:root {
    --green-deep: #053B27;
    --green-deep-soft: #0A4A32;
    --asibi-green: #2C8146;
    --asibi-green-deep: #1F6E3A;
    --paper: #F2E9DC;
    --paper-warm: #ECE1CF;
    --ink: #231F1A;
    --ink-soft: #4A453E;
    --ink-mute: #8C8579;
    --hairline: #DCD3C2;
    --gold: #C9A455;
    --gold-soft: #E4C988;
    --gold-ink: #A8842F;
    --cream-on-green: #F3ECDD;
    --line-green: #06C755;
    --line-green-h: #05B34C;
    --display: 'Shippori Mincho B1', serif;
    --serif: 'Zen Old Mincho', serif;
    --sans: 'Zen Old Mincho', serif;
    --logo-font: 'Shippori Mincho B1', serif;
    --max: 1080px;
    --navy: #16233C;
    --navy-deep: #0E1930;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }

  body {
    font-family: var(--serif);
    background: var(--paper);
    color: var(--ink);
    line-height: 2.0;
    font-size: 17px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
  }

  body::after {
    content: ''; position: fixed; inset: 0;
    background-image: url("/img/noise-texture.svg");
    opacity: 0.35; pointer-events: none; z-index: 1;
    mix-blend-mode: multiply;
  }

  strong { color: var(--ink); font-weight: 600; }
  em {
    font-style: normal;
    font-family: var(--display);
    color: var(--asibi-green);
    font-weight: 700;
  }
  ::selection { background: var(--green-deep); color: var(--paper); }
  h1, h2, h3, .h2 { word-break: auto-phrase; font-feature-settings: "palt"; text-spacing-trim: trim-start; }
  h2, h3, .h2 { text-wrap: balance; }
  p { word-break: auto-phrase; text-wrap: pretty; }
  :where(a, button, summary):focus-visible { outline: 2px solid var(--asibi-green-deep); outline-offset: 3px; }

  /* ============ LOGO (text) ============ */
  .logo-group {
    display: inline-flex;
    align-items: baseline;
    gap: 10px;
    text-decoration: none;
    color: var(--ink);
  }
  .logo-text {
    font-family: var(--logo-font);
    font-weight: 700;
    font-size: 21px;
    letter-spacing: 0.22em;
    color: var(--ink);
    line-height: 1;
  }
  .logo-sub {
    font-family: var(--serif);
    font-weight: 500;
    font-size: 11px;
    letter-spacing: 0.28em;
    color: var(--ink-soft);
  }

  /* ============ NAV ============ */
  .nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(250, 246, 238, 0.9);
    backdrop-filter: blur(20px) saturate(140%);
    border-bottom: 1px solid rgba(220, 211, 194, 0.5);
  }
  .nav-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 15px 32px;
    display: flex; align-items: center; justify-content: space-between;
  }
  .nav-meta {
    font-family: var(--serif);
    font-size: 12.5px;
    color: var(--ink-soft);
    letter-spacing: 0.12em;
    white-space: nowrap;
  }
  .logo-group { white-space: nowrap; }
  @media (max-width: 880px) {
    .nav-meta { font-size: 9.5px; letter-spacing: 0.06em; }
    .logo-sub { display: none; }
    .nav-inner { padding: 13px 20px; }
  }

