/* Apple-inspired refinement layer for V01-V10 only. */
:root {
  color-scheme: light dark;
  --apple-bg-light: #f5f5f7;
  --apple-bg-dark: #000000;
  --apple-panel-light: rgba(255, 255, 255, .82);
  --apple-panel-dark: rgba(28, 28, 30, .76);
  --apple-panel-strong-light: #ffffff;
  --apple-panel-strong-dark: #1c1c1e;
  --apple-soft-light: #fbfbfd;
  --apple-soft-dark: #111113;
  --apple-text-light: #1d1d1f;
  --apple-text-dark: #f5f5f7;
  --apple-muted-light: #6e6e73;
  --apple-muted-dark: #a1a1a6;
  --apple-line-light: rgba(0, 0, 0, .11);
  --apple-line-dark: rgba(255, 255, 255, .14);
  --apple-shadow-light: 0 18px 50px rgba(0, 0, 0, .09);
  --apple-shadow-dark: 0 22px 58px rgba(0, 0, 0, .48);
  --radius: 18px;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei UI", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei UI", sans-serif;
  --content-width: 1680px;
}

body[data-version="v01"] { --version-accent: #0071e3; --version-accent-2: #64d2ff; }
body[data-version="v02"] { --version-accent: #248a3d; --version-accent-2: #30d158; }
body[data-version="v03"] { --version-accent: #0a84ff; --version-accent-2: #5e5ce6; }
body[data-version="v04"] { --version-accent: #a05a00; --version-accent-2: #ff9f0a; }
body[data-version="v05"] { --version-accent: #007aff; --version-accent-2: #00c7be; }
body[data-version="v06"] { --version-accent: #bf5af2; --version-accent-2: #ff375f; }
body[data-version="v07"] { --version-accent: #ff9f0a; --version-accent-2: #ff453a; }
body[data-version="v08"] { --version-accent: #0a84ff; --version-accent-2: #32d74b; }
body[data-version="v09"] { --version-accent: #8e8e93; --version-accent-2: #d1d1d6; }
body[data-version="v10"] { --version-accent: #64d2ff; --version-accent-2: #bf5af2; }

body.appearance-light {
  --page-bg: var(--apple-bg-light);
  --surface: var(--apple-panel-light);
  --surface-strong: var(--apple-panel-strong-light);
  --surface-soft: var(--apple-soft-light);
  --text: var(--apple-text-light);
  --muted: var(--apple-muted-light);
  --line: var(--apple-line-light);
  --accent: var(--version-accent);
  --accent-2: var(--version-accent-2);
  --accent-3: #86868b;
  --shadow: var(--apple-shadow-light);
  color-scheme: light;
}

body.appearance-dark {
  --page-bg: var(--apple-bg-dark);
  --surface: var(--apple-panel-dark);
  --surface-strong: var(--apple-panel-strong-dark);
  --surface-soft: var(--apple-soft-dark);
  --text: var(--apple-text-dark);
  --muted: var(--apple-muted-dark);
  --line: var(--apple-line-dark);
  --accent: var(--version-accent-2);
  --accent-2: var(--version-accent);
  --accent-3: #8e8e93;
  --shadow: var(--apple-shadow-dark);
  color-scheme: dark;
}

html { scroll-padding-top: 150px; }

body {
  background:
    radial-gradient(circle at 50% -10%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 36%),
    var(--page-bg) !important;
  font-family: var(--font-body);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.progress span { background: var(--accent); }

.appbar {
  min-height: 64px;
  padding: 12px clamp(18px, 4vw, 56px);
  background: color-mix(in srgb, var(--surface) 88%, transparent) !important;
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(180%) blur(22px);
}

.brand { font-weight: 700; letter-spacing: 0; }

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-color: color-mix(in srgb, var(--accent) 42%, var(--line));
}

.action-btn,
.appearance-btn,
.section-link,
.result-item {
  border-radius: 999px;
}

.action-btn,
.appearance-btn {
  min-height: 34px;
  padding: 7px 13px;
  background: color-mix(in srgb, var(--surface-strong) 78%, transparent);
  border-color: var(--line);
  color: var(--text);
}

.action-btn:hover,
.appearance-btn:hover {
  transform: none;
  background: color-mix(in srgb, var(--accent) 9%, var(--surface-strong));
}

.appearance-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-strong) 72%, transparent);
}

.appearance-btn {
  border: 0;
  min-height: 28px;
  padding: 5px 10px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.appearance-btn.is-active {
  color: var(--text);
  background: var(--surface-strong);
  box-shadow: 0 1px 8px rgba(0, 0, 0, .08);
}

.appearance-note {
  color: var(--muted);
  font-size: 12px;
  margin-left: 2px;
}

