/* ================================
   全局变量及重置
   ================================ */
   :root {
    --bg-base: #070912;
    --bg-surface: #101423;
    --bg-surface-lighter: #1a1f35;
    --bg-glass: rgba(16, 20, 35, 0.7);
    --text-primary: #ffffff;
    --text-secondary: #8e95ac;
    --accent-primary: #6B4CFF;
    --accent-hover: #8367FF;
    --accent-glow: rgba(107, 76, 255, 0.5);
    --accent-cyan: #00E5FF;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(255, 255, 255, 0.15);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  
  body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }
  
  /* ================================
     导航栏 (Navbar)
     ================================ */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
  }
  .nav-content { display: flex; align-items: center; justify-content: space-between; height: 72px; }
  .logo { font-size: 20px; font-weight: 800; display: flex; align-items: center; gap: 8px; color: var(--text-primary); letter-spacing: -0.5px; }
  .logo i { color: var(--accent-cyan); font-size: 24px; }
  .site-logo { height: 32px; width: 32px; object-fit: contain; border-radius: 6px; background: white; padding: 2.5px; box-shadow: 0 4px 10px rgba(0,0,0,0.4); }
  .nav-links { display: flex; gap: 32px; }
  .nav-links a { text-decoration: none; color: var(--text-secondary); font-weight: 500; font-size: 15px; transition: var(--transition-fast); }
  .nav-links a:hover { color: var(--text-primary); }
  
  /* ================================
     按钮 (Buttons)
     ================================ */
  .btn { border: none; cursor: pointer; font-family: inherit; font-weight: 600; font-size: 15px; padding: 12px 28px; border-radius: var(--radius-sm); transition: var(--transition-smooth); display: inline-flex; align-items: center; justify-content: center; gap: 8px; }
  .btn-primary { background: linear-gradient(135deg, var(--accent-primary), #482cd4); color: white; border: 1px solid rgba(255,255,255,0.1); box-shadow: 0 4px 20px var(--accent-glow); }
  .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px var(--accent-glow); background: linear-gradient(135deg, var(--accent-hover), var(--accent-primary)); }
  .btn-secondary { background: rgba(255,255,255,0.03); color: var(--text-primary); border: 1px solid var(--border-color); backdrop-filter: blur(8px); }
  .btn-secondary:hover { background: rgba(255,255,255,0.08); border-color: var(--border-glow); transform: translateY(-2px); }
  .btn-win { background: #0078D7; color: #ffffff; border: 1px solid rgba(255,255,255,0.1); box-shadow: 0 4px 20px rgba(0,120,215,0.3); }
  .btn-win:hover { background: #005A9E; transform: translateY(-2px); }
  .btn-mac { background: #000000; color: #ffffff; border: 1px solid #333333; box-shadow: 0 4px 20px rgba(0,0,0,0.5); }
  .btn-mac:hover { background: #1a1a1a; border-color: #555555; transform: translateY(-2px); }
  .btn-large { padding: 16px 32px; font-size: 16px; border-radius: 12px; }
  .btn-outline { background: transparent; color: var(--text-primary); border: 1px solid var(--border-color); padding: 8px 20px; font-size: 14px; }
  .btn-outline:hover { background: white; color: var(--bg-base); }
  
  /* ================================
     左右排版头部区域 (Hero Section)
     ================================ */
  .hero {
    position: relative;
    padding: 180px 0 100px;
    overflow: hidden;
  }
  
  .hero-bg-glow {
    position: absolute;
    top: 0;
    left: 20%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(107, 76, 255, 0.15) 0%, rgba(0, 229, 255, 0.1) 40%, rgba(7, 9, 18, 0) 70%);
    z-index: -1;
    pointer-events: none;
  }
  
  .hero-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
  }
  
  .hero-content {
    flex: 1.1;
    text-align: left;
  }
  
  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-size: 13px;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 24px;
  }
  
  .badge-dot { width: 8px; height: 8px; background-color: var(--accent-cyan); border-radius: 50%; box-shadow: 0 0 10px var(--accent-cyan); }
  
  .hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -2px;
    /* 更换为纯净的高对比度渐变色，去除显脏的阴影和灰色 */
    background: linear-gradient(135deg, #FFFFFF 0%, #E0F2FE 50%, #00C2FF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .hero-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 0 36px 0;
    font-weight: 400;
    line-height: 1.8;
  }
  
  .hero-actions {
    display: flex;
    gap: 16px;
    justify-content: flex-start;
    margin-bottom: 40px;
  }
  
  .hero-stats {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;
    margin: 0;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
  }
  
  .stat-item { color: var(--text-secondary); font-size: 13px; }
  .stat-item span { display: block; color: var(--text-primary); font-weight: 700; font-size: 20px; margin-bottom: 4px; }
  
  /* 模型图片 (放在右侧) */
  .hero-mockup {
    flex: 1;
    position: relative;
    max-width: 600px;
    perspective: 1200px;
  }
  
  .mockup-img {
    width: 100%;
    /* 让右侧图像带点往里轻微侧偏的空间感 */
    transform: rotateY(-8deg) rotateX(4deg) scale(1.05);
    transition: var(--transition-smooth);
    animation: floatLeftRight 6s ease-in-out infinite;
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 12%, black 88%, transparent 100%),
                        linear-gradient(to right, transparent 0%, black 12%, black 88%, transparent 100%);
    -webkit-mask-composite: source-in;
    mask-image: linear-gradient(to bottom, transparent 0%, black 12%, black 88%, transparent 100%),
                linear-gradient(to right, transparent 0%, black 12%, black 88%, transparent 100%);
    mask-composite: intersect;
  }
  