  /* ============ HERO (deep green / per key visual) ============ */
  .hero-artwm {
    position: absolute; left: 2%; top: -4%;
    height: 108%; width: auto;
    opacity: .18;
    filter: grayscale(1) brightness(1.45) contrast(1.12);
    mix-blend-mode: luminosity;
    pointer-events: none; user-select: none;
    -webkit-mask-image: radial-gradient(78% 88% at 50% 46%, #000 42%, transparent 80%);
    mask-image: radial-gradient(78% 88% at 50% 46%, #000 42%, transparent 80%);
  }
  .hero-grid, .hero-cta-bar { position: relative; z-index: 1; }
  @media (max-width: 880px) {
    .hero-artwm { height: 66%; left: auto; right: -16%; top: -2%; opacity: .15; }
  }
  .hero {
    overflow: hidden;
    background: linear-gradient(175deg, #1B2B4A 0%, var(--navy) 45%, var(--navy-deep) 100%);
    color: var(--cream-on-green);
    padding: 140px 32px 0;
    position: relative;
    z-index: 2;
  }
  .hero em { color: var(--gold-soft); }
  .hero-grid {
    max-width: var(--max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 76px;
    align-items: start;
    padding-bottom: 24px;
  }
  .hero-copy {
    animation: heroFadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex; justify-content: flex-end;
  }
  .hero h1 { writing-mode: vertical-rl; display: block; }
  .hero-copy-line1 {
    font-family: var(--display);
    font-weight: 600;
    font-size: clamp(25px, 2.9vw, 36px);
    line-height: 1.95;
    letter-spacing: 0.14em;
    color: var(--cream-on-green);
  }
  .hero-copy-line2 {
    font-family: var(--display);
    font-weight: 700;
    font-size: clamp(29px, 3.6vw, 44px);
    line-height: 1.85;
    letter-spacing: 0.12em;
    color: var(--cream-on-green);
    margin-top: 34px;
  }
  .hero-copy-line2 .ai {
    font-family: var(--display);
    font-size: 1.28em;
    letter-spacing: 0;
    text-combine-upright: all;
    color: var(--gold-soft);
    font-weight: 700;
  }
  .hero-intro {
    animation: heroFadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.25s both;
  }
  .hero-intro h2 {
    font-family: var(--display);
    font-weight: 700;
    font-size: clamp(27px, 3.2vw, 40px);
    line-height: 1.75;
    letter-spacing: 0.06em;
    color: #FDFBF5;
  }
  .hero-intro-rule {
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, var(--gold), rgba(228, 201, 136, 0.25));
    margin: 26px 0 30px;
  }
  .hero-intro p {
    font-family: var(--serif);
    font-size: clamp(15.5px, 1.6vw, 18px);
    line-height: 2.45;
    letter-spacing: 0.05em;
    color: rgba(243, 236, 221, 0.93);
  }
  .hero-intro .q { color: var(--gold-soft); }
  .hero-declaration {
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid rgba(228, 201, 136, 0.35);
    font-family: var(--display);
    font-weight: 700;
    font-size: clamp(17px, 1.8vw, 21px);
    letter-spacing: 0.06em;
    line-height: 2.1;
    color: #FDFBF5;
  }
  .hero-declaration em { color: var(--gold-soft); }

  .hero-cta-bar {
    max-width: var(--max);
    margin: 0 auto;
    padding: 36px 0 84px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
    animation: heroFadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) 0.5s both;
  }
  .hero-cta-note {
    font-family: var(--serif);
    font-size: 14px;
    color: rgba(243, 236, 221, 0.8);
    letter-spacing: 0.05em;
  }
  .hero-cta-note strong { color: var(--gold-soft); font-weight: 600; }

  @keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  @media (max-width: 880px) {
    .hero { padding: 110px 28px 0; }
    .hero-grid { grid-template-columns: 1fr; gap: 48px; padding-bottom: 12px; }
    .hero-intro h2 br { display: none; }
    .hero-copy { justify-content: flex-start; }
    .hero h1 { writing-mode: horizontal-tb; }
    .hero-copy-line1 { letter-spacing: 0.07em; }
    .hero-copy-line2 { letter-spacing: 0.06em; }
    .hero-copy-line2 .ai { text-combine-upright: none; letter-spacing: 0.04em; }
  }
  @media (max-width: 640px) {
    .hero { padding: 100px 24px 0; }
    .hero-copy-line2 { margin-top: 24px; }
    .hero-cta-bar { padding: 28px 0 48px; flex-direction: column; gap: 16px; text-align: center; }
  }

  /* ============ CTA BUTTON ============ */
  .cta-btn {
    display: inline-flex; align-items: center; gap: 10px;
    background: var(--green-deep); color: var(--cream-on-green);
    text-decoration: none;
    font-family: var(--serif);
    font-size: 14px; font-weight: 600;
    padding: 16px 32px;
    border-radius: 999px;
    border: 1px solid var(--green-deep);
    transition: transform .18s ease, background .25s ease, box-shadow .25s ease;
    letter-spacing: 0.1em;
    position: relative;
  }
  .cta-btn:hover { background: var(--green-deep-soft); transform: translateY(-1px); box-shadow: 0 10px 26px -14px rgba(5, 59, 39, .7); }
  .cta-btn--paper { background: var(--paper); color: var(--green-deep); border-color: var(--paper); }
  .cta-btn--paper:hover { background: #fff; color: var(--green-deep); box-shadow: 0 10px 26px -14px rgba(20, 16, 11, .4); }
  .cta-btn span, .cta-btn svg { position: relative; z-index: 1; }
  .cta-btn svg { width: 20px; height: 20px; }

