:root {
  --ink: #15171b;
  --ink-2: #1f2228;
  --paper: #f5f2ed;
  --concrete: #e7e2da;
  --line: #d6cfc4;
  --text: #2a2d33;
  --muted: #6c6f76;
  --accent: #c8873a;
  --accent-2: #e0a258;
  /* --serif giữ tên cũ nhưng giờ là font tiêu đề Montserrat */
  --serif: "Montserrat", "Segoe UI", sans-serif;
  --sans: "Inter", "Segoe UI", system-ui, sans-serif;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }
body { background: var(--paper); color: var(--text); font: 400 16px/1.7 var(--sans); overflow-x: hidden; }
body.lock { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
.wrap { width: min(1200px, 100% - 32px); margin-inline: auto; }
section { padding: clamp(72px, 10vw, 140px) 0; position: relative; }

/* ảnh nền có màu dự phòng nếu ảnh chưa tải được */
[data-img] { background: linear-gradient(135deg, #3a3d44, #22252b) center/cover no-repeat; }

/* ---------- chữ ---------- */
.eyebrow { font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--accent-2); font-weight: 600; display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.eyebrow::before { content: ""; width: 32px; height: 1px; background: currentColor; }
.eyebrow.dark { color: var(--accent); }
.title { font-family: var(--serif); font-weight: 700; font-size: clamp(28px, 4.2vw, 50px); line-height: 1.18; color: var(--ink); letter-spacing: -.02em; max-width: 16em; }
/* tiêu đề nhỏ: Montserrat đậm vừa cho rõ ràng */
.shot-meta h3, .card-body h3, .svc h3, .step h4, .faq-list summary, .m-content h2, .m-sub, .m-facts b, .pre-name, .brand b { font-weight: 700 !important; letter-spacing: -.005em; }
.brand b, .pre-name { letter-spacing: .12em; }
.title.light { color: #fff; }
.split .ln { display: block; overflow: hidden; padding-bottom: .06em; }
.split .ln > span { display: inline-block; }
.muted-light { color: #b9b4ac; margin-top: 18px; max-width: 30em; }

/* ---------- nút ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 15px 28px; font-weight: 600; font-size: 15px; letter-spacing: .02em; border-radius: 2px; transition: .35s var(--ease); position: relative; overflow: hidden; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-2); transform: translateY(-2px); box-shadow: 0 12px 30px -10px rgba(200,135,58,.7); }
.btn-ghost { border: 1px solid rgba(255,255,255,.5); color: #fff; }
.btn-ghost:hover { background: #fff; color: var(--ink); }
.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn.wide { width: 100%; }

/* ---------- màn mở đầu ---------- */
.preloader { position: fixed; inset: 0; z-index: 100; background: var(--ink); display: grid; place-content: center; justify-items: center; gap: 10px; color: #fff; }
.pre-logo { width: 110px; fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.pre-name { font-family: var(--serif); font-size: 30px; letter-spacing: .3em; margin-top: 14px; }
.pre-sub { font-size: 12px; letter-spacing: .25em; text-transform: uppercase; color: #8d8a85; }
.no-js .preloader { display: none; }

/* ---------- menu ---------- */
.nav { position: fixed; inset: 0 0 auto; z-index: 50; display: flex; align-items: center; justify-content: space-between; padding: 22px clamp(16px, 4vw, 48px); color: #fff; transition: .4s var(--ease); }
.nav.scrolled { background: rgba(21,23,27,.88); backdrop-filter: blur(12px); padding-block: 12px; }
.nav.hide { transform: translateY(-100%); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand svg { width: 38px; fill: none; stroke: var(--accent); stroke-width: 5; stroke-linecap: round; stroke-linejoin: round; }
.brand b { display: block; font-family: var(--serif); letter-spacing: .18em; font-size: 18px; line-height: 1.1; }
.brand small { font-size: 10.5px; letter-spacing: .2em; text-transform: uppercase; color: #a8a49d; }
.menu { display: flex; align-items: center; gap: 30px; font-size: 14.5px; }
.menu a:not(.btn) { position: relative; opacity: .85; }
.menu a:not(.btn)::after { content: ""; position: absolute; left: 0; bottom: -4px; width: 100%; height: 1px; background: var(--accent); transform: scaleX(0); transform-origin: right; transition: transform .4s var(--ease); }
.menu a:not(.btn):hover { opacity: 1; }
.menu a:not(.btn):hover::after { transform: scaleX(1); transform-origin: left; }
.burger { display: none; width: 40px; height: 40px; position: relative; }
.burger span { position: absolute; left: 8px; right: 8px; height: 2px; background: #fff; transition: .35s var(--ease); }
.burger span:first-child { top: 15px; } .burger span:last-child { top: 23px; }
.nav.open .burger span:first-child { top: 19px; transform: rotate(45deg); }
.nav.open .burger span:last-child { top: 19px; transform: rotate(-45deg); }