  .hero-mockup:hover .mockup-img {
    transform: rotateY(0) rotateX(0) scale(1.05) translateY(-10px);
  }
  
  @keyframes floatLeftRight {
    0% { transform: translateY(0px) rotateY(-8deg) rotateX(4deg) scale(1.05); }
    50% { transform: translateY(-15px) rotateY(-8deg) rotateX(4deg) scale(1.05); }
    100% { transform: translateY(0px) rotateY(-8deg) rotateX(4deg) scale(1.05); }
  }
  
  /* ================================
     特性区域 (Features Grid)
     ================================ */
  .features { padding: 120px 0; background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-surface) 100%); border-top: 1px solid var(--border-color); }
  .section-header { text-align: center; margin-bottom: 70px; }
  .section-title { font-size: 40px; font-weight: 700; margin-bottom: 20px; letter-spacing: -1px; }
  .section-subtitle { font-size: 18px; color: var(--text-secondary); }
  .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
  
  .feature-card { background: rgba(255, 255, 255, 0.02); border: 1px solid var(--border-color); padding: 40px 32px; border-radius: var(--radius-md); transition: var(--transition-smooth); backdrop-filter: blur(10px); }
  .feature-card:hover { background: rgba(255, 255, 255, 0.04); transform: translateY(-8px); border-color: rgba(255,255,255,0.15); box-shadow: 0 10px 30px rgba(0,0,0,0.4); }
  .feature-icon { width: 54px; height: 54px; background: linear-gradient(135deg, rgba(107, 76, 255, 0.2), rgba(0, 229, 255, 0.1)); border: 1px solid rgba(255,255,255,0.05); border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 24px; color: var(--accent-cyan); margin-bottom: 24px; }
  .feature-name { font-size: 22px; font-weight: 600; margin-bottom: 12px; }
  .feature-desc { color: var(--text-secondary); font-size: 15px; line-height: 1.7; }
  
  /* ================================
     深度解析区 (Deep Dive)
     ================================ */
  .deep-dive { padding: 100px 0; background: var(--bg-surface); }
  .split-section { display: flex; align-items: center; gap: 80px; margin-bottom: 140px; }
  .split-section.reverse { flex-direction: row-reverse; }
  .split-content { flex: 1; }
  .sub-label { color: var(--accent-cyan); font-weight: 700; font-size: 14px; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 16px; }
  .split-content h2 { font-size: 42px; font-weight: 700; margin-bottom: 24px; line-height: 1.2; }
  .split-content p { color: var(--text-secondary); font-size: 18px; line-height: 1.8; margin-bottom: 32px; }
  
  .check-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }
  .check-list li { display: flex; align-items: center; gap: 12px; font-size: 16px; color: var(--text-primary); font-weight: 500; }
  .check-list i { flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; color: var(--accent-primary); font-size: 18px; background: rgba(107, 76, 255, 0.15); border-radius: 50%; }
  
  .split-image { flex: 1.2; position: relative; }
  .split-image img { width: 100%; position: relative; z-index: 2; transition: transform 0.4s ease; -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 12%, black 88%, transparent 100%), linear-gradient(to right, transparent 0%, black 12%, black 88%, transparent 100%); -webkit-mask-composite: source-in; mask-image: linear-gradient(to bottom, transparent 0%, black 12%, black 88%, transparent 100%), linear-gradient(to right, transparent 0%, black 12%, black 88%, transparent 100%); mask-composite: intersect; }
  .split-image:hover img { transform: translateY(-5px) scale(1.02); }
  
  /* ================================
     底部 (Footer)
     ================================ */
  .footer { padding: 80px 0 40px; border-top: 1px solid rgba(255,255,255,0.05); background: var(--bg-base); }
  .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 60px; }
  .footer-brand-col .logo { font-size: 24px; margin-bottom: 16px; }
  .footer-brand-col .footer-desc { color: var(--text-secondary); margin-bottom: 24px; max-width: 300px; }
  .social-links { display: flex; gap: 16px; }
  .social-links a { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: rgba(255,255,255,0.05); border-radius: 50%; color: var(--text-primary); text-decoration: none; font-size: 20px; transition: var(--transition-fast); }
  .social-links a:hover { background: var(--accent-primary); transform: translateY(-3px); }
  .footer-links-col h4 { font-size: 16px; font-weight: 600; margin-bottom: 24px; }
  .footer-links-col a { display: block; color: var(--text-secondary); text-decoration: none; margin-bottom: 12px; transition: var(--transition-fast); }
  .footer-links-col a:hover { color: var(--accent-cyan); }
  .footer-copyright { text-align: center; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.05); font-size: 14px; color: rgba(255,255,255,0.3); }
  
  /* 响应式适配 */
  @media (max-width: 992px) {
    .hero-grid { flex-direction: column; text-align: center; }
    .hero-content { text-align: center; }
    .hero-subtitle { margin: 0 auto 36px auto; }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-mockup { margin-top: 40px; }
    .split-section, .split-section.reverse { flex-direction: column; gap: 40px; }
  }