/* Website P Live (idollive.media) — 14/10/2026. Bố cục tham khảo bản Peter gửi; màu theo LOGO P Live: cam (viên "LIVE",
   chấm chữ P) là màu chính, cyan / hồng (viền chữ P) là màu phụ, nền gần đen — giữ tinh thần neon × glass Peter duyệt 06/09.
   Nút cam dùng chữ đen như viên "LIVE" (tương phản AA). Trang tĩnh, không thư viện ngoài (trừ font Be Vietnam Pro). Biên soạn: Peter. */
:root{
  color-scheme:dark;
  --bg:#07060f;--bg-2:#0d0b1c;--bg-3:#141128;
  --panel:rgba(255,255,255,.035);--panel-2:rgba(255,255,255,.065);
  --line:rgba(255,255,255,.10);--line-2:rgba(255,255,255,.18);
  --fg:#f4f6fb;--fg-2:#b6bccd;--fg-3:#8890a6;
  --cam:#ff7a2f;--cam-2:#ff9447;--cam-3:#f2530a;--cam-sang:#ffb27a;
  --neon:#3ce8ff;--neon-2:#ff45e0;--neon-3:#8b5cff;
  --ok:#3ff5a8;--warn:#ffcf5c;--err:#ff6b8a;--live:#ff3b6b;
  --r:14px;--r-lg:22px;
  --grad:linear-gradient(90deg,#ff9447,#ff5a5f 50%,#ff45e0);
  --grad-nut:linear-gradient(180deg,#ff9447,#f2530a);
  --shadow:0 30px 80px -30px rgba(0,0,0,.85);
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}   /* .form / .kenh … đặt display riêng — không được đè thuộc tính hidden */
html{scroll-behavior:smooth;scroll-padding-top:88px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 var(--font);-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(820px 520px at 85% -10%,rgba(242,83,10,.20),transparent 60%),
             radial-gradient(700px 480px at -10% 30%,rgba(255,69,224,.10),transparent 60%),
             radial-gradient(600px 420px at 60% 110%,rgba(60,232,255,.08),transparent 60%)}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--cam-sang);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--cam-2);color:#1a0900;padding:10px 14px;border-radius:8px;font-weight:700}
.skip:focus{top:12px}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.ico{width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

/* ── header ── */
.site-top{position:sticky;top:0;z-index:30;background:rgba(7,6,15,.72);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);border-bottom:1px solid var(--line)}
.site-top .wrap{height:72px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand img{height:30px;width:auto}
.nav{display:flex;gap:4px;margin:0 auto;font-size:14px}
.nav a{padding:8px 11px;border-radius:8px;color:var(--fg-2);transition:color .15s,background .15s;white-space:nowrap}
.nav a:hover{color:var(--fg);background:var(--panel)}
.nav a[aria-current="page"]{color:var(--fg);background:var(--panel-2)}
.top-cta{display:flex;gap:10px;flex:none}
.nav-cta{display:none}
.menu-btn{display:none;margin-left:auto;width:44px;height:44px;border-radius:10px;border:1px solid var(--line-2);background:var(--panel);
  align-items:center;justify-content:center}

/* ── nút ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:11px 20px;border-radius:12px;
  border:1px solid transparent;font-weight:700;font-size:15px;line-height:1.2;transition:transform .15s,box-shadow .2s,background .2s}
.btn.primary{background:var(--grad-nut);color:#1a0900;box-shadow:0 0 28px -8px rgba(255,122,47,.75)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 0 34px -6px rgba(255,122,47,.9)}
.btn.ghost{background:var(--panel);border-color:var(--line-2);color:var(--fg)}
.btn.ghost:hover{background:var(--panel-2);transform:translateY(-2px)}
.btn.sm{min-height:40px;padding:8px 14px;font-size:14px;border-radius:10px}
.btn[aria-disabled="true"],.btn:disabled{opacity:.5;pointer-events:none}
.text-link{color:var(--cam-sang);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.text-link:hover{text-decoration:underline}

