/* ================= 基础重置与变量 ================= */
        :root {
            --theme-red: #c41e26;
            --theme-gold: #ffd700;
            --text-dark: #333;
            --text-gray: #666;
            --bg-white: #ffffff;
            --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: "Microsoft YaHei", sans-serif; background-color: var(--bg-white); color: var(--text-dark); line-height: 1.6; overflow-x: hidden; }
        a { text-decoration: none; color: inherit; transition: color var(--transition); }
        ul { list-style: none; }
        img { display: block; max-width: 100%; object-fit: cover; }

        .w1200 { width: 1200px; margin: 0 auto; position: relative; }

        /* ================= 1. 顶部栏 ================= */
        .top-bar-fluid { width: 100%; background-color: #fafafa; border-bottom: 1px solid #eee; }
        .top-bar { display: flex; justify-content: space-between; padding: 8px 0; font-size: 12px; color: var(--text-gray); }
        .top-right-info span { margin-left: 12px; }

        /* ================= 2. 头部 (LOGO/搜索框/日期) ================= */
        .header { display: flex; justify-content: space-between; align-items: center; padding: 25px 0; }
        .logo-box { width: 300px; }
        .logo-box a { display: block; }

        .search-wrapper { display: flex; flex-direction: column; align-items: center; gap: 8px; }
        .search-box { 
            display: flex; border: 1px solid #ddd; border-radius: 30px; 
            width: 420px; height: 44px; background: #fff; transition: all var(--transition); overflow: hidden;
        }
        .search-box:focus-within { border-color: var(--theme-red) !important; box-shadow: 0 0 10px rgba(196, 30, 38, 0.2); }
        .search-box input { flex: 1; border: none; outline: none; padding: 0 25px; font-size: 14px; }
        .search-box button { background: #fff; border: none; border-left: 1px solid #eee; padding: 0 20px; cursor: pointer; color: var(--text-gray); }
        
        .date-info-text { font-size: 12px; color: #999; }
        .header-ad { width: 350px; height: 75px; overflow: hidden; border-radius: 4px; }

        /* ================= 3. 导航栏 (白色竖线间隔 + 金黄触显) ================= */
        .nav-fluid { 
            width: 100%; background: url('images/index_2023_pic30.png') repeat-x center center; 
            box-shadow: 0 4px 12px rgba(0,0,0,0.08); position: sticky; top: 0; z-index: 999; height: 50px; 
        }
        .nav { display: flex; justify-content: flex-start; align-items: center; height: 100%; }
        .nav a { 
            color: var(--theme-red); font-size: 16px; font-weight: bold; 
            padding: 0 18px; height: 100%; display: flex; align-items: center; 
            position: relative; transition: color 0.2s;
        }
        .nav a:first-child { padding-left: 0; }
        .nav a::after { content: ""; position: absolute; right: 0; top: 50%; transform: translateY(-50%); width: 1px; height: 14px; background-color: #fff; opacity: 1; }
        .nav a:last-child::after { display: none; }
        .nav a:hover { color: var(--theme-gold); }

        /* ================= 4. 内容与横幅广告 ================= */
        .deco-line { flex: 1; height: 12px; background: url('images/index_2023_pic09.png') repeat-x left center; }
        
        /* 广告悬停微放大 */
        .wide-banner { width: 100%; height: 120px; margin-bottom: 15px; overflow: hidden; border-radius: 4px; cursor: pointer; }
        .wide-banner img { width: 100%; height: 100%; transition: transform 0.4s ease; object-fit: cover; }
        .wide-banner:hover img { transform: scale(1.02); }

        .news-section { display: flex; gap: 30px; padding: 20px 0 30px; }
        .news-col { flex: 1; overflow: hidden; }
        .news-col-header { display: flex; align-items: flex-end; margin-bottom: 15px; }
        
        /* ★ 核心修复：各板块大标题增加超链接触显（颜色变金黄） ★ */
        .news-col-header h3 { 
            color: var(--theme-red); 
            font-size: 18px; 
            font-weight: bold; 
            margin-right: 15px; 
            white-space: nowrap; 
            cursor: pointer; 
            transition: color 0.2s ease; /* 增加平滑色彩过渡 */
        }
        .news-col-header h3:hover { 
            color: var(--theme-gold); /* 触显变为金黄 */
        }
        .news-col-header .deco-line { margin-bottom: 6px; }