/* ---------- hero ---------- */
.hero { height: 100svh; min-height: 620px; padding: 0; display: flex; align-items: flex-end; overflow: hidden; color: #fff; background: var(--ink); }
.hero-bg { position: absolute; inset: -8% 0 0; will-change: transform; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,16,19,.55) 0%, rgba(15,16,19,.15) 40%, rgba(15,16,19,.85) 100%); }
.hero-inner { position: relative; padding-bottom: clamp(80px, 13vh, 140px); }
.hero-title { font-family: var(--serif); font-weight: 800; font-size: clamp(38px, 6.6vw, 88px); line-height: 1.08; letter-spacing: -.03em; margin-bottom: 26px; }
.hero-title .line { display: block; overflow: hidden; padding-bottom: .05em; }
.hero-title .line > span { display: inline-block; }
.hero-title em { color: var(--accent-2); font-style: normal; }
.hero-lead { max-width: 34em; color: #d8d3cb; font-size: clamp(15px, 1.4vw, 18px); margin-bottom: 34px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.scroll-hint { position: absolute; right: clamp(16px, 4vw, 48px); bottom: 40px; width: 26px; height: 42px; border: 1.5px solid rgba(255,255,255,.6); border-radius: 14px; }
.scroll-hint span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; background: #fff; border-radius: 2px; animation: wheel 1.8s infinite; }
@keyframes wheel { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* ---------- số liệu ---------- */
.stats { background: var(--ink); color: #fff; padding: 64px 0; border-top: 1px solid #2b2e35; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 8px 28px; border-left: 1px solid #33363d; }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat b { display: block; font-family: var(--serif); font-weight: 500; font-size: clamp(38px, 4.6vw, 62px); color: var(--accent-2); line-height: 1.1; }
.stat > span { font-size: 14px; color: #a8a49d; letter-spacing: .04em; }

/* ---------- dải lướt ngang ---------- */
.showcase { background: var(--paper); overflow: hidden; padding-bottom: 60px; }
.showcase-head { margin-bottom: 50px; }
.showcase-track { display: flex; gap: 28px; padding-inline: max(16px, (100vw - 1200px) / 2); width: max-content; }
.shot { width: clamp(280px, 38vw, 560px); flex: none; cursor: pointer; }
.shot-img { aspect-ratio: 4/5; overflow: hidden; position: relative; }
.shot-img div { position: absolute; inset: 0; transition: transform 1.2s var(--ease); }
.shot:hover .shot-img div { transform: scale(1.06); }
.shot-meta { display: flex; justify-content: space-between; align-items: baseline; padding-top: 16px; gap: 12px; }
.shot-meta h3 { font-family: var(--serif); font-weight: 500; font-size: 22px; color: var(--ink); }
.shot-meta span { font-size: 13px; color: var(--muted); white-space: nowrap; }
.shot-num { position: absolute; left: 18px; top: 14px; font-family: var(--serif); font-size: 15px; color: #fff; z-index: 2; letter-spacing: .1em; }

