.lp{--green:#003b29;--green-2:#00281c;--ink:#003b29;--text:rgba(0,59,41,.86);--muted:rgba(0,59,41,.7);--gold:#a16207;--gold-deep:#854d0e;--gold-glow:#d4af37;--gold-tint:rgba(212,175,55,.14);--gold-line:rgba(161,98,7,.35);--bg:#f7fff6;--card:#fff;--border:rgba(0,59,41,.12);--soft:rgba(0,59,41,.04);--r:16px;--r-md:12px;--r-sm:8px;--shadow:0 1px 2px rgba(0,59,41,.06),0 8px 24px rgba(0,59,41,.07);--stone:var(--text);--font:"yekanBakh","Vazirmatn","Vazir",Tahoma,system-ui,sans-serif;--gutter:16px;--wrap:1160px}.lp *{box-sizing:border-box}.lp{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:1.0625rem;line-height:1.95;font-weight:400;text-rendering:optimizeLegibility}.lp img,.lp svg{max-width:100%;display:block}.lp a{color:var(--gold-deep);text-underline-offset:4px;text-decoration-thickness:1px}.lp a:hover{color:var(--gold)}.lp :focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:6px}.lp .wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}.lp .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 22px;border-radius:var(--r-md);font:inherit;font-weight:700;text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:background-color .2s,color .2s,border-color .2s}.lp .btn-green{background:var(--green);color:#f7fff6}.lp .btn-green:hover{background:var(--green-2);color:#fff}.lp .btn-gold{background:var(--gold);color:#fff}.lp .btn-gold:hover{background:var(--gold-deep);color:#fff}.lp .btn-ghost{background:transparent;color:var(--green);border-color:var(--border)}.lp .btn-ghost:hover{border-color:var(--gold);color:var(--gold-deep)}.lp .btn-light{background:#f7fff6;color:var(--green)}.lp .btn-light:hover{background:#fff;color:var(--green)}.lp .btn-outline-light{border-color:rgba(247,255,246,.5);color:#f7fff6}.lp .btn-outline-light:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}.lp .btn svg{width:20px;height:20px;flex:none}.lp .hero{background:radial-gradient(900px 380px at 85% -10%,rgba(212,175,55,.22),transparent 60%),linear-gradient(180deg,#003b29,#00281c);color:#f7fff6;padding-block:28px 40px}.lp .crumbs{font-size:.85rem;color:#d6d3d1;margin:0 0 18px;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:6px}.lp .crumbs li+li:before{content:"‹";margin-inline-end:6px;opacity:.6}.lp .crumbs a{color:#e7e5e4;text-decoration:none}.lp .crumbs a:hover{color:#fff;text-decoration:underline}.lp .eyebrow{display:inline-block;color:#e6c76a;font-weight:700;font-size:.9rem;letter-spacing:0;margin-bottom:8px}.lp .hero h1{margin:0 0 14px;font-size:clamp(1.75rem,1.2rem + 2.6vw,3rem);line-height:1.45;font-weight:800;text-wrap:balance}.lp .hero .lead{margin:0 0 24px;max-width:62ch;color:#e7e5e4;font-size:1.0625rem}.lp .cta-row{display:flex;flex-wrap:wrap;gap:12px}.lp .cta-row .btn{flex:1 1 220px}.lp .meta-line{margin-top:18px;font-size:.85rem;color:#d6d3d1}.lp .trust{margin-top:-22px;position:relative;z-index:2}.lp .trust ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}.lp .trust li{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:14px;display:flex;gap:10px;align-items:flex-start;box-shadow:var(--shadow);font-size:.9rem;line-height:1.7}.lp .trust svg{width:26px;height:26px;color:var(--gold);flex:none;margin-top:2px}.lp .trust b{display:block;color:var(--ink);font-size:.95rem}.lp .trust span{color:var(--muted)}.lp .page{display:block;padding-block:36px 24px}.lp .toc{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:6px 16px;margin-bottom:28px}.lp .toc summary{cursor:pointer;min-height:48px;display:flex;align-items:center;font-weight:700;list-style:none}.lp .toc summary::-webkit-details-marker{display:none}.lp .toc summary:after{content:"";margin-inline-start:auto;width:10px;height:10px;border:solid var(--stone);border-width:0 2px 2px 0;transform:rotate(45deg);transition:transform .2s}.lp .toc[open] summary:after{transform:rotate(-135deg)}.lp .toc ol{margin:0 0 10px;padding:0;list-style:none;counter-reset:t}.lp .toc li{counter-increment:t}.lp .toc a{display:flex;gap:8px;min-height:40px;align-items:center;color:var(--stone);text-decoration:none;font-size:.95rem;line-height:1.5;padding-block:4px}.lp .toc a:before{content:counter(t,persian) ".";color:var(--gold);font-weight:700;min-width:1.6em}.lp .toc a:hover,.lp .toc a[aria-current=true]{color:var(--gold-deep);font-weight:700}.lp .article{min-width:0}.lp .article h2{font-size:clamp(1.4rem,1.15rem + 1.1vw,1.95rem);line-height:1.5;margin:2.6rem 0 .8rem;padding-top:.4rem;font-weight:800;text-wrap:balance;position:relative}.lp .article h2:before{content:"";display:block;width:44px;height:3px;background:var(--gold);border-radius:3px;margin-bottom:12px}.lp .article h3{font-size:1.18rem;margin:1.8rem 0 .4rem;font-weight:700}.lp .article p{margin:0 0 1.15rem;max-width:72ch;color:var(--stone)}.lp .article ol,.lp .article ul{margin:0 0 1.2rem;padding-inline-start:1.4rem;max-width:72ch;color:var(--stone)}.lp .article li{margin-bottom:.45rem}.lp .article strong{color:var(--ink)}.lp .article .lede{font-size:1.15rem;color:var(--ink)}.lp .note{border-inline-start:4px solid var(--gold);background:var(--gold-tint);border-radius:var(--r-sm);padding:14px 18px;margin:0 0 1.4rem;max-width:72ch}.lp .note p{margin:0;color:var(--ink)}.lp .tablewrap{overflow-x:auto;margin:0 0 1.4rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--card);-webkit-overflow-scrolling:touch}.lp .tablewrap table{border-collapse:collapse;width:100%;min-width:520px;font-size:.95rem;line-height:1.7}.lp .tablewrap td,.lp .tablewrap th{padding:12px 14px;text-align:start;border-bottom:1px solid var(--border);vertical-align:top}.lp .tablewrap th{background:var(--soft);color:var(--ink);font-weight:700;white-space:nowrap}.lp .tablewrap tr:last-child td{border-bottom:0}.lp .tiles{display:grid;grid-template-columns:1fr;gap:12px;margin:1.2rem 0 2rem}.lp .tile{display:flex;gap:14px;align-items:center;background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--ink);min-height:84px;transition:border-color .2s,box-shadow .2s,transform .2s}.lp .tile:hover{border-color:var(--gold);box-shadow:var(--shadow);color:var(--ink)}.lp .tile .ic{width:48px;height:48px;border-radius:12px;background:var(--soft);color:var(--green);display:grid;place-items:center;flex:none}.lp .tile .ic svg{width:26px;height:26px}.lp .tile b{display:block;font-size:1.02rem;line-height:1.5}.lp .tile small{display:block;color:var(--muted);font-size:.85rem;line-height:1.6}.lp .tile .go{margin-inline-start:auto;color:var(--gold);flex:none}.lp .tile .go svg{width:20px;height:20px}.lp .slot-title{font-weight:800;font-size:1.1rem;margin:2rem 0 .3rem}.lp .faq{margin:1rem 0 2rem;display:grid;gap:10px}.lp .faq details{background:var(--card);border:1px solid var(--border);border-radius:var(--r-sm);padding:0 18px}.lp .faq summary{cursor:pointer;min-height:56px;display:flex;align-items:center;gap:12px;font-weight:700;list-style:none;line-height:1.6;padding-block:10px}.lp .faq summary::-webkit-details-marker{display:none}.lp .faq summary:after{content:"";margin-inline-start:auto;flex:none;width:10px;height:10px;border:solid