:root {
    --navy: #071a3d;
    --navy-2: #0c2a5e;
    --blue: #0f52ba;      /* sapphire */
    --blue-light: #4d8df0;
    --sky: #8fbaff;
    --ink: #111a2c;
    --muted: #5d6b82;
    --line: #e3e8f0;
    --bg: #ffffff;
    --bg-soft: #f4f7fc;
    --radius: 16px;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; scroll-padding-top: 72px; }
  body {
    font-family: "Pretendard Variable", Pretendard, -apple-system, "Malgun Gothic", sans-serif;
    color: var(--ink); background: var(--bg); line-height: 1.65;
    word-break: keep-all; -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  ul, ol { list-style: none; }
  img { display: block; max-width: 100%; }
  .wrap { width: min(1160px, 100% - 40px); margin-inline: auto; }

  /* header */
  header {
    position: fixed; inset: 0 0 auto 0; z-index: 50; height: 72px;
    display: flex; align-items: center;
    transition: background .25s, box-shadow .25s; color: var(--ink);
  }
  header.scrolled { background: rgba(255,255,255,.94); backdrop-filter: blur(10px); color: var(--ink); box-shadow: 0 1px 0 var(--line); }
  header .wrap { display: flex; align-items: center; justify-content: space-between; }
  .logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -.01em; }
  .logo svg { width: 28px; height: 28px; }
  nav ul { display: flex; align-items: center; gap: 30px; font-weight: 600; font-size: 15px; }
  nav a { opacity: .85; transition: opacity .2s; }
  nav a:hover { opacity: 1; }
  .nav-cta { padding: 9px 18px; border-radius: 999px; background: var(--blue); color: #fff !important; opacity: 1 !important; }
  .menu-btn { display: none; background: none; border: 0; color: inherit; cursor: pointer; padding: 8px; }
  .menu-btn svg { width: 26px; height: 26px; display: block; }

  /* hero */
  .hero {
    position: relative; overflow: hidden; color: var(--ink);
    padding: 150px 0 0;
    background:
      radial-gradient(760px 520px at 84% 34%, rgba(77,141,240,.22), transparent 65%),
      radial-gradient(520px 380px at 4% 96%, rgba(111,224,208,.16), transparent 65%),
      linear-gradient(180deg, #f2f6fe 0%, #ffffff 100%);
  }
  .hero .btn-primary { background: var(--blue); color: #fff; box-shadow: 0 12px 24px -10px rgba(15,82,186,.6); }
  .hero .btn-ghost { border-color: #cfd8e6; color: var(--ink); background: #fff; }
  .hero .btn-ghost:hover { background: var(--bg-soft); }
  .e3d { width: 56px; height: 56px; margin-bottom: 16px; }
  .float { position: absolute; z-index: 5; filter: drop-shadow(0 14px 16px rgba(15,42,94,.22)); }
  .hero .wrap { position: relative; z-index: 1; }
  .hero-grid { display: grid; grid-template-columns: 1fr 1.02fr; gap: 56px; align-items: center; }
  .eyebrow.pill { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px; background: #e4edfd; letter-spacing: .04em; color: var(--blue); }
  .eyebrow.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #1aa868; box-shadow: 0 0 0 4px rgba(26,168,104,.18); }

  /* hero visual: stacked browser frames */
  .stack { position: relative; aspect-ratio: 10 / 8.6; }
  .frame { position: absolute; border-radius: 12px; overflow: hidden; background: #fff; box-shadow: 0 30px 60px -24px rgba(15,42,94,.45), 0 0 0 1px var(--line); }
  .frame::before { content: ""; display: block; height: 26px; background: #eef2f8 radial-gradient(circle at 16px 13px, #ff6159 4px, transparent 4.5px), #eef2f8; background-image: radial-gradient(circle at 16px 13px, #ff6159 4px, transparent 4.5px), radial-gradient(circle at 32px 13px, #ffbd2e 4px, transparent 4.5px), radial-gradient(circle at 48px 13px, #28c941 4px, transparent 4.5px); }
  .frame img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top center; }
  .frame.f1 { width: 78%; right: 0; top: 0; }
  .frame.f2 { width: 62%; left: 0; top: 30%; z-index: 2; }
  .frame.f3 { width: 50%; right: 4%; bottom: 0; z-index: 3; }
  .stack .badge { position: absolute; z-index: 4; left: 6%; top: 8%; padding: 10px 16px; border-radius: 12px; background: #fff; color: var(--navy); font-weight: 700; font-size: 14px; box-shadow: 0 14px 30px -12px rgba(15,42,94,.45), 0 0 0 1px var(--line); }
  .stack .badge i { font-style: normal; color: #1aa868; margin-right: 6px; }
  .eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--sky); margin-bottom: 20px; }
  .hero h1 { font-size: clamp(32px, 4.3vw, 54px); line-height: 1.22; font-weight: 800; letter-spacing: -.035em; }
  .hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--blue), #1f9bc4); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .hero p { margin-top: 24px; max-width: 520px; font-size: clamp(16px, 1.4vw, 18px); color: var(--muted); }
  .btns { margin-top: 40px; display: flex; gap: 12px; flex-wrap: wrap; }
  .btn { display: inline-flex; align-items: center; gap: 8px; padding: 15px 28px; border-radius: 999px; font-weight: 700; font-size: 16px; transition: transform .2s, background .2s; }
  .btn:hover { transform: translateY(-2px); }
  .btn-primary { background: #fff; color: var(--navy); }
  .btn-ghost { border: 1px solid rgba(255,255,255,.35); color: #fff; }
  .btn-ghost:hover { background: rgba(255,255,255,.1); }
  .facts { margin-top: 72px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; padding-bottom: 56px; }
  .facts li { display: flex; align-items: center; gap: 14px; padding: 18px 20px; border-radius: 16px; background: #fff; border: 1px solid var(--line); box-shadow: 0 10px 24px -18px rgba(15,42,94,.35); }
  .facts img { width: 44px; height: 44px; flex: none; }
  .facts b { display: block; font-size: 17px; letter-spacing: -.02em; }
  .facts span { font-size: 14px; color: var(--muted); }

