:root{--navy:#0f172a;--slate:#475569;--slate-light:#94a3b8;--sky:#0ea5e9;--cyan:#06b6d4;--sky-deep:#0284c7;--bg:#f6f9fc;--card:#ffffff;--line:#e6edf5;--gold:#c9832a;--gold-bg:#fdf6e9;--gold-line:#f0dcb0;--radius-lg:22px;--radius-md:16px;--radius-sm:11px;--shadow-sm:0 6px 16px rgba(15,23,42,.05);--shadow-md:0 18px 40px rgba(15,23,42,.08);font-family:'Iranyekan','Tahoma',sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--slate);font-family:'Iranyekan','Tahoma',sans-serif;line-height:1.9;-webkit-font-smoothing:antialiased}img{max-width:100%;display:block}a{color:inherit}#progress{position:fixed;top:0;right:0;left:0;height:3px;z-index:500;background:#fff0}#progress-bar{height:100%;width:0%;background:linear-gradient(90deg,var(--sky),var(--cyan));transition:width .1s linear}.page{max-width:1180px;margin:0 auto;padding:38px 24px 90px}.crumb{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--slate-light);font-weight:700;margin-bottom:22px}.crumb a{color:var(--sky-deep);text-decoration:none}.crumb svg{width:12px;height:12px;opacity:.6}.hero-tag{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(90deg,rgb(14 165 233 / .1),rgb(6 182 212 / .1));border:1px solid rgb(14 165 233 / .22);color:var(--sky-deep);font-size:12.5px;font-weight:800;padding:7px 16px 7px 12px;border-radius:100px;margin-bottom:18px}.hero-tag svg{width:14px;height:14px}h1.title{font-size:clamp(26px, 4vw, 40px);font-weight:800;color:var(--navy);line-height:1.55;letter-spacing:-.3px;margin:0 0 22px;max-width:920px}.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:30px}.meta-pill{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--line);padding:8px 14px;border-radius:100px;font-size:13px;font-weight:700;color:var(--slate);box-shadow:var(--shadow-sm)}.meta-pill svg{width:15px;height:15px;color:var(--sky-deep);flex-shrink:0}.meta-pill.author{color:var(--navy)}.meta-pill .avatar{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--sky),var(--cyan));display:flex;align-items:center;justify-content:center;color:#fff;font-size:11px;font-weight:800}.hero-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);margin-bottom:8px;aspect-ratio:16/7.4;background:#dfeaf3}.hero-media img{width:100%;height:100%;object-fit:cover}.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,#fff0 55%,rgb(15 23 42 / .55) 100%)}.hero-caption{position:absolute;bottom:0;right:0;left:0;padding:22px 26px;color:#fff;font-size:13.5px;font-weight:600;display:flex;align-items:center;gap:8px;z-index:2}.hero-caption svg{width:15px;height:15px;opacity:.85}.layout{display:grid;grid-template-columns:1fr 300px;gap:46px;margin-top:44px;align-items:start}.toc-card{position:sticky;top:26px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-md);padding:22px 20px;box-shadow:var(--shadow-sm)}.toc-head{display:flex;align-items:center;gap:9px;font-size:14.5px;font-weight:800;color:var(--navy);margin-bottom:16px;padding-bottom:14px;border-bottom:1px dashed var(--line)}.toc-head svg{width:17px;height:17px;color:var(--sky-deep)}.toc-list{list-style:none;margin:0;padding:0;position:relative}.toc-list::before{content:"";position:absolute;top:6px;bottom:6px;right:6px;width:1.5px;background:var(--line)}.toc-list li{position:relative;padding-right:22px;margin-bottom:2px}.toc-list li::before{content:"";position:absolute;right:1px;top:11px;width:7px;height:7px;border-radius:50%;background:#cbd5e1;border:2px solid var(--card);transition:background .2s ease,transform .2s ease}.toc-list a{display:block;text-decoration:none;color:var(--slate);font-size:13.3px;font-weight:600;padding:9px 4px;border-radius:8px;transition:color .2s ease,background .2s ease}.toc-list a:hover{color:var(--sky-deep);background:rgb(14 165 233 / .06)}.toc-list li.active a{color:var(--sky-deep);font-weight:800}.toc-list li.active::before{background:var(--sky);transform:scale(1.15)}.toc-cta{margin-top:18px;padding-top:18px;border-top:1px dashed var(--line);text-align:center}.toc-cta p{font-size:12.5px;color:var(--slate-light);margin:0 0 10px}.btn-cta{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(90deg,#0ea5e9,#0284c7);color:#fff!important;font-size:13px;font-weight:800;padding:11px 18px;border-radius:12px;text-decoration:none;box-shadow:0 8px 20px rgb(2 132 199 / .25)}.toc-mobile-toggle{display:none}.article{min-width:0}.lede{font-size:16.5px;color:var(--navy);font-weight:600;background:var(--card);border-right:4px solid var(--sky);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:18px 22px;margin:0 0 34px;box-shadow:var(--shadow-sm)}.article h2{font-size:22px;font-weight:800;color:var(--navy);margin:46px 0 18px;padding-right:16px;border-right:4px solid var(--sky);scroll-margin-top:26px}.article h3{font-size:17.5px;font-weight:800;color:var(--navy);margin:28px 0 12px;display:flex;align-items:center;gap:9px;scroll-margin-top:26px}.article h3::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--cyan);flex-shrink:0}.article p{margin:0 0 16px;font-size:15px;color:var(--slate)}.article strong{color:var(--navy);font-weight:800}.article ul{margin:0 0 18px;padding-right:22px}.article li{margin-bottom:9px;font-size:15px}.article li::marker{color:var(--sky-deep)}.golden-tip{position:relative;background:var(--gold-bg);border:1px solid var(--gold-line);border-radius:var(--radius-md);padding:24px 26px;margin:34px 0}.golden-tip::before{content:"";position:absolute;top:-1px;right:26px;left:26px;height:3px;background:linear-gradient(90deg,#f0c674,#c9832a);border-radius:0 0 4px 4px}.golden-tip-label{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:800;color:var(--gold);margin-bottom:10px}.golden-tip-label svg{width:17px;height:17px}.golden-tip p{color:#7a5511;font-weight:600;font-size:14.8px;margin-bottom:10px}.golden-tip p:last-child{margin-bottom:0}.scenario{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-md);padding:22px 24px;margin:20px 0;box-shadow:var(--shadow-sm);position:relative}.scenario-num{position:absolute;top:-14px;right:22px;width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,var(--sky),var(--cyan));color:#fff;font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 14px rgb(14 165 233 / .35)}.scenario h4{margin:6px 0 14px;font-size:15.5px;color:var(--navy);font-weight:800}.s-row{display:flex;gap:10px;margin-bottom:10px;align-items:flex-start}.s-row .tag{flex-shrink:0;font-size:11.5px;font-weight:800;padding:3px 10px;border-radius:100px;margin-top:1px}.tag.problem{background:#fee2e2;color:#b91c1c}.tag.cause{background:#fef3c7;color:#92400e}.tag.fix{background:#dcfce7;color:#166534}.s-row p{margin:0;font-size:14px}.experience{background:var(--navy);color:#e2e8f0;border-radius:var(--radius-md);padding:26px 26px;margin:34px 0;position:relative;overflow:hidden}.experience::before{content:"";position:absolute;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgb(14 165 233 / .35),transparent 70%);top:-90px;left:-90px}.experience-head{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:800;color:#7dd3fc;margin-bottom:12px;position:relative;z-index:1}.experience p{color:#cbd5e1;font-size:14.5px;margin-bottom:12px;position:relative;z-index:1}.experience blockquote{margin:14px 0;padding:14px 16px;background:rgb(255 255 255 / .06);border-right:3px solid var(--sky);border-radius:0 10px 10px 0;font-style:normal;color:#f1f5f9;font-size:14px;position:relative;z-index:1}.summary-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-md);padding:24px 26px;margin:34px 0;box-shadow:var(--shadow-sm)}.summary-box h4{margin:0 0 16px;font-size:16px;color:var(--navy);font-weight:800;display:flex;gap:8px;align-items:center}.summary-box h4 svg{width:19px;height:19px;color:var(--sky-deep)}.check-list{list-style:none;margin:0;padding:0}.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;margin-bottom:12px}.check-list li:last-child{margin-bottom:0}.check-icon{flex-shrink:0;width:20px;height:20px;border-radius:50%;background:linear-gradient(135deg,var(--sky),var(--cyan));display:flex;align-items:center;justify-content:center;margin-top:1px}.check-icon svg{width:11px;height:11px;stroke:#fff}.promo{background:linear-gradient(135deg,#eef8ff,#f0fdfd);border:1px solid rgb(14 165 233 / .25);border-radius:var(--radius-lg);padding:30px 28px;margin:44px 0 10px;text-align:center}.promo h4{font-size:19px;color:var(--navy);font-weight:800;margin:0 0 10px}.promo p{font-size:14.5px;color:var(--slate);max-width:520px;margin:0 auto 20px}.promo-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;max-width:480px;margin:0 auto 