.v4s{font-family:var(--f4-body);color:var(--v4-ink-2);background:var(--v4-white)}.v4s h1,.v4s h2,.v4s h3{font-family:var(--f4-display);color:var(--v4-ink);letter-spacing:-.02em}.v4s h1 em,.v4s h1 i,.v4s h2 em,.v4s h2 i{font-family:var(--f4-italic);font-style:italic;font-weight:500;color:var(--v4-terra);font-size:1.02em;letter-spacing:0}.v4s .learn-index-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--v4-rule);background:radial-gradient(100% 140% at 100% 0%,var(--v4-sage) 0%,transparent 55%),linear-gradient(180deg,var(--v4-cloud) 0%,var(--v4-white) 100%);padding:56px var(--page-pad) 46px}.v4s .learn-index-hero-wrap{max-width:1120px;margin:0 auto}.v4s .meet-eyebrow{font-family:var(--f4-body);font-weight:700;font-size:var(--fs-11);letter-spacing:.16em;text-transform:uppercase;color:var(--v4-ink-3);margin-bottom:12px}.v4s .learn-index-hero h1{font-family:var(--f4-display);font-weight:800;font-size:var(--ds-title);letter-spacing:-.026em;line-height:1.02;margin:0 0 16px;max-width:16ch}.v4s .learn-index-hero .lede{font-family:var(--f4-body);font-size:var(--fs-18);line-height:1.6;color:var(--v4-ink-2);max-width:60ch;margin:0 0 22px}.v4s .learn-index-stats{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}.v4s .ing-quick-pill{background:var(--v4-white);border:1px solid var(--v4-rule-2);border-radius:999px;padding:9px 16px;font-family:var(--f4-body);font-size:var(--fs-14);font-weight:500;color:var(--v4-ink-2)}.v4s .ing-quick-pill b{color:var(--v4-ink);font-weight:700}.v4s .learn-jump{display:flex;gap:8px;flex-wrap:wrap}.v4s .learn-jump-pill{font-family:var(--f4-body);font-weight:600;font-size:var(--fs-12);color:var(--v4-ink-2);background:transparent;border:1px solid var(--v4-rule-2);border-radius:999px;padding:8px 15px;transition:border-color .15s,color .15s}.v4s .learn-jump-pill:hover{border-color:var(--v4-ink);color:var(--v4-ink)}.v4s .learn-chapter{padding:56px var(--page-pad);scroll-margin-top:70px}.v4s .learn-chapter[data-band=cloud]{background:var(--v4-cloud)}.v4s .learn-chapter[data-band=white]{background:var(--v4-white)}.v4s .learn-chapter-wrap{max-width:1120px;margin:0 auto}.v4s .learn-chapter-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding-bottom:22px;margin-bottom:26px;border-bottom:1px solid var(--v4-rule)}.v4s .learn-chapter-head-l{display:flex;align-items:flex-start;gap:16px}.v4s .learn-chapter-icon{flex:0 0 54px;width:54px;height:54px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;background:var(--accent-soft);color:var(--accent)}.v4s .learn-chapter-icon svg{width:28px;height:28px}.v4s .learn-chapter-head h2{font-family:var(--f4-display);font-weight:800;font-size:var(--fs-30);letter-spacing:-.024em;margin:0 0 4px;line-height:1.02}.v4s .learn-chapter-desc{font-family:var(--f4-body);font-size:var(--fs-14);line-height:1.5;color:var(--v4-ink-2);margin:0;max-width:52ch}.v4s .learn-chapter-head-r{display:flex;align-items:center;gap:22px;flex-shrink:0;padding-top:4px}.v4s .learn-stat{display:flex;flex-direction:column;line-height:1;text-align:center}.v4s .learn-stat b{font-family:var(--f4-display);font-weight:800;font-size:var(--fs-26);letter-spacing:-.02em;color:var(--accent)}.v4s .learn-stat span{font-family:var(--f4-body);font-weight:600;font-size:var(--fs-11);letter-spacing:.12em;text-transform:uppercase;color:var(--v4-ink-3);margin-top:5px}.v4s .learn-featured{position:relative;overflow:hidden;display:block;background:linear-gradient(120deg,var(--accent-soft) 0%,var(--v4-white) 78%);border:1px solid var(--v4-rule);border-radius:20px;padding:30px 32px;margin-bottom:22px;transition:transform .2s,border-color .2s,box-shadow .2s}.v4s .learn-featured:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 26px 46px -30px #18181a8c}.v4s .learn-featured:hover .ing-card-arrow{color:var(--v4-terra)}.v4s .learn-featured-body{position:relative;z-index:1;max-width:62ch}.v4s .learn-featured h3{font-family:var(--f4-display);font-weight:800;font-size:var(--fs-26);line-height:1.1;letter-spacing:-.02em;color:var(--v4-ink);margin:12px 