/* 全局样式 */
:root {
    --primary-color: #6366f1; --primary-dark: #4f46e5; --primary-light: #818cf8; --secondary-color: #0ea5e9; --accent-color: #f59e0b; --background-dark: #0f172a; 
    --background-light: #1e293b; --text-primary: #f8fafc; --text-secondary: #94a3b8; --text-muted: #64748b; --border-color: #334155; --card-bg: #1e293b; --gradient-1: 
    linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); --gradient-2: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%); --gradient-3: linear-gradient(135deg, #f59e0b 
    0%, #f97316 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);
}
* { margin: 0; padding: 0; box-sizing: border-box;
}
html { scroll-behavior: smooth;
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif; background-color: var(--background-dark); 
    color: var(--text-primary); line-height: 1.6; overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px;
}
/* 导航栏 */ .navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(15, 23, 42, 0.95); backdrop-filter: blur(10px); border-bottom: 
    1px solid var(--border-color); transition: all 0.3s ease;
}
.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; height: 70px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 24px; font-weight: 700; color: var(--text-primary);
}
.logo-icon { font-size: 32px;
}
.nav-menu { display: flex; list-style: none; gap: 30px;
}
.nav-menu a { color: var(--text-secondary); text-decoration: none; font-weight: 500; transition: color 0.3s ease; position: relative;
}
.nav-menu a:hover { color: var(--primary-color);
}
.nav-menu a::after { content: ''; position: absolute; bottom: -5px; left: 0; width: 0; height: 2px; background: var(--gradient-1); transition: width 0.3s ease;
}
.nav-menu a:hover::after { width: 100%;
}
.nav-actions { display: flex; align-items: center; gap: 15px;
}
.lang-switch { background: transparent; border: 1px solid var(--border-color); color: var(--text-secondary); padding: 8px 16px; border-radius: 6px; cursor: pointer; 
    font-weight: 500; transition: all 0.3s ease;
}
.lang-switch:hover { background: var(--primary-color); border-color: var(--primary-color); color: var(--text-primary);
}
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer;
}
.hamburger span { width: 25px; height: 3px; background: var(--text-primary); border-radius: 3px; transition: all 0.3s ease;
}
/* 按钮样式 */ .btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border-radius: 8px; font-weight: 600; text-decoration: none; 
    transition: all 0.3s ease; cursor: pointer; border: none; font-size: 14px;
}
.btn-primary { background: var(--gradient-1); color: var(--text-primary); box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}
.btn-secondary { background: transparent; color: var(--text-primary); border: 2px solid var(--border-color);
}
.btn-secondary:hover { background: var(--background-light); border-color: var(--primary-color);
}
.btn-outline { background: transparent; color: var(--primary-color); border: 2px solid var(--primary-color);
}
.btn-outline:hover { background: var(--primary-color); color: var(--text-primary);
}
.btn-large { padding: 16px 32px; font-size: 16px;
}
.btn-block { width: 100%; justify-content: center;
}
/* Hero区域 */ .hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: 70px; overflow: hidden;
}
.hero-background { position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 0;
}
.gradient-orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.3; animation: float 20s infinite ease-in-out;
}
.orb-1 { width: 600px; height: 600px; background: var(--primary-color); top: -200px; right: -200px; animation-delay: 0s;
}
.orb-2 { width: 500px; height: 500px; background: var(--secondary-color); bottom: -150px; left: -150px; animation-delay: 5s;
}
.orb-3 { width: 400px; height: 400px; background: var(--accent-color); top: 50%; left: 50%; transform: translate(-50%, -50%); animation-delay: 10s;
}
@keyframes float { 0%, 100% { transform: translate(0, 0) scale(1);
    }
    33% { transform: translate(30px, -30px) scale(1.1);
    }
    66% { transform: translate(-20px, 20px) scale(0.9);
    }
}
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 900px; margin: 0 auto;
}
.hero-title { font-size: 64px; font-weight: 800; margin-bottom: 20px; background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%); -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; background-clip: text; animation: fadeInUp 1s ease;
}
.hero-subtitle { font-size: 28px; color: var(--primary-light); margin-bottom: 20px; font-weight: 600; animation: fadeInUp 1s ease 0.2s backwards;
}
.hero-description { font-size: 18px; color: var(--text-secondary); margin-bottom: 40px; line-height: 1.8; animation: fadeInUp 1s ease 0.4s backwards;
}
.hero-stats { display: flex; justify-content: center; gap: 60px; margin-bottom: 50px; animation: fadeInUp 1s ease 0.6s backwards;
}
.stat-item { text-align: center;
}
.stat-number { display: block; font-size: 48px; font-weight: 800; background: var(--gradient-1); -webkit-background-clip: text; -webkit-text-fill-color: transparent; 
    background-clip: text;
}
.stat-label { display: block; font-size: 14px; color: var(--text-secondary); margin-top: 5px;
}
.hero-cta { display: flex; justify-content: center; gap: 20px; animation: fadeInUp 1s ease 0.8s backwards;
}
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px);
    }
    to { opacity: 1; transform: translateY(0);
    }
}
/* Section通用样式 */ .section-header { text-align: center; margin-bottom: 60px;
}
.section-title { font-size: 48px; font-weight: 800; margin-bottom: 15px; background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%); -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; background-clip: text;
}
.section-subtitle { font-size: 18px; color: var(--text-secondary);
}
/* 功能特性 */ .features { padding: 100px 0; background: var(--background-light);
}
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 30px;
}
.feature-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 40px 30px; transition: all 0.3s ease; position: 
    relative; overflow: hidden;
}