/* ── chữ ── */
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--cam-sang)}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border:1px solid var(--line-2);border-radius:999px;font-size:12px;
  font-weight:600;letter-spacing:.06em;color:var(--fg-2);background:var(--panel)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--live);box-shadow:0 0 12px var(--live);animation:nhip 1.8s ease-in-out infinite}
h1,h2,h3{margin:0;line-height:1.2;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(38px,5.4vw,64px);font-weight:800;letter-spacing:-.035em;margin:20px 0}
h1 em,h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
h2{font-size:clamp(28px,3.2vw,40px);font-weight:800;margin:10px 0 12px}
h3{font-size:19px;font-weight:700}
p{margin:0 0 12px}
.lead{font-size:18px;color:var(--fg-2);max-width:560px;line-height:1.7}
.sub{color:var(--fg-2)}
.micro{font-size:13px;color:var(--fg-3)}
.chu-nho{font-size:13px;color:var(--fg-3)}

/* ── hero ── */
.hero{padding:56px 0 48px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,540px);gap:40px;align-items:center}
.hero h1{font-size:clamp(36px,4.1vw,52px)}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero-notes{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;font-size:14px;color:var(--fg-2)}
.hero-notes span{display:inline-flex;align-items:center;gap:8px}
.hero-notes .ico{width:18px;height:18px;color:var(--cam-2)}

