:root {
  color-scheme: light dark;
  --bg: #f6f8fc;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --text: #111827;
  --muted: #647084;
  --line: #e1e6ef;
  --primary: #3158ea;
  --primary-soft: #edf1ff;
  --accent: #ff705c;
  --shadow: 0 18px 60px rgba(28, 45, 94, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f14;
    --surface: rgba(24, 27, 34, 0.94);
    --surface-strong: #181b22;
    --text: #f5f7fb;
    --muted: #a8b0c0;
    --line: #2b303a;
    --primary: #6e8cff;
    --primary-soft: #202a50;
    --accent: #ff816f;
    --shadow: 0 18px 60px rgba(0, 0, 0, 0.24);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 14% -8%, rgba(49, 88, 234, 0.13), transparent 34rem),
    radial-gradient(circle at 92% 6%, rgba(255, 112, 92, 0.08), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "HarmonyOS Sans SC", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a { color: var(--primary); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

.shell {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0 72px;
}

.hero, .card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 42px;
  border-radius: 28px;
}

.hero::after {
  content: "";
  position: absolute;
  right: -50px;
  bottom: -80px;
  width: 230px;
  height: 230px;
  border: 42px solid var(--primary-soft);
  border-radius: 50%;
  opacity: 0.65;
}

.brand {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  font-size: 20px;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.mark { width: 54px; height: 35px; flex: 0 0 auto; }
.eyebrow { position: relative; z-index: 1; margin: 0 0 8px; color: var(--primary); font-size: 14px; font-weight: 700; letter-spacing: 0.12em; }

h1 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: clamp(34px, 7vw, 54px);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.summary { position: relative; z-index: 1; max-width: 660px; margin: 18px 0 0; color: var(--muted); font-size: 17px; }
.meta { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 24px; color: var(--muted); font-size: 14px; }

.notice {
  margin: 22px 0;
  padding: 18px 20px;
  border: 1px solid color-mix(in srgb, var(--primary) 28%, var(--line));
  border-radius: 18px;
  background: var(--primary-soft);
}

.card { margin-top: 18px; padding: 32px 36px; border-radius: 24px; }
h2 { margin: 0 0 16px; font-size: 23px; line-height: 1.35; }
h3 { margin: 24px 0 10px; font-size: 18px; }
p { margin: 10px 0; }
ul, ol { margin: 10px 0; padding-left: 1.4em; }
li + li { margin-top: 8px; }

.table-wrap { overflow-x: auto; margin: 18px 0; }
table { width: 100%; min-width: 650px; border-collapse: collapse; font-size: 15px; }
th, td { padding: 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--primary-soft); font-weight: 700; }

.link-card {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-strong);
  text-decoration: none;
}

.link-card strong { display: block; color: var(--text); }
.link-card span { color: var(--muted); }
.arrow { color: var(--primary) !important; font-size: 22px; }
footer { padding: 28px 10px 0; color: var(--muted); text-align: center; font-size: 14px; }

@media (max-width: 640px) {
  .shell { width: min(100% - 20px, 900px); padding-top: 10px; }
  .hero { padding: 28px 24px; border-radius: 22px; }
  .card { padding: 26px 22px; border-radius: 20px; }
  .summary { font-size: 16px; }
}