* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", sans-serif;
        }
        body {
            background-color: #f5f7fa;
            padding: 30px 15px;
        }
        .container {
            max-width: 1000px;
            margin: 0 auto;
            display: flex;
            gap: 25px;
        }

        /* 左右布局响应式 */
        @media (max-width: 768px) {
            .container {
                flex-direction: column;
            }
        }

        /* 左侧：投稿须知 */
        .left {
            width: 320px;
            flex-shrink: 0;
        }
        .notice-box {
            background: #fff;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.06);
            position: sticky;
            top: 30px;
        }
        .notice-box h3 {
            color: #ff6b6b;
            margin-bottom: 15px;
            font-size: 18px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .notice-box ul {
            padding-left: 20px;
            color: #555;
            line-height: 1.8;
            font-size: 14px;
        }
        .notice-box li {
            margin-bottom: 8px;
        }

        /* 右侧：表单 */
        .right {
            flex: 1;
            background: #fff;
            padding: 35px;
            border-radius: 12px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.06);
        }
        .right h2 {
            text-align: center;
            color: #333;
            margin-bottom: 25px;
            font-size: 24px;
        }

        .form-item {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            color: #444;
            font-weight: 500;
        }
        input, textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 15px;
            outline: none;
            transition: border 0.3s;
        }
        input:focus, textarea:focus {
            border-color: #268df7;
        }
        textarea {
            resize: vertical;
            min-height: 100px;
        }
        .tip {
            font-size: 13px;
            color: #666;
            margin-top: 5px;
        }
        .tip a {
            color: #268df7;
            text-decoration: none;
        }
        .submit-btn {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #59c3fb, #268df7);
            color: #fff;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            cursor: pointer;
            transition: opacity 0.3s;
        }
        .submit-btn:hover {
            opacity: 0.9;
        }
        #msg {
            text-align: center;
            margin-top: 15px;
            font-size: 15px;
            color: #268df7;
        }