/* ==========================================================
   趣干SEO工具 - 主题样式 v3
   设计：浅色、蓝主色、卡片化、层次分明
   ========================================================== */
:root {
  --primary: #1a66b3;
  --primary-dark: #14538f;
  --primary-light: #eaf2fb;
  --accent: #2e9e5b;
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #232b38;
  --text-soft: #5b6675;
  --muted: #8a94a6;
  --border: #e6eaf0;
  --ok: #2e9e5b;
  --warn: #e0912a;
  --err: #d9534f;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(16, 32, 56, .06), 0 6px 18px rgba(16, 32, 56, .05);
  --shadow-hover: 0 4px 10px rgba(26, 102, 179, .10), 0 14px 32px rgba(16, 32, 56, .08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .15s; }
a:hover { color: var(--primary-dark); text-decoration: none; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); font-size: 13px; }
code { background: var(--primary-light); color: var(--primary-dark); padding: 1px 6px; border-radius: 4px; font-size: 13px; }

/* ---------------- 头部 ---------------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
  box-shadow: 0 1px 2px rgba(16, 32, 56, .04);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.logo { font-size: 20px; font-weight: 700; color: var(--primary); white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), #3d8ddd);
  color: #fff; font-size: 14px;
}
.main-nav { display: flex; gap: 2px; align-items: stretch; height: 100%; }
.main-nav > a, .nav-drop { display: flex; align-items: center; }
.main-nav > a { padding: 0 14px; border-radius: var(--radius-sm); color: var(--text); white-space: nowrap; }
.nav-drop { position: relative; }
.nav-cat { padding: 7px 12px; border-radius: var(--radius-sm); cursor: pointer; white-space: nowrap; color: var(--text); }
.nav-cat i { font-size: 10px; font-style: normal; color: var(--muted); margin-left: 3px; }
.nav-drop:hover .nav-cat, .active-parent .nav-cat { background: var(--primary-light); color: var(--primary); }
.main-nav > a:hover { background: var(--primary-light); }
.main-nav a.active { background: var(--primary); color: #fff; }
.nav-menu {
  display: none; position: absolute; top: 100%; left: 0; z-index: 60;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-hover); min-width: 172px; padding: 6px;
}
.nav-drop:hover .nav-menu { display: block; }
.nav-menu a { display: block; padding: 9px 12px; border-radius: var(--radius-sm); color: var(--text); white-space: nowrap; }
.nav-menu a:hover { background: var(--primary-light); }
.nav-menu a.active { background: var(--primary); color: #fff; }

/* ---------------- 面包屑 ---------------- */
.breadcrumb {
  padding: 14px 0 4px; font-size: 13px; color: var(--muted);
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.bc-sep { color: #c3cad6; }
.bc-current { color: var(--text-soft); font-weight: 600; }

/* ---------------- 首屏 ---------------- */
.hero {
  text-align: center; padding: 44px 24px 32px; margin: 12px 0 8px;
  background: linear-gradient(160deg, #ffffff 0%, #f2f7fd 60%, #e9f2fc 100%);
  border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow);
}
.hero h1 { font-size: 28px; line-height: 1.5; color: var(--primary-dark); margin-bottom: 10px; font-weight: 700; }
.hero .sub { color: var(--text-soft); margin-bottom: 26px; font-size: 15px; }
.search-box { display: flex; max-width: 660px; margin: 0 auto; }
.search-box input, .search-box select {
  flex: 1; height: 48px; border: 2px solid var(--primary); border-right: none;
  border-radius: var(--radius) 0 0 var(--radius); padding: 0 18px; font-size: 15px; outline: none; min-width: 0;
  background: #fff;
}
.search-box input:focus { box-shadow: 0 0 0 3px rgba(26,102,179,.12); }
.search-box select { flex: 0 0 auto; border: 2px solid var(--primary); border-right: 1px solid var(--border); border-radius: 0; }
.search-box button {
  height: 48px; padding: 0 30px; background: linear-gradient(135deg, var(--primary), #2b7bc9);
  color: #fff; border: none; border-radius: 0 var(--radius) var(--radius) 0; font-size: 16px; font-weight: 600; cursor: pointer;
  transition: filter .15s;
}
.search-box button:hover { filter: brightness(1.08); }
.search-box.small { max-width: 580px; margin: 18px auto 22px; }
.rank-form { max-width: 760px; }
.rank-form input { flex: 1 1 200px; }
.quick-tools { margin-top: 16px; font-size: 13px; color: var(--muted); }
.quick-tools a { margin: 0 8px; padding: 4px 10px; background: #fff; border: 1px solid var(--border); border-radius: 20px; }
.quick-tools a:hover { border-color: var(--primary); background: var(--primary-light); }

