/* =========================================================
   cases.css
   用途：案例页面专用样式
   说明：仅案例页面使用，包含案例卡片、筛选器等

   依赖：需先加载 bfk.css（提供 CSS 变量定义）
========================================================= */

/* ---------- Case cards ---------- */
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.case-card {
    background: var(--bfk-white);
    border: 1px solid var(--bfk-border);
    border-radius: var(--bfk-radius);
    padding: 24px;
    box-shadow: var(--bfk-shadow-sm);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.case-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--bfk-shadow);
}

.case-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(48, 86, 211, 0.08);
    color: var(--bfk-primary);
    margin-bottom: 12px;
}

.case-title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--bfk-text-primary);
}

.case-desc {
    font-size: 14px;
    line-height: 24px;
    color: var(--bfk-text-secondary);
    margin-bottom: 16px;
    flex-grow: 1;
}

.case-meta {
    font-size: 13px;
    color: var(--bfk-muted);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--bfk-border);
}

.case-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.case-actions {
    margin-top: auto;
}

.case-actions .ud-main-btn {
    padding: 10px 18px;
    font-size: 14px;
}

/* Case filters */
.case-filters {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.case-filter-btn {
    padding: 8px 20px;
    font-size: 14px;
    border: 1px solid var(--bfk-border);
    border-radius: 20px;
    background: var(--bfk-white);
    color: var(--bfk-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.case-filter-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0px 8px 25px rgba(48, 86, 211, 0.15);
}

.case-filter-btn.active {
    background-color: var(--bfk-primary);
    border-color: var(--bfk-primary);
    color: var(--bfk-white);
    font-weight: 600;
}

/* ---------- Case page sections ---------- */
.case-filter-section {
    padding-top: 80px;
    padding-bottom: 20px;
}

.case-list-section {
    padding-top: 20px;
}

/* Case stats */
.case-stats-row {
    margin-top: 40px;
}

.case-stat-number {
    font-size: 32px;
    color: var(--bfk-primary);
}

/* Case CTA */
.case-cta-text {
    margin-top: 16px;
    margin-bottom: 24px;
}

/* ---------- Responsive ---------- */
@media (max-width: 991px) {
    .case-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 20px;
    }
}

@media (max-width: 575px) {
    .case-grid {
        grid-template-columns: repeat(1, minmax(0, 1fr));
        gap: 16px;
    }

    .case-card {
        padding: 20px;
    }
}