:root {
  --pink: #e95377;
  --pink-deep: #c83f63;
  --pink-soft: #fff0f4;
  --rose-wash: #fff8fa;
  --green: #4f9c63;
  --green-deep: #37794a;
  --cream: #fffaf2;
  --ink: #3d3135;
  --muted: #706268;
  --line: #f2cbd5;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(164, 66, 92, .13);
  --radius-lg: 30px;
  --radius-md: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--rose-wash);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .7rem 1rem; background: #fff; border: 2px solid var(--pink); border-radius: 10px; }
.skip-link:focus { top: 1rem; }

.site-header {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; line-height: 1.25; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; color: var(--white); background: var(--pink); border-radius: 50% 50% 46% 54%; font-size: 22px; }
.brand strong { display: block; color: var(--pink-deep); font-size: 1rem; letter-spacing: .04em; }
.brand small { display: block; margin-top: 4px; color: var(--muted); font-size: .72rem; }
.header-link { color: var(--pink-deep); font-size: .9rem; font-weight: 700; text-decoration: none; }

.hero {
  position: relative;
  overflow: hidden;
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 690px;
  padding: 68px clamp(28px, 6vw, 82px);
  display: grid;
  grid-template-columns: minmax(0, .96fr) minmax(360px, .78fr);
  align-items: center;
  gap: clamp(38px, 6vw, 90px);
  background:
    radial-gradient(circle at 8% 12%, rgba(255,255,255,.95) 0 3px, transparent 4px),
    radial-gradient(circle at 92% 84%, rgba(255,255,255,.8) 0 4px, transparent 5px),
    linear-gradient(135deg, #fff4f7 0%, #ffe7ee 54%, #fffaf0 100%);
  border: 1px solid rgba(233, 83, 119, .13);
  border-radius: 44px;
}
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; background: rgba(255,255,255,.58); }
.hero::before { width: 310px; height: 310px; right: -145px; top: -110px; }
.hero::after { width: 180px; height: 180px; left: -90px; bottom: -70px; }
.hero-copy, .hero-visual { position: relative; z-index: 1; }
.eyebrow, .kicker { margin: 0 0 13px; color: var(--pink-deep); font-weight: 800; font-size: .86rem; letter-spacing: .12em; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(2.65rem, 5.6vw, 5.2rem); line-height: 1.12; letter-spacing: -.03em; }
h1 span { display: inline-block; margin-bottom: 9px; color: var(--pink-deep); font-family: inherit; font-size: .42em; letter-spacing: .04em; }
.lead { max-width: 37em; margin: 24px 0 25px; color: var(--muted); font-size: 1.05rem; }
.hero-benefits { display: flex; gap: 12px; margin: 0 0 30px; }
.hero-benefits > div { min-width: 150px; padding: 13px 18px; background: rgba(255,255,255,.78); border: 1px solid rgba(233,83,119,.18); border-radius: 18px; box-shadow: 0 10px 25px rgba(164, 66, 92, .08); }
.hero-benefits span { display: block; color: var(--muted); font-size: .76rem; font-weight: 700; }
.hero-benefits strong { display: block; color: var(--green-deep); font-size: 2.1rem; line-height: 1.15; }
.hero-benefits > div:last-child strong { color: var(--pink-deep); }
.hero-benefits small { font-size: .43em; }
.hero-visual { transform: rotate(1.2deg); }
.hero-visual img { width: min(100%, 510px); margin: auto; border-radius: 22px; box-shadow: 0 28px 65px rgba(117, 48, 67, .22); }

.button { min-height: 52px; padding: 13px 24px; display: inline-flex; justify-content: center; align-items: center; gap: 10px; border: 0; border-radius: 999px; font-weight: 800; text-decoration: none; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover, .copy-button:hover { transform: translateY(-2px); }
.button:focus-visible, .copy-button:focus-visible, a:focus-visible { outline: 3px solid #2d84d5; outline-offset: 3px; }
.button-primary { color: #fff; background: linear-gradient(135deg, var(--pink), var(--pink-deep)); box-shadow: 0 12px 28px rgba(200,63,99,.28); }
.button-secondary { color: #fff; background: var(--green-deep); }
.button-ghost { color: var(--pink-deep); background: #fff; border: 1px solid var(--line); }
.microcopy { margin: 9px 0 0 20px; color: var(--muted); font-size: .76rem; }