.hero {
  min-height: min(760px, calc(100vh - 64px));
  align-items: center;
  padding: clamp(60px, 9vw, 132px) clamp(20px, 5vw, 76px);
  border-bottom: 0 !important;
  background: var(--page-bg);
}

.hero::after {
  background:
    linear-gradient(90deg, var(--page-bg) 0%, color-mix(in srgb, var(--page-bg) 84%, transparent) 43%, color-mix(in srgb, var(--page-bg) 18%, transparent) 100%) !important;
}

.hero-visual img {
  filter: saturate(1.02) contrast(1.02) !important;
  opacity: .72;
  transform: scale(1.01);
}

.appearance-dark .hero-visual img { opacity: .58; }

.hero-content {
  max-width: 1040px;
}

.hero-kicker {
  color: var(--accent);
  font-weight: 700;
  font-size: 15px;
}

.hero-title {
  max-width: 980px !important;
  font-weight: 700;
  font-size: clamp(48px, 7.5vw, 112px) !important;
  line-height: .96;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.45;
}

.meta-pill {
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface-strong) 58%, transparent);
  backdrop-filter: blur(18px);
}

.search-dock {
  top: 64px;
  z-index: 62;
  padding: 14px clamp(18px, 4vw, 56px);
  background: color-mix(in srgb, var(--page-bg) 76%, transparent);
  backdrop-filter: saturate(180%) blur(24px);
  border-bottom: 1px solid var(--line);
}

.search-panel {
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: none;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(20px);
}

.search-input {
  border: 0;
  border-radius: 15px;
  background: var(--surface-strong);
  min-height: 48px;
}

.search-input:focus {
  border-color: transparent;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
}

.search-status {
  color: var(--muted);
  min-width: 88px;
}

.filter-toggle {
  border: 1px solid var(--line);
  border-radius: 999px;
  min-height: 34px;
  padding: 5px 11px;
}

.insight-panel.compact-insight {
  position: static;
  width: min(var(--content-width), calc(100% - 36px));
  max-width: var(--content-width);
  max-height: none;
  margin: 10px auto 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
}

.compact-insight .panel-title {
  display: none;
}

.compact-insight .mini-stats {
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 10px;
  padding: 0;
  margin: 0 0 10px;
}

.compact-insight .mini-stat {
  min-height: 64px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 74%, transparent);
  backdrop-filter: blur(14px);
}

.compact-insight .mini-stat strong {
  font-size: 20px;
  margin-bottom: 4px;
}

.compact-insight .result-list {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 0 0 2px;
  scrollbar-width: thin;
}

.compact-insight .result-item {
  flex: 0 0 min(360px, 82vw);
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  backdrop-filter: blur(14px);
}

.compact-insight .empty-state {
  padding: 8px 2px;
}

.asset-strip {
  max-width: var(--content-width);
  margin: 64px auto 0;
  padding: 0 clamp(18px, 4vw, 56px);
  display: block;
}

.asset-strip::before { content: none; }

.asset-carousel-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.asset-eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-weight: 700;
  font-size: 15px;
}

.asset-carousel-head h2 {
  margin: 0;
  max-width: 780px;
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.asset-gallery {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, .82fr);
  gap: clamp(14px, 2vw, 24px);
  align-items: stretch;
}

.asset-card {
  border: 1px solid var(--line);
  border-radius: 30px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  cursor: zoom-in;
  transition: border-color .24s ease, transform .24s ease;
}

.asset-card:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}

.asset-card img {
  aspect-ratio: 16 / 9;
  padding: 0;
  object-fit: cover;
  background: var(--surface-soft);
}

.asset-card.is-featured {
  grid-row: span 2;
}

.asset-card.is-featured img {
  min-height: clamp(420px, 44vw, 680px);
}

.asset-card:not(.is-featured) img {
  min-height: clamp(190px, 19vw, 300px);
}

.asset-caption {
  display: grid;
  gap: 5px;
  padding: 18px 22px 22px;
  font-size: 15px;
  line-height: 1.55;
}

.asset-caption strong {
  color: var(--text);
  font-size: 18px;
}

.asset-caption span {
  color: var(--muted);
}

.asset-caption span::after {
  content: "  点击放大";
  color: var(--accent);
}

.layout {
  max-width: var(--content-width);
  grid-template-columns: minmax(230px, 300px) minmax(0, 1fr);
  gap: clamp(22px, 3vw, 42px);
  margin-top: 54px;
}

.toc-panel {
  top: 158px;
  border: 0;
  box-shadow: none;
  background: transparent;
  border-radius: 0;
}

.toc-panel .panel-title {
  color: var(--muted);
  padding-left: 10px;
  font-weight: 700;
}

