/* ==========================================
   极云科技 - 企业官网全局样式
   ========================================== */

/* CSS 变量 - 设计令牌 */
:root {
  /* 色彩系统 */
  --color-deep-blue: #0C1B2A;
  --color-electric-blue: #2563EB;
  --color-teal: #06B6D4;
  --color-slate: #1E293B;
  --color-ice: #F1F5F9;
  --color-white: #FFFFFF;
  --color-gray-400: #94A3B8;
  --color-gray-500: #64748B;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1E293B;

  /* 排版 */
  --font-family: system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* 间距 */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* 过渡 */
  --transition: 300ms ease-out;
  --transition-fast: 150ms ease-out;

  /* 布局 */
  --max-width: 1200px;
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.75;
  color: var(--color-slate);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-electric-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

/* ==========================================
   导航栏
   ========================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background-color var(--transition), box-shadow var(--transition);
  background-color: transparent;
}

.navbar.scrolled {
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.navbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  text-decoration: none;
  color: var(--color-white);
  transition: color var(--transition);
}

.navbar.scrolled .navbar-logo {
  color: var(--color-deep-blue);
}

.navbar-logo img {
  height: 40px;
  width: auto;
}

.navbar-logo-text {
  font-size: var(--font-size-lg);
  font-weight: 700;
  white-space: nowrap;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.navbar-links a {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-teal);
  transition: width var(--transition);
}

.navbar-links a:hover::after,
.navbar-links a.active::after {
  width: 100%;
}

.navbar.scrolled .navbar-links a {
  color: var(--color-slate);
}

.navbar.scrolled .navbar-links a:hover {
  color: var(--color-electric-blue);
}

.navbar-phone {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-white);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition);
}

.navbar.scrolled .navbar-phone {
  color: var(--color-electric-blue);
}

.navbar-phone:hover {
  color: var(--color-teal);
}

.navbar-phone svg {
  width: 18px;
  height: 18px;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
  color: var(--color-white);
  transition: color var(--transition);
}

.navbar.scrolled .menu-toggle {
  color: var(--color-deep-blue);
}

.menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--color-white);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-6);
  z-index: 999;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: var(--spacing-3) 0;
  color: var(--color-slate);
  font-size: var(--font-size-base);
  font-weight: 500;
  border-bottom: 1px solid var(--color-ice);
}

.mobile-menu a:hover {
  color: var(--color-electric-blue);
}

.mobile-menu .mobile-phone {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-top: var(--spacing-4);
  padding: var(--spacing-3) var(--spacing-6);
  background: var(--color-electric-blue);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  border-bottom: none;
}

.mobile-menu .mobile-phone:hover {
  background: var(--color-teal);
  color: var(--color-white);
}

/* ==========================================
   Hero 区域
   ========================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-deep-blue);
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-height) + var(--spacing-8)) var(--spacing-6) var(--spacing-8);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(37, 99, 235, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(6, 182, 212, 0.08), transparent);
  pointer-events: none;
}

/* 网格纹理背景 */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero h1 {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.3;
  margin-bottom: var(--spacing-6);
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-teal), var(--color-electric-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  line-height: 1.75;
  margin-bottom: var(--spacing-10);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ==========================================
   按钮
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: 14px 32px;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
  line-height: 1.5;
}

.btn-primary {
  background: var(--color-electric-blue);
  color: var(--color-white);
}

.btn-primary:hover {
  background: #1D4ED8;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
  color: var(--color-white);
}

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

.btn-outline:hover {
  border-color: var(--color-teal);
  color: var(--color-teal);
  transform: translateY(-2px);
}

.btn-teal {
  background: var(--color-teal);
  color: var(--color-white);
}

.btn-teal:hover {
  background: #0891B2;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(6, 182, 212, 0.35);
  color: var(--color-white);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-electric-blue);
  border: 2px solid var(--color-electric-blue);
}

.btn-outline-dark:hover {
  background: var(--color-electric-blue);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* ==========================================
   页面内页 Hero（非首页）
   ========================================== */
.page-hero {
  background: var(--color-deep-blue);
  padding: calc(var(--nav-height) + var(--spacing-16)) var(--spacing-6) var(--spacing-16);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(37, 99, 235, 0.12), transparent);
  pointer-events: none;
}

