html, body {
            margin: 0;
            padding: 0;
            height: 100%;
        }

   
        .loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: #fff;
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.5s;
        }

        .loader.hidden {
            opacity: 0;
            pointer-events: none;
        }

        .logo {
            width: 200px;
            animation: fadeIn 1s ease-in-out;
        }

        @keyframes fadeIn {
            0% { opacity: 0; transform: scale(0.5); }
            50% { opacity: 1; transform: scale(1.1); }
            100% { opacity: 1; transform: scale(1); }
        }

       
        /* Banner 样式 - 根据导航条61px调整 */
        .banner {
            width: 100%;
       
            background: #f0f0f0;
            position: relative;
            overflow: hidden;
        }

        .banner img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .banner-text {
            position: absolute;
            top: 50%;
            left: 10%;
            transform: translateY(-50%);
            color: var(--text-color);
            text-align: left;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
            max-width: 50%;
            opacity: 0;
        }

        .banner-text.loaded {
            opacity: 1;
        }

        .banner-text h1 {
            font-size: 48px;
            margin: 0;
            animation: slideUp 1s ease-out forwards;
        }

        .banner-text .highlight {
            font-weight: bold;
            font-size: 60px;
            color: var(--highlight-color);
        }

        .banner-text p {
            font-size: 18px;
            margin: 10px 0;
            animation: slideUp 1s ease-out 0.3s forwards;
        }

        .banner-text a {
            display: inline-block;
            padding: 10px 20px;
            background: var(--highlight-color);
            color: var(--primary-color);
            text-decoration: none;
            border-radius: 5px;
            margin-top: 20px;
            transition: background 0.3s;
            animation: slideUp 1s ease-out 0.6s forwards;
        }

        .banner-text a:hover {
            background: #ffcc00;
        }

        @keyframes slideUp {
            0% { opacity: 0; transform: translateY(50px); }
            100% { opacity: 1; transform: translateY(0); }
        }

        .main-content {
            /* 无padding-top */
        }

        .content {
            padding: 20px;
            max-width: 1200px;
            margin: 0 auto;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
          

            .banner {
         
            }

            .banner-text {
                left: 5%;
                max-width: 90%;
            }

            .banner-text h1 {
                font-size: 32px;
            }

            .banner-text .highlight {
                font-size: 40px;
            }

            .banner-text p {
                font-size: 14px;
            }
          
        }