/* ==========================================================================
   牧牛云网 (muniu.sbs) - 极速原生无依赖全局样式表
   零重型JS框架 · 纯原生 CSS · 毫秒级秒开渲染 · 科技暗夜极客美学
   ========================================================================== */

:root {
  --bg-main: #060c16;
  --bg-surface: #0a1324;
  --bg-card: rgba(13, 24, 44, 0.78);
  --bg-card-hover: rgba(18, 33, 60, 0.92);
  --bg-glass: rgba(10, 19, 36, 0.85);

  --border-subtle: rgba(16, 185, 129, 0.16);
  --border-glow: rgba(6, 182, 212, 0.45);
  --border-hover: rgba(59, 130, 246, 0.65);

  --brand-emerald: #10b981;
  --brand-cyan: #06b6d4;
  --brand-blue: #3b82f6;
  --brand-glow: #34d399;
  --accent-gold: #f59e0b;
  --accent-purple: #8b5cf6;
  --accent-ice-yellow: #fde047;
  --accent-ice-lemon: #fef08a;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-highlight: #38bdf8;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 20px -5px rgba(6, 182, 212, 0.1);
  --shadow-glow: 0 0 35px -5px rgba(16, 185, 129, 0.35);

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

  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #0b1c36 0%, #060c16 75%);
}

/* 全屏动态背景 Canvas 层 */
#dynamic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}

/* 页面主体内容容器层 */
.site-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 通用栅格与版心 */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* 排版与色彩实用类 */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.gradient-text {
  background: linear-gradient(135deg, #34d399 0%, #a7f3d0 25%, #fef08a 60%, #fde047 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-gold {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 按钮通用体系规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #10b981 0%, #84cc16 35%, #fde047 80%, #facc15 100%);
  color: #060c16;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, #34d399 0%, #a3e635 35%, #fef08a 80%, #fde047 100%);
  box-shadow: 0 8px 26px rgba(253, 224, 71, 0.58);
  color: #000000;
  filter: brightness(1.08);
}

.btn-secondary {
  background: rgba(16, 185, 129, 0.1);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}

.btn-secondary:hover {
  background: rgba(16, 185, 129, 0.2);
  border-color: #34d399;
  transform: translateY(-2px);
  color: #ffffff;
}

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

.btn-glow::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    60deg,
    transparent,
    rgba(255, 255, 255, 0.25),
    transparent
  );
  transform: rotate(30deg);
  animation: btnShine 4s infinite linear;
}

@keyframes btnShine {
  0% { transform: translateX(-100%) rotate(30deg); }
  25%, 100% { transform: translateX(100%) rotate(30deg); }
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 32px;
  font-size: 17px;
  border-radius: var(--radius-md);
}

/* ==========================================================================
   顶部导航栏 (左上方要有这个logo)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-brand img {
  height: 44px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 26px;
}

.nav-link {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover,
.nav-link.active {
  color: #38bdf8;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #10b981, #fde047);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* ==========================================================================
   Hero 首屏横幅区
   ========================================================================== */
.hero-section {
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.35);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  color: #38bdf8;
  margin-bottom: 22px;
}

.hero-title {
  font-size: clamp(32px, 5.2vw, 54px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 34px;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 45px;
}

.hero-guarantee {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: var(--text-dim);
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.guarantee-item svg {
  color: var(--brand-emerald);
}

/* ==========================================================================
   数据统计横幅
   ========================================================================== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: rgba(13, 24, 44, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 26px 20px;
  margin-top: 35px;
  backdrop-filter: blur(10px);
}

.stat-item {
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-item:last-child {
  border-right: none;
}

.stat-num {
  font-size: 32px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #ffffff;
  margin-bottom: 4px;
}

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

/* ==========================================================================
   通用 Section 规范
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

.section-alt {
  background: rgba(8, 16, 30, 0.5);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--brand-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.section-title {
  font-size: clamp(26px, 3.8vw, 38px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   核心优势卡片网格
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card);
  background: var(--bg-card-hover);
}

.feature-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.feature-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   价格套餐区域 - 严格规范：所有价格要同排
   4个价格套餐在同一个网格行中水平整齐排布，高矮一致，按钮在底端对齐
   ========================================================================== */
.pricing-section {
  position: relative;
}

/* 4列水平同排容器 */
.pricing-row-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 32px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: 0 16px 36px -10px rgba(0, 0, 0, 0.6), 0 0 25px -5px rgba(6, 182, 212, 0.2);
}

/* 爆款白银高亮卡片 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.15) 0%, rgba(13, 24, 44, 0.95) 100%);
  border: 2px solid var(--brand-emerald);
  box-shadow: 0 12px 35px -5px rgba(16, 185, 129, 0.35);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 18px 45px -5px rgba(16, 185, 129, 0.5);
}