/* ── phòng live thử (điện thoại + bảng P Live + khay quà) ── */
.phong{display:grid;grid-template-columns:minmax(0,272px) minmax(0,1fr);grid-template-areas:"dt ben" "khay khay" "ghi ghi";gap:14px;align-items:stretch}
.dt{grid-area:dt;position:relative;aspect-ratio:9/16;border-radius:30px;padding:7px;background:linear-gradient(160deg,#2c2546,#0c0a16);
  box-shadow:var(--shadow),0 0 0 1px rgba(255,255,255,.12),0 0 70px -24px rgba(255,122,47,.6)}
.dt-man{position:relative;width:100%;height:100%;border-radius:24px;overflow:hidden;background:#0b0a18;isolation:isolate}
.dt-cho,.dt-v,.dt-nguon,.dt-key,.dt-hu,.dt-hu iframe{position:absolute;inset:0;width:100%;height:100%}
.dt-cho,.dt-v,.dt-nguon{object-fit:cover}
.dt-cho{z-index:0;animation:tho 6s ease-in-out infinite;transform-origin:50% 62%}
.dt-v{z-index:1;opacity:0;transition:opacity .12s}
.dt-v.hien{opacity:1}
.dt-nguon{z-index:0;opacity:0;pointer-events:none}
.dt-nguon.tho.nen-den{z-index:2;opacity:1;mix-blend-mode:screen}
.dt-key{z-index:2;pointer-events:none}
.dt-hu{z-index:3;pointer-events:none}
.dt-hu iframe{border:0;background:transparent}
.dt-dau{position:absolute;z-index:4;left:10px;right:10px;top:10px;display:flex;justify-content:space-between;align-items:center}
.dt-dau .onair{position:static}
.dt-xem{display:inline-flex;align-items:center;gap:5px;font-size:11px;background:rgba(0,0,0,.42);padding:3px 9px;border-radius:999px;color:#fff}
.dt-xem .ico{width:13px;height:13px}
.dt-toast{position:absolute;z-index:4;left:8px;top:15%;max-width:86%;display:flex;align-items:center;gap:8px;padding:4px 12px 4px 4px;border-radius:999px;
  background:linear-gradient(90deg,rgba(242,83,10,.9),rgba(255,69,224,.6));color:#fff;font-size:11.5px;line-height:1.25;opacity:0;
  transform:translateX(-16px);transition:opacity .25s,transform .25s;pointer-events:none}
.dt-toast.hien{opacity:1;transform:none}
.dt-toast img{width:34px;height:34px;border-radius:50%;background:rgba(0,0,0,.28);padding:3px;flex:none}
.dt-toast b{display:block;font-size:12px}
.dt-toast em{font-style:normal;font-weight:800;font-size:18px;color:#ffe49b;margin-left:2px}
.ben{grid-area:ben;display:flex;flex-direction:column;gap:10px;padding:14px;border-radius:20px;border:1px solid var(--line-2);min-width:0;min-height:0;
  background:linear-gradient(180deg,rgba(20,17,40,.94),rgba(11,10,24,.94));font-size:13px;overflow:hidden;contain:size}
/* contain:size — chiều cao hàng lấy theo điện thoại (tỉ lệ 9:16), bảng bên cạnh cao bằng, phần thừa cuộn trong ô "Quà → hiệu ứng" */
.ben-dau{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-bottom:9px;border-bottom:1px solid var(--line)}
.ben-dau img{height:22px;width:auto}
.ben-tt{display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:700;color:var(--ok)}
.ben-tt i{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px var(--ok);animation:nhip 1.8s ease-in-out infinite}
.ben-tieu{display:block;font-size:10.5px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3);margin-bottom:6px}
.ben-tieu b{color:var(--cam-sang)}
.ben-dang{min-height:36px;line-height:1.3;color:var(--fg-2)}
.ben-dang b{display:block;font-size:14px;color:var(--fg)}
.ben-dang small{color:var(--fg-3);font-size:12px}
.ben-tien{height:4px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;margin-top:6px}
.ben-tien i{display:block;height:100%;width:0;background:var(--grad)}
.ben-hang,.ben-map{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.ben-hang li,.ben-map li{display:flex;align-items:center;gap:8px;padding:4px 8px;border-radius:8px;background:rgba(255,255,255,.035);min-width:0}
.ben-hang li span,.ben-map li span{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--fg)}
.ben-hang li small{color:var(--fg-3);font-size:11px;white-space:nowrap}
.ben-hang .trong,.ben-hang .them{color:var(--fg-3);font-style:italic;background:none;padding:2px 0}
.ben-hang img,.ben-map img{width:20px;height:20px;flex:none}
.ben-map-o{flex:1;min-height:0;overflow:auto;scrollbar-width:thin}
.ben-map li{transition:background .2s,box-shadow .2s}
.ben-map li.sang{background:rgba(255,122,47,.2);box-shadow:inset 0 0 0 1px var(--cam-2)}
.ben-map small{font-size:10px;font-weight:700;padding:2px 6px;border-radius:5px;white-space:nowrap}
.k-phu{color:var(--neon);background:rgba(60,232,255,.1)}
.k-npc{color:var(--cam-sang);background:rgba(255,122,47,.13)}
.k-hu{color:var(--neon-2);background:rgba(255,69,224,.1)}
.ben-so{display:flex;justify-content:space-between;gap:8px;padding-top:8px;border-top:1px solid var(--line);color:var(--fg-2);font-size:12px}
.ben-so b{color:var(--fg)}
.khay{grid-area:khay;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.khay button{display:grid;grid-template-columns:28px minmax(0,1fr);grid-template-rows:auto auto;column-gap:7px;align-items:center;text-align:left;
  min-height:54px;padding:7px 8px;border-radius:14px;border:1px solid var(--line-2);background:var(--panel);color:var(--fg);
  transition:transform .15s,border-color .15s,background .15s}
.khay button:hover{border-color:var(--cam-2);background:rgba(255,122,47,.10);transform:translateY(-2px)}
.khay button img{grid-row:1/3;width:28px;height:28px}
.khay button span{font-weight:700;font-size:12px;letter-spacing:-.01em;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.khay button small{font-weight:600;color:var(--cam-sang);font-size:11.5px;line-height:1.2}
.khay button.bam{animation:bam .35s ease}
.khay-ghi{grid-area:ghi;margin:0;text-align:center}

