:root {
  --paper: #f4f1e8;
  --ink: #161714;
  --muted: #66685f;
  --line: #d7d2c5;
  --card: #fbfaf6;
  --acid: #d8ff47;
  --blue: #2e48ff;
  --dark: #1c1e1a;
  --green: #347431;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--paper); }
button, input, select { font: inherit; }
button, summary, input[type="range"], input[type="radio"], input[type="checkbox"] { cursor: pointer; }
a { color: inherit; }
[hidden] { display: none !important; }

.site-header, footer { width: min(1180px, calc(100% - 40px)); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.site-header { height: 82px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 15px; font-weight: 800; text-decoration: none; letter-spacing: -.02em; }
.brand-mark { width: 28px; height: 28px; display: block; flex: 0 0 auto; }
nav { display: flex; gap: 30px; }
nav a { color: #43453e; font-size: 13px; text-decoration: none; }
nav a:hover { color: var(--blue); }

main { overflow: hidden; }
.hero { width: min(1220px, calc(100% - 40px)); margin: 82px auto 48px; text-align: center; }
.eyebrow, .kicker, .step-label { font-size: 12.5px; text-transform: uppercase; letter-spacing: .11em; font-weight: 800; }
.eyebrow { display: inline-flex; gap: 8px; align-items: center; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #54b74f; box-shadow: 0 0 0 4px #d9e9d5; }
h1 { margin: 25px auto 24px; font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", Georgia, serif; font-size: clamp(49px, 6.3vw, 82px); line-height: 1.08; letter-spacing: -.035em; font-weight: 500; text-wrap: balance; }
h1 em { color: var(--blue); font-weight: 500; }
.hero-copy { max-width: 760px; margin: 0 auto; color: var(--muted); font-size: 17px; line-height: 1.85; }
.benefit-row { margin: 24px auto 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.benefit-row span { padding: 7px 11px; border: 1px solid var(--line); border-radius: 100px; background: rgba(255,255,255,.28); font-size: 10px; font-weight: 750; }
.privacy-note { display: inline-flex; gap: 8px; align-items: center; margin-top: 17px; color: #46483f; font-size: 12px; }
.privacy-note svg { width: 17px; fill: #497d45; }

.cutter { width: min(920px, calc(100% - 32px)); margin: 52px auto 96px; padding: 34px; background: var(--card); border: 1px solid #cfcabd; border-radius: 30px; box-shadow: 0 24px 70px rgba(37,34,25,.1); }
.tool-heading { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 26px; }
.tool-heading h2 { margin: 6px 0 0; font-size: 26px; letter-spacing: -.04em; }
.step-label, .kicker { color: var(--blue); }
.engine-tag { padding: 7px 11px; border: 1px solid var(--line); border-radius: 100px; color: var(--muted); font-size: 10px; }
.drop-zone { min-height: 265px; padding: 32px; border: 1.5px dashed #a8aa9f; border-radius: 20px; display: flex; flex-direction: column; align-items: center; justify-content: center; background: #f8f6ef; cursor: pointer; transition: .2s ease; }
.drop-zone:hover, .drop-zone.dragover { border-color: var(--blue); background: #f1f2ff; transform: translateY(-2px); }
.upload-icon { width: 54px; height: 54px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 50%; background: var(--acid); }
.upload-icon svg { width: 24px; fill: none; stroke: var(--ink); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.drop-zone strong { font-size: 20px; letter-spacing: -.025em; }
.drop-zone > span:not(.upload-icon) { margin-top: 4px; color: var(--muted); }
.drop-zone small { margin-top: 18px; color: #898b82; }
.file-card { display: flex; gap: 14px; align-items: center; padding: 14px; border-radius: 17px; background: #eeece4; }
.file-thumb { width: 54px; height: 54px; border-radius: 11px; display: grid; place-items: center; background: var(--dark); color: var(--acid); font-size: 10px; font-weight: 900; letter-spacing: .1em; }
.file-details { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.file-details strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-details span { color: var(--muted); font-size: 12px; }
.icon-button { width: 34px; height: 34px; border: 0; border-radius: 50%; background: transparent; color: #666; font-size: 24px; }
.icon-button:hover { background: #ddd9cd; color: #111; }

.wave-editor { margin-top: 22px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: #f6f4ed; }
.editor-label { display: flex; align-items: end; justify-content: space-between; gap: 18px; }
.editor-label h3 { margin: 5px 0 0; font-size: 20px; }
.editor-label output { color: var(--blue); font-size: 12px; font-weight: 800; }
.wave-stage { position: relative; height: 210px; margin-top: 20px; overflow: hidden; border: 1px solid #cbc7bb; border-radius: 14px; background: #fcfbf7; touch-action: none; user-select: none; }
#waveform { width: 100%; height: 100%; display: block; }
.selection { position: absolute; top: 0; bottom: 0; left: 0; width: 100%; border-top: 2px solid var(--blue); border-bottom: 2px solid var(--blue); background: rgba(46,72,255,.11); pointer-events: none; }
.handle { position: absolute; z-index: 4; top: 0; bottom: 0; width: 22px; border: 0; background: transparent; pointer-events: auto; touch-action: none; }
.handle::before { content: ""; position: absolute; top: 0; bottom: 0; left: 9px; width: 3px; background: var(--blue); }
.handle::after { content: ""; position: absolute; top: 9px; left: 3px; width: 16px; height: 22px; border-radius: 5px; background: var(--blue); box-shadow: inset 5px 0 0 -3px rgba(255,255,255,.7), inset -5px 0 0 -3px rgba(255,255,255,.7); }
.start-handle { left: -11px; }
.end-handle { right: -11px; }
.playhead { position: absolute; z-index: 3; top: 0; bottom: 0; width: 1px; left: 0; background: #ef4d31; pointer-events: none; opacity: 0; }
.silence-mark { position: absolute; z-index: 1; top: 0; bottom: 0; background: repeating-linear-gradient(135deg, rgba(216,255,71,.48), rgba(216,255,71,.48) 6px, rgba(216,255,71,.24) 6px, rgba(216,255,71,.24) 12px); pointer-events: none; }
.timeline { display: flex; justify-content: space-between; margin: 6px 3px 0; color: var(--muted); font-size: 10px; }
.transport-row { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.secondary-button, .outline-button, .small-dark-button, .cancel-button { border-radius: 10px; font-weight: 800; }
.secondary-button { padding: 10px 14px; border: 0; background: var(--ink); color: #fff; font-size: 12px; }
.text-button { padding: 7px 4px; border: 0; background: transparent; color: var(--blue); font-size: 11px; font-weight: 750; }
.zoom-control { margin-left: auto; display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 10px; }
.zoom-control input { width: 100px; accent-color: var(--blue); }
.view-control { display: flex; align-items: center; gap: 12px; margin-top: 12px; color: var(--muted); font-size: 10px; }
.view-control input { flex: 1; accent-color: var(--blue); }
#source-audio { width: 100%; height: 38px; margin-top: 16px; }
.time-grid { display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: 12px; margin-top: 14px; }
.time-grid label { color: var(--muted); font-size: 10px; }
.time-grid input { width: 100%; margin-top: 5px; padding: 11px; border: 1px solid #c9c5ba; border-radius: 10px; background: #fffefa; color: var(--ink); outline: none; }
.time-grid > span { padding-bottom: 11px; color: var(--muted); }

.silence-panel { margin-top: 16px; padding: 18px; display: grid; grid-template-columns: 1fr auto auto; gap: 18px; align-items: center; border: 1px solid var(--line); border-radius: 16px; }
.silence-panel strong { font-size: 14px; }
.silence-panel p { margin: 5px 0 0; color: var(--muted); font-size: 11px; line-height: 1.5; }
.silence-panel label { display: flex; flex-direction: column; gap: 5px; color: var(--muted); font-size: 9px; }
select, .filename-field input { border: 1px solid #c9c5ba; border-radius: 10px; background: #fffefa; color: var(--ink); outline: none; }
select:focus, input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(46,72,255,.1); }
.silence-panel select { padding: 9px; }
.outline-button { padding: 11px 14px; border: 1px solid var(--ink); background: transparent; font-size: 11px; }
.silence-result { margin-top: 10px; padding: 14px 18px; display: flex; justify-content: space-between; align-items: center; gap: 16px; border-radius: 13px; background: #edffd1; }
.silence-result p { margin: 0; font-size: 12px; }
.small-dark-button { padding: 9px 12px; border: 0; background: var(--ink); color: #fff; font-size: 10px; }

