/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: #4f46e5;
    font-size: 1.8rem;
    font-weight: bold;
}

.logo-img {
    height: 55px;
    width: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

.nav-menu a:hover {
    color: #4f46e5;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    color: white;
    padding-top: 80px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: bold;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    background: #ff6b6b;
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.cta-button:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 107, 107, 0.3);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 机器人图标样式 */
.ai-icon {
    font-size: 15rem;
    animation: float 3s ease-in-out infinite;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* CSS绘制的机器人样式 */
.css-robot {
    width: 240px;
    height: 280px;
    position: relative;
}

.robot-head {
    width: 120px;
    height: 100px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    margin: 0 auto 10px;
    position: relative;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.robot-antenna {
    width: 3px;
    height: 20px;
    background: #4f46e5;
    position: absolute;
    top: -20px;
    border-radius: 2px;
}

.robot-antenna.left {
    left: 30px;
}

.robot-antenna.right {
    right: 30px;
}

.robot-antenna::after {
    content: '';
    width: 8px;
    height: 8px;
    background: #ef4444;
    border-radius: 50%;
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
}

.robot-antenna.right::after {
    background: #10b981;
}

.robot-eyes {
    display: flex;
    justify-content: space-between;
    padding: 25px 20px 0;
}

.eye {
    width: 20px;
    height: 20px;
    background: #1e40af;
    border-radius: 50%;
    position: relative;
    animation: robotBlink 4s infinite;
}

.eye::after {
    content: '';
    width: 6px;
    height: 6px;
    background: #60a5fa;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.robot-mouth {
    width: 40px;
    height: 8px;
    background: #1e40af;
    border-radius: 4px;
    margin: 15px auto 0;
}

.robot-body {
    width: 100px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    margin: 0 auto;
    position: relative;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.robot-panel {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.panel-light {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    animation: panelBlink 2s infinite;
}

.panel-light.red {
    background: #ef4444;
    animation-delay: 0s;
}

.panel-light.green {
    background: #10b981;
    animation-delay: 0.5s;
}

.panel-light.blue {
    background: #3b82f6;
    animation-delay: 1s;
}

.robot-arms {
    position: absolute;
    top: 120px;
    width: 100%;
    display: flex;
    justify-content: space-between;
}

.arm {
    width: 40px;
    height: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    position: relative;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.left-arm {
    transform: translateX(-20px);
}

.right-arm {
    transform: translateX(20px);
}

.arm::after {
    content: '';
    width: 16px;
    height: 16px;
    background: #4f46e5;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.left-arm::after {
    left: -18px;
}

.right-arm::after {
    right: -18px;
}

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

@keyframes robotBlink {
    0%, 90%, 100% {
        transform: scaleY(1);
    }
    95% {
        transform: scaleY(0.1);
    }
}

@keyframes panelBlink {
    0%, 50%, 100% {
        opacity: 1;
        box-shadow: 0 0 10px currentColor;
    }
    25%, 75% {
        opacity: 0.3;
        box-shadow: none;
    }
}

/* 产品区域 */
.products {
    padding: 5rem 0;
    background: #f8fafc;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #2d3748;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.product-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2d3748;
}

.product-card p {
    color: #718096;
    line-height: 1.6;
}

/* 关于我们 */
.about {
    padding: 5rem 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #2d3748;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #4a5568;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: #f7fafc;
    border-radius: 10px;
}

.stat-item h3 {
    font-size: 2rem;
    color: #4f46e5;
    margin-bottom: 0.5rem;
}

.stat-item p {
    color: #718096;
    font-weight: 500;
}

/* 联系表单 */
.contact {
    padding: 5rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact .section-title {
    color: white;
}

.contact-subtitle {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group input {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.submit-button {
    width: 100%;
    background: #ff6b6b;
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
    margin-top: 1rem;
}

.submit-button:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 107, 107, 0.3);
}

/* 页脚 */
.footer {
    background: #2d3748;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #4f46e5;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
    color: #a0aec0;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4a5568;
    color: #a0aec0;
}

.footer-bottom p {
    margin-bottom: 0.5rem;
}

.footer-bottom a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: #4f46e5;
}

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

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 2rem;
    border-radius: 15px;
    width: 90%;
    max-width: 400px;
    text-align: center;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

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

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

.success-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.modal-content h3 {
    margin-bottom: 1rem;
    color: #2d3748;
}

.modal-content p {
    color: #718096;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #4f46e5;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1500;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: #3730a3;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

.back-to-top:active {
    transform: translateY(-1px);
}

.back-to-top svg {
    transition: transform 0.3s ease;
}

.back-to-top:hover svg {
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .logo-img {
        height: 45px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .ai-icon {
        font-size: 8rem;
    }

    .css-robot {
        width: 160px;
        height: 200px;
        transform: scale(0.8);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}