/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #009145;
    --primary-dark: #006837;
    --primary-light: #00B359;
    --accent-color: #D4AF37;
    --text-color: #333333;
    --text-light: #666666;
    --bg-light: #F5F7FA;
    --white: #FFFFFF;
    --shadow: 0 2px 20px rgba(0, 145, 69, 0.1);
    --shadow-hover: 0 5px 30px rgba(0, 145, 69, 0.2);
}

body {
    font-family: '思源黑体', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    height: 50px;
    width: auto;
}

.brand-name {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-menu a {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-color);
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Hero 区域 */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    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"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: 50px 50px;
    animation: moveBackground 100s linear infinite;
}

@keyframes moveBackground {
    from { background-position: 0 0; }
    to { background-position: 100% 100%; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
}

.hero-title {
    font-size: 64px;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 32px;
    margin-bottom: 15px;
    font-weight: 300;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-tagline {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.6s both;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 15px 40px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 145, 69, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 145, 69, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-large {
    padding: 20px 60px;
    font-size: 18px;
}

.btn-block {
    display: block;
    width: 100%;
}

/* 通用区块样式 */
section {
    padding: 100px 0;
}

.section-title {
    font-size: 42px;
    text-align: center;
    margin-bottom: 20px;
    color: var(--text-color);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    margin: 20px auto 0;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 60px;
}

/* 核心优势 */
.features {
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.feature-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-light);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    background: var(--white);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

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

.feature-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 关于我们 */
.about {
    background: var(--bg-light);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-lead {
    font-size: 24px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 25px;
    text-align: center;
}

.about-text p {
    font-size: 16px;
    line-height: 2;
    color: var(--text-light);
    margin-bottom: 20px;
    text-align: center;
}

.about-list {
    margin: 30px 0;
    text-align: center;
}

.about-list li {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-color);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 60px;
    padding: 40px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-light);
}

/* 产品服务 */
.services {
    background: var(--white);
}

.services-tabs {
    margin-top: 60px;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
}

.tab-btn {
    padding: 15px 40px;
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.tab-btn.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.service-card {
    background: var(--bg-light);
    border-radius: 15px;
    padding: 40px 30px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    background: var(--white);
}

.service-card.featured {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.service-card.featured h3,
.service-card.featured p,
.service-card.featured .service-features li {
    color: var(--white);
}

.service-icon {
    font-size: 56px;
    margin-bottom: 25px;
}

.service-card h3 {
    font-size: 26px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.service-card p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 25px;
    line-height: 1.8;
}

.service-features {
    list-style: none;
}

.service-features li {
    font-size: 15px;
    color: var(--text-color);
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.service-card.featured .service-features li::before {
    color: var(--white);
}

.service-highlight {
    margin-top: 30px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    border: 2px solid var(--accent-color);
}

.highlight-tag {
    display: inline-block;
    padding: 5px 15px;
    background: var(--accent-color);
    color: var(--white);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 10px;
}

.service-highlight p {
    font-size: 14px;
    margin: 0;
    opacity: 0.9;
}

/* 行动号召 */
.cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 80px 0;
    text-align: center;
}

.cta h2 {
    font-size: 42px;
    color: var(--white);
    margin-bottom: 15px;
}

.cta-slogan {
    font-size: 24px;
    color: var(--white);
    opacity: 0.9;
    margin-bottom: 40px;
}

/* 联系我们 */
.contact {
    background: var(--bg-light);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 25px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.contact-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.contact-details p {
    font-size: 16px;
    color: var(--text-light);
}

.contact-details a {
    color: var(--primary-color);
    font-weight: 600;
    transition: color 0.3s ease;
}

.contact-details a:hover {
    color: var(--primary-dark);
}

.contact-form-wrapper {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #E0E0E0;
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--bg-light);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(0, 145, 69, 0.1);
}

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

/* 页脚 */
.footer {
    background: var(--primary-dark);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-logo {
    height: 50px;
    width: auto;
}

.footer-brand p {
    font-size: 16px;
    opacity: 0.9;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: var(--white);
    font-size: 16px;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    font-size: 14px;
    opacity: 0.7;
}

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

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .features-grid,
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 24px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .features-grid,
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .tab-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .btn {
        padding: 12px 30px;
        font-size: 14px;
    }
    
    section {
        padding: 60px 0;
    }
}