* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a9f6e;
    --primary-dark: #158a5a;
    --primary-light: #2ecf94;
    --secondary-color: #0d6e4e;
    --accent-color: #34d399;
    --text-dark: #1f2937;
    --text-medium: #4b5563;
    --text-light: #6b7280;
    --bg-light: #f0fdf4;
    --bg-white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(26, 159, 110, 0.08);
    --shadow-md: 0 8px 25px rgba(26, 159, 110, 0.12);
    --shadow-lg: 0 20px 50px rgba(26, 159, 110, 0.18);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.8;
    color: var(--text-dark);
    background: linear-gradient(180deg, #f0fdf4 0%, #ecfdf5 50%, #d1fae5 100%);
    background-attachment: fixed;
    scroll-behavior: smooth;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 30px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 18px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    letter-spacing: 0.5px;
}

.nav-logo span {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-left: 12px;
    font-weight: 400;
    letter-spacing: 0.3px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-menu li {
    margin-left: 32px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 8px 0;
    display: inline-block;
    font-size: 1rem;
    letter-spacing: 0.3px;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.hero-banner {
    background: linear-gradient(180deg, #d1fae5 0%, #a7f3d0 50%, #6ee7b7 100%);
    color: var(--text-dark);
    padding: 200px 0 160px;
    text-align: center;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(26, 159, 110, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(52, 211, 153, 0.1) 0%, transparent 40%);
}

.banner-content {
    position: relative;
    z-index: 1;
}

.banner-content h1 {
    font-size: 3.2rem;
    margin-bottom: 28px;
    line-height: 1.3;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--secondary-color);
    animation: fadeInUp 0.8s ease-out;
}

.banner-content p {
    font-size: 1.2rem;
    margin-bottom: 45px;
    color: var(--text-medium);
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease-out 0.15s forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(25px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: #fff;
    padding: 18px 45px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    box-shadow: 0 8px 25px rgba(26, 159, 110, 0.35);
    animation: fadeInUp 0.8s ease-out 0.3s forwards;
    opacity: 0;
    letter-spacing: 0.5px;
    font-size: 1rem;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(26, 159, 110, 0.45);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
}

.core-services {
    padding: 120px 0;
    background: var(--bg-white);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.service-card {
    background: linear-gradient(145deg, #f0fdf4 0%, #d1fae5 100%);
    padding: 50px 45px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(26, 159, 110, 0.1);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-card h3 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(26, 159, 110, 0.1);
    position: relative;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.service-card h3::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 80px;
    height: 1px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
}

.service-card p {
    color: var(--text-medium);
    margin-bottom: 28px;
    line-height: 1.9;
    font-size: 1rem;
    text-align: justify;
}

.advantages h4 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.advantages ul {
    list-style: none;
}

.advantages li {
    padding: 14px 0;
    padding-left: 28px;
    position: relative;
    color: var(--text-medium);
    border-bottom: 1px solid rgba(26, 159, 110, 0.05);
    transition: var(--transition);
    font-size: 0.95rem;
}

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

.advantages li:hover {
    color: var(--primary-dark);
    padding-left: 32px;
}

.advantages li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 0.9rem;
}

.page-header {
    background: linear-gradient(180deg, #d1fae5 0%, #a7f3d0 100%);
    color: var(--text-dark);
    padding: 200px 0 160px;
    text-align: center;
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 24px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--secondary-color);
}

.products-section {
    padding: 120px 0;
    background: var(--bg-white);
}

.products-section h2 {
    font-size: 2.4rem;
    text-align: center;
    margin-bottom: 70px;
    color: var(--secondary-color);
    position: relative;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.products-section h2::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 1px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(480px, 1fr));
    gap: 40px;
    margin-bottom: 80px;
}

.product-item {
    background: linear-gradient(145deg, #f0fdf4 0%, #d1fae5 100%);
    padding: 45px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(26, 159, 110, 0.1);
}

.product-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-item h3 {
    font-size: 1.6rem;
    color: var(--secondary-color);
    margin-bottom: 22px;
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(26, 159, 110, 0.1);
    font-weight: 600;
    letter-spacing: 0.3px;
}

.product-item h4 {
    color: var(--primary-color);
    margin: 25px 0 16px;
    font-size: 1.1rem;
    font-weight: 600;
}

.product-item ul {
    list-style: none;
}

.product-item li {
    padding: 12px 0;
    padding-left: 26px;
    position: relative;
    color: var(--text-medium);
    border-bottom: 1px solid rgba(26, 159, 110, 0.03);
    transition: var(--transition);
    font-size: 0.95rem;
}

.product-item li:hover {
    padding-left: 30px;
}

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

.product-item li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.4rem;
    line-height: 1;
    top: 50%;
    transform: translateY(-50%);
}

