/* =====================================================================
   REVIX JAPAN — /low-voltage-bess/what-is/ (page04・新設)
   低圧グリーン（§3-3b #1E8A58 / deep #0F4C30）× サムネ文法（明朝×Barlow×金CTA）
   新アーキテクチャ：ヘッダ/SPメニューは common-layout.css が担当。
   本ファイル＝ベース＋コンテンツ＋パンくず＋フッタ。2026-07-03
   ===================================================================== */

:root {
  --theme: #1E8A58;
  --theme-deep: #0F4C30;
  --theme-dark: #166B44;
  --theme-tint: #EDF6F1;
  --gold: #F5B500;
  --gold-line: #E3B94F;
  --ink: #16181C;
  --sub: #5A6270;
  --border: #E2E5E8;
  --serif: "Yu Mincho", "Hiragino Mincho ProN", "MS Mincho", serif;
  --gothic: "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", Meiryo, sans-serif;
  --en: "Barlow", Arial, Helvetica, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--ink); background: #fff;
  font-family: var(--gothic); font-size: 16px; line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
body.is-menu-open { overflow: hidden; }
img { max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
button { border: 0; }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin-top: 0; }
a { color: inherit; }
summary { list-style: none; }
summary::-webkit-details-marker { display: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
#wrapper, #contents { width: 100%; }
.inner { width: min(100% - 96px, 1200px); margin-right: auto; margin-left: auto; }
.inner--narrow { max-width: 880px; }
.section { position: relative; padding: 96px 0; }
.section--surface { background: var(--theme-tint); }

.skip-link {
  position: fixed; top: 10px; left: 10px; z-index: 9999;
  padding: 10px 16px; color: var(--ink); background: var(--gold);
  text-decoration: none; transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

/* ---- パンくず ---- */
.breadcrumb { padding: 16px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: #fff; }
.breadcrumb__list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0; padding-top: 0; padding-bottom: 0; list-style: none; }
.breadcrumb__item { color: var(--sub); font-size: 13px; }
.breadcrumb__item + .breadcrumb__item::before { margin-right: 8px; color: #9AA3AD; content: "/"; }
.breadcrumb__link { color: var(--theme-deep); text-decoration: none; }

/* ---- 見出し（番号付き＝井上型。数字は大きくアウトライン） ---- */
.section-heading {
  display: grid; grid-template-columns: auto 1fr; align-items: start; gap: 24px;
  max-width: 880px; margin: 0 auto 48px;
}
.section-heading--left { margin-left: 0; }
.section-heading--compact { margin-bottom: 32px; }
.section-heading__number {
  margin: 0;
  color: transparent; -webkit-text-stroke: 1.2px rgba(30, 138, 88, 0.55);
  font-family: var(--en); font-size: 72px; font-weight: 700; line-height: 0.9;
  letter-spacing: 0.02em;
}
.section-heading--light .section-heading__number { -webkit-text-stroke-color: var(--gold-line); }
.section-heading__label {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 10px;
  color: var(--theme);
  font-family: var(--en); font-size: 12px; font-weight: 700;
  letter-spacing: 0.3em; text-transform: uppercase;
}
.section-heading__label::after { content: ""; width: 32px; height: 2px; background: var(--theme); }
.section-heading--light .section-heading__label { color: var(--gold-line); }
.section-heading--light .section-heading__label::after { background: var(--gold); }
.section-heading__title {
  margin-bottom: 12px;
  font-family: var(--serif); font-size: 25px; font-weight: 700;
  line-height: 1.5; letter-spacing: 0.02em;
}
.section-heading--light .section-heading__title { color: #fff; }
.section-heading__lead { margin-bottom: 0; color: var(--sub); font-size: 17px; line-height: 1.9; }
.section-heading--light .section-heading__lead { color: rgba(255, 255, 255, 0.82); }

/* ---- ボタン（金＝唯一の行動色） ---- */
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 14px;
  min-height: 56px; padding: 0 32px;
  border: 1px solid transparent; border-radius: 999px;
  color: var(--ink); background: var(--gold);
  box-shadow: 0 10px 26px rgba(245, 181, 0, 0.24);
  font-size: 16px; font-weight: 700; line-height: 1.4; text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease, background-color 0.25s ease;
}
.button--outline { color: var(--theme-deep); border-color: var(--theme); background: #fff; box-shadow: none; }
.button--white { color: var(--ink); background: var(--gold); }
.button--small { min-height: 44px; padding: 0 24px; font-size: 14px; }
.button--wide { min-width: 320px; }
.button__arrow { font-family: var(--en); font-size: 18px; font-weight: 400; }
@media (hover: hover) and (pointer: fine) {
  .button:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(245, 181, 0, 0.32); filter: brightness(0.94); }
  .button--outline:hover { background: var(--theme-tint); box-shadow: none; filter: none; }
}
.button:focus-visible { outline: 3px solid var(--gold); outline-offset: 4px; }
.button--outline:focus-visible { outline-color: var(--theme); }

