.qig-shell{--blue-950:#062454;--blue-900:#08336f;--blue-800:#07499d;--blue-700:#0759c7;--blue-600:#0b6de1;--blue-100:#e9f3ff;--cyan:#19b7cb;--ink:#10213d;--muted:#66758f;--line:#dbe5f2;--surface:#fff;--page:#f5f9ff;--shadow:0 24px 60px #042f6b1f;--radius:22px;background:var(--page);color:var(--ink);flex-direction:column;min-height:100dvh;font-size:16px;line-height:1.6;display:flex}.qig-shell *{box-sizing:border-box}.qig-shell button,.qig-shell a{font:inherit}.qig-shell a{color:inherit;text-decoration:none}.qig-shell .shell{width:min(1180px,100% - 40px);margin:auto}.qig-shell header{z-index:30;backdrop-filter:blur(18px);background:#ffffffe6;border-bottom:1px solid #dbe5f2cc;position:sticky;top:0}.qig-shell nav{justify-content:space-between;align-items:center;gap:28px;height:64px;display:flex}.qig-shell section[id]{scroll-margin-top:76px}.qig-shell .brand{align-items:center;gap:14px;min-width:max-content;display:flex}.qig-shell .brand-logo{filter:drop-shadow(0 7px 12px 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#0b6de159}.qig-shell section{padding:30px 0}.qig-shell #san-pham{padding-top:30px}.qig-shell .section-head{justify-content:space-between;align-items:end;gap:40px;margin-bottom:36px;display:flex}.qig-shell .kicker{color:var(--blue-700);letter-spacing:1.2px;text-transform:uppercase;margin:0 0 9px;font-size:13px;font-weight:850}.qig-shell h2.section-title{letter-spacing:-1.5px;color:var(--blue-950);margin:0;font-size:clamp(30px,3.4vw,43px);line-height:1.2}.qig-shell .section-note{max-width:480px;color:var(--muted);margin:0}.qig-shell .welcome{background:var(--surface);border:1px solid var(--line);border-radius:20px;flex-wrap:wrap;align-items:center;gap:16px;margin-bottom:22px;padding:18px 22px;display:none;position:relative;overflow:hidden}.qig-shell .welcome:before{content:"";background:var(--blue-700);border-radius:20px 20px 0 0;height:3px;position:absolute;inset:0 0 auto}.qig-shell .welcome.is-visible{display:flex}.qig-shell 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