/* ==========================================================================
   云端自由城 Cloud Freedom · 网际快车品牌视觉规范
   主色调：天际蓝、云端白、平流层青、深空邃蓝、日光金微芒
   ========================================================================== */

:root {
  --sky-primary: #0284c7;
  --sky-primary-hover: #0369a1;
  --sky-light: #e0f2fe;
  --sky-lighter: #f0f9ff;
  --sky-cyan: #06b6d4;
  --sky-gold: #f59e0b;
  
  --cloud-bg: #f8fafc;
  --cloud-card: #ffffff;
  --cloud-card-translucent: rgba(255, 255, 255, 0.88);
  --cloud-border: #e2e8f0;
  --cloud-border-highlight: #bae6fd;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  --text-light: #94a3b8;
  --text-on-primary: #ffffff;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(2, 132, 199, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-cloud: 0 20px 25px -5px rgba(2, 132, 199, 0.12), 0 8px 10px -6px rgba(2, 132, 199, 0.06);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container-max-width: 1200px;
}

/* 基础重置与排版 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--cloud-bg);
  color: var(--text-main);
  line-height: 1.68;
  overflow-x: hidden;
  max-width: 100%;
  position: relative;
  min-height: 100vh;
}

/* 云海天际氛围背景 */
.cloud-sky-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 15% 10%, rgba(56, 189, 248, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 25%, rgba(6, 182, 212, 0.1) 0%, transparent 40%),
    linear-gradient(180deg, #f0f9ff 0%, #ffffff 40%, #f8fafc 100%);
  z-index: -2;
  pointer-events: none;
}

.cloud-city-layer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 280px;
  background-image: radial-gradient(circle at 50% 100%, rgba(224, 242, 254, 0.6) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

/* 容器与通用版式 */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

a {
  color: var(--sky-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* 按钮规范 (满足 44px 触控级别) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.65rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
  border: 1px solid transparent;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--sky-primary) 0%, #0270a8 100%);
  color: var(--text-on-primary);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0270a8 0%, #0369a1 100%);
  color: var(--text-on-primary);
  box-shadow: 0 6px 16px rgba(2, 132, 199, 0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--cloud-card);
  color: var(--sky-primary-hover);
  border: 1px solid var(--cloud-border-highlight);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--sky-lighter);
  border-color: var(--sky-primary);
  color: var(--sky-primary);
}

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

.btn-outline:hover {
  background: var(--sky-lighter);
  color: var(--sky-primary);
  border-color: var(--cloud-border-highlight);
}

/* 顶部全站导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--cloud-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.brand-logo:hover {
  color: var(--sky-primary);
}

.brand-icon-box {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.3);
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.4rem 0.2rem;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--sky-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--sky-primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--cloud-border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.65rem;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-main);
  min-height: 44px;
  min-width: 44px;
}

/* 徽标 Badge */
.city-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.85rem;
  background: var(--sky-light);
  color: var(--sky-primary-hover);
  border: 1px solid var(--cloud-border-highlight);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
}

.city-badge.gold {
  background: #fef3c7;
  color: #92400e;
  border-color: #fde68a;
}

/* 1. 城市 Hero 首屏 */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  position: relative;
  text-align: center;
}

.hero-content {
  max-width: 820px;
  margin: 0 auto;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 1.25rem;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--sky-primary) 0%, #0369a1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.hero-sky-card {
  background: var(--cloud-card-translucent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--cloud-border-highlight);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  margin-top: 1.5rem;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.trust-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

.trust-icon {
  color: var(--sky-primary);
  font-size: 1.1rem;
}

/* 通用区块排版 */
.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: rgba(240, 249, 255, 0.5);
  border-top: 1px solid var(--cloud-border);
  border-bottom: 1px solid var(--cloud-border);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 2. 跨境连接图与交互定位图 (实用功能) */
.path-locator-box {
  background: var(--cloud-card);
  border: 1px solid var(--cloud-border-highlight);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2rem;
}

.path-steps-nav {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.path-step-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem 0.5rem;
  background: var(--sky-lighter);
  border: 1px solid var(--cloud-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 72px;
  text-align: center;
}

