/* Global light / dark theme — Tencent Cloud inspired tech blue */

html[data-theme="light"] {
  color-scheme: light;
  --wa-bg: #f5f7fa;
  --wa-bg-elevated: #ffffff;
  --wa-paper: #ffffff;
  --wa-soft: #f5f7fa;
  --wa-ink: #1a2332;
  --wa-muted: #64748b;
  --wa-line: #e2e8f0;
  --wa-primary: #0052d9;
  --wa-primary-hover: #0062ff;
  --wa-on-primary: #ffffff;
  --wa-link: #0052d9;
  --wa-accent: #0052d9;
  --wa-warn-bg: #fffbeb;
  --wa-warn-ink: #92400e;
  --wa-warn-border: #fde68a;
  --wa-danger-bg: #fff1f2;
  --wa-danger-ink: #be123c;
  --wa-danger-border: #fecdd3;
  --wa-success-bg: #ecfdf5;
  --wa-success-ink: #047857;
  --wa-success-border: #a7f3d0;
  --wa-code-bg: #f1f5f9;
  --wa-prose-quote-bg: #eff6ff;
  --wa-prose-quote-ink: #1e3a8a;
  --wa-pre-bg: #0f172a;
  --wa-pre-ink: #e2e8f0;
  --wa-hero-from: #eef5ff;
  --wa-hero-to: #d6e8ff;
  --wa-card: #ffffff;
  --wa-shadow: 0 8px 28px rgba(0, 40, 100, 0.08);
  /* legacy aliases */
  --ink: var(--wa-ink);
  --muted: var(--wa-muted);
  --line: var(--wa-line);
  --soft: var(--wa-soft);
  --paper: var(--wa-paper);
  --sidebar: #ffffff;
  --sidebar-2: #f5f8fc;
  --sidebar-text: #1a2332;
  --sidebar-muted: #64748b;
  --sidebar-link: #334155;
  --sidebar-hover: rgba(0, 82, 217, 0.06);
  --sidebar-active-bg: linear-gradient(90deg, rgba(0, 82, 217, 0.1), rgba(38, 111, 232, 0.06));
  --sidebar-active-border: rgba(0, 82, 217, 0.28);
  --sidebar-border: rgba(15, 23, 42, 0.08);
  --accent: #3b82f6;
  --accent-2: #0052d9;
  --blue: var(--wa-primary);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --wa-bg: #0b1220;
  --wa-bg-elevated: #121a2b;
  --wa-paper: #151e32;
  --wa-soft: #0b1220;
  --wa-ink: #e8eef7;
  --wa-muted: #9aa8bc;
  --wa-line: #243044;
  --wa-primary: #4787f0;
  --wa-primary-hover: #69a1ff;
  --wa-on-primary: #ffffff;
  --wa-link: #69a1ff;
  --wa-accent: #4787f0;
  --wa-warn-bg: rgba(120, 53, 15, 0.35);
  --wa-warn-ink: #fde68a;
  --wa-warn-border: rgba(245, 158, 11, 0.35);
  --wa-danger-bg: rgba(159, 18, 57, 0.28);
  --wa-danger-ink: #fecdd3;
  --wa-danger-border: rgba(251, 113, 133, 0.4);
  --wa-success-bg: rgba(6, 95, 70, 0.3);
  --wa-success-ink: #a7f3d0;
  --wa-success-border: rgba(52, 211, 153, 0.4);
  --wa-code-bg: rgba(255, 255, 255, 0.08);
  --wa-prose-quote-bg: rgba(71, 135, 240, 0.12);
  --wa-prose-quote-ink: var(--wa-ink);
  --wa-pre-bg: #070d18;
  --wa-pre-ink: #e2e8f0;
  --wa-hero-from: #0f1a2e;
  --wa-hero-to: #16325c;
  --wa-card: #151e32;
  --wa-shadow: 0 10px 32px rgba(0, 0, 0, 0.35);
  /* legacy aliases */
  --ink: var(--wa-ink);
  --muted: var(--wa-muted);
  --line: var(--wa-line);
  --soft: var(--wa-soft);
  --paper: var(--wa-paper);
  --sidebar: #070d18;
  --sidebar-2: #101a2c;
  --sidebar-text: #f8fafc;
  --sidebar-muted: #94a3b8;
  --sidebar-link: #cbd5e1;
  --sidebar-hover: rgba(255, 255, 255, 0.06);
  --sidebar-active-bg: linear-gradient(90deg, rgba(71, 135, 240, 0.22), rgba(96, 165, 250, 0.1));
  --sidebar-active-border: rgba(71, 135, 240, 0.35);
  --sidebar-border: rgba(255, 255, 255, 0.08);
  --accent: #60a5fa;
  --accent-2: #4787f0;
  --blue: var(--wa-primary);
}

/* Neutral reading pack: slate primary + teal links; visibly distinct from tech blue */
html[data-theme="light"][data-brand="neutral"] {
  --wa-primary: #334155;
  --wa-primary-hover: #1e293b;
  --wa-on-primary: #ffffff;
  --wa-link: #0f766e;
  --wa-accent: #0f766e;
  --wa-hero-from: #f4f4f5;
  --wa-hero-to: #e4e4e7;
  --wa-prose-quote-bg: #f0fdfa;
  --wa-prose-quote-ink: #134e4a;
  --wa-shadow: 0 8px 28px rgba(15, 23, 42, 0.08);
  --sidebar-hover: rgba(15, 118, 110, 0.08);
  --sidebar-active-bg: linear-gradient(90deg, rgba(15, 118, 110, 0.14), rgba(51, 65, 85, 0.06));
  --sidebar-active-border: rgba(15, 118, 110, 0.4);
  --accent: #0f766e;
  --accent-2: #334155;
  --blue: var(--wa-primary);
}

html[data-theme="dark"][data-brand="neutral"] {
  --wa-primary: #475569;
  --wa-primary-hover: #64748b;
  --wa-on-primary: #ffffff;
  --wa-link: #5eead4;
  --wa-accent: #5eead4;
  --wa-hero-from: #12151c;
  --wa-hero-to: #1c2433;
  --wa-prose-quote-bg: rgba(45, 212, 191, 0.12);
  --wa-prose-quote-ink: #ccfbf1;
  --wa-shadow: 0 10px 32px rgba(0, 0, 0, 0.4);
  --sidebar-hover: rgba(94, 234, 212, 0.08);
  --sidebar-active-bg: linear-gradient(90deg, rgba(94, 234, 212, 0.18), rgba(100, 116, 139, 0.1));
  --sidebar-active-border: rgba(94, 234, 212, 0.35);
  --accent: #5eead4;
  --accent-2: #94a3b8;
  --blue: var(--wa-primary);
}

