* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #f7f9fb;
  --hero-bg-start: #eaf3fb;
  --hero-bg-end: #f7f9fb;
  --card: #ffffff;
  --ink: #1f2933;
  --sub: #6b7885;
  --line: #e6ebf0;
  --accent: #2f7fd1;
  --accent-soft: #eaf3fb;
  --warm: #f5a25d;
  --shadow: 0 2px 12px rgba(31,41,51,.06);
  --shadow-hover: 0 6px 20px rgba(47,127,209,.12);
  --shadow-card-hover: 0 8px 24px rgba(47,127,209,.14);
  --badge-free-bg: #e8f6ee;
  --badge-free-fg: #2a9d5c;
  --badge-paid-bg: #fdf0e6;
  --star-bg: #fff8f0;
  --footer-bottom-bg: rgba(0,0,0,.02);
  --footer-links: #9aa5b1;
}
[data-theme="dark"] {
  --bg: #0f1419;
  --hero-bg-start: #1a2332;
  --hero-bg-end: #0f1419;
  --card: #1a1f26;
  --ink: #e6e8eb;
  --sub: #8a94a3;
  --line: #2a3038;
  --accent: #5ba3e8;
  --accent-soft: #1e2a3a;
  --warm: #f5a25d;
  --shadow: 0 2px 12px rgba(0,0,0,.3);
  --shadow-hover: 0 6px 20px rgba(91,163,232,.15);
  --shadow-card-hover: 0 8px 24px rgba(91,163,232,.18);
  --badge-free-bg: #1e3226;
  --badge-free-fg: #5cc084;
  --badge-paid-bg: #3a2818;
  --star-bg: #2a2318;
  --footer-bottom-bg: rgba(0,0,0,.25);
  --footer-links: #6a7280;
}
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--ink); line-height: 1.6;
  transition: background .25s, color .25s;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--hero-bg-start) 0%, var(--hero-bg-end) 60%);
  padding: 48px 0 24px; border-bottom: 1px solid var(--line);
}
.hero .wrap {
  background: linear-gradient(135deg, var(--accent-soft) 0%, var(--card) 100%);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 16px;
  padding: 32px 36px;
  box-shadow: var(--shadow);
}
.hero h1 { font-size: 32px; letter-spacing: 1px; color: var(--ink); font-weight: 700; }
.slogan { color: var(--ink); margin-top: 10px; font-size: 16px; font-weight: 500; }
.subnote { color: var(--sub); margin-top: 6px; font-size: 13px; }
.search-box { margin: 24px 0 20px; }
#search {
  width: 100%; padding: 14px 18px; font-size: 15px;
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--card); outline: none; transition: .2s;
}
#search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* 分类导航 */
.cat-nav { display: flex; flex-wrap: wrap; gap: 8px; }
.cat-link {
  text-decoration: none; color: var(--sub); font-size: 14px;
  padding: 6px 14px; background: var(--card); border: 1px solid var(--line);
  border-radius: 20px; transition: .2s;
}
.cat-link:hover { color: var(--accent); border-color: var(--accent); }

/* 分类区块 */
.cat-section { margin: 36px 0; scroll-margin-top: 20px; }
.cat-title {
  font-size: 20px; margin-bottom: 16px; display: flex;
  align-items: center; gap: 10px;
}
.count {
  font-size: 12px; color: var(--sub); background: var(--accent-soft);
  padding: 2px 8px; border-radius: 10px; font-weight: normal;
}
.cat-desc { color: var(--sub); font-size: 13px; margin: -8px 0 16px; }
.subgroup { margin: 28px 0; }
.subgroup-header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px; margin-bottom: 8px;
}
.subgroup-title {
  font-size: 15px; color: var(--ink);
  display: flex; align-items: center; gap: 8px;
  padding-left: 10px; border-left: 3px solid var(--accent);
}
.sub-count {
  font-size: 11px; color: var(--sub); background: var(--accent-soft);
  padding: 1px 7px; border-radius: 9px; font-weight: normal;
}
.subgroup-source {
  color: var(--sub); font-size: 12px; margin: 0 0 14px 13px;
}
/* 排序切换按钮 */
.sort-tabs { display: flex; gap: 4px; }
.sort-btn {
  font-size: 12.5px; color: var(--sub); cursor: pointer;
  padding: 4px 12px; border: 1px solid var(--line);
  background: var(--card); border-radius: 8px; transition: .15s;
}
.sort-btn:hover { color: var(--accent); border-color: var(--accent); }
.sort-btn.active {
  color: #fff; background: var(--accent); border-color: var(--accent);
}
/* 卡片右下角：星标 + 实测 */
.foot-right { display: flex; align-items: center; gap: 10px; }
.star-btn {
  display: inline-flex; align-items: center; gap: 4px;
  background: none; border: 1px solid var(--line); border-radius: 8px;
  padding: 3px 10px; cursor: pointer; font-size: 13px;
  color: var(--sub); transition: .2s;
}
.star-btn:hover { border-color: var(--warm); color: var(--warm); }
.star-btn.starred { border-color: var(--warm); color: var(--warm); background: var(--star-bg); }
.star-icon { font-size: 14px; }
.star-num { font-size: 12px; }
.cat-empty {
  color: var(--sub); font-size: 13.5px; text-align: center;
  padding: 28px 20px; background: var(--card); border: 1px dashed var(--line);
  border-radius: 14px;
}

