*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
  :root {
    --w: #ffffff; --cream: #f4efe9; --soft: #f8f5f2; --warm: #f1ece6;
    --dark: #1c1b19; --mid: #6b6762; --light: #a5a09a; --line: #e3dcd5; --gold: #c3a679;
  }
  html { scroll-behavior: smooth; }
  body { font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif; color: var(--dark); background: var(--w); -webkit-font-smoothing: antialiased; line-height: 1; overflow-x: hidden; }
  .page-wrap { max-width: 1420px; margin: 0 auto; padding-bottom: 100px; }
  a { text-decoration: none; color: inherit; }
  header {
    position: fixed; inset: 0 0 auto 0; z-index: 200;
    height: 64px; padding: 0 52px;
    display: flex; align-items: center; justify-content: space-between;
    background: rgba(255,255,255,.97); backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,.07);
    transition: background .35s ease, border-color .35s ease;
  }
  .logo img { height: 36px; width: auto; display: block; }
  header nav { display: flex; gap: 32px; }
  header nav a { font-size: 13px; letter-spacing: .02em; transition: color .2s; }
  header nav a:hover, header nav a.active { color: var(--gold); }
  .h-right { display: flex; align-items: center; gap: 16px; }
  .h-login { font-size: 12px; color: var(--mid); }
  .h-book {
    font-size: 11.5px; letter-spacing: .06em;
    background: var(--dark); color: #fff;
    padding: 9px 22px; border-radius: 100px; transition: background .25s;
  }
  .h-book:hover { background: var(--gold); }
  .intro { margin-top: 64px; padding: 88px 0 80px; background: var(--w); scroll-margin-top: 96px; }
  .intro-label { font-family: 'Montserrat', sans-serif; font-size: 28px; font-weight: 700; line-height: 28.435px; color: #BC8B55; display: block; margin-bottom: 20px; }
  .intro h1 { font-family: 'Pretendard', sans-serif; font-size: clamp(30px,4.51vw,65px); font-weight: 600; line-height: 1.167; margin-bottom: 18px; }
  .intro p { font-family: 'Pretendard', sans-serif; font-size: 25px; font-weight: 400; line-height: 42.653px; color: #000; }
  .doctor-sec { display: grid; grid-template-columns: 1fr 1fr; scroll-margin-top: 96px; }
  .doc-photo { overflow: hidden; width: 100%; max-width: 650px; aspect-ratio: 1/1; border-radius: 15px; }
  .doc-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
  .doc-body { padding: 80px 72px; background: url('../public/images/back_about.jpg') center/100% no-repeat; display: flex; flex-direction: column; justify-content: center; }
  .doc-sub { font-family: 'Inter', sans-serif; font-size: 28px; font-weight: 500; color: #182496; letter-spacing: .02em; margin-bottom: 16px; }
  .doc-body h2 { font-family: 'Pretendard', sans-serif; font-size: clamp(24px,3.47vw,50px); font-weight: 700; line-height: 1.15; margin-bottom: 24px; }
  .doc-body p { font-size: 22px; line-height: 1.6; color: var(--mid); }
  .doc-rule { width: 32px; height: 1px; background: var(--gold); margin: 28px 0; }

  .diff-sec { display: grid; grid-template-columns: 1fr 1fr; }
  .diff-body { padding: 80px 72px; background: var(--w); display: flex; flex-direction: column; justify-content: center; }
  .en-cap { font-family: 'Inter', sans-serif;  font-size: 24px; letter-spacing: .04em; color: var(--light); display: block; margin-bottom: 16px; }
  .diff-body h2 { font-family: 'Pretendard', sans-serif; font-size: clamp(24px,3.47vw,50px); font-weight: 700; line-height: 1.25; margin-bottom: 28px; }
  .diff-rule { width: 100%; height: 1px; background: var(--dark); margin: 28px 0; }
  .diff-body p { font-size: 22px; line-height: 1.8; color: var(--mid); }
  .patient-photo { overflow: hidden; width: 100%; max-width: 650px; aspect-ratio: 1/1; margin-left: auto; border-radius: 15px; align-self: start; }
  .patient-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }

  .honest-sec { display: grid; grid-template-columns: 1fr 1fr; }
  .device-photo { overflow: hidden; width: 100%; max-width: 650px; aspect-ratio: 1/1; border-radius: 15px; }
  .device-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
  .honest-body { padding: 80px 72px; background: var(--w); display: flex; flex-direction: column; justify-content: center; }
  .honest-body .en-cap { margin-bottom: 16px; }
  .honest-body h2 { font-family: 'Pretendard', sans-serif; font-size: clamp(24px,3.47vw,50px); font-weight: 700; line-height: 1.25; margin-bottom: 28px; }
  .honest-body p { font-size: 22px; line-height: 1.8; color: var(--mid); }

