* { margin: 0; padding: 0; box-sizing: border-box; }
  :root { --bg: #0A0F1E; --card: rgba(21,30,54,.85); --line: rgba(148,163,184,.16);
    --text: #F3F6FC; --sub: #A9BCDE; --dim: #6E84AB;
    --blue: #3B82F6; --blue2: #06B6D4; --purple: #8B5CF6; --purple2: #D946EF;
    --orange: #F97316; --orange2: #F59E0B; }
  body { font-family: "Noto Sans CJK SC","PingFang SC","Microsoft YaHei",sans-serif;
    background: var(--bg); color: var(--text); line-height: 1.6; overflow-x: hidden; }
  a { color: inherit; text-decoration: none; }
  .container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }
  .bg-fixed { position: fixed; inset: 0; z-index: -1; pointer-events: none;
    background: radial-gradient(900px 600px at 10% -5%, rgba(249,115,22,.18), transparent 60%),
      radial-gradient(900px 600px at 90% 20%, rgba(59,130,246,.15), transparent 60%),
      radial-gradient(1000px 700px at 50% 100%, rgba(139,92,246,.12), transparent 60%),
      linear-gradient(180deg, #0A0F1E 0%, #0D1530 50%, #0A0F1E 100%); }
  .bg-fixed::after { content: ""; position: absolute; inset: 0;
    background-image: linear-gradient(rgba(148,163,184,.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(148,163,184,.04) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 100%); }
  .nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 18px 0;
    backdrop-filter: blur(20px); background: rgba(10,15,30,.7); border-bottom: 1px solid var(--line); }
  .nav-inner { display: flex; align-items: center; justify-content: space-between; }
  .logo { display: flex; align-items: center; gap: 12px; }
  .logo-mark { width: 40px; height: 40px; border-radius: 11px;
    background: linear-gradient(135deg, var(--blue), var(--purple) 60%, var(--orange));
    display: flex; align-items: center; justify-content: center; font-size: 19px; font-weight: 900; color: #fff; }
  .logo-text { font-size: 18px; font-weight: 700; letter-spacing: 1.5px; }
  .logo-text small { display: block; font-size: 10px; color: var(--dim); letter-spacing: 2px; font-weight: 400; }
  .menu { display: flex; gap: 40px; }
  .menu a { color: var(--sub); font-size: 15px; transition: color 0.2s; }
  .menu a.active, .menu a:hover { color: var(--text); }
  .nav-cta { padding: 10px 22px; border-radius: 999px;
    background: linear-gradient(135deg, var(--blue), var(--purple)); color: #fff; font-size: 14px; font-weight: 600; }
  .hero { padding: 180px 0 120px; text-align: center; position: relative; }
  .hero-kicker { display: inline-flex; align-items: center; gap: 12px; font-size: 13px; letter-spacing: 4px;
    color: var(--sub); padding: 8px 20px; border-radius: 999px;
    background: rgba(148,163,184,.08); border: 1px solid var(--line); }
  .hero-kicker .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--orange); }
  .hero h1 { margin-top: 32px; font-size: 84px; font-weight: 900; line-height: 1.15; letter-spacing: 2px; }
  .hero h1 .grad { background: linear-gradient(95deg, #EAF1FF 10%, #9DC0FF 40%, #C4B5FD 70%, #FDBA74 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent; }
  .hero-sub { margin: 28px auto 0; max-width: 760px; font-size: 20px; color: var(--sub); line-height: 1.8; }
  .section { padding: 120px 0; }
  .section-head { text-align: center; margin-bottom: 80px; }
  .section-kicker { font-size: 13px; letter-spacing: 4px; color: var(--sub);
    display: inline-flex; align-items: center; gap: 12px; }
  .section-kicker::before, .section-kicker::after { content: ""; width: 30px; height: 1px; background: var(--line); }
  .section-title { margin-top: 18px; font-size: 52px; font-weight: 900; letter-spacing: 2px; line-height: 1.2; }
  .section-sub { margin-top: 18px; color: var(--sub); font-size: 18px; }
  /* 简介 */
  .intro-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
  .intro-left h2 { font-size: 48px; font-weight: 900; letter-spacing: 2px; line-height: 1.25; }
  .intro-left h2 .grad { background: linear-gradient(95deg, #9DC0FF, #C4B5FD 50%, #FDBA74);
    -webkit-background-clip: text; background-clip: text; color: transparent; }
  .intro-left p { margin-top: 24px; color: var(--sub); font-size: 16px; line-height: 1.95; }
  .intro-right { padding: 40px; border-radius: 24px;
    background: linear-gradient(180deg, rgba(21,30,54,.92), rgba(13,19,38,.92));
    border: 1px solid var(--line); position: relative; overflow: hidden; }
  .intro-right::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--blue), var(--purple), var(--orange)); }
  .intro-right h3 { font-size: 22px; font-weight: 800; letter-spacing: 1.5px; }
  .intro-right .quote { margin-top: 22px; color: var(--sub); font-size: 16px; line-height: 1.95; }
  .intro-right .quote::before { content: '"'; color: var(--purple); font-size: 36px; line-height: 0; vertical-align: -10px; margin-right: 4px; }
