/* =========================================================
   Native Camp 商務英語 LP  —  static build
   1. tokens / base
   2. layout & components（元デザインを踏襲）
   3. motion layer（スクロール演出・ホバー演出）
   4. responsive
   5. reduced motion
   ========================================================= */

/* ---------- 1. tokens / base ---------- */
:root {
  --background: #f7f8fa;
  --foreground: #082846;
  --navy: #082846;
  --navy-deep: #071f37;
  --navy-ink: #061a2e;
  --orange: #f5820b;
  --orange-light: #ff982b;
  --orange-soft: #fff0dc;
  --ink-soft: #647587;
  --line: #dce3e9;
  --ease: cubic-bezier(.22, .8, .2, 1);
}

@property --ps { syntax: "<number>"; inherits: false; initial-value: 1.1; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
h1, h2, h3 { letter-spacing: -.035em; }

.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.ic { display: block; flex: none; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.shell { width: min(1160px, calc(100% - 48px)); margin-inline: auto; }
.section-pad { padding: 112px 0; }

.section-kicker {
  display: inline-flex; align-items: center; gap: 9px;
  margin: 0; color: var(--orange);
  font: 800 12px/1.3 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .14em;
}
.section-kicker::before { content: ""; width: 26px; height: 2px; background: var(--orange); }
.section-heading h2, .center-heading h2, .why-header h2, .rhythm-copy h2 {
  margin: 16px 0 18px; font-size: clamp(34px, 4vw, 56px); line-height: 1.22; font-weight: 900;
}
.section-lead { max-width: 470px; margin: 0; color: var(--ink-soft); font-size: 17px; }

/* ---------- 2. layout & components ---------- */

/* --- scroll progress --- */
.scroll-progress { position: fixed; z-index: 60; top: 0; left: 0; width: 100%; height: 3px; pointer-events: none; }
.scroll-progress span {
  display: block; width: 100%; height: 100%;
  transform: scaleX(0); transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--orange), #ffc36e 48%, #4aa8ff);
}

/* --- header --- */
.site-header {
  position: sticky; top: 0; z-index: 30; height: 80px;
  background: rgba(255, 255, 255, .97);
  border-bottom: 1px solid rgba(8, 40, 70, .1);
  transition: height .35s var(--ease), background .35s ease, box-shadow .35s ease, backdrop-filter .35s ease;
}
.site-header.is-stuck {
  height: 66px;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 10px 30px rgba(8, 40, 70, .1);
}
.site-header__inner { height: 100%; display: flex; align-items: center; gap: 34px; }
.brand { flex: 0 0 auto; width: 205px; line-height: 0; transition: width .35s var(--ease), transform .3s var(--ease); }
.site-header.is-stuck .brand { width: 180px; }
.brand:hover { transform: translateY(-1px); }
.brand img { width: 100%; }

.header-nav { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.header-nav a {
  position: relative; padding-bottom: 4px;
  font-size: 14px; font-weight: 700; color: #40566b;
  transition: color .25s ease;
}
.header-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--orange); transform: scaleX(0); transform-origin: right;
  transition: transform .35s var(--ease);
}
.header-nav a:hover { color: var(--orange); }
.header-nav a:hover::after { transform: scaleX(1); transform-origin: left; }

.header-cta {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; background: var(--navy); color: #fff;
  font-size: 14px; font-weight: 800;
  transition: transform .25s var(--ease), background .25s ease, box-shadow .25s ease;
}
.header-cta::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, .32) 50%, transparent 80%);
  transform: translateX(-120%);
}
.header-cta:hover { transform: translateY(-2px); background: #0d3a63; box-shadow: 0 12px 24px rgba(8, 40, 70, .26); }
.header-cta:hover::after { animation: shine .9s var(--ease); }
.header-cta .ic { transition: transform .25s var(--ease); }
.header-cta:hover .ic { transform: translateX(3px); }

