/* ============================================
   IP代理品牌官网模板 — 主样式文件
   通过CSS变量控制配色，brand.css覆盖即可换肤
   ============================================ */

/* 字体回退至系统字体，避免国内访问Google Fonts超时 */

/* === CSS变量（默认主题） === */
:root {
  /* 主色系 */
  --primary: #1890ff;
  --primary-light: #40a9ff;
  --primary-dark: #096dd9;
  --primary-bg: #e6f7ff;
  --primary-rgb: 24, 144, 255;

  /* Hero 背景 */
  --hero-bg-start: #0a1628;
  --hero-bg-end: #1a3a5c;
  --hero-accent: #00d4ff;

  /* 辅助强调色（品牌站通过 brand.css 覆盖） */
  --accent: #ff6b35;
  --accent-rgb: 255, 107, 53;
  --accent-dark: #e05520;
  --success: #10b981;
  --warning: #fbbf24;
  --danger: #ef4444;

  /* 文字 & 背景 */
  --text-primary: #1a1a1a;
  --text-secondary: #555555;
  --text-light: #999999;
  --bg-white: #ffffff;
  --bg-light: #f5f7fa;
  --bg-dark: #0f1923;
  --border-color: #e8e8e8;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.05);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.16);
  --shadow-glow: 0 0 32px rgba(var(--primary-rgb), 0.35);
  --shadow-accent: 0 0 24px rgba(var(--accent-rgb), 0.45);

  /* 动效 */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* 间距系统（非线性） */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  --max-width: 1200px;
  --header-height: 70px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s;
}

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

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* === 通用板块标题 === */
.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
}

/* ============================================
   1. 顶部导航 Header
   ============================================ */
.header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s;
}

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

.logo a {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo img {
  height: 42px;
  width: auto;
}

.nav-menu {
  display: flex;
  gap: 8px;
}

.nav-menu a {
  display: block;
  padding: 8px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: var(--radius-md);
  transition: all 0.3s;
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
  background: var(--primary-bg);
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

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

.btn-login {
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: var(--radius-md);
  transition: all 0.3s;
}

.btn-login:hover {
  color: var(--primary);
  background: var(--primary-bg);
}

.btn-register {
  padding: 8px 24px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-md);
  transition: all 0.3s;
  box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.3);
}

.btn-register:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.4);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   2. Hero 横幅区
   ============================================ */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--hero-bg-start), var(--hero-bg-end));
  overflow: hidden;
  padding: 80px 0 60px;
  min-height: 600px;
  display: flex;
  align-items: center;
}

/* Hero背景动效 */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(var(--primary-rgb), 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 20%, rgba(var(--primary-rgb), 0.1) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-5%, 5%) scale(1.1); }
}

/* 浮动光点 */
.hero::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--hero-accent) 0%, transparent 70%);
  opacity: 0.08;
  top: 10%;
  right: 15%;
  animation: floatOrb 6s ease-in-out infinite alternate;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-30px, 30px); }
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: 40px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero-text h1 .brand-highlight {
  color: var(--hero-accent);
}

.hero-text .hero-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
  margin-bottom: 32px;
}

/* Hero特性小卡片 */
.hero-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 36px;
}

.hero-feature-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(255,255,255,0.13);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: var(--radius-md);
  backdrop-filter: blur(10px);
  transition: all 0.3s;
}

.hero-feature-card:hover {
  background: rgba(255,255,255,0.20);
  border-color: rgba(255,255,255,0.35);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

.hero-feature-card .feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--hero-accent));
  border-radius: var(--radius-sm);
  font-size: 18px;
  color: #fff;
  flex-shrink: 0;
}

/* 直接子图标（无 .feature-icon 包裹的场景） */
.hero-feature-card > i {
  font-size: 22px;
  color: var(--hero-accent, #f59e0b);
  filter: drop-shadow(0 0 6px rgba(251,191,36,0.55));
  flex-shrink: 0;
  width: 28px;
  text-align: center;
}

.hero-feature-card strong {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.02em;
}

.hero-feature-card span {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--hero-accent, #fbbf24);
  letter-spacing: 0.03em;
  margin-top: 2px;
}

.hero-feature-card .feature-text {
  font-size: 14px;
  color: rgba(255,255,255,0.9);
  font-weight: 500;
}

/* Hero CTA按钮 */
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.4);
  transition: all 0.3s;
}

.btn-cta-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(var(--primary-rgb), 0.5);
}

.btn-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: transparent;
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: var(--radius-lg);
  transition: all 0.3s;
}

.btn-cta-secondary:hover {
  color: #fff;
  border-color: #fff;
  background: rgba(255,255,255,0.1);
}

