* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
}

body {
  background: radial-gradient(ellipse at top left, #e8f0fe, #f3e8ff 50%, #fdf4ff);
  min-height: 100vh;
  color: #1f2937;
  display: flex;
  flex-direction: column;
}

/* 导航 */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  color: #374151;
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  color: #111827;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 32px;
  font-size: 15px;
}

.nav-link {
  text-decoration: none;
  color: #6b7280;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: #111827;
}

/* 主内容 */
.main {
  flex: 1;
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 48px 80px;
}

.hero-title {
  font-size: 44px;
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  color: #111827;
}

.hero-subtitle {
  color: #4b5563;
  font-size: 17px;
  line-height: 1.75;
  margin-bottom: 48px;
}

/* Values / Philosophy */
.values-section {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(0,0,0,0.06);
}

.values-section h2 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9ca3af;
  margin-bottom: 28px;
}

.value-item {
  margin-bottom: 28px;
}

.value-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #111827;
}

.value-item p {
  font-size: 15px;
  color: #6b7280;
  line-height: 1.65;
}

/* 页面标题 */
.page-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  color: #111827;
}

.page-date {
  color: #9ca3af;
  font-size: 14px;
  margin-bottom: 32px;
}

.page-intro {
  color: #6b7280;
  font-size: 17px;
  margin-bottom: 40px;
  line-height: 1.6;
}

/* 内容区块 */
.section {
  margin-bottom: 36px;
}

.section h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 14px;
  color: #111827;
}

.section h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 8px;
  color: #111827;
}

.section p {
  color: #4b5563;
  line-height: 1.7;
  margin-bottom: 12px;
  font-size: 15px;
}

.section ul {
  padding-left: 20px;
  margin-bottom: 14px;
}

.section li {
  color: #4b5563;
  line-height: 1.7;
  margin-bottom: 6px;
  font-size: 15px;
}

.section strong {
  font-weight: 600;
  color: #1f2937;
}

/* FAQ */
.faq-item {
  background: rgba(255, 255, 255, 0.6);
  padding: 18px 20px;
  border-radius: 12px;
  margin-bottom: 12px;
  border: 1px solid rgba(0,0,0,0.04);
}

.faq-item h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 15px;
}

.faq-item p {
  margin-bottom: 0;
  font-size: 14px;
}

/* 联系框 */
.contact-box {
  background: #111827;
  color: #fff;
  padding: 28px 32px;
  border-radius: 16px;
  margin-top: 40px;
}

.contact-box h2 {
  color: #fff;
  font-size: 18px;
  margin-bottom: 12px;
}

.contact-box p {
  color: #d1d5db;
  margin-bottom: 8px;
  font-size: 15px;
}

.contact-box a {
  color: #fff;
}

.contact-btn {
  display: inline-block;
  background: #fff;
  color: #111827;
  padding: 12px 24px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  margin-top: 12px;
  transition: opacity 0.2s;
}

.contact-btn:hover {
  opacity: 0.9;
}

/* 页脚 */
.footer {
  padding: 24px 48px;
  text-align: center;
  border-top: 1px solid rgba(0,0,0,0.04);
}

.footer-links {
  margin-bottom: 12px;
}

.footer-links a {
  color: #6b7280;
  text-decoration: none;
  margin: 0 16px;
  font-size: 14px;
}

.footer-links a:hover {
  color: #111827;
}

.footer p {
  color: #9ca3af;
  font-size: 13px;
}

/* 链接 */
a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  background: rgba(0, 0, 0, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'SF Mono', Menlo, monospace;
}

/* 响应式 */
@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: 16px;
    padding: 16px 24px;
  }
  .nav-links {
    gap: 24px;
    font-size: 14px;
  }
  .main {
    padding: 32px 24px 60px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .page-title {
    font-size: 26px;
  }
  .footer {
    padding: 20px 24px;
  }
  .footer-links a {
    margin: 0 10px;
  }
}