:root {
    /* 颜色变量 */
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --primary: #6366f1; /* Indigo 500 */
    --primary-glow: rgba(99, 102, 241, 0.5);
    --secondary: #8b5cf6; /* Violet 500 */
    --accent: #22d3ee; /* Cyan 400 */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.15);
    
    /* 尺寸变量 */
    --container-width: 1200px;
    --header-height: 80px;
    --radius-lg: 24px;
    --radius-md: 16px;
    
    /* 动画 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.08), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.08), transparent 25%);
}

/* 通用样式 */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--glass-highlight);
    color: var(--text-main);
}

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

.section {
    padding: 100px 0;
    position: relative;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.125rem;
}

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

.grid {
    display: grid;
    gap: 32px;
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    height: var(--header-height);
    transition: var(--transition);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    background: rgba(15, 23, 42, 0.8);
    border-bottom: 1px solid var(--glass-border);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.5rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-muted);
    font-weight: 500;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-main);
    transition: var(--transition);
}

/* Hero区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.15), transparent 50%);
    z-index: -1;
}

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

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent), var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradient-move 5s ease infinite;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.7;
    animation: bounce 2s infinite;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 20px;
    display: block;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--text-main);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
}

/* 卡片样式 */
.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--glass-highlight);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 24px;
    background: rgba(255, 255, 255, 0.05);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--text-main);
}

.card-text {
    color: var(--text-muted);
}

/* 业务板块 */
.business-grid {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.business-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.business-card:nth-child(even) {
    direction: rtl;
}

.business-card:nth-child(even) .business-content {
    direction: ltr;
}

.business-content {
    padding: 40px;
}

.business-title {
    font-size: 2rem;
    margin-bottom: 16px;
    color: var(--text-main);
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(34, 211, 238, 0.1);
    color: var(--accent);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.business-desc {
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 1.125rem;
}

.business-list {
    list-style: disc;
    padding-left: 20px;
    color: var(--text-muted);
}

.business-list li {
    margin-bottom: 8px;
}

.business-visual {
    height: 100%;
    min-height: 300px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    position: relative;
}

/* 简单的视觉占位符 */
.visual-1::before { content: 'ERP / CRM / OA'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: var(--primary); font-weight: 700; opacity: 0.5; }
.visual-2::before { content: 'AI & Big Data'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: var(--secondary); font-weight: 700; opacity: 0.5; }
.visual-3::before { content: 'LeapGo Tech'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: var(--accent); font-weight: 700; opacity: 0.5; }
.visual-4::before { content: 'IoT & Hardware'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: var(--text-muted); font-weight: 700; opacity: 0.5; }

/* 技术实力 */
.stat-card {
    text-align: center;
    padding: 40px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 8px;
    line-height: 1;
}

.stat-label {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.stat-desc {
    color: var(--text-muted);
}

/* 企业文化 */
.culture-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.culture-quote {
    font-size: 1.5rem;
    font-style: italic;
    color: var(--text-main);
    margin-bottom: 40px;
    border-left: 4px solid var(--primary);
    padding-left: 20px;
}

.value-item {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
}

.value-icon {
    font-size: 2rem;
    background: rgba(255, 255, 255, 0.05);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    flex-shrink: 0;
}

.culture-image {
    height: 400px;
    background: var(--glass-bg);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.abstract-shape {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: linear-gradient(45deg, var(--primary), var(--accent));
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    filter: blur(40px);
    animation: morph 8s ease-in-out infinite;
}

/* 页脚 */
.footer {
    background: var(--bg-darker);
    padding: 80px 0 40px;
    border-top: 1px solid var(--glass-border);
}

.footer-cta {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.footer-title {
    font-size: 2.5rem;
    margin-bottom: 24px;
}

.footer-desc {
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 1.125rem;
}

.footer-divider {
    height: 1px;
    background: var(--glass-border);
    margin-bottom: 40px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    color: var(--text-muted);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 16px;
}

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

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

.fade-in {
    opacity: 0;
    transition: opacity 1s ease;
}

.fade-in.visible {
    opacity: 1;
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }

@keyframes gradient-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-10px) translateX(-50%); }
    60% { transform: translateY(-5px) translateX(-50%); }
}

@keyframes morph {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    50% { border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; }
    100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
}

/* 响应式 */
@media (max-width: 768px) {
    .section-title { font-size: 2rem; }
    .hero-title { font-size: 2.5rem; }
    
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        padding: 24px;
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
        border-bottom: 1px solid var(--glass-border);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .business-card {
        grid-template-columns: 1fr;
    }
    
    .business-card:nth-child(even) {
        direction: ltr;
    }
    
    .culture-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 24px;
        text-align: center;
        align-items: center;
    }
}