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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --dark-bg: #0f172a;
    --dark-surface: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: 700;
}

.logo-icon {
    color: var(--primary-color);
    font-size: 28px;
}

.logo-text {
    color: var(--text-primary);
}

.logo-ai {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

.cta-button {
    background: var(--gradient-1);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(180deg, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.6) 50%, rgba(15, 23, 42, 0.85) 100%),
        url('images/hero-bg-1.png') center center / cover no-repeat;
    z-index: 0;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.25) 0%, transparent 50%);
    z-index: 1;
}

.hero-background::after {
    content: '';
    position: absolute;
    top: -20%;
    right: -5%;
    width: 50%;
    height: 100%;
    background: url('images/hero-bg-3.png') center center / contain no-repeat;
    opacity: 0.3;
    z-index: 2;
    animation: float-bg 20s ease-in-out infinite;
}

@keyframes float-bg {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.primary-button {
    background: var(--gradient-1);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.3s;
}

.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.4);
}

.primary-button.large {
    padding: 18px 48px;
    font-size: 18px;
}

.secondary-button {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
    padding: 14px 32px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.secondary-button:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.secondary-button.large {
    padding: 18px 48px;
    font-size: 18px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Section 通用样式 */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

/* 产品展示 */
.products {
    position: relative;
    background: var(--dark-surface);
    overflow: hidden;
}

.products::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: -10%;
    width: 50%;
    height: 80%;
    background: url('images/hero-bg-1.png') center center / contain no-repeat;
    opacity: 0.08;
    z-index: 0;
    transform: rotate(180deg);
}

.products .container {
    position: relative;
    z-index: 1;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.product-card {
    background: var(--dark-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.product-card.featured {
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--gradient-1);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.product-badge.new {
    background: var(--gradient-2);
}

.product-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.product-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.product-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.product-features {
    list-style: none;
    margin-bottom: 24px;
}

.product-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 24px;
}

.product-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.product-button {
    width: 100%;
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 12px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.product-button:hover {
    background: var(--primary-color);
    color: white;
}

/* 特性展示 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--dark-surface);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    transition: transform 0.3s, border-color 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

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

/* 解决方案 */
.solutions {
    background: var(--dark-surface);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.solution-card {
    background: var(--dark-bg);
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.solution-image {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.solution-content {
    padding: 24px;
}

.solution-content h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

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

/* 流程编排 */
.workflow {
    position: relative;
    background: var(--dark-bg);
    overflow: hidden;
}

.workflow::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -5%;
    width: 40%;
    height: 60%;
    background: url('images/hero-bg-2.png') center center / contain no-repeat;
    opacity: 0.12;
    z-index: 0;
    transform: translateY(-50%);
}

.workflow .container {
    position: relative;
    z-index: 1;
}

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

.workflow-description {
    color: var(--text-secondary);
    font-size: 18px;
    margin: 24px 0;
    line-height: 1.8;
}

.workflow-features {
    list-style: none;
    margin: 32px 0;
}

.workflow-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 16px;
}

.check-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--gradient-1);
    border-radius: 50%;
    color: white;
    font-weight: 700;
    font-size: 14px;
}

.workflow-visual {
    position: relative;
}

.workflow-demo {
    background: var(--dark-surface);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 60px 40px;
    position: relative;
}

.workflow-node {
    background: var(--dark-bg);
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    margin-bottom: 40px;
    animation: float 3s ease-in-out infinite;
}

.workflow-node:nth-child(2) {
    animation-delay: 0.5s;
}

.workflow-node:nth-child(4) {
    animation-delay: 1s;
}

.workflow-node:last-child {
    margin-bottom: 0;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.node-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.node-label {
    font-weight: 600;
    color: var(--text-primary);
}

.workflow-connector {
    width: 2px;
    height: 30px;
    background: var(--gradient-1);
    margin: 0 auto 10px;
    position: relative;
}

.workflow-connector::after {
    content: "▼";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--primary-color);
    font-size: 12px;
}

/* CTA Section */
.cta-section {
    background: var(--gradient-1);
    text-align: center;
    padding: 80px 0;
}

.cta-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.cta-section .primary-button {
    background: white;
    color: var(--primary-color);
}

.cta-section .primary-button:hover {
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.cta-section .secondary-button {
    border-color: white;
    color: white;
}

.cta-section .secondary-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Footer */
.footer {
    background: var(--dark-surface);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-section h4 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

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

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .section-title {
        font-size: 32px;
    }

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

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

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

    .cta-buttons {
        flex-direction: column;
    }
}