/* —— App shell: global top nav + sidebar TOC only —— */
html.wa-has-app-nav {
  --wa-app-nav-h: 72px;
  /* 全站子页侧栏统一宽度，避免各 tab 左右跳动 */
  --sidebar-w: 280px;
}
.wa-app-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  flex: 0 0 auto;
  height: var(--wa-app-nav-h, 72px);
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 36px;
  padding: 0 40px;
  background: var(--wa-bg-elevated, #fff);
  border-bottom: 1px solid var(--wa-line, var(--line, #e2e8f0));
  overflow: visible;
}
html[data-theme="dark"] .wa-app-nav {
  background: var(--wa-bg-elevated, #121a2b);
  border-bottom-color: var(--wa-line, #243044);
}
.wa-app-logo {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 1.65rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--wa-ink, var(--ink, #1a2332));
  text-decoration: none;
  white-space: nowrap;
  flex: 0 0 auto;
}
.wa-app-logo em {
  font-style: italic;
  color: var(--wa-primary, #0052d9);
}
.wa-app-links {
  display: flex;
  align-items: stretch;
  gap: 8px;
  min-width: 0;
  flex: 1 1 auto;
  overflow: visible;
  align-self: stretch;
}
.wa-app-channel {
  position: relative;
  flex: 0 0 auto;
  align-self: stretch;
  display: flex;
  align-items: center;
}
.wa-app-channel-btn {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--wa-ink, var(--ink, #1a2332));
  font-size: 17px;
  font-weight: 750;
  letter-spacing: 0.04em;
  padding: 10px 16px;
  border-radius: 999px;
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}
.wa-app-channel-btn:hover,
.wa-app-channel.is-open .wa-app-channel-btn {
  color: var(--wa-primary, #0052d9);
  background: color-mix(in srgb, var(--wa-primary, #0052d9) 8%, transparent);
  text-decoration: none;
}
.wa-app-channel.active .wa-app-channel-btn {
  color: var(--wa-primary, #0052d9);
  background: color-mix(in srgb, var(--wa-primary, #0052d9) 12%, transparent);
  text-decoration: none;
}
.wa-app-mega {
  display: none;
  position: fixed;
  top: var(--wa-app-nav-h, 72px);
  left: 0;
  right: 0;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--wa-line, #e2e8f0);
  border-radius: 0;
  background: var(--wa-bg, #f5f7fa);
  box-shadow: 0 28px 56px rgba(15, 23, 42, 0.1);
  z-index: 80;
}
.wa-app-mega::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -16px;
  height: 16px;
}
.wa-app-channel.is-open .wa-app-mega,
.wa-app-channel:focus-within .wa-app-mega,
.wa-app-mega.is-open {
  display: block;
}
.wa-app-mega-inner {
  width: min(1100px, calc(100% - 80px));
  margin: 0 auto;
  padding: 18px 0 22px;
}
.wa-app-mega-kicker {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin: 0 0 14px;
}
.wa-app-mega-kicker span {
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--wa-muted, #64748b);
}
.wa-app-mega-kicker b {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 1.2rem;
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--wa-ink, #1a2332);
}
.wa-app-mega-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  align-items: stretch;
}
.wa-app-mega[data-count="2"] .wa-app-mega-rail,
.wa-app-mega[data-count="4"] .wa-app-mega-rail {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.wa-app-mega[data-count="4"] .wa-app-mega-rail,
.wa-app-mega[data-count="5"] .wa-app-mega-rail {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}
.wa-app-mega-tile {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 0;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--wa-bg-elevated, #fff);
  border: 1px solid var(--wa-line, #e2e8f0);
  text-decoration: none;
  color: var(--wa-ink, #1a2332);
  box-sizing: border-box;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.wa-app-mega-tile:hover {
  background: color-mix(in srgb, var(--wa-primary, #0052d9) 8%, var(--wa-bg-elevated, #fff));
  border-color: color-mix(in srgb, var(--wa-primary, #0052d9) 28%, var(--wa-line, #e2e8f0));
  text-decoration: none;
}
.wa-app-mega-tile.is-overview {
  background: color-mix(in srgb, var(--wa-primary, #0052d9) 12%, var(--wa-bg-elevated, #fff));
  border-color: color-mix(in srgb, var(--wa-primary, #0052d9) 32%, var(--wa-line, #e2e8f0));
  color: var(--wa-ink, #1a2332);
}
.wa-app-mega-tile.is-overview:hover {
  background: color-mix(in srgb, var(--wa-primary, #0052d9) 16%, var(--wa-bg-elevated, #fff));
}
.wa-app-mega-idx {
  margin-bottom: 10px;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.08em;
  color: var(--wa-muted, #64748b);
}
.wa-app-mega-tile.is-overview .wa-app-mega-idx {
  color: var(--wa-primary, #0052d9);
}
.wa-app-mega-title {
  display: block;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.wa-app-mega-tile.is-overview .wa-app-mega-title {
  font-size: 15px;
}
.wa-app-mega-desc {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.45;
  color: var(--wa-muted, #64748b);
}
.wa-app-mega-tile.is-overview .wa-app-mega-desc {
  color: var(--wa-muted, #64748b);
}
.wa-app-mega-tile.is-current {
  box-shadow: inset 0 0 0 1px var(--wa-primary, #0052d9);
}
.wa-app-mega-tile.is-disabled {
  opacity: 0.42;
  cursor: not-allowed;
}
html[data-theme="dark"] .wa-app-mega {
  background: var(--wa-bg, #0b1220);
  border-bottom-color: var(--wa-line, #243044);
  box-shadow: 0 28px 56px rgba(0, 0, 0, 0.35);
}
html[data-theme="dark"] .wa-app-channel-btn:hover,
html[data-theme="dark"] .wa-app-channel.is-open .wa-app-channel-btn,
html[data-theme="dark"] .wa-app-channel.active .wa-app-channel-btn {
  color: var(--wa-primary, #69a1ff);
  background: color-mix(in srgb, var(--wa-primary, #4787f0) 16%, transparent);
}
html[data-theme="dark"] .wa-app-mega-kicker b {
  color: var(--wa-ink, #e8eef7);
}
html[data-theme="dark"] .wa-app-mega-tile {
  background: var(--wa-bg-elevated, #121a2b);
  border-color: var(--wa-line, #243044);
  color: var(--wa-ink, #e8eef7);
}
html[data-theme="dark"] .wa-app-mega-tile:hover {
  background: color-mix(in srgb, var(--wa-primary, #4787f0) 12%, var(--wa-bg-elevated, #121a2b));
  border-color: color-mix(in srgb, var(--wa-primary, #4787f0) 40%, var(--wa-line, #243044));
}
html[data-theme="dark"] .wa-app-mega-tile.is-overview {
  background: color-mix(in srgb, var(--wa-primary, #4787f0) 16%, var(--wa-bg-elevated, #121a2b));
  border-color: color-mix(in srgb, var(--wa-primary, #4787f0) 42%, var(--wa-line, #243044));
}
.wa-app-links::-webkit-scrollbar { display: none; }
.wa-app-right {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  flex: 0 0 auto;
}
/* 管理员入口：放在右侧，不与产品 Tab 抢横向空间 */
a.wa-app-admin {
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--wa-muted, var(--muted, #64748b));
  font-size: 12.5px;
  font-weight: 650;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--wa-line, var(--line, #e2e8f0));
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
a.wa-app-admin:hover,
a.wa-app-admin.active {
  color: var(--wa-primary, #0052d9);
  background: rgba(0, 82, 217, 0.08);
  border-color: rgba(0, 82, 217, 0.28);
  text-decoration: none;
}
html[data-theme="dark"] a.wa-app-admin {
  color: var(--wa-ink, #e8eef7);
  border-color: rgba(255, 255, 255, 0.22);
}
html[data-theme="dark"] a.wa-app-admin:hover,
html[data-theme="dark"] a.wa-app-admin.active {
  background: rgba(71, 135, 240, 0.12);
  border-color: rgba(71, 135, 240, 0.35);
}

html.wa-has-app-nav .sidebar {
  top: var(--wa-app-nav-h) !important;
  height: calc(100vh - var(--wa-app-nav-h)) !important;
  bottom: auto !important;
  width: var(--sidebar-w) !important;
}
/* Top offset only — left gutter is desktop-only (@media min-width: 961px). */
html.wa-has-app-nav .main {
  margin-top: var(--wa-app-nav-h);
}
/* Community / about use <main> without the textbook .main shell. */
html.wa-has-app-nav main:not(.main) {
  margin-top: var(--wa-app-nav-h);
}
/* Short standalone pages: keep 备案 at the bottom of the viewport. */
html.wa-has-app-nav body:has(> main:not(.main)) {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
html.wa-has-app-nav body:has(> main:not(.main)) > main:not(.main) {
  flex: 1 1 auto;
}
html.wa-has-app-nav body:has(> main:not(.main)) > .wa-beian {
  margin-top: auto;
}
html.wa-has-app-nav .topbar {
  top: var(--wa-app-nav-h);
}
html.wa-has-app-nav body[data-wa-page="home"] {
  padding-top: var(--wa-app-nav-h, 72px);
}
.sidebar .brand h1 {
  display: flex !important;
  align-items: center;
  gap: 10px;
  margin: 0 !important;
  font-family: "DM Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif !important;
  font-size: 16px !important;
  font-weight: 750 !important;
  font-style: normal !important;
  letter-spacing: 0.01em;
  line-height: 1.2;
  color: var(--sidebar-text, #1a2332) !important;
}
.sidebar .brand .mark {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  margin: 0 !important;
  flex: 0 0 auto;
  color: #fff !important;
  background: linear-gradient(145deg, #3d7dff 0%, #0052d9 58%, #003eb8 100%) !important;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28), 0 6px 14px rgba(0, 82, 217, 0.28);
}
.sidebar .brand .mark[data-tone="cyan"] {
  background: linear-gradient(145deg, #3ec4ff 0%, #0077d4 100%) !important;
}
.sidebar .brand .mark[data-tone="teal"] {
  background: linear-gradient(145deg, #2fd3c4 0%, #0b7f86 100%) !important;
}
.sidebar .brand .mark[data-tone="indigo"] {
  background: linear-gradient(145deg, #7b8cff 0%, #3b4fd4 100%) !important;
}
.sidebar .brand .mark[data-tone="violet"] {
  background: linear-gradient(145deg, #9b7dff 0%, #5b3dc4 100%) !important;
}
.sidebar .brand .mark[data-tone="slate"] {
  background: linear-gradient(145deg, #6b8aa8 0%, #334e68 100%) !important;
}
.sidebar .brand .mark svg {
  width: 17px;
  height: 17px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.85;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.sidebar .brand .mark svg [data-fill] {
  fill: currentColor;
  stroke: none;
}
.sidebar .brand p {
  margin: 10px 0 0 !important;
  font-size: 12px !important;
  line-height: 1.5 !important;
  color: var(--sidebar-muted, #64748b) !important;
}
html.wa-has-app-nav .sidebar .hub[data-wa-hub-legacy] {
  display: none !important;
}
html.wa-has-app-nav .sidebar .hub[data-wa-keep-hub],
html.wa-admin-page .sidebar .hub,
html.wa-admin-page .sidebar .admin-tabs {
  display: block !important;
  visibility: visible !important;
}
html.wa-admin-page .sidebar .admin-tabs > a,
html.wa-admin-page .sidebar .hub[data-wa-keep-hub] > a {
  display: block !important;
}
html.wa-has-app-nav .backdrop {
  top: var(--wa-app-nav-h);
}

/* Desktop only: reserve sidebar gutter (never on phones). */
@media (min-width: 961px) {
  html.wa-has-app-nav .main,
  .layout > .main {
    margin-left: var(--sidebar-w) !important;
  }
  html.wa-sidebar-collapsed {
    --sidebar-w: 0px;
  }
  html.wa-sidebar-collapsed.wa-has-app-nav .sidebar,
  html.wa-sidebar-collapsed .layout > .sidebar,
  html.wa-sidebar-collapsed aside.sidebar {
    width: 280px !important;
    transform: translate3d(-100%, 0, 0);
    pointer-events: none;
  }
  html.wa-sidebar-ready.wa-has-app-nav .sidebar,
  html.wa-sidebar-ready .layout > .sidebar {
    transition: transform 0.22s ease;
  }
  html.wa-sidebar-ready.wa-has-app-nav .main,
  html.wa-sidebar-ready .layout > .main {
    transition: margin-left 0.22s ease;
  }
}

