[hidden]{display:none!important}

/* Product-center preview chrome remains separate from the public skin. */
.pc-preview{position:fixed;inset:0;z-index:90;background:rgba(12,16,20,.72);display:flex;flex-direction:column;padding:24px;gap:12px}.pc-preview[hidden]{display:none}.pc-preview-bar{width:min(1180px,100%);margin:0 auto;display:flex;align-items:center;gap:10px;color:#fff}.pc-preview-bar strong{margin-right:auto}.pc-preview-bar button{border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.12);color:#fff;border-radius:8px;padding:8px 11px;cursor:pointer}.pc-preview-bar button.on{background:var(--accent);color:#162016;border-color:var(--accent)}.pc-preview-notice{width:min(1180px,100%);margin:0 auto;color:#eef5df;font-size:12px;text-align:center}.pc-preview-frame{width:min(1180px,100%);min-width:960px;min-height:680px;overflow:auto;margin:0 auto;background:#f7f8f4;border-radius:14px;box-shadow:0 24px 80px rgba(0,0,0,.4)}.pc-select-note{width:min(1180px,100%);margin:0 auto;color:#fff;font-size:13px}.pc-preview-open{margin-left:10px}.pc-edit-context{display:flex;gap:8px;align-items:center;padding:8px 12px;background:var(--soft);border-radius:8px;font-size:12px;color:var(--muted)}

:root{--skin-canvas:#f2f3ff;--skin-surface:#ffffff;--skin-surface-soft:#e7e9fb;--skin-ink:#111431;--skin-ink-muted:#5c617c;--skin-line:#d6d9ed;--skin-accent:#5560e0;--skin-accent-strong:#4650c9;--skin-accent-soft:#e9eaff;--skin-accent-wash:rgba(85,96,224,.16);--skin-accent-ink:#ffffff;--skin-inverse:#101335;--skin-danger:#a24650;--skin-radius:14px;--skin-content:720px;--skin-shell:1200px;--skin-gutter:clamp(22px,5vw,72px);--skin-serif:Georgia,"Songti SC","Noto Serif CJK SC",serif;--skin-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB",sans-serif}
*{box-sizing:border-box}
html{background:var(--skin-canvas);scroll-behavior:smooth}
body{margin:0;background:var(--skin-canvas);color:var(--skin-ink);font-family:var(--skin-sans)}
button,input{font:inherit}
.sf-storefront{min-height:100vh;background:var(--skin-canvas);color:var(--skin-ink);font-family:var(--skin-sans);overflow:hidden}
.sf-storefront a{color:var(--skin-accent)}
.sf-section{position:relative;width:min(100%,var(--skin-shell));margin:0 auto;padding:clamp(66px,9vw,132px) var(--skin-gutter);border-bottom:1px solid var(--skin-line)}
.sf-section[data-section-id]{outline:0}
.sf-storefront[data-mode="preview"] .sf-section[role=button]{cursor:pointer}
.sf-storefront[data-mode="preview"] .sf-section[role=button]:focus-visible{outline:3px solid var(--skin-accent-wash);outline-offset:-3px}
.sf-section:first-child{padding-top:clamp(42px,6vw,82px)}
.sf-section:last-child{border-bottom:0}
.sf-heading-wrap{display:grid;gap:12px;max-width:var(--skin-content);margin-bottom:34px}
.sf-eyebrow,.sf-card-kicker,.sf-meta-label,.sf-fact-label,.sf-proof-kind,.sf-policy-label,.sf-media-kicker{font-size:11px;line-height:1.2;letter-spacing:.14em;text-transform:uppercase;color:var(--skin-accent);font-weight:750}
.sf-heading{margin:0;font-family:var(--skin-serif);font-size:clamp(34px,4.5vw,58px);font-weight:500;line-height:1.08;letter-spacing:-.035em;text-wrap:pretty}
.sf-section-intro,.sf-note,.sf-empty{max-width:var(--skin-content);color:var(--skin-ink-muted);line-height:1.75;font-size:15px}
.sf-empty{padding:18px 0;margin:0;border-top:1px dashed var(--skin-line)}

/* Hero: the only full-bleed image layer is an explicitly bound product asset. */
.sf-hero{padding-top:0!important;padding-bottom:0!important;min-height:680px;display:flex;flex-direction:column;border-bottom:0;background:var(--skin-canvas)}
.sf-hero-inner{position:relative;z-index:1;width:min(100%,var(--skin-shell));margin:0 auto;padding:clamp(58px,8vw,112px) var(--skin-gutter) 62px;display:grid;grid-template-columns:minmax(0,7fr) minmax(300px,5fr);gap:clamp(34px,7vw,110px);align-items:end}
.sf-hero-copy{min-width:0;display:flex;flex-direction:column;align-items:flex-start}
.sf-title{max-width:760px;margin:20px 0 22px;font-family:var(--skin-serif);font-size:clamp(52px,8vw,104px);font-weight:500;line-height:.98;letter-spacing:-.06em;text-wrap:balance}
.sf-subtitle{max-width:600px;margin:0;color:var(--skin-ink-muted);font-size:clamp(18px,2vw,23px);line-height:1.55;text-wrap:pretty}
.sf-hero-meta{display:flex;gap:10px;align-items:baseline;margin-top:32px;padding-top:14px;border-top:1px solid var(--skin-line);color:var(--skin-ink-muted);font-size:13px}
.sf-meta-value{color:var(--skin-ink);font-weight:650}
.sf-hero-media{width:min(100%,680px);margin-top:42px}
.sf-hero-media .sf-preview-item{padding:0;border:0;background:transparent}
.sf-hero-media .sf-preview-item-label{display:none}
.sf-hero-media-empty{min-height:260px;padding:34px!important;display:flex;flex-direction:column;justify-content:flex-end;gap:8px;border:1px dashed #bfc7bb!important;background:linear-gradient(135deg,rgba(255,253,248,.7),rgba(232,229,218,.82));border-radius:var(--skin-radius)}
.sf-media-empty-title{font-family:var(--skin-serif);font-size:26px;font-weight:500}
.sf-media-empty-note{color:var(--skin-ink-muted);font-size:13px}
.sf-purchase-card{width:100%;padding:clamp(24px,3vw,38px);border:1px solid rgba(18,23,20,.12);border-radius:var(--skin-radius);background:var(--skin-surface);box-shadow:0 22px 70px rgba(29,39,30,.12)}
.sf-card-kicker{display:block;margin-bottom:22px;color:var(--skin-ink-muted)}
.sf-price{font-size:clamp(34px,4vw,52px);line-height:1;font-weight:720;letter-spacing:-.045em;color:var(--skin-ink)}
.sf-price-compare{display:block;margin-bottom:9px;color:var(--skin-ink-muted);font-size:15px;font-weight:400;letter-spacing:0}
.sf-price-current{display:block}
.sf-delivery-note{margin:18px 0 0;color:var(--skin-ink-muted);font-size:14px;line-height:1.55}
.sf-quantity-label{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:22px;padding-top:16px;border-top:1px solid var(--skin-line);color:var(--skin-ink-muted);font-size:13px}
.sf-quantity-input{width:72px;padding:9px 10px;border:1px solid var(--skin-line);border-radius:9px;background:var(--skin-surface);color:var(--skin-ink);text-align:center}
.sf-quantity-input:focus{outline:3px solid var(--skin-accent-wash);border-color:var(--skin-accent)}
.sf-checkout-note{margin:14px 0 0;color:var(--skin-ink-muted);font-size:12px;line-height:1.5}
.sf-cta{display:inline-flex;align-items:center;justify-content:center;min-height:48px;margin-top:25px;padding:13px 22px;border:1px solid transparent;border-radius:10px;background:var(--skin-accent);color:var(--skin-accent-ink);font-weight:750;cursor:pointer;transition:transform .2s ease,background .2s ease,box-shadow .2s ease}
.sf-cta:hover:not(:disabled){transform:translateY(-2px);background:var(--skin-accent-strong);box-shadow:0 10px 24px rgba(85,96,224,.22)}
.sf-cta:focus-visible{outline:3px solid rgba(85,96,224,.28);outline-offset:3px}
.sf-cta:disabled{cursor:not-allowed;opacity:.55}
.sf-cta-compact{min-height:40px;margin-top:0;padding:9px 16px;font-size:13px}
.sf-card-footnote{margin:16px 0 0;color:var(--skin-ink-muted);font-size:12px;line-height:1.5}
.sf-hero-facts{position:relative;z-index:1;display:grid;grid-template-columns:repeat(3,1fr);width:min(100%,var(--skin-shell));margin:auto auto 0;padding:22px var(--skin-gutter);border-top:1px solid var(--skin-line)}
.sf-fact{display:grid;gap:7px;padding-right:20px;border-right:1px solid var(--skin-line)}
.sf-fact:last-child{padding-right:0;border-right:0;padding-left:20px}
.sf-fact:nth-child(2){padding-left:20px}
.sf-fact-value{font-size:13px;line-height:1.45;font-weight:600;overflow-wrap:anywhere}

