:root{--paper: #f6f3ec;--ink: #1f1f1f;--ink-soft: #4a4a4a;--green: #2f5d50;--green-soft: #e3ede8;--red: #c8432b;--line: #d9d4c7;--card: #fffdf8;font-size:18px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,PingFang SC,Noto Sans CJK SC,Microsoft YaHei,sans-serif;line-height:1.8}#app{min-height:100vh}a{color:var(--green)}button{font:inherit}.page{max-width:640px;margin:0 auto;padding:20px 18px calc(32px + env(safe-area-inset-bottom))}.page.wide{max-width:980px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.topbar .title{font-size:1.1rem;font-weight:600;color:var(--green)}.topbar .links{display:flex;gap:14px;font-size:.95rem}.chapter{color:var(--ink-soft);font-size:1rem;margin-bottom:6px}.question{font-size:1.55rem;font-weight:600;line-height:1.6;margin:0 0 24px}.hint{color:var(--ink-soft);font-size:.95rem}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;margin-bottom:16px}.article{font-size:1.25rem;line-height:2}.article .clause{cursor:pointer;border-bottom:2px dotted transparent}.article .clause:active,.article .clause.editing{background:#fff2cc}.article .clause.changed{border-bottom-color:var(--green)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 20px;border-radius:14px;border:2px solid var(--green);background:var(--green);color:#fff;font-size:1.15rem;font-weight:600;cursor:pointer;min-height:56px}.btn.secondary{background:transparent;color:var(--green)}.btn.danger{background:var(--red);border-color:var(--red)}.btn.ghost{background:transparent;border-color:var(--line);color:var(--ink-soft);font-weight:500}.btn.block{width:100%}.btn.small{min-height:40px;padding:8px 14px;font-size:.95rem;border-radius:10px}.btn:disabled{opacity:.5;cursor:default}.stack{display:flex;flex-direction:column;gap:12px}.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.row.between{justify-content:space-between}.grow{flex:1}.record-btn{width:180px;height:180px;border-radius:50%;border:none;background:var(--red);color:#fff;font-size:1.35rem;font-weight:700;box-shadow:0 10px 30px #c8432b59;margin:12px auto;display:flex;flex-direction:column;align-items:center;justify-content:center;user-select:none;-webkit-user-select:none;touch-action:none;cursor:pointer}.record-btn.recording{background:#8f2a18;animation:pulse 1.2s infinite}.record-btn .timer{font-size:1rem;font-weight:500;margin-top:4px}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.center{text-align:center}.status{font-size:1rem;color:var(--ink-soft);margin:8px 0}.status.error{color:var(--red)}.status.ok{color:var(--green)}input,textarea,select{font:inherit;width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink)}input.code{font-size:2rem;letter-spacing:.4em;text-align:center;font-weight:600}textarea{min-height:160px;line-height:1.8}label{display:block;font-size:.95rem;color:var(--ink-soft);margin-bottom:4px}.field{margin-bottom:14px}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:flex-end;justify-content:center;z-index:50}.modal{background:var(--card);width:100%;max-width:640px;border-radius:20px 20px 0 0;padding:20px 18px calc(24px + env(safe-area-inset-bottom));max-height:85vh;overflow:auto}.modal h3{margin:0 0 12px;font-size:1.2rem}.diff{font-size:1.2rem;line-height:1.8}.diff .old{color:var(--red);text-decoration:line-through}.diff .new{color:var(--green);font-weight:600}.list{list-style:none;margin:0;padding:0}.list li{padding:12px 0;border-bottom:1px solid var(--line)}.list li:last-child{border-bottom:none}.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.8rem;background:var(--green-soft);color:var(--green);margin-right:6px}.badge.warn{background:#fde8e4;color:var(--red)}.badge.muted{background:#ebe7dc;color:var(--ink-soft)}.muted{color:var(--ink-soft)}.small{font-size:.9rem}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}table{width:100%;border-collapse:collapse;font-size:.95rem}th,td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}.home-btn{display:block;padding:26px 20px;border-radius:18px;background:var(--card);border:1.5px solid var(--line);text-decoration:none;color:var(--ink);margin-bottom:14px}.home-btn strong{display:block;font-size:1.3rem;color:var(--green)}.guide{background:#fff8e1;border:1.5px solid #f0d78c;border-radius:16px;padding:18px;font-size:1.1rem}