/* ==========================================================================
   典型案例 cases.html 专属样式
   ========================================================================== */

/* ---------- 战果数据 ---------- */
.case-stats {
    background: linear-gradient(135deg, var(--red-deep) 0%, var(--red-primary) 100%);
    color: #fff;
    padding: 64px 0;
    position: relative;
    overflow: hidden;
}

.case-stats::before {
    content: '案';
    position: absolute;
    top: -60px;
    right: 80px;
    font-family: var(--serif);
    font-size: 240px;
    font-weight: 900;
    color: rgba(255,255,255,.06);
    line-height: 1;
}

.case-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.cs-item {
    text-align: center;
    padding: 24px 16px;
    border: 1px solid rgba(255,255,255,.15);
    border-radius: 4px;
    transition: var(--transition);
}

.cs-item:hover {
    background: rgba(255,255,255,.08);
    transform: translateY(-4px);
}

.cs-num {
    font-family: var(--serif);
    font-size: 56px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
}

.cs-num sup {
    font-size: 22px;
    margin-left: 4px;
}

.cs-label {
    font-size: 15px;
    opacity: .9;
    letter-spacing: 1px;
}

/* ---------- 案例筛选 ---------- */
.case-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 10px 24px;
    background: #fff;
    border: 1px solid var(--line-gray);
    color: var(--ink-gray);
    font-size: 14px;
    font-weight: 500;
    border-radius: 24px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--red-primary);
    color: var(--red-primary);
}

.filter-btn.active {
    background: var(--red-primary);
    border-color: var(--red-primary);
    color: #fff;
}

/* ---------- 案例卡片网格 ---------- */
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: #fff;
    border: 1px solid var(--line-gray);
    border-radius: 4px;
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--red-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.case-card:hover {
    border-color: var(--red-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.case-card:hover::before {
    transform: scaleX(1);
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--red-pale);
    color: var(--red-primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 2px;
    margin-bottom: 16px;
    letter-spacing: 1px;
    align-self: flex-start;
}

.case-card h3 {
    font-family: var(--serif);
    font-size: 18px;
    font-weight: 700;
    color: var(--ink-black);
    line-height: 1.5;
    margin-bottom: 12px;
    letter-spacing: 1px;
    min-height: 54px;
}

.case-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--line-gray);
}

.case-meta .case-year {
    font-family: var(--serif);
    font-size: 14px;
    color: var(--ink-light);
    font-weight: 500;
}

.case-meta .case-amount {
    font-size: 13px;
    color: var(--red-primary);
    font-weight: 700;
    background: var(--red-pale);
    padding: 2px 10px;
    border-radius: 2px;
}

.case-card p {
    font-size: 13px;
    color: var(--ink-gray);
    line-height: 1.8;
    margin-bottom: 16px;
    flex: 1;
}

.case-result {
    background: var(--red-pale);
    border-left: 3px solid var(--red-primary);
    padding: 12px 16px;
    border-radius: 0 4px 4px 0;
    margin-bottom: 12px;
}

.case-result strong {
    display: block;
    font-family: var(--serif);
    font-size: 13px;
    color: var(--red-primary);
    margin-bottom: 4px;
    letter-spacing: 1px;
}

.case-result span {
    font-size: 13px;
    color: var(--ink-black);
    font-weight: 500;
}

.case-impact {
    padding-top: 12px;
    border-top: 1px dashed var(--line-gray);
    font-size: 12px;
    color: var(--ink-light);
}

/* ---------- 媒体报道 ---------- */
.media-coverage {
    background: var(--bg-cream);
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.media-card {
    background: #fff;
    padding: 32px 24px;
    border-radius: 4px;
    text-align: center;
    border-bottom: 3px solid var(--red-primary);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.media-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.media-card .media-logo {
    font-size: 32px;
    margin-bottom: 16px;
    font-weight: 700;
    color: var(--red-primary);
    letter-spacing: 2px;
}

.media-card h4 {
    font-family: var(--serif);
    font-size: 18px;
    font-weight: 700;
    color: var(--ink-black);
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.media-card p {
    font-size: 13px;
    color: var(--ink-gray);
    line-height: 1.7;
}

/* ---------- 服务客户列表 ---------- */
.clients-section {
    background: var(--bg-paper);
}

.client-list-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.cl-item {
    padding: 20px 12px;
    background: var(--bg-cream);
    border: 1px solid var(--line-gray);
    border-radius: 4px;
    text-align: center;
    font-size: 13px;
    color: var(--ink-gray);
    transition: var(--transition);
    line-height: 1.4;
}

.cl-item:hover {
    border-color: var(--red-primary);
    color: var(--red-primary);
    background: #fff;
    transform: translateY(-2px);
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
    .case-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .media-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .client-list-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .cs-num {
        font-size: 42px;
    }
}

@media (max-width: 768px) {
    .case-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .case-grid {
        grid-template-columns: 1fr;
    }

    .media-grid {
        grid-template-columns: 1fr;
    }

    .client-list-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-filter {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 8px;
    }

    .filter-btn {
        flex-shrink: 0;
    }
}