/* Cheapcoding News — 报纸编辑风
   tokens: 冷纸白 / 墨黑 / 印泥朱砂 / 批注灰 / 米色界线 */
:root {
  color-scheme: light;
  --paper: #fbfaf7;
  --ink: #1c1b17;
  --cinnabar: #ae2f24;
  --cinnabar-bright: #c8402f;
  --gloss: #5c5a52;
  --rule: #ddd8cc;
  --panel: #f4f1e8;
  --font-display: Constantia, "Palatino Linotype", Georgia, "Noto Serif SC", serif;
  --font-body-en: Georgia, "Times New Roman", "Noto Serif SC", serif;
  --font-zh-serif: "Noto Serif SC", "Source Han Serif SC", Georgia, SimSun, serif;
  --font-kai: KaiTi, STKaiti, "Noto Serif SC", serif;
  --font-ui: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  --font-data: Consolas, "Cascadia Mono", "Courier New", monospace;
  --measure: 44rem;
}

* { box-sizing: border-box; }

html { background: var(--paper); scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body-en);
  font-size: 1.0625rem;
  line-height: 1.65;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration-color: var(--rule); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--cinnabar); }

::selection { background: var(--cinnabar); color: var(--paper); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--rule); border: 2px solid var(--paper); }
::-webkit-scrollbar-thumb:hover { background: var(--gloss); }

:focus-visible { outline: 2px solid var(--cinnabar); outline-offset: 2px; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: var(--paper); padding: 0.5rem 1rem;
  font-family: var(--font-ui); font-size: 0.875rem; z-index: 30;
}
.skip-link:focus { left: 0; }

/* ── 阅读进度（文章页由 JS 激活） ───────────────────── */
.read-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 100%;
  transform: scaleX(0); transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cinnabar), var(--cinnabar-bright));
  z-index: 25; pointer-events: none; visibility: hidden;
}
.read-progress.is-on { visibility: visible; }

/* ── 样张印章：预览数据标识 ─────────────────────────── */
.demo-stamp {
  position: fixed; right: 1rem; top: 1rem; z-index: 20;
  border: 1px solid var(--cinnabar); color: var(--cinnabar);
  font-family: var(--font-kai); font-weight: 700;
  font-size: 0.95rem; line-height: 1.3; letter-spacing: 0.32em;
  padding: 0.45rem 0.34rem 0.45rem 0.6rem;
  writing-mode: vertical-rl; text-orientation: upright;
  transform: rotate(5deg); opacity: 0.72; pointer-events: none;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
}
.demo-stamp span {
  display: block; font-size: 0.6875rem; letter-spacing: 0.2em; font-weight: 400;
  margin-top: 0.4rem;
}

/* ── 报头 ───────────────────────────────────────────── */
.masthead {
  border-bottom: 3px double var(--ink);
  background: radial-gradient(ellipse 80% 100% at 50% 0%, #fffef8, transparent 75%);
}

.masthead-brand {
  display: flex; align-items: center; justify-content: center; gap: 1.2rem;
  max-width: 72rem; margin: 0 auto; padding: 2.2rem 1.25rem 1.3rem;
}

.brandmark { flex: none; width: 3.7rem; height: 3.7rem; }
.brandmark .bm-bridge { transition: transform 0.3s ease; }
.brandmark:hover .bm-bridge { transform: translateX(4px); }

.masthead-kicker {
  margin: 0; font-family: var(--font-ui); font-size: 0.75rem;
  letter-spacing: 0.42em; color: var(--gloss);
  display: flex; align-items: center; justify-content: center; gap: 0.9rem;
}
.kicker-rule {
  flex: none; width: 3.6rem; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gloss));
}
.kicker-rule.is-end { background: linear-gradient(90deg, var(--gloss), transparent); }

.logotype {
  margin: 0.15rem 0 0; font-family: var(--font-display);
  font-size: clamp(2rem, 5.5vw, 3.5rem); font-weight: 700;
  letter-spacing: -0.015em; line-height: 1.05; text-align: center;
}
.logotype a {
  text-decoration: none;
  text-shadow: 0.028em 0.028em 0 rgba(174, 47, 36, 0.22);
  transition: text-shadow 0.3s ease;
}
.logotype a:hover { text-shadow: -0.028em 0.028em 0 rgba(174, 47, 36, 0.34); }

