body {
            font-family: 'IBM Plex Sans', sans-serif;
            background: linear-gradient(135deg, #1c2526, #2e3839);
            color: #d9d7d2;
            margin: 0;
            overflow-x: hidden;
        }
        .navbar {
            background: rgba(20, 25, 26, 0.95);
            padding: 1.8rem 3rem;
            border-bottom: 1px solid rgba(77, 95, 96, 0.3);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
            z-index: 10;
        }
        .navbar-brand {
            font-family: 'Cinzel', serif;
            font-size: 2.4rem;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: lowercase;
            position: relative;
            transition: all 0.3s;
        }
        .navbar-brand img {
            width: 60px;
            height: 60px;
            margin-right: 20px;
            border-radius: 12px;
        }
        .navbar-brand:hover img {
            transform: scale(1.05);
        }
        .section {
            padding: 35px;
            background: rgba(26, 32, 33, 0.9);
            border-radius: 16px;
            margin: 25px 0;
            box-shadow: 0 6px 25px rgba(0, 0, 0, 0.6);
            border: 1px solid rgba(77, 95, 96, 0.3);
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
        }
        .section:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 35px rgba(0, 0, 0, 0.8);
        }
        .section-title {
            font-family: 'Cinzel', serif;
            color: #8f9ba6;
            font-size: 1.7rem;
            font-weight: 700;
            text-align: left;
            margin-bottom: 20px;
            letter-spacing: 1px;
            position: relative;
            text-shadow: 0 0 6px rgba(143, 155, 166, 0.3);
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 50px;
            height: 3px;
            bottom: -10px;
            left: 0;
            background: linear-gradient(90deg, #8f9ba6, transparent);
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .section-title:hover::after {
            width: 70px;
        }
        .description-text {
            font-size: 1.1rem;
            font-weight: 300;
            line-height: 1.6;
            color: #d9d7d2;
        }
        .download-card {
            background: rgba(44, 54, 55, 0.8);
            border: 1px solid rgba(77, 95, 96, 0.5);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            transition: all 0.3s ease;
        }
        .download-card:hover {
            background: rgba(44, 54, 55, 1);
            border-color: #8f9ba6;
            box-shadow: 0 0 15px rgba(143, 155, 166, 0.3);
            transform: translateY(-5px);
        }
        .download-card img.qr-code {
            width: 150px;
            height: 150px;
            margin: 15px auto;
            display: block;
            border-radius: 8px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
        }
        .btn-download {
            background: rgba(77, 95, 96, 0.8);
            border: 1px solid #8f9ba6;
            color: #d9d7d2;
            padding: 10px 25px;
            border-radius: 25px;
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
            text-decoration: none;
            display: inline-block;
        }
        .btn-download:hover {
            background: #8f9ba6;
            color: #1c2526;
            box-shadow: 0 0 15px rgba(143, 155, 166, 0.4);
        }
        .footer {
            background: rgba(20, 25, 26, 0.95);
            color: #b8a68f;
            padding: 40px 0;
            text-align: center;
            font-size: 1rem;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
            border-top-left-radius: 16px;
            border-top-right-radius: 16px;
            position: relative;
        }
        .footer-contact {
            display: inline-block;
            background: transparent;
            color: #8f9ba6;
            padding: 8px 25px;
            border: 1px solid #8f9ba6;
            border-radius: 25px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            margin-top: 15px;
        }
        .footer-contact:hover {
            background: #8f9ba6;
            color: #1c2526;
            box-shadow: 0 0 15px rgba(143, 155, 166, 0.4);
        }
        /* 电脑端调整 */
        @media (min-width: 992px) {
            .section {
                max-width: 1100px;
                margin-left: auto;
                margin-right: auto;
            }
        }
        /* 手机端调整 */
        @media (max-width: 991.98px) {
            .navbar {
                padding: 1.5rem 1rem;
            }
            .navbar-brand {
                font-size: 1.8rem;
            }
            .section {
                padding: 20px;
                margin: 20px 10px;
                width: calc(100% - 20px);
            }
            .section-title {
                font-size: 1.4rem;
            }
            .description-text {
                font-size: 0.95rem;
            }
            .download-card img.qr-code {
                width: 120px;
                height: 120px;
            }
            .footer {
                padding: 30px 10px;
            }
        }