        .img-card { position: relative; overflow: hidden; border-radius: 6px; cursor: pointer; height: 150px; margin-bottom: 15px; box-shadow: 0 3px 10px rgba(0,0,0,0.06); }
        .img-card img { width: 100%; height: 100%; transition: transform 0.5s ease; }
        .img-card-title { position: absolute; bottom: 0; left: 0; width: 100%; background: rgba(0, 0, 0, 0.65); color: #ffffff; font-size: 12px; padding: 8px 10px; text-align: center; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; backdrop-filter: blur(2px); transition: background 0.3s; }
        .img-card:hover img { transform: scale(1.05); }

        .news-list li { font-size: 13px; line-height: 2.4; color: var(--text-dark); position: relative; padding-left: 12px; cursor: pointer; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: color 0.2s; }
        .news-list li::before { content: ""; position: absolute; left: 0; top: 14px; width: 4px; height: 4px; background-color: #999; border-radius: 50%; }
        .news-list li:hover { color: var(--theme-red); }

        /* ================= 5. 美图区 (滑块) ================= */
        .gallery { padding: 20px 0; position: relative; }
        .slider-viewport { overflow: hidden; width: 100%; }
        .portrait-row { display: flex; gap: 15px; transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1); width: max-content; }
        .portrait-row .img-card { width: calc((1200px - 75px) / 6); height: 260px; flex-shrink: 0; margin-bottom: 0; }
        .slide-btn { position: absolute; top: 60%; transform: translateY(-50%); width: 44px; height: 44px; border-radius: 50%; background: rgba(255, 255, 255, 0.95); border: 1px solid #eee; color: var(--theme-red); font-size: 20px; display: flex; align-items: center; justify-content: center; cursor: pointer; z-index: 10; box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
        .prev-btn { left: -22px; } .next-btn { right: -22px; }

        /* ================= 6. 现代西藏网格 (3行9列) ================= */
        .grid-gallery { padding: 20px 0 60px; }
        .grid-container { display: grid; grid-template-columns: repeat(9, 1fr); gap: 10px; grid-template-rows: repeat(3, 1fr); }
        .grid-item { aspect-ratio: 4 / 3; overflow: hidden; border-radius: 3px; cursor: pointer; }
        .grid-item img { width: 100%; height: 100%; transition: transform 0.4s ease; }
        .grid-item:hover img { transform: scale(1.1); }

        /* ================= 7. 底部 (浅灰底色 + 顶部装饰线) ================= */
        .footer-wrapper { 
            width: 100%; 
            background-color: #f4f4f4; 
            padding-bottom: 50px; 
            position: relative;
        }
        
        .footer-deco-line {
            width: 100%;
            height: 12px;
            background: url('http://www.tibet.cn/images/index_2023_pic09.png') repeat-x center;
            margin-bottom: 40px;
        }

        .footer { width: 100%; color: #333; text-align: center; }
        .footer-inner { width: 1200px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; position: relative; }
        
        .footer-links { margin-bottom: 20px; font-size: 15px; }
        .footer-links a { margin: 0 10px; color: #333; }
        .footer-links a:hover { color: var(--theme-red); text-decoration: underline; }
        
        .footer-info { font-size: 14px; color: #555; line-height: 2.2; }
        .footer-info p { margin-bottom: 6px; }
        .footer-info span { margin: 0 10px; }

        /* 回到顶部按钮（加宽尺寸避免文字换行错位） */
        .back-to-top-btn { 
            position: absolute; 
            right: 0; 
            bottom: 0px; 
            width: 64px; 
            height: 64px; 
            background: #e0e0e0; 
            color: #666; 
            display: flex; 
            flex-direction: column; 
            align-items: center; 
            justify-content: center; 
            font-size: 12px; 
            border-radius: 2px;
            cursor: pointer; 
            transition: all 0.3s;
        }
        .back-to-top-btn span:first-child { font-size: 14px; margin-bottom: 3px; }
        .back-to-top-btn:hover { background: var(--theme-red); color: #fff; }