/* 阿蘇ドローン手形BIZ */
:root {
  --ink: #273544;        
  --ink-dark: #1c2733;
  --muted: #707070;
  --line: #e3e8ec;
  --bg: #ffffff;
  --tint: #eef1f4;       /* 薄いグレーの背景 */
  --accent: #4f8a5b;     /* 草原のグリーン（差し色のみ） */
  --radius: 12px;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: "Noto Sans JP", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.9;
  font-size: 16px;
  letter-spacing: .03em;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--ink); }
h1, h2, h3 { line-height: 1.5; margin: 0; }
.container { width: min(var(--max), 100% - 32px); margin-inline: auto; }
.sp { display: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: space-between; gap: 28px;
  padding: 16px 28px; border-radius: 999px;
  font-family: "Open Sans", "Noto Sans JP", sans-serif; font-weight: 600;
  text-decoration: none; letter-spacing: .04em;
  transition: background .15s, transform .15s;
}
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(4px); }
.btn-primary { background: #fff; color: var(--ink); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.btn-primary:hover { background: #f1f4f6; }
.btn-sm { padding: 8px 20px; font-size: 13px; background: var(--ink); color: #fff; }
.btn-sm:hover { background: var(--ink-dark); }
.btn-lg { padding: 20px 40px; font-size: 17px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { width: min(var(--max), 100% - 32px); margin-inline: auto; display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { font-weight: 700; font-size: 17px; color: var(--ink); text-decoration: none; white-space: nowrap; }
.logo span, .footer-logo span { color: inherit; font: inherit; margin: 0; }
.nav { display: flex; gap: 28px; margin-left: auto; }
.nav a { font-family: "Open Sans", sans-serif; font-size: 13px; letter-spacing: .1em; text-decoration: none; }
.nav a:hover { color: var(--accent); }

/* ---------- hero ---------- */
.hero { position: relative; min-height: min(90vh, 780px); display: grid; align-items: end; color: #fff; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,28,38,.15) 0%, rgba(20,28,38,.35) 45%, rgba(20,28,38,.8) 100%); }
.hero-inner { position: relative; z-index: 1; width: min(var(--max), 100% - 32px); margin-inline: auto; padding: 0 0 72px; }
.hero h1 { font-size: clamp(22px, 3vw, 32px); font-weight: 700; }
.hero-lead { margin: 6px 0 28px; opacity: .9; }
.hero-scroll { position: absolute; right: 24px; bottom: 28px; z-index: 1; font-family: "Open Sans", sans-serif; font-size: 11px; letter-spacing: .2em; writing-mode: vertical-rl; }
.hero-scroll::after { content: ""; display: block; width: 1px; height: 56px; background: rgba(255,255,255,.7); margin: 10px auto 0; }

/* ---------- section / heading ---------- */
.section { padding: 96px 0; }
.section-tint { background: var(--tint); }
.sec-label { margin: 0 0 28px; display: flex; flex-direction: column; gap: 4px; }
.sec-jp { font-weight: 700; font-size: 14px; }
.sec-en { font-family: "Oswald", sans-serif; font-weight: 500; font-size: clamp(44px, 6.5vw, 72px); line-height: 1; letter-spacing: .04em; }
.sec-label-light { color: #fff; }

/* ---------- card ---------- */
.card { background: #fff; border-radius: var(--radius); padding: clamp(24px, 5vw, 56px); box-shadow: 0 2px 12px rgba(39,53,68,.06); }
.section:not(.section-tint) .card { border: 1px solid var(--line); box-shadow: none; }
.card h2 { font-size: clamp(21px, 2.6vw, 28px); font-weight: 700; margin-bottom: 20px; }

/* ---------- concept ---------- */
.points { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.points li { padding: 28px 24px 4px 0; }
.points li + li { padding-left: 24px; border-left: 1px solid var(--line); }
.points strong { display: block; font-family: "Oswald", sans-serif; font-weight: 500; font-size: 44px; line-height: 1.1; }
.points small { font-family: "Noto Sans JP", sans-serif; font-size: 16px; margin-left: 4px; }
.points span { display: block; font-size: 14px; color: var(--muted); margin-top: 8px; }

/* ---------- field ---------- */
.map { margin: 0 0 48px; }
.map img { width: 100%; border-radius: 8px; }
.map figcaption { font-size: 13px; color: var(--muted); text-align: center; padding-top: 10px; }
.tag-new { font-style: normal; font-family: "Oswald", sans-serif; font-size: 12px; letter-spacing: .12em; background: var(--accent); color: #fff; padding: 2px 8px; border-radius: 4px; vertical-align: 3px; margin-left: 6px; }

.movies { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 32px; }
.movie-frame { position: relative; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden; background: #000; }
.movie-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.movie p { margin: 8px 0 0; font-size: 14px; color: var(--muted); }

