.pb-root{--pb-bg:#0b1016;--pb-panel:#121a24;--pb-panel-2:#172230;--pb-line:#22303f;--pb-text:#e9f0f7;--pb-dim:#9bacc0;--pb-accent:#4bd6a0;--pb-accent-soft:#4bd6a01f;--pb-info:#f0b34a;background:var(--pb-bg);min-height:100vh;color:var(--pb-text);font-family:Noto Sans TC,system-ui,-apple-system,Segoe UI,Microsoft JhengHei,sans-serif;line-height:1.8}.pb-shell{width:min(1120px,100% - 32px);margin-inline:auto}.pb-beta{color:#bfe6d0;background:#14251c;border-bottom:1px solid #2c4433;padding:9px 0;font-size:12.5px}.pb-beta b{color:var(--pb-accent);letter-spacing:.08em;margin-right:10px}.pb-nav{border-bottom:1px solid var(--pb-line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:18px 0;display:flex}.pb-brand{color:var(--pb-text);letter-spacing:.02em;align-items:center;gap:10px;font-weight:700;text-decoration:none;display:inline-flex}.pb-brand span{background:var(--pb-accent-soft);width:32px;height:32px;color:var(--pb-accent);border:1px solid #2a5c47;border-radius:9px;place-items:center;font-size:15px;display:inline-grid}.pb-nav a.pb-navlink{color:var(--pb-dim);margin-left:18px;font-size:14px;text-decoration:none}.pb-nav a.pb-navlink:hover{color:var(--pb-text)}.pb-hero{border-bottom:1px solid var(--pb-line);padding:56px 0 40px;position:relative;overflow:hidden}.pb-hero:before{content:"";pointer-events:none;background:radial-gradient(760px 420px at 82% 0,#4bd6a01a,#0000 65%);position:absolute;inset:0}.pb-eyebrow{letter-spacing:.24em;color:var(--pb-accent);font-size:11.5px;font-weight:700}.pb-hero h1{letter-spacing:.01em;margin:16px 0 10px;font-size:clamp(30px,5.4vw,54px);line-height:1.24}.pb-hero h1 span{color:var(--pb-accent)}.pb-hero .pb-lead{color:var(--pb-dim);max-width:46ch;margin:0;font-size:clamp(16px,2.1vw,20px)}.pb-promise{flex-wrap:wrap;gap:10px;margin:26px 0 0;padding:0;list-style:none;display:flex}.pb-promise li{background:var(--pb-accent-soft);color:#cdeede;border:1px solid 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minmax(0,1fr);align-items:start;gap:14px;height:100%;padding:16px 18px;text-decoration:none;display:grid}.pb-catalog a:hover{background:var(--pb-panel-2);border-color:#33506b}.pb-catalog b.pb-num{color:var(--pb-accent);font-size:19px;font-weight:700;line-height:1.4}.pb-catalog h3{margin:0 0 6px;font-size:16px;line-height:1.5}.pb-catalog p{color:var(--pb-dim);margin:0;font-size:13.5px;line-height:1.7}.pb-catalog small{color:#6f8296;margin-top:8px;font-size:12px;display:block}.pb-crumb{color:var(--pb-dim);padding:18px 0 0;font-size:13px}.pb-crumb a{color:var(--pb-dim);text-decoration:none}.pb-crumb a:hover{color:var(--pb-accent)}.pb-lesson-head{border-bottom:1px solid var(--pb-line);padding:12px 0 26px}.pb-lesson-head h1{margin:8px 0 12px;font-size:clamp(23px,3.6vw,36px);line-height:1.34}.pb-lesson-head p{color:var(--pb-dim);max-width:66ch;margin:0}.pb-meta{flex-wrap:wrap;gap:8px;margin-top:16px;display:flex}.pb-chip{border:1px solid var(--pb-line);color:var(--pb-dim);background:var(--pb-bg);border-radius:999px;padding:5px 12px;font-size:12px}.pb-chip.pb-soon{color:var(--pb-info);border-color:#5c4a2a}.pb-block{border-bottom:1px solid var(--pb-line);padding:34px 0}.pb-block:last-of-type{border-bottom:0}.pb-block h2{align-items:center;gap:10px;margin:0 0 6px;font-size:20px;display:flex}.pb-block h2 i{background:var(--pb-accent-soft);width:26px;height:26px;color:var(--pb-accent);border:1px solid #2a5c47;border-radius:8px;place-items:center;font-size:13px;font-style:normal;font-weight:700;display:inline-grid}.pb-block>p.pb-hint{color:var(--pb-dim);margin:0 0 18px;font-size:14px}.pb-prose p{color:#d3dde8;margin:0 0 16px;font-size:16px}.pb-video{background:#05070d;border-radius:14px;width:100%;max-height:min(70vh,720px);margin:16px 0;display:block;box-shadow:0 12px 34px #0000002e}.pb-list{color:#d3dde8;margin:0;padding-left:22px}.pb-list li{margin-bottom:12px;font-size:15.5px}.pb-steps{counter-reset:pbstep;margin:0;padding:0;list-style:none}.pb-steps li{counter-increment:pbstep;color:#d3dde8;margin-bottom:16px;padding:0 0 0 