:root {
  --canvas: #f3f2ed;
  --surface: #fbfaf6;
  --ink: #18201d;
  --muted: #68716d;
  --line: #d6dad5;
  --accent: #315b50;
  --accent-dark: #23453c;
  --accent-soft: #dfe9e4;
  --danger: #9a3f37;
  --sans: Geist, "SF Pro Display", "Helvetica Neue", "Noto Sans SC", system-ui, sans-serif;
  --mono: "SFMono-Regular", "Roboto Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--canvas); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
svg { width: 1.15rem; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.topbar, .reader-bar { min-height: 64px; padding: 0 clamp(1rem, 4vw, 4rem); border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 1rem; background: rgba(243,242,237,.94); backdrop-filter: blur(16px); position: sticky; top: 0; z-index: 20; }
.wordmark { text-decoration: none; font-weight: 760; letter-spacing: -.04em; }
.topbar-note { color: var(--muted); font: 600 .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.intake-shell { width: min(1320px, calc(100% - 2rem)); margin: 0 auto; padding: clamp(4rem, 10vw, 9rem) 0 clamp(5rem, 10vw, 9rem); display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(360px, .88fr); gap: clamp(3rem, 8vw, 9rem); align-items: start; }
.intro-block { padding-left: clamp(0rem, 7vw, 7rem); }
.eyebrow { display: inline-block; color: var(--accent); font: 700 .7rem/1.2 var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.intro-block h1 { max-width: 18ch; margin: 1.5rem 0 1.6rem; font-size: clamp(2.35rem, 5.2vw, 5.3rem); line-height: 1.02; letter-spacing: -.065em; font-weight: 650; }
.intro-block > p { max-width: 55ch; margin: 0; color: var(--muted); font-size: 1rem; line-height: 1.85; }
.principles { display: flex; flex-wrap: wrap; gap: .55rem 1.2rem; margin-top: 2rem; color: var(--accent-dark); font: 650 .76rem/1.4 var(--mono); }
.principles span::before { content: ""; display: inline-block; width: 5px; height: 5px; margin: 0 .55rem 2px 0; border-radius: 50%; background: var(--accent); }
.intake-panel { background: var(--surface); border: 1px solid var(--line); padding: clamp(1.35rem, 3vw, 2.1rem); box-shadow: 0 24px 60px -44px rgba(39,58,51,.5); }
.panel-heading, .section-heading { display: flex; gap: 1rem; align-items: flex-start; }
.panel-heading h2, .section-heading h2 { margin: 0; font-size: 1.15rem; letter-spacing: -.025em; }
.panel-heading p, .section-heading p { margin: .35rem 0 0; color: var(--muted); font-size: .88rem; }
.step-number { color: var(--accent); font: 650 .7rem/1.5 var(--mono); }
.source-switch { display: grid; grid-template-columns: 1fr 1fr; margin: 2rem 0 1.4rem; border-bottom: 1px solid var(--line); }
.source-switch button { padding: .75rem; border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--muted); cursor: pointer; transition: color .25s ease, border-color .25s ease; }
.source-switch button.active { color: var(--ink); border-color: var(--accent); }
.source-switch button:active, .primary-button:active { transform: translateY(1px); }
.hidden { display: none !important; }
.dropzone { min-height: 220px; border: 1px dashed #a8b4ae; display: grid; place-items: center; align-content: center; gap: .6rem; padding: 2rem; text-align: center; cursor: pointer; transition: border-color .25s ease, background .25s ease; }
.dropzone:hover, .dropzone:focus-within { border-color: var(--accent); background: #f3f7f4; }
.dropzone input { position: absolute; opacity: 0; pointer-events: none; }
.drop-mark { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; display: grid; place-items: center; color: var(--accent); }
.drop-title { font-weight: 650; }
.drop-help, .field-help { color: var(--muted); font-size: .75rem; line-height: 1.5; }
.file-name { min-height: 1.2rem; margin-top: .65rem; color: var(--accent); font: 600 .75rem/1.5 var(--mono); overflow-wrap: anywhere; }
.field-label { display: block; margin-bottom: .5rem; font-size: .82rem; font-weight: 680; }
.text-input { width: 100%; border: 1px solid var(--line); background: var(--canvas); color: var(--ink); padding: .85rem .9rem; outline: 0; transition: border-color .2s ease, box-shadow .2s ease; }
.text-input:focus { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.access-row { display: grid; grid-template-columns: 1fr minmax(120px, .65fr); gap: 1rem; align-items: end; margin-top: 1.5rem; }
.access-row .field-label { margin-bottom: .2rem; }
.inline-error { margin-top: 1rem; padding: .85rem 1rem; border-left: 3px solid var(--danger); background: #f6e8e5; color: var(--danger); font-size: .84rem; line-height: 1.5; }