/* ── demo quà gọn (concept) ── */
.stage{position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:300px;
  background:radial-gradient(ellipse at 50% 35%,rgba(139,92,255,.35),transparent 60%),linear-gradient(150deg,#0f2a35,#16133a 55%,#2c1438)}
.stage::before{content:"";position:absolute;inset:0;opacity:.5;
  background:repeating-linear-gradient(90deg,transparent 0 47px,rgba(255,255,255,.035) 48px),repeating-linear-gradient(0deg,transparent 0 47px,rgba(255,255,255,.035) 48px)}
.onair{position:absolute;left:12px;top:12px;z-index:2;display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:800;letter-spacing:.08em;
  background:var(--live);color:#fff;padding:3px 8px;border-radius:6px}
.viewers{position:absolute;right:12px;top:12px;z-index:2;font-size:11px;color:#e8e9f3;background:rgba(0,0,0,.35);padding:3px 8px;border-radius:6px}
.idol{position:relative;width:120px;height:120px;border-radius:50%;display:grid;place-items:center;z-index:1;
  background:radial-gradient(circle at 35% 30%,#ffd6f6,#ff45e0 38%,#8b5cff 72%);box-shadow:0 0 60px rgba(255,69,224,.35);
  border:2px solid rgba(255,255,255,.65)}
.idol svg{width:62px;height:62px;stroke:#2a0d3d;fill:none;stroke-width:2.2}
.stage-cap{position:relative;z-index:1;margin-top:16px;text-align:center;font-weight:700;font-size:15px;padding:0 14px}
.toast-qua{position:absolute;left:12px;bottom:12px;right:12px;z-index:3;display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:10px;
  background:rgba(7,6,15,.72);border:1px solid var(--line-2);font-size:13px;opacity:0;transform:translateY(8px);transition:opacity .25s,transform .25s}
.toast-qua.hien{opacity:1;transform:none}
.toast-qua b{color:var(--cam-sang)}
.toast-qua img{width:26px;height:26px;flex:none}
.hieu-ung{position:absolute;inset:0;z-index:2;pointer-events:none}
.hieu-ung img{position:absolute;bottom:-40px;animation:bay 1.6s ease-out forwards}

/* ── dải tích hợp ── */
.strip{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px 34px;padding:22px 0;border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);color:var(--fg-3);font-size:13px}
.strip b{color:var(--fg);font-weight:700;font-size:15px;display:inline-flex;align-items:center;gap:8px}
.strip .ico{color:var(--cam-2)}

/* ── khối ── */
section.khoi{padding:80px 0}
.dau-khoi{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:32px}
.dau-khoi .sub{max-width:520px}
.luoi3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.luoi4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.luoi2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.the{position:relative;display:block;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--panel);padding:24px;
  transition:transform .2s,border-color .2s,background .2s}
a.the:hover{transform:translateY(-4px);border-color:rgba(255,122,47,.6);background:var(--panel-2)}
.the h3{margin:14px 0 8px}
.the p{color:var(--fg-2);font-size:15px;margin:0}
.the .ico-o{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:rgba(255,122,47,.12);color:var(--cam-2);
  border:1px solid rgba(255,122,47,.3)}
.the .ico-o.hong{background:rgba(255,69,224,.10);color:var(--neon-2);border-color:rgba(255,69,224,.28)}
.the .ico-o.tim{background:rgba(60,232,255,.10);color:var(--neon);border-color:rgba(60,232,255,.28)}
.the .ico-o .ico{width:24px;height:24px}
.the ul{margin:12px 0 0;padding-left:18px;color:var(--fg-2);font-size:15px}
.the li{margin:4px 0}
.nhan{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--cam-sang);
  border:1px solid rgba(255,122,47,.4);border-radius:6px;padding:3px 8px}
.nhan.sap{color:var(--warn);border-color:rgba(255,207,92,.4)}
.concept{overflow:hidden;padding:0}
.concept .anh{height:150px;display:grid;place-items:center;position:relative;overflow:hidden;
  background:radial-gradient(ellipse at center,rgba(255,122,47,.26),transparent 70%),#1a0f0a}
.concept .anh.hong{background:radial-gradient(ellipse at center,rgba(255,69,224,.24),transparent 70%),#1a0f22}
.concept .anh.tim{background:radial-gradient(ellipse at center,rgba(60,232,255,.22),transparent 70%),#0e1424}
.concept .anh.vang{background:radial-gradient(ellipse at center,rgba(255,207,92,.22),transparent 70%),#1a160a}
.concept .anh .ico{width:64px;height:64px;stroke-width:1.4;color:#fff;filter:drop-shadow(0 0 18px rgba(255,148,71,.65))}
.concept .anh b{position:absolute;right:14px;bottom:-10px;font-size:46px;font-weight:800;letter-spacing:.06em;color:rgba(255,255,255,.07)}
.concept .noi{padding:22px 24px}

