:root {
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: rgba(17, 24, 39, .12);
  --accent: #fbbf24;
  /* yellow */
  --accent2: #f59e0b;
  /* deep yellow */

  --radius: 18px;
  --shadow: 0 10px 28px rgba(17, 24, 39, .06);

  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  /* sticky header 対策 */
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  background:
    /* radial-gradient(1000px 600px at 10% 0%, rgba(251,191,36,.22), transparent 60%),
    radial-gradient(900px 520px at 90% 20%, rgba(245,158,11,.16), transparent 60%), */
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--accent2);
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin-inline: auto;
}

.section {
  padding: 84px 0;
}

.center {
  text-align: center;
}

.muted {
  color: var(--muted);
}

.kicker {
  display: inline-block;
  font-weight: 700;
  letter-spacing: .08em;
  color: rgba(17, 24, 39, .75);
  margin: 0 0 12px;
}

/* header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, .72);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: .06em;
}

.brand__mark {
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 10px 25px rgba(245, 158, 11, .18);
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav a {
  color: rgba(17, 24, 39, .85);
  font-weight: 800;
  font-size: 14px;
  padding: 10px 10px;
  border-radius: 10px;
}

.nav a:hover {
  background: rgba(251, 191, 36, .16);
}

.navToggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, .7);
  color: var(--text);
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}

.navToggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: rgba(17, 24, 39, .85);
  border-radius: 2px;
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 900;
  border: 1px solid rgba(245, 158, 11, .35);
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #1f2937;
  box-shadow: 0 14px 40px rgba(245, 158, 11, .20);
  transition: transform .15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--ghost {
  background: rgba(255, 255, 255, .70);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
}

.btn--small {
  padding: 10px 14px;
  font-size: 14px;
}

/* hero */
.hero {
  padding-top: 72px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 42px;
  align-items: center;
}

.hero__title {
  font-size: clamp(34px, 4.4vw, 56px);
  line-height: 1.08;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}

.hero__lead {
  font-size: 16px;
  color: rgba(17, 24, 39, .78);
  margin: 0 0 22px;
  max-width: 52ch;
}

.hero__cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero__meta {
  margin-top: 26px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.metaItem {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .82);
  padding: 12px 14px;
  border-radius: 14px;
  min-width: 150px;
  box-shadow: var(--shadow);
}

.metaItem__num {
  font-weight: 900;
  font-size: 18px;
}

.metaItem__label {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.hero__visual {
  position: relative;
  min-height: 420px;
}

.device {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .82);
  border-radius: 28px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: translateZ(0);
}

.device__topbar {
  height: 44px;
  background: rgba(17, 24, 39, .03);
  border-bottom: 1px solid var(--border);
}

.device__screen {
  padding: 18px;
}

.chat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}

.bubble {
  max-width: 80%;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(17, 24, 39, .03);
}

.bubble--right {
  margin-left: auto;
  background: rgba(251, 191, 36, .22);
  border-color: rgba(245, 158, 11, .35);
}

.chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip {
  font-size: 12px;
  color: rgba(17, 24, 39, .86);
  background: rgba(251, 191, 36, .10);
  border: 1px solid rgba(245, 158, 11, .22);
  padding: 8px 10px;
  border-radius: 999px;
}

.floating {
  position: absolute;
  border-radius: 999px;
  filter: blur(.2px);
  opacity: .9;
}

.floating--a {
  width: 120px;
  height: 120px;
  left: -28px;
  top: 60px;
  background: radial-gradient(circle at 30% 30%, rgba(251, 191, 36, .45), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(245, 158, 11, .25), transparent 60%);
}

.floating--b {
  width: 160px;
  height: 160px;
  right: -40px;
  top: 30px;
  background: radial-gradient(circle at 30% 30%, rgba(245, 158, 11, .35), transparent 60%),
    radial-gradient(circle at 70% 70%, rgba(251, 191, 36, .25), transparent 60%);
}

.floating--c {
  width: 90px;
  height: 90px;
  right: 10px;
  bottom: -12px;
  background: radial-gradient(circle at 30% 30%, rgba(17, 24, 39, .10), transparent 60%);
}

/* headings */
.sectionHead {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.sectionHead h2 {
  font-size: 30px;
  margin: 0;
}

.sectionHead p {
  margin: 0;
  max-width: 58ch;
}

/* alt section */
.alt {
  background: rgba(17, 24, 39, .02);
  border-top: 1px solid rgba(17, 24, 39, .06);
  border-bottom: 1px solid rgba(17, 24, 39, .06);
}

/* CTA */
.cta__inner {
  border-radius: 26px;
  border: 1px solid rgba(245, 158, 11, .22);
  background: linear-gradient(135deg, rgba(251, 191, 36, .20), rgba(245, 158, 11, .10));
  padding: 32px;
  box-shadow: var(--shadow);
  text-align: center;
}