  /* anything band */
  .anything { margin-top: 24px; padding: 44px 40px; border-radius: 24px; background: linear-gradient(150deg, #eaf1fe 0%, #f4fbfa 100%); border: 1px solid var(--line); }
  .anything h3 { font-size: clamp(22px, 2.4vw, 30px); letter-spacing: -.03em; line-height: 1.3; }
  .anything > p { color: var(--muted); margin-top: 10px; font-size: 16.5px; max-width: 720px; }
  .cases { margin-top: 28px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .cases li { padding: 26px 24px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
  .cases b { display: block; font-size: 17.5px; letter-spacing: -.02em; margin-bottom: 6px; }
  .cases span { color: var(--muted); font-size: 15px; }

  /* sections */
  section { padding: 110px 0; }
  .soft { background: var(--bg-soft); }
  .sec-head { max-width: 760px; margin-bottom: 56px; }
  .sec-head .eyebrow { color: var(--blue); margin-bottom: 12px; }
  .sec-head h2 { font-size: clamp(28px, 3.6vw, 42px); line-height: 1.25; font-weight: 800; letter-spacing: -.03em; }
  .sec-head p { margin-top: 16px; color: var(--muted); font-size: 17px; }

  /* core business */
  .trio { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 10px; align-items: stretch; }
  .trio .sys { padding: 30px 26px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
  .trio .who { display: inline-block; font-size: 12.5px; font-weight: 700; color: var(--blue); background: #e8f0fd; padding: 4px 10px; border-radius: 6px; margin-bottom: 12px; }
  .trio h3 { font-size: 21px; letter-spacing: -.02em; margin-bottom: 8px; }
  .trio .sys > p { color: var(--muted); font-size: 15px; margin-bottom: 16px; }
  .trio .chips { display: flex; flex-wrap: wrap; gap: 6px; }
  .trio .chips span { font-size: 13px; font-weight: 600; padding: 5px 10px; border-radius: 7px; border: 1px solid var(--line); background: var(--bg-soft); color: #33415a; }
  .trio .arrow { align-self: center; color: var(--blue-light); font-size: 26px; font-weight: 800; }
  .onedb { margin-top: 12px; padding: 16px 20px; border-radius: 14px; text-align: center; font-weight: 700; color: #fff; background: linear-gradient(90deg, var(--navy-2), var(--blue)); font-size: 15.5px; }
  .flow { margin-top: 40px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; counter-reset: fl; }
  .flow li { position: relative; padding: 22px 20px 22px 58px; border-radius: 14px; background: #fff; border: 1px solid var(--line); font-size: 15px; color: #33415a; }
  .flow li::before { counter-increment: fl; content: counter(fl); position: absolute; left: 18px; top: 20px; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--blue); color: #fff; font-weight: 800; font-size: 14px; }
  .flow b { display: block; font-size: 16px; color: var(--ink); letter-spacing: -.02em; }
  .examples { margin-top: 56px; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .example { padding: 36px 32px; border-radius: 24px; background: #fff; border: 1px solid var(--line); }
  .example h3 { font-size: 23px; letter-spacing: -.02em; margin-bottom: 4px; }
  .example > p { color: var(--muted); font-size: 15.5px; margin-bottom: 20px; }
  .example dl div { padding: 16px 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: 108px 1fr; gap: 14px; }
  .example dt { font-weight: 700; color: var(--blue); font-size: 14.5px; }
  .example dd { font-size: 15px; color: #33415a; }
  .example dd small { display: block; color: var(--muted); font-size: 13.5px; margin-top: 2px; }
  .example .together { margin-top: 6px; margin-bottom: 0; padding: 16px 18px; border-radius: 12px; background: var(--bg-soft); font-size: 15px; color: #33415a; }
  .example .together b { color: var(--blue); }
  .core-close { margin-top: 28px; padding: 26px 30px; border-radius: var(--radius); background: linear-gradient(150deg, var(--navy) 0%, var(--blue) 140%); color: #fff; font-size: 17px; }
  .core-close b { display: block; font-size: 21px; letter-spacing: -.02em; margin-bottom: 4px; }
  .core-close span { color: rgba(255,255,255,.82); }