/* ── dải clip hiệu ứng ── */
.ray-dau{display:flex;justify-content:flex-end;gap:8px;margin:-6px 0 12px}
.ray-nut{width:44px;height:44px;border-radius:12px;border:1px solid var(--line-2);background:var(--panel);font-size:24px;line-height:1;color:var(--fg)}
.ray-nut:hover{border-color:var(--cam-2);background:rgba(255,122,47,.1)}
.trung-bay{display:grid;grid-auto-flow:column;grid-auto-columns:clamp(176px,21vw,226px);gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:4px 2px 16px;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.2) transparent}
.hu{margin:0;scroll-snap-align:start;min-width:0}
.hu-khung{position:relative;aspect-ratio:9/16;border-radius:18px;overflow:hidden;border:1px solid var(--line-2);background:#0b0a18}
.hu-khung.tach{background:radial-gradient(ellipse at 50% 42%,rgba(255,122,47,.24),transparent 62%),
  repeating-conic-gradient(rgba(255,255,255,.035) 0 25%,transparent 0 50%) 0 0/22px 22px,#0d0b1c}
.hu-khung img,.hu-khung video,.hu-khung canvas{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hu-khung .hu-vid{opacity:0;transition:opacity .2s}
.hu.chay .hu-vid{opacity:1}
.hu-khung .hu-nguon{opacity:0}
.hu-khung .hu-nguon.tho.nen-den{opacity:1;mix-blend-mode:screen}
.hu.chay .hu-khung.tach img{opacity:0}
.hu-loai{position:absolute;left:10px;top:10px;z-index:2;font-size:10.5px;font-weight:700;padding:3px 9px;border-radius:999px;background:rgba(0,0,0,.6);color:#fff}
.hu-nut{position:absolute;right:10px;bottom:10px;z-index:3;width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.35);
  background:rgba(7,6,15,.62);color:#fff;display:grid;place-items:center;transition:background .2s,border-color .2s}
.hu-nut .ico{width:18px;height:18px;fill:currentColor;stroke:none;margin-left:2px}
.hu-nut:hover,.hu-nut[aria-pressed="true"]{background:var(--cam-3);border-color:var(--cam-2)}
.hu figcaption{padding:12px 2px 0}
.hu figcaption b{display:block;font-size:15px}
.hu figcaption span{display:block;color:var(--fg-2);font-size:13.5px;line-height:1.5;margin-top:4px}

