:root {
  --mta-ink: #22313a;
  --mta-muted: #64737b;
  --mta-line: #d9e3e8;
  --mta-paper: #fffefa;
  --mta-soft: #f3f7f9;
  --mta-blue: #2467b2;
  --mta-blue-dark: #174b83;
  --mta-blue-soft: #eaf3fc;
  --mta-navy: #19323f;
  --mta-cyan: #52b8d8;
  --mta-white: #fff;
}

html { scroll-behavior: smooth; }
body { overflow-x: hidden; }

.mta-page {
  overflow: hidden;
  background: var(--mta-paper);
  color: var(--mta-ink);
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.9;
}

.mta-page * { box-sizing: border-box; }
.mta-page a { color: inherit; }
.mta-container { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.mta-pc-break { display: block; }

.mta-kicker {
  margin: 0 0 12px;
  color: var(--mta-blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
  line-height: 1.4;
  text-transform: uppercase;
}

.mta-hero {
  position: relative;
  padding: 98px 0 92px;
  overflow: hidden;
  background: var(--mta-navy);
  color: var(--mta-white);
}

.mta-hero::after {
  position: absolute;
  right: -11%;
  bottom: -55%;
  width: 720px;
  height: 720px;
  border: 1px solid rgba(111, 196, 225, .18);
  border-radius: 50%;
  content: "";
}

.mta-hero-decoration {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 78% 37%, rgba(71, 165, 205, .22), transparent 28%),
    linear-gradient(115deg, transparent 0 61%, rgba(255, 255, 255, .025) 61% 62%, transparent 62% 100%);
}

.mta-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 64px;
  align-items: center;
  min-height: 460px;
}

.mta-hero-copy { max-width: 620px; }
.mta-hero .mta-kicker { color: #93d5ea; }
.mta-hero h1 { margin: 0; font-size: clamp(40px, 4vw, 50px); font-weight: 800; letter-spacing: .01em; line-height: 1.3; white-space: nowrap; }
.mta-lead { margin: 28px 0 0; color: rgba(255, 255, 255, .88); font-size: 18px; line-height: 2; }
.mta-hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }

.mta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.4;
  text-decoration: none;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

.mta-button:hover { transform: translateY(-1px); }
.mta-button-primary { background: var(--mta-blue); color: var(--mta-white) !important; }
.mta-button-primary:hover { background: #2d78c8; }
.mta-button-secondary { border-color: rgba(255, 255, 255, .48); color: var(--mta-white) !important; }
.mta-button-secondary:hover { border-color: rgba(255, 255, 255, .8); background: rgba(255, 255, 255, .06); }

.mta-hero-visual { position: relative; transform: perspective(1000px) rotateY(-2deg); }
.mta-hero-visual::before { position: absolute; inset: 13% -8% -11% 10%; border-radius: 50%; background: rgba(50, 135, 184, .23); filter: blur(44px); content: ""; }

.mta-window {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 10px;
  background: #fbfdfe;
  box-shadow: 0 32px 80px rgba(0, 0, 0, .32);
  color: var(--mta-ink);
}

.mta-window-bar { display: flex; gap: 6px; align-items: center; min-height: 38px; padding: 0 15px; border-bottom: 1px solid #dce5e9; background: #edf2f4; }
.mta-window-bar span { width: 8px; height: 8px; border-radius: 50%; background: #9aabb3; }
.mta-window-bar p { margin: 0 0 0 8px; color: #718087; font-size: 10px; font-weight: 700; letter-spacing: .06em; }
.mta-window-status { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px 12px; }
.mta-live-badge { display: inline-flex; gap: 8px; align-items: center; color: var(--mta-blue-dark); font-size: 12px; font-weight: 800; }
.mta-live-badge i, .mta-product-top strong i { width: 8px; height: 8px; border-radius: 50%; background: #ef6a54; box-shadow: 0 0 0 5px rgba(239, 106, 84, .12); }
.mta-audio-source { color: #76868e; font-size: 11px; font-weight: 700; }
.mta-wave { display: flex; gap: 4px; align-items: center; height: 62px; margin: 0 20px; padding: 0 18px; border-radius: 5px; background: var(--mta-blue-soft); }
.mta-wave i { width: 4px; height: 13px; border-radius: 5px; background: var(--mta-blue); }
.mta-wave i:nth-child(2n) { height: 27px; }
.mta-wave i:nth-child(3n) { height: 39px; }
.mta-wave i:nth-child(5n) { height: 20px; }
.mta-transcript-lines { padding: 12px 20px 6px; }
.mta-transcript-lines p { margin: 0; padding: 11px 0; border-bottom: 1px solid #e7edef; font-size: 12px; line-height: 1.6; }
.mta-transcript-lines .mta-typing { color: #52636c; }
.mta-typing span, .mta-product-active span { display: inline-block; width: 2px; height: 1.1em; margin-left: 3px; background: var(--mta-blue); vertical-align: -.14em; }
.mta-window-tools { display: flex; gap: 8px; padding: 10px 20px 18px; }
.mta-window-tools span { padding: 5px 9px; border: 1px solid #cbd9df; border-radius: 3px; color: #526873; font-size: 9px; font-weight: 800; }

