/* 空气净化设计页面样式 - 清新环保科技风格 */

/* 业务介绍区域 */
.business-intro {
    padding: 120px 0;
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    position: relative;
    overflow: hidden;
}

.business-intro::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -10%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(76, 175, 80, 0.1), transparent);
    border-radius: 50%;
}

.business-intro .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.business-intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.business-intro-text h2 {
    font-size: 52px;
    font-weight: 700;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
    line-height: 1.2;
}

.business-intro-text h2::after {
    content: '';
    display: block;
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, #4caf50, #66bb6a);
    margin-top: 20px;
    box-shadow: 0 2px 10px rgba(76, 175, 80, 0.3);
}

.business-intro-text p {
    font-size: 18px;
    line-height: 1.8;
    color: #2e7d32;
    margin-bottom: 20px;
}

.business-intro-image {
    position: relative;
    height: 500px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(76, 175, 80, 0.25);
    transition: transform 0.5s ease;
}

.business-intro-image:hover {
    transform: translateY(-10px);
}

.business-intro-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 项目数据统计 */
.project-stats {
    padding: 100px 0;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.project-stats::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent);
    top: -300px;
    right: -200px;
    border-radius: 50%;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.stat-number {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 10px;
    display: block;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stat-label {
    font-size: 18px;
    opacity: 0.95;
    font-weight: 500;
}

/* 核心优势区域 */
.core-advantages {
    padding: 120px 0;
    background: #ffffff;
}

.core-advantages .section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
}

.core-advantages .section-header h2 {
    font-size: 52px;
    font-weight: 700;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.core-advantages .section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, #4caf50, #66bb6a);
    border-radius: 2px;
}

.core-advantages .section-header p {
    font-size: 20px;
    color: #666;
    line-height: 1.8;
    margin-top: 30px;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.advantage-card {
    background: linear-gradient(135deg, #e8f5e9, #ffffff);
    padding: 50px 40px;
    border-radius: 20px;
    transition: all 0.4s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4caf50, #66bb6a);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.advantage-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 30px 80px rgba(76, 175, 80, 0.2);
    border-color: #4caf50;
}

.advantage-icon {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
    font-size: 40px;
    color: #ffffff;
    box-shadow: 0 10px 30px rgba(76, 175, 80, 0.3);
    transition: all 0.3s ease;
}

.advantage-card:hover .advantage-icon {
    transform: rotateY(360deg);
}

.advantage-card h3 {
    font-size: 26px;
    font-weight: 600;
    color: #2e7d32;
    margin-bottom: 15px;
}

.advantage-card p {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
}

/* 解决方案展示 */
.solution-categories {
    padding: 120px 0;
    background: linear-gradient(135deg, #1b5e20, #2e7d32);
    color: #ffffff;
}

.solution-categories .section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
}

.solution-categories .section-header h2 {
    font-size: 52px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
}

.solution-categories .section-header p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.solution-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(76, 175, 80, 0.2);
    transition: all 0.4s ease;
}

.solution-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
    border-color: #66bb6a;
    box-shadow: 0 30px 80px rgba(76, 175, 80, 0.3);
}

.solution-header {
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    padding: 40px;
    text-align: center;
}

.solution-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
}

.solution-header h3 {
    font-size: 28px;
    font-weight: 600;
    color: #ffffff;
}

.solution-body {
    padding: 40px 30px;
}

.solution-body p {
    font-size: 16px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 20px;
}

.solution-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.solution-features li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.solution-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #66bb6a;
    font-weight: 700;
    font-size: 18px;
}

/* 合作品牌 */
.partner-brands {
    padding: 120px 0;
    background: #f1f8e9;
}

.partner-brands .section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
}

.partner-brands .section-header h2 {
    font-size: 52px;
    font-weight: 700;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.partner-brands .section-header p {
    font-size: 20px;
    color: #666;
    line-height: 1.8;
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.brand-card {
    background: #ffffff;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.brand-card:hover {
    transform: translateY(-10px);
    border-color: #4caf50;
    box-shadow: 0 20px 60px rgba(76, 175, 80, 0.15);
}

.brand-icon {
    font-size: 56px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.brand-card:hover .brand-icon {
    transform: scale(1.1);
}

.brand-card h3 {
    font-size: 22px;
    font-weight: 600;
    color: #2e7d32;
    margin-bottom: 10px;
}

