.vs-hub{--vs-accent:#2563eb}.vs-hero{background:linear-gradient(#eff6ff,#fff);border-bottom:1px solid #e2e8f0;padding:28px 0 24px}.vs-hero-inner{max-width:960px;margin:0 auto;padding:0 16px}.vs-hero-crumbs{align-items:center;gap:6px;margin-bottom:14px;font-size:12px;display:flex}.vs-hero-crumbs a{color:#2563eb;text-decoration:none}.vs-hero-crumbs a:hover{text-decoration:underline}.vs-hero-crumbs .sep{color:#94a3b8}.vs-hero-crumbs .here{color:#334155;font-weight:600}.vs-hero-trust{color:#1d4ed8;background:#dbeafe;border-radius:9999px;align-items:center;gap:6px;margin-bottom:14px;padding:4px 12px;font-size:12px;font-weight:600;display:inline-flex}.vs-hero-trust svg{width:13px;height:13px}.vs-hero-main{align-items:flex-start;gap:18px;display:flex}.vs-hero-emoji{flex-shrink:0;margin-top:4px;font-size:40px;line-height:1}.vs-hero h1{color:#0f172a;letter-spacing:-.025em;margin-bottom:14px;font-size:36px;font-weight:800;line-height:1.1}.vs-hero p{color:#475569;line-height:1.7}.vs-hero p.lead{margin-bottom:10px;font-size:15.5px}.vs-hero p.sub{color:#64748b;font-size:14px}.vs-hero p strong{color:#0f172a}.vs-hero-stats{background:#e2e8f0;border:1px solid #e2e8f0;border-radius:14px;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:24px;display:grid;overflow:hidden}.vs-hero-stat{text-align:left;background:#fff;padding:14px 16px}.vs-hero-stat-num{letter-spacing:-.02em;font-size:22px;font-weight:800;line-height:1}.vs-hero-stat-label{color:#0f172a;margin-top:4px;font-size:12px;font-weight:600}.vs-hero-stat-sub{color:#94a3b8;margin-top:2px;font-size:11px}.vs-hero-stat--link{color:inherit;cursor:pointer;text-decoration:none;transition:background .15s}.vs-hero-stat--link:hover{background:#f5effe}.vs-hero-stat--link .vs-hero-stat-sub{color:#7c3aed;font-weight:700}.vs-section{margin:0 0 56px}.vs-section[id]{scroll-margin-top:120px}.vs-fade-in{animation:.24s forwards vs-fade-in}@keyframes 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transparent);border-radius:2px;width:44px;height:3px;position:absolute;bottom:0;left:0}.vs-section-meta{flex-wrap:wrap;gap:8px;display:flex}.vs-section-meta-badge{color:#475569;background:#fff;border:1px solid #e2e8f0;border-radius:9999px;align-items:center;gap:5px;padding:5px 10px;font-size:11.5px;font-weight:600;display:inline-flex}.vs-section-sub{color:#64748b;max-width:720px;margin-top:10px;font-size:14px;line-height:1.6}.vs-section-sub strong{color:#334155}.vs-svompt-tabs{flex-wrap:wrap;gap:8px;margin-bottom:18px;display:flex}.vs-svompt-tab{color:#475569;cursor:pointer;background:#fff;border:1.5px solid #e2e8f0;border-radius:9999px;align-items:center;gap:7px;padding:7px 14px;font-size:13px;font-weight:600;transition:background-color .15s,color .15s,border-color .15s;display:inline-flex}.vs-svompt-tab:hover{border-color:#cbd5e1}.vs-svompt-tab.is-active{color:#fff;background:#2563eb;border-color:#2563eb;box-shadow:0 4px 10px -2px #2563eb59}.vs-svompt-tab-cefr{background:#0f172a12;border-radius:9999px;padding:1px 6px;font-size:10px;font-weight:800}.vs-svompt-tab.is-active .vs-svompt-tab-cefr{background:#ffffff38}.vs-svompt-board{background:radial-gradient(at 50% 0,#f0f9ff 0%,#fafbfc 62%);border:1px solid #e2e8f0;border-radius:16px;align-items:stretch;gap:4px;padding:16px;display:flex;box-shadow:inset 0 1px #fffc,0 1px 2px #0f172a0a}.vs-svompt-arrow{color:#cbd5e1;flex:none;align-self:center;font-size:16px;font-weight:700}.vs-svompt-slot{border:1px solid #e2e8f0;border-top:2px solid var(--vs-slot);background:#fff;border-radius:10px;flex-direction:column;flex:1 1 0;min-width:90px;display:flex;overflow:hidden}.vs-svompt-slot.is-empty{opacity:.85;background:#fafbfc}.vs-svompt-slot-head{text-align:center;border-bottom:1px solid #eef2f6;flex-direction:column;align-items:center;gap:1px;padding:8px 6px;display:flex}.vs-svompt-slot-icon{font-size:16px;line-height:1}.vs-svompt-slot-cs{color:var(--vs-slot);letter-spacing:-.01em;font-size:11.5px;font-weight:800}.vs-svompt-slot-q{color:#94a3b8;font-size:9.5px}.vs-svompt-slot-cell{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:6px;min-height:64px;padding:12px 6px;display:flex}.vs-svompt-slot-empty{color:#cbd5e1;font-size:18px;font-weight:700}.vs-svompt-token{border:1.5px solid color-mix(in srgb, var(--vs-slot) 30%, #fff);background:color-mix(in srgb, var(--vs-slot) 10%, #fff);color:color-mix(in srgb, var(--vs-slot) 78%, #0f172a);cursor:pointer;border-radius:8px;flex-direction:column;align-items:center;gap:1px;padding:6px 11px;font-size:13px;font-weight:700;line-height:1.1;transition:transform .15s,box-shadow .15s,background .15s,opacity .15s;display:inline-flex}.vs-svompt-token:hover{background:color-mix(in srgb, var(--vs-slot) 18%, #fff);transform:translateY(-1px)}.vs-svompt-token.is-selected{background:color-mix(in srgb, var(--vs-slot) 16%, #fff);box-shadow:0 0 0 2px var(--vs-slot), 0 6px 14px -6px color-mix(in srgb, var(--vs-slot) 50%, transparent)}.vs-svompt-token.is-dim{opacity:.4}.vs-svompt-token-word{white-space:nowrap}.vs-svompt-token-tag{text-transform:uppercase;letter-spacing:.04em;color:#94a3b8;font-size:8.5px;font-weight:700}.vs-svompt-info{min-height:62px;margin-top:14px}.vs-svompt-info-hint{color:#94a3b8;background:#f8fafc;border:1px dashed #e2e8f0;border-radius:12px;padding:14px 16px;font-size:13px;font-style:italic}.vs-svompt-info-card{background:color-mix(in srgb, var(--vs-slot) 6%, #fff);border:1px solid color-mix(in srgb, var(--vs-slot) 22%, #e2e8f0);border-left:4px solid var(--vs-slot);border-radius:12px;padding:14px 16px}.vs-svompt-info-head{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:6px;display:flex}.vs-svompt-info-icon{font-size:16px}.vs-svompt-info-word{color:#0f172a;font-size:16px;font-weight:800}.vs-svompt-info-slot{color:var(--vs-slot);align-items:center;gap:6px;font-size:12px;font-weight:700;display:inline-flex}.vs-svompt-info-tagpill{text-transform:uppercase;letter-spacing:.04em;background:color-mix(in srgb, var(--vs-slot) 14%, #fff);color:var(--vs-slot);border-radius:9999px;padding:1px 6px;font-size:9.5px}.vs-svompt-info-cs{color:#475569;margin-bottom:4px;font-size:12.5px}.vs-svompt-info-why{color:#334155;font-size:13px;line-height:1.5}.vs-svompt-cz{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:12px;margin-top:14px;padding:14px 16px}.vs-svompt-cz-label{color:#15803d;align-items:center;gap:6px;margin-bottom:8px;font-size:12px;font-weight:700;display:flex}.vs-svompt-cz-items{flex-wrap:wrap;gap:8px;margin-bottom:8px;display:flex}.vs-svompt-cz-item{color:#0f172a;background:#fff;border:1px solid #bbf7d0;border-radius:9999px;align-items:center;gap:6px;padding:5px 11px;font-size:13px;display:inline-flex}.vs-svompt-cz-ok{color:#16a34a;font-weight:800}.vs-svompt-cz-note{color:#475569;font-size:12px;line-height:1.5}.vs-svompt-cz-note