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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            color: #1F2937;
            line-height: 1.6;
        }

        /* 顶部横幅 */
        .top-banner {
            width: 100%;
            height: 40px;
            background: #0069EA;
            padding: 0 40px;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .banner-wrapper {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .banner-content {
            display: flex;
            gap: 8px;
            align-items: center;
            cursor: pointer;
        }

        .banner-icon {
            width: 16px;
            height: 16px;
            color: #FFFFFF;
        }

        .banner-text {
            color: #FFFFFF;
            font-family: 'Inter', sans-serif;
            font-size: 14px;
            font-weight: 500;
        }

        .banner-arrow {
            width: 14px;
            height: 14px;
            color: #FFFFFF;
        }

        .banner-close {
            width: 24px;
            height: 24px;
            border-radius: 12px;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            transition: background 0.2s ease;
            flex-shrink: 0;
        }

        .banner-close:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .close-icon {
            width: 14px;
            height: 14px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* 页面内容占位 */
        .page-content {
            padding: 40px;
            text-align: center;
            color: #6B7280;
        }
    </style>