.cta__inner h2 {
  margin: 0 0 8px;
  font-size: 30px;
}

.cta__actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 14px;
}

/* footer */
.footer {
  padding: 26px 0;
  border-top: 1px solid rgba(17, 24, 39, .08);
  color: rgba(17, 24, 39, .70);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.footer__links {
  display: flex;
  gap: 12px;
}

.footer__links a {
  color: rgba(17, 24, 39, .65);
}

.footer__links a:hover {
  color: rgba(17, 24, 39, .92);
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .7s ease, transform .7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* anchor offset helper */
.anchor {
  position: relative;
  top: -80px;
  height: 1px;
}

/* TIPRI overview */
.overviewGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.overviewCard {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .82);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.overviewCard__img {
  aspect-ratio: 16 / 10;
  background: rgba(17, 24, 39, .04);
}

.overviewCard__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.overviewCard__body {
  padding: 16px 16px 18px;
}

.overviewCard__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.overviewCard__body p {
  margin: 0;
}

/* HowTo */
.howtoGrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.howtoCard {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .82);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.howtoCard h3 {
  margin: 0 0 8px;
}

.howtoCard p {
  margin: 0 0 14px;
}

/* Stores + FAQ */
.storesFaqGrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.storesPanel,
.faqPanel {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .82);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.storesList {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.storeItem {
  padding: 12px 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(17, 24, 39, .02);
}

.storeItem__name {
  font-weight: 900;
}

.storeItem__meta {
  font-size: 13px;
  margin-top: 2px;
}

.faqItem {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(17, 24, 39, .02);
  padding: 10px 12px;
  margin-top: 10px;
}

.faqItem summary {
  cursor: pointer;
  font-weight: 900;
}

.faqItem p {
  margin: 10px 0 0;
}

/* Responsive */
.br-md {
  display: none;
}

@media (max-width: 920px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    min-height: 360px;
  }

  .overviewGrid {
    grid-template-columns: 1fr;
  }

  .howtoGrid {
    grid-template-columns: 1fr;
  }

  .storesFaqGrid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .br-md {
    display: block;
  }

  .navToggle {
    display: inline-flex;
  }

  .nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    margin: 0;
    padding: 14px 18px 18px;
    display: none;
    flex-direction: column;
    gap: 10px;
    background: rgba(255, 255, 255, .92);
    border-bottom: 1px solid var(--border);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    width: 100%;
  }
}

/* ===== Hero Cover (LINEっぽい初期画面) ===== */
.heroCover {
  position: relative;
  min-height: calc(100vh - 68px);
  /* sticky header分を引く */
  padding-top: 68px;
  /* header下に潜らない */
  overflow: hidden;
}

/* 背景画像（ここを差し替える） */
.heroCover__bg {
  position: absolute;
  inset: 0;
  background-image: url("images/hero.jpg");
  /* ←好きな画像に */
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
}

/* 文字が読みやすいように薄い暗幕 */
.heroCover__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
      rgba(0, 0, 0, .45) 0%,
      rgba(0, 0, 0, .28) 35%,
      rgba(0, 0, 0, .18) 60%,
      rgba(0, 0, 0, .10) 100%);
}


.heroCover__content {
  position: relative;
  height: calc(100vh - 68px);
  display: flex;
  align-items: center;
  padding-bottom: 0;
}


.heroCover__copy {
  color: #fff;
  max-width: 760px;
}

.heroCover__kicker {
  margin: 0 0 10px;
  font-weight: 900;
  letter-spacing: .06em;
  opacity: .95;
}

.heroCover__title {
  margin: 0 0 10px;
  font-size: clamp(56px, 8vw, 120px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.heroCover__lead {
  margin: 0 0 22px;
  font-size: clamp(18px, 2.1vw, 32px);
  opacity: .92;
}

/* ダウンロード行（左下） */
.heroCover__download {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 6px;
}

.heroCover__label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  opacity: .95;
}

.heroCover__icons {
  display: flex;
  gap: 10px;
}

.heroIcon {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, .45);
  background: rgba(255, 255, 255, .12);
  display: grid;
  place-items: center;
  backdrop-filter: blur(6px);
}

.heroIcon:hover {
  background: rgba(255, 255, 255, .18);
}

.heroIcon__inner {
  font-weight: 900;
  font-size: 18px;
  line-height: 1;
  color: #fff;
}

/* 下中央のScroll */
.heroCover__scroll {
  position: absolute;
  left: 50%;
  bottom: 66px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, .9);
  text-decoration: none;
  z-index: 3;
}

.heroCover__scrollText {
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: none;
}

/* ラインを伸縮させる */
.heroCover__scrollLine {
  width: 1px;
  height: 44px;
  background: rgba(255, 255, 255, .75);
  border-radius: 2px;
  animation: scrollLine 1.4s ease-in-out infinite;
}

