@import url("https://fonts.googleapis.com/css2?family=Cormorant+Garamond:wght@500;600;700&family=Outfit:wght@400;500;600;700&display=swap");

:root {
  --ink: #3a3228;
  --muted: #8a7d6b;
  --line: #e8dfd0;
  --canvas: #fdfbf7;
  --paper: #fffefb;
  --gold: #c9a227;
  --gold-deep: #a8861a;
  --gold-soft: #f7f0de;
  --gold-glow: rgba(201, 162, 39, 0.22);
  --cream: #f5efe3;
  --tan: #ebe2d2;
  --header-ink: #fffaf0;
  --header-muted: #f0e2c0;
  --topbar-h: 56px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Outfit, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  background-color: var(--canvas);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -5%, rgba(255, 248, 220, 0.95), transparent 55%),
    radial-gradient(ellipse 45% 40% at 0% 30%, rgba(232, 210, 150, 0.18), transparent 50%),
    radial-gradient(ellipse 40% 35% at 100% 60%, rgba(212, 175, 55, 0.1), transparent 50%),
    linear-gradient(180deg, #fff9ef 0%, var(--canvas) 28%, #f6f0e6 100%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px 64px;
}

/* —— Top bar —— */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 -28px 0;
  padding: 14px 28px;
  min-height: var(--topbar-h);
  background: rgba(253, 251, 247, 0.88);
  border-bottom: 1px solid rgba(201, 162, 39, 0.28);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.topbar a {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
}

.topbar a:hover,
.topbar a:focus-visible {
  color: var(--gold-deep);
  outline: none;
}

.topbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink) !important;
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.topbar-brand::before {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f0d878, var(--gold-deep));
  box-shadow: 0 0 0 3px var(--gold-glow), 0 0 12px rgba(201, 162, 39, 0.35);
  content: "";
}

.topbar-home {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  color: var(--gold-deep) !important;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.topbar-home:hover,
.topbar-home:focus-visible {
  background: var(--gold-soft);
  border-color: var(--gold);
}

/* —— Hero —— */
header.hero {
  position: relative;
  overflow: hidden;
  margin: 36px 0 28px;
  padding: 52px 48px 48px;
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(90, 68, 32, 0.88) 0%, rgba(140, 108, 42, 0.9) 42%, rgba(180, 142, 55, 0.85) 100%),
    radial-gradient(ellipse at 85% 15%, rgba(255, 236, 170, 0.45), transparent 45%);
  color: var(--header-ink);
  box-shadow:
    0 20px 50px rgba(120, 90, 30, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.18);
  text-align: center;
}

header.hero::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, transparent 30%, rgba(255, 250, 230, 0.12) 48%, transparent 62%),
    radial-gradient(ellipse 60% 80% at 50% 120%, rgba(255, 240, 200, 0.2), transparent 55%);
  content: "";
  pointer-events: none;
}

header.hero::after {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 120px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 236, 180, 0.7), transparent);
  transform: translateX(-50%);
  content: "";
}

header.hero > * {
  position: relative;
  z-index: 1;
}

.brand-label {
  display: inline-block;
  margin: 0 0 16px;
  padding: 5px 14px;
  border: 1px solid rgba(255, 236, 180, 0.4);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--header-muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

h1 {
  max-width: 720px;
  margin: 0 auto 14px;
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.2;
  color: #fffaf0;
  text-shadow: 0 2px 24px rgba(80, 50, 10, 0.25);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.meta {
  margin: 0;
  color: var(--header-muted);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* —— Layout —— */
.layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

/* —— TOC (desktop sidebar) —— */
.toc {
  position: sticky;
  top: calc(var(--topbar-h) + 16px);
  z-index: 10;
  margin: 0;
  padding: 22px 18px;
  border: 1px solid rgba(201, 162, 39, 0.22);
  border-radius: 20px;
  background: rgba(255, 254, 251, 0.78);
  box-shadow: 0 8px 28px rgba(120, 90, 40, 0.05);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.toc > summary {
  display: block;
  margin: 0 0 12px;
  padding: 0 8px 10px;
  border-bottom: 1px solid var(--line);
  color: var(--gold-deep);
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  list-style: none;
  cursor: default;
  user-select: none;
}

