:root {
  color-scheme: light;
  --primary: #2b7cff;
  --primary-dark: #1b5dd6;
  --secondary: #f5f8ff;
  --text: #0d1b2a;
  --muted: #5b6b82;
  --border: #e3e8f1;
  --bg: #ffffff;
  --shadow: 0 20px 45px rgba(15, 33, 69, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

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

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  width: 46px;
  height: 46px;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
}

.brand-subtitle {
  font-size: 13px;
  color: var(--muted);
}

.nav {
  display: flex;
  gap: 18px;
  font-weight: 500;
  color: var(--muted);
}

.nav a {
  padding: 6px 10px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.nav a:hover {
  color: var(--primary);
  background: var(--secondary);
}

.lang-switcher {
  display: flex;
  gap: 8px;
}

.lang-btn {
  border: 1px solid var(--border);
  background: #fff;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  color: var(--muted);
  transition: all 0.2s ease;
}

.lang-btn.active,
.lang-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: #eef4ff;
}

.hero {
  padding: 80px 0 100px;
  background: radial-gradient(circle at top left, #f0f6ff, #ffffff 55%);
}

.hero-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2rem, 3vw, 3rem);
  margin-bottom: 18px;
}

.hero-text p {
  color: var(--muted);
  font-size: 17px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  transition: all 0.2s ease;
}

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

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

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

.secondary-btn:hover {
  border-color: var(--primary);
  background: #f2f7ff;
}

.hero-card {
  background: #fff;
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.hero-card-header {
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-card-footer {
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 80px 0;
}

.section.alt {
  background: #f7f9fc;
}

.section-header {
  text-align: center;
  margin-bottom: 42px;
}

.section-header h2 {
  font-size: 28px;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
}

.info-card {
  padding: 28px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.info-card h3 {
  margin-bottom: 18px;
}

.info-list {
  list-style: none;
  display: grid;
  gap: 14px;
  font-size: 15px;
}

.info-list span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.slogan {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 24px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 13px;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
}

.card-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pill-list span {
  padding: 8px 16px;
  border-radius: 999px;
  background: #eef3ff;
  color: var(--primary);
  font-weight: 600;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.contact-card {
  background: #fff;
  border-radius: 18px;
  padding: 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.contact-card ul {
  list-style: none;
  display: grid;
  gap: 16px;
  margin-top: 14px;
}

.contact-card strong {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 4px;
}

.site-footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  background: #fff;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 920px) {
  .nav {
    display: none;
  }

  .header-content {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .footer-content {
    flex-direction: column;
  }
}

.policy-hero {
  padding: 60px 0 40px;
  background: linear-gradient(135deg, #f0f6ff, #ffffff);
  border-bottom: 1px solid var(--border);
}

.policy-hero h1 {
  font-size: 32px;
  margin-bottom: 8px;
}

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

.policy-content {
  padding: 60px 0;
}

.toc {
  background: #f7f9fc;
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 40px;
  border: 1px solid var(--border);
}

.toc h2 {
  font-size: 16px;
  margin-bottom: 14px;
}

.toc ul {
  list-style: none;
}

.toc li {
  margin-bottom: 8px;
}

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

.toc a:hover {
  text-decoration: underline;
}

.policy-section {
  margin-bottom: 38px;
}

.policy-section h2 {
  font-size: 22px;
  margin-bottom: 16px;
  margin-top: 24px;
}

.policy-section h3 {
  font-size: 16px;
  margin-bottom: 12px;
  margin-top: 16px;
}

.policy-section ul {
  list-style-type: disc;
  margin-left: 18px;
  color: var(--muted);
}

.policy-section ul li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.policy-section p {
  color: var(--muted);
  line-height: 1.7;
}

.contact-hero {
  padding: 60px 0 40px;
  background: linear-gradient(135deg, #f0f6ff, #ffffff);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.contact-hero h1 {
  font-size: 32px;
  margin-bottom: 12px;
}

.contact-hero p {
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
}

.contact-grid-extended {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.contact-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px;
  text-align: center;
  box-shadow: var(--shadow);
}

.contact-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.contact-box h3 {
  margin-bottom: 10px;
}

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

.contact-info {
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

.contact-link {
  color: var(--primary);
  font-weight: 600;
  transition: color 0.2s;
}

.contact-link:hover {
  color: var(--primary-dark);
}

.contact-form {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px;
  max-width: 600px;
  margin: 0 auto;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 14px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43, 124, 255, 0.1);
}

.form-message {
  padding: 16px;
  border-radius: 8px;
  margin-top: 16px;
  text-align: center;
  font-weight: 500;
}

.form-message.success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.form-message.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.faq-item h3 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--primary);
}

.faq-item p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.footer-content a {
  color: var(--muted);
  transition: color 0.2s;
}

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