/* Optional background treatments only activate when a real preview is bound. */
.sf-hero-with-background{isolation:isolate}
.sf-hero-background,.sf-hero-overlay{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.sf-hero-background{z-index:-2;object-fit:cover;opacity:.92}
.sf-hero-overlay{z-index:-1;background:transparent}
.sf-overlay-dark_35{background:rgba(16,21,18,.35)}.sf-overlay-dark_55{background:rgba(16,21,18,.55)}.sf-overlay-light_35{background:rgba(255,253,248,.35)}.sf-overlay-light_55{background:rgba(255,253,248,.55)}
.sf-hero-bg-ambient .sf-hero-background{filter:saturate(.76) blur(20px);transform:scale(1.06);opacity:.28}
.sf-hero-bg-ambient .sf-hero-inner{background:rgba(244,241,232,.64)}
.sf-hero-tone-light .sf-eyebrow,.sf-hero-tone-light .sf-title,.sf-hero-tone-light .sf-subtitle,.sf-hero-tone-light .sf-meta-value{color:#fffdf8}.sf-hero-tone-light .sf-subtitle,.sf-hero-tone-light .sf-meta-label{color:rgba(255,253,248,.78)}.sf-hero-tone-light .sf-hero-meta{border-color:rgba(255,253,248,.38)}

