:root{--background: #ffffff;--black: #111;--gray: #9ca3af;--red: #dc2626;--green: #16a34a;--amber: #d97706}html.dark{--background: #202226;--black: #eeeeee}.exam-blank{appearance:none;background:#e9e9ed;border:none;border-radius:4px;box-decoration-break:clone;-webkit-box-decoration-break:clone;color:inherit;cursor:pointer;display:inline;font:inherit;line-height:inherit;padding:0 .4em;position:relative;vertical-align:baseline;white-space:normal;min-width:6em;margin:0 .5em}.exam-blank:hover{background:#d0d0d7}.exam-blank:focus-visible{outline:2px solid color-mix(in srgb,var(--black) 55%,transparent);outline-offset:2px}.exam-blank.is-disabled{color:#6d6d6d;cursor:default;display:inline-block}html.dark .exam-blank{background:#343434;color:#fff}html.dark .exam-blank:hover{background:#474747}html.dark .exam-blank.is-disabled{color:#8f8f8f}.exam-blank.is-disabled:hover{background:#e9e9ed}html.dark .exam-blank.is-disabled:hover{background:#343434}.exam-blank-placeholder{align-items:center;display:flex;inset:0;justify-content:center;pointer-events:none;position:absolute;text-align:center;white-space:nowrap}.exam-blank[aria-pressed=true] .exam-blank-placeholder{display:none}.exam-blank-answer{overflow-wrap:anywhere;visibility:hidden;white-space:normal}.exam-blank[aria-pressed=true] .exam-blank-answer{visibility:visible}.exam-blank[aria-pressed=true].exam-blank{background:transparent;border-radius:0;box-shadow:inset 0 -1px color-mix(in srgb,var(--black) 35%,transparent)}.exam-blank[aria-pressed=true].exam-blank:hover{background:transparent;border-radius:4px;box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--black) 35%,transparent)}.exam-slot{display:inline-block;min-width:2.5em;text-align:center;vertical-align:baseline;white-space:pre}.exam-solution{background:color-mix(in srgb,var(--background) 97%,var(--black) 3%);border:1px solid color-mix(in srgb,var(--background) 84%,var(--black) 16%);border-radius:4px;display:flow-root;margin:1em 0;overflow:hidden}.exam-solution-summary{align-items:center;color:color-mix(in srgb,var(--black) 84%,var(--background) 16%);cursor:pointer;display:flex;font-size:.96em;font-weight:600;gap:.75em;justify-content:space-between;list-style:none;padding:.8em 1em;transition:background-color .18s ease,color .18s ease;user-select:none}.exam-solution-summary::-webkit-details-marker{display:none}.exam-solution-summary::marker{content:""}.exam-solution-summary-main{align-items:center;display:inline-flex;gap:.65em;min-width:0}.exam-solution-summary-icon{flex:none;font-size:1.2em;line-height:1;transform:translateY(-.02em);transition:transform .18s ease}.exam-solution-summary-hint{color:color-mix(in srgb,var(--black) 55%,var(--background) 45%);font-size:.84em;font-weight:500}.exam-solution-summary-hint:before{content:"展开"}.exam-solution-summary:hover{background:color-mix(in srgb,var(--background) 92%,var(--black) 8%)}.exam-solution-summary:focus-visible{outline:2px solid color-mix(in srgb,var(--black) 45%,transparent);outline-offset:-2px}.exam-solution[open] .exam-solution-summary{background:color-mix(in srgb,var(--background) 90%,var(--black) 10%);border-bottom:1px solid color-mix(in srgb,var(--background) 84%,var(--black) 16%)}.exam-solution[open] .exam-solution-summary-icon{transform:translateY(-.02em) rotate(90deg)}.exam-solution[open] .exam-solution-summary-hint:before{content:"收起"}.exam-solution-content{color:color-mix(in srgb,var(--black) 88%,var(--background) 12%);overflow-x:auto;overflow-y:hidden;overscroll-behavior-x:contain;padding:1em}.exam-solution-content>:first-child{margin-top:0}.exam-solution-content>:last-child{margin-bottom:0}.exam-choices{border:none;margin:1em 