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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    -webkit-overflow-scrolling: touch;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.logo h1 {
    font-size: 28px;
    color: #007bff;
    font-weight: 700;
    letter-spacing: 1px;
}

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

.nav-links li {
    margin-left: 35px;
}

.nav-btn {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 20px;
    text-decoration: none;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    background-color: #fff;
}

.nav-btn:hover {
    color: #007bff;
    border-color: #007bff;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.1);
}

.nav-btn.primary {
    background-color: #007bff;
    color: #fff;
    border-color: #007bff;
}

.nav-btn.primary:hover {
    background-color: #0069d9;
    border-color: #0069d9;
    color: #fff;
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.2);
}

.mobile-menu {
    display: none;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 5px 0;
    transition: all 0.3s ease;
}

.mobile-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* 英雄区 */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -1;
    animation: heroBackgroundEffect 20s ease-in-out infinite;
}

@keyframes heroBackgroundEffect {
    0% {
        transform: scale(1.05);
        opacity: 0.8;
        filter: brightness(0.9);
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
        filter: brightness(1.1);
    }
    100% {
        transform: scale(1.05);
        opacity: 0.8;
        filter: brightness(0.9);
    }
}

/* 添加背景图片的暗化效果，确保文字清晰可见 */
.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
    max-width: 800px;
    padding: 0 20px;
    animation: fadeInUp 1s ease-out;
}

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

.hero-content h2 {
    font-size: 52px;
    margin-bottom: 25px;
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
    font-weight: 700;
    line-height: 1.2;
}

.hero-content p {
    font-size: 22px;
    margin-bottom: 45px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn.primary {
    background-color: #007bff;
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}

.btn.primary:hover {
    background-color: #0069d9;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.btn.secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid #fff;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

.btn.secondary:hover {
    background-color: rgba(255,255,255,0.1);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
}

.btn.small {
    padding: 10px 20px;
    font-size: 14px;
    border-radius: 40px;
}

/* 产品展示 */
.products {
    padding: 120px 0;
    background-color: #f8f9fa;
    position: relative;
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, rgba(102, 126, 234, 0.1), transparent);
}

.section-title {
    text-align: center;
    font-size: 40px;
    margin-bottom: 20px;
    color: #333;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    margin-bottom: 80px;
    color: #666;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.product-card {
    background-color: #fff;
    padding: 50px 30px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.12);
}

.product-icon {
    font-size: 64px;
    margin-bottom: 25px;
    transition: transform 0.3s ease;
}

.product-card:hover .product-icon {
    transform: scale(1.1);
}

.product-card h3 {
    font-size: 26px;
    margin-bottom: 20px;
    color: #333;
    font-weight: 600;
}

.product-card p {
    margin-bottom: 30px;
    color: #666;
    line-height: 1.7;
}

/* 功能介绍 */
.features {
    padding: 120px 0;
    background-color: #fff;
}

.features-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 50px;
}

.feature-section {
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-section:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

.feature-section h3 {
    font-size: 24px;
    margin-bottom: 25px;
    color: #333;
    font-weight: 600;
    position: relative;
    padding-bottom: 15px;
}

.feature-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: #007bff;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    margin-bottom: 18px;
    padding-left: 30px;
    position: relative;
    color: #666;
    line-height: 1.6;
    transition: color 0.3s ease;
}

.feature-list li:hover {
    color: #333;
}

.feature-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #007bff;
    font-weight: bold;
    font-size: 18px;
    background-color: #e3f2fd;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
}

/* 客户案例 */
.cases {
    padding: 120px 0;
    background-color: #f8f9fa;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.case-card {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    position: relative;
}

.case-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.12);
}

.case-image {
    position: relative;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.05);
}

.case-card h3 {
    font-size: 22px;
    margin: 25px;
    color: #333;
    font-weight: 600;
}

.case-card p {
    margin: 0 25px 25px;
    color: #666;
    line-height: 1.7;
}

/* 常见问题 */
.faq {
    padding: 120px 0;
    background-color: #fff;
}

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

.faq-item {
    margin-bottom: 20px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    background-color: #f8f9fa;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background-color: #e3f2fd;
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin: 0;
}

.faq-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: #007bff;
    color: #fff;
    transition: all 0.3s ease;
}

.faq-toggle i {
    font-size: 14px;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle i {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px 25px;
    max-height: 200px;
}

.faq-answer p {
    margin: 0;
    color: #666;
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    padding: 120px 0;
    background-color: #fff;
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, rgba(102, 126, 234, 0.1), transparent);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 60px;
}

