:root {
  --bg: #061426;
  --bg-soft: #0a213d;
  --panel: rgba(12, 35, 63, 0.78);
  --panel-strong: #102b4c;
  --line: rgba(230, 194, 105, 0.28);
  --gold: #f0c75e;
  --gold-2: #d99b32;
  --text: #f6f3e8;
  --muted: #b8c6d8;
  --blue: #75b8ff;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --wrap: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 85% 8%, rgba(52, 121, 193, 0.14), transparent 28rem),
    radial-gradient(circle at 12% 44%, rgba(221, 173, 63, 0.08), transparent 30rem),
    var(--bg);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
.wrap { width: var(--wrap); margin-inline: auto; }
.section { padding: 104px 0; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  transform: translateY(-150%);
  padding: 10px 16px;
  color: #071426;
  background: var(--gold);
  border-radius: 8px;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(24px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(255,255,255,.08);
  background: rgba(4, 16, 31, 0.74);
  backdrop-filter: blur(18px);
}
.brand img { width: 118px; max-height: 58px; object-fit: contain; }
.site-header nav { display: flex; align-items: center; gap: 28px; }
.site-header nav a {
  text-decoration: none;
  color: #dce6f2;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
}
.site-header nav a:hover { color: var(--gold); }
.site-header .nav-play {
  padding: 9px 17px;
  color: #09172a;
  border-radius: 999px;
  background: linear-gradient(135deg, #ffe28a, #d99b32);
}
.site-header .nav-play:hover { color: #09172a; transform: translateY(-1px); }

.hero {
  position: relative;
  min-height: 860px;
  display: grid;
  align-items: center;
  padding: 136px 0 88px;
  isolation: isolate;
}
.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(4,15,29,.98) 0%, rgba(4,15,29,.88) 40%, rgba(4,15,29,.42) 73%, rgba(4,15,29,.76) 100%),
    linear-gradient(180deg, rgba(4,15,29,.1) 0%, var(--bg) 100%),
    url("background.png") center / cover no-repeat;
}
.hero-backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}
.hero-content {
  display: grid;
  grid-template-columns: minmax(0, .86fr) minmax(460px, 1.14fr);
  gap: 72px;
  align-items: center;
}
.eyebrow, .section-kicker {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .24em;
}
.hero h1 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(44px, 5.2vw, 76px);
  line-height: 1.23;
  letter-spacing: .02em;
  text-shadow: 0 6px 26px rgba(0,0,0,.5);
}
.hero-lead {
  margin: 28px 0 0;
  color: #d3deea;
  font-size: 17px;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.hero-tags span {
  padding: 6px 12px;
  color: #f6e7b4;
  border: 1px solid rgba(240,199,94,.38);
  border-radius: 999px;
  background: rgba(8,25,45,.7);
  font-size: 12px;
  font-weight: 700;
}
.hero-actions, .start-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button.primary {
  color: #09172a;
  background: linear-gradient(135deg, #ffe38d, #d99a30);
  box-shadow: 0 14px 34px rgba(217,154,48,.25);
}
.button.secondary { border-color: rgba(255,255,255,.22); background: rgba(4,15,29,.56); }
.button.secondary:hover { border-color: rgba(240,199,94,.58); }
.button.support { color: #f4d6e2; border-color: rgba(245,151,183,.35); background: rgba(91,23,50,.34); }
.hero-note { margin: 14px 0 0; color: #91a4ba; font-size: 12px; }
.hero-shot {
  position: relative;
  margin: 0;
  transform: perspective(1400px) rotateY(-5deg) rotateX(1deg);
  border: 1px solid rgba(240,199,94,.38);
  border-radius: 18px;
  background: #0b1e36;
  box-shadow: 0 30px 100px rgba(0,0,0,.62), 0 0 65px rgba(53,122,198,.18);
  overflow: hidden;
}
.hero-shot::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.08), inset 0 -80px 80px rgba(0,0,0,.2);
}
.hero-shot img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.hero-shot figcaption {
  position: absolute;
  z-index: 2;
  right: 18px;
  bottom: 14px;
  padding: 7px 11px;
  color: #e8eef6;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 8px;
  background: rgba(2,11,23,.78);
  font-size: 11px;
  backdrop-filter: blur(10px);
}