.section-narrow, .steps, .rewards, .premium, .share, .campaign, .final-cta { width: min(1060px, calc(100% - 40px)); margin-left: auto; margin-right: auto; }
.intro { padding: 110px 0 84px; text-align: center; }
.intro h2, .section-heading h2, .share h2, .campaign h2, .final-cta h2 { margin: 0; font-family: "Yu Mincho", "Hiragino Mincho ProN", serif; font-size: clamp(2rem, 4.3vw, 3.35rem); line-height: 1.35; letter-spacing: -.02em; }
.intro > p:last-child { max-width: 720px; margin: 28px auto 0; color: var(--muted); text-align: left; }
.mobile-only { display: none; }

.steps { padding: 90px clamp(20px, 5vw, 64px); background: #fff; border: 1px solid rgba(233,83,119,.14); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.section-heading { margin-bottom: 42px; text-align: center; }
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step-card { position: relative; min-height: 265px; padding: 34px 25px 26px; text-align: center; background: var(--cream); border-radius: var(--radius-md); }
.step-card:nth-child(2) { background: #f4fbf5; }
.step-card:nth-child(3) { background: var(--pink-soft); }
.step-number { position: absolute; top: 12px; left: 16px; color: rgba(200,63,99,.52); font-size: .76rem; font-weight: 900; letter-spacing: .14em; }
.step-icon { width: 70px; height: 70px; margin: 4px auto 17px; display: grid; place-items: center; color: #fff; background: var(--pink); border-radius: 50%; font-size: 1.55rem; font-weight: 900; }
.step-card:nth-child(2) .step-icon { background: #06c755; font-size: .8rem; }
.step-card:nth-child(3) .step-icon { background: #f2a637; }
.step-card h3 { margin: 0 0 9px; font-size: 1.1rem; }
.step-card p { margin: 0; color: var(--muted); font-size: .91rem; }
.action-panel { max-width: 720px; margin: 32px auto 0; padding: 20px 22px; display: flex; justify-content: space-between; align-items: center; gap: 20px; background: #fff7fa; border: 1px dashed var(--pink); border-radius: 18px; }
.action-label { margin: 0; color: var(--muted); font-size: .78rem; font-weight: 700; }
.message-template { margin: 3px 0 0; color: var(--pink-deep); font-size: 1.15rem; font-weight: 800; }
.copy-button { flex: 0 0 auto; padding: 10px 17px; color: var(--pink-deep); background: #fff; border: 1px solid var(--line); border-radius: 999px; font-weight: 800; cursor: pointer; transition: transform .2s ease; }

.rewards { padding: 118px 0 90px; }
.reward-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.reward-card { position: relative; overflow: hidden; padding: clamp(28px, 5vw, 52px); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.reward-card::after { content: ""; position: absolute; width: 180px; height: 180px; right: -70px; bottom: -75px; background: rgba(255,255,255,.3); border-radius: 50%; }
.new-member { background: linear-gradient(145deg, #eaf7ed, #d9f0df); border: 1px solid #bfdfc7; }
.supporter { background: linear-gradient(145deg, #fff0f4, #ffdce6); border: 1px solid #f3c2cf; }
.reward-for { margin: 0; color: var(--ink); font-weight: 900; }
.reward-card h3 { margin: 6px 0 0; color: var(--muted); font-size: 1rem; }
.reward-rate { display: flex; align-items: center; gap: 9px; margin: 16px 0; color: var(--green-deep); line-height: .85; }
.supporter .reward-rate { color: var(--pink-deep); }
.reward-rate strong { font-family: Georgia, serif; font-size: clamp(5rem, 10vw, 7.5rem); letter-spacing: -.07em; }
.reward-rate span { font-size: 1.35rem; font-weight: 900; line-height: 1; }
.reward-rate span small { display: block; margin-top: 7px; font-size: .72rem; letter-spacing: .04em; white-space: nowrap; }
.reward-card > p:last-child { position: relative; z-index: 1; max-width: 29em; margin: 0; }
.conditions { margin: 28px 0 0; padding: 24px 28px 24px 52px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px 34px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md); color: var(--muted); font-size: .9rem; }
.conditions li::marker { color: var(--pink); }
.exclusion { margin: 16px 4px 0; color: var(--muted); font-size: .82rem; }

