/* ================================================================
   xyzy.css — 学院专业页面专用样式
   包含：布局、卡片网格、分页及完整响应式适配
   依赖：common.css (需在页面中先加载)
   ================================================================ */

/* ===== 页面主容器 ===== */
.main-content {
    position: relative;
    z-index: 2;
    background: #f7f9fc;
    padding-top: 32px;
    padding-bottom: 56px;
}

.page-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

/* ===== 左侧菜单（当前页面隐藏，保留以备后用） ===== */
.sidebar-menu {
    flex: 0 0 300px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: box-shadow var(--transition);
    position: sticky;
    top: 20px;
    display: none;
}
.sidebar-menu:hover {
    box-shadow: var(--shadow-hover);
}
.sidebar-menu .menu-header {
    padding: 20px 24px 16px;
    border-bottom: 2px solid var(--primary);
    background: linear-gradient(135deg, #f8faff 0%, #f0f5fa 100%);
}
.sidebar-menu .menu-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 2px;
}
.sidebar-menu .menu-toggle {
    display: none;
    padding: 14px 24px;
    font-weight: 600;
    font-size: 17px;
    color: var(--primary);
    background: #f8faff;
    cursor: pointer;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    user-select: none;
}
.sidebar-menu .menu-toggle .arrow-icon {
    transition: transform 0.3s ease;
    font-size: 14px;
}
.sidebar-menu .menu-toggle.open .arrow-icon {
    transform: rotate(180deg);
}
.sidebar-menu .menu-list {
    padding: 6px 0;
}
.sidebar-menu .menu-list.hidden {
    display: none;
}
.sidebar-menu .level1-item {
    border-bottom: 1px solid #f0f2f5;
}
.sidebar-menu .level1-item:last-child {
    border-bottom: none;
}
.sidebar-menu .level1-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
    transition: background var(--transition);
    border-left: 3px solid transparent;
}
.sidebar-menu .level1-row:hover {
    background: #f0f5fa;
}
.sidebar-menu .level1-item.active>.level1-row {
    border-left-color: var(--primary);
    background: #f0f5fa;
}
.sidebar-menu .level1-link {
    flex: 1;
    padding: 14px 12px 14px 24px;
    font-weight: 600;
    font-size: 17px;
    color: var(--text);
    transition: color var(--transition);
    text-decoration: none;
    display: block;
    min-width: 0;
}
.sidebar-menu .level1-link:hover {
    color: var(--primary);
}
.sidebar-menu .level1-item.active>.level1-row .level1-link {
    color: var(--primary);
}
.sidebar-menu .level1-toggle {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    color: #999;
    transition: transform 0.3s ease, color 0.3s ease;
    user-select: none;
    border: none;
    background: transparent;
    font-family: var(--font);
}
.sidebar-menu .level1-toggle:hover {
    color: var(--primary);
}
.sidebar-menu .level1-item.open>.level1-row .level1-toggle {
    transform: rotate(90deg);
    color: var(--primary);
}
.sidebar-menu .level1-item.no-children .level1-toggle {
    display: none;
}
.sidebar-menu .level2-wrap {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
    background: #f8faff;
}
.sidebar-menu .level1-item.open .level2-wrap {
    max-height: 600px;
    opacity: 1;
}
.sidebar-menu .level2-item a {
    display: block;
    padding: 10px 24px 10px 48px;
    font-size: 16px;
    font-weight: 400;
    color: var(--text-light);
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    border-left: 3px solid transparent;
    position: relative;
    text-decoration: none;
}
.sidebar-menu .level2-item a::before {
    content: "—";
    position: absolute;
    left: 28px;
    font-size: 14px;
    opacity: 0.25;
    transition: opacity 0.3s ease;
}
.sidebar-menu .level2-item a:hover {
    background: #edf3fa;
    color: var(--primary);
    border-left-color: var(--primary);
}
.sidebar-menu .level2-item a:hover::before {
    opacity: 0.6;
}
.sidebar-menu .level2-item.active a {
    background: var(--primary);
    color: #fff;
    border-left-color: var(--accent);
    font-weight: 600;
}
.sidebar-menu .level2-item.active a::before {
    opacity: 1;
    color: #fff;
}
.sidebar-menu .level2-item.active a:hover {
    background: var(--primary-light);
    color: #fff;
}

/* ===== 右侧内容区域 ===== */
.main-content-area {
    flex: 1;
    min-width: 0;
    width: 100%;
}

/* ===== 面包屑 ===== */
.breadcrumb-area {
    background: #fff;
    padding: 16px 28px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 28px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px 10px;
    font-size: 17px;
    color: var(--text-light);
}
.breadcrumb-area .home-link {
    color: var(--primary);
    font-weight: 500;
}
.breadcrumb-area .home-link:hover {
    text-decoration: underline;
}
.breadcrumb-area .sep {
    color: #ccc;
    margin: 0 4px;
}
.breadcrumb-area .current {
    color: var(--text);
    font-weight: 500;
}

