/* ========================================
   重庆领天卓科技有限公司 - 企业官网样式
   设计风格：简约大气 / 科技感
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
  /* 主色调 - 深海蓝科技感 */
  --color-primary: #0A2540;
  --color-primary-light: #1B4965;
  --color-accent: #00B4D8;
  --color-accent-light: #48CAE4;
  --color-accent-glow: rgba(0, 180, 216, 0.15);

  /* 中性色 */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F7F9FC;
  --color-bg-dark: #0A2540;
  --color-text: #1A1A2E;
  --color-text-secondary: #5A6B7D;
  --color-text-light: #8A9BAE;
  --color-border: #E2E8F0;
  --color-white: #FFFFFF;

  /* 字体 */
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;

  /* 间距 */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 37, 64, 0.1);
  --shadow-lg: 0 16px 48px rgba(10, 37, 64, 0.14);
  --shadow-accent: 0 8px 32px rgba(0, 180, 216, 0.25);

  /* 过渡 */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* 布局 */
  --container-max: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
}

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

ul {
  list-style: none;
}

/* ===== 容器 ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 区段 ===== */
.section {
  padding: var(--space-2xl) 0;
}

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

.section--dark {
  background: var(--color-primary);
  color: var(--color-white);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-xl);
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: var(--space-sm);
}

.section--dark .section-header h2 {
  color: var(--color-white);
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.section--dark .section-header p {
  color: rgba(255, 255, 255, 0.75);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: inherit;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-accent);
}

.btn--primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 180, 216, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn--outline:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

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

.btn--dark:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn--ghost:hover {
  background: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn--lg {
  padding: 16px 40px;
  font-size: 1rem;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
}

.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary-light));
  border-radius: var(--radius-sm);
  color: var(--color-white);
}

.nav-logo .logo-icon svg {
  width: 22px;
  height: 22px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition);
}

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

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-cta .btn {
  padding: 10px 24px;
  font-size: 0.875rem;
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-primary);
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 180, 216, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 30%, rgba(27, 73, 101, 0.4) 0%, transparent 50%),
    linear-gradient(180deg, #0A2540 0%, #0D2E4F 100%);
}

.hero-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(0, 180, 216, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 180, 216, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}

.hero-particles .particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 50%;
  opacity: 0.3;
  animation: float 8s ease-in-out infinite;
}

.hero-particles .particle:nth-child(1) { top: 15%; left: 10%; animation-delay: 0s; }
.hero-particles .particle:nth-child(2) { top: 30%; left: 85%; animation-delay: 1s; width: 6px; height: 6px; }
.hero-particles .particle:nth-child(3) { top: 60%; left: 15%; animation-delay: 2s; width: 3px; height: 3px; }
.hero-particles .particle:nth-child(4) { top: 75%; left: 70%; animation-delay: 3s; width: 5px; height: 5px; }
.hero-particles .particle:nth-child(5) { top: 20%; left: 50%; animation-delay: 1.5s; }
.hero-particles .particle:nth-child(6) { top: 50%; left: 90%; animation-delay: 2.5s; width: 3px; height: 3px; }
.hero-particles .particle:nth-child(7) { top: 85%; left: 30%; animation-delay: 0.5s; width: 6px; height: 6px; }
.hero-particles .particle:nth-child(8) { top: 40%; left: 60%; animation-delay: 3.5s; }

@keyframes float {
  0%, 100% { transform: translateY(0px); opacity: 0.3; }
  50% { transform: translateY(-30px); opacity: 0.6; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(0, 180, 216, 0.15);
  border: 1px solid rgba(0, 180, 216, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--color-accent-light);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .hero-desc {
  font-size: 1.1875rem;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat .stat-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
}

.hero-stat .stat-num .unit {
  font-size: 1.25rem;
  color: var(--color-accent-light);
}

.hero-stat .stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 6px;
}

/* ===== 页面横幅（内页） ===== */
.page-banner {
  position: relative;
  padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-xl);
  background: var(--color-primary);
  overflow: hidden;
  text-align: center;
}

.page-banner .hero-bg {
  opacity: 0.7;
}

.page-banner h1 {
  position: relative;
  z-index: 2;
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.page-banner p {
  position: relative;
  z-index: 2;
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 特性卡片网格 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

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

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  color: var(--color-accent);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===== 服务卡片（大卡片） ===== */
.service-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  margin-bottom: var(--space-2xl);
}

.service-card:nth-child(even) {
  direction: rtl;
}

.service-card:nth-child(even) > * {
  direction: ltr;
}

.service-card:last-child {
  margin-bottom: 0;
}

.service-visual {
  height: 360px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-visual::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 30% 40%, rgba(0, 180, 216, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(72, 202, 228, 0.15) 0%, transparent 50%);
}

.service-visual .visual-icon {
  position: relative;
  z-index: 2;
  width: 120px;
  height: 120px;
  color: var(--color-accent-light);
}