0;padding:0}.exam-choices-item{color:color-mix(in srgb,var(--black) 78%,var(--background) 22%);font-size:.92em;font-weight:600;margin-bottom:.55em}.exam-choices-options{display:grid;gap:.55em;margin-bottom:.75em}.exam-choice-letter{font-size:1.05em;font-weight:700;line-height:1.5;min-width:1.6em;text-align:left}.exam-choice-option{align-items:start;border:1px solid color-mix(in srgb,var(--background) 84%,var(--black) 16%);border-radius:12px;column-gap:.4em;cursor:pointer;display:grid;grid-template-columns:.9em 1em minmax(0,1fr);line-height:1.55;padding:.55em .75em;transition:background-color .15s ease,border-color .15s ease,box-shadow .15s ease}.exam-choice-option:hover{background:color-mix(in srgb,var(--background) 95%,var(--black) 5%);border-color:color-mix(in srgb,var(--background) 72%,var(--black) 28%)}.exam-choice-input{appearance:none;margin:0;opacity:0;pointer-events:none;position:absolute}.exam-choices .exam-choice-indicator{background:var(--background);border:1.5px solid var(--gray);display:inline-block;flex:none;height:.9em;margin-top:.35em;position:relative;vertical-align:top;width:.9em}.exam-choice-content{display:block;min-width:0}.exam-choice-content>:first-child{margin-top:0}.exam-choice-content>:last-child{margin-bottom:0}.exam-choices.single .exam-choice-indicator{border-radius:50%}.exam-choices .exam-choice-input:checked+.exam-choice-indicator{border-color:var(--black)}.exam-choices .exam-choice-input:checked+.exam-choice-indicator:after{background:var(--black);content:"";inset:2px;place-items:center;position:absolute}.exam-choices.single .exam-choice-input:checked+.exam-choice-indicator:after{border-radius:50%}.exam-choices .exam-choice-option.is-correct{border-color:var(--green);background:color-mix(in srgb,var(--background) 94%,var(--green) 6%)}.exam-choices .exam-choice-option.is-correct .exam-choice-indicator{border-color:var(--green)}.exam-choices .exam-choice-option.is-correct .exam-choice-indicator:after{background:var(--green)}.exam-choices .exam-choice-option.is-wrong{border-color:var(--red);background:color-mix(in srgb,var(--background) 94%,var(--red) 6%)}.exam-choices .exam-choice-option.is-wrong .exam-choice-indicator{border-color:var(--red)}.exam-choices .exam-choice-option.is-wrong .exam-choice-indicator:after{background:var(--red)}.exam-choices .exam-choice-option.is-missed{border-color:var(--amber);background:color-mix(in srgb,var(--background) 94%,var(--amber) 6%)}.exam-choices .exam-choice-option.is-missed .exam-choice-indicator{border-color:var(--amber)}.exam-choices .exam-choice-option.is-missed .exam-choice-indicator:after{background:var(--amber);content:"";inset:2px;position:absolute}.exam-choices.single .exam-choice-option.is-missed .exam-choice-indicator:after{border-radius:50%}.exam-choices-submit{background:var(--background);border:1px solid color-mix(in srgb,var(--background) 76%,var(--black) 24%);border-radius:12px;cursor:pointer;font-size:.875rem;font-weight:500;line-height:1.2;padding:.5em 1em;transition:background-color .15s ease,border-color .15s ease,color .15s ease,box-shadow .15s ease;box-shadow:0 1px 2px #0000000d}.exam-choices-submit:hover:not(:disabled){background:color-mix(in srgb,var(--background) 92%,var(--black) 8%);border-color:color-mix(in srgb,var(--background) 64%,var(--black) 36%)}.exam-choices-submit:disabled{color:#6d6d6d;cursor:default}.exam-choices-submit.is-all-correct{color:var(--green)}.exam-choices-submit.is-not-all-correct{color:var(--red)}.exam-figure{margin:1em 0;border-radius:8px}.exam-figure-trigger{background:none;border:none;border-radius:inherit;cursor:zoom-in;display:block;max-width:100%;padding:0;text-align:inherit;width:fit-content}.exam-figure-trigger[aria-disabled=true]{cursor:default}.exam-figure-trigger:focus-visible{outline:2px