.wa-sidebar-toggle {
  display: none;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 6px 10px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--wa-muted, #64748b);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: none;
}
html.wa-has-app-nav .wa-sidebar-toggle:not([hidden]) {
  display: inline-flex;
}
.wa-sidebar-toggle:hover {
  color: var(--wa-primary, #0052d9);
  background: rgba(0, 82, 217, 0.06);
}
html.wa-sidebar-collapsed .wa-sidebar-toggle {
  color: var(--wa-ink, #1a2332);
}
.wa-sidebar-toggle svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
html[data-theme="dark"] .wa-sidebar-toggle {
  background: transparent;
  color: #94a3b8;
}
html[data-theme="dark"] .wa-sidebar-toggle:hover {
  color: #e8eef7;
  background: rgba(71, 135, 240, 0.12);
}
html[data-theme="dark"] .wa-sidebar-collapsed .wa-sidebar-toggle {
  color: #e8eef7;
}
@media (max-width: 960px) {
  .wa-sidebar-toggle {
    display: none !important;
  }
}

/* —— Mobile shell (≤960px): overlay drawer; main stays full width ——
   Critical: page CSS uses `margin-left: var(--sidebar-w)`. On narrow screens we
   MUST zero --sidebar-w (not enlarge it), and use --sidebar-drawer-w for the drawer. */
@media (max-width: 960px) {
  :root,
  html,
  html.wa-has-app-nav {
    --sidebar-drawer-w: min(280px, 86vw);
    --sidebar-w: 0px;
  }

  .layout {
    display: block !important;
  }

  /* Zero gutter even if a later rule reassigns margin-left to var(--sidebar-w) */
  html.wa-has-app-nav .main,
  html.wa-narrow .main,
  .layout > .main,
  .main {
    margin-left: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  /* Off-canvas overlay — fixed so it never participates in layout width */
  html.wa-has-app-nav .sidebar,
  .layout > .sidebar,
  aside.sidebar {
    position: fixed !important;
    left: 0 !important;
    right: auto !important;
    top: var(--wa-app-nav-h, 0px) !important;
    width: var(--sidebar-drawer-w) !important;
    max-width: 86vw !important;
    transform: translate3d(-105%, 0, 0);
    transition: transform 0.2s ease;
    z-index: 55 !important;
    pointer-events: none;
  }

  html.wa-has-app-nav body.nav-open .sidebar,
  body.nav-open .layout > .sidebar,
  body.nav-open aside.sidebar {
    transform: translate3d(0, 0, 0);
    pointer-events: auto;
  }

  .menu-btn,
  html.wa-has-app-nav .menu-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    min-width: 44px;
    flex: 0 0 auto;
    writing-mode: horizontal-tb;
  }

  .backdrop,
  html.wa-has-app-nav .backdrop {
    z-index: 50;
  }

  body.nav-open .backdrop,
  html.wa-has-app-nav body.nav-open .backdrop {
    display: block !important;
  }

  /* Top nav: row1 logo+actions, row2 full-width swipeable tabs.
     Reserve enough space so fixed nav never covers .topbar / 目录.
     Exact height is synced to --wa-app-nav-h by app-nav.js. */
  html.wa-has-app-nav {
    --wa-app-nav-h: 112px;
  }

  .wa-app-nav {
    height: auto !important;
    min-height: 0;
    flex-wrap: wrap;
    align-content: flex-start;
    padding: 8px 12px 0;
    gap: 2px 8px;
    overflow: visible;
    box-sizing: border-box;
  }

  .wa-app-logo {
    order: 1;
    font-size: 1.15rem;
    max-width: min(42vw, 11rem);
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .wa-app-right {
    order: 2;
    margin-left: auto;
    gap: 6px;
    max-width: none;
    flex: 0 0 auto;
    overflow: visible;
  }

  /* 窄屏：后台入口保持可见；助手已并入主导航 Tab */
  a.wa-app-admin {
    display: inline-flex !important;
    align-items: center;
    padding: 5px 8px;
    font-size: 12px;
  }

  /* 窄屏隐藏用户名，只留头像 + 退出 */
  .wa-app-right .wa-auth-user span {
    display: none !important;
  }

  .wa-app-right .wa-auth-bar {
    gap: 6px;
  }

  .wa-app-links {
    order: 3;
    flex: 1 1 100%;
    width: 100%;
    max-width: 100%;
    padding: 2px 0 10px;
    gap: 4px;
    overflow-x: auto;
    overflow-y: visible;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
    mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 24px), transparent);
    -webkit-mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 24px), transparent);
  }

  .wa-app-channel-btn {
    padding: 8px 12px;
    font-size: 17px;
    font-weight: 750;
    scroll-snap-align: start;
  }

  .wa-app-mega {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--wa-app-nav-h, 112px);
    min-width: 0;
    max-height: calc(100vh - var(--wa-app-nav-h, 112px));
    overflow: auto;
    border-radius: 0;
  }

  .wa-app-mega-inner {
    width: calc(100% - 32px);
    padding: 16px 0 20px;
  }

  .wa-app-mega-kicker b {
    font-size: 1.2rem;
  }

  .wa-app-mega-rail,
  .wa-app-mega[data-count="2"] .wa-app-mega-rail,
  .wa-app-mega[data-count="4"] .wa-app-mega-rail,
  .wa-app-mega[data-count="5"] .wa-app-mega-rail {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .wa-app-mega-tile {
    min-height: 0;
    padding: 14px 16px;
    border-radius: 14px;
  }

  .wa-app-mega-title,
  .wa-app-mega-tile.is-overview .wa-app-mega-title {
    font-size: 1.05rem;
  }

  html.wa-has-app-nav .topbar,
  .layout .topbar {
    padding-left: 12px;
    padding-right: 12px;
    gap: 8px;
  }

  html.wa-has-app-nav .content,
  .layout .content {
    padding-left: 12px;
    padding-right: 12px;
  }

  /* Clip page content only. overflow-x on html/body makes overflow-y
     compute to auto, which turns the document into a scrollport and
     clips the fixed nav / mega on iOS. */
  html.wa-has-app-nav .main,
  html.wa-has-app-nav main,
  .layout > .main,
  .main {
    overflow-x: clip;
  }

  .content img,
  .md-body img,
  .reader img,
  #view-article img,
  .md-figure img {
    max-width: 100%;
    height: auto;
  }

  pre,
  .md-body pre,
  .md-body table,
  .chain,
  .flow-diagram,
  .flow-rail,
  .panel,
  .content .table-wrap {
    max-width: 100%;
    overflow-x: auto;
  }

  .content table {
    max-width: 100%;
  }
}

@media (max-width: 1180px) and (min-width: 961px) {
  .wa-app-nav { padding: 0 24px; gap: 20px; }
  .wa-app-channel-btn { padding: 10px 12px; font-size: 17px; font-weight: 750; }
  .wa-app-mega-inner { width: min(1180px, calc(100% - 48px)); }
}

@media (max-width: 900px) {
  .wa-app-nav { padding: 8px 12px 0; gap: 2px 8px; }
  .wa-app-channel-btn { padding: 8px 10px; font-size: 17px; font-weight: 750; }
}

/* Sidebar brand → home */
.brand a.brand-home {
  display: block;
  text-decoration: none !important;
  color: inherit;
  cursor: pointer;
}
.brand a.brand-home:hover h1 {
  color: var(--wa-primary, #0052d9) !important;
}
.brand a.brand-home h1 {
  margin: 0;
}

/* Collapsible sidebar nav */
.wa-nav-toggle {
  cursor: pointer;
  display: flex !important;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  user-select: none;
  border-radius: 8px;
  transition: background 0.15s ease, color 0.15s ease;
}
.wa-nav-toggle:hover {
  color: var(--sidebar-text, #1a2332) !important;
  background: var(--sidebar-hover, rgba(0, 82, 217, 0.06));
}
.wa-nav-chevron {
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.65;
  flex: 0 0 auto;
  transition: transform 0.2s ease;
  margin-right: 4px;
}
.is-collapsed > .wa-nav-toggle .wa-nav-chevron,
a.wa-has-sub.is-sub-collapsed .wa-nav-chevron {
  transform: rotate(-45deg);
  margin-top: -2px;
}
.hub.is-collapsed > :not(.toc-label),
.toc-group.is-collapsed > :not(.toc-label),
.toc.is-collapsed > :not(.toc-label),
.sub.is-collapsed {
  display: none !important;
}
a.wa-has-sub {
  position: relative;
  padding-right: 34px !important;
  cursor: pointer;
  user-select: none;
}
a.wa-has-sub .wa-sub-toggle {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
a.wa-has-sub .wa-sub-toggle:hover {
  background: var(--sidebar-hover, rgba(0, 82, 217, 0.08));
}
a.wa-has-sub .wa-sub-toggle .wa-nav-chevron {
  margin: 0;
}

/* Topbar placement on subpages */
.topbar-actions,
.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* Subpages: no Way to Agentic / … crumb. Desktop content starts under global nav.
   Mobile keeps .topbar for the 目录 button. Planner / timeline keep action buttons. */
@media (min-width: 961px) {
  html.wa-has-app-nav .topbar:not([data-keep-topbar]) {
    display: none !important;
  }
}
.topbar-actions .topbar-meta {
  font-size: 12px;
  color: var(--muted, #94a3b8);
}
.topbar .wa-theme-slot-top,
.topbar-actions #wa-theme-slot,
.top-actions #wa-theme-slot {
  display: inline-flex;
  align-items: center;
}

/* Theme toggle control */
.wa-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--wa-line, rgba(0, 0, 0, 0.1));
  background: var(--wa-bg-elevated, #fff);
  color: var(--wa-ink, #1a1a1a);
  cursor: pointer;
  padding: 0;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  flex: 0 0 auto;
}
.wa-theme-toggle:hover {
  transform: translateY(-1px);
  border-color: var(--wa-primary, #0052d9);
}
.wa-theme-toggle svg {
  width: 18px;
  height: 18px;
  display: block;
}
.wa-theme-toggle .wa-icon-sun { display: none; }
.wa-theme-toggle .wa-icon-moon { display: block; }
html[data-theme="dark"] .wa-theme-toggle .wa-icon-sun { display: block; }
html[data-theme="dark"] .wa-theme-toggle .wa-icon-moon { display: none; }

html[data-theme="dark"] .wa-theme-toggle {
  background: rgba(255, 255, 255, 0.06);
  color: #e8eef7;
  border-color: rgba(255, 255, 255, 0.12);
}

