/* ===== 全局基础 ===== */

html, body {
    height: 100%;
    margin: 0;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    color: black;
    margin: 0;
    padding: 0;

    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== 主体结构 ===== */

main {
    flex: 1;
    width: 80%;
    margin: 30px auto;
}

/* ===== 头部 ===== */

#company_name {
    display: flex;
    align-items: flex-end;
    gap: 10px;
}

#logo {
    width: 35px;
    height: 35px;
}

h1 {
    margin: 0;
    padding: 0;
    line-height: 1;
    font-size: 30px;
    display: flex;
    align-items: center;
}

#banner {
    width: 100%;
    margin: 0;
    padding: 0;
}

/* ===== 导航 ===== */

nav {
    display: flex;
    align-items: flex-end;
    width: 100%;
    gap: 50px;
    padding: 20px;
    box-sizing: border-box;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

nav li {
    display: block;
}

#about {
    margin-left: auto;
    display: flex;
    gap: 20px;
}

a {
    color: black;
    text-decoration: none;
}

a:hover {
    color: hsl(0, 1%, 48%);
}

/* ===== 首页四宫格模块 ===== */

.tabs-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

/* 每个卡片 */
.tab-section {
    flex: 1 1 calc(50% - 20px);
    box-sizing: border-box;
    padding: 16px 20px 12px;   /* 底部 padding 减小 */
    border: 1px solid #ddd;
    border-radius: 10px;
    background-color: #fff;

    display: flex;
    flex-direction: column;

    min-height: 260px;        /* ✅ 视觉等高，但不会空 */
}

/* 标题 + 更多 */
.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.tab-header h2 {
    margin: 0;
    font-size: 18px;
}

.more {
    font-size: 14px;
    color: #1a73e8;
}

.more:hover {
    text-decoration: underline;
}

/* 内容列表（关键：不是 flex） */
.tab-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tab-list li {
    line-height: 1.6em;
    padding: 4px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 虚线分隔（不影响第一条） */
.tab-list li + li {
    border-top: 1px dashed #ddd;
}

/* ✅ 只显示前 6 行 */
.tab-list li:nth-child(n+7) {
    display: none;
}

/* ===== 页脚 ===== */

footer {
    text-align: center;
    color: #f2f2f2;
    background-color: #113583;
    padding: 10px 0;
    margin-top: auto;
}

/* ===== 响应式（手机） ===== */

@media (max-width: 800px) {
    .tab-section {
        flex: 1 1 100%;
        height: auto;
    }
}