/* GEO 获客官网 - 全局样式表 */

/* ========== CSS 变量 ========== */
:root {
  /* 颜色规范 */
  --color-primary: #FFFFFF;
  --color-secondary: #F8F9FA;
  --color-accent: #059669;
  --color-accent-hover: #047857;
  --color-text-primary: #111827;
  --color-text-secondary: #6B7280;
  --color-border: #E5E7EB;
  --color-success: #059669;
  --color-warning: #DC2626;

  /* 间距规范 */
  --spacing-page: 64px;
  --spacing-page-mobile: 24px;
  --spacing-section: 80px;
  --spacing-card: 24px;
  --spacing-element: 16px;
  --spacing-element-lg: 24px;
  --spacing-element-xl: 32px;

  /* 字体规范 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-h1: 44px;
  --font-size-h1-mobile: 36px;
  --font-size-h2: 34px;
  --font-size-h2-mobile: 28px;
  --font-size-h3: 26px;
  --font-size-h3-mobile: 22px;
  --font-size-body: 16px;
  --font-size-small: 14px;
  --font-size-hero-number: 48px;

  /* 组件规范 */
  --nav-height: 64px;
  --button-height: 48px;
  --border-radius: 8px;
  --border-radius-button: 6px;
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 4px 16px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}

ul, ol {
  list-style: none;
}

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

/* ========== 排版 ========== */
h1 {
  font-size: var(--font-size-h1);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text-primary);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text-primary);
}

h4 {
  font-size: var(--font-size-body);
  font-weight: 600;
  line-height: 1.4;
}

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

/* ========== 容器 ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-page);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-page-mobile);
  }
}

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

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

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

.navbar-logo span {
  color: var(--color-accent);
}

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

.navbar-nav a {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

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

.navbar-cta {
  display: flex;
  align-items: center;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-text-primary);
}

@media (max-width: 900px) {
  .navbar-nav {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    flex-direction: column;
    padding: var(--spacing-element) var(--spacing-page-mobile);
    border-bottom: 1px solid var(--color-border);
    gap: var(--spacing-element);
  }

  .navbar-nav.active {
    display: flex;
  }

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

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--button-height);
  padding: 0 var(--spacing-element-lg);
  font-size: var(--font-size-body);
  font-weight: 600;
  border-radius: var(--border-radius-button);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

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

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

.btn-outline:hover {
  border-color: var(--color-text-primary);
}

.btn-large {
  height: 56px;
  padding: 0 32px;
  font-size: 18px;
}

/* ========== 卡片 ========== */
.card {
  background-color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-card);
  transition: all 0.2s ease;
}

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

.card-accent {
  border-color: var(--color-accent);
}

/* ========== 数据卡片 ========== */
.data-card {
  text-align: center;
  padding: var(--spacing-element-xl);
}

.data-card .number {
  font-size: var(--font-size-hero-number);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--spacing-element);
}

.data-card .label {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

/* ========== 区域 ========== */
.section {
  padding: var(--spacing-section) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-element-xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-element);
}

.section-header p {
  font-size: var(--font-size-body);
}

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

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

@media (max-width: 992px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ========== Hero 区域 ========== */
.hero {
  padding-top: calc(var(--nav-height) + var(--spacing-section));
  padding-bottom: var(--spacing-section);
  text-align: center;
}

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

.hero .subtitle {
  font-size: 20px;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-element-xl);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-element-xl);
  margin-bottom: var(--spacing-element-xl);
  flex-wrap: wrap;
}

.hero-stats .stat {
  text-align: center;
}

.hero-stats .stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
}

.hero-stats .stat-label {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

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

/* ========== 表格 ========== */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: var(--spacing-element);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background-color: var(--color-secondary);
  font-weight: 600;
  color: var(--color-text-primary);
}

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

.table-highlight {
  background-color: rgba(5, 150, 105, 0.08);
}

.table-highlight td {
  color: var(--color-accent);
  font-weight: 600;
}

/* ========== 流程图 ========== */
.flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-element);
  flex-wrap: wrap;
}

.flow-item {
  background-color: var(--color-secondary);
  padding: var(--spacing-element) var(--spacing-element-lg);
  border-radius: var(--border-radius);
  font-weight: 500;
  white-space: nowrap;
}

.flow-arrow {
  color: var(--color-accent);
  font-size: 24px;
}

/* ========== 时间线 ========== */
.timeline {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
  padding: var(--spacing-element-xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: calc(var(--spacing-element-xl) + 12px);
  left: 10%;
  right: 10%;
  height: 4px;
  background-color: var(--color-border);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  text-align: center;
  flex: 1;
  max-width: 200px;
}