solid color-mix(in srgb,var(--black) 55%,transparent);outline-offset:4px}.exam-figure-media{display:grid;background:var(--exam-figure-background, transparent);padding:1em;justify-items:start;min-height:4rem;max-width:100%;width:fit-content}.exam-figure-image{display:block;height:auto;max-width:100%}.exam-figure-missing{align-content:center;background:color-mix(in srgb,var(--background) 96%,var(--black) 4%);border:1px dashed color-mix(in srgb,var(--background) 76%,var(--black) 24%);border-radius:8px;color:color-mix(in srgb,var(--black) 80%,var(--background) 20%);display:none;gap:.4rem;justify-items:start;min-height:10rem;padding:1rem;text-align:start;width:100%}.exam-figure[data-state=missing] .exam-figure-image{display:none}.exam-figure[data-state=missing] .exam-figure-missing{display:grid}.exam-figure-missing-title{font-size:.95rem;font-weight:600;letter-spacing:.01em}.exam-figure-missing-meta{background:color-mix(in srgb,var(--background) 88%,var(--black) 12%);border-radius:4px;cursor:text;font-family:ui-monospace,SFMono-Regular,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:.8rem;padding:.2rem;line-height:.7lh;opacity:.8;overflow-wrap:anywhere;user-select:all;-webkit-user-select:all}.exam-figure-float{background:var(--background);border:solid 1px #bbb;clear:right;float:right;margin:0 0 1em 1em;max-width:100%;padding:.5em;width:300px}.exam-figure-float .exam-figure-media{justify-items:center;width:100%}.exam-figure-float .exam-figure-trigger{margin-inline:auto;width:100%}.exam-figure-float .exam-figure-image{margin:auto;width:100%}.exam-figure-float .exam-figure-missing{justify-items:center;min-height:8rem;text-align:center}html.dark .exam-figure-float{border:solid 1px #444}.exam-figure-caption{color:#444;font-size:.9em;margin-top:.5em;text-align:start}.exam-figure-float .exam-figure-caption{text-align:center}.exam-figure-dialog{background:none;border:none;height:100vh;inset:0;margin:0;max-height:none;max-width:none;padding:2vh 2vw;width:100vw}.exam-figure-dialog[open]{display:grid;place-items:center}.exam-figure-dialog::backdrop{background:#0f172ad1;backdrop-filter:blur(4px)}.exam-figure-dialog-panel{align-items:center;display:flex;flex-direction:column;justify-content:center;max-height:96vh;max-width:96vw;position:relative}.exam-figure-dialog-media{align-items:center;display:flex;justify-content:center;max-height:88vh;max-width:92vw;position:relative}.exam-figure-dialog-image{background:var(--exam-figure-background, transparent);border-radius:8px;display:block;height:auto;max-height:88vh;max-width:92vw;object-fit:contain;width:auto}.exam-figure-dialog-svg-container{display:flex;justify-content:center;align-items:center;max-height:88vh;max-width:92vw}.exam-figure-dialog-fallback{align-items:center;background:#0f172ae0;border:1px dashed rgb(148 163 184 / 45%);border-radius:8px;color:#e5e7eb;display:grid;gap:.5rem;justify-items:center;min-height:min(50vh,18rem);padding:1.25rem;text-align:center;width:min(92vw,40rem)}.exam-figure-dialog-fallback[hidden]{display:none}.exam-figure-dialog-fallback p{margin:0}.exam-figure-dialog-fallback-title{font-size:1rem;font-weight:600;letter-spacing:.01em}.exam-figure-dialog-fallback-meta{background:#ffffff1a;border-radius:8px;cursor:text;font-family:ui-monospace,SFMono-Regular,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:.875rem;opacity:.84;padding:.45rem .6rem;overflow-wrap:anywhere;user-select:all;-webkit-user-select:all}.exam-figure-dialog-svg{background:var(--exam-figure-background, transparent);border-radius:8px;display:block;height:100%;width:100%}.exam-figure-dialog-caption{color:#e5e7eb;font-size:.95rem;max-width:92vw;margin-top:.75em;text-align:center}.exam-figure-dialog-caption