0 10px}.v4s .learn-featured p{font-family:var(--f4-body);font-size:var(--fs-16);line-height:1.55;color:var(--v4-ink-2);margin:0 0 16px;max-width:56ch}.v4s .learn-kind-featured{background:var(--accent);color:#fff}.v4s .learn-featured-mark{position:absolute;right:-30px;bottom:-42px;width:220px;height:220px;color:var(--accent);opacity:.12;pointer-events:none}.v4s .learn-featured-mark svg{width:100%;height:100%}.v4s .view-all{display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--v4-ink);border:1px solid var(--v4-rule-2);font-family:var(--f4-body);font-weight:600;font-size:var(--fs-14);letter-spacing:0;text-transform:none;padding:11px 20px;border-radius:999px;white-space:nowrap;transition:border-color .2s,color .2s}.v4s .view-all:hover{border-color:var(--v4-ink);color:var(--v4-ink)}.v4s .learn-subhead{font-family:var(--f4-body);font-weight:700;font-size:var(--fs-11);letter-spacing:.16em;text-transform:uppercase;color:var(--v4-ink-3);margin-bottom:14px}.v4s .learn-kind-pill{display:inline-block;align-self:flex-start;font-family:var(--f4-body);font-weight:700;font-size:var(--fs-11);letter-spacing:.1em;text-transform:uppercase;padding:4px 10px;border-radius:999px}.v4s .learn-kind-guide{background:var(--accent);color:#fff}.v4s .learn-kind-answer{background:var(--v4-sage);color:var(--v4-forest)}.v4s .learn-guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.v4s .learn-guide-card{display:flex;flex-direction:column;gap:12px;background:var(--v4-white);border:1px solid var(--v4-rule);border-radius:16px;padding:24px;transition:transform .2s,border-color .2s,box-shadow .2s}.v4s .learn-guide-card:hover{transform:translateY(-4px);border-color:var(--v4-ink);box-shadow:0 22px 40px -28px #18181a80}.v4s .learn-guide-card:hover .ing-card-arrow{color:var(--v4-terra)}.v4s .learn-guide-card h3{font-family:var(--f4-display);font-weight:700;font-size:var(--fs-20);line-height:1.16;letter-spacing:-.015em;color:var(--v4-ink);margin:0}.v4s .learn-guide-card p{font-family:var(--f4-body);font-size:var(--fs-14);line-height:1.55;color:var(--v4-ink-2);margin:0;flex:1}.v4s .learn-card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:2px}.v4s .learn-card-time{font-family:var(--f4-body);font-weight:600;font-size:var(--fs-11);letter-spacing:.1em;text-transform:uppercase;color:var(--v4-ink-3)}.v4s .learn-answer-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.v4s .learn-answer-card{display:flex;flex-direction:column;gap:10px;background:var(--v4-white);border:1px solid var(--v4-rule);border-radius:14px;padding:20px;transition:transform .15s,border-color .15s,box-shadow .15s}.v4s .learn-answer-card:hover{transform:translateY(-3px);border-color:var(--v4-ink);box-shadow:0 22px 40px -28px #18181a80}.v4s .learn-answer-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.v4s .learn-answer-card h3{font-family:var(--f4-display);font-weight:700;font-size:var(--fs-16);line-height:1.2;letter-spacing:-.01em;color:var(--v4-ink);margin:0}.v4s .learn-answer-card p{font-family:var(--f4-body);font-size:var(--fs-12);line-height:1.5;color:var(--v4-ink-2);margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.v4s .ing-card-arrow{font-family:var(--f4-body);font-weight:600;font-size:var(--fs-14);letter-spacing:0;text-transform:none;color:var(--v4-forest)}@media (max-width:1080px){.v4s .learn-index-hero{padding:44px var(--page-pad) 36px}.v4s .learn-chapter{padding:44px var(--page-pad)}.v4s .learn-guide-grid,.v4s .learn-answer-cards{grid-template-columns:repeat(2,1fr)}}@media (max-width:760px){.v4s .learn-index-hero{padding:34px 20px 30px}.v4s .learn-index-hero h1{font-size:var(--fs-30)}.v4s .learn-chapter{padding:36px 20px}.v4s .learn-chapter-head{flex-direction:column;gap:16px}.v4s .learn-chapter-head-r{padding-top:0;gap:18px}.v4s .learn-chapter-head h2{font-size:var(--fs-26)}.v4s .learn-featured{padding:24px 22px}.v4s .learn-featured h3{font-size:var(--fs-22)}.v4s .learn-guide-grid,.v4s .learn-answer-cards{grid-template-columns:1fr}}