/* ============================================================
   すてぶるペイ LP — ユーティリタリアン
   原則: モノクロ＋リンク青のみ / 影・角丸・装飾背景なし /
        1px罫線と余白で構成 / 太字は階層にだけ使う
   制約: 依存ゼロ / ビルド無し / 厳格CSP・Trusted Types 維持
   ============================================================ */

@font-face {
  font-family: "Schibsted Grotesk";
  src: url("fonts/schibsted-grotesk-latin-wght.woff2") format("woff2-variations");
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2013-2014, U+2018-201A,
    U+201C-201E, U+2026, U+2212;
}

:root {
  --ink: #161616;
  --gray: #6b6b6b;
  --gray-light: #9a9a9a;
  --line: #e2e2e2;
  --line-strong: #161616;
  --paper: #ffffff;
  --paper-dim: #f7f7f6;
  --link: #2775ca;
  --accent: #2775ca;
  --accent-dark: #1f5fa8;
  --shell: 1080px;
  --measure: 41em; /* 本文ブロックの共通行長（約635px） */
  --gutter: 28px;  /* グリッド列間の共通ガター */
  --font: "Schibsted Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.9;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "tnum" 1;
  line-break: strict;
}

/* 日本語の文節単位改行（Chromium系のみ。非対応環境は従来挙動にフォールバック） */
h1,
h2,
h3,
p,
li,
th,
td,
summary,
small,
label {
  word-break: auto-phrase;
}

/* 見出しは行長を揃え、段落は孤立行を避ける（対応環境のみ） */
h1,
h2,
h3 {
  text-wrap: balance;
}

p,
li {
  text-wrap: pretty;
}

/* 金額・出典・注記番号など、途中で切ってはいけない語句 */
.nobr {
  white-space: nowrap;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.shell {
  width: min(100% - 48px, var(--shell));
  margin: 0 auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 20;
  padding: 6px 12px;
  background: var(--ink);
  color: #fff;
}

.skip-link:focus {
  top: 8px;
}

.anchor-alias {
  display: block;
  height: 0;
}

/* ---------- 共通パーツ ---------- */

.text-link {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-link:hover {
  text-decoration-thickness: 2px;
}

sup.fn {
  font-size: 10px;
  line-height: 0;
}

sup.fn a {
  color: var(--gray);
  padding: 2px;
}

sup.fn a:hover {
  color: var(--link);
}

.assumed {
  margin-left: 4px;
  color: var(--gray);
  font-size: 11px;
  font-weight: 400;
  white-space: nowrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border: 1px solid var(--ink);
  font-weight: 600;
  line-height: 1.2;
  transition: background 120ms ease, color 120ms ease;
}

.button-primary {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.button-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.button-secondary {
  color: var(--ink);
  background: #fff;
}

.button-secondary:hover {
  background: var(--paper-dim);
}

/* ---------- ヘッダー ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.header-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  width: 136px;
  height: auto;
}

.site-nav {
  display: flex;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray);
}

.site-nav a:hover {
  color: var(--ink);
}

.header-cta {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 16px;
  border: 1px solid var(--ink);
  font-size: 13.5px;
  font-weight: 600;
  transition: background 120ms ease, color 120ms ease;
}

.header-cta:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- ヒーロー（ロゴ主役 × ジェネレーティブアート） ---------- */

.hero {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  min-height: max(640px, calc(100vh - 64px));
  padding: 64px 0 120px;
  background: linear-gradient(180deg, #060d24 0%, #0a1a40 55%, #10306b 100%);
}

#hero-art {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
}

.hero.art-fallback #hero-art {
  display: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.logo-wrap {
  position: relative;
  display: inline-block;
  margin: 0 auto 38px;
  max-width: 100%;
}

.hero-logo {
  width: min(860px, 94vw);
  height: auto;
  margin: 0 auto;
  filter: invert(1) hue-rotate(180deg) brightness(1.12) drop-shadow(0 0 28px rgba(99, 217, 255, 0.22));
}