strong{color:#15803d}.vs-svompt-mistake{background:#fef2f2;border:1px solid #fecaca;border-radius:12px;margin-top:14px;padding:14px 16px}.vs-svompt-mistake-head{color:#b91c1c;letter-spacing:.02em;align-items:center;gap:6px;margin-bottom:8px;font-size:12px;font-weight:800;display:flex}.vs-svompt-mistake-wrong{color:#dc2626;align-items:center;gap:7px;margin-bottom:6px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;font-weight:700;display:flex}.vs-svompt-x{font-weight:800}.vs-svompt-mistake-note{color:#475569;margin-bottom:8px;font-size:12.5px;line-height:1.5}.vs-svompt-mistake-fix{color:#15803d;align-items:center;gap:7px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;font-weight:700;display:flex}.vs-svompt-check{color:#16a34a;font-weight:800}.vs-svompt-cta{color:#fff;background:linear-gradient(135deg,#2563eb,#1d4ed8);border-radius:10px;align-items:center;gap:8px;margin-top:18px;padding:11px 18px;font-size:13.5px;font-weight:700;text-decoration:none;transition:transform .15s,box-shadow .15s;display:inline-flex}.vs-svompt-cta:hover{transform:translateY(-1px);box-shadow:0 10px 22px -8px #2563eb8c}.vs-jumpnav{z-index:30;-webkit-backdrop-filter:blur(8px);background:#f8fafceb;border-bottom:1px solid #e2e8f0;position:sticky;top:64px}.vs-jumpnav-inner{scrollbar-width:none;gap:8px;max-width:1152px;margin:0 auto;padding:10px 16px;display:flex;overflow-x:auto}.vs-jumpnav-inner::-webkit-scrollbar{display:none}.vs-jumpnav-pill{color:#475569;white-space:nowrap;cursor:pointer;background:#fff;border:1px solid #e2e8f0;border-radius:9999px;flex-shrink:0;align-items:center;gap:6px;padding:6px 12px;font-size:12px;font-weight:600;text-decoration:none;transition:background-color .15s,color .15s,border-color .15s;display:inline-flex}.vs-jumpnav-pill:hover{color:#1e293b;border-color:#cbd5e1}.vs-jumpnav-pill.is-active{color:#fff;background:#2563eb;border-color:#2563eb}.vs-svompt-key{background:#fff;border:1px solid #e2e8f0;border-radius:12px;flex-wrap:wrap;align-items:center;gap:8px 10px;margin-bottom:18px;padding:12px 14px;display:flex}.vs-svompt-key-label{letter-spacing:.1em;color:#0f172a;margin-right:2px;font-size:13px;font-weight:800}.vs-svompt-key-item{align-items:center;gap:6px;display:inline-flex}.vs-svompt-key-letter{color:#fff;background:var(--vs-slot);border-radius:6px;justify-content:center;align-items:center;width:22px;height:22px;font-size:12px;font-weight:800;display:inline-flex}.vs-svompt-key-cs{color:#475569;font-size:12px;font-weight:600}.vs-svompt-sentence{flex-wrap:wrap;align-items:baseline;gap:2px 8px;margin-bottom:14px;font-size:17px;font-weight:700;display:flex}.vs-svompt-sentence-label{color:#94a3b8;text-transform:uppercase;letter-spacing:.06em;align-self:center;font-size:10.5px;font-weight:700}.vs-tf-intro{background:color-mix(in srgb, var(--vs-accent) 6%, #fff);border:1px solid color-mix(in srgb, var(--vs-accent) 22%, #e2e8f0);border-left:4px solid var(--vs-accent);color:#334155;border-radius:12px;align-items:flex-start;gap:12px;margin-bottom:18px;padding:14px 16px;font-size:13.5px;line-height:1.55;display:flex}.vs-tf-intro-icon{flex-shrink:0;font-size:20px;line-height:1.4}.vs-tf-intro strong{color:#0f172a}.vs-tf-tabs{flex-wrap:wrap;gap:8px;margin-bottom:18px;display:flex}.vs-tf-tab{color:#475569;cursor:pointer;background:#fff;border:1.5px solid #e2e8f0;border-radius:9999px;align-items:center;gap:7px;padding:7px 14px;font-size:13px;font-weight:600;transition:background-color .15s,color .15s,border-color .15s;display:inline-flex}.vs-tf-tab:hover{border-color:#cbd5e1}.vs-tf-tab.is-active{color:#fff;background:#7c3aed;border-color:#7c3aed;box-shadow:0 4px 10px -2px #7c3aed59}.vs-tf-tab-cefr{background:#0f172a12;border-radius:9999px;padding:1px 6px;font-size:10px;font-weight:800}.vs-tf-tab.is-active .vs-tf-tab-cefr{background:#ffffff38}.vs-tf-rows{flex-direction:column;gap:8px;display:flex}.vs-tf-row{background:#fff;border:1px solid #e2e8f0;border-radius:12px;grid-template-columns:130px 1fr;align-items:center;gap:12px;padding:12px 16px;display:grid}.vs-tf-row--aff{background:#f8fafc}.vs-tf-row-label{color:#64748b;align-items:center;gap:6px;font-size:12px;font-weight:700;display:inline-flex}.vs-tf-row-sentence{color:#0f172a;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:15.5px;font-weight:600}.vs-tf-op{color:#fff;background:#7c3aed;border-radius:6px;padding:1px 8px;font-weight:800;display:inline-block}.vs-tf-row--neg .vs-tf-op{background:#dc2626}.vs-tf-ghost{color:#94a3b8;background:#f1f5f9;border:1px dashed #cbd5e1;border-radius:6px;margin-left:6px;padding:2px 8px;font-family:system-ui,sans-serif;font-size:11px;font-weight:600}.vs-tf-full{color:#94a3b8;font-family:system-ui,sans-serif;font-size:12px;font-weight:600}.vs-tf-rule{color:#334155;background:#f7f3fe;border:1px solid #cec5ef;border-radius:12px;margin-top:14px;padding:13px 16px;font-size:13px;line-height:1.55}.vs-tf-rule-op{color:#7c3aed;margin-right:6px;font-weight:800;display:inline-block}.vs-tf-rule strong{color:#0f172a}.vs-tf-cz{color:#64748b;margin-top:10px;padding:0 4px;font-size:12.5px}.vs-tf-ctas{flex-wrap:wrap;gap:10px;margin-top:18px;display:flex}.vs-tf-cta{color:#7c3aed;background:#faf5ff;border:1px solid #e9d5ff;border-radius:10px;align-items:center;gap:6px;padding:9px 15px;font-size:13px;font-weight:700;text-decoration:none;transition:transform .15s,border-color .15s,background .15s;display:inline-flex}.vs-tf-cta:hover{background:#f3e8ff;border-color:#d8b4fe;transform:translateY(-1px)}.vs-tf-cta--primary{color:#fff;background:linear-gradient(135deg,#7c3aed,#6d28d9);border-color:#0000}.vs-tf-cta--primary:hover{background:linear-gradient(135deg,#6d28d9,#5b21b6)}.vs-cond-tree{background:radial-gradient(at 50% 0,#fffbeb 0%,#fafbfc 62%);border:1px solid #fde68a;border-radius:16px;margin-bottom:24px;padding:18px}.vs-cond-tree-q{color:#0f172a;align-items:center;gap:8px;margin-bottom:12px;font-size:14.5px;font-weight:700;display:flex}.vs-cond-tree-qnum{color:#fff;background:#d97706;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:12px;font-weight:800;display:inline-flex}.vs-cond-tree-opts{flex-wrap:wrap;gap:10px;display:flex}.vs-cond-tree-opt{text-align:left;cursor:pointer;background:#fff;border:1.5px solid #e2e8f0;border-radius:12px;flex-direction:column;flex:200px;gap:2px;padding:12px 14px;transition:border-color .15s,box-shadow .15s,transform .15s;display:flex}.vs-cond-tree-opt:hover{border-color:#fbbf24;transform:translateY(-1px)}.vs-cond-tree-opt.is-active{background:#fffbeb;border-color:#d97706;box-shadow:0 0 0 2px #d9770640}.vs-cond-tree-opt-label{color:#0f172a;font-size:14px;font-weight:700}.vs-cond-tree-opt-sub{color:#94a3b8;font-size:12px}.vs-cond-tree-branch{border-top:1px