  /* ============ HOWTO（使い方はカンタン） ============ */
  .howto {
    background: var(--paper);
    padding: 96px 32px 100px;
    position: relative; z-index: 2;
  }
  .howto-inner { max-width: 760px; margin: 0 auto; }
  .howto-title {
    font-family: var(--display);
    font-weight: 700;
    font-size: clamp(28px, 4vw, 42px);
    letter-spacing: 0.08em;
    color: var(--green-deep);
    text-align: center;
    line-height: 1.6;
    margin-bottom: 56px;
  }
  .howto-row {
    display: grid;
    grid-template-columns: 64px 104px 1fr;
    align-items: center;
    gap: 0;
    padding: 26px 0;
  }
  .howto-num {
    width: 56px; height: 56px;
    border-radius: 50%;
    background: var(--green-deep);
    color: #FDFBF5;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--display);
    font-weight: 600;
    font-size: 24px;
    line-height: 1;
  }
  .howto-icon {
    display: flex;
    justify-content: center;
    padding: 0 16px;
  }
  .howto-icon svg {
    width: 64px; height: 64px;
    color: var(--green-deep);
  }
  .howto-text {
    font-family: var(--display);
    font-weight: 600;
    font-size: clamp(20px, 2.6vw, 28px);
    letter-spacing: 0.06em;
    color: var(--green-deep);
    border-left: 1px solid var(--gold-soft);
    padding-left: 36px;
    line-height: 1.7;
    min-height: 72px;
    display: flex;
    align-items: center;
  }
  @media (max-width: 640px) {
    .howto { padding: 72px 20px 76px; }
    .howto-row { grid-template-columns: 46px 62px 1fr; padding: 20px 0; }
    .howto-num { width: 40px; height: 40px; font-size: 18px; }
    .howto-icon { padding: 0 8px; }
    .howto-icon svg { width: 42px; height: 42px; }
    .howto-text { padding-left: 16px; min-height: 56px; font-size: 17.5px; letter-spacing: 0.03em; }
  }

  /* ============ chapter label ============ */
  .chapter {
    display: flex; align-items: center; gap: 12px;
    font-family: var(--serif);
    font-weight: 600;
    font-size: 13px;
    color: var(--asibi-green);
    letter-spacing: 0.22em;
    margin-bottom: 24px;
  }
  .chapter::before { content: ''; width: 24px; height: 1px; background: var(--gold); }
  .chapter-center { justify-content: center; }
  .chapter-center::after { content: ''; width: 24px; height: 1px; background: var(--gold); }

  .h2 {
    font-family: var(--display);
    font-size: clamp(27px, 4.2vw, 42px);
    font-weight: 700; line-height: 1.7;
    letter-spacing: 0.05em; color: var(--ink);
    margin-bottom: 32px;
  }

  /* ============ HIRAKU（二段階） ============ */
  .mikata {
    background: #F7F1E6;
    padding: 110px 32px 100px;
    position: relative; z-index: 2;
  }
  .mikata-inner { max-width: var(--max); margin: 0 auto; }
  .mikata-header { text-align: center; margin-bottom: 72px; }
  .mikata-header .h2 { margin-bottom: 0; }
  /* ============ PROBLEM ============ */
  .problem {
    background: var(--paper-warm);
    padding: 110px 32px;
    position: relative; z-index: 2;
  }
  .problem-inner {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
  }
  .problem-text {
    font-family: var(--serif);
    color: var(--ink-soft);
    font-size: clamp(17.5px, 2vw, 20px);
    line-height: 2.5;
  }
  .problem-text p { margin-bottom: 26px; }
  .problem-text p:last-child { margin-bottom: 0; }
  .problem-text strong { color: var(--ink); font-weight: 600; }

  /* ============ AUDIO EXAMPLE ============ */
  .example-section { padding: 100px 32px; position: relative; z-index: 2; background: var(--paper); }
  .example-inner { max-width: 780px; margin: 0 auto; }
  .example-header { text-align: center; margin-bottom: 56px; }
  .example-header .h2 { margin-bottom: 24px; }
  .example-header p { font-family: var(--serif); color: var(--ink-soft); font-size: 17.5px; line-height: 2.4; max-width: 620px; margin: 0 auto; }

  .audio-card {
    background: #FAF5EB; padding: 64px 56px; position: relative;
    border: 1px solid var(--hairline);
    border-top: 3px solid var(--green-deep);
    box-shadow: 0 30px 80px -30px rgba(28, 26, 23, 0.15);
  }
  .audio-meta {
    font-family: var(--serif);
    font-weight: 600;
    font-size: 13px; color: var(--asibi-green);
    letter-spacing: 0.14em; margin-bottom: 24px;
    display: flex; align-items: center; gap: 12px;
  }
  .audio-meta::before { content: ''; width: 24px; height: 1px; background: var(--asibi-green); }