.intro {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 80px;
  padding-top: 30px;
  padding-bottom: 100px;
  border-bottom: 1px solid rgba(255,255,255,.07);
}
h2 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.35;
}
.intro > p { margin: 8px 0 0; color: var(--muted); font-size: 17px; }

.section-heading { max-width: 760px; margin-bottom: 48px; }
.section-heading > p:last-child { color: var(--muted); }
.features { background: linear-gradient(180deg, rgba(10,33,61,.5), rgba(6,20,38,.12)); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature-card {
  min-height: 270px;
  padding: 30px 26px;
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 16px;
  background: linear-gradient(155deg, rgba(20,52,88,.82), rgba(8,25,46,.78));
  box-shadow: inset 0 1px rgba(255,255,255,.04);
}
.feature-number { color: var(--gold); font: 800 12px/1 system-ui, sans-serif; letter-spacing: .15em; }
.feature-card h3 { margin: 64px 0 12px; font-size: 20px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }

.screenshots { position: relative; }
.shot-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.shot-wide { grid-column: 1 / -1; }
.shot-card {
  margin: 0;
  border: 1px solid rgba(240,199,94,.18);
  border-radius: 16px;
  background: rgba(9,28,51,.72);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.shot-card a { display: block; overflow: hidden; }
.shot-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform .45s ease, filter .45s ease; }
.shot-card:hover img { transform: scale(1.018); filter: brightness(1.05); }
.shot-card figcaption { display: flex; gap: 14px; align-items: baseline; padding: 17px 20px; }
.shot-card figcaption b { color: var(--gold); }
.shot-card figcaption span { color: var(--muted); font-size: 13px; }
.gallery-note { margin: 16px 0 0; color: #7f93aa; font-size: 12px; text-align: right; }

.modes { background: #07182d; border-block: 1px solid rgba(255,255,255,.06); }
.modes-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 90px; align-items: start; }
.sticky-heading { position: sticky; top: 120px; margin: 0; }
.sticky-heading > p:last-child { margin-top: 24px; }
.mode-list { border-top: 1px solid var(--line); }
.mode-list article {
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 26px;
  padding: 28px 4px;
  border-bottom: 1px solid rgba(255,255,255,.09);
}
.mode-list article > span { padding-top: 6px; color: var(--gold); font-size: 10px; font-weight: 800; letter-spacing: .16em; }
.mode-list h3 { margin: 0 0 7px; font-size: 21px; }
.mode-list p { margin: 0; color: var(--muted); font-size: 14px; }

.start { padding-block: 72px; }
.start-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 54px 58px;
  border: 1px solid rgba(240,199,94,.28);
  border-radius: 20px;
  background:
    linear-gradient(105deg, rgba(9,30,55,.96), rgba(13,49,86,.8)),
    url("background.png") center / cover;
  box-shadow: var(--shadow);
}
.start-box h2 { font-size: clamp(30px, 3.5vw, 44px); }
.start-box p:not(.section-kicker) { color: var(--muted); }
.start-actions { min-width: 260px; flex-direction: column; margin: 0; }

.information { padding-top: 72px; }
.info-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: 80px; }
.info-grid dl { margin: 0; border-top: 1px solid rgba(255,255,255,.12); }
.info-grid dl div { display: grid; grid-template-columns: 160px 1fr; gap: 20px; padding: 17px 0; border-bottom: 1px solid rgba(255,255,255,.09); }
.info-grid dt { color: #8da0b6; font-size: 13px; }
.info-grid dd { margin: 0; }

