:root {
  --violet: #5b3df5;
  --violet-dark: #24156e;
  --coral: #ff6a55;
  --lemon: #ffe66b;
  --ink: #17132b;
  --muted: #6b6785;
  --tint: #f3f1ff;
  --line: #e1dcfb;
  --white: #fff;
  --font-en: "Plus Jakarta Sans", "Helvetica Neue", Arial, sans-serif;
  --font: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --max: 1040px;
  --pad: clamp(18px, 5vw, 48px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--font); color: var(--ink); background: var(--white); line-height: 1.85; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
.sp { display: none; }

/* ---------- ヘッダー ---------- */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 50; display: flex; align-items: center; justify-content: space-between; padding: 14px var(--pad); color: var(--white); transition: background .3s, color .3s, box-shadow .3s; }
.header.scrolled { color: var(--ink); background: rgba(255, 255, 255, .92); backdrop-filter: blur(10px); box-shadow: 0 1px 0 var(--line); }
.logo { font-family: var(--font-en); font-size: 1.3rem; font-weight: 800; letter-spacing: .08em; }
.header-cta { padding: 9px 22px; font-size: .88rem; font-weight: 700; color: var(--white); background: var(--coral); border-radius: 999px; white-space: nowrap; transition: transform .2s; }
.header-cta:hover { transform: scale(1.05); }

/* ---------- ファーストビュー ---------- */
.hero { position: relative; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 40px; align-items: center; padding: clamp(110px, 14vw, 160px) max(var(--pad), calc((100% - 1160px) / 2)) clamp(90px, 11vw, 130px); color: var(--white); background: radial-gradient(circle at 85% 20%, #9a5bff 0, transparent 46%), radial-gradient(circle at 10% 90%, #ff6a55 0, transparent 40%), linear-gradient(135deg, var(--violet-dark), var(--violet)); }
.pill { display: inline-block; padding: 4px 18px; font-size: .84rem; font-weight: 500; background: rgba(255, 255, 255, .16); border: 1px solid rgba(255, 255, 255, .3); border-radius: 999px; }
.hero h1 { margin: 20px 0 22px; font-family: var(--font-en); font-weight: 800; font-size: clamp(2.8rem, 8vw, 5.6rem); line-height: 1.1; letter-spacing: -.02em; }
.hero h1 span { display: block; margin-top: 16px; font-family: var(--font); font-size: clamp(1.2rem, 3.2vw, 2rem); font-weight: 700; line-height: 1.5; letter-spacing: .04em; color: var(--lemon); }
.hero-lead { max-width: 32em; opacity: .92; }
.hero-note { margin-top: 12px; font-size: .8rem; opacity: .8; }

.btn { display: inline-flex; align-items: center; gap: 16px; margin-top: 28px; padding: 18px 34px; font: inherit; font-size: 1.02rem; font-weight: 700; color: var(--white); background: var(--coral); border: 0; border-radius: 999px; box-shadow: 0 14px 30px rgba(255, 106, 85, .45); cursor: pointer; transition: transform .2s, box-shadow .2s; }
.btn i { width: 8px; height: 8px; border-top: 2px solid currentColor; border-right: 2px solid currentColor; transform: rotate(45deg); transition: transform .2s; }
.btn:hover { transform: translateY(-3px); box-shadow: 0 20px 36px rgba(255, 106, 85, .5); }
.btn:hover i { transform: translateX(5px) rotate(45deg); }
.btn-white { margin-top: 0; color: var(--violet); background: var(--white); box-shadow: none; }

.chat { display: grid; gap: 14px; padding: 26px 22px; background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .26); border-radius: 28px; backdrop-filter: blur(8px); }
.bubble { max-width: 88%; padding: 12px 18px; font-family: var(--font-en); font-size: .95rem; font-weight: 500; line-height: 1.5; border-radius: 20px 20px 20px 4px; color: var(--ink); background: var(--white); animation: pop .6s cubic-bezier(.3, 1.4, .5, 1) both; }
.b2 { justify-self: end; color: var(--white); background: var(--violet); border: 1px solid rgba(255, 255, 255, .4); border-radius: 20px 20px 4px 20px; animation-delay: .5s; }
.b3 { background: var(--lemon); animation-delay: 1s; }
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(.9); } }
.chat-tag { justify-self: center; font-size: .78rem; opacity: .85; }

/* ---------- 数字 ---------- */
.stats { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); width: calc(100% - var(--pad) * 2); max-width: var(--max); margin: -54px auto 0; background: var(--white); border-radius: 24px; box-shadow: 0 20px 50px rgba(36, 21, 110, .16); }
.stats > div { padding: 24px 14px; text-align: center; border-left: 1px solid var(--line); }
.stats > div:first-child { border-left: 0; }
.stats dt { font-size: .8rem; color: var(--muted); }
.stats dd { font-family: var(--font-en); font-size: clamp(1.5rem, 4.4vw, 2.6rem); font-weight: 800; color: var(--violet); line-height: 1.3; }

/* ---------- 共通 ---------- */
.section { padding: clamp(64px, 10vw, 120px) var(--pad); }
.section > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.tint { background: var(--tint); }
.dark { color: var(--white); background: var(--ink); }
.eyebrow { font-family: var(--font-en); font-size: .8rem; font-weight: 800; letter-spacing: .24em; color: var(--coral); }
.section h2 { margin-top: 6px; margin-bottom: 40px; font-size: clamp(1.6rem, 4.6vw, 2.8rem); font-weight: 700; line-height: 1.45; }
.mini { margin-top: 22px; font-size: .82rem; color: var(--muted); }

