/* ========================================
   潮鞋收藏 - 样式表
   www.qiuxieku.cn
   ======================================== */

/* CSS 变量 */
:root {
  --accent-color: #ff5722;
  --accent-hover: #e64a19;
  --bg-primary: #fafafa;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-muted: #9e9e9e;
  --border-color: #e0e0e0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
}

/* 重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ========================================
   布局容器
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 40px 0;
}

/* ========================================
   页头
   ======================================== */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

.nav a:hover,
.nav a.active {
  color: var(--accent-color);
}

.search-box {
  position: relative;
}

.search-box input {
  width: 240px;
  height: 40px;
  padding: 0 40px 0 16px;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 14px;
  background: var(--bg-primary);
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-color);
  width: 280px;
}

.search-box button {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, #fff3e0 100%);
  padding: 60px 0;
  text-align: center;
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 40px;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-color);
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* ========================================
   分类集合
   ======================================== */
.section-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--accent-color);
  border-radius: 2px;
}

.collections {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.collection-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.collection-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-color);
}

.collection-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 28px;
}

.collection-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.collection-card span {
  font-size: 13px;
  color: var(--text-muted);
}

/* ========================================
   球鞋卡片
   ======================================== */
.shoe-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.shoe-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.shoe-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.shoe-image {
  position: relative;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
  overflow: hidden;
}

.shoe-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.shoe-card:hover .shoe-image img {
  transform: scale(1.05);
}

.shoe-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--accent-color);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.shoe-info {
  padding: 20px;
}

.shoe-info h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}

.shoe-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.shoe-brand {
  font-size: 13px;
  color: var(--accent-color);
  font-weight: 500;
}

.shoe-date {
  font-size: 13px;
  color: var(--text-muted);
}

.shoe-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========================================
   面包屑
   ======================================== */
.breadcrumb {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--accent-color);
}

.breadcrumb li:last-child {
  color: var(--text-primary);
  font-weight: 500;
}

.breadcrumb-separator {
  color: var(--text-muted);
}

/* ========================================
   筛选器
   ======================================== */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 16px 20px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.filter-tabs {
  display: flex;
  gap: 8px;
}

.filter-tab {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--accent-color);
  color: white;
}

.filter-count {
  font-size: 14px;
  color: var(--text-muted);
}

/* ========================================
   标签云
   ======================================== */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-primary);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.tag:hover {
  background: var(--accent-color);
  color: white;
}

.tag-count {
  background: rgba(0,0,0,0.08);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
}

.tag:hover .tag-count {
  background: rgba(255,255,255,0.3);
}

/* ========================================
   文章详情页
   ======================================== */
.article-header {
  background: var(--bg-secondary);
  padding: 40px 0;
  border-bottom: 1px solid var(--border-color);
}

.article-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.article-meta-item .label {
  color: var(--text-muted);
}

.article-meta-item .value {
  color: var(--text-primary);
  font-weight: 500;
}

.article-content {
  padding: 40px 0;
}

.article-main {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
}

.article-body {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--border-color);
}

.article-body h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 32px 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.article-body img {
  width: 100%;
  border-radius: var(--radius-md);
  margin: 24px 0;
}

.article-body ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
}

.article-body li {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

/* 侧边栏 */
.sidebar-section {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 24px;
  border: 1px solid var(--border-color);
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.sidebar-item:hover {
  background: var(--bg-primary);
}

.sidebar-item-thumb {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-item-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar-item-info h4 {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar-item-info span {
  font-size: 12px;
  color: var(--text-muted);
}

/* ========================================
   推荐文章区
   ======================================== */
.recommend-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.recommend-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.recommend-block h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.recommend-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.recommend-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.recommend-item::before {
  content: '•';
  color: var(--accent-color);
  font-weight: bold;
}

.recommend-item:hover {
  color: var(--accent-color);
}

/* ========================================
   404 页面
   ======================================== */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.error-content {
  max-width: 480px;
}

.error-code {
  font-size: 120px;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.8;
}

.error-title {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 48px 0 24px;
}

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

.footer-brand .logo {
  color: white;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
}

.footer-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
  .article-main {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .sidebar-section {
    margin-bottom: 0;
  }
}

@media (max-width: 768px) {
  .header .container {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 20px;
    gap: 12px;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: center;
    gap: 20px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
  }

  .search-box {
    order: 2;
  }

  .search-box input {
    width: 160px;
  }

  .search-box input:focus {
    width: 180px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-num {
    font-size: 28px;
  }

  .collections {
    grid-template-columns: repeat(2, 1fr);
  }

  .shoe-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .recommend-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .filter-bar {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .article-title {
    font-size: 24px;
  }

  .article-body {
    padding: 20px;
  }

  .error-code {
    font-size: 80px;
  }
}

@media (max-width: 480px) {
  .collections {
    grid-template-columns: 1fr;
  }

  .shoe-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .error-actions {
    flex-direction: column;
  }
}