.contact-info {
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #333;
    font-weight: 600;
}

.contact-info p {
    margin-bottom: 20px;
    font-size: 16px;
    color: #666;
    display: flex;
    align-items: center;
}

.contact-info p i {
    margin-right: 15px;
    color: #007bff;
    font-size: 20px;
}

.contact-info .wechat-qr {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
    text-align: center;
}

.contact-info .wechat-qr h4 {
    font-size: 16px;
    margin-bottom: 15px;
    color: #333;
}

.contact-info .wechat-qr img {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: inline-block;
}

.contact-form {
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.contact-form h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #333;
    font-weight: 600;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background-color: #fff;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 180px;
}

.contact-form button {
    width: 100%;
    padding: 15px;
    font-size: 16px;
    font-weight: 600;
}

/* 页脚 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 60px 0 30px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

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

.footer-info {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
    letter-spacing: 1px;
}

.footer-description {
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 25px;
    font-size: 14px;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background-color: #007bff;
    transform: translateY(-3px);
}

.footer-nav h4,
.footer-contact h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
    font-weight: 600;
    position: relative;
    padding-bottom: 10px;
}

.footer-nav h4::after,
.footer-contact h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: #007bff;
}

.footer-nav ul,
.footer-contact ul {
    list-style: none;
}

.footer-nav li,
.footer-contact li {
    margin-bottom: 12px;
}

.footer-nav a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 14px;
}

.footer-nav a:hover {
    color: #007bff;
    padding-left: 5px;
}

.footer-contact li {
    color: #ccc;
    display: flex;
    align-items: center;
    font-size: 14px;
}

.footer-contact li i {
    margin-right: 10px;
    color: #007bff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 14px;
    color: #ccc;
}

/* 悬浮按钮 */
.floating-button {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #0066cc;
    color: white;
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    font-size: 24px;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s ease;
}

.floating-button:hover {
    background-color: #0052a3;
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 30px;
    border: 1px solid #888;
    width: 80%;
    max-width: 400px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    animation: modalFadeIn 0.3s ease;
}

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

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: 10px;
    right: 15px;
}

.close:hover {
    color: #000;
}

.qrcode-container {
    margin: 20px 0;
    display: flex;
    justify-content: center;
}

.qrcode-container img {
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 优化移动端缩放 */
    html {
        font-size: 15px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    /* 优化移动端触摸体验 */
    button, a {
        -webkit-tap-highlight-color: rgba(0,0,0,0);
    }
    
    /* 确保所有元素在移动设备上正确缩放 */
    img, video {
        max-width: 100%;
        height: auto;
    }
    
    /* 优化表单元素在移动设备上的显示 */
    input, textarea, select {
        font-size: 16px;
        width: 100%;
    }
    
    /* 在移动端隐藏悬浮按钮 */
    .floating-button {
        display: none;
    }
    
    /* 优化移动端底部导航栏 */
    .mobile-bottom-nav {
        padding: 4px 0;
        height: 50px;
    }
    
    .nav-item i {
        font-size: 15px;
    }
    
    .nav-item span {
        font-size: 9px;
    }
    
    /* 进一步优化移动端布局 */
    .hero {
        min-height: 70vh;
    }
    
    .product-card,
    .feature-section,
    .case-card,
    .contact-info,
    .contact-form {
        margin-bottom: 15px;
    }
    
    /* 优化移动端间距 */
    h2 {
        margin-bottom: 15px;
    }
    
    p {
        margin-bottom: 15px;
    }
    
    /* 导航栏响应式设计 */
    .navbar {
        height: 50px;
    }
    
    .navbar .container {
        padding: 8px 15px;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    .mobile-menu {
        font-size: 20px;
    }
    
    .nav-links {
        position: fixed;
        top: 50px;
        left: 0;
        right: 0;
        background-color: #fff;
        flex-direction: column;
        align-items: center;
        padding: 15px 0;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 1000;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-links li {
        margin: 10px 0;
    }

    .nav-links .nav-btn {
        display: block;
        width: 80%;
        max-width: 200px;
        text-align: center;
        margin: 5px auto;
    }

    .mobile-menu {
        display: block;
    }

    /* 英雄区响应式设计 */
    .hero {
        background-image: url('images/hero-bg-mobile.jpg');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
    }
    
    .hero-content h2 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 18px;
    }

