.logo[data-v-f6f6381e]{display:inline-flex;align-items:center;gap:11px;margin:0;color:var(--ink);line-height:1}.logo__seal[data-v-f6f6381e]{position:relative;display:grid;grid-template-columns:1fr 1fr;place-items:center;width:36px;height:36px;border:3px double currentColor;font-family:var(--display);font-size:15px;letter-spacing:-.08em}.logo__seal[data-v-f6f6381e]:after{content:"";position:absolute;top:4px;bottom:4px;left:50%;border-left:1px solid currentColor;opacity:.35}.logo__seal b[data-v-f6f6381e]{font-weight:800}.logo__copy[data-v-f6f6381e]{display:flex;flex-direction:column;align-items:flex-start}.logo__wordmark[data-v-f6f6381e]{font-family:var(--display);font-size:23px;font-weight:800;letter-spacing:-.035em;white-space:nowrap}.logo__copy small[data-v-f6f6381e]{margin-top:4px;font-family:var(--mono);font-size:9px;font-weight:500;letter-spacing:.17em;white-space:nowrap}.logo--masthead[data-v-f6f6381e]{gap:clamp(16px,2vw,28px)}.logo--masthead .logo__seal[data-v-f6f6381e]{width:clamp(62px,7vw,86px);height:clamp(62px,7vw,86px);border-width:4px;font-size:clamp(25px,2.8vw,36px)}.logo--masthead .logo__seal[data-v-f6f6381e]:after{top:8px;bottom:8px}.logo--masthead .logo__wordmark[data-v-f6f6381e]{font-size:clamp(54px,7vw,94px);letter-spacing:-.055em}.logo--masthead .logo__copy small[data-v-f6f6381e]{margin-top:7px;font-size:clamp(9px,1vw,12px);letter-spacing:.24em}@media(max-width:560px){.logo--masthead[data-v-f6f6381e]{gap:12px}.logo--masthead .logo__seal[data-v-f6f6381e]{width:52px;height:52px;font-size:22px}.logo--masthead .logo__wordmark[data-v-f6f6381e]{font-size:44px}}.toast-enter-active[data-v-a061dce9]{transition:all .4s cubic-bezier(.22,.61,.36,1)}.toast-leave-active[data-v-a061dce9]{transition:all .35s ease}.toast-enter-from[data-v-a061dce9],.toast-leave-to[data-v-a061dce9]{opacity:0;transform:translate(24px)}.page-enter-active[data-v-880dea43]{transition:opacity .45s ease,transform .45s cubic-bezier(.22,.61,.36,1)}.page-leave-active[data-v-880dea43]{transition:opacity .2s ease}.page-enter-from[data-v-880dea43]{opacity:0;transform:translateY(10px)}.page-leave-to[data-v-880dea43]{opacity:0}@media(prefers-reduced-motion:reduce){.page-enter-active[data-v-880dea43],.page-leave-active[data-v-880dea43]{transition:none}.page-enter-from[data-v-880dea43]{transform:none}}.masthead__title p[data-v-c02390dc]{margin:0 0 6px;font-family:var(--serif-tc);font-size:18px;color:var(--ink-soft)}.masthead__meta[data-v-c02390dc]{font-size:14px}.front-page .btn[data-v-c02390dc]{font-size:16px}.front-page[data-v-c02390dc]{padding-top:34px;padding-bottom:80px}.front-page__lead[data-v-c02390dc]{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(320px,.75fr);gap:54px;padding-bottom:42px;border-bottom:3px double var(--ink)}.section-label[data-v-c02390dc],.edition-heading>div[data-v-c02390dc]{display:flex;align-items:baseline;gap:14px;margin:0;font-family:var(--mono);font-size:14px;letter-spacing:.14em;text-transform:uppercase}.section-label b[data-v-c02390dc],.edition-heading b[data-v-c02390dc]{font-family:var(--serif-tc);font-size:16px;letter-spacing:.04em}.lead-story h2[data-v-c02390dc]{max-width:760px;margin:20px 0 10px;font-family:Georgia,Times New Roman,serif;font-size:clamp(40px,4.2vw,56px);font-weight:700;line-height:1;letter-spacing:-.035em}.lead-story__zh[data-v-c02390dc]{margin:20px 0 0;font-family:var(--serif-tc);font-size:clamp(20px,2vw,28px);color:var(--primary);font-weight:700}.lead-story__deck[data-v-c02390dc]{max-width:54ch;margin:22px 0 0;font-family:var(--serif-tc);font-size:18px;line-height:1.9;color:var(--ink-soft);font-weight:700}.lead-story__actions[data-v-c02390dc]{display:flex;align-items:center;gap:14px;margin-top:28px}.text-link[data-v-c02390dc]{font-family:var(--mono);font-size:16px;letter-spacing:.06em;color:var(--primary);border-bottom:1px solid var(--secondary);padding-bottom:3px}.continue-panel[data-v-c02390dc]{align-self:end;padding:20px 22px 16px;border:1px solid var(--border);border-top:4px double var(--ink);background:var(--paper-2);box-shadow:0 16px 38px -28px #23423373}.continue-panel header[data-v-c02390dc]{display:flex;justify-content:space-between;padding-bottom:10px;border-bottom:1px solid var(--border);font-family:var(--mono);font-size:14px;letter-spacing:.12em;text-transform:uppercase}.continue-panel header b[data-v-c02390dc]{font-family:var(--serif-tc);font-weight:400}.continue-panel__number[data-v-c02390dc]{float:right;margin:14px 0 0 16px;font-family:var(--display);font-size:58px;line-height:.8;color:var(--secondary)}.continue-panel>small[data-v-c02390dc]{display:block;margin-top:18px;font-family:var(--mono);font-size:14px;letter-spacing:.1em;color:var(--ink-faint)}.continue-panel h3[data-v-c02390dc]{margin:6px 0 2px;font-family:var(--display);font-size:28px}.continue-panel>p[data-v-c02390dc]:not(.continue-panel__number){margin:0;font-family:var(--serif-tc);font-size:18px;color:var(--primary)}.continue-panel blockquote[data-v-c02390dc]{clear:both;margin:18px 0 16px;padding:12px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);font-family:var(--serif-tc);font-size:17px;line-height:1.7;color:var(--ink-soft)}.continue-panel__progress[data-v-c02390dc]{display:flex;justify-content:space-between;margin-bottom:8px;font-family:var(--mono);font-size:14px;color:var(--ink-faint)}.continue-panel__link[data-v-c02390dc]{display:flex;justify-content:flex-start;align-items:center;gap:12px;margin-top:14px;padding:12px 0 2px;border-top:3px double var(--ink);font-family:var(--serif-tc);font-size:18px;color:var(--primary);font-weight:700}.today-lesson[data-v-c02390dc],.chapter-editions[data-v-c02390dc]{padding:42px 0;border-bottom:1px solid var(--ink)}.edition-heading[data-v-c02390dc]{display:flex;justify-content:space-between;align-items:baseline;padding-bottom:13px;border-bottom:2px solid var(--ink)}.edition-heading>p[data-v-c02390dc],.edition-heading>small[data-v-c02390dc]{margin:0;font-family:var(--mono);font-size:14px;color:var(--ink-faint)}.lesson-layout[data-v-c02390dc]{display:grid;grid-template-columns:minmax(0,.9fr) minmax(420px,1.1fr);gap:48px;align-items:center;padding:34px 0 4px}.lesson-copy h3[data-v-c02390dc]{margin:12px 0 3px;font-family:var(--mono);font-size:36px;color:var(--primary)}.lesson-copy__zh[data-v-c02390dc]{font-family:var(--serif-tc);font-size:20px;color:var(--ink)}.lesson-copy>p[data-v-c02390dc]:last-of-type{max-width:48ch;margin-bottom:24px;font-size:18px;line-height:1.8;color:var(--ink-soft)}.lesson-terminal[data-v-c02390dc]{overflow:hidden;border:1px solid var(--code-line);border-radius:8px;background:var(--terminal-bg);box-shadow:var(--shadow)}.lesson-terminal__bar[data-v-c02390dc]{display:flex;align-items:center;gap:7px;padding:13px 16px;border-bottom:1px solid var(--code-line)}.lesson-terminal__bar i[data-v-c02390dc]{width:9px;height:9px;border-radius:50%;background:var(--danger)}.lesson-terminal__bar i[data-v-c02390dc]:nth-child(2){background:var(--warning)}.lesson-terminal__bar i[data-v-c02390dc]:nth-child(3){background:var(--success)}.lesson-terminal__bar span[data-v-c02390dc]{margin-left:auto;font-family:var(--mono);font-size:14px;letter-spacing:.12em;color:var(--ink-faint)}.lesson-terminal pre[data-v-c02390dc]{margin:0;min-height:145px;padding:32px;background:var(--terminal-bg);color:var(--code-fg);font-family:var(--mono);font-size:16px;line-height:2}.lesson-terminal pre b[data-v-c02390dc]{color:var(--success)}.lesson-terminal pre span[data-v-c02390dc]{color:var(--warning)}.lesson-terminal pre em[data-v-c02390dc]{color:var(--ink-faint);font-style:normal}.chapter-editions__grid[data-v-c02390dc]{display:grid;grid-template-columns:repeat(3,1fr);border-left:1px solid var(--border)}.chapter-edition[data-v-c02390dc]{min-height:160px;padding:24px;border-right:1px solid var(--border);border-bottom:1px solid var(--border);transition:background .2s}.chapter-edition[data-v-c02390dc]:hover{background:var(--secondary-2)}.chapter-edition>span[data-v-c02390dc],.chapter-edition small[data-v-c02390dc]{font-family:var(--mono);font-size:14px;letter-spacing:.1em;color:var(--ink-faint)}.chapter-edition h3[data-v-c02390dc]{margin:18px 0 3px;font-family:var(--display);font-size:26px}.chapter-edition p[data-v-c02390dc]{margin:0 0 18px;font-family:var(--serif-tc);font-size:17px;color:var(--primary)}.reference-invitation[data-v-c02390dc]{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:42px 0;border-bottom:3px double var(--ink)}.reference-invitation span[data-v-c02390dc]{font-family:var(--mono);font-size:14px;letter-spacing:.12em;color:var(--primary)}.reference-invitation h2[data-v-c02390dc]{margin:7px 0 0;font-family:var(--serif-tc);font-size:28px;font-weight:600}@media(max-width:900px){.front-page__lead[data-v-c02390dc],.lesson-layout[data-v-c02390dc]{grid-template-columns:1fr}.front-page__lead[data-v-c02390dc]{gap:38px}.continue-panel[data-v-c02390dc]{width:100%}.chapter-editions__grid[data-v-c02390dc]{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.front-page[data-v-c02390dc]{padding-top:24px}.lead-story