.plan-tier-badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  margin-bottom: 12px;
}

.pricing-card.featured .plan-tier-badge {
  background: var(--brand-emerald);
  color: #042f1a;
  font-weight: 800;
}

.plan-name {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 6px;
}

.plan-target {
  font-size: 12.5px;
  color: var(--text-dim);
  min-height: 38px;
  margin-bottom: 18px;
  line-height: 1.5;
}

/* 核心价格数字区域 - 严格同排基准对齐 */
.pricing-figure {
  display: flex;
  align-items: baseline;
  gap: 4px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 20px;
}

.currency-symbol {
  font-size: 22px;
  font-weight: 700;
  color: var(--brand-cyan);
}

.price-num {
  font-size: 44px;
  font-weight: 900;
  font-family: var(--font-mono);
  line-height: 1;
  color: #ffffff;
}

.pricing-card.featured .price-num {
  color: var(--brand-glow);
}

.price-cycle {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-left: 2px;
}

/* 特权清单 */
.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 26px;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 13.5px;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.pricing-features li::before {
  content: '✓';
  color: var(--brand-emerald);
  font-weight: 800;
  font-size: 14px;
}

.pricing-features li strong {
  color: var(--text-main);
}

/* 卡片底端按钮与说明 */
.pricing-card-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pricing-card-footer .btn {
  width: 100%;
}

.pricing-tip {
  font-size: 11.5px;
  text-align: center;
  color: var(--text-dim);
}

/* ==========================================================================
   测速矩阵与实时节点表格
   ========================================================================== */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 10px;
  backdrop-filter: blur(10px);
}

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

.node-table th {
  padding: 14px 16px;
  font-weight: 700;
  color: var(--brand-cyan);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(6, 182, 212, 0.05);
  white-space: nowrap;
}

.node-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  white-space: nowrap;
}

.node-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-main);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
}

.status-badge.online {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.status-badge.online::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}

/* ==========================================================================
   客户端生态一键导入
   ========================================================================== */
.client-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: all var(--transition-normal);
}

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

.client-icon {
  font-size: 36px;
  margin-bottom: 12px;
}

.client-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.client-desc {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* ==========================================================================
   文章专栏列表区 (SEO 核心支撑)
   ========================================================================== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

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

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.article-category {
  color: var(--brand-emerald);
  font-weight: 600;
}

.article-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
}

.article-title a:hover {
  color: var(--brand-cyan);
}

.article-excerpt {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
  font-size: 13px;
  color: var(--brand-cyan);
  font-weight: 600;
}

/* ==========================================================================
   真实用户评价区 (Testimonials)
   ========================================================================== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 10px 25px -5px rgba(245, 158, 11, 0.15);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #10b981, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: #ffffff;
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

.user-verified {
  color: #38bdf8;
  font-size: 13px;
}

.user-role {
  font-size: 12px;
  color: var(--text-dim);
}

.review-stars {
  color: #fbbf24;
  margin-bottom: 10px;
  font-size: 14px;
}

.review-content {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 14px;
}

.review-tag {
  align-self: flex-start;
  font-size: 11.5px;
  color: #34d399;
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 10px;
  border-radius: 6px;
}

/* ==========================================================================
   常见问题 FAQ 手风琴
   ========================================================================== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item.active {
  border-color: var(--border-glow);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.15);
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  padding: 18px 22px;
  color: var(--text-main);
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  font-size: 20px;
  transition: transform var(--transition-fast);
  color: var(--brand-cyan);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 22px;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

/* ==========================================================================
   高权重权威外链推荐资源箱
   ========================================================================== */
.external-links-box {
  background: rgba(13, 24, 44, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 50px;
}

.external-links-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.ext-link {
  font-size: 13px;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition-fast);
}

.ext-link:hover {
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.4);
  background: rgba(56, 189, 248, 0.08);
}

/* ==========================================================================
   底栏 Footer
   ========================================================================== */
.site-footer {
  background: #040810;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 30px;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 45px;
}

.footer-brand p {
  margin-top: 14px;
  max-width: 320px;
  line-height: 1.6;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}

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

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   响应式断点适配 - 严格保障桌面端同排，移动端优雅自适应
   ========================================================================== */
@media (max-width: 1100px) {
  .pricing-row-container {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

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

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

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

  .stat-item:nth-child(2) {
    border-right: none;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 74px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .menu-toggle {
    display: block;
  }

  .pricing-row-container,
  .feature-grid,
  .article-grid,
  .review-grid,
  .client-grid {
    grid-template-columns: 1fr;
  }

  .stats-bar {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .stat-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 12px;
  }

  .stat-item:last-child {
    border-bottom: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}