* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

/* 全局容器 */
.container {
    width: 1200px;
    margin: 0 auto;
}

/* 顶部导航栏 */
.header {
    height: 80px;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
}
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo {
    font-size: 26px;
    font-weight: bold;
    color: #2563eb;
    text-decoration: none;
}
.nav-menu {
    display: flex;
    list-style: none;
}
.nav-menu li {
    margin-left: 40px;
}
.nav-menu a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    transition: 0.3s;
}
.nav-menu a:hover {
    color: #2563eb;
}
.nav-btn {
    padding: 10px 25px;
    background: #2563eb;
    color: #fff;
    border-radius: 4px;
    text-decoration: none;
}
.nav-btn:hover {
    background: #1d4ed8;
}

/* Banner区域 */
.banner {
    margin-top: 80px;
    height: 500px;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    display: flex;
    align-items: center;
    color: #fff;
}
.banner-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.banner-text h1 {
    font-size: 42px;
    margin-bottom: 20px;
    line-height: 1.3;
}
.banner-text p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}
.banner-btns a {
    display: inline-block;
    padding: 14px 35px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 16px;
    margin-right: 15px;
}
.btn-primary {
    background: #fff;
    color: #2563eb;
}
.btn-line {
    border: 1px solid #fff;
    color: #fff;
}
.banner-img {
    width: 450px;
}

/* 服务优势模块 */
.advantage {
    padding: 80px 0;
    background: #f8fafc;
}
.title {
    text-align: center;
    font-size: 32px;
    color: #333;
    margin-bottom: 60px;
}
.advantage-list {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.advantage-item {
    width: 23%;
    background: #fff;
    padding: 30px 20px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    transition: 0.3s;
}
.advantage-item:hover {
    transform: translateY(-5px);
}
.advantage-item h3 {
    font-size: 20px;
    margin: 20px 0 10px;
    color: #333;
}
.advantage-item p {
    color: #666;
    line-height: 1.6;
}

/* 短信类型模块 */
.sms-type {
    padding: 80px 0;
}
.type-list {
    display: flex;
    justify-content: space-between;
}
.type-item {
    width: 30%;
    text-align: center;
    padding: 40px 20px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
}
.type-item h3 {
    font-size: 22px;
    margin: 20px 0;
    color: #2563eb;
}
.type-item p {
    color: #666;
    line-height: 1.8;
}

/* 价格套餐模块 */
.price {
    padding: 80px 0;
    background: #f8fafc;
}
.price-list {
    display: flex;
    justify-content: center;
    gap: 30px;
}
.price-item {
    width: 300px;
    background: #fff;
    border-radius: 8px;
    padding: 40px 20px;
    text-align: center;
    border: 1px solid #e5e7eb;
}
.price-item h3 {
    font-size: 24px;
    margin-bottom: 20px;
}
.price-num {
    font-size: 36px;
    color: #2563eb;
    font-weight: bold;
    margin-bottom: 30px;
}
.price-item ul {
    list-style: none;
    margin-bottom: 30px;
}
.price-item li {
    padding: 10px 0;
    color: #666;
}
.price-btn {
    padding: 12px 30px;
    background: #2563eb;
    color: #fff;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
}

/* 客户案例 */
.case {
    padding: 80px 0;
}
.case-list {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.case-item {
    width: 18%;
    text-align: center;
    padding: 20px;
}
.case-item img {
    width: 100px;
    height: 100px;
    object-fit: contain;
    margin-bottom: 15px;
}

/* 底部footer */
.footer {
    background: #1e293b;
    color: #fff;
    padding: 60px 0 20px;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}
.footer-col h3 {
    font-size: 18px;
    margin-bottom: 20px;
}
.footer-col ul {
    list-style: none;
}
.footer-col li {
    margin-bottom: 10px;
}
.footer-col a {
    color: #94a3b8;
    text-decoration: none;
}
.footer-col a:hover {
    color: #fff;
}
.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #334155;
    color: #94a3b8;
}

/* 移动端适配 */
@media (max-width: 1200px) {
    .container {
        width: 95%;
    }
}
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    .banner {
        height: auto;
        padding: 60px 0;
    }
    .banner-content {
        flex-direction: column;
        text-align: center;
    }
    .banner-img {
        margin-top: 30px;
        width: 80%;
    }
    .advantage-item, .type-item, .price-item {
        width: 100%;
        margin-bottom: 20px;
    }
    .price-list {
        flex-direction: column;
        align-items: center;
    }
}