  /* core business: triangle of three systems */
  .tris { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .tri-card { padding: 32px; border-radius: 24px; background: #fff; border: 1px solid var(--line); }
  .tri-card > h3 { font-size: 23px; letter-spacing: -.02em; }
  .tri-card > p { color: var(--muted); font-size: 15.5px; margin-bottom: 8px; }
  .tri { position: relative; aspect-ratio: 1 / .92; max-width: 500px; margin: 20px auto 26px; }
  .tri::before { content: ""; position: absolute; left: 50%; top: 54%; width: 58%; aspect-ratio: 1; transform: translate(-50%, -50%); border-radius: 50%; border: 10px solid #e3eaf6; }
  .tri .center { position: absolute; left: 50%; top: 53%; transform: translate(-50%, -50%); text-align: center; font-weight: 800; font-size: 17px; letter-spacing: -.02em; line-height: 1.3; }
  .tri .center small { display: block; margin-top: 4px; font-weight: 700; font-size: 12px; color: #fff; background: var(--blue); border-radius: 999px; padding: 3px 10px; }
  .node { position: absolute; width: 40%; border-radius: 12px; overflow: hidden; background: #fff; border-top: 5px solid var(--blue); box-shadow: 0 16px 30px -16px rgba(15,42,94,.45), 0 0 0 1px var(--line); }
  .node img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top center; }
  .node b { display: block; padding: 8px 6px; font-size: 14px; text-align: center; letter-spacing: -.02em; }
  .node.n1 { left: 30%; top: 0; }
  .node.n2 { left: 0; bottom: 0; border-top-color: #d6457a; }
  .node.n3 { right: 0; bottom: 0; border-top-color: #1aa868; }
  .legend > div { padding: 14px 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: 14px 1fr; gap: 12px; }
  .legend i { width: 12px; height: 12px; border-radius: 50%; margin-top: 6px; background: var(--blue); }
  .legend .c2 i { background: #d6457a; }
  .legend .c3 i { background: #1aa868; }
  .legend b { font-size: 16px; letter-spacing: -.02em; }
  .legend p { color: var(--muted); font-size: 14.5px; margin: 2px 0 8px; }
  .chips { display: flex; flex-wrap: wrap; gap: 6px; }
  .chips span { font-size: 13px; font-weight: 600; padding: 4px 10px; border-radius: 7px; border: 1px solid var(--line); background: var(--bg-soft); color: #33415a; }
  .core-sub { margin: 64px 0 20px; font-size: clamp(21px, 2.3vw, 27px); letter-spacing: -.03em; }
  .core-sub + p { color: var(--muted); font-size: 16.5px; margin-bottom: 24px; max-width: 760px; }
  .ba { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .ba li { padding: 24px 26px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
  .ba .was { color: var(--muted); font-size: 14.5px; }
  .ba .was::before { content: "전"; display: inline-block; margin-right: 8px; padding: 1px 8px; border-radius: 6px; background: #eceff4; color: #5d6b82; font-size: 12.5px; font-weight: 700; }
  .ba .now { margin-top: 8px; font-size: 16px; font-weight: 600; letter-spacing: -.02em; }
  .ba .now::before { content: "후"; display: inline-block; margin-right: 8px; padding: 1px 8px; border-radius: 6px; background: var(--blue); color: #fff; font-size: 12.5px; font-weight: 700; }
  .sols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .sols li { padding: 22px 20px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
  .sols img { width: 44px; height: 44px; margin-bottom: 10px; }
  .sols b { display: block; font-size: 16px; letter-spacing: -.02em; }
  .sols span { color: var(--muted); font-size: 14px; }
  .db { margin-top: 16px; padding: 18px 22px; border-radius: var(--radius); background: linear-gradient(90deg, var(--navy-2), var(--blue)); color: #fff; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; }
  .db b { font-size: 16px; margin-right: 6px; }
  .db span { padding: 4px 12px; border-radius: 999px; background: rgba(255,255,255,.14); font-size: 14px; font-weight: 600; }

  /* promises */
  .promises { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .promise { padding: 40px 36px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: transform .25s, box-shadow .25s, border-color .25s; }
  .promise:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -18px rgba(15,82,186,.35); border-color: transparent; }
  .promise.lead { background: linear-gradient(150deg, var(--navy) 0%, var(--blue) 140%); color: #fff; border-color: transparent; }
  .promise .num { font-size: 14px; font-weight: 800; color: var(--blue); letter-spacing: .1em; }
  .promise.lead .num { color: var(--sky); }
  .promise h3 { margin: 14px 0 12px; font-size: 24px; line-height: 1.35; letter-spacing: -.02em; }
  .promise p { color: var(--muted); font-size: 16px; }
  .promise.lead p { color: rgba(255,255,255,.82); }

  /* sites */
  .sites { display: grid; gap: 28px; }
  .site { display: grid; grid-template-columns: 1.05fr 1fr; background: #fff; border: 1px solid var(--line); border-radius: 24px; overflow: hidden; }
  .site:nth-child(even) .shot { order: 2; }
  .shot { position: relative; background: #dfe6f1; min-height: 320px; }
  .shot img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top center; }
  .shot { overflow: hidden; }
  .slides img { opacity: 0; transform: scale(1.22); transform-origin: top center; transition: opacity 1.1s ease; }
  .slides img.on { opacity: 1; animation: zoomout 3.4s ease-out forwards; }
  @keyframes zoomout { from { transform: scale(1.22); } to { transform: scale(1); } }
  .slides .cap { position: absolute; left: 14px; bottom: 14px; z-index: 2; padding: 6px 12px; border-radius: 8px; background: rgba(7,26,61,.78); color: #fff; font-size: 13px; font-weight: 600; backdrop-filter: blur(4px); }
  .slides .dots { position: absolute; right: 14px; bottom: 18px; z-index: 2; display: flex; gap: 6px; }
  .slides .dots button { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 50%; background: rgba(255,255,255,.55); box-shadow: 0 0 0 1px rgba(7,26,61,.25); cursor: pointer; transition: width .3s, background .3s; }
  .slides .dots button.on { width: 22px; border-radius: 4px; background: #fff; }
  .shot.cloud { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; color: #fff; background: linear-gradient(150deg, var(--navy) 0%, var(--blue) 130%); }
  .shot.cloud svg { width: 96px; height: 96px; color: var(--sky); }
  .shot.cloud b { font-size: 28px; letter-spacing: -.02em; }
  .shot.cloud span { color: rgba(255,255,255,.75); font-size: 15px; }
  .site-body { padding: 44px 40px; display: flex; flex-direction: column; }
  .site-body .client { font-size: 13px; font-weight: 700; color: var(--blue); letter-spacing: .04em; }
  .site-body h3 { font-size: 26px; letter-spacing: -.02em; margin: 6px 0 14px; }
  .site-body > p { color: var(--muted); font-size: 16px; margin-bottom: 18px; }
  .site-body li { position: relative; padding-left: 16px; font-size: 15.5px; color: #33415a; margin-bottom: 4px; }
  .site-body li::before { content: ""; position: absolute; left: 0; top: .7em; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-light); }
  .links { margin-top: auto; padding-top: 22px; display: flex; flex-wrap: wrap; gap: 8px; }
  .links a { font-size: 13.5px; font-weight: 600; padding: 6px 12px; border-radius: 8px; background: var(--bg-soft); color: var(--blue); border: 1px solid var(--line); transition: background .2s; }
  .links a:hover { background: #e8f0fd; }
  .links span { font-size: 13.5px; font-weight: 600; padding: 6px 12px; border-radius: 8px; color: var(--muted); border: 1px dashed var(--line); }