  .audio-card-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 44px;
    align-items: start;
  }
  .audio-card-image { position: sticky; top: 100px; }
  .audio-card-painting, .artwork-img {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--hairline);
    box-shadow: 0 6px 20px rgba(28, 26, 23, 0.1);
  }
  .audio-card-image-caption {
    margin-top: 14px;
    font-family: var(--serif);
    font-size: 12px;
    color: var(--ink-mute);
    text-align: center;
    line-height: 1.8;
    letter-spacing: 0.04em;
  }
  .audio-card-text { min-width: 0; }
  @media (max-width: 720px) {
    .audio-card { padding: 44px 28px; }
    .audio-card-grid { grid-template-columns: 1fr; gap: 32px; }
    .audio-card-image { position: static; max-width: 280px; margin: 0 auto; }
  }

  .audio-preview {
    font-family: var(--serif);
    font-size: clamp(16.5px, 1.8vw, 19px);
    line-height: 2.5;
    color: var(--ink);
    margin-bottom: 16px;
  }
  .audio-details {
    margin-top: 8px;
    margin-bottom: 16px;
    border-top: 1px solid var(--hairline);
    padding-top: 16px;
  }
  .audio-details summary {
    font-family: var(--serif);
    font-size: 14px;
    font-weight: 600;
    color: var(--asibi-green);
    cursor: pointer;
    list-style: none;
    padding: 8px 0;
    letter-spacing: 0.06em;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color 0.2s;
  }
  .audio-details summary::-webkit-details-marker { display: none; }
  .audio-details summary::before {
    content: '▶';
    font-size: 10px;
    transition: transform 0.3s;
  }
  .audio-details[open] summary::before { transform: rotate(90deg); }
  .audio-details summary:hover { color: var(--asibi-green-deep); }
  .audio-full { padding-top: 16px; animation: fadeIn 0.4s ease; }
  .audio-full p {
    font-family: var(--serif);
    font-size: clamp(15.5px, 1.7vw, 17.5px);
    line-height: 2.5;
    color: var(--ink);
    margin-bottom: 20px;
  }
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .audio-players {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--hairline);
  }
  .audio-players-label {
    font-family: var(--serif);
    font-size: 14px;
    font-weight: 600;
    color: var(--asibi-green);
    letter-spacing: 0.12em;
    margin-bottom: 18px;
    text-align: center;
  }
  .player-row { display: flex; justify-content: center; gap: 20px; }
  .player-item { max-width: 360px; flex: 1; display: flex; justify-content: center; }

  .audio-player-button {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 20px;
    background: white;
    border: 1px solid var(--hairline);
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    max-width: 360px;
    font-family: var(--serif);
  }
  .audio-player-button:hover {
    border-color: var(--asibi-green);
    box-shadow: 0 8px 20px rgba(44, 129, 70, 0.1);
  }
  .audio-player-button svg {
    width: 22px; height: 22px;
    color: var(--asibi-green);
    flex-shrink: 0;
  }
  .audio-player-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex: 1;
  }
  .audio-player-label {
    font-size: 13px;
    color: var(--ink);
    font-weight: 600;
    letter-spacing: 0.06em;
  }
  .audio-player-time {
    font-size: 11px;
    color: var(--ink-mute);
    letter-spacing: 0.04em;
  }
  .audio-player-wave { display: flex; gap: 2px; align-items: center; height: 22px; }
  .audio-player-wave span {
    width: 2px;
    background: var(--ink-mute);
    border-radius: 1px;
    height: 30%;
    animation: waveBeat 1.2s ease-in-out infinite;
  }
  .audio-player-wave span:nth-child(1) { animation-delay: 0s; height: 30%; }
  .audio-player-wave span:nth-child(2) { animation-delay: 0.1s; height: 60%; }
  .audio-player-wave span:nth-child(3) { animation-delay: 0.2s; height: 80%; }
  .audio-player-wave span:nth-child(4) { animation-delay: 0.3s; height: 50%; }
  .audio-player-wave span:nth-child(5) { animation-delay: 0.4s; height: 90%; }
  .audio-player-wave span:nth-child(6) { animation-delay: 0.5s; height: 40%; }
  .audio-player-wave span:nth-child(7) { animation-delay: 0.6s; height: 70%; }
  .audio-player-wave span:nth-child(8) { animation-delay: 0.7s; height: 55%; }
  .audio-player-wave span:nth-child(9) { animation-delay: 0.8s; height: 85%; }
  .audio-player-wave span:nth-child(10) { animation-delay: 0.9s; height: 40%; }
  .audio-player-wave span:nth-child(11) { animation-delay: 1.0s; height: 65%; }
  .audio-player-wave span:nth-child(12) { animation-delay: 1.1s; height: 35%; }
  .audio-player-button:hover .audio-player-wave span { background: var(--asibi-green); }
  @keyframes waveBeat {
    0%, 100% { transform: scaleY(0.5); opacity: 0.5; }
    50% { transform: scaleY(1); opacity: 1; }
  }

