/* GEO 服务商官网 - 全局样式表 */

/* ============ 基础变量 ============ */
:root {
  /* 主色调 */
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-primary-light: #EBF2FF;
  
  /* 推荐标签色 */
  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  
  /* 企业标签色 */
  --color-purple: #7C3AED;
  --color-purple-light: #EDE9FE;
  
  /* 中性色 */
  --color-text-primary: #1F2937;
  --color-text-secondary: #6B7280;
  --color-text-muted: #9CA3AF;
  
  /* 背景色 */
  --color-bg: #FFFFFF;
  --color-bg-secondary: #F9FAFB;
  --color-bg-tertiary: #F3F4F6;
  
  /* 边框色 */
  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;
  
  /* 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 -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  
  /* 字体 */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 96px;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;
  
  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* 容器宽度 */
  --container-max: 1200px;
  --container-narrow: 800px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  min-height: 100vh;
}

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

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ============ 排版 ============ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text-primary);
}

h1 {
  font-size: 48px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 36px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 24px;
}

h4 {
  font-size: 20px;
}

h5 {
  font-size: 18px;
}

h6 {
  font-size: 16px;
}

p {
  color: var(--color-text-secondary);
}

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

.text-primary {
  color: var(--color-text-primary);
}

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

/* ============ 布局 ============ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--spacing-4xl) 0;
}

.section-sm {
  padding: var(--spacing-3xl) 0;
}

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

/* ============ 网格 ============ */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ============ 导航栏 ============ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

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

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.navbar-brand svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

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

.navbar-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--color-text-primary);
}

.navbar-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

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

/* 移动端菜单按钮 */
.navbar-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.navbar-toggle:hover {
  background: var(--color-bg-secondary);
}

.navbar-toggle svg {
  width: 24px;
  height: 24px;
  color: var(--color-text-primary);
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
}

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

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

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-text-muted);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-light);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-full {
  width: 100%;
}

/* ============ 卡片 ============ */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-border-light);
}

.card-header {
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
}

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

/* ============ 页面标题区 ============ */
.page-header {
  padding-top: calc(64px + var(--spacing-4xl));
  padding-bottom: var(--spacing-3xl);
  text-align: center;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  margin-bottom: var(--spacing-md);
}

.page-header p {
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto;
}

/* ============ Hero 区域 ============ */
.hero {
  padding-top: calc(64px + var(--spacing-4xl));
  padding-bottom: var(--spacing-4xl);
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
  font-size: 20px;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}

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

/* ============ 特色标签 ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge-purple {
  background: var(--color-purple-light);
  color: var(--color-purple);
}

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

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

.list-check {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-primary);
  margin-top: 2px;
}

.list-check.success {
  color: var(--color-success);
}

/* ============ 价格卡片 ============ */
.pricing-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-card:hover {
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border-color: var(--color-success);
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.pricing-card.enterprise {
  border-color: var(--color-purple);
}

.pricing-header {
  text-align: center;
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
}

.pricing-badge {
  margin-bottom: var(--spacing-md);
}

.pricing-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--spacing-xs);
}

.pricing-price .currency {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.pricing-price .amount {
  font-size: 48px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
}

.pricing-price .period {
  font-size: 14px;
  color: var(--color-text-muted);
}

.pricing-features {
  margin-bottom: var(--spacing-xl);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.pricing-features li svg {
  width: 16px;
  height: 16px;
  color: var(--color-success);
  flex-shrink: 0;
}

/* ============ 流程步骤 ============ */
.process-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.process-step {
  flex: 1;
  text-align: center;
  position: relative;
  padding: 0 var(--spacing-md);
}

.process-step::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 50%;
  width: 100%;
  height: 2px;
  background: var(--color-border);
}

.process-step:last-child::before {
  display: none;
}

.process-step-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  margin: 0 auto var(--spacing-md);
  position: relative;
  z-index: 1;
}

.process-step-number span {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
}

.process-step-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.process-step-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ============ 联系表单 ============ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--color-text-primary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

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

/* ============ 页脚 ============ */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .navbar-brand {
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-contact p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
  margin-right: var(--spacing-sm);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.footer-copyright {
  font-size: 14px;
  color: var(--color-text-muted);
}

.footer-qr {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 14px;
  color: var(--color-text-secondary);
}

.footer-qr img {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-primary);
  text-align: left;
  cursor: pointer;
}

.faq-question svg {
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}

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

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

.faq-answer p {
  padding-bottom: var(--spacing-lg);
  font-size: 15px;
  line-height: 1.7;
}

/* ============ 工具类 ============ */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.hidden { display: none !important; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  h1 { font-size: 40px; }
  h2 { font-size: 32px; }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .process-steps {
    flex-wrap: wrap;
    gap: var(--spacing-xl);
  }
  
  .process-step {
    flex: 0 0 calc(33.333% - var(--spacing-lg));
  }
  
  .process-step::before {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-4xl: 64px;
    --spacing-3xl: 48px;
  }
  
  h1 { font-size: 32px; }
  h2 { font-size: 28px; }
  h3 { font-size: 20px; }
  
  .navbar-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }
  
  .navbar-menu.active {
    display: flex;
  }
  
  .navbar-toggle {
    display: flex;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .hero {
    padding-top: calc(64px + var(--spacing-2xl));
    padding-bottom: var(--spacing-2xl);
  }
  
  .hero-subtitle {
    font-size: 18px;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .process-step {
    flex: 0 0 100%;
  }
  
  .page-header {
    padding-top: calc(64px + var(--spacing-2xl));
    padding-bottom: var(--spacing-xl);
  }
  
  .page-header p {
    font-size: 16px;
  }
}

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

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* ============ 二维码模态框 ============ */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  max-width: 400px;
  width: 90%;
  text-align: center;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-bg-secondary);
}

.modal-close svg {
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
}

.modal img {
  width: 250px;
  height: 250px;
  margin: var(--spacing-lg) auto;
  border-radius: var(--radius-lg);
}

.modal h3 {
  margin-bottom: var(--spacing-sm);
}

.modal p {
  font-size: 14px;
}