.premium {
  position: relative;
  overflow: hidden;
  margin-bottom: 110px;
  padding: clamp(32px, 6vw, 68px);
  display: grid;
  grid-template-columns: minmax(280px, .82fr) 1.18fr;
  align-items: center;
  gap: clamp(32px, 6vw, 72px);
  color: #fff8df;
  background:
    radial-gradient(circle at 14% 18%, rgba(255,220,117,.18), transparent 28%),
    radial-gradient(circle at 92% 84%, rgba(255,83,107,.22), transparent 31%),
    linear-gradient(140deg, #5f0718 0%, #8c0b22 47%, #4b0714 100%);
  border: 1px solid rgba(255,209,89,.62);
  border-radius: var(--radius-lg);
  box-shadow: 0 26px 66px rgba(91,8,28,.3);
}
.premium::before {
  content: "";
  position: absolute;
  inset: 13px;
  border: 1px solid rgba(255,220,139,.28);
  border-radius: 22px;
  pointer-events: none;
}
.premium-visual, .premium-copy { position: relative; z-index: 1; }
.premium-visual img {
  width: min(100%, 430px);
  margin: auto;
  border-radius: 24px;
  box-shadow: 0 24px 55px rgba(34,0,8,.4);
}
.premium .kicker { margin-top: 15px; color: #ffd86f; }
.premium-badge {
  display: inline-block;
  padding: 6px 16px;
  color: #68101e;
  background: linear-gradient(135deg, #fff4b7, #e9b83d);
  border-radius: 999px;
  font-size: .86rem;
  font-weight: 900;
  letter-spacing: .08em;
  box-shadow: 0 8px 20px rgba(22,0,5,.24);
}
.premium h2 {
  margin: 0;
  color: #fff;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2rem, 4.3vw, 3.45rem);
  line-height: 1.32;
  letter-spacing: -.02em;
}
.premium h2 span { color: #ffd96f; }
.premium-lead { margin: 22px 0; color: #fff5ed; }
.premium-coupon {
  margin: 24px 0 20px;
  padding: 20px 24px;
  background: rgba(255,255,255,.09);
  border: 1px solid rgba(255,222,128,.45);
  border-radius: 18px;
  text-align: center;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.14);
}
.premium-coupon p { margin: 0; }
.premium-coupon-name { color: #ffe08a; font-size: 1.05rem; font-weight: 900; letter-spacing: .03em; }
.premium-coupon-rate { margin-top: 3px !important; color: #fff; font-size: 1.15rem; font-weight: 800; }
.premium-coupon-rate strong { color: #ffd45c; font-family: Georgia, serif; font-size: clamp(2.2rem, 6vw, 3.45rem); line-height: 1; }
.premium-coupon-unlimited { margin-top: 7px !important; color: #fff; font-size: .9rem; font-weight: 900; letter-spacing: .08em; }
.premium-detail { margin: 0; color: #f7e9e7; font-size: .92rem; }
.premium-celebration { margin: 18px 0 0; padding-left: 15px; color: #ffe8a4; border-left: 3px solid #f1c84f; font-weight: 800; }
.premium-conditions { margin: 20px 0 0; padding: 17px 18px 17px 38px; color: #ead5d6; background: rgba(34,0,8,.22); border-radius: 14px; font-size: .78rem; }
.premium-conditions li + li { margin-top: 3px; }
.premium-conditions li::marker { color: #ffd45c; }

