/* TRANG CHỦ BẢN 3D (08/11/2026) — chỉ nạp ở trang chủ (khung.php, nhánh $la_trang_chu).
   Thay hoàn toàn pal-home.css + Bootstrap ở trang chủ. Các trang khác vẫn dùng pal-site.css (sáng).
   Lý do nền tối: docs/quyet-dinh/0014-trang-chu-3d-nen-toi.md. Chi tiết: docs/tinh-nang/trang-chu-3d.md.

   Tương phản đã đo (công thức W3C) trên nền --nen #060D1F:
     --chu #EEF4FF 17.6:1 · --chu-2 #B6C4DA 11.0:1 · --chu-3 #8A9BB6 6.9:1 · --cyan #2BADE3 7.3:1
   Nút chính: chữ trắng trên #1670C0 5.2:1 và #5B3FE0 6.1:1 (hai đầu dải gradient). */
:root{
  --nen:#060D1F; --nen-2:#0A1530; --nen-3:#0E1C3D;
  --mat:rgba(255,255,255,.045); --mat-2:rgba(255,255,255,.08);
  --vien:rgba(150,185,255,.14); --vien-2:rgba(150,185,255,.26);
  --chu:#EEF4FF; --chu-2:#B6C4DA; --chu-3:#8A9BB6;
  --cyan:#2BADE3; --cyan-sang:#5EF0FF; --xanh:#1965AF; --cham:#6C7BFF; --tim:#B07CF5; --hong:#E25DB3; --vang:#F5A524;
  --grad-chu:linear-gradient(100deg,#5EF0FF 0%,#2BADE3 30%,#7C8BFF 65%,#C38BFF 100%);
  --grad-nut:linear-gradient(120deg,#1670C0 0%,#3550D8 55%,#5B3FE0 100%);
  --bo-lon:28px; --bo-nho:16px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --muc-dem:112px;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body.pal-home{margin:0;background:var(--nen);color:var(--chu);font-family:var(--font);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
/* Nền toàn trang: 2 vầng màu cố định + lưới mờ — tạo chiều sâu cho các mục bên dưới hero. */
body.pal-home::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(60vw 50vh at 85% 10%,rgba(43,173,227,.10),transparent 70%),
    radial-gradient(50vw 50vh at 5% 70%,rgba(123,92,245,.10),transparent 70%),
    linear-gradient(var(--nen),var(--nen))}
.pal-home img{max-width:100%}
.pal-home a{color:inherit;text-decoration:none}
.pal-home h1,.pal-home h2,.pal-home h3,.pal-home p{margin:0}
.pal-home ::selection{background:rgba(43,173,227,.45);color:#fff}
.pal-home :focus-visible{outline:2px solid var(--cyan-sang);outline-offset:3px;border-radius:10px}
main{display:block}
.pal-home section[id]{scroll-margin-top:80px}

/* ── Nút ── */
.nut{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:0 24px;border-radius:999px;
  font:600 15.5px/1 var(--font);letter-spacing:-.005em;cursor:pointer;border:0;white-space:nowrap;
  transition:transform .35s cubic-bezier(.2,.9,.3,1.2),box-shadow .35s ease,background-color .3s ease,border-color .3s ease}
.nut svg{flex:none;transition:transform .3s ease}
.nut:hover svg{transform:translateX(3px)}
a.nut--chinh,.nut--chinh{background:var(--grad-nut);color:#fff;
  box-shadow:0 10px 30px -8px rgba(53,80,216,.7),inset 0 1px 0 rgba(255,255,255,.25)}
.nut--chinh:hover{transform:translateY(-2px);box-shadow:0 16px 40px -8px rgba(53,120,230,.85),inset 0 1px 0 rgba(255,255,255,.3)}
a.nut--kinh,.nut--kinh{background:rgba(255,255,255,.06);color:var(--chu);border:1px solid var(--vien-2)}
.nut--kinh:hover{background:rgba(255,255,255,.12);border-color:rgba(150,200,255,.45);transform:translateY(-2px)}
.nut--nho{min-height:44px;padding:0 18px;font-size:14.5px}
.nut--rong{width:100%}

/* Nhãn mục có chấm "đang sống" */
.nhan-ai{display:inline-flex;align-items:center;gap:10px;padding:7px 14px;border-radius:999px;font-size:13px;font-weight:650;
  letter-spacing:.02em;color:var(--cyan-sang);background:rgba(43,173,227,.08);border:1px solid rgba(43,173,227,.25)}
.cham-song{position:relative;width:7px;height:7px;border-radius:50%;background:currentColor;flex:none}
.cham-song::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:1px solid currentColor;animation:p3-xung 2.4s ease-out infinite}
@keyframes p3-xung{from{transform:scale(.6);opacity:.9}to{transform:scale(2.2);opacity:0}}