var(--gold);border-width:0 2px 2px 0;transform:rotate(45deg);transition:transform .2s}.lp .faq details[open] summary:after{transform:rotate(-135deg)}.lp .faq details[open]{border-color:var(--gold-line)}.lp .faq .ans{padding:0 0 14px;color:var(--stone)}.lp .faq .ans p{margin:0 0 .8rem}.lp .related{background:var(--soft);border-top:1px solid var(--border);padding-block:36px}.lp .related h2{margin:0 0 16px;font-size:1.35rem}.lp .related .grid{display:grid;grid-template-columns:1fr;gap:12px}.lp .related a{display:block;background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--ink);min-height:84px;transition:border-color .2s}.lp .related a:hover{border-color:var(--gold)}.lp .related b{display:block;margin-bottom:4px}.lp .related span{color:var(--muted);font-size:.9rem;line-height:1.7;display:block}.lp .band{background:linear-gradient(135deg,#003b29,#00281c);color:#f7fff6;padding-block:38px}.lp .band .wrap{display:grid;gap:22px}.lp .band h2{margin:0 0 6px;font-size:1.5rem;line-height:1.5}.lp .band p{margin:0;color:#e7e5e4}.lp .band address{font-style:normal;color:#e7e5e4;line-height:1.9}.lp .band .cta-row .btn{flex:1 1 200px}.lp .calc{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:20px;margin:0 0 2rem;box-shadow:var(--shadow)}.lp .calc h3{margin:0 0 4px}.lp .calc .grid{display:grid;grid-template-columns:1fr;gap:14px;margin:16px 0}.lp .calc label{display:block;font-weight:700;font-size:.95rem;margin-bottom:4px}.lp .calc input{width:100%;min-height:48px;border:1.5px solid var(--border);border-radius:var(--r-sm);padding:8px 14px;font:inherit;background:var(--bg);color:var(--ink);direction:ltr;text-align:right}.lp .calc input:focus{border-color:var(--gold);outline:none;box-shadow:0 0 0 3px var(--gold-tint)}.lp .calc .hint{display:block;color:var(--muted);font-size:.82rem;line-height:1.6;margin-top:3px}.lp .calc .out{background:var(--gold-tint);border:1px solid var(--gold-line);border-radius:var(--r-sm);padding:16px 18px}.lp .calc .out dl{margin:0;display:grid;grid-template-columns:1fr auto;gap:6px 14px}.lp .calc .out dt{color:var(--stone)}.lp .calc .out dd{margin:0;font-weight:700;direction:ltr;text-align:left}.lp .calc .out .total dd,.lp .calc .out .total dt{font-size:1.15rem;color:var(--ink);padding-top:8px;border-top:1px dashed var(--gold-line)}.lp .calc .err{color:#b91c1c;font-size:.9rem;min-height:1.4em}@media (min-width:640px){.lp{--gutter:24px}.lp .trust ul{grid-template-columns:repeat(4,1fr)}.lp .calc .grid,.lp .related .grid,.lp .tiles{grid-template-columns:repeat(2,1fr)}}@media (min-width:1024px){.lp .hero{padding-block:44px 64px}.lp .page{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}.lp .toc{order:2;position:sticky;top:var(--hh,170px);margin:0;max-height:calc(100vh - var(--hh,170px) - 20px);overflow:auto}.lp .toc summary{pointer-events:none}.lp .toc summary:after{display:none}.lp .article{order:1}.lp .related .grid,.lp .tiles{grid-template-columns:repeat(3,1fr)}.lp .band .wrap{grid-template-columns:1.3fr 1fr;align-items:center}}@media (max-width:360px){.lp{font-size:1rem}.lp .btn{padding-inline:16px}}@media (prefers-reduced-motion:reduce){.lp *{transition:none!important;scroll-behavior:auto!important}}@counter-style persian{system:numeric;symbols:"۰" "۱" "۲" "۳" "۴" "۵" "۶" "۷" "۸" "۹"}.lp .band .cta-row .btn,.lp .hero .cta-row .btn{flex:1 1 220px;max-width:320px}@media (max-width:480px){.lp .band .cta-row .btn,.lp .hero .cta-row .btn{max-width:none}}.lp .intent{margin:-8px 0 0;padding-block:26px 0}.lp .intent