/* =========================================================
   INTEC ELEVATOR — style.css  (mobile-first, không framework)
   Hệ màu, font, khoảng cách: xem _QUYET_DINH.md
   ========================================================= */

/* ---------- Font tự host: Be Vietnam Pro (SIL OFL 1.1) ---------- */
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/be-vietnam-pro-vietnamese-400-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/be-vietnam-pro-latin-400-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/be-vietnam-pro-vietnamese-600-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/be-vietnam-pro-latin-600-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/be-vietnam-pro-vietnamese-700-normal.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Be Vietnam Pro";font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/be-vietnam-pro-latin-700-normal.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

/* ---------- Token ---------- */
:root{
  --ink:#0F1B26;          /* nền tối, chữ chính */
  --navy:#0B2A4D;         /* màu logo INTEC */
  --steel:#2F4E6D;        /* xanh thép – liên kết, nhấn */
  --steel-2:#5B7A99;
  --brass:#7A5A2E;        /* đồng thau – nhấn mảng gia đình (đạt 4.5:1 trên nền sáng) */
  --brass-l:#C9A46A;      /* đồng thau sáng – chỉ dùng trên nền tối */
  --bg:#FAF8F5;           /* nền ngà ấm */
  --paper:#FFFFFF;
  --sand:#EFEAE2;
  --line:#DCD5CA;
  --text:#1A2430;
  --muted:#4F5B66;
  --on-dark:#F2EFEA;
  --on-dark-muted:#B8C2CC;
  --flag-r:#D7262B; --flag-y:#F2B705;
  --radius:14px; --radius-s:8px;
  --shadow:0 1px 2px rgba(15,27,38,.06),0 8px 24px rgba(15,27,38,.06);
  --wrap:1240px; --gutter:20px;
  --s1:.5rem; --s2:1rem; --s3:1.5rem; --s4:2rem; --s5:3rem; --s6:4.5rem; --s7:6.5rem;
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}

/* ---------- Reset nhẹ ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;font-family:var(--font);font-size:1rem;line-height:1.65;color:var(--text);background:var(--bg);text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%;height:auto}
a{color:var(--steel);text-underline-offset:.18em}
a:hover{color:var(--navy)}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .6em;color:var(--ink);font-weight:600;letter-spacing:-.015em}
h1{font-size:clamp(2rem,6.2vw,3.5rem);letter-spacing:-.025em}
h2{font-size:clamp(1.6rem,4vw,2.4rem)}
h3{font-size:clamp(1.15rem,2.2vw,1.35rem)}
p{margin:0 0 1em}
ul,ol{padding-left:1.2em;margin:0 0 1em}
:focus-visible{outline:3px solid var(--flag-y);outline-offset:3px;border-radius:4px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.7rem 1rem;z-index:100}
.skip:focus{left:var(--gutter);top:.5rem}

/* ---------- Bố cục ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}
.section{padding:var(--s6) 0}
.section--tight{padding:var(--s5) 0}
.section--sand{background:var(--sand)}
.section--paper{background:var(--paper)}
.section--dark{background:var(--ink);color:var(--on-dark)}
.section--dark h2,.section--dark h3{color:#fff}
.section--dark p,.section--dark li{color:var(--on-dark-muted)}
.section--dark a{color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:.6rem;font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);margin-bottom:.9rem}
.eyebrow::before{content:"";width:28px;height:2px;background:linear-gradient(90deg,var(--ink) 0 33%,var(--flag-r) 33% 66%,var(--flag-y) 66%)}
.section--dark .eyebrow{color:var(--brass-l)}
.section--dark .eyebrow::before{background:linear-gradient(90deg,#fff 0 33%,var(--flag-r) 33% 66%,var(--flag-y) 66%)}
.lead{font-size:clamp(1.05rem,2vw,1.2rem);color:var(--muted);max-width:62ch}
.section--dark .lead{color:var(--on-dark-muted)}
.head{max-width:760px;margin-bottom:var(--s4)}
.grid{display:grid;gap:var(--s3)}
@media (min-width:640px){.grid-2{grid-template-columns:repeat(2,1fr)}}
@media (min-width:900px){.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}
@media (min-width:640px) and (max-width:899px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
.split{display:grid;gap:var(--s4);align-items:center}
@media (min-width:900px){.split{grid-template-columns:1fr 1fr;gap:var(--s5)}.split--wide-l{grid-template-columns:1.15fr .85fr}}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;min-height:48px;padding:.75rem 1.4rem;border-radius:999px;font:600 1rem/1.2 var(--font);text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s}
.btn--primary{background:var(--ink);color:#fff}
.btn--primary:hover{background:var(--navy);color:#fff}
.btn--ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn--ghost:hover{background:var(--ink);color:#fff}
.btn--light{background:#fff;color:var(--ink)}
.btn--light:hover{background:var(--sand);color:var(--ink)}
.btn--line-light{border-color:rgba(255,255,255,.7);color:#fff}
.btn--line-light:hover{background:#fff;color:var(--ink)}
.btns{display:flex;flex-wrap:wrap;gap:.75rem}
.link-arrow{font-weight:600;text-decoration:none;display:inline-flex;gap:.4rem;align-items:center}
.link-arrow::after{content:"→";transition:transform .2s}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- Đánh dấu cần bổ sung/xác nhận ---------- */
mark.todo{background:#FFF1B8;color:#5A3E00;padding:.05em .35em;border-radius:4px;font-size:.85em;font-weight:600;white-space:normal;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.section--dark mark.todo{background:#5A4A12;color:#FFE9A8}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(250,248,245,.94);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.hdr{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:1rem}
.logo{display:inline-flex;align-items:center;color:var(--navy);text-decoration:none}
.logo svg{height:30px;width:auto}
.logo .tag{font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-left:.7rem;padding-left:.7rem;border-left:1px solid var(--line);line-height:1.2;display:none}
@media (min-width:1100px){.logo .tag{display:block}}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--line);border-radius:12px;background:var(--paper);cursor:pointer;color:var(--ink)}
.nav-toggle svg{width:22px;height:22px}
.site-nav{display:none}
.site-nav.is-open{display:block;position:absolute;left:0;right:0;top:100%;background:var(--bg);border-bottom:1px solid var(--line);max-height:calc(100vh - 68px);overflow:auto;padding:.5rem var(--gutter) 1.5rem}
.site-nav ul{list-style:none;margin:0;padding:0}
.site-nav a{display:block;padding:.8rem 0;color:var(--ink);text-decoration:none;font-weight:600;border-bottom:1px solid var(--line)}
.site-nav .sub a{font-weight:400;padding-left:1rem;color:var(--muted)}
.site-nav a[aria-current="page"]{color:var(--steel)}
.nav-cta{margin-top:1rem}
.nav-cta .btn{width:100%}
.hdr-cta{display:none}
@media (min-width:1100px){
  .nav-toggle{display:none}
  .site-nav,.site-nav.is-open{display:block;position:static;background:none;border:0;padding:0;max-height:none;overflow:visible}
  .site-nav>ul{display:flex;gap:.2rem;align-items:center}
  .site-nav>ul>li{position:relative}
  .site-nav a{border:0;padding:.55rem .75rem;font-size:.95rem;border-radius:8px}
  .site-nav>ul>li>a:hover{background:var(--sand)}
  .site-nav .has-sub>a::after{content:"";display:inline-block;width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-3px);margin-left:.5rem}
  .site-nav .sub{position:absolute;top:100%;left:0;min-width:270px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:.5rem;opacity:0;visibility:hidden;transform:translateY(6px);transition:.18s}
  .site-nav .has-sub:hover .sub,.site-nav .has-sub:focus-within .sub{opacity:1;visibility:visible;transform:none}
  .site-nav .sub a{padding:.6rem .8rem;color:var(--ink)}
  .site-nav .sub a:hover{background:var(--sand)}
  .nav-cta{display:none}
  .hdr-cta{display:inline-flex;min-height:44px;padding:.6rem 1.2rem;font-size:.95rem}
}

/* ---------- Hero trang chủ ---------- */
.hero{padding:var(--s4) 0 var(--s6)}
.hero-grid{display:grid;gap:var(--s4);align-items:center}
.hero h1{margin-bottom:.45em}
.hero .lead{margin-bottom:1.6rem}
.hero-media{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/5;background:var(--sand)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-badge{position:absolute;left:1rem;bottom:1rem;right:1rem;background:rgba(15,27,38,.82);color:#fff;border-radius:12px;padding:.85rem 1rem;font-size:.88rem;line-height:1.45;backdrop-filter:blur(6px)}
.hero-badge strong{display:block;font-size:1rem}
.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-top:var(--s4)}
.fact{background:var(--bg);padding:1rem 1.1rem}
.fact b{display:block;font-size:clamp(1.25rem,3vw,1.6rem);color:var(--ink);font-weight:700;letter-spacing:-.02em;line-height:1.15}
.fact span{font-size:.86rem;color:var(--muted);line-height:1.4;display:block;margin-top:.25rem}
@media (min-width:900px){
  .hero{padding:var(--s5) 0 var(--s6)}
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:var(--s5)}
  .hero-media{aspect-ratio:4/5;max-height:640px}
  .facts{grid-template-columns:repeat(4,1fr)}
}

/* ---------- Bộ chọn đối tượng (tab) ---------- */
.aud{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:var(--s3)}
.aud-tabs{display:flex;gap:.5rem;overflow-x:auto;padding-bottom:.25rem;margin-bottom:var(--s3);scrollbar-width:thin}
.aud-tabs button{flex:0 0 auto;min-height:44px;padding:.55rem 1.1rem;border-radius:999px;border:1.5px solid var(--line);background:var(--bg);font:600 .95rem var(--font);color:var(--ink);cursor:pointer}
.aud-tabs button[aria-selected="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.aud-panel h3{margin-bottom:.4rem}
.aud-panel ul{list-style:none;padding:0;margin:1rem 0 1.25rem;display:grid;gap:.55rem}
.aud-panel li{padding-left:1.6rem;position:relative}
.aud-panel li::before{content:"";position:absolute;left:0;top:.62em;width:.9rem;height:2px;background:var(--steel)}
.js .aud-panel[hidden]{display:none}
.no-js .aud-tabs{display:none}
.no-js .aud-panel{border-top:1px solid var(--line);padding-top:1rem;margin-top:1rem}

/* ---------- Thẻ giải pháp ---------- */
.card{position:relative;display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card-media{aspect-ratio:4/3;overflow:hidden;background:var(--sand)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:1.2rem 1.25rem 1.4rem;display:flex;flex-direction:column;gap:.4rem;flex:1}
.card-body p{color:var(--muted);font-size:.95rem;margin:0}
.card-kicker{font-size:.75rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--brass)}
.card h3{margin:0}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a::after{content:"";position:absolute;inset:0}
.card .link-arrow{margin-top:auto;padding-top:.6rem;color:var(--steel)}