.credits { padding: 42px 0; border-top: 1px solid rgba(255,255,255,.07); background: rgba(3,12,24,.38); }
.credits-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 70px; }
.credits h2 { font-size: 23px; }
.credits p, .credits li { color: #8fa1b5; font-size: 12px; }
.credits ul { margin: 0; padding-left: 18px; }

.site-footer { padding: 50px 0 42px; border-top: 1px solid rgba(255,255,255,.08); background: #030d1a; }
.footer-inner { display: grid; grid-template-columns: 160px 1fr auto; gap: 34px; align-items: center; }
.footer-inner > img { width: 130px; }
.footer-inner > div { display: flex; gap: 22px; }
.footer-inner a { color: #aab9c9; font-size: 13px; text-decoration: none; }
.footer-inner a:hover { color: var(--gold); }
.footer-inner p { margin: 0; color: #6e8197; font-size: 11px; }

@media (max-width: 980px) {
  .site-header { height: 68px; }
  .site-header nav a:not(.nav-play) { display: none; }
  .hero { min-height: auto; padding-top: 116px; }
  .hero-content { grid-template-columns: 1fr; gap: 52px; }
  .hero-copy { max-width: 720px; }
  .hero-shot { transform: none; }
  .intro, .modes-layout, .info-grid { grid-template-columns: 1fr; gap: 40px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .sticky-heading { position: static; }
  .start-box { align-items: flex-start; flex-direction: column; }
  .start-actions { width: 100%; flex-direction: row; }
  .credits-inner { grid-template-columns: 1fr; gap: 20px; }
  .footer-inner { grid-template-columns: 130px 1fr; }
  .footer-inner p { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  :root { --wrap: min(100% - 28px, 1180px); }
  .section { padding: 74px 0; }
  .site-header { padding-inline: 14px; }
  .brand img { width: 90px; }
  .site-header .nav-play { padding: 8px 13px; font-size: 12px; }
  .hero { padding: 100px 0 60px; }
  .hero-backdrop { background-position: 62% center; }
  .hero h1 { font-size: 40px; }
  .hero-lead { font-size: 14px; }
  .hero-lead br { display: none; }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .hero-shot figcaption { display: none; }
  .intro { padding-bottom: 72px; }
  .feature-grid, .shot-grid { grid-template-columns: 1fr; }
  .shot-wide { grid-column: auto; }
  .feature-card { min-height: 220px; }
  .feature-card h3 { margin-top: 42px; }
  .shot-card figcaption { display: block; }
  .shot-card figcaption span { display: block; margin-top: 4px; }
  .mode-list article { grid-template-columns: 1fr; gap: 8px; }
  .start-box { padding: 38px 24px; }
  .start-actions { flex-direction: column; }
  .info-grid dl div { grid-template-columns: 1fr; gap: 3px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-inner > div { flex-wrap: wrap; }
  .footer-inner p { grid-column: auto; }
}

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


/* v1.8.8: content-rich public top page */
.update-list { display:grid; gap:14px; }
.update-list article { display:grid; grid-template-columns:120px 1fr; gap:26px; padding:22px 24px; border:1px solid rgba(255,255,255,.09); border-radius:16px; background:rgba(10,29,52,.72); }
.update-list time { color:var(--gold); font-size:13px; letter-spacing:.08em; }
.update-list h3 { margin:0 0 5px; font-size:18px; }
.update-list p { margin:0; color:var(--muted); font-size:13px; }
.faq-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; }
.faq-grid details { border:1px solid rgba(255,255,255,.09); border-radius:16px; background:rgba(10,29,52,.72); padding:20px 22px; }
.faq-grid summary { cursor:pointer; color:#f0f4f9; font-weight:700; }
.faq-grid p { margin:12px 0 0; color:var(--muted); font-size:13px; }
@media(max-width:640px){.update-list article{grid-template-columns:1fr;gap:5px}.faq-grid{grid-template-columns:1fr}}