.hero h1 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.38;
  letter-spacing: 0.01em;
  background: linear-gradient(96deg, #ffffff 40%, #a8d4ff 90%);
  -webkit-background-clip: text;
  background-clip: text;
}

@supports (-webkit-background-clip: text) {
  .hero h1 {
    -webkit-text-fill-color: transparent;
  }
}

.hero-sub {
  margin: 16px 0 0;
  color: #b9cbe8;
  font-size: clamp(15px, 2vw, 18px);
}

.hero-points {
  display: flex;
  max-width: 790px;
  margin: 34px auto 0;
  padding: 0;
  list-style: none;
  text-align: left;
  color: #ffffff;
  background: rgba(6, 13, 36, 0.55);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.hero-points li {
  flex: 1 1 0;
  padding: 16px 18px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.65;
}

.hero-points li + li {
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.point-label {
  display: block;
  margin-bottom: 2px;
  color: #7db4ff;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.hero-points small {
  display: block;
  color: #9fb3d4;
  font-size: 11px;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

.hero .button-secondary {
  color: #ffffff;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.7);
}

.hero .button-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
}

.hero-note {
  max-width: 46em;
  margin: 18px auto 0;
  padding: 8px 16px;
  color: #b9cbe8;
  background: rgba(6, 13, 36, 0.5);
  backdrop-filter: blur(6px);
  font-size: 12.5px;
  line-height: 1.8;
}

.hero-note sup.fn a {
  color: #9fb3d4;
}

/* ---------- ヒーロー登場（シンプルなワンフェード） ---------- */

.hero.hero-anim .hero-inner {
  opacity: 0;
  transform: translateY(12px);
}

.hero.hero-in .hero-inner {
  opacity: 1;
  transform: none;
  transition: opacity 620ms ease 60ms, transform 620ms cubic-bezier(0.22, 0.61, 0.36, 1) 60ms;
}

/* ---------- ティッカーバンド ---------- */

.hero-ticker {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(4, 10, 28, 0.62);
  backdrop-filter: blur(6px);
}

.ticker-track {
  display: inline-flex;
  white-space: nowrap;
  animation: ticker-scroll 32s linear infinite;
}

.ticker-group {
  display: inline-flex;
  padding: 9px 0;
}

.ticker-group span {
  display: inline-flex;
  align-items: center;
  color: #cfe0f5;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.ticker-group span::after {
  content: "◆";
  margin: 0 22px;
  color: #63d9ff;
  font-size: 8px;
}

@keyframes ticker-scroll {
  to {
    transform: translateX(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .ticker-track {
    animation: none;
  }

  .hero.hero-anim .hero-inner {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- 事実（統計） ---------- */

.stats {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-dim);
}

.stats-lead {
  margin: 0;
  padding: 30px 0 6px;
  max-width: var(--measure);
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--gray);
}

.stats-lead strong {
  color: var(--ink);
  font-weight: 700;
}

.stats-lead-src {
  color: var(--gray-light);
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.stats-lead-src:hover {
  color: var(--link);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat {
  padding: 32px 28px 32px 0;
}

.stat + .stat {
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.stat strong {
  display: block;
  font-size: clamp(26px, 2.4vw + 12px, 34px);
  font-weight: 700;
  line-height: 1.1;
}

.stat .unit {
  font-size: 0.5em;
  font-weight: 600;
  margin-left: 2px;
}

.stat p {
  margin: 10px 0 0;
  color: var(--gray);
  font-size: 13px;
  line-height: 1.75;
}

.stat small {
  display: block;
  margin-top: 8px;
  font-size: 11.5px;
  color: var(--gray-light);
}

.stat small a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.stat small a:hover {
  color: var(--link);
}

/* ---------- セクション共通 ---------- */

.section {
  padding: 88px 0;
  border-top: 1px solid var(--line);
}

.section:first-of-type {
  border-top: none;
}

.section h2 {
  margin: 0 0 16px;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.005em;
}

/* セクション番号はキッカーとして見出しの上に置く（フロー番号との階層差を明確に） */
.sec-no {
  display: block;
  margin: 0 0 12px;
  color: var(--gray);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
}