h2[data-v-c02390dc]{font-size:40px}.lead-story__actions[data-v-c02390dc],.edition-heading[data-v-c02390dc],.reference-invitation[data-v-c02390dc]{align-items:flex-start;flex-direction:column}.chapter-editions__grid[data-v-c02390dc]{grid-template-columns:1fr}.chapter-edition[data-v-c02390dc]{min-height:130px}.lesson-terminal pre[data-v-c02390dc]{min-height:120px;padding:22px;font-size:16px}}.reference-book[data-v-37b0d821]{--book-body: 16px;padding-top:16px;padding-bottom:28px}.book-header[data-v-37b0d821]{display:flex;justify-content:space-between;align-items:end;gap:28px;padding:0 0 10px;border-bottom:3px double var(--ink)}.book-header>div[data-v-37b0d821]{display:flex;align-items:baseline;gap:14px;font-family:var(--mono);font-size:15px;letter-spacing:.14em;text-transform:uppercase}.book-header b[data-v-37b0d821]{font-family:var(--serif-tc);font-size:18px;letter-spacing:.04em}.book-search[data-v-37b0d821]{display:flex;align-items:center;gap:10px;font-family:var(--serif-tc);font-size:14px}.book-search input[data-v-37b0d821]{width:210px;padding:8px 4px;border:0;border-bottom:1px solid var(--ink);background:transparent;font-family:var(--mono);font-size:14px}.book-chapters[data-v-37b0d821]{display:grid;grid-template-columns:repeat(6,1fr);border-bottom:1px solid var(--ink)}.book-chapters a[data-v-37b0d821]{display:grid;grid-template-columns:auto 1fr;gap:2px 8px;padding:9px 12px;border-right:1px solid var(--border);color:var(--ink-soft)}.book-chapters a[data-v-37b0d821]:last-child{border-right:0}.book-chapters small[data-v-37b0d821]{grid-row:1 / 3;font-family:var(--mono);font-size:14px;color:var(--ink-faint)}.book-chapters span[data-v-37b0d821]{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--display);font-size:15px;font-weight:700}.book-chapters b[data-v-37b0d821]{font-family:var(--serif-tc);font-size:14px;font-weight:400;color:var(--ink-faint)}.book-chapters a.active[data-v-37b0d821]{background:var(--secondary-2);color:var(--primary)}.book-chapters a.active small[data-v-37b0d821]{color:var(--warning)}.book-command-nav[data-v-37b0d821]{display:grid;grid-template-columns:150px 1fr;align-items:stretch;border-bottom:1px solid var(--ink)}.book-command-nav>header[data-v-37b0d821]{display:flex;flex-direction:column;justify-content:center;gap:3px;padding:9px 14px 9px 0;border-right:1px solid var(--border)}.book-command-nav>header span[data-v-37b0d821]{font-family:var(--serif-tc);font-size:16px;font-weight:700;color:var(--ink)}.book-command-nav>header b[data-v-37b0d821]{font-family:var(--serif-tc);font-size:14px;font-weight:400;color:var(--ink-faint)}.book-command-strip[data-v-37b0d821]{display:flex;gap:8px;overflow-x:auto;padding:8px 0 8px 12px}.book-command-strip a[data-v-37b0d821]{flex:none;display:flex;align-items:center;gap:12px;min-width:154px;padding:8px 11px;border:1px solid var(--border);background:var(--paper-2);font-family:var(--mono);color:var(--ink-soft);transition:border-color .18s,background .18s}.book-command-strip a>span[data-v-37b0d821]{font-size:15px}.book-command-strip a small[data-v-37b0d821]{margin-left:auto;font-family:var(--serif-tc);font-size:14px;color:var(--ink-faint)}.book-command-strip a[data-v-37b0d821]:hover{border-color:var(--primary);color:var(--primary)}.book-command-strip a.active[data-v-37b0d821]{border-color:var(--primary);background:var(--secondary-2);color:var(--primary);font-weight:700}.book-command-strip a.active small[data-v-37b0d821]{color:var(--primary)}.newspaper-title[data-v-37b0d821]{padding:13px 22px 15px;border:1px solid var(--border);border-bottom:3px double var(--ink);background:var(--paper-2)}.newspaper-title__eyebrow[data-v-37b0d821]{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:14px;letter-spacing:.13em;color:var(--ink-faint);text-transform:uppercase}.newspaper-title__eyebrow b[data-v-37b0d821]{font-family:var(--display);font-size:28px;font-weight:500;color:var(--secondary)}.newspaper-title__main[data-v-37b0d821]{display:flex;justify-content:space-between;align-items:end;gap:28px}.newspaper-title h1[data-v-37b0d821]{margin:2px 0 0;font-family:var(--mono);font-size:clamp(32px,3.7vw,48px);line-height:1;color:var(--primary)}.newspaper-title p[data-v-37b0d821]{margin:7px 0 0;font-family:var(--serif-tc);font-size:19px;color:var(--ink)}.newspaper-title__tools[data-v-37b0d821]{display:flex;align-items:center;gap:12px;font-family:var(--mono);font-size:14px;letter-spacing:.1em;color:var(--ink-faint);text-transform:uppercase}.book-spread[data-v-37b0d821]{position:relative;display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--border);border-top:0;background:var(--paper-2);box-shadow:0 24px 55px -42px #2342338c}.book-page[data-v-37b0d821]{min-width:0;padding:20px 26px 24px}.book-page section[data-v-37b0d821]{margin-bottom:16px;padding-bottom:16px;border-bottom:3px double var(--ink)}.book-page__label[data-v-37b0d821]{display:block;margin-bottom:7px;font-family:var(--mono);font-size:14px;letter-spacing:.12em;color:var(--primary);text-transform:uppercase}.book-page h2[data-v-37b0d821]{margin:0 0 8px;font-family:var(--display);font-size:23px}.book-page h3[data-v-37b0d821]{margin:0 0 6px;font-family:var(--display);font-size:20px}.book-page p[data-v-37b0d821]{margin:0;font-family:var(--serif-tc);font-size:var(--book-body);line-height:1.65;color:var(--ink-soft)}.book-page .book-lead[data-v-37b0d821]{font-size:var(--book-body);color:var(--ink)}.book-practice-grid[data-v-37b0d821],.book-notes-grid[data-v-37b0d821],.book-left-bottom[data-v-37b0d821]{display:grid;grid-template-columns:1fr 1fr;gap:24px}.book-left-bottom[data-v-37b0d821]{grid-template-columns:1fr;gap:0}.book-lead-story .book-lead[data-v-37b0d821]{max-width:52ch}.book-left-bottom[data-v-37b0d821]{padding-top:16px}.book-left-bottom>section+section[data-v-37b0d821]{margin-top:0}.book-practice-grid[data-v-37b0d821]{grid-template-columns:1fr;gap:0}.book-terminal-section[data-v-37b0d821]{grid-column:1 / -1}.book-page--left .book-workflow[data-v-37b0d821],.book-page--right .book-terminal-section[data-v-37b0d821]{margin-bottom:0;padding-bottom:0;border-bottom:0}.book-notes-grid[data-v-37b0d821]{grid-template-columns:1fr;gap:0}.book-footer-flex[data-v-37b0d821]{grid-column:1 / -1;display:flex;border-top:3px double var(--ink);border-bottom:0}.book-footer-flex>section[data-v-37b0d821]{flex:1;padding:18px 26px 20px}.book-footer-flex h3[data-v-37b0d821]{margin:0 0 10px;font-family:var(--display);font-size:20px}.editor-mark[data-v-37b0d821]{margin-top:34px;padding:15px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);font-family:var(--serif-tc);font-size:16px;color:var(--primary)}.book-page blockquote[data-v-37b0d821]{margin:34px 0 0;padding:18px 0 0;border-top:3px double var(--ink);font-family:var(--serif-tc);font-size:17px;line-height:1.8;color:var(--ink-soft)}.book-flow[data-v-37b0d821]{display:flex;align-items:center;gap:7px;margin-top:10px;text-align:center}.book-flow div[data-v-37b0d821]{flex:1;padding:7px 3px;border-top:1px solid var(--border);border-bottom:1px solid var(--border);font-family:var(--serif-tc);font-size:14px}.book-flow div.active[data-v-37b0d821]{border-color:var(--primary);color:var(--primary);font-weight:700}.book-flow span[data-v-37b0d821]{color:var(--warning);font-size:17px}.book-syntax>div[data-v-37b0d821]{padding:7px 0;border-top:1px solid var(--border)}.book-syntax code[data-v-37b0d821]{font-family:var(--mono);font-size:var(--book-body);color:var(--primary)}.book-syntax p[data-v-37b0d821]{margin-top:3px;font-size:var(--book-body)}.book-terminal[data-v-37b0d821]{margin-top:4px}.book-terminal .codeblock__bar[data-v-37b0d821]{padding:7px 10px}.book-terminal pre[data-v-37b0d821]{min-height:104px;max-height:150px;padding:10px 12px;font-size:var(--book-body);line-height:1.5;white-space:pre-wrap;overflow:auto}.book-terminal pre em[data-v-37b0d821]{display:block;margin-top:8px;color:var(--code-muted);font-style:normal}.book-output-note[data-v-37b0d821]{margin-top:16px!important;padding-left:11px;border-left:2px solid var(--secondary);font-size:var(--book-body)!important;line-height:1.5!important}.book-mistakes[data-v-37b0d821]{list-style:none;margin:0;padding:0}.book-mistakes li[data-v-37b0d821]{position:relative;padding:7px 0 7px 20px;border-top:1px solid var(--border);font-family:var(--serif-tc);font-size:var(--book-body);line-height:1.5}.book-mistakes li[data-v-37b0d821]:before{content:"×";position:absolute;left:0;color:var(--danger);font-weight:700}.book-related[data-v-37b0d821]{display:flex;flex-wrap:wrap;gap:10px}.book-related a[data-v-37b0d821]{display:inline-flex;align-items:center;padding:9px 14px;border:1px solid var(--primary);background:var(--paper);font-family:var(--mono);font-size:var(--book-body);color:var(--primary);transition:background .18s,color .18s}.book-related a[data-v-37b0d821]:hover{background:var(--primary);color:var(--paper)}.book-related span[data-v-37b0d821]{display:none}.turn-enter-active[data-v-37b0d821],.turn-leave-active[data-v-37b0d821]{transition:opacity .2s ease,transform .2s