/* ---------- lưới công trình ---------- */
.projects { background: var(--concrete); }
.sec-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; margin-bottom: 50px; flex-wrap: wrap; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filters button { padding: 9px 18px; border: 1px solid var(--line); border-radius: 40px; font-size: 14px; transition: .3s; }
.filters button:hover { border-color: var(--ink); }
.filters button.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.card { cursor: pointer; background: var(--paper); transition: box-shadow .5s var(--ease), transform .5s var(--ease); }
.card:hover { box-shadow: 0 30px 60px -30px rgba(0,0,0,.35); transform: translateY(-4px); }
.card.hidden { display: none; }
.card-img { aspect-ratio: 4/3; overflow: hidden; position: relative; }
.card-img div { position: absolute; inset: 0; transition: transform 1s var(--ease); }
.card:hover .card-img div { transform: scale(1.07); }
.card-img::after { content: "Xem chi tiết →"; position: absolute; inset: auto 0 0; padding: 40px 20px 16px; color: #fff; font-size: 14px; font-weight: 500; background: linear-gradient(transparent, rgba(0,0,0,.65)); opacity: 0; transform: translateY(10px); transition: .45s var(--ease); }
.card:hover .card-img::after { opacity: 1; transform: none; }
.tag { position: absolute; left: 14px; top: 14px; z-index: 2; background: var(--accent); color: #fff; font-size: 11.5px; font-weight: 600; padding: 4px 10px; letter-spacing: .06em; text-transform: uppercase; }
.card-body { padding: 20px 22px 24px; }
.card-body h3 { font-family: var(--serif); font-weight: 500; font-size: 21px; color: var(--ink); margin-bottom: 6px; }
.card-body p { font-size: 13.5px; color: var(--muted); display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- bản đồ ---------- */
.mapsec { background: var(--ink); color: #fff; }
.map-wrap { display: grid; grid-template-columns: 1fr 1.3fr; gap: 60px; align-items: center; }
.map { height: 460px; border: 1px solid #33363d; filter: grayscale(.4) contrast(1.05); }
.leaflet-container { background: #2a2d33; font-family: var(--sans); }
.pin { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); border: 3px solid #fff; box-shadow: 0 0 0 6px rgba(200,135,58,.35); }
.leaflet-popup-content { margin: 12px 14px; font-size: 13px; }
.leaflet-popup-content b { font-size: 14px; display: block; }
.leaflet-popup-content a { color: var(--accent); font-weight: 600; cursor: pointer; }

/* ---------- dịch vụ ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 50px; }
.svc { background: var(--paper); padding: 40px 30px; transition: background .5s var(--ease); }
.svc svg { width: 46px; height: 46px; fill: none; stroke: var(--accent); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 26px; transition: transform .5s var(--ease); }
.svc h3 { font-family: var(--serif); font-weight: 500; font-size: 22px; color: var(--ink); margin-bottom: 10px; }
.svc p { font-size: 14.5px; color: var(--muted); }
.svc:hover { background: #fff; }
.svc:hover svg { transform: translateY(-6px); }

/* ---------- quy trình ---------- */
.process { background: var(--concrete); }
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 24px; margin-top: 60px; position: relative; }
.steps-line { position: absolute; left: 0; right: 0; top: 26px; height: 1px; background: var(--line); }
.steps-line span { position: absolute; inset: 0; background: var(--accent); transform-origin: left; }
.step { position: relative; }
.step i { font-style: normal; display: grid; place-items: center; width: 54px; height: 54px; border-radius: 50%; background: var(--paper); border: 1px solid var(--accent); color: var(--accent); font-family: var(--serif); font-size: 18px; margin-bottom: 22px; position: relative; }
.step h4 { font-family: var(--serif); font-weight: 500; font-size: 20px; color: var(--ink); margin-bottom: 6px; }
.step p { font-size: 14px; color: var(--muted); }

/* ---------- tính chi phí ---------- */
.calc { background: var(--ink-2); color: #fff; }
.calc-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.calc-box { background: var(--paper); color: var(--text); padding: clamp(24px, 4vw, 44px); display: grid; gap: 22px; box-shadow: 0 40px 80px -40px rgba(0,0,0,.6); }
.calc-box label, .cform label { display: grid; gap: 8px; font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
input, select, textarea { font: 400 16px var(--sans); color: var(--text); padding: 13px 14px; border: 1px solid var(--line); background: #fff; border-radius: 2px; width: 100%; transition: border-color .3s; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
.seg { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); }
.seg button { padding: 12px; font-size: 16px; font-weight: 600; color: var(--text); background: #fff; border-left: 1px solid var(--line); transition: .3s; }
.seg button:first-child { border-left: 0; }
.seg button.on { background: var(--ink); color: #fff; }
.calc-out { border-top: 1px solid var(--line); padding-top: 20px; display: grid; gap: 2px; }
.calc-out span { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 600; }
.calc-out b { font-family: var(--serif); font-weight: 500; font-size: clamp(34px, 4vw, 46px); color: var(--accent); line-height: 1.2; }
.calc-out small { font-size: 13px; color: var(--muted); }

