/* 全局样式 - 企业商务风格 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Roboto, 'Noto Sans', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: #ffffff;
    letter-spacing: 0.3px;
}

body {
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* 页面标题 */
.page-header {
    margin-bottom: 40px;
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5px;
}

.subtitle {
    font-size: 16px;
    color: rgba(226, 232, 240, 0.7);
    font-weight: 400;
    letter-spacing: 0.3px;
}

/* 标题样式 */
h2, h3 {
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* 播放器包装器 */
.player-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 
                0 0 1px rgba(255, 255, 255, 0.1) inset;
    margin-bottom: 40px;
    border: 1px solid rgba(148, 163, 184, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.player-wrapper:hover {
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.5),
                0 0 1px rgba(255, 255, 255, 0.15) inset;
}

/* 视频元素 */
.video-player {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    background-color: #000000;
}

/* 播放器控制条 - 磨砂玻璃效果 */
.player-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, 
        rgba(15, 23, 42, 0.95) 0%,
        rgba(30, 41, 59, 0.85) 50%,
        transparent 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 50px 20px 20px 20px;
    opacity: 0;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.player-wrapper:hover .player-controls,
.player-wrapper:active .player-controls {
    opacity: 1;
}

/* 进度条容器 */
.progress-bar-container {
    width: 100%;
    margin-bottom: 16px;
    cursor: pointer;
    padding: 0 4px;
}

.progress-bar {
    position: relative;
    width: 100%;
    height: 5px;
    background-color: rgba(148, 163, 184, 0.2);
    border-radius: 3px;
    overflow: visible;
    transition: height 0.2s ease;
}

.progress-bar:hover {
    height: 7px;
}

.progress-fill {
    position: absolute;
    height: 100%;
    background: linear-gradient(to right, #3b82f6, #06b6d4);
    border-radius: 3px;
    transition: width 0.1s linear;
    box-shadow: 0 0 12px rgba(59, 130, 246, 0.5);
}

.progress-handle {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 14px;
    height: 14px;
    background-color: #ffffff;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.6);
    opacity: 0;
    transition: opacity 0.2s ease, box-shadow 0.2s ease;
}

.progress-bar:hover .progress-handle {
    opacity: 1;
}

/* 控制条底部 */
.controls-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.controls-left,
.controls-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 控制按钮 */
.control-btn {
    background: rgba(148, 163, 184, 0.1);
    border: 1px solid rgba(148, 163, 184, 0.2);
    color: #e2e8f0;
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(8px);
}

.control-btn:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: rgba(59, 130, 246, 0.4);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.control-btn:active {
    background: rgba(59, 130, 246, 0.3);
    transform: translateY(0);
}

.icon {
    width: 24px;
    height: 24px;
}

/* 音量控制 */
.volume-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.volume-slider {
    width: 90px;
    height: 5px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(148, 163, 184, 0.2);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.volume-slider:hover {
    background: rgba(148, 163, 184, 0.3);
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background-color: #ffffff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.6);
    transition: all 0.2s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background-color: #ffffff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.6);
    transition: all 0.2s ease;
}

.volume-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
}

/* 时间显示 */
.time-display {
    font-size: 13px;
    color: rgba(226, 232, 240, 0.8);
    white-space: nowrap;
    min-width: 70px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* 播放列表容器 */
.playlist-container {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 28px;
    margin-bottom: 30px;
    border: 1px solid rgba(148, 163, 184, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.playlist-container h2 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #ffffff;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.playlist {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
}

.playlist-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background: rgba(15, 23, 42, 0.5);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 3px solid transparent;
    border: 1px solid rgba(148, 163, 184, 0.1);
    backdrop-filter: blur(8px);
}

.playlist-item:hover {
    background: rgba(30, 41, 59, 0.7);
    transform: translateX(4px) translateY(-2px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.2);
}

.playlist-item.active {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(6, 182, 212, 0.1) 100%);
    border-left-color: #3b82f6;
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.25);
}

.item-title {
    font-size: 14px;
    font-weight: 500;
    flex: 1;
    color: #e2e8f0;
}

.item-duration {
    font-size: 12px;
    color: rgba(148, 163, 184, 0.7);
    margin-left: 12px;
    font-weight: 500;
}

