/* =====================================================
   城市文旅指南网站 - 全局样式
   技术栈: Bootstrap 5 + 自定义样式
   ===================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --ct-primary: #1a6b4a;
  --ct-primary-light: #e8f5ee;
  --ct-primary-dark: #0e4a32;
  --ct-accent: #e8973f;
  --ct-accent-light: #fef5ea;
  --ct-text: #2d2d2d;
  --ct-text-muted: #6c757d;
  --ct-bg: #f8f9fa;
  --ct-white: #ffffff;
  --ct-border: #e9ecef;
  --ct-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --ct-shadow-hover: 0 6px 24px rgba(0, 0, 0, 0.12);
  --ct-radius: 12px;
  --ct-radius-sm: 8px;
  --ct-transition: all 0.3s ease;
}

/* ---------- 基础重置 ---------- */
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ct-text);
  background: var(--ct-bg);
  line-height: 1.7;
}

a {
  text-decoration: none;
  color: var(--ct-primary);
  transition: var(--ct-transition);
}

a:hover {
  color: var(--ct-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
}

/* ---------- 导航栏 ---------- */
.navbar-ct {
  background: var(--ct-white);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
  padding: 0.6rem 0;
  transition: var(--ct-transition);
  z-index: 1050;
}

.navbar-ct.scrolled {
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.1);
}

.navbar-ct .navbar-brand {
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--ct-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-ct .navbar-brand .brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--ct-primary), var(--ct-accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
}

.navbar-ct .nav-link {
  color: var(--ct-text);
  font-weight: 500;
  padding: 0.5rem 0.9rem !important;
  border-radius: var(--ct-radius-sm);
  font-size: 0.95rem;
  transition: var(--ct-transition);
}

.navbar-ct .nav-link:hover,
.navbar-ct .nav-link.active {
  color: var(--ct-primary);
  background: var(--ct-primary-light);
}

.navbar-ct .nav-link i {
  margin-right: 4px;
}

/* ---------- Hero Banner ---------- */
.hero-banner {
  position: relative;
  min-height: 520px;
  background: linear-gradient(135deg, #1a6b4a 0%, #2d9b6e 50%, #e8973f 100%);
  color: #fff;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-banner h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 1rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.hero-banner .lead {
  font-size: 1.2rem;
  opacity: 0.92;
  margin-bottom: 2rem;
  max-width: 560px;
}

.hero-search {
  max-width: 540px;
}

.hero-search .input-group {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 50px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.hero-search .form-control {
  border: none;
  padding: 0.9rem 1.5rem;
  font-size: 1rem;
  background: transparent;
}

.hero-search .form-control:focus {
  box-shadow: none;
}

.hero-search .btn-search {
  background: var(--ct-primary);
  color: #fff;
  border: none;
  padding: 0 2rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 0 50px 50px 0;
  transition: var(--ct-transition);
}

.hero-search .btn-search:hover {
  background: var(--ct-primary-dark);
}

.hero-tags {
  margin-top: 1.2rem;
}

.hero-tags .badge {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 0.4em 0.9em;
  font-weight: 400;
  font-size: 0.85rem;
  margin: 0.25rem;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--ct-transition);
}

.hero-tags .badge:hover {
  background: rgba(255, 255, 255, 0.35);
}

/* ---------- 通用板块标题 ---------- */
.section-title {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-title h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ct-text);
  margin-bottom: 0.5rem;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  background: var(--ct-accent);
  border-radius: 2px;
}

.section-title p {
  color: var(--ct-text-muted);
  font-size: 0.95rem;
  margin-top: 0.8rem;
}

/* ---------- 板块快速入口 ---------- */
.section-entries {
  padding: 4rem 0;
  background: var(--ct-white);
}

.entry-card {
  text-align: center;
  padding: 2rem 1rem;
  border-radius: var(--ct-radius);
  transition: var(--ct-transition);
  cursor: pointer;
  border: 1px solid transparent;
}

.entry-card:hover {
  background: var(--ct-primary-light);
  border-color: var(--ct-primary);
  transform: translateY(-4px);
  box-shadow: var(--ct-shadow-hover);
}

.entry-card .entry-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.6rem;
  color: #fff;
}

.entry-card h5 {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.entry-card p {
  color: var(--ct-text-muted);
  font-size: 0.85rem;
  margin-bottom: 0;
}