.primary-button { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-top: 1.3rem; padding: 1rem 1.1rem; border: 1px solid var(--accent); background: var(--accent); color: white; cursor: pointer; transition: background .25s ease, transform .15s ease, opacity .25s ease; }
.primary-button:hover { background: var(--accent-dark); }
.primary-button:disabled { opacity: .65; cursor: wait; }
.primary-button.loading svg { animation: nudge 1s ease-in-out infinite; }
@keyframes nudge { 50% { transform: translateX(4px); } }
.library-section { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; padding: 0 0 8rem; }
.library-section .section-heading { margin-bottom: 2rem; }
.paper-list { border-top: 1px solid var(--line); }
.paper-row { display: grid; grid-template-columns: 46px minmax(0, 1fr) auto 24px; gap: 1rem; align-items: center; min-height: 112px; border-bottom: 1px solid var(--line); text-decoration: none; transition: background .25s ease, padding .25s ease; }
.paper-row:hover { background: var(--surface); padding: 0 1rem; }
.paper-index, .paper-meta { color: var(--muted); font: 600 .72rem/1.4 var(--mono); }
.paper-titles { min-width: 0; }
.paper-titles strong, .paper-titles small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.paper-titles strong { font-size: 1.06rem; }
.paper-titles small { margin-top: .4rem; color: var(--muted); font-size: .78rem; }
.empty-state { display: grid; grid-template-columns: 80px 1fr; gap: 1rem; align-items: start; padding: 3rem 0; border-top: 1px solid var(--line); }
.empty-rule { height: 1px; background: var(--accent); margin-top: .7rem; }
.empty-state p { margin: 0; color: var(--muted); }
.site-footer { min-height: 100px; padding: 2rem clamp(1rem,4vw,4rem); border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); font-size: .76rem; }
.reveal { opacity: 0; transform: translateY(10px); animation: reveal .7s cubic-bezier(.16,1,.3,1) forwards; animation-delay: var(--delay, 0ms); }
@keyframes reveal { to { opacity: 1; transform: translateY(0); } }
.job-shell { width: min(1120px, calc(100% - 2rem)); min-height: calc(100dvh - 64px); margin: 0 auto; padding: clamp(4rem,10vw,8rem) 0; display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(3rem,8vw,8rem); align-items: center; }
.job-copy h1 { margin: 1rem 0; font-size: clamp(2.1rem,4.4vw,4.2rem); line-height: 1.03; letter-spacing: -.055em; }
.job-copy > p { color: var(--muted); line-height: 1.8; }
.progress-track { height: 4px; margin-top: 2.2rem; background: var(--line); overflow: hidden; }
.progress-track span { display: block; height: 100%; background: var(--accent); transition: width .8s cubic-bezier(.16,1,.3,1); }
.progress-meta { display: flex; justify-content: space-between; gap: 1rem; margin-top: .75rem; color: var(--muted); font: 600 .7rem/1.5 var(--mono); }
.paper-skeleton { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; align-items: start; }
.skeleton-page { aspect-ratio: .707; background: #deded9; padding: 12%; }
.skeleton-copy { padding-top: 5%; }
.skeleton-page span, .skeleton-copy span { display: block; height: 8px; margin: 0 0 7%; background: linear-gradient(90deg,#d5d5d0,#ebeae5,#d5d5d0); background-size: 200% 100%; animation: shimmer 1.8s infinite; }
.skeleton-page span:nth-child(1) { height: 14px; width: 75%; }
.skeleton-page span:nth-child(3), .skeleton-copy span:nth-child(4) { width: 84%; }
@keyframes shimmer { to { background-position: -200% 0; } }
.reader-bar { display: grid; grid-template-columns: 180px minmax(0,1fr) auto; }
.reader-title { min-width: 0; display: flex; align-items: center; gap: .7rem; }
.reader-title strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .83rem; }
.reader-title span { color: var(--muted); font: 600 .68rem/1 var(--mono); white-space: nowrap; }
.reader-controls { display: flex; gap: .35rem; }
.reader-controls button, .reader-controls a { border: 1px solid var(--line); background: transparent; padding: .45rem .7rem; color: var(--muted); text-decoration: none; font-size: .75rem; cursor: pointer; }
.reader-controls button.active { border-color: var(--accent); background: var(--accent); color: white; }
.reader-shell { width: min(1500px, calc(100% - 2rem)); margin: 0 auto; display: grid; grid-template-columns: minmax(220px, 300px) minmax(0, 1fr); gap: clamp(2rem,5vw,6rem); padding: 3rem 0 7rem; }
.reader-aside { position: sticky; top: 100px; align-self: start; max-height: calc(100dvh - 120px); overflow-y: auto; padding-right: 1rem; }
