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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

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

/* 导航栏 */
.navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #2e7d32;
}

.nav-links {
    display: flex;
    gap: 25px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: #333;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: #2e7d32;
    color: white;
}

.btn-white {
    background: white;
    color: #2e7d32;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 18px;
}

/* 英雄区 */
.hero {
    background: linear-gradient(135deg, #2e7d32 0%, #4caf50 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 15px;
}

.subtitle {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin: 40px 0;
}

.stat-number {
    font-size: 40px;
    font-weight: bold;
}

/* 通用区块 */
.section {
    padding: 70px 0;
}

.bg-gray {
    background: #f5f5f5;
}

.bg-primary {
    background: linear-gradient(135deg, #2e7d32 0%, #4caf50 100%);
    color: white;
}

.section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 15px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    margin-bottom: 50px;
    opacity: 0.9;
}

.white {
    color: white;
}

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

.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

/* 特色卡片 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    border-radius: 10px;
    background: white;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.feature-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 22px;
}

/* 步骤 */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: #ff9800;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    margin: 0 auto 20px;
}

/* 支持列表 */
.supports {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.support-item {
    font-size: 18px;
    padding: 15px;
    background: white;
    border-radius: 8px;
}

/* 表单 */
.signup-form {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: 10px;
    color: #333;
}

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

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

.input,
.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.form-tip {
    text-align: center;
    font-size: 14px;
    color: #666;
    margin-top: 15px;
}

/* 政策卡片 */
.policy-card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.policy-card h3 {
    margin-bottom: 20px;
    color: #2e7d32;
}

.policy-card ul,
.policy-card ol {
    padding-left: 20px;
}

.policy-card li {
    margin-bottom: 10px;
    font-size: 16px;
}

/* 案例 */
.case-list {
    display: grid;
    gap: 30px;
}

.case-card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.case-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.case-avatar {
    font-size: 40px;
}

.case-sub {
    color: #666;
    font-size: 14px;
}

.case-result {
    margin-top: 15px;
    display: flex;
    gap: 30px;
    font-weight: 500;
    color: #2e7d32;
}

/* FAQ */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.faq-item h3 {
    margin-bottom: 15px;
    color: #2e7d32;
}

/* 知识库 */
.knowledge-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.category-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.category-icon {
    font-size: 40px;
    margin-bottom: 15px;
}

.category-card h3 {
    margin-bottom: 10px;
    color: #2e7d32;
}

.category-card ul {
    margin-top: 15px;
    padding-left: 20px;
}

.category-card li {
    margin-bottom: 8px;
}

.contact-box {
    margin-top: 50px;
    background: #fff3e0;
    padding: 30px;
    border-radius: 10px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

/* 登录弹窗 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.modal-content h2 {
    margin-bottom: 15px;
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    padding: 50px 0 20px;
}

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

.footer-content a {
    color: #ccc;
    text-decoration: none;
}

.footer-content h4 {
    margin-bottom: 15px;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #ccc;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }
    
    .subtitle {
        font-size: 18px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .nav-links {
        gap: 15px;
        font-size: 14px;
    }
    
    .nav-links .btn {
        padding: 8px 15px;
    }
}