.sas-intro{--sas-accent:var(--color-accent,#ff5c00);--sas-accent-text:#b84400;max-width:780px;margin:0 auto}body.dark-mode-active .sas-intro{--sas-accent-text:#ff8533}.sas-intro__hero{margin-bottom:20px;padding-top:56px}.sas-intro__badge{color:var(--sas-accent-text);letter-spacing:.02em;background:#ff5c001a;border-radius:20px;margin-bottom:12px;padding:4px 14px;font-size:.875rem;font-weight:600;display:inline-block}.sas-intro .sas-intro__hero p.sas-intro__lead{max-width:620px;color:var(--color-text-secondary,#4a4a4a);margin:0 auto 16px;font-size:1.0625rem;line-height:1.6}.sas-intro__highlights{color:var(--color-text-secondary,#4a4a4a);flex-wrap:wrap;justify-content:center;gap:6px 16px;margin:0;padding:0;font-size:.9375rem;font-weight:500;list-style:none;display:flex}.sas-intro__highlights li+li:before{content:"•";margin-right:16px}.sas-intro__cta-block{flex-direction:column;align-items:center;margin:8px 0 28px;display:flex}.sas-intro__cta-block--bottom{margin:32px 0 8px}.sas-intro__cta-block--faq{margin:28px 0 0}.sas-intro .sas-intro__cta{text-transform:none;letter-spacing:-.01em;background:linear-gradient(135deg,#e04a00,#f25500);border-radius:16px;width:auto;min-height:52px;padding:16px 44px;font-size:1.2rem;font-weight:700;box-shadow:0 8px 24px -4px #e04a0059}.sas-intro__resume{text-align:center;background:var(--color-surface,#fff);border:1px solid var(--color-border,#e5e5e5);border-radius:20px;width:100%;max-width:420px;padding:20px;box-shadow:0 4px 20px -4px #0000000d}.sas-intro__resume-title{color:var(--color-text,#1a1a1a);margin:0 0 4px;font-size:1rem;font-weight:700}.sas-intro__resume-sub{color:var(--color-text-secondary,#4a4a4a);margin:0 0 16px;font-size:.9375rem}.sas-intro__resume-actions{gap:10px;display:flex}.sas-intro .sas-intro__resume-actions .start-btn{flex:1;margin-top:0;padding:14px 16px;font-size:1rem}.sas-intro .sas-intro__cta-secondary{color:var(--sas-accent-text);border:1.5px solid var(--sas-accent-text);box-shadow:none;background:0 0;min-height:52px}.sas-intro__card{background:var(--color-surface,#fff9);border-radius:24px;margin-bottom:20px;padding:28px 24px;box-shadow:0 4px 20px -4px #00000008}.sas-intro__card h2,.sas-intro__faq h2{letter-spacing:-.015em;color:var(--color-text,#1a1a1a);margin:0 0 8px;font-size:1.35rem;font-weight:700}.sas-intro__sub{color:var(--color-text-secondary,#4a4a4a);margin:0 0 20px;font-size:1rem;line-height:1.55}.sas-intro__dot{border-radius:50%;flex:0 0 10px;width:10px;height:10px;margin-top:8px}.sas-intro__sides{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;display:grid}.sas-intro__side{background:var(--color-card,#ffffffe6);border-radius:16px;gap:12px;padding:14px 16px;display:flex}.sas-intro__side h3{color:var(--color-text,#1a1a1a);margin:0 0 4px;font-size:1.0625rem;font-weight:700}.sas-intro__side p{color:var(--color-text-secondary,#4a4a4a);margin:0;font-size:.9375rem;line-height:1.5}.sas-intro__gains{gap:12px;margin:12px 0 0;padding:0;list-style:none;display:grid}.sas-intro__gains li{color:var(--color-text-secondary,#4a4a4a);gap:12px;font-size:1rem;line-height:1.55;display:flex}.sas-intro__gains strong{color:var(--color-text,#1a1a1a)}.sas-intro__about{margin-top:12px}.sas-intro .sas-intro__about p{font-size:1rem}.sas-intro__faq{margin-top:28px}.sas-intro__faq-list{background:var(--color-surface,#fff9);border-radius:20px;padding:4px 20px}.sas-intro__faq-item+.sas-intro__faq-item{border-top:1px solid var(--color-border,#00000014)}.sas-intro__faq-q{cursor:pointer;text-align:left;width:100%;min-height:48px;font:inherit;color:var(--color-text,#1a1a1a);background:0 