/* Subpage surface sync */
html[data-theme="light"] body,
html[data-theme="dark"] body {
  color: var(--ink);
  background: var(--soft);
}

html[data-theme="light"] .main,
html[data-theme="light"] .content,
html[data-theme="dark"] .main,
html[data-theme="dark"] .content {
  color: var(--ink);
  background: var(--soft);
}

/* Tab landing: same full-bleed stage as 技术演进 (no extra top strip). */
.overview-stage,
.ha-sheet {
  width: 100%;
  max-width: none;
  margin: 0;
  min-height: calc(100vh - var(--wa-app-nav-h, 72px));
  padding: 36px 40px 48px;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  background:
    radial-gradient(1200px 420px at 8% -10%, rgba(56, 189, 248, 0.2), transparent 55%),
    radial-gradient(900px 380px at 92% 0%, rgba(129, 140, 248, 0.16), transparent 50%),
    linear-gradient(180deg, var(--wa-bg-elevated, var(--paper)) 0%, var(--soft) 100%);
}
.overview-hero,
.page-head {
  max-width: 920px;
  margin: 0 0 22px;
  padding: 0;
  background: transparent !important;
  border: 0 !important;
  box-shadow: none !important;
}
.overview-hero h2,
.page-head h2,
.overview-stage > header h2 {
  margin: 0 0 10px;
  padding: 0;
  border: 0;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
}
.overview-hero .lead,
.page-head .lead,
.overview-stage > .lead {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--muted);
  max-width: 56ch;
}
html[data-theme="dark"] .overview-stage,
html[data-theme="dark"] .ha-sheet {
  background:
    radial-gradient(1200px 420px at 8% -10%, rgba(56, 189, 248, 0.12), transparent 55%),
    radial-gradient(900px 380px at 92% 0%, rgba(129, 140, 248, 0.1), transparent 50%),
    linear-gradient(180deg, #0f172a 0%, #0b1220 100%);
}
@media (max-width: 960px) {
  .overview-stage,
  .ha-sheet {
    padding: 20px 16px 32px;
  }
}

html[data-theme="light"] .chapter,
html[data-theme="light"] .book-cover,
html[data-theme="light"] .panel,
html[data-theme="light"] .card,
html[data-theme="light"] .day-card,
html[data-theme="light"] .board,
html[data-theme="light"] article,
html[data-theme="light"] .paper,
html[data-theme="dark"] .chapter,
html[data-theme="dark"] .book-cover,
html[data-theme="dark"] .panel,
html[data-theme="dark"] .card,
html[data-theme="dark"] .day-card,
html[data-theme="dark"] .board,
html[data-theme="dark"] article,
html[data-theme="dark"] .paper {
  color: var(--ink) !important;
  background: var(--paper) !important;
  border-color: var(--line) !important;
}

/* Planner board pieces keep their own token-based surfaces */
html[data-theme="light"] .kanban,
html[data-theme="dark"] .kanban {
  background: transparent !important;
  border-color: transparent !important;
  color: var(--ink) !important;
}
html[data-theme="light"] .task-card,
html[data-theme="dark"] .task-card,
html[data-theme="light"] .memo,
html[data-theme="dark"] .memo,
html[data-theme="light"] .col,
html[data-theme="dark"] .col {
  color: var(--ink) !important;
  border-color: var(--line) !important;
}
html[data-theme="light"] .task-card .title,
html[data-theme="light"] .memo .title,
html[data-theme="light"] .memo .body,
html[data-theme="light"] .inline-edit,
html[data-theme="dark"] .task-card .title,
html[data-theme="dark"] .memo .title,
html[data-theme="dark"] .memo .body,
html[data-theme="dark"] .inline-edit {
  color: var(--ink) !important;
  background: transparent !important;
  border-color: transparent !important;
}

html[data-theme="light"] .topbar {
  background: rgba(245, 247, 250, 0.92) !important;
  border-bottom-color: var(--line) !important;
  color: var(--muted);
}
html[data-theme="dark"] .topbar {
  background: rgba(15, 26, 42, 0.92) !important;
  border-bottom-color: var(--line) !important;
  color: var(--muted);
}
html[data-theme="light"] .topbar .crumb b,
html[data-theme="dark"] .topbar .crumb b,
html[data-theme="light"] .crumb b,
html[data-theme="dark"] .crumb b {
  color: var(--ink) !important;
}

html[data-theme="light"] h1,
html[data-theme="light"] h2,
html[data-theme="light"] h3,
html[data-theme="light"] h4,
html[data-theme="light"] .chapter h4,
html[data-theme="light"] .item .title,
html[data-theme="dark"] h1,
html[data-theme="dark"] h2,
html[data-theme="dark"] h3,
html[data-theme="dark"] h4,
html[data-theme="dark"] .chapter h4,
html[data-theme="dark"] .item .title {
  color: var(--ink) !important;
}

html[data-theme="light"] p,
html[data-theme="light"] li,
html[data-theme="light"] td,
html[data-theme="light"] .depth,
html[data-theme="dark"] p,
html[data-theme="dark"] li,
html[data-theme="dark"] td,
html[data-theme="dark"] .depth {
  color: var(--ink);
}
html[data-theme="light"] .lead,
html[data-theme="light"] .book-cover .lead,
html[data-theme="light"] .item .src,
html[data-theme="light"] .muted,
html[data-theme="dark"] .lead,
html[data-theme="dark"] .book-cover .lead,
html[data-theme="dark"] .item .src,
html[data-theme="dark"] .muted {
  color: var(--muted) !important;
}

/* Hardcoded light cards / chips / callouts → theme-aware */
html[data-theme="dark"] .one-liner,
html[data-theme="dark"] .action,
html[data-theme="dark"] .tip,
html[data-theme="dark"] .tier,
html[data-theme="dark"] .section-block,
html[data-theme="dark"] .plan-item,
html[data-theme="dark"] .todo-item,
html[data-theme="dark"] .src-grid .src,
html[data-theme="dark"] .quick a {
  color: var(--ink) !important;
  background: rgba(71, 135, 240, 0.1) !important;
  border-color: rgba(71, 135, 240, 0.28) !important;
}
html[data-theme="light"] .one-liner,
html[data-theme="light"] .action {
  color: var(--ink) !important;
}

html[data-theme="dark"] .section-block.bonus {
  background: rgba(139, 92, 246, 0.12) !important;
  border-left-color: #8b5cf6 !important;
}
html[data-theme="dark"] .section-block.fw {
  background: rgba(37, 99, 235, 0.12) !important;
  border-left-color: #3b82f6 !important;
}
html[data-theme="dark"] .section-block.oss {
  background: rgba(5, 150, 105, 0.12) !important;
  border-left-color: #10b981 !important;
}
html[data-theme="dark"] .section-block.bp {
  background: rgba(217, 119, 6, 0.12) !important;
  border-left-color: #f59e0b !important;
}
html[data-theme="dark"] .section-block.src {
  background: rgba(2, 132, 199, 0.12) !important;
  border-left-color: #38bdf8 !important;
}

html[data-theme="light"] .chip,
html[data-theme="dark"] .chip {
  background: var(--paper) !important;
  border-color: var(--line) !important;
  color: var(--ink) !important;
}
html[data-theme="light"] .chip b,
html[data-theme="dark"] .chip b {
  color: var(--blue) !important;
}

html[data-theme="dark"] .note {
  color: #fde68a !important;
  background: rgba(120, 53, 15, 0.35) !important;
  border-color: rgba(245, 158, 11, 0.35) !important;
  border-left-color: #f59e0b !important;
}
html[data-theme="light"] .note {
  color: var(--wa-warn-ink) !important;
  background: var(--wa-warn-bg) !important;
}
/* sources 卡片内 .note 是说明文字，不是警告条 */
html[data-theme="dark"] .src .note,
html[data-theme="light"] .src .note {
  color: var(--muted) !important;
  background: transparent !important;
  border: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
}
html[data-theme="dark"] .src .name,
html[data-theme="dark"] .src .kind {
  color: var(--ink) !important;
}
html[data-theme="dark"] .src .kind { color: var(--muted) !important; }

html[data-theme="dark"] table,
html[data-theme="dark"] th,
html[data-theme="dark"] td {
  background: var(--paper) !important;
  color: var(--ink) !important;
  border-color: var(--line) !important;
}
html[data-theme="dark"] th {
  background: rgba(255, 255, 255, 0.04) !important;
}
html[data-theme="light"] table,
html[data-theme="light"] th,
html[data-theme="light"] td {
  color: var(--ink);
  border-color: var(--line);
}

html[data-theme="dark"] .menu-btn,
html[data-theme="dark"] .top-actions button,
html[data-theme="dark"] .panel-head .add,
html[data-theme="dark"] .src .links a,
html[data-theme="dark"] .task-card select,
html[data-theme="dark"] .task-card .tag-edit {
  background: var(--paper) !important;
  color: var(--ink) !important;
  border-color: var(--line) !important;
}
html[data-theme="dark"] .top-actions button.primary,
html[data-theme="dark"] .src .links a.primary {
  background: var(--wa-primary) !important;
  color: #fff !important;
  border-color: var(--wa-primary) !important;
}

html[data-theme="dark"] .focus-input,
html[data-theme="dark"] .notes,
html[data-theme="dark"] .inline-edit,
html[data-theme="dark"] input,
html[data-theme="dark"] textarea,
html[data-theme="dark"] select {
  color: var(--ink) !important;
  background: rgba(255, 255, 255, 0.04) !important;
  border-color: var(--line) !important;
}
html[data-theme="dark"] .focus-input::placeholder,
html[data-theme="dark"] .notes::placeholder,
html[data-theme="dark"] input::placeholder,
html[data-theme="dark"] textarea::placeholder {
  color: var(--muted) !important;
}

html[data-theme="light"] .menu-btn,
html[data-theme="light"] .top-actions button:not(.primary) {
  background: var(--wa-paper);
  color: var(--ink);
  border-color: var(--line);
}