.dateline {
  margin: 0.55rem 0 0; font-family: var(--font-data);
  font-size: 0.8125rem; color: var(--gloss); text-align: center;
}
.dateline-sep { margin: 0 0.4rem; color: var(--rule); }

.topnav {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  max-width: 72rem; margin: 0 auto; padding: 0.55rem 1.25rem;
  border-top: 1px solid var(--rule);
  font-family: var(--font-ui); font-size: 0.875rem;
}

.topnav-links { display: flex; gap: 1.4rem; }
.topnav-links a { text-decoration: none; padding: 0.2rem 0; border-bottom: 2px solid transparent; transition: border-color 0.2s ease; }
.topnav-links a:hover { border-bottom-color: var(--rule); }
.topnav-links a.is-active { border-bottom-color: var(--cinnabar); font-weight: 700; }

.mode-switch { display: flex; align-items: center; gap: 0.35rem; }
.mode-label, .filter-label {
  font-family: var(--font-ui); font-size: 0.75rem; color: var(--gloss);
  margin-right: 0.25rem;
}

.mode-switch button, .chip {
  font-family: var(--font-ui); font-size: 0.8125rem;
  background: none; border: 1px solid var(--rule); color: var(--ink);
  padding: 0.25rem 0.7rem; cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.1s ease;
}
.mode-switch button[aria-pressed="true"], .chip[aria-pressed="true"] {
  background: var(--ink); border-color: var(--ink); color: var(--paper);
}
.mode-switch button:hover, .chip:hover { border-color: var(--ink); }
.mode-switch button:active, .chip:active { transform: scale(0.94); }

/* ── 版面容器 ───────────────────────────────────────── */
.page { max-width: 72rem; margin: 0 auto; padding: 1.6rem 1.25rem 3rem; }

.issue-notice {
  font-family: var(--font-ui); font-size: 0.875rem;
  background: var(--panel); border-left: 3px solid var(--cinnabar);
  padding: 0.6rem 0.9rem; margin: 0 0 1.4rem;
}

.filter-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem;
  padding-bottom: 1.1rem; margin-bottom: 1.6rem;
  border-bottom: 1px solid var(--rule);
}

/* ── 标题划线动效（贯穿首页/归档） ──────────────────── */
.lead-title a, .card-title a { text-decoration: none; }
.lead-title a .lang-en, .card-title a .lang-en {
  background-image: linear-gradient(var(--cinnabar), var(--cinnabar));
  background-size: 0% 2px; background-repeat: no-repeat; background-position: 0 100%;
  transition: background-size 0.28s ease, color 0.2s ease;
  padding-bottom: 2px;
}
.lead-title a:hover .lang-en, .card-title a:hover .lang-en {
  background-size: 100% 2px; color: var(--cinnabar);
}
html[data-mode="zh"] .lead-title a:hover .lang-zh,
html[data-mode="zh"] .card-title a:hover .lang-zh { color: var(--cinnabar); }

/* ── 首页版面 ───────────────────────────────────────── */
.front {
  display: grid; grid-template-columns: 1.8fr 1fr; gap: 2rem;
  padding-bottom: 1.8rem; border-bottom: 1px solid var(--rule);
}

.front-side {
  display: flex; flex-direction: column; gap: 1.5rem;
  border-left: 1px solid var(--rule); padding-left: 2rem;
}

.card-meta {
  margin: 0 0 0.45rem; display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.7rem;
  font-family: var(--font-ui); font-size: 0.75rem; color: var(--gloss);
}

.source-tag {
  color: var(--cinnabar); font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase;
}

.read-time, .pub-time { font-family: var(--font-data); }

.lead-title {
  margin: 0 0 0.6rem; font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.2vw, 2.35rem); line-height: 1.18; font-weight: 700;
}

.lead-figure { display: block; margin: 0 0 0.9rem; overflow: hidden; }
.lead-figure img { transition: transform 0.6s ease; }
.lead-figure:hover img { transform: scale(1.025); }