/* ---------- Nội thất (kiểu "thang máy là nội thất") ---------- */
.interior{display:grid;gap:var(--s4)}
.interior-feature{border-radius:var(--radius);overflow:hidden;aspect-ratio:16/10;background:var(--ink)}
.interior-feature img{width:100%;height:100%;object-fit:cover}
.styles{display:grid;gap:var(--s3);grid-template-columns:repeat(3,minmax(0,1fr))}
.style{text-decoration:none;color:var(--ink)}
.style-img{aspect-ratio:3/4;border-radius:var(--radius-s);overflow:hidden;background:var(--sand);margin-bottom:.6rem}
.style-img img{width:100%;height:100%;object-fit:cover;object-position:center 40%}
.style b{display:block;font-weight:600;font-size:.95rem;line-height:1.3}
.style span{display:block;font-size:.82rem;color:var(--muted);line-height:1.4}
@media (min-width:900px){.interior{grid-template-columns:1.2fr 1fr;align-items:center}.interior-feature{aspect-ratio:4/5}}
@media (max-width:520px){.styles{gap:.75rem}.style span{display:none}}

/* ---------- Công nghệ (nền tối) ---------- */
.tech{display:grid;gap:1px;background:rgba(255,255,255,.12);border-radius:var(--radius);overflow:hidden}
.tech-item{background:var(--ink);padding:1.5rem 1.4rem;display:grid;gap:.4rem;align-content:start}
.tech-item .num{font-size:.78rem;color:var(--brass-l);letter-spacing:.14em;font-weight:600}
.tech-item h3{font-size:1.1rem;margin:0}
.tech-item p{margin:0;font-size:.95rem}
.tech-img{width:72px;height:72px;border-radius:12px;background:#fff;object-fit:contain;padding:6px;margin-bottom:.4rem}
@media (min-width:640px){.tech{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1100px){.tech{grid-template-columns:repeat(4,1fr)}}
.tech-photo{border-radius:var(--radius);overflow:hidden;aspect-ratio:3/2}
.tech-photo img{width:100%;height:100%;object-fit:cover}

/* ---------- Quy trình ---------- */
.steps{list-style:none;padding:0;margin:0;display:grid;gap:var(--s3);counter-reset:st}
.step{position:relative;padding:1.3rem 1.3rem 1.3rem 4.2rem;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}
.step::before{counter-increment:st;content:counter(st,decimal-leading-zero);position:absolute;left:1.2rem;top:1.15rem;font-weight:700;font-size:1.3rem;color:var(--steel)}
.step h3{font-size:1.05rem;margin-bottom:.3rem}
.step p{margin:0;color:var(--muted);font-size:.95rem}
@media (min-width:900px){.steps{grid-template-columns:repeat(5,1fr)}.step{padding:1.4rem 1.2rem}.step::before{position:static;display:block;margin-bottom:.6rem}}

/* ---------- Chứng nhận / năng lực ---------- */
.proof{list-style:none;padding:0;margin:0;display:grid;gap:.9rem}
.proof li{display:grid;grid-template-columns:auto 1fr;gap:.9rem;align-items:start;padding:1rem 0;border-bottom:1px solid var(--line)}
.proof .yr{font-weight:700;color:var(--steel);min-width:3.5rem;font-size:1.05rem}
.proof p{margin:0;color:var(--muted);font-size:.93rem}
.proof strong{color:var(--ink);display:block}
.photo{border-radius:var(--radius);overflow:hidden}.photo img{border-radius:var(--radius)}
.photo img{width:100%;height:auto}
.photo figcaption{font-size:.85rem;color:var(--muted);padding:.7rem 0 0}

/* ---------- Dự án ---------- */
.projects{list-style:none;margin:0;padding:0;display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.projects li{background:var(--paper);padding:1.1rem 1.2rem}
.projects b{display:block;color:var(--ink)}
.projects span{font-size:.9rem;color:var(--muted)}
@media (min-width:640px){.projects{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1100px){.projects{grid-template-columns:repeat(3,1fr)}}

/* ---------- FAQ ---------- */
.faq details{border-bottom:1px solid var(--line);padding:.2rem 0}
.faq summary{cursor:pointer;list-style:none;padding:1rem 2.2rem 1rem 0;font-weight:600;color:var(--ink);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:.3rem;top:.8rem;font-size:1.4rem;font-weight:400;color:var(--steel)}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);margin:0 0 1rem}

/* ---------- Dải CTA ---------- */
.cta-band{background:var(--navy);color:#fff;border-radius:var(--radius);padding:var(--s5) var(--s3);display:grid;gap:var(--s3);align-items:center;position:relative;overflow:hidden}
.cta-band h2{color:#fff;margin-bottom:.3em}
.cta-band p{color:#D3DCE6;margin:0}
.cta-band::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:linear-gradient(90deg,#1A1A1A 0 33.3%,var(--flag-r) 33.3% 66.6%,var(--flag-y) 66.6%)}
@media (min-width:900px){.cta-band{grid-template-columns:1fr auto;padding:var(--s5)}}

/* ---------- Trang con: tiêu đề + breadcrumb ---------- */
.page-hero{padding:var(--s4) 0 var(--s4);border-bottom:1px solid var(--line)}
.crumbs{font-size:.85rem;margin-bottom:1rem;color:var(--muted)}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.4rem}
.crumbs li+li::before{content:"/";margin-right:.4rem;color:var(--line)}
.crumbs a{color:var(--muted)}
.notice{background:var(--paper);border:1px dashed var(--steel-2);border-radius:var(--radius);padding:var(--s3)}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:var(--on-dark-muted);padding:var(--s6) 0 var(--s3);font-size:.93rem;--logo-k:#F2EFEA}
.site-footer a{color:var(--on-dark);text-decoration:none}
.site-footer a:hover{text-decoration:underline}
.ft-grid{display:grid;gap:var(--s4)}
.ft-brand .logo{color:#fff}
.ft-brand .logo svg{height:34px}
.ft-brand p{margin-top:1rem;max-width:40ch}
.site-footer h2{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:#fff;margin-bottom:1rem}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:.5rem}
.legal{border-top:1px solid rgba(255,255,255,.12);margin-top:var(--s5);padding-top:var(--s3);display:grid;gap:.4rem;font-size:.85rem}
.legal p{margin:0}
@media (min-width:900px){.ft-grid{grid-template-columns:1.4fr 1fr 1fr 1.3fr}}

/* ---------- Thanh liên hệ nhanh trên di động ---------- */
.quickbar{position:fixed;left:0;right:0;bottom:0;z-index:40;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border-top:1px solid var(--line)}
.quickbar a{display:flex;align-items:center;justify-content:center;gap:.5rem;min-height:54px;background:var(--paper);color:var(--ink);font-weight:600;text-decoration:none}
.quickbar a.primary{background:var(--ink);color:#fff}
.quickbar svg{width:18px;height:18px}
body{padding-bottom:54px}
@media (min-width:900px){.quickbar{display:none}body{padding-bottom:0}}

/* ---------- Khung ảnh giữ chỗ ---------- */
.ph{display:flex;align-items:center;justify-content:center;text-align:center;background:repeating-linear-gradient(135deg,var(--sand) 0 12px,#E6E0D6 12px 24px);color:var(--muted);font-size:.85rem;font-weight:600;padding:1rem;border-radius:var(--radius-s);min-height:180px}

/* ---- Bổ sung (phiên song song lượt 1): thư viện ảnh, bảng thông số, chip ---- */
.gal{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:0;padding:0;list-style:none}
@media (min-width:800px){.gal{grid-template-columns:repeat(4,1fr);gap:16px}.gal--3{grid-template-columns:repeat(3,1fr)}}
.gal figure{margin:0}
.gal img{width:100%;aspect-ratio:3/4;object-fit:cover;border-radius:var(--radius-s);background:var(--sand)}
.gal figcaption{font-size:.85rem;color:var(--muted);padding:.5rem 0 0;line-height:1.4}
.spec{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-s);background:var(--paper)}
.spec table{border-collapse:collapse;width:100%;min-width:520px;font-size:.95rem}
.spec th,.spec td{padding:.8rem 1rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec thead th{background:var(--ink);color:#fff;font-weight:600}
.spec tbody th{width:34%;font-weight:600;color:var(--ink);background:var(--bg)}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
.src-note{font-size:.82rem;color:var(--muted);margin-top:.6rem}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0 0 1rem;padding:0}
.chips li{border:1px solid var(--line);background:var(--paper);border-radius:99px;padding:.35rem .9rem;font-size:.88rem;color:var(--text)}
.coll{display:grid;gap:16px}
@media (min-width:900px){.coll{grid-template-columns:repeat(3,1fr)}}
.coll article{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.coll img{width:100%;aspect-ratio:4/5;object-fit:cover}
.coll .c-body{padding:1.1rem 1.2rem 1.3rem}
.coll .c-body p{color:var(--muted);margin:0}
.split>*,.grid>*,.coll>*,.gal>*{min-width:0}

/* ---------- Lượt 2: văn bản dài, form liên hệ ---------- */
.prose h2{font-size:1.25rem;margin:2rem 0 .6rem}
.prose h2:first-child{margin-top:0}
.prose ul{padding-left:1.2rem}
.prose li{margin:.25rem 0}
.form{display:grid;gap:1rem;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:var(--s3)}
.form-note{margin:0;font-size:.9rem;color:var(--muted)}
.f-row{display:grid;gap:1rem;min-width:0}
@media (min-width:640px){.f-row{grid-template-columns:1fr 1fr}}
.field{display:grid;gap:.35rem;min-width:0}
.field label{font-weight:600;color:var(--ink);font-size:.95rem}
.field small{color:var(--muted);font-size:.82rem}
.field input,.field select,.field textarea{width:100%;font:inherit;color:var(--text);background:#fff;border:1px solid #8A949E;border-radius:var(--radius-s);padding:.7rem .8rem;min-height:48px}
.field textarea{resize:vertical}
.field input:focus-visible,.field select:focus-visible,.field textarea:focus-visible,.check input:focus-visible{outline:3px solid var(--steel);outline-offset:2px}
[aria-invalid="true"]{border-color:#B3261E!important;box-shadow:0 0 0 1px #B3261E}
.consent{background:var(--bg);border-radius:var(--radius-s);padding:1rem;font-size:.9rem}
.consent p{margin:0 0 .7rem;color:var(--muted)}
.check{display:flex;gap:.6rem;align-items:flex-start;font-weight:600;color:var(--ink);cursor:pointer}
.check input{width:22px;height:22px;flex:0 0 22px;margin-top:.15rem;accent-color:var(--navy)}
.form-msg{margin:0;font-weight:600}
.form-msg:empty{display:none}
.form-msg.is-err{color:#B3261E}
.form-msg.is-ok{color:#1E6B3A}
.form .btn{justify-self:start}
.contact-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:var(--s3);display:grid;gap:1rem;align-content:start}
.ct-list{margin:0;display:grid;gap:.15rem}
.ct-list dt{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-top:.6rem}
.ct-list dd{margin:0;color:var(--ink);overflow-wrap:anywhere}
.f-row{align-items:start}