44px;font-size:15.5px;position:relative}.pb-steps li:before{content:counter(pbstep);background:var(--pb-accent-soft);width:28px;height:28px;color:var(--pb-accent);border:1px solid #2a5c47;border-radius:50%;place-items:center;font-size:13px;font-weight:700;display:grid;position:absolute;top:2px;left:0}.pb-prompt{border:1px solid var(--pb-line);background:var(--pb-panel);border-radius:12px;margin-bottom:14px;padding:16px 18px}.pb-prompt b{color:var(--pb-accent);letter-spacing:.04em;margin-bottom:10px;font-size:13px;display:block}.pb-prompt-text{white-space:pre-wrap;word-break:break-word;color:#dde7f1;background:var(--pb-bg);border:1px solid var(--pb-line);border-radius:9px;margin:0 0 12px;padding:13px 15px;font-size:15px;line-height:1.75}.pb-copy{border:1px solid var(--pb-line);color:var(--pb-dim);cursor:pointer;background:0 0;border-radius:8px;padding:7px 14px;font-family:inherit;font-size:13px}.pb-copy:hover{color:var(--pb-text);border-color:#33506b}.pb-tools{grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:10px;margin:0;padding:0;list-style:none;display:grid}.pb-tools li{border:1px solid var(--pb-line);background:var(--pb-panel);border-radius:11px;grid-template-columns:24px minmax(0,1fr);gap:10px;padding:13px 15px;display:grid}.pb-tools li.is-free-start{border-color:#2a5c47}.pb-tools li.is-free-limited{border-color:#5c4a2a}.pb-tools li.is-paid-optional{border-color:#2f4460}.pb-tools b{margin-bottom:3px;font-size:14.5px;display:block}.pb-tools b em{color:var(--pb-dim);margin-left:8px;font-size:11.5px;font-style:normal}.pb-tools p{color:var(--pb-dim);margin:0;font-size:13px;line-height:1.65}.pb-quiz-q{color:var(--pb-text);margin:0 0 18px;font-size:17px}.pb-options{gap:10px;margin-bottom:18px;display:grid}.pb-option{text-align:left;border:1px solid var(--pb-line);background:var(--pb-panel);width:100%;color:var(--pb-text);cursor:pointer;border-radius:11px;align-items:flex-start;gap:12px;padding:14px 16px;font-family:inherit;font-size:15.5px;line-height:1.6;display:flex}.pb-option:hover:not(:disabled){background:var(--pb-panel-2);border-color:#33506b}.pb-option:disabled{cursor:default}.pb-option i{color:var(--pb-dim);min-width:18px;font-style:normal;font-weight:700}.pb-option.is-correct{background:#4bd6a017;border-color:#2a5c47}.pb-option.is-correct i{color:var(--pb-accent)}.pb-option.is-wrong{background:#f2686a14;border-color:#6a3134}.pb-option.is-wrong i{color:#f2686a}.pb-verdict{margin:0 0 12px;font-size:15px;font-weight:700}.pb-verdict.ok{color:var(--pb-accent)}.pb-verdict.no{color:#f2686a}.pb-explain{border:1px solid var(--pb-line);background:var(--pb-panel);color:#d3dde8;border-radius:12px;padding:18px 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14px;font-family:inherit;font-size:14.5px;line-height:1.7}.pb-feedback textarea:focus{outline-offset:1px;outline:2px solid #2a5c47}.pb-fb-row{flex-wrap:wrap;align-items:center;gap:12px;margin-top:12px;display:flex}.pb-thanks{color:var(--pb-accent);margin:0;font-size:14px}.pb-pager{flex-wrap:wrap;justify-content:space-between;gap:12px;padding:8px 0 56px;display:flex}.pb-pager a,.pb-pager span{border:1px solid var(--pb-line);color:var(--pb-text);background:var(--pb-panel);border-radius:12px;flex:240px;padding:15px 18px;text-decoration:none}.pb-pager a:hover{background:var(--pb-panel-2);border-color:#33506b}.pb-pager small{color:var(--pb-dim);margin-bottom:4px;font-size:12px;display:block}.pb-pager .pb-next{text-align:right;border-color:#2a5c47}.pb-pager span.pb-disabled{opacity:.4}.pb-footer{border-top:1px solid var(--pb-line);color:var(--pb-dim);flex-wrap:wrap;justify-content:space-between;gap:10px;padding:26px 0 46px;font-size:13px;display:flex}.pb-soon-box{color:var(--pb-info);background:#1d1a12;border:1px dashed #5c4a2a;border-radius:11px;padding:14px 16px;font-size:14px}@media (max-width:640px){.pb-hero{padding:38px 0 30px}.pb-block{padding:28px 0}.pb-catalog{grid-template-columns:minmax(0,1fr)}.pb-pager a,.pb-pager span{flex-basis:100%}}.pb-copy-manual{color:var(--pb-info);margin:10px 0 0;font-size:13px;line-height:1.7}