/* ── demo ── */
.demo{border:1px solid var(--line-2);border-radius:26px;padding:36px;background:linear-gradient(125deg,rgba(255,122,47,.08),rgba(255,69,224,.06) 50%,rgba(60,232,255,.05))}
.demo-luoi{display:grid;grid-template-columns:1fr 1.05fr;gap:32px;margin-top:24px;align-items:start}
.tabs{display:flex;flex-wrap:wrap;gap:8px}
.tab{min-height:44px;padding:9px 16px;border-radius:10px;border:1px solid var(--line-2);background:transparent;color:var(--fg-2);font-weight:600;font-size:14px}
.tab[aria-pressed="true"]{background:rgba(255,122,47,.14);border-color:var(--cam-2);color:var(--fg)}
.nut-qua{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0 14px}
.nut-qua button{min-height:104px;border-radius:14px;border:1px solid var(--line-2);background:var(--panel);display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;font-weight:700;font-size:14px;transition:transform .15s,border-color .15s,background .15s}
.nut-qua button:hover{border-color:var(--cam-2);background:rgba(255,122,47,.10);transform:translateY(-2px)}
.nut-qua button img{width:44px;height:44px}
.nut-qua button small{font-weight:500;color:var(--fg-3);font-size:12px}
.so-demo{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:14px;color:var(--fg-2);margin-top:12px}
.so-demo b{color:var(--fg)}
.bxh{margin-top:14px;border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:rgba(0,0,0,.2)}
.bxh .dong{display:flex;justify-content:space-between;gap:12px;font-size:14px;padding:4px 0;color:var(--fg-2)}
.bxh .dong b{color:var(--fg);white-space:nowrap}
.pk-thanh{display:flex;height:12px;border-radius:999px;overflow:hidden;margin-top:12px;background:#24203d}
.pk-thanh i{display:block;background:var(--cam-2);transition:width .35s}
.pk-thanh i+i{background:var(--neon-2)}

/* ── bước ── */
.buoc{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:b}
.buoc>div{border-top:2px solid var(--line-2);padding-top:18px}
.buoc>div::before{counter-increment:b;content:"0" counter(b);display:block;font-weight:800;color:var(--cam-2);font-size:14px;margin-bottom:8px}
.buoc p{color:var(--fg-2);font-size:15px}

/* ── giá ── */
.gia-luoi{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:920px}
.goi{display:flex;flex-direction:column}
.goi .nhan{align-self:flex-start}
.goi.noi-bat{border-color:rgba(255,122,47,.6);box-shadow:0 0 40px -18px rgba(255,122,47,.65)}
.so-gia{font-size:40px;font-weight:800;letter-spacing:-.02em;margin:14px 0 2px}
.so-gia small{font-size:15px;font-weight:500;color:var(--fg-2);letter-spacing:0}
.goi .btn{margin-top:auto}
.goi ul{margin-bottom:22px}
.bang{width:100%;border-collapse:collapse;font-size:15px;margin-top:8px}
.bang th,.bang td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left}
.bang th{color:var(--fg-2);font-weight:600}
.bang-khung{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--panel)}

/* ── trang con ── */
.trang{padding:56px 0 90px;min-height:60vh}
.trang.dau{min-height:0}
.duong-dan{font-size:13px;color:var(--fg-3);margin-bottom:18px}
.duong-dan a{color:var(--fg-2)}
.duong-dan a:hover{color:var(--cam-sang)}
.trang h1{font-size:clamp(34px,4.4vw,52px)}
.khung{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--panel);padding:26px;margin:22px 0}
.khung h2{font-size:24px;margin-top:0}
.khung ol,.khung ul{padding-left:22px;color:var(--fg-2)}
.khung li{margin:8px 0}
.khung li b{color:var(--fg)}
.canh{border:1px solid rgba(255,207,92,.35);background:rgba(255,207,92,.07);color:#ffe7a8;border-radius:12px;padding:14px 16px;font-size:15px}
.tai-o{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;font-size:14px;color:var(--fg-2);margin:16px 0}
.tai-o b{color:var(--fg);font-weight:600}
.ma-bam{font-family:ui-monospace,Consolas,monospace;font-size:12px;word-break:break-all;color:var(--fg-2)}
.tai-lieu{display:grid;grid-template-columns:240px 1fr;gap:36px}
.muc-luc{position:sticky;top:96px;align-self:start;display:flex;flex-direction:column;gap:2px}
.muc-luc a{padding:9px 12px;border-left:2px solid var(--line);color:var(--fg-2);font-size:14px}
.muc-luc a[aria-current="page"]{border-color:var(--cam-2);color:var(--fg)}
.muc-luc a:hover{color:var(--fg)}
details{border-bottom:1px solid var(--line);padding:16px 0}
summary{cursor:pointer;font-weight:700;font-size:16px;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--cam-2);font-size:22px;line-height:1}
details[open] summary::after{content:"–"}
details p{color:var(--fg-2);margin:10px 0 0}
.kenh{display:flex;flex-wrap:wrap;gap:12px;margin-top:16px}

