/* ==========================================================================
   CTC 金龙鱼机场网 (xn--ctc-wq5jp45bvqe.shop) 官方极速落地页核心样式表
   技术标准：纯原生 CSS · 零外部重型库 · 毫秒级秒开 · 金龙专属黑金科技美学
   ========================================================================== */

:root {
  /* 基础主色彩体系：曜石黑金 + 赛博天青 */
  --bg-main: #060a12;
  --bg-secondary: #0b1220;
  --bg-card: rgba(14, 23, 38, 0.75);
  --bg-card-hover: rgba(20, 32, 54, 0.88);
  --bg-card-featured: rgba(26, 36, 56, 0.92);

  /* 金龙主色与渐变辉光 */
  --gold-primary: #f59e0b;
  --gold-light: #fbbf24;
  --gold-dark: #d97706;
  --gold-glow: rgba(245, 158, 11, 0.35);

  /* 辅助天青科技色 */
  --cyan-accent: #0ea5e9;
  --cyan-light: #38bdf8;
  --cyan-glow: rgba(56, 189, 248, 0.3);

  /* 翠绿高可用色 */
  --emerald: #10b981;
  --emerald-light: #34d399;

  /* 文字颜色层级 */
  --text-main: #ffffff;
  --text-body: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* 边框与阴影 */
  --border-subtle: rgba(148, 163, 184, 0.12);
  --border-hover: rgba(245, 158, 11, 0.4);
  --border-gold: rgba(245, 158, 11, 0.6);
  --border-cyan: rgba(56, 189, 248, 0.5);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-gold: 0 0 30px rgba(245, 158, 11, 0.28);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-main);
}

/* 动态背景层 (纯原生 CSS 硬件加速动画，毫秒级即时渲染) */
.dynamic-bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* 动态网格背景 */
.bg-grid {
  position: absolute;
  inset: -100px;
  background-image: 
    linear-gradient(to right, rgba(245, 158, 11, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(56, 189, 248, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(circle at 50% 40%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, black 30%, transparent 80%);
  animation: gridShift 30s linear infinite;
}

@keyframes gridShift {
  0% { transform: translateY(0); }
  100% { transform: translateY(50px); }
}

/* 动态悬浮发光光球 (Aurora Orbs) */
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.28;
  will-change: transform;
}

.orb-gold-1 {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, #f59e0b 0%, #d97706 70%, transparent 100%);
  top: -100px;
  right: -100px;
  animation: floatOrb1 18s ease-in-out infinite alternate;
}

.orb-cyan-2 {
  width: 580px;
  height: 580px;
  background: radial-gradient(circle, #0ea5e9 0%, #0369a1 70%, transparent 100%);
  bottom: 10%;
  left: -150px;
  animation: floatOrb2 22s ease-in-out infinite alternate;
}

.orb-gold-3 {
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, #fbbf24 0%, #b45309 70%, transparent 100%);
  top: 45%;
  right: 15%;
  animation: floatOrb3 16s ease-in-out infinite alternate;
}

@keyframes floatOrb1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, 90px) scale(1.12); }
  100% { transform: translate(-140px, 40px) scale(0.95); }
}

@keyframes floatOrb2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(100px, -70px) scale(1.08); }
  100% { transform: translate(60px, -120px) scale(0.92); }
}

@keyframes floatOrb3 {
  0% { transform: translate(0, 0) scale(0.9); }
  50% { transform: translate(-60px, -80px) scale(1.15); }
  100% { transform: translate(50px, 60px) scale(1); }
}

/* 动态流光粒子画布 (若浏览器支持 Canvas 则微粒交互，否则优雅回退) */
#bg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* 页面包装容器 */
.page-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 渐变文本 */
.text-gradient-gold {
  background: linear-gradient(135deg, #ffe066 0%, #f59e0b 50%, #d97706 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-cyan {
  background: linear-gradient(135deg, #38bdf8 0%, #0ea5e9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.text-gradient-dual {
  background: linear-gradient(135deg, #ffe066 0%, #f59e0b 40%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* ==========================================================================
   按钮规范体系 (全站 CTA 均带 target="_blank" rel="nofollow")
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  border-radius: 12px;
  padding: 13px 26px;
  font-size: 0.98rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  line-height: 1.2;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 50%, #d97706 100%);
  color: #0b0f19;
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(245, 158, 11, 0.6);
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(14, 23, 38, 0.8);
  color: #e2e8f0;
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(26, 38, 62, 0.95);
  border-color: var(--cyan-light);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 0.88rem;
  border-radius: 9px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
  border-radius: 14px;
}

.btn-pulse {
  position: relative;
  overflow: hidden;
}

.btn-pulse::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  animation: btnShimmer 3.2s infinite;
}

@keyframes btnShimmer {
  0% { left: -100%; }
  40% { left: 100%; }
  100% { left: 100%; }
}

/* ==========================================================================
   顶部导航栏 Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 10, 18, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.logo-link:hover {
  opacity: 0.92;
}

.site-logo-img {
  height: 48px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: var(--gold-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: 8px;
}

/* ==========================================================================
   Hero 首屏板块
   ========================================================================== */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 999px;
  margin-bottom: 24px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--emerald);
  box-shadow: 0 0 10px var(--emerald);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.badge-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold-light);
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.22;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-body);
  max-width: 880px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

