* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            /* 全站统一背景 */
            background: url(../image/chao.jpg) center top/cover no-repeat;
            background-attachment: fixed;
            padding-top: 70px;
            color: #333;
        }
        /* ========== 顶部全局导航（全站统一） ========== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            padding: 15px 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            z-index: 999;
        }

        .logo {
            color: #f9e79f;
            font-size: 4.2rem;
            font-family: "华文行楷", "书法体", serif;
            letter-spacing: 3px;
        }

        /* 导航菜单基础样式 */
        nav {
            position: relative;
        }

        nav > ul {
            list-style: none;
            display: flex;
            gap: 35px;
        }

        nav > ul > li {
            position: relative;
        }

        nav > ul > li > a {
            color: #f9e79f;
            text-decoration: none;
            font-size: 1.5rem;
            transition: 0.3s;
            padding: 8px 0;
            display: block;
            font-family: "华文行楷", "书法体", serif;
        }

        nav > ul > li > a:hover {
            color: #d4af37;
        }

        /* 下拉菜单 */
        .dropdown {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(255,255,255,0.95);
            list-style: none;
            min-width: 180px;
            display: none;
            border-radius: 12px;
            padding: 15px 0;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .dropdown li a {
            display: block;
            padding: 12px 20px;
            color: #8B1A1A;
            font-size: 1.3rem;
            text-decoration: none;
            text-align: center;
            font-weight: bold;
            transition: 0.3s;
            font-family: "华文行楷", "书法体", serif;
        }

        .dropdown li a:hover {
            background: #a8201a;
            color: #fff;
        }

        nav > ul > li:hover .dropdown {
            display: block;
        }
        /* ========== 整体主容器：左导航 + 右内容 ========== */
        .main-container {
            display: flex;
            max-width: 1400px;
            margin: 60px auto;
            padding: 0 3%;
            gap: 40px;
        }

        /* 左侧竖向导航栏【独立戏曲风格】 */
        .left-sider {
            width: 220px;
            flex-shrink: 0;
            background: #fff;
            border: 1px solid #D4AF37;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0,0,0.1);
            overflow: hidden;
            position: sticky;
            top: 100px;
            height: fit-content;
        }
        .sider-title {
            background: #a8201a;
            color: #D4AF37;
            text-align: center;
            padding: 20px;
            font-size: 1.4rem;
            font-family: "华文行楷", serif;
            border-bottom: 2px solid #D4AF37;
        }
        .sider-item {
            padding: 20px 15px;
            text-align: center;
            cursor: pointer;
            font-size: 1.1rem;
            color: #555;
            transition: 0.3s;
            border-bottom: 1px solid #eee;
        }
        .sider-item:hover {
            background: rgba(168, 32, 26, 0.1);
            color: #a8201a;
        }
        .sider-item.active {
            background: #a8201a;
            color: #fff;
        }

        /* 中央内容区域 */
        .content-wrap {
            flex: 1;
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0.1);
            padding: 40px;
            border: 1px solid #e0d0b8;
        }
        /* 大标题 */
        .content-title {
            font-size: 2.6rem;
            color: #a8201a;
            font-family: "华文行楷", serif;
            text-align: center;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 2px double #D4AF37;
        }
        /* 通栏大图 */
        .banner-img {
            width: 100%;
            height: 420px;
            border-radius: 8px;
            border: 2px dashed #D4AF37;
            background: #f9f4e8;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #777;
            margin-bottom: 35px;
        }
        /* 正文段落 */
        .main-text {
            font-size: 1.1rem;
            line-height: 2.1;
            color: #444;
            text-indent: 2em;
            margin-bottom: 30px;
        }
        /* 特色标签组 */
        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 40px;
        }
        .tag {
            padding: 8px 20px;
            background: rgba(168, 32, 26, 0.12);
            color: #a8201a;
            border-radius: 20px;
            font-size: 0.98rem;
            border: 1px solid #D4AF37;
        }
        /* 补充介绍区块 */
        .sub-content {
            padding: 25px;
            background: rgba(247, 243, 232, 0.6);
            border-radius: 8px;
            border-left: 5px solid #a8201a;
            margin-bottom: 30px;
        }
        .sub-title {
            font-size: 1.5rem;
            color: #a8201a;
            margin-bottom: 15px;
            font-family: "华文行楷", serif;
        }
        .sub-text {
            font-size: 1rem;
            line-height: 2;
            color: #444;
            text-indent: 2em;
        }
        /*视频板块*/
        .video-section {
            padding: 25px;
            background: rgba(247, 243, 232, 0.6);
            border-radius: 8px;
            border-left: 5px solid #a8201a;
        }
        .video-box {
            width: 100%;
            height: 360px;
            border-radius: 8px;
            border: 2px dashed #D4AF37;
            background: #f9f4e8;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #777;
        }
        video {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 8px;
        }
        /* 返回首页按钮 */
        .back-btn {
            display: block;
            width: 160px;
            margin: 40px auto 0;
            padding: 12px;
            text-align: center;
            background: #a8201a;
            color: #fff;
            text-decoration: none;
            border-radius: 30px;
            font-family: "华文行楷", serif;
            transition: 0.3s;
        }
        .back-btn:hover {
            background: #871714;
            transform: translateY(-3px);
        }

        /* 页脚 */
        footer {
            text-align: center;
            padding: 30px;
            background: #EAE2D5;
            color: #BFA07A;
            font-family: "华文行楷", "书法体", serif;
            font-size: 9px;
            margin-top: 50px;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .main-container {
                flex-direction: column;
            }
            .left-sider {
                width: 100%;
                position: static;
            }
            .banner-img {
                height: 260px;
            }
            .content-title {
                font-size: 2rem;
            }
            .nav-menu { gap: 15px; }
            .nav-menu li a { font-size: 0.9rem; }
            .logo-text { font-size: 1.2rem; }
            .logo-img { width: 36px; height: 36px; }
        }