@font-face{font-family:IRANSans;src:url('/assets/fonts/IRANSansWeb.woff') format('woff');font-display:swap;font-weight:400}
@font-face{font-family:IRANSans;src:url('/assets/fonts/IRANSansWeb_Bold.woff') format('woff');font-display:swap;font-weight:700}
:root{--bg:#f6f4ef;--paper:#fff;--ink:#162f35;--muted:#607277;--brand:#0f6671;--brand2:#27828d;--accent:#e5a11a;--line:#dfe6e4;--soft:#eaf3f2;--shadow:0 18px 60px rgba(22,47,53,.10);--r:26px;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,#faf9f5 0,var(--bg) 100%);color:var(--ink);font-family:IRANSans,Tahoma,Arial,sans-serif;line-height:1.9;-webkit-font-smoothing:antialiased}
a{color:inherit}.wrap{width:min(var(--max),calc(100% - 36px));margin-inline:auto}.skip{position:absolute;right:18px;top:-80px;z-index:99;background:#fff;padding:10px 16px;border-radius:12px}.skip:focus{top:12px}
.site-head{position:sticky;top:0;z-index:40;border-bottom:1px solid rgba(22,47,53,.07);background:rgba(250,249,245,.9);backdrop-filter:blur(18px)}.site-head .wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800}.brand img{width:38px;height:38px}.nav{display:flex;align-items:center;gap:5px}.nav a{padding:8px 13px;border-radius:999px;text-decoration:none;color:var(--muted)}.nav a:hover,.nav a[aria-current=page]{background:#fff;color:var(--brand)}
.hero{padding:50px 0 28px}.hero-box{overflow:hidden;position:relative;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:34px;align-items:center;border:1px solid var(--line);border-radius:34px;background:var(--paper);box-shadow:var(--shadow)}.hero-copy{padding:clamp(30px,5vw,64px)}.eyebrow,.tag{display:inline-flex;align-items:center;width:max-content;border-radius:999px;background:var(--soft);color:var(--brand);font-size:.78rem;font-weight:800;padding:5px 11px}.hero h1{font-size:clamp(2.25rem,4.9vw,4.65rem);line-height:1.22;letter-spacing:-.03em;margin:14px 0 17px}.hero p{font-size:1.03rem;color:var(--muted);max-width:720px;margin:0}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:45px;padding:8px 16px;border-radius:14px;text-decoration:none;border:1px solid var(--line);font-weight:700}.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}.hero-media{min-height:430px;height:100%;position:relative}.hero-media img{width:100%;height:100%;object-fit:cover;display:block}.photo-credit{position:absolute;left:12px;bottom:12px;background:rgba(13,27,30,.74);color:#fff;border-radius:9px;padding:4px 8px;font-size:.68rem;text-decoration:none}
.statbar{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:18px auto 0}.stat{padding:15px 16px;border:1px solid var(--line);border-radius:18px;background:#fff}.stat strong{display:block;font-size:1.15rem}.stat span{color:var(--muted);font-size:.8rem}
.tools{padding:24px 0 6px}.tools-box{display:flex;align-items:center;justify-content:space-between;gap:16px;border:1px solid var(--line);border-radius:22px;background:#fff;padding:14px}.search{flex:1;display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:14px;padding:0 13px;background:#fafbf9}.search input{width:100%;border:0;outline:0;background:transparent;padding:12px 0;font:inherit;color:var(--ink)}.filters{display:flex;gap:7px;flex-wrap:wrap}.filter{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:999px;padding:7px 11px;font:inherit;font-size:.78rem;cursor:pointer}.filter.is-active{background:var(--brand);border-color:var(--brand);color:#fff}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;padding:34px 0 18px}.section-head h2{margin:0;font-size:clamp(1.6rem,3vw,2.4rem)}.section-head p{margin:0;color:var(--muted);max-width:590px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;padding-bottom:70px}.card{overflow:hidden;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:24px;background:#fff;text-decoration:none;box-shadow:0 9px 34px rgba(22,47,53,.05);transition:.2s ease}.card:hover{transform:translateY(-5px);box-shadow:0 18px 48px rgba(22,47,53,.11);border-color:#c8d8d5}.card-media{height:205px;position:relative;overflow:hidden;background:#dde7e6}.card-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s ease}.card:hover .card-media img{transform:scale(1.025)}.card-body{display:flex;flex-direction:column;flex:1;padding:20px}.card h2{font-size:1.08rem;line-height:1.7;margin:10px 0 7px}.card p{margin:0;color:var(--muted);font-size:.88rem}.card-meta{display:flex;justify-content:space-between;gap:8px;margin-top:auto;padding-top:18px;color:#75868a;font-size:.75rem}.empty{display:none;grid-column:1/-1;text-align:center;border:1px dashed var(--line);border-radius:20px;padding:35px;color:var(--muted)}
.cluster{padding:8px 0 68px}.cluster-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.cluster a{display:block;padding:18px;border:1px solid var(--line);border-radius:18px;background:#fff;text-decoration:none}.cluster strong{display:block}.cluster span{font-size:.78rem;color:var(--muted)}
