:root{--sg-blue:#2F6FEB;--sg-blue-lt:#93B8F2;--sg-blue-bg:#EAF1FE;--sg-amber:#EFA02A;--sg-amber-bg:#FFF1DA;
  --sg-green:#4A7A1E;--sg-green-bg:#E7F2D9;--sg-sheet:#FFF4DE;--sg-r:20px}
.sg-wrap{max-width:1192px;margin:0 auto}
.sg-preview{margin:4px 0 18px;padding:22px 24px;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:18px 34px}
.sg-preview h2{font-size:19px;margin:0 0 8px}
.sg-preview p{margin:0;line-height:1.6;color:var(--u-ink)}
.sg-choose{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.sg-choose a{display:flex;gap:10px;align-items:baseline;padding:9px 12px;border-radius:12px;background:var(--u-ground);
  color:var(--u-ink);text-decoration:none;font-size:14.5px;line-height:1.35;transition:background .2s,transform .2s}
.sg-choose a:hover{background:var(--sg-blue-bg);transform:translateX(3px)}
.sg-choose b{color:var(--u-navy);white-space:nowrap}
.sg-choose .q{color:var(--u-soft)}
.sg-ctitle{font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--u-soft);margin:0 0 8px}

.sg-card{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:22px;align-items:center;margin:0 0 22px;padding:22px 26px;
  border-radius:var(--sg-r);background:#0E2A47 linear-gradient(120deg,#0E2A47,#1B4B7A);color:#fff;text-decoration:none;
  box-shadow:var(--u-sh-up);position:relative;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease}
.sg-card:hover{transform:translateY(-3px)}
.sg-card .tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  background:rgba(255,255,255,.14);padding:4px 10px;border-radius:999px;margin-bottom:8px}
.sg-card h2{margin:0 0 6px;font-size:24px;color:#fff}
.sg-card p{margin:0;color:#D6E2EE;line-height:1.5}
.sg-card .chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.sg-card .chips span{font-size:12.5px;padding:4px 10px;border-radius:999px;background:#243F5E;color:#fff}
.sg-card .go{background:#fff;color:#0E2A47;font-weight:700;padding:12px 20px;border-radius:999px;white-space:nowrap}
.sg-card .mini{width:150px;height:112px;display:grid;place-items:center;border-radius:18px;background:#FFFFFF;color:#1F2933;box-shadow:inset 0 0 0 1px rgba(14,42,71,.08)}
.sg-card .mini .t{display:flex;gap:2px;font:800 26px/1 var(--u-font)}
.sg-card .mini .t i{font-style:normal;width:20px;text-align:center;animation:sg-pop 3.2s ease-in-out infinite}
.sg-card .mini .t i:nth-child(3){animation-delay:.3s}.sg-card .mini .t i:nth-child(4){animation-delay:.6s}.sg-card .mini .t i:nth-child(5){animation-delay:.9s}
@keyframes sg-pop{0%,70%,100%{transform:none;color:#1F2933}80%{transform:translateY(-6px);color:#2F6FEB}}