/* ── form · mã kích hoạt · thông báo ── */
.form{display:flex;flex-direction:column;gap:14px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600;color:var(--fg-2)}
.form input,.form select,.form textarea{min-height:46px;padding:10px 14px;border-radius:12px;border:1px solid var(--line-2);background:rgba(0,0,0,.28);
  color:var(--fg);font-size:16px;font-weight:500;width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--cam-2);box-shadow:0 0 0 3px rgba(255,122,47,.25)}
.form select option{background:#141128;color:var(--fg)}
.form .btn{align-self:flex-start}
.ma-khoa{display:inline-block;font-family:ui-monospace,Consolas,monospace;font-size:clamp(15px,2.4vw,20px);letter-spacing:.06em;padding:10px 14px;
  border-radius:12px;background:rgba(0,0,0,.3);border:1px dashed rgba(255,122,47,.55);color:var(--cam-sang);word-break:break-all}
.thong-bao{margin-top:16px;padding:12px 16px;border-radius:12px;border:1px solid var(--line-2);background:var(--panel-2);font-size:15px}
.thong-bao.ok{border-color:rgba(63,245,168,.45);background:rgba(63,245,168,.08);color:#c4ffe6}
.thong-bao.loi{border-color:rgba(255,107,138,.5);background:rgba(255,107,138,.09);color:#ffd5de}

/* ── kiến thức ── */
.ds-bai{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.the-bai{display:flex;flex-direction:column}
.the-bai .nhan{align-self:flex-start}
.the-bai h3{font-size:20px;line-height:1.35}
.the-bai .bai-meta{margin-top:auto;padding-top:16px}
.bai{max-width:740px;margin:0 auto}
.bai-meta{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;color:var(--fg-3);font-size:14px}
.bai h1{font-size:clamp(30px,4vw,46px);margin:16px 0 14px}
.bai .lead{max-width:none}
.bai-than{font-size:17px;line-height:1.8;color:#dfe3ee;margin-top:30px}
.bai-than h2{font-size:clamp(22px,2.4vw,28px);margin:40px 0 12px}
.bai-than h3{font-size:19px;margin:28px 0 8px}
.bai-than p{margin:0 0 16px}
.bai-than ul,.bai-than ol{padding-left:22px;margin:0 0 18px}
.bai-than li{margin:7px 0}
.bai-than strong{color:var(--fg)}
.bai-than blockquote{margin:22px 0;padding:14px 18px;border-left:3px solid var(--cam-2);background:var(--panel);border-radius:0 12px 12px 0;color:var(--fg)}
.bai-cuoi{margin-top:44px;padding:26px;border-radius:var(--r-lg);border:1px solid var(--line-2);background:var(--panel)}
.bai-cuoi h2{font-size:24px;margin-top:0}

/* ── kêu gọi ── */
.cta{text-align:center;border:1px solid var(--line-2);border-radius:28px;padding:64px 24px;margin:20px 0 90px;
  background:radial-gradient(ellipse at 50% 120%,rgba(242,83,10,.30),transparent 65%),var(--panel)}
.cta .actions{justify-content:center}