/* Sidebar follows theme (light ↔ dark) */
html[data-theme="light"] .sidebar,
html[data-theme="dark"] .sidebar {
  background: linear-gradient(180deg, var(--sidebar) 0%, var(--sidebar-2) 100%) !important;
  color: var(--sidebar-link) !important;
  border-right: 1px solid var(--sidebar-border) !important;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}
html[data-theme="light"] .sidebar::-webkit-scrollbar-thumb {
  background: rgba(15, 23, 42, 0.15) !important;
}
html[data-theme="dark"] .sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15) !important;
}

html[data-theme="light"] .brand,
html[data-theme="dark"] .brand {
  background: color-mix(in srgb, var(--sidebar) 92%, transparent) !important;
  border-bottom: 1px solid var(--sidebar-border) !important;
  backdrop-filter: blur(8px);
}
html[data-theme="light"] .brand h1,
html[data-theme="dark"] .brand h1 {
  color: var(--sidebar-text) !important;
}
html[data-theme="light"] .brand p,
html[data-theme="dark"] .brand p {
  color: var(--sidebar-muted) !important;
}
html[data-theme="light"] .brand .mark,
html[data-theme="dark"] .brand .mark {
  color: var(--wa-on-primary, #fff) !important;
  background: linear-gradient(135deg, var(--wa-primary), var(--wa-primary-hover)) !important;
}

html[data-theme="light"] .hub,
html[data-theme="dark"] .hub,
html[data-theme="light"] .sidebar-foot,
html[data-theme="dark"] .sidebar-foot {
  border-color: var(--sidebar-border) !important;
  color: var(--sidebar-muted) !important;
}
html[data-theme="light"] .sidebar-foot a,
html[data-theme="dark"] .sidebar-foot a {
  color: var(--wa-primary) !important;
}

html[data-theme="light"] .toc-label,
html[data-theme="dark"] .toc-label,
html[data-theme="light"] .hub .toc-label,
html[data-theme="dark"] .hub .toc-label {
  color: var(--sidebar-muted) !important;
}

html[data-theme="light"] .hub a,
html[data-theme="light"] .toc a,
html[data-theme="light"] .toc a.day,
html[data-theme="dark"] .hub a,
html[data-theme="dark"] .toc a,
html[data-theme="dark"] .toc a.day {
  color: var(--sidebar-link) !important;
  border-color: transparent !important;
}
html[data-theme="light"] .hub a small,
html[data-theme="light"] .toc a small,
html[data-theme="light"] .toc a.day .hint,
html[data-theme="dark"] .hub a small,
html[data-theme="dark"] .toc a small,
html[data-theme="dark"] .toc a.day .hint {
  color: var(--sidebar-muted) !important;
}

html[data-theme="light"] .hub a:hover,
html[data-theme="light"] .toc a:hover,
html[data-theme="light"] .toc a.day:hover,
html[data-theme="dark"] .hub a:hover,
html[data-theme="dark"] .toc a:hover,
html[data-theme="dark"] .toc a.day:hover {
  background: var(--sidebar-hover) !important;
  color: var(--sidebar-text) !important;
  text-decoration: none !important;
}

html[data-theme="light"] .hub a.here,
html[data-theme="light"] .toc a.active,
html[data-theme="light"] .toc a.day.active,
html[data-theme="dark"] .hub a.here,
html[data-theme="dark"] .toc a.active,
html[data-theme="dark"] .toc a.day.active {
  background: var(--sidebar-active-bg) !important;
  color: var(--sidebar-text) !important;
  border-color: var(--sidebar-active-border) !important;
}
html[data-theme="light"] .hub a.here small,
html[data-theme="light"] .toc a.active small,
html[data-theme="dark"] .hub a.here small,
html[data-theme="dark"] .toc a.active small {
  color: var(--sidebar-muted) !important;
}

html[data-theme="light"] .toc .sub a::before {
  background: #94a3b8 !important;
}
html[data-theme="dark"] .toc .sub a::before {
  background: #475569 !important;
}

/* Auth widget inside light sidebar */
html[data-theme="light"] .sidebar .wa-auth-bar .wa-auth-user { color: #475569; }
html[data-theme="light"] .sidebar .wa-auth-bar a.wa-auth-btn,
html[data-theme="light"] .sidebar .wa-auth-bar button.wa-auth-btn {
  border-color: #dce4eb;
  background: var(--wa-paper);
  color: #15202b;
}
html[data-theme="light"] .sidebar .wa-auth-bar a.wa-auth-btn.primary {
  background: linear-gradient(135deg, #0052d9, #266fe8);
  color: #fff;
  border: none;
}

/* Beian bar follows theme */
html[data-theme="dark"] .wa-beian {
  color: #8b9bb0;
  border-top-color: rgba(255, 255, 255, 0.08);
}
html[data-theme="dark"] .wa-beian a { color: #8b9bb0; }
html[data-theme="dark"] .wa-beian a:hover { color: #69a1ff; }

/* Auth bar on dark pages stays readable */
html[data-theme="light"] .wa-auth-bar.light a.wa-auth-btn.primary {
  background: linear-gradient(135deg, #0052d9, #266fe8);
  color: #fff;
}

.wa-card {
  background: var(--wa-paper);
  color: var(--wa-ink);
  border: 1px solid var(--wa-line);
  border-radius: 16px;
  box-shadow: var(--wa-shadow, var(--shadow));
}
.wa-soft-block {
  background: var(--wa-soft);
  color: var(--wa-ink);
  border: 1px solid var(--wa-line);
  border-radius: 12px;
}
.wa-callout {
  margin: 0 0 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--wa-line);
  background: var(--wa-soft);
  color: var(--wa-ink);
  font-size: 13px;
  line-height: 1.6;
}
.wa-callout.warn {
  background: var(--wa-warn-bg);
  color: var(--wa-warn-ink);
  border-color: var(--wa-warn-border);
}
.wa-callout a { color: var(--wa-link); }
.wa-muted { color: var(--wa-muted); }
.wa-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border: 1px solid var(--wa-line);
  border-radius: 999px;
  background: var(--wa-soft);
  color: var(--wa-muted);
  font-size: 12px;
  line-height: 1.4;
  font-weight: 600;
}
/* 知识源 / 精读：轻量正文，不要首行缩进、不要窄栏书卷。 */
.wa-prose {
  font-size: 15px;
  line-height: 1.8;
  color: var(--wa-ink);
  max-width: 760px;
}
.wa-prose h1,
.wa-prose h2,
.wa-prose h3,
.wa-prose h4 {
  color: var(--wa-ink);
}
.wa-prose a { color: var(--wa-link); }
.wa-prose :not(pre) > code {
  background: var(--wa-code-bg);
  color: var(--wa-ink);
  padding: 1px 5px;
  border-radius: 5px;
}
.wa-prose pre {
  background: var(--wa-pre-bg);
  color: var(--wa-pre-ink);
  border-radius: 12px;
  padding: 14px 16px;
  overflow: auto;
}
.wa-prose blockquote {
  margin: 14px 0 18px;
  padding: 14px 16px;
  border-left: 3px solid var(--wa-primary);
  background: var(--wa-prose-quote-bg);
  color: var(--wa-prose-quote-ink);
  border-radius: 0 14px 14px 0;
}
.wa-prose table th {
  background: var(--wa-soft);
  color: var(--wa-ink);
}

/* 课文纸面：与技术演进首页同舞台；排版规则见下方 .ha-article */
.ha-sheet .ha-article {
  max-width: none;
}
.ha-status {
  color: var(--wa-muted, var(--muted));
  font-size: 14px;
  margin: 0 0 12px;
}
.ha-article,
.ha-article.wa-prose {
  max-width: none;
  font-size: inherit;
  line-height: inherit;
}
.ha-article h1,
.ha-article h2,
.ha-article h3,
.ha-article h4 { scroll-margin-top: 84px; }
.ha-article h1 { font-size: 28px; line-height: 1.3; margin: 0 0 16px; font-weight: 700; }