/* lượt 3 (03/10 02:30): quy trình 6 bước, chú thích bảng thông số */
@media (min-width:900px){.steps--6{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1200px){.steps--6{grid-template-columns:repeat(6,1fr)}}
.spec caption{caption-side:top;text-align:left;font-weight:600;padding:0 0 .6rem}

/* lượt 4: thẻ dạng liên kết */
a.card{color:inherit;text-decoration:none}
a.card h3{color:var(--ink,inherit)}
a.card:focus-visible{outline:3px solid currentColor;outline-offset:2px}
/* lượt 4: bảng 2 cột không cần cuộn ngang trên di động */
.spec table:not(:has(thead th:nth-child(3))){min-width:0}
@media (max-width:600px){.spec th,.spec td{padding:.65rem .75rem}.spec tbody th{width:40%}}

/* Lượt 5 – thẻ CTA trong lưới giải pháp trang chủ */
.card--cta{background:var(--navy);border-color:var(--navy);justify-content:center}
.card--cta .card-body{padding:1.6rem 1.5rem}
.card--cta .card-kicker{color:#E9D9B8}
.card--cta h3 a,.card--cta .card-body p,.card--cta .link-arrow{color:#fff}
.card--cta .card-body p{color:#DCE4EE}
.mini-links{list-style:none;margin:.6rem 0 0;padding:0;display:flex;flex-wrap:wrap;gap:.4rem .9rem;position:relative;z-index:1}
.mini-links a{color:#fff;font-size:.9rem;text-underline-offset:3px}
.mini-links a:hover,.mini-links a:focus-visible{color:#E9D9B8}

/* Luot 6: Tom tat nhanh (GEO) */
.tldr{border-left:4px solid var(--brass);background:var(--paper);padding:1.1rem 1.25rem;border-radius:6px;max-width:900px}
.tldr h2{font-size:1.05rem;margin:0 0 .4rem;letter-spacing:.02em}
.tldr p{margin:0;line-height:1.65}

/* ===== Phien 04/10/2026: nut Chat Zalo noi, trang Video, trang Tu thiet ke thang ===== */
.zalo-fab{position:fixed;right:12px;bottom:calc(54px + 12px + env(safe-area-inset-bottom,0px));z-index:45;display:inline-flex;align-items:center;gap:.45rem;min-height:48px;padding:.55rem 1rem;border-radius:999px;background:var(--navy);color:#fff;font-weight:600;font-size:.95rem;text-decoration:none;border:2px solid #fff;box-shadow:0 6px 18px rgba(15,27,38,.28)}
.zalo-fab svg{width:22px;height:22px;flex:0 0 22px}
.zalo-fab:hover{background:var(--ink);color:#fff}
.zalo-fab:focus-visible{outline:3px solid var(--flag-y);outline-offset:3px}
body{padding-bottom:calc(54px + 72px)}
@media (min-width:900px){.zalo-fab{right:24px;bottom:24px}body{padding-bottom:0}}
@media print{.zalo-fab,.quickbar{display:none}}

/* Trang video: nen than chi, cuon doc bat dinh (scroll-snap) */
.vpage{background:#1E2227;color:#F2EFEA}
.vpage .vhead{padding-top:.75rem;padding-bottom:.5rem;flex:0 0 auto}
.vpage .vhead h1{color:#fff;font-size:clamp(1.4rem,4vw,2rem);margin:.2rem 0 .3rem}
.vpage .vhead p{margin:0;color:#C9D1D9;font-size:.92rem}
.vpage .crumbs,.vpage .crumbs a{color:#C9D1D9}
.vpage .crumbs{margin-bottom:.3rem}
.vpage mark.todo{background:#5A4A12;color:#FFE9A8}
.vpage{display:flex;flex-direction:column;height:calc(100svh - 68px - 54px);min-height:420px}
.vfeed{flex:1 1 auto;min-height:0;overflow-y:auto;scroll-snap-type:y mandatory;overscroll-behavior:contain}
@media (min-width:900px){.vpage{height:calc(100svh - 68px)}}
.vitem{height:100%;scroll-snap-align:start;scroll-snap-stop:always;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.75rem;padding:1rem var(--gutter)}
.vframe{position:relative;background:#000;border-radius:12px;overflow:hidden;max-width:100%;flex:0 1 auto}
.vframe--video{width:min(100%,1000px);aspect-ratio:16/9;max-height:calc(100% - 5.5rem)}
.vframe--short{height:calc(100% - 5.5rem);aspect-ratio:9/16;max-width:100%}
.vplay{display:block;width:100%;height:100%;padding:0;border:0;background:#000;cursor:pointer;position:relative}
.vplay img{width:100%;height:100%;object-fit:cover}
.vplay-ic{position:absolute;left:50%;top:50%;width:72px;height:72px;margin:-36px 0 0 -36px;border-radius:50%;background:rgba(15,27,38,.82);border:2px solid #fff}
.vplay-ic::after{content:"";position:absolute;left:28px;top:22px;border-style:solid;border-width:14px 0 14px 22px;border-color:transparent transparent transparent #fff}
.vplay:hover .vplay-ic{background:var(--flag-r)}
.vplay:focus-visible{outline:3px solid var(--flag-y);outline-offset:-3px}
.vframe iframe{display:block;width:100%;height:100%;border:0}
.vmeta{text-align:center;max-width:1000px}
.vmeta h2{color:#fff;font-size:1.05rem;margin:0 0 .2rem}
.vmeta p{margin:0}.vmeta a{color:#fff}
@media (prefers-reduced-motion:reduce){.vfeed{scroll-snap-type:y proximity}}

/* Trang tu thiet ke thang */
.cfg{display:grid;gap:var(--s4)}
@media (min-width:900px){.cfg{grid-template-columns:1fr 1fr;align-items:start}}
.cfg-opts{display:grid;gap:1rem;min-width:0}
.cfg-group{border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem;margin:0;background:var(--paper);min-width:0}
.cfg-group legend{font-weight:600;color:var(--ink);padding:0 .3rem}
.cfg-group .src-note{margin:.5rem 0 0}
.opts{display:flex;flex-wrap:wrap;gap:.5rem}
.opt{position:relative}
.opt input{position:absolute;opacity:0;width:1px;height:1px}
.opt span{display:inline-flex;align-items:center;justify-content:center;min-width:64px;min-height:44px;padding:.5rem 1rem;border:1.5px solid #8A949E;border-radius:999px;background:var(--bg);font-weight:600;color:var(--ink);cursor:pointer}
.opt input:checked+span{background:var(--ink);border-color:var(--ink);color:#fff}
.opt input:focus-visible+span{outline:3px solid var(--flag-y);outline-offset:2px}
.cfg-sum{margin:0;font-weight:600}
.cfg-opts .btn{justify-self:start}
.cfg-prev{margin:0;border-radius:var(--radius);overflow:hidden;background:var(--sand);min-width:0}
.cfg-prev img,.cfg-prev svg{display:block;width:100%;height:auto;aspect-ratio:3/4;object-fit:cover}
.cfg-prev figcaption{font-size:.85rem;color:var(--muted);padding:.6rem .8rem}
@media (min-width:900px){.cfg-prev{position:sticky;top:84px}}

/* 04/10: chu sr-only trong bang cuon ngang khong duoc thoat ra ngoai khung (gay tran ngang 375px) */
.spec{position:relative}
@media (max-width:899px){.cfg-prev{order:-1;max-width:360px;width:100%;justify-self:center}}

/* >>> 1C-SITE-BEGIN >>> */
/* =====================================================================
   HỆ MÀU 1C – CEO DUYỆT 04/10/2026 (than chì + đồng + kem ấm) – ÁP DỤNG TOÀN SITE
   Nguồn khối này: _src/style_1c_site.css → chèn vào cuối style.css bằng _tools/c1_apply_css.py
   (sửa ở _src/style_1c_site.css rồi chạy lại script, KHÔNG sửa tay khối này trong style.css).
   Tương phản: nền tối #141414/#1C1C1C → chữ #F2EDE4, nhấn #C9A86A, phụ #BDB5A8.
               nền kem #F5EFE4/#EDE4D3/#FBF8F2 → chữ #1F1A14, đồng #7A5A2E, phụ #5A5045.
               Đồng #B08D57 trên kem CHỈ dùng cho kẻ/viền trang trí (2,7:1).
   ===================================================================== */
:root{
  --c-char:#141414; --c-char-2:#1C1C1C;
  --c-bronze:#B08D57; --c-bronze-l:#C9A86A; --c-bronze-d:#7A5A2E;
  --c-ivory:#F2EDE4; --c-dark-muted:#BDB5A8;
  --c-cream:#F5EFE4; --c-cream-2:#EDE4D3; --c-cream-card:#FBF8F2;
  --c-text:#1F1A14; --c-muted:#5A5045; --c-field:#7D7262;
  --c-rule:rgba(176,141,87,.38); --c-rule-dark:rgba(176,141,87,.28);
  --ink:#1F1A14; --navy:#1C1C1C; --steel:#7A5A2E; --steel-2:#8C7A62;
  --brass:#7A5A2E; --brass-l:#C9A86A;
  --bg:#F5EFE4; --paper:#FBF8F2; --sand:#EDE4D3; --line:#DDD1BC;
  --text:#1F1A14; --muted:#5A5045;
  --on-dark:#F2EDE4; --on-dark-muted:#BDB5A8;
  --radius:4px; --radius-s:2px;
  --shadow:0 1px 2px rgba(31,26,20,.05),0 14px 34px rgba(31,26,20,.08);
}
body{background:var(--c-cream);color:var(--c-text)}
a{color:var(--c-bronze-d)}
a:hover{color:var(--c-text)}
:focus-visible{outline:2px solid var(--c-bronze-d);outline-offset:3px}
.skip{background:var(--c-bronze);color:var(--c-char)}
mark.todo{border:1px solid rgba(90,62,0,.2);border-radius:2px}