/* --- CTA button --- */
.cta-button {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: space-between; gap: 26px;
  min-width: 250px; padding: 17px 20px 17px 28px;
  background: var(--orange); color: #fff;
  font-size: 17px; font-weight: 900; letter-spacing: .01em;
  box-shadow: 0 12px 34px rgba(245, 130, 11, .3);
  transition: transform .28s var(--ease), box-shadow .28s ease, background .28s ease;
}
.cta-button > span { position: relative; z-index: 1; }
.cta-button::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(100deg, var(--orange-light), #ffb057);
  opacity: 0; transition: opacity .3s ease;
}
.cta-button::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, .38) 50%, transparent 80%);
  transform: translateX(-120%);
}
.cta-button:hover { transform: translateY(-3px); box-shadow: 0 20px 44px rgba(245, 130, 11, .4); }
.cta-button:hover::before { opacity: 1; }
.cta-button:hover::after { animation: shine 1s var(--ease); }
.cta-button:active { transform: translateY(-1px); }
.cta-button__icon {
  position: relative; z-index: 1;
  display: grid; place-items: center; width: 30px; height: 30px;
  background: rgba(255, 255, 255, .18);
  transition: transform .28s var(--ease), background .28s ease;
}
.cta-button:hover .cta-button__icon { transform: translateX(5px); background: rgba(255, 255, 255, .3); }
.cta-button--dark { background: var(--navy); box-shadow: 0 15px 40px rgba(8, 40, 70, .28); }
.cta-button--dark::before { background: linear-gradient(100deg, #113f68, #1a5a92); }
.cta-button--dark:hover { box-shadow: 0 22px 50px rgba(8, 40, 70, .38); }

/* --- hero --- */
.hero {
  position: relative; min-height: 690px; display: flex; align-items: stretch;
  overflow: hidden; background: var(--navy-deep); color: #fff;
}
.hero__photo {
  position: absolute; inset: 0 0 0 43%;
  background: url('../assets/hero-business.webp') 55% center / cover no-repeat;
  transform: translate3d(0, var(--py, 0px), 0) scale(var(--ps, 1));
  transition: --ps 2s var(--ease);
  will-change: transform;
}
.hero.is-ready .hero__photo { --ps: 1; }
.hero__veil {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, var(--navy-deep) 0%, var(--navy-deep) 38%, rgba(7, 31, 55, .88) 52%, rgba(7, 31, 55, .08) 82%),
    linear-gradient(0deg, rgba(7, 31, 55, .38), transparent 55%);
}
.hero__grid {
  position: absolute; inset: 0; opacity: .5;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: linear-gradient(90deg, #000 0%, #000 42%, transparent 66%);
  -webkit-mask-image: linear-gradient(90deg, #000 0%, #000 42%, transparent 66%);
}
.hero__inner { position: relative; z-index: 2; padding: 82px 0 132px; }
.hero__copy { max-width: 760px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 9px; margin: 0;
  color: #ffad4c; font-size: 14px; font-weight: 800; letter-spacing: .13em;
}
.hero h1 { margin: 20px 0 18px; font-size: clamp(42px, 5.25vw, 76px); line-height: 1.13; font-weight: 900; }
.underline-sweep { position: relative; display: inline-block; color: #ff901d; }
.underline-sweep::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -.1em; height: .09em;
  background: linear-gradient(90deg, var(--orange), #ffcf8a);
  transform: scaleX(0); transform-origin: left;
  animation: sweep 1.1s var(--ease) 1.25s forwards;
}
.hero__lead { margin: 0 0 16px; max-width: 580px; font-size: clamp(20px, 2vw, 28px); line-height: 1.55; font-weight: 800; }
.hero__detail { max-width: 555px; margin: 0; color: rgba(255, 255, 255, .78); font-size: 17px; line-height: 1.8; }
.hero__actions { display: flex; align-items: center; gap: 20px; margin-top: 34px; }
.trial-note { display: inline-flex; align-items: center; gap: 7px; color: rgba(255, 255, 255, .84); font-size: 14px; }
.trial-note .ic { color: #2bd18b; }

.scenario-tags { display: flex; gap: 22px; margin-top: 36px; }
.scenario-tags span {
  padding-left: 12px; border-left: 2px solid var(--orange);
  font: 700 11px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .13em; color: rgba(255, 255, 255, .64);
}

