@import url("../subject-theme.css?v=1");
:root{font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;color:#162743;background:#f6f8fd;--subject-accent:var(--chinese-accent);--subject-tint:var(--chinese-tint);--subject-hover:#96480f;--subject-line:#efd1b9;--subject-focus:#d58a50;--subject-wave:#e8b88d;--subject-ink:#874313;--muted:#65748c;--line:#dfe6f1;font-synthesis:none}*{box-sizing:border-box}body{margin:0;border-top:5px solid var(--subject-accent)}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.48}a{color:var(--subject-accent);text-decoration:none}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--subject-focus);outline-offset:4px}header,main,footer{width:min(1160px,calc(100% - 64px));margin:auto}.masthead{height:94px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;color:#162743;font-size:23px;font-weight:750;letter-spacing:-.6px}.light{font-weight:400}.mark{background:var(--subject-accent);border-radius:12px;color:white;font:700 30px Georgia,serif;width:42px;height:44px;display:grid;place-content:center;position:relative;margin-right:12px}.mark span{position:absolute;right:6px;bottom:2px;color:#dcf58b}.back{font-size:14px;color:var(--muted)}.intro{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin:38px 0 28px}.eyebrow{font-size:13px;letter-spacing:2px;color:var(--subject-accent);font-weight:700;margin:0 0 9px}h1{font-size:38px;letter-spacing:-1px;margin:0 0 12px}h1 span{color:var(--subject-accent)}.intro p:not(.eyebrow){color:var(--muted);font-size:16px;line-height:1.8;margin:0}.bookbadge{border:1px solid var(--line);background:white;border-radius:12px;padding:15px 20px;white-space:nowrap;font-size:14px;line-height:1.8}.bookbadge strong{display:block;font-size:16px}.workspace{display:grid;grid-template-columns:200px 1fr;gap:30px;align-items:start}.unitnav{position:sticky;top:20px}.navlabel{font-size:13px;color:var(--muted);letter-spacing:1px;margin:0 0 12px}.unitnav button{display:flex;align-items:center;gap:12px;width:100%;padding:14px 12px;border:0;background:transparent;color:var(--muted);border-radius:10px;text-align:left;margin-bottom:4px;font-size:15px}.unitnav button.active{background:var(--subject-tint);color:var(--subject-accent);font-weight:700}.unitnav button:hover{background:var(--subject-tint)}.unitnav .navnum{font-size:13px;font-variant-numeric:tabular-nums}.unitnav button.active .navnum{background:var(--subject-accent);color:white}.navnum{width:26px;height:26px;border:1px solid var(--line);border-radius:7px;display:grid;place-items:center;background:white}.unitheading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 18px}.unitheading h2{margin:0;font-size:21px}.unitheading span{font-size:14px;color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.lesson{background:white;border:1px solid var(--line);border-radius:18px;padding:23px;display:flex;flex-direction:column;min-width:0;box-shadow:0 4px 15px #172b5003}.lessonmeta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px}.lessonmeta .number{font-size:13px;color:var(--subject-accent);font-weight:650;background:var(--subject-tint);padding:5px 8px;border-radius:6px}.lesson h3{font-size:22px;line-height:1.4;margin:18px 0 10px;letter-spacing:-.5px}.lesson p{font-size:14px;color:var(--muted);line-height:1.8;margin:0 0 22px}.cardactions{display:flex;gap:10px;margin-top:auto}.btn{border:1px solid var(--line);border-radius:10px;background:white;color:#203657;padding:12px 18px;font-size:15px;font-weight:600;line-height:1.4}.btn.primary{background:var(--subject-accent);border-color:var(--subject-accent);color:white}.btn:hover{filter:brightness(.97)}.cardactions .btn{flex:1;padding:11px 9px}.previewtoggle{font-size:14px;color:var(--muted);background:none;border:0;padding:18px 