/* ---------- Kiểu chữ ---------- */
h1,h2{font-weight:400;letter-spacing:-.02em}
h1{font-size:clamp(2.1rem,5.6vw,3.6rem);line-height:1.12}
h2{font-size:clamp(1.65rem,3.6vw,2.5rem);line-height:1.18}
h3{font-weight:600}
.lead{color:var(--c-muted)}
.eyebrow{color:var(--c-bronze-d);font-size:.74rem;letter-spacing:.22em;gap:.9rem}
.eyebrow::before{width:40px;height:1px;background:var(--c-bronze)}
.section{padding:clamp(4rem,9vw,7.5rem) 0}
.section--tight{padding:var(--s5) 0}
.head{margin-bottom:clamp(2rem,4vw,3.25rem)}
.section--paper,.section--sand{background:var(--c-cream-2)}
.section + .section:not(.section--dark):not(.section--paper):not(.section--sand){border-top:1px solid var(--c-rule)}

/* ---------- Nút ---------- */
.btn{border-radius:2px;font-size:.88rem;letter-spacing:.1em;text-transform:uppercase;padding:.85rem 1.6rem;border-width:1px}
.btn--primary{background:var(--c-text);color:var(--c-cream)}
.btn--primary:hover{background:var(--c-bronze-d);color:var(--c-cream)}
.btn--ghost{border-color:var(--c-text);color:var(--c-text)}
.btn--ghost:hover{background:var(--c-text);color:var(--c-cream)}
.site-header .btn--primary,.hero .btn--primary,.page-hero .btn--primary,.section--dark .btn--primary,.cta-band .btn--light,.site-nav .nav-cta .btn{background:var(--c-bronze);color:var(--c-char);border-color:var(--c-bronze)}
.site-header .btn--primary:hover,.hero .btn--primary:hover,.page-hero .btn--primary:hover,.section--dark .btn--primary:hover,.cta-band .btn--light:hover,.site-nav .nav-cta .btn:hover{background:var(--c-bronze-l);border-color:var(--c-bronze-l);color:var(--c-char)}
.hero .btn--ghost,.page-hero .btn--ghost,.btn--line-light{border-color:var(--c-bronze);color:var(--c-ivory);background:transparent}
.hero .btn--ghost:hover,.page-hero .btn--ghost:hover,.btn--line-light:hover{background:var(--c-ivory);border-color:var(--c-ivory);color:var(--c-char)}
.link-arrow{color:var(--c-bronze-d);letter-spacing:.02em}
.link-arrow::after{color:var(--c-bronze)}

/* ---------- Header tối ---------- */
.site-header{background:rgba(20,20,20,.96);border-bottom:1px solid var(--c-rule-dark)}
.site-header .logo{color:var(--c-ivory);--logo-k:var(--c-ivory)}
.site-header .logo .tag{color:var(--c-bronze-l);border-left-color:var(--c-rule-dark)}
.site-header :focus-visible{outline-color:var(--c-bronze-l)}
.nav-toggle{background:transparent;border-color:rgba(176,141,87,.6);color:var(--c-ivory);border-radius:2px}
.site-nav.is-open{background:var(--c-char);border-bottom-color:var(--c-rule-dark)}
.site-nav a{color:var(--c-ivory);border-bottom-color:rgba(242,237,228,.1)}
.site-nav .sub a{color:var(--c-dark-muted)}
.site-nav a[aria-current="page"]{color:var(--c-bronze-l)}
@media (min-width:1100px){
  .site-nav a{font-size:.9rem;letter-spacing:.02em;border-radius:2px}
  .site-nav>ul>li>a:hover{background:rgba(176,141,87,.14);color:var(--c-ivory)}
  .site-nav .sub{background:var(--c-char-2);border-color:var(--c-rule-dark);box-shadow:0 18px 40px rgba(0,0,0,.45)}
  .site-nav .sub a{color:var(--c-ivory)}
  .site-nav .sub a:hover{background:rgba(176,141,87,.14)}
  .site-nav .sub a[aria-current="page"]{color:var(--c-bronze-l)}
  .hdr-cta{font-size:.8rem;padding:.6rem 1.15rem}
}

/* ---------- Hero trang chủ: tối, ảnh cabin đá tràn mép ---------- */
.hero{position:relative;overflow:hidden;background:var(--c-char);color:var(--c-ivory);padding:0 0 var(--s5)}
.hero h1{color:var(--c-ivory)}
.hero .eyebrow{color:var(--c-bronze-l)}
.hero .lead{color:#CFC6B8}
.hero a:not(.btn){color:var(--c-ivory)}
.hero :focus-visible{outline-color:var(--c-bronze-l)}
.hero-grid{gap:var(--s4)}
.hero-media{order:-1;margin:0 calc(-1 * var(--gutter));border-radius:0;aspect-ratio:4/3;background:var(--c-char-2)}
.hero-media img{object-position:center 42%}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,20,20,0) 45%,rgba(20,20,20,.55) 78%,#141414 100%);pointer-events:none}
.hero-badge{z-index:1;left:var(--gutter);right:var(--gutter);bottom:1rem;background:rgba(20,20,20,.86);border-radius:0;border-left:2px solid var(--c-bronze);color:var(--c-ivory);backdrop-filter:none}
.hero-badge strong{color:var(--c-bronze-l);font-weight:600;letter-spacing:.02em}
.hero .facts{background:var(--c-rule-dark);border:0;border-top:1px solid var(--c-rule-dark);border-bottom:1px solid var(--c-rule-dark);border-radius:0;margin-top:var(--s4)}
.hero .fact{background:var(--c-char);padding:1.15rem .9rem 1.15rem 0}
.hero .fact:nth-child(even){padding-left:1.1rem}
.hero .fact b{color:var(--c-bronze-l);font-weight:400;font-size:clamp(1.35rem,3vw,1.75rem)}
.hero .fact span{color:var(--c-dark-muted)}
.hero mark.todo,.page-hero mark.todo{background:#5A4A12;color:#FFE9A8;border-color:rgba(255,233,168,.25)}
@media (min-width:900px){
  .hero{padding:clamp(4rem,8vw,7rem) 0 clamp(3.5rem,6vw,5.5rem);min-height:min(820px,calc(100vh - 68px))}
  .hero-grid{grid-template-columns:1fr 1fr;gap:var(--s5)}
  .hero-grid>div{max-width:590px;position:relative;z-index:2}
  .hero-media{position:absolute;top:0;right:0;bottom:0;left:52%;margin:0;aspect-ratio:auto;max-height:none}
  .hero-media img{object-position:center 50%}
  .hero-media::after{background:linear-gradient(90deg,#141414 0%,rgba(20,20,20,.55) 14%,rgba(20,20,20,0) 38%),linear-gradient(0deg,rgba(20,20,20,.5) 0%,rgba(20,20,20,0) 30%)}
  .hero-badge{left:auto;right:2.5rem;bottom:2.5rem;max-width:340px;padding:1rem 1.2rem}
  .hero .wrap+.wrap{position:relative;z-index:2}
  .hero .facts{grid-template-columns:repeat(2,1fr);max-width:calc(50% - var(--s5));margin-top:var(--s5)}
  .hero .fact{padding:1.3rem 1.2rem 1.3rem 0}
  .hero .fact:nth-child(even){padding-left:1.4rem}
}
@media (max-width:899px){
  .hero-media{aspect-ratio:1/1;margin:0 calc(-1 * var(--gutter))!important}
  .hero-media img{object-position:center 62%}
  .hero-badge{font-size:0;padding:.6rem .85rem;right:auto;bottom:1.25rem}
  .hero-badge strong{font-size:.85rem;margin:0}
}

/* ---------- Tiêu đề trang con (page-hero): tối ---------- */
.page-hero{background:var(--c-char);color:var(--c-ivory);border-bottom:1px solid var(--c-rule-dark);padding:clamp(2rem,5vw,3.75rem) 0}
.page-hero h1{color:var(--c-ivory)}
.page-hero p,.page-hero .lead{color:#CFC6B8}
.page-hero .eyebrow{color:var(--c-bronze-l)}
.page-hero a:not(.btn){color:var(--c-ivory)}
.page-hero a:not(.btn):hover{color:var(--c-bronze-l)}
.page-hero .crumbs,.page-hero .crumbs li{color:var(--c-dark-muted)}
.page-hero .crumbs li+li::before{color:#7A7064}
.page-hero .src-note,.page-hero .photo figcaption{color:var(--c-dark-muted)}
.page-hero .photo{outline:1px solid var(--c-rule-dark);outline-offset:8px;border-radius:var(--radius)}
.page-hero .chips li{background:transparent;border-color:rgba(176,141,87,.5);color:var(--c-ivory)}
.page-hero .chips a{color:var(--c-ivory)}
.page-hero :focus-visible{outline-color:var(--c-bronze-l)}
@media (max-width:899px){.page-hero .photo{outline-offset:5px}}

/* ---------- Khối nội dung trên nền kem ---------- */
.aud{background:var(--c-cream-card);border-color:var(--line);border-radius:var(--radius);padding:clamp(1.25rem,3vw,2.25rem)}
.aud-tabs button{border-radius:2px;border:1px solid var(--c-field);background:transparent;color:var(--c-text);font-weight:600;font-size:.9rem}
.aud-tabs button:hover{border-color:var(--c-text)}
.aud-tabs button[aria-selected="true"]{background:var(--c-text);border-color:var(--c-text);color:var(--c-cream)}
.aud-panel li::before{background:var(--c-bronze);height:1px}
.card{background:var(--c-cream-card);border-color:var(--line)}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card-kicker{color:var(--c-bronze-d);letter-spacing:.18em}
.card-body{padding:1.4rem 1.4rem 1.6rem}
.card .link-arrow{color:var(--c-bronze-d)}
.card--cta{background:var(--c-char-2);border-color:var(--c-char-2)}
.card--cta .card-kicker{color:var(--c-bronze-l)}
.card--cta h3 a,.card--cta .link-arrow{color:var(--c-ivory)}
.card--cta .card-body p{color:#D9D2C5}
.card--cta .link-arrow::after{color:var(--c-bronze-l)}
.mini-links a{color:var(--c-ivory)}
.mini-links a:hover,.mini-links a:focus-visible{color:var(--c-bronze-l)}
.card--cta :focus-visible{outline-color:var(--c-bronze-l)}
.style-img{border-radius:var(--radius-s)}
.interior-feature{border-radius:var(--radius);outline:1px solid var(--c-rule);outline-offset:10px}
.step{background:var(--c-cream-card);border-color:var(--line);border-top:2px solid var(--c-bronze)}
.step::before{color:var(--c-bronze-d);font-weight:400;font-size:1.6rem}
.proof li{border-bottom-color:var(--c-rule)}
.proof .yr{color:var(--c-bronze-d);font-weight:600}
.photo figcaption{color:var(--c-muted)}
.projects{background:var(--line);border-color:var(--line)}
.projects li{background:var(--c-cream-card)}
/* số liệu (facts) trong trang con – nền kem */
.facts{background:var(--line);border-color:var(--line);border-radius:var(--radius)}
.fact{background:var(--c-cream-card)}
.fact b{color:var(--c-bronze-d);font-weight:600}
.fact span{color:var(--c-muted)}
.coll article{background:var(--c-cream-card);border-color:var(--line)}
.gal img{background:var(--c-cream-2)}
.gal figcaption,.src-note{color:var(--c-muted)}
.chips li{border-radius:2px;background:var(--c-cream-card);border-color:#CDBFA6;color:var(--c-text)}
.ph{background:repeating-linear-gradient(135deg,var(--c-cream-2) 0 12px,#E4D9C5 12px 24px);color:var(--c-muted)}

/* ---------- Tóm tắt nhanh (GEO) ---------- */
.tldr{background:var(--c-cream-card);border:1px solid var(--line);border-left:2px solid var(--c-bronze);border-radius:2px;padding:1.35rem 1.6rem}
.tldr h2{color:var(--c-bronze-d);font-size:.78rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;margin:0 0 .6rem}
.tldr p{color:var(--c-text)}

/* ---------- Bảng thông số ---------- */
.spec{background:var(--c-cream-card);border-color:var(--line);border-radius:2px}
.spec th,.spec td{border-bottom-color:var(--line)}
.spec thead th{background:var(--c-char-2);color:var(--c-ivory);border-bottom:1px solid var(--c-bronze);font-weight:600;letter-spacing:.02em}
.spec tbody th{background:var(--c-cream);color:var(--c-text)}
.spec caption{color:var(--c-text)}
.spec :focus-visible{outline-offset:-2px}

/* ---------- Hỏi – đáp ---------- */
.faq details{border-bottom-color:var(--c-rule)}
.faq summary{color:var(--c-text)}
.faq summary:hover,.faq details[open] summary{color:var(--c-bronze-d)}
.faq summary::after{color:var(--c-bronze-d)}
.faq details p{color:var(--c-muted)}

/* ---------- Form liên hệ ---------- */
.form,.contact-card{background:var(--c-cream-card);border-color:var(--line);border-radius:var(--radius)}
.notice{background:var(--c-cream-card);border-color:#8C7A62;border-radius:var(--radius)}
.field label{color:var(--c-text)}
.field small{color:var(--c-muted)}
.field input,.field select,.field textarea{background:#fff;border:1px solid var(--c-field);border-radius:2px;color:var(--c-text)}
.field input::placeholder,.field textarea::placeholder{color:#6B6155;opacity:1}
.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--c-text)}
.field input:focus-visible,.field select:focus-visible,.field textarea:focus-visible{outline:2px solid var(--c-bronze-d);outline-offset:2px;border-color:var(--c-bronze-d)}
.check{color:var(--c-text)}
.check input{accent-color:var(--c-bronze-d)}
.check input:focus-visible{outline:2px solid var(--c-bronze-d);outline-offset:2px}
.consent{background:var(--c-cream-2);border-radius:2px}
.consent p{color:var(--c-muted)}
[aria-invalid="true"]{border-color:#A1281E!important;box-shadow:0 0 0 1px #A1281E}
.form-msg.is-err{color:#A1281E}
.form-msg.is-ok{color:#1E6B3A}
.ct-list dt{color:var(--c-muted)}
.ct-list dd{color:var(--c-text)}

/* ---------- Tự thiết kế thang ---------- */
.cfg-group{background:var(--c-cream-card);border-color:var(--line);border-radius:var(--radius)}
.cfg-group legend{color:var(--c-text);letter-spacing:.02em}
.opt span{border:1px solid var(--c-field);border-radius:2px;background:var(--c-cream);color:var(--c-text);font-size:.92rem}
.opt span:hover{border-color:var(--c-text)}
.opt input:checked+span{background:var(--c-text);border-color:var(--c-text);color:var(--c-cream);box-shadow:inset 0 -2px 0 var(--c-bronze)}
.opt input:focus-visible+span{outline:2px solid var(--c-bronze-d);outline-offset:2px}
.cfg-prev{background:var(--c-cream-2);border-radius:var(--radius);outline:1px solid var(--c-rule);outline-offset:8px}
.cfg-prev figcaption{color:var(--c-muted)}

/* ---------- Khối tối (công nghệ trang chủ) ---------- */
.section--dark{background:var(--c-char-2);color:var(--c-ivory)}
.section--dark h2,.section--dark h3{color:var(--c-ivory)}
.section--dark p,.section--dark li,.section--dark .lead{color:var(--c-dark-muted)}
.section--dark strong{color:var(--c-ivory)}
.section--dark a{color:var(--c-ivory)}
.section--dark .eyebrow{color:var(--c-bronze-l)}
.section--dark .eyebrow::before{background:var(--c-bronze)}
.section--dark :focus-visible{outline-color:var(--c-bronze-l)}
.tech{background:var(--c-rule-dark);border-radius:0;border-top:1px solid var(--c-rule-dark);border-bottom:1px solid var(--c-rule-dark)}
.tech-item{background:var(--c-char-2);padding:1.8rem 1.5rem}
.tech-item .num{color:var(--c-bronze-l)}
.tech-img{background:var(--c-cream);border-radius:2px}
.tech-photo{border-radius:var(--radius)}

/* ---------- Dải CTA ---------- */
.cta-band{background:var(--c-char);border-radius:var(--radius);color:var(--c-ivory)}
.cta-band::before{height:1px;background:var(--c-bronze);left:var(--s3);right:var(--s3);top:0}
.cta-band h2{color:var(--c-ivory)}
.cta-band p{color:var(--c-dark-muted)}
.cta-band a:not(.btn){color:var(--c-ivory)}
.cta-band mark.todo{background:#5A4A12;color:#FFE9A8}
.cta-band :focus-visible{outline-color:var(--c-bronze-l)}
@media (min-width:900px){.cta-band::before{left:var(--s5);right:var(--s5)}}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-char);color:var(--c-dark-muted);--logo-k:var(--c-ivory);border-top:1px solid var(--c-rule-dark)}
.site-footer a{color:var(--c-ivory)}
.site-footer a:hover{color:var(--c-bronze-l)}
.site-footer :focus-visible{outline-color:var(--c-bronze-l)}
.ft-brand .logo{color:var(--c-ivory)}
.site-footer h2{color:var(--c-bronze-l);font-weight:600;letter-spacing:.2em}
.legal{border-top-color:var(--c-rule-dark)}
.legal strong{color:var(--c-ivory)!important}

/* ---------- Thanh liên hệ nhanh (di động) ---------- */
.quickbar{background:var(--c-rule-dark);border-top:1px solid var(--c-bronze)}
.quickbar a{background:var(--c-char);color:var(--c-ivory);letter-spacing:.02em}
.quickbar a.primary{background:var(--c-bronze);color:var(--c-char)}
.quickbar a:focus-visible{outline:2px solid var(--c-ivory);outline-offset:-4px}

/* ---------- Nút Chat Zalo nổi: tròn, đồng, nằm trên thanh liên hệ nhanh ---------- */
.zalo-fab{right:16px;bottom:calc(54px + 16px + env(safe-area-inset-bottom,0px));z-index:45;gap:.5rem;width:56px;height:56px;min-height:56px;padding:0;justify-content:center;border-radius:50%;background:var(--c-bronze);color:var(--c-char);border:1px solid var(--c-bronze-d);box-shadow:0 0 0 3px rgba(20,20,20,.18),0 10px 26px rgba(0,0,0,.28);font:600 .8rem/1 var(--font);letter-spacing:.08em;text-transform:uppercase}
.zalo-fab svg{width:24px;height:24px;flex:0 0 24px}
.zalo-fab span{display:none}
.zalo-fab:hover{background:var(--c-bronze-l);color:var(--c-char)}
.zalo-fab:focus-visible{outline:2px solid var(--c-bronze-d);outline-offset:3px;box-shadow:0 0 0 5px var(--c-ivory),0 10px 26px rgba(0,0,0,.28)}
@media (min-width:900px){
  .zalo-fab{right:24px;bottom:24px;width:auto;height:auto;min-height:52px;padding:0 1.2rem 0 1rem;border-radius:999px}
  .zalo-fab span{display:inline}
}
/* di động: không lộ nền kem dưới footer; footer chừa chỗ cho thanh liên hệ nhanh + nút Zalo */
@media (max-width:899px){
  body{padding-bottom:0}
  .site-footer{padding-bottom:calc(var(--s3) + 54px + 80px)}
}
.section--tight:last-child{padding-bottom:var(--s6)}

/* ---------- Trang video ---------- */
.vpage{background:var(--c-char);color:var(--c-ivory)}
.vpage .vhead{border-bottom:1px solid var(--c-rule-dark)}
.vpage .vhead h1{color:var(--c-ivory);font-weight:400}
.vpage .vhead p,.vpage .crumbs,.vpage .crumbs li{color:var(--c-dark-muted)}
.vpage .crumbs a{color:var(--c-ivory)}
.vpage .crumbs li+li::before{color:#7A7064}
.vpage :focus-visible{outline-color:var(--c-bronze-l)}
.vframe{border-radius:2px;box-shadow:0 0 0 1px var(--c-rule-dark),0 20px 50px rgba(0,0,0,.5)}
.vplay-ic{background:rgba(20,20,20,.82);border:1px solid var(--c-bronze)}
.vplay-ic::after{border-color:transparent transparent transparent var(--c-ivory)}
.vplay:hover .vplay-ic{background:var(--c-bronze)}
.vplay:hover .vplay-ic::after{border-color:transparent transparent transparent var(--c-char)}
.vplay:focus-visible{outline:2px solid var(--c-bronze-l);outline-offset:-3px}
.vmeta h2{color:var(--c-ivory);font-weight:600}
.vmeta p{color:var(--c-dark-muted)}
.vmeta a{color:var(--c-bronze-l)}
/* video: body không chừa đáy → trang video tính đúng chiều cao */
@media (max-width:899px){.vpage{height:calc(100svh - 68px - 54px)}}

/* tinh chỉnh sau khi xem ảnh QA 1C toàn site */
@media (max-width:899px){.cfg-prev{outline-offset:4px}}
/* nút "Nhận tư vấn" trong menu di động: .site-nav a (padding 0, block) đè .btn → canh giữa lại */
.site-nav .nav-cta .btn{display:flex;justify-content:center;padding:.85rem 1.6rem;border-bottom:1px solid var(--c-bronze)}
/* <<< 1C-SITE-END <<< */

