/* SEO 专栏页面与 404 独立样式规范 */
.column-page {
  background: #0a0c10;
  color: #e2e8f0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.column-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 12, 16, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.column-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.column-logo img {
  height: 40px;
  width: auto;
  display: block;
}

.column-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.column-nav a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease;
}

.column-nav a:hover,
.column-nav a.is-active {
  color: #00f2fe;
}

.column-cta-btn {
  padding: 8px 18px;
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #04101d !important;
  font-weight: 700;
  border-radius: 999px;
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.35);
}

.column-main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 20px 80px;
  flex: 1;
  width: 100%;
}

/* 面包屑导航 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: #64748b;
  margin-bottom: 24px;
}

.breadcrumb a {
  color: #94a3b8;
  text-decoration: none;
}

.breadcrumb a:hover {
  color: #00f2fe;
}

.breadcrumb-separator {
  color: #475569;
}

/* 栏目头部 */
.column-hero {
  margin-bottom: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.column-hero h1 {
  font-size: 32px;
  line-height: 1.3;
  margin: 0 0 16px;
  background: linear-gradient(135deg, #ffffff 30%, #4facfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.column-lead {
  font-size: 16px;
  line-height: 1.7;
  color: #94a3b8;
  margin: 0 0 20px;
}

.column-meta-bar {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: #64748b;
  flex-wrap: wrap;
}

.column-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 内容板块 */
.column-content-section {
  margin-bottom: 48px;
}

.column-content-section h2 {
  font-size: 22px;
  color: #f1f5f9;
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.column-content-section h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 20px;
  background: #00f2fe;
  border-radius: 2px;
}

.column-content-section p,
.column-content-section li {
  font-size: 15px;
  line-height: 1.8;
  color: #cbd5e1;
}

/* 特色卡片网格 */
.column-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.column-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.column-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 242, 254, 0.4);
}

.column-card-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.column-card h3 {
  font-size: 18px;
  color: #f8fafc;
  margin: 0 0 10px;
}

.column-card p {
  font-size: 14px;
  color: #94a3b8;
  margin: 0;
  line-height: 1.6;
}

/* 测评对比数据表格 */
.column-table-wrapper {
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
}

.column-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.column-table th {
  background: rgba(255, 255, 255, 0.05);
  color: #38bdf8;
  padding: 14px 18px;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.column-table td {
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: #cbd5e1;
}

.column-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* 核心引流横幅 */
.column-promo-banner {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.08) 0%, rgba(79, 172, 254, 0.12) 100%);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: 16px;
  padding: 32px;
  margin: 40px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.column-promo-text h3 {
  font-size: 22px;
  color: #fff;
  margin: 0 0 10px;
}

.column-promo-text p {
  color: #94a3b8;
  font-size: 14px;
  margin: 0 0 12px;
  line-height: 1.6;
}

.column-coupon-tag {
  display: inline-block;
  background: rgba(0, 0, 0, 0.5);
  border: 1px dashed #00f2fe;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  color: #cbd5e1;
}

.column-coupon-tag strong {
  color: #00f2fe;
  font-size: 16px;
  margin-left: 6px;
}

.column-promo-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  color: #04101d;
  font-weight: 700;
  border-radius: 8px;
  text-decoration: none;
  font-size: 15px;
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}

.column-promo-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 28px rgba(0, 242, 254, 0.6);
}

/* 栏目互通内链网络 (Cluster Links) */
.cluster-links-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 24px;
  margin-top: 50px;
}

.cluster-links-box h4 {
  font-size: 16px;
  color: #f1f5f9;
  margin: 0 0 16px;
}

.cluster-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.cluster-tags a {
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  color: #94a3b8;
  text-decoration: none;
  font-size: 13px;
  transition: all 0.2s ease;
}

.cluster-tags a:hover {
  color: #00f2fe;
  border-color: rgba(0, 242, 254, 0.3);
  background: rgba(0, 242, 254, 0.05);
}

/* 404 独立样式 */
.error-container {
  text-align: center;
  padding: 100px 20px;
}

.error-code {
  font-size: 96px;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, #ff2a40 0%, #00f2fe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0 0 20px;
}

.error-title {
  font-size: 24px;
  color: #fff;
  margin: 0 0 12px;
}

.error-desc {
  font-size: 15px;
  color: #94a3b8;
  max-width: 480px;
  margin: 0 auto 30px;
  line-height: 1.6;
}

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

.error-btn-primary {
  padding: 12px 24px;
  background: #00f2fe;
  color: #04101d;
  font-weight: bold;
  border-radius: 8px;
  text-decoration: none;
}

.error-btn-secondary {
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
}