.article-shell{padding:45px 0 80px}.article-hero{overflow:hidden;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(330px,.92fr);border:1px solid var(--line);border-radius:32px;background:#fff;box-shadow:var(--shadow)}.article-hero-copy{padding:clamp(28px,5vw,58px)}.breadcrumbs{font-size:.78rem;color:var(--muted);margin-bottom:14px}.breadcrumbs a{color:var(--brand);text-decoration:none}.article-hero h1{font-size:clamp(2rem,4.2vw,3.9rem);line-height:1.32;letter-spacing:-.025em;margin:10px 0 15px}.lead{font-size:1rem;color:var(--muted);margin:0}.article-meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:20px}.article-meta span{padding:6px 10px;border-radius:999px;background:#f4f5f1;color:#65777b;font-size:.76rem}.article-hero-media{min-height:410px;position:relative}.article-hero-media img{width:100%;height:100%;object-fit:cover;display:block}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:24px;align-items:start;margin-top:24px}.article{border:1px solid var(--line);border-radius:28px;background:#fff;padding:clamp(25px,4vw,52px);box-shadow:0 12px 42px rgba(22,47,53,.05)}.article h2{scroll-margin-top:96px;margin:44px 0 12px;font-size:1.46rem;line-height:1.6;color:#174f58}.article h2:first-child{margin-top:0}.article h3{margin:25px 0 8px;font-size:1.08rem}.article p{margin:0 0 17px}.article ul,.article ol{margin:9px 0 24px;padding-right:23px}.article li{margin:7px 0}.quick-answer{margin:0 0 30px;padding:18px 20px;border-radius:18px;background:var(--soft);border-right:4px solid var(--brand)}.deep-section{margin:0}.expert-section{margin:34px 0;padding:6px 22px 18px;border-radius:20px;background:#f4f7f6;border:1px solid #dce6e3}.expert-section h2{margin-top:18px}.final-depth{margin:32px 0;padding:2px 18px 10px;border-right:3px solid var(--accent)}.case-study{margin:34px 0;padding:4px 22px 18px;border:1px solid #cddfdb;border-right:5px solid var(--brand2);border-radius:20px;background:linear-gradient(135deg,#f7fbfa,#fff)}.case-study h2{margin-top:20px}.action-section{margin:34px 0}.action-plan{counter-reset:action;list-style:none;padding:0;margin:15px 0 0;display:grid;gap:10px}.action-plan li{position:relative;padding:13px 50px 13px 14px;border:1px solid var(--line);border-radius:15px;background:#f8faf8}.action-plan li:before{counter-increment:action;content:counter(action);position:absolute;right:13px;top:12px;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--brand);color:#fff;font-size:.75rem;font-weight:800}.warning{margin:26px 0;padding:18px 20px;border:1px solid #efdcac;border-radius:18px;background:#fff9e9}.checklist{display:grid;gap:8px;margin:16px 0 28px}.check{padding:11px 13px;border-radius:14px;background:#f7f8f5;border:1px solid #e7ebe7}.faq details{border-top:1px solid var(--line);padding:13px 0}.faq summary{cursor:pointer;font-weight:700}.faq p{padding-top:9px;color:var(--muted)}.related{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.related a{padding:13px;border:1px solid var(--line);border-radius:14px;text-decoration:none;background:#fafbf9}.cta{margin-top:36px;padding:24px;border-radius:20px;background:linear-gradient(135deg,#113e47,var(--brand));color:#fff}.cta p{margin:4px 0 0;color:#d8ecec}.cta a{display:inline-flex;margin-top:12px;color:#fff;font-weight:800}
.toc{position:sticky;top:92px;max-height:calc(100vh - 112px);overflow:auto;border:1px solid var(--line);border-radius:20px;background:#fff;padding:18px}.toc strong{display:block;margin-bottom:8px}.toc a{display:block;text-decoration:none;color:var(--muted);font-size:.8rem;padding:7px 0;border-bottom:1px dashed #e6ebe9}.toc a:hover{color:var(--brand)}
.site-foot{border-top:1px solid var(--line);background:#fff;padding:30px 0}.site-foot .wrap{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;color:var(--muted);font-size:.82rem}.site-foot a{text-decoration:none;color:var(--brand)}
@media(max-width:920px){.hero-box,.article-hero{grid-template-columns:1fr}.hero-media,.article-hero-media{min-height:330px}.grid{grid-template-columns:repeat(2,1fr)}.cluster-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.toc{position:static;order:-1}.statbar{grid-template-columns:repeat(2,1fr)}.tools-box{align-items:stretch;flex-direction:column}}
@media(max-width:600px){.wrap{width:min(var(--max),calc(100% - 22px))}.site-head .wrap{min-height:64px}.brand span{display:none}.nav a{padding:7px 9px}.hero{padding-top:24px}.hero-box,.article-hero{border-radius:24px}.hero h1{font-size:2.2rem}.hero-media,.article-hero-media{min-height:245px}.grid,.cluster-grid,.related{grid-template-columns:1fr}.card-media{height:190px}.article-shell{padding-top:22px}.article{border-radius:22px;padding:22px}.statbar{grid-template-columns:1fr 1fr}.stat{padding:11px}.section-head{align-items:start;flex-direction:column}}