:root{--primary:#039daa;--dark:#0c6169;--light:#07cad5;--ink:#152326;--muted:#617176;--surface:#fff;--soft:#f3fbfc;--border:#d9ecee;--shadow:0 12px 30px rgba(12,97,105,.10);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:#fff;line-height:1.7}a{color:var(--dark);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}.container{width:min(1120px,calc(100% - 32px));margin:auto}.site-header{background:#fff;position:sticky;top:0;z-index:40;border-bottom:1px solid var(--border);box-shadow:0 3px 18px rgba(10,56,60,.05)}.header-inner{min-height:74px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--dark);white-space:nowrap}.brand img{width:44px;height:44px}.nav{margin-left:auto;display:flex;align-items:center;gap:22px;font-weight:700;font-size:14px}.nav a{color:#153b3f}.nav a.active,.nav a:hover{color:var(--primary);text-decoration:none}.menu-btn{display:none;margin-left:auto;border:0;background:var(--primary);color:#fff;border-radius:10px;padding:9px 12px;font-size:20px}.hero{padding:48px 0 32px;background:linear-gradient(180deg,#f7ffff,#fff)}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;background:#e9fbfc;border:1px solid #b8eef1;color:var(--dark);padding:7px 12px;border-radius:999px;font-size:13px;font-weight:800}.hero h1{font-size:clamp(38px,5vw,62px);line-height:1.05;margin:18px 0 12px;color:var(--dark);letter-spacing:-1.5px}.hero h2{font-size:clamp(22px,3vw,34px);margin:0 0 16px;color:var(--primary)}.hero p{font-size:18px;color:#425b5f;max-width:700px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 20px;border-radius:12px;background:var(--primary);color:#fff!important;font-weight:800;border:2px solid var(--primary);text-decoration:none!important;box-shadow:0 8px 18px rgba(3,157,170,.18)}.btn:hover{background:var(--dark);border-color:var(--dark)}.btn-outline{background:#fff;color:var(--dark)!important;border-color:#a7dfe3;box-shadow:none}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.phone-art{max-width:390px;margin:auto;filter:drop-shadow(0 18px 26px rgba(10,63,68,.12))}.trust{padding:18px 0 34px}.trust-card{display:grid;grid-template-columns:180px 1fr;align-items:center;gap:24px;padding:22px;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}.trust-card img{width:150px;margin:auto}.trust-card h3{margin:0;color:var(--dark);font-size:24px}.section{padding:56px 0}.section.alt{background:var(--soft)}.section-title{text-align:center;max-width:780px;margin:0 auto 30px}.section-title h2{font-size:34px;line-height:1.2;color:var(--dark);margin:0 0 10px}.section-title p{color:var(--muted);margin:0}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.card h3{color:var(--dark);margin:8px 0 8px;font-size:20px}.icon{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:#e4f9fa;color:var(--dark);font-size:22px;font-weight:900}.tutorial-grid,.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.blog-card{overflow:hidden;padding:0}.blog-card img{aspect-ratio:16/10;object-fit:cover;width:100%;background:#e8f8f9}.blog-card-body{padding:18px}.blog-card h3{margin:0 0 8px;line-height:1.35}.blog-card p{color:var(--muted);font-size:14px}.blog-card .read{font-weight:800;color:var(--primary)}.faq{max-width:900px;margin:auto}.faq-item{border:1px solid var(--border);border-radius:14px;margin:10px 0;background:#fff;overflow:hidden}.faq-q{width:100%;text-align:left;background:#fff;border:0;padding:17px 19px;font-weight:800;color:var(--dark);font-size:16px;display:flex;justify-content:space-between;gap:12px}.faq-a{display:none;padding:0 19px 18px;color:#4a6165}.faq-item.open .faq-a{display:block}.faq-item.open .faq-q span:last-child{transform:rotate(45deg)}.content-wrap{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:34px;align-items:start}.article{min-width:0}.article h2{color:var(--dark);font-size:30px;line-height:1.25;margin:42px 0 12px}.article h3{color:#0a7078;font-size:22px;line-height:1.3;margin:30px 0 8px}.article h4{color:var(--dark);font-size:18px}.article p{margin:0 0 16px}.article ul,.article ol{padding-left:22px}.article img.content-img{border-radius:18px;border:1px solid var(--border);margin:22px auto;max-height:540px}.toc{padding:20px;border:1px solid var(--border);background:#fbffff;border-radius:16px}.toc strong{color:var(--dark)}.toc ul{margin:10px 0 0}.sidebar{position:sticky;top:96px}.side-box{border:1px solid var(--border);border-radius:16px;padding:18px;background:#fff;box-shadow:var(--shadow);margin-bottom:18px}.side-box h3{margin:0 0 10px;color:var(--dark)}.app-table{width:100%;border-collapse:collapse;margin:22px 0}.app-table td,.app-table th{border:1px solid #111;padding:11px 12px;text-align:left}.proscons{display:grid;grid-template-columns:1fr 1fr;gap:18px}.proscons .card{box-shadow:none}.page-hero{padding:44px 0 26px;background:#f4fcfd}.page-hero h1{font-size:42px;line-height:1.1;color:var(--dark);margin:0 0 10px}.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:12px}.notice{border-left:5px solid var(--primary);background:#effbfc;padding:16px 18px;border-radius:10px;margin:20px 0}.old-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.footer{margin-top:50px;background:#073f44;color:#eaffff;padding:40px 0 18px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:28px}.footer a{color:#eaffff}.footer h3{color:#fff;margin-top:0}.footer-bottom{border-top:1px solid rgba(255,255,255,.2);margin-top:28px;padding-top:16px;text-align:center;font-size:14px}.social{display:flex;gap:10px}.social a{width:38px;height:38px;border:1px solid rgba(255,255,255,.3);border-radius:50%;display:grid;place-items:center}.backtop{position:fixed;right:18px;bottom:18px;width:44px;height:44px;border:0;border-radius:50%;background:var(--primary);color:#fff;font-size:22px;display:none;z-index:50}.backtop.show{display:block}.copyright-note{font-size:13px;color:#6c7f82}.contact-form label{font-weight:700}.contact-form input,.contact-form textarea{width:100%;padding:12px;border:1px solid #b8d9dc;border-radius:10px;margin:6px 0 14px;font:inherit}.contact-form textarea{min-height:140px}.lang-badge{font-size:12px;border:1px solid var(--border);padding:6px 9px;border-radius:999px;background:#fff}
@media(max-width:900px){.hero-grid,.content-wrap{grid-template-columns:1fr}.hero-grid{text-align:center}.hero p{margin-left:auto;margin-right:auto}.hero-actions{justify-content:center}.sidebar{position:static}.feature-grid,.tutorial-grid,.blog-grid,.old-grid{grid-template-columns:repeat(2,1fr)}.nav{display:none;position:absolute;top:74px;left:0;right:0;padding:16px 22px;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;align-items:flex-start;gap:12px}.nav.open{display:flex}.menu-btn{display:block}.trust-card{grid-template-columns:130px 1fr}}
@media(max-width:620px){.container{width:min(100% - 22px,1120px)}.hero{padding-top:30px}.hero h1{font-size:38px}.feature-grid,.tutorial-grid,.blog-grid,.old-grid,.proscons,.footer-grid{grid-template-columns:1fr}.trust-card{grid-template-columns:1fr;text-align:center}.page-hero h1{font-size:34px}.section{padding:42px 0}.article h2{font-size:26px}.brand span{font-size:17px}.lang-badge{display:none}}