.timeline-dot {
  width: 24px;
  height: 24px;
  background-color: var(--color-accent);
  border-radius: 50%;
  margin: 0 auto var(--spacing-element);
  position: relative;
  z-index: 1;
}

.timeline-content {
  font-size: var(--font-size-small);
}

.timeline-date {
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

@media (max-width: 768px) {
  .timeline {
    flex-direction: column;
    gap: var(--spacing-element-lg);
  }

  .timeline::before {
    top: 0;
    bottom: 0;
    left: 12px;
    right: auto;
    width: 4px;
    height: auto;
  }

  .timeline-item {
    display: flex;
    align-items: flex-start;
    text-align: left;
    max-width: none;
    gap: var(--spacing-element);
  }

  .timeline-dot {
    margin: 0;
    flex-shrink: 0;
  }
}

/* ========== 清单 ========== */
.checklist {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-element);
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-element);
  padding: var(--spacing-element);
  background-color: var(--color-secondary);
  border-radius: var(--border-radius);
}

.checklist-item.checked {
  background-color: rgba(5, 150, 105, 0.08);
}

.checklist-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.checklist-icon.checked {
  background-color: var(--color-accent);
}

.checklist-icon svg {
  width: 14px;
  height: 14px;
  stroke: var(--color-primary);
}

.checklist-icon.unchecked {
  border: 2px solid var(--color-border);
}

/* ========== FAQ ========== */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-element-lg) 0;
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-question {
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-element);
}

.faq-answer {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ========== CTA 横幅 ========== */
.cta-banner {
  background-color: var(--color-accent);
  color: var(--color-primary);
  text-align: center;
  padding: var(--spacing-section) 0;
}

.cta-banner h2 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-element-lg);
}

.cta-banner .btn {
  background-color: var(--color-primary);
  color: var(--color-accent);
}

.cta-banner .btn:hover {
  background-color: var(--color-secondary);
}

/* ========== 联系区 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-element-lg);
  text-align: center;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-item {
  padding: var(--spacing-element-lg);
}

.contact-label {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-element);
}

.contact-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.contact-qr {
  margin-top: var(--spacing-element);
}

.contact-qr img {
  width: 120px;
  height: 120px;
  border-radius: var(--border-radius);
}

/* ========== 价格卡片 ========== */
.price-card {
  text-align: center;
  padding: var(--spacing-element-xl);
  max-width: 400px;
  margin: 0 auto;
}

.price-amount {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.price-amount span {
  font-size: 24px;
  font-weight: 500;
}

.price-period {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-element);
}

.price-features {
  margin: var(--spacing-element-lg) 0;
  text-align: left;
}

.price-features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-element);
  padding: var(--spacing-element) 0;
  color: var(--color-text-secondary);
}

.price-features li svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-accent);
  flex-shrink: 0;
}

/* ========== 页脚 ========== */
.footer {
  background-color: var(--color-secondary);
  padding: var(--spacing-section) 0 var(--spacing-element-xl);
  margin-top: var(--spacing-section);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-element-lg);
}

.footer-contact {
  display: flex;
  gap: var(--spacing-element-xl);
  flex-wrap: wrap;
}

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

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

.footer-copyright {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

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

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

.form-input {
  width: 100%;
  height: var(--button-height);
  padding: 0 var(--spacing-element);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-body);
  font-family: inherit;
  transition: border-color 0.2s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* ========== ROI 计算器 ========== */
.roi-calculator {
  background-color: var(--color-secondary);
  border-radius: var(--border-radius);
  padding: var(--spacing-element-xl);
  max-width: 600px;
  margin: 0 auto;
}

.roi-result {
  margin-top: var(--spacing-element-lg);
  padding-top: var(--spacing-element-lg);
  border-top: 1px solid var(--color-border);
}

.roi-result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-element);
}

@media (max-width: 768px) {
  .roi-result-grid {
    grid-template-columns: 1fr;
  }
}

.roi-result-item {
  padding: var(--spacing-element);
  background-color: var(--color-primary);
  border-radius: var(--border-radius);
}

.roi-result-item .label {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.roi-result-item .value {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-accent);
}

/* ========== 图表容器 ========== */
.chart-container {
  position: relative;
  height: 300px;
  margin: var(--spacing-element-lg) 0;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  h1 {
    font-size: var(--font-size-h1-mobile);
  }

  h2 {
    font-size: var(--font-size-h2-mobile);
  }

  h3 {
    font-size: var(--font-size-h3-mobile);
  }

  .section {
    padding: 60px 0;
  }

  .hero-stats {
    gap: var(--spacing-element-lg);
  }
}

/* ========== 动画 ========== */
@media (prefers-reduced-motion: no-preference) {
  .fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

  .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
  }
}