:root{--ink: #16324f;--ink-soft: #3d5a73;--muted: #6b8499;--brand: #0b8f85;--brand-deep: #067069;--brand-soft: #d5f3ef;--coral: #e86b5a;--coral-soft: #ffe8e4;--good: #1f9d6a;--good-soft: #ddf7eb;--warn: #d97706;--warn-soft: #fff1d6;--bad: #dc4a3d;--surface: #ffffff;--hairline: rgba(22, 50, 79, .12);--radius: 18px;--font-print: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;--font-display: var(--font-print);--font-ui: var(--font-print)}*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100%;font-family:var(--font-print);color:var(--ink);background:radial-gradient(ellipse 80% 50% at 10% -10%,#cfe9ff 0%,transparent 55%),radial-gradient(ellipse 60% 40% at 100% 0%,#c8f0e8 0%,transparent 50%),linear-gradient(180deg,#e8f3fa,#f5f8fb 45%,#eef2f6);-webkit-font-smoothing:antialiased;font-synthesis:none}button,input,textarea,select{font:inherit;font-family:inherit}#app{max-width:480px;margin:0 auto;min-height:100dvh;padding:20px 18px 40px}.brand{margin:8px 0 18px}.brand h1{font-family:var(--font-print);font-size:34px;letter-spacing:.02em;line-height:1.15;font-weight:700}.brand h1 em{font-style:normal;color:var(--brand)}.brand p{margin-top:6px;font-size:13px;font-weight:700;color:var(--muted)}.grid{display:grid;gap:12px}.mode-card{display:flex;gap:14px;align-items:center;text-align:left;width:100%;padding:16px;border-radius:var(--radius);border:1px solid var(--hairline);background:#ffffffe0;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}.mode-card:hover{transform:translateY(-2px);box-shadow:0 12px 28px #16324f1a}.mode-card .emoji{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;font-size:22px;background:var(--brand-soft);flex-shrink:0}.mode-card b{display:block;font-size:16px;font-weight:800}.mode-card span{font-size:12px;font-weight:700;color:var(--muted)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.icon-btn{width:40px;height:40px;border-radius:12px;border:1px solid var(--hairline);background:#ffffffe6;cursor:pointer;font-weight:800;color:var(--ink-soft)}.topbar h2{font-size:16px;font-weight:800}.progress{font-size:12px;font-weight:800;color:var(--brand-deep)}.panel{background:#ffffffeb;border:1px solid var(--hairline);border-radius:22px;padding:20px 18px}.eyebrow{font-size:11px;font-weight:800;color:var(--brand);letter-spacing:.04em;text-transform:uppercase}.prompt{margin:10px 0 6px;font-family:var(--font-print);font-size:28px;font-weight:700;line-height:1.35;letter-spacing:.01em;word-break:break-word}.meta{font-size:12px;font-weight:700;color:var(--muted);margin-bottom:16px}.row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.chip{border:none;border-radius:999px;padding:8px 12px;font-size:12px;font-weight:800;background:var(--brand-soft);color:var(--brand-deep);cursor:pointer}.input{width:100%;min-height:52px;border-radius:14px;border:1px solid var(--hairline);padding:12px 14px;font-size:16px;font-weight:700;color:var(--ink);background:#fff;outline:none}.input:focus{border-color:#0b8f8573;box-shadow:0 0 0 3px #0b8f851f}.actions{display:grid;gap:10px;margin-top:14px}.btn{min-height:48px;border:none;border-radius:16px;font-size:15px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:linear-gradient(180deg,#12a896,#0b8f85);color:#fff;box-shadow:0 10px 24px #0b8f8547}.btn-coral{background:linear-gradient(180deg,#f08374,#e86b5a);color:#fff;box-shadow:0 10px 24px #e86b5a47}.btn-ghost{background:#ffffffe6;color:var(--ink-soft);border:1px solid var(--hairline)}.btn:disabled{opacity:.55;cursor:not-allowed}.feedback{margin-top:14px;padding:12px 14px;border-radius:14px;font-size:13px;font-weight:700;line-height:1.45}.feedback.ok{background:var(--good-soft);color:var(--good)}.feedback.bad{background:var(--coral-soft);color:var(--bad)}.mic-zone{text-align:center;padding:8px 0 4px}.mic-btn{width:88px;height:88px;margin:8px auto;border-radius:50%;border:none;background:linear-gradient(180deg,#f08374,#e86b5a);color:#fff;font-size:32px;cursor:pointer;box-shadow:0 0 #e86b5a66;animation:pulse 2s ease-in-out infinite}.mic-btn.recording{background:linear-gradient(180deg,#ef6a58,#d94a38)}@keyframes pulse{0%,to{box-shadow:0 0 #e86b5a66}50%{box-shadow:0 0 0 14px #e86b5a00}}.hint{font-size:12px;font-weight:700;color:var(--muted)}.transcript{margin-top:10px;min-height:24px;font-size:14px;font-weight:700;color:var(--ink-soft)}.summary{text-align:center;padding:24px 8px}.summary .score{font-family:var(--font-print);font-size:56px;color:var(--brand-deep);line-height:1}.summary p{margin-top:10px;font-weight:700;color:var(--muted)}.unit-bar{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;margin-bottom:14px}.unit-bar button{flex:0 0 auto;border-radius:999px;border:1px solid var(--hairline);background:#fffc;padding:7px 12px;font-size:12px;font-weight:800;color:var(--ink-soft);cursor:pointer}.unit-bar button.on{background:var(--brand);color:#fff;border-color:transparent}.stats{margin-top:18px;font-size:12px;font-weight:700;color:var(--muted);text-align:center}.task-panel{background:#ffffffeb;border:1px solid