0 0;align-self:flex-start}.wordpreview{display:flex;flex-wrap:wrap;gap:8px;border-top:1px solid var(--line);padding-top:16px;margin-top:16px}.wordpreview span{background:var(--subject-tint);padding:5px 9px;border-radius:6px;font-size:15px}.emptylesson{background:#f0f3f9;box-shadow:none;min-height:145px}.emptylesson h3{font-size:19px}.emptylesson p{margin:0}.guide{display:flex;gap:16px;padding:20px 23px;border-radius:15px;background:var(--subject-tint);margin:24px 0 0;color:#415579;font-size:14px;line-height:1.8}.guide strong{color:var(--subject-ink);white-space:nowrap}.source{margin-top:30px;color:var(--muted);font-size:14px;line-height:1.9}.source summary{cursor:pointer}.source a{margin-right:16px}.session{max-width:780px;margin:34px auto}.sessionhead{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:22px}.sessionhead h1{font-size:25px;margin:7px 0 0}.sessionhead .eyebrow{font-size:12px}.sessionhead .btn{flex-shrink:0}.practice{background:white;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:0 12px 40px #16336709}.progressrow{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:24px 28px 18px;font-size:14px;color:var(--muted)}.progressrow strong{color:var(--subject-accent);font-size:17px}progress{display:block;width:100%;height:4px;border:0;border-radius:0;background:var(--subject-tint)}progress::-webkit-progress-bar{background:var(--subject-tint)}progress::-webkit-progress-value{background:var(--subject-accent)}progress::-moz-progress-bar{background:var(--subject-accent)}.practicebody{text-align:center;padding:38px 30px 32px}.wave{height:78px;display:flex;justify-content:center;align-items:center;gap:7px;margin:12px 0 24px}.wave i{width:7px;height:24px;border-radius:8px;background:var(--subject-wave)}.wave i:nth-child(2n){height:46px;background:var(--subject-focus)}.wave i:nth-child(3n){height:65px;background:var(--subject-accent)}.playing .wave i{animation:pulse .8s ease-in-out infinite alternate}.playing .wave i:nth-child(2n){animation-delay:.2s}.playing .wave i:nth-child(3n){animation-delay:.4s}@keyframes pulse{to{transform:scaleY(.45)}}.practicebody h2{font-size:25px;margin:0 0 12px}.practicebody p{font-size:15px;color:var(--muted);line-height:1.9;margin:0}.hiddenbadge{display:inline-flex;align-items:center;gap:7px;color:#65748c;background:#f1f4fa;border-radius:30px;font-size:13px;padding:8px 13px;margin-top:22px}.practiceactions{display:flex;justify-content:center;gap:12px;padding:0 28px 30px}.practiceactions .btn{min-width:160px;font-size:17px;padding:14px 22px}.practicefoot{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:18px 28px;border-top:1px solid var(--line);background:#fafbfe;color:var(--muted);font-size:14px}.practicefoot select{background:white;border:1px solid var(--line);padding:7px;border-radius:7px;color:#203657;margin-left:8px}.keyhint{font-size:13px;color:var(--muted);text-align:center;margin:20px}.statuserror{color:#b32837!important}.resultintro{background:var(--subject-accent);color:white;border-radius:22px;padding:30px;margin:22px 0}.resultintro h1{font-size:30px}.resultintro p{color:var(--subject-tint);line-height:1.8}.resultlist{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:0;list-style:none;counter-reset:word}.resultlist li{background:white;border:1px solid var(--line);border-radius:13px;padding:18px;position:relative}.resultlist .idx{font-size:12px;color:#76869c;display:block;margin-bottom:10px}.resultlist .pinyin{font-size:14px;color:#63728b;line-height:1.6;display:block;margin-bottom:5px}.resultlist strong{font-size:22px;font-weight:550}.resultlist button{border:0;background:var(--subject-tint);border-radius:6px;color:var(--subject-accent);padding:6px 