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

:root {
    --primary-color: #3498db;
    --secondary-color: #9b59b6;
    --accent-color: #e74c3c;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --text-color: #333;
    --gradient-1: linear-gradient(135deg, #3498db, #9b59b6);
    --gradient-2: linear-gradient(135deg, #e74c3c, #f39c12);
    --gradient-3: linear-gradient(135deg, #1abc9c, #3498db);
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
    overflow-x: hidden;
}

.container {
    width: 1200px;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}

/* 标题样式 */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 15px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 50px;
}

.divider {
    width: 80px;
    height: 4px;
    background: var(--gradient-1);
    margin: 0 auto 20px;
    border-radius: 2px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: var(--gradient-2);
    color: #fff;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(231, 76, 60, 0.4);
}

/* 导航栏样式 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
    background: rgba(10, 14, 39, 0.85);
    backdrop-filter: blur(15px);
    box-shadow: 0 2px 30px rgba(52, 152, 219, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(52, 152, 219, 0.3);
}

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

.logo {
    position: relative;
    padding: 10px 20px;
    border-radius: 15px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.15) 0%, rgba(155, 89, 182, 0.15) 50%, rgba(231, 76, 60, 0.15) 100%);
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 20px rgba(52, 152, 219, 0.3),
                inset 0 0 30px rgba(52, 152, 219, 0.1),
                0 0 20px rgba(52, 152, 219, 0.2);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
    animation: logoGlow 4s ease-in-out infinite;
}

.logo::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.3) 0%, rgba(155, 89, 182, 0.2) 50%, transparent 70%);
    animation: logoRotate 8s linear infinite;
    z-index: 0;
}

.logo::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(52, 152, 219, 0.1) 0%, 
        transparent 25%,
        transparent 75%,
        rgba(155, 89, 182, 0.1) 100%);
    animation: logoScan 3s linear infinite;
    z-index: 1;
    pointer-events: none;
}

.logo:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 8px 30px rgba(52, 152, 219, 0.5),
                inset 0 0 40px rgba(52, 152, 219, 0.2),
                0 0 30px rgba(52, 152, 219, 0.4);
}

.logo:hover::before {
    animation: logoRotate 4s linear infinite;
}

.logo img {
    height: 50px;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 0 10px rgba(52, 152, 219, 0.5));
    transition: all 0.4s ease;
}

.logo:hover img {
    filter: drop-shadow(0 0 20px rgba(52, 152, 219, 0.8)) 
            drop-shadow(0 0 30px rgba(155, 89, 182, 0.6));
    transform: scale(1.05);
}

@keyframes logoGlow {
    0%, 100% {
        box-shadow: 0 5px 20px rgba(52, 152, 219, 0.3),
                    inset 0 0 30px rgba(52, 152, 219, 0.1),
                    0 0 20px rgba(52, 152, 219, 0.2);
    }
    50% {
        box-shadow: 0 5px 25px rgba(52, 152, 219, 0.4),
                    inset 0 0 35px rgba(52, 152, 219, 0.15),
                    0 0 30px rgba(52, 152, 219, 0.3);
    }
}

@keyframes logoRotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes logoScan {
    0% {
        transform: translateX(-100%) translateY(-100%);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateX(100%) translateY(100%);
        opacity: 0;
    }
}


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

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

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    position: relative;
    padding: 10px 20px;
    border-radius: 8px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-transform: uppercase;
    font-size: 0.9rem;
    background: transparent;
    border: 2px solid transparent;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.3), transparent);
    transition: left 0.5s;
    z-index: -1;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #3498db, #9b59b6, #e74c3c);
    transition: width 0.4s ease;
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.8);
}

.nav-link:hover {
    color: #fff;
    transform: translateY(-2px);
    border-color: rgba(52, 152, 219, 0.5);
    box-shadow: 0 5px 20px rgba(52, 152, 219, 0.4), inset 0 0 20px rgba(52, 152, 219, 0.1);
    background: rgba(52, 152, 219, 0.15);
}

.nav-link:hover::before {
    left: 100%;
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link.active {
    color: #fff;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.3), rgba(155, 89, 182, 0.3));
    border-color: rgba(52, 152, 219, 0.6);
    box-shadow: 0 5px 25px rgba(52, 152, 219, 0.5), inset 0 0 30px rgba(52, 152, 219, 0.2);
}

.nav-link.active::after {
    width: 80%;
    background: linear-gradient(90deg, #3498db, #9b59b6);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.menu-toggle:hover {
    color: #fff;
    border-color: rgba(52, 152, 219, 0.5);
    background: rgba(52, 152, 219, 0.15);
    box-shadow: 0 5px 20px rgba(52, 152, 219, 0.4);
}

