.pg-guide{--pg-accent:#ffffff;--pg-green:#00e87a;--pg-red:#ef4444;--sidebar-w:240px;--nav-h:var(--nav-height,72px);--fs-hero:clamp(32px,5vw,60px);--fs-h2:clamp(26px,3.5vw,42px);--lh-heading:1.08;font-family:var(--font-sans);font-size:16px;line-height:var(--lh-body);-webkit-font-smoothing:antialiased}body.pg-guide-active,html.pg-guide-active{overflow-x:visible}.pg-guide .page-layout{position:relative;z-index:1;width:100%;max-width:100%;padding:48px 0 80px;display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);gap:52px;align-items:start}.pg-guide .sidebar-column{position:sticky;top:calc(var(--nav-h) + 24px);align-self:start;width:var(--sidebar-w);min-width:0;max-height:calc(100vh - var(--nav-h) - 48px);overflow-y:auto;overflow-x:visible;z-index:30;scrollbar-width:thin}.pg-guide .pg-article-main{min-width:0;width:100%}.pg-guide .sidebar{width:100%}.pg-guide .sidebar-toc{background:var(--bg-card);border:1px solid var(--white-6);border-radius:var(--radius-card,16px);overflow:hidden}.pg-guide .toc-header{padding:14px 18px;border-bottom:1px solid var(--white-6);font-family:var(--font-mono);font-size:var(--fs-label);font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--pg-accent);opacity:.8}.pg-guide .toc-list{list-style:none;padding:12px 0;margin:0}.pg-guide .toc-item a{display:flex;align-items:center;gap:8px;padding:10px 18px;font-family:var(--font-mono);font-size:var(--fs-small);color:var(--white-50);text-decoration:none;border-left:2px solid transparent;transition:color .2s,border-color .2s,background .2s;letter-spacing:.2px}.pg-guide .toc-item a:hover{color:var(--white-80);background:var(--white-4)}.pg-guide .toc-item a.active{color:var(--pg-accent);border-left-color:var(--pg-accent);background:var(--accent-dim)}.pg-guide .toc-item a .toc-num{font-size:var(--fs-caption,12px);color:var(--white-50);min-width:20px;opacity:.7}.pg-guide .toc-item a.active .toc-num{color:var(--pg-accent)}.pg-guide .sidebar-verdict{margin-top:16px;background:rgba(255,255,255,.04);border:1px solid var(--accent-border);border-radius:var(--radius-card,16px);padding:18px}.pg-guide .sv-label{font-size:var(--fs-label);letter-spacing:1.5px;text-transform:uppercase;color:var(--pg-accent)}.pg-guide .sv-formula,.pg-guide .sv-label{font-family:var(--font-mono);font-weight:600;margin-bottom:10px}.pg-guide .sv-formula{font-size:var(--fs-small);line-height:1.5;color:var(--white-80)}.pg-guide .sv-text{font-size:var(--fs-small);color:var(--white-50);margin-top:8px;line-height:var(--lh-body);font-weight:300}.pg-guide .sv-cta{display:block;margin-top:14px;text-align:center;background:var(--accent);color:var(--black);font-family:var(--font-mono);font-size:var(--fs-small);font-weight:700;letter-spacing:.2px;padding:10px;border-radius:var(--radius-btn,6px);text-decoration:none;transition:opacity .2s,box-shadow .2s}.pg-guide .sv-cta:hover{opacity:.9;box-shadow:0 0 16px var(--accent-glow)}.pg-guide .pg-sec{padding-top:var(--section-py);padding-bottom:var(--section-py);background:var(--bg);border-top:1px solid var(--white-6);scroll-margin-top:calc(var(--nav-h) + 20px)}.pg-guide .two-col{margin-bottom:52px}.pg-guide .pg-faq-header{margin-bottom:48px}.pg-guide .pg-faq-header.two-col{align-items:end}.pg-hero{padding:48px 0 64px;text-align:center}.pg-hero-inner{max-width:100%;margin:0 auto}.pg-guide .pg-badge-row,.pg-guide .pg-hero-ctas,.pg-guide .pg-hero-trust{max-width:1040px;margin-left:auto;margin-right:auto}.pg-badge-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:10px;margin-bottom:24px}.pg-guide .pg-badge-row .hero-badge,.pg-guide .pg-badge-row .pg-badge{margin-bottom:0;padding:5px 