/* >>> BAOGIA-BEGIN >>> (05/10/2026 – trang bao-gia-online, màu 1C) */
.bg-form{display:grid;gap:1.5rem}
.bg-step{border:1px solid #8C7A62;border-radius:var(--radius);padding:1rem;margin:0;display:grid;gap:1rem;min-width:0;background:var(--c-cream-card,#FBF7F0)}
@media (min-width:640px){.bg-step{padding:1.5rem}}
.bg-step legend{font-weight:700;color:var(--c-text,#1F1A14);padding:0 .4rem;font-size:1.05rem}
.f-lbl{font-weight:600;font-size:.95rem;color:var(--c-text,#1F1A14)}
.bg-scope{margin:0;font-size:.9rem;color:var(--c-muted,#5E5446)}
.bg-result{margin-top:1.5rem;padding:1.25rem;border-radius:var(--radius);background:#1C1C1C;color:#F2EDE4;border:1px solid #B08D57}
.bg-result:focus{outline:2px solid #C9A86A;outline-offset:3px}
.bg-result h2{color:#F2EDE4;margin-top:0}
.bg-sum{color:#CFC6B8;margin:.25rem 0}
.bg-price{font-size:1.2rem;margin:.75rem 0;line-height:1.4}
.bg-price .bg-k{display:block;font-size:.9rem;color:#C9A86A}
.bg-price strong{color:#F2EDE4;font-size:clamp(1.25rem,4.5vw,1.7rem)}
.bg-notes{color:#CFC6B8;font-size:.9rem;padding-left:1.1rem}
.bg-result .src-note{color:#B3AA9C}
.bg-result .btn--ghost{color:#F2EDE4;border-color:#C9A86A}
.bg-legal{margin-top:1.5rem}
.bg-legal h2{font-size:1.05rem;margin-top:0}
/* <<< BAOGIA-END <<< */

/* >>> 1E-SITE-BEGIN >>> */
/* Gộp 11/10/2026: lớp 1D (tối chủ đạo) + lớp 1E (bí ẩn, spotlight đồng, hiện dần). Nguồn: assets/css/style-1d.css + style-1e.css */
/* =====================================================================
   MẪU 1D – "TỐI CHỦ ĐẠO" (bản xem thử, CHỜ CEO DUYỆT) – nạp SAU style.css (đã gộp 1C)
   ~80% diện tích nền đen nhiều lớp; kem chỉ cho "tờ giấy chèn": bảng thông số, hỏi–đáp, form, văn bản dài.
   Nền tối : #0E0E0E (hero, footer, CTA) · #141414 · #1A1A1A (xen kẽ) · thẻ #202020, viền mảnh rgba(176,141,87,.25)
   Chữ tối : tiêu đề #F2EDE4 · thân #CFC6B8 · phụ #B3AA9C · ghi chú #ADA496 · nhấn đồng #C9A86A · kẻ/nút #B08D57
   Kem     : #F5EFE4 / thẻ #FBF8F2 / đầu bảng #EDE4D3 · chữ #1F1A14 · đồng đậm #7A5A2E · phụ #4A4036
   Không ảnh nền, không hạt nhiễu (grain) – chỉ gradient CSS nhẹ. Tôn trọng prefers-reduced-motion (style.css).
   ===================================================================== */
:root{
  --d0:#0E0E0E; --d1:#141414; --d2:#1A1A1A; --d3:#202020;
  --hair:rgba(176,141,87,.25); --hair-s:rgba(176,141,87,.45);
  --iv:#F2EDE4; --tx:#CFC6B8; --tx2:#B3AA9C; --tx3:#ADA496;
  --br:#C9A86A; --br2:#B08D57;
  --cr:#F5EFE4; --cr-card:#FBF8F2; --cr-2:#EDE4D3; --ink:#1F1A14; --brd:#7A5A2E; --mut:#4A4036; --cr-line:#E2D6C1;
  --glow:rgba(176,141,87,.11);
  --ease:cubic-bezier(.2,.7,.2,1);
}
html{background:var(--d0)}
body{background:var(--d0);color:var(--tx)}
::selection{background:rgba(201,168,106,.35);color:#fff}
a{color:var(--iv);text-decoration-color:rgba(201,168,106,.55)}
a:hover{color:var(--br)}
:focus-visible{outline:2px solid var(--br);outline-offset:3px}
mark.todo,.hero mark.todo,.page-hero mark.todo,.section--dark mark.todo,.cta-band mark.todo{background:#4A3D10;color:#FFE9A8;border:1px solid rgba(255,233,168,.28);border-radius:2px}

/* ---------- Kiểu chữ trên nền tối ---------- */
h1,h2,h3,h4{color:var(--iv)}
h1,h2{font-weight:400;letter-spacing:-.015em}
h3{font-weight:600;letter-spacing:-.005em}
p,li{color:var(--tx)}
strong{color:var(--iv)}
.lead{color:var(--tx)}
.eyebrow{color:var(--br);letter-spacing:.3em;font-size:.72rem}
.eyebrow::before{width:44px;height:1px;background:linear-gradient(90deg,transparent,var(--br2))}
.src-note{color:var(--tx3)}

/* ---------- Nhịp nền: đen nhiều lớp + đường kẻ ánh đồng giữa các khối ---------- */
.section{position:relative;background:radial-gradient(42% 340px at 6% 0%,rgba(176,141,87,.075),transparent 72%),var(--d2);color:var(--tx)}
.section--paper{background:radial-gradient(42% 340px at 6% 0%,rgba(176,141,87,.075),transparent 72%),var(--d1)}
.section--sand{background:radial-gradient(55% 60% at 12% 0%,var(--glow),transparent 70%),var(--d0)}
.section--dark{background:radial-gradient(50% 70% at 88% 10%,var(--glow),transparent 70%),var(--d1)}
.section + .section:not(.section--dark):not(.section--paper):not(.section--sand){border-top:0}
.section::before{content:"";position:absolute;top:0;left:50%;width:min(1120px,86%);height:1px;transform:translateX(-50%);background:linear-gradient(90deg,transparent,rgba(176,141,87,.38),transparent);pointer-events:none}
.section--tight::before{display:none}
.head h2,.section h2{color:var(--iv)}
.section--dark p,.section--dark li,.section--dark .lead{color:var(--tx)}

/* ---------- Nút ---------- */
.btn{transition:background .35s var(--ease),color .35s var(--ease),border-color .35s var(--ease),box-shadow .35s var(--ease)}
.btn--primary,.btn--light,.site-header .btn--primary,.hero .btn--primary,.page-hero .btn--primary,.section--dark .btn--primary,.cta-band .btn--light,.site-nav .nav-cta .btn{background:var(--br2);border-color:var(--br2);color:var(--d0)}
.btn--primary:hover,.btn--light:hover,.site-header .btn--primary:hover,.hero .btn--primary:hover,.page-hero .btn--primary:hover,.section--dark .btn--primary:hover,.cta-band .btn--light:hover,.site-nav .nav-cta .btn:hover{background:var(--br);border-color:var(--br);color:var(--d0);box-shadow:0 10px 30px -10px rgba(201,168,106,.55)}
.btn--ghost,.btn--line-light,.hero .btn--ghost,.page-hero .btn--ghost{background:transparent;border-color:var(--br2);color:var(--iv)}
.btn--ghost:hover,.btn--line-light:hover,.hero .btn--ghost:hover,.page-hero .btn--ghost:hover{background:rgba(176,141,87,.14);border-color:var(--br);color:var(--iv)}
.link-arrow,.card .link-arrow{color:var(--iv)}
.link-arrow::after{color:var(--br)}
.link-arrow:hover{color:var(--br)}

/* ---------- Header: trong suốt ở đầu trang → đặc #0E0E0E khi cuộn (lớp .hdr-top do script nhỏ gắn; không JS = đặc) ---------- */
.site-header{background:rgba(14,14,14,.94);border-bottom:1px solid var(--hair);transition:background .4s var(--ease),border-color .4s var(--ease),box-shadow .4s var(--ease)}
.site-header.is-scrolled{box-shadow:0 12px 30px -12px rgba(0,0,0,.7)}
.hdr-top .site-header:not(.is-scrolled){background:transparent;border-bottom-color:transparent;-webkit-backdrop-filter:none;backdrop-filter:none}
.site-header:has(.site-nav.is-open){background:var(--d0)!important}
.site-header .logo .tag{color:var(--br)}
.site-nav.is-open{background:var(--d0);border-bottom-color:var(--hair)}
.site-nav a{color:var(--iv);border-bottom-color:rgba(242,237,228,.08)}
.site-nav .sub a{color:var(--tx2)}
.site-nav a[aria-current="page"]{color:var(--br)}
@media (min-width:1100px){
  .site-nav>ul>li>a{position:relative}
  .site-nav>ul>li>a:hover{background:transparent;color:var(--br)}
  .site-nav>ul>li>a::before{content:"";position:absolute;left:.75rem;right:.75rem;bottom:.3rem;height:1px;background:var(--br2);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
  .site-nav>ul>li>a:hover::before,.site-nav>ul>li>a:focus-visible::before{transform:scaleX(1)}
  .site-nav .sub{background:rgba(20,20,20,.98);border-color:var(--hair);border-radius:2px;box-shadow:0 24px 50px rgba(0,0,0,.6)}
  .site-nav .sub a{color:var(--iv)}
  .site-nav .sub a:hover{background:rgba(176,141,87,.12);color:var(--iv)}
}

/* ---------- Hero trang chủ: đen sâu, ánh đồng, ảnh cabin chìm vào bóng tối, nằm dưới header ---------- */
.hero{margin-top:-69px;padding-top:0;background:radial-gradient(60% 55% at 16% 38%,rgba(176,141,87,.14),transparent 68%),var(--d0)}
.hero .lead{color:var(--tx)}
.hero h1{font-weight:400;letter-spacing:-.02em}
.hero-media{background:var(--d1)}
.hero-media img{filter:brightness(.86) contrast(1.06) saturate(.92)}
.hero-media::after{background:
  linear-gradient(180deg,rgba(14,14,14,.92) 0,rgba(14,14,14,.8) 72px,rgba(14,14,14,0) 34%),
  linear-gradient(180deg,rgba(14,14,14,0) 45%,rgba(14,14,14,.6) 76%,#0E0E0E 100%)}
.hero-badge{background:rgba(14,14,14,.84);border:1px solid var(--hair);border-left:2px solid var(--br2);color:var(--iv)}
.hero-badge strong{color:var(--br)}
.hero .facts{background:var(--hair);border-top-color:var(--hair);border-bottom-color:var(--hair)}
.hero .fact{background:var(--d0)}
.hero .fact b{color:var(--br);font-weight:400}
.hero .fact span{color:var(--tx2)}
@media (min-width:900px){
  .hero{padding-top:calc(69px + clamp(4rem,8vw,7rem));min-height:min(889px,100vh)}
  .hero-media::after{background:
    linear-gradient(180deg,rgba(14,14,14,.94) 0,rgba(14,14,14,.8) 80px,rgba(14,14,14,0) 24%),
    linear-gradient(90deg,#0E0E0E 0%,rgba(14,14,14,.6) 16%,rgba(14,14,14,0) 42%),
    linear-gradient(0deg,#0E0E0E 0%,rgba(14,14,14,0) 32%),
    radial-gradient(120% 90% at 70% 50%,rgba(14,14,14,0) 55%,rgba(14,14,14,.55) 100%)}
  .hero::after{content:"";position:absolute;top:0;bottom:0;left:52%;width:1px;background:linear-gradient(180deg,transparent 8%,rgba(201,168,106,.45) 45%,transparent 92%);z-index:1;pointer-events:none}
}