/* 设置容器 */
.settings-container {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 28px;
    border: 1px solid rgba(148, 163, 184, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.settings-container h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #ffffff;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.settings-group {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.settings-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    user-select: none;
    color: #e2e8f0;
    transition: all 0.2s ease;
}

.settings-group label:hover {
    color: #ffffff;
}

.settings-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #3b82f6;
    transition: all 0.2s ease;
}

.settings-group input[type="checkbox"]:hover {
    transform: scale(1.1);
}

/* 手机端适配 */
@media (max-width: 768px) {
    .container {
        padding: 20px 12px;
    }
    
    .player-wrapper {
        margin-bottom: 24px;
        border-radius: 12px;
    }
    
    .player-controls {
        padding: 30px 12px 12px 12px;
    }
    
    .controls-bottom {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .time-display {
        font-size: 12px;
        min-width: 60px;
    }
    
    .volume-control {
        order: 10;
        width: 100%;
    }
    
    .volume-slider {
        width: 100%;
    }
    
    .icon {
        width: 20px;
        height: 20px;
    }
    
    .playlist {
        grid-template-columns: 1fr;
    }
    
    .playlist-container,
    .settings-container {
        padding: 20px;
        border-radius: 12px;
    }
    
    .playlist-container h2,
    .settings-container h3 {
        font-size: 16px;
        margin-bottom: 16px;
    }
    
    .settings-group {
        flex-direction: column;
        gap: 14px;
    }
}

/* 小屏幕手机适配 */
@media (max-width: 480px) {
    .player-wrapper {
        aspect-ratio: auto;
        height: 240px;
        border-radius: 10px;
    }
    
    .player-controls {
        padding: 20px 8px 8px 8px;
    }
    
    .progress-bar-container {
        margin-bottom: 10px;
        padding: 0 2px;
    }
    
    .control-btn {
        padding: 6px;
    }
    
    .icon {
        width: 18px;
        height: 18px;
    }
    
    .time-display {
        font-size: 11px;
        min-width: 50px;
    }
    
    .playlist-container,
    .settings-container {
        padding: 16px;
        border-radius: 10px;
    }
    
    .playlist-container h2,
    .settings-container h3 {
        font-size: 14px;
        margin-bottom: 12px;
    }
    
    .playlist {
        gap: 10px;
    }
}

/* 全屏样式 */
.player-wrapper:fullscreen {
    aspect-ratio: auto;
}

.player-wrapper:fullscreen .video-player {
    width: 100%;
    height: 100%;
}

/* 深色模式（已默认应用） */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    }
}

/* 亮色模式支持 */
@media (prefers-color-scheme: light) {
    body {
        background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #f8fafc 100%);
        color: #1e293b;
    }
    
    .page-header h1 {
        background: linear-gradient(135deg, #0284c7 0%, #0891b2 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    
    .subtitle {
        color: rgba(30, 41, 59, 0.7);
    }
    
    .player-wrapper {
        background: linear-gradient(135deg, #e2e8f0 0%, #f1f5f9 100%);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1),
                    0 0 1px rgba(0, 0, 0, 0.05) inset;
        border-color: rgba(71, 85, 105, 0.1);
    }
    
    .player-controls {
        background: linear-gradient(to top,
            rgba(241, 245, 249, 0.95) 0%,
            rgba(226, 232, 240, 0.85) 50%,
            transparent 100%);
        border-top-color: rgba(71, 85, 105, 0.1);
    }
    
    .progress-bar {
        background-color: rgba(71, 85, 105, 0.2);
    }
    
    .control-btn {
        background: rgba(71, 85, 105, 0.1);
        border-color: rgba(71, 85, 105, 0.2);
        color: #334155;
    }
    
    .control-btn:hover {
        background: rgba(59, 130, 246, 0.15);
        border-color: rgba(59, 130, 246, 0.3);
        color: #1e293b;
    }
    
    .time-display {
        color: rgba(30, 41, 59, 0.8);
    }
    
    .playlist-container,
    .settings-container {
        background: rgba(226, 232, 240, 0.6);
        border-color: rgba(71, 85, 105, 0.1);
    }
    
    .playlist-item {
        background: rgba(241, 245, 249, 0.5);
        border-color: rgba(71, 85, 105, 0.1);
        color: #334155;
    }
    
    .item-title {
        color: #1e293b;
    }
    
    .item-duration {
        color: rgba(71, 85, 105, 0.7);
    }
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.playlist-container,
.settings-container {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}