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

html, body {
    background-color: #f5f7fa;
    margin: 0;
    padding: 0;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    text-decoration: none;
    color: #333;
}

ul {
    list-style: none;
}

/* 头部导航 手机适配 */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 999;
}
.header .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 22px;
    font-weight: bold;
    color: #2563eb;
    margin-bottom:10px;
}
.nav {
    display:flex;
    flex-wrap:wrap;
}
.nav a {
    margin:5px 10px;
    font-size: 15px;
}
.nav a:hover {
    color: #2563eb;
}

/* 首页Banner 手机自适应 */
.banner {
    height: auto;
    padding:80px 20px;
    background: linear-gradient(90deg, #1e40af, #3b82f6);
    color: #fff;
    display: flex;
    align-items: center;
    text-align: center;
}
.banner h1 {
    font-size: 30px;
    margin-bottom: 20px;
}
.banner p {
    font-size: 16px;
    margin-bottom: 30px;
}
.btn {
    display: inline-block;
    padding: 12px 30px;
    background: #fff;
    color: #2563eb;
    border-radius: 5px;
    font-weight: bold;
}

/* 首页服务模块 */
.section {
    padding: 60px 0;
    background: #fff;
}
.title {
    text-align: center;
    font-size: 26px;
    margin-bottom: 40px;
    color: #1e293b;
}
.service-box {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}
.service-item {
    width: 100%;
    max-width:350px;
    padding: 25px;
    background: #fff;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
    border-radius: 8px;
    text-align: center;
}
.service-item h3 {
    font-size: 18px;
    margin: 15px 0;
    color: #2563eb;
}

/* 内页全局 手机完美适配 */
.page {
    padding: 40px 0;
    min-height: calc(100vh - 165px);
    background-color: #f5f7fa;
}
.page .container {
    background: #fff;
    padding: 25px 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}
.page h2 {
    font-size: 22px;
    margin-bottom: 25px;
    color: #1e293b;
    border-left: 4px solid #2563eb;
    padding-left: 12px;
}
.page p {
    font-size: 15px;
    line-height: 1.8;
    color: #444;
    margin-bottom: 12px;
}

/* 底部 */
.footer {
    background: #1e293b;
    color: #fff;
    text-align: center;
    padding: 25px 15px;
    width: 100%;
    font-size:14px;
}