/* 電道 — dendou.fujibit.com (index / privacy / support 共通) */
:root {
  --bg: #060914;
  --bg-2: #0b1124;
  --card: rgba(255, 255, 255, 0.035);
  --card-hover: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #eaf0fb;
  --muted: #98a3bf;
  --dim: #66708c;
  --yellow: #ffd54f;
  --amber: #ffb020;
  --blue: #4a9eff;
  --violet: #8b8cff;
  --green: #45d483;
  --red: #ff6b6b;
  --radius: 20px;
  --sans: "Inter", "Noto Sans JP", system-ui, -apple-system, "Hiragino Sans", "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
html, body { overflow-x: clip; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
::selection { background: rgba(255, 213, 79, 0.35); }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

/* 背景の格子と光 */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 100%);
}
.bg-glow {
  position: absolute; z-index: -1; pointer-events: none; border-radius: 50%; filter: blur(110px); opacity: 0.55;
}

/* ヘッダー */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  background: rgba(6, 9, 20, 0.55);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.site-header.scrolled { border-bottom-color: var(--line); background: rgba(6, 9, 20, 0.82); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; letter-spacing: 0.02em; }
.logo:hover { text-decoration: none; }
.logo img { width: 30px; height: 30px; border-radius: 8px; }
.logo .ja { font-size: 20px; color: var(--yellow); }
.logo .en { font-size: 12px; color: var(--muted); font-weight: 600; letter-spacing: 0.14em; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { color: var(--muted); font-size: 14px; font-weight: 500; padding: 8px 12px; border-radius: 10px; transition: color 0.2s, background 0.2s; }
.nav a:hover { color: var(--text); background: var(--card-hover); text-decoration: none; }
.nav .nav-cta { color: #10131f; background: var(--yellow); font-weight: 700; margin-inline-start: 6px; }
.nav .nav-cta:hover { color: #10131f; background: #ffe17f; }
@media (max-width: 760px) { .nav a:not(.nav-cta) { display: none; } }

/* ボタン */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 22px; border-radius: 14px; font-weight: 700; font-size: 15px;
  border: 1px solid var(--line-strong); color: var(--text); background: var(--card);
  transition: transform 0.2s, background 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); background: var(--card-hover); border-color: rgba(255, 255, 255, 0.28); }
.btn svg { width: 20px; height: 20px; flex: none; }
.btn small { display: block; font-size: 10px; font-weight: 600; color: var(--muted); letter-spacing: 0.06em; line-height: 1.2; }
.btn .btn-text { display: flex; flex-direction: column; line-height: 1.25; text-align: left; }
.btn-primary { background: var(--yellow); color: #10131f; border-color: transparent; box-shadow: 0 10px 40px -10px rgba(255, 213, 79, 0.6); }
.btn-primary small { color: rgba(16, 19, 31, 0.65); }
.btn-primary:hover { background: #ffe17f; border-color: transparent; box-shadow: 0 14px 50px -10px rgba(255, 213, 79, 0.75); }

/* ヒーロー */
.hero { position: relative; padding: 72px 0 56px; overflow-x: clip; }
.hero-inner { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 960px) { .hero-inner { grid-template-columns: 1fr; gap: 40px; } .hero { padding-top: 40px; } }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 8px; border-radius: 999px; border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04); color: var(--muted); font-size: 13px; font-weight: 500;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px var(--green); margin-inline-start: 6px; }
.hero-title {
  font-size: clamp(44px, 7.4vw, 84px); line-height: 1.08; font-weight: 900; letter-spacing: -0.02em;
  margin: 22px 0 22px;
}
.hero-title .glow {
  background: linear-gradient(100deg, var(--yellow) 10%, #fff3b0 45%, var(--amber) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 28px rgba(255, 213, 79, 0.35));
}
.hero-lead { color: var(--muted); font-size: clamp(16px, 1.9vw, 18px); max-width: 560px; margin: 0 0 30px; }
.hero-lead strong { color: var(--text); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 12.5px; color: var(--muted); padding: 5px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, 0.02);
}