  /* long-term partner */
  .years { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .year { padding: 30px 28px; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; }
  .year h3 { font-size: 30px; font-weight: 800; color: var(--blue); letter-spacing: -.02em; line-height: 1; margin-bottom: 18px; }
  .year li { position: relative; padding: 9px 0 9px 16px; border-top: 1px solid var(--line); font-size: 15.5px; color: #33415a; }
  .year li::before { content: ""; position: absolute; left: 0; top: 1.15em; width: 6px; height: 6px; border-radius: 50%; background: var(--blue-light); }
  .partner-note { margin-top: 28px; padding: 24px 28px; border-radius: var(--radius); background: var(--bg-soft); color: #33415a; font-size: 16px; }
  .partner-note b { color: var(--blue); }

  /* services */
  .services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .services li { padding: 28px 26px; background: #fff; border-radius: var(--radius); border: 1px solid var(--line); }
  .services small { display: block; color: var(--blue); font-weight: 700; font-size: 12.5px; letter-spacing: .06em; margin-bottom: 6px; }
  .services h3 { font-size: 18.5px; letter-spacing: -.02em; margin-bottom: 8px; }
  .services p { color: var(--muted); font-size: 15px; }

  /* process */
  .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
  .steps li { position: relative; padding: 32px 26px; border-radius: var(--radius); background: var(--bg-soft); }
  .soft .steps li { background: #fff; }
  .steps li::before { counter-increment: step; content: "0" counter(step); display: block; font-weight: 800; font-size: 34px; color: var(--blue); letter-spacing: -.02em; line-height: 1; margin-bottom: 18px; }
  .steps h3 { font-size: 19px; letter-spacing: -.02em; margin-bottom: 8px; }
  .steps p { color: var(--muted); font-size: 15px; }

  /* tech */
  .tech { display: grid; border-top: 1px solid var(--line); }
  .tech-row { display: grid; grid-template-columns: 220px 1fr; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line); align-items: start; }
  .tech-row dt { font-weight: 700; color: var(--blue); font-size: 15px; padding-top: 6px; }
  .tech-row dd { display: flex; flex-wrap: wrap; gap: 8px; }
  .tech-row dd span { padding: 7px 14px; background: #fff; border: 1px solid var(--line); border-radius: 8px; font-weight: 600; font-size: 14.5px; }

  /* history */
  .history { border-left: 2px solid var(--line); margin-left: 6px; }
  .history li { position: relative; padding: 0 0 30px 32px; display: grid; grid-template-columns: 190px 1fr; gap: 16px; }
  .history li::before { content: ""; position: absolute; left: -7px; top: 8px; width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 3px solid var(--blue); }
  .history time { font-weight: 700; color: var(--blue); font-size: 15px; }
  .history b { display: block; font-size: 17.5px; letter-spacing: -.02em; }
  .history span { color: var(--muted); font-size: 15px; }

  /* experience */
  .exp { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .exp article { padding: 30px 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
  .exp h3 { font-size: 18.5px; letter-spacing: -.02em; margin-bottom: 10px; }
  .exp p { color: var(--muted); font-size: 15px; }

  /* contact */
  .contact { background: var(--navy); color: #fff; text-align: center; }
  .contact h2 { font-size: clamp(28px, 4vw, 46px); letter-spacing: -.03em; line-height: 1.25; font-weight: 800; }
  .contact p { margin: 18px auto 36px; max-width: 600px; color: rgba(255,255,255,.72); font-size: 17px; }
  .contact-info { margin-top: 56px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; text-align: left; }
  .contact-info div { padding: 24px; border-radius: var(--radius); background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); }
  .contact-info b { display: block; font-size: 13px; letter-spacing: .08em; color: var(--sky); margin-bottom: 6px; }

  footer { background: #04112a; color: rgba(255,255,255,.5); padding: 36px 0; font-size: 14px; }
  footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

  .reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s, transform .6s; }
  .reveal.in { opacity: 1; transform: none; }

