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

/* 根变量 */
:root {
    --primary-color: #0A84FF;
    --secondary-color: #FF9F0A;
    --success-color: #30D158;
    --bg-dark: #1C1C1E;
    --bg-darker: #0F0F11;
    --bg-light: #2C2C2E;
    --text-white: #FFFFFF;
    --text-gray: #8E8E93;
    --text-light-gray: #C7C7CC;
    --border-color: #3A3A3C;
    --gradient-primary: linear-gradient(135deg, #0A84FF 0%, #30D158 100%);
    --gradient-secondary: linear-gradient(135deg, #FF9F0A 0%, #FF6B35 100%);
    --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 40px rgba(0, 0, 0, 0.2);
    --shadow-heavy: 0 16px 60px rgba(0, 0, 0, 0.3);
    --border-radius: 12px;
    --border-radius-small: 8px;
    --transition: all 0.3s ease;
}

/* 基础样式 */
body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(28, 28, 30, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo .logo-text {
    font-family: 'Pacifico', cursive;
    font-size: 24px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    color: var(--text-white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-btn {
    background: var(--primary-color);
    color: var(--text-white);
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.nav-btn:hover {
    background: #007AFF;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-white);
    transition: var(--transition);
}

/* 首页横幅 */
.hero {
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.1) 0%, rgba(48, 209, 88, 0.1) 100%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 40px;
    line-height: 1.6;
}

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

.btn {
    padding: 16px 32px;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 16px;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-white);
}

.btn-primary:hover {
    background: #007AFF;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: transparent;
    color: var(--text-white);
    border: 2px solid var(--text-white);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

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

.hero-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    max-width: 300px;
    transition: var(--transition);
}

.hero-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.card-icon i {
    font-size: 32px;
    color: var(--text-white);
}

.hero-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-white);
}

.hero-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* 通用区块样式 */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* 产品展示 */
.products {
    padding: 100px 0;
    background: var(--bg-darker);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.product-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
}

.card-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--primary-color);
    color: var(--text-white);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    z-index: 2;
}

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

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.card-content {
    padding: 30px;
}

.card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-white);
}

.card-content p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* 技术优势 */
.technology {
    padding: 100px 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.tech-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.tech-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.tech-icon i {
    font-size: 32px;
    color: var(--text-white);
}

.tech-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-white);
}

.tech-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

.tech-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-gray);
    font-weight: 500;
}

/* 图表区域 */
.charts {
    padding: 100px 0;
    background: var(--bg-darker);
}

.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.chart {
    height: 400px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    padding: 20px;
}

.chart-info h3 {
    font-size: 1.75rem;
    margin-bottom: 30px;
    color: var(--text-white);
}

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

.tech-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    color: var(--text-gray);
    line-height: 1.6;
}

.tech-list li i {
    color: var(--primary-color);
    margin-right: 15px;
    margin-top: 4px;
    font-size: 1.125rem;
}

/* 应用案例 */
.cases {
    padding: 100px 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.case-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.case-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-white);
}

.case-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* 响应式视频样式 */
.case-video,
.demo-video {
    margin-top: 20px;
    border-radius: var(--border-radius-small);
    overflow: hidden;
}

.case-video video,
.demo-video video {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
    border-radius: var(--border-radius-small);
}

/* 响应式图片样式 */
.case-image {
    margin-top: 20px;
    border-radius: var(--border-radius-small);
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
    border-radius: var(--border-radius-small);
    object-fit: cover;
}

/* AI演示区域样式 */
.ai-demo {
    padding: 100px 0;
    background: var(--bg-darker);
}

.demo-container {
    margin-top: 40px;
}

.demo-grid {
    gap: 30px;
    align-items: flex-start;
}

.demo-video {
    flex: 1;
    min-width: 300px;
    max-width: 500px;
}

.demo-analysis {
    margin-top: 15px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-small);
    border: 1px solid var(--border-color);
}

.analysis-status {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.analysis-status i {
    color: var(--primary-color);
}

.analysis-progress {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    width: 60%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: progress 2s ease-in-out infinite;
}

@keyframes progress {
    0%, 100% { width: 30%; }
    50% { width: 80%; }
}

/* 定制化能力 */
.customization {
    padding: 100px 0;
    background: var(--bg-darker);
}

.custom-table {
    overflow-x: auto;
}

.custom-table table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.custom-table th,
.custom-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.custom-table th {
    background: rgba(10, 132, 255, 0.1);
    color: var(--text-white);
    font-weight: 600;
}

.custom-table td {
    color: var(--text-gray);
}

.custom-table tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* 合作方式 */
.cooperation {
    padding: 100px 0;
}

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

.coop-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
}

.coop-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.coop-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.coop-item h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-white);
}

.coop-item p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: var(--bg-darker);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-color);
}

.contact-item h4 {
    font-size: 1.25rem;
    margin-bottom: 5px;
    color: var(--text-white);
}

.contact-item p {
    color: var(--text-gray);
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
}

.contact-form h3 {
    font-size: 1.75rem;
    margin-bottom: 30px;
    color: var(--text-white);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-white);
    font-weight: 500;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.checkbox-item span {
    color: var(--text-gray);
}

.range-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.range-input {
    flex: 1;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.range-value {
    color: var(--primary-color);
    font-weight: 600;
    min-width: 30px;
}

textarea {
    width: 100%;
    height: 120px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 15px;
    color: var(--text-white);
    font-family: inherit;
    resize: vertical;
    outline: none;
    transition: var(--transition);
}

textarea:focus {
    border-color: var(--primary-color);
}

.char-count {
    display: block;
    text-align: right;
    margin-top: 5px;
    color: var(--text-gray);
    font-size: 0.875rem;
}

/* 页脚 */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

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

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 20px;
    color: var(--text-white);
}

.footer-section p,
.footer-section li {
    color: var(--text-gray);
    line-height: 1.6;
}

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

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

.footer-section ul li a {
    color: var(--text-gray);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-gray);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-dark);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 40px;
        transition: var(--transition);
        gap: 20px;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .charts-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .products-grid,
    .tech-grid,
    .cases-grid,
    .coop-grid {
        grid-template-columns: 1fr;
    }

    .tech-stats {
        grid-template-columns: 1fr;
    }

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

    /* 移动端视频响应式 */
    .demo-grid {
        flex-direction: column;
        align-items: center;
    }

    .demo-video {
        min-width: 100%;
        max-width: 100%;
    }

    .case-video,
    .demo-video {
        margin-top: 15px;
    }

    /* 移动端图片响应式 */
    .case-image {
        margin-top: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }

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

    .section-header h2 {
        font-size: 1.75rem;
    }

    .product-card,
    .tech-card,
    .case-card,
    .coop-item {
        padding: 30px;
    }

    /* 小屏幕视频响应式 */
    .case-video video,
    .demo-video video {
        border-radius: 8px;
    }

    .demo-analysis {
        padding: 12px;
        font-size: 0.85rem;
    }

    .analysis-status {
        font-size: 0.8rem;
    }

    /* 小屏幕图片响应式 */
    .case-image img {
        border-radius: 8px;
    }
}

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

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

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

::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}