*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#000; --panel:#0a0a0a; --orange:#ff9d00; --yellow:#ffd400; --white:#fff;
  --gray:#9a9a9a; --dgray:#1a1a1a;
  /* hệ màu phụ — mỗi màu gắn cố định với 1 nhóm nội dung, dùng lại xuyên suốt (blob, số thứ tự, viền hover) */
  --teal:#00c2b8; --purple:#7b2ff7; --green:#2fe66b; --red:#ff3b3b; --blue:#2f8bff;
  --disp:'Montserrat',sans-serif; --sans:'Inter',system-ui,sans-serif;
  --ease:cubic-bezier(.16,1,.3,1);
  --accent:var(--orange);
}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--white);overflow-x:hidden;line-height:1.5}
img,video{max-width:100%;display:block}
a:focus-visible,button:focus-visible,.h-badge:focus-visible{outline:2px solid var(--orange);outline-offset:3px;border-radius:4px}

/* ── reveal ── */
.rv{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.rv.in{opacity:1;transform:translateY(0)}
.rv.d1{transition-delay:.1s}.rv.d2{transition-delay:.2s}.rv.d3{transition-delay:.3s}

/* ── blobs ── */
.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.35;pointer-events:none;z-index:0}
.blob-orange{background:var(--orange)}
.blob-teal{background:var(--teal)}
.blob-purple{background:var(--purple)}
.blob-green{background:var(--green)}
.blob-red{background:var(--red)}
.blob-blue{background:var(--blue)}

/* ── nav ── */
header.topnav{position:fixed;top:0;left:0;right:0;z-index:200;display:flex;align-items:center;justify-content:space-between;padding:1.1rem 3rem;background:rgba(0,0,0,.55);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.logo{font-family:var(--disp);font-weight:800;font-size:1.05rem;letter-spacing:.02em;text-transform:uppercase}
.logo span{color:var(--orange)}
.topnav nav{display:flex;gap:1.4rem}
.topnav nav a{position:relative;color:rgba(255,255,255,.6);text-decoration:none;font-size:.78rem;letter-spacing:.05em;text-transform:uppercase;font-weight:600;transition:color .3s;padding-bottom:.3rem}
.topnav nav a::after{content:'';position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--orange);transition:right .3s var(--ease)}
.topnav nav a:hover{color:#fff}
.topnav nav a:hover::after{right:0}
.topnav nav a.active{color:var(--orange)}
.topnav nav a.active::after{right:0}
.topnav .cta{padding:.55rem 1.4rem;background:var(--orange);color:#000;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;text-decoration:none;border-radius:6px;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.topnav .cta:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,157,0,.35)}

/* hamburger (mobile) */
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:.4rem;z-index:210}
.hamburger span{width:24px;height:2px;background:#fff;transition:transform .3s var(--ease),opacity .3s var(--ease)}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media(max-width:900px){
  .hamburger{display:flex}
  .topnav nav{
    display:flex;flex-direction:column;align-items:flex-start;gap:0;
    position:fixed;top:0;right:0;height:100vh;width:min(78vw,320px);
    background:#0a0a0a;border-left:1px solid rgba(255,255,255,.08);
    padding:6.5rem 2rem 2rem;z-index:205;
    transform:translateX(100%);transition:transform .35s var(--ease);
  }
  .topnav nav.open{transform:translateX(0)}
  .topnav nav a{width:100%;padding:1rem 0;font-size:.85rem;border-bottom:1px solid rgba(255,255,255,.06)}
  .topnav .cta{display:none}
}

