:root {
  --color-bg: #fbfaf6;
  --color-bg-soft: #f6f4ec;
  --color-card: #ffffff;
  --color-text: #263827;
  --color-muted: #6f7768;
  --color-primary: #6f8745;
  --color-primary-dark: #536b35;
  --color-border: rgba(82, 101, 62, 0.14);

  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Zen Maru Gothic", -apple-system, BlinkMacSystemFont,
    "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;

  --container: 1180px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --shadow-soft: 0 16px 40px rgba(46, 62, 38, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at 50% 0%, rgba(238, 236, 222, 0.55), transparent 420px),
    var(--color-bg);
  line-height: 1.8;
}

img {
  max-width: 100%;
  display: block;
}

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

/* ===== ヘッダー ===== */

.site-header {
  position: relative;
  z-index: 10;
  padding: 34px 0 20px;
}

.header-inner,
.section-inner,
.footer-inner {
  width: min(var(--container), calc(100% - 96px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: 22px;
  letter-spacing: 0.12em;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  overflow: hidden;
  color: var(--color-primary);
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.nav {
  display: flex;
  gap: 56px;
  font-size: 14px;
  font-weight: 600;
  color: #2d352a;
}

.nav a {
  opacity: 0.9;
  transition: opacity 0.2s ease;
}

.nav a:hover {
  opacity: 0.55;
}

/* ===== ヒーロー ===== */

.hero {
  position: relative;
  padding: 44px 0 112px;
  overflow: hidden;
}

/* ヒーロー4つの角にふんわり色（写真と同じ hero-inner 基準で配置） */
.hero-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    /* 左上：暖色（土色） */
    radial-gradient(circle 520px at 0% 0%, rgba(201, 162, 109, 0.22), transparent 85%),
    /* 左下：緑 */
    radial-gradient(circle 520px at 0% 100%, rgba(111, 135, 69, 0.20), transparent 85%),
    /* 右上：緑 */
    radial-gradient(circle 460px at 100% 0%, rgba(111, 135, 69, 0.15), transparent 85%),
    /* 右下：暖色（土色） */
    radial-gradient(circle 460px at 100% 100%, rgba(201, 162, 109, 0.16), transparent 85%);
}

.hero-inner {
  width: min(1280px, calc(100% - 96px));
  min-height: 560px;
  margin: 0 auto;
  position: relative;
  display: grid;
  grid-template-columns: 43% 57%;
  align-items: center;
}

.hero-text {
  position: relative;
  z-index: 2;
  padding: 36px 0 48px;
  /* テキストを中央寄りに配置 */
  padding-left: clamp(0px, 6vw, 96px);
  text-align: center;
}

.hero-text h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.5;
  letter-spacing: 0.04em;
  font-weight: 700;
  color: #263d29;
}

.hero-text p {
  margin: 38px 0 28px;
  color: var(--color-muted);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.app-store-button {
  display: inline-block;
  transition: transform 0.2s, opacity 0.2s;
}

.app-store-button img {
  height: 48px;
  display: block;
}

.app-store-button:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.hero-image {
  position: absolute;
  inset: 0 -72px 0 34%;
  z-index: 1;
  background-image:
    linear-gradient(
      90deg,
      var(--color-bg) 0%,
      rgba(251, 250, 246, 0.96) 16%,
      rgba(251, 250, 246, 0.72) 30%,
      rgba(251, 250, 246, 0.2) 48%,
      rgba(251, 250, 246, 0) 70%
    ),
    radial-gradient(circle at 16% 48%, var(--color-bg) 0%, rgba(251, 250, 246, 0.9) 10%, transparent 34%),
    url("../images/hero.jpg");
  background-size: cover;
  background-position: center right;
  border-radius: 0 0 0 120px;
  mask-image: radial-gradient(ellipse at 72% 45%, black 0%, black 70%, transparent 95%);
  -webkit-mask-image: radial-gradient(ellipse at 72% 45%, black 0%, black 70%, transparent 95%);
}

/* ===== セクション共通 ===== */

.section {
  padding: 96px 0;
}

.section-heading {
  text-align: center;
  margin-bottom: 56px;
}

.section-heading h2 {
  margin: 0;
  color: var(--color-primary);
  font-family: var(--font-serif);
  font-size: 30px;
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.section-heading span {
  display: inline-block;
  margin-top: 4px;
  color: var(--color-primary);
  font-size: 18px;
  opacity: 0.65;
}

/* ===== 機能紹介 ===== */

.features-section {
  padding-top: 104px;
  padding-bottom: 112px;
}

.feature-flow {
  display: grid;
  grid-template-columns: 1fr 44px 1fr 44px 1fr;
  align-items: stretch;
  gap: 16px;
}

.feature-card {
  min-height: 240px;
  padding: 40px 28px;
  text-align: center;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 16px;
}

.step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 76px;
  height: 24px;
  padding: 0 12px;
  color: #fff;
  background: var(--color-primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.feature-icon {
  width: 82px;
  height: 82px;
  margin: 22px auto 18px;
  display: grid;
  place-items: center;
  background: #eeeee4;
  border-radius: 50%;
  font-size: 32px;
}

.feature-card h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 24px;
  letter-spacing: 0.06em;
}

.feature-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.9;
}

.flow-arrow {
  align-self: center;
  color: var(--color-primary);
  font-size: 42px;
  font-family: var(--font-serif);
  text-align: center;
  opacity: 0.72;
}

/* ===== スクリーンショット ===== */

.screens-section {
  padding-top: 88px;
  padding-bottom: 116px;
}

.screen-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 56px;
  align-items: end;
}