.page-hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.page-hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.page-hero h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.page-hero p {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  line-height: 1.75;
}

/* ==========================================
   内容区域
   ========================================== */
.section {
  padding: var(--spacing-20) var(--spacing-6);
}

.section-alt {
  background-color: var(--color-ice);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-16);
}

.section-header h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-4);
}

.section-header p {
  font-size: var(--font-size-lg);
  color: var(--color-gray-500);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.75;
}

/* ==========================================
   卡片
   ========================================== */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-ice);
  transition: all var(--transition);
}

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-5);
}

.card-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-electric-blue);
}

.card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-3);
}

.card p {
  color: var(--color-gray-500);
  line-height: 1.75;
}

/* 卡片网格 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-8);
}

.cards-grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.cards-grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* AI智能体介绍区块 */
.agent-intro {
  max-width: 960px;
  margin: 0 auto;
}

.agent-intro-text {
  text-align: center;
  margin-bottom: var(--spacing-10);
}

.agent-intro-lead {
  font-size: var(--font-size-lg);
  color: var(--color-slate);
  line-height: 1.85;
  margin-bottom: var(--spacing-4);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.agent-intro-sub {
  font-size: var(--font-size-base);
  color: var(--color-gray-500);
  font-weight: 500;
}

.agent-intro .cards-grid-4 {
  margin-top: var(--spacing-6);
}

/* ==========================================
   两栏布局
   ========================================== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-12);
  align-items: center;
}

.two-col-text h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-4);
}

.two-col-text p {
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-4);
  line-height: 1.75;
}

.two-col-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-ice);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================
   特性列表
   ========================================== */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.feature-item {
  display: flex;
  gap: var(--spacing-4);
  align-items: flex-start;
}

.feature-check {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-electric-blue), var(--color-teal));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.feature-check svg {
  width: 14px;
  height: 14px;
  color: var(--color-white);
}

.feature-item-text h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-1);
}

.feature-item-text p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* ==========================================
   场景卡片
   ========================================== */
.scenario-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-8);
  border: 1px solid var(--color-ice);
  transition: all var(--transition);
}

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

.scenario-card .scenario-tag {
  display: inline-block;
  padding: 4px 12px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
  color: var(--color-electric-blue);
  border-radius: 20px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-bottom: var(--spacing-4);
}

.scenario-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-3);
}

.scenario-card p {
  color: var(--color-gray-500);
  line-height: 1.75;
  margin-bottom: var(--spacing-4);
}

.scenario-card .scenario-result {
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--color-ice);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  border-left: 3px solid var(--color-teal);
}

/* ==========================================
   SVG 插图占位
   ========================================== */
.illustration {
  width: 100%;
  height: 100%;
  min-height: 320px;
}

/* ==========================================
   统计数字
   ========================================== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-8);
  text-align: center;
}

.stat-item {
  padding: var(--spacing-6);
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-electric-blue), var(--color-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-2);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  font-weight: 500;
}

/* ==========================================
   对比表格
   ========================================== */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.compare-table th,
.compare-table td {
  padding: var(--spacing-4) var(--spacing-6);
  text-align: left;
  border-bottom: 1px solid var(--color-ice);
}

.compare-table th {
  background: var(--color-deep-blue);
  color: var(--color-white);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.compare-table td {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table .highlight-col {
  background: rgba(6, 182, 212, 0.05);
}

/* ==========================================
   联系信息卡片
   ========================================== */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-6);
}

.contact-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-8);
  text-align: center;
  border: 1px solid var(--color-ice);
  transition: all var(--transition);
}

.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-electric-blue);
}

.contact-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-4);
}

.contact-card-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-electric-blue);
}

.contact-card h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-2);
}

.contact-card p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.contact-card a {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

/* 地图占位 */
.map-placeholder {
  width: 100%;
  height: 360px;
  background: var(--color-ice);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.map-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(100, 116, 139, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 116, 139, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

