/*
Theme Name: CrossBorder Nav
Theme URI: https://example.com/crossborder-nav
Author: Your Name
Author URI: https://example.com
Description: 一站式跨境电商资源导航主题
Version: 1.1.0
License: GNU General Public License v2 or later
Text Domain: crossborder-nav
*/

/* ================================
   CSS Variables — Design System
   ================================ */
:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #e8f0fe;
  --accent: #ff6d00;
  --accent-light: #fff3e0;
  --success: #52c41a;
  --text: #2c3e50;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --bg: #f5f7fa;
  --bg-soft: #f8fafc;
  --bg-white: #fff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 3px rgba(15,23,42,.06);
  --shadow: 0 2px 8px rgba(15,23,42,.08);
  --shadow-md: 0 6px 16px rgba(15,23,42,.10);
  --shadow-lg: 0 12px 32px rgba(15,23,42,.12);
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --container: 1400px;
}

/* ================================
   Reset & Base
   ================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 14px; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-dark); }

img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; outline: none; }

/* ================================
   Container
   ================================ */
.cb-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ================================
   Top Bar
   ================================ */
.cb-topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  font-size: 12px;
}

.cb-topbar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cb-topbar__clocks {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.cb-clock {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--text-muted);
}

.cb-clock__dot {
  width: 6px; height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(82,196,26,.4); }
  50% { opacity: .6; box-shadow: 0 0 0 4px rgba(82,196,26,0); }
}

.cb-clock__city { color: var(--text); font-weight: 500; }
.cb-clock__time {
  color: var(--primary);
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-weight: 600;
}

.cb-topbar__actions {
  display: flex; align-items: center; gap: 18px;
}

.cb-topbar__link {
  color: var(--text-muted);
  transition: color .2s;
}
.cb-topbar__link:hover { color: var(--primary); }

.cb-btn-settle {
  background: linear-gradient(135deg, var(--accent), #ff9500);
  color: #fff !important;
  padding: 6px 18px;
  border-radius: 20px;
  font-weight: 500;
  transition: transform .2s, box-shadow .2s;
  box-shadow: 0 2px 6px rgba(255,109,0,.3);
}
.cb-btn-settle:hover {
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255,109,0,.4);
}

/* ================================
   Header
   ================================ */
.cb-header {
  background: #fff;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,.95);
}

.cb-header__inner {
  display: flex;
  align-items: center;
  gap: 32px;
}

/* Logo */
.cb-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.cb-logo__icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700;
  box-shadow: 0 4px 12px rgba(26,115,232,.25);
}

.cb-logo__text-wrap { display: flex; flex-direction: column; }
.cb-logo__text {
  font-size: 20px; font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -.5px;
}
.cb-logo__sub { font-size: 12px; color: var(--text-muted); }

/* Search */
.cb-search { flex: 1; max-width: 560px; }

.cb-search__tabs {
  display: flex; gap: 4px; margin-bottom: 8px;
}

.cb-search__tab {
  padding: 4px 12px;
  font-size: 12px;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all .2s;
}
.cb-search__tab:hover { color: var(--primary); background: var(--primary-light); }
.cb-search__tab.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

.cb-search__form {
  display: flex;
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .2s;
}
.cb-search__form:focus-within {
  box-shadow: 0 0 0 4px rgba(26,115,232,.15);
}

.cb-search__input {
  flex: 1;
  padding: 11px 16px;
  border: none;
  font-size: 14px;
  outline: none;
  background: transparent;
}
.cb-search__input::placeholder { color: var(--text-light); }

.cb-search__btn {
  padding: 0 24px;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: flex; align-items: center; gap: 6px;
  transition: background .2s;
}
.cb-search__btn:hover { background: var(--primary-dark); }

/* Nav */
.cb-nav__list { display: flex; gap: 24px; }
.cb-nav__link {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
}
.cb-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: width .25s;
}
.cb-nav__link:hover::after,
.current-menu-item .cb-nav__link::after { width: 100%; }
.current-menu-item .cb-nav__link { color: var(--primary); }

