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.toolhead .ec.big{font-size:12px}
.tscore.big{margin-bottom:14px}
.visit{display:inline-flex;align-items:center;background:var(--accent);color:#fff;padding:10px 20px;border-radius:12px;font-weight:600}
.visit:hover{opacity:.92}
.prose{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:var(--shadow)}
.prose h2{margin-top:0}

/* 页脚 */
.footer{background:#fff;border-top:1px solid var(--border);margin-top:40px;padding:40px 0 28px}
.fcols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
.fcols b{display:block;margin-bottom:10px}
.fcols a{color:var(--muted);display:block;font-size:14px;margin:4px 0}
.fcols a:hover{color:var(--accent)}
.fcols p{color:var(--muted);font-size:14px}
.copy{color:var(--muted);font-size:13px;margin-top:24px;text-align:center}

/* 响应式 */
@media(max-width:900px){.catgrid{grid-template-columns:repeat(2,1fr)}.tgrid{grid-template-columns:repeat(2,1fr)}.fcols{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.hero h1{font-size:32px}.stats{gap:24px}.tgrid{grid-template-columns:1fr}.nav{gap:12px}.nav a:not(.admin){display:none}.toolhead{flex-direction:column;text-align:center}}

/* 打赏按钮 + 弹窗 */
.donate-btn{border:none;background:#ffc439;color:#111;font-weight:600;padding:8px 14px;border-radius:8px;cursor:pointer;font-size:14px}
.donate-btn:hover{filter:brightness(1.05)}
.modal-overlay{position:fixed;inset:0;background:rgba(15,23,42,.55);display:none;align-items:center;justify-content:center;z-index:999}
.modal{background:#fff;color:#1f2937;width:min(420px,92vw);border-radius:14px;padding:24px;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.modal h3{margin:0 0 4px;font-size:20px}
.modal .sub{color:#6b7280;font-size:13px;margin:0 0 16px}
.modal-close{position:absolute;top:12px;right:14px;border:none;background:transparent;font-size:22px;line-height:1;cursor:pointer;color:#9ca3af}
.modal-close:hover{color:#111}
.amounts{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.amt-btn{border:1px solid #e5e7eb;background:#f9fafb;border-radius:8px;padding:8px 12px;cursor:pointer;font-size:14px;color:#111}
.amt-btn:hover{border-color:#ffc439}
.amt-btn.sel{background:#ffc439;border-color:#ffc439;font-weight:600}
.amt-custom{width:110px;border:1px solid #e5e7eb;border-radius:8px;padding:8px 10px;font-size:14px}
.paypal-box{min-height:46px}
.paypal-box .err{color:#dc2626;font-size:13px}
.donate-thanks{background:#ecfdf5;color:#047857;border:1px solid #a7f3d0;border-radius:8px;padding:12px;font-size:14px;margin-top:8px}