.map-pin {
  position: relative;
  z-index: 1;
  text-align: center;
}

.map-pin svg {
  width: 48px;
  height: 48px;
  color: var(--color-electric-blue);
  margin-bottom: var(--spacing-2);
}

.map-pin span {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  font-weight: 500;
}

/* ==========================================
   团队/关于页面
   ========================================== */
.timeline {
  position: relative;
  padding-left: var(--spacing-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-electric-blue), var(--color-teal));
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-8);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-8) - 5px);
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-electric-blue);
  border: 3px solid var(--color-white);
}

.timeline-item h4 {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-1);
}

.timeline-item p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.75;
}

/* ==========================================
   博客/资讯占位
   ========================================== */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-8);
}

.blog-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-ice);
  transition: all var(--transition);
}

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

.blog-card-img {
  width: 100%;
  height: 180px;
  background: var(--color-ice);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.blog-card-img::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(100, 116, 139, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 116, 139, 0.06) 1px, transparent 1px);
  background-size: 30px 30px;
}

.blog-card-img span {
  position: relative;
  z-index: 1;
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

.blog-card-body {
  padding: var(--spacing-6);
}

.blog-card-date {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-2);
}

.blog-card-body h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-deep-blue);
  margin-bottom: var(--spacing-2);
}

.blog-card-body p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* ==========================================
   客户评价
   ========================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-8);
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-8);
  border: 1px solid var(--color-ice);
}

.testimonial-card .quote {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: 1.75;
  margin-bottom: var(--spacing-6);
  font-style: italic;
}

.testimonial-card .author {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-deep-blue);
}

.testimonial-card .author-role {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

/* ==========================================
   CTA 区域
   ========================================== */
.cta-section {
  background: var(--color-deep-blue);
  padding: var(--spacing-20) var(--spacing-6);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(37, 99, 235, 0.12), transparent);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.cta-content p {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-8);
  line-height: 1.75;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
  background: var(--color-deep-blue);
  color: var(--color-gray-400);
  padding: var(--spacing-16) var(--spacing-6) var(--spacing-8);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-12);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.75;
  margin-top: var(--spacing-4);
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  color: var(--color-white);
  font-weight: 700;
  font-size: var(--font-size-lg);
  text-decoration: none;
}

.footer-logo img {
  height: 36px;
  width: auto;
}

.footer h4 {
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links a {
  display: block;
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  padding: var(--spacing-1) 0;
  transition: color var(--transition-fast);
}

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

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-3);
  font-size: var(--font-size-sm);
}

.footer-contact-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-teal);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--spacing-8);
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

/* ==========================================
   回到顶部按钮
   ========================================== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-electric-blue);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-teal);
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ==========================================
   浮动联系按钮
   ========================================== */
.floating-contact {
  position: fixed;
  bottom: 32px;
  left: 32px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  z-index: 900;
}

.floating-contact a {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  transition: all var(--transition);
  box-shadow: var(--shadow-md);
}

.floating-contact a:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.floating-contact .phone-btn {
  background: var(--color-electric-blue);
}

.floating-contact .phone-btn:hover {
  background: #1D4ED8;
}

.floating-contact .email-btn {
  background: var(--color-teal);
}

.floating-contact .email-btn:hover {
  background: #0891B2;
}

.floating-contact svg {
  width: 20px;
  height: 20px;
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --nav-height: 64px;
  }

  .navbar-links {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .navbar-phone {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + var(--spacing-12)) var(--spacing-4) var(--spacing-12);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .two-col {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .section {
    padding: var(--spacing-12) var(--spacing-4);
  }

  .page-hero {
    padding: calc(var(--nav-height) + var(--spacing-10)) var(--spacing-4) var(--spacing-10);
  }

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

  .compare-table {
    font-size: var(--font-size-xs);
  }

  .compare-table th,
  .compare-table td {
    padding: var(--spacing-2) var(--spacing-3);
  }

  .floating-contact {
    bottom: 20px;
    left: 20px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
  }

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

@media (max-width: 480px) {
  .stats-row {
    grid-template-columns: 1fr;
  }

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

/* ==========================================
   微动画
   ========================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }