:root{--ink:#14231f;--muted:#64736e;--paper:#f5f8f3;--card:#fff;--line:#dce6df;--green:#075e4d;--lime:#d9f36a;--orange:#ff7549;--blue:#3964f5;--shadow:0 20px 50px #14302717}*{box-sizing:border-box}html{scroll-behavior:smooth}body{color:var(--ink);background:var(--paper);margin:0;font-family:DM Sans,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}.shell{width:min(1160px,100% - 40px);margin:0 auto}.topbar{z-index:5;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#f5f8f3e0;position:sticky;top:0}.nav{justify-content:space-between;gap:28px;min-height:76px}.brand,.nav{align-items:center;display:flex}.brand{gap:11px;font:700 1.1rem Space Grotesk,sans-serif}.brand-mark,.mark{width:37px;height:37px;color:var(--ink);background:var(--lime);border-radius:11px 11px 11px 3px;place-items:center;font-weight:700;display:grid}.nav-links{color:var(--muted);gap:28px;font-size:.92rem;display:flex}.back,.nav-links a:hover{color:var(--green)}.button,.nav-cta{cursor:pointer;font:inherit;border:0;border-radius:7px;justify-content:center;align-items:center;gap:8px;font-weight:700;transition:transform .2s;display:inline-flex}.nav-cta{color:var(--paper);background:var(--green);padding:11px 17px}.button{color:var(--ink);background:var(--lime);padding:15px 21px}.button.dark{color:#fff;background:var(--green)}.button:hover,.nav-cta:hover{transform:translateY(-2px)}.eyebrow{color:var(--green);letter-spacing:.12em;text-transform:uppercase;align-items:center;gap:9px;font-size:.78rem;font-weight:700;display:inline-flex}.eyebrow:before{content:"";background:var(--orange);width:24px;height:2px}h1,h2,h3{letter-spacing:-.04em;margin:0;font-family:Space Grotesk,sans-serif;line-height:1.05}section{padding:110px 0}.section-head{justify-content:space-between;align-items:end;gap:40px;margin-bottom:45px;display:flex}.section-head h2{max-width:560px;margin-top:17px;font-size:clamp(2.4rem,5vw,4.35rem)}.section-head p{max-width:360px;color:var(--muted)}.floating-chat{z-index:10;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:24px;right:24px}.chat-button{color:#fff;border-radius:50%;place-items:center;width:54px;height:54px;font:700 1.2rem Space Grotesk,sans-serif;display:grid;box-shadow:0 8px 22px #14231f33}.facebook-chat{background:#1877f2}.zalo-chat{background:#0068ff;font-size:.92rem}footer{border-top:1px solid var(--line);color:var(--muted);padding:27px 0;font-size:.85rem}.footer-inner{justify-content:space-between;gap:20px;display:flex}@media (width<=760px){.shell{width:min(100% - 28px,620px)}.nav{min-height:68px}.nav-links{display:none}.nav-cta{padding:9px 13px;font-size:.82rem}section{padding:75px 0}.section-head{margin-bottom:30px;display:block}.section-head p{margin-top:24px}.floating-chat{gap:8px;bottom:16px;right:16px}.chat-button{width:48px;height:48px}.footer-inner{display:block}.footer-inner span{margin-top:7px;display:block}}