/* Tab 首页：宣传级定位（Stripe / Linear docs 式 kicker + 图 + 分工） */
.overview-stage .wa-land { margin-bottom: 28px; }
.wa-land-kicker {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--wa-primary, var(--teal, #0f766e));
}
.wa-land-top {
  display: grid;
  grid-template-columns: minmax(18em, 1.2fr) minmax(200px, 0.8fr);
  gap: 28px 36px;
  align-items: start;
  margin-bottom: 28px;
}
.wa-land-top > div {
  min-width: 0;
  overflow: visible;
}
.wa-land h1,
.ha-article.wa-land-host .wa-land h1 {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 3.2vw, 2.35rem);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.18;
  color: var(--ink);
}
.wa-land-lead {
  margin: 0 0 18px;
  max-width: none;
  font-size: 16px;
  line-height: 1.7;
  color: var(--muted);
  overflow: visible;
  overflow-wrap: break-word;
  word-break: normal;
}
.wa-land-cta { display: flex; flex-wrap: wrap; gap: 10px; }
.wa-land-visual { margin: 0; }
.wa-land-svg { width: 100%; height: auto; display: block; }
.wa-land-svg-bg { fill: color-mix(in srgb, var(--paper, #fff) 70%, transparent); }
html[data-theme="dark"] .wa-land-svg-bg { fill: rgba(15, 23, 42, 0.55); }
.wa-land-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 0 0 22px;
}
.wa-land-split > div {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--paper, #fff) 82%, transparent);
}
.wa-land-split h3 {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--wa-primary, #0ea5e9);
}
.ha-article.wa-land-host .wa-land-split h3 { margin: 0 0 6px; padding: 0; border: 0; font-size: 13px; }
.wa-land-split p { margin: 0; font-size: 14px; line-height: 1.6; color: var(--muted); }
.wa-land-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.wa-land-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  text-decoration: none !important;
  color: inherit;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.wa-land-card:hover {
  border-color: color-mix(in srgb, var(--wa-primary) 45%, var(--line));
  transform: translateY(-2px);
}
.wa-land-card-k {
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--wa-primary, #0ea5e9);
}
.wa-land-card b { font-size: 15px; font-weight: 700; color: var(--ink); }
.wa-land-card span:last-child { font-size: 13px; line-height: 1.5; color: var(--muted); }
@media (max-width: 960px) {
  .wa-land-top,
  .wa-land-split,
  .wa-land-grid { grid-template-columns: 1fr; }
}
.ha-article h2 {
  font-size: 20px;
  margin: 32px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--wa-line, var(--line));
  font-weight: 700;
}
.ha-article h2:first-child { border-top: 0; margin-top: 8px; }
.ha-article h3 { font-size: 16.5px; margin: 22px 0 8px; font-weight: 700; }
.ha-article h4 { font-size: 15px; margin: 18px 0 8px; font-weight: 700; }
.ha-article p { margin: 0 0 12px; text-indent: 0; }
.ha-article ul,
.ha-article ol { margin: 0 0 14px; padding-left: 22px; }
.ha-article li { margin: 4px 0; text-indent: 0; }
.ha-article a { color: var(--wa-link); }
.ha-article a.wa-btn {
  color: var(--wa-ink, var(--ink, #1a2332));
}
.ha-article a.wa-btn:hover {
  color: var(--wa-primary, #0052d9);
}
.ha-article a.wa-btn-primary,
.ha-article a.wa-btn-primary:hover {
  color: var(--wa-on-primary, #ffffff);
  background: var(--wa-primary, #0052d9);
  border-color: var(--wa-primary, #0052d9);
}
.ha-article a.wa-btn-primary:hover {
  background: var(--wa-primary-hover, #0062ff);
  border-color: var(--wa-primary-hover, #0062ff);
}
.ha-article img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 8px auto;
  border-radius: 12px;
  border: 1px solid var(--wa-line, var(--line));
}
.ha-article .toc-logo,
.ha-article .wa-read-source img,
.ha-article .wa-read-card img,
.ha-article img.fw-logo,
.ha-article .fw-intro img,
.ha-article .qd-hub img {
  display: block;
  margin: 0;
  max-width: none;
  cursor: default;
  border: 0;
  border-radius: 4px;
}
.ha-article .qd-hub,
.ha-article .qd-hub p,
.ha-article .qd-hub small,
.ha-article .qd-hub strong,
.ha-article .fw-intro,
.ha-article .fw-intro p,
.ha-article .fw-intro small,
.ha-article .fw-intro strong {
  color: inherit;
}
.ha-article .fw-intro a.fw-card {
  color: inherit !important;
  text-decoration: none !important;
}
.ha-article .fw-intro a.fw-card-main,
.ha-article .fw-intro a.fw-card-main strong {
  color: #fff !important;
}
.ha-article .fw-intro .fw-hero h1 {
  margin: 0 0 8px;
  font-size: 30px;
  border: 0;
}
.ha-article .fw-intro-host > h1.fw-intro-hide { display: none !important; }
.ha-article .qd-hub a,
.ha-article .qd-news-list a { color: #dc244c; }
.ha-article .qd-hub-card {
  color: #161e33 !important;
  text-decoration: none !important;
}
.ha-article .qd-hub-card small { color: #717c99; }
.ha-article .qd-hub-card-main,
.ha-article .qd-hub-card-main strong,
.ha-article .qd-hub-card-main .qd-hub-card-kicker,
.ha-article .qd-hub-card-main small {
  color: #fff !important;
}
html[data-theme="dark"] .ha-article .qd-hub-card {
  color: #f8fafc !important;
}
html[data-theme="dark"] .ha-article .qd-hub-card small { color: #8f98b2; }
html[data-theme="dark"] .ha-article .qd-hub-card-main small { color: #ffe4e6 !important; }
.ha-article .fw-name {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.ha-article img.fw-logo {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  object-fit: contain;
  background: var(--wa-paper, #fff);
  border: 1px solid var(--wa-line, var(--line));
  flex: 0 0 auto;
}
.ha-article .mermaid {
  margin: 12px 0 20px;
  text-align: center;
  overflow-x: auto;
  background: var(--wa-bg-elevated, var(--card, #fff));
  border-radius: 12px;
  padding: 12px 8px;
  border: 1px solid var(--wa-line, var(--line));
}
.ha-article em.figcap,
.ha-article p.figcap {
  display: block;
  text-align: center;
  font-size: 13px;
  color: var(--wa-muted, #64748b);
  font-style: normal;
  margin: -4px 0 22px;
}
.ha-article [align="center"] { text-align: center; margin: 18px 0; }
.ha-article table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  margin: 12px 0 18px;
}
.ha-article th,
.ha-article td {
  border: 1px solid var(--wa-line, var(--line));
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
.ha-article table th { background: var(--wa-soft); color: var(--wa-ink); }
.ha-article pre {
  margin: 12px 0 18px;
  font-size: 13px;
  line-height: 1.55;
}
.ha-article hr {
  border: 0;
  border-top: 1px solid var(--wa-line, var(--line));
  margin: 28px 0;
}
.ha-pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--wa-line, var(--line));
}

/* —— Shared controls (use these instead of hardcoded #fff buttons) —— */
.wa-btn,
.eng-btn,
.src .links a,
.quick a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 12.5px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--wa-line, var(--line, #e2e8f0));
  background: var(--wa-bg-elevated, var(--paper, #fff));
  color: var(--wa-ink, var(--ink, #1a2332));
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.wa-btn:hover,
.eng-btn:hover,
.src .links a:hover,
.quick a:hover {
  border-color: var(--wa-primary, var(--blue, #2563eb));
  color: var(--wa-primary, var(--blue, #2563eb));
  text-decoration: none;
  background: var(--wa-bg-elevated, var(--paper, #fff));
}
.wa-btn-primary,
.eng-btn.primary,
.src .links a.primary {
  background: var(--wa-primary, #0052d9);
  border-color: var(--wa-primary, #0052d9);
  color: var(--wa-on-primary, #fff);
}
.wa-btn-primary:hover,
.eng-btn.primary:hover,
.src .links a.primary:hover {
  background: var(--wa-primary-hover, #0062ff);
  border-color: var(--wa-primary-hover, #0062ff);
  color: var(--wa-on-primary, #fff);
}
.wa-chip,
.chip {
  background: var(--wa-bg-elevated, var(--paper, #fff)) !important;
  border: 1px solid var(--wa-line, var(--line, #e2e8f0)) !important;
  color: var(--wa-ink, var(--ink, #334155)) !important;
}
.wa-chip b,
.chip b {
  color: var(--wa-primary, var(--blue, #2563eb)) !important;
}
html[data-theme="dark"] .wa-btn,
html[data-theme="dark"] .eng-btn,
html[data-theme="dark"] .src .links a,
html[data-theme="dark"] .quick a {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
  color: var(--wa-ink, #e8eef7);
}
html[data-theme="dark"] .wa-btn:hover,
html[data-theme="dark"] .eng-btn:hover,
html[data-theme="dark"] .src .links a:hover,
html[data-theme="dark"] .quick a:hover {
  background: color-mix(in srgb, var(--wa-primary) 18%, transparent);
  border-color: color-mix(in srgb, var(--wa-primary) 55%, transparent);
  color: var(--wa-primary-hover, #69a1ff);
}
html[data-theme="dark"] .wa-btn-primary,
html[data-theme="dark"] .eng-btn.primary,
html[data-theme="dark"] .src .links a.primary,
html[data-theme="dark"] .ha-article a.wa-btn-primary,
html[data-theme="dark"] .ha-article a.wa-btn-primary:hover {
  background: var(--wa-primary, #4787f0);
  border-color: var(--wa-primary, #4787f0);
  color: var(--wa-on-primary, #fff);
}
html[data-theme="dark"] .menu-btn {
  background: var(--wa-bg-elevated, #121a2b);
  border-color: var(--wa-line, #243044);
  color: var(--wa-ink, #e8eef7);
}

.ha-sheet.ha-sheet-hub {
  padding: 0;
  background: var(--paper, #fff);
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.ha-sheet.ha-sheet-hub .ha-status:empty,
.ha-sheet.ha-sheet-hub .ha-pager:empty { display: none; margin: 0; }
.ha-article.wa-hub-host {
  max-width: none !important;
  padding: 0 !important;
  margin: 0 !important;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.wa-hub-embed {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
}
.wa-hub-embed-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  font-size: 13px;
  color: var(--muted);
}
.wa-hub-embed-bar strong { color: var(--ink); font-weight: 650; }
.wa-hub-embed-bar span { flex: 1; min-width: 0; }
.wa-hub-embed-bar a { margin-left: auto; white-space: nowrap; }
.wa-hub-frame {
  flex: 1 1 auto;
  width: 100%;
  height: calc(100dvh - var(--wa-app-nav-h, 72px) - 92px);
  min-height: 640px;
  border: 0;
  background: #fff;
}
.wa-hub-list,
.wa-hub-empty {
  max-width: 920px;
  padding: 36px 40px 64px;
}
.wa-hub-empty h1,
.wa-hub-list h1 { margin: 0 0 16px; }
.wa-hub-empty p { color: var(--muted); }
@media (max-width: 960px) {
  .wa-hub-list,
  .wa-hub-empty { padding: 20px 16px 40px; }
  .wa-hub-frame { min-height: 70vh; height: 70vh; }
}