.sg-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-end;margin-bottom:14px}
.sg-lead{font-size:18px;line-height:1.55;max-width:720px;margin:6px 0 0}
.sg-rev{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;font-size:13.5px;color:var(--u-soft);margin:12px 0 22px}
.sg-rev .who{display:inline-flex;gap:8px;align-items:center;color:var(--u-ink);font-weight:600}
.sg-rev .who i{width:28px;height:28px;border-radius:50%;background:var(--sg-sheet);display:grid;place-items:center;font-style:normal;font-size:13px;color:var(--u-navy)}
.sg-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:28px;align-items:start}
.sg-rail{position:sticky;top:var(--sg-top,92px);padding:14px;display:grid;gap:4px}
.sg-rail a{display:flex;gap:10px;align-items:center;padding:8px 10px;border-radius:12px;color:var(--u-ink);text-decoration:none;font-size:14.5px;transition:background .2s}
.sg-rail a:hover{background:var(--u-ground)}
.sg-rail a.on{background:var(--sg-blue-bg);font-weight:700}
.sg-rail .nb{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-size:12.5px;font-weight:700;
  box-shadow:inset 0 0 0 1.5px var(--u-edge);flex:none;transition:background .3s,color .3s,box-shadow .3s}
.sg-rail a.done .nb{background:var(--sg-green);color:#fff;box-shadow:none}
.sg-rail .bar{height:4px;border-radius:4px;background:var(--u-hair);margin:8px 10px 2px;overflow:hidden}
.sg-rail .bar i{display:block;height:100%;width:0;background:var(--sg-green);transition:width .5s ease}
.sg-rail .lbl{font-size:12.5px;color:var(--u-soft);padding:0 10px}

.sg-hero{padding:28px 30px;margin-bottom:22px;display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:26px;align-items:center;
  background:linear-gradient(180deg,#FFF8EA,#FFFFFF)}
.sg-hero h2{font-size:26px;margin:0 0 10px}
.sg-hero p{margin:0 0 10px;line-height:1.6}
.sg-hero ul{margin:8px 0 0;padding-left:20px;line-height:1.7}
.sg-zoom{position:relative;height:250px;border-radius:18px;background:#fff;box-shadow:var(--u-sh);overflow:hidden}
.sg-zoom .lv{position:absolute;inset:0;display:grid;place-items:center;align-content:center;gap:10px;animation:sg-zoom 12s ease-in-out infinite;opacity:0}
.sg-zoom .lv:nth-child(2){animation-delay:4s}.sg-zoom .lv:nth-child(3){animation-delay:8s}
@keyframes sg-zoom{0%{opacity:0;transform:scale(.6)}6%,30%{opacity:1;transform:scale(1)}36%,100%{opacity:0;transform:scale(1.6)}}
.sg-zoom .sq{display:grid;gap:3px}
.sg-zoom .lab{font-weight:800;font-size:22px;color:var(--u-navy)}
.sg-zoom .sub{font-size:13.5px;color:var(--u-soft)}
.sg-zoom .one{width:120px;height:120px;border-radius:6px;background:var(--sg-blue)}
.sg-zoom .tenths{grid-template-columns:repeat(10,11px)}.sg-zoom .tenths i{height:120px;border-radius:2px;background:var(--sg-blue-lt)}
.sg-zoom .tenths i:first-child{background:var(--sg-blue)}
.sg-zoom .hund{grid-template-columns:repeat(10,10px);gap:2px}.sg-zoom .hund i{height:10px;border-radius:2px;background:var(--sg-blue-lt)}
.sg-zoom .hund i:first-child{background:var(--sg-blue)}

.sg-step{padding:26px 28px;margin-bottom:22px;scroll-margin-top:92px;opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.sg-step.in{opacity:1;transform:none}
.sg-sh{display:flex;gap:16px;align-items:flex-start;margin-bottom:16px}
.sg-n{flex:none;width:40px;height:40px;border-radius:12px;background:var(--u-navy);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}
.sg-sh h2{margin:2px 0 6px;font-size:23px}
.sg-big{margin:0;font-size:16.5px;line-height:1.55;color:var(--u-ink)}
.sg-play{border-radius:16px;background:var(--u-ground);padding:22px;margin:4px 0 16px}
.sg-hint{font-size:13.5px;color:var(--u-soft);margin:0 0 12px;display:flex;gap:6px;align-items:center}
.sg-hint::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--sg-blue);animation:sg-blink 1.6s ease-in-out infinite}
@keyframes sg-blink{50%{opacity:.25}}
.sg-read{min-height:52px;margin-top:14px;padding:12px 16px;border-radius:12px;background:#fff;font-size:16px;line-height:1.5;box-shadow:var(--u-sh)}
.sg-read b{color:var(--sg-blue)}
.sg-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.sg-links a{display:inline-flex;gap:8px;align-items:center;padding:9px 14px;border-radius:999px;font-size:14px;font-weight:600;text-decoration:none;
  color:var(--u-navy);box-shadow:inset 0 0 0 1.5px var(--u-edge);transition:background .2s}
.sg-links a:hover{background:var(--u-ground)}
.sg-links a.pr{background:var(--u-navy);color:#fff;box-shadow:none}

