/* 公司简介区域样式 */
.about-intro {
    padding: 80px 0;
    background-color: var(--white);
    position: relative;
}

/* 品牌口号样式 */
.brand-slogan {
    text-align: center;
    margin-bottom: 60px;
    padding-bottom: 30px;
    position: relative;
}

.brand-slogan::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--color-primary);
}

.slogan-prefix {
    display: block;
    font-size: 16px;
    font-weight: 500;
    color: var(--blue-700);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 12px;
}

.brand-name {
    font-size: 48px;
    font-weight: 700;
    color: var(--black);
    line-height: 1.2;
}

.brand-highlight {
    color: var(--color-primary);
    position: relative;
}

.brand-highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: rgba(26, 95, 180, 0.1);
    z-index: -1;
}

/* 公司描述样式 */
.company-description {
    max-width: 900px;
    margin: 0 auto 80px;
}

.company-description p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: 25px;
    text-align: center;
}

/* 数据卡片容器 */
.stats-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

/* 数据卡片样式 */
.stat-card {
    background-color: var(--white);
    border-radius: 8px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--color-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-number .plus,
.stat-number .unit {
    font-size: 24px;
    font-weight: 600;
    margin-left: 2px;
    color: var(--blue-700);
}

.stat-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 15px;
    line-height: 1.4;
}

.stat-description {
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text);
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .brand-name {
        font-size: 40px;
    }
    
    .company-description p {
        font-size: 17px;
    }
}

@media (max-width: 768px) {
    .about-intro {
        padding: 60px 0;
    }
    
    .brand-slogan {
        margin-bottom: 50px;
    }
    
    .brand-name {
        font-size: 36px;
    }
    
    .company-description {
        margin-bottom: 60px;
    }
    
    .stat-card {
        padding: 30px 20px;
    }
    
    .stat-number {
        font-size: 42px;
    }
}

@media (max-width: 576px) {
    .stats-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .brand-name {
        font-size: 32px;
    }
    
    .slogan-prefix {
        font-size: 14px;
    }
    
    .company-description p {
        font-size: 16px;
        text-align: left;
    }
    
    .stat-number {
        font-size: 38px;
    }
    
    .stat-card {
        padding: 25px 20px;
    }
}

/* 视差滚动区域样式 */
.parallax-section {
    position: relative;
    height: 550px;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed; /* 关键属性：使背景固定，内容滚动时产生视差效果 */
    overflow: hidden;
    width: 100%;
}

/* 半透明覆盖层，增强文字可读性 */
.parallax-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.5) 50%, rgba(0, 0, 0, 0.2) 100%);
    display: flex;
    align-items: center;
}

/* 内容容器 */
.parallax-content {
    max-width: 650px;
    color: var(--color-text-light);
    padding: 40px;
    background-color: rgba(0, 0, 0, 0.4);
    border-radius: 8px;
    backdrop-filter: blur(2px);
}

/* 副标题样式 */
.parallax-subtitle {
    display: block;
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

/* 主标题样式 */
.parallax-title {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--color-text-light);
}

/* 描述文本样式 */
.parallax-description {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 30px;
    color: rgba(255, 255, 255, 0.9);
}

/* 特性列表容器 */
.parallax-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

/* 特性项目样式 */
.feature-item {
    display: flex;
    align-items: center;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
}

.feature-icon {
    margin-right: 10px;
    color: var(--color-primary);
    flex-shrink: 0;
}

/* 按钮样式 */
.parallax-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 200px;
    height: 52px;
    background-color: var(--color-primary);
    border: solid 1px var(--color-primary);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-light);
    text-align: center;
    line-height: 1;
    border-radius: 4px;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
}

.parallax-button:hover {
    background-color: var(--blue-700);
    border: solid 1px var(--blue-700);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 95, 180, 0.3);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .parallax-section {
        height: 500px;
        background-attachment: scroll; /* 移动端取消固定背景以改善性能 */
    }
    
    .parallax-content {
        padding: 30px 20px;
        max-width: 100%;
        margin: 0 15px;
    }
    
    .parallax-title {
        font-size: 28px;
    }
    
    .parallax-features {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .parallax-button {
        min-width: 100%;
    }
}

/* 平板设备适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .parallax-content {
        max-width: 80%;
    }
    
    .parallax-title {
        font-size: 32px;
    }
}
/* 证书展示区域样式 */
.certificates-section {
    padding: 80px 0;
    background-color: var(--white);
}

/* 标题区域 */
.certificates-header {
    text-align: center;
    margin-bottom: 30px;
}

.certificates-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 15px;
    line-height: 1.2;
}

/* 简介区域 */
.certificates-intro {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.certificates-intro p {
    font-size: 18px;
    line-height: 1.7;
    color: var(--color-text-dark);
    margin-bottom: 0;
}

/* 证书图片展示区域 */
.certificates-gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    margin-bottom: 50px;
}

.certificate-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 180px;
    transition: transform 0.3s ease;
}

.certificate-item:hover {
    transform: translateY(-5px);
}

.certificate-image-wrapper {
    width: 150px;
    height: 206px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    background-color: var(--white);
}

.certificate-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 15px;
    transition: opacity 0.3s ease;
}

.certificate-image-wrapper:hover img {
    opacity: 0.95;
}

.certificate-caption {
    text-align: center;
}

.certificate-caption h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 8px;
}

.certificate-caption p {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.4;
    margin-bottom: 0;
}

/* 底部附加信息 */
.certificates-footer {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #e9ecef;
}

.certificates-footer p {
    font-size: 16px;
    color: var(--gray-500);
    line-height: 1.6;
    margin-bottom: 0;
}

/* 移动端适配 */
@media (max-width: 992px) {
    .certificates-section {
        padding: 60px 0;
    }
    
    .certificates-title {
        font-size: 32px;
    }
    
    .certificates-intro p {
        font-size: 17px;
    }
    
    .certificates-gallery {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .certificates-section {
        padding: 50px 0;
    }
    
    .certificates-title {
        font-size: 28px;
    }
    
    .certificates-intro {
        margin-bottom: 40px;
    }
    
    .certificates-intro p {
        font-size: 16px;
    }
    
    .certificates-gallery {
        gap: 25px;
        margin-bottom: 40px;
    }
    
    .certificate-item {
        max-width: 160px;
    }
    
    .certificate-image-wrapper {
        width: 140px;
        height: 192px;
    }
    
    .certificate-caption h4 {
        font-size: 16px;
    }
    
    .certificate-caption p {
        font-size: 13px;
    }
}

@media (max-width: 576px) {
    .certificates-gallery {
        gap: 20px;
    }
    
    .certificate-item {
        max-width: 140px;
    }
    
    .certificate-image-wrapper {
        width: 130px;
        height: 178px;
    }
}

@media (max-width: 480px) {
    .certificates-gallery {
        gap: 15px;
    }
    
    .certificate-item {
        max-width: 130px;
    }
    
    .certificate-image-wrapper {
        width: 120px;
        height: 165px;
    }
}