  /* ============ inline CTA ============ */
  .inline-cta {
    text-align: center;
    padding: 48px 32px 88px;
    background: var(--paper);
    position: relative; z-index: 2;
  }
  .inline-cta-lead {
    font-family: var(--serif);
    font-size: 16px;
    color: var(--ink-soft);
    line-height: 2;
    margin-bottom: 24px;
    letter-spacing: 0.04em;
  }
  .inline-cta-note {
    font-family: var(--serif);
    font-size: 13px;
    color: var(--ink-mute);
    margin-top: 18px;
    letter-spacing: 0.05em;
  }
  .inline-cta-note strong { color: var(--asibi-green-deep); font-weight: 600; }
  @media (max-width: 640px) {
    .inline-cta { padding: 36px 24px 64px; }
    .inline-cta-lead { font-size: 15px; line-height: 1.9; }
  }

  /* ============ STATS (deep green band) ============ */
  .stats-section {
    background: linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
    color: var(--cream-on-green);
    padding: 84px 32px;
    position: relative; z-index: 2;
  }
  .stats-inner { max-width: var(--max); margin: 0 auto; }
  .stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .stat-item { text-align: center; padding: 16px 8px; }
  .stat-num {
    font-family: var(--display);
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 700;
    line-height: 1;
    color: var(--gold-soft);
    margin-bottom: 14px;
    letter-spacing: 0.02em;
  }
  .stat-num small {
    font-size: clamp(14px, 1.4vw, 18px);
    margin-left: 4px;
    color: var(--gold-soft);
    font-weight: 500;
  }
  .stat-label {
    font-family: var(--serif);
    font-size: 14.5px;
    color: rgba(243, 236, 221, 0.92);
    line-height: 1.7;
    letter-spacing: 0.05em;
  }
  .stat-detail {
    font-family: var(--serif);
    font-size: 12px;
    color: rgba(243, 236, 221, 0.55);
    line-height: 1.7;
    margin-top: 8px;
    letter-spacing: 0.05em;
  }
  @media (max-width: 768px) {
    .stats-grid { grid-template-columns: 1fr; gap: 28px; }
    .stats-section { padding: 60px 24px; }
  }

  /* ============ FEATURES ============ */
  .features-section { padding: 120px 32px; position: relative; z-index: 2; background: var(--paper); }
  .features-header { max-width: var(--max); margin: 0 auto 72px; }
  .features { max-width: var(--max); margin: 0 auto; display: flex; flex-direction: column; }
  .feature {
    display: grid; grid-template-columns: 110px 1fr;
    gap: 40px; padding: 52px 0;
    border-top: 1px solid var(--hairline);
    transition: background 0.4s;
    align-items: start;
  }
  .feature:last-child { border-bottom: 1px solid var(--hairline); }
  .feature:hover { background: rgba(236, 225, 207, 0.35); }
  .feature-num {
    font-family: var(--display);
    font-weight: 600;
    font-size: 30px;
    color: var(--gold-ink);
    letter-spacing: 0.05em;
    line-height: 1.4;
  }
  .feature-content h3 {
    font-family: var(--display);
    font-size: clamp(22px, 2.8vw, 28px);
    font-weight: 700; margin-bottom: 26px;
    letter-spacing: 0.05em; line-height: 1.6; color: var(--ink);
  }
  .feature-content p { font-family: var(--serif); color: var(--ink-soft); font-size: 17px; line-height: 2.4; }
  .feature-content p + p { margin-top: 16px; }
  @media (max-width: 640px) {
    .features-section { padding: 80px 28px; }
    .feature { grid-template-columns: 1fr; gap: 12px; padding: 40px 0; }
    .feature-num { font-size: 22px; }
  }

  /* ============ ZUROKU ============ */
  .zuroku { background: var(--paper-warm); padding: 100px 32px; text-align: center; position: relative; z-index: 2; }
  .zuroku-inner { max-width: 760px; margin: 0 auto; }
  .zuroku h2 { font-family: var(--display); font-size: clamp(27px, 4vw, 38px); font-weight: 700; line-height: 1.7; margin-bottom: 36px; letter-spacing: 0.05em; }
  .zuroku p { font-family: var(--serif); font-size: 18px; color: var(--ink-soft); line-height: 2.5; }