.sec-lead {
  max-width: var(--measure);
  margin: 0 0 44px;
  color: var(--gray);
  font-size: 15px;
}

/* グリッドやテーブルの後に付く補足段落 */
.note {
  max-width: var(--measure);
  margin: 28px 0 0;
  color: var(--gray);
  font-size: 13.5px;
  line-height: 1.85;
}

/* ---------- 仕組み ---------- */

.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
  border-top: 1px solid var(--line-strong);
}

.flow li {
  counter-increment: flow;
  padding: 18px var(--gutter) 18px 0;
}

.flow li + li {
  padding-left: var(--gutter);
  border-left: 1px solid var(--line);
}

.flow li::before {
  content: counter(flow, decimal-leading-zero);
  display: block;
  color: var(--gray-light);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.flow strong {
  display: block;
  margin-top: 4px;
  font-size: 16px;
  font-weight: 700;
}

.flow p {
  margin: 6px 0 0;
  color: var(--gray);
  font-size: 13px;
  line-height: 1.75;
}

.flow-note {
  max-width: var(--measure);
  margin: 28px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--ink);
}

/* ---------- 手数料表 ---------- */

.table-wrap {
  overflow-x: auto;
}

.rate-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
}

.rate-table thead th {
  padding: 10px 16px 10px 0;
  color: var(--gray);
  border-bottom: 1px solid var(--line-strong);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-align: left;
}

.rate-table tbody th,
.rate-table tbody td {
  padding: 14px 16px 14px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-weight: 400;
  line-height: 1.7;
}

.rate-table tbody th {
  width: 30%;
  color: var(--ink);
}

.rate-table tbody td {
  color: var(--gray);
}

.rate-table td a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.rate-table td a:hover {
  color: var(--link);
}

.rate-table .num {
  width: 22%;
  white-space: nowrap;
  font-weight: 600;
  color: var(--ink);
}

.rate-table tr.self th,
.rate-table tr.self td {
  border-bottom: 1px solid var(--line-strong);
  font-weight: 700;
  color: var(--ink);
}

.rate-table tr.self th {
  border-left: 3px solid var(--accent);
  padding-left: 13px;
}

.rate-table tr.self .num {
  font-size: 16px;
}

/* 「従来の決済との違い」表：すてぶるペイ列を強調 */
.compare-table .col-self {
  border-left: 3px solid var(--accent);
  padding-left: 13px;
  color: var(--ink);
  font-weight: 700;
}

.compare-table thead .col-self {
  color: var(--ink);
}

/* 項目列は短い語ばかりなので詰める（間延び防止） */
.compare-table tbody th {
  width: 15%;
  white-space: nowrap;
}

/* ---------- 試算 ---------- */

.roi-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
}

.roi-panel {
  border: 1px solid var(--line);
  padding: 28px;
}

.roi-field + .roi-field {
  margin-top: 18px;
}

.roi-field label {
  display: block;
  margin-bottom: 6px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gray);
}

.roi-control {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: #fff;
  font-family: var(--font);
  font-size: 15px;
  color: var(--ink);
}

.roi-control:focus {
  outline: none;
  border-color: var(--ink);
}

.roi-results {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.roi-results > div {
  padding: 14px 20px 14px 0;
}

.roi-results > div + div {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.roi-results p {
  margin: 0;
  color: var(--gray);
  font-size: 12px;
}

.roi-results strong {
  display: block;
  margin-top: 2px;
  font-size: 24px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.roi-disclaimer {
  display: block;
  margin-top: 18px;
  color: var(--gray-light);
  font-size: 11.5px;
  line-height: 1.75;
}

/* ---------- 対象 ---------- */

.audience {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.audience li {
  display: flex;
  flex-direction: column;
  padding: 20px 28px 20px 0;
}

.audience li + li {
  padding-left: 28px;
  border-left: 1px solid var(--line);
}

.audience h3 {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.6;
}

.audience p {
  margin: 10px 0 16px;
  color: var(--gray);
  font-size: 13.5px;
  line-height: 1.8;
}

