body { margin: 0; font-family: "Microsoft YaHei", Arial, sans-serif; }
:root {
    --primary: #2c3e50;
    --accent: #b8860b;
    --text-dark: #2c3e50;
    --text-gray: #6c757d;
    --bg-light: #f0f2f5;
    --border-color: #dee2e6;
    --max-w: 1200px;
}

.page-banner { position: relative; width: 100%; overflow: hidden; height: 300px; }
.page-banner img { width: 100%; height: 100%; display: block; object-fit: cover; }
.page-banner .banner-overlay {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    text-align: center; z-index: 2;
}
.page-banner .banner-overlay h1 {
    color: #fff; font-size: 36px; font-weight: bold;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3); margin: 0;
}

/* 面包屑 */
.breadcrumb-bar {
    background: #f8f8f8;
    padding: 12px 0;
    font-size: 14px;
    color: #999;
}
.breadcrumb-bar .container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 15px;
}
.breadcrumb-bar a {
    color: var(--text-dark);
    text-decoration: none;
}
.breadcrumb-bar a:hover {
    color: var(--accent);
}
.breadcrumb-bar .sep {
    margin: 0 8px;
    color: #ccc;
}
.breadcrumb-bar .current {
    color: var(--accent);
}

/* 左右布局 */
.about-layout {
    display: flex;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 40px 15px;
    gap: 40px;
}

/* 左侧栏 */
.about-sidebar {
    flex: 0 0 220px;
    position: sticky;
    top: 90px;
    align-self: flex-start;
    background: #fff;
    border: 1px solid var(--border-color);
}
.about-sidebar .sidebar-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    background: var(--primary);
    margin: 0;
    padding: 16px 18px;
    text-align: center;
    letter-spacing: 1px;
}
.about-sidebar .sidebar-menu {
    list-style: none;
    margin: 0;
    padding: 0;
}
.about-sidebar .sidebar-menu li {
    border-bottom: 1px solid var(--border-color);
    margin: 0;
}
.about-sidebar .sidebar-menu li:last-child {
    border-bottom: none;
}
.about-sidebar .sidebar-menu a {
    display: block;
    padding: 14px 18px;
    font-size: 14px;
    color: var(--text-dark);
    text-decoration: none;
    transition: all 0.3s;
    position: relative;
    border-left: 3px solid transparent;
}
.about-sidebar .sidebar-menu a:hover {
    color: var(--accent);
    background: #f8f6f0;
}
.about-sidebar .sidebar-menu .active a {
    color: var(--accent);
    border-left-color: var(--accent);
    background: #f8f6f0;
    font-weight: 600;
}

/* 右侧内容 */
.about-main {
    flex: 1;
    min-width: 0;
}
.about-content { padding: 0 0 30px; }
.about-content .content-title {
    font-size: 26px;
    color: var(--primary);
    font-weight: bold;
    margin: 0 0 8px;
    line-height: 1.4;
    text-align: left;
}
.about-content .content-divider {
    border: none;
    border-top: 3px solid var(--accent);
    width: 50px;
    margin: 0 0 25px;
}

.about-content .content-body { display: flex; gap: 40px; align-items: flex-start; }
.about-content .content-text {
    flex: 1; font-size: 15px; color: var(--text-gray);
    line-height: 1.8; min-width: 0;
}
.about-content .content-text p { margin: 0 0 15px; }
.about-content .content-image { flex: 0 0 400px; max-width: 100%; }
.about-content .content-image img {
    width: 100%; height: auto; display: block; border-radius: 6px;
}

.stats-wrap {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 30px;
    padding: 40px 20px;
    background: linear-gradient(135deg, #1a252f, #2c3e50);
    border-radius: 12px;
}
.stats-wrap .stat-item { text-align: center; flex: 1 1 200px; max-width: 280px; }
.stats-wrap .stat-num {
    font-size: 52px; font-weight: 800; color: #d4a843; line-height: 1;
    font-family: Arial, sans-serif;
}
.stats-wrap .stat-num span { font-size: 24px; color: rgba(255,255,255,0.5); }
.stats-wrap .stat-label {
    font-size: 15px; color: rgba(255,255,255,0.7);
    margin-top: 10px; line-height: 1.5;
}