  /* ── Scroll fade-up ── */
  .fade-up { opacity: 0; transform: translateY(40px); transition: opacity .7s ease, transform .7s ease; }
  .fade-up.on { opacity: 1; transform: translateY(0); }
  .fade-up:nth-child(2) { transition-delay: .12s; }
  .fade-up:nth-child(3) { transition-delay: .22s; }
  /* contact */
  .contact { padding: 288px 80px 88px; background: #fff; }
  .contact-grid { display: grid; grid-template-columns: 1fr 1.1fr 1.2fr; gap: 60px; align-items: start; }
  .contact-left h3 { font-family: 'Pretendard', sans-serif; font-size: 36px; font-weight: 700; margin-bottom: 28px; }
  .c-phone { font-family: 'Pretendard', sans-serif; font-size: 28px; font-weight: 400; letter-spacing: .02em; margin-bottom: 28px; color: var(--dark); }
  .c-phone span { font-size: 13px; font-weight: 400; color: var(--light); display: block; margin-bottom: 6px; letter-spacing: .04em; }
  .c-rows { border-top: 1px solid var(--line); }
  .c-row { display: grid; grid-template-columns: 68px 1fr; gap: 16px; padding: 15px 0; border-bottom: 1px solid var(--line); }
  .c-lbl { font-size: 11.5px; color: var(--light); padding-top: 1px; }
  .c-val { font-size: 13px; color: var(--mid); line-height: 1.9; }
  .c-form { display: flex; flex-direction: column; gap: 10px; }
  .c-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .c-field { display: flex; flex-direction: column; gap: 6px; }
  .c-field label { font-size: 11.5px; color: var(--light); letter-spacing: .04em; }
  .c-field label span { color: #c00; }
  .c-field input, .c-field textarea { width: 100%; padding: 11px 14px; border: 1px solid var(--line); background: #fafafa; font-family: 'Pretendard', sans-serif; font-size: 13px; color: var(--dark); outline: none; transition: border .2s; resize: none; box-sizing: border-box; }
  .c-field input::placeholder, .c-field textarea::placeholder { color: #bbb; }
  .c-field input:focus, .c-field textarea:focus { border-color: var(--dark); background: #fff; }
  .c-field textarea { height: 110px; }
  .c-agree { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-top: 4px; }
  .c-agree-left { display: flex; align-items: center; gap: 8px; }
  .c-agree input[type=checkbox] { width: 14px; height: 14px; accent-color: var(--dark); cursor: pointer; }
  .c-agree-txt { font-size: 12px; color: var(--mid); }
  .c-agree-more { font-size: 11.5px; color: var(--light); border-bottom: 1px solid var(--line); cursor: pointer; white-space: nowrap; }
  .c-submit { width: 100%; padding: 15px; background: var(--dark); color: #fff; font-family: 'Pretendard', sans-serif; font-size: 13px; letter-spacing: .08em; border: none; cursor: pointer; transition: background .2s; margin-top: 4px; }
  .c-submit:hover { background: #333; }
  .map-box { height: 100%; min-height: 320px; overflow: hidden; }
footer { background: var(--dark); color: rgba(255,255,255,.56); padding: 36px 52px 28px; }
  .ft-top { display: flex; justify-content: space-between; align-items: center; padding-bottom: 20px; margin-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,.1); }
  .ft-logo { font-family: 'Pretendard', sans-serif; font-size: 16px; font-weight: 400; letter-spacing: .1em; color: rgba(255,255,255,.82); }
  .ft-nav { display: flex; gap: 24px; }
.ft-nav a { font-size: 12px; color: rgba(255,255,255,.56); transition: color .2s; }
  .ft-nav a:hover { color: rgba(255,255,255,.82); }
  .ft-copy { font-size: 11px; }

  /* ── RESPONSIVE ── */
  @media (max-width: 1460px) {
    .page-wrap { padding-left: 40px; padding-right: 40px; }
  }

  @media (max-width: 768px) {
    header { padding: 0 20px; }
    .logo-en { display: none; }
    header nav { display: none; }
    .h-book { padding: 8px 14px; font-size: 11px; }

    .intro { padding: 56px 24px 48px; }
    .intro h1 { font-size: 30px; }
    .intro p { font-size: 13.5px; }

    .doctor-sec, .diff-sec, .honest-sec { grid-template-columns: 1fr; display: flex; flex-direction: column; }
    .diff-sec { flex-direction: column-reverse; }
    .doc-photo { max-width: 100%; }
    .patient-photo { max-width: 100%; margin-top: 0; }
    .device-photo { max-width: 100%; }
    .doc-body, .diff-body, .honest-body { padding: 48px 0; }
    .doc-body { background-image: none; }
    .doc-sub { font-size: 20px; }
    .doc-body h2, .diff-body h2 { font-size: 24px; }
    .honest-body h2 { font-size: 22px; }
    .doc-body p, .diff-body p, .honest-body p { font-size: 13px; }

    .contact { padding: 56px 24px; }
    .c-grid { grid-template-columns: 1fr; gap: 36px; }
    .c-phone { font-size: 28px; }
    .map-box { height: 220px; }

    footer { padding: 48px 24px 36px; }
    .ft-top { flex-direction: column; gap: 24px; }
    .ft-links { gap: 28px; }
    .ft-bottom { flex-direction: column; gap: 12px; align-items: flex-start; }
  }