/* ヒーローの回路 */
.circuit-card {
  position: relative; border-radius: 28px; padding: 22px;
  background: linear-gradient(180deg, rgba(20, 30, 60, 0.75), rgba(10, 14, 30, 0.85));
  border: 1px solid var(--line-strong);
  box-shadow: 0 40px 120px -40px rgba(74, 158, 255, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.circuit-card::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: linear-gradient(140deg, rgba(255, 213, 79, 0.55), transparent 35%, transparent 65%, rgba(74, 158, 255, 0.55));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
.circuit-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-size: 12px; color: var(--dim); font-family: var(--mono); }
.circuit-top .live { color: var(--green); display: inline-flex; align-items: center; gap: 6px; }
.circuit-top .live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; box-shadow: 0 0 10px currentColor; }
.circuit.off .live { color: var(--red); }
.circuit svg { width: 100%; height: auto; overflow: visible; }
.circuit .wire { stroke: #7f86ff; stroke-width: 4; fill: none; stroke-linejoin: round; transition: stroke 0.4s; }
.circuit.off .wire { stroke: #3a3f66; }
.circuit .sym { stroke: #fff; stroke-width: 4; fill: none; stroke-linecap: round; }
.circuit .mask { fill: #0f1730; }
.circuit .particles circle { fill: #fff27a; filter: url(#dotglow); transition: opacity 0.35s; }
.circuit.off .particles circle { opacity: 0; }
.circuit .bulb-glow { transition: opacity 0.4s; animation: flicker 3.2s ease-in-out infinite; transform-origin: center; transform-box: fill-box; }
.circuit.off .bulb-glow { opacity: 0; animation: none; }
.circuit .bulb-body { fill: #caa23a; transition: fill 0.4s; }
.circuit.off .bulb-body { fill: #2a2f48; }
.circuit .lever { transition: transform 0.35s cubic-bezier(.5, 1.6, .4, 1); transform-origin: 205px 60px; transform-box: view-box; }
.circuit.off .lever { transform: rotate(-28deg); }
.circuit .switch-hit { cursor: pointer; }
.circuit .switch-hit:hover + .switch-ring, .circuit .switch-ring.pulse { opacity: 1; }
.circuit .switch-ring { fill: none; stroke: var(--yellow); stroke-width: 2; opacity: 0.0; transition: opacity 0.2s; animation: ring 2.4s ease-out infinite; transform-origin: 240px 60px; transform-box: view-box; }
.circuit .label { fill: #c9d1e8; font: 600 14px var(--sans); }
.circuit .value { fill: var(--green); font: 700 14px var(--mono); transition: fill 0.3s; }
.circuit.off .value.live-value { fill: var(--dim); }
.hint-tap {
  position: absolute; top: 56px; left: 50%; transform: translateX(-50%);
  font-size: 12px; color: #10131f; background: var(--yellow); padding: 4px 10px; border-radius: 999px; font-weight: 700;
  pointer-events: none; white-space: nowrap; animation: bob 2s ease-in-out infinite;
}
.hint-tap::after { content: ""; position: absolute; left: 50%; bottom: -5px; transform: translateX(-50%); border: 5px solid transparent; border-top-color: var(--yellow); border-bottom: 0; }
.readout { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 10px; }
.readout div { background: rgba(255, 255, 255, 0.035); border: 1px solid var(--line); border-radius: 12px; padding: 8px 10px; }
.readout span { display: block; font-size: 11px; color: var(--dim); }
.readout b { font: 700 16px var(--mono); color: var(--text); transition: color 0.3s; }
.circuit.off .readout b.live-value { color: var(--dim); }
@media (max-width: 520px) { .readout { grid-template-columns: repeat(2, 1fr); } }