9px;position:absolute;top:12px;right:12px;font-size:13px}.resultactions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.loading{padding:80px 0;text-align:center;color:var(--muted)}footer{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);margin-top:50px;padding:22px 0 28px;color:var(--muted);font-size:13px}@media(max-width:850px){.workspace{grid-template-columns:1fr;gap:20px}.unitnav{position:static;display:flex;overflow-x:auto;gap:7px;padding-bottom:5px}.unitnav .navlabel{display:none}.unitnav button{width:auto;flex-shrink:0;margin:0;padding:10px;gap:7px}.unitnav button .navtitle{display:none}.intro{align-items:flex-start}.bookbadge{padding:12px}.guide{display:block}.guide strong{display:block;margin-bottom:5px}}@media(max-width:560px){header,main,footer{width:calc(100% - 32px)}.masthead{height:80px}.brand{font-size:20px}.mark{width:35px;height:38px;font-size:27px;margin-right:8px}.back{font-size:13px}.intro{margin:28px 0 22px;display:block}h1{font-size:32px}.bookbadge{display:inline-block;margin-top:16px;padding:8px 12px}.bookbadge strong{display:inline;margin-right:10px;font-size:14px}.cards{grid-template-columns:1fr}.lesson{padding:22px}.emptylesson{min-height:0}.lesson h3{margin-top:14px}.unitheading{align-items:flex-start}.unitheading span{font-size:13px}.unitheading h2{font-size:19px}.sessionhead{align-items:flex-start}.sessionhead h1{font-size:21px}.sessionhead .btn{font-size:13px;padding:9px 12px}.practicebody{padding:24px 18px}.practiceactions{padding:0 18px 25px;gap:10px}.practiceactions .btn{min-width:0;flex:1;padding:14px 10px;font-size:16px}.practicefoot{padding:16px 18px;flex-wrap:wrap;font-size:13px}.progressrow{padding:20px 18px 16px}.resultlist{grid-template-columns:repeat(2,minmax(0,1fr))}.resultlist li{padding:15px}.resultlist strong{font-size:20px}.keyhint{display:none}.resultintro{padding:24px}.resultintro h1{font-size:26px}footer{font-size:12px}}@media(prefers-reduced-motion:reduce){*{animation:none!important}}@media print{body:has(.practice) main{visibility:hidden}.unitnav,.back,.resultactions,.resultlist button{display:none}}.wordselect{margin:0 0 5px;padding:15px 14px 12px;border:1px solid #e3e9f4;border-radius:12px;min-width:0}.wordselect legend{padding:0 5px;font-size:13px;color:#546682}.wordselect legend strong{color:var(--subject-accent)}.selectiontools{display:flex;justify-content:space-between;align-items:center;gap:10px;color:#7888a0;font-size:12px;line-height:1.5;margin:0 0 9px}.selectionbuttons{display:flex;gap:2px;flex-shrink:0}.selectiontool{border:0;background:transparent;color:var(--subject-accent);font-size:13px;padding:5px 6px;border-radius:6px}.selectiontool:hover{background:var(--subject-tint)}.selectiontool+.selectiontool{color:#74829a}.wordchoices{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.wordchoice{appearance:none;display:flex;align-items:center;justify-content:center;min-width:0;min-height:40px;padding:8px 10px;border:1px solid var(--subject-line);border-radius:10px;cursor:pointer;background:var(--subject-tint);color:#304665;font-size:14px;font-weight:600;line-height:1.35;overflow-wrap:anywhere;transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease}.wordchoice:hover{background:var(--subject-tint);border-color:var(--subject-line);color:var(--subject-ink);transform:translateY(-1px)}.wordchoice.selected{background:var(--subject-accent);border-color:var(--subject-accent);color:white;box-shadow:0 4px 10px color-mix(in srgb,var(--subject-accent) 18%,transparent)}.wordchoice.selected:hover{background:var(--subject-hover);border-color:var(--subject-hover)}.wordchoice:focus-visible{outline:3px solid var(--subject-focus);outline-offset:3px}.selectionstatus{margin:10px 0 0!important;font-size:13px!important;color:#5f7190!important}.selectionstatus.selectionempty{color:#b32837!important}.sessionback{white-space:nowrap}@media(max-width:850px){.wordchoices{grid-template-columns:repeat(4,minmax(0,1fr))}.selectiontools{font-size:12px}}@media(max-width:560px){.wordchoices{grid-template-columns:repeat(2,minmax(0,1fr))}.wordchoice{font-size:15px;padding:9px 7px;min-height:42px}.wordselect{padding:14px 11px 11px}.selectiontools{font-size:13px}.sessionback{font-size:13px!important;padding:9px 10px!important;max-width:13em;white-space:normal;text-align:left}}