/* Hero右侧图片 */
.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  max-width: 100%;
  max-height: 450px;
  object-fit: contain;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3));
  animation: heroFloat 4s ease-in-out infinite alternate;
}

@keyframes heroFloat {
  0% { transform: translateY(0); }
  100% { transform: translateY(-15px); }
}

/* === 数据统计条 === */
.stats-bar {
  background: rgba(255,255,255,0.05);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 30px 0;
  position: relative;
  z-index: 2;
}

.hero .stats-bar {
  margin-top: 40px;
}

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

.stat-item .stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--hero-accent);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-item .stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}

/* ============================================
   3. 产品介绍
   ============================================ */
.product-intro {
  padding: 80px 0;
  background: var(--bg-white);
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.product-text .section-title {
  text-align: left;
  margin-bottom: 16px;
}

.product-text .section-subtitle {
  text-align: left;
  margin-bottom: 24px;
}

.product-highlights {
  display: flex;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.highlight-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
}

.highlight-tag i {
  font-size: 16px;
}

.product-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.product-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================
   4. 核心优势
   ============================================ */
.features {
  padding: 80px 0;
  background: var(--bg-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-card .card-icon,
.feature-card .feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-md);
  font-size: 24px;
  color: #fff;
  margin-bottom: 20px;
  flex-shrink: 0;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-card > p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-list li {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================
   5. 兼容软件展示
   ============================================ */
.compatibility {
  padding: 60px 0;
  background: var(--bg-white);
}

.compat-scroll {
  display: flex;
  gap: 40px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  padding: 20px 0;
}

.compat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: transform 0.3s;
}

.compat-item:hover {
  transform: translateY(-4px);
}

.compat-item .compat-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  font-size: 28px;
  color: var(--primary);
  border: 1px solid var(--border-color);
}

.compat-item span {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   6. 套餐预览
   ============================================ */
.packages-preview {
  padding: 80px 0;
  background: var(--bg-light);
}

.packages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.package-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
  position: relative;
  display: flex;
  flex-direction: column;
}

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

.package-card.featured,
.package-card.package-featured {
  border-color: var(--primary);
  box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.15);
  overflow: visible;
  transform: scale(1.025);
  z-index: 1;
  padding-top: 26px;
}

.package-header {
  padding: 24px 24px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.package-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.package-badge {
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 20px;
}

.package-badge.badge-hot {
  background: linear-gradient(135deg, #ff6b35, #ff8f5e);
}

.package-badge.badge-premium {
  background: linear-gradient(135deg, #7c3aed, #a78bfa);
}

.package-body {
  padding: 0 24px 24px;
  flex: 1;
}

.package-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.package-feature:last-child {
  border-bottom: none;
}

.package-feature i {
  color: var(--primary);
  width: 18px;
  text-align: center;
}

.package-feature span {
  font-size: 14px;
  color: var(--text-secondary);
}

.price-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(var(--primary-rgb), 0.18);
}

.price-label {
  font-size: 14px;
  color: var(--text-secondary);
}

.price-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
}

.price-card-color {
  border-top: 4px solid var(--primary);
}

.color-blue {
  border-top-color: #3b82f6;
}

.color-green {
  border-top-color: #10b981;
}

.color-cyan {
  border-top-color: #06b6d4;
}

.color-purple {
  border-top-color: #8b5cf6;
}

.color-orange {
  border-top-color: #f97316;
}

.color-red {
  border-top-color: #ef4444;
}

.package-footer {
  padding: 16px 24px 24px;
}

.btn-buy {
  display: block;
  width: 100%;
  padding: 12px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-bg);
  border-radius: var(--radius-md);
  transition: all 0.3s;
}

.btn-buy:hover {
  color: #fff;
  background: var(--primary);
}

.package-card.featured .btn-buy {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.packages-more {
  text-align: center;
}

.packages-more a {
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.packages-more a:hover {
  gap: 10px;
}

/* ============================================
   首页热门套餐卡片 — 内容布局样式
   ============================================ */
.packages-grid .package-card {
  padding: 24px;
}

.package-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 12px 0;
}

.price-amount {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1;
}

.price-unit {
  font-size: 14px;
  color: var(--text-secondary);
}

.package-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  margin: 14px 0 18px;
}

.package-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.package-features li i {
  color: var(--success, #10b981);
  font-size: 12px;
  flex-shrink: 0;
  width: 16px;
  text-align: center;
}

.btn-package {
  display: block;
  width: 100%;
  padding: 12px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-bg);
  border-radius: var(--radius-md);
  transition: all 0.3s;
  text-decoration: none;
}

