:root {
    --bg: #FAFBFC; --surface: #FFFFFF; --border: #E8ECF0; --border-hover: #D0D6DE;
    --text: #0F172A; --text-2: #475569; --text-3: #94A3B8;
    --cyan: #0088A9; --cyan-light: #E6F4F8; --cyan-dark: #006680;
    --teal: #00897B; --teal-light: #E6F4F2;
    --amber: #C27800; --amber-light: #FFF7E6;
    --violet: #6C47FF; --violet-light: #F2EEFF;
    --red: #DC3545; --red-light: #FFF0F0;
    --gradient-1: linear-gradient(135deg, #0088A9 0%, #006680 100%);
    --gradient-2: linear-gradient(135deg, #6C47FF 0%, #0088A9 100%);
    --gradient-hero: linear-gradient(160deg, #F5F8FA 0%, #EAF2F6 30%, #FAFBFC 60%, #F5F8FA 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,.04); --shadow-md: 0 4px 16px rgba(0,0,0,.05), 0 1px 3px rgba(0,0,0,.04);
    --shadow-lg: 0 12px 40px rgba(0,0,0,.06), 0 2px 8px rgba(0,0,0,.03); --shadow-xl: 0 24px 64px rgba(0,0,0,.08);
    --radius: 12px; --radius-lg: 20px; --radius-xl: 28px;
    --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --ease: .35s cubic-bezier(.22,1,.36,1);
  }
  *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
  html{font-size:16px;scroll-behavior:smooth}
  body{font-family:var(--font);font-size:1rem;line-height:1.65;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
  ul{list-style:none}a{color:var(--cyan);text-decoration:none;transition:color .2s}a:hover{color:var(--cyan-dark)}
  .container{max-width:1200px;margin:0 auto;padding:0 1.5rem}

  /* ── Hero ── */
  .hero::before,.hero::after{display:none}
.hero{position:relative;background:var(--gradient-hero);padding:6rem 0 5rem;overflow:hidden;border-bottom:1px solid var(--border)}
  .hero::before{content:'';position:absolute;top:-20%;right:-10%;width:600px;height:600px;background:radial-gradient(circle, rgba(0,136,169,.05) 0%, transparent 60%);pointer-events:none}
  .hero::after{content:'';position:absolute;bottom:10%;left:-5%;width:400px;height:400px;background:radial-gradient(circle, rgba(108,71,255,.04) 0%, transparent 60%);pointer-events:none}
  .hero__grid{position:absolute;inset:0;pointer-events:none;opacity:.4;background-image:linear-gradient(rgba(0,136,169,.04) 1px, transparent 1px),linear-gradient(90deg, rgba(0,136,169,.04) 1px, transparent 1px);background-size:64px 64px;mask-image:radial-gradient(circle at 50% 50%, black 30%, transparent 70%)}
  .hero__inner{position:relative;z-index:1;max-width:800px}
  .hero__overline{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-mono);font-size:.6875rem;font-weight:600;color:var(--cyan);letter-spacing:.08em;text-transform:uppercase;margin-bottom:1.25rem;padding:6px 14px;background:var(--cyan-light);border-radius:100px}
  .hero__dot{width:7px;height:7px;background:var(--teal);border-radius:50%;animation:pulse 2s infinite}
  @keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(0,137,123,.3)}50%{box-shadow:0 0 0 10px rgba(0,137,123,0)}}
  .hero__title{font-size:3.25rem;font-weight:900;line-height:1.08;letter-spacing:-1px;margin-bottom:1.25rem;color:var(--text)}
  .hero__title em{font-style:normal;background:var(--gradient-1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
  .hero__desc{font-size:1.125rem;color:var(--text-2);line-height:1.75;max-width:560px;margin-bottom:2rem}
  .hero__actions{display:flex;gap:.75rem;flex-wrap:wrap}
  .btn{display:inline-flex;align-items:center;gap:.5rem;padding:12px 28px;font-size:.875rem;font-weight:600;font-family:var(--font);border-radius:100px;cursor:pointer;transition:all var(--ease);line-height:1.4;border:1.5px solid transparent}
  .btn--primary{background:var(--cyan);color:#fff;box-shadow:0 4px 12px rgba(0,136,169,.2)}
  .btn--primary:hover{background:var(--cyan-dark);transform:translateY(-1px);box-shadow:0 8px 24px rgba(0,136,169,.25)}
  .btn--outline{background:transparent;color:var(--cyan);border-color:var(--border-hover)}
  .btn--outline:hover{background:var(--cyan-light);border-color:var(--cyan)}
  .btn--white{background:#fff;color:var(--cyan);border-color:#fff;box-shadow:var(--shadow-sm)}
  .btn--white:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}