.lead-summary { margin: 0; color: #3c3a33; }

.card {
  border-top: 1px solid var(--rule); padding-top: 0.9rem;
  transition: border-color 0.25s ease;
}
.card:hover { border-top-color: var(--cinnabar); }
.front-side .card:first-child { border-top: 0; padding-top: 0; }

.card-title {
  margin: 0 0 0.4rem; font-family: var(--font-display);
  font-size: 1.2rem; line-height: 1.28; font-weight: 700;
}

.card-summary { margin: 0; font-size: 0.9375rem; color: #3c3a33; }

.front-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem;
  padding: 1.6rem 0 1.8rem; border-bottom: 1px solid var(--rule);
}
.front-row .card { border-top: 0; padding-top: 0; }
.front-row .card:hover { border-top-color: transparent; }

/* 双语标题/摘要在列表中的排布 */
.lang-zh { font-family: var(--font-zh-serif); }
.lead-title .lang-zh, .card-title .lang-zh {
  display: block; font-size: 0.72em; font-weight: 400; color: var(--gloss);
  margin-top: 0.3em;
}
.lead-summary .lang-zh, .card-summary .lang-zh, .brief-title .lang-zh, .archive-lead .lang-zh {
  display: block; font-size: 0.925em; color: var(--gloss); margin-top: 0.2em;
}
.lead-title .lang-en, .card-title .lang-en, .lead-summary .lang-en,
.card-summary .lang-en, .brief-title .lang-en, .archive-lead .lang-en { display: block; }

/* ── 阅读模式：整站生效 ─────────────────────────────── */
html[data-mode="en"] .lang-zh { display: none; }
html[data-mode="zh"] .lang-en { display: none; }
html[data-mode="zh"] .lead-title .lang-zh, html[data-mode="zh"] .card-title .lang-zh {
  font-size: 1em; color: var(--ink); font-weight: 700; margin-top: 0;
}

.mode-fade .page { opacity: 0; }
.page { transition: opacity 0.16s ease; }

/* ── 简讯 ───────────────────────────────────────────── */
.section-title {
  font-family: var(--font-ui); font-size: 0.8125rem; letter-spacing: 0.3em;
  color: var(--cinnabar); font-weight: 700; margin: 1.8rem 0 0.9rem;
  display: flex; align-items: center; gap: 0.8rem;
}
.section-title::after {
  content: ""; flex: 1; height: 1px;
  background: linear-gradient(90deg, var(--rule), transparent);
}

.brief-list {
  list-style: none; margin: 0; padding: 0;
  columns: 2; column-gap: 2.5rem; column-rule: 1px solid var(--rule);
}
.brief-list li {
  break-inside: avoid; padding: 0.55rem 0; border-bottom: 1px dotted var(--rule);
}
.brief-title { display: block; margin-top: 0.15rem; }

.issue-nav {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem;
  margin-top: 2rem; font-family: var(--font-data); font-size: 0.8125rem;
}
.issue-link { padding: 0.15rem 0.4rem; transition: background 0.18s ease, color 0.18s ease; }
.issue-link:hover { background: var(--panel); }
.issue-link.is-current { background: var(--ink); color: var(--paper); }

/* ── 文章页 ─────────────────────────────────────────── */
.story { max-width: var(--measure); margin: 0 auto; }

.crumb { font-family: var(--font-ui); font-size: 0.8125rem; margin: 0 0 1.4rem; }
.crumb a { text-decoration: none; color: var(--gloss); transition: color 0.18s ease; }
.crumb a:hover { color: var(--cinnabar); }

.story-title {
  margin: 0.2rem 0 0.5rem; font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.6rem); line-height: 1.15; font-weight: 700;
}
.story-title .lang-en, .story-title .lang-zh { display: block; }
.story-title-zh {
  font-size: 0.58em; font-weight: 400; color: var(--gloss); margin-top: 0.45em;
}
html[data-mode="zh"] .story-title-zh { font-size: 1em; color: var(--ink); font-weight: 700; margin-top: 0; }

.byline { font-family: var(--font-ui); font-size: 0.875rem; color: var(--gloss); margin: 0 0 0.9rem; }

