:root {
  --cam: #f08a24;
  --cam-dam: #d9700f;
  --cam-nhat: #fff4e8;
  --xanh: #004cc4;
  --xanh-dam: #003a96;
  --xanh-nhat: #e8effc;
  --dem: #062a6b;
  --la: #00a060;
  --la-nhat: #e6f6ee;
  --nen: #f6f7f9;
  --trang: #ffffff;
  --chu: #1a2233;
  --chu-nhat: #5e6879;
  --vien: #e5e8ee;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16.5px; line-height: 1.7;
  color: var(--chu); background: var(--trang);
  padding-bottom: 74px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--xanh); }
.khung { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.hep { max-width: 800px; }
p { margin: 0 0 14px; }
h1, h2, h3 { line-height: 1.25; color: var(--dem); }
h2 { font-size: 30px; margin: 0 0 12px; font-weight: 800; }
h3 { font-size: 19px; margin: 0 0 6px; }
.cam { color: var(--cam); }

/* Nut */
.nut {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; min-height: 48px; border-radius: 10px;
  font-weight: 700; font-size: 15.5px; text-decoration: none; white-space: nowrap; border: 0; cursor: pointer;
}
.nut svg { width: 20px; height: 20px; flex: none; }
.nut-cam { background: var(--cam); color: #fff; }
.nut-cam:hover { background: var(--cam-dam); }
.nut-xanh { background: var(--xanh); color: #fff; }
.nut-trang { background: #fff; color: var(--dem); }
.nut-vien { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.6); }
.nut-vien-toi { background: transparent; color: var(--dem); border: 1.5px solid var(--vien); }
.nut-hang { display: flex; flex-wrap: wrap; gap: 10px; }

/* Dai chu chay */
.dai-chay { background: linear-gradient(90deg, var(--xanh-dam), var(--xanh) 60%, var(--la)); color: #fff; font-size: 13.5px; font-weight: 600; overflow: hidden; white-space: nowrap; }
.dai-chay .chay { display: inline-flex; gap: 48px; padding: 7px 0; animation: chay 38s linear infinite; }
.dai-chay span::before { content: "✦"; margin-right: 10px; opacity: .8; }
@keyframes chay { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .dai-chay .chay { animation: none; } }

/* Dau trang */
.thanh-dau { position: sticky; top: 0; z-index: 40; background: #fff; box-shadow: 0 2px 14px rgba(13,27,51,.07); }
/* Vach mau thuong hieu duoi thanh dau trang: cam mat troi - xanh duong tam pin - xanh la */
.thanh-dau::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: linear-gradient(90deg, var(--cam), #f5a623 30%, var(--xanh) 65%, var(--la)); }
.logo-dau { display: inline-flex; align-items: center; transition: transform .2s; }
.logo-dau:hover { transform: scale(1.03); }
.hang-1 { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0 14px; padding-top: 8px; padding-bottom: 8px; }
.hang-1 .menu { flex-basis: calc(100% + 32px); margin: 8px -16px -8px; }
.menu .khung { padding: 0; }
.logo-dau img { height: 62px; width: auto; }
.lien-he-dau { display: none; gap: 22px; align-items: center; }
.lien-he-dau .o { display: flex; gap: 10px; align-items: center; text-decoration: none; color: var(--chu); }
.lien-he-dau .o i { width: 40px; height: 40px; border-radius: 50%; background: var(--xanh-nhat); color: var(--xanh); display: inline-flex; align-items: center; justify-content: center; }
.lien-he-dau .o i svg { width: 20px; height: 20px; }
.lien-he-dau small { display: block; font-size: 12.5px; color: var(--chu-nhat); line-height: 1.3; }
.lien-he-dau b { display: block; font-size: 16px; line-height: 1.3; color: var(--dem); }
.menu-mo { display: none; }
.nut-menu { display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px; border-radius: 10px; border: 1px solid var(--vien); cursor: pointer; color: var(--dem); }
.nut-menu svg { width: 24px; height: 24px; }
.menu { display: none; border-top: 1px solid var(--vien); padding: 6px 16px 14px; background: #fff; }
.menu a { display: block; padding: 11px 4px; text-decoration: none; color: var(--chu); font-weight: 600; border-bottom: 1px solid var(--nen); }
.menu a[aria-current="page"] { color: var(--xanh); }
.menu-mo:checked ~ .menu { display: block; }
@media (min-width: 1100px) {
  .logo-dau img { height: 80px; }
  .lien-he-dau { display: flex; }
  .nut-menu { display: none; }
  .menu { display: block !important; padding: 0; }
  .menu .khung { display: flex; gap: 4px; padding: 0 6px; }
  .menu a { border: 0; padding: 12px 14px; font-size: 15px; white-space: nowrap; position: relative; }
  .menu a[aria-current="page"]::after, .menu a:hover::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 6px; height: 2px; background: var(--xanh); }
}