.timeline-wrap { position: relative; padding: 10px 0 10px 40px; }
.timeline-wrap::before {
    content: ''; position: absolute; left: 14px; top: 0;
    width: 3px; height: 100%; background: #d4a843; border-radius: 2px;
}
.timeline-wrap .tl-item { position: relative; margin-bottom: 30px; padding-left: 30px; }
.timeline-wrap .tl-item::before {
    content: ''; position: absolute; left: -32px; top: 22px;
    width: 14px; height: 14px; background: var(--accent);
    border: 3px solid #fff; border-radius: 50%;
    box-shadow: 0 0 0 3px var(--accent); z-index: 2;
}
.timeline-wrap .tl-card {
    background: #fff; padding: 20px 25px; border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border-left: 3px solid var(--accent);
}
.timeline-wrap .tl-year { font-size: 13px; color: var(--accent); font-weight: 700; margin-bottom: 4px; }
.timeline-wrap .tl-card h4 { font-size: 17px; color: var(--text-dark); margin: 0 0 6px; }
.timeline-wrap .tl-card p { font-size: 14px; color: var(--text-gray); margin: 0; line-height: 1.6; }

.card-grid { display: grid; gap: 25px; }
.card-grid.col-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.col-4 { grid-template-columns: repeat(4, 1fr); }
.card-item {
    background: #fff; border-radius: 10px; overflow: hidden;
    transition: all 0.3s; text-align: center;
    border: 1px solid #eee;
}
.card-item:hover { transform: translateY(-4px); box-shadow: 0 8px 25px rgba(44,62,80,0.1); border-color: var(--accent); }
.card-body { padding: 30px 20px; }
.card-body .card-icon { font-size: 46px; display: block; margin-bottom: 12px; }
.card-body .card-title { font-size: 18px; color: var(--text-dark); font-weight: bold; margin: 0 0 8px; }
.card-body .card-desc { font-size: 14px; color: var(--text-gray); line-height: 1.7; margin: 0; }

.honor-card .card-img {
    width: 100%; height: 230px; overflow: hidden; display: flex;
    align-items: center; justify-content: center; background: #fafafa;
}
.honor-card .card-img img { max-width: 90%; max-height: 90%; object-fit: contain; }

.team-card { text-align: center; padding: 40px 20px; }
.team-card .team-avatar {
    width: 120px; height: 120px; border-radius: 50%; overflow: hidden;
    margin: 0 auto 15px; background: #f0f0f0;
}
.team-card .team-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.team-card .team-name { font-size: 18px; color: var(--text-dark); font-weight: bold; margin: 0 0 4px; }
.team-card .team-role { font-size: 14px; color: var(--accent); font-weight: 600; margin: 0 0 10px; }
.team-card .team-desc { font-size: 14px; color: var(--text-gray); line-height: 1.7; margin: 0; }

@media screen and (max-width: 768px) {
    .page-banner { height: 200px; }
    .page-banner .banner-overlay h1 { font-size: 24px; }
    .about-layout { flex-direction: column; padding: 20px 15px; gap: 20px; }
    .about-sidebar { flex: none; position: static; width: 100%; }
    .about-sidebar .sidebar-menu { display: block; }
    .about-sidebar .sidebar-menu li { border-bottom: 1px solid var(--border-color); border-right: none; }
    .about-sidebar .sidebar-menu li:last-child { border-bottom: none; }
    .about-sidebar .sidebar-menu a { padding: 14px 18px; font-size: 14px; border-left: none; text-align: center; }
    .about-sidebar .sidebar-menu .active a { border-left-color: transparent; border-bottom-color: transparent; background: #f8f6f0; }
    .about-content .content-body { flex-direction: column; }
    .about-content .content-image { flex: 0 0 100%; }
    .card-grid.col-3, .card-grid.col-4 { grid-template-columns: 1fr; }
    .timeline-wrap { padding-left: 20px; }
}