/* 保定拓维节能 - 绿色环保风格 */

:root {
    --eco-green: #2ecc71;
    --eco-dark-green: #27ae60;
    --eco-light-green: #58d68d;
    --eco-blue: #3498db;
    --eco-dark: #1e3a2e;
    --eco-light: #e8f8f5;
}

body {
    font-family: 'Poppins', 'Microsoft YaHei', sans-serif;
    background: #ffffff;
    color: #2c3e50;
    line-height: 1.6;
}

/* 导航栏 - 清新绿色 */
.navbar-eco {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(46, 204, 113, 0.1);
    z-index: 1000;
    border-bottom: 3px solid var(--eco-green);
}

.logo-eco h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--eco-green), var(--eco-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

/* Hero - 环保主题 */
.hero-eco {
    min-height: 100vh;
    background: linear-gradient(135deg, #e8f8f5 0%, #d5f4e6 100%);
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-eco::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="rgba(46,204,113,0.05)"/></svg>');
    background-size: 200px;
    opacity: 0.3;
}

.eco-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--eco-green), var(--eco-dark-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 2rem;
}

/* 能效数据展示 */
.energy-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    padding: 5rem 0;
    background: white;
}

.energy-stat-card {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, var(--eco-light) 0%, #ffffff 100%);
    border-radius: 20px;
    border: 2px solid var(--eco-green);
    transition: all 0.4s ease;
    position: relative;
}

.energy-stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--eco-green), var(--eco-blue));
    opacity: 0;
    border-radius: 18px;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.energy-stat-card:hover::before {
    opacity: 0.1;
}

.energy-stat-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 50px rgba(46, 204, 113, 0.3);
}

.energy-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--eco-green), var(--eco-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
}

.energy-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--eco-green);
    margin-bottom: 0.5rem;
}

/* 解决方案卡片 */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    padding: 5rem 0;
}

.solution-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    border: 2px solid transparent;
}

.solution-card:hover {
    border-color: var(--eco-green);
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(46, 204, 113, 0.2);
}

.solution-image {
    height: 250px;
    overflow: hidden;
    position: relative;
}

.solution-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.solution-card:hover .solution-image img {
    transform: scale(1.1);
}

.solution-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--eco-green);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
}

.solution-content {
    padding: 2.5rem;
}

.solution-content h3 {
    font-size: 1.8rem;
    color: var(--eco-dark);
    margin-bottom: 1rem;
}

.solution-features {
    list-style: none;
    margin: 1.5rem 0;
}

.solution-features li {
    padding: 0.5rem 0;
    color: #555;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.solution-features li::before {
    content: '✓';
    color: var(--eco-green);
    font-weight: 900;
    font-size: 1.2rem;
}

/* 案例展示 */
.cases-section {
    padding: 5rem 0;
    background: var(--eco-light);
}

.case-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    display: flex;
    gap: 2rem;
    align-items: center;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(46, 204, 113, 0.2);
}

.case-image {
    width: 300px;
    height: 200px;
    border-radius: 10px;
    overflow: hidden;
    flex-shrink: 0;
}

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

.case-info h3 {
    font-size: 1.5rem;
    color: var(--eco-dark);
    margin-bottom: 1rem;
}

.case-stats {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.case-stat {
    text-align: center;
}

.case-stat-value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--eco-green);
}

.case-stat-label {
    font-size: 0.9rem;
    color: #777;
}

/* 响应式 */
@media (max-width: 1024px) {
    .energy-stats,
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .energy-stats,
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .case-card {
        flex-direction: column;
    }
    
    .case-image {
        width: 100%;
    }
}