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

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

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

/* 导航栏 */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: #4F46E5;
}

.navbar-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

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

.nav-link:hover {
    color: #4F46E5;
}

.btn-primary {
    background-color: #4F46E5;
    color: #fff;
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #4338CA;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #fff;
    color: #4F46E5;
    padding: 0.5rem 1.5rem;
    border: 1px solid #4F46E5;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: #F3F4F6;
    transform: translateY(-2px);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* 英雄区域 */
.hero {
    margin-top: 80px;
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.125rem;
    color: #64748B;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

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

.ai-animation {
    position: relative;
    width: 300px;
    height: 300px;
}

.animation-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: #4F46E5;
    border-radius: 50%;
    animation: float 3s ease-in-out infinite;
}

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

.particle:nth-child(2) {
    top: 20%;
    right: 20%;
    animation-delay: 0.5s;
}

.particle:nth-child(3) {
    bottom: 20%;
    left: 20%;
    animation-delay: 1s;
}

.particle:nth-child(4) {
    bottom: 20%;
    right: 20%;
    animation-delay: 1.5s;
}

.particle:nth-child(5) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translateY(-20px) scale(1.1);
        opacity: 0.7;
    }
}

/* 实时信息动态演示 */
.realtime-demo {
    padding: 4rem 0;
    background-color: #fff;
}

.realtime-demo h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1E293B;
}

.demo-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.demo-item {
    background-color: #f8fafc;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.demo-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.demo-icon {
    margin-bottom: 1rem;
}

.demo-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1E293B;
}

.demo-item p {
    color: #64748B;
}

/* 技术研究 */
.research {
    padding: 4rem 0;
    background-color: #f8fafc;
}

.research h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1E293B;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.research-card {
    background-color: #fff;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.card-icon {
    margin-bottom: 1rem;
}

.research-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1E293B;
}

.research-card p {
    color: #64748B;
    margin-bottom: 1.5rem;
}

.card-link {
    color: #4F46E5;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.card-link:hover {
    color: #4338CA;
}

/* 应用案例 */
.applications {
    padding: 4rem 0;
    background-color: #fff;
}

.applications h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1E293B;
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.application-card {
    background-color: #f8fafc;
    border-radius: 1rem;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.application-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.card-image {
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #cdd4f1;
}

.application-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 1.5rem 0.5rem;
    color: #1E293B;
}

.application-card p {
    color: #64748B;
    margin: 0 1.5rem 1.5rem;
}

/* 集成选项 */
.integration {
    padding: 4rem 0;
    background-color: #f8fafc;
}

.integration h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1E293B;
}

.integration-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.integration-card {
    background-color: #fff;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.integration-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.integration-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1E293B;
}

.integration-card p {
    color: #64748B;
}

/* 订阅等级 */
.subscription {
    padding: 4rem 0;
    background-color: #fff;
}

.subscription h2 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1E293B;
}

.subscription-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.subscription-card {
    background-color: #f8fafc;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.subscription-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.subscription-card.featured {
    background-color: #4F46E5;
    color: #fff;
    transform: scale(1.05);
}

.featured-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background-color: #F59E0B;
    color: #fff;
    padding: 0.25rem 1rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.subscription-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.subscription-card.featured h3 {
    color: #fff;
}

.price {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.price span {
    font-size: 1rem;
    font-weight: 400;
}

.subscription-card.featured .price {
    color: #fff;
}

.features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.features li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.features li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #4F46E5;
    font-weight: bold;
}

.subscription-card.featured .features li::before {
    color: #F59E0B;
}

.subscription-card.featured .btn-primary {
    background-color: #fff;
    color: #4F46E5;
}

.subscription-card.featured .btn-primary:hover {
    background-color: #f3f4f6;
}

/* 页脚 */
.footer {
    background-color: #1E293B;
    color: #fff;
    padding: 4rem 0 2rem;
}

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

.brand-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.footer-brand h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0;
}

.footer-brand p {
    color: #94A3B8;
    margin-bottom: 1rem;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #94A3B8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #fff;
}

.footer-contact p {
    color: #94A3B8;
    margin-bottom: 0.5rem;
}

/* 备案信息样式 */
.footer-beian {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.beian-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.beian-item img {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.beian-placeholder {
    width: 20px;
    height: 20px;
    display: inline-block;
}

.beian-item a {
    color: #94A3B8;
    font-size: 0.875rem;
    text-decoration: none;
    transition: color 0.3s ease;
}

.beian-item a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 2rem;
    text-align: center;
    color: #94A3B8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #fff;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .navbar-nav.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

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

    .ai-animation {
        width: 250px;
        height: 250px;
    }

    .realtime-demo h2,
    .research h2,
    .applications h2,
    .integration h2,
    .subscription h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0;
    }

    .hero-content h1 {
        font-size: 1.75rem;
    }

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }

    .ai-animation {
        width: 200px;
        height: 200px;
    }

    .demo-item,
    .research-card,
    .application-card,
    .integration-card,
    .subscription-card {
        padding: 1.5rem;
    }
}

/* 滚动动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 加载动画 */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}