12px;font-size:var(--fs-label);font-weight:600;letter-spacing:1.2px;line-height:1.2;border-radius:4px}.pg-badge{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:var(--fs-micro);font-weight:600;letter-spacing:1px;text-transform:uppercase;padding:4px 10px;border-radius:4px}.pg-badge-guide{color:var(--pg-accent);background:var(--accent-dim);border:1px solid var(--accent-border)}.pg-badge-guide svg{width:10px;height:10px}.pg-badge-count{color:var(--white-60);background:var(--white-4);border:1px solid var(--white-10)}.pg-badge-update{color:var(--green-accent);background:var(--green-dim);border:1px solid var(--green-border)}.pg-guide .pg-hero .hero-h1,.pg-guide .pg-hero .hero-sub{text-align:center;margin-left:auto;margin-right:auto}.pg-guide .pg-hero .hero-h1{max-width:1200px;color:var(--text);letter-spacing:-2px}.pg-guide .pg-hero .hero-h1 .acc{text-shadow:none}.pg-guide .sec-h2{margin-bottom:16px}.pg-guide .pg-hero .hero-sub{max-width:960px;margin-bottom:0}.pg-guide .pg-hero-ctas{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:16px;margin-top:40px;margin-bottom:36px}.pg-guide .pg-hero-trust{justify-content:center}.pg-hero-formula{margin-bottom:28px;padding:18px 20px;border-radius:12px;border:1px solid var(--accent-border);background:linear-gradient(135deg,rgba(255,255,255,.07),rgba(255,255,255,.02));box-shadow:0 0 32px rgba(255,255,255,.04)}.pg-hero-formula-label{display:block;margin-bottom:10px}.pg-hero-formula-code{display:block;font-family:var(--font-mono);font-size:var(--fs-small);font-weight:600;line-height:1.65;color:var(--white-80);word-break:break-word}.pg-trust-strip{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-bottom:32px}.pg-formula-equation{position:relative;margin-bottom:40px;padding:28px 32px;border-radius:16px;border:1px solid var(--accent-border);background:linear-gradient(135deg,rgba(255,255,255,.06) 0,rgba(255,255,255,.02) 100%),var(--bg-card);box-shadow:inset 0 0 0 1px rgba(255,255,255,.04),0 24px 64px rgba(0,0,0,.35);overflow:hidden}.pg-formula-equation-glow{position:absolute;inset:-40% -20% auto;height:120%;pointer-events:none;background:radial-gradient(ellipse 70% 55% at 50% 0,rgba(0,232,122,.12) 0,transparent 68%)}.pg-formula-equation-label,.pg-formula-equation-row{position:relative;margin-bottom:18px}.pg-formula-equation-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 6px}.pg-formula-equation-segment{display:inline-flex;align-items:center;gap:6px}.pg-formula-equation-chip{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:var(--fs-small);font-weight:600;letter-spacing:-.2px;color:var(--text);padding:10px 14px;border-radius:8px;background:rgba(0,0,0,.45);border:1px solid var(--white-15);box-shadow:0 0 20px rgba(255,255,255,.04);white-space:nowrap}.pg-formula-equation-num{display:grid;place-items:center;width:22px;height:22px;border-radius:5px;font-size:var(--fs-label);font-weight:700;flex-shrink:0}.pg-formula-equation-chip.is-subject .pg-formula-equation-num{color:var(--green-accent);background:var(--green-dim);border:1px solid var(--green-border)}.pg-formula-equation-chip.is-camera .pg-formula-equation-num{color:#60a5fa;background:rgba(59,130,246,.12);border:1px solid rgba(59,130,246,.25)}.pg-formula-equation-chip.is-lighting .pg-formula-equation-num{color:#fbbf24;background:rgba(251,191,36,.1);border:1px solid rgba(251,191,36,.25)}.pg-formula-equation-chip.is-audio .pg-formula-equation-num{color:#c084fc;background:rgba(192,132,252,.1);border:1px solid rgba(192,132,252,.25)}.pg-formula-equation-op{font-family:var(--font-mono);font-size:18px;font-weight:600;color:var(--pg-accent);line-height:1;padding:0 2px;text-shadow:0 0 16px