:root {
    --bg-color: #f0f9ff; /* 极浅的蓝白底 */
    --surface-color: rgba(255, 255, 255, 0.85); /* 白色半透明表面 */
    --surface-border: rgba(14, 165, 233, 0.25); /* 浅天蓝边框 */
    
    --primary-color: #0284c7; /* 科技深天蓝 */
    --primary-glow: rgba(2, 132, 199, 0.3);
    --secondary-color: #0ea5e9; /* 亮天蓝 */
    
    --text-primary: #0f172a; /* 深灰蓝，极佳的阅读对比度 */
    --text-secondary: #475569; /* 中灰蓝 */
    
    --font-main: 'Inter', sans-serif;
    --font-tech: 'Orbitron', sans-serif;
    
    --transition-standard: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 玻璃拟物化基础样式 */
.glass-effect {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(14, 165, 233, 0.1);
}

.glass-panel {
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--surface-border);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(14, 165, 233, 0.08); /* 柔和浅蓝阴影 */
}

/* 文字高亮 */
.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.glow-text {
    font-family: var(--font-tech);
    color: var(--text-primary);
}

/* 按钮样式 */
.btn-primary, .btn-secondary, .btn-outline {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-standard);
    cursor: pointer;
    font-family: var(--font-tech);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    box-shadow: 0 8px 25px rgba(2, 132, 199, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 10px 30px rgba(2, 132, 199, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background: rgba(2, 132, 199, 0.05);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition-standard);
}

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

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

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(2, 132, 199, 0.3);
    position: relative;
}

.logo-icon::after {
    content: '';
    position: absolute;
    inset: 4px;
    background: var(--bg-color);
    border-radius: 4px;
}

.logo-text {
    font-family: var(--font-tech);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--primary-color);
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-standard);
    font-size: 0.95rem;
}

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

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 800px;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
    animation: slowZoom 20s infinite alternate linear;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(240, 249, 255, 0.9) 0%, rgba(240, 249, 255, 0.6) 60%, rgba(240, 249, 255, 0.3) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4.5rem;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

/* Stats Section */
.stats-section {
    position: relative;
    z-index: 10;
    margin-top: -60px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    padding: 2.5rem;
    gap: 2rem;
    text-align: center;
}

.stat-item {
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -1rem;
    top: 15%;
    height: 70%;
    width: 1px;
    background: rgba(14, 165, 233, 0.15);
}

.stat-number {
    font-family: var(--font-tech);
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.stat-suffix {
    font-family: var(--font-tech);
    font-size: 2rem;
    color: var(--primary-color);
    display: inline-block;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.5rem;
    font-weight: 600;
}

/* Scenarios Section */
.scenarios-section {
    padding: 6rem 0 2rem;
}

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

.scenario-card {
    padding: 3.5rem 3rem;
    transition: var(--transition-standard);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.scenario-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary-color), var(--secondary-color), transparent);
    transform: translateX(-100%);
    transition: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.scenario-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.15);
    border-color: rgba(14, 165, 233, 0.4);
}

.scenario-card:hover::before {
    transform: translateX(100%);
}

.scenario-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
}

.scenario-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-family: var(--font-tech);
}

.scenario-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

/* Features Section */
.features-section {
    padding: 8rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-family: var(--font-tech);
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2.5rem 2rem;
    transition: var(--transition-standard);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), var(--secondary-color), transparent);
    transform: translateX(-100%);
    transition: 0.5s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(14, 165, 233, 0.15);
    border-color: rgba(14, 165, 233, 0.4);
}

.feature-card:hover::before {
    transform: translateX(100%);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* About Section */
.about-section {
    padding: 6rem 0 8rem 0;
    position: relative;
}

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

.about-text h2 {
    font-size: 2.5rem;
    font-family: var(--font-tech);
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.feature-list {
    list-style: none;
    margin-bottom: 2.5rem;
}

.feature-list li {
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 1rem;
    font-weight: 500;
}

.feature-list li::before {
    content: '▶';
    color: var(--primary-color);
    font-size: 0.8rem;
}

.about-image {
    padding: 1rem;
    position: relative;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
    box-shadow: 0 20px 50px rgba(14, 165, 233, 0.15);
}

/* Footer */
.footer {
    background: #ffffff;
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(14, 165, 233, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
}

.footer-contact h4 {
    font-family: var(--font-tech);
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.footer-contact p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(14, 165, 233, 0.1);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Animations */
@keyframes slowZoom {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    .stat-item:nth-child(2)::after {
        display: none;
    }
    .about-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }
    .nav-links {
        display: none;
    }
    .hero-actions {
        flex-direction: column;
    }
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .stat-item::after {
        display: none !important;
    }
    .hero-overlay {
        background: linear-gradient(to bottom, rgba(240, 249, 255, 0.85) 0%, rgba(240, 249, 255, 1) 100%);
    }
}