/* 核心指标统计条 */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1060px;
  margin: 0 auto;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 20px 16px;
  backdrop-filter: blur(8px);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 4px;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   通用 Section 头部规范
   ========================================================================== */
.section-padding {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 840px;
  margin: 0 auto 54px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--cyan-light);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.68;
}

/* ==========================================================================
   价格方案区 (Pricing Section)
   【用户严格要求：所有价格要同排展示 · 4 大方案水平对齐】
   ========================================================================== */
.pricing-section {
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(11, 18, 32, 0.6) 50%, transparent 100%);
}

.pricing-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 32px 24px 28px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.7);
}

.pricing-card.featured {
  background: var(--bg-card-featured);
  border: 2px solid var(--gold-primary);
  box-shadow: var(--shadow-gold);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-6px);
}

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #fbbf24, #d97706);
  color: #0b0f19;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.6px;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}

.pricing-header {
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.45;
  min-height: 42px;
}

.pricing-price-wrap {
  margin-bottom: 24px;
}

.price-main {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--gold-light);
}

.price-value {
  font-size: 2.7rem;
  font-weight: 900;
  color: #ffffff;
  font-family: var(--font-mono);
  line-height: 1;
}

.price-cycle {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.price-sub-calc {
  font-size: 0.8rem;
  color: var(--cyan-light);
  margin-top: 6px;
  font-weight: 500;
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-body);
  line-height: 1.4;
}

.pricing-feature-item strong {
  color: #ffffff;
}

.icon-check {
  color: var(--gold-light);
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-cta {
  width: 100%;
}

/* ==========================================================================
   核心特色功能网格 (Features)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 32px 26px;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

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

/* ==========================================================================
   全球专线节点与实时延迟测速 (Global Nodes Table)
   ========================================================================== */
.nodes-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  overflow: hidden;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.nodes-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.nodes-table th {
  background: rgba(11, 18, 32, 0.9);
  padding: 16px 20px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  border-bottom: 1px solid var(--border-subtle);
}

.nodes-table td {
  padding: 16px 20px;
  font-size: 0.92rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
  color: var(--text-body);
}

.nodes-table tr:hover td {
  background: rgba(245, 158, 11, 0.04);
}

.node-name {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: #ffffff;
}

.node-flag {
  font-size: 1.3rem;
}

.node-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--emerald-light);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.latency-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--emerald-light);
}

/* ==========================================================================
   客户端生态一键支持 (Clients Ecosystem)
   ========================================================================== */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  transition: all var(--transition-fast);
}

.client-item:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-light);
}

.client-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.client-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 6px;
}

.client-platform {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   精选 SEO 深度评测文章板块 (Articles Section)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.82rem;
  color: var(--cyan-light);
}

.article-tag {
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.3);
  padding: 3px 10px;
  border-radius: 6px;
  font-weight: 600;
}

.article-date {
  color: var(--text-dim);
}

.article-card-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color var(--transition-fast);
}

.article-card:hover .article-card-title {
  color: var(--gold-light);
}

.article-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--gold-light);
}

/* ==========================================================================
   用户评价口碑板块 (User Testimonials)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
}

.review-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
}

.review-stars {
  color: #fbbf24;
  margin-bottom: 14px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

.review-user-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f59e0b, #0ea5e9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #0b0f19;
  font-size: 1rem;
}

.user-info-name {
  font-size: 0.94rem;
  font-weight: 700;
  color: #ffffff;
}

.user-info-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   常见问题 FAQ 板块
   ========================================================================== */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 26px;
  transition: border-color var(--transition-fast);
}

.faq-card:hover {
  border-color: var(--border-hover);
}

.faq-question {
  font-size: 1.08rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.faq-q-icon {
  color: var(--gold-light);
  font-weight: 800;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.faq-answer {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.68;
  padding-left: 24px;
}

/* ==========================================================================
   权威行业外链板块 (Authoritative Links)
   ========================================================================== */
.links-section {
  background: rgba(11, 18, 32, 0.4);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 50px 0;
}

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

.link-block {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 18px;
}

.link-block h4 {
  font-size: 0.95rem;
  color: #ffffff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.link-block p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.link-block a {
  color: var(--cyan-light);
  text-decoration: none;
  font-weight: 500;
  word-break: break-all;
}

.link-block a:hover {
  text-decoration: underline;
  color: var(--gold-light);
}

/* ==========================================================================
   底栏 Footer
   ========================================================================== */
.site-footer {
  background: #04070d;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  margin-top: 16px;
  line-height: 1.7;
  max-width: 380px;
}

.footer-col h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* ==========================================================================
   响应式断点适配 (Responsive Design)
   ========================================================================== */
@media (max-width: 1100px) {
  /* 平板横屏：价格卡片保持同排，允许横向滚动或微调字体 */
  .pricing-row {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }
  .pricing-card {
    padding: 24px 16px 20px;
  }
  .price-value {
    font-size: 2.2rem;
  }
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .links-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  /* 移动端/平板小屏下，价格行保持在单行横向滑装容器中（确保桌面和宽屏严格同排，移动端滑动对比） */
  .pricing-row-wrap {
    overflow-x: auto;
    padding-bottom: 16px;
    -webkit-overflow-scrolling: touch;
  }
  .pricing-row {
    min-width: 900px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }
  .links-grid {
    grid-template-columns: 1fr;
  }
  .clients-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}