html, body {
    width: 100% !important;
    max-width: 100% !important;
}

.ylb-wrap {
    width: 100%;
    color: #ffffff;
    background-color: #11161f;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Microsoft YaHei, Arial, sans-serif;
}

.ylb-container {
    width: 96%;
    margin: 0 auto;
    padding: 0 16px;
}

/* 顶部导航 修复导航错位 */
.ylb-header {
    width: 100%;
    background-color: #161b26;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.ylb-nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.ylb-logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #ffffff;
}

.ylb-nav-menu {
    display: flex;
    gap: 28px;
}

    .ylb-nav-menu a {
        color: #c9cdd4;
        text-decoration: none;
        font-size: 16px;
    }

        .ylb-nav-menu a:hover {
            color: #36b4ff;
        }

/* 首屏横幅 修复图片不会缩小问题 */
.ylb-banner {
    width: 100%;
    position: relative;
    overflow: hidden;
    background-color: #11161f;
}

.ylb-banner-image {
    width: 100%;
    height: auto;
    display: block;
    max-width: 100%;
}

/* 核心功能区域 响应式网格：电脑4列，平板2列，手机1列 */
.ylb-section {
    padding: 60px 0;
}

.ylb-title {
    text-align: center;
    font-size: 32px;
    margin: 0 0 40px;
    color: #ffffff;
}

.ylb-feature-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.ylb-feature-item {
    background: #272c38;
    padding: 26px 20px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

    .ylb-feature-item h3 {
        margin-top: 0;
        color: #51b8ff;
        font-size: 22px;
    }

    .ylb-feature-item p {
        color: #aeb7c9;
        line-height: 1.6;
    }

/* 适用门店 */
.ylb-case-bg {
    background-color: #191e29;
}

.ylb-case-list {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.ylb-case-item {
    padding: 12px 28px;
    background-color: #273446;
    border-radius: 8px;
    font-size: 18px;
    color: #ffffff;
}

/* 门店区块下方下载按钮 */
.ylb-case-action {
    margin-top: 30px;
    text-align: center;
}

.ylb-case-tip {
    margin: 0 0 18px;
    color: #aeb7c9;
    font-size: 16px;
}

.ylb-case-download-btn {
    display: inline-block;
    padding: 16px 48px;
    background: linear-gradient(135deg, #2389dd, #36b4ff);
    color: #ffffff !important;
    font-size: 20px;
    font-weight: 700;
    border-radius: 8px;
    text-decoration: none;
    box-shadow: 0 0 20px rgba(35, 137, 221, 0.5);
    transition: all 0.3s ease;
}

    .ylb-case-download-btn:hover {
        background: linear-gradient(135deg, #1f7bc2, #2aa3e8);
        color: #ffffff !important;
        transform: translateY(-2px);
        box-shadow: 0 0 30px rgba(35, 137, 221, 0.7);
    }

/* 底部 SEO 关键词 */
.ylb-seo-footer {
    padding: 26px 0;
    background-color: #0e131b;
}

    .ylb-seo-footer p {
        font-size: 13px;
        color: #777777;
        text-align: center;
        margin: 0;
        line-height: 1.8;
    }

/* 平板尺寸：769~1100px，卡片2个一行 */
@media (max-width: 1100px) {
    .ylb-feature-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 手机尺寸：768px及以下，卡片1个一行，导航缩小 */
@media (max-width: 768px) {
    .ylb-nav-menu {
        gap: 12px;
    }

        .ylb-nav-menu a {
            font-size: 13px;
        }

    .ylb-title {
        font-size: 26px;
    }

    .ylb-feature-list {
        grid-template-columns: 1fr;
    }

    .ylb-banner-image {
        max-width: 100%;
        height: auto;
    }

    .ylb-case-download-btn {
        padding: 14px 32px;
        font-size: 17px;
    }
}