0;border:none;justify-content:space-between;align-items:center;gap:12px;padding:16px 0;font-size:1rem;font-weight:600;line-height:1.4;display:flex}.sas-intro__faq-q,.sas-intro__faq-q:focus,.sas-intro__faq-q:active{box-shadow:none;-webkit-tap-highlight-color:transparent;border-radius:0;outline:none}.sas-intro__faq-q:focus-visible span:first-child{text-decoration:underline;-webkit-text-decoration-color:var(--sas-accent-text);text-decoration-color:var(--sas-accent-text);text-underline-offset:4px;text-decoration-thickness:2px}.sas-intro__faq-plus{color:var(--color-text-secondary,#4a4a4a);flex-shrink:0;font-size:1.4rem;font-weight:300;transition:transform .2s}.sas-intro__faq-plus.is-open{transform:rotate(45deg)}.sas-intro__faq-a{color:var(--color-text-secondary,#4a4a4a);margin:0 0 16px;font-size:1rem;line-height:1.65}.sas-intro__source{text-align:center;color:var(--color-text-secondary,#4a4a4a);margin:16px 0 0;font-size:.9375rem}.sas-intro__source a{color:var(--sas-accent-text);font-weight:600;text-decoration:underline}.sas-intro__seo{text-align:left;margin-top:28px}.sas-intro__seo h3{color:var(--color-text,#1a1a1a);margin:22px 0 8px;font-size:1.125rem;font-weight:700}.sas-intro__seo p{color:var(--color-text-secondary,#4a4a4a);margin:0 0 12px;font-size:1rem;line-height:1.65}.sas-intro__seo ul{color:var(--color-text-secondary,#4a4a4a);gap:8px;margin:0 0 8px;padding-left:20px;font-size:1rem;line-height:1.6;display:grid}.sas-intro__seo li::marker{color:var(--sas-accent-text)}.sas-intro__science{text-align:left;margin-top:28px}.sas-intro__sticky{display:none}@media (max-width:768px){.sas-intro{padding-bottom:calc(96px + env(safe-area-inset-bottom,0px))}.sas-intro__cta-block--bottom,.sas-intro__cta-block--faq{display:none}.sas-intro__sticky{z-index:90;padding:12px 16px calc(12px + env(safe-area-inset-bottom,0px));background:var(--color-surface,#fff);border-top:1px solid var(--color-border,#e5e5e5);display:block;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -6px 20px #00000014}.sas-intro .sas-intro__sticky-btn{width:100%;margin-top:0}}@media (max-width:480px){.sas-intro__card{padding:22px 16px}.sas-intro .sas-intro__cta{width:100%}.sas-intro .sas-intro__hero h1{font-size:1.85rem}}@media (prefers-reduced-motion:reduce){.sas-intro *{transition:none!important}}
.sas-answer-section{gap:var(--space-4);padding:0 var(--space-4);flex-direction:column;width:100%;max-width:600px;margin:0 auto;display:flex}.sas-options-container{gap:12px;width:100%;display:grid}.sas-option-btn{background-color:var(--surface);border:1px solid var(--border);min-height:56px;color:var(--text-primary);text-align:left;cursor:pointer;border-radius:16px;justify-content:flex-start;align-items:center;gap:16px;padding:16px 20px;font-size:16px;font-weight:500;transition:all .2s;display:flex;box-shadow:0 2px 4px #00000005}.sas-option-btn:hover{border-color:var(--primary-light);background-color:var(--bg-primary);transform:translateY(-1px)}.sas-option-btn.selected{border-color:var(--primary);color:var(--primary-dark);background-color:#378add14;box-shadow:0 4px 12px #378add26}.sas-option-btn.selected .unified-option-num{background-color:var(--primary);color:#fff}.unified-option-short-label{display:none}@media (min-width:480px){.sas-options-container{grid-template-columns:repeat(2,1fr)}}@media (max-width:380px){.sas-option-btn{gap:12px;min-height:48px;padding:12px 16px;font-size:15px}.unified-option-label{display:none}.unified-option-short-label{display:inline}}