@font-face{font-family:Geist;src:url(geist-vietnamese.woff2) format("woff2");font-weight:100 900;font-display:swap;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:Geist;src:url(geist-latin-ext.woff2) format("woff2");font-weight:100 900;font-display:swap;unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:Geist;src:url(geist-latin.woff2) format("woff2");font-weight:100 900;font-display:swap;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}

:root{
  /* Màu: xanh logo XD + navy của app Xinding + thang xám thép */
  --brand:#017ec7;--brand-hi:#2b9be0;--brand-lo:#0567a3;
  --navy:#0c3b64;--ink:#06121f;--ink-2:#0b1d30;
  --steel-50:#f3f6f9;--steel-100:#e6ecf2;--steel-200:#d3dce6;--steel-400:#8d9cad;--steel-600:#4d5e70;
  --text:#102033;--muted:#566779;--on-dark:#f2f6fa;--on-dark-2:#9fb3c8;
  --font:Geist,"PingFang SC","Microsoft YaHei","Noto Sans SC",Inter,Arial,sans-serif;
  --wrap:1240px;--gutter:24px;--hd:76px;
  --r-sm:10px;--r:16px;--r-lg:24px;
  --sh:0 1px 2px rgba(6,18,31,.06),0 8px 28px rgba(6,18,31,.08);
  --sh-hi:0 2px 4px rgba(6,18,31,.06),0 22px 48px rgba(6,18,31,.16);
  --ease:cubic-bezier(.22,.61,.36,1);--ease-out:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--hd);-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--text);background:#fff;line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--brand-hi);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}

/* Nút */
.btn{display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 26px;border-radius:999px;font-weight:600;font-size:15px;border:1px solid transparent;transition:background .2s,border-color .2s,transform .2s var(--ease),box-shadow .2s;white-space:nowrap}
.btn-sm{height:42px;padding:0 20px;font-size:14px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 24px rgba(1,126,199,.35)}
.btn-primary:hover{background:var(--brand-lo);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#fff;backdrop-filter:blur(6px);background:rgba(255,255,255,.06)}
.btn-ghost:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}
.arr{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .25s var(--ease)}
.btn:hover .arr{transform:translateX(4px)}

/* Thanh tiến độ cuộn trang */
.progress{position:fixed;inset:0 0 auto;height:3px;z-index:60;pointer-events:none}
.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand-hi));transform-origin:0 50%;transform:scaleX(var(--p,0))}

/* Thanh menu: trong suốt trên ảnh đầu trang, cuộn xuống thì nền trắng */
.hd{position:fixed;inset:0 0 auto;z-index:50;color:#fff;transition:background .3s,box-shadow .3s,color .3s}
.hd-bar{display:flex;align-items:center;gap:28px;height:var(--hd)}
.hd.is-stuck{background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);color:var(--text);box-shadow:0 1px 0 var(--steel-100),0 8px 24px rgba(6,18,31,.06)}
.brand{display:flex;align-items:center;gap:12px;margin-right:auto}
.brand img{width:72px;height:auto}
.brand b{display:block;font-size:18px;letter-spacing:.08em;line-height:1.1}
.brand small{display:block;font-size:11.5px;opacity:.75;letter-spacing:.12em}
.nav{display:flex;gap:4px}
.nav a{position:relative;padding:8px 14px;font-size:15px;font-weight:500;opacity:.88;transition:opacity .2s}
.nav a::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;background:currentColor;transform:scaleX(0);transform-origin:0 50%;transition:transform .3s var(--ease)}
.nav a:hover{opacity:1}.nav a:hover::after,.nav a.is-on::after{transform:scaleX(1)}
.hd.is-stuck .nav a.is-on{color:var(--brand)}
.lang{display:flex;padding:3px;border-radius:999px;border:1px solid rgba(255,255,255,.3)}
.hd.is-stuck .lang{border-color:var(--steel-200)}
.lang button{height:30px;padding:0 12px;border-radius:999px;font-size:13px;font-weight:600;opacity:.8}
.lang button[aria-pressed="true"]{background:var(--brand);color:#fff;opacity:1}
.burger{display:none;width:44px;height:44px;position:relative}
.burger i{position:absolute;left:11px;right:11px;height:2px;background:currentColor;border-radius:2px;transition:transform .3s var(--ease)}
.burger i:first-child{top:17px}.burger i:last-child{top:25px}
.burger[aria-expanded="true"] i:first-child{transform:translateY(4px) rotate(45deg)}
.burger[aria-expanded="true"] i:last-child{transform:translateY(-4px) rotate(-45deg)}
/* Menu điện thoại: nằm ngoài header để không bị backdrop-filter cắt */
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(78vw,320px);z-index:45;background:#fff;padding:calc(var(--hd) + 16px) 28px 28px;transform:translateX(100%);transition:transform .4s var(--ease-out);box-shadow:-20px 0 60px rgba(6,18,31,.18)}
.drawer nav{display:flex;flex-direction:column}
.drawer a{padding:16px 0;font-size:20px;font-weight:600;border-bottom:1px solid var(--steel-100)}
.scrim{position:fixed;inset:0;z-index:44;background:rgba(6,18,31,.45);opacity:0;pointer-events:none;transition:opacity .35s}
body.menu-open .drawer{transform:none}
body.menu-open .scrim{opacity:1;pointer-events:auto}
body.menu-open .hd{color:var(--text);background:#fff}

