@charset "UTF-8";
:root{--paper:#f7f6f0;--card:#fffefa;--sage:#edf2eb;--green:#315b4c;--deep:#243d33;--ink:#263c34;--muted:#758076;--line:#dfe5db;--soft:#e5ecdf;--amber:#916b36;--body-size:19px;--serif:"Times New Roman","Songti SC","STSong","SimSun",serif;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 var(--sans);-webkit-text-size-adjust:100%}button,input,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #a1b99e;outline-offset:3px}button{border:0;background:none}a{color:inherit;text-decoration:none}svg{width:22px;height:22px;flex-shrink:0}h1,h2,h3,p{margin:0}h1{font-weight:560;font-size:30px;letter-spacing:-.8px;line-height:1.35}h2{font-size:21px;font-weight:550}h3{font-size:18px;font-weight:550}small{font-size:12px}.shell{max-width:1060px;margin:0 auto;padding:0 40px}.site-header{height:104px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);margin-bottom:34px}.brand{display:flex;gap:13px;align-items:center;font-size:24px;letter-spacing:2px;font-weight:650}.brand small{display:block;font-size:10px;letter-spacing:1.6px;color:var(--muted);font-weight:400;margin-top:1px}.brand-icon{height:45px;width:45px;background:var(--green);color:#fff9e9;display:grid;place-items:center;border-radius:14px 14px 14px 3px;font-family:var(--serif);font-size:25px;font-weight:400;letter-spacing:0}.icon-button{display:grid;place-items:center;min-width:44px;min-height:44px;border-radius:50%;background:#eeeee5}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--green);font-weight:600;text-transform:uppercase}.muted{color:var(--muted)}.page-top{display:flex;justify-content:space-between;align-items:flex-end;margin:0 0 24px;gap:14px}.page-top p{color:var(--muted);margin-top:6px}.date-tag{font-size:12px;border:1px solid var(--line);padding:5px 11px;border-radius:30px;white-space:nowrap}.hero{position:relative;background:var(--sage);border:1px solid #dce5d6;border-radius:25px;padding:36px;overflow:hidden;min-height:267px}.hero h1{font-family:var(--serif);font-size:42px;line-height:1.45;position:relative;margin:14px 0 12px}.hero p{color:#6c7d6b;font-size:13px;position:relative;max-width:75%}.hero-art{position:absolute;right:24px;top:37px;width:150px;height:170px;opacity:.55;pointer-events:none}.hero-art svg{width:100%;height:100%}.hero .primary{margin-top:24px}.primary,.secondary{border-radius:12px;padding:12px 19px;min-height:46px;font-size:14px;display:inline-flex;align-items:center;justify-content:center;gap:16px}.primary{background:var(--green);color:#fffef7;box-shadow:0 3px 0 #213f3510}.primary:hover{background:#254b3d}.secondary{background:#eeeee5;color:var(--green)}.primary svg{width:18px}.home-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:20px}.home-aside{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:26px;display:flex;flex-direction:column;justify-content:space-between}.progress-number{font:52px/1.2 var(--serif);margin:14px 0 8px}.progress-number small{font:13px var(--sans);color:var(--muted);margin-left:8px}.meter{height:5px;background:#e9ede4;border-radius:9px;overflow:hidden;margin:13px 0}.meter span{display:block;height:100%;background:#6d8c62;border-radius:9px}.mini-stats{display:flex;gap:20px;font-size:12px;color:var(--muted)}.mini-stats strong{font-size:17px;color:var(--ink);margin-right:4px;font-weight:500}.section-title{display:flex;align-items:center;justify-content:space-between;margin:28px 0 13px}.section-title .text-button{font-size:12px;color:var(--muted)}.text-button{min-height:40px;padding:7px 2px;color:var(--green);font-size:13px}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.lesson-card{display:flex;align-items:center;gap:13px;text-align:left;border:1px solid var(--line);border-radius:17px;background:var(--card);padding:18px;min-height:94px;width:100%}.lesson-card small{display:block;color:var(--muted);margin-top:4px}.lesson-card .arrow{margin-left:auto;color:#92a08e}.tile-icon{width:43px;height:43px;display:grid;place-items:center;border-radius:13px;background:#eaf0e5;color:#59764f;flex-shrink:0}.tile-icon.gold{background:#f4edde;color:#9b8559}.tile-icon.blue{background:#e7eeed;color:#63827e}.continue-card{display:flex;gap:13px;align-items:center;padding:15px 