/* Duong dan */
.duong-dan { font-size: 14px; color: rgba(255,255,255,.75); padding: 18px 0 0; }
.duong-dan ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.duong-dan li + li::before { content: "›"; margin-right: 6px; }
.duong-dan a { color: rgba(255,255,255,.85); }
.bai-dd .duong-dan, .bai-dd .duong-dan a { color: var(--chu-nhat); }

/* Anh lon trang chu */
.anh-lon { position: relative; color: #fff; background: var(--dem) center / cover no-repeat; }
.anh-lon::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3,24,64,.92) 0%, rgba(3,24,64,.68) 50%, rgba(3,24,64,.2) 100%); }
.anh-lon .khung { position: relative; padding-top: 70px; padding-bottom: 120px; }
.anh-lon h1 { color: #fff; font-size: 32px; margin: 0 0 16px; font-weight: 800; max-width: 780px; }
.anh-lon h1 span { display: block; color: #ffb45c; font-size: .72em; margin-top: 8px; }
.anh-lon .ten-cty { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: #fff; border-left: 3px solid var(--la); padding-left: 10px; margin: 0 0 12px; opacity: .9; }
.anh-lon .mo { font-size: 17px; margin: 0 0 12px; max-width: 640px; opacity: .92; }
.anh-lon .phu { font-size: 14px; max-width: 640px; opacity: .75; margin-bottom: 24px; }
.nhan { display: inline-flex; gap: 8px; align-items: center; font-size: 13px; font-weight: 700; color: #ffd2ae; border: 1px solid rgba(255,210,174,.4); padding: 4px 12px; border-radius: 999px; margin-bottom: 16px; }
/* Logo nam goc tren ben trai cua anh lon */
.logo-anh-lon { position: absolute; top: 16px; left: 16px; }
.logo-anh-lon img { width: 170px; height: auto; filter: drop-shadow(0 2px 10px rgba(0,0,0,.6)); }
.anh-lon .khung.co-logo { padding-top: 112px; }
@media (min-width: 900px) {
  .logo-anh-lon { top: 22px; }
  .logo-anh-lon img { width: 240px; }
  .anh-lon .khung.co-logo { padding-top: 160px; }
}
@media (min-width: 900px) { .anh-lon .khung { padding-top: 110px; padding-bottom: 150px; } .anh-lon h1 { font-size: 48px; } }

/* So lieu de len anh */
.so-noi { position: relative; margin-top: -80px; z-index: 2; }
.luoi-so { display: grid; grid-template-columns: 1fr 1fr; background: #fff; border-radius: 18px; box-shadow: 0 18px 50px rgba(13,27,51,.14); overflow: hidden; }
.o-so { padding: 20px 16px; border-right: 1px solid var(--vien); border-bottom: 1px solid var(--vien); }
.o-so:nth-child(2n) { border-right: 0; }
.o-so b { display: block; font-size: 25px; line-height: 1.1; font-weight: 800; color: var(--dem); white-space: nowrap; }
.o-so b sup { color: var(--la); font-size: 14px; }
.o-so span { display: block; font-size: 14px; color: var(--chu-nhat); margin-top: 6px; line-height: 1.4; }
@media (min-width: 900px) {
  .luoi-so { grid-template-columns: repeat(4, 1fr); }
  .o-so { border-bottom: 0; padding: 26px 24px; border-right: 1px solid var(--vien) !important; }
  .o-so:last-child { border-right: 0 !important; }
  .o-so b { font-size: 38px; }
  .o-so b sup { font-size: 20px; }
}

/* Huy hieu phap ly */
.huy-hieu { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 22px; }
@media (min-width: 560px) { .huy-hieu { grid-template-columns: 1fr 1fr; } }
.hh { display: flex; gap: 10px; align-items: center; padding: 12px; border: 1px solid var(--vien); border-radius: 12px; background: #fff; }
.hh i { flex: none; width: 40px; height: 40px; border-radius: 10px; background: var(--la-nhat); color: var(--la); display: inline-flex; align-items: center; justify-content: center; }
.hh i svg { width: 22px; height: 22px; }
.hh b { display: block; font-size: 14px; line-height: 1.3; color: var(--dem); }
.hh small { display: block; font-size: 12.5px; color: var(--chu-nhat); line-height: 1.3; }
@media (min-width: 900px) { .huy-hieu { grid-template-columns: repeat(4, 1fr); } }

/* Dau trang con */
.dau-trang { position: relative; color: #fff; background: var(--dem) center / cover no-repeat; }
.dau-trang::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3,24,64,.94), rgba(3,24,64,.7)); }
.dau-trang .khung { position: relative; padding-bottom: 40px; }
.dau-trang h1 { color: #fff; font-size: 30px; margin: 16px 0 12px; font-weight: 800; max-width: 820px; }
.dau-trang .mo-ta { font-size: 17px; opacity: .9; max-width: 760px; margin-bottom: 22px; }
@media (min-width: 900px) { .dau-trang h1 { font-size: 42px; } .dau-trang .khung { padding-bottom: 56px; } }

/* Muc */
.muc { padding: 60px 0; }
.nen-xam { background: var(--nen); }
.nen-toi { background: var(--dem); color: #e6ebf5; }
.nen-toi h2, .nen-toi h3 { color: #fff; }
.tieu-de { max-width: 760px; margin: 0 0 30px; }
.tieu-de.giua { text-align: center; margin-left: auto; margin-right: auto; }
.tieu-de small { display: inline-flex; align-items: center; gap: 8px; color: var(--la); font-weight: 700; font-size: 13.5px; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 8px; }
.tieu-de small::before { content: ""; width: 22px; height: 2px; background: var(--la); }
.tieu-de p { color: var(--chu-nhat); margin: 0; }
.nen-toi .tieu-de p { color: #b8c3d8; }
@media (min-width: 900px) { h2 { font-size: 36px; } }

/* Luoi, the */
.luoi { display: grid; gap: 16px; }
@media (min-width: 760px) { .luoi-2 { grid-template-columns: 1fr 1fr; } .luoi-3 { grid-template-columns: repeat(3, 1fr); } .luoi-4 { grid-template-columns: repeat(4, 1fr); } }
.the { background: var(--trang); border: 1px solid var(--vien); border-radius: 16px; overflow: hidden; display: flex; flex-direction: column; }
.the img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.the-noi { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
.the-noi p { color: var(--chu-nhat); font-size: 15.5px; }
.the-noi .xem { margin-top: auto; font-weight: 700; text-decoration: none; color: var(--xanh); }
a.the { text-decoration: none; color: inherit; transition: box-shadow .2s, transform .2s; }
a.the:hover { box-shadow: 0 16px 36px rgba(13,27,51,.12); transform: translateY(-3px); }

/* Giai phap danh so */
.gp { position: relative; border-radius: 18px; overflow: hidden; min-height: 360px; display: flex; align-items: flex-end; color: #fff; text-decoration: none; background: var(--dem) center / cover no-repeat; }
.gp::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(3,24,64,.05) 20%, rgba(3,24,64,.9) 100%); transition: background .3s; }
.gp:hover::before { background: linear-gradient(180deg, rgba(0,160,96,.3) 0%, rgba(3,24,64,.92) 100%); }
.gp .so { position: absolute; top: 16px; left: 20px; font-size: 44px; font-weight: 800; color: rgba(255,255,255,.85); line-height: 1; }
.gp .noi { position: relative; padding: 22px; }
.gp h3 { color: #fff; font-size: 22px; }
.gp p { margin: 0 0 10px; opacity: .88; font-size: 15px; }
.gp .xem { font-weight: 700; color: #7ee2a8; }

.ck { display: flex; gap: 14px; align-items: flex-start; padding: 20px; border-radius: 16px; background: var(--trang); border: 1px solid var(--vien); }
.ck i { flex: none; width: 46px; height: 46px; border-radius: 12px; background: var(--la-nhat); color: var(--la); display: inline-flex; align-items: center; justify-content: center; }
.ck i svg { width: 24px; height: 24px; }
.ck h3 { font-size: 17.5px; }
.ck p { margin: 0; color: var(--chu-nhat); font-size: 15.5px; }

/* Nang luc phan phoi */
.nang-luc { display: grid; gap: 28px; align-items: center; }
@media (min-width: 900px) { .nang-luc { grid-template-columns: 1fr 1.3fr; } }
.hang-tb { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.hang-tb figure { margin: 0; background: #fff; border: 1px solid var(--vien); border-radius: 14px; padding: 8px; }
.hang-tb img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; border-radius: 10px; }
.hang-tb figcaption { font-size: 13.5px; font-weight: 700; color: var(--dem); margin-top: 6px; text-align: center; }
.hang-tb figcaption small { display: block; font-weight: 400; color: var(--chu-nhat); font-size: 12px; }
.ds-hang { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 18px; }
.ds-hang span { padding: 6px 12px; border-radius: 8px; background: #fff; border: 1px solid var(--vien); font-weight: 700; font-size: 14px; color: var(--dem); }

/* San pham */
.luoi-sp { grid-template-columns: 1fr 1fr; }
@media (min-width: 760px) { .luoi-sp { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1000px) { .luoi-sp { grid-template-columns: repeat(4, 1fr); } }
.the-sp img { aspect-ratio: 1 / 1; object-fit: contain; background: #fff; padding: 10px; }
.the-sp .the-noi { padding: 14px 14px 16px; border-top: 1px solid var(--vien); }
.the-sp h3 { font-size: 15.5px; line-height: 1.35; margin-bottom: 10px; }
.hang-sp { display: inline-block; font-size: 12px; font-weight: 700; color: var(--la); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 4px; }
.muc-nhanh { background: #fff; border-bottom: 1px solid var(--vien); }
.muc-nhanh .khung { display: flex; gap: 8px; padding-top: 10px; padding-bottom: 10px; overflow-x: auto; }
.muc-nhanh a { flex: none; padding: 8px 16px; border-radius: 999px; border: 1px solid var(--vien); text-decoration: none; color: var(--dem); font-weight: 700; font-size: 14.5px; }
.muc-nhanh a:hover { border-color: var(--xanh); color: var(--xanh); }
.muc { scroll-margin-top: 120px; }
.chi-tiet-sp { display: grid; gap: 26px; align-items: start; }
@media (min-width: 900px) { .chi-tiet-sp { grid-template-columns: 1fr 1.1fr; gap: 40px; } }
.anh-sp { margin: 0; border: 1px solid var(--vien); border-radius: 18px; padding: 20px; background: #fff; }
.anh-sp img { width: 100%; aspect-ratio: 1 / 1; object-fit: contain; }
.chi-tiet-sp h1 { font-size: 28px; margin: 4px 0 12px; }
@media (min-width: 900px) { .chi-tiet-sp h1 { font-size: 34px; } }
.mo-ta-sp { color: var(--chu-nhat); font-size: 16.5px; }
.cam-ket-sp { list-style: none; padding: 0; margin: 0 0 16px; }
.cam-ket-sp li { padding: 6px 0 6px 28px; position: relative; }
.cam-ket-sp li::before { content: "✓"; position: absolute; left: 0; top: 5px; width: 20px; height: 20px; border-radius: 50%; background: var(--la-nhat); color: var(--la); font-weight: 800; font-size: 12px; display: flex; align-items: center; justify-content: center; }
.gia-sp { background: var(--cam-nhat); border-radius: 12px; padding: 12px 16px; margin-bottom: 16px; }
.gia-sp b { color: var(--cam-dam); font-size: 18px; }

/* Cong trinh truot */
.truot { position: relative; }
.truot-ds { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; border-radius: 20px; }
.truot-ds::-webkit-scrollbar { display: none; }
.slide { flex: 0 0 100%; scroll-snap-align: start; display: grid; background: #fff; border: 1px solid var(--vien); border-radius: 20px; overflow: hidden; }
.slide img { width: 100%; height: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.slide .noi { padding: 22px; }
.slide h3 { font-size: 22px; }
.slide .noi-chon { color: var(--chu-nhat); font-size: 14.5px; margin-bottom: 12px; }
@media (min-width: 900px) { .slide { grid-template-columns: 1.35fr 1fr; } .slide img { aspect-ratio: auto; min-height: 420px; } .slide .noi { padding: 32px; } }
.bang-so { width: 100%; border-collapse: collapse; min-width: 0; font-size: 15px; margin: 6px 0 14px; }
.bang-so td { padding: 10px 0; border-bottom: 1px dashed var(--vien); }
.bang-so td:first-child { color: var(--chu-nhat); text-transform: uppercase; font-size: 12.5px; letter-spacing: .5px; }
.bang-so td:last-child { text-align: right; font-weight: 700; color: var(--dem); }
.bang-so tr:first-child td:last-child { color: var(--xanh); font-size: 20px; font-weight: 800; }
.truot-nut { display: flex; justify-content: center; gap: 10px; margin-top: 16px; align-items: center; }
.truot-nut button { width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--vien); background: #fff; color: var(--dem); font-size: 20px; cursor: pointer; }
.truot-nut button:hover { border-color: var(--xanh); color: var(--xanh); }
.truot-nut .dem { font-size: 14px; color: var(--chu-nhat); min-width: 60px; text-align: center; }