.brand-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 服务流程 */
.service-process {
    padding: 120px 0;
    background: #ffffff;
    position: relative;
    overflow: hidden;
}

.service-process::before {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(76, 175, 80, 0.05), transparent);
    border-radius: 50%;
}

.service-process .section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 80px;
    position: relative;
    z-index: 1;
}

.service-process .section-header h2 {
    font-size: 52px;
    font-weight: 700;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
}

.service-process .section-header p {
    font-size: 20px;
    color: #666;
    line-height: 1.8;
}

.process-timeline {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, #4caf50, #66bb6a, #4caf50);
    transform: translateX(-50%);
    box-shadow: 0 0 20px rgba(76, 175, 80, 0.3);
}

.process-item {
    display: grid;
    grid-template-columns: 1fr 80px 1fr;
    gap: 40px;
    margin-bottom: 80px;
    position: relative;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
    align-items: center;
}

.process-item:nth-child(1) { animation-delay: 0.1s; }
.process-item:nth-child(2) { animation-delay: 0.2s; }
.process-item:nth-child(3) { animation-delay: 0.3s; }
.process-item:nth-child(4) { animation-delay: 0.4s; }
.process-item:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.process-content {
    background: linear-gradient(135deg, #e8f5e9, #ffffff);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(76, 175, 80, 0.1);
    border: 2px solid transparent;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.process-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4caf50, #66bb6a);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.process-content:hover::before {
    transform: scaleX(1);
}

.process-content:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(76, 175, 80, 0.2);
    border-color: #4caf50;
}

/* 奇数项：内容在左，右边空白 */
.process-item:nth-child(odd) .process-content {
    grid-column: 1;
    text-align: right;
}

.process-item:nth-child(odd) .process-number {
    grid-column: 2;
}

.process-item:nth-child(odd) .process-spacer {
    grid-column: 3;
}

/* 偶数项：内容在右，左边空白 */
.process-item:nth-child(even) .process-content {
    grid-column: 3;
    text-align: left;
}

.process-item:nth-child(even) .process-number {
    grid-column: 2;
}

.process-item:nth-child(even) .process-spacer {
    grid-column: 1;
}

.process-content h3 {
    font-size: 26px;
    font-weight: 600;
    color: #2e7d32;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.process-item:nth-child(odd) .process-content h3::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: -5px;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, #4caf50, #66bb6a);
    border-radius: 2px;
}

.process-item:nth-child(even) .process-content h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, #4caf50, #66bb6a);
    border-radius: 2px;
}

.process-content p {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-top: 20px;
}

.process-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 28px;
    font-weight: 700;
    border: 6px solid #e8f5e9;
    z-index: 2;
    box-shadow: 0 8px 30px rgba(76, 175, 80, 0.3);
    transition: all 0.3s ease;
    margin: 0 auto;
}

.process-item:hover .process-number {
    transform: scale(1.1) rotate(360deg);
    box-shadow: 0 12px 40px rgba(76, 175, 80, 0.4);
}

.process-spacer {
    /* 空白占位 */
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .business-intro-content,
    .solution-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .business-intro-image {
        height: 400px;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid,
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .process-item {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .process-timeline::before {
        left: 30px;
    }

    .process-number {
        margin: 0;
        position: absolute;
        left: 30px;
        top: 20px;
    }

    .process-spacer {
        display: none;
    }

    .process-item:nth-child(odd) .process-content,
    .process-item:nth-child(even) .process-content {
        grid-column: 1;
        text-align: left;
        margin-left: 100px;
    }

    .process-item:nth-child(odd) .process-number,
    .process-item:nth-child(even) .process-number {
        grid-column: 1;
    }

    .process-item:nth-child(odd) .process-content h3::after {
        left: 0;
        right: auto;
    }
}

@media (max-width: 768px) {
    .business-intro,
    .core-advantages,
    .solution-categories,
    .partner-brands,
    .service-process {
        padding: 60px 0;
    }

    .business-intro-text h2,
    .core-advantages .section-header h2,
    .solution-categories .section-header h2,
    .partner-brands .section-header h2,
    .service-process .section-header h2 {
        font-size: 36px;
    }

    .advantages-grid,
    .solution-grid,
    .stats-grid,
    .brands-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .business-intro-image {
        height: 300px;
    }

    .stat-number {
        font-size: 40px;
    }
}