18px;border:1px solid #d6e0d0;border-radius:15px;background:#eff2e8;margin-bottom:20px;width:100%;text-align:left}.continue-card strong{font-size:14px;font-weight:500}.continue-card small{display:block;color:var(--muted)}.continue-card .arrow{margin-left:auto}.home-footer{font-size:12px;color:var(--muted);margin:24px 0 4px;display:flex;gap:7px;align-items:center}.home-footer:before{content:"";display:block;width:5px;height:5px;border-radius:50%;background:#9bb28c}#app{padding-bottom:130px;min-height:60vh}#main-nav{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);width:460px;max-width:calc(100% - 30px);padding:8px;background:#fffef7f2;border:1px solid #dce3d5;box-shadow:0 7px 35px #29432912;border-radius:23px;display:flex;justify-content:space-around;z-index:10;backdrop-filter:blur(14px)}#main-nav a{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:10px 6px;border-radius:16px;font-size:13px;color:#81897c}#main-nav a.active{background:#e6eddf;color:var(--green);font-weight:600}#main-nav svg{width:20px;height:20px}.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px}.searchbox{display:flex;align-items:center;gap:10px;flex:1;border:1px solid var(--line);border-radius:13px;background:var(--card);padding:9px 14px}.searchbox svg{color:#909b89;width:18px}.searchbox input{width:100%;border:0;outline:0;background:none;color:var(--ink);min-width:0;font-size:15px;min-height:27px}.segmented{display:flex;gap:4px;background:#edeee6;padding:4px;border-radius:13px;margin-bottom:18px;width:fit-content}.segmented button{padding:8px 15px;min-height:41px;font-size:13px;border-radius:10px;color:var(--muted)}.segmented button.active{background:#fffef8;color:var(--green);box-shadow:0 1px 4px #23351a09}.filter-row{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:20px}.chip{border:1px solid var(--line);border-radius:24px;font-size:12px;padding:8px 13px;min-height:38px;background:transparent}.chip.active{color:var(--green);background:#e5edde;border-color:#c9d6c0}.word-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start}.word-card{border:1px solid var(--line);background:var(--card);border-radius:20px;padding:21px;scroll-margin-top:22px}.word-heading{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}.word-index{font:12px var(--sans);color:#95a18c;letter-spacing:.8px}.word-heading h2{font:600 29px/1.25 var(--serif);color:#284438}.pos{font:15px var(--serif);color:var(--muted)}.uncertain{font:11px var(--sans);color:var(--amber);border:1px solid #e2d5ba;border-radius:5px;padding:2px 5px}.definition{padding:14px 0;border-bottom:1px solid var(--line);margin-bottom:13px}.reveal{display:inline-flex;align-items:center;gap:7px;color:#73866a;font-size:12px;min-height:36px;border-radius:7px;padding:5px 8px;background:#f0f3eb}.reveal svg{height:15px;width:15px}.definition .reveal{width:100%;justify-content:center;border:1px dashed #d8e1cf;background:#f6f7f0}.meaning,.translation,.pair-zh{font:var(--body-size)/1.65 var(--serif);letter-spacing:.1px}.pair{margin:11px 0}.pair-en{font:calc(var(--body-size) + 2px)/1.45 var(--serif);color:#283c34;overflow-wrap:break-word}.pair-zh{color:#5f6c60;margin-top:3px}.pair .reveal{margin-top:4px}.word-note{font-size:12px;color:#87907f;line-height:1.65;margin-top:14px}.word-actions{display:flex;gap:8px;border-top:1px solid var(--line);padding-top:14px;margin-top:16px}.status-button{flex:1;border:1px solid var(--line);border-radius:10px;min-height:41px;color:#84907b;font-size:12px;display:flex;align-items:center;justify-content:center;gap:6px}.status-button svg{width:15px;height:15px}.status-button.selected[data-status="known"]{background:#e7eedf;border-color:#c3d2b7;color:#426139}.status-button.selected[data-status="learning"]{background:#f5eddf;border-color:#e1cfaf;color:#96723e}.result-line{font-size:12px;color:var(--muted);margin:4px 0 14px}.empty{padding:48px 20px;border:1px dashed