:root {
    --primary: #2c7c4e;
    --secondary: #4a90e2;
    --accent: #ff9d1f;
    --light: #f8f9fa;
    --dark: #333;
    --gray: #6c757d;
    --border-radius: 6px;
    --box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    color: #333;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 导航栏样式 */
header {
    background: rgba(255,255,255,0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    position: relative;
    padding: 5px 0;
    transition: all 0.3s;
}

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

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

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

.btn {
    display: inline-block;
    padding: 10px 25px;
    background: var(--primary);
    color: white;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid var(--primary);
    cursor: pointer;
}

.btn:hover {
    background: transparent;
    color: var(--primary);
    transform: translateY(-3px);
}

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

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

/* Hero区域 */
.hero {
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    height: 100vh;
    display: flex;
    align-items: center;
    color: white;
    text-align: center;
    padding-top: 70px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(44, 124, 78, 0.9), rgba(44, 124, 78, 0.85));
    z-index: 0;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 15px;
}

/* 关于我们部分 */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
    position: relative;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent);
}

.section-header p {
    max-width: 700px;
    margin: 15px auto 0;
    color: var(--gray);
    font-size: 1.1rem;
}

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

.about-img img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.about-content h3 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.feature-list {
    margin: 30px 0;
    list-style-type: none;
}

.feature-list li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
}

.feature-list li::before {
    content: '\f00c';
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 13px;
    color: var(--primary);
}

/* 产品部分 */
.products {
    background: var(--light);
}

.product-nav {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.product-nav button {
    padding: 8px 20px;
    margin: 5px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s;
}

.product-nav button.active, .product-nav button:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-img {
    height: 180px;
    overflow: hidden;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

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

.product-content {
    padding: 20px;
}

.product-content h3 {
    color: var(--primary);
    margin-bottom: 10px;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 15px;
}

.product-price {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--accent);
    margin: 10px 0;
}

/* 供应商 */
.suppliers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px;
}

.supplier-card {
    text-align: center;
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: all 0.3s;
}

.supplier-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.supplier-card img {
    height: 60px;
    margin-bottom: 15px;
}

/* 优势部分 */
.advantages {
    background: linear-gradient(to right, var(--primary), #1a5630);
    color: white;
    padding: 80px 0;
}

.advantages .section-header h2 {
    color: white;
}

.advantages .section-header h2::after {
    background: white;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.advantage-card {
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: var(--border-radius);
    backdrop-filter: blur(5px);
    text-align: center;
    transition: transform 0.3s;
}

.advantage-card:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.15);
}

.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--accent);
}

.advantage-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

/* 联系区域 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.contact-details {
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    margin-bottom: 15px;
}

.contact-icon {
    font-size: 1.2rem;
    color: var(--primary);
    min-width: 30px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

/* 页脚 */
footer {
    background: #1d2e28;
    color: white;
    padding: 60px 0 30px;
}

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

.footer-about img {
    height: 40px;
    margin-bottom: 15px;
}

.footer-about p {
    margin-bottom: 20px;
    opacity: 0.8;
}

.footer-heading {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
}

.footer-heading::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent);
}

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

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

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s;
}

.footer-links a:hover {
    color: white;
    text-decoration: underline;
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: white;
    transition: all 0.3s;
}

.social-icons a:hover {
    background: var(--accent);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.7;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h2 {
        font-size: 2.8rem;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
    }
    
    .nav-links {
        margin-top: 15px;
    }
    
    .nav-links li {
        margin: 0 10px;
    }
    
    .hero h2 {
        font-size: 2.2rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

/* 后台样式 */
.admin-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 1px solid #ddd;
}

.admin-title {
    font-size: 24px;
    color: var(--primary);
}

.admin-nav {
    background: #f8f9fa;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.admin-nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

.admin-nav a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s;
}

.admin-nav a:hover, .admin-nav a.active {
    background: var(--primary);
    color: white;
}

.admin-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.admin-card h2 {
    color: var(--primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

textarea.form-control {
    min-height: 100px;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th, .admin-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.admin-table th {
    background: #f8f9fa;
    font-weight: 600;
}

.admin-table tr:hover {
    background: #f8f9fa;
}

.action-buttons {
    display: flex;
    gap: 10px;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 14px;
}

.btn-danger {
    background: #dc3545;
    border-color: #dc3545;
}

.btn-danger:hover {
    color: #dc3545;
}

.btn-warning {
    background: #ffc107;
    border-color: #ffc107;
    color: #212529;
}

.btn-warning:hover {
    color: #212529;
    background: transparent;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: var(--border-radius);
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 30px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.login-logo {
    text-align: center;
    margin-bottom: 30px;
}

.login-logo img {
    height: 60px;
}

.login-title {
    text-align: center;
    color: var(--primary);
    margin-bottom: 30px;
}

.pagination {
    display: flex;
    justify-content: center;
    list-style: none;
    margin-top: 20px;
}

.pagination li {
    margin: 0 5px;
}

.pagination a {
    display: block;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-decoration: none;
    color: var(--primary);
    transition: all 0.3s;
}

.pagination a:hover, .pagination a.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}