.entry-icon-1 { background: linear-gradient(135deg, #1a6b4a, #2d9b6e); }
.entry-icon-2 { background: linear-gradient(135deg, #e8973f, #f0b86e); }
.entry-icon-3 { background: linear-gradient(135deg, #d94040, #e87272); }
.entry-icon-4 { background: linear-gradient(135deg, #3b82f6, #6da8ff); }
.entry-icon-5 { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.entry-icon-6 { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.entry-icon-7 { background: linear-gradient(135deg, #ec4899, #f472b6); }
.entry-icon-8 { background: linear-gradient(135deg, #14b8a6, #5eead4); }

/* ---------- 热门推荐 ---------- */
.section-hot {
  padding: 4rem 0;
}

.hot-card {
  background: var(--ct-white);
  border-radius: var(--ct-radius);
  overflow: hidden;
  box-shadow: var(--ct-shadow);
  transition: var(--ct-transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.hot-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ct-shadow-hover);
}

.hot-card .card-img-wrapper {
  position: relative;
  overflow: hidden;
  height: 200px;
}

.hot-card .card-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hot-card:hover .card-img-wrapper img {
  transform: scale(1.06);
}

.hot-card .card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--ct-accent);
  color: #fff;
  padding: 0.25em 0.7em;
  font-size: 0.78rem;
  border-radius: 20px;
  font-weight: 600;
}

.hot-card .card-body {
  padding: 1.2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.hot-card .card-title {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hot-card .card-text {
  color: var(--ct-text-muted);
  font-size: 0.88rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hot-card .card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--ct-border);
  font-size: 0.82rem;
  color: var(--ct-text-muted);
}

.hot-card .card-meta .rating {
  color: var(--ct-accent);
  font-weight: 600;
}

/* ---------- 精选攻略 ---------- */
.section-guides {
  padding: 4rem 0;
  background: var(--ct-white);
}

.guide-card {
  background: var(--ct-bg);
  border-radius: var(--ct-radius);
  overflow: hidden;
  transition: var(--ct-transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.guide-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ct-shadow-hover);
}

.guide-card .guide-img {
  height: 180px;
  overflow: hidden;
}

.guide-card .guide-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.guide-card:hover .guide-img img {
  transform: scale(1.06);
}

.guide-card .guide-body {
  padding: 1.2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.guide-card .guide-tag {
  display: inline-block;
  background: var(--ct-primary-light);
  color: var(--ct-primary);
  padding: 0.2em 0.65em;
  font-size: 0.75rem;
  border-radius: 4px;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.guide-card .guide-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.3rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.guide-card .guide-desc {
  color: var(--ct-text-muted);
  font-size: 0.85rem;
  flex: 1;
}

.guide-card .guide-footer {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-top: 0.8rem;
  font-size: 0.8rem;
  color: var(--ct-text-muted);
}

/* ---------- 季节专题 ---------- */
.section-season {
  padding: 4rem 0;
}

.season-card {
  position: relative;
  border-radius: var(--ct-radius);
  overflow: hidden;
  height: 260px;
  display: flex;
  align-items: flex-end;
  transition: var(--ct-transition);
  cursor: pointer;
}

.season-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ct-shadow-hover);
}

.season-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.season-card .season-overlay {
  position: relative;
  z-index: 2;
  padding: 1.5rem;
  width: 100%;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.65));
  color: #fff;
}

.season-card .season-overlay h5 {
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
}

.season-card .season-overlay p {
  font-size: 0.85rem;
  opacity: 0.9;
  margin-bottom: 0;
}

/* ---------- 页脚 ---------- */
.footer-ct {
  background: #1e2a24;
  color: rgba(255, 255, 255, 0.75);
  padding: 3rem 0 1.5rem;
}

.footer-ct h6 {
  color: #fff;
  font-weight: 600;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.footer-ct a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
  transition: var(--ct-transition);
}

.footer-ct a:hover {
  color: #fff;
}

.footer-ct ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-ct ul li {
  margin-bottom: 0.5rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 2rem;
  padding-top: 1.2rem;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- 列表页 ---------- */
.page-header {
  background: linear-gradient(135deg, var(--ct-primary) 0%, var(--ct-primary-dark) 100%);
  color: #fff;
  padding: 3rem 0;
  text-align: center;
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
}