  /* ── Metrics ── */
  .metrics{display:grid;grid-template-columns:repeat(4, 1fr);gap:1px;background:var(--border);margin-top:-2px;position:relative;z-index:2}
  .metric{background:var(--surface);padding:2rem 1.5rem;text-align:center;transition:all var(--ease)}
  .metric:hover{background:#FAFBFC}
  .metric__icon{font-size:1.5rem;margin-bottom:.5rem}
  .metric__num{font-size:2rem;font-weight:900;letter-spacing:-.5px;margin-bottom:.25rem;background:var(--gradient-1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
  .metric__label{font-size:.75rem;font-weight:500;color:var(--text-3);text-transform:uppercase;letter-spacing:.06em}

  /* ── Sections ── */
  .section{padding:5rem 0}
  .section--surf{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
  .section__hd{margin-bottom:3rem;text-align:center}
  .section__label{display:inline-block;font-family:var(--font-mono);font-size:.625rem;font-weight:600;color:var(--cyan);letter-spacing:.1em;text-transform:uppercase;margin-bottom:.75rem;padding:4px 12px;background:var(--cyan-light);border-radius:6px}
  .section__title{font-size:2rem;font-weight:800;color:var(--text);letter-spacing:-.5px;margin-bottom:.75rem}
  .section__title em{font-style:normal;background:var(--gradient-1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
  .section__desc{font-size:.9375rem;color:var(--text-2);max-width:560px;margin:0 auto;line-height:1.7}

  /* ── Grid ── */
  .grid{display:grid;gap:1.5rem}
  .grid--2{grid-template-columns:repeat(2, 1fr)}.grid--3{grid-template-columns:repeat(3, 1fr)}.grid--4{grid-template-columns:repeat(4, 1fr)}

  /* ── Split ── */
  .split{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}
  .split__visual{aspect-ratio:4/3;border-radius:var(--radius-xl);display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
  .split__visual--cyan{background:linear-gradient(135deg, #E6F4F8, #D0E8F0, #C0DDE8);box-shadow:inset 0 0 100px rgba(0,136,169,.05)}
  .split__visual-inner{font-size:5rem;position:relative;z-index:1;filter:drop-shadow(0 8px 24px rgba(0,0,0,.08))}
  .split__visual-ring{position:absolute;width:200px;height:200px;border-radius:50%;border:2px dashed rgba(0,136,169,.12);animation:spin 30s linear infinite}
  @keyframes spin{to{transform:rotate(360deg)}}
  .split h3{font-size:1.5rem;font-weight:800;color:var(--text);margin-bottom:.75rem;letter-spacing:-.3px}
  .split p{font-size:.9375rem;color:var(--text-2);line-height:1.75;margin-bottom:1rem}
  .split .tags{display:flex;flex-wrap:wrap;gap:6px}
  .split .tags span{padding:5px 14px;font-size:.75rem;font-weight:600;border-radius:100px;background:var(--cyan-light);color:var(--cyan)}

  /* ── Feature Cards ── */
  .fcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2rem;transition:all var(--ease);position:relative;overflow:hidden}
  .fcard::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-1);transform:scaleX(0);transition:transform var(--ease)}
  .fcard:hover{border-color:var(--border-hover);box-shadow:var(--shadow-lg);transform:translateY(-3px)}
  .fcard:hover::before{transform:scaleX(1)}
  .fcard__icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:1.125rem}
  .fcard__icon--cyan{background:var(--cyan-light);color:var(--cyan)}
  .fcard__icon--teal{background:var(--teal-light);color:var(--teal)}
  .fcard__icon--amber{background:var(--amber-light);color:var(--amber)}
  .fcard__icon--violet{background:var(--violet-light);color:var(--violet)}
  .fcard__icon--red{background:var(--red-light);color:var(--red)}
  .fcard__title{font-size:1.0625rem;font-weight:700;margin-bottom:.5rem;color:var(--text)}
  .fcard__desc{font-size:.8125rem;color:var(--text-2);line-height:1.65}

  /* ── Product Cards ── */
  .pcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.75rem;transition:all var(--ease);position:relative;overflow:hidden}
  .pcard::after{content:'';position:absolute;bottom:0;left:0;right:0;height:3px;background:var(--gradient-1);transform:scaleX(0);transition:transform var(--ease);transform-origin:left}
  .pcard:hover{border-color:var(--border-hover);box-shadow:var(--shadow-lg);transform:translateY(-3px)}
  .pcard:hover::after{transform:scaleX(1)}
  .pcard__icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.35rem;margin-bottom:.875rem;background:var(--cyan-light);color:var(--cyan)}
  .pcard__title{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:.5rem}
  .pcard__desc{font-size:.75rem;color:var(--text-2);line-height:1.6;margin-bottom:.75rem}
  .pcard__tags{display:flex;flex-wrap:wrap;gap:4px}
  .pcard__tag{font-family:var(--font-mono);font-size:.625rem;padding:3px 8px;background:#F1F5F9;color:var(--text-3);border-radius:4px;letter-spacing:.03em}

