:root{--bg: #f6f4ef;--card: #ffffff;--ink: #23262b;--muted: #6b6f76;--line: #e2ded5;--accent: #2f5d62;--accent-soft: #e3eeee;--ok: #2e7d4f;--ok-soft: #e4f3ea;--fix: #9a6a12;--fix-soft: #fbf1dc;--ng: #b3403a;--ng-soft: #f9e6e4;--hold: #5b5f8a;--hold-soft: #eaebf5;--radius: 14px;--font: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", sans-serif;--font-zh: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;color-scheme:light}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.6;-webkit-text-size-adjust:100%}[lang=zh-CN]{font-family:var(--font-zh)}button,input,select,textarea{font:inherit;color:inherit}h1{font-size:1.25rem;margin:0}h2{font-size:1.1rem;margin:.2rem 0 .6rem}h3{font-size:.95rem;margin:0 0 .5rem;color:var(--muted)}.page{min-height:100dvh;display:flex;flex-direction:column;padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}.page-header,.home-header,.study-header{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;padding:calc(10px + env(safe-area-inset-top)) 16px 10px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}.page-header h1{text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.home-header{grid-template-columns:1fr auto}.page-body{width:100%;max-width:980px;margin:0 auto;padding:16px 16px calc(24px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:14px}.loading{padding:40px;text-align:center}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.card.disabled,.list-item.disabled{opacity:.55}.card.ai{border-style:dashed;border-color:var(--accent)}.card.caution,.caution{background:var(--fix-soft);border-color:#eadbb5}.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:8px}.col{display:flex;flex-direction:column;gap:10px}.grow{flex:1;min-width:0}.spacer{flex:1}.center{text-align:center}.muted{color:var(--muted)}.small{font-size:.85rem}.nowrap{white-space:nowrap}.pre{white-space:pre-wrap}.ellipsis{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.warn-text,.warn .warn-text,.counts .warn b{color:var(--ng)}.btn{min-height:48px;padding:10px 18px;border-radius:12px;border:1px solid var(--line);background:var(--card);cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:default}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}.btn.danger{border-color:var(--ng);color:var(--ng)}.btn.ghost{background:transparent;border-color:transparent;color:var(--accent)}.btn.small{min-height:38px;padding:6px 12px;font-size:.9rem}.btn.big{min-height:56px;font-size:1.05rem}.btn.huge{min-height:64px;font-size:1.15rem;width:100%}.linklike{background:none;border:none;color:var(--accent);text-decoration:underline;padding:0 4px;cursor:pointer}.conn{font-size:.8rem;color:var(--ng);cursor:pointer;text-align:right;max-width:50vw}.conn.ok{color:var(--ok)}.start-card{display:flex;flex-direction:column;gap:12px}.counts{display:flex;gap:8px;flex-wrap:wrap}.counts>div{flex:1;min-width:90px;text-align:center;background:var(--bg);border-radius:12px;padding:10px 6px}.counts b{display:block;font-size:1.6rem;line-height:1.2}.counts span{font-size:.8rem;color:var(--muted)}.size-select{display:flex;gap:8px}.seg{flex:1;min-height:52px;border-radius:12px;border:1px solid var(--line);background:var(--card);font-size:1.05rem}.seg.active{background:var(--accent-soft);border-color:var(--accent);font-weight:600}.menu{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}.menu-btn{min-height:64px;font-size:1.05rem}.notice{background:var(--accent-soft);border-radius:12px;padding:10px 14px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.study{height:100dvh;overflow:hidden}.study-header{grid-template-columns:auto auto 1fr}.progress{font-weight:600}.progress-bar{height:6px;background:var(--line);border-radius:3px;overflow:hidden}.progress-bar div{height:100%;background:var(--accent)}.study-grid{flex:1;min-height:0;display:grid;gap:12px;padding:12px 12px calc(12px + env(safe-area-inset-bottom));grid-template-columns:1fr;grid-template-rows:auto 1fr}@media (orientation: landscape) and (min-width: 700px){.study-grid{grid-template-columns:minmax(260px,32%) 1fr;grid-template-rows:1fr}}.question-pane{display:flex;flex-direction:column;gap:10px;overflow-y:auto;min-height:0;max-height:100%}@media (orientation: portrait),(max-width: 699px){.question-pane{max-height:42dvh}.question-pane .actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.question-pane .actions .btn.huge{grid-column:1 / -1;min-height:56px}.question-pane .actions .row{display:contents}}.label{font-size:.8rem;color:var(--muted)}.prompt-ja{font-size:1.35rem;line-height:1.55;font-weight:500;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}.small-prompt{font-size:1.1rem}.hints{display:flex;flex-direction:column;gap:8px}.hint-box{background:var(--accent-soft);border-radius:12px;padding:10px 12px}.hint-box p{margin:4px 0 0}.actions{margin-top:auto;display:flex;flex-direction:column;gap:8px}.actions .row{margin-top:0}.actions .row .btn{flex:1}.board-pane{min-height:0;display:flex}.board{flex:1;min-height:260px;display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.board-tools{display:flex;gap:6px;padding:8px;border-bottom:1px solid