/* 加载动画样式 */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.loader-content {
    text-align: center;
    color: white;
}

.loader-logo {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: 2px;
}

.loader-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.5rem;
}

.loader-spinner > div {
    width: 12px;
    height: 12px;
    background-color: white;
    border-radius: 100%;
    display: inline-block;
    margin: 0 3px;
    animation: sk-bouncedelay 1.4s infinite ease-in-out both;
}

.loader-spinner .bounce1 {
    animation-delay: -0.32s;
}

.loader-spinner .bounce2 {
    animation-delay: -0.16s;
}

@keyframes sk-bouncedelay {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1.0);
    }
}

.loader-text {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

#main-content {
    transition: opacity 0.3s ease;
}

/* 错误提示样式 */
.error-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.error-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #fff;
}

.error-text {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.retry-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: white;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
}

.retry-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
}

.retry-btn:active {
    transform: translateY(0);
}

.error-tips {
    opacity: 0.7;
    font-size: 0.9rem;
    line-height: 1.6;
}

.error-tips small {
    color: rgba(255, 255, 255, 0.8);
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 0.8rem;
    color: #666;
    margin-left: 8px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主横幅 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
    overflow: hidden;
}

.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"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grain)"/></svg>');
    opacity: 0.5;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #2E7D32, #4CAF50);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    color: white;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(76, 175, 80, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #4CAF50;
    border: 2px solid #4CAF50;
}

.btn-secondary:hover {
    background: #4CAF50;
    color: white;
    transform: translateY(-2px);
}

.floating-card {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
    animation: float 6s ease-in-out infinite;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.floating-card h3 {
    color: #2E7D32;
    margin-bottom: 0.5rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* 产品展示 */
.products {
    padding: 80px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2E7D32;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.product-card.featured {
    border: 2px solid #4CAF50;
    transform: scale(1.02);
}

.product-image {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
}

.product-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(135deg, #FF6B6B, #EE5A52);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.product-card.featured .product-badge {
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
}

.product-info {
    padding: 2rem;
}

.product-info h3 {
    font-size: 1.5rem;
    color: #2E7D32;
    margin-bottom: 1rem;
}

.product-info p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.feature {
    background: rgba(76, 175, 80, 0.1);
    color: #2E7D32;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
}

.btn-product {
    width: 100%;
    padding: 12px;
    background: transparent;
    color: #4CAF50;
    border: 2px solid #4CAF50;
    border-radius: 25px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-product:hover {
    background: #4CAF50;
    color: white;
}

.btn-product.featured {
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    color: white;
    border: none;
}

/* 品牌优势 */
.advantages {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.advantages h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2E7D32;
    margin-bottom: 4rem;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advantage-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 20px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-5px);
}

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.advantage-item h3 {
    color: #2E7D32;
    margin-bottom: 1rem;
}

.advantage-item p {
    color: #666;
    line-height: 1.6;
}

/* 关于我们 */
.about {
    padding: 80px 0;
    background: white;
}

.about-content {
    display: block;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text h2 {
    font-size: 2.5rem;
    color: #2E7D32;
    margin-bottom: 2rem;
}

.about-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 2rem;
    font-size: 1.1rem;
    text-align: left;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    min-width: 120px;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: #4CAF50;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-label {
    color: #666;
    font-size: 1rem;
    font-weight: 500;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #2E7D32;
    margin-bottom: 4rem;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: stretch;
    min-height: 400px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: 100%;
    justify-content: space-between;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    flex: 1;
}

.contact-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.contact-item h4 {
    color: #2E7D32;
    margin-bottom: 0.3rem;
    font-size: 1rem;
    font-weight: 600;
}

.contact-item p {
    color: #666;
    font-size: 0.95rem;
    margin: 0;
    font-weight: 500;
}

.contact-form {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: white;
    padding: 1.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex: 1;
}

.contact-form input,
.contact-form textarea {
    padding: 0.8rem;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    width: 100%;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form button {
    margin-top: auto;
    padding: 0.8rem 2rem;
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    color: white;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(76, 175, 80, 0.3);
}

.contact-form button:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(76, 175, 80, 0.2);
}

/* 页脚 */
.footer {
    background: #2E7D32;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

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

.footer-section a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 25px;
    text-decoration: none;
    transition: background 0.3s ease;
}

.social-links a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 20px;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .stats {
        justify-content: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .stats {
        flex-direction: column;
        gap: 1rem;
    }
}