/* Six visual grammars for the eleven semantic modules. */
.sf-section-outcomes{background:var(--skin-surface)}
.sf-outcome-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:0;padding:0;list-style:none;border-top:1px solid var(--skin-line)}
.sf-outcome-item{display:flex;flex-direction:column;gap:24px;min-height:220px;padding:26px 26px 26px 0;border-right:1px solid var(--skin-line)}
.sf-outcome-item+.sf-outcome-item{padding-left:26px}.sf-outcome-item:nth-child(3n){padding-right:0;border-right:0}
.sf-index,.sf-deliverable-index,.sf-process-number{font-variant-numeric:tabular-nums;color:var(--skin-accent);font-size:12px;letter-spacing:.12em;font-weight:750}
.sf-list-copy{display:grid;gap:10px}.sf-list-title{font-family:var(--skin-serif);font-size:22px;line-height:1.2;font-weight:500}.sf-list-detail{color:var(--skin-ink-muted);font-size:14px;line-height:1.6}
.sf-section-deliverables{background:var(--skin-canvas)}
.sf-deliverable-list{margin-top:34px;border-top:1px solid var(--skin-line)}
.sf-deliverable-row{display:grid;grid-template-columns:54px minmax(0,1fr) auto;align-items:center;gap:20px;padding:21px 0;border-bottom:1px solid var(--skin-line)}
.sf-deliverable-copy{display:grid;gap:5px}.sf-deliverable-name{font-size:17px}.sf-deliverable-purpose{color:var(--skin-ink-muted);font-size:13px}.sf-deliverable-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.sf-pill{display:inline-flex;align-items:center;min-height:26px;padding:4px 9px;border:1px solid var(--skin-line);border-radius:999px;color:var(--skin-ink-muted);font-size:11px;font-weight:700}.sf-pill-muted{background:var(--skin-surface-soft)}.sf-inline-meta{margin-top:24px}
.sf-section-preview{background:var(--skin-surface)}
.sf-preview-shell{display:grid;gap:16px;margin-top:32px}.sf-preview-stage{min-width:0}.sf-preview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.sf-preview-item{display:grid;gap:12px;min-width:0;padding:20px;border:1px solid var(--skin-line);border-radius:var(--skin-radius);background:var(--skin-canvas)}.sf-preview-stage>.sf-preview-item{padding:26px}.sf-preview-item-label{font-size:14px;line-height:1.4}.sf-media-frame{margin:0;overflow:hidden;border-radius:12px;background:#e5e7f7}.sf-preview-image,.sf-preview-video{display:block;width:100%;max-height:640px;object-fit:contain;aspect-ratio:16/10;background:#e8e9f8}.sf-preview-video{min-height:220px}.sf-media-caption{padding:11px 13px;color:var(--skin-ink-muted);font-size:12px;line-height:1.45}.sf-preview-demo{display:block;width:100%;min-height:360px;border:1px solid var(--skin-line);border-radius:10px;background:var(--skin-surface)}.sf-preview-link{display:inline-flex;width:max-content;max-width:100%;padding:11px 14px;border-radius:9px;background:var(--skin-accent);color:var(--skin-accent-ink)!important;font-size:13px;font-weight:700;text-decoration:none}.sf-preview-link:hover{background:var(--skin-accent-strong)}.sf-empty-media{min-height:190px;display:grid;place-items:center;border:1px dashed var(--skin-line);border-top:1px dashed var(--skin-line);border-radius:var(--skin-radius)}
.sf-section-audience{background:var(--skin-canvas)}.sf-fit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border-top:1px solid var(--skin-line)}.sf-fit-column{padding:26px 28px 12px 0}.sf-fit-column+.sf-fit-column{padding-left:28px;padding-right:0;border-left:1px solid var(--skin-line)}.sf-subheading{margin:0 0 15px;font-family:var(--skin-serif);font-size:24px;font-weight:500}.sf-simple-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}.sf-simple-item{position:relative;padding-left:18px;color:var(--skin-ink-muted);font-size:14px;line-height:1.6}.sf-simple-item:before{position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--skin-accent);content:""}.sf-fit-neutral .sf-simple-item:before{background:#a7aaa0}.sf-requirements{display:flex;gap:16px;align-items:baseline;margin-top:30px;padding-top:17px;border-top:1px solid var(--skin-line)}.sf-requirements-copy{color:var(--skin-ink-muted);font-size:13px;line-height:1.6}
.sf-section-specs{background:var(--skin-surface)}.sf-spec-grid{display:grid;grid-template-columns:150px minmax(0,1fr);margin:0;border-top:1px solid var(--skin-line)}.sf-spec-label,.sf-spec-value{padding:16px 0;border-bottom:1px solid var(--skin-line);font-size:14px;line-height:1.55}.sf-spec-label{color:var(--skin-ink-muted)}.sf-spec-value{margin:0;font-weight:650}.sf-authorization{display:grid;gap:12px;margin-top:34px;padding:22px 24px;border-left:3px solid var(--skin-accent);background:var(--skin-canvas)}.sf-authorization .sf-policy{margin:0}
.sf-section-process{background:var(--skin-canvas)}.sf-process-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:36px 0 0;padding:0;list-style:none;border-top:1px solid var(--skin-line)}.sf-process-step{position:relative;display:grid;gap:35px;min-height:180px;padding:22px 20px 0 0;border-right:1px solid var(--skin-line)}.sf-process-step+.sf-process-step{padding-left:20px}.sf-process-step:last-child{border-right:0;padding-right:0}.sf-process-copy{display:grid;gap:10px;align-content:start}.sf-process-title{font-size:16px}.sf-process-description{color:var(--skin-ink-muted);font-size:13px;line-height:1.55}
.sf-section-proof{background:var(--skin-surface)}.sf-proof-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.sf-proof-card{display:grid;gap:20px;min-height:210px;padding:26px;border:1px solid var(--skin-line);border-radius:var(--skin-radius);background:var(--skin-canvas)}.sf-proof-copy{margin:0;font-family:var(--skin-serif);font-size:24px;line-height:1.35}.sf-proof-byline{color:var(--skin-ink-muted);font-size:13px;font-style:normal}
.sf-section-faq{background:var(--skin-surface)}.sf-faq{border-top:1px solid var(--skin-line)}.sf-faq:last-child{border-bottom:1px solid var(--skin-line)}.sf-faq-summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:21px 0;cursor:pointer;font-size:16px;font-weight:680;list-style:none}.sf-faq-summary::-webkit-details-marker{display:none}.sf-faq-summary:after{content:"+";color:var(--skin-accent);font-size:24px;font-weight:300}.sf-faq[open] .sf-faq-summary:after{content:"−"}.sf-faq-answer{max-width:var(--skin-content);margin:0;padding:0 50px 23px 0;color:var(--skin-ink-muted);font-size:14px;line-height:1.75}
.sf-section-policies{background:var(--skin-canvas);padding-bottom:76px}.sf-policy-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-bottom:26px;border-top:1px solid var(--skin-line)}.sf-policy-item{padding:21px 20px 0 0;border-right:1px solid var(--skin-line)}.sf-policy-item+.sf-policy-item{padding-left:20px}.sf-policy-item:last-child{padding-right:0;border-right:0}.sf-policy{margin:10px 0 0;color:var(--skin-ink-muted);font-size:13px;line-height:1.65}
.sf-final-cta{width:100%;max-width:none;padding-top:90px;padding-bottom:90px;background:var(--skin-inverse);color:var(--skin-surface);border-bottom:0}.sf-final-inner{width:min(100%,var(--skin-shell));margin:0 auto;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:50px;align-items:end}.sf-final-cta .sf-eyebrow{color:#9ab69f}.sf-final-cta .sf-heading{max-width:650px}.sf-final-summary{max-width:580px;margin:22px 0 0;color:#b4c0b5;line-height:1.7}.sf-final-action{justify-self:end;min-width:260px}.sf-final-action .sf-price{color:var(--skin-surface)}.sf-final-action .sf-price-compare{color:#9aa79c}
.sf-sticky-buy{position:fixed;z-index:20;right:20px;bottom:20px;left:20px;display:flex;align-items:center;gap:18px;width:min(680px,calc(100% - 40px));margin:auto;padding:12px 14px 12px 18px;border:1px solid rgba(18,23,20,.14);border-radius:14px;background:rgba(255,253,248,.93);box-shadow:0 18px 55px rgba(16,21,18,.2);backdrop-filter:blur(16px);opacity:0;transform:translateY(14px);transition:opacity .2s ease,transform .2s ease}.sf-sticky-buy.is-visible{opacity:1;transform:none}.sf-sticky-name{min-width:0;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:650}.sf-sticky-buy .sf-price{font-size:20px;white-space:nowrap}.sf-sticky-buy .sf-price-compare{display:none}.sf-sticky-buy .sf-cta{white-space:nowrap}