/* Bang gia */
.bang-cuon { overflow-x: auto; border: 1px solid var(--vien); border-radius: 14px; background: #fff; }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 620px; }
th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--vien); vertical-align: top; }
th { background: var(--dem); color: #fff; font-weight: 700; }
tr:last-child td { border-bottom: 0; }
td.gia { font-weight: 800; color: var(--cam-dam); white-space: nowrap; }
.ghi-chu { font-size: 14px; color: var(--chu-nhat); margin-top: 10px; }

/* Bao hanh */
.luoi-bh { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.bh { background: #fff; border: 1px solid var(--vien); border-radius: 14px; padding: 18px 14px; }
.bh b { display: block; font-size: 24px; line-height: 1.2; font-weight: 800; color: var(--xanh); }
.bh span { display: block; font-size: 14.5px; color: var(--chu-nhat); margin-top: 4px; }
.nen-toi .bh { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.14); }
.nen-toi .bh b { color: #7ee2a8; }
.nen-toi .bh span { color: #c5cee0; }
@media (min-width: 760px) { .luoi-bh { grid-template-columns: repeat(4, 1fr); } }

/* Quy trinh */
.buoc-hang { display: grid; gap: 12px; counter-reset: buoc; }
.buoc { position: relative; padding: 22px 20px 20px; background: var(--trang); border: 1px solid var(--vien); border-radius: 16px; }
.buoc::before { counter-increment: buoc; content: "0" counter(buoc); display: block; font-size: 32px; font-weight: 800; color: var(--la); line-height: 1; margin-bottom: 10px; }
.buoc h3 { font-size: 17.5px; }
.buoc p { margin: 0; color: var(--chu-nhat); font-size: 15.5px; }
@media (min-width: 760px) { .buoc-hang { grid-template-columns: repeat(4, 1fr); } }

/* O cong suat thay anh khi chua co anh dung cong trinh */
.o-cs { aspect-ratio: 16 / 10; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #fff;
  background: radial-gradient(circle at 80% 15%, rgba(0,160,96,.5), transparent 55%), linear-gradient(135deg, var(--dem), var(--xanh-dam)); }
.o-cs b { font-size: 48px; line-height: 1; font-weight: 800; }
.o-cs span { font-size: 16px; color: #7ee2a8; font-weight: 700; margin-top: 6px; }
.slide .o-cs { aspect-ratio: auto; min-height: 240px; height: 100%; }
.slide .o-cs b { font-size: 64px; }

/* Cong trinh the */
.ct-so { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 10px; }
.ct-so span { font-size: 12.5px; font-weight: 700; background: var(--nen); color: var(--dem); padding: 3px 10px; border-radius: 6px; }
.ct-so span.la { background: var(--la-nhat); color: var(--la); }
.thu-vien { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.thu-vien figure { margin: 0; }
.thu-vien img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 12px; }
.thu-vien figcaption { font-size: 13px; color: var(--chu-nhat); margin-top: 6px; }
@media (min-width: 760px) { .thu-vien { grid-template-columns: repeat(3, 1fr); } }

/* Khu vuc */
.khu-vuc { display: flex; flex-wrap: wrap; gap: 8px; }
.khu-vuc span { background: #fff; border: 1px solid var(--vien); padding: 6px 14px; border-radius: 8px; font-size: 14.5px; }

/* Van phong */
.van-phong { display: grid; gap: 18px; }
@media (min-width: 900px) { .van-phong { grid-template-columns: 1fr 1.2fr; } }
.the-lh { background: #fff; border: 1px solid var(--vien); border-radius: 18px; padding: 24px 22px; }
.the-lh .sdt { font-size: 30px; font-weight: 800; color: var(--xanh); margin: 6px 0 14px; }
.the-lh .sdt a { color: inherit; text-decoration: none; }
.ban-do { width: 100%; height: 100%; min-height: 360px; border: 0; border-radius: 18px; }