ease}.turn-enter-from[data-v-37b0d821]{opacity:0;transform:translate(16px)}.turn-leave-to[data-v-37b0d821]{opacity:0;transform:translate(-16px)}@media(max-width:760px){.reference-book[data-v-37b0d821]{height:auto;min-height:0;overflow:visible}.book-header[data-v-37b0d821]{align-items:stretch;flex-direction:column}.book-search input[data-v-37b0d821]{flex:1;width:auto}.book-chapters[data-v-37b0d821]{display:flex;overflow-x:auto}.book-chapters a[data-v-37b0d821]{flex:0 0 170px}.book-command-nav[data-v-37b0d821]{grid-template-columns:1fr}.book-command-nav>header[data-v-37b0d821]{border-right:0;border-bottom:1px solid var(--border)}.book-spread[data-v-37b0d821]{grid-template-columns:1fr}.book-page[data-v-37b0d821]{padding:30px 24px}.book-page+.book-page[data-v-37b0d821]{border-top:1px solid var(--border)}.newspaper-title__main[data-v-37b0d821]{align-items:flex-start;flex-direction:column}.book-practice-grid[data-v-37b0d821],.book-notes-grid[data-v-37b0d821],.book-left-bottom[data-v-37b0d821]{grid-template-columns:1fr}.book-left-bottom>section+section[data-v-37b0d821]{padding-top:0;border-left:0}.book-related[data-v-37b0d821]{grid-template-columns:1fr}.book-footer-flex[data-v-37b0d821]{flex-direction:column}.book-footer-flex>section+section[data-v-37b0d821]{border-top:1px solid var(--border)}}@media(prefers-reduced-motion:reduce){.turn-enter-active[data-v-37b0d821],.turn-leave-active[data-v-37b0d821]{transition:none}}.roadmap[data-v-30c92281]{margin-top:10px;border-top:2px solid var(--ink);border-bottom:2px solid var(--ink)}.roadmap__track[data-v-30c92281]::-webkit-scrollbar{display:none}.roadmap__label[data-v-30c92281]{align-self:center;padding-right:28px;font-family:var(--serif-tc);font-weight:700;font-size:15px;white-space:nowrap}.roadmap__rail[data-v-30c92281]{display:grid;grid-template-columns:auto 34px minmax(0,1fr) 34px;align-items:stretch}.roadmap__arrow[data-v-30c92281]{border:0;background:transparent;color:var(--ink-faint);font-family:var(--mono);font-size:17px;cursor:pointer}.roadmap__arrow[data-v-30c92281]:hover{color:var(--primary)}.roadmap__track[data-v-30c92281]{display:flex;gap:0;overflow-x:auto;scroll-snap-type:x proximity;scroll-behavior:smooth}.roadmap__item[data-v-30c92281]{flex:0 0 216px;display:flex;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:10px 12px;border:0;border-right:1px solid var(--border);border-top:3px solid transparent;background:transparent;color:var(--ink);text-align:left;scroll-snap-align:center;cursor:pointer}.roadmap__item[data-v-30c92281]:hover{background:color-mix(in srgb,var(--secondary) 28%,transparent)}.roadmap__item.done[data-v-30c92281]{color:var(--primary)}.roadmap__item.current[data-v-30c92281]{background:color-mix(in srgb,var(--warning) 17%,transparent);color:var(--ink)}.roadmap__item.locked[data-v-30c92281]{color:var(--ink-faint);cursor:not-allowed;opacity:.48}.roadmap__mark[data-v-30c92281]{flex:none;font-family:var(--mono);font-size:11px}.roadmap__copy[data-v-30c92281]{min-width:0}.roadmap__copy b[data-v-30c92281]{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-family:var(--serif-tc);font-size:15px;font-weight:700}@media(max-width:900px){.roadmap__label[data-v-30c92281]{display:none}.roadmap__rail[data-v-30c92281]{grid-template-columns:34px minmax(0,1fr) 34px}.roadmap__item[data-v-30c92281]{flex-basis:190px}}@media(prefers-reduced-motion:reduce){.roadmap__track[data-v-30c92281]{scroll-behavior:auto}}.brief[data-v-a3c100d7]{margin-top:12px;display:flex;align-items:center;gap:18px 30px;flex-wrap:wrap;padding:6px 0 15px;border-bottom:1px solid var(--border)}.brief__badge[data-v-a3c100d7]{flex:none}.brief__headline[data-v-a3c100d7]{display:flex;align-items:baseline;gap:11px;flex:none;min-width:0}.brief__headline h2[data-v-a3c100d7]{margin:0;font-family:var(--display);font-size:clamp(24px,2.3vw,32px);line-height:1}.brief__zh[data-v-a3c100d7]{font-family:var(--serif-tc);font-size:16px;color:var(--ink-soft);white-space:nowrap}.brief__goal[data-v-a3c100d7]{flex:none;margin:0 0 0 auto;padding-left:16px;border-left:3px solid var(--primary)}.brief__goal dt[data-v-a3c100d7]{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint)}.brief__goal dd[data-v-a3c100d7]{margin:4px 0 0;font-family:var(--serif-tc);font-size:15px;color:var(--primary)}.brief__stats[data-v-a3c100d7]{display:flex;gap:24px;flex:none}.brief__stats dl[data-v-a3c100d7]{margin:0;padding-left:18px;border-left:1px solid var(--border)}.brief__stats dt[data-v-a3c100d7]{font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint)}.brief__stats dd[data-v-a3c100d7]{margin:4px 0 0;font-family:var(--mono);font-size:13px;letter-spacing:.01em}.brief__hint[data-v-a3c100d7]{position:relative;flex:none}.brief__hint-toggle[data-v-a3c100d7]{padding:8px 16px;border:1px solid var(--border);background:transparent;font-family:var(--serif-tc);font-size:12px;color:var(--ink-soft);cursor:pointer;transition:border-color .18s,color .18s}.brief__hint-toggle[data-v-a3c100d7]:hover,.brief__hint-toggle[aria-expanded=true][data-v-a3c100d7]{border-color:var(--primary);color:var(--primary)}.brief__hints[data-v-a3c100d7]{position:absolute;top:calc(100% + 8px);right:0;z-index:30;width:340px;max-width:78vw;margin:0;padding:15px 16px 15px 36px;list-style:decimal;background:var(--paper);border:1px solid var(--ink);box-shadow:var(--shadow);color:var(--ink-soft);font-family:var(--serif-tc);font-size:12.5px;line-height:1.65}.brief__hints li[data-v-a3c100d7]{margin:5px 0}.brief__hints li[data-v-a3c100d7]::marker{font-family:var(--mono);font-size:11px;color:var(--ink-faint)}.hint-enter-active[data-v-a3c100d7]{transition:opacity .2s ease,transform .2s ease}.hint-enter-from[data-v-a3c100d7]{opacity:0;transform:translateY(-4px)}@media(max-width:900px){.brief__goal[data-v-a3c100d7]{margin-left:0}.brief__hint[data-v-a3c100d7]{margin-left:auto}}@media(prefers-reduced-motion:reduce){.hint-enter-active[data-v-a3c100d7]{transition:none}}.achievement[data-v-6448ec20]{margin-top:24px;padding:28px;border:2px solid var(--success);background:color-mix(in srgb,var(--success) 5%,var(--paper-2))}p[data-v-6448ec20]{font-family:var(--mono);color:var(--success);letter-spacing:.12em;text-transform:uppercase;font-size:10px}p span[data-v-6448ec20]{margin-left:8px}h3[data-v-6448ec20]{font-family:var(--display);font-size:30px;margin:14px 0 2px}h4[data-v-6448ec20]{font-family:var(--serif-tc);margin:0 0 14px;font-size:17px}div[data-v-6448ec20]{color:var(--ink-soft);line-height:1.7;margin-bottom:20px}div span[data-v-6448ec20]{font-family:var(--serif-tc)}.viz-section[data-v-1d201593]{padding:14px 16px 18px;border:0;border-radius:0;background:transparent}header[data-v-1d201593]{font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase}header b[data-v-1d201593]{font-family:var(--serif-tc);font-weight:400}.workflow__lead[data-v-1d201593]{margin:8px 0 13px;font-family:var(--serif-tc);font-size:11px;color:var(--ink-faint)}.workflow__track[data-v-1d201593]{display:flex;flex-direction:column}.wf-zone[data-v-1d201593]{padding:11px 13px;border:1px solid var(--border);background:var(--paper-2);transition:border-color .25s var(--ease),background .25s var(--ease)}.wf-zone--filled[data-v-1d201593]{border-color:var(--primary);background:color-mix(in srgb,var(--primary) 6%,var(--paper-2))}.wf-zone__head[data-v-1d201593]{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}.wf-zone__name[data-v-1d201593]{font-family:var(--serif-tc);font-size:14px;font-weight:700}.wf-zone__hint[data-v-1d201593]{font-family:var(--serif-tc);font-size:10.5px;color:var(--ink-faint)}.wf-zone__files[data-v-1d201593]{display:flex;gap:6px;flex-wrap:wrap;margin-top:9px;min-height:0}.wf-file[data-v-1d201593]{padding:4px 9px;background:var(--paper);border:1px solid var(--primary);font-family:var(--mono);font-size:10px;color:var(--primary)}.wf-zone__empty[data-v-1d201593]{margin:8px 0 0;font-family:var(--serif-tc);font-size:10.5px;color:var(--ink-faint)}.wf-arrow[data-v-1d201593]{display:flex;align-items:center;justify-content:center;gap:9px;padding:7px 0}.wf-arrow__glyph[data-v-1d201593]{font-family:var(--mono);font-size:16px;line-height:1;color:var(--warning)}.wf-arrow__cmd[data-v-1d201593]{padding:3px 11px;border:1px solid var(--warning);background:color-mix(in srgb,var(--warning) 10%,transparent);font-family:var(--mono);font-size:11px;letter-spacing:.02em;color:var(--warning)}.file-enter-active[data-v-1d201593],.file-leave-active[data-v-1d201593],.file-move[data-v-1d201593]{transition:all .26s ease}.file-enter-from[data-v-1d201593],.file-leave-to[data-v-1d201593]{opacity:0;transform:translateY(-8px)}@media(prefers-reduced-motion:reduce){.file-enter-active[data-v-1d201593],.file-leave-active[data-v-1d201593],.file-move[data-v-1d201593]{transition:none}}.viz-section[data-v-7a56a100]{padding:16px;border:0;border-radius:0;background:transparent}header[data-v-7a56a100]{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase}header b[data-v-7a56a100]{font-family:var(--serif-tc);font-weight:400}.empty[data-v-7a56a100]{font-family:var(--serif-tc);color:var(--ink-faint);font-size:11px;line-height:1.7;margin:14px 