.share { overflow: hidden; display: grid; grid-template-columns: minmax(280px, .9fr) 1.1fr; align-items: center; background: #fff; border: 1px solid rgba(233,83,119,.15); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.share-image { min-height: 100%; background: var(--pink-soft); }
.share-image img { width: 100%; height: 100%; object-fit: cover; }
.share-copy { padding: clamp(32px, 6vw, 64px); }
.share-intro { margin: 20px 0 22px; color: var(--muted); }
.referral-form { padding: 22px; background: var(--rose-wash); border: 1px solid var(--line); border-radius: 20px; }
.referral-form label { display: block; margin-bottom: 8px; color: var(--ink); font-weight: 900; }
.referral-form label strong { color: var(--pink-deep); }
.referral-form input { width: 100%; min-height: 52px; padding: 12px 15px; color: var(--ink); background: #fff; border: 2px solid #e7c4cd; border-radius: 12px; font: inherit; font-size: 1rem; }
.referral-form input:focus { border-color: var(--green-deep); outline: 3px solid rgba(55,121,74,.17); outline-offset: 2px; }
.referral-form input[aria-invalid="true"] { border-color: #c53245; }
.input-help, .input-error { margin: 6px 2px 0; font-size: .78rem; }
.input-help { color: var(--muted); }
.input-error { color: #b42334; font-weight: 800; }
.line-share-button { width: 100%; margin-top: 17px; color: #fff; background: #06c755; box-shadow: 0 12px 28px rgba(6,199,85,.25); }
.line-share-button:hover { background: #05ad4a; }
.share-preview { margin-top: 22px; }
.share-preview-label { margin: 0 0 8px; color: var(--ink); font-size: .82rem; font-weight: 900; }
.share-preview blockquote { margin: 0; padding: 17px 18px; color: var(--muted); background: #fff; border-left: 4px solid #06c755; border-radius: 0 12px 12px 0; font-size: .84rem; line-height: 1.7; white-space: pre-wrap; }
.share-note { margin: 18px 0 12px; color: var(--muted); font-size: .9rem; }
.share-benefits { padding: 14px 17px; background: #f2fbf5; border: 1px solid #cce9d4; border-radius: 14px; }
.share-benefits p { margin: 0; font-size: .9rem; }
.share-benefits p + p { margin-top: 4px; }
.share-benefits strong { color: var(--pink-deep); }
.share-actions { margin-top: 20px; display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.text-link { color: var(--pink-deep); font-weight: 800; text-underline-offset: 5px; }
.share-device-note { margin: 12px 0 0; color: var(--muted); font-size: .75rem; }

.campaign { margin-top: 110px; margin-bottom: 110px; padding: clamp(32px, 6vw, 68px); display: grid; grid-template-columns: 1fr minmax(280px, .78fr); align-items: center; gap: clamp(30px, 6vw, 70px); background: linear-gradient(135deg, #fff8e8, #fff0f4); border: 1px solid #f1d9b4; border-radius: var(--radius-lg); }
.campaign-badge { display: inline-block; margin-bottom: 16px; padding: 4px 14px; color: #fff; background: var(--pink); border-radius: 999px; font-size: .82rem; font-weight: 900; letter-spacing: .12em; }
.campaign-copy > p:not(.kicker):not(.campaign-note) { margin: 24px 0 12px; color: var(--muted); }
.campaign-note { margin: 0 0 24px; color: var(--muted); font-size: .82rem; }
.campaign-visual img { border-radius: 18px; box-shadow: 0 20px 45px rgba(130,84,45,.16); transform: rotate(1deg); }

.final-cta { margin-bottom: 90px; padding: clamp(30px, 6vw, 65px); display: grid; grid-template-columns: minmax(320px, 430px) 1fr; align-items: center; gap: clamp(28px, 5vw, 60px); color: #fff; background: linear-gradient(135deg, #d94a70, #b73558); border-radius: var(--radius-lg); box-shadow: 0 24px 55px rgba(172,45,82,.27); }
.final-cta .kicker { color: #ffe5ec; }
.final-cta p { margin: 16px 0 22px; }
.supporter-guide { display: block; width: 100%; height: auto; border: 6px solid rgba(255,255,255,.82); border-radius: 20px; box-shadow: 0 18px 38px rgba(92,18,42,.24); }
.final-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.final-cta .button-primary { color: var(--pink-deep); background: #fff; box-shadow: none; }
.final-cta .button-ghost { color: #fff; background: transparent; border-color: rgba(255,255,255,.55); }