/* ---------- usecase ---------- */
.usecases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.usecase { padding: 0; overflow: hidden; }
.usecase img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.usecase h3 { font-size: 18px; padding: 22px 24px 6px; }
.usecase p { margin: 0; padding: 0 24px 26px; color: #4a5663; font-size: 15px; }

/* ---------- guide ---------- */
.flow { list-style: none; padding: 0; margin: 0 0 56px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.flow li { border-top: 3px solid var(--ink); padding-top: 16px; }
.flow-step { font-family: "Oswald", sans-serif; font-size: 22px; color: var(--ink); }
.flow h3 { font-size: 17px; margin: 2px 0 6px; }
.flow p { margin: 0; font-size: 14px; color: #4a5663; }
.faq-title { padding-top: 8px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:first-child { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 40px 18px 34px; position: relative; font-weight: 700; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; position: absolute; left: 0; top: 15px; font-family: "Oswald", sans-serif; font-size: 20px; }
.faq summary::after { content: "+"; position: absolute; right: 8px; top: 12px; font-size: 24px; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 20px 34px; color: #4a5663; }

/* ---------- access ---------- */
.access { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.access p { margin-top: 0; }
.access > img { border-radius: 8px; aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.access-list { margin: 16px 0 20px; }
.access-list div { display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); padding: 10px 0; }
.access-list dd { margin: 0; font-weight: 700; }
.text-link { font-weight: 700; }
.small { font-size: 14px; color: var(--muted); margin-top: 16px; }

/* ---------- contact ---------- */
.final-cta { position: relative; color: #fff; padding: 110px 0; overflow: hidden; }
.final-cta-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.final-cta::after { content: ""; position: absolute; inset: 0; background: rgba(20, 28, 38, .74); }
.final-cta-inner { position: relative; z-index: 1; }
.final-cta h2 { font-size: clamp(24px, 3.2vw, 34px); font-weight: 700; margin-bottom: 14px; }
.final-cta p { margin: 0 0 32px; opacity: .92; }
.final-cta-mail { font-size: 14px; margin-top: 24px !important; }
.final-cta-mail a { color: #fff; }

/* ---------- footer ---------- */
.site-footer { background: #141c26; color: rgba(255,255,255,.75); padding: 48px 0 96px; font-size: 14px; }
.site-footer a { color: #fff; }
.footer-logo { font-weight: 700; font-size: 19px; color: #fff; }
.copy { opacity: .6; font-size: 12px; margin-top: 24px; }

.sticky-cta { display: none; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .nav { display: none; }
  .header-inner .btn-sm { margin-left: auto; }
  .usecases { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr 1fr; row-gap: 28px; }
}
@media (max-width: 680px) {
  .pc { display: none; }
  .sp { display: inline; }
  .section { padding: 72px 0; }
  .points { grid-template-columns: 1fr; }
  .points li, .points li + li { padding: 20px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .movies, .access, .flow { grid-template-columns: 1fr; }
  .access { gap: 28px; }
  .hero { min-height: 620px; }
  .hero-inner { padding-bottom: 96px; }
  .hero .btn { width: 100%; }
  .logo { font-size: 15px; }
  .sticky-cta {
    display: block; position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 60;
    background: var(--ink); color: #fff; text-align: center; font-weight: 700;
    padding: 14px; border-radius: 999px; text-decoration: none; box-shadow: 0 8px 24px rgba(0,0,0,.25);
  }
}

/* ---------- 長期利用・大企業向けの強調 ---------- */
.track { border-left: 3px solid var(--accent); padding-left: 14px; font-weight: 700; color: var(--ink) !important; }
.usecase-main h3::before { content: "MAIN"; display: inline-block; font-family: "Oswald", sans-serif; font-size: 11px; letter-spacing: .12em; background: var(--ink); color: #fff; padding: 1px 8px; border-radius: 4px; margin-right: 8px; vertical-align: 3px; }
.longterm { list-style: none; padding: 0; margin: 0 0 56px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.longterm li { background: var(--tint); border-radius: 8px; padding: 20px 22px; }
.longterm h3 { font-size: 16px; margin-bottom: 4px; }
.longterm p { margin: 0; font-size: 14px; color: #4a5663; }
@media (max-width: 680px) { .longterm { grid-template-columns: 1fr; } }

/* ---------- hero ---------- */
.hero-tag { display: inline-block; margin: 0 0 18px; font-size: 13px; font-weight: 700; letter-spacing: .1em; padding: 4px 14px; border: 1px solid rgba(255,255,255,.7); border-radius: 999px; }
.hero h1 { font-size: clamp(30px, 4.6vw, 54px); font-weight: 700; letter-spacing: .04em; text-shadow: 0 2px 18px rgba(0,0,0,.25); }
.hero-lead { max-width: 640px; }

/* ---------- about ---------- */
.about { display: grid; grid-template-columns: 1fr; max-width: 860px; }
.about h2 { font-size: clamp(22px, 2.8vw, 30px); margin-bottom: 20px; }
.about p { color: #4a5663; margin: 0 0 14px; }