/* teacher call card */
.teacher-call {
  position: absolute; z-index: 4; left: calc(50% + 132px); top: 92px; width: 210px;
  overflow: hidden; background: #fff; color: var(--navy);
  border: 1px solid rgba(255, 255, 255, .68); border-radius: 12px;
  box-shadow: 0 18px 46px rgba(0, 0, 0, .3);
  transform: rotate(-1deg);
  animation: cardFloat 6s ease-in-out 1.6s infinite;
}
.teacher-call__video { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #cbd5df; }
.teacher-call__video img { width: 100%; height: 100%; object-fit: cover; }
.teacher-call__live {
  position: absolute; top: 10px; left: 10px;
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 8px;
  background: rgba(7, 31, 55, .86); color: #fff; border-radius: 999px;
  font: 800 9px/1 ui-monospace, monospace; letter-spacing: .1em;
  backdrop-filter: blur(5px);
}
.teacher-call__live i { width: 7px; height: 7px; border-radius: 50%; background: #2bd18b; animation: livePulse 1.6s ease-in-out infinite; }
.teacher-call__meta { display: flex; align-items: center; gap: 10px; padding: 10px 12px 11px; }
.teacher-call__meta > div { display: flex; min-width: 0; flex-direction: column; }
.teacher-call__meta b { font-size: 9px; line-height: 1.35; letter-spacing: .08em; }
.teacher-call__meta small { color: #66798c; font-size: 10px; white-space: nowrap; }
.sound-bars { display: flex; align-items: flex-end; gap: 3px; margin-left: auto; height: 20px; }
.sound-bars i { width: 3px; background: var(--orange); animation: soundPulse 1s ease-in-out infinite; }
.sound-bars i:nth-child(1) { height: 8px; }
.sound-bars i:nth-child(2) { height: 17px; animation-delay: .1s; }
.sound-bars i:nth-child(3) { height: 12px; animation-delay: .2s; }
.sound-bars i:nth-child(4) { height: 6px; animation-delay: .3s; }

.hero__scroll-hint {
  position: absolute; z-index: 3; left: max(24px, calc(50% - 580px)); bottom: 0;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.hero__scroll-hint b {
  writing-mode: vertical-rl;
  font: 800 9px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .24em; color: rgba(255, 255, 255, .5);
}
.hero__scroll-hint span { position: relative; display: block; width: 1px; height: 54px; background: rgba(255, 255, 255, .22); overflow: hidden; }
.hero__scroll-hint i { position: absolute; left: 0; width: 100%; height: 20px; background: var(--orange); animation: scrollHint 2.4s var(--ease) infinite; }

/* --- pain --- */
.pain { background: #fff; }
.pain__grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: center; }
.quote-stack { position: relative; padding: 15px 0; }
.quote-stack__ring {
  position: absolute; top: -28px; right: -20px; width: 120px; height: 120px;
  border: 1px solid #ffd7a8; border-radius: 50%;
  animation: drift 9s ease-in-out infinite;
}
.quote-card {
  position: relative; z-index: 1; max-width: 480px; padding: 21px 24px;
  background: #eff3f6; border-left: 4px solid var(--navy);
  transition: transform .3s var(--ease), box-shadow .3s ease;
}
.quote-card:hover { transform: translateY(-3px); box-shadow: 0 16px 36px rgba(8, 40, 70, .12); }
.quote-card--right { margin-left: auto; background: var(--orange-soft); border-left-color: var(--orange); }
.quote-card span { color: #6a7b8c; font-size: 13px; font-weight: 700; }
.quote-card p { margin: 4px 0 0; font-size: 21px; font-weight: 800; }

.thinking-line { position: relative; z-index: 2; display: flex; align-items: center; gap: 12px; padding: 13px 8%; color: #8795a3; font-size: 13px; }
.thinking-line > span { color: var(--orange); font-weight: 900; white-space: nowrap; }
.thinking-line > span b { font: inherit; }
.thinking-line i { flex: 1; height: 1px; background: repeating-linear-gradient(90deg, #bdc7d0 0 5px, transparent 5px 10px); }
.thinking-line__text { font-weight: 600; white-space: nowrap; }
.thinking-line.is-in .thinking-line__text { animation: blinkSoft 1.4s ease-in-out 3; }