/* 主页横幅样式 */
.hero {
    padding: 150px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 10px;
    height: 10px;
    background: rgba(52, 152, 219, 0.5);
    border-radius: 50%;
    animation: float 15s infinite linear;
}

.particle:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-duration: 12s;
    animation-delay: 0s;
}

.particle:nth-child(2) {
    top: 60%;
    left: 20%;
    animation-duration: 15s;
    animation-delay: 1s;
}

.particle:nth-child(3) {
    top: 40%;
    left: 70%;
    animation-duration: 10s;
    animation-delay: 2s;
}

.particle:nth-child(4) {
    top: 70%;
    left: 40%;
    animation-duration: 18s;
    animation-delay: 0s;
}

.particle:nth-child(5) {
    top: 20%;
    left: 60%;
    animation-duration: 13s;
    animation-delay: 1.5s;
}

.particle:nth-child(6) {
    top: 80%;
    left: 80%;
    animation-duration: 14s;
    animation-delay: 0.5s;
}

.particle:nth-child(7) {
    top: 30%;
    left: 30%;
    animation-duration: 16s;
    animation-delay: 2s;
}

.particle:nth-child(8) {
    top: 50%;
    left: 90%;
    animation-duration: 11s;
    animation-delay: 1s;
}

@keyframes float {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) translateX(50px);
        opacity: 0;
    }
}

.hero .container {
    display: flex;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    padding-right: 50px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 30px;
    color: #555;
}

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

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    animation: float-image 6s ease-in-out infinite;
}

@keyframes float-image {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0);
    }
}

/* 关于我们部分样式 */
.about {
    padding: 100px 0;
    background: #fff;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: #555;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.stats {
    display: flex;
    margin-top: 40px;
    gap: 30px;
}

.stat-item {
    flex: 1;
    text-align: center;
    padding: 20px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(52, 152, 219, 0.2);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

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

/* 产品中心样式 */
.products {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

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

.product-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

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

.product-image {
    height: 200px;
    overflow: hidden;
}

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

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

.product-content {
    padding: 25px;
}

.product-title {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.product-description {
    margin-bottom: 20px;
    color: #666;
    font-size: 0.95rem;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.product-btn {
    width: 100%;
}

/* 解决方案样式 */
.solutions {
    padding: 100px 0;
    background: #fff;
}

.solution-tabs {
    margin-top: 50px;
}

.tab-nav {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    border-bottom: 2px solid #eee;
}

.tab-btn {
    background: none;
    border: none;
    padding: 15px 25px;
    font-size: 1.1rem;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    position: relative;
    transition: color 0.3s ease;
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tab-btn.active::after {
    transform: scaleX(1);
}

.tab-content {
    min-height: 400px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.solution-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.solution-image {
    flex: 1;
}

.solution-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.solution-text {
    flex: 1;
}

.solution-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.solution-text p {
    margin-bottom: 20px;
    color: #555;
}

.solution-text ul {
    list-style: none;
    margin-bottom: 30px;
}

.solution-text li {
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
    color: #555;
}

.solution-text li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* AI助手样式 */
.ai-assistant {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.ai-chat-container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.chat-header {
    padding: 20px;
    background: var(--gradient-1);
    color: #fff;
    display: flex;
    align-items: center;
    gap: 15px;
}

.ai-avatar {
    width: 50px;
    height: 50px;
    background: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.ai-info h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.ai-info p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.chat-messages {
    height: 400px;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    display: flex;
    gap: 10px;
    max-width: 80%;
}

.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.user-message .message-avatar {
    background: var(--gradient-1);
    color: #fff;
}

.message-content {
    padding: 15px;
    border-radius: 15px;
    background: #f1f1f1;
}

.user-message .message-content {
    background: var(--gradient-1);
    color: #fff;
}

.chat-input-container {
    padding: 20px;
    border-top: 1px solid #eee;
}

.chat-input {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.chat-input input {
    flex: 1;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 30px;
    font-size: 1rem;
    outline: none;
}

.chat-input button, .send-btn {
    padding: 15px 25px;
    background: var(--gradient-1);
    color: #fff;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-input button:hover, .send-btn:hover {
    transform: scale(1.05);
}

.quick-questions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.quick-questions span {
    font-size: 0.9rem;
    color: #666;
}

.quick-question-btn {
    padding: 8px 15px;
    background: #f1f1f1;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quick-question-btn:hover {
    background: var(--gradient-1);
    color: #fff;
    transform: translateY(-2px);
}