h2{font-size:1.2rem;margin:0 0 4px;color:var(--green)}.lp .intent p.sub{margin:0 0 14px;color:var(--muted);font-size:.95rem;line-height:1.8}.lp .intent ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr;gap:10px}.lp .intent a{display:flex;gap:12px;align-items:flex-start;background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:14px 16px;text-decoration:none;color:var(--green);min-height:72px;transition:border-color .2s,box-shadow .2s}.lp .intent a:hover{border-color:var(--gold);box-shadow:var(--shadow)}.lp .intent .n{flex:none;width:34px;height:34px;border-radius:50%;background:var(--gold-tint);color:var(--gold-deep);display:grid;place-items:center;font-weight:800}.lp .intent b{display:block;line-height:1.6}.lp .intent small{display:block;color:var(--muted);line-height:1.7;font-size:.88rem}@media (min-width:768px){.lp .intent ul{grid-template-columns:repeat(3,1fr)}}.lp .tool{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:20px;margin:0 0 2rem;box-shadow:var(--shadow);position:relative;overflow:hidden}.lp .tool:before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--gold)}.lp .tool .tk{display:inline-block;font-size:.8rem;font-weight:700;color:var(--gold-deep);background:var(--gold-tint);padding:2px 10px;border-radius:999px;margin-bottom:6px}.lp .tool h3{margin:0 0 4px;font-size:1.2rem;color:var(--green)}.lp .tool .sub{margin:0 0 14px;color:var(--muted);font-size:.93rem;line-height:1.8}.lp .tool .grid{display:grid;grid-template-columns:1fr;gap:14px;margin:14px 0}.lp .tool label{display:block;font-weight:700;font-size:.95rem;margin-bottom:4px;color:var(--green)}.lp .tool input,.lp .tool select{width:100%;min-height:48px;border:1.5px solid var(--border);border-radius:var(--r-md);padding:8px 14px;font:inherit;background:var(--bg);color:var(--ink)}.lp .tool input.num{direction:ltr;text-align:right}.lp .tool input:focus,.lp .tool select:focus{border-color:var(--gold);outline:none;box-shadow:0 0 0 3px var(--gold-tint)}.lp .tool .hint{display:block;color:var(--muted);font-size:.82rem;line-height:1.6;margin-top:3px}.lp .tool .out{background:var(--soft);border:1px solid var(--border);border-radius:var(--r-md);padding:16px 18px}.lp .tool .out dl{margin:0;display:grid;grid-template-columns:1fr auto;gap:6px 14px}.lp .tool .out dt{color:var(--text)}.lp .tool .out dd{margin:0;font-weight:700;direction:ltr;text-align:left;color:var(--green)}.lp .tool .out .tot{font-size:1.1rem;padding-top:8px;border-top:1px dashed var(--gold-line)}.lp .tool .res{margin-top:14px;padding:16px 18px;border-radius:var(--r-md);background:var(--gold-tint);border:1px solid var(--gold-line)}.lp .tool .res b{display:block;color:var(--green);margin-bottom:4px}.lp .tool .res p{margin:0 0 .6rem;color:var(--text)}.lp .tool .res .links{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.lp .tool .res .links a{display:inline-flex;align-items:center;min-height:44px;padding:6px 16px;border-radius:var(--r-md);background:var(--green);color:#f7fff6;text-decoration:none;font-weight:700;font-size:.92rem}.lp .tool .res .links a:hover{background:var(--green-2)}.lp .tool .err{color:#b91c1c;font-size:.9rem;min-height:1.4em}@media (min-width:640px){.lp .tool .grid{grid-template-columns:repeat(2,1fr)}}.lp .tool .res[hidden],.lp .tool[hidden]{display:none}.lp .hero a:not(.btn){color:#e6c76a}.lp .hero a:not(.btn):hover{color:#fff}.lp .hero .lead a{text-decoration-color:rgba(230,199,106,.6)}.lp .top-tool{margin-top:-28px;position:relative;z-index:3}.lp .top-tool .tool{margin:0 0 8px;box-shadow:0 