.content-section {
    padding: 120px 0;
    background: var(--bg-white);
}

.content-section h2 {
    font-size: 2.2rem;
    color: var(--secondary-color);
    margin-bottom: 35px;
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(26, 159, 110, 0.1);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.content-section h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin: 35px 0 20px;
    font-weight: 600;
}

.content-section p {
    color: var(--text-medium);
    margin-bottom: 20px;
    line-height: 2;
    font-size: 1rem;
    text-align: justify;
}

.content-section ul {
    margin: 20px 0;
    padding-left: 25px;
}

.content-section li {
    color: var(--text-medium);
    margin-bottom: 12px;
    line-height: 1.8;
    font-size: 1rem;
}

.content-section li::marker {
    color: var(--primary-color);
}

.contact-section {
    padding: 120px 0;
    background: var(--bg-white);
}

.contact-section h2 {
    font-size: 2.2rem;
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 50px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    background: linear-gradient(145deg, #f0fdf4 0%, #d1fae5 100%);
    padding: 45px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(26, 159, 110, 0.1);
}

.contact-info h2 {
    font-size: 1.6rem;
    color: var(--secondary-color);
    margin-bottom: 28px;
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(26, 159, 110, 0.1);
    font-weight: 600;
}

.contact-details {
    list-style: none;
}

.contact-item {
    padding: 16px 0;
    color: var(--text-medium);
    font-size: 1rem;
    line-height: 1.7;
    border-bottom: 1px solid rgba(26, 159, 110, 0.05);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item strong {
    color: var(--secondary-color);
    font-weight: 600;
    min-width: 85px;
    display: inline-block;
}

.contact-form {
    background: linear-gradient(145deg, #f0fdf4 0%, #d1fae5 100%);
    padding: 45px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(26, 159, 110, 0.1);
}

.contact-form h2 {
    font-size: 1.6rem;
    color: var(--secondary-color);
    margin-bottom: 28px;
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(26, 159, 110, 0.1);
    font-weight: 600;
}

.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    color: var(--text-dark);
    font-weight: 500;
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid rgba(26, 159, 110, 0.2);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-dark);
    background: var(--bg-white);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 159, 110, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.contact-form .btn-primary {
    width: 100%;
    padding: 16px 30px;
    font-size: 1rem;
    cursor: pointer;
}

.contact-card {
    background: linear-gradient(145deg, #f0fdf4 0%, #d1fae5 100%);
    padding: 40px 35px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(26, 159, 110, 0.1);
}

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

.contact-card h3 {
    font-size: 1.3rem;
    color: var(--secondary-color);
    margin-bottom: 18px;
    font-weight: 600;
}

.contact-card p {
    color: var(--text-medium);
    font-size: 1rem;
    line-height: 1.7;
}

.about-section {
    padding: 120px 0;
    background: var(--bg-white);
}

.about-section h2 {
    font-size: 2.2rem;
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 50px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

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

.about-content h2 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 24px;
    padding-bottom: 18px;
    border-bottom: 1px solid rgba(26, 159, 110, 0.1);
    font-weight: 600;
    letter-spacing: 0.5px;
    grid-column: 1 / -1;
}

.about-content h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: 600;
}

.about-content p {
    color: var(--text-medium);
    margin-bottom: 18px;
    line-height: 1.9;
    font-size: 1rem;
    text-align: justify;
}

.about-content ol {
    margin: 25px 0;
    padding-left: 25px;
    grid-column: 1 / -1;
}

.about-content ol li {
    color: var(--text-medium);
    margin-bottom: 16px;
    line-height: 1.8;
    font-size: 1rem;
}

.about-content ol li strong {
    color: var(--primary-color);
    font-weight: 600;
}

.about-image {
    background: linear-gradient(145deg, #d1fae5 0%, #a7f3d0 100%);
    border-radius: var(--radius-lg);
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
}

.footer {
    background: linear-gradient(180deg, #065f46 0%, #064e3b 100%);
    color: #d1fae5;
    padding: 0;
}

.footer-top {
    padding: 35px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.footer-column p {
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}

.footer-bottom {
    padding: 25px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    opacity: 0.8;
    letter-spacing: 0.3px;
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-logo h1 {
        font-size: 1.4rem;
    }

    .nav-logo span {
        display: none;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 5px;
    }

    .nav-menu li {
        margin-left: 15px;
        margin-right: 15px;
    }

    .banner-content h1 {
        font-size: 2rem;
    }

    .banner-content p {
        font-size: 1rem;
        padding: 0 20px;
    }

    .hero-banner,
    .page-header {
        padding: 160px 0 120px;
    }

    .service-grid,
    .product-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .service-card,
    .product-item {
        padding: 35px 28px;
    }

    .service-card h3,
    .product-item h3 {
        font-size: 1.5rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .contact-info,
    .contact-form {
        padding: 30px 25px;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        height: 250px;
    }

    .footer-container {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
}