/* ---------------- 首页两栏 ---------------- */
.home-two-col { display: grid; grid-template-columns: 1fr 306px; gap: 20px; padding: 8px 0 24px; }
.cat-block { margin-bottom: 22px; }
.cat-block > h2 {
  font-size: 17px; padding: 4px 0 10px; margin-bottom: 14px;
  border-bottom: 2px solid var(--primary); display: inline-block; color: var(--text);
}
.cat-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(228px, 1fr)); gap: 12px; }
.tool-item {
  display: grid; grid-template-columns: 40px 1fr; grid-template-rows: auto auto;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; color: var(--text); transition: box-shadow .18s, border-color .18s, transform .18s;
}
.tool-item:hover { box-shadow: var(--shadow-hover); border-color: var(--primary); transform: translateY(-2px); }
.ti-icon { grid-row: 1 / 3; font-size: 26px; }
.ti-name { font-weight: 600; }
.ti-desc { color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.home-side { display: flex; flex-direction: column; gap: 16px; }
.side-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.side-card h3 { font-size: 15px; margin-bottom: 10px; color: var(--text); }
.hot-list { list-style: none; }
.hot-list li { display: flex; align-items: center; gap: 8px; padding: 7px 0; border-bottom: 1px dashed var(--border); }
.hot-list li:last-child { border-bottom: none; }
.hot-rank {
  flex: 0 0 20px; height: 20px; line-height: 20px; text-align: center; border-radius: 5px;
  background: #eef1f5; color: var(--muted); font-size: 12px;
}
.hot-rank.top { background: #fdecec; color: var(--err); font-weight: 700; }
.hot-list a { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hot-cnt { color: var(--muted); font-size: 12px; }
.side-stat { font-size: 15px; }
.side-stat b { color: var(--primary); font-size: 18px; }

/* ---------------- 页面标题 ---------------- */
.main-content { padding-bottom: 40px; min-height: 60vh; }
.page-title { text-align: center; font-size: 24px; padding: 16px 0 6px; color: var(--text); }
.page-sub { text-align: center; color: var(--muted); margin-bottom: 6px; font-size: 14px; }

/* ---------------- 面板 / 卡片 ---------------- */
.panel {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin: 16px 0; box-shadow: var(--shadow);
}
.panel h2, .panel h3 {
  font-size: 16px; margin: 16px 0 10px; color: var(--primary-dark);
  padding-left: 10px; border-left: 3px solid var(--primary); line-height: 1.4;
}
.panel h2:first-child, .panel h3:first-child { margin-top: 0; }
.panel.empty { text-align: center; color: var(--muted); padding: 44px 20px; }
.panel.empty h2 { border: none; padding: 0; color: var(--text); margin-bottom: 6px; }
.panel textarea {
  width: 100%; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px; font-size: 14px; margin-bottom: 12px; resize: vertical;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), #2b7bc9); color: #fff; border: none;
  border-radius: var(--radius-sm); height: 42px; padding: 0 26px; font-size: 15px; cursor: pointer;
  transition: filter .15s;
}
.btn-primary:hover { filter: brightness(1.08); }

/* ---------------- 表格 ---------------- */
.data-table { width: 100%; border-collapse: collapse; margin: 10px 0 16px; font-size: 13.5px; }
.data-table th, .data-table td { border-bottom: 1px solid var(--border); padding: 10px 12px; text-align: left; }
.data-table th { background: #f6f9fc; font-weight: 600; color: var(--text-soft); }
.data-table tbody tr:hover { background: #fafcff; }
.whois-pre {
  background: #f7f9fc; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 14px; white-space: pre-wrap; word-break: break-all; font-size: 13px;
  max-height: 460px; overflow: auto; line-height: 1.6;
}
.summary { margin: 8px 0; }
.tag {
  display: inline-block; padding: 3px 11px; border-radius: 20px; background: #eef1f5;
  margin: 3px 5px 3px 0; font-size: 13px; color: var(--text-soft);
}
.tag.ok { background: #e6f6ec; color: var(--ok); }
.tag.warn { background: #fdf3e2; color: var(--warn); }
.tag.err { background: #fdecec; color: var(--err); }
.plain-list { list-style: none; }
.plain-list li { padding: 4px 0; }
.rank-good { font-size: 16px; padding: 10px 0; }
.rank-none { padding: 10px 0; color: var(--muted); }
.ad-slot { margin: 16px 0; text-align: center; overflow: hidden; }

/* ---------------- SEO 结果区 ---------------- */
.kv { display: flex; border-bottom: 1px dashed var(--border); padding: 8px 0; align-items: flex-start; }
.kv .k { flex: 0 0 118px; color: var(--muted); }
.kv .v { flex: 1; word-break: break-all; }
.engine-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(148px, 1fr)); gap: 12px; }
.engine-card {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 12px;
  text-align: center; background: linear-gradient(180deg, #fff, #f8fbff);
  transition: box-shadow .18s, transform .18s;
}
.engine-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.engine-card .num { font-size: 22px; font-weight: 700; color: var(--primary); line-height: 1.3; }
.engine-card .lbl { color: var(--muted); font-size: 13px; margin-top: 6px; }