/* Đầu trang */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;flex-direction:column;justify-content:center;color:#fff;background:var(--ink);overflow:hidden;isolation:isolate}
.hero-media,.slide,.hero-shade,.hero-grid,.hero-light{position:absolute;inset:0}
.hero-media{z-index:-4}
.slide{opacity:0;transition:opacity 1.4s ease}
.slide.is-on{opacity:1}
.slide img{width:100%;height:100%;object-fit:cover;object-position:70% 50%;transform:scale(1.08);transition:transform 7s linear}
.slide.is-on img{transform:scale(1)}
.hero-shade{z-index:-3;background:linear-gradient(90deg,rgba(6,18,31,.94) 0%,rgba(6,18,31,.78) 38%,rgba(6,18,31,.25) 75%,rgba(6,18,31,.1) 100%),linear-gradient(0deg,rgba(6,18,31,.7),transparent 35%)}
.hero-grid{z-index:-2;background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:64px 64px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 25% 50%,#000 10%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 25% 50%,#000 10%,transparent 75%)}
.hero-light{z-index:-1;opacity:0;transition:opacity .6s;background:radial-gradient(520px circle at var(--mx,30%) var(--my,50%),rgba(43,155,224,.22),transparent 60%)}
.hero:hover .hero-light{opacity:1}
.hero-in{position:relative;padding-top:calc(var(--hd) + 40px);padding-bottom:120px;width:100%}
.chip{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);font-size:13.5px;font-weight:500;letter-spacing:.04em;backdrop-filter:blur(6px)}
.chip i{width:8px;height:8px;border-radius:50%;background:#41d18b;box-shadow:0 0 0 0 rgba(65,209,139,.6);animation:pulse 2.2s infinite}
.chip .sep{opacity:.5}
@keyframes pulse{70%{box-shadow:0 0 0 10px rgba(65,209,139,0)}100%{box-shadow:0 0 0 0 rgba(65,209,139,0)}}
.hero-t{margin:28px 0 24px;font-size:clamp(2.5rem,5.4vw,4.9rem);line-height:1.04;font-weight:700;letter-spacing:-.035em;max-width:14ch}
.ln{display:block;overflow:hidden;padding-bottom:.16em;margin-bottom:-.1em}
.ln>span{display:inline-block}
.grad{background:linear-gradient(90deg,#7cc8f5,#2b9be0 40%,#c8e6fa 60%,#2b9be0);background-size:220% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:sheen 7s ease-in-out infinite}
@keyframes sheen{50%{background-position:100% 0}}
.hero-lead{max-width:540px;font-size:clamp(1rem,1.4vw,1.15rem);color:#c9d6e3;line-height:1.7}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero-foot{position:absolute;left:0;right:0;bottom:36px;display:flex;align-items:center;justify-content:space-between}
.dots{display:flex;gap:10px}
.dots i{width:44px;height:3px;border-radius:3px;background:rgba(255,255,255,.22);overflow:hidden}
.dots b{display:block;height:100%;background:#fff;transform:scaleX(0);transform-origin:0 50%}
.dots i.is-on b{animation:fill 6s linear forwards}
@keyframes fill{to{transform:scaleX(1)}}
.cue{display:flex;align-items:center;gap:12px;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:#c9d6e3}
.cue i{position:relative;width:1px;height:44px;background:rgba(255,255,255,.2);overflow:hidden}
.cue i::after{content:"";position:absolute;left:0;top:-50%;width:1px;height:50%;background:#fff;animation:drop 2s var(--ease) infinite}
@keyframes drop{to{top:100%}}