/* ---------- về chúng tôi ---------- */
.about-wrap { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(40px, 7vw, 100px); align-items: center; }
.about-img { aspect-ratio: 4/5; position: relative; }
.about-badge { position: absolute; right: -24px; bottom: 40px; background: var(--accent); color: #fff; padding: 22px 26px; font-size: 13px; line-height: 1.4; text-transform: uppercase; letter-spacing: .08em; }
.about-badge b { display: block; font-family: var(--serif); font-size: 44px; font-weight: 500; letter-spacing: 0; line-height: 1; margin-bottom: 4px; }
.about-text > p { margin-top: 18px; color: #4a4d53; }
.about-text .title { margin-bottom: 8px; }
.about-text blockquote { margin-top: 34px; padding-left: 24px; border-left: 2px solid var(--accent); font-family: var(--serif); font-weight: 600; font-size: 20px; line-height: 1.5; color: var(--ink); }
.about-text cite { display: block; margin-top: 10px; font: 600 13px var(--sans); font-style: normal; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }

/* ---------- nhận xét ---------- */
.testi { background: var(--concrete); }
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 50px; }
.tcard { background: var(--paper); padding: 34px 30px; display: flex; flex-direction: column; gap: 18px; }
.stars { color: #f2b01e; letter-spacing: 4px; font-size: 22px; line-height: 1; }
.tcard blockquote { font-size: 17px; line-height: 1.55; color: var(--ink); flex: 1; }
.tcard figcaption { font-size: 13.5px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; }
.tcard figcaption b { display: block; color: var(--ink); font-size: 15px; }

/* ---------- FAQ ---------- */
.faq-wrap { display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { list-style: none; cursor: pointer; padding: 24px 40px 24px 0; font-family: var(--serif); font-size: 20px; color: var(--ink); position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font: 300 28px var(--sans); color: var(--accent); transition: transform .4s var(--ease); }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list details p { padding: 0 40px 24px 0; color: #4a4d53; }

/* ---------- liên hệ ---------- */
.contact { background: var(--ink); color: #fff; }
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.cinfo { list-style: none; margin-top: 40px; display: grid; gap: 22px; }
.cinfo li { display: grid; font-size: 18px; }
.cinfo span { font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: #8d8a85; }
.cinfo a { font-family: var(--serif); font-size: 30px; color: var(--accent-2); }
.cform { background: var(--paper); color: var(--text); padding: clamp(24px, 4vw, 44px); display: grid; gap: 18px; }
.form-ok { color: #2e7d4f; font-weight: 600; text-align: center; }
.form-err { color: #b3402a; font-weight: 600; text-align: center; }
.form-err a { text-decoration: underline; }

.foot { background: #0f1013; color: #8d8a85; font-size: 13.5px; padding: 26px 0 90px; }
.foot-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.foot b { color: #fff; letter-spacing: .14em; }

/* ---------- nút nổi ---------- */
/* đặt cao hơn nhãn "Powered by Netlify" ở góc dưới phải để không bị che */
.float { position: fixed; right: 18px; bottom: calc(76px + env(safe-area-inset-bottom)); z-index: 40; display: grid; gap: 12px; }
.fl { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; box-shadow: 0 10px 25px -8px rgba(0,0,0,.45); transition: transform .3s var(--ease); }
.fl:hover { transform: scale(1.08); }
.zalo { background: #0068ff; color: #fff; font-weight: 700; font-size: 13px; }
.call { background: var(--accent); position: relative; }
.call::before { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 2px solid var(--accent); animation: ring 2s infinite; }
.call svg { width: 24px; fill: #fff; }
@keyframes ring { 0% { transform: scale(1); opacity: .8; } 100% { transform: scale(1.6); opacity: 0; } }