.settings { margin-top: 22px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.setting-card { margin: 0; padding: 18px; border: 1px solid var(--line); border-radius: 16px; }
.setting-card legend { padding: 0 7px; font-size: 12px; font-weight: 900; }
.choice { display: flex; gap: 10px; padding: 10px 8px; border-radius: 10px; }
.choice:hover { background: #f0eee6; }
.choice input { margin-top: 3px; accent-color: var(--blue); }
.choice span { display: flex; flex-direction: column; gap: 3px; }
.choice strong { font-size: 12px; }
.choice small { color: var(--muted); font-size: 10px; }
.mode-status { grid-column: 1/-1; display: flex; gap: 11px; align-items: flex-start; padding: 15px 17px; border-radius: 14px; background: #ebf6df; border: 1px solid #bdd19e; }
.mode-status.reencode { background: #fff0d2; border-color: #e6c57f; }
.mode-dot { flex: 0 0 auto; width: 9px; height: 9px; margin-top: 4px; border-radius: 50%; background: #4f9a46; }
.reencode .mode-dot { background: #d0841d; }
.mode-status strong { font-size: 12px; }
.mode-status p { margin: 4px 0 0; color: var(--muted); font-size: 10px; line-height: 1.5; }
.advanced { grid-column: 1/-1; padding: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.advanced summary { font-size: 12px; font-weight: 800; }
.advanced summary span { margin-left: 6px; color: var(--muted); font-weight: 500; }
.advanced-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; align-items: end; padding-top: 16px; }
.advanced-grid label { font-size: 10px; color: var(--muted); }
.advanced-grid select { display: block; width: 100%; padding: 10px; margin-top: 6px; }
.check-row { display: flex; align-items: center; gap: 8px; min-height: 40px; }
.check-row input { accent-color: var(--blue); }
.advanced > p { margin: 12px 0 0; color: var(--muted); font-size: 10px; }
.filename-field { grid-column: 1/-1; color: var(--muted); font-size: 10px; }
.filename-field span { display: flex; align-items: center; margin-top: 6px; border: 1px solid #c9c5ba; border-radius: 10px; background: #fffefa; overflow: hidden; }
.filename-field input { flex: 1; min-width: 0; padding: 12px; border: 0; background: transparent; }
.filename-field b { padding-right: 13px; color: var(--muted); font-size: 11px; }
.primary-button { grid-column: 1/-1; min-height: 58px; padding: 0 22px; border: 0; border-radius: 14px; display: flex; justify-content: space-between; align-items: center; background: var(--blue); color: #fff; font-weight: 800; box-shadow: 0 8px 18px rgba(46,72,255,.2); transition: .2s; }
.primary-button:hover { background: #1931da; transform: translateY(-1px); }
.primary-button:disabled { opacity: .55; cursor: wait; }

.progress-panel { margin-top: 24px; padding: 22px; border-radius: 16px; background: var(--dark); color: #fff; }
.progress-top { display: flex; justify-content: space-between; font-size: 13px; }
.progress-track { height: 7px; margin: 14px 0; border-radius: 8px; background: #3d4039; overflow: hidden; }
.progress-track i { display: block; width: 0; height: 100%; background: var(--acid); transition: width .2s; }
.progress-panel p { margin: 0; color: #afb2a8; font-size: 11px; }
.cancel-button { margin-top: 14px; padding: 8px 11px; border: 1px solid #666a62; background: transparent; color: #fff; font-size: 10px; }
.result-card { margin-top: 24px; padding: 20px; display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; border-radius: 18px; background: #ecf6df; border: 1px solid #bdd19e; }
.result-icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; background: var(--acid); font-size: 23px; }
.result-info { min-width: 0; }
.result-info > span { font-size: 9px; letter-spacing: .13em; color: #5c6c47; font-weight: 900; }
.result-info strong { display: block; margin: 4px 0 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.result-info small { display: block; margin-bottom: 7px; color: var(--muted); font-size: 10px; }
audio { width: min(100%, 390px); }
.download-button { padding: 12px 16px; border-radius: 10px; background: var(--ink); color: #fff; text-decoration: none; font-size: 12px; font-weight: 800; white-space: nowrap; }
.error-message { margin-top: 18px; padding: 14px; border-radius: 12px; background: #ffe7e1; color: #8c2c1d; font-size: 13px; }