  @media (max-width: 1000px) {
    .services, .exp, .years { grid-template-columns: repeat(2, 1fr); }
    .cases { grid-template-columns: 1fr; }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .facts { grid-template-columns: repeat(2, 1fr); }
    .hero-grid { grid-template-columns: 1fr; gap: 48px; }
    .stack { max-width: 560px; }
    .site { grid-template-columns: 1fr; }
    .site:nth-child(even) .shot { order: 0; }
    .shot { min-height: 0; aspect-ratio: 16 / 9; }
    .contact-info { grid-template-columns: 1fr; }
    .tris { grid-template-columns: 1fr; }
    .sols { grid-template-columns: repeat(2, 1fr); }
    .trio { grid-template-columns: 1fr; }
    .trio .arrow { transform: rotate(90deg); justify-self: center; }
    .flow { grid-template-columns: repeat(2, 1fr); }
    .examples { grid-template-columns: 1fr; }
  }
  @media (max-width: 720px) {
    section { padding: 76px 0; }
    .hero { padding-top: 120px; }
    .menu-btn { display: block; }
    nav { position: absolute; top: 72px; left: 0; right: 0; background: #fff; color: var(--ink); box-shadow: 0 12px 24px rgba(0,0,0,.08); display: none; }
    nav.open { display: block; }
    nav ul { flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 20px; }
    nav li a { display: block; padding: 14px 0; }
    .nav-cta { text-align: center; margin-top: 8px; }
    .promises, .services, .exp, .steps, .years, .cases, .facts { grid-template-columns: 1fr; }
    .anything { padding: 32px 24px; }
    .ba, .sols { grid-template-columns: 1fr; }
    .tri-card { padding: 24px 18px; }
    .node b { font-size: 12px; padding: 6px 2px; }
    .tri .center { font-size: 14px; }
    .flow { grid-template-columns: 1fr; }
    .example { padding: 28px 22px; }
    .example dl div { grid-template-columns: 1fr; gap: 4px; }
    .promise, .site-body { padding: 32px 26px; }
    .tech-row { grid-template-columns: 1fr; gap: 10px; }
    .history li { grid-template-columns: 1fr; gap: 2px; }
  }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .slides img, .slides img.on { animation: none; transform: none; }
  }

  /* multi-page additions */
  .tri-one { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 40px; border-radius: 24px; background: #fff; border: 1px solid var(--line); }
  .tri-one .tri { margin: 0 auto; width: 100%; }
  .node.ico { padding-top: 14px; text-align: center; }
  .node.ico img { width: 46%; aspect-ratio: 1; object-fit: contain; margin: 0 auto; }
  .tri-one .legend > div:first-child { border-top: 0; }
  @media (max-width: 1000px) { .tri-one { grid-template-columns: 1fr; padding: 28px 20px; gap: 28px; } }
  .contact-mail { margin: 22px auto 0 !important; color: var(--sky) !important; font-weight: 600; font-size: 17px !important; letter-spacing: .01em; }
  nav a.cur { opacity: 1; color: var(--blue); }
  .page-head { padding: 150px 0 70px; background:
      radial-gradient(700px 420px at 86% 20%, rgba(77,141,240,.2), transparent 65%),
      linear-gradient(180deg, #f2f6fe 0%, #ffffff 100%); }
  .page-head h1 { font-size: clamp(32px, 4.4vw, 52px); letter-spacing: -.035em; line-height: 1.2; font-weight: 800; }
  .page-head p { margin-top: 18px; max-width: 720px; color: var(--muted); font-size: clamp(16px, 1.5vw, 18.5px); }
  .teasers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .teaser { display: block; padding: 34px 30px; border-radius: 20px; background: #fff; border: 1px solid var(--line); transition: transform .25s, box-shadow .25s, border-color .25s; }
  .teaser:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -18px rgba(15,82,186,.35); border-color: transparent; }
  .teaser h3 { font-size: 22px; letter-spacing: -.02em; margin-bottom: 8px; }
  .teaser p { color: var(--muted); font-size: 15.5px; }
  .teaser .more, .more-link { display: inline-block; margin-top: 18px; font-weight: 700; color: var(--blue); font-size: 15px; }
  .work-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .work { display: block; border-radius: 18px; overflow: hidden; background: #fff; border: 1px solid var(--line); transition: transform .25s, box-shadow .25s; }
  .work:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -18px rgba(15,82,186,.35); }
  .work img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top center; }
  .work div { padding: 18px 20px 22px; }
  .work small { color: var(--blue); font-weight: 700; font-size: 12.5px; }
  .work b { display: block; font-size: 17.5px; letter-spacing: -.02em; }
  .center-link { text-align: center; margin-top: 36px; }
  .btn-line { border: 1px solid #cfd8e6; background: #fff; color: var(--ink); }
  .intro { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 24px; }
  .intro li { padding: 30px 28px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
  .intro b { display: block; font-size: 19px; letter-spacing: -.02em; margin-bottom: 6px; }
  .intro span { color: var(--muted); font-size: 15.5px; }
  @media (max-width: 1000px) { .teasers, .work-grid, .intro { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 720px) { .teasers, .work-grid, .intro { grid-template-columns: 1fr; } .page-head { padding: 120px 0 50px; } }

  /* core business: real examples under the generic diagram */
  .egs { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .eg { padding: 28px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
  .eg h4 { font-size: 20px; letter-spacing: -.02em; }
  .eg > p { color: var(--muted); font-size: 15px; margin-bottom: 18px; }
  .eg-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .eg figure { border-radius: 10px; overflow: hidden; border: 1px solid var(--line); border-top: 4px solid var(--blue); background: #fff; }
  .eg figure.c2 { border-top-color: #d6457a; }
  .eg figure.c3 { border-top-color: #1aa868; }
  .eg img { width: 100%; aspect-ratio: 16 / 11; object-fit: cover; object-position: top center; }
  .eg figcaption { padding: 8px 10px 10px; font-size: 13.5px; font-weight: 700; letter-spacing: -.02em; line-height: 1.35; }
  .eg figcaption small { display: block; font-size: 11.5px; font-weight: 700; color: var(--muted); }
  @media (max-width: 1000px) { .egs { grid-template-columns: 1fr; } }
  @media (max-width: 480px) { .eg { padding: 20px 16px; } .eg-row { gap: 8px; } .eg figcaption { font-size: 12px; padding: 6px; } }

