/* ==================== Header ==================== */
.cases-header {
    height: 45vh;
    background-color: var(--bg-dark);
    padding-top: var(--nav-height);
    background-image: radial-gradient(circle at top, #1e293b 0%, #0f172a 100%);
}

/* ==================== Case 1: 剧院模式 ==================== */
.case-theater {
    padding: 80px 0 100px 0;
    background: #0f172a; 
}

.browser-mockup {
    border-radius: 12px;
    background: #1e293b;
    border: 1px solid rgba(255,255,255,0.1);
    overflow: hidden;
}

.browser-header {
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid rgba(0,0,0,0.2);
}

.dot { width: 10px; height: 10px; border-radius: 50%; }

.glow-effect {
    position: absolute;
    top: -50%; left: 50%; transform: translateX(-50%);
    width: 80%; height: 80%;
    background: radial-gradient(circle, rgba(13, 110, 253, 0.15) 0%, transparent 70%);
    pointer-events: none; z-index: 1;
}

.backdrop-blur { backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }

/* ==================== Case 2: 对比卡片 ==================== */
.arrow-circle { width: 60px; height: 60px; z-index: 2; }
.challenge-card:hover { transform: translateY(-5px); transition: transform 0.3s; }
.solution-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(0,0,0,0.2) !important; transition: transform 0.3s; }
.space-y-3 li { margin-bottom: 1rem; }

/* ==================== Case 3: 玻璃拟态 ==================== */
.case-overlay { min-height: 80vh; padding: 100px 0; }
.bg-image-holder {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover; background-position: center; z-index: 0;
}
.bg-image-holder::after {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.8);
}
.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* ==================== Case 4: 非对称网格 ==================== */
.list-group-item { background: transparent; }
.progress-bar { transition: width 1s ease; }

/* ==================== Case 5: 深色渐变 ==================== */
.bg-dark-gradient {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
}
.stack-card {
    transition: transform 0.3s ease, border-color 0.3s ease;
}
.stack-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255,255,255,0.3);
}
.transform-scale { transform: scale(1.05); } /* 中间卡片稍微大一点 */

/* ==================== 通用微调 ==================== */
@media (max-width: 768px) {
    .arrow-circle { margin: 20px 0; transform: rotate(90deg); }
    .transform-scale { transform: scale(1); }
}