.after-note { margin: 20px 18px 0 auto; width: max-content; max-width: 100%; color: #68798b; font-size: 14px; }
.after-note b { color: var(--navy); }

/* --- real talk --- */
.real-talk { position: relative; padding: 124px 0; overflow: hidden; background: var(--navy); color: #fff; }
.real-talk__orbit {
  position: absolute; right: -160px; top: 50%; width: 430px; height: 430px;
  border: 80px solid rgba(245, 130, 11, .12); border-radius: 50%;
  transform: translateY(-50%);
  animation: orbitSpin 26s linear infinite;
}
.real-talk__grid { position: relative; z-index: 1; display: grid; grid-template-columns: 280px 1fr; gap: 90px; align-items: center; }
.real-label { padding: 20px 0 20px 34px; border-left: 7px solid var(--orange); }
.real-label span { display: block; font: 800 14px/1.2 ui-monospace, monospace; letter-spacing: .35em; color: #f7a341; }
.real-label strong { display: block; margin-top: 5px; font-size: 62px; line-height: .95; letter-spacing: -.06em; }
.real-copy h2 { margin: 0 0 20px; font-size: clamp(34px, 4vw, 56px); line-height: 1.23; font-weight: 900; }
.real-copy .hl { position: relative; display: inline-block; color: var(--orange-light); }
.real-copy .hl::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -.06em; height: .09em;
  background: linear-gradient(90deg, var(--orange), #ffcf8a);
  transform: scaleX(0); transform-origin: left;
  transition: transform .8s var(--ease) .2s;
}
.real-copy h2.is-in .hl::after { transform: scaleX(1); }
.real-copy > p { max-width: 750px; color: rgba(255, 255, 255, .74); font-size: 17px; }

.formula { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 18px; align-items: center; margin: 38px 0; }
.formula > div {
  display: flex; align-items: center; gap: 14px; padding: 20px 18px;
  border-top: 1px solid rgba(255, 255, 255, .28);
  border-bottom: 1px solid rgba(255, 255, 255, .15);
  transition: background .3s ease, transform .3s var(--ease);
}
.formula > div:hover { background: rgba(255, 255, 255, .05); transform: translateY(-3px); }
.formula .ic { color: var(--orange-light); }
.formula span { font-size: 13px; line-height: 1.45; color: rgba(255, 255, 255, .65); }
.formula b { font-size: 16px; color: #fff; }
.formula > i { font-style: normal; color: var(--orange); font-size: 22px; text-align: center; }
.real-conclusion { color: #fff !important; font-weight: 800; font-size: 19px; }

/* --- benefits --- */
.benefits { background: #f4f6f8; }
.center-heading { text-align: center; }
.center-heading h2 { max-width: 760px; margin-left: auto; margin-right: auto; }
.outcome-list { margin-top: 60px; border-top: 1px solid #cfd8e0; }
.outcome-item {
  position: relative; display: grid; grid-template-columns: 58px 52px 1fr; gap: 24px; align-items: center;
  padding: 27px 10px; border-bottom: 1px solid #cfd8e0;
  transition: background .3s ease, padding .3s var(--ease);
}
.outcome-item::before {
  content: ""; position: absolute; left: 0; top: -1px; bottom: -1px; width: 3px;
  background: var(--orange); transform: scaleY(0); transform-origin: top;
  transition: transform .35s var(--ease);
}
.outcome-item:hover { background: #fff; padding-left: 24px; padding-right: 24px; }
.outcome-item:hover::before { transform: scaleY(1); }
.outcome-item__no { color: #a4b0bb; font: 700 12px/1 ui-monospace, monospace; }
.outcome-item__icon {
  display: grid; place-items: center; width: 48px; height: 48px;
  background: var(--navy); color: #fff;
  transition: background .3s ease, transform .35s var(--ease);
}
.outcome-item:hover .outcome-item__icon { background: var(--orange); transform: rotate(-6deg) scale(1.06); }
.outcome-item h3 { margin: 0 0 3px; font-size: 20px; }
.outcome-item p { margin: 0; color: #697a8b; font-size: 15px; }