/* 联系我们样式 */
.contact {
    padding: 100px 0;
    background: #fff;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-form {
    background: #f9f9f9;
    padding: 30px;
    border-radius: 15px;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.info-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.info-content h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.info-content p {
    color: #666;
}

.map {
    margin-top: 50px;
    border-radius: 15px;
    overflow: hidden;
    height: 400px;
}

.map iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* 页脚样式 */
.footer {
    padding: 50px 0 20px;
    background: var(--dark-color);
    color: #fff;
}

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

.footer-logo {
    position: relative;
    display: inline-block;
    padding: 15px 25px;
    border-radius: 15px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.15) 0%, rgba(155, 89, 182, 0.15) 50%, rgba(231, 76, 60, 0.15) 100%);
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 20px rgba(52, 152, 219, 0.3),
                inset 0 0 30px rgba(52, 152, 219, 0.1),
                0 0 20px rgba(52, 152, 219, 0.2);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
    animation: footerLogoGlow 4s ease-in-out infinite;
    margin-bottom: 20px;
}

.footer-logo::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.3) 0%, rgba(155, 89, 182, 0.2) 50%, transparent 70%);
    animation: footerLogoRotate 10s linear infinite;
    z-index: 0;
}

.footer-logo::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(52, 152, 219, 0.1) 0%, 
        transparent 25%,
        transparent 75%,
        rgba(155, 89, 182, 0.1) 100%);
    animation: footerLogoScan 4s linear infinite;
    z-index: 1;
    pointer-events: none;
}

.footer-logo:hover {
    transform: scale(1.05) translateY(-3px);
    box-shadow: 0 8px 30px rgba(52, 152, 219, 0.5),
                inset 0 0 40px rgba(52, 152, 219, 0.2),
                0 0 30px rgba(52, 152, 219, 0.4);
}

.footer-logo:hover::before {
    animation: footerLogoRotate 5s linear infinite;
}

.footer-logo img {
    height: 50px;
    margin-bottom: 0;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 0 10px rgba(52, 152, 219, 0.5));
    transition: all 0.4s ease;
}

.footer-logo:hover img {
    filter: drop-shadow(0 0 20px rgba(52, 152, 219, 0.8)) 
            drop-shadow(0 0 30px rgba(155, 89, 182, 0.6));
    transform: scale(1.05);
}

@keyframes footerLogoGlow {
    0%, 100% {
        box-shadow: 0 5px 20px rgba(52, 152, 219, 0.3),
                    inset 0 0 30px rgba(52, 152, 219, 0.1),
                    0 0 20px rgba(52, 152, 219, 0.2);
    }
    50% {
        box-shadow: 0 5px 25px rgba(52, 152, 219, 0.4),
                    inset 0 0 35px rgba(52, 152, 219, 0.15),
                    0 0 30px rgba(52, 152, 219, 0.3);
    }
}

@keyframes footerLogoRotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes footerLogoScan {
    0% {
        transform: translateX(-100%) translateY(-100%);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translateX(100%) translateY(100%);
        opacity: 0;
    }
}


.footer-logo p {
    color: #aaa;
    margin-bottom: 20px;
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--gradient-1);
    transform: translateY(-3px);
}

.footer-links h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--gradient-1);
}

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

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

.footer-links a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: #aaa;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: #fff;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    padding: 0;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 20px;
    background: var(--gradient-1);
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.close-modal {
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    color: #fff;
}

.modal-body {
    padding: 30px;
}

.modal-body p {
    margin-bottom: 20px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 响应式样式 */
@media (max-width: 992px) {
    .container {
        padding: 0 30px;
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 30px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-content,
    .solution-content,
    .contact-content {
        flex-direction: column;
    }

    .stats {
        justify-content: space-between;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: rgba(10, 14, 39, 0.95);
        backdrop-filter: blur(15px);
        box-shadow: 0 5px 30px rgba(52, 152, 219, 0.3);
        border-top: 1px solid rgba(52, 152, 219, 0.3);
        padding: 20px 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav ul {
        flex-direction: column;
        align-items: center;
    }

    .nav li {
        margin: 10px 0;
    }

    .menu-toggle {
        display: block;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

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

    .tab-nav {
        flex-wrap: wrap;
    }

    .tab-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
    }

    .stats {
        flex-direction: column;
        gap: 15px;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 20px;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .btn {
        width: 100%;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .solution-content {
        gap: 30px;
    }

    .chat-messages {
        height: 300px;
    }
}