/* ================================
   Breadcrumb
   ================================ */
.cb-breadcrumb {
  background: var(--bg-soft);
  padding: 14px 0;
  font-size: 13px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-light);
}
.cb-breadcrumb a { color: var(--text-muted); }
.cb-breadcrumb a:hover { color: var(--primary); }
.cb-breadcrumb__sep { margin: 0 8px; color: var(--text-light); }
.cb-breadcrumb__current { color: var(--text); font-weight: 500; }

/* ================================
   Layout
   ================================ */
.cb-layout {
  display: flex;
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px;
  gap: 20px;
}

/* Sidebar */
.cb-sidebar {
  width: 200px;
  flex-shrink: 0;
}

.cb-sidebar__inner {
  background: #fff;
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 100px;
}

/* Category Nav */
.cb-cat-nav__item { margin-bottom: 2px; }
.cb-cat-nav__link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  color: var(--text);
  font-size: 13px;
  border-radius: var(--radius-sm);
  transition: all .2s;
}
.cb-cat-nav__link:hover,
.cb-cat-nav__link--active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}
.cb-cat-nav__icon { font-size: 16px; width: 20px; text-align: center; }

/* Quick Tools */
.cb-quick-tools {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.cb-quick-tools__title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.cb-quick-tools__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}
.cb-quick-tool {
  padding: 8px 4px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text);
  text-align: center;
  transition: all .2s;
}
.cb-quick-tool:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.cb-quick-tools__links {
  display: flex; flex-wrap: wrap; gap: 12px;
}
.cb-quick-tools__links a {
  font-size: 13px;
  color: var(--text-muted);
}
.cb-quick-tools__links a:hover { color: var(--primary); }

/* ================================
   Main Content
   ================================ */
.cb-main { flex: 1; min-width: 0; }

/* Section */
.cb-section {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.cb-section__header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--primary-light);
}

.cb-section__title {
  display: flex; align-items: center; gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}

.cb-section__icon {
  font-size: 22px;
  width: 32px; height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
}

.cb-section__filters {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  flex: 1;
}

.cb-filter-btn {
  padding: 5px 12px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  transition: all .2s;
}
.cb-filter-btn:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.cb-filter-btn.active {
  color: #fff;
  background: var(--primary);
}

.cb-section__more {
  margin-left: auto;
  font-size: 13px;
  color: var(--text-light);
  display: flex; align-items: center; gap: 4px;
}
.cb-section__more:hover { color: var(--primary); }

/* ================================
   Cards Grid (Improved)
   ================================ */
.cb-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.cb-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: all .25s;
  position: relative;
  overflow: hidden;
}

.cb-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--primary);
  transform: scaleY(0);
  transition: transform .25s;
  transform-origin: top;
}

.cb-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.cb-card:hover::before { transform: scaleY(1); }

.cb-card__icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(26,115,232,.2);
}

.cb-card__content {
  flex: 1;
  min-width: 0;
}

.cb-card__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.cb-card__title-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.cb-card__badge {
  font-size: 10px;
  padding: 1px 6px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 4px;
  font-weight: 600;
}

.cb-card__desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}

.cb-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  color: var(--text-light);
}

.cb-card__tag {
  background: var(--bg);
  padding: 2px 8px;
  border-radius: 10px;
  color: var(--text-muted);
}

.cb-card__views::before {
  content: '👁 ';
  font-size: 10px;
}

/* ================================
   Footer
   ================================ */
.cb-footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 40px 0 20px;
  margin-top: 40px;
}

.cb-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 30px;
}

.cb-footer__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}
.cb-footer__text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
}
.cb-footer__links li { margin-bottom: 10px; }
.cb-footer__links a {
  font-size: 13px;
  color: var(--text-muted);
}
.cb-footer__links a:hover { color: var(--primary); }

.cb-footer__bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-light);
}

/* ================================
   Single Site Page (Detail Page)
   ================================ */
.cb-single {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.cb-single__hero {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.cb-single__logo {
  width: 96px;
  height: 96px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(26,115,232,.25);
}

.cb-single__head { flex: 1; min-width: 0; }

.cb-single__title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 8px;
  display: flex; align-items: center; gap: 10px;
}