.sg-try{border-radius:16px;padding:18px 20px;box-shadow:inset 0 0 0 1.5px var(--u-hair)}
.sg-try .lab{font-size:12.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--u-soft);margin-bottom:6px}
.sg-try .q{font-size:17px;line-height:1.5;margin:0 0 12px}
.sg-opts{display:flex;flex-wrap:wrap;gap:8px}
.sg-opts button{all:unset;cursor:pointer;min-width:64px;text-align:center;padding:10px 16px;border-radius:12px;background:#fff;font:700 17px/1.2 var(--u-font);
  box-shadow:inset 0 0 0 1.5px var(--u-edge);transition:background .2s,box-shadow .2s,transform .2s}
.sg-opts button:hover{transform:translateY(-2px)}
.sg-opts button.yes{background:var(--sg-green-bg);box-shadow:inset 0 0 0 2px var(--sg-green);animation:sg-yes .5s ease}
.sg-opts button.not{background:var(--u-tried);box-shadow:inset 0 0 0 1.5px var(--u-tried-edge)}
@keyframes sg-yes{40%{transform:scale(1.12)}}
.sg-fb{margin-top:12px;font-size:15.5px;line-height:1.5;min-height:1px}
.sg-fb.y{color:var(--sg-green)}
.sg-fb b{font-weight:800}

.sg-ex{padding:24px 26px;margin-bottom:18px}
.sg-ex .tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.sg-ex .tags span{font-size:12.5px;font-weight:700;padding:4px 10px;border-radius:999px;background:var(--u-ground);color:var(--u-soft)}
.sg-ex .tags span.k{background:var(--sg-blue-bg);color:var(--u-navy)}
.sg-ex .stem{font-size:17.5px;line-height:1.55;margin:0 0 14px}
.sg-ex .reveal{display:flex;gap:8px;flex-wrap:wrap}
.sg-ex .steps{margin:14px 0 0;padding:0;list-style:none;counter-reset:s}
.sg-ex .steps li{counter-increment:s;display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;padding:10px 0;border-top:1px solid var(--u-hair);
  opacity:0;transform:translateX(-10px);transition:opacity .45s ease,transform .45s ease;font-size:16px;line-height:1.5}
.sg-ex .steps li::before{content:counter(s);width:26px;height:26px;border-radius:50%;background:var(--u-navy);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:700}
.sg-ex .steps li.in{opacity:1;transform:none}
.sg-ex .steps li[hidden]{display:none}
.sg-ex .ans{margin-top:10px;padding:12px 16px;border-radius:12px;background:var(--sg-green-bg);font-weight:700;color:var(--sg-green);display:none}
.sg-ex .ans.in{display:block;animation:sg-yes .5s ease}
.sg-ex .hint{display:none;margin-top:12px;padding:12px 16px;border-radius:12px;background:var(--sg-sheet);font-size:15.5px}
.sg-ex .hint.in{display:block}
.sg-ex .w{font-family:var(--u-font);font-weight:700;letter-spacing:.01em}
.sg-ex .w .hl{background:var(--sg-blue-bg);border-radius:4px;padding:0 3px}