.mta-intro { padding: 72px 0; border-bottom: 1px solid var(--mta-line); background: var(--mta-white); }
.mta-intro-layout { display: grid; grid-template-columns: 1fr .9fr; gap: 80px; align-items: center; }
.mta-intro h2, .mta-section h2 { margin: 0; font-size: 31px; font-weight: 800; line-height: 1.48; }
.mta-intro-layout > p { margin: 0; color: var(--mta-muted); font-size: 16px; line-height: 2; }

.mta-section { padding: 90px 0; }
.mta-section-heading { max-width: 760px; margin-bottom: 42px; }
.mta-section-heading > p:last-child { margin: 16px 0 0; color: var(--mta-muted); line-height: 1.9; }
.mta-methods { background: var(--mta-paper); }
.mta-method-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }
.mta-method-card { position: relative; min-height: 440px; padding: 42px; overflow: hidden; border: 1px solid var(--mta-line); border-radius: 8px; background: var(--mta-white); }
.mta-method-card-live { border-top: 4px solid var(--mta-blue); }
.mta-method-number { position: absolute; right: 28px; top: 20px; color: #e8eef1; font-size: 64px; font-weight: 800; line-height: 1; }
.mta-method-icon { display: grid; place-items: center; width: 58px; height: 58px; border-radius: 50%; background: var(--mta-blue-soft); color: var(--mta-blue); }
.mta-method-icon svg { width: 29px; height: 29px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 2; }
.mta-card-kicker { margin: 24px 0 7px; color: var(--mta-blue); font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.mta-method-card h3 { margin: 0; font-size: 24px; line-height: 1.5; }
.mta-method-card > p:not(.mta-card-kicker) { margin: 18px 0 0; color: var(--mta-muted); }
.mta-method-card ul { margin: 22px 0 0; padding: 20px 0 0; border-top: 1px solid var(--mta-line); list-style: none; }
.mta-method-card li { position: relative; margin-top: 8px; padding-left: 20px; color: #485a63; }
.mta-method-card li:first-child { margin-top: 0; }
.mta-method-card li::before { position: absolute; left: 0; top: .7em; width: 7px; height: 4px; border-left: 2px solid var(--mta-blue); border-bottom: 2px solid var(--mta-blue); transform: rotate(-45deg); content: ""; }
.mta-method-note { margin: 24px 0 0; color: #77858c; font-size: 13px; }

.mta-experience { background: var(--mta-soft); }
.mta-experience-layout { display: grid; grid-template-columns: minmax(300px, .72fr) minmax(560px, 1.28fr); gap: 66px; align-items: center; }
.mta-experience-copy h2 { margin: 0; font-size: 31px; line-height: 1.48; }
.mta-experience-copy > p:not(.mta-kicker) { margin: 20px 0 0; color: var(--mta-muted); }
.mta-feature-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 25px; }
.mta-feature-tags span { padding: 5px 10px; border: 1px solid #cddae0; border-radius: 999px; background: var(--mta-white); color: #52656e; font-size: 12px; font-weight: 700; }