/* 卡片网格 */
.grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.card {
  display: block; text-decoration: none; color: inherit;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 18px; box-shadow: var(--shadow);
  transition: .2s;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow-hover); }
.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.card-name { font-size: 16px; font-weight: 600; }
.badge { font-size: 11px; padding: 2px 8px; border-radius: 8px; }
.badge.free { background: var(--badge-free-bg); color: var(--badge-free-fg); }
.badge.paid { background: var(--badge-paid-bg); color: var(--warm); }
.card-desc { color: var(--sub); font-size: 13.5px; min-height: 42px; }
.card-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; }
.tag { font-size: 12px; color: var(--accent); background: var(--accent-soft); padding: 2px 10px; border-radius: 8px; }
.note { font-size: 12px; color: var(--warm); cursor: help; }

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

/* 首页：模块入口卡片 */
.module-grid {
  display: grid; gap: 16px; margin: 32px 0;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.module-card {
  display: flex; align-items: center; gap: 16px;
  text-decoration: none; color: inherit;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 22px; box-shadow: var(--shadow);
  transition: .2s;
}
.module-card:hover {
  transform: translateY(-3px); border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
}
.module-icon {
  font-size: 34px; flex-shrink: 0; width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft); border-radius: 14px;
}
.module-info { flex: 1; min-width: 0; }
.module-name { font-size: 18px; margin-bottom: 4px; }
.module-desc { color: var(--sub); font-size: 13px; line-height: 1.5; }
.module-count {
  flex-shrink: 0; font-size: 12px; color: var(--accent);
  background: var(--accent-soft); padding: 4px 10px; border-radius: 10px;
}

/* 子分类标签 */
.subgroup-tags {
  display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px;
}
.subgroup-link {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 10px; border-radius: 12px;
  cursor: pointer; transition: .2s;
  text-decoration: none;
}
.subgroup-link:hover {
  background: var(--accent); color: #fff;
}
.subgroup-count {
  font-size: 11px; opacity: .8;
}
.subgroup-more {
  font-size: 12px; color: var(--sub);
  padding: 3px 8px;
}

/* 更多按钮 */
.more-btn {
  display: block; text-align: center;
  margin: 16px 0 8px;
  padding: 12px 20px;
  background: var(--card);
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--accent);
  font-size: 14px;
  text-decoration: none;
  transition: .2s;
}
.more-btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* 模块页头部 */
.hero-sub { padding: 28px 0 20px; }
.hero-sub .wrap {
  background: linear-gradient(135deg, var(--accent-soft) 0%, var(--card) 100%);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 14px;
  padding: 24px 28px;
  margin-top: 8px;
  margin-bottom: 8px;
}
.back-link {
  display: inline-block; color: var(--sub); text-decoration: none;
  font-size: 14px; margin-bottom: 14px; transition: .2s;
}
.back-link:hover { color: var(--accent); }
.cat-page-title { font-size: 26px; letter-spacing: 1px; color: var(--ink); font-weight: 600; }

/* 页脚 */
.footer { border-top: 1px solid var(--line); padding: 0; margin-top: 40px; text-align: center; }
.footer-main {
  display: flex; justify-content: center; align-items: flex-start; gap: 60px;
  padding: 32px 0; flex-wrap: wrap;
}
.footer-brand { text-align: left; }
.footer-logo { font-size: 20px; font-weight: 700; color: var(--fg); }
.footer-slogan { color: var(--sub); font-size: 13px; margin-top: 6px; }

/* 页脚社群卡片：小红书 + QQ 并排 */
.footer-social {
  display: flex; gap: 16px; flex-wrap: wrap; justify-content: center;
}
.footer-xhs, .footer-qq {
  border-radius: 12px; padding: 16px 22px; text-align: center;
  min-width: 220px; color: #fff;
}
.footer-xhs {
  background: linear-gradient(135deg, #ff2442 0%, #ff6b81 100%);
}
.footer-qq {
  background: linear-gradient(135deg, #1a7bd6 0%, #4aa3ef 100%);
}
.footer-social-title { font-size: 13px; font-weight: 600; margin-bottom: 4px; opacity: .95; }
.footer-social-account {
  font-size: 17px; font-weight: 700; margin: 6px 0;
  letter-spacing: 1px; line-height: 1.3;
}
.footer-social-hint { font-size: 12px; opacity: .85; margin-top: 6px; }
.footer-placeholder {
  font-size: 13px; font-weight: 500; opacity: .7; font-style: italic;
  letter-spacing: 0;
}
.footer-qq-qrcode {
  display: block; width: 96px; height: 96px; margin: 8px auto;
  border-radius: 8px; background: #fff; padding: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--line); padding: 16px 0;
  background: var(--footer-bottom-bg);
}
.footer-disclaimer { color: var(--sub); font-size: 12px; margin-bottom: 6px; }
.footer-links { color: var(--footer-links); font-size: 12px; }
.footer-links a { color: var(--footer-links); text-decoration: none; }
.footer-links a:hover { color: var(--accent); text-decoration: underline; }
.footer-sep { margin: 0 8px; opacity: .4; }

/* 主题切换按钮：右上角浮动 */
.theme-toggle {
  position: fixed; top: 16px; right: 20px; z-index: 100;
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--card);
  color: var(--ink); font-size: 18px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow); transition: .2s;
}
.theme-toggle:hover {
  border-color: var(--accent); transform: rotate(15deg);
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

@media (max-width: 600px) {
  .hero { padding: 32px 0 20px; }
  .hero h1 { font-size: 26px; }
  .grid { grid-template-columns: 1fr; }
  .theme-toggle { top: 12px; right: 12px; width: 36px; height: 36px; }
}