.btn-package:hover {
  color: #fff;
  background: var(--primary);
}

.package-card.package-featured .btn-package {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.package-card.package-featured .btn-package:hover {
  opacity: 0.9;
}

.price-save-tag {
  background: #fff7e6;
  color: #c07000;
  border: 1px solid #ffe0a0;
  border-radius: 6px;
  font-size: 0.78rem;
  padding: 5px 10px;
  margin: 6px 0 10px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.price-save-tag i {
  color: #e09000;
  flex-shrink: 0;
}

.price-badge-hot {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #ff6b35, #ff4500);
  color: white;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(255, 107, 53, 0.4);
  z-index: 2;
}

.price-social-proof {
  text-align: center;
  font-size: 13px;
  color: var(--text-light);
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.price-social-proof i {
  font-size: 12px;
  color: var(--text-light);
}

/* ============================================
   7. 技术规格
   ============================================ */
.specs {
  padding: 80px 0;
  background: var(--bg-white);
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.spec-card {
  padding: 28px 24px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all 0.3s;
}

.spec-card:hover {
  background: var(--bg-white);
  box-shadow: var(--shadow-md);
}

.spec-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.spec-card h3 i {
  color: var(--primary);
  font-size: 20px;
}

.spec-card ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.spec-card li {
  font-size: 14px;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
}

.spec-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-size: 12px;
  font-weight: 700;
}

/* ============================================
   8. 使用流程
   ============================================ */
.process {
  padding: 80px 0;
  background: var(--bg-light);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 20%;
  right: 20%;
  height: 2px;
  background: linear-gradient(to right, var(--primary), var(--primary-light), var(--primary));
  opacity: 0.3;
}

.step-card {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-number {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 20px;
  box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.3);
}

.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   9. 用户评价
   ============================================ */
.testimonials {
  padding: 80px 0;
  background: var(--bg-white);
}

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

.testimonial-card {
  padding: 28px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.testimonial-stars {
  color: var(--warning);
  font-size: 14px;
  margin-bottom: 14px;
  display: flex;
  gap: 2px;
}

.testimonial-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
}

.author-info .author-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.author-info .author-role {
  font-size: 12px;
  color: var(--text-light);
}

/* ============================================
   10. FAQ常见问题
   ============================================ */
.faq {
  padding: 80px 0;
  background: var(--bg-light);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* FAQ 双列布局（价格页专用） */
.faq-list-2col {
  display: grid !important;
  grid-template-columns: 1fr 1fr;
  max-width: 100% !important;
  gap: 12px;
  align-items: start;
}

/* FAQ 区 section-header 间距收紧 */
.faq .section-header {
  margin-bottom: 28px;
}

@media (max-width: 768px) {
  .faq-list-2col {
    grid-template-columns: 1fr;
  }
}

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all 0.3s;
}

.faq-item.active {
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  cursor: pointer;
  user-select: none;
  transition: background 0.3s;
}

.faq-question:hover {
  background: var(--bg-light);
}

.faq-question h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
}

.faq-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: transform 0.3s;
  flex-shrink: 0;
  font-size: 14px;
}

.faq-item.active .faq-toggle {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   11. 新闻动态
   ============================================ */
.news {
  padding: 80px 0;
  background: var(--bg-white);
}

.news-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 36px;
}

.tab-btn {
  padding: 10px 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-light);
  border: none;
  border-radius: 24px;
  cursor: pointer;
  transition: all 0.3s;
}

.tab-btn:hover {
  color: var(--primary);
}

.tab-btn.active {
  color: #fff;
  background: var(--primary);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  transition: all 0.3s;
}

.news-item:hover {
  background: var(--primary-bg);
  transform: translateX(4px);
}

.news-item a {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  flex: 1;
}

.news-item:hover a {
  color: var(--primary);
}

.news-item time {
  font-size: 13px;
  color: var(--text-light);
  flex-shrink: 0;
  margin-left: 20px;
}

.news-more {
  text-align: center;
  margin-top: 30px;
}

.news-more a {
  font-size: 14px;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ============================================
   12. CTA行动号召
   ============================================ */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--hero-bg-start), var(--hero-bg-end));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(var(--primary-rgb), 0.2), transparent 70%);
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 16px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 36px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   13. Footer
   ============================================ */
.footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-bottom: 16px;
}

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

.footer-tags span {
  padding: 4px 12px;
  font-size: 12px;
  background: rgba(255,255,255,0.08);
  border-radius: 4px;
  color: rgba(255,255,255,0.6);
}

.footer-nav a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  padding: 4px 0;
  transition: color 0.3s;
}