rgba(255,255,255,.25)}.pg-formula-equation-note{position:relative;margin-top:14px;font-size:var(--fs-small);line-height:var(--lh-body);color:var(--white-50);max-width:720px}.pg-formula-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.pg-formula-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;padding:24px;transition:border-color .2s,background .2s}.pg-formula-card:hover{border-color:var(--white-15);background:var(--bg-card-hover)}.pg-formula-step{font-size:var(--fs-micro);letter-spacing:1.5px;text-transform:uppercase;color:var(--pg-accent);margin-bottom:10px;opacity:.7}.pg-formula-step,.pg-formula-title{font-family:var(--font-mono);font-weight:600}.pg-formula-title{font-size:16px;letter-spacing:-.2px;color:var(--text);margin-bottom:8px}.pg-formula-desc{font-size:15px;font-weight:300;line-height:var(--lh-body);color:var(--white-50);margin-bottom:16px}.pg-formula-examples{display:flex;flex-wrap:wrap;gap:6px}.pg-formula-tag{font-family:var(--font-mono);font-size:var(--fs-small);line-height:1.45;padding:6px 10px;border-radius:4px;background:var(--white-4);border:1px solid var(--white-6);color:var(--white-70)}.pg-formula-grid--4{grid-template-columns:repeat(2,1fr)}.pg-example-box{background:var(--bg-card);border:1px solid var(--white-10);border-radius:12px;padding:24px;margin-top:32px}.pg-example-label{margin-bottom:12px;opacity:.7}.pg-example-prompt{font-family:var(--font-mono);font-size:var(--fs-small);line-height:1.85;color:var(--white-80);background:var(--white-4);border:1px solid var(--white-6);border-radius:8px;padding:16px}.pg-example-part{display:inline;padding:2px 0;border-bottom:1px dashed transparent}.pg-example-part-tag{display:inline-block;margin-right:6px;font-size:var(--fs-micro);font-weight:700;letter-spacing:.6px;text-transform:uppercase;padding:2px 6px;border-radius:3px;vertical-align:middle}.pg-example-part.is-subject .pg-example-part-tag{color:var(--green-accent);background:var(--green-dim);border:1px solid var(--green-border)}.pg-example-part.is-camera .pg-example-part-tag{color:#60a5fa;background:rgba(59,130,246,.12);border:1px solid rgba(59,130,246,.25)}.pg-example-part.is-environment .pg-example-part-tag{color:#34d399;background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.25)}.pg-example-part.is-lighting .pg-example-part-tag{color:#fbbf24;background:rgba(251,191,36,.1);border:1px solid rgba(251,191,36,.25)}.pg-example-part.is-audio .pg-example-part-tag,.pg-example-part.is-style .pg-example-part-tag{color:#c084fc;background:rgba(192,132,252,.1);border:1px solid rgba(192,132,252,.25)}.pg-compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.pg-compare-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;padding:28px}.pg-compare-card.is-image-to-video{border-color:rgba(59,130,246,.3)}.pg-compare-card.is-t2v{border-color:rgba(0,232,122,.3)}.pg-compare-badge{display:inline-flex;font-family:var(--font-mono);font-size:var(--fs-micro);font-weight:600;letter-spacing:1px;text-transform:uppercase;padding:4px 10px;border-radius:4px;margin-bottom:16px}.pg-compare-badge.is-image-to-video{color:#3b82f6;background:rgba(59,130,246,.12);border:1px solid rgba(59,130,246,.3)}.pg-compare-badge.is-t2v{color:var(--green-accent);background:var(--green-dim);border:1px solid var(--green-border)}.pg-compare-title{font-family:var(--font-mono);font-size:16px;font-weight:600;letter-spacing:-.2px;color:var(--text);margin-bottom:12px}.pg-compare-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.pg-compare-list li{font-size:15px;line-height:var(--lh-body);color:var(--white-60);padding-left:20px;position:relative}.pg-compare-list li:before{content:"→";position:absolute;left:0;color:var(--white-30)}.pg-keyword-section{margin-bottom:16px;padding:20px 24px;background:var(--bg-card);border:1px