.toc-list {
  padding: 0 0 14px;
}

.toc-list a {
  border-radius: 12px;
  font-size: 13px;
  padding: 8px 10px;
}

.toc-list .toc-h2 a {
  padding-left: 24px;
  font-size: 12px;
}

.toc-list a:hover,
.toc-list a.is-active {
  background: color-mix(in srgb, var(--accent) 11%, transparent);
  border-color: transparent;
}

.content-flow {
  gap: 18px;
}

.content-section {
  scroll-margin-top: 158px;
  border: 1px solid var(--line) !important;
  border-radius: 28px;
  background: color-mix(in srgb, var(--surface) 92%, transparent) !important;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.content-section h2 {
  font-size: clamp(30px, 4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.018em;
}

.content-section h3 {
  scroll-margin-top: 158px;
  margin-top: 54px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  font-weight: 700;
}

.content-section h2 + h3,
.content-section .section-eyebrow + h2 + h3 {
  margin-top: 26px;
  padding-top: 0;
  border-top: 0;
}

.section-number {
  border: 0;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.doc-paragraph,
.doc-list {
  font-size: 17px;
  line-height: 1.82;
}

.doc-list-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding-left: 0;
  list-style: none;
  margin: 22px 0 28px;
}

.doc-list-cards li {
  position: relative;
  margin: 0;
  padding: 16px 16px 16px 44px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface-strong) 72%, transparent);
  line-height: 1.62;
}

.doc-list-cards li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 23px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent) 13%, transparent);
}

ol.doc-list-cards {
  counter-reset: guide-list;
}

ol.doc-list-cards li {
  counter-increment: guide-list;
}

ol.doc-list-cards li::before {
  content: counter(guide-list);
  top: 15px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  color: var(--surface-strong);
  font-size: 12px;
  font-weight: 800;
  box-shadow: none;
}

.table-wrap {
  border-radius: 18px;
  background: var(--surface-strong);
}

.block-table {
  font-size: 14px;
}

.block-table th {
  background: color-mix(in srgb, var(--text) 92%, var(--surface-strong)) !important;
  color: var(--page-bg) !important;
}

.appearance-dark .block-table th {
  background: color-mix(in srgb, var(--text) 88%, #ffffff) !important;
  color: #050505 !important;
}

.callout {
  border-radius: 18px;
  background: color-mix(in srgb, var(--accent) 9%, var(--surface-strong));
}

.backtop {
  border-radius: 50%;
  backdrop-filter: blur(18px);
}

.image-viewer {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: none;
  padding: 28px;
  background: color-mix(in srgb, #000 72%, transparent);
  backdrop-filter: blur(20px);
}

.image-viewer.is-open {
  display: grid;
  place-items: center;
}

.image-viewer-panel {
  width: min(1280px, 96vw);
  max-height: 92vh;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 14px;
  padding: 16px;
  border-radius: 28px;
  background: var(--surface-strong);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .45);
}

.image-viewer-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
}

.image-viewer-title {
  margin: 0;
  font-weight: 700;
}

.image-viewer img {
  width: 100%;
  height: 100%;
  max-height: 74vh;
  object-fit: contain;
  border-radius: 18px;
  background: var(--surface-soft);
}

.image-viewer-caption {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.text-large .doc-paragraph,
.text-large .doc-list,
.text-large .block-table {
  font-size: 19px;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .toc-panel {
    position: static;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    padding: 4px;
  }

  .toc-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px;
    padding: 0 10px 12px;
  }
}

@media (max-width: 900px) {
  .search-panel {
    grid-template-columns: 1fr;
  }

  .search-status {
    text-align: left;
  }

  .compact-insight .mini-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .asset-strip {
    margin-top: 34px;
  }

  .asset-carousel-head {
    align-items: start;
    flex-direction: column;
  }

  .asset-gallery {
    grid-template-columns: 1fr;
  }

  .asset-card.is-featured {
    grid-row: auto;
  }

  .asset-card.is-featured img,
  .asset-card:not(.is-featured) img {
    min-height: auto;
  }

  .doc-list-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 210px; }

  .appbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .search-dock {
    top: 118px;
    padding-inline: 12px;
  }

  .hero {
    min-height: 620px;
  }

  .hero-title {
    font-size: clamp(42px, 13vw, 72px) !important;
  }

  .layout {
    padding-inline: 12px;
  }

  .content-section,
  .content-section h3 {
    scroll-margin-top: 212px;
  }

  .toc-list {
    grid-template-columns: 1fr;
  }
}

@media print {
  .appearance-switch,
  .image-viewer,
  .compact-insight {
    display: none !important;
  }
}