/* Checkout and delivery states reuse the same canvas, typography and spacing. */
.pc-checkout,.sf-state-card{width:min(100% - 40px,700px);margin:clamp(38px,8vw,110px) auto;padding:clamp(28px,5vw,58px);border:1px solid var(--skin-line);border-radius:var(--skin-radius);background:var(--skin-surface);box-shadow:0 18px 55px rgba(29,39,30,.09)}.pc-checkout{text-align:center}.pc-checkout h2,.sf-state-title{margin:0;font-family:var(--skin-serif);font-size:clamp(32px,5vw,54px);font-weight:500;letter-spacing:-.04em}.pc-checkout button{margin:8px;padding:10px 14px;border-radius:8px;border:1px solid var(--skin-line);background:var(--skin-surface);cursor:pointer}.pc-checkout .pc-sim-success{color:var(--skin-accent)}.pc-checkout .pc-sim-failed{color:var(--skin-danger)}.sf-state{min-height:100vh;padding:1px var(--skin-gutter);background:var(--skin-canvas)}.sf-state-card{display:grid;gap:18px}.sf-state-title{font-size:clamp(32px,5vw,56px)}.sf-state-note{margin:0;color:var(--skin-ink-muted);line-height:1.75}.sf-delivery-text{padding:22px;border:1px solid var(--skin-line);border-radius:12px;background:var(--skin-canvas);line-height:1.8}.sf-buy{display:inline-flex;align-items:center;min-height:44px;padding:10px 14px;border-radius:9px;background:var(--skin-accent);color:var(--skin-accent-ink)!important;text-decoration:none;font-weight:700}.sf-delivery-attachments{padding-top:22px;border-top:1px solid var(--skin-line)}.sf-delivery-attachments h2{font-family:var(--skin-serif);font-weight:500}.sf-delivery-attachments p{margin:12px 0}.sf-expiry{font-size:13px;color:var(--skin-ink-muted)}
.sf-delivery-api{padding:22px;border:1px solid var(--skin-line);border-radius:12px;background:var(--skin-canvas)}.sf-delivery-api h2{margin:0 0 16px;font-family:var(--skin-serif);font-size:24px;font-weight:500}.sf-api-fields{margin:0;display:grid;gap:0}.sf-api-fields>div{display:grid;grid-template-columns:minmax(110px,.4fr) minmax(0,1fr);gap:16px;padding:12px 0;border-top:1px solid var(--skin-line)}.sf-api-fields>div:first-child{border-top:0}.sf-api-fields dt{color:var(--skin-ink-muted);font-size:13px}.sf-api-fields dd{margin:0;overflow-wrap:anywhere}.sf-api-list{margin:0;padding-left:20px;display:grid;gap:8px}.sf-api-empty{color:var(--skin-ink-muted)}

@media (max-width:1199px){.sf-hero-inner{grid-template-columns:minmax(0,6fr) minmax(280px,5fr);gap:42px}.sf-title{font-size:clamp(52px,8vw,84px)}.sf-outcome-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.sf-outcome-item:nth-child(3n){padding-right:26px;border-right:1px solid var(--skin-line)}.sf-outcome-item:nth-child(2n){padding-right:0;border-right:0}.sf-process-list{grid-template-columns:repeat(2,minmax(0,1fr))}.sf-process-step:nth-child(2){border-right:0;padding-right:0}.sf-process-step:nth-child(n+3){border-top:1px solid var(--skin-line);padding-top:22px}.sf-process-step:nth-child(3){padding-left:0}}
@media (max-width:767px){.sf-section{padding:66px 22px}.sf-section:first-child{padding-top:32px}.sf-storefront[data-mode="public"]{padding-bottom:84px}.sf-hero{min-height:0}.sf-hero-inner{display:flex;flex-direction:column;gap:40px;padding:42px 22px 40px}.sf-title{font-size:clamp(48px,15vw,72px)}.sf-subtitle{font-size:17px}.sf-hero-media{margin-top:30px}.sf-purchase-card{order:2}.sf-hero-facts{grid-template-columns:1fr;gap:0;padding:0 22px;border-top:1px solid var(--skin-line)}.sf-fact,.sf-fact:nth-child(2),.sf-fact:last-child{padding:15px 0;border-right:0;border-bottom:1px solid var(--skin-line)}.sf-fact:last-child{border-bottom:0}.sf-outcome-grid{grid-template-columns:1fr}.sf-outcome-item,.sf-outcome-item+.sf-outcome-item,.sf-outcome-item:nth-child(3n),.sf-outcome-item:nth-child(2n){min-height:0;padding:22px 0;border-right:0;border-bottom:1px solid var(--skin-line)}.sf-outcome-item:last-child{border-bottom:0}.sf-deliverable-row{grid-template-columns:38px minmax(0,1fr);gap:12px}.sf-deliverable-meta{grid-column:2;justify-content:flex-start}.sf-preview-grid{grid-template-columns:1fr}.sf-preview-stage>.sf-preview-item,.sf-preview-item{padding:16px}.sf-fit-grid{grid-template-columns:1fr}.sf-fit-column,.sf-fit-column+.sf-fit-column{padding:22px 0;border-left:0}.sf-fit-column+.sf-fit-column{border-top:1px solid var(--skin-line)}.sf-requirements{display:grid;gap:8px}.sf-spec-grid{grid-template-columns:100px minmax(0,1fr)}.sf-process-list{grid-template-columns:1fr}.sf-process-step,.sf-process-step+.sf-process-step,.sf-process-step:nth-child(2),.sf-process-step:nth-child(3){min-height:0;padding:20px 0;border-right:0;border-top:0;border-bottom:1px solid var(--skin-line)}.sf-process-step:last-child{border-bottom:0}.sf-proof-grid{grid-template-columns:1fr}.sf-policy-grid{grid-template-columns:1fr}.sf-policy-item,.sf-policy-item+.sf-policy-item,.sf-policy-item:last-child{padding:18px 0;border-right:0;border-bottom:1px solid var(--skin-line)}.sf-policy-item:last-child{border-bottom:0}.sf-final-inner{grid-template-columns:1fr;gap:42px}.sf-final-action{justify-self:stretch}.sf-final-action .sf-cta{width:100%}.sf-sticky-buy{right:10px;bottom:10px;left:10px;width:calc(100% - 20px);gap:10px;padding:10px 11px 10px 14px}.sf-sticky-name{font-size:12px}.sf-sticky-buy .sf-price{font-size:18px}.sf-sticky-buy .sf-cta{min-height:40px;padding:8px 12px;font-size:12px}.sf-hero-bg-cover .sf-hero-inner{background:rgba(244,241,232,.86)}.sf-hero-tone-light .sf-hero-inner{background:rgba(16,21,18,.62)}}
@media (max-width:419px){.sf-section{padding-right:18px;padding-left:18px}.sf-hero-inner{padding-right:18px;padding-left:18px}.sf-hero-facts{padding-right:18px;padding-left:18px}.sf-title{font-size:clamp(44px,14vw,60px)}.sf-heading{font-size:36px}.sf-purchase-card{padding:22px}.sf-quantity-label{font-size:12px}.sf-cta{width:100%}.sf-spec-grid{grid-template-columns:86px minmax(0,1fr)}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.sf-cta,.sf-sticky-buy{transition:none!important}.sf-cta:hover:not(:disabled){transform:none}.pc-preview *{transition:none!important;animation:none!important}}