.tts-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem;
  border: 1px solid var(--rule); background: var(--panel);
  padding: 0.5rem 0.8rem; margin: 0 0 1.4rem;
  font-family: var(--font-ui); font-size: 0.8125rem;
}
.tts-bar button {
  font-family: var(--font-ui); font-size: 0.8125rem; cursor: pointer;
  border: 1px solid var(--ink); background: var(--paper); padding: 0.25rem 0.7rem;
  transition: background 0.18s ease, color 0.18s ease, transform 0.1s ease;
}
.tts-bar button:hover { background: var(--ink); color: var(--paper); }
.tts-bar button:active { transform: scale(0.94); }
.tts-rate select { font-family: var(--font-ui); font-size: 0.8125rem; }

.story-figure { margin: 0 0 1.4rem; overflow: hidden; }
.story-figure img { transition: transform 0.6s ease; }
.story-figure:hover img { transform: scale(1.02); }
.story-figure figcaption {
  font-family: var(--font-ui); font-size: 0.75rem; color: var(--gloss); padding-top: 0.35rem;
}

.story-summary {
  background: var(--panel); border-top: 2px solid var(--ink);
  padding: 0.9rem 1.1rem; margin-bottom: 1.8rem;
}
.story-summary p { margin: 0.3rem 0 0; }
.panel-title {
  margin: 0; font-family: var(--font-ui); font-size: 0.75rem;
  letter-spacing: 0.3em; color: var(--gloss);
}

/* 首字下沉：正文第一段 */
.story-body .pair:first-child .para-en::first-letter {
  font-family: var(--font-display);
  font-size: 3.1em; font-weight: 700; color: var(--cinnabar);
  float: left; line-height: 0.82; padding: 0.06em 0.12em 0 0;
}

/* 批注体译文：左侧朱砂刻度 + 「译」标 */
.pair { margin-bottom: 1.5rem; }
.para-en { margin: 0; }

.gloss {
  margin: 0.55rem 0 0; padding-left: 1rem;
  border-left: 2px solid var(--cinnabar);
  font-family: var(--font-zh-serif); font-size: 0.9375rem;
  line-height: 1.9; color: var(--gloss);
}
.gloss-mark {
  display: inline-block; font-size: 0.6875rem; color: var(--cinnabar);
  border: 1px solid var(--cinnabar); line-height: 1;
  padding: 0.1rem 0.2rem; margin-right: 0.5rem; vertical-align: 0.12em;
  font-family: var(--font-kai);
}
html[data-mode="zh"] .gloss {
  border-left-color: var(--rule); color: var(--ink); font-size: 1.0625rem; padding-left: 0;
  border-left-width: 0;
}
html[data-mode="zh"] .gloss-mark { display: none; }

.para-listen {
  font-family: var(--font-ui); font-size: 0.6875rem; color: var(--gloss);
  background: none; border: 1px dotted var(--rule); cursor: pointer;
  padding: 0.1rem 0.45rem; margin-top: 0.35rem;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.para-listen:hover { color: var(--cinnabar); border-color: var(--cinnabar); }
.para-listen.is-playing {
  color: var(--paper); background: var(--cinnabar); border-color: var(--cinnabar);
  animation: listen-pulse 1.6s ease-in-out infinite;
}
@keyframes listen-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.72; }
}

/* ── 学习区 ─────────────────────────────────────────── */
.learn { margin-top: 2.2rem; }

.vocab { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.vocab th {
  font-family: var(--font-ui); font-size: 0.75rem; color: var(--gloss);
  text-align: left; font-weight: 400; letter-spacing: 0.15em;
  border-bottom: 1px solid var(--ink); padding: 0.3rem 0.6rem 0.3rem 0;
}
.vocab td {
  border-bottom: 1px dotted var(--rule); padding: 0.5rem 0.6rem 0.5rem 0;
  vertical-align: top;
}
.vocab tr { transition: background 0.15s ease; }
.vocab tbody tr:hover { background: var(--panel); }
.vocab td:not(.vocab-word):not(.vocab-example) { font-family: var(--font-zh-serif); }
.vocab-word { font-weight: 700; }
.vocab-phonetic { font-family: var(--font-data); font-size: 0.8125rem; color: var(--gloss); }
.vocab-example { font-style: italic; color: #3c3a33; }