var(--line);flex-wrap:wrap}.tool{min-height:44px;min-width:64px;padding:6px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);touch-action:manipulation}.tool.active{background:var(--accent);color:#fff;border-color:var(--accent)}.tool.danger{background:var(--ng);color:#fff;border-color:var(--ng)}.tool:disabled{opacity:.4}.board-surface{position:relative;flex:1;min-height:0;background:#fff;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;overflow:hidden}.board-canvas{position:absolute;inset:0;display:block;touch-action:none}.board-placeholder{position:absolute;inset:0;display:grid;place-items:center;color:#c9c5bc;pointer-events:none;font-size:1.1rem}.board-note{position:absolute;bottom:10px;left:10px;right:10px;text-align:center;font-size:.85rem;color:var(--muted);pointer-events:none}.study-result .page-body{padding-bottom:110px}.sticky-footer{position:fixed;bottom:0;left:0;right:0;display:flex;gap:10px;justify-content:flex-end;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:#f6f4eff2;border-top:1px solid var(--line);z-index:5}.sticky-footer .btn.primary{min-width:220px}.result{display:flex;flex-direction:column;gap:12px}.verdict{display:flex;align-items:center;gap:12px;padding:14px 18px;border-radius:var(--radius);font-size:1.25rem;font-weight:600}.verdict .mark{font-size:1.9rem;line-height:1}.verdict.ok{background:var(--ok-soft);color:var(--ok)}.verdict.fix{background:var(--fix-soft);color:var(--fix)}.verdict.ng{background:var(--ng-soft);color:var(--ng)}.verdict.hold{background:var(--hold-soft);color:var(--hold)}.expr-line{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:6px}.zh-block{margin:4px 0 8px}.zh{font-size:1.2rem}.zh-block.big .zh{font-size:1.45rem}.pinyin,.pinyin-inline{color:var(--muted);font-size:.95rem}.zh-inline{font-family:var(--font-zh);font-size:1.15rem;font-weight:600}.answer-img{max-width:100%;max-height:260px;border:1px solid var(--line);border-radius:10px;background:#fff;display:block;margin-bottom:10px}.read-text{border-top:1px dashed var(--line);padding-top:8px}.edit-box textarea,textarea,input:not([type=checkbox]):not([type=radio]):not([type=file]),select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;min-height:44px}textarea{resize:vertical}.fixes{padding-left:1.2rem;margin:6px 0 0}.fixes li{margin-bottom:6px}.del{text-decoration:line-through;color:var(--ng)}.ins{color:var(--ok);font-weight:600}.ins.soft{color:var(--accent)}.status-line{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--accent-soft);padding:12px 14px;border-radius:12px}.spinner{width:18px;height:18px;border:3px solid var(--accent);border-right-color:transparent;border-radius:50%;animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-box{background:var(--ng-soft);border-radius:12px;padding:12px 14px}.error-box.hold{background:var(--hold-soft)}.mock-banner{background:#fff3c4;border:2px dashed #d9a400;border-radius:12px;padding:10px 14px;font-weight:600}.badge{display:inline-block;font-size:.78rem;padding:2px 8px;border-radius:999px;background:var(--bg);color:var(--muted);white-space:nowrap}.badge.ok{background:var(--ok-soft);color:var(--ok)}.badge.fix{background:var(--fix-soft);color:var(--fix)}.badge.ng,.badge.ng-soft{background:var(--ng-soft);color:var(--ng)}.badge.hold{background:var(--hold-soft);color:var(--hold)}.badge.new{background:var(--accent-soft);color:var(--accent)}.badge.mock{background:#fff3c4;color:#8a6a00}.badges{display:flex;gap:4px;flex-wrap:wrap;align-items:center;justify-content:flex-end}.list{list-style:none;margin:0;padding:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.list-item{display:flex;gap:10px;align-items:center;padding:12px 14px;border-bottom:1px solid var(--line);cursor:pointer;min-height:52px}.list-item:last-child{border-bottom:none}.list.compact .list-item{padding:8px 12px}.word-groups{display:flex;flex-direction:column;gap:12px}.word-head{display:flex;gap:10px;align-items:baseline;padding:4px 4px 6px;cursor:pointer}.filters{display:flex;flex-direction:column;gap:8px}.chips{display:flex;gap:6px;flex-wrap:wrap;align-items:center}.chip{min-height:40px;padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card)}.chip.active{background:var(--accent);border-color:var(--accent);color:#fff}.select-bar{position:sticky;top:64px;z-index:4;display:flex;gap:8px;flex-wrap:wrap;align-items:center;background:var(--card);border:1px solid var(--accent);border-radius:12px;padding:8px 12px}.tabs{display:flex;gap:4px;flex-wrap:wrap}.tab{flex:1;min-height:48px;border:1px solid var(--line);background:var(--card);border-radius:10px;padding:6px 10px}.tab.active{background:var(--accent);color:#fff;border-color:var(--accent)}.entry-head{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.entry-head .hw{width:10em!important;font-family:var(--font-zh);font-weight:600}.entry-head .py{width:12em!important}.item{border-top:1px dashed var(--line);margin-top:10px;padding-top:10px;display:flex;flex-direction:column;gap:6px}.item-head{display:flex;gap:8px;align-items:center}.item-head select{width:auto;margin-left:auto}.warn-list{margin:0;padding-left:1.2rem;color:var(--fix)}.raw{white-space:pre-wrap;background:var(--bg);padding:8px;border-radius:8px;font-size:.8rem;max-height:300px;overflow:auto}details summary{cursor:pointer;padding:4px 0}.dict div{margin-bottom:6px}.dict dt{font-size:.8rem;color:var(--muted)}.dict dd{margin:0}.form{display:flex;flex-direction:column;gap:10px}label{display:flex;flex-direction:column;gap:4px}label.radio{flex-direction:row;align-items:center;gap:10px;min-height:44px}label.radio input{width:22px;height:22px}.restore-box{margin-top:10px;background:var(--bg);border-radius:12px;padding:12px}.modal-backdrop{position:fixed;inset:0;background:#00000059;display:grid;place-items:center;z-index:20;padding:16px}.modal{background:var(--card);border-radius:18px;padding:20px;width:min(420px,100%)}