/* ── hero ── */
#hero{position:relative;min-height:calc(100vh - 88px);margin-top:88px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0;
  background:url('../baner.png') center/cover no-repeat;
  filter:saturate(1.1);
}
.hero-shade{position:absolute;inset:0;z-index:1;background:linear-gradient(to top,rgba(0,0,0,.35) 0%,rgba(0,0,0,.1) 20%,rgba(0,0,0,0) 40%)}
.hero-content{position:relative;z-index:2;max-width:900px}
.h-eyebrow{font-family:var(--disp);font-weight:900;font-size:clamp(2.2rem,6vw,4.2rem);letter-spacing:.02em;color:var(--yellow);text-transform:uppercase;text-shadow:0 2px 18px rgba(255,212,0,.3);margin-bottom:1.1rem;line-height:1}
.h-name-box{display:inline-block;background:var(--white);color:#000;padding:.5rem 1.6rem;font-family:var(--disp);font-weight:800;font-size:clamp(1.6rem,4vw,2.6rem);letter-spacing:-.01em;margin-bottom:1.75rem;border-radius:2px}
.h-badges{display:flex;gap:.8rem;margin-bottom:0}
.h-badge{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-family:var(--disp);font-weight:800;font-size:.95rem;color:#fff;border:1px solid rgba(255,255,255,.18);transition:transform .25s var(--ease)}
.h-badge:hover{transform:translateY(-4px)}
/* mỗi phần mềm 1 gam màu thương hiệu riêng, đủ sáng để nổi trên nền đen thay vì gần như đen như trước */
.h-badge--pr{background:linear-gradient(145deg,#3355ff,#00005b);box-shadow:0 0 22px rgba(51,85,255,.5)}
.h-badge--ae{background:linear-gradient(145deg,#a855ff,#2b0a5e);box-shadow:0 0 22px rgba(168,85,255,.5)}
.h-badge--cc{background:linear-gradient(145deg,#ff4d4d,#7a0000);box-shadow:0 0 22px rgba(255,77,77,.45)}

/* ── định hướng bản thân ── */
/* lùi 2 bên vào trong: padding ngang lớn hơn + nội dung giới hạn max-width, không tràn sát mép màn hình */
.sec{position:relative;padding:6.5rem clamp(2rem,7vw,7rem);background:var(--bg);overflow:hidden}
.sec > .cat-head,
.sec > .about-grid,
.sec > .vid-grid,
.sec > .wide-showcase{max-width:1280px;margin-left:auto;margin-right:auto}
.sec-title{font-family:var(--disp);font-weight:800;text-transform:uppercase;font-size:clamp(2.2rem,5vw,3.8rem);letter-spacing:.01em;color:var(--white);margin-bottom:.75rem;line-height:1.05}
.sec-title.underline::after{content:'';display:block;width:120px;height:3px;background:var(--white);margin:.9rem auto 0}
.about-grid{display:grid;grid-template-columns:380px 1fr;gap:5rem;align-items:center;margin-top:3rem;position:relative;z-index:1}
.phone-mock{position:relative;border:10px solid #1c1c1c;border-radius:34px;overflow:hidden;background:#111;box-shadow:0 30px 60px rgba(0,0,0,.6)}
.phone-mock .screen{aspect-ratio:9/17;background:linear-gradient(160deg,#151515,#0a0a0a);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;color:#666;padding:2rem}
.phone-mock .screen .avatar{width:64px;height:64px;border-radius:50%;background:#2a2a2a;display:flex;align-items:center;justify-content:center;overflow:hidden}
.phone-mock .screen .avatar img{width:100%;height:100%;object-fit:cover}
.phone-mock .screen .handle{color:#fff;font-weight:700;font-size:.95rem}
.phone-mock .screen .sub{font-size:.7rem;color:#777}
.phone-mock .screen .gridvids{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;width:100%;margin-top:1rem}
.phone-mock .screen .gv{aspect-ratio:9/16;border-radius:4px}
.about-text p{color:#c9c9c9;font-size:.98rem;line-height:1.85;margin-bottom:1.2rem;font-weight:300}
.about-text p:first-child{color:#fff;font-weight:500}

/* gradients (phone mock preview tiles) */
.g1{background:linear-gradient(150deg,#241a06,#3a2608 50%,#1a1204)}
.g2{background:linear-gradient(150deg,#06201f,#0a3230 50%,#031513)}
.g3{background:linear-gradient(150deg,#1e0a22,#33123a 50%,#150714)}
.g4{background:linear-gradient(150deg,#0a1e0c,#12331a 50%,#061206)}
.g5{background:linear-gradient(150deg,#1a0a24,#2b1240 50%,#0d0616)}
.g6{background:linear-gradient(150deg,#241606,#3a2408 50%,#180f04)}

/* category label — số thứ tự + tiêu đề căn giữa, to đậm giống mẫu tham khảo */
.cat-head{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:.9rem;text-align:center;margin-bottom:3rem}
.cat-num{font-family:var(--disp);font-weight:800;font-size:.78rem;letter-spacing:.08em;color:var(--accent);border:1px solid var(--accent);border-radius:20px;padding:.35rem .9rem;white-space:nowrap}