.footer-nav a:hover {
  color: var(--primary-light);
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  padding: 6px 0;
}

.footer-contact li i {
  color: var(--primary-light);
  width: 18px;
  text-align: center;
}

/* 免责声明 */
.footer-disclaimer {
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.disclaimer-content {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  line-height: 1.6;
}

.disclaimer-content i {
  color: var(--warning);
  flex-shrink: 0;
  margin-top: 2px;
}

/* 底部版权 */
.footer-bottom {
  padding: 16px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

.footer-bottom a {
  color: rgba(255,255,255,0.45);
}

.footer-bottom a:hover {
  color: var(--primary-light);
}

/* ============================================
   14. 右侧浮动联系栏
   ============================================ */
.sidebar-contact {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-item {
  position: relative;
}

.sidebar-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 20px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all 0.3s;
}

.sidebar-btn:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.sidebar-btn.qq-btn {
  background: #12b7f5;
}

.sidebar-btn.wechat-btn {
  background: #07c160;
}

.sidebar-btn.phone-btn {
  background: var(--primary);
}

.sidebar-btn.top-btn {
  background: var(--text-secondary);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
}

.sidebar-btn.top-btn.visible {
  opacity: 1;
  pointer-events: auto;
}

/* 弹出提示 */
.sidebar-tooltip {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 16px;
  min-width: 180px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  pointer-events: none;
}

.sidebar-item:hover .sidebar-tooltip {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.sidebar-tooltip::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: var(--bg-white);
  box-shadow: 2px -2px 4px rgba(0,0,0,0.05);
}

.tooltip-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.tooltip-text {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.tooltip-qr {
  width: 150px;
  height: 150px;
  margin: 8px auto;
}

.tooltip-qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.tooltip-link {
  display: block;
  text-align: center;
  padding: 8px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  margin-top: 8px;
}

.tooltip-link:hover {
  color: #fff;
  background: var(--primary-dark);
}

/* ============================================
   价格套餐页
   ============================================ */
.page-header {
  background: linear-gradient(135deg, var(--hero-bg-start), var(--hero-bg-end));
  padding: 50px 0;
  text-align: center;
}

.page-header h1 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.page-header p {
  font-size: 16px;
  color: rgba(255,255,255,0.7);
}

.price-section {
  padding: 60px 0;
  background: var(--bg-light);
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

/* 价格页：彩色渐变头部卡片 */
.price-card-color .package-header {
  padding: 20px 24px;
  color: #fff;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.price-card-color .package-header .package-name {
  color: #fff;
  font-size: 18px;
}

.price-card-color .package-header .package-badge {
  background: rgba(255,255,255,0.25);
}

/* 渐变头部颜色 */
.color-blue .package-header   { background: linear-gradient(135deg, #2563eb, #3b82f6); }
.color-green .package-header  { background: linear-gradient(135deg, #059669, #10b981); }
.color-cyan .package-header   { background: linear-gradient(135deg, #0891b2, #22d3ee); }
.color-purple .package-header { background: linear-gradient(135deg, #7c3aed, #a78bfa); }
.color-orange .package-header { background: linear-gradient(135deg, #ea580c, #fb923c); }
.color-gray .package-header   { background: linear-gradient(135deg, #475569, #94a3b8); }
.color-red .package-header    { background: linear-gradient(135deg, #dc2626, #f87171); }
.color-gold .package-header   { background: linear-gradient(135deg, #b45309, #f59e0b); }
.color-teal .package-header   { background: linear-gradient(135deg, #0d9488, #2dd4bf); }

/* 价格行样式 */
.price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
}

.price-row:last-child {
  border-bottom: none;
}

.price-row .price-label {
  color: var(--text-secondary);
}

.price-row .price-value {
  font-weight: 700;
  color: var(--primary);
  font-size: 16px;
}

.price-row .price-value.price-na {
  color: var(--text-light);
  font-weight: 400;
  font-size: 13px;
}

/* 套餐对比表 */
.compare-section {
  padding: 60px 0;
  background: var(--bg-white);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.compare-table thead th {
  background: var(--primary);
  color: #fff;
  padding: 14px 12px;
  text-align: center;
  font-weight: 600;
  font-size: 13px;
  white-space: nowrap;
}

.compare-table tbody td {
  padding: 12px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.compare-table tbody tr:nth-child(even) {
  background: var(--bg-light);
}

.compare-table tbody tr:hover {
  background: var(--primary-bg);
}

.compare-table tbody td:first-child {
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  padding-left: 16px;
}

/* 价格页CTA */
.price-cta {
  padding: 50px 0;
  text-align: center;
  background: var(--bg-light);
}

