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20px),calc(100% - 15px);background-repeat:no-repeat;background-size:5px 5px;padding-right:40px}textarea{resize:vertical;min-height:110px}input::placeholder,textarea::placeholder{color:#6e737d}input:focus,select:focus,textarea:focus{border-color:var(--bt-vang-kim);outline:none;box-shadow:0 0 0 3px #c9a55a2e}.invalid{border-color:var(--bt-canh-bao)!important}.err{color:#f08a6c;font-size:14px}fieldset{border:0;min-width:0;margin:0;padding:0}.opts{flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.opt{position:relative}.opt input{opacity:0;cursor:pointer;margin:0;position:absolute;inset:0}.opt span{border:1px solid var(--bt-vien);min-height:44px;color:var(--bt-nga);border-radius:999px;align-items:center;padding:10px 14px;font-size:15px;transition:border-color .15s,background-color .15s;display:inline-flex}.opt input:checked+span{border-color:var(--bt-vang-kim);color:var(--bt-kim-sang);background:#c9a55a1f}.opt input:focus-visible+span{outline:2px solid var(--bt-kim-sang);outline-offset:2px}.check{cursor:pointer;align-items:flex-start;gap:12px;font-size:15px;line-height:1.5;display:flex}.check input{width:22px;height:22px;accent-color:var(--bt-vang-kim);flex:none;margin:1px 0 0}.note-ok{border-radius:var(--bt-bo-goc);background:#1e9e761a;border:1px solid #1e9e7680;padding:16px}.note-err{border-radius:var(--bt-bo-goc);color:var(--bt-nga);background:#d9542f1a;border:1px solid #d9542f80;padding:14px 16px}.site-foot{border-top:1px solid var(--bt-vien);margin-top:0;padding:48px 0 40px}.site-foot .logo{height:30px}.foot-slogan{font-family:var(--bt-font-thuong-hieu);color:var(--bt-vang-kim);margin-top:12px;font-size:22px;font-style:italic;font-weight:500}.foot-text{color:var(--bt-xam-phu);max-width:640px;margin-top:16px;font-size:14px}.foot-links{flex-wrap:wrap;gap:4px 18px;margin:20px 0 0;padding:0;font-size:14px;list-style:none;display:flex}.foot-links a{color:var(--bt-nga);padding:6px 0;text-decoration:none;display:inline-block}.foot-links a:hover{color:var(--bt-kim-sang)}.foot-copy{color:#6e737d;margin-top:20px;font-size:13px}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}