/* ── Nav ── */
.pal-nav{position:fixed;top:14px;left:50%;transform:translateX(-50%);z-index:100;width:min(1240px,calc(100% - 24px));
  display:flex;align-items:center;justify-content:space-between;gap:16px;padding:9px 10px 9px 20px;border-radius:999px;
  background:rgba(8,16,38,.55);border:1px solid var(--vien);
  -webkit-backdrop-filter:blur(22px) saturate(160%);backdrop-filter:blur(22px) saturate(160%);
  transition:background-color .3s ease,box-shadow .3s ease}
.pal-nav.da-cuon{background:rgba(6,13,31,.82);box-shadow:0 12px 40px -12px rgba(0,0,0,.6)}
/* Logo PAL nền trong, chữ navy — đặt lên chip trắng nhỏ để đọc được trên nền tối. */
.pal-nav__logo{display:flex;align-items:center;background:#fff;border-radius:999px;padding:6px 12px}
.pal-nav__logo img{height:24px;width:auto;display:block}
.pal-nav__links{display:flex;gap:4px}
.pal-nav__links a{padding:9px 14px;border-radius:999px;font-size:14.5px;font-weight:550;color:var(--chu-2);transition:color .25s,background-color .25s}
.pal-nav__links a:hover,.pal-nav__links a.dang-o{color:#fff;background:rgba(255,255,255,.07)}
.pal-nav__phai{display:flex;align-items:center;gap:10px}
.pal-nav__ngonngu{display:flex;padding:3px;border-radius:999px;background:rgba(255,255,255,.06)}
.pal-nav__ngonngu a{padding:6px 10px;border-radius:999px;font-size:12.5px;font-weight:700;color:var(--chu-3)}
.pal-nav__ngonngu a.dang-chon{background:rgba(255,255,255,.14);color:#fff}
a.pal-nav__cta{display:inline-flex;align-items:center;min-height:42px;padding:0 18px;border-radius:999px;background:var(--grad-nut);
  color:#fff;font-size:14.5px;font-weight:650;box-shadow:0 6px 20px -6px rgba(53,80,216,.8);transition:transform .3s ease}
a.pal-nav__cta:hover{transform:translateY(-1px)}
@media (max-width:980px){.pal-nav__links{display:none}}
@media (max-width:420px){.pal-nav{padding-left:12px}.pal-nav__logo{padding:5px 9px}.pal-nav__logo img{height:20px}
  a.pal-nav__cta{padding:0 14px;font-size:13.5px}.pal-nav__ngonngu a{padding:6px 8px}}

/* ── Hero + sân khấu 3D ── */
/* overflow:clip (KHÔNG phải hidden): hidden vẫn là vùng CUỘN được bằng lập trình — Tab tới một nút
   trong sân khấu 3D làm trình duyệt scrollIntoView, cuộn NGANG cả hero lệch sang trái (đo thật
   08/11/2026). clip cắt y hệt nhưng không cuộn được. Khai hidden trước cho trình duyệt cũ. */
.h3{position:relative;padding:118px 20px 56px;min-height:100svh;display:flex;align-items:center;overflow:hidden;overflow:clip;isolation:isolate}
.h3__nen{position:absolute;inset:0;z-index:-1;pointer-events:none}
.h3__nen span{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;animation:p3-troi 22s ease-in-out infinite alternate}
.h3__nen span:nth-child(1){width:46vw;height:46vw;left:-12vw;top:-14vw;background:#1965AF}
.h3__nen span:nth-child(2){width:38vw;height:38vw;right:-8vw;top:8vh;background:#4B2FB8;animation-delay:-7s}
.h3__nen span:nth-child(3){width:30vw;height:30vw;left:35vw;bottom:-16vw;background:#0E8FBF;opacity:.35;animation-delay:-13s}
/* Mặt sàn lưới phối cảnh dưới hero — "sàn sân khấu" 3D bằng CSS thuần. */
.h3__nen::after{content:"";position:absolute;left:-25%;right:-25%;bottom:-8%;height:46%;
  background-image:linear-gradient(rgba(94,240,255,.16) 1px,transparent 1px),linear-gradient(90deg,rgba(94,240,255,.16) 1px,transparent 1px);
  background-size:64px 64px;transform:perspective(600px) rotateX(62deg);transform-origin:50% 100%;
  -webkit-mask-image:linear-gradient(to top,#000 0%,transparent 80%);mask-image:linear-gradient(to top,#000 0%,transparent 80%);
  animation:p3-san 6s linear infinite}
@keyframes p3-troi{to{transform:translate3d(6vw,4vh,0) scale(1.12)}}
@keyframes p3-san{to{background-position:0 64px}}
.h3__bo{width:100%;max-width:1360px;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);gap:36px;align-items:center}
.h3__chu{display:flex;flex-direction:column;align-items:flex-start;gap:22px}
.h3__tieu-de{font-size:clamp(2.2rem,3.55vw,3.7rem);text-wrap:balance;font-weight:760;line-height:1.06;letter-spacing:-.038em}
/* TỐC ĐỘ: tiêu đề + đoạn mô tả là ứng viên LCP — KHÔNG được bắt đầu từ opacity:0 (Chrome chỉ tính
   LCP khi phần tử đã hiện; đo thật: LCP 3,4s dù chữ đã có trong HTML từ 1,1s). Chỉ trượt nhẹ. */
.h3__md{display:block;animation:p3-len .9s cubic-bezier(.2,.8,.2,1) both}
.h3__md--1{animation-delay:.12s}
.h3__md--2{animation-delay:.24s;background:var(--grad-chu);-webkit-background-clip:text;background-clip:text;color:transparent;
  background-size:200% 100%;animation:p3-len .9s cubic-bezier(.2,.8,.2,1) .12s both,p3-chay-mau 8s ease-in-out 1.3s infinite alternate}
@keyframes p3-vao{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
@keyframes p3-len{from{transform:translateY(18px)}to{transform:none}}
@keyframes p3-chay-mau{to{background-position:100% 0}}
.h3__sub{font-size:clamp(1rem,1.25vw,1.15rem);color:var(--chu-2);max-width:560px;animation:p3-len .9s .18s both}
.h3__nut{display:flex;flex-wrap:wrap;gap:12px;animation:p3-vao 1s .46s both}
/* Desktop: sân khấu 3D nằm ngay cạnh nên nút "Xoay thử" thừa — chỉ hiện khi sân khấu xếp xuống dưới. */
@media (min-width:1101px){.nut--xoay{display:none}}
.h3__diem{list-style:none;margin:6px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--chu-2);animation:p3-vao 1s .56s both}
.h3__diem li{display:flex;align-items:center;gap:7px}
.h3__diem svg{color:var(--cyan-sang)}

