:root {
    --bg-dark: #0B0A1A;
    --bg-card: rgba(20, 18, 40, 0.7);
    --neon-purple: #B026FF;
    --neon-pink: #FF007F;
    --star-blue: #00E5FF;
    --text-main: #F0F0F5;
    --text-muted: #A0A0B8;
    --font-base: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-base);
    line-height: 1.6;
    overflow-x: hidden;
  }
  a { text-decoration: none; color: inherit; }
  img { display: block; max-width: 100%; }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
  .btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 28px; border-radius: 30px; font-weight: bold;
    background: linear-gradient(135deg, var(--neon-purple), var(--neon-pink));
    color: #fff; transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer; border: none;
  }
  .btn:hover { transform: translateY(-2px); box-shadow: 0 0 15px var(--neon-pink); }
  .glow-text { text-shadow: 0 0 10px var(--neon-purple), 0 0 20px var(--neon-pink); }
  
  /* 导航 */
  header {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
    transition: background 0.3s, backdrop-filter 0.3s;
    padding: 15px 0; border-bottom: 1px solid transparent;
  }
  header.scrolled { background: rgba(11, 10, 26, 0.8); backdrop-filter: blur(10px); border-bottom: 1px solid rgba(176, 38, 255, 0.3); }
  .nav-inner { display: flex; justify-content: space-between; align-items: center; }
  .logo-box { display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: bold; }
  .logo-box img { height: 32px; border-radius: 8px; }
  .nav-links { display: flex; gap: 30px; font-size: 0.95rem; color: var(--text-muted); }
  .nav-links a:hover { color: var(--neon-pink); text-shadow: 0 0 8px var(--neon-pink); }
  
  /* Hero */
  .hero {
    padding: 140px 0 80px; min-height: 100vh; position: relative;
    display: flex; align-items: center; overflow: hidden;
  }
  .hero-bg {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 70% 50%, rgba(176, 38, 255, 0.15) 0%, transparent 60%),
                radial-gradient(circle at 30% 30%, rgba(0, 229, 255, 0.1) 0%, transparent 50%);
    z-index: 0; pointer-events: none;
  }
  .hero-inner {
    display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
    align-items: center; position: relative; z-index: 1; width: 100%;
  }
  .hero-text h1 { font-size: 3.5rem; line-height: 1.2; margin-bottom: 20px; }
  .hero-text p { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 40px; max-width: 480px; }
  .hero-visual { position: relative; height: 600px; }
  .hero-img {
    position: absolute; border-radius: 20px; border: 2px solid rgba(176, 38, 255, 0.4);
    box-shadow: 0 0 30px rgba(255, 0, 127, 0.2); object-fit: cover;
  }
  .hero-img.main { width: 80%; height: 90%; top: 5%; right: 0; z-index: 2; }
  .hero-img.sub { width: 50%; height: 60%; bottom: -10%; left: -5%; z-index: 3; animation: float 6s ease-in-out infinite; }
  @keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }
  
  /* 弹幕墙 */
  .danmaku-section {
    position: relative; height: 200px; overflow: hidden;
    background: url('images/fengyue-b-360.webp') center/cover no-repeat;
    border-top: 1px solid rgba(255,255,255,0.1); border-bottom: 1px solid rgba(255,255,255,0.1);
  }
  .danmaku-section::after { content: ''; position: absolute; inset: 0; background: rgba(11,10,26,0.7); }
  .danmaku-track { position: absolute; display: flex; gap: 20px; white-space: nowrap; z-index: 1; }
  .danmaku-track.tt1 { top: 20%; animation: scrollLeft 25s linear infinite; }
  .danmaku-track.tt2 { top: 50%; animation: scrollRight 30s linear infinite; }
  .danmaku-track.tt3 { top: 80%; animation: scrollLeft 20s linear infinite; }
  .danmaku-bubble {
    background: rgba(176, 38, 255, 0.15); border: 1px solid rgba(176, 38, 255, 0.4);
    padding: 8px 20px; border-radius: 20px; font-size: 0.9rem; backdrop-filter: blur(4px);
    transition: all 0.3s;
  }
  .danmaku-bubble:hover { background: rgba(255, 0, 127, 0.3); box-shadow: 0 0 15px var(--neon-pink); transform: scale(1.05); }
  @keyframes scrollLeft { 0% { transform: translateX(100vw); } 100% { transform: translateX(-100%); } }
  @keyframes scrollRight { 0% { transform: translateX(-100%); } 100% { transform: translateX(100vw); } }

  /* 通用标题 */
  .section-title { text-align: center; margin-bottom: 50px; }
  .section-title h2 { font-size: 2.2rem; margin-bottom: 15px; }
  .section-title p { color: var(--text-muted); font-size: 1rem; }