.audience .text-link {
  margin-top: auto;
  font-size: 13.5px;
  font-weight: 600;
}

/* ---------- 加盟店の価値カード ---------- */

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.value-grid li {
  display: flex;
  flex-direction: column;
  padding: 20px var(--gutter) 20px 0;
}

.value-grid li + li {
  padding-left: var(--gutter);
  border-left: 1px solid var(--line);
}

.value-grid h3 {
  margin: 0;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
}

.value-grid p {
  margin: 10px 0 0;
  color: var(--gray);
  font-size: 13px;
  line-height: 1.8;
}

/* 「こんな加盟店に」— 価値カードと差別化した軽い一文（罫線で区切る） */
.audience-note {
  max-width: var(--measure);
  margin: 32px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--gray);
  font-size: 13.5px;
  line-height: 1.9;
}

.audience-note .text-link {
  margin-left: 6px;
  font-weight: 600;
  white-space: nowrap;
}

/* ---------- 導入 ---------- */

.prompt-details {
  max-width: 720px;
  border: 1px solid var(--line);
}

.prompt-details summary {
  padding: 14px 18px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

.prompt-details summary:hover {
  background: var(--paper-dim);
}

.prompt-details[open] summary {
  border-bottom: 1px solid var(--line);
}

.prompt-code {
  margin: 0;
  padding: 18px;
  overflow: auto;
  max-height: 420px;
  background: var(--paper-dim);
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12.5px;
  line-height: 1.85;
  white-space: pre-wrap;
}

.copy-button {
  margin: 14px 18px;
}

.copy-state {
  min-height: 20px;
  margin: 0 18px 14px;
  color: var(--gray);
  font-size: 12.5px;
}

/* ---------- FAQ ---------- */

.faq-list {
  max-width: 760px;
  border-top: 1px solid var(--line-strong);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  padding: 16px 0;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.7;
}

.faq-list summary:hover {
  color: var(--link);
}

.faq-list p {
  margin: 0;
  padding: 0 0 18px;
  color: var(--gray);
  font-size: 14px;
}

/* ---------- 先行案内 ---------- */

.early-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
}

.early-mail {
  margin: 16px 0 0;
  font-size: 13.5px;
  color: var(--gray);
}

.early-form {
  display: grid;
  gap: 16px;
  padding: 28px;
  border: 1px solid var(--ink);
}

.early-form .field {
  display: grid;
  gap: 6px;
}

/* honeypot（ボット対策の罠フィールド）: 視覚・支援技術の両方から隠す */
.field-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.early-form .field > span {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gray);
}

.early-form input,
.early-form select,
.early-form textarea {
  width: 100%;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: #fff;
  font-family: var(--font);
  font-size: 15px;
  color: var(--ink);
}

.early-form textarea {
  min-height: 160px;
  padding: 10px 12px;
  line-height: 1.7;
  resize: vertical;
}

.early-form input:focus,
.early-form select:focus,
.early-form textarea:focus {
  outline: none;
  border-color: var(--ink);
}

.early-form .button:disabled {
  opacity: 0.55;
  cursor: progress;
}

.early-consent {
  margin: 0;
  color: var(--gray-light);
  font-size: 11.5px;
  line-height: 1.75;
}

.early-state {
  margin: 0;
  min-height: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

/* ---------- 注記 ---------- */

.footnotes {
  padding: 40px 0 52px;
  border-top: 1px solid var(--line);
  background: var(--paper-dim);
}

.footnotes h2 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.footnote-list {
  max-width: 780px;
  margin: 0;
  padding-left: 1.3em;
  color: var(--gray);
  font-size: 12px;
  line-height: 1.9;
}

.footnote-list li {
  padding: 2px 0;
}

.footnote-list li:target {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- フッター ---------- */

.site-footer {
  padding: 40px 0 48px;
  border-top: 1px solid var(--line-strong);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
}

.footer-logo {
  width: 120px;
}

.footer-inner p {
  margin: 10px 0 0;
  color: var(--gray);
  font-size: 12.5px;
}

.footer-inner a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-inner a:hover {
  color: var(--link);
}

