/* ============================================
   EAIBase.cn — 全站样式（中文优化版）
   基于母站 EAIIndustry.com，适配中文排版
   ============================================ */

:root {
  --color-primary: #0a4d8c;
  --color-primary-dark: #073a6b;
  --color-accent: #00c2a8;
  --color-accent-light: #33d4be;
  --color-highlight: #d94f2b;          /* 中国市场点缀色 */
  --color-bg: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', 'PingFang SC', 'Microsoft YaHei', var(--font-sans);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
  --header-height: 72px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 17px;                       /* 中文正文略大 */
  line-height: 1.8;                     /* 中文行高 1.8 */
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Header（由 components.js 注入） ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.logo span {
  color: var(--color-accent);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav a {
  padding: 8px 16px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 8px;
  transition: background var(--transition), color var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  background: rgba(10, 77, 140, 0.08);
  color: var(--color-primary);
}

.nav-cta {
  background: var(--color-primary) !important;
  color: #fff !important;
  padding: 10px 20px !important;
}

.nav-cta:hover {
  background: var(--color-primary-dark) !important;
  color: #fff !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* ---- Footer（由 components.js 注入） ---- */
.site-footer {
  background: var(--color-bg-dark);
  color: #94a3b8;
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

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

.footer-brand p {
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 12px;
}

.footer-col a {
  color: #94a3b8;
  font-size: 0.9375rem;
}

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

/* 跨站互链区块 */
.cross-sell-banner {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.cross-sell-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cross-sell-item .cross-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.cross-sell-item a {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
}

.cross-sell-item a:hover {
  color: var(--color-accent);
}

.cross-sell-item p {
  font-size: 0.8125rem;
  color: #94a3b8;
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
}

.footer-bottom a {
  color: #94a3b8;
}

/* ---- Hero ---- */
.hero {
  padding: calc(var(--header-height) + 80px) 0 100px;
  background: linear-gradient(160deg, #0f172a 0%, #1e3a5f 50%, #0a4d8c 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(0, 194, 168, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(217, 79, 43, 0.12) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 194, 168, 0.15);
  border: 1px solid rgba(0, 194, 168, 0.3);
  color: var(--color-accent-light);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.125rem, 5vw, 3.25rem);
  font-weight: 600;                    /* 中文标题字重略减 */
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-desc {
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 36px;
  max-width: 640px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-accent);
  color: #0f172a;
}

.btn-primary:hover {
  background: var(--color-accent-light);
  box-shadow: 0 8px 24px rgba(0, 194, 168, 0.35);
  color: #0f172a;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.stat-item strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
}

.stat-item span {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
}

/* ---- Sections ---- */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;                    /* 中文标题字重略减 */
  margin-bottom: 16px;
  line-height: 1.4;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  line-height: 1.8;
}

/* ---- 价值卡 ---- */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.value-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.value-icon img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.value-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.value-card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ---- 域名集 ---- */
.domains-section {
  background: var(--color-surface);
}

.domain-toolbar {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
  align-items: center;
}

.domain-search {
  flex: 1;
  min-width: 240px;
  position: relative;
}

.domain-search input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 0.9375rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.domain-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10, 77, 140, 0.1);
}

.domain-search svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
}

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

.filter-tag {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  background: var(--color-bg);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.filter-tag:hover,
.filter-tag.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.domain-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  transition: all var(--transition);
}

.domain-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.domain-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.domain-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
}

.domain-category {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.domain-tld {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  background: rgba(10, 77, 140, 0.08);
  color: var(--color-primary);
  border-radius: 6px;
}

.domain-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 2px 0 6px;
}

.domain-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 4px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

.domain-status {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #0a7d68;
  background: rgba(0, 194, 168, 0.12);
  padding: 3px 8px;
  border-radius: 4px;
}

.domain-card.featured {
  background: linear-gradient(135deg, rgba(10, 77, 140, 0.05), rgba(0, 194, 168, 0.05));
  border-color: var(--color-accent);
}

