/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
    transition: all 0.3s ease;
}

:root {
    --bg-color: #f5f7fa;
    --text-color: #333;
    --card-bg: #fff;
    --nav-bg: #2c3e50;
    --btn-color: #3498db;
}

/* 暗黑模式变量 */
.dark {
    --bg-color: #1a1a2e;
    --text-color: #eee;
    --card-bg: #16213e;
    --nav-bg: #0f3460;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: "Microsoft Yahei", sans-serif;
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    width: 100%;
    height: 60px;
    background: var(--nav-bg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    position: sticky;
    top: 0;
    z-index: 99;
}

.logo {
    font-size: 20px;
    color: #fff;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    color: #fff;
    font-size: 16px;
}

#darkBtn {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: #fff;
    color: #333;
}

/* 横幅 */
.banner {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg,#3498db,#9b59b6);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.banner h1 {
    font-size: 38px;
    margin-bottom: 10px;
}

/* 容器通用 */
.container {
    width: 90%;
    max-width: 1000px;
    margin: 60px auto;
}

.title {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--btn-color);
}

/* 文章列表 */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fill,minmax(300px,1fr));
    gap: 25px;
}

.article-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.article-card h3 {
    margin-bottom: 8px;
}

.date {
    font-size: 14px;
    color: #888;
    display: block;
    margin-bottom: 15px;
}

.read-btn {
    margin-top: 15px;
    padding: 8px 16px;
    background: var(--btn-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

/* 关于我 */
.about-box {
    text-align: center;
    font-size: 17px;
    line-height: 2.2;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 20px;
    background: var(--nav-bg);
    color: #fff;
}

/* 手机适配 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 15px;
    }
    .banner h1 {
        font-size: 26px;
    }
}