/* m5.7 summit direction: a dark, broadcast-like Hero with an indigo signal system. */
.sf-storefront{background:var(--skin-canvas)}
.sf-section{padding-top:clamp(78px,10vw,146px);padding-bottom:clamp(78px,10vw,146px)}
.sf-section:not(.sf-hero) .sf-heading{font-family:var(--skin-sans);font-weight:780;letter-spacing:-.065em}
.sf-section:not(.sf-hero) .sf-eyebrow{color:var(--skin-accent);font-weight:800}
.sf-storefront[data-mode="preview"] .sf-section[role=button]:hover,.sf-storefront[data-mode="preview"] .sf-section[role=button]:focus{box-shadow:inset 0 0 0 2px rgba(85,96,224,.7)}
.sf-storefront[data-mode="preview"] .sf-section[role=button]:focus-visible{outline-color:var(--skin-accent-wash)}

.sf-hero{position:relative;isolation:isolate;min-height:720px;background:var(--skin-inverse);color:#fff;border-bottom:0;overflow:hidden}
.sf-hero:before{position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(157,167,255,.13) 1px,transparent 1px),linear-gradient(90deg,rgba(157,167,255,.13) 1px,transparent 1px);background-size:72px 72px;opacity:.52;content:"";pointer-events:none}
.sf-hero:after{position:absolute;top:-190px;right:-150px;z-index:-1;width:min(48vw,620px);height:min(48vw,620px);border:1px solid rgba(157,167,255,.4);border-radius:50%;box-shadow:0 0 0 30px rgba(85,96,224,.09),0 0 0 62px rgba(85,96,224,.06);content:"";pointer-events:none}
.sf-hero-inner{min-height:610px;grid-template-columns:minmax(0,1.18fr) minmax(320px,.82fr);gap:clamp(38px,6vw,92px);align-items:center;padding-top:clamp(72px,10vw,136px);padding-bottom:clamp(58px,7vw,92px)}
.sf-hero-copy{position:relative;z-index:1;align-items:flex-start}
.sf-hero .sf-eyebrow{color:#aab1ff;letter-spacing:.19em;font-size:12px}
.sf-hero .sf-title{max-width:820px;margin:24px 0 25px;font-family:var(--skin-sans);font-size:clamp(58px,8.2vw,112px);font-weight:820;line-height:.91;letter-spacing:-.09em;color:#fff;text-shadow:0 10px 35px rgba(4,6,30,.25)}
.sf-hero .sf-subtitle{max-width:630px;color:rgba(245,246,255,.78);font-size:clamp(17px,1.9vw,22px);line-height:1.55}
.sf-hero .sf-hero-meta{border-color:rgba(218,221,255,.32);color:rgba(234,236,255,.68)}
.sf-hero .sf-meta-value{color:#fff}
.sf-hero-tone-dark{color:var(--skin-ink)}
.sf-hero-tone-dark .sf-eyebrow{color:var(--skin-accent)}
.sf-hero-tone-dark .sf-title{color:var(--skin-ink);text-shadow:none}
.sf-hero-tone-dark .sf-subtitle{color:var(--skin-ink-muted)}
.sf-hero-tone-dark .sf-hero-meta{border-color:var(--skin-line);color:var(--skin-ink-muted)}
.sf-hero-tone-dark .sf-meta-value{color:var(--skin-ink)}
.sf-hero-tone-light .sf-hero-inner{background:transparent}
.sf-hero-tone-light .sf-eyebrow{color:#aab1ff}
.sf-hero-tone-light .sf-title{color:#fff}
.sf-hero-tone-light .sf-subtitle{color:rgba(245,246,255,.78)}
.sf-hero-media{margin-top:38px}
.sf-hero-media .sf-preview-item{gap:10px}
.sf-hero-media .sf-media-frame{border-radius:4px 20px 4px 20px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);box-shadow:0 22px 60px rgba(3,4,23,.25)}
.sf-hero-media .sf-preview-image,.sf-hero-media .sf-preview-video{max-height:300px;aspect-ratio:16/8;object-fit:cover}
.sf-hero-media-empty{min-height:184px;padding:26px!important;border:1px dashed rgba(210,215,255,.42)!important;border-radius:4px 20px 4px 20px;background:rgba(255,255,255,.07)}
.sf-hero-media-empty .sf-media-kicker{color:#aab1ff}
.sf-hero-media-empty .sf-media-empty-title{font-family:var(--skin-sans);font-weight:750;color:#fff}
.sf-hero-media-empty .sf-media-empty-note{color:rgba(245,246,255,.65)}
.sf-purchase-card{align-self:center;display:flex;flex-direction:column;justify-content:center;padding:clamp(26px,3.4vw,42px);border:1px solid rgba(255,255,255,.28);border-radius:4px 24px 4px 24px;background:rgba(255,255,255,.97);box-shadow:0 28px 90px rgba(2,4,29,.36)}
.sf-purchase-card:before{display:block;width:38px;height:4px;margin-bottom:26px;background:var(--skin-accent);content:""}
.sf-card-kicker{margin-bottom:21px;color:var(--skin-accent);font-weight:800}
.sf-price{color:var(--skin-ink);font-weight:780}
.sf-quantity-label{border-color:var(--skin-line)}
.sf-quantity-input:focus{outline-color:var(--skin-accent-wash)}
.sf-cta{border-radius:3px 13px 3px 13px;background:var(--skin-accent);box-shadow:0 10px 26px rgba(85,96,224,.28)}
.sf-cta:hover:not(:disabled){background:var(--skin-accent-strong);box-shadow:0 14px 32px rgba(85,96,224,.36)}
.sf-cta:focus-visible{outline-color:rgba(85,96,224,.38)}
.sf-hero-facts{border-color:rgba(218,221,255,.25)}
.sf-fact{border-color:rgba(218,221,255,.25)}
.sf-fact-label{color:#aab1ff}
.sf-fact-value{color:#fff}
.sf-hero-background{opacity:.88}
.sf-hero-overlay{background:rgba(16,19,53,.26)}
.sf-overlay-none{background:transparent}.sf-overlay-dark_35{background:rgba(16,19,53,.35)}.sf-overlay-dark_55{background:rgba(16,19,53,.55)}.sf-overlay-light_35{background:rgba(255,255,255,.35)}.sf-overlay-light_55{background:rgba(255,255,255,.55)}
.sf-hero-bg-ambient .sf-hero-background{filter:saturate(.82) blur(24px);opacity:.5}
.sf-hero-bg-ambient .sf-hero-inner{background:rgba(16,19,53,.35)}
.sf-hero-bg-cover .sf-hero-inner{background:rgba(16,19,53,.2)}