var(--line);border-radius:18px;text-align:center;color:var(--muted)}.empty h2{color:var(--green);margin-bottom:8px}.read-layout{max-width:720px;margin:0 auto}.article-head{padding:22px 0;margin-bottom:15px;border-bottom:1px solid var(--line)}.article-head .article-letter{font:13px var(--sans);letter-spacing:2px;color:var(--muted)}.article-head h2{font:32px/1.2 var(--serif);margin:12px 0 8px;color:var(--deep)}.article-head p{font-size:13px;color:var(--muted)}.passage-card{background:var(--card);padding:24px;border:1px solid var(--line);border-radius:18px;margin:15px 0 22px;scroll-margin-top:20px}.para-number{font-size:10px;letter-spacing:2px;color:#8a987d;margin-bottom:10px}.english{font:calc(var(--body-size) + 2px)/1.65 var(--serif);color:#293b33}.english b,.english strong{font-weight:700;color:#294e3b}.translation-toggle{margin-top:18px;width:100%;padding:10px;background:#eef2e9;border-radius:10px;display:flex;align-items:center;justify-content:space-between;min-height:43px;color:#5e7651;font-size:12px}.translation-toggle svg{width:16px;height:16px}.translation{margin-top:13px;padding:16px;background:#eff3eb;border-left:2px solid #b7c7aa;border-radius:0 10px 10px 0;color:#52644d}.translation p{margin:0}.context-note{font-size:12px;color:var(--muted);line-height:1.7;margin-top:13px}.syntax-card{padding:23px;background:var(--card);border:1px solid var(--line);border-radius:18px;margin-bottom:18px;scroll-margin-top:20px}.syntax-title{display:flex;align-items:center;gap:10px;margin-bottom:18px}.syntax-title span{font:13px var(--serif);color:var(--green);border:1px solid #cfdcc7;padding:4px 8px;border-radius:6px}.syntax-card .marked{background:#eef3f3;padding:15px;border-radius:12px;margin-bottom:19px}.syntax-card h3{font-size:14px;color:var(--green);margin:19px 0 9px}.syntax-notes{margin:0;padding-left:23px;color:#596b55;font:var(--body-size)/1.7 var(--serif)}.syntax-notes li{margin-bottom:8px}.compare-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:23px;margin:14px 0}.compare-card h2{font:24px/1.35 var(--serif);padding-bottom:15px;border-bottom:1px solid var(--line)}.compare-card ul{padding:0;margin:0;list-style:none}.compare-card li{padding:14px 0;font:var(--body-size)/1.7 var(--serif);border-bottom:1px solid #edf0e8}.compare-card li:last-child{border:0;padding-bottom:0}.setting-card{border:1px solid var(--line);background:var(--card);border-radius:19px;padding:22px;margin-bottom:16px}.setting-card p{color:var(--muted);font-size:13px;margin-top:9px}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.setting-row h3{font-size:16px}.size-controls{display:flex;gap:5px}.size-controls button{width:43px;height:43px;border:1px solid var(--line);border-radius:10px;font-family:var(--serif)}.size-controls button.active{background:#e7eedf;border-color:#b8caab}.button-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}.history-card{width:100%;display:flex;text-align:left;align-items:center;gap:17px;border:1px solid var(--line);background:var(--card);padding:22px;border-radius:18px;margin:12px 0}.calendar-date{background:#eaf0e2;border-radius:12px;padding:8px 14px;text-align:center;color:#547247}.calendar-date strong{font:28px var(--serif);display:block}.calendar-date small{font-size:10px}.history-card .arrow{margin-left:auto}.history-card p{font-size:12px;color:var(--muted)}.day-switch{font-size:12px;color:var(--green);padding:8px 12px;border:1px solid var(--line);border-radius:20px;min-height:40px}#toast{position:fixed;bottom:116px;left:50%;transform:translateX(-50%);width:max-content;max-width:90vw;padding:12px 18px;background:#2b463def;color:#fffdf4;border-radius:13px;z-index:40;font-size:13px;box-shadow:0 5px 25px #23351a20}#storage-warning{padding:12px;border:1px solid #e0c59e;background:#f9efde;border-radius:12px;color:#825f30;margin:0 0 18px;font-size:13px}dialog{border:1px solid var(--line);border-radius:22px;background:var(--paper);padding:27px;max-width:440px;width:calc(100% - 32px);color:var(--ink)}dialog::backdrop{background:#223c345c;backdrop-filter:blur(3px)}dialog h2{margin:12px 0}dialog p{font-size:14px;margin-bottom:12px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}[hidden]{display:none!important}.text-reading{font-family:var(--serif)}
