:root { --ink:#17243b; --muted:#68758a; --paper:#f4f0e8; --card:#fffdf8; --blue:#173f70; --line:#dcd6c9; --bad:#9d3027; --shadow:0 18px 45px #1a2c4014; }
* { box-sizing:border-box; }
body { margin:0; background:var(--paper); color:var(--ink); font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC",sans-serif; }
.hero { padding:28px max(5vw,24px) 42px; background:linear-gradient(125deg,#0d294d,#1d5785); color:white; }
.home { color:#dcecff; text-decoration:none; font-weight:650; }
.eyebrow { margin:52px 0 12px; color:#f0c96e; letter-spacing:.13em; text-transform:uppercase; font-size:.78rem; }
.hero h1 { margin:0; font-family:Georgia,"Noto Serif SC",serif; font-size:clamp(2.5rem,7vw,5.7rem); line-height:.94; font-weight:500; }
.hero h1 span { font-size:.6em; color:#f6deb0; }
.lede { line-height:1.7; color:#dce7f2; }
.stats { display:flex; gap:10px; flex-wrap:wrap; margin-top:24px; }
.stat { padding:8px 13px; border:1px solid #ffffff38; border-radius:999px; background:#ffffff12; font-size:.88rem; }
main { max-width:1500px; margin:auto; padding:28px max(3vw,18px) 70px; }
.controls { display:grid; grid-template-columns:minmax(220px,2fr) minmax(170px,1fr); gap:14px; margin-bottom:20px; }
.controls label { font-size:.78rem; font-weight:700; color:var(--muted); letter-spacing:.04em; }
.controls input,.controls select { display:block; width:100%; margin-top:6px; padding:12px 14px; border:1px solid var(--line); border-radius:10px; background:var(--card); color:var(--ink); font:inherit; }
.layout { display:grid; grid-template-columns:minmax(260px,360px) 1fr; gap:22px; align-items:start; }
.episodes { max-height:75vh; overflow:auto; background:var(--card); border:1px solid var(--line); border-radius:14px; padding:8px; position:sticky; top:12px; }
.episode { display:block; width:100%; padding:13px; text-align:left; border:0; border-bottom:1px solid #e9e4da; background:transparent; color:var(--ink); cursor:pointer; border-radius:8px; }
.episode:hover,.episode.active { background:#e8f0f7; }
.episode.unavailable { color:var(--muted); cursor:default; }
.episode strong { display:block; line-height:1.35; }
.episode small { display:block; margin-top:6px; color:var(--muted); }
.reader { min-height:55vh; }
.empty { padding:70px 20px; text-align:center; color:var(--muted); background:var(--card); border:1px solid var(--line); border-radius:14px; }
.empty span { font-size:3rem; }
.reader-head { padding:28px; background:var(--card); border:1px solid var(--line); border-radius:14px; box-shadow:var(--shadow); }
.reader-head h2 { margin:0 0 12px; font-family:Georgia,"Noto Serif SC",serif; font-size:clamp(1.55rem,3vw,2.5rem); }
.reader-head a { color:var(--blue); }
.reader-meta { display:flex; gap:12px 22px; align-items:center; flex-wrap:wrap; }
.reader-meta span { color:var(--muted); font-size:.86rem; }
.transcript-head { display:flex; justify-content:space-between; align-items:baseline; gap:16px; margin-top:20px; padding:13px 18px; border-radius:12px 12px 0 0; background:var(--blue); color:white; font-weight:750; }
.transcript-head small { color:#dcecff; font-weight:500; }
.turns { overflow:hidden; border:1px solid var(--line); border-top:0; border-radius:0 0 12px 12px; background:var(--card); }
.turn { display:grid; grid-template-columns:82px minmax(0,1fr); gap:20px; padding:24px 26px; border-top:1px solid var(--line); }
.turn:first-child { border-top:0; }
.turn:nth-child(even) { background:#fbf8f1; }
.speaker { padding-top:2px; color:var(--muted); text-align:center; }
.speaker span { display:grid; place-items:center; width:34px; height:34px; margin:0 auto 7px; border-radius:50%; background:#dce9f5; color:#174c7b; font-weight:800; }
.speaker small { font-size:.7rem; text-transform:uppercase; letter-spacing:.05em; }
.speaker-2 .speaker span { background:#f4e5c2; color:#735313; }
.turn-copy { max-width:850px; }
.turn-copy p { margin:0; overflow-wrap:anywhere; }
.turn-en { color:#3d4b5e; font-family:Georgia,"Times New Roman",serif; font-size:1.02rem; line-height:1.72; }
.turn-zh { margin-top:12px!important; padding-top:12px; border-top:1px dashed #d8d1c4; font-size:1.06rem; line-height:1.82; letter-spacing:.012em; }
.columns-label,.pair { display:grid; grid-template-columns:1fr 1fr; gap:0; }
.columns-label { position:sticky; top:0; z-index:2; margin-top:20px; background:var(--blue); color:white; border-radius:12px 12px 0 0; }
.columns-label span { padding:12px 18px; font-weight:700; }
.pair { background:var(--card); border:1px solid var(--line); border-top:0; }
.pair:last-child { border-radius:0 0 12px 12px; }
.pair>div { padding:20px; white-space:pre-wrap; line-height:1.72; overflow-wrap:anywhere; }
.pair .zh { border-left:1px solid var(--line); background:#fffaf0; }
.failure { padding:24px; border-left:5px solid var(--bad); background:#fff5f3; border-radius:8px; }
footer { text-align:center; padding:28px; color:var(--muted); font-size:.8rem; line-height:1.6; }
@media(max-width:760px) {
  .controls,.layout { grid-template-columns:1fr; }
  .episodes { position:relative; max-height:330px; }
  .columns-label { display:none; }
  .pair { grid-template-columns:1fr; margin-top:14px; border-top:1px solid var(--line); border-radius:12px!important; }
  .pair .zh { border-left:0; border-top:1px dashed var(--line); }
  .pair>div:before { display:block; margin-bottom:8px; color:var(--muted); font-size:.72rem; font-weight:800; letter-spacing:.08em; }
  .pair .en:before { content:"ENGLISH"; }
  .pair .zh:before { content:"简体中文"; }
  .transcript-head { align-items:flex-start; flex-direction:column; gap:2px; }
  .turn { grid-template-columns:42px minmax(0,1fr); gap:12px; padding:19px 15px; }
  .speaker small { display:none; }
  .speaker span { width:30px; height:30px; }
  .turn-en { font-size:.98rem; }
  .turn-zh { font-size:1.03rem; }
}
@media(prefers-color-scheme:dark) {
  :root { --ink:#e9eef5; --muted:#a9b2bf; --paper:#101722; --card:#182231; --line:#344153; --blue:#4d8ac7; --shadow:none; }
  .pair .zh { background:#1d2937; }
  .turn:nth-child(even) { background:#1b2735; }
  .turn-en { color:#cbd5e1; }
  .episode:hover,.episode.active { background:#25374a; }
  .failure { background:#3a2223; }
}