  /* ============ FAQ ============ */
  .faq-section { background: var(--paper); padding: 100px 32px; position: relative; z-index: 2; }
  .faq-inner { max-width: 760px; margin: 0 auto; }
  .faq-inner .h2 { text-align: center; margin-bottom: 64px; }
  .faq-list { display: flex; flex-direction: column; }
  .faq-item {
    border-top: 1px solid var(--hairline);
    background: transparent;
    transition: background 0.3s;
  }
  .faq-item:last-child { border-bottom: 1px solid var(--hairline); }
  .faq-item summary {
    font-family: var(--serif);
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
    padding: 28px 44px 28px 0;
    cursor: pointer;
    list-style: none;
    position: relative;
    line-height: 1.6;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::after {
    content: '+';
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 26px;
    font-weight: 300;
    color: var(--asibi-green);
    transition: transform 0.3s;
  }
  .faq-item[open] summary::after { content: '−'; }
  .faq-item[open] summary { color: var(--asibi-green-deep); }
  .faq-body {
    font-family: var(--serif);
    font-size: 15.5px;
    line-height: 2.2;
    color: var(--ink-soft);
    padding: 0 0 28px 0;
  }
  @media (max-width: 640px) {
    .faq-section { padding: 80px 24px; }
    .faq-item summary { font-size: 15.5px; padding: 24px 36px 24px 0; }
  }

  /* ============ STORY ============ */
  .story-section { padding: 100px 32px; background: var(--paper-warm); position: relative; z-index: 2; }
  .story-inner { max-width: 680px; margin: 0 auto; }
  .story-inner .h2 { text-align: center; margin-bottom: 56px; }
  .story-body {
    font-family: var(--serif);
    font-size: 16.5px;
    line-height: 2.5;
    color: var(--ink-soft);
  }
  .story-body p { margin-bottom: 28px; }
  .story-body p:last-child { margin-bottom: 0; }
  .story-emphasis {
    font-size: 18.5px !important;
    font-weight: 600;
    color: var(--ink) !important;
    line-height: 2.4 !important;
  }
  .story-emphasis strong { color: var(--asibi-green-deep) !important; font-weight: 700 !important; }
  .story-emphasis-strong {
    font-size: 20px !important;
    line-height: 2.25 !important;
    background: rgba(250, 245, 235, 0.8);
    padding: 28px 32px;
    border-left: 3px solid var(--green-deep);
    margin-bottom: 28px;
    color: var(--ink) !important;
    font-weight: 600;
  }
  .story-emphasis-strong strong { color: var(--asibi-green-deep) !important; font-weight: 700; }
  .story-geidai {
    background: rgba(250, 245, 235, 0.8);
    border-left: 3px solid var(--gold);
    padding: 28px 32px;
    font-size: 17px !important;
    color: var(--ink) !important;
    line-height: 2.35 !important;
  }
  .story-geidai strong { color: var(--gold-ink); font-weight: 700; }
  .story-signature {
    text-align: right;
    font-size: 14px;
    color: var(--ink-mute);
    letter-spacing: 0.08em;
    margin-top: 40px !important;
  }
  @media (max-width: 640px) {
    .story-section { padding: 80px 24px; }
    .story-body { font-size: 15.5px; }
    .story-emphasis-strong, .story-geidai { padding: 22px 24px; font-size: 17.5px !important; }
  }

