:root{--paper:#fffdf8;--ink:#26323a;--muted:#7b8790;--line:#e7e5df;--sky:#eaf5ff;--mint:#eaf8f2;--peach:#fff0e8;--lav:#f3efff;--gold:#fff6cf;--shadow:0 12px 36px rgba(42,56,66,.10);--text-size:21px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,#fffdf8 0%,#fbfcfd 100%);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
button,input,textarea{font:inherit}button{cursor:pointer}.topbar{position:fixed;top:0;left:0;right:0;height:62px;z-index:50;display:flex;align-items:center;gap:14px;padding:0 18px;background:rgba(255,253,248,.91);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:baseline;gap:10px;min-width:220px}.brand b{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;font-size:20px}.brand span{font-size:12px;color:var(--muted)}.top-actions{margin-left:auto;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.pill,.icon-btn{border:1px solid var(--line);background:white;border-radius:999px;padding:7px 11px;color:#43505a;font-size:13px}.pill:hover,.icon-btn:hover{border-color:#b9ccd9;background:var(--sky)}.pill.active{background:var(--sky);border-color:#a9cfe7;color:#315f7b}
.progress{position:absolute;left:0;bottom:-1px;height:2px;background:#87b7d6;width:0}.sidebar{position:fixed;left:0;top:62px;bottom:0;width:270px;overflow:auto;border-right:1px solid var(--line);padding:18px 14px 36px;background:rgba(255,255,255,.70)}
.nav-title{font-size:12px;letter-spacing:.12em;color:var(--muted);margin:4px 8px 14px}.nav-block{margin-bottom:14px}.nav-seg{display:block;text-decoration:none;color:#31414c;font-weight:700;padding:8px;border-radius:10px}.nav-seg:hover{background:var(--mint)}
.nav-sub{display:flex;gap:9px;text-decoration:none;color:#6d7880;font-size:12px;padding:5px 8px 5px 14px;border-radius:8px;line-height:1.4}.nav-sub span{font-variant-numeric:tabular-nums;color:#9ba4aa}.nav-sub:hover{background:#f6f8f9;color:#2f5266}
.main{margin-left:270px;min-height:100vh}.reader{max-width:900px;margin:0 auto;padding:100px 54px 120px}.hero{background:linear-gradient(135deg,var(--sky),#f7fbff 58%,var(--peach));border:1px solid #dfeaf1;border-radius:26px;padding:34px 36px;margin-bottom:30px}
.hero .eyebrow{font-size:12px;letter-spacing:.16em;color:#6a8495;margin-bottom:9px}.hero h1{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;font-size:38px;margin:0 0 12px}.hero p{margin:7px 0;color:#586772;line-height:1.8}
.source-note{margin-top:18px;padding:14px 16px;background:rgba(255,255,255,.68);border-radius:14px;border:1px solid rgba(126,182,220,.25);font-size:13px;line-height:1.7}.quickrow{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.quickrow button{border:0;border-radius:12px;background:white;padding:9px 12px;color:#3f596a;box-shadow:0 3px 12px rgba(60,80,90,.06)}
.segment-head{scroll-margin-top:82px;padding:36px 4px 12px;margin-top:18px}.segment-kicker{color:#7da3b8;font-size:12px;letter-spacing:.16em}.segment-head h2{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;margin:7px 0 10px;font-size:27px}.segment-head p{margin:0;background:var(--mint);padding:13px 15px;border-radius:14px;line-height:1.7;color:#4e6c60;font-size:14px}
.passage{scroll-margin-top:82px;background:rgba(255,255,255,.84);border:1px solid var(--line);border-radius:22px;padding:22px 24px 18px;margin:18px 0;box-shadow:0 4px 18px rgba(60,70,75,.035)}.passage:target{outline:3px solid rgba(126,182,220,.20)}
.passage-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.passage-no{font-size:12px;color:#9aa3a9}.passage-actions{display:flex;gap:6px}.original-text{font-family:"Songti SC","STSong","Noto Serif CJK SC","SimSun",serif;font-size:var(--text-size);line-height:2.05;letter-spacing:.02em;margin:10px 0 14px}