/* --- why --- */
.why-section { background: #fff; }
.why-header { display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; align-items: end; }
.why-header > p { margin: 0 0 25px; color: var(--ink-soft); font-size: 17px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 58px; }
.feature-card {
  position: relative; padding: 34px 34px 38px; background: #fff; border: 1px solid #dfe5eb;
  transition: transform .35s var(--ease), box-shadow .35s ease, z-index 0s;
}
.feature-card + .feature-card { border-left: none; }
.feature-card:hover { z-index: 2; transform: translateY(-8px); box-shadow: 0 26px 54px rgba(8, 40, 70, .13); }
.feature-card--dark { transform: translateY(22px); background: var(--navy); color: #fff; border-color: var(--navy); }
.feature-card--dark:hover { transform: translateY(14px); box-shadow: 0 30px 60px rgba(8, 40, 70, .35); }
.feature-card__top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 26px; border-bottom: 1px solid #dfe5eb; }
.feature-card--dark .feature-card__top { border-color: rgba(255, 255, 255, .2); }
.feature-card__top span { color: #abb6c1; font: 800 12px/1 ui-monospace, monospace; }
.feature-card__top .ic { color: var(--orange); transition: transform .4s var(--ease); }
.feature-card:hover .feature-card__top .ic { transform: rotate(-8deg) scale(1.12); }
.feature-card__lead { margin: 24px 0 3px; color: var(--orange); font-size: 13px; font-weight: 900; letter-spacing: .06em; }
.feature-card--dark .feature-card__lead { color: #ff9d37; }
.feature-card h3 { margin: 0 0 14px; font-size: 25px; }
.feature-card > p:last-child { margin: 0; color: var(--ink-soft); font-size: 15px; }
.feature-card--dark > p:last-child { color: rgba(255, 255, 255, .7); }
@media (min-width: 901px) {
  .feature-card--dark + .feature-card::before { content: ""; position: absolute; top: 0; left: -1px; width: 1px; height: 22px; background: #dfe5eb; }
}

/* --- rhythm --- */
.rhythm-section { padding: 130px 0 120px; background: linear-gradient(90deg, #ecf0f4 0%, #ecf0f4 50%, #f9fafb 50%); }
.rhythm__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.rhythm-photo { position: relative; overflow: hidden; box-shadow: -25px 25px 0 var(--orange); }
.rhythm-photo img { width: 100%; height: 100%; min-height: 560px; object-fit: cover; }
.rhythm-photo__caption {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 5; margin: 0;
  padding: 18px 22px; background: rgba(7, 31, 55, .91); color: #fff; font-size: 14px;
}
.rhythm-photo__caption span { margin-right: 12px; color: #ff9d37; font: 800 12px ui-monospace, monospace; }
.rhythm-copy h2 { font-size: clamp(32px, 3.5vw, 49px); }
.schedule { margin-top: 36px; border-top: 1px solid #cad4dd; }
.schedule__row {
  display: grid; grid-template-columns: 84px 1fr; gap: 24px;
  padding: 18px 0; border-bottom: 1px solid #cad4dd;
  transition: padding-left .3s var(--ease);
}
.schedule__row:hover { padding-left: 10px; }
.schedule__row time { color: var(--orange); font: 800 17px/1.6 ui-monospace, monospace; }
.schedule__row div { display: flex; flex-direction: column; }
.schedule__row b { font-size: 16px; }
.schedule__row span { color: #6e7e8d; font-size: 14px; }
.rhythm-note { margin-top: 25px; padding-left: 15px; border-left: 3px solid var(--orange); font-weight: 800; }