/* Hoi dap */
.hoi-dap { max-width: 860px; margin: 0 auto; display: grid; gap: 10px; }
.hoi-dap details { background: var(--trang); border: 1px solid var(--vien); border-radius: 12px; padding: 0 18px; }
.hoi-dap details[open] { border-color: #9fd9bd; }
.hoi-dap summary { cursor: pointer; list-style: none; padding: 16px 30px 16px 0; font-weight: 700; color: var(--dem); position: relative; }
.hoi-dap summary::-webkit-details-marker { display: none; }
.hoi-dap summary::after { content: "+"; position: absolute; right: 0; top: 12px; font-size: 24px; color: var(--la); }
.hoi-dap details[open] summary::after { content: "−"; }
.hoi-dap details p { margin: 0 0 16px; color: var(--chu-nhat); }

/* Bai viet */
.bai { padding: 30px 0 60px; }
.bai h2 { font-size: 25px; margin-top: 34px; }
.bai h3 { margin-top: 22px; }
.bai ul, .bai ol { padding-left: 22px; }
.bai li { margin-bottom: 6px; }
.bai figure { margin: 22px 0; }
.bai figure img { border-radius: 14px; width: 100%; }
.bai figcaption { font-size: 14px; color: var(--chu-nhat); margin-top: 8px; }
.tac-gia { font-size: 14px; color: var(--chu-nhat); }
.hop { margin: 22px 0; padding: 16px 20px; border-radius: 12px; background: var(--xanh-nhat); border-left: 4px solid var(--xanh); }
.hop p:last-child { margin: 0; }
.muc-luc { background: var(--nen); border-radius: 12px; padding: 14px 20px; margin: 18px 0; }
.muc-luc b { display: block; margin-bottom: 4px; color: var(--dem); }
.muc-luc ol { margin: 0; }

/* Keu goi */
.keu-goi { background: linear-gradient(120deg, var(--xanh-dam), var(--xanh) 55%, var(--la)); color: #fff; }
.keu-goi .khung { display: grid; gap: 18px; align-items: center; }
.keu-goi h2 { color: #fff; margin: 0 0 6px; }
.keu-goi p { color: rgba(255,255,255,.92); margin: 0; }
@media (min-width: 900px) { .keu-goi .khung { grid-template-columns: 1.5fr auto; } }

/* Chan trang */
.chan { background: var(--dem); color: #b8c3d8; font-size: 15px; padding: 50px 0 24px; }
.chan a { color: #fff; text-decoration: none; }
.chan a:hover { color: #7ee2a8; }
.chan h3 { color: #fff; font-size: 16px; margin: 0 0 12px; }
.chan ul { list-style: none; padding: 0; margin: 0; }
.chan li { margin-bottom: 7px; }
.chan .luoi { gap: 30px; }
@media (min-width: 900px) { .chan .luoi { grid-template-columns: 1.5fr 1fr 1fr 1fr; } }
.chan .logo-chan { display: inline-block; margin-bottom: 14px; }
.chan .logo-chan img { height: 78px; width: auto; }
.chan .cuoi { border-top: 1px solid rgba(255,255,255,.12); margin-top: 30px; padding-top: 16px; font-size: 13px; text-align: center; }

/* Thanh 5 nut day dien thoai */
.thanh-duoi {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  display: grid; grid-template-columns: repeat(5, 1fr); align-items: end;
  padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
  background: #fff; border-top: 1px solid var(--vien); box-shadow: 0 -6px 20px rgba(13,27,51,.08);
}
.thanh-duoi a { display: flex; flex-direction: column; align-items: center; gap: 2px; text-decoration: none; color: var(--chu-nhat); font-size: 11.5px; font-weight: 600; }
.thanh-duoi a svg { width: 22px; height: 22px; }
.thanh-duoi a.giua { color: var(--cam); }
.thanh-duoi a.giua span { width: 54px; height: 54px; margin-top: -26px; border-radius: 50%; background: var(--cam); color: #fff; display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 16px rgba(240,138,36,.45); border: 4px solid #fff; }
.thanh-duoi a.giua svg { width: 24px; height: 24px; }
@media (min-width: 1100px) { .thanh-duoi { display: none; } body { padding-bottom: 0; } }