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

:root {
    --green-dark: #2d5a27;
    --green: #4a7c3f;
    --green-light: #6b9b5a;
    --brown-dark: #5c3d2e;
    --brown: #8b5a3c;
    --brown-light: #c4956a;
    --cream: #f5f0e6;
    --white: #ffffff;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: var(--cream);
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--green-dark) 0%, var(--green) 50%, var(--brown) 100%);
    color: var(--white);
    padding: 120px 20px;
    text-align: center;
    position: relative;
}

.hero::before {
    content: "";
    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="rgba(255,255,255,0.03)"/></svg>');
    background-size: 200px;
}

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

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero .subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    background: var(--brown);
    color: var(--white);
    padding: 14px 36px;
    border-radius: 30px;
    font-size: 1rem;
    transition: all 0.3s;
    border: 2px solid var(--brown);
}

.btn:hover {
    background: var(--brown-dark);
    border-color: var(--brown-dark);
    transform: translateY(-2px);
}

/* Nav */
.nav {
    background: var(--green-dark);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-list {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.nav-list li a {
    display: block;
    color: var(--white);
    padding: 16px 24px;
    transition: background 0.3s;
}

.nav-list li a:hover {
    background: var(--green);
}

/* Sections */
.section {
    padding: 80px 0;
}

.section h2 {
    text-align: center;
    font-size: 2rem;
    color: var(--green-dark);
    margin-bottom: 50px;
    position: relative;
}

.section h2::after {
    content: "";
    display: block;
    width: 60px;
    height: 4px;
    background: var(--brown);
    margin: 15px auto 0;
    border-radius: 2px;
}

.bg-light {
    background: var(--white);
}

/* About */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    color: #555;
}

.placeholder-img {
    background: linear-gradient(135deg, var(--green-light), var(--brown-light));
    height: 300px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
}

/* Products */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--cream);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 2px solid transparent;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-color: var(--green);
}

.product-img {
    background: linear-gradient(135deg, var(--green), var(--brown));
    height: 150px;
    border-radius: 10px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
}

.product-card h3 {
    color: var(--green-dark);
    margin-bottom: 10px;
}

.product-card p {
    color: #777;
    margin-bottom: 15px;
}

.price {
    display: inline-block;
    background: var(--brown);
    color: var(--white);
    padding: 6px 20px;
    border-radius: 20px;
    font-weight: bold;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px 20px;
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--green);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin: 0 auto 20px;
}

.feature-item h3 {
    color: var(--green-dark);
    margin-bottom: 10px;
}

.feature-item p {
    color: #666;
}

/* Contact */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.contact-info p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.contact-form {
    text-align: center;
    padding: 40px;
    background: var(--cream);
    border-radius: 12px;
}

.contact-form p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

/* Footer */
.footer {
    background: var(--brown-dark);
    color: var(--white);
    text-align: center;
    padding: 40px 20px;
}

.footer p {
    margin-bottom: 10px;
    opacity: 0.9;
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 80px 20px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .nav-list {
        flex-direction: column;
        text-align: center;
    }

    .nav-list li a {
        padding: 12px;
        border-bottom: 1px solid var(--green);
    }

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

    .about-image {
        order: -1;
    }

    .section {
        padding: 50px 0;
    }

    .section h2 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.6rem;
    }

    .btn {
        padding: 12px 28px;
    }

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