@keyframes flicker { 0%, 100% { opacity: 0.95; transform: scale(1); } 50% { opacity: 0.75; transform: scale(0.94); } }
@keyframes ring { 0% { r: 18; opacity: 0.8; } 100% { r: 40; opacity: 0; } }
@keyframes bob { 0%, 100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, -4px); } }

/* 数字の帯 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.stats div { padding: 26px 20px; text-align: center; border-inline-end: 1px solid var(--line); }
.stats div:last-child { border-inline-end: 0; }
.stats b { display: block; font: 800 clamp(30px, 4vw, 42px)/1.1 var(--sans); letter-spacing: -0.02em; background: linear-gradient(180deg, #fff, #b9c3dd); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stats span { color: var(--muted); font-size: 13px; }
@media (max-width: 720px) { .stats { grid-template-columns: repeat(2, 1fr); } .stats div:nth-child(2) { border-inline-end: 0; } .stats div:nth-child(-n+2) { border-bottom: 1px solid var(--line); } }

/* セクション */
.section { padding: 96px 0; position: relative; overflow-x: clip; }
@media (max-width: 640px) { .section { padding: 72px 0; } }
.kicker { font: 700 12px var(--mono); letter-spacing: 0.18em; color: var(--yellow); text-transform: uppercase; margin-bottom: 14px; }
.section-title { font-size: clamp(30px, 4.4vw, 46px); line-height: 1.2; font-weight: 900; letter-spacing: -0.01em; margin: 0 0 16px; }
.section-lead { color: var(--muted); font-size: 17px; max-width: 680px; margin: 0 0 48px; }
.center { text-align: center; }
.center .section-lead { margin-left: auto; margin-right: auto; }

/* 機能カード */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 960px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid { grid-template-columns: 1fr; } }
.card {
  position: relative; border-radius: var(--radius); padding: 26px; background: var(--card); border: 1px solid var(--line);
  transition: transform 0.3s, background 0.3s, border-color 0.3s; overflow: hidden;
}
.card:hover { transform: translateY(-4px); background: var(--card-hover); border-color: var(--line-strong); }
.card::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity 0.3s;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 213, 79, 0.10), transparent 40%);
}
.card:hover::after { opacity: 1; }
.icon {
  width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(255, 213, 79, 0.18), rgba(74, 158, 255, 0.14)); border: 1px solid var(--line-strong);
}
.icon svg { width: 24px; height: 24px; stroke: var(--yellow); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { margin: 0 0 8px; font-size: 18px; font-weight: 800; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.badge { display: inline-block; font: 700 10.5px var(--mono); letter-spacing: 0.08em; padding: 3px 8px; border-radius: 6px; vertical-align: middle; }
.badge.free { color: var(--green); background: rgba(69, 212, 131, 0.12); border: 1px solid rgba(69, 212, 131, 0.3); }
.badge.pro { color: #10131f; background: var(--yellow); }

/* 2 カラム */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 36px; } }
.checks { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 12px; }
.checks li { display: flex; gap: 12px; color: var(--muted); }
.checks li::before { content: ""; flex: none; width: 20px; height: 20px; margin-top: 4px; border-radius: 6px; background: rgba(255, 213, 79, 0.16) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffd54f' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/14px no-repeat; }
.checks b { color: var(--text); font-weight: 600; }

/* 波形カード */
.scope {
  border-radius: 24px; padding: 22px; border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(14, 22, 46, 0.9), rgba(8, 12, 26, 0.95));
  box-shadow: 0 40px 100px -40px rgba(255, 213, 79, 0.3);
}
.scope-head { display: flex; justify-content: space-between; align-items: center; font: 600 12px var(--mono); color: var(--dim); margin-bottom: 12px; }
.legend { display: flex; gap: 14px; }
.legend i { display: inline-block; width: 14px; height: 3px; border-radius: 2px; vertical-align: middle; margin-inline-end: 6px; }
.scope svg { width: 100%; height: auto; display: block; border-radius: 12px; background: rgba(0, 0, 0, 0.25); }
.scope .wave { fill: none; stroke-width: 3; stroke-linecap: round; }
.scope .move { animation: slide 4s linear infinite; }
@keyframes slide { from { transform: translateX(0); } to { transform: translateX(-200px); } }
.scope-values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 14px; }
.scope-values div { border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; background: rgba(255, 255, 255, 0.03); }
.scope-values span { display: block; font-size: 11px; color: var(--dim); }
.scope-values b { font: 700 17px var(--mono); }