.toc > summary::-webkit-details-marker {
  display: none;
}

.toc > summary::marker {
  content: "";
}

.toc nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc nav a {
  display: block;
  padding: 8px 10px;
  border-radius: 10px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.toc nav a:hover,
.toc nav a:focus-visible {
  background: var(--gold-soft);
  border-left-color: var(--gold);
  color: var(--gold-deep);
  outline: none;
}

article {
  max-width: none;
  margin: 0;
  padding: 40px 44px 48px;
  border: 1px solid rgba(201, 162, 39, 0.18);
  border-radius: 24px;
  background: var(--paper);
  box-shadow: 0 12px 40px rgba(100, 75, 30, 0.06);
  min-width: 0;
}

section {
  padding: 0 0 32px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--topbar-h) + 24px);
}

section + section {
  padding-top: 36px;
}

section:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

h2 {
  margin: 0 0 16px;
  padding-bottom: 10px;
  background-image: linear-gradient(90deg, rgba(201, 162, 39, 0.45), transparent 60%);
  background-position: left bottom;
  background-size: 100% 1px;
  background-repeat: no-repeat;
  color: var(--ink);
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.3;
  word-wrap: break-word;
}

h2::before {
  display: inline-block;
  width: 6px;
  height: 18px;
  margin-right: 12px;
  margin-bottom: -2px;
  border-radius: 2px;
  background: linear-gradient(180deg, #f0d878, var(--gold-deep));
  vertical-align: middle;
  box-shadow: 0 0 10px var(--gold-glow);
  content: "";
}

h3 {
  margin: 28px 0 8px;
  color: #5c4a32;
  font-family: Outfit, sans-serif;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 14px;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

ul,
ol {
  margin: 0 0 16px;
  padding-left: 0;
  list-style: none;
}

li {
  position: relative;
  padding-left: 22px;
}

li::before {
  position: absolute;
  left: 2px;
  top: 0.65em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f0d878, var(--gold-deep));
  box-shadow: 0 0 0 3px var(--gold-glow);
  content: "";
}

li + li {
  margin-top: 8px;
}

.disclaimer {
  margin: 0 0 24px;
  padding: 14px 16px;
  border-left: 3px solid var(--gold);
  background: var(--gold-soft);
  color: #6b5420;
  font-size: 14px;
  border-radius: 0 12px 12px 0;
}

.note {
  margin: 22px 0 2px;
  padding: 18px 20px;
  border: 1px solid rgba(201, 162, 39, 0.28);
  border-left: 3px solid var(--gold);
  background: linear-gradient(135deg, #faf6eb 0%, #fffefb 100%);
  color: #5c4a28;
  border-radius: 0 14px 14px 0;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 20px 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fffcf7;
}

table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  background: transparent;
  font-size: 14px;
}

th,
td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

th {
  background: var(--gold-soft);
  color: var(--gold-deep);
  font-family: Outfit, sans-serif;
  font-weight: 600;
  letter-spacing: 0.02em;
}

tr:last-child td {
  border-bottom: 0;
}

a {
  color: var(--gold-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  word-break: break-word;
}

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

.page-footer {
  margin-top: 40px;
  padding: 22px 16px;
  border-top: 1px solid rgba(201, 162, 39, 0.22);
  border-radius: 16px;
  background: linear-gradient(180deg, transparent, var(--tan));
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  letter-spacing: 0.02em;
}

/* Desktop: keep TOC always expanded */
@media (min-width: 901px) {
  .toc > nav {
    display: flex !important;
  }

  .toc > summary {
    pointer-events: none;
    cursor: default;
  }

  .toc > summary::after {
    display: none;
  }
}

/* —— Tablet / Mobile —— */
@media (max-width: 900px) {
  :root {
    --topbar-h: 52px;
  }

  body {
    background-attachment: scroll;
  }

  .shell {
    padding: 0 16px 48px;
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    padding-bottom: max(48px, env(safe-area-inset-bottom));
  }