  .intro-right .quote::after  { content: '"'; color: var(--purple); font-size: 36px; line-height: 0; vertical-align: -10px; margin-left: 4px; }
  /* 数据 */
  .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 80px 0; }
  .stat { padding: 36px 24px; border-radius: 20px;
    background: var(--card); border: 1px solid var(--line); text-align: center; position: relative; overflow: hidden; }
  .stat::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--c1), var(--c2)); }
  .stat .v { font-size: 56px; font-weight: 900; letter-spacing: 1px;
    background: linear-gradient(135deg, #fff, #A9BCDE);
    -webkit-background-clip: text; background-clip: text; color: transparent; font-family: Arial; }
  .stat .l { margin-top: 8px; color: var(--sub); font-size: 14px; letter-spacing: 2px; }
  /* 团队文化 */
  .culture { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
  .cv { padding: 36px 28px; border-radius: 20px;
    background: var(--card); border: 1px solid var(--line); transition: transform 0.3s; }
  .cv:hover { transform: translateY(-4px); }
  .cv .n { font-size: 14px; color: var(--dim); letter-spacing: 2px; font-family: Arial; }
  .cv h4 { margin-top: 8px; font-size: 24px; font-weight: 800; letter-spacing: 1.5px; }
  .cv .t { margin-top: 6px; color: var(--vc); font-size: 14px; letter-spacing: 1px; }
  .cv p { margin-top: 18px; color: var(--sub); font-size: 14px; line-height: 1.8; }
  /* 发展历程 */
  .timeline { position: relative; max-width: 1000px; margin: 0 auto; padding: 20px 0; }
  .timeline::before { content: ""; position: absolute; top: 0; bottom: 0; left: 50%;
    width: 2px; background: linear-gradient(180deg, transparent, var(--blue), var(--purple), var(--orange), transparent); }
  .tl-item { display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
    align-items: center; padding: 30px 0; position: relative; }
  .tl-item::before { content: ""; position: absolute; left: 50%; top: 50%;
    width: 16px; height: 16px; border-radius: 50%;
    background: linear-gradient(135deg, var(--blue), var(--orange));
    transform: translate(-50%, -50%); z-index: 2;
    box-shadow: 0 0 0 4px rgba(10,15,30,1), 0 0 16px rgba(99,102,241,.6); }
  .tl-item:nth-child(odd) .tl-content { grid-column: 1; text-align: right; padding-right: 40px; }
  .tl-item:nth-child(odd) .tl-empty { grid-column: 2; }
  .tl-item:nth-child(even) .tl-content { grid-column: 2; padding-left: 40px; }
  .tl-item:nth-child(even) .tl-empty { grid-column: 1; }
  .tl-content .y { font-size: 36px; font-weight: 900;
    background: linear-gradient(135deg, var(--blue), var(--orange));
    -webkit-background-clip: text; background-clip: text; color: transparent; font-family: Arial; }
  .tl-content h4 { margin-top: 8px; font-size: 22px; font-weight: 800; letter-spacing: 1.5px; }
  .tl-content p { margin-top: 8px; color: var(--sub); font-size: 14px; line-height: 1.8; }
  /* 加入我们 */
  .join-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
    padding: 60px 50px; border-radius: 28px;
    background: linear-gradient(135deg, rgba(249,115,22,.10), rgba(139,92,246,.10));
    border: 1px solid var(--line); }
  .join-left h3 { font-size: 40px; font-weight: 900; letter-spacing: 2px; line-height: 1.3; }
  .join-left h3 .grad { background: linear-gradient(95deg, #FDBA74, #C4B5FD);
    -webkit-background-clip: text; background-clip: text; color: transparent; }
  .join-left p { margin-top: 20px; color: var(--sub); font-size: 16px; line-height: 1.9; }
  .join-right { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .job { padding: 22px 20px; border-radius: 14px;
    background: rgba(10,15,30,.6); border: 1px solid var(--line);
    transition: transform 0.3s, border-color 0.3s; cursor: pointer; }
  .job:hover { transform: translateY(-3px); border-color: var(--orange); }
  .job h4 { font-size: 17px; font-weight: 700; letter-spacing: 1px; }
  .job .info { margin-top: 10px; color: var(--dim); font-size: 12px; letter-spacing: 1px; }
  .job .arrow { margin-top: 14px; font-size: 13px; color: var(--orange); }
  .footer { margin-top: 120px; padding: 60px 0 40px; border-top: 1px solid var(--line); background: rgba(5,9,16,.6); }
  .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 60px; }
  .footer h5 { font-size: 14px; color: var(--text); margin-bottom: 18px; letter-spacing: 2px; }
  .footer ul { list-style: none; }
  .footer li { margin-bottom: 10px; }
  .footer a { color: var(--sub); font-size: 14px; }
  .footer-bottom { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line);
    display: flex; justify-content: space-between; color: var(--dim); font-size: 12px; letter-spacing: 1.5px; }
  /* 主题色 */
  .c-blue   { --c1: var(--blue);   --c2: var(--blue2);   --vc: #7DB8FF; }
  .c-purple { --c1: var(--purple); --c2: var(--purple2); --vc: #C4B5FD; }
  .c-orange { --c1: var(--orange); --c2: var(--orange2); --vc: #FDBA74; }
  .c-pink   { --c1: #EC4899;      --c2: #D946EF;        --vc: #F0ABFC; }