/* SEO 诊断建议 */
.advice-list { list-style: none; }
.advice-list li { padding: 7px 12px 7px 30px; border-bottom: 1px dashed var(--border); position: relative; }
.advice-list li:last-child { border-bottom: none; }
.advice-list li:before { position: absolute; left: 10px; font-weight: 700; }
.adv-ok:before { content: "✓"; color: var(--ok); }
.adv-warn:before { content: "!"; color: var(--warn); }
.adv-err:before { content: "✕"; color: var(--err); }

/* 加载骨架 */
.loading-panel {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px; text-align: center; color: var(--muted); box-shadow: var(--shadow);
}
.sk-row {
  height: 14px; border-radius: 7px; margin: 10px auto; max-width: 620px;
  background: linear-gradient(90deg, #eef1f5 25%, #f7f9fb 37%, #eef1f5 63%);
  background-size: 400% 100%; animation: sk 1.2s ease infinite;
}
.sk-row.short { width: 55%; }
@keyframes sk { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

/* ---------------- 相关工具 ---------------- */
.related-tools { margin: 26px 0 8px; }
.related-tools h2 { font-size: 17px; margin-bottom: 12px; padding-left: 10px; border-left: 3px solid var(--primary); }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 12px; }
.related-card {
  display: grid; grid-template-columns: 32px 1fr; grid-template-rows: auto auto;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 14px; color: var(--text); transition: box-shadow .18s, border-color .18s;
}
.related-card:hover { box-shadow: var(--shadow-hover); border-color: var(--primary); }
.rt-icon { grid-row: 1 / 3; font-size: 22px; }
.rt-name { font-weight: 600; font-size: 14px; }
.rt-desc { color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------------- 页脚 ---------------- */
.site-footer { background: #232b38; color: #97a1b2; padding: 32px 0 24px; margin-top: 36px; font-size: 13px; }
.footer-inner { display: flex; flex-direction: column; gap: 16px; }
.footer-title { color: #fff; font-size: 15px; margin-bottom: 14px; font-weight: 600; }
.footer-nav { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 20px; }
.footer-col h3 { color: #cbd3de; font-size: 13px; margin-bottom: 8px; font-weight: 600; }
.footer-col ul { list-style: none; }
.footer-col li { padding: 3px 0; }
.footer-col a { color: #97a1b2; }
.footer-col a:hover { color: #fff; }
.footer-copy { border-top: 1px solid #313a49; padding-top: 14px; text-align: center; }

/* ---------------- 后台（沿用） ---------------- */
.admin-wrap { display: flex; gap: 16px; align-items: flex-start; }
.admin-side { flex: 0 0 180px; background: #232b38; border-radius: var(--radius); overflow: hidden; }
.admin-side a { display: block; color: #b8c0cc; padding: 12px 18px; }
.admin-side a:hover { background: #2d3748; }
.admin-side a.active { background: var(--primary); color: #fff; }
.admin-side .side-title { color: #8a94a6; font-size: 12px; padding: 14px 18px 6px; }
.admin-main { flex: 1; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; min-width: 0; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(158px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card { background: linear-gradient(160deg, #fff, #f2f7fd); border: 1px solid #dce8f5; border-radius: var(--radius); padding: 16px; }
.stat-card .num { font-size: 26px; font-weight: 700; color: var(--primary); }
.stat-card .lbl { color: var(--muted); font-size: 13px; }
.admin-form input, .admin-form select { height: 38px; border: 1px solid var(--border); border-radius: 6px; padding: 0 10px; margin-right: 8px; }
.admin-form textarea { width: 100%; border: 1px solid var(--border); border-radius: 6px; padding: 10px; margin-bottom: 10px; }
.toggle { font-size: 13px; padding: 3px 11px; border-radius: 20px; border: none; cursor: pointer; background: #eef1f5; }
.toggle.on { background: #e6f6ec; color: var(--ok); }
.toggle.off { background: #fdecec; color: var(--err); }
.pager { margin-top: 12px; }
.pager a { margin-right: 6px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 6px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
  .home-two-col { grid-template-columns: 1fr; }
  .hero h1 { font-size: 22px; }
  .admin-wrap { flex-direction: column; }
  .admin-side { flex: none; width: 100%; display: flex; flex-wrap: wrap; }
  .admin-side .side-title { width: 100%; }
}
@media (max-width: 640px) {
  .hero { padding: 30px 16px 24px; }
  .hero h1 { font-size: 20px; }
  .search-box { flex-wrap: nowrap; }
  .search-box button { padding: 0 16px; font-size: 15px; }
  .kv .k { flex-basis: 92px; }
  .nav-cat { padding: 6px 8px; font-size: 13px; }
  .header-inner { gap: 12px; }
  .logo-text { display: none; }
  .data-table { font-size: 12.5px; }
  .data-table th, .data-table td { padding: 8px 8px; }
}

/* ---------------- 通用表单控件（第二批工具） ---------------- */
.sel-inline {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; font-size: 14px; color: var(--text); outline: none; max-width: 100%;
}
.sel-inline:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,102,179,.12); }
.panel textarea, .panel input[type=text], .panel input[type=number] {
  background: #fff; color: var(--text); font-size: 14px; line-height: 1.6;
}
.panel .btn-primary { display: inline-block; }