  /* ── Arch ── */
  .arch{display:flex;align-items:center;justify-content:center;gap:.5rem;flex-wrap:wrap;padding:1rem 0}
  .arch__node{text-align:center;padding:1rem .75rem;min-width:130px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);transition:all var(--ease)}
  .arch__node:hover{border-color:var(--cyan);box-shadow:var(--shadow-md);transform:translateY(-3px)}
  .arch__node-icon{font-size:2rem;margin-bottom:.5rem}
  .arch__node-title{font-size:.8125rem;font-weight:700;color:var(--text);margin-bottom:.25rem}
  .arch__node-sub{font-size:.6875rem;color:var(--text-3)}
  .arch__arrow{font-size:1.25rem;color:var(--border-hover);flex-shrink:0;font-weight:300}

  /* ── Specs ── */
  .sgrid{display:grid;grid-template-columns:repeat(3, 1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
  .sitem{padding:1.5rem;background:var(--surface);transition:background var(--ease)}
  .sitem:hover{background:#FAFBFC}
  .sitem__icon{font-size:1.2rem;margin-bottom:.5rem}
  .sitem__label{font-family:var(--font-mono);font-size:.625rem;font-weight:600;color:var(--text-3);letter-spacing:.06em;margin-bottom:.375rem}
  .sitem__value{font-size:.875rem;font-weight:700;color:var(--text);line-height:1.5}

  /* ── App Cards ── */
  .acard{position:relative;border-radius:var(--radius-xl);overflow:hidden;aspect-ratio:16/10;display:flex;align-items:flex-end;transition:all var(--ease)}
  .acard:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl)}
  .acard__bg{position:absolute;inset:0}
  .acard__overlay{position:absolute;inset:0;background:linear-gradient(180deg, transparent 25%, rgba(0,0,0,.8) 100%)}
  .acard__content{position:relative;z-index:1;padding:1.75rem;color:#fff}
  .acard__tag{font-family:var(--font-mono);font-size:.625rem;font-weight:600;letter-spacing:.08em;color:rgba(255,255,255,.5);margin-bottom:.375rem}
  .acard__title{font-size:1.125rem;font-weight:800;margin-bottom:.25rem}
  .acard__desc{font-size:.75rem;color:rgba(255,255,255,.65);line-height:1.5}
  .bg-aero{background:linear-gradient(135deg, #0A1628, #1B3A5C, #0077B6)}
  .bg-power{background:linear-gradient(135deg, #1A0A0A, #3D1F1F, #7B2D2D)}
  .bg-transit{background:linear-gradient(135deg, #0A1A0F, #1A3D28, #059669)}
  .bg-physics{background:linear-gradient(135deg, #0F0A1A, #2A1F4D, #7C3AED)}
  .bg-semi{background:linear-gradient(135deg, #1A1A0F, #3D3A1F, #B8860B)}
  .bg-metal{background:linear-gradient(135deg, #1A0F0A, #4D2A1F, #D97706)}

  /* ── CTA ── */
  .cta{background:var(--gradient-1);border-radius:var(--radius-xl);padding:4rem 3rem;text-align:center;color:#fff;position:relative;overflow:hidden}
  .cta::before{content:'';position:absolute;top:-30%;right:-10%;width:400px;height:400px;background:radial-gradient(circle, rgba(255,255,255,.1) 0%, transparent 60%);pointer-events:none}
  .cta__title{font-size:1.75rem;font-weight:800;margin-bottom:.75rem;position:relative;z-index:1}
  .cta__desc{font-size:.9375rem;color:rgba(255,255,255,.7);max-width:480px;margin:0 auto 2rem;line-height:1.65;position:relative;z-index:1}
  .cta__actions{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap;position:relative;z-index:1}

  /* ── Responsive ── */
  @media(max-width:1024px){
    .grid--4,.grid--3{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:1fr;gap:2rem}
    .metrics{grid-template-columns:repeat(2,1fr)}.hero__title{font-size:2.5rem}.sgrid{grid-template-columns:repeat(2,1fr)}
  }
  @media(max-width:768px){
    .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}.hero__title{font-size:1.875rem}
    .section{padding:3rem 0}.section__title{font-size:1.5rem}.cta{padding:2.5rem 1.5rem}
    .metrics{grid-template-columns:1fr 1fr}.arch{flex-direction:column}.arch__arrow{transform:rotate(90deg)}.sgrid{grid-template-columns:1fr}
  }