/* --- final CTA --- */
.final-cta {
  position: relative; padding: 112px 20px 104px; overflow: hidden;
  background: var(--orange); color: #fff; text-align: center;
}
.final-cta__glow {
  position: absolute; inset: 0; opacity: 0; transition: opacity .4s ease;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, .22), transparent 65%);
}
.final-cta:hover .final-cta__glow { opacity: 1; }
.final-cta__orbit { position: absolute; border: 1px solid rgba(255, 255, 255, .3); border-radius: 50%; }
.final-cta__orbit--one { width: 500px; height: 500px; top: -330px; left: -80px; animation: drift 14s ease-in-out infinite; }
.final-cta__orbit--two { width: 600px; height: 600px; right: -250px; bottom: -410px; border-width: 100px; border-color: rgba(255, 255, 255, .09); animation: drift 18s ease-in-out infinite reverse; }
.final-cta__inner { position: relative; z-index: 2; max-width: 850px; margin: 0 auto; }
.final-cta__logo { width: 205px; margin: 0 auto 25px; }
.final-cta__eyebrow { margin: 0 0 14px; font: 800 12px/1.4 ui-monospace, monospace; letter-spacing: .16em; }
.final-cta h2 { margin: 0 0 15px; font-size: clamp(36px, 5vw, 66px); line-height: 1.2; letter-spacing: -.04em; font-weight: 900; }
.final-cta__lead { margin: 0 0 30px; font-size: 19px; }
.final-cta__offer {
  display: inline-flex; align-items: center; gap: 26px; margin-bottom: 34px;
  padding: 16px 30px; background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .3);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.final-cta__offer > div { display: flex; flex-direction: column; line-height: 1.15; }
.final-cta__offer strong { font-size: 34px; font-weight: 900; letter-spacing: -.03em; }
.final-cta__offer span { font-size: 12px; opacity: .85; }
.final-cta__offer i { width: 1px; height: 34px; background: rgba(255, 255, 255, .35); }
.final-cta__note { display: block; margin: 18px 0 0; color: rgba(255, 255, 255, .78); font-size: 12px; }

/* --- footer --- */
.site-footer { background: var(--navy-ink); color: rgba(255, 255, 255, .58); font-size: 12px; }
.site-footer__inner { padding: 25px 0; display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.site-footer__inner a { display: inline-flex; align-items: center; gap: 7px; color: rgba(255, 255, 255, .84); transition: color .25s ease; }
.site-footer__inner a:hover { color: var(--orange-light); }
.site-footer__inner a .ic { transition: transform .25s var(--ease); }
.site-footer__inner a:hover .ic { transform: translateX(3px); }

/* --- fixed mobile CTA / to top --- */
.mobile-cta {
  position: fixed; z-index: 50; left: 0; right: 0; bottom: 0; display: none;
  align-items: center; justify-content: space-between; gap: 12px;
  height: 70px; padding: 10px 14px;
  background: #fff; box-shadow: 0 -5px 30px rgba(8, 40, 70, .16);
  transform: translateY(120%); transition: transform .45s var(--ease);
}
.mobile-cta.is-shown { transform: translateY(0); }
.mobile-cta__copy { display: flex; flex-direction: column; line-height: 1.25; }
.mobile-cta__copy b { font-size: 14px; }
.mobile-cta__copy span { color: #728292; font-size: 10px; }
.mobile-cta a {
  display: inline-flex; align-items: center; gap: 7px; padding: 13px 16px;
  background: var(--orange); color: #fff; font-size: 13px; font-weight: 900; white-space: nowrap;
  box-shadow: 0 8px 18px rgba(245, 130, 11, .32);
}

.to-top {
  position: fixed; z-index: 45; right: 22px; bottom: 22px;
  display: grid; place-items: center; width: 46px; height: 46px;
  background: var(--navy); color: #fff; border-radius: 50%;
  box-shadow: 0 12px 26px rgba(8, 40, 70, .3);
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: opacity .35s ease, transform .35s var(--ease), visibility .35s, background .25s ease;
}
.to-top.is-shown { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--orange); }

