:root {
  color-scheme: light;
  --paper: #f7f3eb;
  --ink: #27231f;
  --muted: #756f66;
  --line: #ded4c5;
  --panel: #fffaf0;
  --panel-strong: #f1e5d2;
  --accent: #9a4f31;
  --accent-deep: #5e3325;
  --green: #2f6f63;
  --shadow: 0 24px 70px rgba(74, 54, 32, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    radial-gradient(circle at 10% 8%, rgba(154, 79, 49, 0.12), transparent 34rem),
    radial-gradient(circle at 88% 12%, rgba(47, 111, 99, 0.11), transparent 31rem),
    linear-gradient(135deg, #fbf6ed 0%, var(--paper) 48%, #efe4d5 100%);
}

body {
  margin: 0;
  color: var(--ink);
  font-family: ui-serif, "Songti SC", "Noto Serif CJK SC", Georgia, serif;
  font-size: 17px;
  line-height: 1.76;
  letter-spacing: 0;
}

a {
  color: var(--accent-deep);
  text-decoration-color: rgba(154, 79, 49, 0.42);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent);
}

.site-shell {
  width: min(100%, 1040px);
  margin: 0 auto;
  padding: 32px 20px 72px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 0 36px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(94, 51, 37, 0.24);
  border-radius: 8px;
  background: linear-gradient(145deg, #fff7e8, #e6d2b8);
  box-shadow: 0 10px 24px rgba(94, 51, 37, 0.14);
  color: var(--accent-deep);
  font-weight: 800;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-title {
  font-size: 17px;
  font-weight: 800;
}

.brand-subtitle {
  color: var(--muted);
  font-family: ui-sans-serif, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 12px;
  font-weight: 650;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  font-family: ui-sans-serif, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 14px;
  font-weight: 700;
}

.nav a {
  min-height: 34px;
  padding: 5px 10px;
  border: 1px solid rgba(94, 51, 37, 0.18);
  border-radius: 8px;
  background: rgba(255, 250, 240, 0.62);
  text-decoration: none;
}

.hero,
.document {
  border: 1px solid rgba(94, 51, 37, 0.16);
  border-radius: 8px;
  background: rgba(255, 250, 240, 0.82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  padding: clamp(30px, 6vw, 64px);
  overflow: hidden;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-deep);
  font-family: ui-sans-serif, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 13px;
  font-weight: 800;
}

h1 {
  max-width: 14ch;
  margin: 0;
  font-size: clamp(44px, 8vw, 82px);
  line-height: 0.98;
  letter-spacing: 0;
}

.lead {
  max-width: 760px;
  margin: 24px 0 0;
  color: #4d443b;
  font-size: clamp(18px, 2.3vw, 22px);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.link-card {
  min-height: 168px;
  padding: 20px;
  border: 1px solid rgba(94, 51, 37, 0.14);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.48), rgba(241, 229, 210, 0.58));
  text-decoration: none;
}

.link-card strong {
  display: block;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.25;
}

.link-card span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-family: ui-sans-serif, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 14px;
  line-height: 1.62;
}

.document {
  padding: clamp(26px, 5vw, 58px);
}

.document h1 {
  max-width: 18ch;
  font-size: clamp(36px, 5vw, 60px);
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 34px;
  color: var(--muted);
  font-family: ui-sans-serif, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 13px;
  font-weight: 650;
}

.meta span {
  padding: 5px 9px;
  border: 1px solid rgba(94, 51, 37, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.42);
}

.summary {
  margin: 0 0 34px;
  padding: 18px 20px;
  border-left: 4px solid var(--green);
  background: rgba(47, 111, 99, 0.08);
  color: #33463f;
}

h2 {
  margin: 36px 0 12px;
  padding-top: 4px;
  font-size: 25px;
  line-height: 1.25;
}

h3 {
  margin: 24px 0 8px;
  font-size: 19px;
}

p,
ul,
ol {
  max-width: 790px;
}

ul,
ol {
  padding-left: 1.3em;
}

li + li {
  margin-top: 7px;
}

.table-wrap {
  max-width: 860px;
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-family: ui-sans-serif, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 14px;
  line-height: 1.62;
}

th,
td {
  padding: 12px;
  border: 1px solid rgba(94, 51, 37, 0.16);
  vertical-align: top;
  text-align: left;
}

th {
  background: rgba(241, 229, 210, 0.72);
  color: var(--accent-deep);
}

.support-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  max-width: 860px;
  margin-top: 20px;
}

.support-item {
  padding: 18px;
  border: 1px solid rgba(94, 51, 37, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.38);
}

.support-item strong {
  display: block;
  margin-bottom: 6px;
}

.footer {
  margin-top: 28px;
  color: var(--muted);
  font-family: ui-sans-serif, "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 13px;
}

@media (max-width: 760px) {
  .site-shell {
    padding: 18px 14px 48px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding-bottom: 22px;
  }

  .nav {
    justify-content: flex-start;
  }

  .link-grid,
  .support-list {
    grid-template-columns: 1fr;
  }

  .document,
  .hero {
    padding: 24px 18px;
  }
}