/* 重置基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: Arial, sans-serif;
  color: #333;
  line-height: 1.6;
}
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Header */
header {
  width: 100%;
  background-color: #007BFF;
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: #fff;
  font-size: 1.5rem;
  font-weight: bold;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}

nav ul li a:hover {
  color: #FFD700;
}

/* 汉堡 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background-color: #fff;
  border-radius: 2px;
  transition: 0.3s;
}

.hamburger.toggle span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.toggle span:nth-child(2) {
  opacity: 0;
}

.hamburger.toggle span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 手机端 */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  nav ul {
    position: absolute;
    top: 60px;
    left: 0;
	gap: 0;
    width: 100%;
    flex-direction: column;
    background-color: #fff;
    padding: 0 20px 10px;
    transform: translateY(-200%);
    z-index: 1001;
  }

  nav ul.active {
    transform: translateY(0);
  }

  nav ul li {
    margin: 0;
  }

  nav ul li a {
	color: #555;
    display: block;
    font-size: 1rem;
    padding-top:  10px;
  }

  .nav-overlay {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    height: calc(100% - 60px);
    background-color: rgba(0,0,0,0.3);
    z-index: 998;
  }

  .nav-overlay.active {
    display: block;
  }
}

/* Banner 模块 */
.banner {
  width: 100%;
  background-color: #0366d0;
  padding: 60px 20px 60px;
  text-align: center;
  position: relative;
}

.banner h1 {
	color: #fff;
	font-size: 2.5rem;
	margin-bottom: 20px;
	font-weight: bold;
}

.banner p {
	color: #fff;
	font-size: 1.2rem;
	margin-bottom: 30px;
	max-width: 800px;
	margin-left: auto;
	margin-right: auto;
}

.banner .btn {
  padding: 12px 30px;
  background-color: #fff;
  color: #007BFF;
  text-decoration: none;
  font-weight: bold;
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.banner .btn:hover {
  background-color: #eff8ff;
}

/* 响应式 */
@media (max-width: 768px) {
  .banner {
    padding: 60px 15px 40px;
  }

  .banner h1 {
    font-size: 1.8rem;
  }

  .banner p {
    font-size: 1rem;
  }
}

/* Overview 部分 */
.section-overview {
  margin: 60px 0;
  text-align: center;
}
.overview-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}
.card {
  flex: 1 1 200px;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
}
.card-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  margin: 0 auto 10px;
}
.card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.card p {
  font-size: 0.95rem;
  color: #555;
}

/* 云服务部分 */
.section-clouds {
  margin: 40px 0;
}
.section-clouds h2 {
  text-align: center;
  margin-bottom: 20px;
}
.cloud-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}
.cloud-card {
  flex: 1 1 250px;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.cloud-image {
  height: 150px;
  border-bottom: 1px solid #ccc;
}
.cloud-info {
  padding: 20px;
}
.cloud-info h3 {
  margin-bottom: 10px;
  font-size: 1.3rem;
}
.cloud-info p {
  font-size: 0.95rem;
  color: #555;
}

/* 对比表 */
.seo-table-wrap {
  overflow-x: auto;
}

.seo-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

.seo-table th, .seo-table td {
  border: 1px solid #ddd;
  padding: 10px;
  text-align: center;
  font-size: 0.95rem;
}

.seo-table th {
  background-color: #007BFF;
  color: #fff;
}

/* FAQ */
.seo-faq {
  margin-bottom: 20px;
}

.faq-item {
  margin-bottom: 10px;
}

.faq-item strong {
  display: block;
  margin-bottom: 5px;
  color: #007BFF;
}

/* 应用场景案例 */
.seo-cases {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.case-card {
  flex: 1 1 200px;
  border-radius: 8px;
  color: #fff;
  padding: 20px;
  text-align: center;
}

.case-card h4 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.case-card p {
  font-size: 0.95rem;
}

/* 联系部分 */
.section-contact {
  margin: 40px 0;
  text-align: center;
}
.section-contact h2 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}
.section-contact p {
  margin-bottom: 20px;
  color: #555;
}
.section-contact .btn {
  padding: 12px 24px;
  background-color: #007BFF;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}
.section-contact .btn:hover {
  background-color: #0056b3;
}

/* Footer */
footer {
  background: #f1f1f1;
  padding: 20px 0;
  text-align: center;
  font-size: 0.9rem;
  color: #666;
}

/* 响应式 */
@media (max-width: 768px) {
  .overview-cards, .cloud-cards {
    flex-direction: column;
    align-items: center;
  }
  .card, .cloud-card {
    width: 100%;
  }
}