:root {
  color-scheme: light dark;
  --bg: #f6f2ea;
  --surface: rgba(255, 255, 255, 0.34);
  --logo-surface: #f0e4bf;
  --text: #202020;
  --muted: #74706a;
  --line: rgba(32, 32, 32, 0.12);
  --accent: #d99a58;
  --shadow: 0 24px 60px rgba(61, 46, 30, 0.08);
}

* { box-sizing: border-box; }

html { min-height: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 18%, rgba(255,255,255,.75), transparent 35%),
    radial-gradient(circle at 86% 82%, rgba(217,154,88,.10), transparent 28%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.page-shell {
  width: min(1120px, calc(100% - 48px));
  min-height: 100vh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.hero {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(300px, .9fr) minmax(360px, 1.1fr);
  align-items: center;
  gap: clamp(48px, 8vw, 110px);
  padding: 72px 0 56px;
}

.brand-mark-wrap {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid rgba(80, 60, 30, 0.12);
  border-radius: 42px;
  background: var(--logo-surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.brand-mark {
  width: 84%;
  height: 84%;
  object-fit: contain;
  display: block;
}

.hero-copy { max-width: 590px; }

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .02em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(217,154,88,.12);
}

.eyebrow {
  margin: 28px 0 14px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(68px, 9vw, 118px);
  line-height: .9;
  font-weight: 500;
  letter-spacing: -.055em;
}

.tagline {
  margin: 26px 0 0;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.18;
  letter-spacing: -.025em;
}

.intro {
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.coming {
  margin: 30px 0 0;
  font-size: 14px;
  color: var(--text);
}

.footer {
  min-height: 82px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .04em;
}

.footer-note { text-align: right; }

@media (max-width: 820px) {
  .page-shell { width: min(640px, calc(100% - 32px)); }
  .hero {
    grid-template-columns: 1fr;
    gap: 38px;
    padding: 34px 0 48px;
  }
  .brand-mark-wrap {
    width: min(100%, 460px);
    justify-self: center;
    border-radius: 32px;
  }
  .hero-copy { max-width: none; }
  h1 { font-size: clamp(68px, 20vw, 96px); }
  .intro br { display: none; }
}

@media (max-width: 520px) {
  .page-shell { width: min(100% - 24px, 520px); }
  .brand-mark-wrap { border-radius: 26px; }
  .hero { padding-top: 20px; }
  .footer {
    padding: 22px 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }
  .footer-note { text-align: left; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151515;
    --surface: rgba(255,255,255,.035);
    --logo-surface: #f0e4bf;
    --text: #f1eee8;
    --muted: #a6a19a;
    --line: rgba(255,255,255,.10);
    --accent: #e0a15e;
    --shadow: 0 24px 60px rgba(0,0,0,.22);
  }

  body {
    background:
      radial-gradient(circle at 20% 18%, rgba(255,255,255,.035), transparent 35%),
      radial-gradient(circle at 86% 82%, rgba(224,161,94,.06), transparent 28%),
      var(--bg);
  }

  .brand-mark-wrap {
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .brand-mark-wrap {
    animation:
      enter .7s ease both,
      sky-cycle 34s linear infinite;
  }
  .hero-copy {
    animation: enter .7s ease both;
    animation-delay: .08s;
  }

  @keyframes enter {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* 暖黄白天 → 金夕 → 深蓝夜晚 → 黎明（靛 → 藕紫 → 桃金）→ 回昼 */
  @keyframes sky-cycle {
    0%, 100% {
      background-color: #f0e4bf;
      border-color: rgba(80, 60, 30, 0.12);
    }
    12% {
      background-color: #e8c98a;
      border-color: rgba(100, 70, 30, 0.14);
    }
    24% {
      background-color: #9aa8c4;
      border-color: rgba(40, 50, 80, 0.16);
    }
    36% {
      background-color: #243552;
      border-color: rgba(180, 200, 230, 0.12);
    }
    48% {
      background-color: #162238;
      border-color: rgba(180, 200, 230, 0.10);
    }
    /* 黎明：先提亮冷调，再慢慢染暖，避免直接跳到土黄 */
    58% {
      background-color: #1e2c4a;
      border-color: rgba(160, 180, 220, 0.12);
    }
    66% {
      background-color: #3d4a72;
      border-color: rgba(140, 150, 200, 0.14);
    }
    74% {
      background-color: #6e6d9a;
      border-color: rgba(120, 100, 140, 0.14);
    }
    82% {
      background-color: #b89898;
      border-color: rgba(100, 70, 80, 0.12);
    }
    90% {
      background-color: #e0c4a0;
      border-color: rgba(100, 70, 40, 0.12);
    }
  }
}