/* 段階 */
.levels { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; position: relative; }
@media (max-width: 900px) { .levels { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .levels { grid-template-columns: 1fr; } }
.level { border-radius: var(--radius); padding: 24px; background: var(--card); border: 1px solid var(--line); position: relative; }
.level .step { font: 800 13px var(--mono); color: var(--dim); }
.level h3 { margin: 6px 0 10px; font-size: 20px; font-weight: 900; }
.level ul { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.level li { font-size: 12.5px; color: var(--muted); padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line); }
.level .bar { position: absolute; left: 24px; right: 24px; top: 0; height: 2px; border-radius: 2px; }

/* 部品 */
.parts { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
@media (max-width: 960px) { .parts { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 560px) { .parts { grid-template-columns: repeat(3, 1fr); } }
.part {
  border-radius: 16px; padding: 18px 10px 14px; text-align: center; background: var(--card); border: 1px solid var(--line);
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.part:hover { transform: translateY(-3px); border-color: var(--line-strong); background: var(--card-hover); }
.part svg { width: 72px; height: 40px; margin: 0 auto 10px; stroke: #fff; stroke-width: 3; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.part b { display: block; font-size: 14px; font-weight: 700; }
.part .badge { margin-top: 8px; }
.part.is-pro svg { stroke: var(--yellow); }

/* 画面 */
.phones { display: flex; justify-content: center; align-items: flex-end; gap: 28px; flex-wrap: wrap; }
.phone {
  width: 250px; border-radius: 40px; padding: 10px; background: linear-gradient(160deg, #2a3150, #0e1222);
  border: 1px solid var(--line-strong); box-shadow: 0 50px 100px -40px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  transition: transform 0.4s;
}
.phone img { border-radius: 31px; width: 100%; }
.phone:hover { transform: translateY(-6px) rotate(-0.5deg); }
.phone.tall { width: 280px; }
.phone figcaption { text-align: center; color: var(--muted); font-size: 13px; padding: 12px 4px 4px; }
@media (max-width: 640px) { .phone, .phone.tall { width: 74%; } }

/* 料金 */
.pricing { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 880px; margin: 0 auto; }
@media (max-width: 760px) { .pricing { grid-template-columns: 1fr; } }
.price-card { border-radius: 24px; padding: 32px; background: var(--card); border: 1px solid var(--line); }
.price-card.pro {
  background: linear-gradient(180deg, rgba(255, 213, 79, 0.10), rgba(255, 213, 79, 0.02));
  border-color: rgba(255, 213, 79, 0.45); box-shadow: 0 40px 100px -50px rgba(255, 213, 79, 0.6); position: relative;
}
.price-card h3 { margin: 0; font: 800 14px var(--mono); letter-spacing: 0.14em; color: var(--muted); }
.price-card.pro h3 { color: var(--yellow); }
.price { font-size: 46px; font-weight: 900; margin: 6px 0 2px; letter-spacing: -0.02em; }
.price small { font-size: 15px; color: var(--muted); font-weight: 600; margin-inline-start: 6px; }
.price-note { color: var(--dim); font-size: 13px; margin-bottom: 22px; }
.price-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.price-card li { color: var(--muted); padding-inline-start: 26px; position: relative; font-size: 15px; }
.price-card li::before { content: "✓"; position: absolute; inset-inline-start: 0; color: var(--green); font-weight: 800; }
.price-card li.minus::before { content: "–"; color: var(--dim); }
.ribbon { position: absolute; top: 20px; inset-inline-end: 20px; font: 800 11px var(--mono); color: #10131f; background: var(--yellow); padding: 4px 10px; border-radius: 999px; }