  .topbar {
    margin: 0 -16px 0;
    margin-left: calc(-1 * max(16px, env(safe-area-inset-left)));
    margin-right: calc(-1 * max(16px, env(safe-area-inset-right)));
    padding: 12px max(16px, env(safe-area-inset-right)) 12px max(16px, env(safe-area-inset-left));
  }

  header.hero {
    margin: 20px 0 16px;
    padding: 36px 20px 32px;
    border-radius: 20px;
  }

  .brand-label {
    margin-bottom: 12px;
    padding: 4px 12px;
    font-size: 10px;
  }

  .layout {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  /* Mobile TOC: collapsible panel */
  .toc {
    position: sticky;
    top: var(--topbar-h);
    padding: 0;
    border-radius: 14px;
    overflow: hidden;
  }

  .toc > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 0;
    padding: 14px 16px;
    border-bottom: 0;
    font-size: 13px;
    letter-spacing: 0.12em;
    cursor: pointer;
    pointer-events: auto;
    -webkit-tap-highlight-color: transparent;
  }

  .toc > summary::after {
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--gold-deep);
    border-bottom: 2px solid var(--gold-deep);
    transform: rotate(45deg);
    transition: transform 0.2s ease;
    content: "";
  }

  .toc[open] > summary {
    border-bottom: 1px solid var(--line);
  }

  .toc[open] > summary::after {
    transform: rotate(-135deg);
    margin-top: 4px;
  }

  .toc nav {
    padding: 8px 10px 12px;
    max-height: min(55vh, 360px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .toc nav a {
    padding: 11px 12px;
    border-left: 0;
    border-radius: 10px;
    font-size: 14px;
    line-height: 1.35;
  }

  .toc nav a:hover,
  .toc nav a:focus-visible {
    border-left-color: transparent;
  }

  article {
    padding: 28px 18px 36px;
    border-radius: 18px;
  }

  section {
    padding-bottom: 24px;
    scroll-margin-top: calc(var(--topbar-h) + 64px);
  }

  section + section {
    padding-top: 24px;
  }

  h2 {
    font-size: 22px;
  }

  h2::before {
    width: 4px;
    height: 16px;
    margin-right: 10px;
  }

  h3 {
    margin-top: 22px;
    font-size: 14px;
  }

  .note {
    padding: 14px 14px;
    font-size: 14px;
  }

  .table-wrap {
    margin: 16px -4px;
    border-radius: 12px;
  }

  table {
    font-size: 13px;
  }

  th,
  td {
    padding: 10px 12px;
  }

  .page-footer {
    margin-top: 28px;
    padding: 18px 12px;
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
    line-height: 1.75;
  }

  .topbar-brand {
    font-size: 17px;
    letter-spacing: 0.1em;
  }

  .topbar-home {
    padding: 5px 12px;
    font-size: 11px;
  }

  header.hero {
    margin: 16px 0 14px;
    padding: 28px 16px 26px;
    border-radius: 16px;
  }

  h1 {
    font-size: 26px;
    line-height: 1.25;
  }

  .meta {
    font-size: 13px;
  }

  article {
    padding: 24px 14px 32px;
    border-radius: 14px;
  }

  h2 {
    font-size: 20px;
  }

  .toc > summary {
    padding: 12px 14px;
  }

  .toc nav a {
    padding: 10px 10px;
    font-size: 13px;
  }
}

@media print {
  body {
    background: #fff;
    color: #000;
  }

  .shell {
    max-width: none;
    padding: 0;
  }

  .topbar,
  .toc {
    display: none;
  }

  header.hero {
    margin: 0 0 24px;
    padding: 0 0 16px;
    background: #fff;
    color: #000;
    border-radius: 0;
    border-bottom: 2px solid #000;
    box-shadow: none;
    text-align: left;
  }

  header.hero::before,
  header.hero::after {
    display: none;
  }

  .brand-label,
  .meta,
  h1 {
    color: #000;
    text-shadow: none;
  }

  .layout {
    display: block;
  }

  article {
    border: 0;
    box-shadow: none;
    padding: 0;
  }

  section {
    break-inside: avoid;
  }
}