:root {
    --blue: #0097FF;
    --blue-dark: #0085f2;
    --blue-light: #e8f3ff;
    --text: #1a2b4a;
    --muted: #6b7a90;
    --bg: #f7f9fc;
    --card: #fff;
    --border: #e3e8f0;
    --green: #2bb673;
    --red: #d35454;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; }
  .container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

  /* hero */
  .hero {
    position: relative; overflow: hidden; padding: 100px 20px 80px; text-align: center;
    background: linear-gradient(180deg, #e8f3ff 0%, #f7f9fc 100%);
  }
  .hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
  .hero-inner { position: relative; max-width: 820px; margin: 0 auto; }
  .hero h1 { margin: 0 0 18px; font-size: 44px; line-height: 1.15; font-weight: 800; }
  .hero h1 .accent { color: var(--blue); }
  .hero .lead { font-size: 19px; color: var(--muted); margin: 0 0 30px; }
  .hero .cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
  .btn {
    display: inline-block; padding: 14px 28px; font-weight: 700; font-size: 15px;
    border-radius: 999px; border: 0; cursor: pointer; text-decoration: none; transition: all .2s;
  }
  .btn-primary { background: var(--blue); color: #fff; box-shadow: 0 6px 20px rgba(0,151,255,0.35); }
  .btn-primary:hover { background: var(--blue-dark); transform: translateY(-2px); }
  .btn-ghost { background: #fff; color: var(--text); border: 1px solid var(--border); }
  .btn-ghost:hover { border-color: var(--blue); color: var(--blue); }
  @media (max-width: 720px) {
    .hero { padding: 60px 16px 50px; }
    .hero h1 { font-size: 30px; }
    .hero .lead { font-size: 16px; }
  }

  /* sections */
  section.block { padding: 80px 0; }
  section.block#about { padding-top: 20px; }
  @media (max-width: 720px) { section.block { padding: 50px 0; } }
  section.block h2 { margin: 0 0 12px; font-size: 36px; text-align: center; font-weight: 800; }
  section.block h2 .accent { color: var(--blue); }
  section.block .sub { text-align: center; color: var(--muted); max-width: 700px; margin: 0 auto 50px; font-size: 17px; }
  @media (max-width: 720px) {
    section.block h2 { font-size: 26px; }
    section.block .sub { font-size: 15px; margin-bottom: 30px; }
  }

  /* counters */
  .counters { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 30px 0 0; }
  .counter {
    padding: 30px 20px; text-align: center; background: #fff; border: 1px solid var(--border);
    border-radius: 16px; transition: transform .25s, box-shadow .25s;
  }
  .counter:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,151,255,0.12); }
  .counter .num { font-size: 42px; font-weight: 800; color: var(--blue); line-height: 1; }
  .counter .label { color: var(--muted); font-size: 14px; margin-top: 8px; }
  @media (max-width: 720px) {
    .counters { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .counter .num { font-size: 30px; }
  }

  /* mission */
  .mission {
    background: linear-gradient(135deg, #0097FF 0%, #0085f2 100%);
    color: #fff; padding: 80px 0; position: relative; overflow: hidden;
  }
  .mission::before, .mission::after {
    content: ''; position: absolute; border-radius: 50%; background: rgba(255,255,255,0.08);
  }
  .mission::before { width: 320px; height: 320px; top: -100px; right: -100px; }
  .mission::after { width: 220px; height: 220px; bottom: -80px; left: -80px; }
  .mission .container { position: relative; text-align: center; }
  .mission h2 { margin: 0 0 18px; font-size: 36px; font-weight: 800; }
  .mission p { font-size: 19px; max-width: 800px; margin: 0 auto; line-height: 1.6; opacity: 0.95; }
  @media (max-width: 720px) {
    .mission { padding: 50px 0; }
    .mission h2 { font-size: 24px; }
    .mission p { font-size: 16px; }
  }

  /* principle cards */
  .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
  @media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 600px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; gap: 14px; }
  }
  .pcard {
    background: #fff; border: 1px solid var(--border); border-radius: 16px;
    padding: 28px 24px; position: relative; overflow: hidden;
    transition: transform .25s, box-shadow .25s;
  }
  .pcard:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(0,151,255,0.14); }
  .pcard .icn {
    width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
    background: var(--blue-light); color: var(--blue); font-size: 24px; font-weight: 800; margin-bottom: 16px;
  }
  .pcard h3 { margin: 0 0 8px; font-size: 19px; }
  .pcard p { margin: 0; color: var(--muted); font-size: 15px; }