/* ---------- 3. motion layer ---------- */
[data-reveal] {
  opacity: 0; transform: translate3d(0, 28px, 0);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: var(--rd, 0ms);
}
[data-reveal][data-reveal-type="left"] { transform: translate3d(-38px, 0, 0); }
[data-reveal][data-reveal-type="right"] { transform: translate3d(38px, 0, 0); }
[data-reveal][data-reveal-type="clip"] { opacity: 1; transform: none; isolation: isolate; }
[data-reveal][data-reveal-type="clip"]::before {
  content: ""; position: absolute; z-index: 4; inset: 0; background: #ecf0f4;
  transform: scaleY(1); transform-origin: 50% 100%;
  transition: transform 1.1s cubic-bezier(.65, 0, .35, 1);
}
[data-reveal][data-reveal-type="clip"] img { transform: scale(1.16); transition: transform 1.8s var(--ease); }
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal][data-reveal-type="clip"].is-in::before { transform: scaleY(0); }
[data-reveal][data-reveal-type="clip"].is-in img { transform: scale(1); }

/* 引用スタックは要素同士が密着しているため、移動なしのフェードのみで表示する
   （移動させると先に現れたカードが隣の行を覆ってしまう） */
.quote-stack [data-reveal],
.quote-stack [data-reveal][data-reveal-type="left"],
.quote-stack [data-reveal][data-reveal-type="right"] { transform: none; }

.is-intro > * { opacity: 0; transform: translate3d(0, 26px, 0); animation: introUp .95s var(--ease) forwards; animation-delay: calc(var(--i, 0) * 110ms + 180ms); }

@keyframes introUp { to { opacity: 1; transform: none; } }
@keyframes shine { 0% { transform: translateX(-120%); } 100% { transform: translateX(120%); } }
@keyframes sweep { to { transform: scaleX(1); } }
@keyframes soundPulse { 50% { transform: scaleY(.45); opacity: .55; } }
@keyframes livePulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(43, 209, 139, .55); } 70% { box-shadow: 0 0 0 6px rgba(43, 209, 139, 0); } }
@keyframes cardFloat { 0%, 100% { transform: rotate(-1deg) translateY(0); } 50% { transform: rotate(-.2deg) translateY(-10px); } }
@keyframes drift { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(26px, -20px); } }
@keyframes orbitSpin { from { transform: translateY(-50%) rotate(0); } to { transform: translateY(-50%) rotate(360deg); } }
@keyframes scrollHint { 0% { top: -20px; opacity: 0; } 25% { opacity: 1; } 75% { opacity: 1; } 100% { top: 54px; opacity: 0; } }
@keyframes blinkSoft { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

/* ---------- 4. responsive ---------- */
@media (max-width: 900px) {
  .section-pad { padding: 88px 0; }
  .header-nav { display: none; }
  .header-cta { margin-left: auto; }

  .hero { min-height: 780px; align-items: flex-end; }
  .hero__photo { inset: 0; background-position: 64% center; }
  .hero__veil { background: linear-gradient(0deg, var(--navy-deep) 0%, rgba(7, 31, 55, .96) 48%, rgba(7, 31, 55, .15) 100%); }
  .hero__grid { mask-image: linear-gradient(0deg, #000 0%, transparent 70%); -webkit-mask-image: linear-gradient(0deg, #000 0%, transparent 70%); }
  .hero__inner { padding-top: 300px; }
  .teacher-call { top: 22px; left: 24px; width: 172px; animation: none; transform: none; }
  .hero__scroll-hint { display: none; }

  .pain__grid, .real-talk__grid, .why-header, .rhythm__grid { grid-template-columns: 1fr; gap: 52px; }
  .real-label { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card + .feature-card { border-left: 1px solid #dfe5eb; border-top: none; }
  .feature-card--dark, .feature-card--dark:hover { transform: none; }
  .feature-card:hover { transform: translateY(-4px); }
  .rhythm-section { padding: 96px 0 88px; background: #f4f6f8; }
  .rhythm-photo img { min-height: 500px; }
}

@media (max-width: 640px) {
  body { padding-bottom: 70px; }
  .shell { width: calc(100% - 32px); }
  .section-pad { padding: 78px 0; }
  .site-header { height: 66px; }
  .brand, .site-header.is-stuck .brand { width: 168px; }
  .header-cta { display: none; }