.price-cta h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.price-cta p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* 热门搜索标签 */
.hot-search {
  margin: 20px 0 10px;
}

.hot-search-title {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 10px;
}

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

.hot-search-tags a,
.hot-search-tags button {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  background: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 13px;
  font-family: inherit;
  line-height: 1.4;
  color: var(--text-secondary);
  cursor: pointer;
  position: static;
  right: auto;
  top: auto;
  width: auto;
  height: auto;
  transform: none;
  transition: all 0.3s;
}

.hot-search-tags a:hover,
.hot-search-tags button:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-bg);
}

/* 文章详情页 */
.article-detail-wrap {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 30px;
  padding: 30px 0 60px;
}

.article-detail {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 40px;
  border: 1px solid var(--border-color);
}

.article-detail h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.4;
}

.article-detail .article-meta {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.article-detail .article-body {
  line-height: 1.8;
  font-size: 15px;
  color: var(--text-secondary);
}

.article-detail .article-body h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 30px 0 14px;
}

.article-detail .article-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 10px;
}

.article-detail .article-body p {
  margin-bottom: 16px;
}

.article-detail .article-body .article-image,
.article-detail .article-body figure {
  margin: 26px auto;
  text-align: center;
}

.article-detail .article-body .article-image img,
.article-detail .article-body figure img {
  display: block;
  width: 100%;
  max-width: 760px;
  height: auto;
  margin: 0 auto;
  border-radius: var(--radius-md);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.article-detail .article-body figcaption {
  margin-top: 10px;
  color: var(--text-light);
  font-size: 13px;
  line-height: 1.6;
}

.article-detail .article-body ul,
.article-detail .article-body ol {
  margin: 0 0 18px 22px;
}

.article-detail .article-body ul {
  list-style: disc;
}

.article-detail .article-body ol {
  list-style: decimal;
}

.article-detail .article-body li {
  margin-bottom: 10px;
}

.article-detail .article-body strong {
  color: var(--text-primary);
}

.article-detail .article-body code {
  padding: 2px 8px;
  background: rgba(var(--primary-rgb), 0.08);
  border-radius: 6px;
  color: var(--primary-dark);
  font-family: "Consolas", "SFMono-Regular", monospace;
  font-size: 14px;
}

.article-detail .article-body pre {
  margin: 0 0 20px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: #0f172a;
  color: #e2e8f0;
  overflow-x: auto;
}

.article-detail .article-body pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.article-detail .article-body a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-detail .article-body a:hover {
  color: var(--primary-dark);
}

.article-detail .article-table-wrap {
  margin: 22px 0 28px;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.06);
}

.article-detail .article-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.65;
}

.article-detail .article-table th,
.article-detail .article-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
  vertical-align: top;
}

.article-detail .article-table th {
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  white-space: nowrap;
}

.article-detail .article-table tbody tr:nth-child(odd) {
  background: var(--primary-bg);
}

.article-detail .article-table tbody tr:last-child td {
  border-bottom: 0;
}

.article-detail .article-register-cta {
  margin: 32px 0;
  padding: 24px;
  border-radius: 12px;
  text-align: center;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 18px 34px rgba(var(--primary-rgb), 0.22);
}

.article-detail .article-register-cta p {
  margin: 0 0 10px;
  color: #fff;
}

.article-detail .article-register-cta .article-register-cta-title {
  font-size: 17px;
  font-weight: 700;
}

.article-detail .article-register-cta .article-register-code {
  font-size: 14px;
  opacity: 0.92;
}

.article-detail .article-register-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 8px;
  padding: 10px 28px;
  border-radius: 8px;
  background: #fff;
  color: var(--primary-dark);
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.14);
}

.article-detail .article-register-cta a:hover {
  color: var(--primary);
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .article-detail .article-table {
    min-width: 560px;
  }

  .article-detail .article-register-cta {
    padding: 20px 16px;
    border-radius: 10px;
  }
}

.article-pagination {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 36px;
}

.article-pagination a,
.article-pagination-disabled {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  background: var(--bg-light);
  transition: all 0.3s;
}

.article-pagination-disabled {
  opacity: 0.58;
  cursor: default;
}

.article-pagination a:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-bg);
}

.article-pagination .label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-light);
  margin-bottom: 6px;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-box {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
}

.sidebar-box h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
}

.sidebar-box .related-list a {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  transition: color 0.3s;
}

.sidebar-box .related-list a:last-child {
  border-bottom: none;
}

.sidebar-box .related-list a:hover {
  color: var(--primary);
}

/* ============================================
   帮助中心页
   ============================================ */
.breadcrumb {
  padding: 16px 0;
  font-size: 14px;
  color: var(--text-light);
}

