* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}
body {
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.7;
}
a {
    text-decoration: none;
    color: #333;
}
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 头部导航 */
.header {
    background: #2c3e50;
    color: #fff;
    padding: 1rem 0;
}
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 22px;
    font-weight: bold;
}
.nav-link a {
    color: #fff;
    margin-left: 20px;
    font-size: 15px;
}

/* 横幅 */
.banner {
    background: #34495e;
    color: #fff;
    text-align: center;
    padding: 40px 15px;
    margin-bottom: 30px;
}
.banner h2 {
    margin-bottom: 10px;
}

/* 文章列表 */
.article-list {
    display: grid;
    gap: 25px;
    margin-bottom: 40px;
}
.article-item {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.article-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: #2c3e50;
}
.meta {
    font-size: 13px;
    color: #888;
    margin-bottom: 12px;
}
.desc {
    color: #555;
    font-size: 14px;
}
.read-more {
    display: inline-block;
    margin-top: 10px;
    color: #3498db;
    font-size: 14px;
}

/* 详情页 */
.article-detail {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin: 30px 0;
}
.article-detail h2 {
    text-align: center;
    margin-bottom: 15px;
}
.detail-meta {
    text-align: center;
    color: #888;
    font-size: 14px;
    margin-bottom: 25px;
}
.content {
    font-size: 16px;
    color: #444;
}
.content p {
    margin-bottom: 16px;
}

/* 后台表单 */
.admin-box {
    background: #fff;
    padding: 25px;
    border-radius: 8px;
    margin: 30px auto;
    max-width: 700px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.form-item {
    margin-bottom: 18px;
}
.form-item label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}
.form-item input,
.form-item textarea,
.form-item select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}
textarea {
    min-height: 120px;
    resize: vertical;
}
.btn {
    background: #2c3e50;
    color: #fff;
    border: none;
    padding: 10px 25px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 15px;
}

/* 底部 */
.footer {
    text-align: center;
    padding: 25px 0;
    color: #999;
    font-size: 14px;
    border-top: 1px solid #eee;
    margin-top: 40px;
}