/* ── video mosaic: tối đa 3 video dọc mỗi hàng, cỡ lớn dễ xem, giữ control gốc ── */
.vid-grid{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;justify-content:center;gap:1.75rem;
}
.vid-tile{
  position:relative;flex:1 1 300px;max-width:380px;aspect-ratio:9/16;overflow:hidden;border-radius:16px;background:#0a0a0a;
  border:1px solid rgba(255,255,255,.1);
  box-shadow:0 14px 30px rgba(0,0,0,.45);
  transition:box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.vid-tile.wide{flex-basis:100%;max-width:100%;aspect-ratio:16/9}
.vid-tile video{width:100%;height:100%;object-fit:contain;background:#000;display:block}
.vid-tile::before{
  content:'';position:absolute;top:0;left:0;right:0;height:20%;z-index:1;pointer-events:none;
  background:linear-gradient(to bottom,rgba(0,0,0,.65),transparent);
}
.vid-tile .vid-caption{
  position:absolute;top:.8rem;left:.8rem;right:.8rem;z-index:2;pointer-events:none;
  font-family:var(--disp);font-weight:800;font-size:.8rem;line-height:1.35;color:#fff;
  text-transform:uppercase;letter-spacing:.01em;text-shadow:0 2px 8px rgba(0,0,0,.7);
}
.vid-tile:hover{box-shadow:0 22px 44px rgba(0,0,0,.6);border-color:var(--accent)}
.vid-tile:hover .vid-caption{color:var(--accent)}

/* ── wide showcase: dùng cho video ngang (16:9) — panel tiêu đề bên trái + khung video dạng thiết bị bên phải ── */
.wide-showcase{display:grid;grid-template-columns:.85fr 1.4fr;border-radius:22px;overflow:hidden;background:#000;box-shadow:0 30px 70px rgba(0,0,0,.55)}
.wide-showcase.single{grid-template-columns:1fr}
.wide-panel{position:relative;display:flex;align-items:center;padding:3rem 2.5rem;background:linear-gradient(150deg,var(--accent) 0%,#0b0b0b 65%);overflow:hidden}
.wide-panel::after{content:'';position:absolute;inset:-20% -10%;border:2px solid rgba(255,255,255,.18);border-radius:50%;transform:rotate(18deg) scale(1.3);pointer-events:none}
.wide-panel-title{position:relative;z-index:1;font-family:var(--disp);font-weight:800;font-size:clamp(1.9rem,3.4vw,2.8rem);line-height:1.1;color:#fff}
.wide-frame{background:#000;display:flex;align-items:center;justify-content:center;padding:2.5rem 1.5rem}
.wide-frame-inner{
  position:relative;width:100%;aspect-ratio:16/9;border-radius:14px;overflow:hidden;
  background:#000;border:1px solid rgba(255,255,255,.16);
  box-shadow:0 0 0 6px rgba(255,255,255,.04),0 30px 60px rgba(0,0,0,.6),0 0 90px -20px var(--accent);
}
.wide-frame-inner video{width:100%;height:100%;object-fit:contain;background:#000;display:block}
@media(max-width:800px){
  .wide-showcase{grid-template-columns:1fr}
  .wide-panel{padding:2.25rem 1.5rem}
}

/* footer */
footer{background:var(--panel);border-top:1px solid rgba(255,255,255,.08);padding:5rem 3rem 2.5rem;position:relative;overflow:hidden}
.ft-msg{max-width:760px;color:#c9c9c9;font-size:1rem;line-height:1.85;margin-bottom:2.5rem;font-weight:300;position:relative;z-index:1}
.ft-contact{display:flex;flex-direction:column;gap:.6rem;font-size:1rem;font-weight:600;margin-bottom:3rem;position:relative;z-index:1}
.ft-contact a{color:#fff;text-decoration:none;transition:color .3s}
.ft-contact a:hover{color:var(--orange)}
.ft-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;border-top:1px solid rgba(255,255,255,.08);padding-top:1.5rem;font-size:.75rem;color:#666;position:relative;z-index:1}
.ft-bottom a{color:#888;text-decoration:none}

@media(max-width:900px){
  header.topnav{padding:1rem 1.25rem}
  .sec{padding:4rem 1.25rem}
  #hero{padding:0 1.25rem 3rem}
  .about-grid{grid-template-columns:1fr;gap:2.5rem}
  .vid-grid{gap:1.25rem}
  .vid-tile{flex-basis:220px}
  footer{padding:3.5rem 1.25rem 2rem}
}

/* back-to-top */
.back-top{position:fixed;right:1.75rem;bottom:1.75rem;width:46px;height:46px;border-radius:50%;background:var(--orange);color:#000;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:150;opacity:0;pointer-events:none;transform:translateY(12px);transition:opacity .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease)}
.back-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-top:hover{box-shadow:0 8px 20px rgba(255,157,0,.4)}