solid var(--white-10);border-radius:12px;transition:border-color .2s}.pg-keyword-section:hover{border-color:var(--white-15)}.pg-keyword-section:last-child{margin-bottom:0}.pg-keyword-h3{font-family:var(--font-mono);font-size:16px;font-weight:600;letter-spacing:-.2px;color:var(--text);margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--white-6)}.pg-keyword-cloud{display:flex;flex-wrap:wrap;gap:8px}.pg-keyword-tag{font-family:var(--font-mono);font-size:var(--fs-small);padding:6px 12px;border-radius:6px;background:var(--white-4);border:1px solid var(--white-6);color:var(--white-70);cursor:pointer;transition:all .2s}.pg-keyword-tag:hover{background:var(--accent-dim);border-color:var(--accent-border);color:var(--pg-accent)}.pg-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px;border-bottom:1px solid var(--white-6);padding-bottom:16px}.pg-tab{font-family:var(--font-mono);font-size:var(--fs-small);font-weight:500;padding:8px 16px;border-radius:6px;background:transparent;border:1px solid var(--white-10);color:var(--white-50);cursor:pointer;transition:all .2s}.pg-tab:hover{background:var(--white-4);color:var(--white-80)}.pg-tab.active{background:var(--accent-dim);border-color:var(--accent-border);color:var(--pg-accent)}.pg-prompt-card,.pg-prompt-grid{display:flex;flex-direction:column;gap:12px}.pg-prompt-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:10px;padding:20px;transition:border-color .2s}.pg-prompt-card:hover{border-color:var(--white-15)}.pg-prompt-text{font-family:var(--font-mono);font-size:var(--fs-small);line-height:var(--lh-body);color:var(--white-80)}.pg-prompt-footer{display:flex;align-items:center;justify-content:space-between;gap:12px}.pg-prompt-mode{font-family:var(--font-mono);font-size:var(--fs-micro);font-weight:600;letter-spacing:.5px;text-transform:uppercase;padding:3px 8px;border-radius:3px}.pg-prompt-mode.is-image-to-video{color:#3b82f6;background:rgba(59,130,246,.12);border:1px solid rgba(59,130,246,.25)}.pg-prompt-mode.is-t2v{color:var(--green-accent);background:var(--green-dim);border:1px solid var(--green-border)}.pg-copy-btn{font-family:var(--font-mono);font-size:var(--fs-label);font-weight:500;padding:6px 12px;border-radius:5px;background:var(--white-4);border:1px solid var(--white-10);color:var(--white-60);cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:5px}.pg-copy-btn:hover{background:var(--accent-dim);border-color:var(--accent-border);color:var(--pg-accent)}.pg-copy-btn svg{width:12px;height:12px}.pg-bvg-grid{display:flex;flex-direction:column;gap:24px}.pg-bvg-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;overflow:hidden}.pg-bvg-header{padding:16px 20px;background:var(--white-4);border-bottom:1px solid var(--white-6)}.pg-bvg-scenario{font-family:var(--font-mono);font-size:var(--fs-small);font-weight:600;color:var(--text)}.pg-bvg-body{display:grid;grid-template-columns:1fr 1fr}.pg-bvg-side{padding:20px}.pg-bvg-side.is-bad{background:rgba(239,68,68,.03);border-right:1px solid var(--white-6)}.pg-bvg-side.is-good{background:rgba(0,232,122,.03)}.pg-bvg-label{display:inline-flex;align-items:center;gap:5px;font-family:var(--font-mono);font-size:var(--fs-micro);font-weight:600;letter-spacing:1px;text-transform:uppercase;margin-bottom:10px}.pg-bvg-label.is-bad{color:#ef4444}.pg-bvg-label.is-good{color:var(--green-accent)}.pg-bvg-label svg{width:12px;height:12px}.pg-bvg-prompt{font-family:var(--font-mono);font-size:var(--fs-small);line-height:var(--lh-body);color:var(--white-70)}.pg-bvg-footer{padding:14px 20px;background:var(--white-4);border-top:1px solid var(--white-6)}.pg-bvg-improvement{font-size:var(--fs-small);line-height:var(--lh-body);color:var(--white-50)}.pg-bvg-improvement