/* 地推吧 — layout & theme */
:root {
  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Serif SC", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  --bg: #eef1f4;
  --bg-elevated: #f7f8fa;
  --ink: #12161c;
  --muted: #5a6573;
  --line: rgba(18, 22, 28, 0.1);
  --accent: #0d8f7a;
  --accent-soft: rgba(13, 143, 122, 0.12);
  --header-bg: rgba(238, 241, 244, 0.86);
  --sidebar-bg: #f7f8fa;
  --player-bg: #0b0e12;
  --shadow: 0 18px 50px rgba(18, 22, 28, 0.08);
  --radius: 14px;
  --header-h: 7.5rem;
  --sidebar-w: 17.5rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-theme="dark"] {
  --bg: #0c1016;
  --bg-elevated: #141a22;
  --ink: #e8edf4;
  --muted: #9aa6b5;
  --line: rgba(232, 237, 244, 0.1);
  --accent: #2ec4a8;
  --accent-soft: rgba(46, 196, 168, 0.16);
  --header-bg: rgba(12, 16, 22, 0.88);
  --sidebar-bg: #10161e;
  --player-bg: #05070a;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 50% -10%, var(--accent-soft), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 100%);
  background-attachment: fixed;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.is-nav-open {
  overflow: hidden;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  padding: 0.5rem 0.85rem;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
}
.skip-link:focus {
  top: 0.75rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 1.15rem 1.25rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem;
}

.brand {
  text-align: center;
  grid-column: 1 / -1;
  grid-row: 1;
  justify-self: center;
  max-width: calc(100% - 4rem);
  animation: rise 0.7s var(--ease) both;
  pointer-events: none;
}

.brand-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: 0.18em;
  line-height: 1.15;
  text-indent: 0.18em;
  pointer-events: auto;
}

.brand-sub {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: clamp(0.85rem, 2.2vw, 1rem);
  letter-spacing: 0.04em;
  pointer-events: auto;
}

.theme-toggle,
.nav-fab {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  color: var(--ink);
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.theme-toggle:hover,
.nav-fab:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.theme-toggle {
  width: 2.75rem;
  height: 2.75rem;
  display: inline-grid;
  place-items: center;
  padding: 0;
  position: relative;
  grid-column: 2;
  grid-row: 1;
  z-index: 1;
  justify-self: end;
}

/* 左下角收放按钮 */
.nav-fab {
  position: fixed;
  left: max(0.9rem, env(safe-area-inset-left));
  bottom: max(0.9rem, env(safe-area-inset-bottom));
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.85rem;
  padding: 0.55rem 0.95rem 0.55rem 0.75rem;
  box-shadow: var(--shadow);
  background: color-mix(in srgb, var(--bg-elevated) 92%, var(--accent));
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.nav-fab-icon,
.nav-fab-icon::before,
.nav-fab-icon::after {
  display: block;
  width: 1rem;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  position: relative;
  transition: transform 0.25s var(--ease), opacity 0.2s;
}
.nav-fab-icon::before,
.nav-fab-icon::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-fab-icon::before { top: -5px; }
.nav-fab-icon::after { top: 5px; }

.nav-fab[aria-expanded="true"] .nav-fab-icon {
  background: transparent;
}
.nav-fab[aria-expanded="true"] .nav-fab-icon::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-fab[aria-expanded="true"] .nav-fab-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-fab-label {
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.theme-icon {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  position: absolute;
  transition: opacity 0.3s, transform 0.3s var(--ease);
}
.theme-icon-sun {
  background: conic-gradient(from 0deg, #f0b429, #f0b429 25%, transparent 25%);
  box-shadow: 0 0 0 2px #f0b429;
  opacity: 1;
  transform: scale(1);
}
.theme-icon-moon {
  background: #c9d4e3;
  box-shadow: inset -4px -2px 0 0 #141a22;
  opacity: 0;
  transform: scale(0.6);
}
html[data-theme="dark"] .theme-icon-sun {
  opacity: 0;
  transform: scale(0.6);
}
html[data-theme="dark"] .theme-icon-moon {
  opacity: 1;
  transform: scale(1);
}

/* Shell */
.shell {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  gap: 0;
  min-height: calc(100vh - var(--header-h));
  transition: grid-template-columns 0.35s var(--ease);
}

.shell.is-collapsed {
  grid-template-columns: 0 minmax(0, 1fr);
}

.shell.is-collapsed .sidebar {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.sidebar {
  position: sticky;
  top: var(--header-h);
  align-self: start;
  height: calc(100vh - var(--header-h));
  overflow: auto;
  padding: 1.1rem 0.85rem 2.5rem 1.1rem;
  background: linear-gradient(180deg, var(--sidebar-bg), transparent 120%);
  border-right: 1px solid var(--line);
  transition: opacity 0.3s var(--ease), visibility 0.3s;
  /* 只用透明度入场，避免 transform 动画盖住收放位移 */
  animation: fade-in 0.75s var(--ease) 0.08s both;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  padding: 0 0.35rem;
}

.sidebar-label {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.toc {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.toc-item {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.55rem;
  align-items: start;
  padding: 0.7rem 0.65rem;
  border-radius: 12px;
  color: inherit;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s, border-color 0.2s, transform 0.2s var(--ease);
}

.toc-item:hover {
  background: var(--accent-soft);
  transform: translateX(2px);
}

.toc-item.is-active {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}

.toc-index {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--accent);
  font-size: 0.85rem;
  line-height: 1.5;
}