  /* home: in-progress ribbon */
  .work { position: relative; }
  .ribbon { position: absolute; left: 12px; top: 12px; z-index: 2; padding: 5px 12px; border-radius: 999px; background: #ff7a1a; color: #fff; font-size: 12.5px; font-weight: 700; box-shadow: 0 6px 14px -6px rgba(0,0,0,.45); }

  /* core business: workload relief */
  .reliefs { display: grid; gap: 20px; }
  .relief { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; padding: 28px; border-radius: 24px; background: #fff; border: 1px solid var(--line); }
  .relief:nth-child(even) .relief-img { order: 2; }
  .relief-img { border-radius: 14px; overflow: hidden; border: 1px solid var(--line); background: #fff; box-shadow: 0 18px 34px -22px rgba(15,42,94,.45); }
  .relief-img img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top center; }
  .relief small { color: var(--blue); font-weight: 700; font-size: 13px; }
  .relief h4 { font-size: 23px; letter-spacing: -.02em; margin: 4px 0 10px; }
  .relief p { color: var(--muted); font-size: 15.5px; margin-bottom: 14px; }
  .relief li { position: relative; padding-left: 22px; font-size: 15px; color: #33415a; margin-bottom: 4px; }
  .relief li::before { content: "✓"; position: absolute; left: 0; color: #1aa868; font-weight: 800; }
  .sheet { font-size: 13px; }
  .sheet-bar { display: flex; align-items: center; gap: 8px; padding: 10px 12px; background: #f3f6fb; border-bottom: 1px solid var(--line); }
  .sheet-bar span { padding: 4px 10px; border-radius: 6px; background: #fff; border: 1px solid var(--line); font-weight: 600; }
  .sheet-bar em { margin-left: auto; font-style: normal; color: #1aa868; font-weight: 700; }
  .sheet table { width: 100%; border-collapse: collapse; }
  .sheet th { background: #f3f6fb; color: #7a879b; font-weight: 600; width: 34px; text-align: center; }
  .sheet th, .sheet td { border: 1px solid #e3e8f0; padding: 8px 10px; }
  .sheet thead tr:last-child td { font-weight: 700; background: #eaf1fe; color: var(--navy-2); }
  .sheet td.num { text-align: right; font-variant-numeric: tabular-nums; }
  .sheet td.sel { outline: 2px solid var(--blue); outline-offset: -2px; background: #f0f6ff; }
  .sheet .st { padding: 2px 8px; border-radius: 999px; background: #eef2f8; font-size: 12px; font-weight: 600; }
  .relief-more { margin-top: 20px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .relief-more li { padding: 20px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); color: var(--muted); font-size: 14.5px; }
  .relief-more b { display: block; color: var(--ink); font-size: 16px; letter-spacing: -.02em; margin-bottom: 2px; }
  @media (max-width: 1000px) { .relief { grid-template-columns: 1fr; gap: 22px; padding: 22px; } .relief:nth-child(even) .relief-img { order: 0; } .relief-more { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 720px) { .relief-more { grid-template-columns: 1fr; } .sheet { font-size: 11.5px; } .sheet th, .sheet td { padding: 6px; } .sheet-bar span:nth-child(n+2) { display: none; } }

  /* footer: copyright only */
  footer .wrap { justify-content: center; }

  /* keep things still: no lift on hover */
  .promise:hover, .teaser:hover, .work:hover, .btn:hover, .strength:hover { transform: none; }

  /* workload relief images: show the whole capture */
  .relief-img img { aspect-ratio: auto; height: auto; }

  /* home: company section */
  #company { padding: 90px 0; }
  .company { padding: 44px; border-radius: 28px; background: linear-gradient(150deg, #eaf1fe 0%, #f4fbfa 100%); border: 1px solid var(--line); }
  .company-top { display: grid; grid-template-columns: auto 1fr auto; gap: 28px; align-items: center; }
  .company-top > img { width: 84px; height: 84px; }
  .company h2 { font-size: clamp(24px, 2.6vw, 32px); letter-spacing: -.03em; }
  .company p { color: var(--muted); margin-top: 8px; font-size: 16.5px; max-width: 680px; }
  .company .eyebrow { margin-bottom: 6px; }
  .mini-tl { position: relative; margin-top: 40px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
  .mini-tl::before { content: ""; position: absolute; left: 8px; right: 8px; top: 7px; height: 2px; background: #cdd9ee; }
  .mini-tl li { position: relative; padding-top: 28px; }
  .mini-tl li::before { content: ""; position: absolute; left: 0; top: 0; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 4px solid var(--blue); }
  .mini-tl time { display: block; font-size: 22px; font-weight: 800; color: var(--blue); letter-spacing: -.02em; line-height: 1.1; }
  .mini-tl b { display: block; margin-top: 6px; font-size: 16px; letter-spacing: -.02em; }
  .mini-tl span { display: block; color: var(--muted); font-size: 14px; }
  .orgs { margin-top: 36px; padding-top: 24px; border-top: 1px solid #d7e1f2; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
  .orgs b { margin-right: 10px; font-size: 14.5px; color: var(--navy-2); }
  .orgs span { padding: 7px 14px; border-radius: 999px; background: #fff; border: 1px solid var(--line); font-weight: 600; font-size: 14.5px; }
  @media (max-width: 900px) {
    .company { padding: 30px 24px; }
    .company-top { grid-template-columns: 1fr; gap: 18px; }
    .company-top .btn { justify-self: start; }
    .mini-tl { grid-template-columns: 1fr; gap: 0; margin-top: 30px; }
    .mini-tl::before { left: 7px; right: auto; top: 8px; bottom: 8px; width: 2px; height: auto; }
    .mini-tl li { padding: 0 0 22px 34px; }
  }