/* ---------- 悩み ---------- */
.problems { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.problems p { position: relative; padding: 28px 24px; font-weight: 700; background: var(--tint); border-radius: 24px 24px 24px 4px; }
.problems p:nth-child(2) { transform: translateY(18px); }

/* ---------- 特長 ---------- */
.features { display: grid; gap: 0; }
.features article { display: grid; grid-template-columns: 90px minmax(0, 300px) minmax(0, 1fr); gap: 10px 30px; align-items: center; padding: 30px 0; border-top: 1px solid rgba(255, 255, 255, .2); }
.features span { font-family: var(--font-en); font-size: 2.6rem; font-weight: 800; line-height: 1; color: transparent; -webkit-text-stroke: 1px var(--lemon); }
.features h3 { font-size: 1.3rem; }
.features p { font-size: .94rem; opacity: .8; }

/* ---------- 料金 ---------- */
.plans { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; align-items: center; }
.plans article { position: relative; padding: 32px 26px; border: 1px solid var(--line); border-radius: 26px; }
.plans .best { padding: 46px 26px; color: var(--white); background: linear-gradient(150deg, var(--violet), #8a5bff); border: 0; box-shadow: 0 24px 50px rgba(91, 61, 245, .35); }
.badge { position: absolute; top: -14px; left: 50%; padding: 3px 18px; font-size: .76rem; font-weight: 700; color: var(--ink); background: var(--lemon); border-radius: 999px; transform: translateX(-50%); white-space: nowrap; }
.plans h3 { font-size: 1.05rem; }
.price { margin: 4px 0 16px; font-family: var(--font-en); font-size: clamp(2rem, 4.4vw, 2.7rem); font-weight: 800; line-height: 1.2; }
.price small { margin-left: 4px; font-family: var(--font); font-size: .8rem; font-weight: 500; }
.plans li { position: relative; padding: 7px 0 7px 26px; font-size: .9rem; border-top: 1px solid var(--line); }
.plans .best li { border-color: rgba(255, 255, 255, .25); }
.plans li::before { content: ""; position: absolute; left: 4px; top: 14px; width: 10px; height: 6px; border-left: 2px solid var(--coral); border-bottom: 2px solid var(--coral); transform: rotate(-45deg); }
.plans .best li::before { border-color: var(--lemon); }

/* ---------- 流れ ---------- */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.steps li { padding: 28px 24px; background: var(--white); border-radius: 24px; }
.steps b { display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 12px; font-family: var(--font-en); color: var(--white); background: var(--violet); border-radius: 14px; }
.steps h3 { font-size: 1.08rem; }
.steps p { font-size: .88rem; color: var(--muted); }

/* ---------- FAQ ---------- */
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { position: relative; padding: 22px 48px 22px 0; font-weight: 700; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 12px; top: 28px; width: 10px; height: 10px; border-right: 2px solid var(--violet); border-bottom: 2px solid var(--violet); transform: rotate(45deg); transition: transform .25s; }
.faq details[open] summary::after { transform: rotate(-135deg); }
.faq details p { padding: 0 48px 22px 0; font-size: .94rem; color: var(--muted); }

/* ---------- 申し込み ---------- */
.trial { width: calc(100% - var(--pad) * 2); max-width: var(--max); margin: 0 auto clamp(64px, 9vw, 110px); padding: clamp(44px, 7vw, 80px) clamp(22px, 5vw, 60px); text-align: center; color: var(--white); background: radial-gradient(circle at 90% 10%, #ff6a55 0, transparent 44%), linear-gradient(135deg, var(--violet-dark), var(--violet)); border-radius: 36px; }
.trial h2 { font-size: clamp(1.6rem, 5vw, 2.8rem); line-height: 1.4; }
.trial form { display: flex; gap: 10px; max-width: 560px; margin: 28px auto 14px; padding: 8px; background: rgba(255, 255, 255, .16); border-radius: 999px; }
.trial input { flex: 1; min-width: 0; padding: 0 20px; font: inherit; color: var(--white); background: none; border: 0; }
.trial input::placeholder { color: rgba(255, 255, 255, .7); }
.trial input:focus { outline: 0; }
.trial .btn { padding: 14px 26px; white-space: nowrap; }
.trial > p { font-size: .78rem; opacity: .8; }

.footer { padding: 22px var(--pad); font-family: var(--font-en); font-size: .76rem; text-align: center; color: var(--muted); border-top: 1px solid var(--line); }

/* ---------- 表示アニメーション ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s cubic-bezier(.2, .8, .2, 1); }
.js [data-reveal].in { opacity: 1; transform: none; }
.js .problems p:nth-child(2)[data-reveal].in { transform: translateY(18px); }

@media (max-width: 860px) {
  .hero { grid-template-columns: minmax(0, 1fr); }
  .problems, .plans, .steps { grid-template-columns: minmax(0, 1fr); }
  .problems p:nth-child(2), .js .problems p:nth-child(2)[data-reveal].in { transform: none; }
  .plans { gap: 28px; }
  .features article { grid-template-columns: 60px minmax(0, 1fr); }
  .features span { font-size: 1.9rem; }
  .features p { grid-column: 2; }
}

@media (max-width: 560px) {
  .sp { display: inline; }
  .stats dt { font-size: .68rem; }
  .btn { width: 100%; justify-content: center; }
  .trial form { flex-direction: column; padding: 0; background: none; }
  .trial input { padding: 16px 20px; background: rgba(255, 255, 255, .16); border-radius: 999px; }
}

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