  .hero { min-height: 790px; }
  .hero__photo { inset: 0 0 auto 0; height: 390px; background-position: 66% center; }
  .hero__veil { background: linear-gradient(0deg, var(--navy-deep) 0%, var(--navy-deep) 53%, rgba(7, 31, 55, .28) 100%); }
  .hero__inner { padding: 360px 0 46px; }
  .eyebrow { font-size: 11px; }
  .hero h1 { margin-top: 13px; font-size: 36px; }
  .hero__lead { font-size: 19px; }
  .hero__detail { font-size: 15px; }
  .hero__actions { flex-direction: column; align-items: stretch; gap: 12px; margin-top: 24px; }
  .cta-button { width: 100%; min-width: 0; }
  .trial-note { justify-content: center; }
  .scenario-tags { gap: 13px; margin-top: 24px; }
  .scenario-tags span { font-size: 9px; }
  .teacher-call { top: 18px; left: 16px; width: 142px; }
  .teacher-call__live { top: 7px; left: 7px; padding: 4px 6px; font-size: 8px; }
  .teacher-call__meta { padding: 7px 8px 8px; }
  .teacher-call__meta b { font-size: 8px; }
  .teacher-call__meta small { font-size: 9px; }
  .teacher-call__meta { gap: 6px; }
  .sound-bars { height: 16px; gap: 2px; }
  .sound-bars i { width: 2px; }
  .sound-bars i:nth-child(1) { height: 6px; }
  .sound-bars i:nth-child(2) { height: 14px; }
  .sound-bars i:nth-child(3) { height: 10px; }
  .sound-bars i:nth-child(4) { height: 5px; }

  .section-heading h2, .center-heading h2, .why-header h2, .rhythm-copy h2 { font-size: 32px; }
  .pain__grid { gap: 38px; }
  .quote-card p { font-size: 17px; }
  .thinking-line { padding-left: 0; padding-right: 0; }
  .real-talk { padding: 84px 0; }
  .real-talk__grid { gap: 0; }
  .real-copy h2 { font-size: 32px; }
  .formula { grid-template-columns: 1fr; gap: 0; }
  .formula > i { height: 26px; line-height: 26px; }
  .outcome-list { margin-top: 40px; }
  .outcome-item { grid-template-columns: 40px 1fr; gap: 14px; align-items: start; }
  .outcome-item__no { display: none; }
  .outcome-item__icon { width: 40px; height: 40px; }
  .outcome-item h3 { font-size: 17px; }
  .outcome-item p { font-size: 14px; }
  .why-header { gap: 12px; }
  .feature-grid { margin-top: 32px; }
  .feature-card { padding: 28px 25px 30px; }
  .rhythm-section { padding: 84px 0 76px; }
  .rhythm__grid { gap: 54px; }
  .rhythm-photo { box-shadow: -12px 12px 0 var(--orange); }
  .rhythm-photo img { min-height: 400px; }
  .schedule__row { grid-template-columns: 66px 1fr; gap: 12px; }
  /* 横方向のリビールは狭い画面で横あふれの原因になるため縦方向に統一 */
  [data-reveal][data-reveal-type="left"], [data-reveal][data-reveal-type="right"] { transform: translate3d(0, 24px, 0); }
  .quote-stack__ring { right: 0; width: 92px; height: 92px; }

  .final-cta { padding: 84px 18px 78px; }
  .final-cta__logo { width: 175px; }
  .final-cta h2 { font-size: 34px; }
  .final-cta__lead { font-size: 16px; }
  .final-cta__offer { gap: 16px; padding: 14px 18px; }
  .final-cta__offer strong { font-size: 26px; }
  .site-footer__inner { padding: 25px 0 30px; flex-direction: column; text-align: center; gap: 8px; }
  .mobile-cta { display: flex; }
  .to-top { display: none; }
}

/* ---------- 5. reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  [data-reveal], .is-intro > * { opacity: 1 !important; transform: none !important; }
  [data-reveal][data-reveal-type="clip"]::before { transform: scaleY(0) !important; }
  [data-reveal][data-reveal-type="clip"] img { transform: none !important; }
  .underline-sweep::after, .real-copy h2 .hl::after { transform: scaleX(1) !important; }
  .hero__photo { --ps: 1; }
  .mobile-cta.is-shown { transform: translateY(0) !important; }
}