.proof-strip { width: min(1180px, calc(100% - 40px)); margin: 0 auto 110px; padding: 30px 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.proof-strip div { text-align: center; border-right: 1px solid var(--line); }
.proof-strip div:last-child { border: 0; }
.proof-strip strong { display: block; font-family: Georgia, serif; font-size: 28px; font-weight: 500; }
.proof-strip span { color: var(--muted); font-size: 11px; }
.how-section, .guide-section, .faq-section, .related-section { width: min(1080px, calc(100% - 40px)); margin: 0 auto 130px; }
.section-intro { display: block; }
.section-number { font-family: Georgia, serif; color: var(--blue); font-size: 44px; }
.section-intro h2, .guide-copy h2, .faq-section h2, .related-section h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", Georgia, serif; font-size: clamp(30px, 3.6vw, 46px);
line-height: 1.28;
  letter-spacing: -.01em;
  text-wrap: balance; font-weight: 500; }
.section-lead { max-width: none; margin: 24px 0 0; color: var(--muted); line-height: 1.9; font-size: 14.5px; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 58px; }
.steps-grid article { min-height: 220px; padding: 25px; border: 1px solid var(--line); border-radius: 18px; }
.steps-grid article > span { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--acid); font-size: 12px; font-weight: 900; }
.steps-grid h3 { margin: 48px 0 10px; font-size: 18px; }
.steps-grid p { margin: 0; color: var(--muted); line-height: 1.6; font-size: 13px; }
.guide-section { padding: 64px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; border-radius: 28px; background: var(--dark); color: #fff; }
.guide-copy h2 { font-size: clamp(38px, 4.2vw, 56px); }
.guide-copy > p:last-child { margin-top: 28px; color: #b7b9b1; line-height: 1.8; font-size: 14px; }
.comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-self: center; }
.comparison article { padding: 22px; border: 1px solid #41443e; border-radius: 17px; background: #242722; }
.comparison article.recommended { border-color: #728538; background: #292d23; }
.comparison article > span { color: var(--acid); font-size: 8px; letter-spacing: .15em; font-weight: 900; }
.comparison h3 { margin: 24px 0 10px; }
.comparison p, .comparison li { color: #b7b9b1; font-size: 11px; line-height: 1.65; }
.comparison ul { padding-left: 16px; margin-bottom: 0; }
.content-section { width: min(1080px, calc(100% - 40px)); margin: 0 auto 130px; }
.content-heading { display: block; margin-bottom: 34px; }
.content-heading h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", Georgia, serif; font-size: clamp(36px, 5vw, 62px); line-height: 1.14; letter-spacing: -.02em; font-weight: 500; }
.content-copy { max-width: 780px; margin: 0 0 34px; }
.content-copy p { color: var(--muted); line-height: 1.9; }
.example-grid, .info-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.info-cards { grid-template-columns: repeat(3, 1fr); }
.example-grid article, .info-cards article { min-height: 200px; padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.35); }
.example-grid article > span { color: var(--blue); font-size: 9px; letter-spacing: .13em; font-weight: 900; }
.example-grid h3, .info-cards h3 { margin: 44px 0 10px; font-size: 17px; }
.example-grid p, .info-cards p { margin: 0; color: var(--muted); line-height: 1.75; font-size: 13px; }
.trouble-table { border-top: 1px solid var(--ink); }
.trouble-row { display: grid; grid-template-columns: 1fr 1fr 1.35fr; gap: 18px; padding: 17px 10px; border-bottom: 1px solid var(--line); font-size: 13px; line-height: 1.5; }
.trouble-row span { color: var(--muted); }
.trouble-head { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.test-section { width: min(1080px, calc(100% - 40px)); margin: 0 auto 130px; padding: 60px; display: grid; grid-template-columns: .85fr 1.15fr; gap: 65px; align-items: center; border-radius: 28px; background: #e6ff88; }
.test-copy h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", Georgia, serif; font-size: clamp(26px, 3vw, 38px); line-height: 1.12; font-weight: 500; letter-spacing: -.02em; }
.test-copy > p:last-child { margin: 26px 0 0; color: #535744; line-height: 1.75; font-size: 13px; }
.test-card { padding: 26px; border-radius: 18px; background: var(--card); box-shadow: 0 14px 35px rgba(51,60,24,.1); }
.tested-badge { display: inline-block; padding: 6px 9px; border-radius: 100px; background: var(--ink); color: #fff; font-size: 9px; letter-spacing: .08em; }
.test-card dl { margin: 18px 0 0; }
.test-card dl div { display: grid; grid-template-columns: 1fr 1.2fr; gap: 15px; padding: 12px 2px; border-bottom: 1px solid var(--line); font-size: 12px; }
.test-card dt { color: var(--muted); }
.test-card dd { margin: 0; font-weight: 750; }
.test-card .success { color: var(--green); }
.faq-section { max-width: 820px; }
.faq-section > h2 { margin-bottom: 50px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { list-style: none; padding: 23px 0; display: flex; justify-content: space-between; font-weight: 750; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: var(--blue); font-size: 22px; font-weight: 400; transition: transform .2s; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list p { max-width: 680px; margin: -5px 0 24px; color: var(--muted); line-height: 1.65; font-size: 14px; }
.related-section { padding-top: 4px; }
.related-section > h2 { max-width: 720px; }
.related-grid { margin-top: 42px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.related-grid article { min-height: 250px; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: var(--card); }
.related-icon { display: grid; place-items: center; width: 46px; height: 46px; color: var(--acid); background: var(--ink); border-radius: 50%; font-size: 9px; font-weight: 900; letter-spacing: .08em; }
.related-grid h3 { margin: 30px 0 10px; font-size: 20px; }
.related-grid p { margin: 0; color: var(--muted); line-height: 1.65; font-size: 13px; }
.tool-path { display: inline-block; max-width: 100%; margin-top: 18px; padding: 6px 9px; overflow-wrap: anywhere; color: var(--blue); background: #edf0ff; border-radius: 7px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; }
footer { min-height: 120px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
footer .brand { color: var(--ink); }