.s3-khung{min-width:0;display:flex;flex-direction:column;gap:12px;animation:p3-vao 1.1s .2s both}
.s3{position:relative;height:clamp(470px,70vh,700px);border-radius:var(--bo-lon);overflow:hidden;overflow:clip;touch-action:pan-y;
  background:radial-gradient(70% 60% at 50% 45%,rgba(43,173,227,.16),transparent 70%),linear-gradient(180deg,rgba(14,28,61,.65),rgba(6,13,31,.4));
  border:1px solid var(--vien);box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 40px 120px -40px rgba(30,90,200,.45)}
.s3__canvas{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:grab}
.s3.dang-keo .s3__canvas{cursor:grabbing}
.s3__nhan-lop{position:absolute;inset:0;pointer-events:none}
.s3-nut{position:absolute;left:0;top:0;pointer-events:auto;font-family:var(--font);color:var(--chu);will-change:transform}
.s3-nut--sp{display:flex;align-items:center;gap:8px;padding:5px 12px 5px 5px;border-radius:999px;cursor:pointer;
  background:rgba(8,16,38,.72);border:1px solid color-mix(in srgb,var(--a) 55%,transparent);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-size:13.5px;
  box-shadow:0 6px 18px -6px rgba(0,0,0,.6);transition:border-color .25s,background-color .25s,box-shadow .25s}
.s3-nut--sp b{font-weight:650;white-space:nowrap}
.s3-nut--sp small{display:none}
.s3-nut__logo{width:28px;height:28px;border-radius:50%;background:#fff;display:grid;place-items:center;overflow:hidden;flex:none}
.s3-nut__logo img{width:22px;height:22px;object-fit:contain}
.s3-nut--sp:hover,.s3-nut--sp.dang-chon{background:color-mix(in srgb,var(--a) 30%,rgba(8,16,38,.85));box-shadow:0 0 0 1px var(--a),0 8px 28px -6px var(--a)}
.s3-nut--ai{padding:6px 12px;border-radius:999px;border:1px solid rgba(94,240,255,.5);background:rgba(6,30,50,.75);cursor:pointer;
  font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--cyan-sang)}
.s3-nut--ai b{font-weight:700}
.s3-nut--nho{font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:999px;background:rgba(8,16,38,.6);color:var(--chu-2);
  border:1px solid color-mix(in srgb,var(--a) 45%,transparent);white-space:nowrap}
.s3-nut--doi_tac{color:#FFD58A}
.s3-nut.mo{opacity:.25}
/* Trạng thái 3D đã chạy: nút được JS đặt bằng transform; ẩn nút ở mặt sau (JS gắn .sau). */
.s3--3d .s3-nut{transition:opacity .3s ease}
.s3--3d .s3-nut.sau{opacity:.35}
.s3--3d .s3-nut--nho.sau{opacity:.5}
/* Chờ module 3D tải: giấu nút để khỏi nháy bố cục tĩnh rồi nhảy sang 3D. */
.co-js .s3--cho .s3__nhan-lop,.co-js .s3--cho .s3__dieu-khien{visibility:hidden}
.co-js .s3--cho::after{content:"";position:absolute;left:50%;top:50%;width:120px;height:120px;margin:-60px;border-radius:50%;
  background:radial-gradient(circle,rgba(94,240,255,.55),rgba(43,173,227,.1) 55%,transparent 70%);animation:p3-tho 1.6s ease-in-out infinite alternate}
@keyframes p3-tho{to{transform:scale(1.25);opacity:.6}}
/* KHÔNG có 3D (tắt JS / không WebGL / máy yếu): lưới nút tĩnh, vẫn đủ thông tin. */
.s3:not(.s3--3d):not(.s3--cho){height:auto;padding:28px 20px 64px}
.s3:not(.s3--3d) .s3__canvas,.s3:not(.s3--3d) .s3__dieu-khien{display:none}
.s3:not(.s3--3d) .s3__nhan-lop{position:static;display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.s3:not(.s3--3d) .s3-nut{position:static;transform:none!important}
.s3:not(.s3--3d) .s3-nut--sp{flex:1 1 260px;flex-direction:row;align-items:center;border-radius:18px;padding:10px 14px 10px 10px}
.s3:not(.s3--3d) .s3-nut--sp small{display:block;color:var(--chu-3);font-size:12.5px;margin-left:auto;text-align:right}
.s3:not(.s3--3d) .s3-nut--ai{order:-1;flex-basis:100%;text-align:center}
.s3:not(.s3--3d) .s3-nut--nho{align-self:center}
.co-js .s3:not(.s3--3d) .s3__goi-y{display:none}
.s3__dieu-khien{position:absolute;top:14px;right:14px;display:flex;flex-direction:column;gap:6px}
.s3__dieu-khien button{width:44px;height:44px;border-radius:14px;border:1px solid var(--vien);background:rgba(8,16,38,.6);color:var(--chu);
  display:grid;place-items:center;cursor:pointer;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:background-color .2s}
.s3__dieu-khien button:hover{background:rgba(255,255,255,.12)}
.s3__goi-y{position:absolute;left:16px;bottom:14px;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--chu-3);