/* ── chân trang ── */
.site-foot{border-top:1px solid var(--line);padding:48px 0 28px;font-size:14px;color:var(--fg-2)}
.foot-luoi{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}
.site-foot b{display:block;color:var(--fg);margin-bottom:10px;font-size:14px}
.site-foot a{display:block;padding:4px 0;color:var(--fg-2)}
.site-foot a:hover{color:var(--cam-sang)}
.site-foot .brand img{height:28px}
.foot-cuoi{margin-top:32px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--fg-3)}

/* ── chuyển động ── */
@keyframes nhip{50%{opacity:.35}}
@keyframes bay{0%{opacity:0;transform:translateY(0) scale(.6)}15%{opacity:1}100%{opacity:0;transform:translateY(-320px) scale(1.25)}}
@keyframes rung{0%,100%{transform:none}30%{transform:scale(1.08) rotate(-4deg)}60%{transform:scale(1.04) rotate(3deg)}}
@keyframes tho{50%{transform:scale(1.018)}}
@keyframes bam{40%{transform:scale(.93)}}
.idol.rung{animation:rung .6s ease}

/* ── màn hình nhỏ ── */
@media (max-width:1120px){
  .nav a{padding:8px 8px}
  .site-top .wrap{gap:16px}
}
@media (max-width:1020px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .phong{max-width:640px;width:100%;justify-self:center}
  .demo-luoi{grid-template-columns:1fr}
  .foot-luoi{grid-template-columns:1fr 1fr 1fr}
  .foot-luoi>div:first-child{grid-column:1/-1}
  .luoi4{grid-template-columns:repeat(2,1fr)}
  .ds-bai{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:960px){
  .nav,.top-cta{display:none}
  .menu-btn{display:inline-flex}
  .site-top.mo .nav{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;gap:2px;padding:14px 16px 18px;
    background:#0b0a18;border-bottom:1px solid var(--line)}
  .site-top.mo .nav a{padding:12px}
  .site-top.mo .nav .nav-cta{display:flex;gap:10px;margin-top:10px}
  .site-top.mo .nav .nav-cta .btn{flex:1;padding:12px}
}
@media (max-width:860px){
  .luoi3,.buoc{grid-template-columns:1fr}
  .luoi2,.gia-luoi{grid-template-columns:1fr}
  .tai-lieu{grid-template-columns:1fr}
  .muc-luc{position:static;flex-direction:row;overflow-x:auto}
  .muc-luc a{border-left:0;border-bottom:2px solid var(--line);white-space:nowrap}
  .muc-luc a[aria-current="page"]{border-color:var(--cam-2)}
  .dau-khoi{flex-direction:column;align-items:flex-start}
  .ds-bai{grid-template-columns:1fr}
}
@media (max-width:600px){
  .phong{grid-template-columns:1fr;grid-template-areas:"dt" "khay" "ghi" "ben"}
  .dt{width:min(100%,330px);justify-self:center}
  .khay button{grid-template-columns:1fr;grid-template-rows:auto auto auto;justify-items:center;text-align:center;row-gap:2px;padding:8px 4px;min-height:84px}
  .khay button img{grid-row:auto;width:34px;height:34px}
  .khay button span{font-size:11.5px;max-width:100%;white-space:normal;overflow:visible;line-height:1.15}
  .khay button{min-height:92px}
  .ben{contain:none}
  .ben-map-o{max-height:none;overflow:visible}
}
@media (max-width:560px){
  .wrap{padding:0 16px}
  .hero{padding:36px 0 32px}
  .lead{font-size:16px}
  section.khoi{padding:56px 0}
  .demo{padding:20px;border-radius:20px}
  .nut-qua{gap:8px}
  .nut-qua button{min-height:96px}
  .cta{padding:44px 18px}
  .foot-luoi{grid-template-columns:1fr 1fr}
  .tai-o{grid-template-columns:1fr}
  .luoi4{grid-template-columns:1fr}
  .khung{padding:20px}
  .ray-dau{display:none}
  .hero-notes{display:none}
  .strip span[aria-hidden]{display:none}
  .strip{gap:10px 22px}
  .trung-bay{grid-auto-columns:62vw}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}