.path-step-btn:hover {
  background: var(--sky-light);
  border-color: var(--sky-primary);
}

.path-step-btn.active {
  background: var(--sky-primary);
  color: #fff;
  border-color: var(--sky-primary);
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.3);
}

.path-step-num {
  font-size: 0.75rem;
  font-weight: 700;
  opacity: 0.8;
  margin-bottom: 0.2rem;
}

.path-step-btn.active .path-step-num {
  opacity: 0.9;
}

.path-step-title {
  font-size: 0.9rem;
  font-weight: 600;
}

.path-details-card {
  background: var(--cloud-bg);
  border: 1px solid var(--cloud-border);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.path-detail-block h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.path-detail-block p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.path-notice {
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: center;
}

/* 3. 地区说明 (Regions) */
.regions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.region-card {
  background: var(--cloud-card);
  border: 1px solid var(--cloud-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.region-card:hover {
  border-color: var(--cloud-border-highlight);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.region-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.region-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.region-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  background: var(--sky-light);
  color: var(--sky-primary-hover);
  border-radius: var(--radius-full);
}

.region-meta {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.region-desc {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

/* 4. 套餐与计费说明 (Plans) */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.plan-card {
  background: var(--cloud-card);
  border: 1px solid var(--cloud-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.25s ease;
}

.plan-card:hover {
  border-color: var(--sky-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.plan-card.featured {
  border: 2px solid var(--sky-primary);
  background: linear-gradient(180deg, #ffffff 0%, var(--sky-lighter) 100%);
}

.plan-badge {
  position: absolute;
  top: -12px;
  right: 1.5rem;
  background: var(--sky-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
}

.plan-header {
  margin-bottom: 1.5rem;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.plan-price-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.plan-price {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--sky-primary);
}

.plan-unit-price {
  font-size: 0.88rem;
  color: var(--text-dim);
}

.plan-type-note {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  background: #ecfdf5;
  color: #065f46;
  border-radius: var(--radius-sm);
}

.plan-features {
  list-style: none;
  margin: 1.5rem 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--cloud-border);
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.plan-features li::before {
  content: '✓';
  color: var(--sky-primary);
  font-weight: 700;
}

.plan-target {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.verification-note-box {
  background: var(--sky-lighter);
  border: 1px solid var(--cloud-border-highlight);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 5. 六篇文章卡片 (Articles) */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background: var(--cloud-card);
  border: 1px solid var(--cloud-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
}

.article-card:hover {
  border-color: var(--cloud-border-highlight);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 0.75rem;
}

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

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

.article-card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--cloud-border);
  font-size: 0.88rem;
}

/* 6. 评价模块 (真实空态) */
.reviews-section {
  padding: 3.5rem 0 2rem;
}

.reviews-empty-state {
  background: var(--cloud-card);
  border: 1px dashed var(--cloud-border);
  border-radius: var(--radius-lg);
  padding: 3rem 1.5rem;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.empty-icon {
  font-size: 2.2rem;
  color: var(--sky-primary);
  margin-bottom: 1rem;
}

.empty-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.empty-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

/* 7. FAQ 手风琴 */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: var(--cloud-card);
  border: 1px solid var(--cloud-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item:hover {
  border-color: var(--cloud-border-highlight);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  min-height: 44px;
}

.faq-icon {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--sky-primary);
  transition: transform 0.2s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 1.5rem 1.25rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
}

/* 文章详情页排版 */
.article-header {
  padding: 3rem 0 2rem;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.article-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-main);
  margin: 1rem 0;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.breadcrumbs {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-bottom: 1rem;
}

.breadcrumbs a {
  color: var(--text-muted);
}

.breadcrumbs a:hover {
  color: var(--sky-primary);
}

.article-body {
  max-width: 820px;
  margin: 0 auto;
  background: var(--cloud-card);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--cloud-border);
  box-shadow: var(--shadow-sm);
  font-size: 1.05rem;
  line-height: 1.8;
  color: #1e293b;
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 700;
  margin: 2.2rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--sky-lighter);
  color: var(--text-main);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 1.75rem 0 0.75rem;
  color: var(--text-main);
}