/* 生产实践：栈关系门面（全宽） */
.ha-sheet:has(.wa-land-host) .ha-status:empty { display: none; margin: 0; }
.ha-article.wa-land-host {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - var(--wa-app-nav-h, 72px) - 120px);
}
.ha-article.wa-land-host .wa-studio {
  max-width: none;
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-height: 0;
}
.wa-studio-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(220px, 18rem);
  gap: 24px 40px;
  align-items: end;
}
.wa-studio-hero-copy { min-width: 0; }
.wa-studio-kicker {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--wa-primary);
}
.wa-studio h1,
.ha-article.wa-land-host .wa-studio h1 {
  margin: 0 0 12px;
  font-size: clamp(1.85rem, 3.6vw, 2.7rem);
  font-weight: 780;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--ink);
}
.wa-studio-lead {
  margin: 0 0 18px;
  font-size: 16.5px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 46rem;
}
.wa-studio-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}
.wa-studio-metrics {
  list-style: none;
  margin: 0;
  padding: 4px 0 0;
  display: grid;
  gap: 10px;
}
.wa-studio-metrics li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
}
.wa-studio-metrics b {
  font-size: 1.65rem;
  font-weight: 780;
  letter-spacing: -0.04em;
  color: var(--ink);
  line-height: 1;
}
.wa-studio-metrics span {
  font-size: 13px;
  color: var(--muted);
}
.wa-studio-board {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 22rem);
  gap: 16px;
  min-height: 28rem;
  align-items: stretch;
}
.wa-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}
.wa-stack-row {
  --layer: var(--wa-primary);
  display: grid;
  grid-template-columns: 6.25rem minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
  min-height: 0;
  flex: 1;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
}
.wa-stack-row[data-layer="apps"] { --layer: #0ea5e9; }
.wa-stack-row[data-layer="pack"] { --layer: #6366f1; }
.wa-stack-row[data-layer="know"] { --layer: #8b5cf6; }
.wa-stack-row[data-layer="gate"] { --layer: #0f766e; }
.wa-stack-row-k {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 0 4px 0 10px;
  border-left: 3px solid var(--layer);
  color: var(--layer);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.08em;
}
.wa-stack-row-k small {
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0;
  color: var(--muted);
}
.wa-stack-row-nodes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.wa-stack-row[data-layer="know"] .wa-stack-row-nodes {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.wa-stack-row[data-layer="gate"] .wa-stack-row-nodes {
  grid-template-columns: 1fr;
}
.wa-stack-node {
  font: inherit;
  text-align: left;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
  border-radius: 12px;
  padding: 14px 16px;
  cursor: pointer;
  min-height: 100%;
  transition: transform 0.15s ease, opacity 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.wa-stack-node b {
  display: block;
  font-size: 14.5px;
  font-weight: 750;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.wa-stack-node span {
  display: block;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}
.wa-stack-node:hover {
  border-color: color-mix(in srgb, var(--layer) 55%, var(--line));
  transform: translateY(-1px);
}
.wa-stack-node.is-sel {
  border-color: var(--layer);
  background: color-mix(in srgb, var(--layer) 12%, var(--paper));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--layer) 35%, transparent);
}
.wa-stack-node.is-on:not(.is-sel) {
  border-color: color-mix(in srgb, var(--layer) 32%, var(--line));
  background: color-mix(in srgb, var(--layer) 6%, var(--paper));
}
.wa-stack-node.is-dim {
  opacity: 0.34;
}
.wa-stack-detail {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px 20px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
  min-height: 100%;
}
.wa-stack-detail-hint,
.wa-stack-detail-blurb,
.wa-stack-detail p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}
.wa-stack-detail-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  flex: 1;
}
.wa-stack-detail-layer {
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wa-primary);
}
.wa-stack-detail strong {
  font-size: 1.35rem;
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--ink);
}
.wa-stack-detail-io {
  margin: 4px 0 8px;
  display: grid;
  gap: 10px;
}
.wa-stack-detail-io div {
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.wa-stack-detail-io dt {
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.wa-stack-detail-io dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink);
}
.wa-stack-detail .wa-btn {
  margin-top: auto;
  align-self: flex-start;
}
.wa-sys-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin: 0 0 18px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: color-mix(in srgb, var(--paper) 88%, var(--soft));
  font-size: 13px;
  color: var(--muted);
}
.wa-sys-bar-back {
  font-weight: 700;
  color: var(--wa-link);
  text-decoration: none;
}
.wa-sys-bar-layer {
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--wa-primary);
}
.wa-sys-bar-meta { flex: 1; min-width: 12em; }
@media (max-width: 1080px) {
  .wa-studio-hero,
  .wa-studio-board { grid-template-columns: 1fr; }
  .wa-studio-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .wa-stack-row { min-height: 7.5rem; }
}
@media (max-width: 960px) {
  .wa-stack-row,
  .wa-stack-row[data-layer="know"] .wa-stack-row-nodes { grid-template-columns: 1fr; }
  .wa-studio-metrics { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .wa-stack-node,
  .wa-stack-node:hover { transition: none; transform: none; }
}