.screen-item {
  margin: 0;
  text-align: center;
}

.screen-item img {
  width: 100%;
  max-width: 220px;
  margin: 0 auto;
  filter: drop-shadow(0 16px 24px rgba(38, 56, 39, 0.08));
}

.screen-item figcaption {
  display: inline-flex;
  justify-content: center;
  min-width: 150px;
  margin-top: 22px;
  padding: 6px 18px;
  color: var(--color-primary-dark);
  background: #efeee6;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* ===== Q&A ===== */

.faq-section {
  padding-top: 88px;
  padding-bottom: 72px;
}

.faq-box {
  padding: 46px 54px 50px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 14px 42px rgba(46, 62, 38, 0.04);
}

.faq-box .section-heading {
  margin-bottom: 34px;
}

.faq-list {
  display: flex;
  flex-direction: column;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 22px 0;
}

.faq-item:first-child {
  padding-top: 8px;
}

.faq-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 34px 1fr 20px;
  gap: 16px;
  align-items: center;
  font-weight: 700;
  color: var(--color-text);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "⌄";
  color: var(--color-primary);
  font-size: 20px;
  justify-self: end;
}

.faq-item[open] summary::after {
  content: "⌃";
}

.q-icon {
  width: 30px;
  height: 30px;
  display: inline-grid;
  place-items: center;
  color: #fff;
  background: var(--color-primary);
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
}

.faq-item p {
  margin: 8px 0 0 50px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.9;
}

/* ===== お問い合わせ ===== */

.contact-section {
  padding: 40px 0 72px;
}

.contact-card {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 34px;
  align-items: center;
  padding: 34px 54px;
  background: #f3f3e9;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.contact-icon {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  color: var(--color-primary);
  background: rgba(255, 255, 255, 0.66);
  border-radius: 50%;
}

.contact-icon svg {
  width: 36px;
  height: 36px;
}

.contact-text h2 {
  margin: 0 0 4px;
  color: var(--color-primary);
  font-family: var(--font-serif);
  font-size: 30px;
  letter-spacing: 0.12em;
}

.contact-text p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  min-width: 236px;
  height: 58px;
  padding: 0 28px;
  color: #fff;
  background: linear-gradient(135deg, #6f8745, #5d7739);
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.08em;
  box-shadow: 0 12px 26px rgba(83, 107, 53, 0.16);
}

.contact-button span {
  font-size: 24px;
  line-height: 1;
}

/* ===== フッター ===== */

.site-footer {
  padding: 28px 0 36px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: #8a8d82;
  font-size: 13px;
}

.footer-inner a {
  transition: color 0.2s ease;
}

.footer-inner a:hover {
  color: var(--color-primary);
}

/* ===== レスポンシブ ===== */

@media (max-width: 980px) {
  .header-inner,
  .section-inner,
  .footer-inner,
  .hero-inner {
    width: min(100% - 40px, var(--container));
  }

  .nav {
    display: none;
  }

  .hero {
    padding: 24px 0 72px;
  }

  /* タブレット以下では装飾を非表示 */
  .hero-inner::before {
    display: none;
  }

  .hero-inner {
    display: block;
    min-height: auto;
    padding-top: 360px;
  }

  .hero-image {
    inset: 0 -20px auto -20px;
    height: 360px;
    border-radius: 0;
    background-image:
      linear-gradient(
        180deg,
        rgba(251, 250, 246, 0) 0%,
        rgba(251, 250, 246, 0.25) 52%,
        var(--color-bg) 100%
      ),
      url("../images/hero.jpg");
    background-position: center;
    mask-image: none;
    -webkit-mask-image: none;
  }

  .hero-text {
    padding-top: 56px;
    padding-left: 0;
  }

  .hero-text h1 {
    font-size: 30px;
  }

  .pc-only {
    display: none;
  }

  .feature-flow {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .flow-arrow {
    transform: rotate(90deg);
    font-size: 30px;
  }

  .screen-grid {
    display: flex;
    grid-template-columns: none;
    gap: 28px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 12px;
    /* セクションのpaddingを超えてスクロール領域を画面端まで広げる */
    margin: 0 -20px;
    padding-left: 20px;
    padding-right: 20px;
    /* スクロールバー非表示 */
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .screen-grid::-webkit-scrollbar {
    display: none;
  }

  .screen-item {
    flex: 0 0 220px;
    scroll-snap-align: center;
  }

  .screen-item img {
    max-width: 220px;
  }

  .contact-card {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
    padding: 36px 26px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding-top: 24px;
  }

  .logo {
    font-size: 18px;
  }

  .hero-inner {
    padding-top: 300px;
  }

  .hero-image {
    height: 300px;
  }

  .hero-text h1 {
    font-size: 26px;
    line-height: 1.5;
  }

  .hero-text p {
    font-size: 14px;
  }

  .section {
    padding: 72px 0;
  }

  .section-heading {
    margin-bottom: 36px;
  }

  .section-heading h2 {
    font-size: 25px;
  }

  .feature-card {
    padding: 30px 22px;
  }

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

  .screen-item img {
    max-width: 230px;
  }

  .faq-box {
    padding: 34px 22px;
  }

  .faq-item summary {
    grid-template-columns: 30px 1fr 18px;
    gap: 12px;
    font-size: 14px;
  }

  .faq-item p {
    margin-left: 42px;
    font-size: 13px;
  }

  .contact-button {
    width: 100%;
    min-width: 0;
  }
}