  padding:6px 12px;border-radius:999px;background:rgba(6,13,31,.55);pointer-events:none;max-width:calc(100% - 32px)}
.s3-panel{position:absolute;right:14px;bottom:14px;width:min(350px,calc(100% - 28px));z-index:3;padding:18px;border-radius:22px;
  background:rgba(8,16,38,.86);border:1px solid color-mix(in srgb,var(--a,#2BADE3) 50%,transparent);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:0 20px 60px -20px rgba(0,0,0,.7),0 0 40px -18px var(--a,#2BADE3);
  animation:p3-panel .35s cubic-bezier(.2,.9,.3,1.1) both}
.s3-panel[hidden]{display:none}
@keyframes p3-panel{from{opacity:0;transform:translateY(14px) scale(.97)}}
.s3-panel__dong{position:absolute;top:10px;right:10px;width:36px;height:36px;border-radius:12px;border:0;background:rgba(255,255,255,.07);
  color:var(--chu);display:grid;place-items:center;cursor:pointer}
.s3-panel__dau{display:flex;align-items:center;gap:12px;padding-right:40px}
.s3-panel__logo{width:46px;height:46px;border-radius:14px;background:#fff;display:grid;place-items:center;flex:none}
.s3-panel__logo img{width:34px;height:34px;object-fit:contain}
.s3-panel__logo:has(img[src=""]){display:none}
.s3-panel__ten{display:block;font-size:18px;letter-spacing:-.01em}
.s3-panel__tag{display:block;font-size:13px;color:var(--a,var(--cyan));font-weight:600;line-height:1.35}
.s3-panel__mota{font-size:13.5px;color:var(--chu-2);margin-top:10px;line-height:1.55}
.s3-panel__nhan{font-size:11.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--chu-3);margin-top:12px}
.s3-panel__ket-noi{list-style:none;margin:6px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.s3-panel__ket-noi li{font-size:12px;padding:3px 9px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid var(--vien)}
.s3-panel__nut{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.s3-panel__nut[hidden]{display:none}
.s3-luong{display:flex;flex-wrap:wrap;gap:8px}
.s3-luong__nut{display:inline-flex;align-items:center;gap:7px;min-height:38px;padding:0 14px;border-radius:999px;cursor:pointer;
  font:600 13px/1 var(--font);color:var(--chu-2);background:rgba(255,255,255,.04);border:1px solid var(--vien);transition:all .25s ease}
.s3-luong__nut i{width:9px;height:9px;border-radius:50%;background:var(--a);box-shadow:0 0 10px var(--a)}
.s3-luong__nut:hover{color:#fff;border-color:var(--vien-2)}
.s3-luong__nut.dang-chon{color:#fff;background:color-mix(in srgb,var(--a,#2BADE3) 22%,transparent);border-color:var(--a,var(--cyan))}
.s3-luong__mo-ta{font-size:14px;color:var(--chu-2);min-height:2.6em}
@media (max-width:1100px){
  .h3{min-height:0;padding-top:112px}
  .h3__bo{grid-template-columns:1fr;gap:40px}
  .h3__chu{align-items:center;text-align:center}
  .h3__sub{margin:0 auto}.h3__nut,.h3__diem{justify-content:center}
}
@media (max-width:640px){
  .h3{padding:100px 14px 40px}
  .s3{height:min(560px,76svh);border-radius:22px}
  /* Màn hẹp: nhãn sản phẩm chỉ còn logo (tên hiện khi chọn), nhãn chữ kênh/đối tác ẩn — cầu 3D vẫn còn. */
  .s3--3d .s3-nut--sp{padding:4px}
  .s3--3d .s3-nut--sp b{display:none}
  .s3--3d .s3-nut--sp.dang-chon{padding-right:12px}
  .s3--3d .s3-nut--sp.dang-chon b{display:inline}
  .s3--3d .s3-nut--nho{display:none}
  .s3__goi-y{font-size:11.5px;left:10px;bottom:10px}
  .s3-panel{left:10px;right:10px;bottom:10px;width:auto;padding:14px}
  /* Bảng gọn để còn thấy khối được chọn phía trên (JS dời cảnh lên khi bảng mở ở khung hẹp). */
  .s3-panel__logo{width:38px;height:38px;border-radius:12px}.s3-panel__logo img{width:28px;height:28px}
  .s3-panel__mota{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;font-size:13px;margin-top:8px}
  .s3-panel__nhan{margin-top:8px}
  .s3-panel__ket-noi li{font-size:11.5px;padding:2px 8px}
  .s3-panel__nut{flex-wrap:nowrap;margin-top:10px}
  .s3-panel__nut .nut{flex:1 1 auto;min-width:0;padding:0 12px;font-size:13.5px}
  .s3-panel__thu{flex:0 0 auto!important}
  .s3__dieu-khien{top:10px;right:10px}
  .h3__nut{width:100%}.h3__nut .nut{flex:1 1 100%}
  .s3-luong{flex-wrap:nowrap;overflow-x:auto;margin:0 -14px;padding:0 14px 4px;scrollbar-width:none}
  .s3-luong::-webkit-scrollbar{display:none}
  .s3-luong__nut{flex:none}
}