  .pcard.big { padding: 34px 28px; }
  .pcard.big h3 { font-size: 21px; }
  .pcard.big .icn { width: 60px; height: 60px; font-size: 28px; }

  /* skills list */
  .skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
  @media (max-width: 720px) { .skills { grid-template-columns: 1fr; } }
  .skill {
    background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 22px 24px;
    display: flex; gap: 16px; align-items: flex-start; transition: transform .2s, box-shadow .2s;
  }
  .skill:hover { transform: translateX(4px); box-shadow: 0 8px 24px rgba(0,0,0,0.05); }
  .skill .num {
    flex: 0 0 auto; width: 40px; height: 40px; border-radius: 50%;
    background: var(--blue); color: #fff; display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 16px;
  }
  .skill h4 { margin: 0 0 6px; font-size: 16px; }
  .skill p { margin: 0; color: var(--muted); font-size: 14px; }

  /* why us */
  .why { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
  @media (max-width: 900px) { .why { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 480px) { .why { grid-template-columns: 1fr; } }
  .why-item {
    background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 22px 18px;
    text-align: center; transition: transform .25s, box-shadow .25s, border-color .25s;
  }
  .why-item:hover { transform: translateY(-6px); box-shadow: 0 14px 30px rgba(0,151,255,0.16); border-color: var(--blue); }
  .why-item .ic {
    width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 50%;
    background: linear-gradient(135deg, #0097FF 0%, #00c2ff 100%);
    color: #fff; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: 800;
    box-shadow: 0 6px 18px rgba(0,151,255,0.4);
  }
  .why-item h4 { margin: 0 0 6px; font-size: 15px; }
  .why-item p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.4; }

  /* cta */
  .cta-block {
    margin: 80px auto; max-width: 1100px; padding: 60px 40px; text-align: center;
    background: linear-gradient(135deg, #0097FF 0%, #0085f2 100%);
    border-radius: 24px; color: #fff; position: relative; overflow: hidden;
  }
  .cta-block::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 80% 30%, rgba(255,255,255,0.15) 0%, transparent 50%);
  }
  .cta-block > * { position: relative; }
  .cta-block h2 { font-size: 34px; margin: 0 0 14px; font-weight: 800; }
  .cta-block p { font-size: 17px; max-width: 700px; margin: 0 auto 28px; opacity: 0.95; }
  .cta-block .btn-primary { background: #fff; color: var(--blue); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
  .cta-block .btn-primary:hover { background: #f0f7ff; }
  @media (max-width: 720px) {
    .cta-block { margin: 50px 16px; padding: 40px 22px; border-radius: 18px; }
    .cta-block h2 { font-size: 22px; }
    .cta-block p { font-size: 15px; }
  }

  /* marquee */
  .marquee { overflow: hidden; padding: 20px 0; background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
  .marquee-track { display: flex; gap: 40px; width: max-content; animation: marquee 25s linear infinite; }
  .marquee-item {
    flex: 0 0 auto; display: flex; align-items: center; gap: 10px;
    padding: 10px 18px; font-weight: 600; font-size: 14px; color: var(--muted); white-space: nowrap;
  }
  .marquee-item .dot { width: 22px; height: 22px; border-radius: 6px; background: var(--blue); display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 11px; font-weight: 800; }
  @keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

  /* scroll reveal */
  .reveal { opacity: 0; transform: translateY(30px); transition: opacity .8s, transform .8s; }
  .reveal.in { opacity: 1; transform: translateY(0); }

  /* sticky cta */
  .sticky-cta {
    position: fixed; right: 24px; bottom: 24px; z-index: 9999;
    padding: 14px 22px; background: var(--blue); color: #fff; font-weight: 700;
    border: 0; border-radius: 999px; box-shadow: 0 6px 20px rgba(0,151,255,0.45);
    cursor: pointer; opacity: 0; transform: translateY(40px); transition: opacity .35s, transform .35s; font-size: 15px;
  }
  .sticky-cta.show { opacity: 1; transform: translateY(0); }
  @media (max-width: 720px) {
    .sticky-cta { left: 12px; right: 12px; bottom: 12px; padding: 14px; text-align: center; border-radius: 12px; }
  }