0 0}svg[data-v-7a56a100]{width:100%;margin-top:12px;overflow:visible}path[data-v-7a56a100]{fill:none;stroke:var(--secondary);stroke-width:1.5}.graph__node[data-v-7a56a100]{transition:transform .28s ease}.graph__node circle[data-v-7a56a100]{fill:var(--primary);stroke:var(--paper-2);stroke-width:3}.graph__node text[data-v-7a56a100]{font-family:var(--mono);font-size:9px;fill:var(--ink-soft)}.graph__node .branch-label[data-v-7a56a100]{fill:var(--warning);font-weight:700}@media(prefers-reduced-motion:reduce){.graph__node[data-v-7a56a100]{transition:none}}.viz-section[data-v-15e86772]{padding:16px;border:0;border-radius:0;background:transparent}header[data-v-15e86772]{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase}header b[data-v-15e86772]{font-family:var(--serif-tc);font-weight:400}.empty[data-v-15e86772]{font-family:var(--serif-tc);color:var(--ink-faint);font-size:11px;margin:14px 0 0}ol[data-v-15e86772]{list-style:none;margin:12px 0 0;padding:0}li[data-v-15e86772]{display:grid;grid-template-columns:42px 1fr;gap:10px;padding:9px 0;border-top:1px solid var(--border)}time[data-v-15e86772],code[data-v-15e86772],small[data-v-15e86772]{font-family:var(--mono);font-size:9px;color:var(--ink-faint)}li b[data-v-15e86772]{display:block;font-family:var(--display);font-size:13px;margin-bottom:3px}code[data-v-15e86772]{margin-right:8px;color:var(--warning)}em[data-v-15e86772]{font-style:normal;color:var(--primary)}.commit-enter-active[data-v-15e86772]{transition:all .26s ease}.commit-enter-from[data-v-15e86772]{opacity:0;transform:translateY(-8px)}@media(prefers-reduced-motion:reduce){.commit-enter-active[data-v-15e86772]{transition:none}}.viz-tabs[data-v-43c0e48a]{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);border-radius:0;background:transparent;overflow:hidden}.viz-tabs__buttons[data-v-43c0e48a]{flex:none;display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--border)}.viz-tabs__buttons button[data-v-43c0e48a]{padding:11px 6px;border:0;border-right:1px solid var(--border);background:transparent;color:var(--ink-faint);font-family:var(--serif-tc);font-size:13px;cursor:pointer}.viz-tabs__buttons button[data-v-43c0e48a]:last-child{border-right:0}.viz-tabs__buttons button.active[data-v-43c0e48a]{color:var(--primary);background:transparent;box-shadow:inset 0 -3px var(--primary)}.viz-tabs__viewport[data-v-43c0e48a]{overflow:visible}.viz-tabs__viewport[data-v-43c0e48a] .viz-section{border:0;border-radius:0}.viz-enter-active[data-v-43c0e48a],.viz-leave-active[data-v-43c0e48a]{transition:opacity .22s ease,transform .22s ease}.viz-enter-from[data-v-43c0e48a]{opacity:0;transform:translateY(4px)}.viz-leave-to[data-v-43c0e48a]{opacity:0}@media(prefers-reduced-motion:reduce){.viz-enter-active[data-v-43c0e48a],.viz-leave-active[data-v-43c0e48a]{transition:none}}.visualization[data-v-9bd5cb8b]{display:flex;flex-direction:column;gap:10px}.visualization__title[data-v-9bd5cb8b]{flex:none;display:flex;justify-content:flex-start;align-items:baseline;padding-bottom:10px;border-bottom:2px solid var(--ink);font-family:var(--mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase}.visualization__title b[data-v-9bd5cb8b]{font-family:var(--serif-tc);font-size:14px;letter-spacing:.04em}@media(max-width:1080px){.visualization[data-v-9bd5cb8b]{height:auto}}.challenge-page[data-v-e7a92f6f]{display:flex;flex-direction:column;gap:16px;min-height:calc(100vh - 54px);padding:10px 0 72px}.challenge-head[data-v-e7a92f6f]{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;padding:8px 0 12px;border-top:3px double var(--ink);border-bottom:3px double var(--ink);flex:none}.challenge-head__intro[data-v-e7a92f6f]{min-width:0}.challenge-head h1[data-v-e7a92f6f]{margin:8px 0 0;font-family:Georgia,Times New Roman,serif;font-size:clamp(34px,3.2vw,46px);line-height:.98;letter-spacing:-.035em}.challenge-head p[data-v-e7a92f6f]:last-child{margin:8px 0 0;font-family:var(--serif-tc);font-size:14px;line-height:1.5;color:var(--ink-soft);max-width:56ch}.challenge-progress[data-v-e7a92f6f]{width:min(320px,38%);flex:none;padding-left:30px;border-left:1px solid var(--border)}.challenge-progress>div[data-v-e7a92f6f]:first-child{display:flex;justify-content:space-between;margin-bottom:8px;font-family:var(--mono);font-size:14px}.challenge-progress b[data-v-e7a92f6f]{color:var(--warning);font-weight:400}.challenge-progress small[data-v-e7a92f6f]{display:block;margin-top:7px;font-family:var(--mono);color:var(--ink-faint);font-size:14px;letter-spacing:.08em}.challenge-layout[data-v-e7a92f6f]{flex:none;margin-top:12px;display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,460px);gap:32px;align-items:start}.challenge-main[data-v-e7a92f6f]{min-width:0;display:flex;flex-direction:column;gap:10px}.terminal-frame[data-v-e7a92f6f]{flex:none;height:clamp(360px,52vh,500px);display:flex;flex-direction:column;gap:10px}.terminal-frame__title[data-v-e7a92f6f]{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:0 2px 10px;border-bottom:2px solid var(--ink);flex:none}.terminal-frame__title b[data-v-e7a92f6f]{flex:none;font-family:var(--serif-tc);font-size:14px;font-weight:700;letter-spacing:.04em}.terminal-frame__title span[data-v-e7a92f6f]{font-family:var(--serif-tc);font-size:13px;color:var(--ink-soft);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.terminal-frame[data-v-e7a92f6f] .terminal{flex:1 1 auto;min-height:0}.terminal-frame[data-v-e7a92f6f] .terminal__body{flex:1 1 auto;min-height:90px;max-height:none}.challenge-complete[data-v-e7a92f6f]{flex:none;margin:0;padding:16px 22px 18px;border:2px solid var(--success);display:flex;flex-direction:column;gap:11px}.challenge-complete.is-error[data-v-e7a92f6f]{border-color:var(--danger)}.challenge-complete.is-info[data-v-e7a92f6f]{border-color:var(--primary)}.challenge-complete p[data-v-e7a92f6f]{margin:0;font-family:var(--mono);color:var(--success);font-size:10px;letter-spacing:.12em;text-transform:uppercase}.challenge-complete.is-error p[data-v-e7a92f6f],.challenge-complete.is-error .challenge-complete__desk dt[data-v-e7a92f6f]{color:var(--danger)}.challenge-complete.is-info p[data-v-e7a92f6f],.challenge-complete.is-info .challenge-complete__desk dt[data-v-e7a92f6f]{color:var(--primary)}.challenge-complete h3[data-v-e7a92f6f]{margin:0;font-family:var(--display);font-size:22px}.challenge-complete__desk[data-v-e7a92f6f]{margin:2px 0 3px}.challenge-complete__desk div[data-v-e7a92f6f]{padding:4px 0}.challenge-complete__desk dt[data-v-e7a92f6f]{display:inline;font-family:var(--mono);font-size:9px;letter-spacing:.06em;text-transform:uppercase;color:var(--success)}.challenge-complete__desk dt[data-v-e7a92f6f]:after{content:"　"}.challenge-complete__desk dd[data-v-e7a92f6f]{display:inline;margin:0;font-family:var(--serif-tc);font-size:13px;line-height:1.7;color:var(--ink-soft)}.challenge-complete__next[data-v-e7a92f6f]{align-self:flex-end}@media(max-width:1080px){.challenge-page[data-v-e7a92f6f]{min-height:0;padding-bottom:48px}.challenge-layout[data-v-e7a92f6f]{grid-template-columns:1fr;height:auto}.challenge-head[data-v-e7a92f6f]{align-items:flex-start;flex-direction:column;gap:14px}.challenge-progress[data-v-e7a92f6f]{width:100%;padding-left:0;border-left:0}.terminal-frame[data-v-e7a92f6f]{height:340px}}@media(max-width:720px){.challenge-head h1[data-v-e7a92f6f]{font-size:29px}}@media(prefers-reduced-motion:reduce){[data-v-e7a92f6f],[data-v-e7a92f6f]:before,[data-v-e7a92f6f]:after{transition-duration:0ms!important;animation-duration:0ms!important}}.practice[data-v-a8948322]{padding-top:56px;min-height:70vh}.pr-head[data-v-a8948322]{text-align:center;margin-bottom:56px}.pr-title[data-v-a8948322]{font-family:var(--display);font-weight:900;font-size:clamp(38px,6vw,68px);margin:16px 0 8px;letter-spacing:-.02em}.pr-sub[data-v-a8948322]{color:var(--ink-soft);max-width:48ch;margin:0 auto;font-size:16px}.game-cards[data-v-a8948322]{display:grid;grid-template-columns:1fr 1fr;gap:28px;max-width:900px;margin:0 auto}.game-card[data-v-a8948322]{text-align:left;background:var(--paper-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px;cursor:pointer;transition:transform .25s var(--ease),box-shadow .3s var(--ease),border-color .2s;display:flex;flex-direction:column}.game-card[data-v-a8948322]:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--primary)}.game-card__kicker[data-v-a8948322]{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-faint)}.game-card__mark[data-v-a8948322]{font-size:30px;color:var(--primary);margin:20px 0 12px}.game-card h2[data-v-a8948322]{font-family:var(--display);font-size:30px;margin:0}.game-card>.u-serif[data-v-a8948322]{color:var(--ink-soft);margin:2px 0 0;font-size:15px}.game-card__desc[data-v-a8948322]{color:var(--ink-soft);font-size:14px;line-height:1.7;margin:18px 0 24px;flex:1}.game-card__meta[data-v-a8948322]{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.game-card__meta .u-mono[data-v-a8948322]{font-size:12px;color:var(--ink-faint)}.game-card__cta[data-v-a8948322]{font-family:var(--mono);font-size:13px;letter-spacing:.05em;color:var(--primary)}.game-card--dark[data-v-a8948322]{background:var(--code-bg);border-color:var(--code-line)}.game-card--dark .game-card__kicker[data-v-a8948322]{color:#85817a}.game-card--dark h2[data-v-a8948322]{color:var(--code-fg)}.game-card--dark>.u-serif[data-v-a8948322],.game-card--dark .game-card__desc[data-v-a8948322]{color:#b3aea3}.game-card--dark .game-card__mark[data-v-a8948322],.game-card--dark .game-card__cta[data-v-a8948322]{color:#9ec7ae}.pr-tip[data-v-a8948322]{text-align:center;margin-top:48px;color:var(--ink-soft);font-size:14px}.pr-tip code[data-v-a8948322]{font-family:var(--mono);color:var(--primary);background:var(--secondary-2);padding:2px 7px;border-radius:4px}.quiz[data-v-a8948322]{max-width:760px;margin:0 auto}.quiz-top[data-v-a8948322]{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;font-size:12px}.quiz-quit[data-v-a8948322]{background:none;border:none;color:var(--ink-faint);cursor:pointer;letter-spacing:.05em}.quiz-quit[data-v-a8948322]:hover{color:var(--primary)}.quiz-count[data-v-a8948322]{color:var(--ink-soft);letter-spacing:.08em}.quiz-score[data-v-a8948322]{color:var(--warning);letter-spacing:.1em}.quiz-card[data-v-a8948322]{background:var(--paper-2);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px}.quiz-scenario[data-v-a8948322]{font-family:var(--display);font-size:clamp(22px,3.2vw,30px);line-height:1.3;margin:0}.quiz-scenario-zh[data-v-a8948322]{color:var(--ink-soft);font-size:16px;margin:10px 0 0}.quiz-hint[data-v-a8948322]{margin-top:22px}.quiz-hint__toggle[data-v-a8948322]{padding:8px 14px;font-size:12px}.quiz-hint__text[data-v-a8948322]{margin:12px 0 0;padding:14px 16px;border-left:3px solid var(--warning);background:color-mix(in srgb,var(--warning) 7%,transparent);color:var(--ink-soft);font-size:14px;line-height:1.7}.quiz-hint__text .u-mono[data-v-a8948322]{color:var(--warning);font-size:11px;letter-spacing:.12em}.feedback[data-v-a8948322]{margin-top:28px;padding:24px;border-radius:var(--radius);border:1px solid var(--border)}.feedback--ok[data-v-a8948322]{border-color:color-mix(in srgb,var(--success) 45%,transparent);background:color-mix(in srgb,var(--success) 6%,transparent)}.feedback--no[data-v-a8948322]{border-color:color-mix(in srgb,var(--danger) 45%,transparent);background:color-mix(in srgb,var(--danger) 5%,transparent)}.feedback__head[data-v-a8948322]{display:flex;gap:14px;align-items:center;margin-bottom:20px}.feedback__badge[data-v-a8948322]{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-size:15px;flex-shrink:0;color:var(--paper-2)}.feedback--ok .feedback__badge[data-v-a8948322]{background:var(--success)}.feedback--no .feedback__badge[data-v-a8948322]{background:var(--danger)}.feedback__head b[data-v-a8948322]{font-family:var(--display);font-size:18px}.feedback__head small[data-v-a8948322]{display:block;color:var(--ink-soft);font-size:13px}.feedback__label[data-v-a8948322]{font-size:10px;letter-spacing:.15em;color:var(--ink-faint);display:block;margin-bottom:6px}.feedback__answer[data-v-a8948322]{margin-bottom:18px}.feedback__answer code[data-v-a8948322]{font-family:var(--mono);font-size:15px;color:var(--primary);background:var(--paper);border:1px solid var(--border);padding:8px 14px;border-radius:6px;display:inline-block}.feedback__answer--given code[data-v-a8948322]{color:var(--danger)}.feedback__note p[data-v-a8948322]{margin:0 0 4px;color:var(--ink-soft);font-size:14px;line-height:1.7}.feedback .btn[data-v-a8948322]{margin-top:20px}.result[data-v-a8948322]{max-width:640px;margin:0 auto;text-align:center}.result-score[data-v-a8948322]{display:flex;align-items:baseline;justify-content:center;gap:8px;margin:20px 0 8px}.result-num[data-v-a8948322]{font-family:var(--display);font-weight:900;font-size:96px;line-height:1;color:var(--primary)}.result-den[data-v-a8948322]{font-family:var(--display);font-size:32px;color:var(--ink-faint)}.result-grade[data-v-a8948322]{font-family:var(--display);font-size:32px;margin:8px 0 2px}.result-grade-zh[data-v-a8948322]{color:var(--ink-soft);margin:0}.result-actions[data-v-a8948322]{display:flex;gap:16px;justify-content:center;margin:36px 0 56px;flex-wrap:wrap}.result-perfect[data-v-a8948322]{color:var(--ink-soft)}.review[data-v-a8948322]{text-align:left;border-top:3px double var(--ink);padding-top:32px}.review-row[data-v-a8948322]{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;padding:18px 0;border-bottom:1px solid var(--border)}.review-q[data-v-a8948322]{font-size:15px;margin:0 0 10px;color:var(--ink)}.review-answers[data-v-a8948322]{display:flex;flex-direction:column;gap:4px;font-size:13px}.review-given code[data-v-a8948322]{color:var(--danger);font-family:var(--mono)}.review-correct code[data-v-a8948322]{color:var(--success);font-family:var(--mono)}.review-link[data-v-a8948322]{font-family:var(--mono);font-size:12px;color:var(--primary);white-space:nowrap}.review-link[data-v-a8948322]:hover{text-decoration:underline}.practice[data-v-a8948322]{--practice-body: 16px;padding-top:30px;padding-bottom:72px}.pr-head[data-v-a8948322]{text-align:left;margin-bottom:32px;padding-bottom:24px;border-bottom:3px double var(--ink)}.practice-kicker[data-v-a8948322]{display:flex;justify-content:space-between;align-items:baseline;gap:20px;font-family:var(--mono);font-size:14px;letter-spacing:.14em;text-transform:uppercase}.practice-kicker b[data-v-a8948322]{font-family:var(--serif-tc);font-size:17px;letter-spacing:.04em}.pr-title[data-v-a8948322]{margin:22px 0 0;font-family:Georgia,Times New Roman,serif;font-size:clamp(42px,5vw,64px);font-weight:700;line-height:1}.pr-title-zh[data-v-a8948322]{margin:10px 0 0;font-family:var(--serif-tc);font-size:25px;color:var(--primary)}.pr-sub[data-v-a8948322]{max-width:64ch;margin:18px 0 0;font-size:var(--practice-body);line-height:1.8}.practice-modes[data-v-a8948322]{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.practice-mode[data-v-a8948322]{min-width:0;padding:30px 34px 26px;border:0;border-right:1px solid var(--border);background:transparent;color:var(--ink);text-align:left;cursor:pointer;transition:background .18s}.practice-mode[data-v-a8948322]:last-child{border-right:0}.practice-mode[data-v-a8948322]:hover{background:var(--secondary-2)}.practice-mode[data-v-a8948322]:focus-visible{outline-offset:-4px}.practice-mode .game-card__kicker[data-v-a8948322]{display:block;font-family:var(--mono);font-size:14px;letter-spacing:.12em;color:var(--primary);text-transform:uppercase}.practice-mode h2[data-v-a8948322]{margin:24px 0 0;font-family:var(--display);font-size:38px}.mode-en[data-v-a8948322]{margin:4px 0 0;font-family:var(--mono);font-size:16px;color:var(--ink-faint)}.practice-mode .game-card__desc[data-v-a8948322]{max-width:45ch;margin:22px 0;font-family:var(--serif-tc);font-size:var(--practice-body);line-height:1.75;color:var(--ink-soft)}.mode-terminal[data-v-a8948322]{display:flex;gap:12px;margin:2px 0 20px;padding:13px 16px;background:var(--terminal-bg);color:var(--success);font-family:var(--mono);font-size:var(--practice-body)}.mode-terminal code[data-v-a8948322]{color:var(--code-fg)}.practice-mode .game-card__meta[data-v-a8948322]{margin:0;padding:14px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);font-family:var(--serif-tc);font-size:var(--practice-body)}.practice-mode .game-card__meta b[data-v-a8948322]{font-family:var(--mono);color:var(--primary)}.practice-mode .game-card__cta[data-v-a8948322]{display:inline-flex;gap:12px;align-items:center;margin-top:22px;font-family:var(--serif-tc);font-size:18px;color:var(--primary)}.practice-mode .game-card__cta b[data-v-a8948322]{font-family:var(--mono)}.pr-tip[data-v-a8948322]{margin-top:28px;padding:16px 0;border-bottom:3px double var(--ink);font-size:var(--practice-body);text-align:left}.pr-tip code[data-v-a8948322]{border-radius:0}.quiz[data-v-a8948322]{max-width:900px}.quiz-top[data-v-a8948322]{margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--ink);font-size:14px}.quiz-quit[data-v-a8948322],.quiz-count[data-v-a8948322],.quiz-score[data-v-a8948322]{font-size:14px}.quiz-sheet[data-v-a8948322]{padding:32px 38px 36px;border:1px solid var(--border);border-top:4px double var(--ink);border-radius:0;background:var(--paper-2)}.quiz-scenario[data-v-a8948322]{max-width:28ch;font-family:Georgia,Times New Roman,serif;font-size:clamp(27px,3vw,38px);line-height:1.25}.quiz-scenario-zh[data-v-a8948322]{max-width:34ch;margin-top:0;font-family:var(--serif-tc);font-size:clamp(24px,2.8vw,34px);line-height:1.5;color:var(--ink)}.quiz-hint__toggle[data-v-a8948322]{padding:10px 16px;border-radius:0;font-size:14px}.quiz-hint__text[data-v-a8948322]{padding:14px 18px;background:transparent;font-size:var(--practice-body)}.quiz-hint__text .u-mono[data-v-a8948322]{font-size:14px}.quiz-hint__more[data-v-a8948322]{display:block;margin-top:12px;padding:7px 0;border:0;border-bottom:1px solid