:root {
            --et2-primary: #ff6600;
            --et2-secondary: #333333;
            --et2-accent: #ff9900;
            --et2-bg-light: #f8f9fa;
            --et2-text: #2c3e50;
            --et2-white: #ffffff;
            --et2-gap: 8px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--et2-text);
            line-height: 1.6;
            background-color: var(--et2-bg-light);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        /* 统一词汇表：pinyin (导航) */
        .et2-pinyin {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: calc(var(--et2-gap) * 2) 5%;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }

        .et2-logo {
            min-width: 0;
            flex: 0 0 auto;
        }

        .et2-logo img {
            height: 40px;
            display: block;
        }

        .et2-yousuo {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--et2-gap) * 4);
            min-width: 0;
        }

        .et2-yousuo a {
            font-weight: 500;
            font-size: 1.1rem;
            color: var(--et2-secondary);
            padding: var(--et2-gap);
        }

        .et2-yousuo a:hover, .et2-yousuo a.active {
            color: var(--et2-primary);
        }

        /* 统一词汇表：zongchi (容器) */
        .et2-zongchi {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 统一词汇表：zhantai (展示区) */
        .et2-zhantai {
            padding: calc(var(--et2-gap) * 12) 0;
            position: relative;
            background: #ffffff;
            overflow: hidden;
        }

        .et2-pifu {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: calc(var(--et2-gap) * 6);
        }

        .et2-wenku {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
            padding: calc(var(--et2-gap) * 2);
        }

        .et2-wenku h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            margin-bottom: calc(var(--et2-gap) * 3);
            color: var(--et2-secondary);
            word-break: keep-all;
        }

        .et2-wenku p {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: #666;
            margin-bottom: calc(var(--et2-gap) * 5);
            max-width: 600px;
        }

        .et2-cangku {
            flex: 1.2;
            min-width: 320px;
            position: relative;
        }

        .et2-cangku img {
            width: 100%;
            height: auto;
            border-radius: 24px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
            transform: perspective(1000px) rotateY(-5deg);
            transition: transform 0.5s ease;
        }

        .et2-cangku:hover img {
            transform: perspective(1000px) rotateY(0deg);
        }

        /* 统一词汇表：qiaoji (按钮) */
        .et2-qiaoji {
            display: inline-flex;
            align-items: center;
            padding: 18px 48px;
            background: var(--et2-primary);
            color: var(--et2-white);
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: bold;
            box-shadow: 0 10px 20px rgba(255, 102, 0, 0.3);
        }

        .et2-qiaoji:hover {
            background: var(--et2-accent);
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 102, 0, 0.4);
            color: white;
        }

        /* 统一词汇表：cihui (卡片) */
        .et2-jujiao {
            background: #f0f2f5;
            padding: calc(var(--et2-gap) * 10) 0;
        }

        .et2-houxuan {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: calc(var(--et2-gap) * 4);
            margin-top: calc(var(--et2-gap) * 6);
        }

        .et2-cihui {
            background: var(--et2-white);
            border-radius: 20px;
            padding: calc(var(--et2-gap) * 4);
            display: flex;
            flex-direction: column;
            gap: calc(var(--et2-gap) * 3);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            min-width: 0;
            overflow: hidden;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .et2-cihui:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .et2-cihui img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: calc(var(--et2-gap) * 2);
        }

        .et2-cihui h3 {
            font-size: 1.5rem;
            color: var(--et2-secondary);
        }

        .et2-shuru {
            color: #888;
            font-size: 0.95rem;
            margin-bottom: calc(var(--et2-gap) * 2);
        }

        .et2-qiaoji-small {
            padding: 10px 24px;
            border: 2px solid var(--et2-primary);
            color: var(--et2-primary);
            border-radius: 8px;
            font-weight: 600;
            align-self: flex-start;
        }

        .et2-qiaoji-small:hover {
            background: var(--et2-primary);
            color: white;
        }

        /* 统一词汇表：shouwei (页脚) */
        .et2-shouwei {
            background: #1a1a1a;
            color: #999;
            padding: calc(var(--et2-gap) * 10) 0;
        }

        .et2-diwen {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: calc(var(--et2-gap) * 6);
        }

        /* 复用首页导航栏风格 (强制要求) */
        .et2-cangku-footer {
            min-width: 200px;
        }

        .et2-cangku-footer h4 {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: calc(var(--et2-gap) * 3);
        }

        .et2-cangku-footer ul {
            list-style: none;
        }

        .et2-cangku-footer li {
            margin-bottom: var(--et2-gap);
        }

        .et2-cangku-footer a {
            color: #888;
        }

        .et2-cangku-footer a:hover {
            color: var(--et2-primary);
            padding-left: 5px;
        }

        .et2-brand-text {
            font-size: 1.5rem;
            font-weight: bold;
            color: #fff;
            margin-bottom: var(--et2-gap);
        }

        .et2-copyright {
            width: 100%;
            text-align: center;
            padding-top: calc(var(--et2-gap) * 6);
            border-top: 1px solid #333;
            margin-top: calc(var(--et2-gap) * 6);
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .et2-pinyin {
                flex-direction: column;
                gap: calc(var(--et2-gap) * 2);
            }
            .et2-yousuo {
                gap: calc(var(--et2-gap) * 2);
                justify-content: center;
            }
            .et2-wenku {
                text-align: center;
            }
            .et2-wenku p {
                margin: 0 auto calc(var(--et2-gap) * 5);
            }
            .et2-cangku {
                transform: none;
            }
            .et2-cangku img {
                transform: none;
            }
            .et2-houxuan {
                grid-template-columns: 1fr;
            }
        }