/* Hiệu ứng vào trang của đầu trang */
.js .hero .chip,.js .hero-lead,.js .hero-cta,.js .hero-foot{opacity:0;transform:translateY(18px);transition:opacity .9s var(--ease-out),transform .9s var(--ease-out)}
.js .ln>span{transform:translateY(115%);opacity:0;transition:transform 1.1s var(--ease-out),opacity .6s ease}
.ready .hero .chip,.ready .hero-lead,.ready .hero-cta,.ready .hero-foot{opacity:1;transform:none}
.ready .ln>span{transform:none;opacity:1}
.ready .ln:nth-child(2)>span{transition-delay:.1s}
.ready .ln:nth-child(3)>span{transition-delay:.2s}
.ready .hero-lead{transition-delay:.35s}.ready .hero-cta{transition-delay:.48s}.ready .hero-foot{transition-delay:.7s}

/* Dải chữ chạy */
.marquee{background:var(--ink-2);color:#fff;overflow:hidden;padding:26px 0;border-top:1px solid rgba(255,255,255,.06);-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.mq-track{display:flex;width:max-content;animation:mq 40s linear infinite}
.marquee:hover .mq-track{animation-play-state:paused}
.mq-track span{display:flex;align-items:center;gap:14px;padding:0 34px;font-size:clamp(1.3rem,2.4vw,2rem);font-weight:600;letter-spacing:-.01em;white-space:nowrap}
.mq-track span::after{content:"";width:10px;height:10px;margin-left:34px;transform:rotate(45deg);border:2px solid var(--brand-hi)}
.mq-track em{font-style:normal;color:var(--on-dark-2);font-weight:500}
@keyframes mq{to{transform:translateX(-50%)}}

/* Khối chung */
.sec{padding:clamp(80px,11vw,140px) 0}
.sec-head{max-width:720px;margin-bottom:clamp(40px,5vw,64px)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--brand)}
.eyebrow::before{content:"";width:28px;height:2px;background:currentColor;border-radius:2px}
.h2{margin:16px 0 18px;font-size:clamp(2rem,4.2vw,3.4rem);line-height:1.1;letter-spacing:-.03em;font-weight:700;color:var(--ink)}
.lead{font-size:clamp(1rem,1.3vw,1.125rem);color:var(--muted);max-width:620px}

/* Hiện dần khi cuộn tới (chỉ ẩn khi JS chạy được) */
.js .rv{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease-out),transform .8s var(--ease-out);transition-delay:var(--d,0s)}
.js .rv.in{opacity:1;transform:none}
/* Đã hiện xong: bỏ độ trễ để hiệu ứng rê chuột phản hồi ngay */
.js .rv.done{transition-delay:0s}
.js .card.done{transition:transform .45s var(--ease-out),box-shadow .45s var(--ease-out)}

/* Giới thiệu + số liệu */
.about-in{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(40px,6vw,96px);align-items:end}
.stats{display:grid;gap:0}
.stat{display:grid;grid-template-columns:150px 1fr;align-items:baseline;gap:20px;padding:22px 0;border-bottom:1px solid var(--steel-100);position:relative}
.stat::after{content:"";position:absolute;left:0;bottom:-1px;height:1px;width:100%;background:var(--brand);transform:scaleX(0);transform-origin:0 50%;transition:transform 1.2s var(--ease-out) calc(var(--d,0s) + .3s)}
.stat.in::after{transform:scaleX(1)}
.stat b{font-size:clamp(2.6rem,4.6vw,3.6rem);font-weight:700;letter-spacing:-.04em;line-height:1;color:var(--ink);font-variant-numeric:tabular-nums}
.stat>span{color:var(--muted);font-size:15.5px}

/* Sản phẩm */
.products{background:var(--steel-50)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{position:relative;background:#fff;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh);transition:transform .45s var(--ease-out),box-shadow .45s var(--ease-out),opacity .8s var(--ease-out);isolation:isolate}
.card::before{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;border-radius:inherit;opacity:0;transition:opacity .3s;background:radial-gradient(360px circle at var(--mx,50%) var(--my,0%),rgba(1,126,199,.12),transparent 60%);box-shadow:inset 0 0 0 1px rgba(1,126,199,.25)}
.card-img{aspect-ratio:4/3;overflow:hidden;background:#e9edf1}
.card-img img{width:100%;height:100%;object-fit:cover;transform:scale(1.02);transition:transform .9s var(--ease-out)}
.card-body{position:relative;padding:22px 26px 28px}
.no{position:absolute;right:24px;top:20px;font-size:13px;font-weight:600;color:var(--steel-400);font-variant-numeric:tabular-nums}
.card h3{font-size:21px;letter-spacing:-.015em;color:var(--ink);padding-right:36px}
.card h3 em{font-style:normal;font-weight:500;font-size:15px;color:var(--steel-400);margin-left:4px;white-space:nowrap}
html[lang="zh-CN"] .card h3 em{display:none}
.card p{margin-top:8px;color:var(--muted);font-size:15px}
.apps{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:40px}
.apps>span{font-size:14px;font-weight:600;color:var(--muted);margin-right:6px}
.apps b{font-weight:500;font-size:14.5px;padding:9px 16px;border-radius:999px;background:#fff;border:1px solid var(--steel-200);transition:border-color .2s,color .2s}
.apps b:hover{border-color:var(--brand);color:var(--brand)}

/* Sản xuất: ảnh dính bên trái, các bước bên phải */
/* overflow:clip (không phải hidden) để ảnh dính position:sticky vẫn hoạt động */
.process{background:var(--ink);color:var(--on-dark);position:relative;overflow:clip}
.process::before{content:"";position:absolute;inset:0;background:radial-gradient(800px 500px at 85% 0%,rgba(1,126,199,.18),transparent 60%);pointer-events:none}
.process .h2{color:#fff}
.ps{position:relative;display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(40px,6vw,96px)}
.ps-media{position:relative}
.ps-frame{position:sticky;top:calc(var(--hd) + 32px);aspect-ratio:4/3.4;border-radius:var(--r-lg);overflow:hidden;background:var(--ink-2);box-shadow:0 30px 80px rgba(0,0,0,.4)}
.ps-img{position:absolute;inset:0;opacity:0;transform:scale(1.06);transition:opacity .8s ease,transform 1.4s var(--ease-out)}
.ps-img.is-on{opacity:1;transform:none}
.ps-img img{width:100%;height:100%;object-fit:cover}
.ps-measure svg{position:absolute;inset:0;width:100%;height:100%;fill:none;stroke:#ffb020;stroke-width:.5;vector-effect:non-scaling-stroke}
.ps-measure path{stroke-width:2;vector-effect:non-scaling-stroke;stroke-dasharray:400;stroke-dashoffset:400;transition:stroke-dashoffset 1.4s var(--ease-out) .4s}
.ps-measure.is-on path{stroke-dashoffset:0}
.ps-measure.is-on path:nth-child(2){transition-delay:.7s}.ps-measure.is-on path:nth-child(3){transition-delay:1s}
.ps-count{position:absolute;left:20px;bottom:18px;z-index:2;padding:6px 14px;border-radius:999px;background:rgba(6,18,31,.6);backdrop-filter:blur(8px);font-size:13px;color:var(--on-dark-2);font-variant-numeric:tabular-nums}
.ps-count b{color:#fff}
.ps-steps{list-style:none;position:relative;padding-left:40px}
.ps-steps::before,.ps-steps::after{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;border-radius:2px;background:rgba(255,255,255,.1)}
.ps-steps::after{background:linear-gradient(var(--brand-hi),var(--brand));transform-origin:50% 0;transform:scaleY(var(--fill,0))}
.step{position:relative;min-height:62vh;padding:8px 0 48px;opacity:.32;transition:opacity .5s ease}
.step:last-child{min-height:40vh}
.step.is-on{opacity:1}
.step::before{content:"";position:absolute;left:-40px;top:10px;width:16px;height:16px;border-radius:50%;background:var(--ink);border:2px solid rgba(255,255,255,.25);transition:border-color .4s,background .4s,box-shadow .4s;z-index:1}
.step.is-on::before{border-color:var(--brand-hi);background:var(--brand-hi);box-shadow:0 0 0 6px rgba(43,155,224,.18)}
.step-img{display:none}
.step-no{font-size:14px;font-weight:600;color:var(--brand-hi);letter-spacing:.1em}
.step h3{margin:6px 0 12px;font-size:clamp(1.6rem,2.6vw,2.2rem);letter-spacing:-.025em;color:#fff}
.step p{color:var(--on-dark-2);font-size:17px;max-width:420px}