footer { width: min(1060px, calc(100% - 40px)); margin: 0 auto; padding: 34px 0 100px; display: flex; justify-content: space-between; gap: 30px; color: var(--muted); border-top: 1px solid var(--line); font-size: .84rem; }
footer strong { color: var(--pink-deep); }
footer p { margin: 5px 0 0; }
.mobile-cta { display: none; }
.toast { position: fixed; z-index: 200; left: 50%; bottom: 28px; transform: translate(-50%, 20px); padding: 11px 18px; color: #fff; background: rgba(61,49,53,.94); border-radius: 999px; opacity: 0; pointer-events: none; transition: .25s ease; font-size: .88rem; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 54px; }
  .hero-copy { text-align: center; }
  .lead { margin-left: auto; margin-right: auto; }
  .hero-benefits { justify-content: center; }
  .microcopy { margin-left: 0; }
  .hero-visual { max-width: 520px; margin: auto; }
  .step-grid { grid-template-columns: 1fr; }
  .step-card { min-height: auto; }
  .reward-grid, .premium, .share, .campaign { grid-template-columns: 1fr; }
  .premium-visual { max-width: 520px; margin: auto; }
  .share-image { max-height: 480px; }
  .share-image img { object-position: center 28%; }
  .campaign-visual { order: -1; max-width: 540px; margin: auto; }
  .final-cta { grid-template-columns: minmax(270px, 340px) 1fr; }
}

@media (max-width: 600px) {
  body { padding-bottom: 72px; }
  .site-header { width: calc(100% - 28px); min-height: 72px; }
  .brand small, .header-link { display: none; }
  .hero { width: calc(100% - 20px); min-height: auto; padding: 42px 20px 26px; border-radius: 28px; }
  h1 { font-size: clamp(2.7rem, 14vw, 4rem); }
  .eyebrow { font-size: .76rem; }
  .lead { font-size: .96rem; }
  .hero-benefits { gap: 8px; }
  .hero-benefits > div { min-width: 0; flex: 1; padding: 11px 10px; }
  .hero-benefits strong { font-size: 1.8rem; }
  .hero-copy > .button { width: 100%; }
  .hero-visual { margin-top: 2px; }
  .section-narrow, .steps, .rewards, .premium, .share, .campaign, .final-cta { width: calc(100% - 24px); }
  .intro { padding: 82px 8px 65px; }
  .mobile-only { display: block; }
  .steps { padding: 58px 16px 24px; }
  .section-heading { margin-bottom: 28px; }
  .action-panel { align-items: stretch; flex-direction: column; text-align: center; }
  .rewards { padding: 85px 0 65px; }
  .reward-card { padding: 30px 24px; }
  .reward-rate strong { font-size: 5.5rem; }
  .conditions { grid-template-columns: 1fr; padding: 22px 22px 22px 43px; }
  .premium { margin-bottom: 82px; padding: 25px 19px 32px; }
  .premium::before { inset: 8px; border-radius: 22px; }
  .premium-copy { text-align: center; }
  .premium h2 { font-size: clamp(2rem, 9.5vw, 2.75rem); }
  .premium-lead, .premium-detail, .premium-conditions { text-align: left; }
  .premium-celebration { text-align: left; }
  .share-image { max-height: none; }
  .share-copy { padding: 34px 22px 40px; }
  .share-actions .button { width: 100%; }
  .campaign { margin-top: 82px; margin-bottom: 82px; padding: 25px 20px 32px; }
  .final-cta { padding: 34px 22px; grid-template-columns: 1fr; text-align: center; }
  .supporter-guide { width: min(100%, 430px); margin: auto; }
  .final-actions { justify-content: center; }
  .final-actions .button { width: 100%; }
  footer { padding-bottom: 30px; flex-direction: column; text-align: center; }
  .mobile-cta { position: fixed; z-index: 150; left: 0; right: 0; bottom: 0; display: block; padding: 9px 12px calc(9px + env(safe-area-inset-bottom)); background: rgba(255,255,255,.94); border-top: 1px solid var(--line); backdrop-filter: blur(12px); }
  .mobile-cta a { min-height: 48px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--pink), var(--pink-deep)); border-radius: 999px; font-weight: 900; text-decoration: none; box-shadow: 0 8px 20px rgba(200,63,99,.25); }
  .toast { bottom: 82px; }
}

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