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

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: #fff;
    min-height: 100vh;
    padding-bottom: 0;
}

/* 顶部区域 */
.header {
    background-color: #fff;
    padding: 6px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    width: 100%;
    margin: 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin: 0;
    padding: 0 16px;
}

.header-left {
    flex: 1;
    display: flex;
    align-items: center;
}

.header-right {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.header-slogan {
    font-size: 22px;
    color: #333;
    font-weight: 700;
    white-space: nowrap;
}

.register-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 18px;
    border-radius: 999px;
    background: #2ECC71;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.header-title-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.header-icon {
    height: auto;
    max-height: 54px;
    width: auto;
    border-radius: 0;
    flex-shrink: 0;
    display: block;
    object-fit: contain;
    box-shadow: none;
}

.header-brand-name {
    margin-left: 12px;
    font-size: 22px;
    font-weight: 700;
    color: #333;
    white-space: nowrap;
}

.header-text-wrapper {
    display: flex;
    flex-direction: column;
}

.title {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    margin: 0 0 4px 0;
}

.description {
    font-size: 14px;
    color: #666;
    margin: 0;
}

.download-btn {
    background-color: #FFD700;
    color: #333;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    white-space: nowrap;
}

.download-btn:hover {
    background-color: #FFC700;
}

.download-btn:active {
    background-color: #FFB700;
    transform: scale(1.1);
}

/* 头部展示图 */
.header-image-section {
    padding: 0;
    max-width: 100%;
    margin: 0;
    line-height: 0;
    font-size: 0;
    width: 100%;
    display: block;
}

.header-image-first-wrap {
    position: relative;
    display: block;
    line-height: 0;
    font-size: 0;
}

.header-image-first-wrap > .header-image {
    display: block;
    width: 100%;
    height: auto;
}

.header-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 0;
    box-shadow: none;
    background-color: transparent;
    margin: 0;
    padding: 0;
    vertical-align: top;
    border: none;
    outline: none;
}

.header-image:last-child {
    margin-bottom: 0;
}

/* 轮播图区域 */
.carousel-section {
    padding: 20px 16px;
    max-width: 1200px;
    margin: 0 auto;
}

.carousel-container {
    width: 100%;
    overflow: hidden;
    border-radius: 8px;
    background-color: #fff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

.carousel-wrapper {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.carousel-image {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: auto;
    max-width: 100%;
    object-fit: contain;
    border-radius: 8px;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
    display: block;
}

.carousel-image.active {
    opacity: 1;
}

.carousel-description {
    text-align: center;
    color: #666;
    font-size: 14px;
    margin-top: 20px;
    line-height: 1.6;
    padding: 0 16px;
}

/* 底部版权信息 */
.footer {
    display: none;
}

.copyright {
    margin: 0;
}

/* 立即下载按钮（叠在图片1上，带轻微缩放动效） */
@keyframes download-btn-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.download-btn-wrapper {
    position: absolute;
    left: 50%;
    bottom: 18%;
    transform: translateX(-50%);
    text-align: center;
    padding: 0 16px;
    z-index: 10;
}

.card-download-btn {
    min-width: 280px;
    padding: 14px 48px;
    background: #fff;
    color: #000;
    border: none;
    border-radius: 999px;
    font-size: 24px;
    font-weight: 600;
    cursor: pointer;
    transition: box-shadow 0.3s, filter 0.3s;
    white-space: nowrap;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2), 0 2px 8px rgba(0, 0, 0, 0.1);
    animation: download-btn-pulse 2s ease-in-out infinite;
}

.card-download-btn:hover {
    filter: brightness(1.08);
    transform: scale(1.08);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25), 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card-download-btn:active {
    filter: brightness(0.92);
    transform: scale(0.98);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

/* 客服悬浮按钮 */
.floating-service-btn {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
    transition: all 0.3s;
    z-index: 1000;
    box-shadow: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-btn-img {
    width: 100px;
    height: 100px;
    display: block;
    object-fit: contain;
    max-width: 100%;
    max-height: 100%;
}

.floating-service-btn:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: none;
}

.floating-service-btn:active {
    transform: translateY(-50%) scale(0.95);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-image-section,
    .carousel-section {
        padding: 0;
    }

    .header-brand-name {
        font-size: 18px;
        margin-left: 10px;
    }

    .header-slogan {
        font-size: 18px;
        white-space: nowrap;
    }

    .download-btn-wrapper {
        padding: 20px 16px;
    }
    
    .card-download-btn {
        font-size: 22px;
        min-width: 240px;
        padding: 12px 40px;
    }
    
    .floating-service-btn {
        right: 16px;
    }
    
    .service-btn-img {
        width: 80px;
        height: 80px;
    }
}

@media (max-width: 480px) {
    body {
        padding-bottom: 0px;
    }

    .header-brand-name {
        font-size: 16px;
        margin-left: 8px;
    }

    .header-slogan {
        font-size: 15px;
        white-space: nowrap;
    }

    .title {
        font-size: 20px;
    }

    .description {
        font-size: 13px;
    }

    .download-btn-wrapper {
        padding: 16px 12px;
    }
    
    .card-download-btn {
        padding: 12px 36px;
        font-size: 21px;
        min-width: 220px;
    }
    
    .floating-service-btn {
        right: 12px;
    }
    
    .service-btn-img {
        width: 70px;
        height: 70px;
    }
}