/* ── Mục chung ── */
.muc{max-width:1240px;margin:0 auto;padding:var(--muc-dem) 20px 0}
.muc__dau{max-width:860px;margin:0 auto 52px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:18px}
.muc__tieu-de{font-size:clamp(1.9rem,3.6vw,3.1rem);font-weight:740;line-height:1.12;letter-spacing:-.03em}
.muc__mo-ta{font-size:clamp(1rem,1.3vw,1.14rem);color:var(--chu-2);max-width:700px}
.co-js .hien-dan{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.8,.2,1),transform .8s cubic-bezier(.2,.8,.2,1)}
.co-js .hien-dan.hien{opacity:1;transform:none}

/* ── Dải tin cậy ── */
.tin{max-width:1240px;margin:0 auto;padding:64px 20px 0;text-align:center}
.tin__so-chinh{font-size:clamp(1.25rem,2.2vw,1.7rem);font-weight:650;letter-spacing:-.015em}
.tin__luoi{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
.tin__o{padding:26px 16px;border-radius:var(--bo-lon);background:var(--mat);border:1px solid var(--vien)}
.tin__so{font-size:clamp(2.4rem,4.5vw,3.6rem);font-weight:780;letter-spacing:-.04em;line-height:1;font-variant-numeric:tabular-nums;
  background:var(--grad-chu);-webkit-background-clip:text;background-clip:text;color:transparent}
.tin__nhan{margin-top:10px;color:var(--chu-2);font-size:15px}
.tin__doi-tac-nhan{margin-top:52px;font-size:13px;text-transform:uppercase;letter-spacing:.1em;color:var(--chu-3)}
.tin__chay{display:flex;overflow:hidden;overflow:clip;margin-top:20px;-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.tin__day{list-style:none;margin:0;padding:0;display:flex;gap:16px;padding-right:16px;flex:none;animation:p3-chay 38s linear infinite}
.tin__chay:hover .tin__day{animation-play-state:paused}
.tin__day li{width:150px;height:64px;flex:none;border-radius:16px;background:rgba(255,255,255,.92);display:grid;place-items:center;padding:12px 18px}
.tin__day img{max-height:34px;max-width:100%;width:auto;object-fit:contain;filter:saturate(.9)}
@keyframes p3-chay{to{transform:translateX(-100%)}}
@media (max-width:640px){.tin__luoi{grid-template-columns:1fr;gap:12px}.tin__day li{width:124px;height:56px}}