.text-link { display: inline-flex; align-items: center; gap: 10px; color: var(--theme-deep); font-weight: 700; text-decoration: none; }
.text-link::after { content: ""; width: 8px; height: 8px; border-top: 2px solid var(--theme); border-right: 2px solid var(--theme); transform: rotate(45deg); transition: transform 0.25s ease; }
@media (hover: hover) and (pointer: fine) { .text-link:hover::after { transform: rotate(45deg) translate(2px, -2px); } }

.prose p { color: var(--sub); font-size: 16px; line-height: 1.9; }
.source-note { color: #9AA3AD; font-size: 12px; }

/* =====================================================================
   ヒーロー（白×淡緑・明朝・右ビジュアル＋スペックカード）
   ===================================================================== */
.what-is-hero { position: relative; overflow: hidden; background: linear-gradient(160deg, var(--theme-tint) 0%, #fff 60%); }
.what-is-hero__inner {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(400px, 0.95fr);
  align-items: center; gap: 64px;
  padding-top: 96px; padding-bottom: 96px;
}
.what-is-hero__eyebrow {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 20px; color: var(--theme);
  font-family: var(--en); font-size: 13px; font-weight: 700; letter-spacing: 0.3em; text-transform: uppercase;
}
.what-is-hero__eyebrow::before { content: ""; width: 40px; height: 2px; background: var(--theme); }
.what-is-hero__title {
  margin-bottom: 16px;
  font-family: var(--serif); font-size: 40px; font-weight: 700; line-height: 1.4; letter-spacing: 0.02em;
}
.what-is-hero__statement {
  margin-bottom: 16px;
  color: var(--theme-deep);
  font-family: var(--serif); font-size: 20px; font-weight: 700; line-height: 1.7;
}
.what-is-hero__lead { max-width: 560px; margin-bottom: 30px; color: var(--sub); font-size: 17px; line-height: 1.9; }
.what-is-hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }
.what-is-hero__note { margin: 18px 0 0; color: var(--sub); font-size: 12px; }
.what-is-hero__visual { position: relative; }
.what-is-hero__visual img { display: block; width: 100%; height: 500px; object-fit: cover; border-radius: 12px; filter: saturate(0.85); }
.what-is-hero__spec-card {
  position: absolute; left: 20px; bottom: 20px;
  display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
  max-width: calc(100% - 40px);
  padding: 16px 22px; border-radius: 12px;
  background: rgba(255, 255, 255, 0.94); border: 1px solid var(--border);
  box-shadow: 0 12px 32px rgba(15, 76, 48, 0.16);
}
.what-is-hero__spec-label {
  flex-basis: 100%;
  color: var(--theme);
  font-family: var(--en); font-size: 11px; font-weight: 700; letter-spacing: 0.24em;
}
.what-is-hero__spec-value { font-family: var(--en); font-size: 36px; font-weight: 700; line-height: 1; color: var(--theme-deep); }
.what-is-hero__spec-unit { color: var(--sub); font-size: 13px; font-weight: 700; }
.what-is-hero__spec-separator { color: var(--border); font-size: 24px; }
.what-is-hero__spec-note { flex-basis: 100%; color: #9AA3AD; font-size: 11px; }
@media (prefers-reduced-motion: no-preference) {
  .what-is-hero__eyebrow, .what-is-hero__title, .what-is-hero__statement,
  .what-is-hero__lead, .what-is-hero__actions, .what-is-hero__note {
    animation: wiRise 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
  }
  .what-is-hero__title { animation-delay: 0.12s; }
  .what-is-hero__statement { animation-delay: 0.22s; }
  .what-is-hero__lead { animation-delay: 0.32s; }
  .what-is-hero__actions { animation-delay: 0.44s; }
  .what-is-hero__note { animation-delay: 0.52s; }
  .what-is-hero__visual { animation: wiFade 0.9s ease 0.2s both; }
  @keyframes wiRise { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
  @keyframes wiFade { from { opacity: 0; } to { opacity: 1; } }
}

/* ---- ページ内ナビ（ピル） ---- */
.what-is-nav { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, 0.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.what-is-nav__inner { display: flex; gap: 10px; overflow-x: auto; padding-top: 12px; padding-bottom: 12px; }
.what-is-nav__link {
  flex: 0 0 auto;
  padding: 9px 20px; border: 1px solid var(--border); border-radius: 999px;
  color: var(--theme-deep); font-size: 13px; font-weight: 700; text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
@media (hover: hover) and (pointer: fine) {
  .what-is-nav__link:hover { border-color: var(--theme); background: var(--theme-tint); }
}