.breadcrumb a {
  color: var(--text-secondary);
}

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

.breadcrumb .sep {
  margin: 0 8px;
  color: var(--text-light);
}

div.help-search {
  max-width: 500px;
  margin: 0 auto 30px;
  position: relative;
}

div.help-search input {
  width: 100%;
  padding: 14px 48px 14px 20px;
  border: 2px solid var(--border-color);
  border-radius: 28px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.3s;
}

div.help-search input:focus {
  border-color: var(--primary);
}

div.help-search > button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
}

.help-subnav {
  display: flex;
  gap: 8px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.help-subnav a {
  padding: 8px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--bg-light);
  border-radius: 20px;
  transition: all 0.3s;
}

.help-subnav a:hover,
.help-subnav a.active {
  color: #fff;
  background: var(--primary);
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-item {
  display: flex;
  gap: 20px;
  padding: 20px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all 0.3s;
  color: inherit;
  text-decoration: none;
}

.article-item:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.article-thumb {
  width: 200px;
  height: 130px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-light);
}

.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.article-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-light);
}

.article-meta i {
  margin-right: 4px;
}

.article-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   关于我们
   ============================================ */
.about {
  padding: 80px 0;
  background: var(--bg-light);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-stats {
  display: flex;
  gap: 32px;
  margin-top: 28px;
}

.about-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.about-stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.about-stat-label {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 6px;
}

.about-image-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 6列特性网格 */
.features-grid-6 {
  grid-template-columns: repeat(3, 1fr);
}

/* ============================================
   代理IP知识
   ============================================ */
.knowledge {
  padding: 80px 0;
  background: var(--bg-white);
}

.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.knowledge-card {
  background: var(--bg-light);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all 0.3s;
}

.knowledge-card:hover {
  box-shadow: var(--shadow-sm);
}

.knowledge-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  cursor: pointer;
  user-select: none;
  transition: background 0.3s;
}

.knowledge-header:hover {
  background: rgba(var(--primary-rgb), 0.05);
}

.knowledge-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  flex: 1;
  margin: 0;
}

.knowledge-toggle {
  color: var(--text-light);
  font-size: 14px;
  transition: transform 0.3s;
  flex-shrink: 0;
}

.knowledge-card.active .knowledge-toggle {
  transform: rotate(180deg);
  color: var(--primary);
}

.knowledge-card.active {
  border-color: var(--primary);
  background: var(--bg-white);
}

.knowledge-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.knowledge-body p {
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   入场动画
   ============================================ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 32px;
  }

  .hero-features {
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 36px;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-image img {
    max-height: 300px;
  }

  .features-grid,
  .features-grid-6,
  .specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .article-detail-wrap {
    grid-template-columns: 1fr;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .section-title {
    font-size: 24px;
  }

  /* 导航响应式 */
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--bg-white);
    flex-direction: column;
    padding: 16px;
    transform: translateX(-100%);
    transition: transform 0.3s;
    box-shadow: var(--shadow-md);
    gap: 4px;
  }

  .nav-menu.active {
    transform: translateX(0);
  }

  .nav-menu a {
    padding: 12px 16px;
    text-align: center;
  }

  .hamburger {
    display: flex;
  }

  .header-actions .btn-login,
  .header-actions .btn-register {
    display: none;
  }

  /* Hero响应式 */
  .hero {
    padding: 50px 0 30px;
    min-height: auto;
  }

  .hero-text h1 {
    font-size: 26px;
  }

  .hero-text .hero-desc {
    font-size: 15px;
  }

  .hero-features {
    grid-template-columns: 1fr;
  }

  .hero-image {
    display: none;
  }

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

  .stat-item .stat-number {
    font-size: 28px;
  }

  /* 内容区响应式 */
  .product-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .product-text .section-title,
  .product-text .section-subtitle {
    text-align: center;
  }

  .product-highlights {
    justify-content: center;
  }

  .features-grid,
  .features-grid-6,
  .specs-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    justify-content: center;
  }

  .about-image-wrap {
    order: -1;
  }

  .packages-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 40px;
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .process-steps::before {
    display: none;
  }

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

  .cta-section h2 {
    font-size: 24px;
  }

  /* 帮助中心 */
  .article-item {
    flex-direction: column;
  }

  .article-thumb {
    width: 100%;
    height: 180px;
  }

  .article-detail {
    padding: 28px 22px;
  }

  .article-pagination {
    grid-template-columns: 1fr;
  }

  /* 侧边栏 */
  .sidebar-contact {
    right: 10px;
  }

  .sidebar-btn {
    width: 42px;
    height: 42px;
    font-size: 18px;
  }

  .sidebar-tooltip {
    right: 52px;
    min-width: 160px;
  }
}

/* ============================================
   新增断点：640px
   ============================================ */
@media (max-width: 640px) {
  .hero-content {
    gap: 30px;
  }

