/* ============================================
   GEO 运营官网 - 主样式表
   风格：白色系 / 运营蓝 #2563EB / 专业可靠
   参考：Stripe 设计系统 + GEO 品牌定制
   ============================================ */

/* --- CSS 变量 --- */
:root {
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-primary-light: #DBEAFE;
  --color-primary-50: #EFF6FF;
  --color-green: #10B981;
  --color-green-bg: rgba(16, 185, 129, 0.1);
  --color-green-border: rgba(16, 185, 129, 0.3);
  --color-purple: #7C3AED;
  --color-purple-bg: rgba(124, 58, 237, 0.08);
  --color-purple-border: rgba(124, 58, 237, 0.2);

  --color-bg: #FFFFFF;
  --color-bg-alt: #F9FAFB;
  --color-bg-dark: #0F172A;
  --color-heading: #0F172A;
  --color-body: #475569;
  --color-label: #1E293B;
  --color-muted: #94A3B8;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -5px rgba(37, 99, 235, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 40px -10px rgba(37, 99, 235, 0.12), 0 8px 16px -6px rgba(0, 0, 0, 0.04);

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --max-width: 1120px;
  --nav-height: 64px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-body);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

ul, ol {
  list-style: none;
}

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

.section {
  padding: 80px 0;
}

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

.section-dark {
  background: var(--color-bg-dark);
  color: #FFFFFF;
}

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

.section-header {
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: 32px;
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.section-dark .section-title {
  color: #FFFFFF;
}

.section-desc {
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-body);
}

.section-dark .section-desc {
  color: rgba(255, 255, 255, 0.7);
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

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

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

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

.btn-outline:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-white {
  background: #FFFFFF;
  color: var(--color-primary);
  border-color: #FFFFFF;
}

.btn-white:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-hover);
}

.btn-lg {
  padding: 12px 28px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* --- 导航栏 --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 1000;
  transition: box-shadow 0.3s;
}

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

.navbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-heading);
  text-decoration: none;
}

.navbar-brand svg {
  width: 28px;
  height: 28px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar-nav a {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-body);
  text-decoration: none;
  transition: color 0.2s;
}

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

.navbar-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-heading);
}

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

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px;
  z-index: 999;
}

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

.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  color: var(--color-body);
  border-bottom: 1px solid var(--color-border-light);
  text-decoration: none;
}

.mobile-menu a:last-child {
  border-bottom: none;
}

.mobile-menu .btn {
  width: 100%;
  margin-top: 12px;
}

/* --- Hero 区域 --- */
.hero {
  padding-top: calc(var(--nav-height) + 64px);
  padding-bottom: 80px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-light);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

.hero-title {
  font-size: 48px;
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-heading);
  margin-bottom: 20px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-body);
  max-width: 560px;
  margin: 0 auto 32px;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--color-label);
}

.hero-feature svg {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
}

/* --- 卡片 --- */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: box-shadow 0.2s, border-color 0.2s;
}

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

.card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-50);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.card-icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.card-title {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-heading);
  margin-bottom: 10px;
}

.card-desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-body);
}

/* --- 卡片网格 --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

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

/* --- 对比区域 --- */
.compare-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.compare-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.compare-card.highlight {
  border-color: var(--color-primary);
  background: var(--color-primary-50);
}

.compare-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 20px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.compare-label.bad {
  background: #FEF2F2;
  color: #DC2626;
}

.compare-label.good {
  background: var(--color-green-bg);
  color: #059669;
}

.compare-title {
  font-size: 20px;
  font-weight: 500;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.compare-card.highlight .compare-title {
  color: var(--color-primary);
}

.compare-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  color: var(--color-body);
  padding: 8px 0;
}

.compare-list li svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.compare-card .compare-list li svg {
  color: #DC2626;
}

.compare-card.highlight .compare-list li svg {
  color: var(--color-green);
}

/* --- 流程图 --- */
.flow-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px 24px;
  position: relative;
}

.flow-step-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-50);
  border: 2px solid var(--color-primary-light);
  border-radius: 50%;
}

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

.flow-step-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-heading);
  white-space: nowrap;
}

.flow-arrow {
  display: flex;
  align-items: center;
  color: var(--color-muted);
  padding: 0 4px;
}

.flow-arrow svg {
  width: 20px;
  height: 20px;
}

/* --- 价格卡片 --- */
.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.pricing-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 32px;
  position: relative;
  transition: box-shadow 0.2s;
}

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

.pricing-card.recommended {
  border-color: var(--color-green);
  box-shadow: var(--shadow-xl);
  transform: scale(1.02);
}

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

.pricing-tag {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.pricing-tag.recommend-tag {
  background: var(--color-green);
  color: #FFFFFF;
}

.pricing-tag.premium-tag {
  background: var(--color-purple);
  color: #FFFFFF;
}

.pricing-name {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.pricing-audience {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.pricing-amount {
  font-size: 48px;
  font-weight: 300;
  color: var(--color-heading);
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.pricing-amount span {
  font-size: 18px;
  font-weight: 400;
  color: var(--color-muted);
}

.pricing-period {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.pricing-features {
  margin-bottom: 28px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--color-body);
  padding: 6px 0;
}

.pricing-features li svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 1px;
}