/* =====================================================================
   01 DEFINITION（定義＋概念図 系↔蓄↔束↔市）
   ===================================================================== */
.definition__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: 56px; }
.definition__answer {
  margin-bottom: 18px;
  color: var(--ink);
  font-family: var(--serif); font-size: 19px; font-weight: 700; line-height: 1.9;
}
.definition__diagram {
  display: flex; align-items: center; justify-content: space-between; gap: 6px;
  padding: 32px 24px; border: 1px solid var(--border); border-radius: 12px; background: var(--theme-tint);
}
.definition__node { display: grid; justify-items: center; gap: 8px; text-align: center; }
.definition__icon {
  display: grid; place-items: center; width: 58px; height: 58px; border-radius: 999px;
  border: 2px solid var(--theme); background: #fff;
  color: var(--theme-deep); font-family: var(--serif); font-size: 22px; font-weight: 700;
}
.definition__node--battery .definition__icon { background: var(--theme-deep); border-color: var(--theme-deep); color: #fff; }
.definition__node strong { font-size: 13px; font-weight: 700; }
.definition__node small { color: var(--sub); font-size: 11px; }
.definition__flow { color: var(--theme); font-size: 20px; font-weight: 700; }

/* =====================================================================
   02 DIFFERENCE（比較表）
   ===================================================================== */
.difference__table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
.difference__table { width: 100%; min-width: 640px; border-collapse: collapse; background: #fff; }
.difference__caption { padding: 14px; color: var(--sub); font-size: 12px; caption-side: bottom; text-align: left; }
.difference__table th, .difference__table td { padding: 16px 20px; border-bottom: 1px solid var(--border); font-size: 14px; line-height: 1.7; text-align: left; vertical-align: top; }
.difference__table thead th {
  color: #fff; background: var(--theme-deep);
  font-family: var(--serif); font-size: 15px; letter-spacing: 0.04em; white-space: nowrap;
}
.difference__table tbody th { width: 168px; color: var(--theme-deep); background: var(--theme-tint); font-weight: 700; white-space: nowrap; }
.difference__table tbody tr:last-child th, .difference__table tbody tr:last-child td { border-bottom: 0; }
.difference__note { margin: 14px 0 0; color: var(--sub); font-size: 12px; }

/* =====================================================================
   WHY NOW（需給バランスの図）
   ===================================================================== */
.why-now__inner { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr); align-items: center; gap: 64px; }
.why-now__highlight {
  padding-left: 18px; border-left: 3px solid var(--theme);
  color: var(--ink); font-family: var(--serif); font-size: 18px; font-weight: 700; line-height: 1.9;
}
.why-now__visual { display: grid; gap: 20px; justify-items: center; }
.why-now__balance { display: flex; align-items: center; gap: 16px; }
.why-now__metric {
  display: grid; place-items: center; width: 130px; height: 130px; border-radius: 12px;
  border: 1px solid var(--border); background: #fff;
  font-weight: 700; text-align: center; font-size: 14px;
  box-shadow: 0 10px 26px rgba(15, 76, 48, 0.08);
}
.why-now__metric--supply { color: var(--theme-deep); border-top: 3px solid var(--theme); }
.why-now__metric--demand { color: var(--theme-deep); border-top: 3px solid var(--gold); }
.why-now__equal { color: var(--theme); font-family: var(--en); font-size: 34px; font-weight: 700; }
.why-now__battery {
  position: relative;
  display: grid; place-items: center;
  padding: 14px 30px; border-radius: 999px;
  color: #fff; background: var(--theme-deep); font-size: 14px; font-weight: 700;
}
.why-now__pulse { position: absolute; inset: 0; border-radius: 999px; border: 2px solid var(--theme); }
@media (prefers-reduced-motion: no-preference) {
  .why-now__pulse { animation: wiPulse 2.4s ease-out infinite; }
  @keyframes wiPulse { 0% { opacity: 0.8; transform: scale(1); } 100% { opacity: 0; transform: scale(1.35); } }
}

