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

:root {
    --primary-color: #1a472a;
    --secondary-color: #4a7c59;
    --accent-color: #e67e22;
    --accent-light: #f39c12;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --white: #fff;
    --gray-light: #f8f9fa;
    --gray-medium: #ecf0f1;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    scroll-behavior: smooth;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 4px 30px rgba(0,0,0,0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 26px;
    font-weight: 800;
    letter-spacing: 1px;
}

.brand-tag {
    color: var(--secondary-color);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 5px 0;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

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

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

.hero {
    background: linear-gradient(rgba(26, 71, 42, 0.75), rgba(74, 124, 89, 0.6)),
                url('https://images.unsplash.com/photo-1504280390367-361c6d9f38f4?w=1920&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding-top: 60px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, transparent 20%, rgba(0,0,0,0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 10px rgba(0,0,0,0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.hero-content h2 {
    font-size: 52px;
    margin-bottom: 5px;
    font-weight: 700;
    letter-spacing: 2px;
}

.hero-content p {
    font-size: 22px;
    margin-bottom: 5px;
    opacity: 0.95;
}

.brand-highlight {
    color: #fff;
    font-size: 24px;
    font-weight: 600;
    margin: 15px 0;
    background: rgba(230, 126, 34, 0.95);
    padding: 12px 35px;
    border-radius: 30px;
    display: inline-block;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    color: var(--white);
    padding: 14px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    margin-top: 10px;
    box-shadow: 0 4px 15px rgba(230, 126, 34, 0.3);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(230, 126, 34, 0.4);
}

.btn:hover::before {
    left: 100%;
}

.section-title {
    text-align: center;
    font-size: 38px;
    color: var(--primary-color);
    margin-bottom: 60px;
    position: relative;
    font-weight: 700;
}

.section-title::before {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 4px;
    background: var(--accent-color);
    margin: 15px auto 0;
    border-radius: 2px;
}

.about {
    padding: 100px 0;
    background: var(--white);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, var(--gray-light), transparent);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    position: relative;
}

.about-text p {
    margin-bottom: 22px;
    color: var(--text-light);
    font-size: 16px;
    line-height: 1.8;
}

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

.feature-item {
    text-align: center;
    padding: 35px 25px;
    background: var(--gray-light);
    border-radius: 15px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--secondary-color);
}

.feature-item h3 {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 12px;
    font-weight: 800;
}

.feature-item p {
    color: var(--text-light);
    font-size: 15px;
    font-weight: 500;
}

.brand {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.brand::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, var(--white), transparent);
}

.brand-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.brand-intro {
    padding-right: 20px;
}

.brand-intro h3 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 25px;
    font-weight: 700;
}

.brand-intro p {
    color: var(--text-light);
    margin-bottom: 18px;
    line-height: 1.8;
    font-size: 16px;
}

.brand-values {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.value-item {
    padding: 28px 24px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border-left: 4px solid var(--accent-color);
}

.value-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-hover);
}

.value-item h4 {
    color: var(--primary-color);
    font-size: 20px;
    margin-bottom: 8px;
    font-weight: 700;
}

.value-item p {
    color: var(--text-light);
    font-size: 15px;
}

.products {
    padding: 100px 0;
    background: var(--white);
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, #e9ecef, transparent);
}

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

.product-card {
    background: linear-gradient(135deg, var(--white), var(--gray-light));
    padding: 45px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.4s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.product-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-hover);
    border-color: var(--secondary-color);
}

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

.product-icon {
    font-size: 56px;
    margin-bottom: 22px;
    display: inline-block;
    transition: transform 0.4s ease;
}

.product-card:hover .product-icon {
    transform: scale(1.2) rotate(5deg);
}

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

.product-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
}

.contact {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, var(--white), transparent);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.info-item {
    margin-bottom: 30px;
    padding-left: 15px;
    border-left: 3px solid var(--accent-color);
}

.info-item h4 {
    color: var(--primary-color);
    font-size: 17px;
    margin-bottom: 10px;
    font-weight: 700;
}

.info-item p {
    color: var(--text-light);
    font-size: 15px;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.contact-form h4 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 25px;
    font-weight: 700;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(74, 124, 89, 0.1);
}

.btn-submit {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 14px 45px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(26, 71, 42, 0.2);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 71, 42, 0.3);
}

.footer {
    background: linear-gradient(135deg, #1a1a1a, #2d3436);
    color: var(--white);
    padding: 60px 0 25px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 26px;
    margin-bottom: 10px;
    font-weight: 800;
}

.footer-brand p {
    color: var(--accent-light);
    font-weight: 600;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 18px;
    margin-bottom: 18px;
    color: var(--white);
    font-weight: 600;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a,
.footer-contact p {
    color: #b2bec3;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--accent-light);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    color: #999;
    font-size: 14px;
}

@media (max-width: 992px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content,
    .brand-content,
    .contact-content {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
        padding: 15px 20px;
    }

    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }

    .hero-content h2 {
        font-size: 32px;
    }

    .hero-content p {
        font-size: 18px;
    }

    .brand-highlight {
        font-size: 20px;
        padding: 10px 20px;
    }

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

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

    .product-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 30px;
    }

    .section-title {
        font-size: 28px;
    }

    .contact-info,
    .contact-form {
        padding: 30px 20px;
    }

    .about,
    .brand,
    .products,
    .contact {
        padding: 70px 0;
    }
}

@media (max-width: 480px) {
    .hero-content h2 {
        font-size: 26px;
    }

    .nav a {
        font-size: 14px;
    }

    .logo h1 {
        font-size: 22px;
    }

    .btn {
        padding: 12px 35px;
        font-size: 15px;
    }

    .product-card {
        padding: 35px 25px;
    }
}