/* ── AI-first ── */
.ai3__luoi{display:grid;grid-template-columns:1fr minmax(300px,1fr) 1fr;gap:22px;align-items:center}
.ai3__cot{padding:28px;border-radius:var(--bo-lon);background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));border:1px solid var(--vien)}
.ai3__cot h3{font-size:20px;letter-spacing:-.015em}
.ai3__phu{color:var(--chu-3);font-size:14px;margin-top:4px}
.ai3__cot ol{list-style:none;margin:20px 0 0;padding:0;display:flex;flex-direction:column;gap:16px;position:relative}
.ai3__cot li{display:flex;gap:14px;position:relative}
.ai3__cot li b{font-size:15.5px}
.ai3__cot li p{font-size:14px;color:var(--chu-2);line-height:1.5}
.ai3__so{flex:none;width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font-size:13px;font-weight:750;
  color:#fff;background:linear-gradient(140deg,rgba(94,240,255,.28),rgba(108,123,255,.28));border:1px solid rgba(94,240,255,.35)}
.ai3__cot--1 .ai3__so{background:linear-gradient(140deg,rgba(226,93,179,.28),rgba(176,124,245,.3));border-color:rgba(226,93,179,.4)}
/* Khối tầng 3D — CSS thuần, preserve-3d. JS (pal-trang-chu.js) chỉ đặt --tx/--ty theo con trỏ. */
.tang3{height:440px;display:grid;place-items:center;perspective:1300px;outline:none;animation:p3-noi 7s ease-in-out infinite alternate}
@keyframes p3-noi{to{transform:translateY(-14px)}}
.tang3__khoi{position:relative;width:250px;height:250px;transform-style:preserve-3d;
  transform:rotateX(calc(58deg + var(--ty,0deg))) rotateZ(calc(-42deg + var(--tx,0deg)));transition:transform .5s ease-out}
.tang3__lop{position:absolute;inset:0;border-radius:30px;padding:20px;display:flex;flex-direction:column;justify-content:flex-end;gap:4px;
  border:1.5px solid var(--c);background:linear-gradient(135deg,color-mix(in srgb,var(--c) 34%,transparent),color-mix(in srgb,var(--c) 8%,rgba(6,13,31,.6)));
  box-shadow:0 0 40px -6px color-mix(in srgb,var(--c) 70%,transparent),inset 0 0 30px -10px var(--c);
  transform:translateZ(var(--z));transition:transform .7s cubic-bezier(.2,.9,.3,1.15)}
.tang3__lop b{font-size:17px;letter-spacing:-.01em}
.tang3__lop span{font-size:11.5px;color:var(--chu-2);line-height:1.35}
.tang3__lop::before{content:"";position:absolute;inset:14px;border-radius:20px;
  background-image:radial-gradient(color-mix(in srgb,var(--c) 70%,white) 1px,transparent 1.5px);background-size:18px 18px;opacity:.35}
.tang3__lop--0{--c:#5EF0FF;--z:150px}
.tang3__lop--1{--c:#9B7CFF;--z:75px}
.tang3__lop--2{--c:#2F7BEA;--z:0px}
.tang3:hover .tang3__lop--0,.tang3:focus-visible .tang3__lop--0{--z:210px}
.tang3:hover .tang3__lop--1,.tang3:focus-visible .tang3__lop--1{--z:105px}
/* Hạt dữ liệu bay lên xuyên qua 3 tầng. */
.tang3__tia,.tang3__tia::before,.tang3__tia::after{position:absolute;left:50%;top:50%;width:10px;height:10px;margin:-5px;border-radius:50%;
  background:#fff;box-shadow:0 0 14px 4px var(--cyan-sang);animation:p3-bay 2.8s linear infinite}
.tang3__tia::before,.tang3__tia::after{content:"";left:auto;top:auto;margin:0;inset:auto}
.tang3__tia::before{left:-70px;top:50px;animation-delay:-.9s}
.tang3__tia::after{left:60px;top:-60px;animation-delay:-1.8s}
@keyframes p3-bay{from{transform:translateZ(0);opacity:0}15%{opacity:1}85%{opacity:1}to{transform:translateZ(240px);opacity:0}}
@media (max-width:1060px){
  .ai3__luoi{grid-template-columns:1fr 1fr}
  .tang3{grid-column:1/-1;order:-1;height:360px}
}
@media (max-width:700px){.ai3__luoi{grid-template-columns:1fr}.ai3__cot{padding:22px}.tang3{height:330px}.tang3__khoi{width:200px;height:200px}}

