:root {
    --color-primary: #165DFF;
    --color-success: #00C48C;
    --color-neon: #00FFE0;
    --color-bg: #FFFFFF;
    --color-text: #1D2129;
    --color-text-secondary: #4E5969;
    --color-border: #E5E6EB;
    
    --gradient-primary: linear-gradient(135deg, #165DFF 0%, #00C48C 100%);
    --gradient-soft: linear-gradient(135deg, #E8F3FF 0%, #E8FFF7 100%);
    --gradient-neon: linear-gradient(135deg, #00C48C 0%, #00FFE0 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    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 {
    font-size: 28px;
}

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

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--color-text);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(22, 93, 255, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* Hero 区域 */
.hero {
    padding: 140px 0 80px;
    background: var(--gradient-soft);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

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

.hero-stats {
    display: flex;
    gap: 40px;
    align-items: center;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: var(--color-border);
}

/* AI 视觉效果 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai-visual {
    position: relative;
    width: 400px;
    height: 400px;
}

.ai-circle {
    position: absolute;
    border-radius: 50%;
    animation: pulse 3s infinite;
}

.circle-1 {
    width: 400px;
    height: 400px;
    border: 2px solid rgba(22, 93, 255, 0.1);
    top: 0;
    left: 0;
}

.circle-2 {
    width: 300px;
    height: 300px;
    border: 2px solid rgba(0, 196, 140, 0.2);
    top: 50px;
    left: 50px;
    animation-delay: 1s;
}

.circle-3 {
    width: 200px;
    height: 200px;
    border: 2px solid rgba(0, 255, 224, 0.3);
    top: 100px;
    left: 100px;
    animation-delay: 2s;
}

.ai-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: 800;
    color: white;
    box-shadow: 0 20px 60px rgba(22, 93, 255, 0.4);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

/* 产品特性区域 */
.features {
    padding: 100px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    padding: 40px 32px;
    background: white;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(22, 93, 255, 0.12);
    border-color: var(--color-primary);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-desc {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* 解决方案区域 */
.solutions {
    padding: 100px 0;
    background: var(--gradient-soft);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.solution-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.solution-card:hover::before {
    transform: scaleX(1);
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(22, 93, 255, 0.12);
}

.solution-number {
    font-size: 56px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    margin-bottom: 8px;
}

.solution-title {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

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

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

/* 关于我们区域 */
.about {
    padding: 100px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 24px;
}

.about-desc {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-values {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.value-item {
    display: flex;
    gap: 12px;
    padding: 16px;
    background: var(--gradient-soft);
    border-radius: 8px;
}

.value-item strong {
    color: var(--color-primary);
    min-width: 70px;
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.tech-item {
    padding: 16px 24px;
    background: var(--gradient-soft);
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.tech-item:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

/* 联系我们区域 */
.contact {
    padding: 100px 0;
    background: var(--gradient-soft);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    background: white;
    padding: 60px;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.contact-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-subtitle {
    color: var(--color-text-secondary);
    margin-bottom: 40px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: start;
}

.contact-icon {
    font-size: 28px;
}

.contact-item strong {
    display: block;
    margin-bottom: 4px;
}

.contact-item a {
    color: var(--color-primary);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
}

/* 页脚 */
.footer {
    background: #1D2129;
    color: #86909C;
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-logo-text {
    color: white;
}

.footer-desc {
    color: #86909C;
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-column h4 {
    color: #C9CDD4;
    font-size: 16px;
    margin-bottom: 20px;
}

.footer-column a {
    display: block;
    color: #86909C;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--color-neon);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    font-size: 14px;
}

.license-info {
    display: flex;
    gap: 8px;
    align-items: center;
}

.license-info a {
    color: #86909C;
    text-decoration: none;
    transition: color 0.3s ease;
}

.license-info a:hover {
    color: var(--color-neon);
}

.separator {
    color: #4E5969;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

    .hero-image {
        order: -1;
    }

    .ai-visual {
        width: 300px;
        height: 300px;
    }

    .circle-1 {
        width: 300px;
        height: 300px;
    }

    .circle-2 {
        width: 220px;
        height: 220px;
        top: 40px;
        left: 40px;
    }

    .circle-3 {
        width: 140px;
        height: 140px;
        top: 80px;
        left: 80px;
    }

    .ai-center {
        width: 90px;
        height: 90px;
        font-size: 28px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-content,
    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 24px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
    }

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

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 38px;
    }

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

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

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

    .contact-wrapper {
        padding: 32px 24px;
    }

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

    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .mobile-hide {
        display: none;
    }
}