    /* 通用部分响应式设计 */
    .section-title {
        font-size: 32px;
    }

    .section-subtitle {
        font-size: 16px;
        margin-bottom: 60px;
    }

    .products,
    .features,
    .cases,
    .contact {
        padding: 80px 0;
    }

    .products-grid,
    .features-content,
    .cases-grid,
    .contact-content {
        gap: 30px;
    }

    .product-card,
    .feature-section,
    .case-card,
    .contact-info,
    .contact-form {
        padding: 30px;
    }
    
    /* Footer 响应式设计 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-nav,
    .footer-contact {
        margin-top: 20px;
    }
    
    .footer-nav h4::after,
    .footer-contact h4::after {
        left: 0;
    }
}

@media (max-width: 480px) {
    /* 进一步优化小屏幕设备 */
    html {
        font-size: 13px;
    }
    
    .container {
        padding: 0 8px;
    }
    
    /* 英雄区优化 */
    .hero-content h2 {
        font-size: 24px;
        line-height: 1.2;
    }

    .hero-content p {
        font-size: 14px;
        line-height: 1.4;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 220px;
        text-align: center;
        font-size: 14px;
        padding: 12px 20px;
    }

    /* 通用部分优化 */
    .section-title {
        font-size: 24px;
        line-height: 1.2;
    }

    .section-subtitle {
        font-size: 13px;
        margin-bottom: 40px;
    }

    .products,
    .features,
    .cases,
    .contact {
        padding: 50px 0;
    }

    .product-card,
    .feature-section,
    .case-card,
    .contact-info,
    .contact-form {
        padding: 20px;
    }
    
    .product-card h3,
    .feature-section h3,
    .case-card h3 {
        font-size: 18px;
    }
    
    .product-card p,
    .case-card p {
        font-size: 13px;
    }
    
    .feature-list li {
        font-size: 13px;
        padding: 8px 0;
    }
    
    /* 优化移动端底部导航栏 */
    .mobile-bottom-nav {
        padding: 4px 0;
        height: 50px;
    }
    
    .nav-item i {
        font-size: 15px;
    }
    
    .nav-item span {
        font-size: 9px;
    }
    
    /* 进一步优化移动端布局 */
    .hero {
        min-height: 70vh;
    }
    
    .product-card,
    .feature-section,
    .case-card,
    .contact-info,
    .contact-form {
        margin-bottom: 15px;
    }
    
    /* 优化移动端间距 */
    h2 {
        margin-bottom: 15px;
    }
    
    p {
        margin-bottom: 15px;
    }
    
    /* 优化悬浮按钮 */
    .floating-button {
        width: 50px;
        height: 50px;
        font-size: 20px;
        bottom: 65px;
    }
    
    /* 优化弹窗 */
    .modal-content {
        width: 95%;
        padding: 15px;
    }
    
    .modal-content h3 {
        font-size: 18px;
    }
    
    .modal-content p {
        font-size: 13px;
    }
    
    .qrcode-container img {
        width: 160px;
        height: 160px;
    }
    
    /* 优化联系表单 */
    .form-group label {
        font-size: 13px;
    }
    
    .form-group input,
    .form-group textarea {
        font-size: 14px;
        padding: 10px;
    }
    
    /* 优化页脚 */
    .footer-content {
        gap: 20px;
    }
    
    .footer-about h3 {
        font-size: 18px;
    }
    
    .footer-about p,
    .footer-nav li a,
    .footer-contact li {
        font-size: 13px;
    }
    
    .footer-bottom p {
        font-size: 11px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: #0069d9;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    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); }
}

/* 移动端底部导航栏 */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #fff;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 10px 0;
    z-index: 999;
    display: none;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #666;
    transition: all 0.3s ease;
    flex: 1;
    padding: 10px 0;
}

.nav-item i {
    font-size: 20px;
    margin-bottom: 5px;
}

.nav-item span {
    font-size: 12px;
}

.nav-item:hover,
.nav-item.active {
    color: #007bff;
}

/* 工具类 */
.text-center {
    text-align: center;
}

.mt-10 {
    margin-top: 10px;
}

.mt-20 {
    margin-top: 20px;
}

.mt-30 {
    margin-top: 30px;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-30 {
    margin-bottom: 30px;
}

/* 响应式设计 - 显示移动端底部导航栏 */
@media (max-width: 768px) {
    .mobile-bottom-nav {
        display: flex;
    }
    
    /* 为移动端添加底部padding，避免内容被导航栏遮挡 */
    body {
        padding-bottom: 70px;
    }
}