.ogs{--ogs-bg:#f5f7f7;--ogs-surface:#fff;--ogs-ink:#0f172a;--ogs-ink-2:#475569;--ogs-ink-3:#94a3b8;--ogs-line:rgba(15,23,42,.08);--ogs-brand:#0f766e;--ogs-brand-600:#0d9488;--ogs-brand-50:#ecfdf5;--ogs-radius:18px;--ogs-shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px -14px rgba(15,23,42,.14);--ogs-shadow-hover:0 2px 4px rgba(15,23,42,.05),0 18px 40px -18px rgba(15,23,42,.22);--ogs-ease:cubic-bezier(0.16,1,0.3,1);min-height:100dvh;display:flex;flex-direction:column;background:var(--ogs-bg);color:var(--ogs-ink);font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Source Han Sans SC,sans-serif;-webkit-font-smoothing:antialiased}.ogs *,.ogs :after,.ogs :before{box-sizing:border-box}.ogs-wrap{width:100%;max-width:1160px;margin:0 auto;padding:0 20px}.ogs-header{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:hsla(0,0%,100%,.84);-webkit-backdrop-filter:saturate(180%) blur(14px);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--ogs-line)}.ogs-header__bar{justify-content:space-between;gap:16px;padding:12px 0;flex-wrap:wrap}.ogs-brand,.ogs-header__bar{display:flex;align-items:center}.ogs-brand{gap:12px;text-decoration:none;color:inherit;min-width:0}.ogs-brand__logo{border-radius:14px;object-fit:contain;background:#fff;border:1px solid var(--ogs-line)}.ogs-brand__logo,.ogs-brand__mark{width:46px;height:46px;flex-shrink:0}.ogs-brand__mark{border-radius:14px;display:grid;place-items:center;font-size:20px;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--ogs-brand-600),#115e59)}.ogs-brand__text{min-width:0}.ogs-brand__name{display:block;font-size:16px;font-weight:600;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:42vw}.ogs-brand__meta{display:block;font-size:12px;color:var(--ogs-ink-3);margin-top:2px}.ogs-nav{display:flex;gap:2px;flex-wrap:wrap}.ogs-nav__item{padding:8px 14px;border-radius:10px;font-size:14px;color:var(--ogs-ink-2);text-decoration:none;white-space:nowrap;transition:background .2s var(--ogs-ease),color .2s var(--ogs-ease)}.ogs-nav__item:hover{background:var(--ogs-brand-50);color:var(--ogs-brand)}.ogs-nav__item.is-active{background:var(--ogs-brand);color:#fff;font-weight:500}.ogs-main{flex:1 1;padding-bottom:48px}.ogs-hero{padding:44px 0 10px}.ogs-hero__grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);grid-gap:28px;gap:28px;align-items:center}@media (max-width:900px){.ogs-hero__grid{grid-template-columns:1fr;gap:20px}}.ogs-hero__title{font-size:clamp(24px,3.4vw,34px);line-height:1.25;letter-spacing:-.022em;font-weight:650;margin:0 0 12px}.ogs-hero__desc{color:var(--ogs-ink-2);line-height:1.85;font-size:14.5px;max-width:62ch;margin:0 0 20px;white-space:pre-wrap}.ogs-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}.ogs-badge{font-size:12px;padding:5px 11px;border-radius:999px;background:rgba(15,118,110,.08);color:#0f766e;border:1px solid rgba(15,118,110,.15)}.ogs-badge--muted{background:rgba(15,23,42,.04);color:var(--ogs-ink-2);border-color:var(--ogs-line)}.ogs-cta-row{display:flex;gap:12px;flex-wrap:wrap}.ogs-btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:12px;font-size:14px;font-weight:500;text-decoration:none;border:1px solid transparent;cursor:pointer;font-family:inherit;transition:transform .18s var(--ogs-ease),box-shadow .18s var(--ogs-ease),background .18s var(--ogs-ease),border-color .18s var(--ogs-ease),color .18s var(--ogs-ease)}.ogs-btn:active{transform:scale(.98)}.ogs-btn--primary{background:var(--ogs-brand);color:#fff;box-shadow:0 8px 20px -10px rgba(15,118,110,.65)}.ogs-btn--primary:hover{background:var(--ogs-brand-600)}.ogs-btn--ghost{background:#fff;color:var(--ogs-ink);border-color:var(--ogs-line)}.ogs-btn--ghost:hover{border-color:rgba(15,118,110,.35);color:var(--ogs-brand)}.ogs-btn--sm{padding:8px 14px;font-size:13px;border-radius:10px}.ogs-btn:disabled{opacity:.55;cursor:not-allowed}.ogs-stat-card{background:var(--ogs-surface);border:1px solid var(--ogs-line);border-radius:var(--ogs-radius);padding:22px;box-shadow:var(--ogs-shadow)}.ogs-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:18px;gap:18px}.ogs-stat__num{font-size:26px;font-weight:650;letter-spacing:-.02em;color:var(--ogs-brand);line-height:1.1}.ogs-stat__label{font-size:12.5px;color:var(--ogs-ink-3);margin-top:5px}.ogs-section{padding:26px 0 0}.ogs-section__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px}.ogs-h2{font-size:19px;font-weight:620;letter-spacing:-.015em;margin:0}.ogs-link{font-size:13.5px;color:var(--ogs-brand);text-decoration:none}.ogs-link:hover{text-decoration:underline}.ogs-grid{display:grid;grid-gap:16px;gap:16px}.ogs-grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.ogs-grid--4{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}.ogs-stack{display:flex;flex-direction:column;gap:14px}.ogs-entry{display:block;background:var(--ogs-surface);border:1px