.sf-section-outcomes{background:var(--skin-accent-soft)}
.sf-outcome-grid{border-top:2px solid var(--skin-accent)}
.sf-outcome-item{min-height:238px;border-color:rgba(85,96,224,.22)}
.sf-outcome-item+.sf-outcome-item{border-color:rgba(85,96,224,.22)}
.sf-index,.sf-deliverable-index,.sf-process-number{color:var(--skin-accent);font-weight:850}
.sf-list-title{font-family:var(--skin-sans);font-weight:740;letter-spacing:-.025em}
.sf-section-deliverables{background:var(--skin-canvas)}
.sf-deliverable-list,.sf-preview-shell,.sf-fit-grid,.sf-spec-grid,.sf-process-list,.sf-faq,.sf-policy-grid{border-color:var(--skin-line)}
.sf-deliverable-row{transition:padding-left .2s ease,background .2s ease}
.sf-deliverable-row:hover{padding-left:12px;background:rgba(255,255,255,.68)}
.sf-deliverable-name{font-weight:720}
.sf-pill{border-radius:3px 9px 3px 9px;border-color:#c9ccef;background:rgba(255,255,255,.68)}
.sf-pill-muted{background:var(--skin-accent-soft)}
.sf-section-preview{background:var(--skin-surface)}
.sf-preview-item,.sf-proof-card{border-radius:4px 18px 4px 18px;border-color:#cfd2e8;background:var(--skin-canvas)}
.sf-preview-stage>.sf-preview-item{border:1px solid var(--skin-accent);box-shadow:0 18px 52px rgba(55,62,147,.1)}
.sf-media-frame{border-radius:3px 15px 3px 15px;background:#e1e4f6}
.sf-preview-image,.sf-preview-video{background:#e5e7f7}
.sf-preview-link{border-radius:3px 12px 3px 12px;background:var(--skin-accent);box-shadow:0 8px 22px rgba(85,96,224,.2)}
.sf-preview-link:hover{background:var(--skin-accent-strong)}
.sf-section-audience{background:var(--skin-canvas)}
.sf-simple-item:before{background:var(--skin-accent)}
.sf-section-specs{background:var(--skin-surface)}
.sf-authorization{border-left-color:var(--skin-accent);background:var(--skin-accent-soft)}
.sf-section-process{background:var(--skin-canvas)}
.sf-process-step{border-color:var(--skin-line)}
.sf-process-number{display:inline-flex;width:36px;height:36px;align-items:center;justify-content:center;border:1px solid var(--skin-accent);border-radius:50%;background:var(--skin-accent-soft);font-size:11px}
.sf-process-step{gap:26px}
.sf-section-proof{background:var(--skin-surface)}
.sf-proof-card{background:var(--skin-accent-soft)}
.sf-proof-copy{font-family:var(--skin-sans);font-weight:680;letter-spacing:-.025em}
.sf-section-faq{background:var(--skin-surface)}
.sf-faq-summary:after{color:var(--skin-accent)}
.sf-section-policies{background:var(--skin-canvas)}
/* 页脚的卖家主页链接:政策三栏下面一排图标胶囊,空列表时渲染器整块不输出。 */
.sf-social{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px;padding-top:26px;border-top:1px solid var(--skin-line)}
.sf-social-link{display:inline-flex;align-items:center;gap:9px;padding:9px 15px;border:1px solid var(--skin-line);border-radius:999px;background:var(--skin-surface);color:var(--skin-ink)!important;text-decoration:none;font-size:13px;font-weight:650;line-height:1;transition:border-color .2s ease,color .2s ease,transform .2s ease}
.sf-social-link:hover{border-color:var(--skin-accent);color:var(--skin-accent)!important;transform:translateY(-1px)}
.sf-social-link svg{width:17px;height:17px;flex:none}
.sf-social-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:180px}
.sf-final-cta{position:relative;overflow:hidden;background:var(--skin-inverse)}
.sf-final-cta:before{position:absolute;right:-50px;bottom:-180px;width:430px;height:430px;border:1px solid rgba(170,177,255,.38);border-radius:50%;box-shadow:0 0 0 30px rgba(85,96,224,.09),0 0 0 62px rgba(85,96,224,.06);content:"";pointer-events:none}
.sf-final-inner{position:relative;z-index:1}
.sf-final-cta .sf-eyebrow{color:#aab1ff}
.sf-final-cta .sf-heading{font-family:var(--skin-sans);font-weight:780;color:#fff}
.sf-final-summary{color:rgba(235,237,255,.72)}
.sf-final-action{padding:26px 0 0 32px;border-left:1px solid rgba(218,221,255,.28)}
.sf-final-action .sf-price{color:#fff}.sf-final-action .sf-price-compare{color:rgba(235,237,255,.58)}
.sf-sticky-buy{border-color:rgba(218,221,255,.25);border-radius:3px 14px 3px 14px;background:rgba(16,19,53,.94);box-shadow:0 18px 55px rgba(16,19,53,.34)}
.sf-sticky-name{color:#fff}.sf-sticky-buy .sf-price{color:#fff}.sf-sticky-buy .sf-cta{box-shadow:none}
.sf-buy{border-radius:3px 12px 3px 12px;background:var(--skin-accent)}
.pc-checkout,.sf-state-card{border-radius:4px 18px 4px 18px;border-color:var(--skin-line);box-shadow:0 18px 55px rgba(55,62,147,.1)}

@media (max-width:767px){
  .sf-hero{min-height:0}
  .sf-hero-inner{gap:36px;padding-top:58px;padding-bottom:52px}
  .sf-hero .sf-title{font-size:clamp(54px,15vw,82px)}
  .sf-hero-media{margin-top:30px}
  .sf-purchase-card{align-self:stretch}
  .sf-hero-facts{background:rgba(16,19,53,.42)}
  .sf-final-action{padding:24px 0 0;border-top:1px solid rgba(218,221,255,.28);border-left:0}
  .sf-deliverable-row:hover{padding-left:0;background:transparent}
}

@media (prefers-reduced-motion:reduce){.sf-deliverable-row{transition:none}}

/* Hero and footer are full-bleed; content sections use a centered content track. */
.sf-section:not(.sf-hero):not(.sf-final-cta){width:100%;max-width:none;margin-inline:0;padding-right:max(var(--skin-gutter),calc((100% - var(--skin-shell))/2));padding-left:max(var(--skin-gutter),calc((100% - var(--skin-shell))/2))}
.sf-hero,.sf-final-cta{width:100%;max-width:none;margin-left:0;margin-right:0}
.sf-heading-wrap{gap:15px}
.sf-hero-inner{grid-template-columns:minmax(0,1.28fr) minmax(310px,.72fr);gap:clamp(32px,5vw,72px)}
.sf-hero .sf-title{max-width:760px;font-size:clamp(48px,6.4vw,88px);line-height:1.08;letter-spacing:-.055em;text-wrap:pretty}
.sf-deliverable-row{padding-right:24px}