.article-body p {
  margin-bottom: 1.35rem;
}

.article-body ul, 
.article-body ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-callout {
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  margin: 1.75rem 0;
  font-size: 0.95rem;
  line-height: 1.65;
}

.callout-note {
  background: #f0f9ff;
  border-left: 4px solid var(--sky-primary);
  color: #0369a1;
}

.callout-warning {
  background: #fffbeb;
  border-left: 4px solid var(--sky-gold);
  color: #92400e;
}

.callout-important {
  background: #f8fafc;
  border-left: 4px solid #64748b;
  color: #334155;
}

/* 响应式表格外壳 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 1.75rem 0;
  border: 1px solid var(--cloud-border);
  border-radius: var(--radius-md);
  background: var(--cloud-card);
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

thead {
  background: var(--sky-lighter);
  border-bottom: 1px solid var(--cloud-border);
}

th {
  padding: 0.85rem 1rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--cloud-border);
  color: var(--text-muted);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover td {
  background: rgba(240, 249, 255, 0.4);
}

pre {
  max-width: 100%;
  overflow-x: auto;
  background: #f1f5f9;
  padding: 1rem;
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  -webkit-overflow-scrolling: touch;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88em;
  background: #f1f5f9;
  padding: 0.2em 0.4em;
  border-radius: 4px;
  color: #0369a1;
}

pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* 文章底部导航与推荐 */
.article-footer-nav {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--cloud-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* 页脚 Footer */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--cloud-border);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-top: 1rem;
  max-width: 360px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--cloud-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 1rem;
}

/* 移动端底部固定浮动条 (触控优化，留出安全边距) */
.mobile-sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--cloud-border);
  padding-bottom: env(safe-area-inset-bottom);
  padding: 0.5rem 1rem calc(0.5rem + env(safe-area-inset-bottom, 0px));
  z-index: 99;
  box-shadow: 0 -4px 12px rgba(15, 23, 42, 0.08);
}

.mobile-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  max-width: var(--container-max-width);
  margin: 0 auto;
  width: 100%;
}

.mobile-cta-info {
  display: flex;
  flex-direction: column;
}

.mobile-cta-info strong {
  font-size: 0.92rem;
  color: var(--text-main);
}

.mobile-cta-info span {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ==========================================================================
   响应式断点与设备优化 (360px, 390px, 430px, 768px, 1440px)
   ========================================================================== */

@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .hero-section {
    padding: 3rem 0 2rem;
  }

  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 2rem;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-sky-card {
    padding: 1.25rem 1rem;
  }

  .trust-grid {
    grid-template-columns: 1fr;
    gap: 0.65rem;
  }

  .trust-item {
    font-size: 0.84rem;
    justify-content: flex-start;
  }

  .header-actions .btn {
    display: none;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #ffffff;
    border-bottom: 1px solid var(--cloud-border);
    flex-direction: column;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
  }

  .nav-menu.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .path-locator-box {
    padding: 1.25rem 1rem;
  }

  .path-steps-nav {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .path-step-btn:last-child {
    grid-column: span 1;
  }

  .path-details-card {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    padding: 1.25rem 1rem;
  }

  .plans-grid,
  .regions-grid,
  .articles-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .plan-card {
    padding: 1.5rem;
  }

  .article-body {
    padding: 1.5rem 1.25rem;
    font-size: 1rem;
  }

  .article-title {
    font-size: 1.65rem;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .mobile-sticky-cta {
    display: block;
  }

  .mobile-cta-info strong {
    font-size: 0.85rem;
  }

  .mobile-cta-info span {
    font-size: 0.72rem;
  }

  body {
    padding-bottom: calc(65px + env(safe-area-inset-bottom, 0px));
  }
}

@media (max-width: 430px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .plan-card {
    padding: 1.25rem;
  }

  .faq-question {
    padding: 1rem 1.15rem;
    font-size: 0.95rem;
  }

  .faq-answer {
    padding: 0 1.15rem 1.15rem;
    font-size: 0.9rem;
  }
}

/* 无障碍与减弱动态设置 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}