/* ===== 学院卡片网格容器 ===== */
.college-grid-wrap {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: box-shadow var(--transition);
    padding: 28px 28px 32px;
}
.college-grid-wrap:hover {
    box-shadow: var(--shadow-hover);
}
.college-grid-wrap .grid-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding-bottom: 16px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.college-grid-wrap .grid-header .grid-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}
.college-grid-wrap .grid-header .grid-count {
    font-size: 15px;
    color: var(--text-light);
    background: var(--primary-bg);
    padding: 2px 16px;
    border-radius: 20px;
}

/* ===== 卡片网格 — 默认3列 ===== */
.college-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* ===== 学院卡片 ===== */
.college-card {
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}
.college-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(10, 61, 107, 0.12);
}

/* 卡片头部 — 学院名称 + 详情按钮 */
.college-card .card-header {
    padding: 16px 20px 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
}
.college-card .card-header .header-left {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

/* 学院名称 — 可点击链接 */
.college-card .card-header .college-name-link {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.5px;
    line-height: 1.3;
    color: #fff;
    text-decoration: none;
    transition: opacity 0.3s ease;
    display: inline-block;
}
.college-card .card-header .college-name-link:hover {
    opacity: 0.8;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.college-card .card-header .college-name-link:active {
    opacity: 0.6;
}

.college-card .card-header .college-code {
    font-size: 13px;
    opacity: 0.75;
    margin-top: 2px;
    font-weight: 400;
}

/* 详情更多按钮 — 固定在右侧 */
.college-card .card-header .detail-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 20px;
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    font-family: var(--font);
    white-space: nowrap;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.college-card .card-header .detail-btn:hover {
    background: rgba(255, 255, 255, 0.32);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}
.college-card .card-header .detail-btn:active {
    transform: translateY(0) scale(0.96);
}
.college-card .card-header .detail-btn .btn-icon {
    font-size: 14px;
    line-height: 1;
    transition: transform 0.3s ease;
}
.college-card .card-header .detail-btn:hover .btn-icon {
    transform: translateX(2px);
}

/* 卡片主体 — 专业列表 */
.college-card .card-body {
    padding: 14px 20px 18px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.college-card .card-body .major-item {
    font-size: 15px;
    color: var(--text);
    padding: 4px 0 4px 16px;
    border-bottom: 1px dashed #f0f2f5;
    position: relative;
    transition: color var(--transition);
    line-height: 1.5;
}
.college-card .card-body .major-item:last-child {
    border-bottom: none;
}
.college-card .card-body .major-item::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--primary);
    opacity: 0.5;
    font-size: 12px;
    transition: transform 0.2s ease;
}
.college-card:hover .card-body .major-item {
    color: var(--primary);
}
.college-card:hover .card-body .major-item::before {
    opacity: 0.9;
    transform: translateX(2px);
}

/* 卡片底部 — 专业数量 */
.college-card .card-footer {
    padding: 8px 20px 14px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-light);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}
.college-card .card-footer .major-count {
    font-weight: 600;
    color: var(--primary);
}

/* ===== 分页 ===== */
.pagination-wrap {
    padding: 18px 28px 0px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 8px;
    border-top: 1px solid var(--border);
}
.pagination-wrap .page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text-light);
    font-size: 16px;
    cursor: pointer;
    transition: all 0.25s ease;
    font-family: var(--font);
}
.pagination-wrap .page-btn:hover {
    background: var(--primary-bg);
    border-color: var(--primary);
    color: var(--primary);
}
.pagination-wrap .page-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.pagination-wrap .page-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ================================================================
   响应式适配
   ================================================================ */

/* ===== 1200px 以下 ===== */
@media (max-width: 1200px) {
    .sidebar-menu {
        flex: 0 0 260px;
    }
    .college-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .college-card .card-header .college-name-link {
        font-size: 17px;
    }
}

/* ===== 992px 以下（平板） ===== */
@media (max-width: 992px) {
    .page-layout {
        flex-direction: column;
        gap: 28px;
    }
    .sidebar-menu {
        flex: 1 1 auto;
        width: 100%;
        position: static;
    }
    .sidebar-menu .menu-toggle {
        display: flex;
    }
    .sidebar-menu .menu-list {
        display: block;
    }
    .sidebar-menu .menu-list.hidden {
        display: none;
    }
    .sidebar-menu .level2-item a {
        padding-left: 40px;
    }
    .sidebar-menu .level2-item a::before {
        left: 20px;
    }
    .sidebar-menu .level1-link {
        padding: 14px 12px 14px 20px;
        font-size: 16px;
    }
    .college-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }
    .college-grid-wrap {
        padding: 20px 18px 24px;
    }
    .college-grid-wrap .grid-header .grid-title {
        font-size: 20px;
    }
    .college-card .card-header .college-name-link {
        font-size: 17px;
    }
    .college-card .card-header .detail-btn {
        font-size: 12px;
        padding: 5px 12px;
    }
}