22px;text-align:right}.promo-grid div{display:flex;gap:8px;align-items:center;font-size:13px;font-weight:700;color:var(--navy);background:rgb(255 255 255 / .7);padding:9px 12px;border-radius:10px}.promo-grid svg{width:15px;height:15px;color:#16a34a;flex-shrink:0}.section-block{margin-top:64px}.section-head{display:flex;align-items:center;gap:12px;margin-bottom:24px}.section-head .icon-badge{width:42px;height:42px;border-radius:13px;background:linear-gradient(135deg,var(--sky),var(--cyan));display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgb(14 165 233 / .28);flex-shrink:0}.section-head .icon-badge svg{width:20px;height:20px;color:#fff}.section-head h2{margin:0;font-size:21px;font-weight:800;color:var(--navy)}.section-head span{display:block;font-size:12.5px;color:var(--slate-light);font-weight:600;margin-top:2px}.faq-list{display:flex;flex-direction:column;gap:10px}.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden}.faq-item[open]{border-color:rgb(14 165 233 / .35);box-shadow:var(--shadow-sm)}.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px;font-size:15px;font-weight:700;color:var(--navy)}.faq-item summary::-webkit-details-marker{display:none}.faq-q{display:flex;align-items:center;gap:12px}.faq-q .qmark{flex-shrink:0;width:26px;height:26px;border-radius:8px;background:rgb(14 165 233 / .1);color:var(--sky-deep);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}.faq-toggle{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;transition:transform .25s ease}.faq-item[open] .faq-toggle{transform:rotate(45deg);background:linear-gradient(135deg,var(--sky),var(--cyan))}.faq-item[open] .faq-toggle svg{stroke:#fff}.faq-toggle svg{width:13px;height:13px;stroke:var(--sky-deep)}.faq-body{padding:0 20px 20px 60px;font-size:14.3px;color:var(--slate)}.comments-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 28px;box-shadow:var(--shadow-sm)}.comment-empty{display:flex;flex-direction:column;align-items:center;text-align:center;padding:26px 10px 34px;color:var(--slate-light);border-bottom:1px dashed var(--line);margin-bottom:26px}.comment-empty svg{width:34px;height:34px;margin-bottom:12px;opacity:.5}.comment-empty strong{color:var(--navy);font-size:15px;display:block;margin-bottom:4px}.comment-empty span{font-size:13px}.comment-form label{display:block;font-size:13.5px;font-weight:800;color:var(--navy);margin-bottom:9px}.comment-form textarea{width:100%;min-height:120px;resize:vertical;border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px;font-family:inherit;font-size:14px;color:var(--navy);background:var(--bg);transition:border-color .2s ease,box-shadow .2s ease}.comment-form textarea:focus{outline:none;border-color:var(--sky);background:#fff;box-shadow:0 0 0 4px rgb(14 165 233 / .12)}.comment-form-foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px;flex-wrap:wrap;gap:12px}.comment-form-foot small{color:var(--slate-light);font-size:12px}.btn-submit{background:linear-gradient(90deg,#0ea5e9,#0284c7);color:#fff;border:none;font-family:inherit;font-size:14px;font-weight:800;padding:12px 26px;border-radius:12px;cursor:pointer;box-shadow:0 8px 20px rgb(2 132 199 / .25);display:inline-flex;align-items:center;gap:8px;transition:transform .2s ease,box-shadow .2s ease}.btn-submit:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgb(2 132 199 / .38)}.btn-submit svg{width:15px;height:15px}@media (max-width:1024px){.layout{grid-template-columns:1fr}.toc-card{position:static}.toc-mobile-toggle{display:flex;align-items:center;justify-content:space-between;cursor:pointer;padding-bottom:0;border-bottom:none;margin-bottom:0}.toc-card.collapsed .toc-list,.toc-card.collapsed .toc-cta{display:none}.toc-mobile-toggle svg.chev{transition:transform .25s ease}.toc-card.collapsed .toc-mobile-toggle svg.chev{transform:rotate(180deg)}.toc-head{margin-bottom:0;border-bottom:none;padding-bottom:0}.toc-card:not(.collapsed) .toc-head{margin-bottom:16px;border-bottom:1px dashed var(--line);padding-bottom:14px}}@media (max-width:640px){.page{padding:22px 16px 60px}h1.title{font-size:23px}.hero-media{aspect-ratio:4/3.4;border-radius:16px}.promo-grid{grid-template-columns:1fr}.comments-card{padding:22px 18px}.faq-body{padding-left:20px;padding-right:20px}}