@media (max-width:767px){
  .sf-section{padding-right:22px;padding-left:22px}
  .sf-hero .sf-title{max-width:100%;font-size:clamp(46px,13vw,68px);line-height:1.08;letter-spacing:-.065em}
  .sf-deliverable-row{padding-right:18px}
}

@media (max-width:419px){.sf-section{padding-right:18px;padding-left:18px}}

/* The product-center preview is a narrow container inside a wide app window.
   Container queries keep the storefront readable there instead of letting a
   desktop two-column Hero squeeze its title into one-character lines. */
.ppc-preview-root{container:product-preview / inline-size}
@container product-preview (max-width:1040px){
  .sf-section{padding-right:24px;padding-left:24px}
  .sf-hero-inner{display:flex;flex-direction:column;gap:36px;padding-top:58px;padding-bottom:52px}
  .sf-hero-inner,.sf-hero-facts{padding-right:24px;padding-left:24px}
  .sf-hero .sf-title{max-width:100%;font-size:clamp(44px,7.5cqw,78px);line-height:1.08;letter-spacing:-.06em}
  .sf-purchase-card{order:2;align-self:stretch;max-width:none}
  .sf-hero-media{margin-top:30px}
  .sf-outcome-grid,.sf-process-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sf-final-inner{grid-template-columns:1fr;gap:42px}
  .sf-final-action{justify-self:stretch}
}
@container product-preview (max-width:680px){
  .sf-section{padding-right:18px;padding-left:18px}
  .sf-hero-inner,.sf-hero-facts{padding-right:18px;padding-left:18px}
  .sf-hero .sf-title{font-size:clamp(42px,10cqw,68px);line-height:1.1}
  .sf-hero-facts{grid-template-columns:1fr;gap:0;padding-right:22px;padding-left:22px}
  .sf-fact,.sf-fact:nth-child(2),.sf-fact:last-child{padding:15px 0;border-right:0;border-bottom:1px solid rgba(218,221,255,.25)}
  .sf-fact:last-child{border-bottom:0}
  .sf-outcome-grid,.sf-process-list,.sf-preview-grid,.sf-fit-grid,.sf-proof-grid,.sf-policy-grid{grid-template-columns:1fr}
  .sf-deliverable-row{grid-template-columns:38px minmax(0,1fr);gap:12px;padding-right:18px}
  .sf-deliverable-meta{grid-column:2;justify-content:flex-start}
  .sf-fit-column,.sf-fit-column+.sf-fit-column{padding-right:0;padding-left:0;border-left:0}
  .sf-fit-column+.sf-fit-column{border-top:1px solid var(--skin-line)}
  .sf-final-action{padding:24px 0 0;border-top:1px solid rgba(218,221,255,.28);border-left:0}
}

/*
   The editor preview is a container inside the app, so viewport units here
   refer to the outer browser window and can swallow the actual page content.
   Keep the full-bleed public page rules above, but make the embedded preview
   measure its gutters from the preview container itself.
*/
.ppc-preview-root .sf-section{
  padding-inline:24px;
  padding-inline:clamp(20px,4cqw,72px)
}
.ppc-preview-root .sf-hero-inner,.ppc-preview-root .sf-hero-facts{
  padding-inline:24px;
  padding-inline:clamp(20px,4cqw,72px)
}
@container product-preview (max-width:1040px){
  .ppc-preview-root .sf-section{padding-inline:24px;padding-inline:clamp(22px,3.5cqw,40px)}
  .ppc-preview-root .sf-hero-inner,.ppc-preview-root .sf-hero-facts{padding-inline:24px;padding-inline:clamp(22px,3.5cqw,40px)}
}
@container product-preview (max-width:680px){
  .ppc-preview-root .sf-section{padding-inline:18px}
  .ppc-preview-root .sf-hero-inner,.ppc-preview-root .sf-hero-facts{padding-inline:18px}
}

/* Responsive polish: keep reading measure, rhythm and alignment stable. */
.sf-storefront{letter-spacing:.01em}
.sf-storefront .sf-hero{padding-inline:0}
.sf-storefront .sf-heading,.sf-section:not(.sf-hero) .sf-heading{letter-spacing:.01em}
.sf-storefront .sf-hero .sf-title{letter-spacing:.01em}
.sf-storefront .sf-list-title,.sf-storefront .sf-proof-copy{letter-spacing:0}

@media (max-width:767px){
  .sf-storefront .sf-section:not(.sf-hero):not(.sf-final-cta){padding-inline:clamp(26px,6vw,36px)}
  .sf-storefront .sf-section-process .sf-process-step{padding-left:0;padding-right:0}
}

@media (min-width:1200px){
  .sf-storefront .sf-hero-inner{
    gap:clamp(28px,3.5vw,56px);
    padding-inline:clamp(28px,3.5vw,48px);
    padding-top:clamp(56px,6vw,92px);
    padding-bottom:clamp(48px,5vw,72px)
  }
}

@container product-preview (min-width:681px){
  .ppc-preview-root .sf-hero-inner{
    gap:clamp(28px,3.5cqw,56px);
    padding-inline:clamp(28px,3.5cqw,48px)
  }
}

@container product-preview (max-width:680px){
  .ppc-preview-root .sf-section:not(.sf-hero):not(.sf-final-cta){padding-inline:28px}
  .ppc-preview-root .sf-section-process .sf-process-step{padding-left:0;padding-right:0}
}

/* Preview and mobile overrides keep the same full-bleed background model. */
.ppc-preview-root .sf-section:not(.sf-hero):not(.sf-final-cta){
  padding-inline:24px;
  padding-inline:max(24px,3.5cqw,calc((100cqw - var(--skin-shell))/2))
}
@media (max-width:767px){
  .sf-storefront .sf-section:not(.sf-hero):not(.sf-final-cta){padding-inline:clamp(26px,6vw,36px)}
}
@container product-preview (max-width:680px){
  .ppc-preview-root .sf-section:not(.sf-hero):not(.sf-final-cta){padding-inline:28px}
}

/* On compact screens the two full-bleed bookends need their own breathing room. */
@media (max-width:767px){
  .sf-storefront .sf-hero-inner{
    padding-inline:clamp(24px,5vw,32px);
    padding-top:72px;
    padding-bottom:64px
  }
  .sf-storefront .sf-final-cta{
    padding:108px clamp(24px,5vw,32px)
  }
}
@container product-preview (max-width:680px){
  .ppc-preview-root .sf-hero-inner{
    padding-inline:24px;
    padding-top:72px;
    padding-bottom:64px
  }
  .ppc-preview-root .sf-final-cta{padding:108px 24px}
  .ppc-preview-root .sf-section:not(.sf-hero):not(.sf-final-cta){
    padding-top:48px;
    padding-bottom:48px
  }
  .ppc-preview-root .sf-policy-item,
  .ppc-preview-root .sf-policy-item+.sf-policy-item,
  .ppc-preview-root .sf-policy-item:last-child{
    padding:18px 0;
    border-right:0;
    border-bottom:1px solid var(--skin-line)
  }
  .ppc-preview-root .sf-policy-item:last-child{border-bottom:0}
}

