/* --- 1. 核心变量与基础设定 --- */
        :root {
            --brand-color: #10b981; /* 翡翠绿 */
            --brand-dark: #059669;
            --text-main: #1f2937;
            --text-sub: #6b7280;
            --text-light: #9ca3af;
            --bg-body: #f3f4f6;
            --card-bg: #ffffff;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --radius-md: 12px;
            --radius-lg: 16px;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; outline: none; }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-body);
            background-image: radial-gradient(#e5e7eb 1px, transparent 1px);
            background-size: 24px 24px;
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
        ul { list-style: none; }
        img { max-width: 100%; display: block; }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* --- 2. 导航栏 --- */
/* --- 导航栏样式 --- */
        header {
            background: #000000a3;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            height: 70px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            backdrop-filter: blur(10px);
        }
        
        .nav-wrapper { 
            display: flex; 
            justify-content: space-between; 
            align-items: center; 
            width: 100%; 
        }
        
        .logo { 
            color: #fff; 
            font-weight: 800; 
            font-size: 22px; 
            display: flex; 
            align-items: center;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .logo:hover {
            opacity: 0.9;
            transform: translateX(2px);
        }
        
        .logo-icon { 
            width: 36px; 
            height: 36px; 
            background: linear-gradient(135deg, var(--brand-color), #3b82f6); 
            border-radius: 10px; 
            margin-right: 12px; 
            display: flex; 
            align-items: center; 
            justify-content: center; 
            color: #fff; 
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
            transition: all 0.3s ease;
        }
        
        .logo:hover .logo-icon {
            transform: rotate(15deg);
            box-shadow: 0 6px 16px rgba(16, 185, 129, 0.6);
        }
        
        .nav-links { 
            display: flex; 
            gap: 6px;
            padding: 6px;
            border-radius: 12px;
        }
        
        .nav-links a { 
            color: white; 
            padding: 10px 20px; 
            font-size: 14px; 
            font-weight: 500; 
            border-radius: 8px;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
        }
        
        .nav-links a::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--brand-color);
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }
        
        .nav-links a:hover { 
            color: #fff; 
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-1px);
        }
        
        .nav-links a:hover::before {
            width: 60%;
        }
        
        .nav-links a.active { 
            background: linear-gradient(135deg, var(--brand-color), var(--brand-dark)); 
            color: #fff; 
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
            font-weight: 600;
        }
        
        .nav-links a.active::before {
            width: 0;
        }
        
        /* 移动端适配 */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
        }

        /* --- 3. 视频区域 --- */
        .cinema-wrapper {
            margin-top: 30px;
            margin-bottom: 40px;
        }

        .video-frame {
            background: #000;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
            aspect-ratio: 16/9;
        }

        .video-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.9;
        }
        
        .play-trigger {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 80px;
            height: 80px;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.4);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
        }
        .play-trigger:hover {
            transform: translate(-50%, -50%) scale(1.1);
            background: rgba(255, 255, 255, 0.3);
        }
        .play-icon {
            width: 0; height: 0;
            border-top: 14px solid transparent;
            border-bottom: 14px solid transparent;
            border-left: 24px solid #fff;
            margin-left: 4px;
        }

        .video-meta-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            padding: 30px;
            background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
            color: #fff;
            pointer-events: none;
        }
        .video-meta-overlay h1 {
            font-size: 24px;
            font-weight: 700;
            margin-left: 100px;
            margin-bottom: 12px;
        }
        .video-tags {
            display: flex;
            gap: 10px;
            font-size: 13px;
            opacity: 0.9;
        }
        .tag {
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(4px);
            padding: 2px 8px;
            border-radius: 4px;
        }

        /* --- 4. 内容布局 (严格对齐) --- */
        .content-grid {
            display: grid;
            grid-template-columns: 340px 1fr; /* 左侧固定，右侧自适应 */
            gap: 30px;
            align-items: start; /* 关键：顶部对齐，防止短列被拉伸 */
            margin-bottom: 60px;
        }

        /* 通用板块容器 */
        .section-box {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0,0,0,0.02);
            height: 100%; /* 确保背景填满 */
        }

        /* 统一标题样式 */
        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 1px solid #f3f4f6;
        }
        .section-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            align-items: center;
        }
        /* 标题前的绿色竖线 */
        .section-title::before {
            content: '';
            display: block;
            width: 4px;
            height: 18px;
            background: var(--brand-color);
            border-radius: 2px;
            margin-right: 10px;
        }
        .more-link {
            font-size: 13px;
            color: var(--text-sub);
        }
        .more-link:hover { color: var(--brand-color); }

        /* 左侧：列表样式 */
        .hot-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .hot-item {
            display: flex;
            gap: 12px;
            cursor: pointer;
            group: hover;
        }
        .hot-thumb {
            width: 100px;
            height: 68px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            position: relative;
        }
        .hot-thumb img {
            width: 100%; height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .hot-item:hover .hot-thumb img { transform: scale(1.1); }
        
        .hot-info {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 2px 0;
        }
        .hot-title {
            font-size: 14px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-main);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .hot-date {
            font-size: 12px;
            color: var(--text-light);
            background: #f9fafb;
            padding: 2px 6px;
            border-radius: 4px;
            width: fit-content;
        }

        /* 右侧：网格样式 */
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }

        .rec-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            cursor: pointer;
            border: 1px solid #f3f4f6;
            display: flex;
            flex-direction: column;
        }
        .rec-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        
        .rec-thumb {
            width: 100%;
            height: 160px;
            position: relative;
            overflow: hidden;
            background: #eee;
        }
        .rec-thumb img {
            width: 100%; height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .rec-card:hover .rec-thumb img { transform: scale(1.08); }
        
        .rec-duration {
            position: absolute;
            bottom: 10px;
            right: 10px;
            background: rgba(0,0,0,0.75);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: 4px;
        }

        .rec-body {
            padding: 16px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .rec-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .rec-meta {
            font-size: 12px;
            color: var(--text-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: auto;
        }
        .rec-author {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .avatar {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #e5e7eb;
        }

        /* --- 5. 底部 Footer --- */
        footer {
            background: #111827;
            color: #9ca3af;
            padding: 80px 0 40px;
            margin-top: 60px;
            font-size: 13px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 60px;
            margin-bottom: 60px;
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 20px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-col h4 {
            color: #fff;
            margin-bottom: 24px;
            font-size: 14px;
            font-weight: 600;
        }
        .footer-col ul li { margin-bottom: 14px; }
        .footer-col ul li a:hover { color: var(--brand-color); padding-left: 4px; }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #374151;
            color: #6b7280;
        }

        /* 响应式 */
        @media (max-width: 900px) {
            .content-grid { grid-template-columns: 1fr; }
            .nav-links { display: none; }
        }