.cb-single__badges {
  display: flex; gap: 8px; margin-bottom: 10px;
}

.cb-single__badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.cb-single__badge--accent {
  background: var(--accent-light);
  color: var(--accent);
}
.cb-single__badge--primary {
  background: var(--primary-light);
  color: var(--primary);
}
.cb-single__badge--muted {
  background: var(--bg);
  color: var(--text-muted);
}

.cb-single__meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.cb-single__meta-item {
  display: flex; align-items: center; gap: 4px;
}

.cb-single__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cb-single__btn {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all .2s;
  cursor: pointer;
}

.cb-single__btn--primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff !important;
  box-shadow: 0 4px 12px rgba(26,115,232,.3);
}
.cb-single__btn--primary:hover {
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(26,115,232,.4);
}

.cb-single__btn--outline {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text) !important;
}
.cb-single__btn--outline:hover {
  border-color: var(--primary);
  color: var(--primary) !important;
}

/* Single Content */
.cb-single__content {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}

.cb-single__content h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin: 28px 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--primary);
}

.cb-single__content h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin: 22px 0 10px;
}

.cb-single__content p { margin-bottom: 12px; }
.cb-single__content ul, .cb-single__content ol {
  margin: 12px 0;
  padding-left: 24px;
  list-style: disc;
}
.cb-single__content li { margin-bottom: 6px; }
.cb-single__content a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: var(--primary-light);
  text-underline-offset: 3px;
}
.cb-single__content a:hover { text-decoration-color: var(--primary); }

/* Single Footer */
.cb-single__footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.cb-single__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.cb-single__tag {
  padding: 5px 12px;
  background: var(--bg);
  border-radius: 14px;
  font-size: 12px;
  color: var(--text-muted);
  transition: all .2s;
}
.cb-single__tag:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.cb-single__notice {
  margin-top: 24px;
  padding: 16px;
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.7;
  border-left: 3px solid var(--accent);
}

/* Related Sites */
.cb-related {
  margin-top: 24px;
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.cb-related__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
  display: flex; align-items: center; gap: 8px;
}

/* ================================
   Responsive
   ================================ */
@media (max-width: 1200px) {
  .cb-layout { flex-direction: column; }
  .cb-sidebar { width: 100%; }
  .cb-sidebar__inner {
    position: static;
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 16px;
  }
  .cb-cat-nav__list { display: flex; gap: 8px; flex-shrink: 0; }
  .cb-cat-nav__item { margin-bottom: 0; }
  .cb-cat-nav__link { white-space: nowrap; }
  .cb-quick-tools {
    margin-top: 0; padding-top: 0; border-top: none;
    border-left: 1px solid var(--border);
    padding-left: 20px;
    min-width: 200px;
    flex-shrink: 0;
  }
}

@media (max-width: 768px) {
  .cb-header__inner { flex-wrap: wrap; }
  .cb-search {
    order: 3; max-width: 100%; width: 100%; margin-top: 12px;
  }
  .cb-nav__list {
    gap: 16px;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  .cb-topbar__clocks { display: none; }
  .cb-cards-grid { grid-template-columns: 1fr; }
  .cb-footer__grid { grid-template-columns: 1fr 1fr; }
  .cb-single { padding: 20px; }
  .cb-single__hero { flex-direction: column; align-items: flex-start; }
  .cb-single__actions { flex-direction: row; width: 100%; }
  .cb-single__btn { flex: 1; }
}

@media (max-width: 480px) {
  .cb-section__header { flex-direction: column; align-items: flex-start; }
  .cb-section__filters {
    width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px;
  }
  .cb-footer__grid { grid-template-columns: 1fr; }
}
/* ===== Card Logo Images ===== */
.cb-card__logo-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 8px;
    display: block;
    flex-shrink: 0;
}
.cb-card__logo-fallback {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-weight: 700;
    font-size: 18px;
    border-radius: 8px;
    flex-shrink: 0;
}

/* ===== Single Detail Page Logo ===== */
.cb-single__logo-img {
    width: 96px;
    height: 96px;
    object-fit: contain;
    border-radius: 16px;
    display: block;
    flex-shrink: 0;
}
.cb-single__logo-fallback {
    width: 96px;
    height: 96px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-weight: 700;
    font-size: 36px;
    border-radius: 16px;
    flex-shrink: 0;
}