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

:root {
    --primary-color: #2563eb;
    --secondary-color: #0ea5e9;
    --accent-color: #10b981;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', 'Inter-fallback', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--light-color);
    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);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.nav-logo .tagline {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
    padding: 12px 16px;
    min-height: 44px;
    display: flex;
    align-items: center;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* 主要内容区域 */
main {
    margin-top: 80px;
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="white" opacity="0.1"/><circle cx="80" cy="80" r="2" fill="white" opacity="0.1"/><circle cx="50" cy="30" r="1" fill="white" opacity="0.2"/><circle cx="30" cy="70" r="1" fill="white" opacity="0.2"/></svg>');
    animation: float 20s infinite ease-in-out;
}

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

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
    padding: 0 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.investor-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    display: inline-block;
    margin-bottom: 1rem;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight {
    color: #fbbf24;
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.7;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #fbbf24;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

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

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    min-height: 48px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

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

.floating-cards {
    position: relative;
    width: 400px;
    height: 400px;
}

.card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 180px;
    height: 180px;
    will-change: transform;
    backface-visibility: hidden;
}

.card-1 {
    top: 10%;
    left: 2%;
    animation: float-1 6s infinite ease-in-out;
}

.card-2 {
    top: 10%;
    right: 2%;
    animation: float-2 8s infinite ease-in-out;
}

.card-3 {
    bottom: 2%;
    left: 2%;
    animation: float-3 7s infinite ease-in-out;
}

.card-4 {
    bottom: 2%;
    right: 2%;
    animation: float-4 9s infinite ease-in-out;
}

@keyframes float-1 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

@keyframes float-2 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes float-3 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

@keyframes float-4 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-18px); }
}

.card i {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

/* 核心定位 */
.core-positioning {
    padding: 4rem 0;
    background: white;
}

.positioning-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-xl);
}

.positioning-card h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.positioning-statement {
    font-size: 1.25rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.positioning-highlights {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.highlight-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.highlight-item i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* 双轨业务模式 */
.dual-track {
    padding: 4rem 0;
    background: var(--light-color);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.track-comparison {
    margin-bottom: 3rem;
}

.track-table {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.table-header {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1.5fr;
    background: var(--dark-color);
    color: white;
    font-weight: 600;
}

.header-cell {
    padding: 1.5rem;
    text-align: left;
}

.table-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1.5fr;
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
}

.table-row:last-child {
    border-bottom: none;
}

.cell {
    padding: 0 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.row-tag {
    background: var(--secondary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    width: fit-content;
}

.row-tag.growth {
    background: var(--accent-color);
}

.detailed-tracks {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.track-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.track-card:hover {
    transform: translateY(-4px);
}

.track-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.track-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.track-card.traditional .track-icon {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.track-card.future .track-icon {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-color);
}

.track-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.track-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    width: fit-content;
}

.track-tag.growth {
    background: var(--accent-color);
}

.track-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.detail-section h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

/* 技术优势 */
.technology {
    padding: 4rem 0;
    background: white;
}

.tech-advantages {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.advantage-card {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--light-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.advantage-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.3;
    line-height: 1;
}

.advantage-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.advantage-content p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.cloud-edge-collaboration {
    margin-top: 3rem;
}

.cloud-edge-collaboration h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
}

.collaboration-table {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: start;
    background: white;
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.col-header h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
}

.cloud-items,
.edge-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--light-color);
    border-radius: 8px;
}

.item i {
    color: var(--primary-color);
    margin-top: 2px;
}

.vs-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* 市场潜力 */
.market-potential {
    padding: 4rem 0;
    background: var(--light-color);
}

.market-drivers {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.driver-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.driver-card:hover {
    transform: translateY(-4px);
}

.driver-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.driver-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.driver-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.market-size {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.size-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.size-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* 组织架构 */
.organization {
    padding: 4rem 0;
    background: white;
}

.org-chart {
    max-width: 800px;
    margin: 0 auto;
}

.org-level {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.org-level.top {
    justify-content: center;
}

.org-level.middle {
    justify-content: center;
}

.org-level.bottom {
    justify-content: center;
    gap: 2rem;
}

.org-box {
    background: var(--light-color);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    min-width: 200px;
}

.org-box.main {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
    min-width: 300px;
}

.org-box h3,
.org-box h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.org-box.main h3 {
    font-size: 1.25rem;
}

.org-box p {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.org-box ul {
    list-style: none;
    font-size: 0.875rem;
}

.org-box.business {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.business-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    width: fit-content;
    margin: 0.5rem auto 0;
}

.business-tag.growth {
    background: var(--accent-color);
}

/* 投资者关系 */
.investors {
    padding: 4rem 0;
    background: var(--light-color);
}

.investment-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.highlight-section {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.highlight-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    text-align: center;
}

.funding-uses {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.use-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: 8px;
}

.use-percentage {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 80px;
    text-align: center;
}

.use-desc h4 {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.use-desc p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.core-advantages {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: 8px;
}

.advantage-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-top: 2px;
}

.advantage-item h4 {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.advantage-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.cta-section {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 16px;
}

.cta-section h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    opacity: 0.8;
    line-height: 1.6;
}

.link-group h4 {
    font-weight: 600;
    margin-bottom: 1rem;
}

.link-group a {
    display: block;
    color: white;
    text-decoration: none;
    opacity: 0.8;
    margin-bottom: 0.5rem;
    transition: opacity 0.3s ease;
}

.link-group a:hover {
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1rem;
    text-align: center;
    opacity: 0.6;
    font-size: 0.875rem;
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    margin: 10% auto;
    padding: 2rem;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: var(--shadow-xl);
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.contact-info {
    margin: 2rem 0;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--light-color);
    border-radius: 8px;
}

.contact-item i {
    color: var(--primary-color);
    width: 20px;
}

.contact-note {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    /* 移动端隐藏浮动卡片，避免布局干扰 */
    .floating-cards {
        display: none;
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

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

    .hero-visual {
        display: none;
    }

    .detailed-tracks {
        grid-template-columns: 1fr;
    }

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

    .market-drivers {
        grid-template-columns: 1fr;
    }

    .collaboration-table {
        grid-template-columns: 1fr;
    }

    .vs-divider {
        transform: rotate(90deg);
        margin: 1rem 0;
    }

    .investment-highlights {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .table-header,
    .table-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

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

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

    .positioning-highlights {
        flex-direction: column;
        gap: 1rem;
    }

    .org-level.middle {
        flex-direction: column;
        align-items: center;
    }

    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    /* 优化小屏幕统计布局 */
    .hero-stats {
        grid-template-columns: 1fr 1fr;
        gap: 0.8rem;
    }

    .stat-item {
        padding: 1rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

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

    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 1rem;
    }

    .hero-content,
    .core-positioning,
    .dual-track,
    .technology,
    .market-potential,
    .organization,
    .investors {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}