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

:root {
    --primary-color: #409eff;
    --secondary-color: #67c23a;
    --accent-color: #e6a23c;
    --danger-color: #f56c6c;
    --text-primary: #303133;
    --text-secondary: #606266;
    --text-light: #909399;
    --bg-light: #f5f7fa;
    --bg-white: #ffffff;
    --border-color: #dcdfe6;
    --shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px 0 rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-white);
}

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

/* 导航栏 */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 24px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s;
    padding: 8px 0;
    position: relative;
}

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.btn-login {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    padding: 8px 20px !important;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-login::after {
    display: none !important;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    position: relative;
    transition: background 0.3s;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    transition: transform 0.3s, top 0.3s;
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

.nav-toggle-open .hamburger {
    background: transparent;
}

.nav-toggle-open .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle-open .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* 主横幅 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 150px 0 100px;
    text-align: center;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 15px;
    opacity: 0.95;
}

.hero-description {
    font-size: 16px;
    max-width: 800px;
    margin: 0 auto 40px;
    opacity: 0.85;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: white;
    color: #667eea;
}

.btn-primary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* 区块标题 */
.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 50px;
}

/* 功能模块 */
.features {
    padding: 80px 0;
    background: var(--bg-light);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-white);
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon i {
    font-size: 32px;
    color: white;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.feature-list {
    list-style: none;
    margin-bottom: 20px;
}

.feature-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-list li i {
    color: var(--secondary-color);
    font-size: 14px;
}

.feature-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: gap 0.3s;
}

.feature-link:hover {
    gap: 12px;
}

/* 数据统计 */
.stats {
    padding: 60px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
}

/* 核心优势 */
.advantages {
    padding: 80px 0;
}

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

.advantage-item {
    text-align: center;
    padding: 30px;
}

.advantage-item i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.advantage-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.advantage-item p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 适用场景 */
.scenarios {
    padding: 80px 0;
    background: var(--bg-light);
}

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

.scenario-card {
    background: var(--bg-white);
    padding: 35px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.scenario-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.scenario-card i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.scenario-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.scenario-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 18px;
    margin-bottom: 15px;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

/* 行动号召区域 */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0;
    text-align: center;
    color: white;
}

.cta-content h2 {
    font-size: 36px;
    margin-bottom: 15px;
    font-weight: 700;
}

.cta-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

.btn-cta {
    background: white;
    color: #667eea;
    padding: 16px 40px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* 子页面通用样式 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

.page-content {
    padding: 60px 0;
}

.module-section {
    margin-bottom: 60px;
}

.module-section h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.module-section h2 i {
    color: var(--primary-color);
}

.module-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.feature-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--bg-white);
    box-shadow: var(--shadow);
    border-radius: 8px;
    overflow: hidden;
}

.feature-table th,
.feature-table td {
    padding: 15px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.feature-table th {
    background: var(--bg-light);
    font-weight: 600;
    color: var(--text-primary);
}

.feature-table tr:last-child td {
    border-bottom: none;
}

.feature-table tr:hover {
    background: #f9fafb;
}

.workflow-steps {
    display: flex;
    justify-content: space-between;
    margin: 30px 0;
    position: relative;
}

.workflow-steps::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border-color);
}

.workflow-step {
    text-align: center;
    position: relative;
    z-index: 1;
    flex: 1;
}

.step-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    color: white;
    font-size: 24px;
}

.workflow-step h4 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.workflow-step p {
    font-size: 14px;
    color: var(--text-secondary);
}

.highlight-box {
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border-left: 4px solid var(--primary-color);
    padding: 20px 25px;
    border-radius: 8px;
    margin: 20px 0;
}

.highlight-box h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.highlight-box p {
    margin-bottom: 0;
}

/* 价格方案 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-white);
    border-radius: 16px;
    border: 2px solid #e8e8e8;
    padding: 32px 24px;
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.pricing-card.popular {
    border-color: #667eea;
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.2);
    transform: scale(1.05);
}

.pricing-card:hover {
    border-color: #667eea;
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.25);
    transform: translateY(-8px);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-8px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.pricing-header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 2px solid #f0f0f0;
}

.plan-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 16px;
}

.plan-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.plan-price .currency {
    font-size: 24px;
    color: #667eea;
    font-weight: 600;
}

.plan-price .amount {
    font-size: 48px;
    color: #667eea;
    font-weight: 700;
    line-height: 1;
}

.plan-price .period {
    font-size: 16px;
    color: var(--text-light);
    margin-left: 4px;
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    flex: 1;
}

.plan-features li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    border-bottom: 1px solid #f5f5f5;
}

.plan-features li:last-child {
    border-bottom: none;
}

.plan-features li i {
    color: var(--secondary-color);
    font-size: 18px;
    flex-shrink: 0;
    margin-top: 2px;
}

.plan-features li span {
    flex: 1;
}

.pricing-footer .plan-button {
    display: block;
    width: 100%;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.plan-button.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.plan-button.primary:hover {
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    transform: translateY(-2px);
}

.plan-button.default {
    background: var(--bg-white);
    color: #667eea;
    border: 2px solid #667eea;
}

.plan-button.default:hover {
    background: #667eea;
    color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-white);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        padding: 10px 0;
        gap: 0;
    }

    .nav-menu-open {
        display: flex;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: 12px 20px !important;
        border-bottom: 1px solid var(--bg-light);
    }

    .nav-menu a.active::after {
        display: none;
    }

    .nav-menu a.active {
        background: var(--bg-light);
    }

    .btn-login {
        margin: 10px 20px;
        text-align: center;
        justify-content: center;
        border-radius: 6px;
    }

    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .workflow-steps {
        flex-direction: column;
        gap: 20px;
    }
    
    .workflow-steps::before {
        display: none;
    }
}