  /* ============ PRICING ============ */
  .pricing-section { padding: 100px 32px; background: var(--paper); position: relative; z-index: 2; }
  .pricing-header { text-align: center; margin-bottom: 64px; }
  .pricing-intro {
    font-family: var(--serif);
    font-size: 17.5px;
    color: var(--ink-soft);
    line-height: 2.3;
    text-align: center;
    max-width: 600px;
    margin: 8px auto 0;
  }
  .pricing-intro strong { color: var(--asibi-green-deep); font-weight: 600; }
  .pricing-intro-note {
    display: inline-block;
    margin-top: 16px;
    font-size: 14px;
    color: var(--ink-mute);
    letter-spacing: 0.04em;
  }
  .pricing-3col {
    max-width: 1080px;
    margin: 64px auto 32px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
  .price-card {
    background: #FAF5EB;
    border: 1px solid var(--hairline);
    padding: 48px 32px 40px;
    position: relative;
    transition: transform 0.4s cubic-bezier(0.65, 0, 0.35, 1), border-color 0.3s;
    display: flex;
    flex-direction: column;
  }
  .price-card:hover {
    transform: translateY(-4px);
    border-color: var(--asibi-green);
    box-shadow: 0 16px 32px rgba(28, 26, 23, 0.08);
  }
  .price-card.primary {
    background: linear-gradient(172deg, #0A4A32, #053B27);
    border: 1px solid var(--green-deep);
    transform: translateY(-12px);
    box-shadow: 0 24px 48px -24px rgba(5, 59, 39, .55);
  }
  .price-card.primary:hover {
    transform: translateY(-16px);
    box-shadow: 0 20px 48px rgba(5, 59, 39, 0.18);
  }
  .price-card-badge {
    position: absolute;
    top: -14px; left: 50%;
    transform: translateX(-50%);
    background: var(--gold-ink);
    color: #FDFBF5;
    font-family: var(--serif);
    font-size: 12px;
    font-weight: 600;
    padding: 6px 18px;
    letter-spacing: 0.2em;
  }
  .price-card-tag {
    font-family: var(--serif);
    font-size: 11.5px;
    font-weight: 600;
    color: var(--gold-ink);
    letter-spacing: 0.16em;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--hairline);
  }
  .price-card-name {
    font-family: var(--display);
    font-size: 22px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.08em;
    margin-bottom: 16px;
  }
  .price-card-amt {
    font-family: var(--display);
    font-size: 42px;
    font-weight: 700;
    color: var(--ink);
    line-height: 1;
    margin-bottom: 14px;
    letter-spacing: -0.01em;
  }
  .price-card.primary .price-card-amt { font-size: 46px; color: #F6EFDD; }
  .price-card-amt small {
    font-size: 15px;
    font-weight: 500;
    color: var(--ink-mute);
    margin-left: 6px;
  }
  .price-card-desc {
    font-family: var(--serif);
    font-size: 13.5px;
    color: var(--ink-soft);
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--hairline);
    letter-spacing: 0.04em;
  }
  .price-card.primary .price-card-desc { border-bottom-color: rgba(5, 59, 39, 0.2); }
  .price-card-features { list-style: none; margin: 0; padding: 0; flex: 1; }
  .price-card-features li {
    font-family: var(--serif);
    font-size: 14px;
    line-height: 1.8;
    color: var(--ink);
    padding: 10px 0 10px 22px;
    position: relative;
  }
  .price-card-features li::before {
    content: '◯';
    position: absolute;
    left: 0; top: 12px;
    color: var(--asibi-green);
    font-size: 11px;
    font-weight: 700;
  }
  .price-card-features li.negative { color: var(--ink-mute); }
  .price-card-features li.negative::before {
    content: '×';
    color: var(--ink-mute);
    font-size: 14px;
    top: 10px;
  }
  .price-card-features strong { color: var(--asibi-green-deep); font-weight: 700; }
  .pricing-note {
    text-align: center;
    font-family: var(--serif);
    font-size: 12.5px;
    color: var(--ink-mute);
    line-height: 2.2;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 32px;
  }
  @media (max-width: 920px) {
    .pricing-3col { grid-template-columns: 1fr; max-width: 420px; gap: 20px; }
    .price-card.primary { transform: translateY(0); }
    .price-card.primary:hover { transform: translateY(-4px); }
  }
  @media (max-width: 640px) {
    .price-card { padding: 40px 24px 32px; }
    .price-card-amt { font-size: 36px; }
    .price-card.primary .price-card-amt { font-size: 40px; }
  }

  /* ============ FINAL CTA ============ */
  .final {
    padding: 150px 32px 120px; text-align: center;
    background: linear-gradient(180deg, #0A4A32, #04301F);
    position: relative; z-index: 2;
  }
  .final-brand {
    margin-bottom: 36px;
    display: flex; flex-direction: column; align-items: center; gap: 10px;
  }
  .final-brand-main {
    font-family: var(--display);
    font-weight: 700;
    font-size: 40px;
    letter-spacing: 0.3em;
    text-indent: 0.3em;
    color: var(--green-deep);
    line-height: 1;
  }
  .final-brand-sub {
    font-family: var(--serif);
    font-weight: 500;
    font-size: 13px;
    letter-spacing: 0.4em;
    text-indent: 0.4em;
    color: var(--ink-soft);
  }
  .final h2 { font-family: var(--display); font-size: clamp(27px, 4.2vw, 42px); font-weight: 700; line-height: 1.7; margin-bottom: 24px; letter-spacing: 0.05em; }
  .final p { font-family: var(--serif); font-size: 15px; color: var(--ink-soft); margin-bottom: 44px; }
  .final p strong { color: var(--asibi-green-deep); font-weight: 600; }

  .footer { text-align: center; padding: 44px 32px; border-top: 1px solid var(--hairline); font-family: var(--serif); font-size: 12px; color: var(--ink-mute); letter-spacing: 0.12em; background: var(--paper); position: relative; z-index: 2; }
  .footer a { color: var(--ink-soft); text-decoration: none; }
  .footer a:hover { color: var(--asibi-green); }

  .reveal { opacity: 0; transform: translateY(20px); transition: opacity 1s, transform 1s; }
  .reveal.in { opacity: 1; transform: translateY(0); }