12px 32px rgba(0,59,41,.18)}.lp .tool .full{grid-column:1/-1}.lp .tool .adv{margin:4px 0 12px;border:1px dashed var(--border);border-radius:var(--r-md);padding:0 14px;background:var(--soft)}.lp .tool .adv summary{cursor:pointer;min-height:48px;display:flex;align-items:center;font-weight:700;color:var(--green);list-style:none;gap:8px}.lp .tool .adv summary::-webkit-details-marker{display:none}.lp .tool .adv summary:after{content:"";margin-inline-start:auto;width:9px;height:9px;border:solid var(--gold);border-width:0 2px 2px 0;transform:rotate(45deg);transition:transform .2s}.lp .tool .adv[open] summary:after{transform:rotate(-135deg)}.lp .tool .adv .grid{margin:4px 0 14px}.lp .tool .btn-green{width:100%;min-height:52px;font-size:1.05rem}@media (min-width:640px){.lp .tool .btn-green{width:auto;min-width:220px}}.lp .tool .basis{margin:12px 0 0;font-size:.82rem;color:var(--muted);line-height:1.8}.lp .tool .out[hidden]{display:none}.lp .hero.has-tool{padding-block:18px 52px}.lp .hero.has-tool .cta-row,.lp .hero.has-tool .meta-line{display:none}.lp .hero.has-tool h1{font-size:clamp(1.55rem,1.1rem + 2vw,2.4rem);margin-bottom:8px}.lp .hero.has-tool .lead{margin-bottom:0;font-size:1rem}.lp .hero.has-tool .crumbs{margin-bottom:10px}.lp .top-tool{margin-top:-36px}.lp .top-tool+.trust{margin-top:18px}.lp .tool .formula{margin:14px 0 0;padding:14px 16px;border:1px solid var(--border);border-radius:var(--r-md);background:#fff}.lp .tool .formula h4{margin:0 0 6px;font-size:.95rem;color:var(--green)}.lp .tool .formula ol{margin:0;padding-inline-start:1.3rem;font-size:.92rem;line-height:1.9;color:var(--text)}.lp .tool .tool .fld{display:block}.lp .tool .ftex{display:block;direction:ltr;text-align:center;margin-top:8px;padding:6px 10px;background:linear-gradient(180deg,#fff,#fbfff9);border:1px solid var(--border);border-radius:10px;font-size:.95rem;line-height:1.4;overflow-x:auto;color:var(--green)}.lp .tool .formula{background:linear-gradient(180deg,#fff,#f6fff5);border:1px solid var(--gold-line);box-shadow:inset 0 0 0 4px rgba(212,175,55,.06)}.lp .tool .formula .ftex{border:0;background:transparent;font-size:1.15rem;padding:10px 4px;margin:0}.lp .tool .formula .katex-display{margin:.4em 0}.lp .tool .legend{list-style:none;margin:10px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:6px 12px;font-size:.84rem;color:var(--text);line-height:1.6}.lp .tool .legend i{font-family:KaTeX_Math,Times New Roman,serif;font-size:1.05em;color:var(--green);font-weight:700;margin-inline-end:6px;display:inline-block;min-width:1.1em;text-align:center}.lp .tool .fnote{margin:10px 0 0;font-size:.82rem;color:var(--muted)}.lp .tool .out .live{margin-top:12px;padding:10px 6px;background:#fff;border:1px solid var(--border);border-radius:10px;overflow-x:auto;font-size:.95rem}.lp .tool .out .live .katex-display{margin:.3em 0}@media (min-width:640px){.lp .tool .legend{grid-template-columns:repeat(3,1fr)}}@media (max-width:480px){.lp .tool .out .live{font-size:.78rem}.lp .tool .formula .ftex{font-size:1.05rem}}.lp .article{max-width:780px}.lp .article ol,.lp .article p,.lp .article ul{max-width:none}.lp .article h2{margin-top:2.4rem}.lp .toc-side a{display:block;padding:7px 12px;border-radius:10px;color:var(--text);text-decoration:none;font-size:.92rem;line-height:1.6;border-inline-start:3px solid transparent}.lp .toc-side a:hover{background:var(--soft);color:var(--green);border-inline-start-color:var(--gold)}.lp .toc-side h3{margin:0 0 8px;font-size:.95rem;color:var(--green)}