.service-visual .visual-icon svg {
  width: 100%;
  height: 100%;
}

.service-info .service-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-accent-glow);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.service-info h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.service-info > p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.service-features {
  display: grid;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.service-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.service-features li .check {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  border-radius: 50%;
  color: var(--color-white);
  margin-top: 2px;
}

.service-features li .check svg {
  width: 12px;
  height: 12px;
}

/* ===== 关于我们 - 介绍区 ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.about-text h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.about-text p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.9;
  margin-bottom: var(--space-md);
}

.about-visual {
  position: relative;
  height: 420px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 25% 25%, rgba(0, 180, 216, 0.25) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(72, 202, 228, 0.15) 0%, transparent 50%);
}

.about-visual .grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 180, 216, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 180, 216, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

.about-visual .visual-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
}

.about-visual .visual-content .big-num {
  font-size: 4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.about-visual .visual-content .big-label {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: var(--space-sm);
}

/* ===== 价值观卡片 ===== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}

.value-card {
  text-align: center;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.value-card .value-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent-glow), rgba(72, 202, 228, 0.1));
  border-radius: 50%;
  color: var(--color-accent);
}

.value-card .value-icon svg {
  width: 32px;
  height: 32px;
}

.value-card h4 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.value-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===== 发展历程 ===== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent), var(--color-border));
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 var(--space-lg) var(--space-lg) 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
  padding: 0 0 var(--space-lg) var(--space-lg);
}

.timeline-item .timeline-dot {
  position: absolute;
  top: 6px;
  right: -8px;
  width: 16px;
  height: 16px;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--color-accent-glow);
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -8px;
  right: auto;
}

.timeline-content {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: var(--transition);
}

.timeline-content:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.timeline-content .year {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.timeline-content h4 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 4px 0 8px;
}

.timeline-content p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===== 服务流程 ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.process-step {
  text-align: center;
  position: relative;
  padding: var(--space-lg) var(--space-sm);
}

.process-step .step-num {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  position: relative;
  z-index: 2;
}

.process-step .step-num::before {
  content: '';
  position: absolute;
  inset: -6px;
  border: 2px dashed var(--color-accent-glow);
  border-radius: 50%;
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.process-step h4 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.process-step p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===== CTA 区域 ===== */
.cta-section {
  position: relative;
  padding: var(--space-2xl) 0;
  background: var(--color-primary);
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(0, 180, 216, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 50%, rgba(27, 73, 101, 0.3) 0%, transparent 50%);
}

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

.cta-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.cta-section p {
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--space-lg);
}

.cta-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 联系页面 ===== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
}

.contact-info {
  display: grid;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.contact-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-accent);
}

.contact-item .contact-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-glow);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

.contact-item .contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-item .contact-text h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.contact-item .contact-text p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.contact-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.contact-form h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-bg);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-success {
  display: none;
  padding: var(--space-md);
  background: rgba(0, 180, 216, 0.1);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}

.form-success.show {
  display: block;
}

/* 地图区域 */
.map-section {
  height: 400px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.map-placeholder {
  text-align: center;
  color: var(--color-text-light);
}

.map-placeholder svg {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-sm);
  opacity: 0.4;
}

.map-placeholder p {
  font-size: 0.9375rem;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-xl) 0 var(--space-lg);
}

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

.footer-brand .nav-logo {
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.footer-col ul {
  display: grid;
  gap: 10px;
}

.footer-col ul a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
}

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

.footer-contact li {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.8;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

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

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.4);
  transition: var(--transition);
}

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

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }

/* ===== 响应式 ===== */
@media (max-width: 968px) {
  .service-card,
  .about-intro,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .service-card:nth-child(even) {
    direction: ltr;
  }

  .service-visual {
    height: 280px;
  }

  .about-visual {
    height: 320px;
  }

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

@media (max-width: 768px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  /* 移动端菜单 */
  .nav-mobile {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    box-shadow: var(--shadow-lg);
  }

  .nav-mobile.active {
    display: block;
  }

  .nav-mobile a {
    display: block;
    padding: 14px 16px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: var(--transition);
  }

  .nav-mobile a:hover,
  .nav-mobile a.active {
    background: var(--color-accent-glow);
    color: var(--color-accent);
  }

  .nav-mobile .btn {
    width: 100%;
    margin-top: var(--space-sm);
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero .hero-desc {
    font-size: 1rem;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .hero-stat .stat-num {
    font-size: 2rem;
  }

  .section-header h2,
  .cta-section h2,
  .page-banner h1 {
    font-size: 1.75rem;
  }

  .section {
    padding: var(--space-xl) 0;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 50px;
    padding-right: 0;
  }

  .timeline-item:nth-child(even) {
    left: 0;
    padding-left: 50px;
    padding-right: 0;
  }

  .timeline-item .timeline-dot {
    left: 12px;
    right: auto;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.875rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .container {
    padding: 0 16px;
  }
}