.collocations { margin: 0; }
.collocation { border-bottom: 1px dotted var(--rule); padding: 0.55rem 0; }
.collocation dt { font-weight: 700; }
.collocation dd {
  margin: 0.15rem 0 0; font-family: var(--font-zh-serif);
  font-size: 0.9375rem; color: var(--gloss);
}
.collocation-example {
  display: block; font-family: var(--font-body-en); font-style: italic;
  color: #3c3a33; margin-top: 0.15rem;
}

.sentence-note {
  border-left: 2px solid var(--ink); padding: 0.2rem 0 0.2rem 1rem; margin-bottom: 1.3rem;
  transition: border-color 0.25s ease;
}
.sentence-note:hover { border-left-color: var(--cinnabar); }
.sentence-en { margin: 0; font-style: italic; }
.sentence-analysis {
  margin: 0.45rem 0 0; font-family: var(--font-zh-serif);
  font-size: 0.9375rem; line-height: 1.85;
}

.story-foot {
  margin-top: 2.4rem; padding-top: 0.8rem; border-top: 3px double var(--ink);
  font-family: var(--font-ui); font-size: 0.8125rem; color: var(--gloss);
}

/* ── 归档页 ─────────────────────────────────────────── */
.archive-list { list-style: none; margin: 0; padding: 0; max-width: var(--measure); }
.archive-entry {
  display: grid; grid-template-columns: auto 1fr; gap: 0.2rem 1.2rem;
  align-items: baseline; padding: 0.85rem 0; border-bottom: 1px solid var(--rule);
  transition: background 0.18s ease;
}
.archive-entry:hover { background: var(--panel); }
.archive-date { font-family: var(--font-data); font-size: 0.9375rem; text-decoration: none; color: var(--cinnabar); }
.archive-date:hover { text-decoration: underline; }
.archive-lead { font-family: var(--font-display); font-weight: 700; }
.archive-count {
  grid-column: 2; font-family: var(--font-ui); font-size: 0.75rem; color: var(--gloss);
}

/* ── 页脚 ───────────────────────────────────────────── */
.footer {
  border-top: 3px double var(--ink); margin-top: 1rem;
  padding: 1.2rem 1.25rem 2.4rem; max-width: 72rem; margin-inline: auto;
  font-family: var(--font-ui); font-size: 0.75rem; color: var(--gloss);
}
.footer p { margin: 0.3rem 0; }

/* ── 隐藏 ───────────────────────────────────────────── */
[hidden] { display: none !important; }

.lang-en, .lang-zh { transition: opacity 0.18s ease; }

/* ── 入场与滚动渐显（仅在允许动效时） ───────────────── */
@media (prefers-reduced-motion: no-preference) {
  .masthead-brand { animation: masthead-in 0.7s ease both; }
  @keyframes masthead-in {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: none; }
  }
  .brandmark .bm-bridge { animation: bridge-in 0.6s cubic-bezier(0.2, 1, 0.3, 1) 0.35s backwards; }
  @keyframes bridge-in {
    from { opacity: 0; transform: translateX(-14px); }
    to { opacity: 1; transform: none; }
  }
  .reveal { opacity: 0; transform: translateY(14px); }
  .reveal.is-in {
    opacity: 1; transform: none;
    transition: opacity 0.55s ease, transform 0.55s ease;
    transition-delay: var(--reveal-delay, 0s);
  }
  .read-progress { transition: transform 0.08s linear; }
}

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

/* ── 响应式 ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .front { grid-template-columns: 1fr; }
  .front-side { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); padding-top: 1.4rem; }
  .front-row { grid-template-columns: 1fr 1fr; }
  .brief-list { columns: 1; }
}

@media (max-width: 600px) {
  body { font-size: 1rem; }
  .masthead-brand { padding: 1.6rem 1rem 1rem; gap: 0.9rem; }
  .brandmark { width: 3rem; height: 3rem; }
  .topnav { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .front-row { grid-template-columns: 1fr; }
  .demo-stamp { font-size: 0.8125rem; right: 0.5rem; top: 0.5rem; }
  .page { padding: 1.2rem 1rem 2.4rem; }
  .kicker-rule { width: 2rem; }
}