/* ── Sản phẩm: thẻ 3D nghiêng theo con trỏ, các lớp nổi ở độ sâu khác nhau ── */
.sp3__luoi{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.the3{perspective:1100px;scroll-margin-top:100px}
/* KHÔNG overflow:hidden ở đây: overflow khác visible ép transform-style về flat → mất độ sâu translateZ của các lớp con. */
.the3__than{position:relative;height:100%;padding:30px;border-radius:var(--bo-lon);transform-style:preserve-3d;
  transform:rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transition:transform .5s cubic-bezier(.2,.9,.3,1),border-color .3s,box-shadow .4s;
  background:linear-gradient(155deg,color-mix(in srgb,var(--a) 14%,rgba(255,255,255,.05)),rgba(255,255,255,.02) 55%);
  border:1px solid color-mix(in srgb,var(--a) 28%,transparent);display:flex;flex-direction:column;gap:10px}
.the3:hover .the3__than,.the3.dang-chon .the3__than{border-color:color-mix(in srgb,var(--a) 70%,transparent);
  box-shadow:0 30px 80px -30px color-mix(in srgb,var(--a) 70%,transparent)}
.the3.dang-chon .the3__than{animation:p3-nhay 1.2s ease 2}
@keyframes p3-nhay{50%{box-shadow:0 0 0 3px var(--a),0 30px 80px -20px var(--a)}}
.the3__sang{position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:.0;transition:opacity .4s;
  background:radial-gradient(420px circle at var(--mx,70%) var(--my,0%),color-mix(in srgb,var(--a) 40%,transparent),transparent 60%)}
.the3:hover .the3__sang{opacity:1}
.the3__nen{position:absolute;right:14px;top:14px;width:170px;height:170px;opacity:.13;filter:brightness(2.2) saturate(.8);pointer-events:none;
  transform:translateZ(-30px)}
.the3__dau{display:flex;align-items:center;justify-content:space-between;transform:translateZ(60px)}
.the3__logo{height:58px;min-width:58px;padding:10px 14px;border-radius:18px;background:#fff;display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 14px 30px -10px color-mix(in srgb,var(--a) 80%,transparent)}
.the3__logo img{height:36px;width:auto;max-width:130px;object-fit:contain}
.the3__ai{display:inline-flex;align-items:center;gap:7px;font-size:11.5px;font-weight:800;letter-spacing:.06em;color:var(--a);
  padding:5px 10px;border-radius:999px;border:1px solid color-mix(in srgb,var(--a) 50%,transparent);background:rgba(6,13,31,.5)}
.the3__ten{font-size:clamp(1.6rem,2.4vw,2.1rem);font-weight:760;letter-spacing:-.03em;margin-top:12px;transform:translateZ(40px)}
.the3__tag{font-size:16.5px;font-weight:600;color:var(--a);transform:translateZ(30px);filter:brightness(1.25)}
.the3__mo-ta{color:var(--chu-2);font-size:15px;transform:translateZ(20px);flex:1}
.the3__nut{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px;transform:translateZ(36px)}
@media (max-width:760px){.sp3__luoi{grid-template-columns:1fr}.the3__than{padding:24px}}

/* ── Quy trình ── */
.qt3__ray{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;position:relative}
.qt3__ray::before{content:"";position:absolute;left:8%;right:8%;top:31px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--cyan) 20%,var(--cham) 50%,var(--tim) 80%,transparent);background-size:200% 100%;
  animation:p3-ray 4s linear infinite;opacity:.8}
@keyframes p3-ray{to{background-position:-200% 0}}
.qt3__ray li{position:relative;text-align:center;padding:0 6px;transition-delay:calc(var(--i) * 90ms)}
.qt3__so{position:relative;width:62px;height:62px;margin:0 auto 16px;border-radius:20px;display:grid;place-items:center;font-size:22px;font-weight:780;
  background:linear-gradient(145deg,#12306A,#0A1530);border:1px solid rgba(94,240,255,.4);
  box-shadow:0 0 0 6px var(--nen),0 14px 34px -10px rgba(43,173,227,.8),inset 0 1px 0 rgba(255,255,255,.2);
  transform:perspective(300px) rotateX(18deg)}
.qt3__ray b{display:block;font-size:17px}
.qt3__ray p{font-size:14px;color:var(--chu-2);margin-top:4px}
@media (max-width:900px){
  .qt3__ray{grid-template-columns:1fr;gap:22px;max-width:520px;margin:0 auto}
  .qt3__ray::before{left:30px;right:auto;top:10px;bottom:10px;width:2px;height:auto;background:linear-gradient(var(--cyan),var(--tim))}
  .qt3__ray li{text-align:left;display:grid;grid-template-columns:62px 1fr;column-gap:18px;align-items:center;padding:0}
  .qt3__so{margin:0;grid-row:span 2}
}