@media (max-width: 760px) {
  .site-header { height: 68px; }
  nav { display: none; }
  .hero { margin-top: 58px; }
  h1 { font-size: clamp(31px, 9vw, 50px); }
  .hero-copy { font-size: 15px; }
  .cutter { padding: 19px; border-radius: 22px; margin-top: 38px; }
  .engine-tag { display: none; }
  .drop-zone { min-height: 230px; padding: 20px; text-align: center; }
  .wave-editor { padding: 14px; }
  .editor-label { align-items: flex-start; flex-direction: column; gap: 8px; }
  .wave-stage { height: 175px; }
  .transport-row { flex-wrap: wrap; }
  .zoom-control { width: 100%; margin-left: 0; }
  .zoom-control input { flex: 1; }
  .silence-panel { grid-template-columns: 1fr; }
  .silence-result { align-items: flex-start; flex-direction: column; }
  .settings { grid-template-columns: 1fr; }
  .mode-status, .advanced, .filename-field, .primary-button { grid-column: auto; }
  .advanced-grid { grid-template-columns: 1fr; }
  .result-card { grid-template-columns: auto 1fr; }
  .download-button { grid-column: 1/-1; text-align: center; }
  .proof-strip { grid-template-columns: 1fr 1fr; gap: 22px 0; }
  .proof-strip div:nth-child(2) { border: 0; }
  .section-intro { display: block; }
  .section-number { font-size: 28px; }
  .section-lead { max-width: none; margin: 24px 0 0; color: var(--muted); line-height: 1.9; font-size: 14.5px; }
  .steps-grid, .guide-section, .content-heading, .example-grid, .info-cards, .test-section, .related-grid { grid-template-columns: 1fr; }
  .guide-section { padding: 35px 20px; gap: 44px; }
  .comparison { grid-template-columns: 1fr; }
  .content-heading { display: block; margin-bottom: 34px; }
  .example-grid article, .info-cards article { min-height: auto; }
  .example-grid h3, .info-cards h3 { margin-top: 22px; }
  .trouble-table { overflow-x: auto; }
  .trouble-row { min-width: 650px; }
  .test-section { padding: 36px 22px; gap: 38px; }
  .related-section { width: calc(100% - 28px); margin-bottom: 88px; }
  .related-section h2 { font-size: 38px; }
  footer { padding: 28px 0; gap: 20px; flex-wrap: wrap; }
  footer p { order: 3; width: 100%; margin: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