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

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

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

  .compare-table {
    font-size: 13px;
  }

  .mobile-cta-bar {
    display: flex;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-text h1 {
    font-size: 22px;
  }

  .btn-cta-primary,
  .btn-cta-secondary {
    padding: 12px 24px;
    font-size: 14px;
  }

  .news-tabs {
    flex-wrap: wrap;
  }

  .tab-btn {
    padding: 8px 18px;
    font-size: 13px;
  }
}

/* ============================================
   重构 2.0 — 新增组件样式
   ============================================ */

/* === Header 滚动收缩 === */
.header {
  transition: padding var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
  padding: 10px 0;
  background: rgba(255, 255, 255, 0.96) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
}

.header.scrolled .logo img {
  height: 36px;
}

.header.scrolled .nav-menu a {
  color: var(--text-primary);
}

.header.scrolled .nav-menu a.active,
.header.scrolled .nav-menu a:hover {
  color: var(--primary);
}

/* === Hero 限时活动胶囊 === */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(var(--accent-rgb), 0.15);
  border: 1px solid rgba(var(--accent-rgb), 0.4);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}

/* === Hero 社会证明条 === */
.hero-social-proof {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
}

.hero-social-proof .proof-avatars {
  display: flex;
}

.hero-social-proof .proof-avatar {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255, 255, 255, 0.3);
  background: linear-gradient(135deg, var(--primary), var(--hero-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  margin-right: -6px;
}

/* === TrustBar（信任标志栏）=== */
.trust-bar {
  background: var(--bg-white);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 28px 0;
}

.trust-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.trust-bar-label {
  font-size: 13px;
  color: var(--text-light);
  white-space: nowrap;
  flex-shrink: 0;
}

.trust-logos {
  display: flex;
  align-items: center;
  gap: 24px;
  flex: 1;
  overflow: hidden;
}

.trust-logo-item {
  height: 32px;
  padding: 4px 14px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.05em;
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.trust-logo-item:hover {
  color: var(--primary);
  background: var(--primary-bg);
}

.trust-stats {
  display: flex;
  gap: 32px;
  flex-shrink: 0;
}

.trust-stat-item {
  text-align: center;
}

.trust-stat-num {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.trust-stat-label {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 2px;
}

@media (max-width: 1024px) {
  .trust-bar-inner {
    flex-wrap: wrap;
    gap: 20px;
  }

  .trust-logos {
    flex-wrap: wrap;
    gap: 12px;
  }
}

@media (max-width: 768px) {
  .trust-logos {
    display: none;
  }

  .trust-stats {
    gap: 20px;
  }
}

/* === Testimonials Marquee（无限滚动评价）=== */
.testimonials-marquee-wrap {
  overflow: hidden;
  position: relative;
  padding: 16px 0;
}

.testimonials-marquee-wrap::before,
.testimonials-marquee-wrap::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 120px;
  z-index: 2;
  pointer-events: none;
}

.testimonials-marquee-wrap::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-light), transparent);
}

.testimonials-marquee-wrap::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-light), transparent);
}

.testimonials-track {
  display: flex;
  gap: 20px;
  width: max-content;
  animation: marqueeScroll 40s linear infinite;
}

.testimonials-track:hover {
  animation-play-state: paused;
}

@keyframes marqueeScroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.testimonial-card-m {
  width: 300px;
  flex-shrink: 0;
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: box-shadow var(--transition-base);
}

.testimonial-card-m:hover {
  box-shadow: var(--shadow-md);
}

.testimonial-card-m .tc-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.testimonial-card-m .tc-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.tc-avatar.av-blue   { background: linear-gradient(135deg, #1a5ab8, #4dabff); }
.tc-avatar.av-green  { background: linear-gradient(135deg, #059669, #34d399); }
.tc-avatar.av-orange { background: linear-gradient(135deg, #d97706, #fbbf24); }
.tc-avatar.av-purple { background: linear-gradient(135deg, #7c3aed, #a78bfa); }
.tc-avatar.av-cyan   { background: linear-gradient(135deg, #0891b2, #22d3ee); }
.tc-avatar.av-red    { background: linear-gradient(135deg, #dc2626, #f87171); }

.testimonial-card-m .tc-info .tc-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial-card-m .tc-info .tc-role {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 1px;
}