@keyframes scrollLine {
  0% {
    transform: translateY(0);
    opacity: .35;
    height: 30px;
  }

  50% {
    transform: translateY(6px);
    opacity: 1;
    height: 54px;
  }

  100% {
    transform: translateY(0);
    opacity: .35;
    height: 30px;
  }
}

/* 既存のrevealが白文字heroでも自然に見えるように */
.heroCover .reveal {
  opacity: 0;
  transform: translateY(10px);
}

.heroCover .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* スマホ調整 */
@media (max-width: 760px) {

  .heroCover__download {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .heroIcon {
    width: 44px;
    height: 44px;
  }
}

/* ===== Overview rows (左右レイアウト：LINEっぽい) ===== */
.overviewRows {
  display: flex;
  flex-direction: column;
  gap: 56px;
  /* 行間 */
}

.ovRow {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  /* 左：文章 / 右：画像 */
  gap: 44px;
  align-items: center;
  padding: 28px 0;
  border-top: 1px solid rgba(17, 24, 39, .06);
}

.ovRow:first-child {
  border-top: 0;
}

/* 画像左/文章右にしたい行 */
.ovRow--reverse .ovText {
  order: 2;
}

.ovRow--reverse .ovMedia {
  order: 1;
}

/* 左側テキスト */
.ovText {
  max-width: 560px;
}

.ovBadge {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 900;
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(17, 24, 39, .85);
  background: rgba(251, 191, 36, .18);
  border: 1px solid rgba(245, 158, 11, .22);
}

.ovTitle {
  margin: 14px 0 10px;
  font-size: clamp(28px, 3.2vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.ovLead {
  margin: 0 0 14px;
  color: rgba(17, 24, 39, .75);
  font-size: 15px;
  max-width: 52ch;
}

.ovList {
  margin: 0 0 18px;
  padding-left: 18px;
  color: rgba(17, 24, 39, .82);
}

.ovList li {
  margin: 8px 0;
}

/* 右側メディア（大きな画像＋枠） */
.ovMedia {
  display: flex;
  justify-content: center;
}

.ovFrame {
  width: min(720px, 100%);
  aspect-ratio: 16 / 10;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(17, 24, 39, .10);
  background: rgba(17, 24, 39, .03);
  box-shadow: var(--shadow);
  position: relative;
}

.ovFrame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* スマホ：縦積み */
@media (max-width: 920px) {
  .ovRow {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 18px 0;
  }

  .ovRow--reverse .ovText,
  .ovRow--reverse .ovMedia {
    order: unset;
  }

  .ovText {
    max-width: 100%;
  }
}

/* ===== HowTo overview (画像＋テキスト3列) ===== */
.howtoOverview {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  text-align: center;
}

.howtoOverview__item {
  max-width: 320px;
  margin-inline: auto;
}

.howtoOverview__img {
  margin-bottom: 18px;
}

.howtoOverview__img img {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: contain;
}

.howtoOverview__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.howtoOverview__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* スマホ対応 */
@media (max-width: 920px) {
  .howtoOverview {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}

/* ===== Start modal ===== */
.modal{
  position: fixed;
  inset: 0;
  display: none;
  z-index: 200;
}
.modal.is-open{
  display: block;
}

.modal__overlay{
  position:absolute;
  inset:0;
  background: rgba(17,24,39,.40);
}

.modal__card{
  position: relative;
  width: min(520px, calc(100% - 32px));
  margin: 120px auto 0;
  background: rgba(255,255,255,.92);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(17,24,39,.10); /* ここも弱め */
  padding: 18px;
  backdrop-filter: blur(10px);
}

.modal__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
}

.modal__head h3{
  margin: 0;
  font-size: 18px;
  font-weight: 900;
}

.modal__close{
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.8);
  cursor: pointer;
  font-size: 18px;
}

.modal__desc{
  margin: 10px 0 14px;
}

.modal__actions{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
}
.modal__actions .btn{
  flex: 1;
  min-width: 160px;
}

/* ===== Hero -> Image frame transition target ===== */
.heroCover__frame{
  position: absolute;
  left: 50%;
  top: 110px;                 /* スクショみたいに上寄せ */
  transform: translateX(-50%);
  width: min(1120px, calc(100% - 80px));
  height: 360px;              /* 横長の見た目 */
  border-radius: 0;           /* LINEっぽく角はほぼ無し */
  pointer-events: none;
  z-index: 1;                 /* bgより上、文字より下にしたい場合は調整 */
  opacity: 0;                 /* 枠自体は見せない（当たり判定用） */
}

/* 背景レイヤーは動かすので will-change */
.heroCover__bg{
  will-change: transform, filter;
  transform-origin: center center;
}
.heroCover__overlay{
  will-change: opacity;
}
.heroCover__copy,
.heroCover__scroll{
  will-change: opacity, transform;
}