.mark{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;font-size:.55em;color:#94a0a8;margin:0 1px;vertical-align:super}.crit{font-size:.72em;color:#a4a0a0}.editorial{background:#f4f0ff;color:#6d5c96;border-radius:4px;padding:0 2px}
.term{border-bottom:1.5px dotted #7eacc5;background:linear-gradient(transparent 72%,rgba(126,182,220,.13) 72%);cursor:pointer;border-radius:2px}.term:hover,.term:focus{background:var(--sky);outline:none}.hz{border-radius:3px;cursor:pointer}.hz:hover,.hz:focus{background:var(--gold);outline:none}
.ann-wrap{border-top:1px dashed #e4e5e4;padding-top:10px}.ann-detail{margin:7px 0;border-radius:12px;overflow:hidden}.ann-detail summary{display:flex;justify-content:space-between;align-items:center;list-style:none;padding:8px 11px;cursor:pointer;font-size:13px}.ann-detail summary::-webkit-details-marker{display:none}.ann-detail summary small{font-size:11px;color:#8c969c}
.ann-detail.note summary{background:var(--sky)}.ann-detail.shu summary{background:var(--mint)}.ann-detail.shiwen summary{background:var(--peach)}.ann-detail.collation summary{background:var(--lav)}.ann-detail.other summary{background:#f5f5f3}.ann-body{padding:10px 13px 4px;border:1px solid #efefec;border-top:0;border-radius:0 0 12px 12px}.ann-body p{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;font-size:15px;line-height:1.85;color:#59636a;margin:0 0 10px}
.clean-mode .ann-wrap,.clean-mode .passage-actions,.clean-mode .segment-head p{display:none}.clean-mode .term{border-bottom:0;background:none}.clean-mode .hz{cursor:text}.pdf-modal{position:fixed;inset:0;z-index:100;background:rgba(35,45,52,.42);display:none;padding:4vh 4vw}.pdf-modal.show{display:block}.pdf-card{height:92vh;background:white;border-radius:20px;overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow)}
.pdf-head{display:flex;align-items:center;gap:10px;padding:10px 12px;border-bottom:1px solid var(--line)}.pdf-head input[type=number]{width:82px;border:1px solid #ddd;border-radius:9px;padding:6px 8px}.pdf-frame{flex:1;border:0;width:100%;background:#f3f3f3}.empty-pdf{flex:1;display:grid;place-items:center;color:#7c878d;text-align:center;padding:30px}.mobile-menu{display:none}
@media(max-width:900px){.sidebar{transform:translateX(-100%);transition:.2s;z-index:80;background:white}.sidebar.show{transform:translateX(0)}.main{margin-left:0}.reader{padding:90px 20px 100px}.mobile-menu{display:inline-flex}.brand{min-width:auto}.brand span{display:none}.top-actions .desktop-only{display:none}}
@media(max-width:560px){.hero{padding:24px 20px;border-radius:20px}.hero h1{font-size:31px}.passage{padding:18px 17px}.original-text{line-height:1.95}.topbar{padding:0 10px}}

/* Contextual sentence annotations */
.ann-wrap{display:none!important}
.source-unit{border-radius:7px;padding:2px 1px;margin:0 -1px;transition:background .12s ease,box-shadow .12s ease;cursor:pointer}
.source-unit.has-comment:hover,.source-unit.has-comment:focus,.source-unit.active-comment{background:var(--gold);box-shadow:0 0 0 3px var(--gold);outline:none}
.clean-mode .source-unit{background:transparent!important;box-shadow:none!important;cursor:text}
.original-text>.mark{display:none!important}
.ctx-inline-wrap{display:block;width:100%;margin:12px 0 18px;clear:both}
.ctx-inline{display:block;width:100%;padding:14px 16px;border:1px solid #e5e7e5;border-radius:15px;background:#fff;box-shadow:0 7px 22px rgba(42,56,66,.07);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
.ctx-inline-source{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;font-size:14px;line-height:1.7;color:#7a858c;margin-bottom:10px;padding-bottom:9px;border-bottom:1px solid #eef0ef}
.ctx-block{margin:8px 0 10px;padding:10px 12px;border-radius:12px}.ctx-block.note{background:#f7fbff}.ctx-block.shu{background:#f8fcfa}.ctx-block.shiwen{background:#fff9f5}