p{margin:0}html.dark .exam-figure-caption{color:#bbb}.exam-audio{margin:1em 0}.exam-audio-player{display:block;max-width:100%;width:min(100%,36rem)}.exam-audio-caption{color:#444;font-size:.9em;margin-top:.5em;text-align:start}html.dark .exam-audio-caption{color:#bbb}.exam-page-layout{min-width:0;position:relative}.exam-page-main{min-width:0}.exam-page-main :where(h2[id],h3[id]){scroll-margin-top:6rem}.exam-toc-shell{display:none}.exam-toc-panel,.exam-toc-mobile-panel{background:#fffffffa;border:1px solid rgb(226 232 240 / .95);border-radius:.8rem;box-shadow:0 10px 30px #0f172a14;overflow:hidden}.exam-toc-header,.exam-toc-mobile-header{border-bottom:1px solid rgb(226 232 240 / .95);transition:border-color .2s ease}.exam-toc-header{padding:.4rem}.exam-toc-mobile-header{padding:.7rem .8rem}.exam-toc-mobile-title{color:#0f172af5;font-size:.9rem;font-weight:700;letter-spacing:.01em;line-height:1;margin:0}.exam-toc-toggle{align-items:center;background:transparent;border:none;border-radius:.6rem;color:#334155eb;cursor:pointer;display:flex;font-size:.9rem;font-weight:700;gap:.55rem;line-height:1;padding:.58rem .65rem;transition:background-color .15s ease,color .15s ease;width:100%}.exam-toc-toggle:hover{background:#f1f5f9f2;color:#0f172af5}.exam-toc-toggle:focus-visible,.exam-toc-branch-toggle:focus-visible,.exam-toc-link:focus-visible{outline:2px solid rgb(59 130 246 / .45);outline-offset:2px}.exam-toc-toggle-label{white-space:nowrap}.exam-toc-toggle-icon{flex:none;height:1rem;width:1rem}.exam-toc-nav{--exam-toc-branch-size: 1.4rem;--exam-toc-row-gap: .2rem;--exam-toc-sublist-padding: .42rem;overflow:auto;padding:.4rem}.exam-toc-nav-mobile{flex:1;min-height:0}.exam-toc-list,.exam-toc-sublist{list-style:none;margin:0;padding:0}.exam-toc-list{display:grid;gap:.18rem}.exam-toc-sublist{border-left:1px solid rgb(226 232 240 / .95);display:grid;gap:.12rem;margin-left:calc(var(--exam-toc-branch-size) + var(--exam-toc-row-gap) - var(--exam-toc-sublist-padding));padding-left:var(--exam-toc-sublist-padding)}.exam-toc-item{display:grid;gap:.12rem;margin-block:2px}.exam-toc-row{align-items:flex-start;display:flex;gap:var(--exam-toc-row-gap);min-width:0}.exam-toc-branch-toggle,.exam-toc-branch-spacer{flex:none;height:var(--exam-toc-branch-size);width:var(--exam-toc-branch-size)}.exam-toc-branch-spacer{margin-top:.22rem}.exam-toc-branch-toggle{align-self:center;align-items:center;appearance:none;background:transparent;border:none;border-radius:.45rem;color:#64748bf5;cursor:pointer;display:inline-flex;justify-content:center;padding:0;transition:background-color .15s ease,color .15s ease}.exam-toc-branch-toggle:hover{background:#f1f5f9f2;color:#0f172af5}.exam-toc-branch-toggle svg{height:.92rem;transition:transform .2s ease;width:.92rem}.exam-toc-item[data-expanded=true]>.exam-toc-row .exam-toc-branch-toggle svg{transform:rotate(90deg)}.exam-toc-link{border-radius:.3rem;color:#334155eb;display:block;flex:1;line-height:2;min-width:0;padding:.34rem .6rem;text-decoration:none;transition:background-color .15s ease,color .15s ease,box-shadow .15s ease}.exam-toc-link:hover{background:#f1f5f9f2;color:#0f172af5}.exam-toc-link-label{display:block}.exam-toc-link-level-1{font-size:.88rem;font-weight:680}.exam-toc-link-level-2{color:#475569eb;font-size:.79rem}.exam-toc-link.is-in-path{background:#e2e8f073;color:#334155f5}.exam-toc-link.is-active{background:#0f172af2;box-shadow:0 8px 18px #0f172a29;color:#fff}.exam-toc-children{display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows .2s ease,opacity .2s ease}.exam-toc-item[data-expanded=true]>.exam-toc-children{grid-template-rows:1fr;opacity:1}.exam-toc-children-inner{overflow:hidden}.exam-toc-mobile{inset:0;pointer-events:none;position:fixed;z-index:60}.exam-toc-mobile[data-open=true]{pointer-events:auto}.exam-toc-mobile-backdrop{appearance:none;background:#0f172a52;border:none;inset:0;opacity:0;position:absolute;transition:opacity .2s ease}.exam-toc-mobile[data-open=true] .exam-toc-mobile-backdrop{opacity:1}.exam-toc-mobile-panel{border-radius:.8rem;bottom:calc(7rem + env(safe-area-inset-bottom));display:flex;flex-direction:column;max-height:min(70vh,34rem);opacity:0;overflow:hidden;pointer-events:none;position:absolute;right:1rem;transform:translate3d(0,.75rem,0);transition:opacity .22s ease,transform .22s ease;width:min(20rem,calc(100vw - 2rem))}.exam-toc-mobile[data-open=true] .exam-toc-mobile-panel{opacity:1;pointer-events:auto;transform:translateZ(0)}html.dark .exam-toc-panel,html.dark .exam-toc-mobile-panel{background:#0f172afa;border:1px solid rgb(51 65 85 / .95);box-shadow:0 12px 30px #02061747}html.dark .exam-toc-header,html.dark .exam-toc-mobile-header{border-bottom-color:#334155f2}html.dark .exam-toc-mobile-title,html.dark .exam-toc-toggle{color:#e2e8f0eb}html.dark .exam-toc-toggle:hover,html.dark .exam-toc-branch-toggle:hover{background:#1e293bf5;color:#f8fafcfa}html.dark .exam-toc-branch-toggle{color:#94a3b8f5}html.dark .exam-toc-link{color:#cbd5e1eb}html.dark .exam-toc-link:hover,html.dark .exam-toc-link.is-in-path{background:#1e293b9e;color:#cbd5e1f0}html.dark .exam-toc-link-level-2{color:#94a3b8f5}html.dark .exam-toc-link.is-active{background:#1e293bfa;box-shadow:inset 0 0 0 1px #60a5fa52;color:#f8fafcfa}html.dark .exam-toc-sublist{border-left-color:#334155f2}html.dark .exam-toc-mobile-backdrop{background:#02061785}@media(min-width:1680px){.exam-page-main{margin-inline:auto;width:min(100%,72rem)}.exam-toc-shell{display:block;bottom:0;left:0;position:fixed;top:calc(4.75rem + 1px);pointer-events:none;transform:translate(calc(-1 * var(--exam-sidebar-width-expanded, clamp(20rem, 22vw, 26rem))));transition:transform .22s ease;width:calc(var(--exam-sidebar-width-expanded, clamp(20rem, 22vw, 26rem)) + var(--exam-sidebar-trigger-width, 2.75rem));z-index:35}html[data-exam-toc-desktop=expanded] .exam-toc-shell{transform:translate(0)}.exam-toc-panel{background:#f8fafcfa;border:none;border-radius:0;border-right:1px solid rgb(226 232 240 / .95);box-shadow:12px 0 32px #0f172a14;height:100%;max-height:none;pointer-events:auto;width:var(--exam-sidebar-width-expanded, clamp(20rem, 22vw, 26rem))}.exam-toc-shell[data-collapsed=true] .exam-toc-panel{border-right-color:transparent;box-shadow:none}.exam-toc-desktop-trigger{left:var(--exam-sidebar-width-expanded, clamp(20rem, 22vw, 26rem));pointer-events:auto;position:absolute;top:1rem}.exam-toc-nav{height:100%;max-height:none;padding:.9rem .8rem 1.25rem}.exam-toolbar-toc-toggle,.exam-toc-mobile{display:none!important}html.dark .exam-toc-panel{background:#020617fa;border-right-color:#334155f2;box-shadow:14px 0 34px #02061747}}@media(max-width:640px){.exam-toc-mobile-panel{right:.75rem;bottom:calc(6.6rem + env(safe-area-inset-bottom));width:min(20rem,calc(100vw - 1.5rem))}.exam-figure-float{box-sizing:border-box;clear:none;float:none;margin:1em 0;max-width:none;width:100%}.exam-figure-float .exam-figure-media{justify-items:start}.exam-figure-float .exam-figure-trigger{margin-inline:0}.exam-figure-float .exam-figure-image{width:100%}.exam-figure-float .exam-figure-missing{justify-items:start;text-align:start}.exam-figure-float .exam-figure-caption{text-align:start}}