:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-card: #ffffff;
  --border: #eceef1;
  --text: #1a1a2e;
  --text-soft: #6b7280;
  --primary: #4f46e5;
  --primary-soft: #eef2ff;
  --primary-hover: #4338ca;
  --accent: #06b6d4;
  --free: #16a34a;
  --freemium: #d97706;
  --paid: #dc2626;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 8px 24px rgba(0,0,0,.04);
  --radius: 14px;
  --maxw: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: 22px;
  height: 64px;
}
.logo { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 20px; }
.logo .mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; display: grid; place-items: center; font-size: 18px;
}
.nav { display: flex; gap: 4px; margin-left: 8px; }
.nav a {
  padding: 8px 14px; border-radius: 9px; color: var(--text-soft);
  font-size: 15px; font-weight: 500; transition: .15s;
}
.nav a:hover, .nav a.active { background: var(--primary-soft); color: var(--primary); }
.header-spacer { flex: 1; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px; border-radius: 10px; font-weight: 600; font-size: 14px;
  cursor: pointer; border: 1px solid transparent; transition: .15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-ghost { background: #fff; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- Hero ---------- */
.hero {
  background: radial-gradient(1200px 400px at 50% -120px, var(--primary-soft), transparent);
  padding: 56px 0 40px; text-align: center;
}
.hero h1 { font-size: 40px; line-height: 1.25; letter-spacing: -.5px; }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { color: var(--text-soft); font-size: 17px; margin: 14px auto 0; max-width: 620px; }
.search-box {
  margin: 26px auto 0; max-width: 620px;
  display: flex; align-items: center; gap: 8px;
  background: #fff; border: 1.5px solid var(--border);
  border-radius: 14px; padding: 8px 8px 8px 18px; box-shadow: var(--shadow);
  transition: .15s;
}
.search-box:focus-within { border-color: var(--primary); }
.search-box input {
  flex: 1; border: none; outline: none; font-size: 16px; background: transparent; color: var(--text);
}
.search-box .btn { white-space: nowrap; }

/* ---------- 统计条 ---------- */
.stats {
  display: flex; justify-content: center; gap: 48px; flex-wrap: wrap;
  margin: 30px auto 0; padding: 18px 0; border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border); max-width: 720px;
}
.stat { text-align: center; }
.stat b { font-size: 26px; color: var(--primary); }
.stat span { display: block; color: var(--text-soft); font-size: 13px; }

/* ---------- 分类标签 ---------- */
.section { padding: 44px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 20px; }
.section-head h2 { font-size: 24px; letter-spacing: -.3px; }
.section-head a { color: var(--primary); font-size: 14px; font-weight: 600; }

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 14px; border-radius: 999px; background: var(--bg-soft);
  border: 1px solid var(--border); font-size: 14px; color: var(--text);
  cursor: pointer; transition: .15s; font-weight: 500;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.chip .cnt { font-size: 12px; opacity: .7; }

/* ---------- 工具网格 ---------- */
.grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; cursor: pointer;
  transition: .18s; display: flex; flex-direction: column; gap: 12px;
  position: relative;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #dfe3ea; }
.card-top { display: flex; align-items: center; gap: 12px; }
.logo-badge {
  width: 46px; height: 46px; border-radius: 12px; flex-shrink: 0;
  display: grid; place-items: center; font-weight: 800; font-size: 18px; color: #fff;
}
.card h3 { font-size: 16px; font-weight: 700; }
.card .cat-tag { font-size: 12px; color: var(--text-soft); }
.card .desc { font-size: 13.5px; color: var(--text-soft); min-height: 40px; }
.card-foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; }
.card-meta { display: flex; gap: 14px; font-size: 12px; color: var(--text-soft); }
.card-meta span { display: inline-flex; align-items: center; gap: 4px; }