/* ===== 関連ツール（内部リンク） ===== */
.related-section { width: min(1080px, calc(100% - 40px)); margin: 0 auto 110px; }
.related-kicker { margin: 0 0 14px; color: var(--blue); font-size: 12.5px; font-weight: 800; letter-spacing: .11em; }
.related-section h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", Georgia, serif; font-size: clamp(28px, 3.4vw, 42px); font-weight: 500; line-height: 1.3; letter-spacing: -.01em; text-wrap: balance; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr)); gap: 16px; margin-top: 40px; }
.related-card { display: flex; flex-direction: column; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: var(--card); color: inherit; text-decoration: none; transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease; }
.related-card:hover, .related-card:focus-visible { transform: translateY(-2px); border-color: var(--ink); box-shadow: 0 12px 30px rgba(22, 23, 20, .08); }
.related-icon { display: grid; place-items: center; width: 46px; height: 46px; color: var(--acid); background: var(--ink); border-radius: 50%; font-size: 9px; font-weight: 900; letter-spacing: .08em; }
.related-card h3 { margin: 26px 0 10px; font-size: 19px; line-height: 1.45; }
.related-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }
.related-cta { margin-top: auto; padding-top: 20px; color: var(--blue); font-size: 12.5px; font-weight: 800; }
@media (max-width: 640px) { .related-section { margin-bottom: 80px; } .related-card { padding: 22px; } }

/* 页脚：隐私政策 + 许可入口（2026-10-24） */
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.footer-links a { color: var(--muted); font-size: 12px; text-decoration: underline; text-underline-offset: 3px; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--ink); }

/* 实测证据下载链接（2026-10-24） */
.evidence-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 16px 0 0; }
.evidence-links a { font-size: 13px; color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.evidence-links a:hover, .evidence-links a:focus-visible { text-decoration-thickness: 2px; }

/* ===========================================================
   统一排版（2026-10-24）
   四页共用同一套字体栈与字号阶梯，调整时四份文件保持一致
   =========================================================== */
:root {
  --font-sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
               "Yu Gothic", "YuGothic", Meiryo, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Yu Mincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro",
                "Noto Serif JP", Georgia, serif;
  --fs-h1: clamp(30px, 6.4vw, 74px);
  --fs-h2: clamp(26px, 3.1vw, 40px);
  --fs-h2-ui: 24px;
  --fs-h3: clamp(17px, 1.35vw, 19px);
  --fs-lead: 17px;
}
body { font-family: var(--font-sans); }
h1, .hero h1 {
  font-family: var(--font-serif);
  font-size: var(--fs-h1);
  line-height: 1.12;
  letter-spacing: -.02em;
  font-weight: 500;
}
.section-intro h2, .guide-copy h2, .content-heading h2, .test-copy h2, .faq-section > h2, .related-section h2, .related-section > h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  line-height: 1.3;
  letter-spacing: -.01em;
  font-weight: 500;
}
.tool-heading h2 { font-size: var(--fs-h2-ui); line-height: 1.4; letter-spacing: -.02em; }
.editor-label h3, .steps-grid h3, .example-grid h3, .info-cards h3, .related-grid h3, .related-card h3, .comparison h3 { font-size: var(--fs-h3); line-height: 1.5; }
.hero-copy, .section-lead { font-size: var(--fs-lead); line-height: 1.8; }
@media (max-width: 640px) {
  .tool-heading h2 { font-size: 21px; }
  .hero-copy { font-size: 15px; line-height: 1.85; }
}