/* Course content: instructor block on top, collapsible chapter grid with a learning-path strip below. */
.sf-section-course{background:var(--skin-surface)}
.sf-curriculum-head{display:flex;justify-content:space-between;align-items:flex-start;gap:28px}
.sf-curriculum-head-copy{min-width:0}.sf-curriculum-head-copy .sf-heading-wrap{margin-bottom:14px}
.sf-curriculum-badge{flex-shrink:0;display:grid;justify-items:end;gap:2px;padding:18px 24px;border:1px solid var(--skin-line);border-radius:4px 18px 4px 18px;background:var(--skin-accent-soft);color:var(--skin-ink-muted);font-size:13px;white-space:nowrap}
.sf-curriculum-badge-count{font-size:40px;line-height:1;font-weight:820;letter-spacing:-.04em;color:var(--skin-accent)}
.sf-curriculum-path{display:flex;flex-wrap:wrap;align-items:center;gap:14px 18px;margin:30px 0 26px;padding:18px 24px;border-radius:4px 18px 4px 18px;background:var(--skin-inverse);color:rgba(235,237,255,.78);font-size:14px}
.sf-curriculum-path-label{color:#fff;font-weight:750;letter-spacing:.04em}
.sf-curriculum-path-stage{flex:1 1 auto}
.sf-curriculum-path-arrow{color:#aab1ff}
.sf-curriculum-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:0 0 16px;color:var(--skin-ink-muted);font-size:13px}
.sf-curriculum-expand{padding:9px 14px;border:1px solid var(--skin-line);border-radius:3px 12px 3px 12px;background:var(--skin-surface);color:var(--skin-accent);font-size:13px;font-weight:650;cursor:pointer}
.sf-curriculum-expand:hover{border-color:var(--skin-accent);background:var(--skin-accent-soft)}
.sf-curriculum-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;align-items:start}
.sf-chapter{border:1px solid var(--skin-line);border-radius:4px 16px 4px 16px;background:var(--skin-canvas);overflow:hidden}
.sf-chapter[open]{grid-column:1/-1;border-color:var(--skin-accent);background:var(--skin-accent-soft)}
.sf-chapter-summary{display:flex;align-items:center;gap:14px;padding:18px;cursor:pointer;font-size:15px;line-height:1.5;list-style:none}
.sf-chapter-summary::-webkit-details-marker{display:none}
.sf-chapter-index{display:grid;place-items:center;min-width:42px;height:42px;padding:0 8px;border-radius:10px;background:var(--skin-surface);color:var(--skin-accent);font-size:14px;font-weight:800;font-variant-numeric:tabular-nums}
.sf-chapter-title{flex:1;min-width:0;font-weight:650}
.sf-chapter-count{color:var(--skin-ink-muted);font-size:12px;font-style:normal;white-space:nowrap}
.sf-chapter-toggle{font-style:normal;color:var(--skin-accent);font-size:20px;line-height:1}
.sf-chapter-toggle:before{content:"+"}
.sf-chapter[open] .sf-chapter-toggle:before{content:"−"}
.sf-lesson-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 30px;margin:0;padding:0 24px 18px;list-style:none}
.sf-lesson{padding:10px 0;border-top:1px solid var(--skin-line);color:var(--skin-ink);font-size:14px;line-height:1.7;overflow-wrap:anywhere}
.sf-lesson-empty{color:var(--skin-ink-muted)}

/* Instructor block inside the course section. */
.sf-instructor{margin:8px 0 40px;padding:clamp(22px,3vw,34px);border:1px solid var(--skin-line);border-radius:4px 20px 4px 20px;background:var(--skin-canvas)}
.sf-instructor-main{display:grid;grid-template-columns:minmax(240px,310px) minmax(0,1fr);gap:clamp(28px,4vw,50px);align-items:center}
.sf-instructor-no-portrait{grid-template-columns:minmax(0,1fr)}
.sf-instructor-portrait{position:relative;margin:0;height:400px;border-radius:4px 20px 4px 20px;overflow:hidden;background:var(--skin-accent-soft)}
.sf-instructor-image{display:block;width:100%;height:100%;object-fit:cover}
.sf-instructor-copy{min-width:0}
.sf-instructor-name{margin:12px 0 6px;font-size:clamp(30px,3.6vw,46px);font-weight:800;letter-spacing:-.045em;line-height:1.1;color:var(--skin-ink)}
.sf-instructor-role{margin:0;color:var(--skin-accent);font-size:17px;font-weight:700}
.sf-instructor-bio{margin:16px 0 0;max-width:var(--skin-content);color:var(--skin-ink-muted);font-size:15px;line-height:1.8}
.sf-instructor-credentials{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
.sf-credential{display:grid;gap:4px;padding:14px 18px;border:1px solid var(--skin-line);border-radius:4px 14px 4px 14px;background:var(--skin-surface);font-size:14px;line-height:1.6}
.sf-credential-label{color:var(--skin-accent)}
.sf-credential-text{color:var(--skin-ink)}
.sf-instructor-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:32px}
.sf-instructor-proof{margin:0;padding:7px;border:1px solid var(--skin-line);background:var(--skin-surface)}
.sf-instructor-proof-image{display:block;width:100%;height:200px;object-fit:cover;border-radius:3px 12px 3px 12px;background:#e5e7f7}
.sf-instructor-proof .sf-media-caption{padding:10px 5px 4px;color:var(--skin-ink-muted);font-size:12px}
.sf-instructor-footnote{margin-top:22px;padding-top:18px;border-top:1px solid var(--skin-line);font-size:13px}
@media (max-width:1199px){.sf-instructor-gallery{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:767px){
  .sf-curriculum-head{display:block}
  .sf-curriculum-badge{display:inline-grid;justify-items:start;margin-top:10px;padding:10px 16px}
  .sf-curriculum-badge-count{font-size:28px}
  .sf-curriculum-path{gap:10px 12px;font-size:12px}
  .sf-curriculum-path-label{width:100%}
  .sf-curriculum-grid,.sf-lesson-list,.sf-instructor-credentials,.sf-instructor-gallery{grid-template-columns:1fr}
  .sf-chapter-summary{gap:10px;padding:13px;font-size:14px}
  .sf-instructor-main{grid-template-columns:1fr;gap:24px}
  .sf-instructor-portrait{width:280px;max-width:100%;height:340px}
}