  /* ============ floating mobile CTA ============ */
  .mobile-cta-float { display: none; }
  @media (max-width: 880px) {
    .mobile-cta-float {
      display: flex;
      position: fixed;
      bottom: 0; left: 0; right: 0;
      z-index: 100;
      background: rgba(250, 246, 238, 0.96);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      padding: 14px 20px calc(14px + env(safe-area-inset-bottom, 0));
      border-top: 1px solid var(--hairline);
      box-shadow: 0 -8px 32px -8px rgba(20, 18, 14, 0.08);
      align-items: center;
      gap: 14px;
      transform: translateY(100%);
      transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .mobile-cta-float.is-visible { transform: translateY(0); }
    .mobile-cta-float-text {
      flex: 1;
      font-family: var(--serif);
      font-size: 12px;
      color: var(--ink-soft);
      line-height: 1.5;
      letter-spacing: 0.02em;
    }
    .mobile-cta-float-text strong { color: var(--asibi-green-deep); font-weight: 600; }
    .mobile-cta-float .cta-btn { padding: 13px 22px; font-size: 13px; gap: 8px; flex-shrink: 0; }
    .mobile-cta-float .cta-btn svg { width: 16px; height: 16px; }
    body.has-mobile-cta { padding-bottom: 80px; }
  }

  @media (prefers-reduced-motion: reduce) {
    .reveal, .hero-copy, .hero-intro, .hero-cta-bar { animation: none !important; transition: none !important; opacity: 1 !important; transform: none !important; }
    .audio-player-wave span { animation: none !important; }
  }
  /* --- ロゴ画像（添付ロゴに差し替え） --- */
  .logo-group { align-items: center; }
  .logo-img { height: 22px; width: auto; display: block; }
  .final-brand-img { height: 44px; width: auto; display: block; margin: 0 auto; }
  @media (max-width: 600px) { .final-brand-img { height: 36px; } }

  /* ===== 製品ページから移植した意匠 ===== */
  .frame { position: relative; display: block; box-shadow: 0 22px 44px -18px rgba(28, 26, 23, .35); }
  .frame img { display: block; width: 100%; border: 1px solid rgba(168, 133, 63, .65); box-shadow: none; }
  .frame::after { content: ''; position: absolute; inset: -9px; border: 1px solid rgba(201, 176, 131, .5); pointer-events: none; }
  .audio-card::before { content: ''; position: absolute; left: 0; right: 0; top: 0; height: 1px; background: var(--gold); }
  @media (min-width: 721px) {
    .audio-card-image-caption { position: absolute; right: -2.6rem; top: 0; writing-mode: vertical-rl; text-align: left; margin-top: 0; letter-spacing: .2em; line-height: 1.9; }
  }
  .price-card.primary .price-card-name,
  .price-card.primary .price-card-features li { color: var(--cream-on-green); }
  .price-card.primary .price-card-desc { color: rgba(243, 236, 221, .8); border-bottom-color: rgba(228, 201, 136, .3); }
  .price-card.primary .price-card-tag { color: var(--gold-soft); border-bottom-color: rgba(228, 201, 136, .3); }
  .price-card.primary .price-card-features li::before { color: var(--gold-soft); }
  .price-card.primary .price-card-features strong { color: var(--gold-soft); }
  .price-card.primary .price-card-amt small { color: rgba(243, 236, 221, .7); }
  .final h2 { color: #FDFBF5; }
  .final h2 em { color: var(--gold-soft); }
  .final p { color: rgba(243, 236, 221, .85); }
  .final p strong { color: var(--gold-soft); }
  .final-brand-main { color: var(--paper); }
  .final-brand-sub { color: rgba(243, 236, 221, .65); }
  .hiraku-lede { font-family: var(--serif); font-size: 17px; line-height: 2.3; color: var(--ink-soft); margin-top: 22px; }
  .stages { display: grid; grid-template-columns: 1fr 1fr; background: #FAF5EB; border: 1px solid var(--hairline); }
  .stage { position: relative; overflow: hidden; padding: clamp(40px, 5vw, 62px) clamp(28px, 4vw, 54px); }
  .stage + .stage { border-left: 1px solid var(--hairline); }
  .stage-no { position: absolute; right: 2px; top: -26px; font-family: var(--display); font-weight: 800; font-size: clamp(96px, 12vw, 150px); line-height: 1; color: rgba(200, 164, 85, .16); pointer-events: none; user-select: none; }
  .stage-tick { width: 26px; height: 1px; background: var(--gold); margin-bottom: 18px; }
  .stage-name { font-family: var(--display); font-weight: 700; font-size: clamp(23px, 2.6vw, 32px); letter-spacing: .05em; color: var(--ink); position: relative; }
  @media (max-width: 880px) { .stages { grid-template-columns: 1fr; } .stage + .stage { border-left: none; border-top: 1px solid var(--hairline); } }