/* 全局重置与基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: "Microsoft Yahei", "PingFang SC", sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.7;
}
a {
    text-decoration: none;
    color: #066cc8;
    transition: all 0.3s ease;
}
a:hover {
    color: #034888;
    text-decoration: underline;
}

/* 头部导航栏 */
.header {
    background-color: #066cc8;
    height: 70px;
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
.logo {
    font-size: 26px;
    color: #fff;
    font-weight: bold;
    letter-spacing: 1px;
}
.nav a {
    color: #fff;
    margin: 0 14px;
    font-size: 15px;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
}
.nav a:hover {
    color: #ffd700;
    border-bottom: 2px solid #ffd700;
}
.login a {
    color: #fff;
    border: 1px solid #fff;
    padding: 7px 18px;
    border-radius: 4px;
    transition: all 0.3s ease;
}
.login a:hover {
    background-color: #fff;
    color: #066cc8;
    text-decoration: none;
}

/* 横幅区域（绝对路径，所有页面都能显示图片） */
.banner {
    width: 100%;
    height: 340px;
    background: #066cc8 url('https://picsum.photos/id/180/1920/1080') center/cover no-repeat !important;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    position: relative;
}
.banner::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(6, 108, 200, 0.75);
}
.banner-text {
    position: relative;
    z-index: 1;
}
.banner-text h1 {
    font-size: 42px;
    margin-bottom: 18px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}
.banner-text p {
    font-size: 20px;
    opacity: 0.95;
}

/* 内容区块 */
.section {
    width: 1200px;
    margin: 45px auto;
    padding: 0 20px;
}
.section h2 {
    font-size: 26px;
    margin-bottom: 25px;
    border-left: 6px solid #066cc8;
    padding-left: 16px;
    color: #222;
}
.section .content-box {
    background-color: #fff;
    padding: 32px;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}
.section .content-box p {
    margin-bottom: 16px;
    font-size: 15px;
}
.section .content-box h3 {
    font-size: 20px;
    margin: 20px 0 10px;
    color: #066cc8;
}
.section .content-box hr {
    border: none;
    border-top: 1px solid #eee;
    margin: 20px 0;
}

/* 列表卡片样式 */
.card-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.card {
    background-color: #fff;
    padding: 22px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}
.card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}
.card p {
    font-size: 14px;
    color: #666;
}

/* 底部版权 */
.footer {
    background-color: #2d3436;
    color: #b2bec3;
    text-align: center;
    padding: 35px 0;
    margin-top: 60px;
}
.footer p {
    margin: 10px 0;
    font-size: 14px;
}