strong{color:var(--pg-accent);font-weight:500}.pg-mistakes-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.pg-mistake-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;padding:24px;display:flex;flex-direction:column;gap:12px}.pg-mistake-num{font-size:var(--fs-micro);letter-spacing:1px;color:var(--pg-red);text-transform:uppercase}.pg-mistake-num,.pg-mistake-title{font-family:var(--font-mono);font-weight:600}.pg-mistake-title{font-size:16px;letter-spacing:-.2px;color:var(--text)}.pg-mistake-desc{color:var(--white-50)}.pg-mistake-desc,.pg-mistake-fix{font-size:15px;line-height:var(--lh-body)}.pg-mistake-fix{color:var(--green-accent);padding:12px;background:var(--green-dim);border:1px solid var(--green-border);border-radius:6px}.pg-builder{background:var(--bg-card);border:1px solid var(--white-10);border-radius:16px;overflow:hidden}.pg-builder-body{display:grid;grid-template-columns:1fr 1fr;min-height:400px}.pg-builder-controls{padding:28px;border-right:1px solid var(--white-6);display:flex;flex-direction:column;gap:20px}.pg-builder-field{display:flex;flex-direction:column;gap:8px}.pg-builder-label{font-family:var(--font-mono);font-size:var(--fs-label);font-weight:500;letter-spacing:1px;color:var(--pg-accent);opacity:.8}.pg-builder-select{width:100%;background:var(--white-4);border:1px solid var(--white-10);border-radius:6px;color:var(--text);font-family:var(--font-mono);font-size:12px;padding:10px 12px;outline:none;cursor:pointer;transition:border-color .2s;-webkit-appearance:none}.pg-builder-select:focus{border-color:var(--accent-border)}.pg-builder-select option{background:var(--bg-deep)}.pg-builder-input{width:100%;background:var(--white-4);border:1px solid var(--white-10);border-radius:6px;color:var(--text);font-family:var(--font-mono);font-size:12px;padding:10px 12px;outline:none;transition:border-color .2s}.pg-builder-input:focus{border-color:var(--accent-border)}.pg-builder-input::placeholder{color:var(--white-30)}.pg-builder-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.pg-builder-preview{padding:28px;background:var(--bg-inset);display:flex;flex-direction:column;gap:16px}.pg-builder-preview-label{font-family:var(--font-mono);font-size:var(--fs-label);font-weight:500;letter-spacing:1px;text-transform:uppercase;color:var(--pg-accent);opacity:.6}.pg-builder-output{flex:1;background:var(--white-4);border:1px solid var(--white-6);border-radius:10px;padding:20px;font-family:var(--font-mono);font-size:var(--fs-small);line-height:var(--lh-body);color:var(--white-80);min-height:200px}.pg-builder-actions{display:flex;gap:12px}.pg-callout{background:var(--accent-dim);border:1px solid var(--accent-border);border-radius:10px;padding:18px 22px;margin-top:24px}.pg-callout--spaced{margin-top:32px}.pg-callout-title{font-family:var(--font-mono);font-size:var(--fs-small);font-weight:600;color:var(--pg-accent);margin-bottom:8px;display:flex;align-items:center;gap:6px}.pg-callout-title svg{width:14px;height:14px}.pg-callout-text{font-size:15px;line-height:var(--lh-body);color:var(--white-70)}.pg-callout-text strong{color:var(--white-80);font-weight:500}.pg-divider{height:1px;background:linear-gradient(90deg,transparent,var(--white-10) 25%,var(--white-10) 75%,transparent)}.pg-rules-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.pg-rule-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;padding:24px}.pg-rule-card:last-child{grid-column:1/-1}.pg-rule-num{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;background:var(--accent-dim);border:1px solid