:root {
  --bg: #f7f3ea; --fg: #2b2620; --muted: #8a7f70; --line: #e4dccb; --accent: #8c4a2f; --panel: #fffdf8;
  --screen-bg: #eceef1; --screen-edge: #7a8bb0; --screen-fg: #262a33; --subaru: #6b4bb5; --inner: #6d6458;
  --fs: 19px; --lh: 1.95; --cpl: 46;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font: var(--serif);
}
[data-theme="white"] { --bg: #fff; --fg: #222; --muted: #888; --line: #eee; --accent: #3b5bdb; --panel: #fff;
  --screen-bg: #f3f5fa; --screen-edge: #8ea0d0; --screen-fg: #23283a; --subaru: #7048c0; --inner: #666; }
[data-theme="green"] { --bg: #e3eddc; --fg: #26301f; --muted: #6d7a63; --line: #cbd8c0; --accent: #4f6b3a; --panel: #eef5e9;
  --screen-bg: #d8e3dc; --screen-edge: #6f8f86; --screen-fg: #1f2a24; --subaru: #6a4c9c; --inner: #56624e; }
[data-theme="night"] { --bg: #0e0b10; --fg: #d6d0d8; --muted: #7d7480; --line: #2a2230; --accent: #b58cff; --panel: #1a1520;
  --screen-bg: #1b2131; --screen-edge: #6f82bd; --screen-fg: #e8ecf6; --subaru: #cdb6ff; --inner: #a79db0; }
[data-font="sans"] { --font: var(--sans); }

/* 主题色：default 跟随背景配色；角色色统一替换强调色、荧幕标记与昴的内心 */
[data-accent="emilia"] { --c: #7b68b5; }
[data-accent="rem"] { --c: #4a7fc1; }
[data-accent="ram"] { --c: #cf5f86; }
[data-accent="beatrice"] { --c: #b3832a; }
[data-accent="subaru"] { --c: #b53a3a; }
[data-theme="night"][data-accent="emilia"] { --c: #a796e0; }
[data-theme="night"][data-accent="rem"] { --c: #79a8e6; }
[data-theme="night"][data-accent="ram"] { --c: #ec8fae; }
[data-theme="night"][data-accent="beatrice"] { --c: #d9ac52; }
[data-theme="night"][data-accent="subaru"] { --c: #e07070; }
[data-accent]:not([data-accent="default"]) {
  --accent: var(--c); --screen-edge: var(--c); --subaru: var(--c);
  --screen-bg: color-mix(in srgb, var(--c) 9%, var(--bg));
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--font); transition: background .3s, color .3s; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: var(--accent); }

/* 阅读页顶栏 + 放映进度条；顶栏随下滑收起，进度条留在屏幕顶端 */
.top { position: fixed; top: 0; left: 0; right: 0; z-index: 10; transition: transform .25s; }
body.chrome-hidden .top { transform: translateY(-52px); }
header {
  height: 52px; display: flex; align-items: center; gap: 12px; padding: 0 16px;
  background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px);
  font-family: system-ui, sans-serif; font-size: 14px;
}
header .title { flex: 1; text-align: center; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
header > a, header > button { padding: 6px 10px; border-radius: 6px; color: inherit; text-decoration: none; }
header > a:hover, header > button:hover { background: var(--line); }
.jump { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; }
.jump button { padding: 4px 9px; }
.jump button:hover { color: var(--accent); }
.jump span { color: var(--muted); font-variant-numeric: tabular-nums; min-width: 4.8em; text-align: center; }

.scrub { position: relative; height: 10px; cursor: pointer; background: color-mix(in srgb, var(--bg) 88%, transparent); border-bottom: 1px solid var(--line); }
.scrub .track { position: absolute; inset: 3px 0; background: var(--line); }
.scrub i { position: absolute; top: 3px; bottom: 3px; background: var(--screen-edge); opacity: .6; }
.scrub .done { position: absolute; top: 3px; bottom: 3px; left: 0; background: var(--fg); opacity: .12; }
.scrub .here { position: absolute; top: 0; bottom: 0; width: 3px; margin-left: -1px; background: var(--accent); border-radius: 2px; }
.scrub .tip { position: absolute; top: calc(100% + 6px); padding: 3px 8px; border-radius: 4px; background: var(--fg); color: var(--bg);
  font: 12px var(--sans); white-space: nowrap; transform: translateX(-50%); pointer-events: none; display: none; }
.scrub:hover .tip { display: block; }