.toc-text {
  font-size: 0.92rem;
  line-height: 1.45;
}

.sidebar-backdrop {
  display: none;
}

.main {
  padding: 1.25rem 1.25rem 4.5rem;
  animation: rise 0.8s var(--ease) 0.12s both;
}

.episode {
  margin-bottom: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--line);
}

.episode:last-of-type {
  border-bottom: 0;
}

.episode-kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
}

.episode-title {
  margin: 0.35rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  letter-spacing: 0.04em;
  line-height: 1.3;
}

.episode-summary {
  margin: 0 0 1.1rem;
  color: var(--muted);
  max-width: 46rem;
}

.player-wrap {
  position: relative;
  margin-bottom: 1.25rem;
  user-select: none;
  -webkit-user-select: none;
}

.player-stage {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--player-bg);
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 9;
}

.player {
  width: 100%;
  height: 100%;
}

/* 视频下方快进退条（移动端参考布局） */
.player-seek-dock {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.55rem;
  padding: 0.15rem 0;
}

.seek-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.seek-btn {
  appearance: none;
  margin: 0;
  min-height: 2.35rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 4px;
  background: #0a0c10;
  color: #f2f4f7;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}

.seek-btn:hover {
  border-color: var(--accent);
  background: #12161d;
}

.seek-btn:active {
  transform: scale(0.97);
  background: #1a222c;
}

html[data-theme="light"] .seek-btn {
  background: #12161c;
  border-color: rgba(18, 22, 28, 0.55);
  color: #f5f7fa;
}

/* ArtPlayer 手势 HUD */
.player .ap-gesture-hud {
  position: absolute;
  left: 50%;
  top: 42%;
  transform: translate(-50%, -50%);
  z-index: 30;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.62);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  pointer-events: none;
  white-space: nowrap;
  backdrop-filter: blur(4px);
}

.player .ap-brightness-mask {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: #000;
  opacity: 0;
}

@media (max-width: 900px) {
  .player-seek-dock {
    margin-top: 0.65rem;
    justify-content: space-between;
    gap: 0.5rem;
  }

  .seek-btn {
    min-height: 2.55rem;
    padding: 0.45rem 0.65rem;
    font-size: 0.86rem;
    flex: 1 1 auto;
  }

  .seek-group {
    flex: 1 1 0;
  }

  .seek-group .seek-btn {
    width: 100%;
  }
}

.player-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  color: #c5ced9;
  padding: 1.5rem;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 40%, rgba(46, 196, 168, 0.18), transparent 50%),
    var(--player-bg);
  transition: opacity 0.35s;
}

.player-wrap.is-ready .player-placeholder {
  opacity: 0;
}

.player-placeholder .hint {
  margin: 0.4rem 0 0;
  font-size: 0.85rem;
  opacity: 0.75;
}

.player-placeholder code {
  font-size: 0.8rem;
  color: #9fe7d6;
}

.watermark {
  position: absolute;
  right: 0.85rem;
  bottom: 2.6rem;
  z-index: 5;
  pointer-events: none;
  color: rgba(255, 255, 255, 0.38);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.45);
}

.episode-body {
  max-width: 46rem;
  color: var(--ink);
}

.episode-body p {
  margin: 0 0 0.85rem;
}

.episode-body ul {
  margin: 0 0 0.85rem;
  padding-left: 1.2rem;
  color: var(--muted);
}

.site-footer {
  padding: 1.5rem 0 0.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Mobile */
@media (max-width: 900px) {
  :root {
    --header-h: 6.4rem;
  }

  .header-inner {
    min-height: var(--header-h);
    padding: 0.9rem 0.9rem;
  }

  .brand-title {
    letter-spacing: 0.12em;
    text-indent: 0.12em;
  }

  .shell {
    display: block;
  }

  .shell.is-collapsed {
    grid-template-columns: none;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: var(--header-h);
    bottom: 0;
    width: min(86vw, 20rem);
    z-index: 50;
    height: auto;
    max-height: none;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--line);
    box-shadow: var(--shadow);
    animation: none;
    opacity: 1;
    visibility: visible;
    /* 用 left 位移，彻底避开 transform 冲突 */
    transform: none;
    left: -110%;
    transition: left 0.35s var(--ease);
    pointer-events: none;
    -webkit-overflow-scrolling: touch;
  }

  body.is-nav-open .sidebar {
    left: 0;
    pointer-events: auto;
  }

  .shell.is-collapsed .sidebar {
    opacity: 1;
    visibility: visible;
    pointer-events: none;
    left: -110%;
    transform: none;
  }

  body.is-nav-open .shell.is-collapsed .sidebar {
    left: 0;
    pointer-events: auto;
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: var(--header-h) 0 0 0;
    z-index: 45;
    background: rgba(8, 10, 14, 0.45);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
  }

  body.is-nav-open .sidebar-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-fab {
    z-index: 80;
  }

  .main {
    padding: 1rem 0.9rem 4.5rem;
  }

  .watermark {
    bottom: 2.2rem;
    font-size: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* —— 单集页微调 + 全屏修复 —— */
.episode.is-current {
  margin-bottom: 1.25rem;
  padding-bottom: 0;
  border-bottom: 0;
}

.player-stage {
  overflow: visible;
}

.player-stage .player {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--player-bg);
  aspect-ratio: 16 / 9;
}

html.is-player-fs,
body.is-player-fs {
  overflow: hidden !important;
}

body.is-player-fs .nav-fab,
body.is-player-fs .site-header,
body.is-player-fs .sidebar,
body.is-player-fs .sidebar-backdrop {
  visibility: hidden !important;
  pointer-events: none !important;
}

.watermark {
  bottom: 3rem;
  z-index: 3;
}