.domain-card.featured .domain-status {
  color: #fff;
  background: var(--color-primary);
}

.domain-card.featured.anchor .domain-status {
  background: var(--color-highlight);
}

.domain-buy {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
}

.domain-buy:hover {
  color: var(--color-accent);
}

.domain-count {
  text-align: center;
  margin-top: 32px;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* ---- 空状态 ---- */
.domains-empty {
  text-align: center;
  margin-top: 24px;
  padding: 24px;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
}

.link-button {
  background: none;
  border: none;
  color: var(--color-primary);
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  font-size: inherit;
  font-family: inherit;
  padding: 0;
}

/* ---- 文章卡 ---- */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

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

.article-card-image {
  height: 180px;
  background-color: var(--color-border);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.article-card-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.article-category {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.article-badge-featured {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
  background: var(--color-primary);
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.article-badge-featured.highlight {
  background: var(--color-highlight);
}

.article-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 12px;
}

.article-card h3 a {
  color: var(--color-text);
}

.article-card h3 a:hover {
  color: var(--color-primary);
}

.article-excerpt {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  flex: 1;
  margin-bottom: 16px;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  margin-bottom: 16px;
}

.article-card-meta time {
  font-variant-numeric: tabular-nums;
}

.read-more {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ---- 文章详情页 ---- */
.article-page {
  padding: calc(var(--header-height) + 48px) 0 80px;
}

.article-hero {
  max-width: 760px;
  margin: 0 auto 48px;
}

.article-hero .article-category {
  margin-bottom: 16px;
}

.article-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  gap: 24px;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.article-content {
  max-width: 760px;
  margin: 0 auto;
}

.article-content h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 40px 0 16px;
  line-height: 1.4;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 32px 0 12px;
  line-height: 1.45;
}

.article-content p {
  margin-bottom: 20px;
  color: var(--color-text);
  line-height: 1.85;
}

.article-content ul,
.article-content ol {
  margin: 0 0 20px 24px;
}

.article-content li {
  margin-bottom: 10px;
  line-height: 1.8;
}

.article-content blockquote {
  border-left: 4px solid var(--color-accent);
  padding: 16px 24px;
  margin: 24px 0;
  background: rgba(0, 194, 168, 0.06);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-muted);
}

.article-content blockquote p {
  margin-bottom: 8px;
  line-height: 1.75;
}

.article-content blockquote cite {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-style: normal;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9375rem;
}

.article-content th,
.article-content td {
  border: 1px solid var(--color-border);
  padding: 12px 16px;
  text-align: left;
}

.article-content th {
  background: var(--color-bg);
  font-weight: 600;
}

.article-cta {
  margin-top: 48px;
  padding: 32px;
  background: linear-gradient(135deg, rgba(10, 77, 140, 0.06), rgba(0, 194, 168, 0.06));
  border-radius: var(--radius-lg);
  text-align: center;
}

.article-cta h3 {
  margin-bottom: 12px;
}

.article-cta p {
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

/* ---- 相关文章 ---- */
.related-articles {
  margin-top: 64px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.related-articles h2 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 24px;
  text-align: center;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.related-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.related-card .article-category {
  font-size: 0.6875rem;
  margin-bottom: 8px;
}

.related-card h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 8px;
}

.related-card h4 a {
  color: var(--color-text);
}

.related-card h4 a:hover {
  color: var(--color-primary);
}

.related-card .read-more {
  font-size: 0.8125rem;
}

/* ---- 联系区 ---- */
.contact-section {
  background: var(--color-bg-dark);
  color: #fff;
}

.contact-section .section-label {
  color: var(--color-accent);
}

.contact-section .section-header h2 {
  color: #fff;
}

.contact-section .section-header p {
  color: #94a3b8;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.contact-info p {
  color: #94a3b8;
  margin-bottom: 24px;
  line-height: 1.8;
}

.contact-details {
  list-style: none;
}

.contact-details li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: #cbd5e1;
}