.ctx-label{display:inline-flex;min-width:25px;height:22px;align-items:center;justify-content:center;padding:0 7px;border-radius:7px;font-weight:700;font-size:12px;margin-right:8px;vertical-align:1px}.ctx-label.note{background:var(--sky);color:#397795}.ctx-label.shu{background:var(--mint);color:#4d826d}.ctx-label.shiwen{background:var(--peach);color:#a7684b}
.ctx-text{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;font-size:15px;line-height:1.85;color:#4c5960}.ctx-text+.ctx-text{margin-top:7px;padding-top:7px;border-top:1px dashed rgba(120,130,135,.16)}
.reading-card{margin-top:12px;padding:12px;border-radius:12px;background:#fffaf0;border:1px solid #f1e2c2}.reading-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}.reading-term{font-family:"Songti SC","STSong",serif;font-size:22px}.reading-pinyin{font-weight:700;color:#4e87a7}.reading-source{font-size:12px;color:#996c55}.reading-gloss{margin-top:7px;font-family:"Songti SC","STSong",serif;font-size:14px;line-height:1.7;color:#59636a}.reading-speak{margin-left:auto}
.ctx-empty{padding:10px;color:#98a0a5;font-size:13px}
.clean-mode .ctx-inline-wrap{display:none!important}
@media(max-width:900px){.ctx-inline{padding:12px}.ctx-block{padding:9px 10px}.ctx-text{font-size:14px}.reading-speak{margin-left:0}}

/* Keep contextual notes visually connected while pointer hover is active. */
.source-unit.has-comment,
.ctx-inline-wrap{transition:background .12s ease,box-shadow .12s ease,opacity .12s ease}
.ctx-inline-wrap:hover .ctx-inline{border-color:#d8e3df;box-shadow:0 9px 26px rgba(42,56,66,.10)}

/* Independent character/word pronunciation panel */
.main{transition:margin-right .2s ease}.reading-open .main{margin-right:320px}
.term-char{border-radius:3px}.term-char:hover,.term-char:focus{background:var(--gold);outline:none;box-shadow:0 0 0 2px var(--gold)}
.reading-selected{background:var(--gold)!important;box-shadow:0 0 0 2px #ead28c;outline:none}
.reading-panel{position:fixed;z-index:40;top:62px;right:0;bottom:0;width:320px;padding:30px 26px;background:rgba(255,253,248,.98);border-left:1px solid var(--line);box-shadow:-10px 0 30px rgba(42,56,66,.07);overflow:auto;transform:translateX(105%);visibility:hidden;transition:transform .2s ease,visibility 0s linear .2s}
.reading-panel.show{transform:translateX(0);visibility:visible;transition:transform .2s ease}
.reading-panel-close{position:absolute;top:14px;right:16px;width:32px;height:32px;border:0;border-radius:50%;background:transparent;color:#7b8790;font-size:24px;line-height:1}.reading-panel-close:hover,.reading-panel-close:focus{background:var(--sky);outline:none}
.reading-panel-kicker{font-size:12px;letter-spacing:.16em;color:#8b969d;margin-bottom:14px}.reading-panel-term{font-family:"Songti SC","STSong",serif;font-size:38px;font-weight:600;margin:0 0 24px}
.reading-panel-details{margin:0}.reading-panel-details dt{font-size:12px;color:#8b969d;margin-top:18px}.reading-panel-details dd{margin:6px 0 0}.reading-panel-pinyin{font-size:22px;font-weight:700;color:#4e87a7}.reading-panel-source{font-family:"Songti SC","STSong",serif;font-size:17px;color:#795b4c}
.reading-panel-gloss{font-family:"Songti SC","STSong",serif;font-size:16px;line-height:1.8;color:#515e65;margin:9px 0 24px;padding:13px 14px;background:var(--peach);border-radius:12px}.reading-panel-speak{width:100%;padding:10px}
@media(max-width:900px){.reading-open .main{margin-right:300px}.reading-panel{width:300px}}
@media(max-width:640px){.reading-open .main{margin-right:0;padding-bottom:360px}.reading-panel{top:auto;width:100%;height:340px;border-left:0;border-top:1px solid var(--line);transform:translateY(105%)}.reading-panel.show{transform:translateY(0)}}