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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 导航栏样式 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: #007bff;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.navbar-nav {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 20px;
}

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

.nav-link:hover {
    color: #007bff;
}

/* Hero区域样式 */
.hero {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 50px;
}

.hero-feature {
    margin: 0 20px;
    font-weight: 500;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #fff;
    color: #007bff;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 特性区域样式 */
.features {
    padding: 100px 0;
    background-color: #fff;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 20px;
    color: #333;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 50px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.feature-card {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: #007bff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: #fff;
    font-size: 1.5rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #333;
}

.feature-card p {
    color: #666;
}

/* 价格区域样式 */
.pricing {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.pricing-card {
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.pricing-header {
    padding: 30px;
    text-align: center;
    background-color: #007bff;
    color: #fff;
}

.pricing-header h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.pricing-period {
    font-size: 0.9rem;
    opacity: 0.8;
}

.pricing-features {
    padding: 30px;
}

.pricing-features ul {
    list-style: none;
}

.pricing-features li {
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
}

.pricing-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
}

.pricing-footer {
    padding: 0 30px 30px;
    text-align: center;
}

.pricing-card.popular {
    transform: scale(1.05);
}

.pricing-card.popular .pricing-header {
    background-color: #28a745;
}

/* 教程区域样式 */
.tutorial {
    padding: 100px 0;
    background-color: #fff;
}

.tutorial-steps {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-top: 50px;
}

.tutorial-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

.tutorial-step:not(:last-child):after {
    content: "";
    position: absolute;
    top: 30px;
    right: -50%;
    width: 100%;
    height: 2px;
    background-color: #e9ecef;
    z-index: 1;
}

.tutorial-step-number {
    width: 60px;
    height: 60px;
    background-color: #007bff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 20px;
    position: relative;
    z-index: 2;
}

.tutorial-step h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: #333;
}

.tutorial-step p {
    color: #666;
    font-size: 0.95rem;
}

/* 用户群体区域样式 */
.user-groups {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.user-groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.user-group-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.user-group-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #333;
    display: flex;
    align-items: center;
}

.user-group-card h3 i {
    margin-right: 10px;
    color: #007bff;
}

.user-group-card p {
    color: #666;
    line-height: 1.7;
}

/* 用户评价区域样式 */
.testimonials {
    padding: 100px 0;
    background-color: #fff;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.testimonial-card {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    position: relative;
}

.testimonial-card:before {
    content: """;
    position: absolute;
    top: 10px;
    left: 20px;
    font-size: 5rem;
    color: #007bff;
    opacity: 0.1;
    font-family: Georgia, serif;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 20px;
    color: #666;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    font-weight: 600;
    color: #333;
}

/* FAQ区域样式 */
.faq {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.faq-list {
    max-width: 800px;
    margin: 50px auto 0;
}

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

.faq-question {
    background-color: #fff;
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #f8f9fa;
}

.faq-question h3 {
    font-size: 1.1rem;
    color: #333;
}

.faq-answer {
    background-color: #fff;
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-answer.active {
    max-height: 200px;
    padding: 20px;
}

.faq-answer p {
    color: #666;
    line-height: 1.7;
}

/* CTA区域样式 */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: #fff;
    text-align: center;
}

.cta h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.cta p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta .btn {
    background-color: #fff;
    color: #007bff;
}

.cta .btn:hover {
    background-color: #f8f9fa;
}

/* 页脚样式 */
.footer {
    background-color: #343a40;
    color: #fff;
    padding: 50px 0 20px;
}

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

.footer-column h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #fff;
}

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

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

.footer-column ul li a {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #495057;
    color: #adb5bd;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
    }
    
    .navbar-nav {
        margin-top: 15px;
    }
    
    .nav-item {
        margin: 0 10px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .hero-features {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-feature {
        margin: 10px 0;
    }
    
    .tutorial-steps {
        flex-direction: column;
    }
    
    .tutorial-step:not(:last-child):after {
        display: none;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .features, .pricing, .tutorial, .user-groups, .testimonials, .faq, .cta {
        padding: 80px 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .pricing-card.popular {
        transform: none;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
}

/* 滚动动画 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #007bff;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0056b3;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 30px;
    height: 30px;
    border: 3px solid rgba(0, 123, 255, 0.3);
    border-radius: 50%;
    border-top-color: #007bff;
    animation: spin 1s ease-in-out infinite;
}

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

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -60px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid #ced4da;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 徽章样式 */
.badge {
    display: inline-block;
    padding: 5px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    color: #fff;
    background-color: #007bff;
    border-radius: 20px;
}

.badge-primary {
    background-color: #007bff;
}

.badge-success {
    background-color: #28a745;
}

.badge-warning {
    background-color: #ffc107;
}

.badge-danger {
    background-color: #dc3545;
}

/* 卡片样式 */
.card {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.card-header {
    padding: 20px;
    background-color: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 20px;
    background-color: #f8f9fa;
    border-top: 1px solid #e9ecef;
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.table th, .table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #333;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

/* 标签页样式 */
.tabs {
    display: flex;
    border-bottom: 1px solid #e9ecef;
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    border: none;
    background: none;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    transition: all 0.3s ease;
    position: relative;
}

.tab.active {
    color: #007bff;
}

.tab.active:after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #007bff;
}

.tab-content {
    display: none;
}

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

/* 折叠面板样式 */
.collapse {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.collapse.show {
    max-height: 1000px;
}

/* 轮播图样式 */
.carousel {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
}

.carousel-inner {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel-item {
    min-width: 100%;
}

.carousel-item img {
    width: 100%;
    height: auto;
}

.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.carousel-control:hover {
    background-color: rgba(255, 255, 255, 0.8);
}

.carousel-control-prev {
    left: 20px;
}

.carousel-control-next {
    right: 20px;
}

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    list-style: none;
}

.carousel-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    margin: 0 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.carousel-indicator.active {
    background-color: #fff;
}

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-dialog {
    background-color: #fff;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal.show .modal-dialog {
    transform: scale(1);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #666;
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: #333;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid #e9ecef;
    display: flex;
    justify-content: flex-end;
}

.modal-footer .btn {
    margin-left: 10px;
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    z-index: 1000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification-icon {
    margin-right: 15px;
    font-size: 1.2rem;
}

.notification-success .notification-icon {
    color: #28a745;
}

.notification-error .notification-icon {
    color: #dc3545;
}

.notification-warning .notification-icon {
    color: #ffc107;
}

.notification-info .notification-icon {
    color: #17a2b8;
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: 600;
    margin-bottom: 5px;
    color: #333;
}

.notification-message {
    font-size: 0.9rem;
    color: #666;
}

.notification-close {
    background: none;
    border: none;
    color: #666;
    cursor: pointer;
    margin-left: 15px;
    transition: color 0.3s ease;
}

.notification-close:hover {
    color: #333;
}

/* 骨架屏样式 */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }