:root{
  --xanh:#1c3427;--xanh-dam:#11211a;--xanh-2:#2a4a38;--vang:#d6b06c;--vang-dam:#b8914c;
  --kem:#f6f1e7;--kem-2:#efe7d6;--chu:#26302a;--mo:#5f6a63;--vien:#e3dccd;--trang:#fff;
  --bo:14px;--bong:0 10px 30px rgba(17,33,26,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,sans-serif;color:var(--chu);background:var(--trang);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:'Lora',Georgia,serif;line-height:1.25;color:var(--xanh-dam)}
h1{font-size:clamp(30px,4.6vw,52px);font-weight:700}
h2{font-size:clamp(24px,3vw,36px);font-weight:700}
h3{font-size:19px;font-weight:600}
.khung{max-width:1200px;margin:0 auto;padding:0 20px}
.ic{width:20px;height:20px;flex:none}

/* đầu trang */
.dau{position:sticky;top:0;z-index:50;background:rgba(17,33,26,.97);backdrop-filter:blur(8px);border-bottom:1px solid rgba(214,176,108,.25)}
.dau-in{display:flex;align-items:center;justify-content:space-between;height:74px;gap:16px}
.thuong-hieu{display:flex;align-items:center;gap:10px;color:#fff}
.logo-mai{width:54px;height:22px;flex:none}
.thuong-hieu span{display:flex;flex-direction:column;line-height:1.15}
.thuong-hieu b{font-family:'Lora',serif;font-size:19px;letter-spacing:.5px;white-space:nowrap}
.thuong-hieu small{font-size:11px;color:var(--vang);letter-spacing:1.6px;text-transform:uppercase;white-space:nowrap}
.menu{display:flex;align-items:center;gap:4px}
.menu a{color:#e8e3d8;font-size:15px;font-weight:500;padding:8px 12px;border-radius:8px;white-space:nowrap}
.menu a:hover,.menu a.on{color:var(--vang)}
.nut-menu{display:none;background:none;border:0;width:42px;height:42px;cursor:pointer;flex-direction:column;justify-content:center;gap:6px;align-items:center}
.nut-menu i{display:block;width:24px;height:2px;background:#fff;border-radius:2px}

/* nút */
.nut{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:999px;font-weight:600;font-size:15px;transition:.2s;border:2px solid transparent;cursor:pointer;white-space:nowrap}
.nut .ic{width:18px;height:18px}
.nut-vang{background:var(--vang);color:var(--xanh-dam)}
.nut-vang:hover{background:#e2bf7e}
.menu .nut-vang{color:var(--xanh-dam);margin-left:8px}
.nut.nho{padding:9px 16px;font-size:14px}
.nut-trang{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.55)}
.nut-trang:hover{background:rgba(255,255,255,.22)}
.nut-vien{border-color:var(--vang);color:var(--vang)}
.nut-vien:hover{background:rgba(214,176,108,.12)}
.nut-vien.toi{color:var(--xanh);border-color:var(--xanh)}
.nut-xanh{background:var(--xanh);color:#fff}
.nut-xanh:hover{background:var(--xanh-2)}

/* hero */
.hero{min-height:min(88vh,760px);display:flex;align-items:center;background-size:cover;background-position:center;color:#fff}
.hero-in{padding:90px 20px}
.hero h1{color:#fff;max-width:720px;margin:10px 0 18px}
.hero-mo{max-width:600px;font-size:18px;color:#e9e4da}
.tieu-nho{font-size:13px;font-weight:600;letter-spacing:2.2px;text-transform:uppercase;color:var(--vang-dam)}
.hero .tieu-nho{color:var(--vang)}
.hero-nut{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-diem{list-style:none;display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:40px;color:#e9e4da;font-size:15px}
.hero-diem li{display:flex;align-items:center;gap:8px}
.hero-diem .ic{color:var(--vang)}

/* phần */
.phan{padding:84px 0}
.phan-kem{background:var(--kem)}
.phan-toi{background:var(--xanh-dam);color:#dfe5df}
.phan-toi h2{color:#fff}
.dau-phan{margin-bottom:38px}
.dau-phan h2{margin-top:6px}
.dau-phan.hang{display:flex;justify-content:space-between;align-items:flex-end;gap:16px}
.lien-ket{color:var(--xanh);font-weight:600;white-space:nowrap}
.lien-ket:hover{color:var(--vang-dam)}
.dau-trang{background:var(--kem);padding:56px 0 48px}
.dau-trang h1{margin:8px 0 12px}
.mo-dau{font-size:18px;color:var(--mo);max-width:760px}

/* dịch vụ */
.luoi-dv{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.dv{border:1px solid var(--vien);border-radius:var(--bo);padding:28px;transition:.25s;background:#fff}
.dv:hover{border-color:var(--vang);box-shadow:var(--bong);transform:translateY(-3px)}
.dv .ic{width:40px;height:40px;color:var(--vang-dam);margin-bottom:14px}
.dv h3{margin-bottom:8px}
.dv p{color:var(--mo);font-size:15px}

/* dự án */
.luoi-da{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.the-da{position:relative;border-radius:var(--bo);overflow:hidden;background:#000;display:block;aspect-ratio:4/3}
.the-da img{width:100%;height:100%;object-fit:cover;transition:.5s;opacity:.94}
.the-da:hover img{transform:scale(1.05);opacity:.8}
.the-da::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(10,20,15,.85))}
.chu-the{position:absolute;left:18px;right:18px;bottom:16px;z-index:2;display:flex;flex-direction:column;gap:2px}
.the-da h3{color:#fff;font-size:20px}
.the-da .nhan{color:var(--vang);font-size:13px;font-weight:600;letter-spacing:.5px}
.loc{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.loc button{font:inherit;font-size:14px;font-weight:600;padding:8px 18px;border-radius:999px;border:1px solid var(--vien);background:#fff;color:var(--chu);cursor:pointer}
.loc button.on{background:var(--xanh);color:#fff;border-color:var(--xanh)}
.the-da.an{display:none}

/* album */
.bo-anh{columns:2;column-gap:16px;margin-bottom:60px}
.o-anh{display:block;margin-bottom:16px;break-inside:avoid;border-radius:12px;overflow:hidden;cursor:zoom-in}
.o-anh img{width:100%;height:auto;transition:.4s}
.o-anh:hover img{transform:scale(1.03)}
.nho-h{margin-bottom:22px}
.ghi-chu{margin-top:14px;color:var(--mo);font-size:15px;font-style:italic}
.hop-xem{position:fixed;inset:0;background:rgba(8,14,11,.94);z-index:100;display:flex;align-items:center;justify-content:center}
.hop-xem[hidden]{display:none}
.hop-xem img{max-width:92vw;max-height:88vh;border-radius:8px}
.hop-xem button{position:absolute;background:rgba(255,255,255,.1);color:#fff;border:0;font-size:34px;width:52px;height:52px;border-radius:50%;cursor:pointer}
.hop-xem .dong{top:18px;right:18px}.hop-xem .lui{left:18px}.hop-xem .toi-nut{right:18px}

/* quy trình */
.qt{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:18px;counter-reset:q}
.qt li{position:relative;padding:26px 20px;border-radius:var(--bo);background:var(--kem)}
.qt span{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:var(--xanh);color:var(--vang);font-family:'Lora',serif;font-weight:700;font-size:20px;margin-bottom:14px}
.qt h3{font-size:17px;margin-bottom:6px}
.qt p{font-size:14.5px;color:var(--mo)}
.qt.doc{grid-template-columns:1fr;max-width:760px}
.qt.doc li{display:grid;grid-template-columns:60px 1fr;column-gap:10px}
.qt.doc span{grid-row:span 2;margin:0}

/* hai cột */
.hai-cot{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hai-cot p{margin:16px 0}
.anh-khung{border-radius:var(--bo);overflow:hidden;box-shadow:var(--bong)}
.anh-khung img{width:100%;aspect-ratio:4/3;object-fit:cover}
.dau-tich{list-style:none;margin:16px 0 26px}
.dau-tich li{position:relative;padding-left:28px;margin:8px 0}
.dau-tich li::before{content:"";position:absolute;left:2px;top:.45em;width:14px;height:8px;border-left:2.5px solid var(--vang-dam);border-bottom:2.5px solid var(--vang-dam);transform:rotate(-45deg)}
.phan-toi .dau-tich li::before{border-color:var(--vang)}
.dau-tich.hai{display:grid;grid-template-columns:1fr 1fr;gap:0 30px;max-width:900px}

/* dịch vụ chi tiết */
.dv-dong{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:36px 0;border-bottom:1px solid var(--vien);scroll-margin-top:90px}
.dv-dong:last-child{border:0}
.dv-dong.dao .anh-khung{order:2}
.dv-dong p{color:var(--mo);margin:10px 0}

/* bài viết */
.luoi-bai{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.bai{border:1px solid var(--vien);border-radius:var(--bo);padding:26px;display:flex;flex-direction:column;gap:10px;background:#fff;transition:.25s}
.bai:hover{border-color:var(--vang);box-shadow:var(--bong)}
.bai p{color:var(--mo);font-size:15px;flex:1}
.bai span{color:var(--xanh);font-weight:600;font-size:14px}
.bai-doc{max-width:780px}
.bai-doc h1{margin:8px 0 14px}
.bai-doc h2{font-size:24px;margin:30px 0 8px}
.bai-doc h3{margin:34px 0 10px}
.bai-doc p{font-size:17px}
.hop-lh{margin-top:34px;padding:22px;border-radius:var(--bo);background:var(--kem);border-left:4px solid var(--vang)}
.hop-lh a{color:var(--xanh);font-weight:700}
.ds-bai{padding-left:20px}.ds-bai li{margin:6px 0}.ds-bai a{color:var(--xanh);text-decoration:underline}
.bc{padding-top:16px;padding-bottom:0;font-size:14px;color:var(--mo)}
.bc a:hover{color:var(--xanh)}.bc span{margin:0 6px;color:var(--vang-dam)}.bc b{font-weight:500;color:var(--chu)}

/* liên hệ */
.lh-cot{align-items:stretch}
.the-lh{display:flex;flex-direction:column;gap:12px}
.dong-lh{display:flex;gap:16px;align-items:center;padding:16px 20px;border:1px solid var(--vien);border-radius:12px;background:#fff}
a.dong-lh:hover{border-color:var(--vang)}
.dong-lh .ic{width:28px;height:28px;color:var(--vang-dam)}
.dong-lh span{display:flex;flex-direction:column}
.dong-lh small{color:var(--mo);font-size:13px}
.dong-lh b{font-size:17px;color:var(--xanh-dam)}
.ban-do{border-radius:var(--bo);overflow:hidden;min-height:420px;box-shadow:var(--bong)}
.ban-do iframe{width:100%;height:100%;min-height:420px;border:0}

/* cta + chân trang */
.cta-cuoi{background:linear-gradient(120deg,var(--xanh) 0%,var(--xanh-dam) 100%);color:#fff}
.cta-in{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:48px 20px;flex-wrap:wrap}
.cta-in h2{color:#fff;font-size:28px}
.cta-in p{color:#d3dbd4;margin-top:6px}
.cta-nut{display:flex;gap:12px;flex-wrap:wrap}
.chan{background:#0c1712;color:#b9c3bc;padding:60px 0 0;font-size:15px}
.chan-luoi{display:grid;grid-template-columns:1.3fr 1.3fr 1fr 1fr;gap:36px}
.chan h3{color:#fff;font-size:17px;margin-bottom:14px}
.chan .mo{margin-top:14px;max-width:360px}
.lh,.ds{list-style:none}
.lh li{display:flex;gap:10px;align-items:flex-start;margin:9px 0}
.lh .ic{color:var(--vang);margin-top:3px;width:18px;height:18px}
.ds li{margin:7px 0}
.chan a:hover{color:var(--vang)}
.ban-quyen{border-top:1px solid rgba(255,255,255,.08);margin-top:44px;padding:20px;font-size:13px;color:#7f8b83;text-align:center}

/* nút nổi */
.nut-noi{position:fixed;right:18px;bottom:18px;display:flex;flex-direction:column;gap:12px;z-index:60}
.nut-noi a{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(0,0,0,.25);font-weight:700;font-size:14px}
.nut-noi .zalo{background:#0068ff;color:#fff}
.nut-noi .goi{background:var(--vang);color:var(--xanh-dam);animation:rung 2.4s infinite}
.nut-noi .goi svg{width:26px;height:26px}
@keyframes rung{0%,86%,100%{transform:none}90%{transform:rotate(-12deg)}95%{transform:rotate(12deg)}}