.page-header p {
  opacity: 0.85;
  margin-top: 0.5rem;
}

.filter-bar {
  background: var(--ct-white);
  padding: 1rem 1.5rem;
  border-radius: var(--ct-radius);
  box-shadow: var(--ct-shadow);
  margin-bottom: 2rem;
}

.filter-bar .form-select,
.filter-bar .form-control {
  border-radius: var(--ct-radius-sm);
  border-color: var(--ct-border);
  font-size: 0.9rem;
}

.filter-bar .form-select:focus,
.filter-bar .form-control:focus {
  border-color: var(--ct-primary);
  box-shadow: 0 0 0 0.15rem rgba(26, 107, 74, 0.15);
}

.list-card {
  background: var(--ct-white);
  border-radius: var(--ct-radius);
  overflow: hidden;
  box-shadow: var(--ct-shadow);
  transition: var(--ct-transition);
  display: flex;
  height: 100%;
}

.list-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--ct-shadow-hover);
}

.list-card .list-card-img {
  width: 240px;
  min-height: 180px;
  flex-shrink: 0;
  overflow: hidden;
}

.list-card .list-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.list-card:hover .list-card-img img {
  transform: scale(1.06);
}

.list-card .list-card-body {
  padding: 1.2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.list-card .list-card-title {
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}

.list-card .list-card-desc {
  color: var(--ct-text-muted);
  font-size: 0.88rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.list-card .list-card-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.8rem;
  font-size: 0.82rem;
  color: var(--ct-text-muted);
  flex-wrap: wrap;
}

.list-card .list-card-info i {
  margin-right: 3px;
  color: var(--ct-primary);
}

/* ---------- 详情页 ---------- */
.detail-hero {
  position: relative;
  height: 400px;
  overflow: hidden;
}

.detail-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-hero .detail-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 40%, rgba(0, 0, 0, 0.7));
  display: flex;
  align-items: flex-end;
  padding: 2rem;
  color: #fff;
}

.detail-hero .detail-overlay h1 {
  font-size: 2.2rem;
  font-weight: 700;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.detail-content {
  padding: 2.5rem 0;
}

.detail-main {
  background: var(--ct-white);
  border-radius: var(--ct-radius);
  padding: 2rem;
  box-shadow: var(--ct-shadow);
}

.detail-main h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--ct-primary-light);
}

.detail-main p {
  color: var(--ct-text);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.detail-sidebar .sidebar-card {
  background: var(--ct-white);
  border-radius: var(--ct-radius);
  padding: 1.5rem;
  box-shadow: var(--ct-shadow);
  margin-bottom: 1.5rem;
}

.detail-sidebar .sidebar-card h5 {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--ct-primary-light);
}

.sidebar-item {
  display: flex;
  gap: 0.8rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--ct-border);
}

.sidebar-item:last-child {
  border-bottom: none;
}

.sidebar-item img {
  width: 72px;
  height: 54px;
  object-fit: cover;
  border-radius: var(--ct-radius-sm);
  flex-shrink: 0;
}

.sidebar-item .sidebar-item-title {
  font-weight: 500;
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar-item .sidebar-item-meta {
  font-size: 0.78rem;
  color: var(--ct-text-muted);
}

/* ---------- 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--ct-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--ct-shadow);
  opacity: 0;
  visibility: hidden;
  transition: var(--ct-transition);
  z-index: 1040;
  cursor: pointer;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--ct-primary-dark);
  transform: translateY(-2px);
}

/* ---------- 加载动画 ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式补充 ---------- */
@media (max-width: 991.98px) {
  .hero-banner {
    min-height: 420px;
  }
  .hero-banner h1 {
    font-size: 2rem;
  }
  .list-card {
    flex-direction: column;
  }
  .list-card .list-card-img {
    width: 100%;
    min-height: 200px;
  }
}

@media (max-width: 767.98px) {
  .hero-banner {
    min-height: 360px;
    padding: 2rem 0;
  }
  .hero-banner h1 {
    font-size: 1.6rem;
  }
  .section-title h2 {
    font-size: 1.4rem;
  }
  .detail-hero {
    height: 260px;
  }
  .detail-hero .detail-overlay h1 {
    font-size: 1.5rem;
  }
  .season-card {
    height: 200px;
  }
}