/* ── Tư vấn (CTA cuối) ── */
.tv3{padding-bottom:var(--muc-dem)}
.tv3__khung{position:relative;display:grid;grid-template-columns:1fr 1.05fr;gap:44px;padding:48px;border-radius:36px;overflow:hidden;overflow:clip;
  background:radial-gradient(80% 90% at 0% 0%,rgba(43,173,227,.22),transparent 60%),radial-gradient(70% 80% at 100% 100%,rgba(123,92,245,.25),transparent 60%),var(--nen-2);
  border:1px solid var(--vien-2);box-shadow:0 50px 120px -50px rgba(43,120,227,.6)}
.tv3__trai{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.tv3__tieu-de{font-size:clamp(1.8rem,3.2vw,2.7rem);font-weight:760;line-height:1.12;letter-spacing:-.03em}
.tv3__mo-ta{color:var(--chu-2)}
.tv3__loi-ich{list-style:none;margin:4px 0 0;padding:0;display:flex;flex-direction:column;gap:10px}
.tv3__loi-ich li{display:flex;gap:10px;align-items:center}
.tv3__loi-ich svg{color:var(--cyan-sang);flex:none}
.tv3__hoac{margin-top:10px;font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--chu-3)}
a.tv3__goi{display:inline-flex;align-items:center;gap:10px;font-size:clamp(1.5rem,2.6vw,2rem);font-weight:760;letter-spacing:-.02em;
  background:var(--grad-chu);-webkit-background-clip:text;background-clip:text;color:transparent}
.tv3__goi svg{color:var(--cyan-sang)}
.tv3__form{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-content:start;padding:26px;border-radius:26px;
  background:rgba(6,13,31,.6);border:1px solid var(--vien)}
.o{display:flex;flex-direction:column;gap:7px;font-size:13.5px;font-weight:600;color:var(--chu-2)}
.o--rong{grid-column:1/-1}
.o input,.o select,.o textarea{width:100%;min-height:50px;padding:12px 14px;border-radius:14px;border:1px solid var(--vien-2);
  background:rgba(255,255,255,.05);color:var(--chu);font:500 15.5px/1.4 var(--font);transition:border-color .2s,box-shadow .2s,background-color .2s}
.o textarea{resize:vertical;min-height:92px}
.o select option{background:var(--nen-2);color:var(--chu)}
.o input::placeholder,.o textarea::placeholder{color:#6F82A0}
.o input:focus,.o select:focus,.o textarea:focus{outline:none;border-color:var(--cyan);background:rgba(255,255,255,.08);box-shadow:0 0 0 4px rgba(43,173,227,.22)}
.tv3__form .nut{grid-column:1/-1;margin-top:4px;min-height:56px;font-size:16px}
.tv3__rieng-tu{grid-column:1/-1;font-size:12.5px;color:var(--chu-3);text-align:center}
.o-bay{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
@media (max-width:900px){.tv3__khung{grid-template-columns:1fr;padding:30px 22px;gap:30px}}
@media (max-width:520px){.tv3__form{grid-template-columns:1fr;padding:18px}.muc{padding-left:14px;padding-right:14px}}

/* ── Thanh CTA dính đáy (mobile) ── */
.dinh{display:none}
@media (max-width:900px){
  .dinh{position:fixed;left:10px;right:10px;bottom:calc(10px + env(safe-area-inset-bottom));z-index:90;display:grid;grid-template-columns:1fr 1.4fr;gap:8px;
    padding:8px;border-radius:22px;background:rgba(6,13,31,.82);border:1px solid var(--vien-2);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:0 18px 50px -14px rgba(0,0,0,.8);
    transition:transform .4s cubic-bezier(.2,.9,.3,1),opacity .3s}
  .co-js .dinh:not(.hien){transform:translateY(140%);opacity:0;pointer-events:none}
  .dinh a{display:flex;align-items:center;justify-content:center;gap:8px;min-height:48px;border-radius:16px;font-weight:650;font-size:15px}
  .dinh__goi{background:rgba(255,255,255,.08);border:1px solid var(--vien-2)}
  .dinh__tv{background:var(--grad-nut);color:#fff}
  .pal-chan{padding-bottom:110px!important}
}

/* ── Chân trang (tối) — giữ bố cục GRID của bản cũ (bẫy flex-wrap trôi mép, docs/bay-ky-thuat.md) ── */
.pal-chan{border-top:1px solid var(--vien);padding:44px 0 34px;background:rgba(4,9,22,.7)}
.pal-chan__bo{max-width:1240px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:1.3fr 1fr auto;gap:22px 48px;
  font-size:14px;color:var(--chu-3)}
.pal-chan__bo a{transition:color .25s}
.pal-chan__bo a:hover{color:var(--cyan-sang)}
.pal-chan__trai,.pal-chan__phai{display:flex;flex-direction:column;gap:6px}
.pal-chan__ten{color:var(--chu);font-weight:650}
.pal-chan__lk{display:flex;gap:8px 18px;flex-wrap:wrap}
/* img.pal-chan__logo: gắn tên thẻ để thắng ".pal-home img" (bẫy độ đặc hiệu đã gặp ở bản cũ). Chip trắng
   vì logo chữ navy. align-self tránh bị kéo giãn trong flex cột. */
img.pal-chan__logo{display:block;height:34px;width:auto;align-self:flex-start;margin-bottom:8px;background:#fff;border-radius:10px;padding:5px 10px}
.chan-qr{display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}
.chan-qr img{width:112px;height:112px;display:block;border-radius:10px;background:#fff;padding:6px}
.chan-qr span{font-size:12.5px;line-height:1.4;max-width:132px}
@media (max-width:899px){.pal-chan__bo{gap:18px 24px}}
@media (max-width:599px){.pal-chan__bo{grid-template-columns:1fr}.chan-qr{align-items:flex-start;text-align:left}}

/* ── Giảm chuyển động: tắt MỌI animation kể cả trên ::before/::after (bẫy đã ghi ở docs/bay-ky-thuat.md). ── */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .co-js .hien-dan{opacity:1;transform:none}
  .tang3__tia{display:none}
}