/* responsive */
/* nhóm mẫu theo công trình */
.luoi-nhom{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.o-nhom{position:relative;display:flex;flex-direction:column;justify-content:flex-end;min-height:260px;border-radius:var(--bo);overflow:hidden;background-size:cover;background-position:center;color:#fff;padding:20px;transition:.3s}
.o-nhom:hover{transform:translateY(-4px);box-shadow:var(--bong)}
.o-nhom h3{color:#fff;font-size:20px;margin-top:4px}
.o-nhom span{font-size:12px;font-weight:600;letter-spacing:1.6px;text-transform:uppercase;color:var(--vang)}
.hero.hero-nho{min-height:0}.hero-nho .hero-in{padding:80px 20px 70px}.hero-nho h1{font-size:clamp(28px,4vw,44px)}
.luoi-da.cach{margin-top:34px}
.luoi-da.ba{margin:14px 0 8px}
.xem-them{margin-top:22px;text-align:right}
.hoi-cot{align-items:start}
.hoi{border-bottom:1px solid var(--vien);padding:14px 0}
.hoi summary{cursor:pointer;font-weight:600;color:var(--xanh-dam);list-style:none;position:relative;padding-right:28px}
.hoi summary::-webkit-details-marker{display:none}
.hoi summary::after{content:"+";position:absolute;right:0;top:-2px;font-size:22px;color:var(--vang-dam)}
.hoi[open] summary::after{content:"–"}
.hoi p{margin-top:8px;color:var(--mo)}
.hoi-cot h3{margin:10px 0 12px}
.the-nhom-nho{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.the-nhom-nho a,.the-nhom-nho span{border:1px solid var(--vien);background:#fff;border-radius:999px;padding:6px 14px;font-size:14px;color:var(--xanh)}
.the-nhom-nho a:hover{border-color:var(--vang);color:var(--vang-dam)}
.dau-trang .tieu-nho a{color:inherit;text-decoration:underline}
.bai-doc .luoi-da .the-da h3{font-size:17px}
@media (max-width:1100px){
  .luoi-nhom{grid-template-columns:repeat(3,1fr)}.luoi-dv{grid-template-columns:repeat(2,1fr)}.chan-luoi{grid-template-columns:1fr 1fr}
  .menu{position:fixed;top:74px;left:0;right:0;background:var(--xanh-dam);flex-direction:column;align-items:stretch;padding:12px 20px 22px;gap:2px;display:none;border-bottom:1px solid rgba(214,176,108,.3)}
  .mo-menu .menu{display:flex}
  .menu a{padding:12px 6px;font-size:16px}
  .menu .nut-vang{margin:10px 0 0;justify-content:center}
  .nut-menu{display:flex}
  .qt{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .luoi-dv,.luoi-da,.luoi-bai{grid-template-columns:repeat(2,1fr)}
  .hai-cot,.dv-dong{grid-template-columns:1fr;gap:28px}
  .dv-dong.dao .anh-khung{order:0}
  .chan-luoi{grid-template-columns:1fr}
  .phan{padding:60px 0}
}
@media (max-width:600px){
  .luoi-nhom{grid-template-columns:1fr 1fr;gap:10px}.o-nhom{min-height:170px;padding:14px}.o-nhom h3{font-size:16px}.xem-them{text-align:left}
  body{font-size:15.5px}
  .dau-in{height:64px}.menu{top:64px}
  .thuong-hieu b{font-size:16px}.thuong-hieu small{font-size:9.5px;letter-spacing:1px}.logo-mai{width:44px}
  .luoi-dv,.luoi-da,.luoi-bai,.qt,.dau-tich.hai{grid-template-columns:1fr}
  .luoi-dv{gap:12px}
  .dv{display:grid;grid-template-columns:44px 1fr;column-gap:14px;padding:18px}
  .dv .ic{width:34px;height:34px;margin:2px 0 0;grid-row:span 2}
  .dv h3{margin-bottom:4px;font-size:18px}
  .luoi-bai{gap:12px}.bai{padding:20px}
  .hero{min-height:0}.hero-in{padding:64px 20px}
  .hero-mo{font-size:16px}
  .hero-diem{flex-direction:column;gap:10px;margin-top:28px}
  .bo-anh{columns:1}
  .dau-phan.hang{flex-direction:column;align-items:flex-start}
  .cta-in h2{font-size:23px}
  .nut{padding:12px 18px}
  .nut-noi a{width:50px;height:50px}
}