:root {
  color-scheme: light;
  --ink: #121416;
  --muted: #5f6874;
  --line: #e4e8ee;
  --paper: #ffffff;
  --soft: #f6f8f7;
  --green: #00b67a;
  --green-deep: #078055;
  --orange: #f05a28;
  --red: #d62839;
  --yellow: #f7d64a;
  --shadow: 0 18px 40px rgba(14, 24, 36, .12);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1.6rem;
  line-height: 1.75;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

a:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 3px;
  border-radius: 8px;
}

.wrap {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 44px);
  border-bottom: 1px solid rgba(255, 255, 255, .18);
  background: rgba(13, 17, 22, .88);
  color: #fff;
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1.2;
}

.brand img {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: rgba(255, 255, 255, .78);
  font-size: 1.35rem;
  font-weight: 800;
}

.header-nav a {
  text-decoration: none;
}

.header-nav a:hover {
  color: var(--yellow);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(70px, 9vw, 122px) 0 86px;
  color: #fff;
  background:
    radial-gradient(circle at 80% 14%, rgba(247, 214, 74, .25) 0 7%, transparent 23%),
    radial-gradient(circle at 16% 90%, rgba(0, 182, 122, .25) 0 10%, transparent 27%),
    linear-gradient(132deg, #101414 0%, #092a22 31%, #a51f28 68%, #f05a28 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, .08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, .08) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(circle at 74% 26%, #000 0, transparent 38%);
  opacity: .55;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 390px);
  gap: 48px;
  align-items: center;
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--yellow);
  font-size: 1.4rem;
  font-weight: 950;
  line-height: 1.3;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(4.2rem, 6vw, 7.2rem);
  line-height: 1.08;
  letter-spacing: 0;
  font-weight: 950;
}

.lead {
  max-width: 760px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, .88);
  font-size: 1.9rem;
  line-height: 1.9;
  font-weight: 750;
}

.hero-actions,
.next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 13px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 950;
  line-height: 1.25;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--red));
  box-shadow: 0 14px 30px rgba(214, 40, 57, .28);
}

.button-ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, .24);
  background: rgba(255, 255, 255, .1);
}

.button-outline {
  color: var(--ink);
  border-color: rgba(18, 20, 22, .16);
  background: #fff;
}

.hero-panel {
  display: grid;
  gap: 12px;
}

.hero-panel div {
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 8px;
  background: rgba(255, 255, 255, .12);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .12);
}

.hero-panel span {
  display: block;
  margin-bottom: 8px;
  color: var(--yellow);
  font-size: 1.2rem;
  font-weight: 950;
  text-transform: uppercase;
}

.hero-panel strong {
  display: block;
  font-size: 1.8rem;
  line-height: 1.55;
}

section {
  padding: 88px 0;
}

.live-section {
  background:
    linear-gradient(135deg, rgba(0, 182, 122, .09), rgba(240, 90, 40, .09)),
    #f6f8f7;
}

.live-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 30px;
  align-items: stretch;
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.live-card-main h3 {
  margin-bottom: 16px;
  font-size: clamp(2.8rem, 4vw, 4.4rem);
  line-height: 1.2;
  letter-spacing: 0;
  font-weight: 950;
}

.live-card-main p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.7rem;
  line-height: 1.9;
  font-weight: 650;
}

.live-topic-list {
  display: grid;
  gap: 12px;
  align-content: center;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 8px;
  color: #fff;
  background:
    linear-gradient(145deg, rgba(16, 20, 22, .92), rgba(7, 128, 85, .9)),
    #101416;
}

.live-topic-list span {
  color: var(--yellow);
  font-size: 1.2rem;
  font-weight: 950;
  text-transform: uppercase;
}

.live-topic-list strong {
  display: block;
  padding: 12px 13px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 8px;
  background: rgba(255, 255, 255, .08);
  font-size: 1.45rem;
  line-height: 1.45;
}

.next-section {
  background: #fff;
}

.history-section {
  background:
    linear-gradient(180deg, #f7faf9 0%, #fff 100%);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 390px);
  gap: 34px;
  align-items: end;
  margin-bottom: 34px;
}

.section-head .section-kicker {
  color: var(--green-deep);
}

.section-head h2 {
  margin-bottom: 0;
  font-size: clamp(3rem, 4vw, 4.6rem);
  line-height: 1.2;
  letter-spacing: 0;
  font-weight: 950;
}

.section-head p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.65rem;
  font-weight: 650;
}

.next-card {
  display: grid;
  grid-template-columns: minmax(260px, 410px) minmax(0, 1fr);
  gap: 34px;
  align-items: center;
  padding: clamp(18px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(0, 182, 122, .08), rgba(240, 90, 40, .08)),
    #fff;
  box-shadow: var(--shadow);
}

.next-visual {
  display: block;
  overflow: hidden;
  border: 1px solid rgba(18, 20, 22, .1);
  border-radius: 8px;
  background: #fff;
  text-decoration: none;
}

.next-visual img {
  width: 100%;
}

.date-badge {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 7px 10px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--green), var(--green-deep));
  font-size: 1.3rem;
  font-weight: 950;
}

.next-body h3 {
  margin-bottom: 16px;
  font-size: clamp(2.8rem, 4vw, 4.2rem);
  line-height: 1.2;
  letter-spacing: 0;
  font-weight: 950;
}

.next-body p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.7rem;
  line-height: 1.9;
  font-weight: 650;
}

.benefit-list {
  display: grid;
  gap: 9px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.benefit-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: #20262d;
  font-weight: 800;
}

.benefit-list i {
  color: var(--orange);
  font-size: 2rem;
  line-height: 1.45;
}

.history-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.history-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 24px rgba(16, 24, 32, .08);
}

.history-card picture {
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #edf2f1;
}

.history-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.history-card div {
  padding: 16px;
}

.history-card span {
  display: block;
  margin-bottom: 6px;
  color: var(--green-deep);
  font-size: 1.25rem;
  font-weight: 950;
}

.history-card strong {
  display: block;
  font-size: 1.65rem;
  line-height: 1.45;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 28px;
}

.timeline span {
  display: block;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #323941;
  font-size: 1.4rem;
  font-weight: 700;
}

.timeline strong {
  color: var(--orange);
  font-weight: 950;
}

.site-footer {
  padding: 28px 0;
  color: rgba(255, 255, 255, .78);
  background: #101416;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-size: 1.35rem;
  font-weight: 700;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-inner a {
  color: #fff;
  text-decoration: none;
}

@media (max-width: 900px) {
  .hero-grid,
  .section-head,
  .live-card,
  .next-card {
    grid-template-columns: 1fr;
  }

  .history-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    min-height: auto;
  }

  .header-nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }

  .hero {
    padding-top: 58px;
  }

  .lead,
  .next-body p {
    font-size: 1.55rem;
  }

  section {
    padding: 68px 0;
  }

  .history-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

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