.mta-product-panel { overflow: hidden; border: 1px solid #ccd9df; border-radius: 8px; background: var(--mta-white); box-shadow: 0 22px 50px rgba(36, 62, 76, .12); }
.mta-product-top { display: flex; justify-content: space-between; align-items: center; padding: 18px 20px; border-bottom: 1px solid var(--mta-line); }
.mta-product-top small { display: block; color: #89979d; font-size: 10px; }
.mta-product-top strong { display: flex; gap: 8px; align-items: center; margin-top: 3px; color: #344852; font-size: 12px; }
.mta-stop-control { padding: 8px 12px; border-radius: 3px; background: #ee704e; color: #fff; font-size: 10px; font-weight: 800; }
.mta-product-toolbar { display: flex; gap: 7px; padding: 11px 20px; background: #f5f8fa; }
.mta-product-toolbar span { padding: 5px 9px; border-radius: 3px; background: var(--mta-blue); color: #fff; font-size: 9px; font-weight: 800; }
.mta-product-body { padding: 7px 20px 15px; }
.mta-product-body p { display: flex; gap: 12px; align-items: baseline; margin: 0; padding: 12px 0; border-bottom: 1px solid #e4eaed; color: #3c4c54; font-size: 12px; }
.mta-product-body p:last-child { border: 0; }
.mta-product-body i { color: #a2adb2; font-size: 9px; font-style: normal; }
.mta-product-active { background: linear-gradient(90deg, rgba(234, 243, 252, .65), transparent); }

.mta-custom { background: var(--mta-white); }
.mta-custom-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--mta-line); border-left: 1px solid var(--mta-line); }
.mta-custom-grid article { min-height: 230px; padding: 30px; border-right: 1px solid var(--mta-line); border-bottom: 1px solid var(--mta-line); }
.mta-custom-grid span { color: var(--mta-blue); font-size: 12px; font-weight: 800; }
.mta-custom-grid h3 { margin: 14px 0 0; font-size: 20px; }
.mta-custom-grid p { margin: 13px 0 0; color: var(--mta-muted); font-size: 14px; line-height: 1.9; }

@media (max-width: 960px) {
  .mta-hero { padding: 76px 0; }
  .mta-hero-layout { grid-template-columns: 1fr; gap: 48px; min-height: 0; }
  .mta-hero-copy { max-width: 700px; }
  .mta-hero-visual { width: min(680px, 100%); transform: none; }
  .mta-intro-layout { gap: 45px; }
  .mta-experience-layout { grid-template-columns: 1fr; }
  .mta-product-panel { width: min(720px, 100%); }
}

@media (max-width: 767px) {
  .mta-container { width: min(100% - 32px, 1160px); }
  .mta-pc-break { display: none; }
  .mta-hero { padding: 62px 0 58px; }
  .mta-hero::after { right: -65%; bottom: -28%; width: 520px; height: 520px; }
  .mta-hero h1 { font-size: 34px; white-space: normal; }
  .mta-lead { margin-top: 22px; font-size: 16px; }
  .mta-hero-actions { display: grid; margin-top: 30px; }
  .mta-button { width: 100%; }
  .mta-window-status { align-items: flex-start; }
  .mta-window-tools { overflow: hidden; }
  .mta-intro { padding: 56px 0; }
  .mta-intro-layout { grid-template-columns: 1fr; gap: 24px; }
  .mta-intro h2, .mta-section h2, .mta-experience-copy h2 { font-size: 26px; }
  .mta-section { padding: 66px 0; }
  .mta-section-heading { margin-bottom: 30px; }
  .mta-method-grid { grid-template-columns: 1fr; }
  .mta-method-card { min-height: 0; padding: 30px 24px; }
  .mta-method-number { right: 20px; font-size: 52px; }
  .mta-experience-layout { gap: 34px; }
  .mta-product-toolbar { overflow: hidden; padding-inline: 13px; }
  .mta-product-toolbar span { flex: 0 0 auto; }
  .mta-product-body { padding-inline: 14px; }
  .mta-product-body p { gap: 8px; font-size: 10px; }
  .mta-custom-grid { grid-template-columns: 1fr; }
  .mta-custom-grid article { min-height: 0; padding: 26px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mta-button { transition: none; }
}