/* ---------- areas ---------- */
.area-grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.area-grid li { background: #fff; border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.area-grid img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.area-body { padding: 22px 26px 28px; }
.area-name { margin: 0 0 4px; font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: .06em; }
.area-name span { font-family: "Oswald", sans-serif; font-size: 15px; margin-right: 10px; color: var(--muted); }
.area-grid h3 { font-size: 19px; margin-bottom: 8px; }
.area-grid p:not(.area-name) { margin: 0; font-size: 15px; color: #4a5663; }
.map { background: #fff; padding: 12px; border-radius: var(--radius); }
.nav a { font-family: "Noto Sans JP", sans-serif; letter-spacing: .04em; }
@media (max-width: 680px) { .area-grid { grid-template-columns: 1fr; } }
@media (max-width: 680px) { .hero h1 { font-size: 28px; } .hero .btn { padding: 16px 22px; } }
.stay-title { font-weight: 700; font-size: 14px; margin: 20px 0 4px; }
.stay { list-style: none; padding: 0; margin: 0; font-size: 14px; }
.stay li { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.stay span { color: var(--muted); text-align: right; }

/* ---------- 牧野の案内 ---------- */
.bokuya { background: #fff; border-radius: var(--radius); padding: 24px 28px; margin: -24px 0 32px; }
.bokuya h3 { font-size: 17px; margin-bottom: 10px; }
.bokuya dl { margin: 0 0 12px; }
.bokuya dl div { display: flex; gap: 16px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.bokuya dt { flex: 0 0 9em; font-weight: 700; }
.bokuya dd { margin: 0; }
.bokuya ul { margin: 0; padding-left: 1.2em; font-size: 14px; color: #4a5663; }
.bokuya li { list-style: "※ "; }
@media (max-width: 680px) { .bokuya dl div { flex-direction: column; gap: 0; } .bokuya dt { flex: none; } }
.bokuya .size { display: block; font-family: "Oswald", "Noto Sans JP", sans-serif; font-size: 18px; letter-spacing: .03em; color: var(--ink); }
.bokuya .size small { font-family: "Noto Sans JP", sans-serif; font-size: 13px; color: var(--muted); margin-left: 4px; }
.points small.pre { margin: 0 4px 0 0; }

/* ---------- プラン ---------- */
.sub-title { font-size: clamp(19px, 2.2vw, 24px); margin: 8px 0 6px; }
.sub-lead { color: #4a5663; margin: 0 0 24px; }
.plan-size { font-family: "Oswald", "Noto Sans JP", sans-serif; font-size: 26px; line-height: 1.2; margin: 2px 0 10px !important; color: var(--ink) !important; }
.area-note { font-size: 13px; color: var(--muted); margin: 16px 0 56px; }
.area-grid.facilities { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .area-grid.facilities { grid-template-columns: 1fr 1fr; } }
@media (max-width: 680px) { .area-grid.facilities { grid-template-columns: 1fr; } }
.area-grid p.plan-size { font-size: 26px; }
.tm { font-size: 11px; opacity: .6; margin: 24px 0 0; }
.tm + .copy { margin-top: 4px; }

/* ============================================================
   ドローン手形シリーズの雰囲気（太いゴシック・広い字間・グレーの帯・黒ボタン）
   ============================================================ */
h1, h2, h3, .logo, .footer-logo { letter-spacing: .08em; }
.hero h1 { font-weight: 900; letter-spacing: .1em; }
.section h2, .about h2, .final-cta h2 { font-weight: 900; letter-spacing: .1em; }
.dfp { display: block; font-family: "Oswald", sans-serif; font-weight: 600; font-size: 11px; letter-spacing: .25em; line-height: 1.2; margin-bottom: 2px; }
.hero-tag { border-radius: 0; border: 0; padding: 0; font-size: 14px; letter-spacing: .12em; }
.hero-tag .dfp { font-size: 12px; opacity: .85; }
.sub-title { background: #e6e6e6; text-align: center; padding: 10px 16px; font-weight: 900; letter-spacing: .12em; font-size: 18px !important; margin: 8px 0 18px !important; }
.sub-lead { text-align: center; }
.btn-sm, .sticky-cta { background: #111 !important; }
.btn-sm:hover { background: #333 !important; }
.btn-primary { letter-spacing: .1em; }

/* footer: シリーズ */
.series { border-top: 1px solid rgba(255,255,255,.15); border-bottom: 1px solid rgba(255,255,255,.15); padding: 20px 0; margin: 24px 0; }
.series-title { color: #fff; font-weight: 700; letter-spacing: .12em; margin: 0 0 10px; }
.series ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 28px; }
.series li { display: flex; gap: 8px; align-items: baseline; }
.series li span:not(.current) { font-size: 11px; opacity: .6; }
.series .current { color: #fff; font-weight: 700; }