/* Community board — Flarum-like discussion list, site tokens */
html.wa-community-page,
html.wa-community-page body {
  background: var(--wa-paper);
}
html.wa-community-page .wa-board {
  box-sizing: border-box;
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.wa-board-shell {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--wa-paper);
  border: 0;
  border-bottom: 1px solid var(--wa-line);
  border-radius: 0;
  overflow: hidden;
}
.wa-board-notice {
  display: grid;
  gap: 8px;
  padding: 14px clamp(16px, 3vw, 40px) 12px;
  border-bottom: 1px solid var(--wa-line);
  background: color-mix(in srgb, var(--wa-soft) 80%, var(--wa-paper));
}
.wa-board-notice p {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--wa-ink);
}
.wa-board-notice strong {
  display: inline-block;
  margin-right: 8px;
  font-size: 12px;
  letter-spacing: 0.02em;
}
.wa-board-notice-warm strong { color: var(--wa-primary); }
.wa-board-notice-rule strong { color: var(--wa-danger-ink); }
.wa-board-notice-rule { color: var(--wa-muted); }
.wa-board-pulse {
  margin: 0;
  padding: 10px clamp(16px, 3vw, 40px);
  border-bottom: 1px solid var(--wa-line);
  background: color-mix(in srgb, var(--wa-primary) 6%, var(--wa-paper));
  color: var(--wa-muted);
  font-size: 13px;
}
.wa-board-pulse strong { color: var(--wa-ink); font-weight: 750; }
.wa-board-starters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 12px clamp(16px, 3vw, 40px);
  border-bottom: 1px solid var(--wa-line);
}
.wa-board-empty .wa-board-starters {
  padding: 4px 0 12px;
  border-bottom: 0;
}
.wa-board-starters-label {
  color: var(--wa-muted);
  font-size: 12px;
  font-weight: 650;
}
.wa-board-starter {
  border: 1px solid var(--wa-line);
  background: var(--wa-paper);
  color: var(--wa-ink);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  line-height: 1.35;
  cursor: pointer;
  text-align: left;
}
.wa-board-starter:hover {
  border-color: color-mix(in srgb, var(--wa-primary) 40%, var(--wa-line));
  color: var(--wa-primary);
}
.wa-board-pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 16px 16px 18px;
  border-top: 1px solid var(--wa-line);
  background: color-mix(in srgb, var(--wa-soft) 55%, var(--wa-paper));
}
.wa-board-page {
  min-width: 36px;
  padding: 6px 10px;
  border: 1px solid var(--wa-line);
  border-radius: 8px;
  background: var(--wa-paper);
  color: var(--wa-ink);
  text-align: center;
  text-decoration: none;
  font-size: 13px;
  font-weight: 650;
}
a.wa-board-page:hover,
.wa-board-page.is-on {
  border-color: color-mix(in srgb, var(--wa-primary) 40%, var(--wa-line));
  color: var(--wa-primary);
}
.wa-board-page.is-on {
  background: color-mix(in srgb, var(--wa-primary) 10%, var(--wa-paper));
}
.wa-board-page.is-off {
  opacity: 0.4;
  cursor: default;
}
.wa-board-loading,
.wa-board-error,
.wa-board-empty-line {
  margin: 0;
  padding: 28px 22px;
  color: var(--wa-muted);
}
.wa-board-error { color: var(--wa-danger-ink); }
.wa-board-empty {
  display: grid;
  justify-items: start;
  align-content: start;
  gap: 8px;
  flex: 1 1 auto;
  padding: 48px clamp(16px, 3vw, 40px);
}
.wa-board-empty strong {
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--wa-ink);
}
.wa-board-empty p {
  margin: 0 0 10px;
  color: var(--wa-muted);
  font-size: 14px;
  line-height: 1.6;
  max-width: 36em;
}
.wa-board-toolbar,
.wa-board-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 clamp(12px, 3vw, 40px);
  border-bottom: 1px solid var(--wa-line);
  background: color-mix(in srgb, var(--wa-paper) 88%, var(--wa-soft));
}
.wa-board-tabs {
  display: flex;
  align-items: stretch;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.wa-board-tabs::-webkit-scrollbar { display: none; }
.wa-board-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 12px 14px 10px;
  border-bottom: 2px solid transparent;
  text-decoration: none;
  color: var(--wa-muted);
  font-size: 14px;
  font-weight: 650;
  white-space: nowrap;
}
.wa-board-tab-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--wa-muted) 10%, transparent);
  color: inherit;
}
.wa-board-tab-mark svg {
  width: 16px;
  height: 16px;
  display: block;
}
.wa-board-tab.is-on .wa-board-tab-mark,
.wa-board-tab:hover .wa-board-tab-mark {
  background: color-mix(in srgb, var(--wa-primary) 14%, transparent);
  color: var(--wa-primary);
}
.wa-board-tab.is-on,
.wa-board-tab:hover {
  color: var(--wa-primary);
  background: transparent;
}
.wa-board-tab.is-on { border-bottom-color: var(--wa-primary); }
.wa-board-publish,
.wa-board-inline button,
.wa-board-compose button {
  border: 0;
  border-radius: 8px;
  padding: 8px 14px;
  background: var(--wa-primary);
  color: var(--wa-on-primary);
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}
.wa-board-toolbar .wa-board-publish { margin: 8px 8px 8px 0; }
.wa-board-publish:hover,
.wa-board-inline button:hover,
.wa-board-compose button:hover {
  background: var(--wa-primary-hover);
}
.wa-board-feed { display: flex; flex-direction: column; flex: 1 1 auto; }
.wa-board-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px 14px;
  padding: 16px clamp(16px, 3vw, 40px);
  border-bottom: 1px solid var(--wa-line);
  text-decoration: none;
  color: inherit;
}
.wa-board-item:last-child { border-bottom: 0; }
.wa-board-item:hover { background: color-mix(in srgb, var(--wa-soft) 70%, var(--wa-paper)); }
.wa-board-item:hover .wa-board-title { color: var(--wa-primary); }
.wa-board-item-body { min-width: 0; }
.wa-board-item-stats {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 2px;
}
.wa-board-stat {
  display: grid;
  justify-items: center;
  min-width: 44px;
  padding: 6px 8px;
  border-radius: 8px;
  background: var(--wa-soft);
  color: var(--wa-muted);
  font-size: 11px;
  line-height: 1.2;
}
.wa-board-stat em {
  font-style: normal;
  font-size: 15px;
  font-weight: 750;
  color: var(--wa-ink);
}
.wa-board-delete {
  border: 1px solid var(--wa-line);
  background: var(--wa-paper);
  color: var(--wa-muted);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 650;
  cursor: pointer;
}
.wa-board-delete:hover {
  color: var(--wa-danger-ink);
  border-color: var(--wa-danger-border);
  background: var(--wa-danger-bg);
}
.wa-board-article-hd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.wa-board-article-hd .wa-board-back { margin-bottom: 0; }
.wa-board-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--wa-soft);
}
.wa-board-item > .wa-board-avatar { width: 40px; height: 40px; }
.wa-board-avatar-lg { width: 40px; height: 40px; }
.wa-board-title {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.4;
}
.wa-board-excerpt {
  margin: 0 0 8px;
  color: var(--wa-muted);
  font-size: 13px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.wa-board-item-meta,
.wa-board-meta,
.wa-board-byline time,
.wa-board-comment time,
.wa-board-reply time {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--wa-muted);
  font-size: 12px;
  line-height: 1.5;
}
.wa-board-tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--wa-primary) 10%, transparent);
  color: var(--wa-primary);
  font-size: 12px;
  font-weight: 650;
}
.wa-board-article,
.wa-board-compose,
.wa-board-comments {
  padding: 22px clamp(16px, 3vw, 40px) 24px;
}
.wa-board-article,
.wa-board-compose {
  flex: 1 1 auto;
}
.wa-board-comments {
  margin: 0;
  border-top: 1px solid var(--wa-line);
  background: color-mix(in srgb, var(--wa-soft) 45%, var(--wa-paper));
}
.wa-board-back {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--wa-link);
  text-decoration: none;
  font-size: 13px;
}
.wa-board-article h1 {
  margin: 0 0 12px;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
  line-height: 1.3;
}
.wa-board-byline,
.wa-board-person,
.wa-board-comment-hd {
  display: flex;
  align-items: center;
  gap: 8px;
}
.wa-board-name { font-weight: 650; font-size: 14px; }
.wa-board-official {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin-left: 4px;
  padding: 1px 6px 1px 4px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--wa-primary, #0052d9) 14%, transparent);
  color: var(--wa-primary, #0052d9);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.04em;
  line-height: 1.3;
  vertical-align: middle;
}
.wa-board-official svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
}
.wa-board-authorcard strong .wa-board-official,
.wa-board-item-meta .wa-board-official {
  margin-left: 6px;
}
.wa-board-login,
.wa-board-authorcard span,
.wa-board-authorcard em,
.wa-board-authorcard time {
  color: var(--wa-muted);
  font-size: 12px;
  font-style: normal;
}
.wa-board-authorcard {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
  padding: 10px 12px;
  border: 1px solid var(--wa-line);
  border-radius: 10px;
  background: var(--wa-soft);
}
.wa-board-authorcard strong {
  display: block;
  font-size: 15px;
}
.wa-board-authorcard div { display: grid; gap: 2px; }
.wa-board-body {
  margin: 18px 0;
  font-size: 16px;
  line-height: 1.75;
}
.wa-board-reacts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.wa-board-like,
.wa-board-emoji,
.wa-board-textbtn {
  border: 1px solid var(--wa-line);
  background: var(--wa-paper);
  color: var(--wa-ink);
  border-radius: 999px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 12px;
}
.wa-board-like.is-on,
.wa-board-emoji.is-on,
.wa-board-textbtn.is-on {
  border-color: color-mix(in srgb, var(--wa-primary) 40%, var(--wa-line));
  color: var(--wa-primary);
  background: color-mix(in srgb, var(--wa-primary) 8%, var(--wa-paper));
}
.wa-board-comments h2 { font-size: 1rem; margin: 0 0 12px; }
.wa-board-comment,
.wa-board-reply {
  padding: 14px 0;
  border-top: 1px solid var(--wa-line);
}
.wa-board-comment p,
.wa-board-reply p {
  margin: 8px 0 0;
  line-height: 1.65;
}
.wa-board-comment-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}
.wa-board-replies {
  margin: 10px 0 0 36px;
  padding-left: 12px;
  border-left: 2px solid var(--wa-line);
}
.wa-board-inline {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}
.wa-board-inline textarea,
.wa-board-compose input,
.wa-board-compose textarea,
.wa-board-compose select {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--wa-line);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--wa-paper);
  color: var(--wa-ink);
  font: inherit;
}
.wa-board-inline textarea { min-height: 72px; resize: vertical; }
.wa-board-compose { display: grid; gap: 14px; }
.wa-board-compose h1 { margin: 0; font-size: 1.25rem; }
.wa-board-compose label { display: grid; gap: 6px; font-size: 13px; color: var(--wa-muted); }
.wa-board-editor-wrap {
  border: 1px solid var(--wa-line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--wa-paper);
}
.wa-board-editor-wrap .ql-toolbar.ql-snow {
  border: 0;
  border-bottom: 1px solid var(--wa-line);
}
.wa-board-editor-wrap .ql-container.ql-snow {
  border: 0;
  min-height: 240px;
  font-size: 16px;
}
.wa-board-prose {
  font-size: 16px;
  line-height: 1.75;
}
.wa-board-prose img,
.wa-board-editor-wrap img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
}
html[data-theme="dark"] .wa-board-shell {
  box-shadow: none;
}
html[data-theme="dark"] .wa-board-editor-wrap .ql-snow,
html[data-theme="dark"] .wa-board-editor-wrap .ql-editor {
  color: var(--wa-ink);
}
html[data-theme="dark"] .wa-board-editor-wrap .ql-stroke { stroke: var(--wa-muted); }
html[data-theme="dark"] .wa-board-editor-wrap .ql-fill { fill: var(--wa-muted); }
html[data-theme="dark"] .wa-board-editor-wrap .ql-picker { color: var(--wa-ink); }
.wa-board-compose-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.wa-board-compose-actions a { color: var(--wa-muted); text-decoration: none; }
@media (max-width: 720px) {
  .wa-board { padding: 0; }
  .wa-board-shell {
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }
  .wa-board-toolbar,
  .wa-board-bar { padding-right: 10px; }
  .wa-board-tab { padding: 10px 10px 8px; font-size: 13px; }
  .wa-board-tab-mark { width: 26px; height: 26px; }
  .wa-board-toolbar .wa-board-publish {
    padding: 7px 10px;
    font-size: 13px;
  }
  .wa-board-item {
    grid-template-columns: 36px minmax(0, 1fr);
    padding: 14px 14px;
  }
  .wa-board-item > .wa-board-avatar { width: 36px; height: 36px; }
  .wa-board-item-stats {
    grid-column: 2;
    justify-content: flex-start;
  }
  .wa-board-article,
  .wa-board-compose,
  .wa-board-comments { padding: 16px 14px 20px; }
  .wa-board-notice,
  .wa-board-pulse,
  .wa-board-starters { padding-left: 14px; padding-right: 14px; }
  .wa-board-starter { max-width: 100%; }
  .wa-board-replies { margin-left: 12px; }
}

/* Homepage module rhythm + motion kill-switch (see assets/home.css) */
body[data-wa-page="home"] .wa-home-sec {
  padding-top: 72px;
  padding-bottom: 72px;
}
@media (max-width: 960px) {
  body[data-wa-page="home"] .wa-home-sec {
    padding-top: 56px;
    padding-bottom: 56px;
  }
}
@media (prefers-reduced-motion: reduce) {
  body[data-wa-page="home"] .wa-home-card,
  body[data-wa-page="home"] .wa-front-stat,
  body[data-wa-page="home"] .wa-sol-node,
  body[data-wa-page="home"] .sysmap-story {
    transition: none;
    transform: none;
  }
  body[data-wa-page="home"] .wa-home-reveal,
  body[data-wa-page="home"] .wa-era-node,
  body[data-wa-page="home"] .wa-era-mark::after,
  body[data-wa-page="home"] .wa-era-node.is-now .wa-era-dot {
    animation: none !important;
    opacity: 1;
    transform: none;
  }
}