  /* about: case cards sit directly on the section, no outer box */
  .anything { margin-top: 64px; padding: 0; border: 0; border-radius: 0; background: none; }

  /* core business examples: what each system does */
  .eg > p { margin-bottom: 14px; }
  .eg-roles { margin-bottom: 20px; border-top: 1px solid var(--line); }
  .eg-roles li { position: relative; padding: 12px 0 12px 20px; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 150px 1fr; gap: 12px; font-size: 14.5px; }
  .eg-roles li::before { content: ""; position: absolute; left: 0; top: 19px; width: 10px; height: 10px; border-radius: 50%; background: var(--blue); }
  .eg-roles li.c2::before { background: #d6457a; }
  .eg-roles li.c3::before { background: #1aa868; }
  .eg-roles b { letter-spacing: -.02em; }
  .eg-roles span { color: var(--muted); }
  @media (max-width: 560px) { .eg-roles li { grid-template-columns: 1fr; gap: 2px; } }

  /* workload relief: moving screens */
  .relief-img video { display: block; width: 100%; height: auto; }
  .relief-more li { display: grid; grid-template-columns: 44px 1fr; column-gap: 14px; align-items: center; }
  .relief-more img { grid-row: span 2; width: 44px; height: 44px; }
  .relief-more b { align-self: end; }
  .sheet.anim tbody tr { animation: rowin 7s infinite both; }
  .sheet.anim tbody tr:nth-child(1) { animation-delay: 0s; }
  .sheet.anim tbody tr:nth-child(2) { animation-delay: .35s; }
  .sheet.anim tbody tr:nth-child(3) { animation-delay: .7s; }
  .sheet.anim tbody tr:nth-child(4) { animation-delay: 1.05s; }
  .sheet.anim tbody tr:nth-child(5) { animation-delay: 1.4s; }
  @keyframes rowin { 0%, 6% { opacity: 0; background: #fff7d6; } 12% { opacity: 1; background: #fff7d6; } 24%, 100% { opacity: 1; background: transparent; } }
  .sheet.anim .sheet-bar span:first-child { animation: press 7s infinite; }
  @keyframes press { 0%, 3% { background: var(--blue); color: #fff; } 10%, 100% { background: #fff; color: inherit; } }
  .sheet.anim td.sel { animation: cell 7s infinite; }
  @keyframes cell { 0%, 45% { outline-color: transparent; background: transparent; } 50%, 100% { outline-color: var(--blue); background: #f0f6ff; } }
  .sheet.anim .sheet-bar em { animation: saved 7s infinite; }
  @keyframes saved { 0%, 55% { opacity: 0; } 62%, 100% { opacity: 1; } }
  @media (prefers-reduced-motion: reduce) { .sheet.anim * { animation: none !important; } }

  /* about: who this is for */
  .fit { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .fit li { position: relative; padding: 24px 26px 24px 62px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); }
  .fit li::before { content: "✓"; position: absolute; left: 24px; top: 24px; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; background: #e8f0fd; color: var(--blue); font-weight: 800; font-size: 14px; }
  .fit b { display: block; font-size: 17px; letter-spacing: -.02em; }
  .fit span { display: block; margin-top: 4px; color: var(--muted); font-size: 15px; }
  .soft .fit li { background: #fff; }
  @media (max-width: 800px) { .fit { grid-template-columns: 1fr; } }

  /* about: who this is for — customer voice + answer */
  .voices { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .voices > li { padding: 28px; border-radius: 20px; background: #fff; border: 1px solid var(--line); }
  .voice { display: grid; grid-template-columns: 76px 1fr; gap: 18px; align-items: start; }
  .voice figure { text-align: center; }
  .voice img { width: 64px; height: 64px; margin: 0 auto; padding: 6px; border-radius: 50%; background: #eef3fc; }
  .voice figcaption { margin-top: 6px; font-size: 12px; font-weight: 600; color: var(--muted); line-height: 1.3; }
  .voice blockquote { position: relative; margin-top: 4px; padding: 16px 20px; border-radius: 4px 18px 18px 18px; background: var(--bg-soft); border: 1px solid var(--line); font-size: 17px; font-weight: 600; letter-spacing: -.02em; line-height: 1.5; }
  .voice blockquote::before { content: "“"; margin-right: 2px; color: var(--blue-light); font-weight: 800; }
  .voice blockquote::after { content: "”"; margin-left: 2px; color: var(--blue-light); font-weight: 800; }
  .soft .voice blockquote { background: #f4f7fc; }
  .answer { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); color: #33415a; font-size: 15.5px; display: grid; grid-template-columns: 76px 1fr; gap: 18px; }
  .answer b { justify-self: center; align-self: start; padding: 3px 10px; border-radius: 999px; background: var(--blue); color: #fff; font-size: 12.5px; white-space: nowrap; }
  @media (max-width: 860px) { .voices { grid-template-columns: 1fr; } }
  @media (max-width: 480px) { .voices > li { padding: 22px 18px; } .voice, .answer { grid-template-columns: 64px 1fr; gap: 12px; } .voice blockquote { font-size: 15.5px; padding: 12px 14px; } }