/* ===== 768px 以下（手机） ===== */
@media (max-width: 768px) {
    .main-content {
        padding-top: 20px;
        padding-bottom: 28px;
    }

    /* 面包屑 */
    .breadcrumb-area {
        padding: 12px 18px;
        font-size: 15px;
        border-radius: var(--radius-sm);
        margin-bottom: 18px;
    }

    /* 卡片网格容器 */
    .college-grid-wrap {
        padding: 16px 14px 20px;
    }
    .college-grid-wrap .grid-header {
        margin-bottom: 18px;
        padding-bottom: 12px;
    }
    .college-grid-wrap .grid-header .grid-title {
        font-size: 19px;
    }
    .college-grid-wrap .grid-header .grid-count {
        font-size: 13px;
        padding: 2px 12px;
    }

    /* 卡片网格 — 2列 */
    .college-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }

    /* 卡片样式 */
    .college-card .card-header {
        padding: 12px 16px 10px;
        gap: 10px;
        flex-wrap: nowrap;
    }
    .college-card .card-header .college-name-link {
        font-size: 16px;
    }
    .college-card .card-header .college-code {
        font-size: 12px;
        margin-top: 1px;
    }
    .college-card .card-header .detail-btn {
        font-size: 12px;
        padding: 4px 12px;
        gap: 3px;
    }
    .college-card .card-header .detail-btn .btn-icon {
        font-size: 12px;
    }

    .college-card .card-body {
        padding: 10px 16px 14px;
        gap: 2px;
    }
    .college-card .card-body .major-item {
        font-size: 14px;
        padding: 3px 0 3px 14px;
    }
    .college-card .card-body .major-item::before {
        font-size: 11px;
    }

    .college-card .card-footer {
        padding: 6px 16px 12px;
        font-size: 12px;
    }

    /* 分页 */
    .pagination-wrap {
        padding: 14px 0 0;
        gap: 4px;
        flex-wrap: wrap;
    }
    .pagination-wrap .page-btn {
        min-width: 36px;
        height: 36px;
        font-size: 15px;
        padding: 0 10px;
    }
}

/* ===== 480px 以下（小屏手机） ===== */
@media (max-width: 480px) {
    .breadcrumb-area {
        padding: 8px 12px;
        font-size: 14px;
        gap: 2px 6px;
    }

    .college-grid-wrap {
        padding: 12px 10px 16px;
    }
    .college-grid-wrap .grid-header {
        margin-bottom: 14px;
        padding-bottom: 10px;
    }
    .college-grid-wrap .grid-header .grid-title {
        font-size: 17px;
    }
    .college-grid-wrap .grid-header .grid-count {
        font-size: 12px;
        padding: 1px 10px;
    }

    /* 卡片网格 — 仍保持2列，但更紧凑 */
    .college-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .college-card .card-header {
        padding: 10px 12px 8px;
        gap: 6px;
        flex-wrap: nowrap;
    }
    .college-card .card-header .college-name-link {
        font-size: 14px;
        letter-spacing: 0.3px;
    }
    .college-card .card-header .college-code {
        font-size: 11px;
        margin-top: 0;
    }
    .college-card .card-header .detail-btn {
        font-size: 11px;
        padding: 3px 10px;
        gap: 2px;
    }
    .college-card .card-header .detail-btn .btn-icon {
        font-size: 11px;
    }

    .college-card .card-body {
        padding: 8px 12px 10px;
        gap: 1px;
    }
    .college-card .card-body .major-item {
        font-size: 13px;
        padding: 2px 0 2px 12px;
    }
    .college-card .card-body .major-item::before {
        font-size: 10px;
    }

    .college-card .card-footer {
        padding: 4px 12px 10px;
        font-size: 11px;
    }
    .college-card .card-footer .major-count {
        font-size: 13px;
    }

    .pagination-wrap .page-btn {
        min-width: 32px;
        height: 32px;
        font-size: 14px;
        padding: 0 8px;
    }
}

/* ===== 360px 以下（超小屏） ===== */
@media (max-width: 360px) {
    .college-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .college-card .card-header .college-name-link {
        font-size: 16px;
    }
    .college-card .card-body .major-item {
        font-size: 14px;
    }

    .breadcrumb-area {
        font-size: 13px;
        padding: 6px 10px;
    }
    .college-grid-wrap .grid-header .grid-title {
        font-size: 16px;
    }
}