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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fffe;
}

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

/* 导航栏样式 */
.navbar {
    background: linear-gradient(135deg, #2d7d47 0%, #4caf50 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    color: white;
    font-size: 24px;
    font-weight: bold;
}

.nav-logo i {
    margin-right: 10px;
    font-size: 28px;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-item {
    margin-left: 30px;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 25px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.user-center i {
    margin-right: 8px;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主内容区 */
.main-content {
    margin-top: 70px;
    min-height: calc(100vh - 70px);
}

/* 英雄区域 */
.hero-section {
    background: linear-gradient(135deg, #66bb6a 0%, #43a047 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::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="20" cy="20" r="2" fill="white" opacity="0.1"/><circle cx="80" cy="80" r="2" fill="white" opacity="0.1"/><circle cx="40" cy="60" r="1" fill="white" opacity="0.1"/></svg>') repeat;
}

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

.hero-title {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

/* 概览区域 */
.overview-section {
    padding: 80px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #2d7d47;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    border-radius: 2px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.stat-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    border-left: 5px solid #4caf50;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.stat-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    color: white;
    font-size: 24px;
}

.stat-content h3 {
    font-size: 2.2rem;
    color: #2d7d47;
    margin-bottom: 5px;
    font-weight: 700;
}

.stat-label {
    color: #666;
    font-size: 0.9rem;
}

/* 模块区域 */
.modules-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f1f8e9 0%, #e8f5e8 100%);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.module-card {
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
}

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

.module-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: white;
    font-size: 32px;
}

.module-title {
    font-size: 1.5rem;
    color: #2d7d47;
    margin-bottom: 15px;
    font-weight: 600;
}

.module-description {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.module-features {
    list-style: none;
    margin-bottom: 25px;
}

.module-features li {
    padding: 8px 0;
    color: #555;
    display: flex;
    align-items: center;
}

.module-features i {
    color: #4caf50;
    margin-right: 10px;
    font-size: 14px;
}

.module-stats {
    display: flex;
    justify-content: space-between;
    margin-bottom: 25px;
    padding: 15px;
    background: #f8fff8;
    border-radius: 10px;
}

.stat-item {
    font-size: 0.9rem;
    color: #666;
}

.stat-item strong {
    color: #4caf50;
    font-weight: 600;
}

.module-btn {
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    font-weight: 500;
}

.module-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.4);
}

.module-btn i {
    margin-left: 10px;
    transition: transform 0.3s ease;
}

.module-btn:hover i {
    transform: translateX(5px);
}

/* 新闻区域 */
.news-section {
    padding: 80px 0;
    background: white;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.news-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-left: 4px solid #4caf50;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.news-date {
    color: #4caf50;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 10px;
}

.news-title {
    color: #2d7d47;
    font-size: 1.2rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.news-content {
    color: #666;
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: #2d7d47;
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

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

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: white;
    font-size: 20px;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: #66bb6a;
    transform: translateY(-3px);
}

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

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    text-align: center;
}

.loading-icon {
    font-size: 48px;
    color: #4caf50;
    animation: spin 2s linear infinite;
}

.loading-spinner p {
    margin-top: 15px;
    color: #666;
    font-size: 1.1rem;
}

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

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: #2d7d47;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        margin: 10px 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .stat-card {
        padding: 20px;
    }

    .modules-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .module-card {
        padding: 30px 20px;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-section {
        padding: 60px 0;
    }

    .overview-section,
    .modules-section,
    .news-section {
        padding: 60px 0;
    }

    .stat-icon {
        width: 60px;
        height: 60px;
        font-size: 20px;
    }

    .module-icon {
        width: 70px;
        height: 70px;
        font-size: 28px;
    }

    .module-stats {
        flex-direction: column;
        gap: 10px;
    }
}