.pricing-card .btn {
  width: 100%;
}

/* --- 对比表格 --- */
.compare-table-wrap {
  overflow-x: auto;
  margin-top: 32px;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.compare-table th,
.compare-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.compare-table th {
  font-weight: 500;
  color: var(--color-heading);
  background: var(--color-bg-alt);
}

.compare-table th:first-child {
  border-radius: var(--radius-sm) 0 0 0;
}

.compare-table th:last-child {
  border-radius: 0 var(--radius-sm) 0 0;
}

.compare-table td {
  color: var(--color-body);
}

.compare-table td:first-child {
  font-weight: 500;
  color: var(--color-label);
}

.compare-table .check {
  color: var(--color-primary);
}

.compare-table .cross {
  color: var(--color-muted);
}

/* --- FAQ --- */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 0;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-heading);
  cursor: pointer;
  text-align: left;
}

.faq-question svg {
  width: 20px;
  height: 20px;
  color: var(--color-muted);
  flex-shrink: 0;
  transition: transform 0.2s;
}

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

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

.faq-answer-inner {
  padding-bottom: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-body);
}

/* --- CTA 横幅 --- */
.cta-banner {
  background: var(--color-primary);
  border-radius: var(--radius-xl);
  padding: 48px;
  text-align: center;
  color: #FFFFFF;
}

.cta-banner h2 {
  font-size: 28px;
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 16px;
  opacity: 0.85;
  margin-bottom: 28px;
}

/* --- 页脚 --- */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-info {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
}

.footer-info a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-info a:hover {
  color: #FFFFFF;
}

.footer-qr {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-qr img {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
}

.footer-qr span {
  font-size: 13px;
}

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: 13px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.4);
}

/* --- 优惠卡片 --- */
.discount-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.discount-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
}

.discount-card h4 {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.discount-card .discount-rate {
  font-size: 32px;
  font-weight: 300;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.discount-card .discount-save {
  font-size: 14px;
  color: var(--color-green);
  font-weight: 500;
  margin-bottom: 4px;
}

.discount-card .discount-desc {
  font-size: 13px;
  color: var(--color-muted);
}

/* --- 保障列表 --- */
.guarantee-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-label);
}

.guarantee-item svg {
  width: 20px;
  height: 20px;
  color: var(--color-green);
  flex-shrink: 0;
}

/* --- 运营流程纵向 --- */
.process-timeline {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
}

.process-timeline::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.process-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  position: relative;
}

.process-item-dot {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-50);
  border: 2px solid var(--color-primary-light);
  border-radius: 50%;
  flex-shrink: 0;
  z-index: 1;
}

.process-item-dot svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.process-item-content h3 {
  font-size: 17px;
  font-weight: 500;
  color: var(--color-heading);
  margin-bottom: 6px;
}

.process-item-content p {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.6;
}

/* --- 报告卡片 --- */
.report-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: box-shadow 0.2s;
}

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

.report-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.report-card-type {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.report-card-date {
  font-size: 13px;
  color: var(--color-muted);
}

.report-card h3 {
  font-size: 17px;
  font-weight: 500;
  color: var(--color-heading);
  margin-bottom: 10px;
}

.report-card p {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.6;
  margin-bottom: 16px;
}

.report-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.report-metric {
  text-align: center;
  padding: 12px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
}

.report-metric-value {
  font-size: 22px;
  font-weight: 300;
  color: var(--color-heading);
  letter-spacing: -0.02em;
}

.report-metric-label {
  font-size: 12px;
  color: var(--color-muted);
  margin-top: 2px;
}

/* --- 联系页面 --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-method {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.contact-method-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-50);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.contact-method-icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.contact-method h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.contact-method p {
  font-size: 14px;
  color: var(--color-body);
}

.contact-qr {
  text-align: center;
  padding: 40px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.contact-qr img {
  width: 180px;
  height: 180px;
  margin: 0 auto 16px;
  border-radius: var(--radius-md);
}

.contact-qr h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.contact-qr p {
  font-size: 14px;
  color: var(--color-muted);
}

/* --- 详情方案 --- */
.plan-detail {
  padding: 40px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.plan-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.plan-detail-header h3 {
  font-size: 22px;
  font-weight: 500;
  color: var(--color-heading);
}

.plan-detail-header .plan-price {
  font-size: 20px;
  font-weight: 500;
  color: var(--color-primary);
}

.plan-detail-body {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.plan-detail-col h4 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.plan-detail-col ul li {
  font-size: 14px;
  color: var(--color-body);
  padding: 6px 0;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.plan-detail-col ul li svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

/* --- 页面顶部 --- */
.page-header {
  padding-top: calc(var(--nav-height) + 48px);
  padding-bottom: 48px;
  text-align: center;
  background: var(--color-bg-alt);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .plan-detail-body {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }

  .section-title {
    font-size: 26px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-features {
    gap: 16px;
  }

  .navbar-nav {
    display: none;
  }

  .navbar-cta .btn {
    display: none;
  }

  .navbar-toggle {
    display: block;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .pricing-cards {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .pricing-card.recommended {
    transform: none;
  }

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

  .flow-steps {
    flex-direction: column;
  }

  .flow-arrow svg {
    transform: rotate(90deg);
  }

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

  .plan-detail-body {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .guarantee-list {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    padding: 32px 20px;
  }

  .cta-banner h2 {
    font-size: 22px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

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

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

  .hero-title {
    font-size: 28px;
  }

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

  .pricing-amount {
    font-size: 40px;
  }
}