.badge {
  font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 999px;
}
.badge.free { background: #dcfce7; color: var(--free); }
.badge.freemium { background: #fef3c7; color: var(--freemium); }
.badge.paid { background: #fee2e2; color: var(--paid); }

.featured-flag {
  position: absolute; top: 12px; right: 12px;
  font-size: 10px; font-weight: 700; color: #fff; background: var(--accent);
  padding: 3px 8px; border-radius: 999px;
}

/* ---------- 资讯 ---------- */
.news-list { display: flex; flex-direction: column; gap: 12px; }
.news-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 16px; border: 1px solid var(--border); border-radius: 12px; background: #fff;
  transition: .15s;
}
.news-item:hover { border-color: var(--primary); }
.news-date { font-size: 12px; color: var(--text-soft); white-space: nowrap; padding-top: 2px; }
.news-title { font-weight: 600; font-size: 15px; }
.news-src { font-size: 12px; color: var(--primary); margin-top: 2px; }

/* ---------- 免费分类 ---------- */
.free-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap: 14px; }
.free-card {
  border: 1px solid var(--border); border-radius: 12px; padding: 16px;
  background: linear-gradient(180deg,#fff,var(--bg-soft)); transition: .15s; cursor: pointer;
}
.free-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.free-card .ic { font-size: 24px; }
.free-card h4 { margin: 8px 0 4px; font-size: 15px; }
.free-card p { font-size: 12px; color: var(--text-soft); }

/* ---------- 列表页控件 ---------- */
.toolbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-bottom: 22px;
}
.toolbar .search-box { margin: 0; max-width: none; flex: 1; min-width: 240px; }
.select {
  padding: 10px 14px; border-radius: 10px; border: 1.5px solid var(--border);
  background: #fff; font-size: 14px; color: var(--text); cursor: pointer; outline: none;
}
.select:focus { border-color: var(--primary); }
.result-count { color: var(--text-soft); font-size: 14px; }

/* ---------- 详情弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(15,18,35,.55);
  display: none; align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
.modal-mask.show { display: flex; }
.modal {
  background: #fff; border-radius: 18px; max-width: 480px; width: 100%;
  padding: 26px; box-shadow: 0 20px 60px rgba(0,0,0,.3); position: relative;
}
.modal .close {
  position: absolute; top: 16px; right: 18px; font-size: 22px; cursor: pointer;
  color: var(--text-soft); border: none; background: none;
}
.modal-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.modal-head .logo-badge { width: 56px; height: 56px; font-size: 22px; }
.modal h3 { font-size: 20px; }
.modal .cat-tag { color: var(--text-soft); font-size: 13px; }
.modal .desc { color: var(--text-soft); font-size: 14.5px; margin: 6px 0 16px; }
.modal .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.modal .tag { font-size: 12px; background: var(--bg-soft); border: 1px solid var(--border); padding: 4px 10px; border-radius: 999px; color: var(--text-soft); }
.modal-foot { display: flex; gap: 10px; }
.modal-foot .btn { flex: 1; justify-content: center; }
.modal-stats { display: flex; gap: 22px; margin: 4px 0 16px; color: var(--text-soft); font-size: 13px; }
.modal-stats b { color: var(--text); display: block; font-size: 16px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-soft); border-top: 1px solid var(--border); padding: 40px 0 30px; margin-top: 30px; }
.footer-grid { display: flex; flex-wrap: wrap; gap: 30px; justify-content: space-between; }
.footer h5 { font-size: 14px; margin-bottom: 12px; }
.footer a { display: block; color: var(--text-soft); font-size: 13.5px; margin-bottom: 7px; }
.footer a:hover { color: var(--primary); }
.footer .copy { text-align: center; color: var(--text-soft); font-size: 13px; margin-top: 28px; }

.empty { text-align: center; color: var(--text-soft); padding: 60px 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .nav { display: none; }
  .hero h1 { font-size: 30px; }
  .stats { gap: 28px; }
  .section { padding: 32px 0; }
}