/* 听写拼音：保留声调空间，长词按音节自然换行。 */
.practicepinyin{font-family:"Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;font-size:clamp(36px,7vw,64px);font-weight:500;line-height:1.65;letter-spacing:.035em;word-spacing:.16em;color:var(--subject-ink);overflow-wrap:anywhere;text-wrap:balance;margin:0 auto 8px;max-width:100%}
.practicebody .wave{height:48px;margin:8px 0 22px;transform:scale(.75)}

/* 听写复习：复用学科配色、白色卡片与圆角。 */
.study-tools{background:white;border:1px solid var(--line);border-radius:18px;padding:23px;margin:0 0 28px}
.tools-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.tools-heading h2{font-size:20px;margin:0}.tools-heading .eyebrow{font-size:11px}
.study-settings{display:flex;align-items:flex-end;flex-wrap:wrap;gap:16px;padding:20px 0;color:var(--muted);font-size:14px}
.study-settings label,.mix-actions label{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.study-settings select,.mix-actions select{max-width:100%;border:1px solid var(--line);background:#fafbfe;border-radius:8px;padding:9px;color:#203657}
.study-settings select:disabled{opacity:.5}.practice>.study-settings{padding:18px 28px;border-top:1px solid var(--line);background:#fafbfe}
.mixed-panel{border-top:1px solid var(--line);padding-top:17px}.mixed-panel summary{cursor:pointer;font-weight:650;color:var(--subject-accent);padding:4px 0}
.mixed-panel p{color:var(--muted);font-size:14px;line-height:1.8}.mixed-lessons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;max-height:280px;overflow:auto;padding:4px}
.mixed-lessons label{display:flex;align-items:flex-start;gap:8px;border:1px solid var(--line);padding:11px;border-radius:9px;font-size:14px;line-height:1.5;cursor:pointer;overflow-wrap:anywhere}
.mixed-lessons label:has(input:checked){background:var(--subject-tint);border-color:var(--subject-line);color:var(--subject-ink)}.mixed-lessons input{accent-color:var(--subject-accent);margin-top:4px;flex-shrink:0}
.mix-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:18px;font-size:14px;color:var(--muted)}
.resultlist .word-source{display:block;color:var(--muted);font-size:12px;line-height:1.6;margin-top:12px;overflow-wrap:anywhere}
.resultlist li{display:flex;flex-direction:column;min-width:0}.resultlist strong{overflow-wrap:anywhere}
.resultlist .mistake-toggle{position:static;margin-top:14px;min-height:40px;width:100%;border:1px solid var(--line);background:white;color:var(--muted);line-height:1.5}
.resultlist .mistake-toggle[aria-pressed="true"]{border-color:var(--subject-line);background:var(--subject-tint);color:var(--subject-ink)}
.practicefoot [hidden]{display:none}
@media(max-width:850px){.mixed-lessons{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.study-tools{padding:18px}.tools-heading h2{font-size:18px}.tools-heading>.btn{width:100%;text-align:left}.study-settings{gap:12px}.study-settings label:first-child{width:100%}.mixed-lessons{grid-template-columns:1fr;max-height:260px}.practice>.study-settings{padding:16px 18px}.mix-actions{align-items:stretch}.mix-actions>.btn{width:100%}.resultlist .mistake-toggle{font-size:12px;padding:8px 4px}}
@media print{.study-tools,.study-settings,.word-source+button{display:none}}