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var(--line);background:#fffffff0;position:sticky;top:0}.ivu-topbar-in{max-width:var(--wide);justify-content:space-between;align-items:center;height:56px;margin:0 auto;padding:0 20px;display:flex}.ivu-brand{color:var(--ink);letter-spacing:.02em;align-items:center;gap:10px;font-size:15px;font-weight:700;text-decoration:none;display:flex}.ivu-brand:hover{color:var(--brand-deep)}.ivu-brand-square{background:var(--brand);flex:none;width:12px;height:12px}.ivu-brand em{color:var(--ink-2);font-style:normal;font-weight:400}.ivu-back{color:var(--ink-2);padding:6px 2px;font-size:13px;text-decoration:none}.ivu-back:hover{color:var(--brand-deep)}.ivu-wide{max-width:var(--wide);margin:0 auto;padding:0 20px}.ivu-measure{max-width:var(--measure);margin:0 auto;padding:0 20px}.ivu-list-head{padding:64px 0 8px}.ivu-list-kicker{letter-spacing:.18em;color:var(--ink-3);font-size:13px;font-family:var(--font-mono);margin-bottom:10px}.ivu-list-title{font-family:var(--font-serif);margin:0 0 12px;font-size:40px;font-weight:700;line-height:1.3}.ivu-list-sub{color:var(--ink-2);max-width:560px;margin:0;font-size:16px}.ivu-tags{flex-wrap:wrap;gap:10px;padding:26px 0 34px;display:flex}.ivu-tag{border:1px solid var(--line);background:var(--card);color:var(--ink-2);cursor:pointer;border-radius:999px;padding:5px 14px;font-family:inherit;font-size:13px;transition:all .15s}.ivu-tag:hover{border-color:var(--brand);color:var(--brand-deep)}.ivu-tag.on{background:var(--brand);border-color:var(--brand);color:#fff}.ivu-grid{grid-template-columns:repeat(3,1fr);gap:28px;padding-bottom:24px;display:grid}.ivu-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);color:inherit;flex-direction:column;text-decoration:none;transition:transform .18s,box-shadow .18s,border-color 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20px;display:flex}.ivu-card-title{-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:17px;font-weight:700;line-height:1.5;display:-webkit-box;overflow:hidden}.ivu-card-q{color:var(--ink-2);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;font-size:14px;display:-webkit-box;overflow:hidden}.ivu-card-meta{color:var(--ink-3);flex-wrap:wrap;align-items:center;gap:8px;margin-top:auto;padding-top:10px;font-size:12.5px;display:flex}.ivu-chip{background:var(--paper-2);color:var(--ink-2);border-radius:999px;padding:3px 10px;font-size:12px}.ivu-empty{color:var(--ink-2);padding:30px 0 60px}.ivu-hero{background:var(--paper-2)}.ivu-hero img{aspect-ratio:16/9;object-fit:cover;width:100%;display:block}.ivu-head{padding-top:44px}.ivu-meta{color:var(--ink-3);flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px;font-size:13px;display:flex}.ivu-meta .qno{font-family:var(--font-serif);color:var(--brand-deep);font-size:15px}.ivu-h1{letter-spacing:.01em;margin:0 0 14px;font-size:30px;font-weight:700;line-height:1.45}.ivu-lede{color:var(--ink-2);margin:0 0 26px;font-size:17px}.ivu-rule{border-top:2px solid var(--line-strong);border-bottom:1px solid var(--line);height:7px;margin-bottom:34px}.ivu-question{border-top:1px dashed var(--line-strong);border-bottom:1px dashed var(--line-strong);gap:22px;margin:0 0 44px;padding:26px 4px;display:flex}.ivu-question-no{font-family:var(--font-serif);color:var(--brand);border-right:1px solid var(--line);flex:none;padding-right:22px;font-size:54px;line-height:1}.ivu-question-main{flex:1}.ivu-question-label{letter-spacing:.14em;color:var(--mark);margin-bottom:8px;font-size:12.5px}.ivu-question-text{margin:0;font-size:21px;font-weight:600;line-height:1.7}.ivu-question-who{color:var(--ink-3);align-items:center;gap:8px;margin-top:14px;font-size:13px;display:flex}.ivu-question-who:before{content:"";background:var(--brand);width:6px;height:6px;display:inline-block}.ivu-prose{padding-bottom:10px}.ivu-prose p{margin:0 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var(--line-strong);color:var(--ink)}.ivu-btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep)}.ivu-footer{border-top:1px solid var(--line);color:var(--ink-3);flex-wrap:wrap;justify-content:space-between;gap:16px;margin-top:64px;padding:26px 0 46px;font-size:12.5px;display:flex}.ivu-footer a{color:var(--ink-2);text-decoration:none}.ivu-footer a:hover{color:var(--brand-deep)}@media (min-width:1101px){.ivu-with-toc{grid-template-columns:minmax(0,var(--measure))220px;max-width:calc(var(--measure) + 296px);align-items:start;gap:56px;display:grid}.ivu-toc{display:block}}.ivu-h1,.ivu-question-text,.ivu-card-title,.ivu-list-title{overflow-wrap:anywhere;word-break:break-word}@media (max-width:1100px){.ivu-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:640px){.ivu-root{font-size:17px}.ivu-list-head{padding-top:44px}.ivu-list-title{font-size:32px}.ivu-grid{grid-template-columns:1fr}.ivu-hero 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