var(--primary);background:transparent;font-family:var(--serif-tc);font-size:14px;color:var(--primary);cursor:pointer}.quiz-hint__syntax[data-v-a8948322]{display:block;width:fit-content;margin-top:12px;padding:9px 13px;border:1px solid var(--border);background:var(--paper);font-family:var(--mono);font-size:var(--practice-body);color:var(--primary)}.quiz-sheet .choice[data-v-a8948322]{border-top:1px solid var(--border)}.quiz-sheet .choice button[data-v-a8948322]{border:0;border-bottom:1px solid var(--border);border-radius:0;background:transparent;font-size:var(--practice-body)}.quiz-sheet .choice button[data-v-a8948322]:hover:not(:disabled){background:var(--secondary-2)}.quiz-sheet .choice .key[data-v-a8948322],.quiz-terminal .terminal[data-v-a8948322]{border-radius:0}.editor-feedback[data-v-a8948322]{padding:22px 0 0;border:0;border-top:3px double var(--ink);border-radius:0;background:transparent}.feedback__head b[data-v-a8948322]{font-family:var(--display);font-size:22px}.feedback__head small[data-v-a8948322],.feedback__label[data-v-a8948322],.feedback__note p[data-v-a8948322]{font-size:14px}.feedback__answer code[data-v-a8948322]{border-radius:0;font-size:var(--practice-body)}.feedback__note p[data-v-a8948322]{font-size:var(--practice-body)}.result[data-v-a8948322]{max-width:760px}.result .eyebrow[data-v-a8948322]{padding-bottom:14px;border-bottom:3px double var(--ink);font-size:14px}.result-grade-zh[data-v-a8948322],.result-perfect[data-v-a8948322],.review-q[data-v-a8948322]{font-size:var(--practice-body)}.review[data-v-a8948322]{padding-top:24px}.review-answers[data-v-a8948322],.review-link[data-v-a8948322]{font-size:14px}@media(max-width:720px){.game-cards[data-v-a8948322],.practice-modes[data-v-a8948322]{grid-template-columns:1fr}.practice-mode[data-v-a8948322]{border-right:0;border-bottom:1px solid var(--border)}.practice-mode[data-v-a8948322]:last-child{border-bottom:0}.quiz-card[data-v-a8948322]{padding:28px 22px}.review-row[data-v-a8948322]{flex-direction:column;gap:10px}}.library-page[data-v-f4d06fd9]{padding:20px 0 56px;min-height:70vh}.library-masthead[data-v-f4d06fd9]{display:grid;grid-template-columns:1.4fr .6fr;align-items:end;gap:36px;padding:10px 0 14px;border-top:4px double var(--ink);border-bottom:4px double var(--ink)}.library-kicker[data-v-f4d06fd9]{color:var(--primary);font-family:var(--mono);font-size:14px;letter-spacing:.18em;text-transform:uppercase}.library-masthead h1[data-v-f4d06fd9]{margin:5px 0 0;font-family:var(--display);font-size:clamp(32px,3vw,44px);line-height:1}.library-masthead h1 span[data-v-f4d06fd9]{display:inline-block;margin-left:16px;font-family:var(--serif);font-size:.42em;font-weight:500}.library-summary[data-v-f4d06fd9]{max-width:430px;color:var(--ink-soft);font-family:var(--serif);font-size:17px;line-height:1.8}.clipping-section[data-v-f4d06fd9]{margin-top:20px;border-bottom:3px double var(--ink)}.clipping-section>header[data-v-f4d06fd9]{display:flex;align-items:baseline;gap:14px;padding-bottom:12px;border-bottom:1px solid var(--ink)}.clipping-section>header span[data-v-f4d06fd9]{color:var(--accent);font:16px var(--mono)}.clipping-section>header h2[data-v-f4d06fd9]{font-family:var(--display);font-size:24px}.clipping-section>header p[data-v-f4d06fd9]{color:var(--ink-soft);font-family:var(--serif);font-size:16px}.clipping-row[data-v-f4d06fd9]{display:grid;grid-template-columns:170px 1fr auto;gap:24px;align-items:center;padding:14px 0;border-bottom:1px solid var(--border)}.clipping-row[data-v-f4d06fd9]:last-child{border-bottom:0}.clipping-row__number[data-v-f4d06fd9]{color:var(--primary);font:700 20px var(--mono)}.clipping-row__copy h3[data-v-f4d06fd9]{margin-bottom:5px;font-family:var(--serif);font-size:20px}.clipping-row__copy p[data-v-f4d06fd9]{display:-webkit-box;overflow:hidden;color:var(--ink-soft);font-family:var(--serif);font-size:16px;line-height:1.7;-webkit-line-clamp:2;-webkit-box-orient:vertical}.clipping-row__actions[data-v-f4d06fd9]{display:flex;align-items:center;gap:18px}.clipping-row__actions a[data-v-f4d06fd9],.clipping-row__actions button[data-v-f4d06fd9]{white-space:nowrap;font-size:15px}.clipping-row__actions a[data-v-f4d06fd9]{color:var(--primary);font-weight:700}.clipping-row__actions button[data-v-f4d06fd9]{padding:8px 0;border:0;border-bottom:1px solid var(--border);background:none;color:var(--ink-soft);cursor:pointer}.library-empty[data-v-f4d06fd9]{max-width:720px;margin:80px auto 0;padding:44px;border:1px solid var(--border);border-top:4px double var(--ink);background:var(--paper-2);text-align:center}.library-empty h2[data-v-f4d06fd9]{margin:14px 0;font-family:var(--display);font-size:38px}.library-empty>p[data-v-f4d06fd9]:not(.library-kicker){margin-bottom:28px;color:var(--ink-soft);font-family:var(--serif);font-size:17px}@media(max-width:800px){.library-masthead[data-v-f4d06fd9]{grid-template-columns:1fr;gap:18px}.clipping-row[data-v-f4d06fd9]{grid-template-columns:1fr;gap:12px}.clipping-row__actions[data-v-f4d06fd9]{justify-content:space-between}}.library-page[data-v-9f42c197]{padding:20px 0 56px;min-height:70vh}.library-masthead[data-v-9f42c197]{display:flex;justify-content:space-between;align-items:end;gap:32px;padding:10px 0 14px;border-top:4px double var(--ink);border-bottom:4px double var(--ink)}.library-kicker[data-v-9f42c197]{color:var(--primary);font-family:var(--mono);font-size:14px;letter-spacing:.18em;text-transform:uppercase}.library-masthead h1[data-v-9f42c197]{margin:5px 0 0;font-family:var(--display);font-size:clamp(32px,3vw,44px);line-height:1}.library-masthead h1 span[data-v-9f42c197]{display:inline-block;margin-left:16px;font-family:var(--serif);font-size:.42em;font-weight:500}.journal-actions[data-v-9f42c197]{display:flex;align-items:center;gap:20px}.journal-actions>button[data-v-9f42c197]{border:0;border-bottom:1px solid var(--border);background:none;color:var(--ink-soft);font-size:15px;cursor:pointer}.journal-list[data-v-9f42c197]{border-bottom:4px double var(--ink)}.journal-entry[data-v-9f42c197]{display:grid;grid-template-columns:130px 1fr 145px;gap:24px;padding:18px 0;border-bottom:1px solid var(--ink)}.journal-entry aside[data-v-9f42c197]{display:flex;flex-direction:column;gap:7px;font-family:var(--mono)}.journal-entry aside span[data-v-9f42c197]{color:var(--accent);font-size:14px;letter-spacing:.12em}.journal-entry aside b[data-v-9f42c197]{font-size:16px}.journal-entry aside small[data-v-9f42c197]{color:var(--ink-faint);font-size:14px}.journal-command[data-v-9f42c197]{color:var(--primary);font:700 17px var(--mono)}.journal-entry h2[data-v-9f42c197]{margin:8px 0 20px;font-family:var(--serif);font-size:25px;line-height:1.5}.answer-comparison[data-v-9f42c197]{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.answer-comparison>div[data-v-9f42c197]{display:flex;flex-direction:column;gap:8px;padding:16px 20px}.answer-comparison>div+div[data-v-9f42c197]{border-left:1px solid var(--border)}.answer-comparison span[data-v-9f42c197],.journal-explanation span[data-v-9f42c197]{color:var(--ink-faint);font-size:14px}.answer-comparison code[data-v-9f42c197]{font-size:16px}.journal-explanation[data-v-9f42c197]{padding-top:16px}.journal-explanation p[data-v-9f42c197]{margin-top:7px;color:var(--ink-soft);font-family:var(--serif);font-size:16px;line-height:1.7}.journal-entry footer[data-v-9f42c197]{display:flex;flex-direction:column;align-items:flex-end;gap:16px}.journal-entry footer a[data-v-9f42c197]{color:var(--primary);font-size:15px;font-weight:700}.journal-entry footer button[data-v-9f42c197]{border:0;border-bottom:1px solid var(--border);background:none;color:var(--ink-soft);font-size:14px;cursor:pointer}.library-empty[data-v-9f42c197]{max-width:720px;margin:80px auto 0;padding:44px;border:1px solid var(--border);border-top:4px double var(--ink);background:var(--paper-2);text-align:center}.library-empty h2[data-v-9f42c197]{margin:14px 0;font-family:var(--display);font-size:38px}.library-empty>p[data-v-9f42c197]:not(.library-kicker){margin-bottom:28px;color:var(--ink-soft);font-family:var(--serif);font-size:17px}@media(max-width:800px){.library-masthead[data-v-9f42c197]{align-items:flex-start;flex-direction:column}.journal-entry[data-v-9f42c197]{grid-template-columns:1fr;gap:18px}.journal-entry footer[data-v-9f42c197]{align-items:flex-start;flex-direction:row;justify-content:space-between}.answer-comparison[data-v-9f42c197]{grid-template-columns:1fr}.answer-comparison>div+div[data-v-9f42c197]{border-top:1px solid var(--border);border-left:0}}:root{--paper: #F8F5EE;--paper-2: #FFFDF7;--ink: #1F2937;--ink-soft: #55524A;--ink-faint: #8A8578;--primary: #315C46;--primary-ink: #234233;--secondary: #C6B79C;--secondary-2: #E7DECB;--border: #DDD5C5;--border-soft: #EAE3D5;--success: #3C8D5A;--warning: #E9A23B;--danger: #C65A5A;--code-bg: #2B2A26;--code-fg: #EDE7D8;--code-line: #3A3934;--terminal-bg: #22211D;--display: "Playfair Display", Georgia, "Times New Roman", serif;--serif-tc: "Noto Serif TC", "Songti TC", serif;--body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;--s1: 4px;--s2: 8px;--s3: 12px;--s4: 16px;--s5: 24px;--s6: 32px;--s7: 48px;--s8: 64px;--s9: 