/* ===== 基础变量 ===== */
:root {
  --primary: #1890FF;
  --primary-dark: #096DD9;
  --primary-light: #40A9FF;
  --primary-bg: #E6F7FF;
  --accent: #FA541C;
  --text: #333333;
  --text-secondary: #666666;
  --text-light: #999999;
  --bg: #FFFFFF;
  --bg-gray: #F5F7FA;
  --bg-dark: #001529;
  --border: #E8E8E8;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 16px rgba(24, 144, 255, 0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --max-width: 1200px;
  --nav-height: 64px;
}

/* ===== 全局基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
.section-container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
  color: var(--text);
}
.section-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 40px;
}
.highlight { color: var(--primary); font-weight: 600; }

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background 0.3s;
}
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}
.brand-icon { display: block; height: 28px; width: auto; border-radius: 6px; }
.feature-icon, .method-icon { display: none; }
.nav-links { display: flex; gap: 24px; }
.nav-links a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--primary); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 28px;
  height: 20px;
  position: relative;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  position: absolute;
  left: 0;
  transition: all 0.3s;
}
.nav-toggle span:nth-child(1) { top: 0; }
.nav-toggle span:nth-child(2) { top: 8px; }
.nav-toggle span:nth-child(3) { top: 16px; }
.nav-toggle.active span:nth-child(1) { top: 8px; transform: rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { top: 8px; transform: rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-bg) 0%, #BAE7FF 50%, var(--primary-light) 100%);
  opacity: 0.6;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(24, 144, 255, 0.1) 0%, transparent 60%);
}
.hero-content {
  position: relative;
  text-align: center;
  padding: 60px 24px;
  max-width: 800px;
}
.hero-title {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text);
}
.hero-title .accent {
  color: var(--primary);
  display: inline-block;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.8;
}
.hero-badges {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.badge {
  background: var(--bg);
  border: 1px solid var(--primary-light);
  color: var(--primary-dark);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
}
.hero-cta { margin-bottom: 16px; }
/* Hero 二维码内联 */
.qrcode-inline {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.qrcode-inline img {
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 8px;
}
.qrcode-inline p {
  font-size: 13px;
  color: var(--text-secondary);
}
.btn-primary {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 14px 40px;
  border-radius: 28px;
  font-size: 16px;
  font-weight: 700;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
  text-align: center;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.hero-tip {
  font-size: 13px;
  color: var(--text-light);
}

/* ===== 数据预览 ===== */
.preview {
  padding: 80px 0;
  background: var(--bg-gray);
}
.preview-content { margin-top: 32px; }
.preview-table-wrap { overflow-x: auto; margin-bottom: 16px; }
.preview-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--bg);
  border-radius: var(--radius);
}
.preview-table th {
  background: var(--primary-bg);
  padding: 12px 16px;
  font-weight: 700;
  text-align: center;
  border-bottom: 2px solid var(--primary-light);
  font-size: 14px;
}
.preview-table th:first-child,
.preview-table th:nth-child(2) { text-align: left; }
.preview-table td {
  padding: 10px 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.preview-table td:first-child { text-align: center; width: 48px; }
.preview-table td:nth-child(2) {
  text-align: left;
  font-weight: 600;
  color: var(--text);
  min-width: 140px;
}
.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
}
.rank-default { background: var(--bg-gray); color: var(--text-secondary); }
.latest-col { background: var(--primary); color: #fff !important; }
.preview-table td.latest-val {
  font-weight: 800;
  position: relative;
}
.preview-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px dashed var(--border);
}
.preview-note {
  font-size: 14px;
  color: var(--text-secondary);
}
.preview-note .highlight { color: var(--primary); font-weight: 700; }
.btn-preview-cta {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 10px 24px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 700;
  transition: all 0.3s;
}
.btn-preview-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.recent-section { margin-top: 32px; }
.recent-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}
.recent-scroll {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}
.recent-card {
  background: var(--bg);
  border: 1px solid var(--primary-light);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  min-width: 140px;
  flex-shrink: 0;
  transition: all 0.3s;
}
.recent-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
}
.recent-card-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.recent-card-date {
  font-size: 12px;
  color: var(--text-light);
}
.recent-tag {
  display: inline-block;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  margin-top: 4px;
}
.recent-tag.pending {
  background: #FFF7E6;
  color: #FAAD14;
}
.recent-tip {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 12px;
}
.preview-loading {
  text-align: center;
  padding: 60px 0;
  color: var(--text-secondary);
  font-size: 14px;
}
.spinner-lg {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

/* ===== 功能区 ===== */
.features {
  padding: 80px 0;
  background: var(--bg-gray);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}
.feature-icon { display: none; }
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.feature-tag {
  display: inline-block;
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 12px;
  margin-top: 12px;
  font-weight: 600;
}