/* ---------- Tiêu đề trang con ---------- */
.page-hero{background:radial-gradient(55% 80% at 85% 20%,rgba(176,141,87,.12),transparent 70%),var(--d0);border-bottom:1px solid var(--hair)}
.page-hero p,.page-hero .lead{color:var(--tx)}
.page-hero .crumbs,.page-hero .crumbs li{color:var(--tx2)}
.page-hero .crumbs a{color:var(--iv)}
.page-hero .photo{outline:1px solid var(--hair-s);outline-offset:10px;border-radius:2px}
.page-hero .photo img{border-radius:2px}
.page-hero .photo figcaption,.page-hero .src-note{color:var(--tx3)}
.page-hero .chips li{border-color:var(--hair-s);color:var(--iv)}

/* ---------- Thẻ & khối nội dung trên nền tối ---------- */
.card,.coll article{background:var(--d3);border:1px solid var(--hair);border-radius:2px;transition:border-color .45s var(--ease),transform .45s var(--ease),box-shadow .45s var(--ease)}
.card:hover{border-color:rgba(201,168,106,.6);transform:translateY(-4px);box-shadow:0 26px 50px -24px rgba(0,0,0,.85)}
.card h3 a,a.card h3{color:var(--iv)}
.card-kicker{color:var(--br);letter-spacing:.22em}
.card-body p,.coll .c-body p{color:var(--tx2)}
.card-media{position:relative;background:var(--d1)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,14,14,.1) 0,rgba(14,14,14,0) 30%,rgba(32,32,32,.35) 62%,#202020 100%),radial-gradient(120% 95% at 50% 35%,rgba(14,14,14,0) 55%,rgba(14,14,14,.5) 100%);pointer-events:none}
.card-media img{filter:brightness(.74) contrast(1.06) saturate(.85);transition:transform .9s var(--ease),filter .6s var(--ease)}
.card:hover .card-media img{filter:brightness(.92) contrast(1.04) saturate(1);transform:scale(1.04)}
.card--cta{background:radial-gradient(80% 70% at 100% 0%,rgba(176,141,87,.16),transparent 70%),var(--d0);border-color:var(--hair-s)}
.card--cta .card-body p{color:var(--tx)}
.card--cta h3 a,.mini-links a{color:var(--iv)}

.aud{background:var(--d2);border:1px solid var(--hair);border-radius:2px}
.aud-tabs button{background:transparent;border:1px solid rgba(176,141,87,.8);color:var(--iv);transition:background .3s,border-color .3s,color .3s}
.aud-tabs button:hover{border-color:var(--br)}
.aud-tabs button[aria-selected="true"]{background:var(--br2);border-color:var(--br2);color:var(--d0)}
.aud-panel li::before{background:var(--br2)}

.style{color:var(--iv)}
.style b{color:var(--iv)}
.style span{color:var(--tx2)}
.style-img{background:var(--d3);outline:1px solid transparent;outline-offset:4px;transition:outline-color .4s}
.style-img img,.interior-feature img,.gal img,.coll img{filter:brightness(.88) saturate(.92);transition:filter .6s var(--ease),transform .9s var(--ease)}
.style:hover .style-img{outline-color:var(--hair-s)}
.style:hover .style-img img{filter:none}
.interior-feature{outline:1px solid var(--hair-s);outline-offset:12px;border-radius:2px}

.tech{background:var(--hair)}
.tech-item{background:var(--d2)}
.tech-item .num{color:var(--br)}
.tech-img{background:var(--iv)}
.tech-photo{border-radius:2px;outline:1px solid var(--hair);outline-offset:10px}

.step{background:var(--d3);border:1px solid var(--hair);border-top:1px solid var(--br2);border-radius:2px}
.step::before{color:var(--br)}
.step p{color:var(--tx2)}

.proof li{border-bottom-color:var(--hair)}
.proof .yr{color:var(--br);font-weight:400;letter-spacing:.04em}
.proof strong{color:var(--iv)}
.proof p{color:var(--tx2)}
.photo figcaption,.gal figcaption{color:var(--tx3)}
.photo img{border-radius:2px}
.section .photo img,.tech-photo img{filter:brightness(.9) saturate(.92)}

.projects{background:var(--hair);border-color:var(--hair);border-radius:2px}
.projects li{background:var(--d3)}
.projects b{color:var(--iv)}
.projects span{color:var(--tx2)}

.facts{background:var(--hair);border-color:var(--hair);border-radius:2px}
.fact{background:var(--d3)}
.fact b{color:var(--br);font-weight:400}
.fact span{color:var(--tx2)}

.gal img{background:var(--d3);border-radius:2px}
.gal figure:hover img{filter:none}
.chips li{background:transparent;border-color:var(--hair-s);color:var(--iv)}
.ph{background:repeating-linear-gradient(135deg,var(--d2) 0 12px,var(--d3) 12px 24px);color:var(--tx2)}

/* Tóm tắt nhanh + khung ghi chú: thẻ tối viền đồng */
.tldr{background:var(--d3);border:1px solid var(--hair);border-left:2px solid var(--br2);border-radius:2px}
.tldr h2{color:var(--br)}
.tldr p{color:#DDD5C8}
.notice{background:var(--d3);border:1px solid var(--hair);border-radius:2px}
.notice h3{color:var(--iv)}
.notice li,.notice p{color:var(--tx)}

/* ---------- "TỜ GIẤY CHÈN" KEM: bảng thông số, hỏi–đáp, form, văn bản dài ---------- */
.spec,.faq,.form,.contact-card,.prose,.cfg-group{
  --paper-shadow:0 0 0 1px rgba(176,141,87,.32),0 34px 70px -28px rgba(0,0,0,.85);
}
/* bảng thông số */
.spec{background:var(--cr-card);border:0;border-radius:2px;box-shadow:var(--paper-shadow);color:var(--ink)}
.spec caption:not(.sr-only){color:var(--brd);background:var(--cr-card);padding:1rem 1rem .75rem;font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase}
.spec th,.spec td{border-bottom-color:var(--cr-line);color:var(--ink)}
.spec td{color:#2B241C}
.spec thead th{background:var(--cr-2);color:var(--brd);font-size:.76rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;border-bottom:1px solid var(--br2)}
.spec tbody th{background:var(--cr);color:var(--ink)}
.spec tbody tr{transition:background .25s}
.spec tbody tr:hover td{background:#F7F1E6}
.spec a{color:var(--brd)}
.spec :focus-visible{outline-color:var(--brd)}
/* hỏi – đáp */
.faq{position:relative;background:var(--cr);color:var(--ink);border-radius:2px;padding:.6rem clamp(1.25rem,3.5vw,2.75rem) .9rem;box-shadow:var(--paper-shadow)}
.faq::before{content:"";position:absolute;inset:8px;border:1px solid rgba(176,141,87,.38);border-radius:1px;pointer-events:none}
.faq details{border-bottom-color:rgba(122,90,46,.22)}
.faq details:last-child{border-bottom:0}
.faq summary{color:var(--ink)}
.faq summary:hover,.faq details[open] summary{color:var(--brd)}
.faq summary::after{color:var(--brd)}
.faq details p{color:var(--mut)}
.faq a{color:var(--brd)}
.faq :focus-visible{outline-color:var(--brd)}
/* form, thẻ liên hệ, văn bản dài, nhóm chọn cấu hình */
.form,.contact-card,.cfg-group{background:var(--cr-card);border:0;border-radius:2px;box-shadow:var(--paper-shadow);color:var(--ink)}
.prose{background:var(--cr);color:var(--ink);border-radius:2px;box-shadow:var(--paper-shadow);padding:clamp(1.5rem,4vw,3.25rem)}
.form h2,.form h3,.contact-card h2,.contact-card h3,.prose h2,.prose h3,.cfg-group legend{color:var(--ink)}
.form p,.form li,.contact-card p,.contact-card li,.prose p,.prose li,.cfg-group p{color:var(--mut)}
.prose strong,.form strong,.contact-card strong{color:var(--ink)}
.form a,.contact-card a,.prose a,.cfg-group a{color:var(--brd)}
.form .btn--primary{background:var(--ink);border-color:var(--ink);color:var(--cr)}
.form .btn--primary:hover{background:var(--brd);border-color:var(--brd);color:var(--cr);box-shadow:none}
.form :focus-visible,.contact-card :focus-visible,.prose :focus-visible,.cfg-group :focus-visible{outline-color:var(--brd)}
.form-note,.field small,.consent p,.ct-list dt{color:var(--mut)}
.ct-list dd{color:var(--ink)}
.cfg-group .src-note,.form .src-note{color:var(--mut)}
/* nhãn [CẦN XÁC NHẬN] trong tờ kem: bản sáng */
.spec mark.todo,.faq mark.todo,.form mark.todo,.contact-card mark.todo,.prose mark.todo,.cfg-group mark.todo{background:#FFF1B8;color:#5A3E00;border-color:rgba(90,62,0,.25)}

/* ---------- Dải CTA ---------- */
.cta-band{background:radial-gradient(70% 120% at 50% 0%,rgba(176,141,87,.16),transparent 70%),var(--d0);border:1px solid var(--hair);border-radius:2px}
.cta-band::before{background:linear-gradient(90deg,transparent,var(--br2),transparent)}
.cta-band p{color:var(--tx)}

/* ---------- Footer ---------- */
.site-footer{background:var(--d0);color:var(--tx2);border-top:0;position:relative}
.site-footer::before{content:"";position:absolute;top:0;left:50%;width:min(1120px,86%);height:1px;transform:translateX(-50%);background:linear-gradient(90deg,transparent,rgba(176,141,87,.5),transparent)}
.site-footer p,.site-footer li{color:var(--tx2)}
.site-footer h2{color:var(--br)}
.site-footer a{color:var(--iv)}
.site-footer a:hover{color:var(--br)}
.legal{border-top-color:var(--hair)}