/* =====================================================================
   03 MECHANISM（濃緑バンド・4ステップ）＝ページの「格」
   ===================================================================== */
.mechanism.section--dark { color: #fff; background: linear-gradient(135deg, var(--theme-dark) 0%, var(--theme-deep) 100%); }
.mechanism__steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  margin: 0 0 36px; padding: 0; list-style: none;
  counter-reset: none;
}
.mechanism__step {
  position: relative;
  padding: 28px 22px;
  border: 1px solid rgba(227, 185, 79, 0.3); border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
}
.mechanism__step-number {
  display: block; margin-bottom: 14px;
  color: transparent; -webkit-text-stroke: 1px var(--gold-line);
  font-family: var(--en); font-size: 44px; font-weight: 700; line-height: 1;
}
.mechanism__step-icon { display: none; }
.mechanism__step-title { margin-bottom: 8px; color: #fff; font-family: var(--serif); font-size: 17px; font-weight: 700; }
.mechanism__step-text { margin: 0; color: rgba(255, 255, 255, 0.78); font-size: 13px; line-height: 1.8; }
.mechanism__notice { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; color: rgba(255, 255, 255, 0.75); font-size: 13px; }

/* =====================================================================
   SYSTEM（写真＋構成要素リスト）
   ===================================================================== */
.system__inner { display: grid; grid-template-columns: minmax(380px, 0.9fr) minmax(0, 1.1fr); align-items: center; gap: 64px; }
.system__visual img { display: block; width: 100%; height: 460px; object-fit: cover; border-radius: 12px; filter: saturate(0.85); }
.system__lead { margin-bottom: 24px; color: var(--sub); font-size: 17px; line-height: 1.9; }
.system__list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.system__item {
  position: relative;
  padding: 14px 0 14px 30px;
  border-bottom: 1px solid var(--border);
  font-size: 15px; font-weight: 700;
}
.system__item:first-child { border-top: 1px solid var(--border); }
.system__item::before {
  content: ""; position: absolute; left: 2px; top: 24px;
  width: 14px; height: 8px;
  border-left: 2.5px solid var(--theme); border-bottom: 2.5px solid var(--theme);
  transform: rotate(-45deg);
}

/* =====================================================================
   04 ROUTES（立場別2カード）
   ===================================================================== */
.routes__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.routes__card {
  position: relative;
  padding: 40px 36px 32px;
  border: 1px solid var(--border); border-radius: 12px; background: #fff;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
@media (hover: hover) and (pointer: fine) {
  .routes__card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(15, 76, 48, 0.12); }
}
.routes__card-label {
  margin-bottom: 6px; color: var(--theme);
  font-family: var(--en); font-size: 12px; font-weight: 700; letter-spacing: 0.24em;
}
.routes__card-number {
  position: absolute; top: 24px; right: 28px;
  color: transparent; -webkit-text-stroke: 1px rgba(30, 138, 88, 0.45);
  font-family: var(--en); font-size: 56px; font-weight: 700; line-height: 1;
}
.routes__card-title { margin-bottom: 12px; font-family: var(--serif); font-size: 22px; font-weight: 700; }
.routes__card-text { margin-bottom: 18px; color: var(--sub); font-size: 15px; line-height: 1.8; }
.routes__points { display: grid; gap: 8px; margin: 0 0 22px; padding: 0; list-style: none; }
.routes__points li { position: relative; padding-left: 24px; font-size: 14px; font-weight: 700; }
.routes__points li::before {
  content: ""; position: absolute; left: 0; top: 7px;
  width: 13px; height: 7px;
  border-left: 2.5px solid var(--theme); border-bottom: 2.5px solid var(--theme);
  transform: rotate(-45deg);
}
.routes__link {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--theme-deep); font-size: 15px; font-weight: 700; text-decoration: none;
}
.routes__link::after {
  content: ""; width: 8px; height: 8px;
  border-top: 2px solid var(--theme); border-right: 2px solid var(--theme);
  transform: rotate(45deg); transition: transform 0.25s ease;
}
@media (hover: hover) and (pointer: fine) {
  .routes__card:hover .routes__link::after { transform: rotate(45deg) translate(2px, -2px); }
}

/* =====================================================================
   05 CONDITIONS（5カード）
   ===================================================================== */
.conditions__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.conditions__card {
  padding: 30px 24px;
  border: 1px solid var(--border); border-radius: 12px; background: var(--theme-tint);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
@media (hover: hover) and (pointer: fine) {
  .conditions__card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(15, 76, 48, 0.1); }
}
.conditions__icon {
  display: block; margin-bottom: 12px;
  color: transparent; -webkit-text-stroke: 1px rgba(30, 138, 88, 0.55);
  font-family: var(--en); font-size: 44px; font-weight: 700; line-height: 1;
}
.conditions__title { margin-bottom: 8px; font-family: var(--serif); font-size: 18px; font-weight: 700; }
.conditions__text { margin: 0; color: var(--sub); font-size: 14px; line-height: 1.8; }