/* ---------- cửa sổ chi tiết ---------- */
.modal { position: fixed; inset: 0; z-index: 90; background: rgba(10,11,13,.82); backdrop-filter: blur(6px); display: grid; place-items: center; padding: 16px; opacity: 0; visibility: hidden; transition: .4s var(--ease); }
.modal.open { opacity: 1; visibility: visible; }
.modal-box { background: var(--paper); width: min(1100px, 100%); max-height: calc(100svh - 32px); overflow-y: auto; position: relative; transform: translateY(30px) scale(.98); transition: transform .5s var(--ease); overscroll-behavior: contain; -webkit-overflow-scrolling: touch; touch-action: pan-y; }
.modal.open .modal-box { transform: none; }
.modal-close { position: sticky; top: 0; float: right; z-index: 5; width: 50px; height: 50px; font-size: 30px; background: var(--ink); color: #fff; }
.m-hero { aspect-ratio: 16/8; }
.m-content { padding: clamp(24px, 4vw, 48px); }
.m-content h2 { font-family: var(--serif); font-weight: 500; font-size: clamp(28px, 4vw, 42px); color: var(--ink); line-height: 1.15; }
.m-content > p { color: #4a4d53; margin-top: 14px; max-width: 46em; }
.m-facts { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); margin: 28px 0; }
.m-facts div { padding: 16px 0; }
.m-facts span { display: block; font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.m-facts b { font-family: var(--serif); font-weight: 500; font-size: 19px; color: var(--ink); }
.m-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-top: 12px; }
.m-gallery div { aspect-ratio: 4/3; }
.m-sub { font-family: var(--serif); font-size: 22px; color: var(--ink); margin: 34px 0 14px; font-weight: 500; }

/* so sánh trước / sau */
.ba { position: relative; aspect-ratio: 16/9; overflow: hidden; user-select: none; touch-action: pan-y; }
.ba > div { position: absolute; inset: 0; }
.ba .ba-before { clip-path: inset(0 50% 0 0); filter: saturate(.6); }
.ba .ba-handle { position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; background: #fff; transform: translateX(-1px); pointer-events: none; }
.ba .ba-handle::after { content: "‹ ›"; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 46px; height: 46px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-size: 18px; font-weight: 700; letter-spacing: 4px; }
.ba input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: ew-resize; margin: 0; padding: 0; }
.ba-label { position: absolute; bottom: 14px; z-index: 2; background: rgba(0,0,0,.6); color: #fff; font-size: 12px; padding: 4px 10px; letter-spacing: .1em; text-transform: uppercase; pointer-events: none; }
.ba-label.l { left: 14px; } .ba-label.r { right: 14px; }

/* ---------- chống rớt chữ: chia dòng đều, không để 1 chữ lẻ loi ---------- */
h1, h2, h3, h4, .title, .split .ln > span, summary, blockquote, .eyebrow, .btn { text-wrap: balance; }
p, li, figcaption { text-wrap: pretty; }
/* chừa chỗ cho dấu tiếng Việt (ấ, ữ...) không bị cắt khi chữ trượt lên */
.hero-title .line, .split .ln { padding-top: .12em; margin-top: -.12em; }

/* ---------- điện thoại / máy tính bảng ---------- */
@media (max-width: 1000px) {
  .grid, .testi-grid { grid-template-columns: repeat(2, 1fr); }
  .svc-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); row-gap: 44px; }
  .steps-line { display: none; }
  .map-wrap, .calc-wrap, .about-wrap, .faq-wrap, .contact-wrap { grid-template-columns: 1fr; gap: 44px; }
  .about-badge { right: 16px; }
}
/* menu thu gọn sớm để chữ menu không bị xuống dòng trên laptop nhỏ */
@media (max-width: 1100px) {
  .burger { display: block; }
  .menu { display: none; }
}