.contact-form {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: #cbd5e1;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  color: #fff;
  font-size: 0.9375rem;
  font-family: inherit;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group select option {
  background: var(--color-bg-dark);
}

/* ---- Page Banner ---- */
.page-banner {
  padding: calc(var(--header-height) + 48px) 0 48px;
  background: linear-gradient(160deg, #0f172a 0%, #1e3a5f 100%);
  color: #fff;
  text-align: center;
}

.page-banner h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.35;
}

.page-banner p {
  color: rgba(255, 255, 255, 0.72);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---- 信任区 ---- */
.trust-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.trust-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.trust-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.trust-icon img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.trust-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.trust-card p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 12px;
}

/* ---- FAQ ---- */
.faq-section {
  background: var(--color-bg);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 12px;
  transition: box-shadow var(--transition);
}

.faq-item[open] {
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  line-height: 1.5;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-accent);
  font-weight: 400;
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  margin-top: 12px;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ---- 域名集介绍文案 ---- */
.domain-intro {
  background: var(--color-bg);
  padding-bottom: 24px;
}

.domain-intro-inner {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}

.domain-intro-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  margin-bottom: 16px;
  line-height: 1.4;
}

.domain-intro-inner p {
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 16px;
  text-align: left;
}

/* ---- 副工具栏（TLD） ---- */
.domain-toolbar-secondary {
  margin-top: -16px;
  margin-bottom: 24px;
}

.toolbar-label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

/* ---- 打包方案 ---- */
.bundles-section {
  background: var(--color-surface);
}

.bundles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bundle-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.bundle-card-featured {
  background: linear-gradient(135deg, rgba(10, 77, 140, 0.05), rgba(0, 194, 168, 0.05));
  border-color: var(--color-accent);
}

.bundle-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.bundle-count {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.bundle-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  flex: 1;
}

.bundle-list li {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: 4px 0;
  line-height: 1.7;
}

.bundle-desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-bottom: 20px;
  flex: 1;
  line-height: 1.8;
}

.bundle-btn {
  align-self: flex-start;
}

/* ---- 文章工具栏 ---- */
.articles-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.rss-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  transition: all var(--transition);
}

.rss-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ---- 空状态（文章） ---- */
.articles-empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--color-text-muted);
  font-size: 1rem;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 32px;
}

/* ---- 订阅区 ---- */
.articles-subscribe {
  margin-top: 64px;
  padding: 40px;
  background: linear-gradient(135deg, rgba(10, 77, 140, 0.06), rgba(0, 194, 168, 0.06));
  border-radius: var(--radius-lg);
  text-align: center;
}

.articles-subscribe h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.articles-subscribe p {
  color: var(--color-text-muted);
  margin-bottom: 24px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.subscribe-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- noscript 兜底导航 ---- */
noscript nav {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 12px 24px;
  text-align: center;
}

noscript nav a {
  margin: 0 8px;
  color: var(--color-primary);
  font-weight: 500;
}

noscript footer {
  background: var(--color-bg-dark);
  color: #94a3b8;
  padding: 24px;
  text-align: center;
  font-size: 0.875rem;
}

noscript footer a {
  color: #94a3b8;
  margin: 0 6px;
}

/* ---- 响应式 ---- */
@media (max-width: 992px) {
  .value-grid,
  .trust-grid,
  .bundles-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .cross-sell-banner {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    pointer-events: none;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav a {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

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

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

  .articles-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-tags {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-tag {
    white-space: nowrap;
  }

  .rss-link {
    align-self: flex-start;
  }

  .domain-toolbar-secondary {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .section {
    padding: 56px 0;
  }

  .hero {
    padding: calc(var(--header-height) + 56px) 0 64px;
  }
}

/*→*/
.arrow-icon {
  display: inline-block; /* 必须设置为 inline-block 才能使用 transform */
  transition: transform 0.3s ease-in-out; /* 设置平滑过渡 */
}

a:hover .arrow-icon {
  transform: translateX(5px); /* 鼠标悬停时向右移动 5px */
}