/* ===== 权益对比 ===== */
.comparison {
  padding: 80px 0;
  background: var(--bg);
}
.comparison-table-wrap {
  margin-bottom: 40px;
  overflow-x: auto;
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.comparison-table th {
  background: var(--bg-gray);
  padding: 12px 16px;
  font-weight: 700;
  text-align: center;
  border-bottom: 2px solid var(--primary-light);
}
.comparison-table th:first-child { text-align: left; }
.basic-col { color: var(--text-secondary); }
.pro-col { color: var(--primary); }
.comparison-table td {
  padding: 12px 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.comparison-table td:first-child { text-align: left; font-weight: 500; }
.check { color: var(--primary); font-weight: 700; }
.cross { color: var(--text-light); }
.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pricing-card {
  background: var(--bg-gray);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 2px solid var(--border);
  transition: all 0.3s;
}
.pricing-card.pro {
  border-color: var(--primary-light);
  background: var(--primary-bg);
}
.pricing-card.best {
  border-color: var(--primary);
  position: relative;
}
.pricing-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.pricing-badge {
  position: absolute;
  top: -12px;
  right: 16px;
  background: var(--accent);
  color: #fff;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 700;
}
.pricing-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.pricing-price {
  font-size: 36px;
  font-weight: 800;
  color: var(--text);
}
.pricing-price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-light);
}
.pricing-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ===== 数据指南 ===== */
.guide {
  padding: 80px 0;
  background: var(--bg-gray);
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.guide-card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border);
}
.guide-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 12px;
}
.guide-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.guide-note {
  background: var(--primary-bg);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--primary-dark);
  line-height: 1.6;
}

/* ===== CTA引流区 ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
}
.cta-title {
  font-size: 32px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 8px;
}
.cta-desc {
  text-align: center;
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 40px;
}
.cta-methods {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: 32px;
  margin-bottom: 40px;
}
.cta-method {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  width: 100%;
  max-width: 420px;
}
.method-icon { display: none; }
.cta-method h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.cta-method p {
  font-size: 14px;
  opacity: 0.85;
  line-height: 1.6;
}
.keyword-list {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 12px;
  flex-wrap: wrap;
}
.keyword {
  background: rgba(255, 255, 255, 0.2);
  padding: 6px 16px;
  border-radius: 16px;
  font-size: 14px;
  font-weight: 600;
}
.qrcode-wrap {
  margin-top: 16px;
  text-align: center;
}
.qrcode {
  width: 200px;
  height: 200px;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 8px;
}
.qrcode-tip {
  font-size: 12px;
  opacity: 0.7;
  margin-top: 8px;
}

/* ===== 页脚 ===== */
.footer {
  padding: 40px 0;
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
}
.footer-content {
  text-align: center;
}
.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.footer-desc {
  font-size: 14px;
  margin-bottom: 16px;
}
.footer-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 16px;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}
.footer-links a:hover { color: #fff; }
.footer-copy {
  font-size: 12px;
  opacity: 0.5;
}
.footer-beian {
  font-size: 12px;
  opacity: 0.5;
  margin-top: 4px;
}
.footer-beian a {
  color: rgba(255, 255, 255, 0.7);
}
.footer-beian a:hover {
  color: #fff;
}

/* ===== 加载态 ===== */
.btn-loading { opacity: 0.85; cursor: not-allowed; }
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== CTA白色按钮 ===== */
.btn-cta-white {
  background: #fff;
  color: var(--primary);
  font-size: 18px;
  padding: 16px 48px;
}
.btn-cta-white:hover {
  background: var(--primary-bg);
  color: var(--primary-dark);
}
.btn-cta-white.btn-loading { color: var(--text-light); }
.btn-cta-white .spinner {
  border-color: rgba(0,0,0,0.15);
  border-top-color: var(--primary);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-cards { grid-template-columns: repeat(2, 1fr); }
  .pricing-card.best { grid-column: span 2; }
}

@media (max-width: 768px) {
  :root { --nav-height: 56px; }
  .nav-links { display: none; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
  }
  .nav-toggle { display: block; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 15px; }
  .section-title { font-size: 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .pricing-cards { grid-template-columns: 1fr; }
  .pricing-card.best { grid-column: span 1; }
  .cta-methods { grid-template-columns: 1fr; }
  .comparison-table { font-size: 13px; }
  .preview-table { font-size: 13px; }
  .preview-footer { flex-direction: column; gap: 12px; text-align: center; }
  .hero-badges { gap: 8px; }
  .badge { padding: 4px 12px; font-size: 13px; }
  .features, .comparison, .guide, .cta-section, .preview { padding: 48px 0; }
  .preview-table td:nth-child(2) { min-width: 100px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .hero-content { padding: 40px 16px; }
  .section-container { padding: 0 16px; }
  .feature-card { padding: 24px 16px; }
  .guide-card { padding: 24px 16px; }
  .pricing-card { padding: 24px 16px; }
}