:root {
  --ink: #102a43;
  --muted: #627d98;
  --paper: #f4f7fb;
  --line: #d9e2ec;
  --navy: #052b51;
  --blue: #0967b5;
  --light-blue: #eaf5ff;
  --orange: #f3a622;
  --green: #0f9d72;
  --white: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
a { color: inherit; }

.landing-hero {
  min-height: 580px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(4, 34, 65, .98) 0%, rgba(5, 50, 91, .88) 46%, rgba(6, 40, 75, .38) 100%),
    url("../u15/assets/share-cover.png") center / cover no-repeat;
}

.site-nav,
.hero-content,
.age-section,
.site-footer {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  border-bottom: 1px solid rgba(255, 255, 255, .18);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  color: var(--white);
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: .03em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 54px;
  height: 31px;
  border-radius: 4px;
  color: var(--navy);
  background: var(--orange);
  font-size: 12px;
  letter-spacing: .08em;
}

.nav-label {
  color: rgba(255, 255, 255, .7);
  font-size: 13px;
  letter-spacing: .12em;
}

.hero-content { padding: 86px 0 112px; }
.hero-kicker,
.section-kicker {
  margin: 0 0 14px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
}

.hero-content h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(48px, 7vw, 78px);
  line-height: 1.08;
  letter-spacing: .03em;
}

.hero-description {
  max-width: 590px;
  margin: 24px 0 30px;
  color: rgba(255, 255, 255, .82);
  font-size: 17px;
  line-height: 1.8;
}

.hero-action,
.card-action,
.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.hero-action {
  padding: 0 22px;
  color: var(--navy);
  background: var(--orange);
}
.hero-action:hover { background: #ffbb3e; }

.age-section { padding: 72px 0 68px; }
.section-intro {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 30px;
}
.section-intro h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 42px);
  letter-spacing: .02em;
}
.section-intro > p {
  max-width: 500px;
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.age-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.age-card {
  position: relative;
  min-height: 360px;
  overflow: hidden;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: var(--white);
  box-shadow: 0 8px 28px rgba(16, 42, 67, .06);
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.age-card::after {
  content: "";
  position: absolute;
  right: -54px;
  bottom: -68px;
  width: 180px;
  height: 180px;
  border: 32px solid var(--light-blue);
  border-radius: 50%;
}

.age-card:hover {
  transform: translateY(-5px);
  border-color: #9dc9ed;
  box-shadow: 0 16px 36px rgba(16, 42, 67, .12);
}

.age-card--live {
  border-color: #7db8e7;
  color: var(--white);
  background: linear-gradient(145deg, var(--navy), var(--blue));
}
.age-card--live::after { border-color: rgba(255, 255, 255, .08); }

.card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.status {
  display: inline-flex;
  align-items: center;
  min-height: 27px;
  padding: 0 9px;
  border-radius: 4px;
  color: var(--muted);
  background: #eef3f8;
  font-size: 11px;
  font-weight: 800;
}
.status--live { color: #baf2df; background: rgba(15, 157, 114, .22); }
.year { color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .1em; }
.age-card--live .year { color: rgba(255, 255, 255, .6); }

.age-number {
  margin-top: 38px;
  color: #dceaf5;
  font-size: clamp(65px, 8vw, 98px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.06em;
}
.age-card--live .age-number { color: rgba(255, 255, 255, .15); }

.card-copy { position: absolute; z-index: 1; right: 24px; bottom: 24px; left: 24px; }
.card-copy p { margin: 0 0 5px; color: var(--muted); font-size: 14px; font-weight: 700; }
.age-card--live .card-copy p { color: #b9daf4; }
.card-copy h3 { margin: 0 0 18px; font-size: 26px; }
.card-action {
  min-height: auto;
  color: var(--blue);
  border-bottom: 2px solid #a9d0ee;
  border-radius: 0;
  padding-bottom: 5px;
}
.age-card--live .card-action { color: var(--white); border-color: var(--orange); }

.notice {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  align-items: center;
  margin-top: 24px;
  padding: 19px 22px;
  border-left: 4px solid var(--orange);
  background: var(--white);
  box-shadow: 0 4px 18px rgba(16, 42, 67, .05);
}
.notice strong { font-size: 14px; }
.notice p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.coming-page {
  min-height: 100vh;
  color: var(--white);
  background:
    linear-gradient(100deg, rgba(4, 34, 65, .98), rgba(5, 50, 91, .78)),
    url("../u15/assets/share-cover.png") center / cover fixed no-repeat;
}
.coming-page .site-nav { width: min(980px, calc(100% - 48px)); }
.coming-main {
  width: min(980px, calc(100% - 48px));
  margin: 0 auto;
  padding: 90px 0;
}
.coming-tag {
  display: inline-flex;
  padding: 7px 10px;
  border-radius: 4px;
  color: #baf2df;
  background: rgba(15, 157, 114, .2);
  font-size: 12px;
  font-weight: 800;
}
.coming-age {
  margin: 26px 0 8px;
  color: rgba(255, 255, 255, .18);
  font-size: clamp(92px, 18vw, 180px);
  font-weight: 900;
  line-height: .85;
  letter-spacing: -.07em;
}
.coming-main h1 { margin: 0; font-size: clamp(34px, 5vw, 54px); }
.coming-location { margin: 16px 0 0; color: #b9daf4; font-size: 18px; }
.coming-copy { max-width: 580px; margin: 28px 0; color: rgba(255, 255, 255, .76); line-height: 1.8; }
.back-link { padding: 0 18px; color: var(--navy); background: var(--orange); }

@media (max-width: 820px) {
  .landing-hero { min-height: 540px; background-position: 62% center; }
  .age-grid { grid-template-columns: 1fr; }
  .age-card { min-height: 290px; }
  .age-number { margin-top: 24px; font-size: 78px; }
}

@media (max-width: 620px) {
  .site-nav,
  .hero-content,
  .age-section,
  .site-footer,
  .coming-page .site-nav,
  .coming-main { width: min(100% - 28px, 1180px); }
  .site-nav { min-height: 70px; }
  .brand { font-size: 14px; }
  .brand-mark { width: 47px; height: 28px; }
  .nav-label { display: none; }
  .hero-content { padding: 76px 0 94px; }
  .hero-content h1 { font-size: 44px; }
  .hero-description { font-size: 15px; }
  .age-section { padding: 50px 0; }
  .section-intro { display: block; }
  .section-intro > p { margin-top: 14px; font-size: 14px; }
  .age-card { min-height: 275px; padding: 20px; }
  .card-copy { right: 20px; bottom: 20px; left: 20px; }
  .notice { grid-template-columns: 1fr; gap: 5px; }
  .site-footer { display: grid; gap: 8px; }
  .coming-main { padding: 72px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .age-card { transition: none; }
}