.sg-quiz .qn{padding:16px 0;border-top:1px solid var(--u-hair)}
.sg-quiz .qn:first-of-type{border-top:0}
.sg-score{display:flex;gap:16px;align-items:center;margin-top:16px;padding:16px 18px;border-radius:14px;background:var(--u-ground)}
.sg-score .ring{--p:0;width:64px;height:64px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:800;font-size:18px;
  background:conic-gradient(var(--sg-green) calc(var(--p)*1%),#E3E7EA 0);transition:--p 1s}
.sg-score .ring span{width:50px;height:50px;border-radius:50%;background:var(--u-ground);display:grid;place-items:center}
.sg-next{display:grid;gap:8px;margin-top:10px}
.sg-next a{padding:10px 14px;border-radius:12px;background:#fff;text-decoration:none;color:var(--u-navy);font-weight:600;box-shadow:var(--u-sh)}

.sg-parent{padding:22px 26px;margin:22px 0}
.sg-parent .tag{display:inline-block;font-size:12.5px;font-weight:700;color:#2F6B1A;background:var(--sg-green-bg);padding:4px 10px;border-radius:999px;margin-bottom:8px}
.sg-parent p{margin:6px 0;line-height:1.6}
.sg-sep{margin:34px 0 14px;font-size:24px}
.sg-sep small{display:block;font-size:15px;font-weight:500;color:var(--u-soft);margin-top:4px}

@media (max-width:900px){
  .sg-preview{grid-template-columns:1fr;padding:18px}
  .sg-card{grid-template-columns:1fr;gap:14px;padding:20px}
  .sg-card .mini{display:none}
  .sg-card .go{justify-self:start}
  .sg-layout{grid-template-columns:minmax(0,1fr);gap:12px}
  .sg-rail{position:sticky;top:var(--sg-top,64px);z-index:5;display:flex;overflow-x:auto;gap:6px;padding:8px;scrollbar-width:none}
  .sg-rail::-webkit-scrollbar{display:none}
  .sg-rail a{flex:none;font-size:13.5px;padding:7px 10px}
  .sg-rail .bar,.sg-rail .lbl{display:none}
  .sg-hero{grid-template-columns:1fr;padding:20px}
  .sg-zoom{height:210px}
  .sg-step,.sg-ex{padding:20px 18px}
  .sg-play{padding:16px 12px}
}
@media (max-width:760px){
  .wrap:has(.sg-layout){padding-left:16px;padding-right:16px}
  .sg-rail{position:sticky;top:var(--sg-top,0px);margin:0 -16px;border-radius:0;background:rgba(246,243,238,.96);
    backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--u-hair);
    box-shadow:none;padding:8px 16px}
}
@media (prefers-reduced-motion:reduce){
  .sg-step{opacity:1;transform:none}
  .sg-zoom .lv{animation:none;opacity:0}.sg-zoom .lv:nth-child(2){opacity:1}
  .sg-card .mini .t i{animation:none}
}

.sg-preview1{display:block;padding:18px 22px}
.sg-preview1 p{margin:0;line-height:1.6;max-width:920px}
.sg-inl{color:var(--u-navy);font-weight:700;text-decoration:underline;text-underline-offset:3px;text-decoration-skip-ink:none;white-space:nowrap}
.cols+.sg-card,.sg-card{margin-top:26px}
.sg-back{grid-template-columns:minmax(0,1fr) auto}
.sg-kick{margin:0 0 2px;font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--u-soft)}
.sg-sh h2{margin-top:0}
@media (max-width:900px){.sg-back{grid-template-columns:1fr}}
.sg-lead{margin-bottom:22px}

.sg-btn{all:unset;cursor:pointer;padding:9px 16px;border-radius:999px;background:#fff;font-weight:700;font-size:14.5px;color:var(--u-navy);
  box-shadow:inset 0 0 0 1.5px var(--u-edge);transition:background .2s,transform .2s}
.sg-btn:hover{transform:translateY(-2px)}
.sg-btn.on{background:var(--u-navy);color:#fff;box-shadow:none}
.sg-btn:focus-visible{outline:3px solid var(--sg-amber);outline-offset:2px}