.feature-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient-1); transform: scaleX(0); transition: 
    transform 0.3s ease;
}
.feature-card:hover { transform: translateY(-5px); border-color: var(--primary-color); box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}
.feature-card:hover::before { transform: scaleX(1);
}
.feature-icon { width: 60px; height: 60px; background: var(--gradient-1); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 
    28px; color: var(--text-primary); margin-bottom: 20px;
}
.feature-card h3 { font-size: 24px; margin-bottom: 15px; color: var(--text-primary);
}
.feature-card p { color: var(--text-secondary); line-height: 1.7;
}
/* 定价 */ .pricing { padding: 100px 0; background: var(--background-dark);
}
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; align-items: start;
}
.pricing-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 40px 30px; transition: all 0.3s ease; position: 
    relative;
}
.pricing-card.featured { border-color: var(--primary-color); transform: scale(1.05); box-shadow: 0 20px 40px rgba(99, 102, 241, 0.3);
}
.pricing-badge { position: absolute; top: -15px; left: 50%; transform: translateX(-50%); background: var(--gradient-1); color: var(--text-primary); padding: 8px 20px; 
    border-radius: 20px; font-size: 14px; font-weight: 600;
}
.pricing-header { text-align: center; margin-bottom: 30px;
}
.pricing-header h3 { font-size: 28px; margin-bottom: 20px; color: var(--text-primary);
}
.price { display: flex; align-items: baseline; justify-content: center; gap: 5px;
}
.currency { font-size: 24px; color: var(--text-secondary);
}
.amount { font-size: 56px; font-weight: 800; color: var(--text-primary);
}
.period { font-size: 16px; color: var(--text-secondary);
}
.pricing-features { list-style: none; margin-bottom: 30px;
}
.pricing-features li { display: flex; align-items: center; gap: 10px; padding: 12px 0; color: var(--text-secondary); border-bottom: 1px solid var(--border-color);
}
.pricing-features li:last-child { border-bottom: none;
}
.pricing-features i { color: var(--primary-color); font-size: 16px;
}
/* 技术文档 */ .docs { padding: 100px 0; background: var(--background-light);
}
.docs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 30px;
}
.doc-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 30px; transition: all 0.3s ease;
}
.doc-card:hover { transform: translateY(-5px); border-color: var(--primary-color); box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}
.doc-icon { width: 50px; height: 50px; background: var(--gradient-2); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 
    24px; color: var(--text-primary); margin-bottom: 20px;
}
.doc-card h3 { font-size: 22px; margin-bottom: 10px; color: var(--text-primary);
}
.doc-card p { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.6;
}
.doc-link { display: inline-flex; align-items: center; gap: 8px; color: var(--primary-color); text-decoration: none; font-weight: 600; transition: gap 0.3s ease;
}
.doc-link:hover { gap: 12px;
}
/* 案例展示 */ .cases { padding: 100px 0; background: var(--background-dark);
}
.cases-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 30px;
}
.case-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 30px; transition: all 0.3s ease;
}
.case-card:hover { transform: translateY(-5px); border-color: var(--primary-color); box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}
.case-header { display: flex; align-items: center; gap: 15px; margin-bottom: 20px;
}
.case-avatar { width: 50px; height: 50px; background: var(--gradient-3); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 
    24px; color: var(--text-primary);
}
.case-info h4 { font-size: 18px; color: var(--text-primary); margin-bottom: 5px;
}
.case-info span { font-size: 14px; color: var(--text-secondary);
}
.case-content { color: var(--text-secondary); line-height: 1.7; font-style: italic;
}
/* 页脚 */ .footer { background: var(--background-light); border-top: 1px solid var(--border-color); padding: 60px 0 30px;
}
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; font-size: 24px; font-weight: 700; color: var(--text-primary); margin-bottom: 15px;
}
.footer-desc { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.6;
}
.social-links { display: flex; gap: 15px;
}
.social-links a { width: 40px; height: 40px; background: var(--background-dark); border: 1px solid var(--border-color); border-radius: 8px; display: flex; 
    align-items: center; justify-content: center; color: var(--text-secondary); text-decoration: none; transition: all 0.3s ease;
}
.social-links a:hover { background: var(--primary-color); border-color: var(--primary-color); color: var(--text-primary);
}
.footer-section h4 { font-size: 18px; color: var(--text-primary); margin-bottom: 20px;
}
.footer-section ul { list-style: none;
}
.footer-section ul li { margin-bottom: 12px;
}
.footer-section ul a { color: var(--text-secondary); text-decoration: none; transition: color 0.3s ease;
}
.footer-section ul a:hover { color: var(--primary-color);
}
.footer-bottom { text-align: center; padding-top: 30px; border-top: 1px solid var(--border-color); color: var(--text-secondary);
}
/* 响应式设计 */ @media (max-width: 768px) { .nav-menu { display: none; position: absolute; top: 70px; left: 0; right: 0; background: var(--background-dark); 
        flex-direction: column; padding: 20px; gap: 15px; border-bottom: 1px solid var(--border-color);
    }
    .nav-menu.active { display: flex;
    }
    .hamburger { display: flex;
    }
    .hero-title { font-size: 40px;
    }
    .hero-subtitle { font-size: 20px;
    }
    .hero-stats { flex-direction: column; gap: 30px;
    }
    .hero-cta { flex-direction: column; align-items: center;
    }
    .section-title { font-size: 36px;
    }
    .features-grid, .pricing-grid, .docs-grid, .cases-grid { grid-template-columns: 1fr;
    }
    .pricing-card.featured { transform: scale(1);
    }
    .footer-content { grid-template-columns: 1fr; gap: 30px;
    }
}
/* 滚动动画 */ .fade-in { opacity: 0; transform: translateY(30px); transition: all 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0);
}