var(--accent-border);font-size:var(--fs-micro);font-weight:700;color:var(--pg-accent);margin-bottom:12px}.pg-rule-num,.pg-rule-title{font-family:var(--font-mono)}.pg-rule-title{font-size:16px;font-weight:600;color:var(--text);margin-bottom:8px}.pg-rule-body{font-size:15px;line-height:var(--lh-body);color:var(--white-60)}.pg-official-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.pg-official-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;padding:24px;display:flex;flex-direction:column;gap:16px}.pg-official-type{font-family:var(--font-mono);font-size:var(--fs-micro);font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--pg-accent)}.pg-camera-table-wrap,.pg-intensity-table-wrap{overflow-x:auto;border:1px solid var(--white-6);border-radius:12px;background:var(--bg-card)}.pg-camera-table,.pg-intensity-table{width:100%;border-collapse:collapse;font-size:15px}.pg-camera-table th,.pg-intensity-table th{font-family:var(--font-mono);font-size:var(--fs-small);font-weight:600;text-align:left;padding:14px 20px;background:var(--white-4);border-bottom:1px solid var(--white-6);color:var(--white-70)}.pg-camera-table td,.pg-intensity-table td{padding:14px 20px;border-bottom:1px solid var(--white-6);color:var(--white-60);line-height:var(--lh-body)}.pg-camera-table tr:last-child td,.pg-intensity-table tr:last-child td{border-bottom:none}.pg-camera-term{font-family:var(--font-mono);font-weight:600;color:var(--text);white-space:nowrap}.pg-intensity-weak{color:var(--white-40)}.pg-intensity-strong,.pg-intensity-weak{font-family:var(--font-mono);font-size:var(--fs-small)}.pg-intensity-strong{color:var(--pg-accent)}.pg-audio-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:24px}.pg-audio-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;padding:20px}.pg-audio-category{font-family:var(--font-mono);font-size:15px;font-weight:600;color:var(--text);margin-bottom:10px}.pg-audio-examples{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}.pg-audio-examples li{font-size:var(--fs-small);color:var(--white-60);line-height:var(--lh-body)}.pg-audio-full-example{white-space:pre-line}.pg-audio-copy{margin-top:12px}.pg-tips-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.pg-tip-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;padding:20px}.pg-tip-title{font-family:var(--font-mono);font-size:15px;font-weight:600;color:var(--text);margin-bottom:8px}.pg-tip-body{font-size:var(--fs-small);line-height:var(--lh-body);color:var(--white-60)}.pg-copy-toast{position:fixed;bottom:24px;right:24px;background:var(--accent-dim);border:1px solid var(--accent-border);border-radius:8px;padding:12px 18px;font-family:var(--font-mono);font-size:13px;color:var(--text);z-index:100}.pg-usecase-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.pg-usecase-card{background:var(--bg-card);border:1px solid var(--white-6);border-radius:12px;padding:24px;transition:border-color .2s,box-shadow .2s}.pg-usecase-card:hover{border-color:var(--white-10);box-shadow:0 4px 24px rgba(0,0,0,.25)}.pg-usecase-icon{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:var(--accent-dim);border:1px solid var(--accent-border);margin-bottom:16px}.pg-usecase-icon svg{width:20px;height:20px;color:var(--text,#ffffff)}.pg-usecase-title{font-family:var(--font-mono);font-size:17px;font-weight:600;color:var(--text);margin-bottom:10px}.pg-usecase-desc{color:var(--white-60)}.pg-audio-tip,.pg-usecase-desc{font-size:14px;line-height:var(--lh-body)}.pg-audio-tip{margin-bottom:20px;padding:14px 18px;background:var(--accent-dim);border:1px solid var(--accent-border);border-radius:10px;color:var(--white-70)}.pg-audio-tip code{font-family:var(--font-mono);background:var(--white-6);padding:2px 6px;border-radius:4px;font-size:13px;color:var(--pg-green)}@media (max-width:960px){.pg-guide .page-layout{grid-template-columns:1fr}.pg-guide .sidebar-column{display:none}.pg-audio-grid,.pg-compare-grid,.pg-official-grid,.pg-rules-grid,.pg-tips-grid,.pg-usecase-grid{grid-template-columns:1fr}.pg-rule-card:last-child{grid-column:auto}.pg-formula-equation{padding:22px 20px}.pg-formula-equation-row{gap:8px 4px}.pg-formula-equation-chip{padding:8px 12px;font-size:var(--fs-small)}.pg-formula-grid,.pg-formula-grid--4{grid-template-columns:repeat(2,1fr)}.pg-bvg-body,.pg-compare-grid{grid-template-columns:1fr}.pg-bvg-side.is-bad{border-right:none;border-bottom:1px solid var(--white-6)}.pg-builder-body,.pg-mistakes-grid{grid-template-columns:1fr}.pg-builder-controls{border-right:none;border-bottom:1px solid var(--white-6)}}@media (max-width:640px){.pg-formula-equation-segment{width:100%;justify-content:flex-start}.pg-formula-equation-op{display:none}.pg-formula-equation-chip{width:100%;justify-content:flex-start}.pg-hero{padding:32px 0 48px}.pg-sec{padding-top:var(--section-py);padding-bottom:var(--section-py)}.pg-builder-row,.pg-formula-grid,.pg-formula-grid--4{grid-template-columns:1fr}.pg-builder-controls,.pg-builder-preview{padding:20px}.pg-guide .pg-cta{padding:28px 22px}}.pg-guide .pg-cta-section{padding-top:0;border-top:none}.pg-guide .pg-cta{position:relative;text-align:center;padding:40px 36px;border-radius:16px;border:1px solid var(--accent-border);background:linear-gradient(135deg,rgba(255,255,255,.06) 0,rgba(255,255,255,.02) 100%),var(--bg-card);overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,255,255,.04),0 24px 64px rgba(0,0,0,.35)}.pg-guide .pg-cta:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--pg-accent),transparent);opacity:.5}.pg-guide .pg-cta:after{content:"";position:absolute;inset:-40% -20% auto;height:120%;pointer-events:none;background:radial-gradient(ellipse 70% 55% at 50% 0,rgba(0,232,122,.1) 0,transparent 68%)}.pg-guide .pg-cta .footer-cta-actions,.pg-guide .pg-cta-desc,.pg-guide .pg-cta-footnote,.pg-guide .pg-cta-label,.pg-guide .pg-cta-title{position:relative;z-index:1}.pg-guide .pg-cta-label{margin-bottom:14px}.pg-guide .pg-cta-title{font-family:var(--font-mono);font-size:clamp(26px,3.5vw,38px);line-height:var(--lh-heading);letter-spacing:-1px;font-weight:600;color:var(--text);margin-bottom:14px}.pg-guide .pg-cta-title .acc{color:var(--pg-accent);text-shadow:0 0 32px rgba(0,232,122,.25)}.pg-guide .pg-cta-desc{max-width:560px;margin:0 auto 28px;font-size:16px;font-weight:300;line-height:var(--lh-body);color:var(--white-50)}.pg-guide .pg-cta .footer-cta-actions{margin-bottom:20px}.pg-guide .pg-cta .footer-cta-actions .btn-primary{text-transform:none;letter-spacing:.02em}.pg-guide .pg-cta-footnote{font-size:var(--fs-small);line-height:var(--lh-body);color:var(--white-30);margin:0}.pg-guide .pg-cta-link{color:var(--white-60);text-decoration:none;transition:color .2s}.pg-guide .pg-cta-link:hover{color:var(--pg-accent)}.pg-guide .pg-demo-video{position:relative;width:100%;border-radius:12px;overflow:hidden;border:1px solid var(--white-10);background:var(--bg-card);aspect-ratio:16/9}.pg-guide .pg-demo-video-sound{opacity:1}.pg-guide .pg-demo-video--in-section{margin-top:24px}.pg-guide .pg-demo-video-sec{padding-top:0;padding-bottom:0;border-top:none}.pg-guide .pg-demo-video-sec .pg-demo-video{margin-top:0}.pg-guide .pg-demo-video-media{position:absolute;inset:0;background:#111114}.pg-guide .pg-demo-video-el,.pg-guide .pg-demo-video-poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.pg-guide .pg-demo-video-poster{z-index:0;transition:opacity .3s ease}.pg-guide .pg-demo-video-poster.is-hidden{opacity:0;pointer-events:none}.pg-guide .pg-demo-video-el{z-index:1}