/* =====================================================================
   CTAバンド（中間）
   ===================================================================== */
.cta-band { color: #fff; background: linear-gradient(120deg, var(--theme-deep) 0%, var(--theme-dark) 100%); }
.cta-band__inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px;
  padding-top: 56px; padding-bottom: 56px;
}
.cta-band__label {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 10px;
  color: var(--gold-line);
  font-family: var(--en); font-size: 12px; font-weight: 700; letter-spacing: 0.3em;
}
.cta-band__label::after { content: ""; width: 32px; height: 2px; background: var(--gold); }
.cta-band__title { margin-bottom: 8px; font-family: var(--serif); font-size: 24px; font-weight: 700; color: #fff; }
.cta-band__text { margin: 0; color: rgba(255, 255, 255, 0.8); font-size: 14px; }

/* =====================================================================
   SUPPORT（伴走・写真＋フロー）
   ===================================================================== */
.support__inner { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr); align-items: center; gap: 64px; }
.support__label {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 12px; color: var(--theme);
  font-family: var(--en); font-size: 12px; font-weight: 700; letter-spacing: 0.3em;
}
.support__label::after { content: ""; width: 32px; height: 2px; background: var(--theme); }
.support__title { margin-bottom: 14px; font-family: var(--serif); font-size: 25px; font-weight: 700; line-height: 1.5; }
.support__lead { margin-bottom: 28px; color: var(--sub); font-size: 16px; line-height: 1.9; }
.support__flow { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; counter-reset: sflow; }
.support__flow li {
  position: relative; counter-increment: sflow;
  padding: 16px 0 16px 64px;
  border-bottom: 1px solid rgba(30, 138, 88, 0.25);
  font-size: 15px; font-weight: 700;
}
.support__flow li:first-child { border-top: 1px solid rgba(30, 138, 88, 0.25); }
.support__flow li::before {
  content: counter(sflow, decimal-leading-zero);
  position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 999px;
  color: #fff; background: var(--theme);
  font-family: var(--en); font-size: 15px; font-weight: 700;
}
.support__visual img { display: block; width: 100%; height: 440px; object-fit: cover; border-radius: 12px; filter: saturate(0.85); }

/* =====================================================================
   FAQ（白カード×緑＋）
   ===================================================================== */
.faq__list { display: grid; gap: 12px; }
.faq__item { border: 1px solid var(--border); border-radius: 12px; background: #fff; transition: box-shadow 0.25s ease; }
.faq__item[open] { box-shadow: 0 12px 32px rgba(15, 76, 48, 0.08); }
.faq__question { display: grid; grid-template-columns: 44px 1fr 24px; align-items: center; gap: 14px; padding: 22px 24px; cursor: pointer; }
.faq__mark {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 999px;
  color: #fff; background: var(--theme-deep);
  font-family: var(--en); font-size: 15px; font-weight: 700;
}
.faq__mark--answer { color: var(--theme-deep); background: var(--theme-tint); }
.faq__question-text { font-size: 16px; font-weight: 700; }
.faq__toggle { position: relative; width: 16px; height: 16px; }
.faq__toggle::before, .faq__toggle::after { content: ""; position: absolute; top: 50%; left: 50%; background: var(--theme); transition: transform 0.25s ease; }
.faq__toggle::before { width: 16px; height: 2.5px; transform: translate(-50%, -50%); }
.faq__toggle::after { width: 2.5px; height: 16px; transform: translate(-50%, -50%); }
.faq__item[open] .faq__toggle::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq__answer { display: grid; grid-template-columns: 44px 1fr; gap: 14px; padding: 0 24px 26px; }
.faq__answer-text { margin: 0; color: var(--sub); font-size: 15px; line-height: 1.9; }
.faq__more { margin-top: 32px; text-align: center; }

/* =====================================================================
   最終CTA＋参照
   ===================================================================== */
.final-cta { color: #fff; background: linear-gradient(150deg, var(--theme-deep) 0%, var(--theme-dark) 100%); }
.final-cta__inner { padding-top: 96px; padding-bottom: 96px; text-align: center; }
.final-cta__label {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  margin-bottom: 16px;
  color: var(--gold-line);
  font-family: var(--en); font-size: 12px; font-weight: 700; letter-spacing: 0.3em;
}
.final-cta__label::before, .final-cta__label::after { content: ""; width: 32px; height: 1px; background: var(--gold); }
.final-cta__title { max-width: 760px; margin: 0 auto 20px; font-family: var(--serif); font-size: 25px; font-weight: 700; line-height: 1.6; color: #fff; }
.final-cta__text { max-width: 640px; margin: 0 auto 32px; color: rgba(255, 255, 255, 0.85); font-size: 15px; line-height: 1.9; }
.final-cta__actions { display: grid; justify-items: center; gap: 20px; }
.final-cta__sub-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 28px; }
.final-cta__sub-link { color: rgba(255, 255, 255, 0.85); font-size: 14px; font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }

.references { background: #F7F8F9; }
.references__inner { padding-top: 48px; padding-bottom: 48px; }
.references__title { margin-bottom: 14px; font-family: var(--serif); font-size: 16px; font-weight: 700; }
.references__list { margin: 0 0 12px; padding-left: 18px; color: var(--sub); font-size: 13px; line-height: 2; }
.references__link { color: var(--theme-deep); text-decoration: underline; text-underline-offset: 3px; }
.references__note { margin: 0; color: #9AA3AD; font-size: 12px; line-height: 1.8; }

/* =====================================================================
   フッター（共通・グリーン適用）
   ===================================================================== */
.footer { color: #000; font-family: var(--gothic); }
.footer__inner { box-sizing: border-box; margin: 100px 0; padding: 0 50px; }
.footer__top { display: flex; }
.footer__intro { display: flex; flex: 0 0 400px; flex-direction: column; }
.footer__copy { display: block; width: 355px; margin: 0; }
.footer__copy img { display: block; width: 100%; height: auto; }
.footer__description { display: block; margin: 30px 0 0; font-size: 14px; font-weight: 400; line-height: 1.9; }
.footer__nav { width: calc(100% - 400px); }
.footer__columns { display: flex; justify-content: space-between; width: 100%; margin: 0; padding: 24px 0 28px; list-style: none; }
.footer__column { display: flex; flex-direction: column; box-sizing: border-box; width: 33.3333%; padding: 0 35px; gap: 10px; }
.footer__column--center { border-left: 1px dotted var(--border); }
.footer__heading { display: flex; align-items: center; color: #000; font-size: 15px; font-weight: 600; line-height: 1.6; text-decoration: none; }
.footer__heading--spaced { margin-top: 15px; }
.footer__heading span {
  position: relative; bottom: -1px; display: block; width: 17px; margin-left: 5px;
  border-radius: 50%; aspect-ratio: 1;
  background: linear-gradient(135deg, var(--theme-deep) 0%, var(--theme) 100%);
}
.footer__heading span::before {
  position: absolute; top: 50%; left: 50%; z-index: 2; display: block; width: 7px; content: "";
  transform: translate(-25%, -50%);
  clip-path: polygon(0 15%, 15% 0, 65% 50%, 15% 100%, 0 85%, 35% 50%, 0 15%);
  aspect-ratio: 1; background-color: #fff;
}
.footer__group { margin: 0; }
.footer__summary {
  position: relative; display: flex; align-items: center; justify-content: space-between;
  color: #000; font-size: 14px; font-weight: 500; line-height: 1.6; cursor: pointer; transition: color 0.3s ease;
}
.footer__summary::-webkit-details-marker { display: none; }
.footer__summary::after {
  display: block; width: 13px; content: ""; transition: background-color 0.3s ease;
  clip-path: polygon(0 45%, 45% 45%, 45% 0, 55% 0, 55% 45%, 100% 45%, 100% 55%, 55% 55%, 55% 100%, 45% 100%, 45% 55%, 0 55%);
  aspect-ratio: 1; background-color: #000;
}
.footer__group[open] .footer__summary::after { clip-path: polygon(0 45%, 100% 45%, 100% 55%, 0 55%); }
.footer__links { display: flex; flex-direction: column; box-sizing: border-box; margin: 5px 0; padding: 15px; border-radius: 6px; background-color: var(--theme-tint); }
.footer__nav-link { display: block; color: #000; font-size: 13px; font-weight: 400; line-height: 1.65; text-decoration: none; transition: color 0.3s ease; }
.footer__bottom { display: flex; align-items: flex-start; margin-top: 50px; }
.footer__company { display: flex; flex-direction: column; gap: 20px 0; }
.footer__brand-row { display: flex; align-items: center; gap: 0 30px; }
.footer__logo { display: block; width: 200px; }
.footer__bess { display: block; width: 170px; }
.footer__logo img, .footer__bess img { display: block; width: 100%; height: auto; }
.footer__link { display: flex; align-items: center; gap: 0 5px; color: #000; font-size: 14px; font-weight: 400; line-height: 1.4; text-decoration: none; }
.footer__link span { display: block; width: 15px; line-height: 1; }
.footer__link img { display: block; width: 100%; height: auto; }
.footer__copyright { margin: 0; color: #000; font-size: 11px; font-weight: 400; line-height: 1.6; }
.footer__copyright--mobile { display: none; }
@media (hover: hover) and (pointer: fine) {
  .footer__heading:hover, .footer__summary:hover, .footer__nav-link:hover, .footer__link:hover { color: var(--theme); }
  .footer__summary:hover::after { background-color: var(--theme); }
}
@media (max-width: 1350px) {
  .footer__top { flex-direction: column; }
  .footer__intro { flex-basis: auto; width: 100%; }
  .footer__description br { display: none; }
  .footer__nav { width: 100%; margin-top: 50px; }
  .footer__column { width: 31.6666%; padding: 0; }
}
@media (max-width: 850px) {
  .footer__inner { margin: 50px 0; padding: 0 30px; }
  .footer__intro { align-items: center; }
  .footer__copy { width: 300px; }
  .footer__description { max-width: 500px; margin: 10px auto 0; text-align: center; }
  .footer__nav { display: none; }
  .footer__bottom { flex-direction: column; align-items: center; margin-top: 20px; }
  .footer__brand-row { flex-direction: column; align-items: center; gap: 20px 0; width: 100%; }
  .footer__copyright--desktop { display: none; }
  .footer__company { align-items: center; width: 100%; gap: 24px 0; }
  .footer__logo { width: 180px; }
  .footer__bess { width: 150px; }
  .footer__link { justify-content: center; font-size: 13px; }
  .footer__copyright--mobile { display: block; margin-top: 30px; text-align: center; }
}
@media (max-width: 568px) { .footer__inner { padding: 0 20px; } .footer__copy { width: min(100%, 300px); } }