.footer-note {
  color: var(--gray-light);
  white-space: nowrap;
}

/* ---------- インタラクション ----------
   原則: 目的のある動きのみ（状態変化・注目指示・待機表示）。
   入場 = ease-out系 480ms / 操作反応 = 100〜180ms / スタッガー = 60ms刻み。
   JSなし環境では .reveal が付与されないため常時表示。 */

/* スクロールリビール（フェードアップ。JSが .reveal / .reveal-in を制御） */
.reveal {
  opacity: 0;
  transform: translateY(14px);
}

.reveal.reveal-in {
  opacity: 1;
  transform: none;
  transition:
    opacity 480ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 480ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* ホバー反応（クリック可能な要素のみ） */
.site-nav a,
.text-link,
.faq-list summary {
  transition: color 150ms ease;
}

.rate-table tbody tr {
  transition: background-color 150ms ease;
}

.rate-table tbody tr:hover {
  background-color: var(--paper-dim);
}

/* ボタンのプレス感（沈む動き。タッチは短め） */
.button,
.header-cta {
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease,
    transform 100ms ease;
}

.button:active,
.header-cta:active {
  transform: translateY(1px);
}

/* 入力フォーカスリング（にじみ出るリング） */
.roi-control,
.early-form input,
.early-form select,
.early-form textarea {
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.roi-control:focus,
.early-form input:focus,
.early-form select:focus,
.early-form textarea:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(39, 117, 202, 0.18);
}

/* FAQアコーディオン（シェブロン回転＋本文フェードアップ） */
.faq-list summary {
  position: relative;
  padding-right: 28px;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-70%) rotate(45deg);
  transition: transform 200ms cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-list details[open] summary::after {
  transform: translateY(-30%) rotate(225deg);
}

.faq-list details[open] p {
  animation: faq-open 240ms cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
}

/* 高さのアニメーション（対応ブラウザのみの漸進的強化） */
@supports (interpolate-size: allow-keywords) {
  :root {
    interpolate-size: allow-keywords;
  }

  .faq-list details::details-content {
    block-size: 0;
    overflow: clip;
    transition:
      block-size 240ms cubic-bezier(0.22, 1, 0.36, 1),
      content-visibility 240ms allow-discrete;
  }

  .faq-list details[open]::details-content {
    block-size: auto;
  }
}

/* 手数料表: 横スクロール可能であることの示唆
   （両端のスクロールシャドウ＋ヒントラベル） */
.table-wrap {
  background-image:
    linear-gradient(to right, var(--paper) 40%, rgba(255, 255, 255, 0)),
    linear-gradient(to left, var(--paper) 40%, rgba(255, 255, 255, 0)),
    linear-gradient(to right, rgba(22, 22, 22, 0.12), rgba(22, 22, 22, 0)),
    linear-gradient(to left, rgba(22, 22, 22, 0.12), rgba(22, 22, 22, 0));
  background-position: left center, right center, left center, right center;
  background-size: 32px 100%, 32px 100%, 12px 100%, 12px 100%;
  background-repeat: no-repeat;
  background-attachment: local, local, scroll, scroll;
}

.table-scroll-hint {
  display: none;
  margin: 0 0 10px;
  color: var(--gray-light);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.table-scroll-hint.is-visible {
  display: block;
}

.table-scroll-hint .arrow {
  display: inline-block;
  margin-left: 4px;
  animation: hint-nudge 1.4s cubic-bezier(0.22, 1, 0.36, 1) 2;
}

@keyframes hint-nudge {
  0%,
  100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .faq-list summary::after,
  .table-scroll-hint .arrow {
    transition: none;
    animation: none;
  }

  .faq-list details[open] p {
    animation: none;
  }
}

/* ---------- レスポンシブ ---------- */

@media (max-width: 900px) {
  .site-nav {
    display: none;
  }

  .hero {
    padding: 56px 0 60px;
  }

  .roi-grid,
  .early-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  /* 統計は3列を維持し、詰まる分は数字級数（clamp）と余白で調整 */
  .stat {
    padding: 26px 20px 26px 0;
  }