/* Hai mô hình: rê chuột bên nào, bên đó mở rộng */
.split{display:flex;gap:20px;min-height:420px}
.pane{position:relative;flex:1;display:flex;flex-direction:column;justify-content:flex-end;padding:clamp(28px,3.5vw,48px);border-radius:var(--r-lg);overflow:hidden;color:#fff;isolation:isolate;transition:flex-grow .7s var(--ease-out)}
.pane::before{content:"";position:absolute;inset:0;z-index:-2;transition:transform 1.2s var(--ease-out)}
.pane::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(0deg,rgba(6,18,31,.92) 10%,rgba(6,18,31,.35) 70%,rgba(6,18,31,.15))}
.pane-a::before{background:url(img/xuong.webp) center/cover}
.pane-b::before{background:url(img/hero.webp) 70% center/cover}
.split:hover .pane{flex-grow:.8}
.split .pane:hover{flex-grow:1.35}
.pane:hover::before{transform:scale(1.05)}
.pane-no{position:absolute;top:clamp(24px,3vw,40px);left:clamp(28px,3.5vw,48px);font-size:clamp(3.5rem,7vw,6rem);font-weight:700;line-height:1;letter-spacing:-.05em;color:transparent;-webkit-text-stroke:1.5px rgba(255,255,255,.45)}
.pane h3{font-size:clamp(1.7rem,3vw,2.4rem);letter-spacing:-.025em}
.pane p{margin-top:10px;color:#d3dfeb;max-width:440px}
.pane-tag{align-self:flex-start;margin-top:22px;padding:7px 14px;border-radius:999px;border:1px solid rgba(255,255,255,.3);font-size:13px;backdrop-filter:blur(6px)}

/* Liên hệ */
.contact{background:linear-gradient(180deg,var(--steel-50),#fff)}
.contact-in{display:grid;grid-template-columns:1fr 1.05fr;gap:clamp(40px,6vw,80px);align-items:start}
.reach{display:grid;gap:12px;margin:28px 0 36px}
.reach-i{display:flex;align-items:center;gap:16px;padding:16px 20px;border-radius:var(--r);background:#fff;border:1px solid var(--steel-100);box-shadow:var(--sh);transition:transform .3s var(--ease-out),border-color .3s,box-shadow .3s}
.reach-i:hover{transform:translateY(-3px);border-color:rgba(1,126,199,.4);box-shadow:var(--sh-hi)}
.ic{flex:none;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:rgba(1,126,199,.1);color:var(--brand)}
.ic svg,.fab svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linejoin:round;stroke-linecap:round}
.reach-i small{display:block;font-size:13px;color:var(--muted)}
.reach-i b{font-size:18px;color:var(--ink);word-break:break-all}
.info{display:grid;grid-template-columns:150px 1fr;gap:12px 20px;font-size:15px}
.info dt{color:var(--muted)}
.info dd{font-weight:500;color:var(--ink)}
.place{display:grid;gap:16px}
.place-img{border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/9;box-shadow:var(--sh)}
.place-img img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease-out)}
.place-img:hover img{transform:scale(1.04)}
.map{position:relative;border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/8;background:var(--steel-100);box-shadow:var(--sh)}
.map iframe{width:100%;height:100%;border:0;display:block}
.map-go{position:absolute;right:14px;top:14px}

