:root{--bg:#f6f8f8;--surface:#fff;--ink:#13202a;--muted:#64727d;--line:#d9e1e5;--brand:#23685e;--brand2:#2d7c70;--brandsoft:#e7f2ef;--dark:#10212b;--shadow:0 18px 48px rgba(18,32,42,.08);--r:22px}
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span{color:var(--brand)}.logo-mark{width:29px;height:29px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));position:relative}.logo-mark:before{content:"";position:absolute;left:7px;right:7px;top:14px;height:2px;background:#fff;transform:rotate(-7deg);border-radius:5px}.logo-mark:after{content:"";position:absolute;width:5px;height:5px;border-radius:50%;background:#fff;right:6px;top:8px}.nav-links{display:flex;gap:18px;font-size:.92rem;font-weight:750}.nav-links a{color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 17px;border-radius:13px;font-weight:850;border:1px solid transparent;cursor:pointer}.btn:hover{text-decoration:none;transform:translateY(-1px)}.btn-primary{background:var(--brand);color:white}.btn-secondary{background:#fff;color:var(--ink);border-color:var(--line)}.hero{padding:70px 0 42px}.eyebrow{display:inline-block;padding:7px 11px;border-radius:999px;background:var(--brandsoft);color:var(--brand);font-size:.82rem;font-weight:850}.hero h1{font-size:clamp(2.8rem,6vw,5.1rem);line-height:.98;letter-spacing:-.06em;margin:16px 0 17px;max-width:900px}.hero p{font-size:1.16rem;color:var(--muted);max-width:780px;margin:0}.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.meta{display:flex;gap:14px;flex-wrap:wrap;margin-top:22px;color:var(--muted);font-size:.87rem}.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:30px;align-items:start}.article{background:#fff;border:1px solid var(--line);border-radius:26px;padding:34px;box-shadow:var(--shadow)}.article h2{font-size:2rem;line-height:1.1;letter-spacing:-.04em;margin:38px 0 12px}.article h2:first-child{margin-top:0}.article h3{font-size:1.23rem;margin:28px 0 8px}.article p{margin:0 0 17px}.article ul,.article ol{padding-left:22px}.article li{margin:8px 0}.callout{background:var(--brandsoft);border:1px solid #cee2dc;border-radius:18px;padding:18px 20px;margin:22px 0}.callout strong{color:var(--brand)}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:20px 0}.stat{padding:17px;border-radius:17px;background:#f7faf9;border:1px solid var(--line)}.stat span{display:block;color:var(--muted);font-size:.8rem}.stat strong{font-size:1.25rem;letter-spacing:-.03em}.sidebar{position:sticky;top:92px}.side-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;margin-bottom:14px}.side-card h3{margin:0 0 8px;letter-spacing:-.03em}.side-card p{color:var(--muted);font-size:.91rem;margin:0 0 14px}.toc a{display:block;padding:7px 0;color:var(--muted);font-size:.9rem}.source-list{font-size:.87rem;color:var(--muted)}.source-list li{margin:7px 0}.note{font-size:.86rem;color:var(--muted)}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.guide-card{display:block;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;color:var(--ink)}.guide-card:hover{border-color:#a9c9c1;text-decoration:none;transform:translateY(-1px)}.guide-card b{display:block;margin-bottom:5px}.guide-card span{color:var(--muted);font-size:.9rem}.footer{margin-top:58px;padding:30px 0 48px;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem}.footer-links{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px}.checklist{list-style:none;padding:0!important}.checklist li{padding:12px 13px;border:1px solid var(--line);border-radius:12px;margin:8px 0;background:#fbfcfc}.checklist input{margin-right:9px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;margin:18px 0;background:#fff}th,td{padding:11px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}.calc{background:#fff;border:1px solid var(--line);border-radius:24px;padding:26px}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:13px}label{display:block;font-size:.86rem;font-weight:800;margin-bottom:5px}input,select{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:12px;font:inherit;background:#fff}.full{grid-column:1/-1}.result{display:none;margin-top:17px;padding:18px;border-radius:16px;background:var(--brandsoft);border:1px solid #cde0db}.result.show{display:block}.small{font-size:.86rem;color:var(--muted)}@media(max-width:860px){.layout{grid-template-columns:1fr}.sidebar{position:static}.nav-links{display:none}.stat-grid,.guide-grid,.form-grid{grid-template-columns:1fr}.full{grid-column:auto}.article{padding:24px}.hero{padding-top:48px}}