/* ---------- Thanh liên hệ nhanh + nút Zalo ---------- */
.quickbar{background:var(--hair);border-top:1px solid var(--br2)}
.quickbar a{background:var(--d0);color:var(--iv)}
.quickbar a.primary{background:var(--br2);color:var(--d0)}
.zalo-fab{border-color:var(--br);box-shadow:0 0 0 3px rgba(14,14,14,.6),0 14px 30px rgba(0,0,0,.55)}
.zalo-fab:focus-visible{outline:2px solid var(--br);outline-offset:3px;box-shadow:0 0 0 5px var(--d0)}

/* ---------- Trang video (đã tối): chỉnh về nền sâu ---------- */
.vpage{background:var(--d0)}

/* ---------- Tinh chỉnh sau khi xem ảnh QA ---------- */
@media (max-width:640px){.eyebrow{letter-spacing:.2em;font-size:.7rem}.eyebrow::before{width:28px}}

/* =====================================================================
   MẪU 1E – "TỐI · BÍ ẨN · SANG TRỌNG" (xem thử) – nạp SAU style.css (1C) và style-1d.css
   Chỉ ghi đè chênh lệch so với 1D. Không ảnh nền, không script bên thứ ba.
   Nền   : #0B0B0B hero/CTA/footer · #121212 / #181818 xen kẽ · thẻ #1E1E1E viền rgba(176,141,87,.25)
   Ánh   : vệt sáng đồng (radial-gradient) sau tiêu đề & ảnh cabin – như đèn spotlight trần cabin
   Đồng  : #B08D57 kẻ/số liệu/nút chính (≤ 1 nút vàng mỗi màn hình) · chữ nhỏ #C9A86A
   Kem   : #F5EFE4 CHỈ cho bảng thông số, form, hỏi–đáp, chính sách ("tờ giấy" trên nền tối)
   Tương phản (WCAG 2.2): thân #CFC6B8/#0B0B0B 11,4 · /#1E1E1E 9,7 · phụ #B3AA9C/#1E1E1E 7,2
                          nhãn #C9A86A/#1E1E1E 7,5 · nút #0B0B0B/#B08D57 6,4
   ===================================================================== */
:root{
  --d0:#0B0B0B; --d1:#121212; --d2:#181818; --d3:#1E1E1E;
  --hair:rgba(176,141,87,.25); --hair-s:rgba(176,141,87,.42);
  --spot:rgba(201,168,106,.13); --spot-s:rgba(201,168,106,.20);
}
html,body{background:var(--d0)}

/* ---------- Nhịp nền: #121212 ↔ #181818 xen kẽ, viền chuyển kẻ đồng mờ ---------- */
.section{background:var(--d1)}
.section:nth-of-type(even){background:var(--d2)}
.section--sand,.section--dark{background:var(--d0)}
.section--tight,.section--tight:nth-of-type(even){background:var(--d0)}
.section::before{background:linear-gradient(90deg,transparent,rgba(176,141,87,.30),transparent)}

/* ---------- Spotlight sau tiêu đề khối ---------- */
.section .head,.section .split>div:first-child,.section .interior>div:first-child{position:relative;isolation:isolate}
.section .head::before,.section .split>div:first-child::before,.section .interior>div:first-child::before{
  content:"";position:absolute;z-index:-1;left:-8%;top:-70px;width:min(620px,110%);height:300px;
  background:radial-gradient(50% 50% at 30% 40%,var(--spot),transparent 72%);pointer-events:none}
.section .head h2,.section h2{text-shadow:0 0 38px rgba(201,168,106,.10)}

/* ---------- Câu mở tò mò (do build_1e.py chèn) ---------- */
.tease{margin:0 0 .9rem;color:#C9A86A;font-size:clamp(1rem,.95rem + .35vw,1.18rem);font-style:italic;font-weight:300;letter-spacing:.01em;max-width:46ch}
.tease::after{content:"";display:block;width:56px;height:1px;margin-top:.8rem;background:linear-gradient(90deg,#B08D57,transparent)}

/* ---------- Hero trang chủ: đen tuyệt đối + spotlight trên ảnh cabin ---------- */
.hero{background:radial-gradient(48% 46% at 18% 36%,var(--spot-s),transparent 70%),var(--d0)}
.hero h1{text-shadow:0 0 60px rgba(201,168,106,.16)}
.hero-media{background:var(--d0)}
.hero-media img{filter:brightness(.80) contrast(1.08) saturate(.88)}
.hero-media::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(38% 30% at 50% 14%,rgba(255,228,170,.22),transparent 72%),
             radial-gradient(60% 50% at 50% 46%,rgba(201,168,106,.10),transparent 75%);mix-blend-mode:screen}
.hero-media::after{z-index:2}
.hero-badge{z-index:3}
.hero .fact{background:var(--d0)}
@media (min-width:900px){
  .hero-media::after{background:
    linear-gradient(180deg,rgba(11,11,11,.95) 0,rgba(11,11,11,.8) 80px,rgba(11,11,11,0) 24%),
    linear-gradient(90deg,#0B0B0B 0%,rgba(11,11,11,.7) 18%,rgba(11,11,11,0) 46%),
    linear-gradient(0deg,#0B0B0B 0%,rgba(11,11,11,0) 36%),
    radial-gradient(110% 85% at 60% 40%,rgba(11,11,11,0) 50%,rgba(11,11,11,.7) 100%)}
}

/* ---------- Tiêu đề trang con: ảnh chìm vào bóng tối ---------- */
.page-hero{background:radial-gradient(45% 70% at 80% 30%,var(--spot),transparent 70%),var(--d0)}
.page-hero .photo{outline:0}
.page-hero .photo img{filter:brightness(.84) contrast(1.06) saturate(.9);
  -webkit-mask-image:radial-gradient(75% 75% at 50% 42%,#000 55%,transparent 100%);
          mask-image:radial-gradient(75% 75% at 50% 42%,#000 55%,transparent 100%)}

/* ---------- Thẻ ---------- */
.card,.coll article,.step,.tldr,.notice,.aud{background:var(--d3);border-color:var(--hair)}
.card-media::after{background:linear-gradient(180deg,rgba(11,11,11,.15) 0,rgba(11,11,11,0) 30%,rgba(30,30,30,.4) 62%,#1E1E1E 100%),
  radial-gradient(60% 45% at 50% 18%,rgba(255,228,170,.10),transparent 70%)}
.card-media img{filter:brightness(.70) contrast(1.08) saturate(.82)}
.fact,.projects li{background:var(--d3)}
.tech-item{background:var(--d2)}

/* ---------- Tối đa 1 nút vàng mỗi màn hình ---------- */
/* nút "Nhận tư vấn" trên header → viền đồng (nút vàng dành cho nội dung) */
.site-header .hdr-cta,.site-header .hdr-cta.btn--primary{background:transparent;border-color:var(--br2);color:var(--iv)}
.site-header .hdr-cta:hover{background:rgba(176,141,87,.14);color:var(--iv);box-shadow:none}
/* tab đang chọn (trang chủ – "Bạn là ai"): nền tối, viền + chữ đồng – nút vàng để dành cho nội dung */
.aud-tabs button[aria-selected="true"]{background:var(--d0);border-color:#C9A86A;color:#C9A86A;box-shadow:inset 0 -2px 0 #C9A86A}
.aud-tabs button[aria-selected="true"]:hover{background:var(--d3);color:var(--iv)}
/* nút chính trong khung tab (cách nút hero < 1 màn hình máy tính bảng) → nền tối chữ đồng */
.aud-panel .btn--primary{background:var(--d0);border-color:#C9A86A;color:#C9A86A}
.aud-panel .btn--primary:hover{background:var(--d3);border-color:#C9A86A;color:var(--iv);box-shadow:none}
/* header đặc khi cuộn: đen 1E */
.site-header{background:rgba(11,11,11,.94)}
/* thanh liên hệ nhanh (di động) + nút Zalo: nền tối, chữ/viền đồng */
.quickbar a.primary{background:var(--d0);color:var(--br);box-shadow:inset 0 1px 0 var(--br2)}
.zalo-fab{background:var(--d0);color:var(--br);border:1px solid var(--br2)}
.zalo-fab:hover{background:var(--d3);color:var(--iv)}

/* ---------- Dải CTA & footer: đen tuyệt đối + vệt sáng trên đầu ---------- */
.cta-band{background:radial-gradient(60% 120% at 50% 0%,var(--spot-s),transparent 70%),var(--d0)}
.site-footer{background:var(--d0)}

/* ---------- Tờ giấy kem: bóng sâu hơn trên nền đen tuyệt đối ---------- */
.spec,.faq,.form,.contact-card,.prose,.cfg-group{--paper-shadow:0 0 0 1px rgba(176,141,87,.30),0 40px 80px -30px rgba(0,0,0,.95)}

/* ---------- TỜ KEM: phần tử con giữ kiểu "giấy" (sửa 11/10 sau quét toàn site) ---------- */
/* nút chính trong văn bản kem (chính sách…): nền mực, chữ kem – như nút form */
.prose .btn--primary,.contact-card .btn--primary{background:var(--ink);border-color:var(--ink);color:var(--cr)}
.prose .btn--primary:hover,.contact-card .btn--primary:hover{background:var(--brd);border-color:var(--brd);color:var(--cr);box-shadow:none}
/* hộp ghi chú nằm trong tờ kem (thẻ liên hệ, form, văn bản) */
.contact-card .notice,.prose .notice,.form .notice,.faq .notice,.spec .notice{background:var(--cr-2);border-color:var(--cr-line);color:var(--ink)}
.contact-card .notice :is(p,li,strong,h3),.prose .notice :is(p,li,strong,h3),.form .notice :is(p,li,strong,h3),.faq .notice :is(p,li,strong,h3),.spec .notice :is(p,li,strong,h3){color:var(--ink)}

/* ---------- Hiện dần khi cuộn (lớp html.rv do script inline gắn; không JS / giảm chuyển động = hiện ngay) ---------- */
.rv [data-rv]{opacity:0;transform:translateY(22px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.rv [data-rv].rv-in{opacity:1;transform:none}
.rv [data-rv="2"]{transition-delay:.08s}.rv [data-rv="3"]{transition-delay:.16s}.rv [data-rv="4"]{transition-delay:.24s}
@media (prefers-reduced-motion:reduce){.rv [data-rv]{opacity:1!important;transform:none!important;transition:none!important}}
@media print{.rv [data-rv]{opacity:1!important;transform:none!important}}
/* <<< 1E-SITE-END <<< */