  .stat + .stat {
    padding-left: 20px;
  }

  /* 仕組み・導入の4ステップは2×2グリッドに（1列の間延びを防ぐ） */
  .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow li {
    padding: 16px var(--gutter) 16px 0;
  }

  .flow li + li {
    padding-left: 0;
    border-left: none;
  }

  .flow li:nth-child(even) {
    padding-left: var(--gutter);
    border-left: 1px solid var(--line);
  }

  .flow li:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  /* 価値の4カードも2×2に */
  .value-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .value-grid li {
    padding: 16px var(--gutter) 16px 0;
  }

  .value-grid li + li {
    padding-left: 0;
    border-left: none;
  }

  .value-grid li:nth-child(even) {
    padding-left: var(--gutter);
    border-left: 1px solid var(--line);
  }

  .value-grid li:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .audience {
    grid-template-columns: 1fr;
  }

  .audience li {
    padding: 16px 0;
  }

  .audience li + li {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 600px) {
  .shell {
    width: min(100% - 32px, var(--shell));
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    min-height: 58px;
  }

  .brand-logo {
    width: 118px;
  }

  .header-cta {
    font-size: 12.5px;
    padding: 0 12px;
  }

  .hero h1 {
    font-size: 26px;
  }

  .hero {
    min-height: max(560px, calc(100svh - 58px));
    padding: 56px 0 108px;
  }

  .logo-wrap {
    margin-bottom: 32px;
  }

  .hero-logo {
    width: 88vw;
  }

  .hero-points {
    flex-direction: column;
  }

  .hero-points li {
    padding: 12px 18px;
  }

  .hero-points li + li {
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
    min-height: 48px;
  }

  .section {
    padding: 60px 0;
  }

  .section h2 {
    font-size: 22px;
  }

  .sec-no {
    margin-bottom: 8px;
  }

  /* 600px以下は統計・ステップとも1列に */
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat {
    padding: 22px 0;
  }

  .stat + .stat {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--line);
  }

  .flow {
    grid-template-columns: 1fr;
  }

  .flow li {
    padding: 16px 0;
  }

  .flow li:nth-child(even) {
    padding-left: 0;
    border-left: none;
  }

  .flow li + li {
    border-top: 1px solid var(--line);
  }

  .value-grid {
    grid-template-columns: 1fr;
  }

  .value-grid li {
    padding: 16px 0;
  }

  .value-grid li:nth-child(even) {
    padding-left: 0;
    border-left: none;
  }

  .value-grid li + li {
    border-top: 1px solid var(--line);
  }

  .roi-results {
    grid-template-columns: 1fr;
  }

  .roi-results > div + div {
    padding-left: 0;
    border-left: none;
    border-top: 1px solid var(--line);
  }

  /* 「従来の決済との違い」表：スマホは横スクロールをやめ、項目ごとに縦積み */
  .compare-table {
    min-width: 0;
  }

  .compare-table thead {
    display: none;
  }

  .compare-table tbody,
  .compare-table tbody tr,
  .compare-table tbody th,
  .compare-table tbody td {
    display: block;
    width: 100%;
  }

  .compare-table tbody tr {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

  .compare-table tbody th {
    padding: 0 0 8px;
    border: 0;
    font-size: 14px;
    font-weight: 700;
    color: var(--ink);
  }

  .compare-table tbody td {
    padding: 3px 0;
    border: 0;
    font-size: 13px;
    line-height: 1.7;
    color: var(--gray);
  }

  .compare-table tbody td::before {
    margin-right: 6px;
    color: var(--gray-light);
    font-weight: 600;
  }

  .compare-table tbody td:not(.col-self)::before {
    content: "従来：";
  }

  .compare-table tbody td.col-self {
    border-left: 0;
    padding-left: 0;
    color: var(--ink);
    font-weight: 700;
  }

  .compare-table tbody td.col-self::before {
    content: "すてぶる：";
    color: var(--gray-light);
    font-weight: 600;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-note {
    white-space: normal;
  }
}