@media(min-width:900px){.site-header{padding-right:0}.read-layout .page-top{margin-top:8px}.word-grid{gap:18px}.word-card{padding:25px}.settings-grid>.setting-card{margin:0}#main-nav{bottom:24px}}
@media(max-width:650px){.shell{padding:0 20px}.site-header{height:86px;margin-bottom:26px}.brand{font-size:22px;gap:11px}.brand-icon{height:41px;width:41px;font-size:23px}.brand small{font-size:9px;letter-spacing:1.3px}.icon-button{width:41px;height:41px;min-width:41px;min-height:41px}h1{font-size:28px}.page-top{margin-bottom:21px}.page-top p{font-size:12px}.hero{padding:25px 23px;border-radius:22px;min-height:265px}.hero h1{font-size:35px;margin:15px 0 10px}.hero p{font-size:12px;max-width:75%}.hero-art{width:110px;height:142px;right:5px;top:48px;opacity:.4}.hero .primary{margin-top:21px}.home-grid{display:block}.home-aside{margin-top:13px;border-radius:17px;padding:17px 19px;display:grid;grid-template-columns:auto 1fr;align-items:center;gap:6px 24px}.home-aside>.eyebrow{grid-column:1/-1}.progress-number{font-size:33px;margin:1px 0}.progress-number small{font-size:11px;margin-left:5px}.progress-area{min-width:0}.meter{margin:6px 0 8px}.mini-stats{gap:12px;font-size:10px}.mini-stats strong{font-size:14px}.lesson-grid{grid-template-columns:1fr;gap:9px}.lesson-card{min-height:80px;padding:14px 16px;border-radius:15px}.lesson-card strong{font-size:15px;font-weight:550}.lesson-card small{font-size:11px;margin-top:2px}.tile-icon{height:42px;width:42px}.section-title{margin:24px 0 10px}.section-title h2{font-size:18px}.home-footer{font-size:11px;margin-top:18px}#main-nav{bottom:max(10px,env(safe-area-inset-bottom));max-width:calc(100% - 28px);padding:6px;border-radius:22px}#main-nav a{flex-direction:column;gap:4px;padding:7px 3px;font-size:10px;line-height:1.2;border-radius:16px;min-height:52px}#main-nav svg{height:21px;width:21px}#app{padding-bottom:118px}.word-grid{grid-template-columns:1fr;gap:13px}.word-card{padding:20px;border-radius:17px}.word-heading h2{font-size:29px}.filter-row{gap:6px}.chip{padding:7px 11px}.passage-card,.syntax-card,.compare-card{padding:21px 19px;border-radius:16px}.passage-card{margin-bottom:16px}.article-head{padding:14px 0}.article-head h2{font-size:30px}.article-head p{font-size:12px}.translation{padding:14px}.settings-grid{display:block}.setting-card{padding:20px}.day-switch{padding:7px 10px}.toolbar{gap:8px}.segmented{width:100%}.segmented button{flex:1;padding:8px 9px}.compare-card h2{font-size:23px}.syntax-title h2{font-size:18px}.date-tag{padding:4px 9px;font-size:11px}.context-note{font-size:11px}#toast{bottom:102px}.home-aside .eyebrow{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.shell{padding-top:env(safe-area-inset-top,0px)}
@media(max-width:650px){.searchbox input{font-size:16px}}

/* Chinese uses screen-oriented system fonts; English reading retains Times. */
:root {
  --sans: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Times New Roman", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
}
body { font-weight:400; -webkit-font-smoothing:antialiased; }
h1 { font-weight:500; letter-spacing:.2px; }
h2, h3 { font-weight:500; }
.brand { font-weight:600; letter-spacing:1px; }
.brand-icon { font-family:var(--sans); font-weight:400; }
.brand small { letter-spacing:1px; }
.hero h1 { font-family:var(--sans); font-weight:500; font-size:39px; line-height:1.5; letter-spacing:1px; }
.meaning, .translation, .pair-zh {
  font-family:var(--sans);
  font-weight:400;
  line-height:1.8;
  letter-spacing:.25px;
}
.translation { color:#485e50; }
.syntax-notes, .compare-card li { line-height:1.8; letter-spacing:.15px; }
.lesson-card strong { font-weight:500; }
.page-top p, .setting-card p, .context-note { line-height:1.8; }
@media(max-width:650px) {
  .hero h1 { font-size:32px; }
  .lesson-card strong { font-weight:500; }
}