dashed #fde68a;margin-top:16px;padding-top:16px}.vs-cond-tree-result{color:#fff;background:linear-gradient(135deg,#d97706,#b45309);border-radius:12px;margin-top:16px;padding:12px 16px;font-size:15px;font-weight:700}.vs-cond-result-arrow{margin-right:4px;font-weight:800}.vs-cond-grid{grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:24px;display:grid}.vs-cond-card{border:1px solid #e2e8f0;border-top:3px solid var(--vs-c);background:#fff;border-radius:14px;padding:16px 18px;transition:box-shadow .2s,transform .2s}.vs-cond-card.is-highlight{box-shadow:0 0 0 3px color-mix(in srgb, var(--vs-c) 35%, transparent), 0 16px 30px -12px color-mix(in srgb, var(--vs-c) 40%, transparent);transform:translateY(-2px)}.vs-cond-card-head{align-items:center;gap:12px;margin-bottom:10px;display:flex}.vs-cond-card-n{background:linear-gradient(135deg, var(--vs-c), color-mix(in srgb, var(--vs-c) 72%, #000));color:#fff;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:18px;font-weight:800;display:inline-flex}.vs-cond-card-titles{flex:1;min-width:0}.vs-cond-card-name{color:#0f172a;font-size:15.5px;font-weight:800}.vs-cond-card-en{color:#94a3b8;font-size:11.5px;font-style:italic}.vs-cond-card-badge{background:color-mix(in srgb, var(--vs-c) 12%, #fff);color:var(--vs-c);white-space:nowrap;border-radius:9999px;padding:3px 8px;font-size:10px;font-weight:700}.vs-cond-card-when{color:#475569;margin-bottom:10px;font-size:13px;line-height:1.5}.vs-cond-card-formula{color:#1e293b;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:7px;margin-bottom:10px;padding:6px 10px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}.vs-cond-card-ex{border-top:1px dashed #e2e8f0;flex-direction:column;gap:1px;margin-bottom:10px;padding:8px 0;display:flex}.vs-cond-card-ex .en{color:#0f172a;font-size:14px;font-weight:700}.vs-cond-card-ex .cs{color:#64748b;font-size:12.5px}.vs-cond-card-mistake{color:#475569;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:8px 10px;font-size:12px;line-height:1.5}.vs-cond-x{color:#dc2626;font-weight:800}.vs-cond-mistake-wrong{color:#dc2626;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:700}.vs-cond-mistake-note{color:#64748b;margin-top:3px;display:block}.vs-cond-card-tipnote{color:#475569;background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;padding:8px 10px;font-size:12px;line-height:1.5}.vs-cond-compare{background:#fff;border:1px solid #e2e8f0;border-radius:14px;margin-bottom:18px;padding:16px 18px}.vs-cond-compare-head{color:#0f172a;align-items:center;gap:7px;margin-bottom:12px;font-size:13.5px;font-weight:700;display:flex}.vs-cond-compare-rows{flex-direction:column;gap:8px;display:flex}.vs-cond-compare-row{border-left:3px solid var(--vs-c);grid-template-columns:28px 1fr;grid-template-areas:"n en""n cs";gap:0 12px;padding:6px 0 6px 12px;display:grid}.vs-cond-compare-n{background:var(--vs-c);color:#fff;border-radius:7px;grid-area:n;justify-content:center;align-self:center;align-items:center;width:24px;height:24px;font-size:12px;font-weight:800;display:inline-flex}.vs-cond-compare-en{color:#0f172a;grid-area:en;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;font-weight:700}.vs-cond-compare-cs{color:#64748b;grid-area:cs;font-size:12.5px}.vs-faq{flex-direction:column;gap:10px;display:flex}.vs-faq-item{background:#fff;border:1px solid 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