96px;--s10: 128px;--maxw: 1280px;--gutter: 24px;--radius: 6px;--radius-lg: 12px;--hairline: 1px solid var(--border);--rule: 1px solid var(--ink);--shadow-sm: 0 1px 2px rgba(31,41,55,.05);--shadow: 0 12px 40px -18px rgba(35,66,51,.28);--ease: cubic-bezier(.22,.61,.36,1);color-scheme:light}:root[data-theme=dark]{--paper: #161917;--paper-2: #1E221F;--ink: #ECE7DA;--ink-soft: #B6B1A3;--ink-faint: #7E7A6E;--primary: #86B79A;--primary-ink: #A7CBB6;--secondary: #C6B79C;--secondary-2: #33352E;--border: #2F332E;--border-soft: #262A26;--success: #57B278;--warning: #E9A23B;--danger: #DB7A7A;--code-bg: #101210;--code-fg: #DAD5C6;--code-line: #24271F;--terminal-bg: #0E100E;--shadow: 0 18px 50px -20px rgba(0,0,0,.6);color-scheme:dark}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;transition:background .4s var(--ease),color .4s var(--ease)}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font-family:inherit;cursor:pointer}::selection{background:var(--primary);color:var(--paper-2)}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:0;opacity:.5;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.028'/%3E%3C/svg%3E")}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);position:relative;z-index:1}.grid{display:grid;gap:var(--s5)}.rule{border:0;border-top:var(--rule);margin:0}.rule-thin{border:0;border-top:var(--hairline);margin:0}.rule-double{border:0;border-top:3px double var(--ink);margin:0}.bi{display:inline-flex;flex-direction:column;line-height:1.15}.bi .en{font-family:var(--display)}.bi .zh{font-family:var(--serif-tc);color:var(--ink-soft)}.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--primary);display:inline-flex;align-items:center;gap:var(--s2)}.eyebrow:before{content:"";width:22px;height:1px;background:var(--primary);display:inline-block}.masthead{border-bottom:3px double var(--ink);background:var(--paper);position:relative;z-index:5}.masthead__meta{display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);padding:var(--s2) 0;border-bottom:var(--hairline)}.masthead__meta .sep{color:var(--ink-faint);margin:0 var(--s3)}.masthead__title{text-align:center;padding:var(--s5) 0 var(--s3)}.masthead__title h1{font-family:var(--display);font-weight:900;font-size:clamp(38px,7vw,82px);margin:0;letter-spacing:-.02em;line-height:.95}.masthead__title .zh{font-family:var(--serif-tc);font-size:clamp(13px,2vw,17px);color:var(--ink-soft);letter-spacing:.3em;margin-top:var(--s3)}.topnav{display:flex;justify-content:center;gap:var(--s6);padding:var(--s3) 0;border-top:var(--hairline);position:relative}.topnav a{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft);padding-bottom:2px;position:relative;transition:color .2s}.topnav a:hover{color:var(--ink)}.topnav a.active{color:var(--primary)}.topnav a.active:after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--primary)}.topnav__tools{position:absolute;right:var(--gutter);top:50%;transform:translateY(-50%);display:flex;gap:var(--s2)}.subnav{position:sticky;top:0;z-index:40;background:var(--paper);border-bottom:var(--hairline);-webkit-backdrop-filter:saturate(1.1);backdrop-filter:saturate(1.1)}.subnav__inner{display:flex;align-items:center;justify-content:space-between;padding:var(--s3) 0}.subnav__brand{display:flex;align-items:center}.subnav__links{display:flex;gap:var(--s5);align-items:center}.subnav__links a{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft)}.subnav__links a.active,.subnav__links a:hover{color:var(--primary)}.btn{--bg: var(--primary);--fg: var(--paper-2);display:inline-flex;align-items:center;justify-content:center;gap:var(--s2);background:var(--bg);color:var(--fg);border:1px solid var(--bg);border-radius:var(--radius);padding:12px 22px;font-family:var(--mono);font-size:13px;letter-spacing:.08em;text-transform:uppercase;position:relative;overflow:hidden;transition:transform .18s var(--ease),box-shadow .25s var(--ease),background .2s}.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.btn:active{transform:translateY(0)}.btn--ghost{--bg: transparent;--fg: var(--ink);border-color:var(--border)}.btn--ghost:hover{border-color:var(--primary);color:var(--primary)}.btn--lg{padding:16px 30px;font-size:14px}.btn .zh{font-family:var(--serif-tc);text-transform:none;letter-spacing:normal;opacity:.8;margin-left:2px}.ripple{position:absolute;border-radius:50%;transform:scale(0);background:#ffffff59;pointer-events:none;animation:ripple .6s var(--ease)}@keyframes ripple{to{transform:scale(3);opacity:0}}.icon-btn{width:38px;height:38px;border-radius:var(--radius);border:1px solid var(--border);background:transparent;color:var(--ink-soft);display:grid;place-items:center;transition:all .2s;font-size:16px}.icon-btn:hover{border-color:var(--primary);color:var(--primary)}.card{background:var(--paper-2);border:var(--hairline);border-radius:var(--radius-lg);padding:var(--s5);transition:transform .25s var(--ease),box-shadow .3s var(--ease),border-color .2s}.card--hover:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--secondary)}.card__kicker{font-family:var(--mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:var(--s3);display:flex;justify-content:space-between}.badge{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;padding:4px 10px;border-radius:100px;border:1px solid var(--border);color:var(--ink-soft)}.badge--success{color:var(--success);border-color:color-mix(in srgb,var(--success) 40%,transparent);background:color-mix(in srgb,var(--success) 8%,transparent)}.badge--warn{color:var(--warning);border-color:color-mix(in srgb,var(--warning) 40%,transparent);background:color-mix(in srgb,var(--warning) 10%,transparent)}.badge--danger{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 40%,transparent);background:color-mix(in srgb,var(--danger) 8%,transparent)}.badge--solid{background:var(--primary);color:var(--paper-2);border-color:var(--primary)}.dot{width:6px;height:6px;border-radius:50%;background:currentColor}code,.mono{font-family:var(--mono)}.codeblock{background:var(--code-bg);color:var(--code-fg);border-radius:var(--radius);font-family:var(--mono);font-size:13.5px;line-height:1.7;overflow-x:auto;border:1px solid var(--code-line)}.codeblock__bar{display:flex;align-items:center;gap:6px;padding:10px 14px;border-bottom:1px solid var(--code-line)}.codeblock__bar .d{width:10px;height:10px;border-radius:50%;background:#4a4842}.codeblock__bar .label{margin-left:auto;font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:#85817a}.codeblock pre{margin:0;padding:16px 18px}.tok-cmd{color:#9ec7ae}.tok-flag{color:#e0b871}.tok-str{color:#d6a4a4}.tok-comment{color:#6f6b62}.tok-path{color:#a9c7e0}.terminal{background:var(--terminal-bg);border:1px solid var(--code-line);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow)}.terminal__bar{display:flex;align-items:center;gap:7px;padding:12px 16px;border-bottom:1px solid var(--code-line);background:#00000026}.terminal__bar .d{width:11px;height:11px;border-radius:50%}.terminal__bar .d.r{background:#e9645f}.terminal__bar .d.y{background:#e9c15f}.terminal__bar .d.g{background:#6bc17a}.terminal__bar .title{margin-left:auto;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#7d7a72}.terminal__body{flex:1;padding:16px 18px;font-family:var(--mono);font-size:13.5px;line-height:1.7;color:var(--code-fg);overflow-y:auto;min-height:260px;max-height:380px}.term-line{white-space:pre-wrap;word-break:break-word}.term-prompt{color:#7fb394}.term-branch{color:#e0b871}.term-cmd-echo{color:#ede7d8}.term-ok{color:#7ecb93}.term-err{color:#e08f8f}.term-dim{color:#7d7a72}.term-flag{color:#e0b871}.terminal__input{display:flex;align-items:center;padding:12px 18px;border-top:1px solid var(--code-line);font-family:var(--mono);font-size:13.5px;background:#0000001f}.terminal__input .p{color:#7fb394;margin-right:8px;white-space:nowrap}.terminal__input input{flex:1;background:none;border:0;color:var(--code-fg);font-family:var(--mono);font-size:13.5px}.terminal__input input:focus{outline:none}.term-cursor{width:8px;height:16px;background:#7fb394;animation:blink 1.1s step-end infinite}@keyframes blink{50%{opacity:0}}.mission-hd{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--s4)}.status-list{display:flex;flex-direction:column;gap:var(--s2)}.status-row{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border:var(--hairline);border-radius:var(--radius);font-family:var(--mono);font-size:12.5px}.status-row.is-done{border-color:color-mix(in srgb,var(--success) 45%,transparent);color:var(--success)}.status-row .mk{width:16px;height:16px;border-radius:50%;border:1.5px solid var(--border);display:grid;place-items:center;font-size:10px}.status-row.is-done .mk{border-color:var(--success);background:var(--success);color:var(--paper-2)}.branch-tree{font-family:var(--mono);font-size:12.5px;line-height:2}.branch-tree .node{display:inline-flex;align-items:center;gap:8px}.branch-tree .dotc{width:9px;height:9px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 20%,transparent)}.branch-tree .stem{color:var(--secondary)}.mission-map{display:flex;flex-direction:column;gap:2px}.mission-node{display:flex;align-items:center;gap:var(--s3);padding:var(--s3);border-radius:var(--radius);transition:background .2s}.mission-node:hover{background:var(--secondary-2)}.mission-node .idx{width:30px;height:30px;border-radius:50%;border:var(--hairline);display:grid;place-items:center;font-family:var(--mono);font-size:12px;flex-shrink:0}.mission-node.done .idx{background:var(--success);color:var(--paper-2);border-color:var(--success)}.mission-node.current .idx{background:var(--primary);color:var(--paper-2);border-color:var(--primary)}.mission-node.locked{opacity:.5}.mission-node .t{font-family:var(--display);font-size:16px}.mission-node .zh{font-family:var(--serif-tc);font-size:12px;color:var(--ink-faint)}.choice{display:flex;flex-direction:column;gap:var(--s3)}.choice button{text-align:left;background:var(--paper-2);border:var(--hairline);border-radius:var(--radius);padding:var(--s4);font-family:var(--mono);font-size:14px;color:var(--ink);transition:all .18s;display:flex;align-items:center;gap:var(--s3)}.choice button:hover{border-color:var(--primary);transform:translate(3px)}.choice button.correct{border-color:var(--success);background:color-mix(in srgb,var(--success) 8%,transparent);color:var(--success)}.choice button.wrong{border-color:var(--danger);background:color-mix(in srgb,var(--danger) 8%,transparent);color:var(--danger)}.choice .key{width:26px;height:26px;border-radius:var(--radius);border:var(--hairline);display:grid;place-items:center;font-size:12px;flex-shrink:0}.article{font-size:17px}.article h2{font-family:var(--display);font-weight:800;font-size:30px;letter-spacing:-.01em;margin:var(--s7) 0 var(--s2)}.article h2 .zh{display:block;font-family:var(--serif-tc);font-size:15px;color:var(--ink-soft);font-weight:500;margin-top:2px;letter-spacing:.1em}.article h2:first-child{margin-top:0}.article p{color:var(--ink-soft);max-width:62ch}.article .lead{font-family:var(--serif-tc);font-size:20px;line-height:1.8;color:var(--ink)}.article ul{color:var(--ink-soft)}.article a{color:var(--primary);border-bottom:1px solid var(--secondary)}.flow{display:flex;flex-direction:column;gap:var(--s3);margin:var(--s4) 0}.flow__row{display:flex;align-items:center;gap:var(--s4);flex-wrap:wrap}.flow__node{border:var(--hairline);background:var(--paper);border-radius:var(--radius);padding:var(--s3) var(--s5);font-family:var(--mono);font-size:13px;min-width:150px;text-align:center}.flow__node small{display:block;font-family:var(--serif-tc);color:var(--ink-faint);font-size:11px;margin-top:2px}.flow__node.is-active{border-color:var(--primary);color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary)}.flow__arrow{color:var(--secondary);font-size:20px}.vocab{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--s3)}.vocab__card{border:var(--hairline);border-radius:var(--radius);padding:var(--s4);background:var(--paper-2)}.vocab__card dt{font-family:var(--display);font-size:18px;font-weight:700}.vocab__card .zh{font-family:var(--serif-tc);color:var(--primary);font-size:13px}.vocab__card dd{margin:var(--s2) 0 0;font-size:13.5px;color:var(--ink-soft)}.ref-layout{display:grid;grid-template-columns:264px 1fr;gap:var(--s7);align-items:start}.sidebar{position:sticky;top:72px}.sidebar__group{margin-bottom:var(--s5)}.sidebar__group h4{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-faint);margin:0 0 var(--s3);display:flex;justify-content:space-between}.sidebar__group h4 .zh{font-family:var(--serif-tc);letter-spacing:normal;text-transform:none}.sidebar a{display:flex;align-items:center;justify-content:space-between;font-family:var(--mono);font-size:13.5px;color:var(--ink-soft);padding:7px 10px;border-radius:var(--radius);border-left:2px solid transparent;transition:all .15s}.sidebar a:hover{color:var(--ink);background:var(--secondary-2)}.sidebar a.active{color:var(--primary);border-left-color:var(--primary);background:color-mix(in srgb,var(--primary) 7%,transparent)}.search{position:relative}.search input{width:100%;font-family:var(--mono);font-size:13px;color:var(--ink);background:var(--paper-2);border:var(--hairline);border-radius:var(--radius);padding:11px 14px 11px 38px;transition:border-color .2s}.search input:focus{outline:none;border-color:var(--primary)}.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--ink-faint)}.search kbd{position:absolute;right:10px;top:50%;transform:translateY(-50%);font-family:var(--mono);font-size:10px;border:var(--hairline);border-radius:4px;padding:2px 6px;color:var(--ink-faint)}.progress{height:8px;background:var(--secondary-2);border-radius:100px;overflow:hidden}.progress__bar{height:100%;background:var(--primary);border-radius:100px;transition:width .8s var(--ease)}.xp-ring{--v: 0;width:96px;height:96px;border-radius:50%;background:conic-gradient(var(--primary) calc(var(--v)*1%),var(--secondary-2) 0);display:grid;place-items:center}.xp-ring__inner{width:74px;height:74px;border-radius:50%;background:var(--paper-2);display:grid;place-items:center;text-align:center}.xp-ring__inner b{font-family:var(--display);font-size:22px}.xp-ring__inner small{font-family:var(--mono);font-size:9px;letter-spacing:.15em;color:var(--ink-faint)}.tabs{display:flex;gap:var(--s1);border-bottom:var(--hairline)}.tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:10px 4px;margin-right:var(--s4);font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint)}.tabs button.active{color:var(--primary);border-bottom-color:var(--primary)}.tab-panel{display:none;padding-top:var(--s4)}.tab-panel.active{display:block;animation:fade .4s var(--ease)}.accordion__item{border-bottom:var(--hairline)}.accordion__head{display:flex;justify-content:space-between;align-items:center;padding:var(--s4) 0;cursor:pointer}.accordion__head h4{margin:0;font-family:var(--display);font-size:18px}.accordion__head .zh{font-family:var(--serif-tc);font-size:12px;color:var(--ink-faint)}.accordion__body{max-height:0;overflow:hidden;transition:max-height .35s var(--ease)}.accordion__body>div{padding-bottom:var(--s4);color:var(--ink-soft)}.accordion__item.open .accordion__head .chev{transform:rotate(45deg)}.chev{transition:transform .3s var(--ease);color:var(--primary)}.toast-wrap{position:fixed;top:70px;right:var(--s5);z-index:200;display:flex;flex-direction:column;gap:var(--s3)}.toast{background:var(--paper-2);border:var(--hairline);border-left:3px solid var(--success);border-radius:var(--radius);padding:var(--s3) var(--s4);box-shadow:var(--shadow);display:flex;gap:var(--s3);align-items:center;min-width:280px;animation:slideUp .4s var(--ease)}.toast b{font-family:var(--display);font-size:15px}.toast small{display:block;font-family:var(--serif-tc);color:var(--ink-faint);font-size:12px}.dialog-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:color-mix(in srgb,var(--ink) 55%,transparent);z-index:150;display:grid;place-items:center;padding:var(--s5);animation:fade .3s}.dialog{background:var(--paper);border:var(--hairline);border-radius:var(--radius-lg);max-width:460px;width:100%;padding:var(--s6);box-shadow:var(--shadow);animation:slideUp .4s var(--ease)}@keyframes fade{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.reveal{opacity:0;transform:translateY(16px)}.reveal.in{opacity:1;transform:none;transition:opacity .7s var(--ease),transform .7s var(--ease)}.footer{border-top:3px double var(--ink);margin-top:var(--s9);padding:var(--s7) 0 var(--s6)}.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:var(--s6)}.footer h5{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-faint);margin:0 0 var(--s4)}.footer a{display:block;color:var(--ink-soft);font-size:14px;padding:4px 0}.footer a:hover{color:var(--primary)}.footer__brand h3{font-family:var(--display);font-weight:900;font-size:28px;margin:0 0 var(--s2)}.footer__brand p{color:var(--ink-faint);font-size:13px;font-family:var(--serif-tc);max-width:34ch}.footer__bottom{display:flex;justify-content:space-between;margin-top:var(--s7);padding-top:var(--s4);border-top:var(--hairline);font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--ink-faint);text-transform:uppercase}.u-center{text-align:center}.u-mono{font-family:var(--mono)}.u-serif{font-family:var(--serif-tc)}.u-mt7{margin-top:var(--s7)}.u-mt5{margin-top:var(--s5)}.u-muted{color:var(--ink-soft)}.flex{display:flex}.between{justify-content:space-between}.items-center{align-items:center}.gap3{gap:var(--s3)}.gap4{gap:var(--s4)}.gap5{gap:var(--s5)}.wrap-flex{flex-wrap:wrap}:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:3px}@media(max-width:980px){.ref-layout{grid-template-columns:1fr}.sidebar{position:static}.footer__grid{grid-template-columns:1fr 1fr}}@media(max-width:720px){:root{--gutter: 18px}.topnav{gap:var(--s4);flex-wrap:wrap}.topnav__tools{position:static;transform:none;margin-top:var(--s3)}.masthead__meta{flex-direction:column;gap:4px;text-align:center}.footer__grid{grid-template-columns:1fr}.footer__bottom{flex-direction:column;gap:var(--s2)}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto}.reveal{opacity:1;transform:none}}