/* =====================================================================
   レスポンシブ
   ===================================================================== */
@media (max-width: 1100px) {
  .what-is-hero__inner, .definition__grid, .why-now__inner, .system__inner, .support__inner {
    grid-template-columns: 1fr; gap: 44px;
  }
  .system__visual { order: 2; }
  .conditions__grid { grid-template-columns: repeat(2, 1fr); }
  .mechanism__steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 850px) {
  .inner { width: min(100% - 40px, 680px); }
  .section { padding: 48px 0; }
  .section-heading { grid-template-columns: 1fr; gap: 8px; margin-bottom: 32px; }
  .section-heading__number { font-size: 48px; }
  .section-heading__title { font-size: 21px; }
  .section-heading__lead { font-size: 15px; }
  .button { width: 100%; min-height: 52px; }
  .button--wide { min-width: 0; }
  .breadcrumb { padding: 11px 0; }

  .what-is-hero__inner { padding-top: 48px; padding-bottom: 48px; }
  .what-is-hero__title { font-size: 29px; }
  .what-is-hero__statement { font-size: 17px; }
  .what-is-hero__lead { font-size: 15px; }
  .what-is-hero__actions { display: grid; gap: 10px; }
  .what-is-hero__visual img { height: 300px; }
  .what-is-hero__spec-value { font-size: 28px; }

  .definition__diagram { flex-wrap: wrap; justify-content: center; gap: 12px; }
  .definition__flow { display: none; }

  .why-now__metric { width: 104px; height: 104px; font-size: 12px; }

  .mechanism__steps { grid-template-columns: 1fr; gap: 12px; }
  .routes__grid { grid-template-columns: 1fr; gap: 16px; }
  .routes__card { padding: 28px 24px; }
  .conditions__grid { grid-template-columns: 1fr; gap: 12px; }

  .cta-band__inner { padding-top: 40px; padding-bottom: 40px; }
  .cta-band__title { font-size: 20px; }

  .support__visual img { height: 300px; }

  .faq__question { grid-template-columns: 38px 1fr 18px; gap: 10px; padding: 20px 18px; }
  .faq__mark { width: 34px; height: 34px; font-size: 13px; }
  .faq__question-text { font-size: 15px; }
  .faq__answer { grid-template-columns: 38px 1fr; gap: 10px; padding: 0 18px 22px; }

  .final-cta__inner { padding-top: 64px; padding-bottom: 64px; }
  .final-cta__title { font-size: 21px; }
}