solid var(--ogs-line);border-radius:var(--ogs-radius);padding:22px;text-decoration:none;color:inherit;box-shadow:var(--ogs-shadow);transition:transform .22s var(--ogs-ease),box-shadow .22s var(--ogs-ease),border-color .22s var(--ogs-ease)}.ogs-entry:hover{transform:translateY(-3px);box-shadow:var(--ogs-shadow-hover);border-color:rgba(15,118,110,.22)}.ogs-entry__icon{width:40px;height:40px;border-radius:12px;background:var(--ogs-brand-50);color:var(--ogs-brand);display:grid;place-items:center;margin-bottom:14px}.ogs-entry__title{font-size:15.5px;font-weight:600;margin-bottom:6px}.ogs-entry__desc{font-size:13px;color:var(--ogs-ink-3);line-height:1.7}.ogs-card{background:var(--ogs-surface);border:1px solid var(--ogs-line);border-radius:var(--ogs-radius);padding:20px;box-shadow:var(--ogs-shadow);transition:transform .22s var(--ogs-ease),box-shadow .22s var(--ogs-ease)}.ogs-card:hover{transform:translateY(-2px);box-shadow:var(--ogs-shadow-hover)}.ogs-card__top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;flex-wrap:wrap}.ogs-card__title{font-size:15.5px;font-weight:600}.ogs-card__code{font-size:12px;color:var(--ogs-ink-3);font-weight:400;margin-left:8px}.ogs-card__meta{font-size:12.5px;color:var(--ogs-ink-3);margin-top:6px;line-height:1.75}.ogs-card__foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px;flex-wrap:wrap}.ogs-pill{font-size:12px;padding:5px 10px;border-radius:999px;background:var(--ogs-brand-50);color:var(--ogs-brand);font-weight:500;white-space:nowrap}.ogs-pill--muted{background:rgba(15,23,42,.05);color:var(--ogs-ink-2)}.ogs-price{font-size:15px;font-weight:600}.ogs-price small{font-size:12px;color:var(--ogs-ink-3);font-weight:400;margin-left:4px}.ogs-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));grid-gap:12px;gap:12px}.ogs-gallery img{width:100%;height:140px;object-fit:cover;border-radius:14px;border:1px solid var(--ogs-line);transition:transform .35s var(--ogs-ease)}.ogs-gallery img:hover{transform:scale(1.02)}.ogs-tags{display:flex;flex-wrap:wrap;gap:8px}.ogs-tag{font-size:12.5px;padding:6px 12px;border-radius:999px;background:#fff;border:1px solid var(--ogs-line);color:var(--ogs-ink-2)}.ogs-empty{background:var(--ogs-surface);border:1px dashed rgba(15,23,42,.14);border-radius:var(--ogs-radius);padding:30px 20px;text-align:center;color:var(--ogs-ink-3);font-size:14px}.ogs-note{background:var(--ogs-brand-50);border:1px solid rgba(15,118,110,.16);border-radius:14px;padding:14px 16px;font-size:13px;color:#115e59;line-height:1.8}.ogs-crumb{font-size:13px;color:var(--ogs-ink-3);margin-bottom:18px}.ogs-crumb a{color:var(--ogs-ink-2);text-decoration:none}.ogs-crumb a:hover{color:var(--ogs-brand)}.ogs-info__row{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid var(--ogs-line);font-size:13.5px}.ogs-info__row:last-child{border-bottom:0}.ogs-info__k{color:var(--ogs-ink-3);flex-shrink:0}.ogs-info__v{text-align:right;word-break:break-all}.ogs-course{display:block;background:var(--ogs-surface);border:1px solid var(--ogs-line);border-radius:var(--ogs-radius);overflow:hidden;text-decoration:none;color:inherit;box-shadow:var(--ogs-shadow);transition:transform .22s var(--ogs-ease),box-shadow .22s var(--ogs-ease)}.ogs-course:hover{transform:translateY(-3px);box-shadow:var(--ogs-shadow-hover)}.ogs-course__cover{width:100%;height:150px;object-fit:cover;display:block;background:#eef2f1}.ogs-course__placeholder{width:100%;height:150px;display:grid;place-items:center;background:linear-gradient(135deg,#eef7f5,#e2eeec);color:var(--ogs-ink-3);font-size:13px}.ogs-course__body{padding:16px}.ogs-page-title{font-size:clamp(22px,3vw,28px);font-weight:650;letter-spacing:-.02em;margin:0 0 8px}.ogs-page-desc{font-size:14px;color:var(--ogs-ink-2);line-height:1.8;margin:0 0 22px;max-width:68ch}.ogs-footer{margin-top:auto;background:#0b1f1d;color:hsla(0,0%,100%,.72);padding:34px 0 24px}.ogs-footer__row{display:flex;gap:44px;flex-wrap:wrap;margin-bottom:18px}.ogs-footer__brand{color:#fff;font-weight:600;font-size:15px;margin-bottom:6px}.ogs-footer__meta{font-size:12.5px;color:hsla(0,0%,100%,.55);line-height:1.9}.ogs-footer__legal{font-size:12px;line-height:1.85;color:hsla(0,0%,100%,.45);border-top:1px solid hsla(0,0%,100%,.1);padding-top:16px;margin:0}@keyframes ogs-rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.ogs-rise{animation:ogs-rise .55s var(--ogs-ease) both;animation-delay:calc(var(--i, 0) * 60ms)}@media (prefers-reduced-motion:reduce){.ogs-rise{animation:none}.ogs-btn,.ogs-card,.ogs-course,.ogs-entry,.ogs-gallery img{transition:none}.ogs-card:hover,.ogs-course:hover,.ogs-entry:hover,.ogs-gallery img:hover{transform:none}}