/* ---------- menu điện thoại ---------- */
.mnav { display: none; }
@media (max-width: 1100px) {
  .mnav { position: fixed; inset: 0; z-index: 70; display: flex; flex-direction: column; overflow-y: auto;
    padding: 18px 20px calc(24px + env(safe-area-inset-bottom)); color: #fff;
    background:
      linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 32px 32px,
      linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 32px 32px,
      radial-gradient(120% 60% at 100% 0%, rgba(200,135,58,.18), transparent 60%),
      var(--ink);
    opacity: 0; visibility: hidden; transition: opacity .4s var(--ease), visibility .4s; }
  .mnav.open { opacity: 1; visibility: visible; }
  .mnav-top { display: flex; align-items: center; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid #2b2e35; }
  .mnav-top .brand small { display: block; }
  .mnav-close { width: 44px; height: 44px; border: 1px solid #3a3d44; border-radius: 50%; position: relative; }
  .mnav-close span { position: absolute; left: 13px; right: 13px; top: 21px; height: 1.5px; background: #fff; transform: rotate(45deg); }
  .mnav-close span + span { transform: rotate(-45deg); }
  .mnav-links { display: flex; flex-direction: column; margin: 18px 0 28px; }
  .mnav-links a { display: flex; align-items: center; gap: 16px; padding: 17px 0; border-bottom: 1px solid #23262c;
    font: 600 23px/1.2 var(--serif); letter-spacing: -.01em;
    opacity: 0; transform: translateY(18px); transition: opacity .5s var(--ease), transform .5s var(--ease), color .3s; }
  .mnav-links i { font: 600 11px var(--sans); font-style: normal; color: var(--accent-2); letter-spacing: .1em; width: 22px; }
  .mnav-links em { margin-left: auto; font-style: normal; font-weight: 400; color: #5d6068; transition: transform .3s var(--ease), color .3s; }
  .mnav-links a:active, .mnav-links a:hover { color: var(--accent-2); }
  .mnav-links a:hover em { color: var(--accent-2); transform: translateX(4px); }
  .mnav.open .mnav-links a { opacity: 1; transform: none; }
  .mnav.open .mnav-links a:nth-child(1) { transition-delay: .05s; }
  .mnav.open .mnav-links a:nth-child(2) { transition-delay: .1s; }
  .mnav.open .mnav-links a:nth-child(3) { transition-delay: .15s; }
  .mnav.open .mnav-links a:nth-child(4) { transition-delay: .2s; }
  .mnav.open .mnav-links a:nth-child(5) { transition-delay: .25s; }
  .mnav.open .mnav-links a:nth-child(6) { transition-delay: .3s; }
  .mnav-foot { margin-top: auto; display: grid; gap: 10px; opacity: 0; transform: translateY(18px); transition: .5s var(--ease) .35s; }
  .mnav.open .mnav-foot { opacity: 1; transform: none; }
  .btn-zalo { background: #0068ff; color: #fff; }
  .mnav-foot p { text-align: center; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: #8d8a85; margin-top: 10px; }
}
@media (max-width: 860px) {
  .showcase-track { overflow-x: auto; width: auto; scroll-snap-type: x mandatory; padding-bottom: 10px; scrollbar-width: none; }
  .showcase-track::-webkit-scrollbar { display: none; }
  .shot { scroll-snap-align: center; width: 78vw; }
}
@media (max-width: 640px) {
  .stats-grid { grid-template-columns: 1fr 1fr; row-gap: 30px; }
  .stat:nth-child(3) { border-left: 0; padding-left: 0; }
  .stat { padding: 4px 16px; }
  .grid, .testi-grid, .svc-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .map { height: 340px; }
  .m-facts { grid-template-columns: 1fr 1fr; }
  .m-hero { aspect-ratio: 4/3; }
  .cinfo a { font-size: 26px; }
  .brand small { display: none; }

  /* chữ trên điện thoại: mỗi dòng slogan nằm gọn 1 hàng, cỡ theo bề ngang màn hình */
  .hero-title { font-size: 7.6vw; letter-spacing: -.035em; }
  .hero-title .line { white-space: nowrap; }
  .hero-lead { font-size: 15px; }
  .hero-cta .btn { flex: 1 1 0; padding-inline: 12px; font-size: 14px; }
  .eyebrow { font-size: 10.5px; letter-spacing: .14em; gap: 8px; }
  .eyebrow::before { width: 18px; }
  .title { font-size: clamp(24px, 6.8vw, 30px); line-height: 1.25; }
  .stat b { font-size: 34px; }
  .stat > span { font-size: 13px; }
  .shot-meta { flex-direction: column; gap: 2px; }
  .shot-meta h3, .card-body h3, .svc h3 { font-size: 18px; }
  .step h4 { font-size: 17px; }
  .step p { font-size: 13.5px; }
  .faq-list summary { font-size: 16.5px; padding-right: 34px; }
  .about-text blockquote { font-size: 17px; }
  .m-facts b { font-size: 16px; }
  .calc-out b { font-size: 32px; }
  .tcard blockquote { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}