  /* about: question on the left, SAFIRE's answer on the right */
  .talk { display: grid; gap: 44px; max-width: 1040px; margin-inline: auto; }
  .talk > li { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
  .talk figure { flex: none; width: 112px; text-align: center; }
  .talk figure img { width: 104px; height: 104px; margin: 0 auto; }
  .talk figcaption { margin-top: 4px; font-size: 13px; font-weight: 700; color: var(--muted); }
  .talk .who, .talk .sa { display: flex; align-items: flex-start; gap: 14px; }
  .talk blockquote, .talk .sa p { margin-top: 18px; padding: 18px 22px; font-size: 17px; letter-spacing: -.02em; line-height: 1.5; }
  .talk blockquote { border-radius: 6px 22px 22px 22px; background: #fff; border: 1px solid var(--line); font-weight: 600; box-shadow: 0 12px 26px -20px rgba(15,42,94,.5); }
  .talk .sa { justify-content: flex-end; margin-top: 56px; opacity: 0; transform: translateY(14px); transition: opacity .6s .5s, transform .6s .5s; }
  .talk li.in .sa { opacity: 1; transform: none; }
  .talk .sa p { border-radius: 22px 6px 22px 22px; background: var(--blue); color: #fff; font-weight: 500; }
  .talk .sa figcaption { color: var(--blue); }
  @media (max-width: 860px) {
    .talk { gap: 36px; }
    .talk > li { grid-template-columns: 1fr; gap: 10px; }
    .talk .sa { margin-top: 0; }
    .talk figure { width: 84px; } .talk figure img { width: 76px; height: 76px; }
    .talk blockquote, .talk .sa p { font-size: 15.5px; padding: 14px 16px; margin-top: 10px; }
  }
  @media (prefers-reduced-motion: reduce) { .talk .sa { opacity: 1; transform: none; transition: none; } }

  /* works: no zoom effect on the screenshots, they just sit still */
  .slides img, .slides img.on { transform: none; animation: none; }

  /* about talk: three exchanges, tighter */
  .talk { gap: 28px; }
  .talk .sa { margin-top: 40px; }
  #fit .sec-head { margin-bottom: 40px; }

  /* about talk: bubbles appear one at a time, question then answer */
  .talk.reveal { opacity: 1; transform: none; }
  .talk .who, .talk .sa { opacity: 0; transform: translateY(14px); transition: opacity .5s, transform .5s; }
  .talk.in .who, .talk.in .sa { opacity: 1; transform: none; }
  .talk > li:nth-child(1) .who { transition-delay: .2s; }
  .talk > li:nth-child(1) .sa  { transition-delay: 1.1s; }
  .talk > li:nth-child(2) .who { transition-delay: 2.0s; }
  .talk > li:nth-child(2) .sa  { transition-delay: 2.9s; }
  .talk > li:nth-child(3) .who { transition-delay: 3.8s; }
  .talk > li:nth-child(3) .sa  { transition-delay: 4.7s; }
  @media (prefers-reduced-motion: reduce) { .talk .who, .talk .sa { opacity: 1; transform: none; transition: none; } }

  /* about: case studies */
  .cases-wrap .core-sub { margin-top: 72px; }
  .case-list { display: grid; gap: 20px; }
  .case { display: grid; grid-template-columns: 360px 1fr; background: #fff; border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
  .case-img { background: #dfe6f1; min-height: 230px; position: relative; }
  .case-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top center; }
  .case-body { padding: 30px 34px; }
  .case-body small { color: var(--blue); font-weight: 700; font-size: 13px; }
  .case-body h4 { font-size: 23px; letter-spacing: -.02em; margin: 2px 0 16px; }
  .case-body p { position: relative; padding-left: 58px; font-size: 15.5px; margin-bottom: 10px; max-width: none; }
  .case-body p::before { position: absolute; left: 0; top: 1px; width: 44px; text-align: center; padding: 2px 0; border-radius: 6px; font-size: 12.5px; font-weight: 700; }
  .case-body .task { color: var(--muted); }
  .case-body .task::before { content: "과제"; background: #eceff4; color: #5d6b82; }
  .case-body .done { color: var(--ink); font-weight: 500; }
  .case-body .done::before { content: "수행"; background: var(--blue); color: #fff; }
  .case-body .chips { margin-top: 16px; padding-left: 58px; }
  @media (max-width: 860px) {
    .case { grid-template-columns: 1fr; }
    .case-img { min-height: 0; aspect-ratio: 16 / 9; }
    .case-body { padding: 24px 22px; }
    .case-body .chips { padding-left: 0; }
  }

  /* home, option B: intro video as the hero */
  .hero-video { padding-top: 130px; }
  .hv-head { max-width: 980px; margin: 0 auto 40px; text-align: center; }
  .hero-video h1 { font-size: clamp(30px, 3.6vw, 48px); }
  .hero-video .hv-head p { margin: 18px auto 0; max-width: 760px; }
  .hv-frame { max-width: 1080px; margin: 0 auto; border-radius: 22px; overflow: hidden; background: #000; box-shadow: 0 40px 80px -30px rgba(15,42,94,.6), 0 0 0 1px var(--line); }
  .hv-frame video { display: block; width: 100%; aspect-ratio: 16 / 9; }
  .hv-btns { justify-content: center; margin-top: 34px; }
  .hero-video .facts { margin-top: 48px; }