/* 全局样式 */
:root {
  --primary-color: #1890ff;
  --secondary-color: #722ed1;
  --text-color: #333;
  --text-light: #666;
  --bg-color: #fff;
  --bg-light: #f5f7ff;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--bg-color);
}

h1,
h2,
h3,
h4 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

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

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

section {
  padding: 4rem 0;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.section-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-light);
  margin-bottom: 3rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* 安全英雄区域 */
.security-hero {
  background: linear-gradient(135deg, var(--bg-light), rgba(255, 255, 255, 0.8));
  padding: 6rem 0 4rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.security-hero h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 0;
}

/* 安全承诺 */
.security-commitment {
  background-color: var(--bg-color);
  padding: 4rem 0;
}

.security-commitment h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.commitment-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.commitment-card {
  background-color: white;
  padding: 2.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  text-align: center;
  border: 2px solid transparent;
}

.commitment-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
  border-color: var(--primary-color);
}

.commitment-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
}

.commitment-icon i {
  font-size: 2.5rem;
  color: white;
}

.commitment-icon svg {
  width: 2.5rem;
  height: 2.5rem;
  fill: white;
}

.commitment-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.commitment-card p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 0;
}

/* 安全措施 */
.security-measures {
  background: linear-gradient(135deg, var(--bg-light), rgba(255, 255, 255, 0.8));
  padding: 4rem 0;
}

.security-measures h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.measures-list {
  max-width: 900px;
  margin: 0 auto;
}

.measure-item {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 3rem;
  background-color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid rgba(24, 144, 255, 0.2);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.measure-item:hover {
  transform: translateX(10px);
  border-color: rgba(24, 144, 255, 0.4);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.measure-number {
  font-size: 3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  flex-shrink: 0;
  line-height: 1;
}

.measure-content {
  flex: 1;
}

.measure-content h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.measure-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.measure-details {
  list-style: none;
  padding: 0;
  margin: 0;
}

.measure-details li {
  padding: 0.75rem 0;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-light);
  line-height: 1.8;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.measure-details li:last-child {
  border-bottom: none;
}

.measure-details li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
  font-size: 1.2rem;
}

/* 合规认证 */
.compliance {
  background-color: var(--bg-color);
  padding: 4rem 0;
}

.compliance h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.compliance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.compliance-card {
  background-color: white;
  padding: 2.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  text-align: center;
}

.compliance-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.compliance-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
}

.compliance-icon i {
  font-size: 2.5rem;
  color: white;
}

.compliance-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.compliance-card p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 0;
}

/* 隐私政策 */
.privacy-policy {
  background: linear-gradient(135deg, var(--bg-light), rgba(255, 255, 255, 0.8));
  padding: 4rem 0;
}

.privacy-policy h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.policy-list {
  max-width: 900px;
  margin: 0 auto;
}

.policy-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 2rem;
  background-color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.policy-item:hover {
  transform: translateX(10px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.policy-item i {
  font-size: 2rem;
  color: var(--primary-color);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.policy-content {
  flex: 1;
}

.policy-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.policy-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 0;
}

.policy-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.5rem 0;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: 1rem;
}

.policy-link:hover {
  color: var(--secondary-color);
}

.policy-link::after {
  content: "→";
  font-size: 1.2rem;
  transition: var(--transition);
}

.policy-link:hover::after {
  transform: translateX(4px);
}

/* 联系安全团队 */
.security-contact {
  background-color: var(--bg-color);
  padding: 4rem 0;
}

.contact-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.contact-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.contact-content>p {
  font-size: 1.125rem;
  margin-bottom: 3rem;
  color: var(--text-light);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  background-color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  text-align: left;
}

.contact-item i {
  font-size: 2rem;
  color: var(--primary-color);
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.contact-item h4 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.contact-item p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 0;
}

.contact-item a {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 1.125rem;
}

.contact-item a:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

/* 导航链接激活状态 */
.nav-link.active {
  color: var(--primary-color);
}

.nav-link.active::after {
  width: 100%;
}

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

@media (max-width: 768px) {
  .security-hero {
    padding: 4rem 0 3rem;
  }

  .security-hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .security-commitment h2,
  .security-measures h2,
  .compliance h2,
  .privacy-policy h2,
  .contact-content h2 {
    font-size: 2rem;
  }

  .commitment-grid,
  .compliance-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .commitment-card,
  .compliance-card {
    padding: 2rem;
  }

  .measure-item {
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
  }

  .measure-number {
    font-size: 2rem;
  }

  .measure-details li {
    padding: 0.625rem 0;
    padding-left: 1.25rem;
    font-size: 0.9rem;
  }

  .policy-item {
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
  }

  .policy-link {
    margin-left: 0;
    margin-top: 0.5rem;
    align-self: flex-start;
    padding: 0.5rem 0;
    font-size: 0.9rem;
  }

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

  .contact-item {
    flex-direction: column;
    text-align: center;
  }
}