/* 正文 */
main { max-width: calc(var(--cpl) * 1em + 48px); margin: 0 auto; padding: 130px 24px 80px; font-size: var(--fs); line-height: var(--lh); }
.chapter-head { text-align: center; margin-bottom: 64px; }
.chapter-head .no { letter-spacing: .4em; color: var(--muted); font-size: .8em; }
.chapter-head h1 { font-size: 1.7em; font-weight: 600; margin: .4em 0 .2em; letter-spacing: .08em; }
.chapter-head .en { color: var(--muted); font-style: italic; font-size: .85em; }
.chapter-head::after { content: "❦"; display: block; margin-top: 28px; color: var(--accent); opacity: .6; }
article p { margin: 0 0 1em; text-indent: 2em; text-align: justify; }
article hr { border: 0; text-align: center; margin: 2.4em 0; }
article hr::before { content: "◆ ◆ ◆"; color: var(--muted); letter-spacing: 1em; font-size: .7em; }
article .status { text-align: center; text-indent: 0; color: var(--muted); }
.k-inner { color: var(--inner); }

.screen { position: relative; scroll-margin-top: 90px; }
.screen .k-subaru { color: var(--subaru); }
[data-screen="subtitle"] .screen {
  margin: 1.5em 0; padding-left: 1.1em; border-left: 2px solid color-mix(in srgb, var(--screen-edge) 70%, transparent);
  font-family: var(--sans); font-size: .93em; line-height: 1.85; color: color-mix(in srgb, var(--screen-edge) 35%, var(--fg));
}
[data-screen="subtitle"] .screen::before { content: "▶"; position: absolute; left: -1.7em; top: .35em; font-size: .62em; color: var(--screen-edge); }
[data-screen="subtitle"] .screen p { text-indent: 0; margin-bottom: .7em; }
[data-screen="subtitle"] .screen strong { font-weight: 500; }
[data-screen="card"] .screen {
  margin: 1.6em -1.1em; padding: 1.1em 1.1em .2em;
  background: var(--screen-bg); color: var(--screen-fg); border-left: 3px solid var(--screen-edge); border-radius: 2px 6px 6px 2px;
}
[data-screen="card"] .screen::after { content: "荧幕"; position: absolute; top: .45em; right: .8em; font: 11px var(--sans); letter-spacing: .2em; color: var(--screen-edge); }
[data-screen="card"] .screen p { text-indent: 0; }
[data-screen="card"] .screen strong { font-weight: 600; }
[data-screen="plain"] .screen .k-subaru { color: inherit; }
[data-filter="screen"] article > :not(.screen) { display: none; }
[data-filter="theater"] .screen { display: none; }

.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 80px; font-family: system-ui, sans-serif; font-size: 15px; }
.pager a { flex: 1; padding: 18px; border: 1px solid var(--line); border-radius: 10px; color: var(--fg); text-decoration: none; }
.pager a:hover { border-color: var(--accent); }
.pager a small { display: block; color: var(--muted); margin-bottom: 4px; }
.pager a.next { text-align: right; }

/* 目录抽屉与设置面板 */
.scrim { position: fixed; inset: 0; background: #0006; opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 30; }
.scrim.on { opacity: 1; pointer-events: auto; }
.drawer { position: fixed; top: 0; bottom: 0; left: 0; width: min(340px, 86vw); z-index: 40; overflow-y: auto;
  background: var(--panel); transform: translateX(-100%); transition: transform .25s; font-family: system-ui, sans-serif; }
.drawer.on { transform: none; }
.drawer h2 { font-size: 15px; margin: 0; padding: 20px; border-bottom: 1px solid var(--line); }
.drawer h2 a { color: inherit; text-decoration: none; }
.drawer .chapters a { display: block; padding: 12px 20px; color: var(--fg); text-decoration: none; font-size: 14px; border-bottom: 1px solid var(--line); }
.drawer .chapters a small { color: var(--muted); margin-right: 8px; }
.drawer .chapters a.cur { color: var(--accent); font-weight: 600; }