/* Chân trang */
.ft{background:var(--ink);color:var(--on-dark-2);padding:48px 0;font-size:14px}
.ft-in{display:flex;flex-wrap:wrap;align-items:center;gap:24px 40px}
.ft-brand{display:flex;align-items:center;gap:14px;margin-right:auto}
.ft-brand img{width:64px}
.ft-brand b{color:#fff;letter-spacing:.08em}
.ft-nav{display:flex;gap:22px}
.ft-nav a:hover{color:#fff}
.ft-copy{width:100%;padding-top:24px;border-top:1px solid rgba(255,255,255,.08)}

/* Nút gọi nổi */
.fab{position:fixed;right:22px;bottom:22px;z-index:40;width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:var(--brand);color:#fff;box-shadow:0 12px 30px rgba(1,126,199,.45);transition:transform .3s var(--ease-out),opacity .4s;opacity:0;transform:scale(.6);pointer-events:none}
.fab.show{opacity:1;transform:none;pointer-events:auto}
.fab:hover{transform:scale(1.08)}
.fab::before{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid var(--brand);animation:ring 2.4s var(--ease) infinite}
@keyframes ring{from{transform:scale(1);opacity:.7}to{transform:scale(1.6);opacity:0}}

/* Rê chuột chỉ áp dụng cho thiết bị có chuột */
@media (hover:hover){
  .card:hover{transform:translateY(-8px);box-shadow:var(--sh-hi)}
  .card:hover::before{opacity:1}
  .card:hover .card-img img{transform:scale(1.08)}
}

/* Máy tính bảng */
@media (max-width:1024px){
  .nav,.hd-cta{display:none}
  .burger{display:block}
  .hd-bar{gap:12px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .about-in,.contact-in{grid-template-columns:1fr}
  .ps{grid-template-columns:1fr}
  .ps-media{display:none}
  .ps-steps{padding-left:32px}
  .ps-steps::before,.ps-steps::after{left:5px}
  .step{min-height:0;opacity:1;padding-bottom:56px}
  .step::before{left:-32px}
  .step-img{display:block;width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:var(--r);margin-bottom:22px}
}
/* Điện thoại */
@media (max-width:640px){
  :root{--gutter:16px;--hd:64px}
  .brand small{display:none}
  .brand img{width:58px}
  .lang button{padding:0 10px}
  .hero-t{max-width:none;font-size:2.3rem}
  .hero-shade{background:linear-gradient(180deg,rgba(6,18,31,.6),rgba(6,18,31,.82) 45%,rgba(6,18,31,.92))}
  .hero-in{padding-bottom:110px}
  .btn{height:48px;padding:0 22px}
  .hero-cta .btn{flex:1;justify-content:center}
  .cards{grid-template-columns:1fr}
  .stat{grid-template-columns:110px 1fr}
  .split{flex-direction:column;min-height:0}
  .pane{min-height:300px}
  .split:hover .pane,.split .pane:hover{flex-grow:1}
  .info{grid-template-columns:1fr;gap:2px}
  .info dd{margin-bottom:12px}
  .map{aspect-ratio:4/3}
  .ft-nav{flex-wrap:wrap;gap:12px 20px}
  .cue{display:none}
}

/* Người dùng bật giảm chuyển động: tắt hết hiệu ứng, nội dung hiện ngay */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;transition-delay:0s!important}
  .js .rv,.js .hero .chip,.js .hero-lead,.js .hero-cta,.js .hero-foot{opacity:1;transform:none}
  .js .ln>span{transform:none}
  .mq-track{animation:none}
  .slide img{transform:none}
}