.reader-aside h1 { margin: 1rem 0; font-size: clamp(1.5rem,2.4vw,2.35rem); line-height: 1.12; letter-spacing: -.045em; }
.english-title, .authors { color: var(--muted); font-size: .78rem; line-height: 1.65; }
.paper-facts { margin: 2rem 0; border-top: 1px solid var(--line); }
.paper-facts div { display: grid; grid-template-columns: 76px 1fr; padding: .65rem 0; border-bottom: 1px solid var(--line); font-size: .72rem; }
.paper-facts dt { color: var(--muted); font-family: var(--mono); }
.paper-facts dd { margin: 0; overflow-wrap: anywhere; }
.page-nav { display: flex; flex-wrap: wrap; gap: .35rem; }
.page-nav a { width: 32px; height: 32px; display: grid; place-items: center; border: 1px solid var(--line); color: var(--muted); text-decoration: none; font: 600 .68rem/1 var(--mono); }
.page-nav a:hover { border-color: var(--accent); color: var(--accent); }
.paper-page { scroll-margin-top: 90px; margin-bottom: 6rem; }
.page-kicker { display: flex; justify-content: space-between; gap: 1rem; padding: 0 0 .75rem; border-bottom: 1px solid var(--line); color: var(--muted); font: 600 .66rem/1.4 var(--mono); text-transform: uppercase; }
.page-kicker span:last-child { max-width: 65%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.source-layout { display: grid; grid-template-columns: minmax(320px, .92fr) minmax(320px, 1.08fr); gap: clamp(1.2rem,3vw,3.2rem); padding-top: 1.2rem; align-items: start; }
.source-sheet { position: sticky; top: 86px; display: block; width: 100%; padding: 0; border: 1px solid var(--line); background: white; cursor: zoom-in; box-shadow: 0 24px 55px -45px rgba(28,40,35,.55); }
.source-sheet img { display: block; width: 100%; height: auto; }
.translation-flow { padding: .4rem 0; }
.translation-block { padding: 0 0 1.15rem; }
.translation-block p { margin: 0; font-size: .96rem; line-height: 1.86; }
.translation-block h2 { margin: 1.3rem 0 .5rem; font-size: 1.28rem; line-height: 1.3; letter-spacing: -.025em; }
.translation-block pre { white-space: pre-wrap; overflow-wrap: anywhere; padding: .85rem; background: var(--surface); font: .78rem/1.6 var(--mono); }
.parallel-layout { display: none; padding-top: 1rem; }
.parallel-row { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1rem,3vw,3rem); border-bottom: 1px solid var(--line); padding: 1.2rem 0; }
.language-block { min-width: 0; }
.language-tag { color: var(--accent); font: 700 .62rem/1 var(--mono); letter-spacing: .1em; }
.language-block p { margin: .55rem 0 0; font-size: .94rem; line-height: 1.8; }
.language-block h2 { margin: .55rem 0 0; font-size: 1.22rem; line-height: 1.3; letter-spacing: -.025em; }
.language-block pre { white-space: pre-wrap; overflow-wrap: anywhere; font: .76rem/1.55 var(--mono); }
.parallel-mode .source-layout { display: none; }
.parallel-mode .parallel-layout { display: block; }
.page-dialog { width: min(94vw, 1200px); max-height: 94dvh; border: 0; padding: 0; background: transparent; overflow: auto; }
.page-dialog::backdrop { background: rgba(18,25,22,.82); backdrop-filter: blur(8px); }
.page-dialog img { display: block; max-width: 100%; height: auto; margin: auto; }
.dialog-close { position: fixed; top: 1rem; right: 1rem; width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.35); border-radius: 50%; background: rgba(24,32,29,.72); color: white; font-size: 1.5rem; cursor: pointer; }
@media (max-width: 900px) {
  .intake-shell, .job-shell { grid-template-columns: 1fr; }
  .intro-block { padding-left: 0; }
  .reader-bar { grid-template-columns: 1fr auto; }
  .reader-title { display: none; }
  .reader-shell { grid-template-columns: 1fr; padding-top: 1.2rem; }
  .reader-aside { position: static; max-height: none; padding: 1rem 0 0; }
  .page-nav { display: none; }
  .source-layout { grid-template-columns: 1fr; }
  .source-sheet { position: static; }
}
@media (max-width: 640px) {
  .topbar-note { display: none; }
  .intake-shell { width: min(100% - 1rem, 1320px); padding-top: 3rem; gap: 3rem; }
  .intro-block h1 { font-size: 2.55rem; }
  .intake-panel { padding: 1.1rem; }
  .access-row { grid-template-columns: 1fr; }
  .paper-row { grid-template-columns: 34px minmax(0,1fr) 20px; min-height: 96px; }
  .paper-meta { display: none; }
  .site-footer { flex-direction: column; }
  .job-shell { padding-top: 3rem; }
  .reader-controls button { padding: .42rem .55rem; }
  .reader-controls a { display: none; }
  .parallel-row { grid-template-columns: 1fr; }
  .parallel-row .zh { padding-top: 1rem; border-top: 1px dashed var(--line); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}