.settings { position: fixed; right: 16px; top: 70px; z-index: 40; width: 300px; max-width: calc(100vw - 32px); padding: 16px 18px; border-radius: 12px;
  background: var(--panel); border: 1px solid var(--line); box-shadow: 0 10px 30px #0002; font: 13px system-ui, sans-serif; display: none; }
.settings.on { display: block; }
.settings .row { display: flex; align-items: center; justify-content: space-between; margin: 10px 0; }
.settings .opts { display: flex; gap: 6px; align-items: center; }
.settings .opts button { padding: 5px 10px; border: 1px solid var(--line); border-radius: 6px; }
.settings .opts button.on { border-color: var(--accent); color: var(--accent); }
.settings hr { margin: 12px 0; border: 0; border-top: 1px solid var(--line); }
.settings .val { min-width: 2em; text-align: center; }
.settings .note { font-size: 11px; color: var(--muted); text-align: right; margin-top: -4px; }
.swatch { width: 26px; height: 26px; border-radius: 50%; padding: 0 !important; border: 2px solid var(--line) !important; }
.swatch.on { border-color: var(--accent) !important; }
.dot { width: 24px; height: 24px; border-radius: 50%; padding: 0 !important; border: 2px solid var(--panel) !important; box-shadow: 0 0 0 1px var(--line); }
.dot.on { box-shadow: 0 0 0 2px var(--fg); }
.dot[data-accent="default"] { background: conic-gradient(#8c4a2f 0 25%, #3b5bdb 0 50%, #4f6b3a 0 75%, #b58cff 0); }

/* 首页 */
.home { max-width: 760px; margin: 0 auto; padding: 72px 24px 96px; }
.hero { text-align: center; margin-bottom: 56px; }
.hero .eyebrow { font: 13px var(--sans); letter-spacing: .3em; color: var(--muted); }
.hero h1 { font-size: 2.2rem; font-weight: 600; letter-spacing: .06em; margin: .5em 0 .3em; }
.hero .en { color: var(--muted); font-style: italic; }
.hero .meta { margin-top: 14px; font: 13px var(--sans); color: var(--muted); }
.hero::after { content: "❦"; display: block; margin-top: 28px; color: var(--accent); opacity: .6; }
.actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin: 32px 0 0; font-family: var(--sans); }
.actions a { padding: 10px 22px; border-radius: 999px; border: 1px solid var(--accent); text-decoration: none; font-size: 15px; }
.actions a.primary { background: var(--accent); color: var(--bg); }
.intro { line-height: 1.9; font-size: 17px; text-align: justify; }
.intro p { margin: 0 0 1em; text-indent: 2em; }
.home h2 { font: 600 15px var(--sans); letter-spacing: .2em; color: var(--muted); margin: 48px 0 12px; }
.toc { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); font-family: var(--sans); }
.toc a { display: grid; grid-template-columns: 5.5em 1fr auto; align-items: baseline; gap: 12px; padding: 14px 4px; border-bottom: 1px solid var(--line); color: var(--fg); text-decoration: none; }
.toc a:hover { background: color-mix(in srgb, var(--accent) 6%, transparent); }
.toc .no { color: var(--muted); font-size: 14px; }
.toc .zh { font-family: var(--font); font-size: 17px; }
.toc .zh small { display: block; color: var(--muted); font: italic 13px var(--sans); margin-top: 2px; }
.toc .read { font-size: 12px; color: var(--accent); }
.legend { list-style: none; padding: 0; margin: 0; font-size: 15px; line-height: 2; }
.legend b { color: var(--screen-edge); font-weight: 500; margin-right: .6em; }
footer { margin-top: 64px; text-align: center; font: 13px var(--sans); color: var(--muted); }

@media (max-width: 640px) {
  header { gap: 6px; padding: 0 10px; }
  header .title, header .label { display: none; }
  main { padding-left: 16px; padding-right: 16px; }
  .home { padding: 48px 16px 72px; }
  .toc a { grid-template-columns: 4.5em 1fr auto; }
}