  /* 角色广场 */
  .character-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px;
  }
  .char-card {
    background: var(--bg-card); border-radius: 20px; overflow: hidden;
    border: 1px solid rgba(255,255,255,0.08); position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
  }
  .char-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 0 25px rgba(176, 38, 255, 0.4); border-color: rgba(176, 38, 255, 0.6);
  }
  .char-card::before {
    content: ''; position: absolute; top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transform: skewX(-20deg); transition: left 0.5s;
  }
  .char-card:hover::before { left: 200%; }
  .char-img { width: 100%; height: 300px; object-fit: cover; object-position: top; }
  .char-info { padding: 20px; }
  .char-info h3 { font-size: 1.2rem; margin-bottom: 10px; }
  .char-tag { display: inline-block; font-size: 0.75rem; padding: 4px 10px; border-radius: 12px; background: rgba(0,229,255,0.15); color: var(--star-blue); margin-bottom: 10px; }
  .char-info p { font-size: 0.9rem; color: var(--text-muted); }

  /* 记忆对比 */
  .memory-section { padding: 100px 0; background: linear-gradient(180deg, var(--bg-dark), #120f26); }
  .memory-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
  .memory-box { padding: 30px; border-radius: 20px; }
  .memory-box.bad { background: rgba(255,255,255,0.03); filter: grayscale(1); border: 1px solid rgba(255,255,255,0.05); }
  .memory-box.good { background: rgba(176, 38, 255, 0.1); border: 1px solid var(--neon-purple); box-shadow: 0 0 30px rgba(176,38,255,0.2); }
  .memory-box h3 { margin-bottom: 20px; font-size: 1.4rem; }
  .chat-sim { background: rgba(0,0,0,0.3); padding: 15px; border-radius: 12px; margin-bottom: 15px; font-size: 0.9rem; line-height: 1.5; }
  .chat-sim.right { background: rgba(255,0,127,0.15); border-left: 3px solid var(--neon-pink); }

  /* 模型展示 */
  .tech-section { padding: 100px 0; text-align: center; }
  .tech-visual { position: relative; width: 600px; height: 400px; margin: 0 auto; background: rgba(0,0,0,0.4); border-radius: 20px; border: 1px solid var(--star-blue); overflow: hidden; }
  .tech-visual img { width: 100%; height: 100%; object-fit: cover; opacity: 0.8; }

  /* 捏人 & 多端 */
  .split-section { padding: 100px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
  .split-text h2 { font-size: 2rem; margin-bottom: 20px; }
  .split-text p { color: var(--text-muted); margin-bottom: 20px; font-size: 1.05rem; }
  .magic-img-wrap { position: relative; border-radius: 20px; padding: 5px; background: linear-gradient(45deg, var(--neon-purple), var(--star-blue)); animation: rotateBg 4s linear infinite; }
  @keyframes rotateBg { 0% { filter: hue-rotate(0deg); } 100% { filter: hue-rotate(360deg); } }
  .magic-img-wrap img { border-radius: 15px; width: 100%; object-fit: cover; }

  /* 评价 */
  .review-section { padding: 100px 0; background: url('images/fengyue-e-360.webp') center/cover fixed; position: relative; }
  .review-section::before { content: ''; position: absolute; inset: 0; background: rgba(11,10,26,0.85); }
  .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; position: relative; z-index: 1; }
  .review-card { background: rgba(20, 18, 40, 0.6); backdrop-filter: blur(12px); border: 1px solid rgba(255,255,255,0.1); padding: 30px; border-radius: 20px; }
  .review-card p { font-size: 0.95rem; color: var(--text-muted); font-style: italic; margin-bottom: 20px; }
  .user-info { display: flex; align-items: center; gap: 15px; }
  .user-info img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }

  /* FAQ */
  .faq-section { padding: 100px 0; max-width: 800px; margin: 0 auto; }
  .faq-item { border-bottom: 1px solid rgba(255,255,255,0.1); padding: 20px 0; }
  .faq-q { font-size: 1.1rem; font-weight: bold; cursor: pointer; display: flex; justify-content: space-between; }
  .faq-a { margin-top: 15px; color: var(--text-muted); font-size: 0.95rem; display: none; }
  .faq-item.active .faq-a { display: block; }

  /* 下载区块 */
  .download-section { padding: 100px 0; text-align: center; background: radial-gradient(circle at center, rgba(255,0,127,0.1), transparent); }
  .download-section h2 { font-size: 2.5rem; margin-bottom: 20px; }
  .dl-btns { display: flex; justify-content: center; gap: 20px; margin-top: 30px; }

  /* 页脚 */
  footer { padding: 40px 0; border-top: 1px solid rgba(255,255,255,0.05); text-align: center; font-size: 0.8rem; color: #666; }
  footer a { color: #888; }
  footer a:hover { color: #fff; }
  .footer-content { display: flex; flex-direction: column; align-items: center; gap: 10px; }

  @media (max-width: 1024px) {
    .hero-text h1 { font-size: 2.8rem; }
    .character-grid { grid-template-columns: repeat(2, 1fr); }
    .memory-compare { grid-template-columns: 1fr; }
    .split-section { grid-template-columns: 1fr; gap: 40px; }
    .review-grid { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-text p { margin: 0 auto 30px; }
    .hero-visual { height: 400px; margin-top: 40px; }
    .hero-img.main { width: 90%; height: 100%; }
    .hero-img.sub { width: 60%; height: 50%; left: 10%; bottom: -10%; }
    .character-grid { grid-template-columns: 1fr; }
    .review-grid { grid-template-columns: 1fr; }
    .tech-visual { width: 100%; height: 300px; }
    .dl-btns { flex-direction: column; }
  }