/* 言語 */
.langs { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 980px; margin: 0 auto; }
.langs span { font-size: 13px; color: var(--muted); padding: 5px 12px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.02); }

/* CTA */
.cta {
  border-radius: 32px; padding: 64px 32px; text-align: center; position: relative; overflow: hidden;
  background: radial-gradient(ellipse at 50% 0%, rgba(255, 213, 79, 0.18), transparent 60%), linear-gradient(180deg, #111a38, #0a0f22);
  border: 1px solid var(--line-strong);
}
.cta h2 { font-size: clamp(30px, 5vw, 52px); font-weight: 900; margin: 0 0 14px; line-height: 1.15; }
.cta p { color: var(--muted); margin: 0 auto 30px; max-width: 560px; }
.cta .hero-actions { justify-content: center; margin: 0; }

/* フッター */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0 48px; margin-top: 40px; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 18px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin: 0; font-weight: 800; color: var(--text); }
.footer-logo img { width: 26px; height: 26px; border-radius: 7px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; }
.footer-links a { color: var(--muted); font-size: 14px; }
.footer-links a:hover { color: var(--text); }
.footer-note { width: 100%; color: var(--dim); font-size: 13px; margin: 6px 0 0; }

/* 文書ページ (privacy / support) */
.prose { max-width: 820px; margin: 0 auto; padding: 64px 24px 40px; }
@media (max-width: 640px) { .prose { padding: 40px 16px 32px; } }
.prose h1 { font-size: clamp(32px, 5vw, 44px); font-weight: 900; margin: 0 0 6px; letter-spacing: -0.01em; }
.prose h2 { font-size: 21px; font-weight: 800; margin: 48px 0 14px; padding-inline-start: 14px; border-inline-start: 3px solid var(--yellow); line-height: 1.4; }
.prose p, .prose li { color: #c4cce0; }
.prose ul { padding-inline-start: 1.3em; }
.prose li { margin: 6px 0; }
.prose strong { color: var(--text); }
.prose .app-name { color: var(--dim); font: 500 13px var(--mono); margin: 0 0 8px; }
.prose .updated { color: var(--dim); font-size: 14px; margin-top: 40px; }
.prose .prompt { display: none; }
.section-sub { color: var(--dim); font: 600 12px var(--mono); letter-spacing: 0.1em; margin-inline-start: 6px; }
.faq { display: grid; gap: 10px; }
.faq details { border: 1px solid var(--line); border-radius: 16px; background: var(--card); padding: 0 20px; transition: background 0.2s, border-color 0.2s; }
.faq details[open] { background: var(--card-hover); border-color: var(--line-strong); }
.faq summary { cursor: pointer; list-style: none; padding-block: 16px; padding-inline: 0 28px; font-weight: 700; color: var(--text); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; inset-inline-end: 0; top: 12px; font-size: 22px; color: var(--yellow); transition: transform 0.25s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 18px; }
.contact-box { border: 1px solid rgba(255, 213, 79, 0.35); border-radius: 18px; padding: 22px 24px; background: rgba(255, 213, 79, 0.05); }
.contact-box .email { font: 700 20px var(--mono); margin: 0; }

/* 表示アニメーション */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.8s cubic-bezier(.2, .7, .2, 1), transform 0.8s cubic-bezier(.2, .7, .2, 1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.08s; } .reveal.d2 { transition-delay: 0.16s; } .reveal.d3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* 図の中の文字は座標で置いている。右から左の言語 (dir="rtl") でも基準点 (text-anchor) を左始まりのままにする
   (そのままだと start / end が逆になり、「乾電池 ×2」が電池の記号に重なる) */
svg text { direction: ltr; }