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

        body {
            background: #fef7e8;
            font-family: 'Comic Neue', 'Comic Sans MS', 'Chalkboard SE', 'Segoe UI Emoji', system-ui, sans-serif;
            padding: 1rem;
            line-height: 1.5;
        }

        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            background: #fffef9;
            border-radius: 2rem;
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.05);
            overflow: hidden;
            padding: 1.2rem 1.5rem;
        }

        /* 顶部导航 */
        .top-nav {
            text-align: center;
            background: #fff7ef;
            border-radius: 60px;
            padding: 12px 8px;
            margin-bottom: 2rem;
            border: 1px solid #ffe0bb;
        }
        .top-nav a {
            color: #bd7a44;
            text-decoration: none;
            font-weight: bold;
            margin: 0 10px;
            font-size: 1rem;
            display: inline-block;
            transition: 0.2s;
        }
        .top-nav a:hover {
            color: #9b5a2e;
            text-decoration: underline;
        }

        /* 两栏内容区 (左音频 + 右图片) */
        .two-columns {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 1.5rem 0;
        }
        .left-audio {
            flex: 1;
            min-width: 240px;
            background: #fffcf5;
            border-radius: 1.8rem;
            padding: 1.5rem;
            text-align: center;
            border: 1px solid #ffe6cc;
        }
        .left-audio p {
            font-size: 1.1rem;
            color: #c1723a;
            margin-bottom: 1rem;
        }
        audio {
            width: 100%;
            max-width: 320px;
            border-radius: 40px;
            outline: none;
            background: #ffe8d4;
        }
        .audio-note {
            margin-top: 1rem;
            font-size: 0.85rem;
            color: #a86a3c;
        }
        .right-image {
            flex: 1;
            min-width: 240px;
            background: #fffaf2;
            border-radius: 1.8rem;
            padding: 1rem;
            text-align: center;
            border: 1px solid #ffe6cc;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .right-image img {
            max-width: 100%;
            max-height: 300px;
            object-fit: contain;
            border-radius: 1.2rem;
            box-shadow: 0 6px 12px rgba(0,0,0,0.1);
        }

        /* 字母导航条 (A-Z) */
        .alphabet-nav {
            text-align: center;
            padding: 1rem;
            background: #fffaf2;
            border-radius: 1.5rem;
            margin: 1rem 0;
        }
        .alphabet-nav a {
            display: inline-block;
            background: #ffefdd;
            color: #c47a44;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.2rem;
            width: 2.2rem;
            margin: 4px 2px;
            padding: 4px 0;
            border-radius: 40px;
            transition: 0.2s;
        }
        .alphabet-nav a:hover {
            background: #ffddb0;
            transform: scale(1.05);
        }

        /* 底部链接 */
        .bottom-links {
            text-align: center;
            margin-top: 1.5rem;
            padding-top: 1rem;
            border-top: 2px solid #ffe0bb;
            font-size: 0.85rem;
        }
        .bottom-links a {
            color: #bc7a48;
            text-decoration: none;
            margin: 0 12px;
        }
        .bottom-links a:hover {
            text-decoration: underline;
        }

        @media (max-width: 700px) {
            .top-nav a {
                margin: 0 6px;
                font-size: 0.8rem;
            }
            .alphabet-nav a {
                font-size: 1rem;
                width: 1.8rem;
            }
            .two-columns {
                flex-direction: column;
            }
        }