var(--hairline);border-radius:22px;padding:18px 16px 16px;margin-bottom:14px}.task-panel h2{font-family:var(--font-print);font-size:22px;letter-spacing:.02em;line-height:1.2}.task-sub{margin-top:6px;font-size:13px;font-weight:700;color:var(--muted)}.progress-row{display:flex;gap:10px;margin:14px 0 16px}.prog-chip{flex:1;text-align:center;padding:10px 8px;border-radius:14px;background:var(--brand-soft)}.prog-chip b{display:block;font-size:18px;font-weight:800;color:var(--brand-deep)}.prog-chip span{font-size:11px;font-weight:800;color:var(--muted)}.section-title{margin:8px 0 10px;font-size:13px;font-weight:800;color:var(--ink-soft)}.weak-card{display:flex;gap:14px;align-items:center;text-align:left;width:100%;padding:14px 16px;margin-bottom:14px;border-radius:var(--radius);border:1px solid rgba(217,119,6,.25);background:var(--warn-soft);cursor:pointer}.weak-card .emoji{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;font-size:20px;background:#fff;flex-shrink:0}.weak-card b{display:block;font-size:15px;font-weight:800;color:#9a5b0a}.weak-card span{font-size:12px;font-weight:700;color:var(--muted)}.chip-ghost{background:#ffffffe6;color:var(--ink-soft);border:1px solid var(--hairline)}.demo-hint{font-size:13px;font-weight:800;color:var(--brand-deep);text-align:center;margin-bottom:4px}.meta-zh{margin:0 0 8px;font-size:15px;font-weight:700;color:var(--ink-soft)}.stars{font-size:22px;letter-spacing:.08em;color:#e6a23c;line-height:1.2}.stars.big{font-size:32px;margin-bottom:6px}.fb-title{margin-top:4px;font-size:15px;font-weight:800}.fb-score{margin:2px 0 8px;font-size:12px;opacity:.9}.fb-detail{margin-top:6px;font-size:12px;opacity:.85}.summary-meta{margin-top:6px!important;font-size:12px!important}.vol-pills{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 14px}.vol-pill{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand-deep);font-size:12px;font-weight:800}.book-entry .btn{width:100%}.catalog-load{margin:-4px 0 14px;font-size:12px;font-weight:700;color:var(--muted);text-align:center}.volume-title{font-family:var(--font-print);font-size:24px;letter-spacing:.02em;line-height:1.2}.volume-sub{margin:4px 0 12px;font-size:12px;font-weight:700;color:var(--muted)}.unit-list{display:grid;gap:10px}.unit-row{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:14px;border-radius:16px;border:1px solid var(--hairline);background:#ffffffeb;cursor:pointer}.unit-row:hover{border-color:#0b8f8559;box-shadow:0 8px 20px #16324f14}.unit-num{flex:0 0 auto;min-width:52px;height:40px;padding:0 8px;border-radius:12px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand-deep);font-size:12px;font-weight:800}.unit-info{flex:1;min-width:0}.unit-info b{display:block;font-size:15px;font-weight:800}.unit-info span{display:block;margin-top:2px;font-size:12px;font-weight:700;color:var(--muted)}.unit-chevron{font-size:22px;font-weight:700;color:var(--muted)}.unit-head{margin:4px 0 18px}.unit-head h1{margin-top:6px;font-family:var(--font-print);font-size:28px;letter-spacing:.02em;line-height:1.15}.unit-head>p{margin:6px 0 14px;font-size:13px;font-weight:700;color:var(--muted)}.exam-section{margin-bottom:18px;background:#ffffffeb;border:1px solid var(--hairline);border-radius:20px;padding:14px 14px 10px}.exam-section h3{font-size:15px;font-weight:800}.exam-hint{margin:4px 0 10px;font-size:12px;font-weight:700;color:var(--muted)}.exam-empty{padding:8px 0 12px;font-size:13px;font-weight:700;color:var(--muted)}.exam-list{list-style:none;display:grid;gap:8px;padding-bottom:6px}.exam-row{display:grid;grid-template-columns:28px 1fr auto;gap:10px;align-items:start;padding:10px 8px;border-radius:12px;background:#e8f3fa8c}.exam-idx{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;font-size:12px;font-weight:800;color:var(--brand-deep);background:#fff}.exam-pair{min-width:0}.exam-en{font-family:var(--font-print);font-size:15px;font-weight:700;line-height:1.35;word-break:break-word}.exam-zh{margin-top:3px;font-size:13px;font-weight:700;color:var(--ink-soft);line-height:1.4}.exam-ipa{margin-top:2px;font-size:11px;font-weight:700;color:var(--muted)}.exam-tag{font-size:10px;font-weight:800;color:var(--muted);padding-top:6px}.sticky-practice{margin-top:8px}.content-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0 0 14px;position:sticky;top:0;z-index:5;padding:6px 0 8px;background:linear-gradient(180deg,#e8f3faf5 60%,#e8f3fabf);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.content-tab{min-height:48px;border-radius:14px;border:1px solid var(--hairline);background:#ffffffeb;font-size:14px;font-weight:800;color:var(--ink-soft);cursor:pointer}.content-tab em{font-style:normal;margin-left:4px;color:var(--brand-deep)}.content-tab.on{background:var(--brand);border-color:transparent;color:#fff}.content-tab.on em{color:#fff}.tab-switch-hint{text-align:center;margin:-8px 0 28px}.linkish{border:none;background:none;color:var(--brand-deep);font-size:13px;font-weight:800;cursor:pointer;text-decoration:underline;text-underline-offset:3px}
