/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: #333;
    background: #fff;
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

a:hover {
    color: #00a0e9;
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== 通用Section标题 ===== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #eee;
}

.section-title {
    display: flex;
    align-items: center;
    font-size: 22px;
    font-weight: bold;
    color: #333;
}

.section-title::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 18px;
    background: #00a0e9;
    margin-right: 10px;
    border-radius: 2px;
}

.section-title .subtitle {
    font-size: 13px;
    color: #999;
    font-weight: normal;
    margin-left: 12px;
}

.section-more {
    font-size: 13px;
    color: #00a0e9;
}

.section-more:hover {
    color: #0088cc;
}

/* ===== 通用卡片 ===== */
.card {
    background: #fff;
    border-radius: 4px;
    overflow: hidden;
    transition: box-shadow 0.3s;
}

.card:hover {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

/* ===== 通用按钮 ===== */
.btn {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    text-align: center;
}

.btn-primary {
    background: #00a0e9;
    color: #fff;
}

.btn-primary:hover {
    background: #0088cc;
    color: #fff;
}

/* ===== Tab切换 ===== */
.tabs {
    display: flex;
    border-bottom: 1px solid #eee;
    margin-bottom: 20px;
}

.tab-item {
    padding: 10px 20px;
    font-size: 14px;
    color: #666;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}

.tab-item:hover {
    color: #00a0e9;
}

.tab-item.active {
    color: #00a0e9;
    border-bottom-color: #00a0e9;
    font-weight: bold;
}

/* ===== 标签 ===== */
.tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 12px;
    border-radius: 3px;
    background: #e8f4fd;
    color: #00a0e9;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}