/* ===================================
   ABOUT PAGE STYLES
   =================================== */

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #10b981;
    --accent: #f59e0b;
    --dark: #0f172a;
    --gray: #64748b;
    --light: #f1f5f9;
    --white: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* 允许关于页面内容复制 */
.about-hero,
.overview-section,
.advantages-section,
.products-section,
.quality-section,
.why-us-section,
.stats-section,
.cta-section {
    user-select: text;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
}

/* ===================================
   HERO SECTION
   =================================== */
.about-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 120px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    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="white" opacity="0.05"/></svg>');
    background-size: 200px;
    background-position: center;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
      margin-top: 50px; 
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease-out both;
}

.hero-subtitle {
    font-size: 24px;
    opacity: 0.95;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 30px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
    position: relative;
    z-index: 2;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.15);
    padding: 20px 30px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.meta-icon {
    color: var(--white);
}

.meta-text {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.meta-label {
    font-size: 14px;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.meta-value {
    font-size: 18px;
    font-weight: 600;
}

/* ===================================
   OVERVIEW SECTION
   =================================== */
.overview-section {
    padding: 80px 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 42px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 15px;
}

.section-header p {
    font-size: 20px;
    color: var(--gray);
}

.overview-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: start;
}

.overview-text {
    font-size: 22px;
    line-height: 1.8;
    color: var(--gray);
}

.overview-text p {
    margin-bottom: 20px;
}

.overview-text strong {
    color: var(--dark);
}

.location-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 40px;
    border-radius: 16px;
    color: var(--white);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.location-icon {
    margin-bottom: 20px;
    opacity: 0.9;
}

.location-card h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}

.location-card p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 20px;
}

.location-badges {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    backdrop-filter: blur(5px);
}

/* ===================================
   ADVANTAGES SECTION
   =================================== */
.advantages-section {
    padding: 80px 0;
    background: var(--light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.advantage-card {
    background: var(--white);
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: var(--white);
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 15px;
}

.advantage-card p {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.6;
}

.value-statement {
    margin-top: 40px;
}

.value-box {
    background: linear-gradient(135deg, var(--accent) 0%, #d97706 100%);
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    color: var(--white);
}

.value-box h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
}

.highlight-text {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 25px;
}

.value-list {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.value-list li {
    font-size: 18px;
    font-weight: 600;
}

/* ===================================
   PRODUCTS SECTION
   =================================== */
.products-section {
    padding: 80px 0;
    background: var(--white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--light);
    padding: 35px;
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-card.featured {
    background: linear-gradient(135deg, var(--secondary) 0%, #059669 100%);
    color: var(--white);
}

.product-card.featured p {
    color: rgba(255, 255, 255, 0.9);
}

.product-card.featured h3 {
    color: var(--white);
}

.product-card.featured .product-features li {
    color: rgba(255, 255, 255, 0.9);
}

.featured-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--white);
    color: var(--secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    box-shadow: var(--shadow);
}

.product-image {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    color: var(--primary);
}

.product-card.featured .product-image {
    color: var(--white);
}

.product-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 15px;
}

.product-card p {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.product-features {
    list-style: none;
    padding: 0;
    margin-top: 20px;
}

.product-features li {
    font-size: 14px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--gray);
}

.product-features li:last-child {
    border-bottom: none;
}

/* ===================================
   QUALITY SECTION
   =================================== */
.quality-section {
    padding: 80px 0;
    background: var(--light);
}

.quality-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.quality-card {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s ease;
}

.quality-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.quality-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.quality-icon.eco {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: var(--white);
}

.quality-icon.quality {
    background: linear-gradient(135deg, var(--accent) 0%, #d97706 100%);
    color: var(--white);
}

.quality-icon.sustainable {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.quality-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 15px;
}

.quality-card p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--gray);
}

.mission-statement {
    margin-top: 50px;
}

.mission-box {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 50px;
    border-radius: 12px;
    text-align: center;
    color: var(--white);
}

.mission-box h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
}

.mission-box p {
    font-size: 18px;
    line-height: 1.8;
    opacity: 0.95;
}

/* ===================================
   WHY US SECTION
   =================================== */
.why-us-section {
    padding: 80px 0;
    background: var(--white);
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.reason-item {
    display: flex;
    gap: 20px;
    background: var(--light);
    padding: 30px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.reason-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.reason-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    opacity: 0.2;
    line-height: 1;
    min-width: 60px;
}

.reason-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.reason-content p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--gray);
}

.partnership-cta {
    margin-top: 50px;
}

.cta-content {
    background: linear-gradient(135deg, var(--secondary) 0%, #059669 100%);
    padding: 50px;
    border-radius: 12px;
    text-align: center;
    color: var(--white);
}

.cta-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 18px;
    opacity: 0.95;
    margin-bottom: 30px;
    line-height: 1.6;
}

/* ===================================
   STATS SECTION
   =================================== */
.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--dark) 0%, #1e293b 100%);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 30px;
}

.stat-number {
    font-size: 56px;
    font-weight: 800;
    color: rgb(255 255 255 / 90%);
    margin-bottom: 10px;
    line-height: 1;
}

.stat-label {
    font-size: 16px;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===================================
   CTA SECTION
   =================================== */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.cta-wrapper {
    display: flex;
    justify-content: center;
}

.cta-box {
    background: var(--white);
    padding: 50px 60px;
    border-radius: 12px;
    text-align: center;
    color: var(--dark);
    max-width: 600px;
    box-shadow: var(--shadow-lg);
}

.cta-box h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 15px;
}

.cta-box p {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-lg {
    padding: 20px 40px;
    font-size: 18px;
}

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

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .overview-content {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quality-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reasons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .about-hero {
        padding: 60px 0 40px;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-meta {
        flex-direction: column;
        gap: 15px;
    }
    
    .meta-item {
        width: 100%;
        justify-content: flex-start;
    }
    
    .section-header h2 {
        font-size: 32px;
    }
    
    .section-header p {
        font-size: 16px;
    }
    
    .overview-section,
    .advantages-section,
    .products-section,
    .quality-section,
    .why-us-section,
    .stats-section,
    .cta-section {
        padding: 50px 0;
    }
    
    .advantages-grid,
    .quality-content {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .reasons-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-number {
        font-size: 42px;
    }
    
    .location-badges {
        flex-direction: column;
    }
    
    .value-list {
        flex-direction: column;
        gap: 15px;
    }
    
    .cta-box {
        padding: 35px 25px;
    }
    
    .cta-content {
        padding: 35px 25px;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .section-header h2 {
        font-size: 24px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}