.testimonial-card-m .tc-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 10px;
  color: #fbbf24;
  font-size: 13px;
}

.testimonial-card-m .tc-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === FAQ 手风琴动画 === */
.faq-item {
  border-bottom: 1px solid var(--border-color);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  gap: 16px;
  user-select: none;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 14px;
  color: var(--text-light);
  transition: transform var(--transition-base), color var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 0 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* === 价格卡片增强 === */
.price-badge-hot {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  box-shadow: var(--shadow-accent);
  letter-spacing: 0.03em;
}

.price-save-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: rgba(var(--accent-rgb), 0.1);
  border: 1px solid rgba(var(--accent-rgb), 0.25);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  margin-top: 6px;
}

.price-social-proof {
  font-size: 12px;
  color: var(--text-light);
  text-align: center;
  margin-top: 10px;
}

.price-social-proof i {
  color: var(--success);
  margin-right: 3px;
}

/* 价格对比锚点区 */
.price-anchor-section {
  background: linear-gradient(135deg, var(--hero-bg-start), var(--hero-bg-end));
  padding: 40px 0;
  margin: 48px 0;
  border-radius: var(--radius-xl);
  text-align: center;
  color: #fff;
}

.price-anchor-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
}

.price-anchor-item .label {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 4px;
}

.price-anchor-item .value {
  font-size: 28px;
  font-weight: 700;
}

.price-anchor-item .value.strikethrough {
  text-decoration: line-through;
  color: rgba(255,255,255,0.4);
  font-size: 22px;
}

.price-anchor-divider {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
}

@media (max-width: 640px) {
  .price-anchor-inner {
    flex-direction: column;
    gap: 20px;
  }
}

/* === 移动端底部固定 CTA 栏 === */
.mobile-cta-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 800;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-color);
  padding: 12px 16px;
  gap: 12px;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.mobile-cta-bar.visible {
  opacity: 1;
  transform: translateY(0);
}

.mobile-cta-consult {
  flex: 1;
  padding: 11px 0;
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  transition: all var(--transition-fast);
}

.mobile-cta-consult:hover {
  background: var(--primary-bg);
}

.mobile-cta-register {
  flex: 1.5;
  padding: 11px 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: var(--radius-md);
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  transition: all var(--transition-fast);
}

.mobile-cta-register:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .mobile-cta-bar {
    display: flex;
  }

  /* 底部留出固定 CTA 栏的空间 */
  footer.footer {
    padding-bottom: 80px;
  }
}

/* === 文章阅读进度条 === */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--hero-accent));
  z-index: 9999;
  width: 0%;
  transition: width 0.1s linear;
}

/* === 文章 TOC 激活状态 === */
.sidebar-box .toc-list a {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: all var(--transition-fast);
  border-bottom: 1px solid var(--border-color);
}

.sidebar-box .toc-list a:last-child {
  border-bottom: none;
}

.sidebar-box .toc-list a:hover,
.sidebar-box .toc-list a.active {
  color: var(--primary);
  border-left-color: var(--primary);
  background: var(--primary-bg);
  padding-left: 14px;
}

/* === 文章有帮助反馈组件 === */
.article-feedback {
  margin-top: 40px;
  padding: 24px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  text-align: center;
}

.article-feedback p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.feedback-btns {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.feedback-btn {
  padding: 8px 20px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 14px;
  cursor: pointer;
  background: var(--bg-white);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.feedback-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-bg);
}

.feedback-btn.liked {
  border-color: var(--success);
  color: var(--success);
  background: rgba(16, 185, 129, 0.06);
}

/* === 价格对比表增强 === */
/* position:sticky 在 overflow-x:auto 容器内无效，已移除 */
.compare-table thead {
  position: static;
}

.compare-table tbody tr:nth-child(even) {
  background: var(--bg-light);
}

.compare-table .check-yes {
  color: var(--success);
  font-size: 16px;
}

.compare-table .check-no {
  color: var(--border-color);
  font-size: 16px;
}

/* === 新增断点：1280px === */
@media (max-width: 1280px) {
  .container {
    max-width: 1080px;
  }
}

/* === 新增断点：1440px === */
@media (min-width: 1440px) {
  .container {
    max-width: 1320px;
  }
}

/* === 文章核心要点摘要卡（SGO优化） === */
.key-points {
  background: #f0f7ff;
  border-left: 4px solid var(--primary);
  border-radius: 0 8px 8px 0;
  padding: 14px 20px;
  margin: 0 0 28px;
}
.key-points .kp-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.key-points ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 28px;
}
.key-points ul li {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.key-points ul li::before {
  content: '✓ ';
  color: var(--primary);
  font-weight: 700;
}