/* ===== headerfix2_20260704 ===== */

/* ===== HEADER/SP-MENU PORT from page03.css (headerfix_20260704+headercolor_20260704) 共通ヘッダー整合・緑固定 ===== */
.header{position: relative; z-index: 100; width: 100%; color: #000; background: #fff;}
.header *, .header *::before, .header *::after{box-sizing: border-box;}
.header__inner{width: 100%; padding: 0 50px;}
.header__top{display: flex; align-items: center; justify-content: space-between;}
.header__brand{padding-top: 0;}
.header__logo{display: block; width: 200px; line-height: 0;}
.header__logo img{display: block; width: 100%; height: auto;}
.header__tagline{margin: 10px 0 0; color: #000; font-size: 14px; font-weight: 500; line-height: 1.6;}
.header__utility{display: flex; align-items: center; gap: 30px;}
.header__lang{position: relative; flex: 0 0 auto;}
.header__lang-button{display: inline-flex; align-items: center; justify-content: center;
  width: 112px; height: 44px; padding: 0 14px;
  border: 1px solid #d9d9d9; border-radius: 6px;
  color: #000; background: #fff; font: inherit; font-size: 14px; font-weight: 500; line-height: 1; cursor: pointer;}
.header__lang-arrow{width: 7px; height: 7px; margin-left: 10px;
  border-right: 1px solid currentColor; border-bottom: 1px solid currentColor;
  transform: translateY(-2px) rotate(45deg); transition: transform 0.2s ease;}
.header__lang.is-open .header__lang-arrow{transform: translateY(2px) rotate(225deg);}
.header__lang-menu{position: absolute; top: calc(100% + 8px); right: 0; z-index: 10;
  display: grid; width: 150px; padding: 8px;
  border: 1px solid #d9d9d9; border-radius: 6px; visibility: hidden; background: #fff;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1); opacity: 0; transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;}
.header__lang.is-open .header__lang-menu{visibility: visible; opacity: 1; transform: translateY(0);}
.header__lang-link{display: block; padding: 10px 12px; border-radius: 4px; color: #000; font-size: 14px; font-weight: 400; line-height: 1.4; text-decoration: none;}
.header__lang-link.is-current{background: #EDF6F1; font-weight: 600;}
.header__actions{position: relative; top: -45px;
  display: flex; align-items: center; justify-content: center; gap: 20px;
  width: auto; padding: 100px 20px 20px;
  border-radius: 0 0 10px 10px; background: #1E8A58;}
.header__action-link{display: inline-flex; align-items: center; justify-content: center; gap: 5px;
  min-height: 32px; padding: 0 10px;
  color: #fff; font-size: 16px; font-weight: 500; line-height: 1; white-space: nowrap; text-decoration: none;}
.header__action-link img{display: block; flex: 0 0 auto; width: auto; max-height: 18px;}
.header__nav{display: flex; align-items: center; justify-content: flex-end; gap: 30px; margin-top: 10px;}
.header__nav-link{color: #000; font-size: 17px; font-weight: 500; line-height: 1.4; text-decoration: none;}
.header__lang-button:focus-visible, .header__lang-link:focus-visible, .header__action-link:focus-visible, .header__nav-link:focus-visible, .header__logo:focus-visible{outline: 2px solid #1E8A58; outline-offset: 3px;}
.sp-menu{display: none;}
.sp-menu__button{position: fixed; top: 18px; right: 18px; z-index: 1002;
  display: none; width: 46px; height: 46px; padding: 12px 10px;
  border-radius: 50%; background: #0F4C30;
  box-shadow: 0 10px 28px rgba(15, 76, 48, 0.28);}
.sp-menu__line{display: block; width: 22px; height: 2px; margin: 4px auto; background: #fff; transition: transform 0.3s ease, opacity 0.3s ease;}
.sp-menu__panel{position: fixed; inset: 0; z-index: 1001;
  display: flex; visibility: hidden; flex-direction: column; justify-content: center;
  padding: 100px 30px 40px; color: #fff; background: rgba(15, 76, 48, 0.98);
  opacity: 0; transition: visibility 0.3s ease, opacity 0.3s ease;}
.sp-menu__nav{display: grid; gap: 4px;}
.sp-menu__link{padding: 14px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.16); font-size: 18px; font-weight: 700; text-decoration: none;}
.sp-menu.is-open .sp-menu__panel{visibility: visible; opacity: 1;}
.sp-menu.is-open .sp-menu__line:nth-child(1){transform: translateY(6px) rotate(45deg);}
.sp-menu.is-open .sp-menu__line:nth-child(2){opacity: 0;}
.sp-menu.is-open .sp-menu__line:nth-child(3){transform: translateY(-6px) rotate(-45deg);}
@media (hover: hover) and (pointer: fine){
.header__lang-button:hover{border-color: #1E8A58;}
.header__lang-link:hover{background: #EDF6F1;}
.header__action-link:hover{opacity: 0.82;}
.header__nav-link:hover{color: #1E8A58;}
}
@media (max-width: 1250px){
.header__utility{gap: 20px;}
.header__nav{gap: 22px;}
}
@media (max-width: 1024px){
.header__inner{padding: 0 35px;}
.header__tagline{display: none;}
}
@media (max-width: 850px){
.header__inner{padding: 14px 30px;}
.header__top{align-items: center; gap: 16px;}
.header__logo{width: 160px;}
.header__utility{margin-left: auto;}
.header__lang-button{width: 98px; height: 40px; padding: 0 12px; font-size: 13px;}
.header__lang-menu{width: 140px;}
.header__actions, .header__nav{display: none;}
.sp-menu, .sp-menu__button{display: block;}
}
@media (max-width: 568px){
.header__inner{padding-right: 20px; padding-left: 20px;}
.header__logo{width: 145px;}
}