/* ============================================================
   PHAN DŨNG — thiết kế website
   Palette: indigo #1E1B4B · violet #7C3AED · ngà #FAFAFA · than #4B5563
   Type: Bricolage Grotesque (display) / Be Vietnam Pro (body) / Unbounded (nhãn)
   ============================================================ */

:root{
  --void:#07061A;
  --void-2:#0D0B26;
  --indigo:#1E1B4B;
  --indigo-lift:#2A2666;
  --violet:#7C3AED;
  --violet-hi:#A78BFA;
  --violet-deep:#4C1D95;
  --ivory:#FAFAFA;
  --slate:#4B5563;

  --ink:#FAFAFA;
  --ink-2:rgba(250,250,250,.66);
  --ink-3:rgba(250,250,250,.40);
  --line:rgba(167,139,250,.16);

  --f-display:"Bricolage Grotesque","Be Vietnam Pro",system-ui,sans-serif;
  --f-body:"Be Vietnam Pro",system-ui,-apple-system,sans-serif;
  --f-util:"Unbounded","Be Vietnam Pro",system-ui,sans-serif;

  --wrap:1240px;
  --r:20px;
  --ease:cubic-bezier(.22,1,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--void);
  color:var(--ink);
  font-family:var(--f-body);
  font-weight:300;
  font-size:17px;
  line-height:1.72;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3{margin:0;font-family:var(--f-display);font-weight:700;line-height:1.04;letter-spacing:-.03em}
p{margin:0}
em{font-style:normal}

:focus-visible{outline:2px solid var(--violet-hi);outline-offset:4px;border-radius:6px}

.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--violet);color:#fff;padding:12px 20px;border-radius:0 0 10px 0}
.skip:focus{left:0}

.wrap{width:min(100% - 44px,var(--wrap));margin-inline:auto}
.wrap--narrow{width:min(100% - 44px,820px)}

/* grain + ambient ---------------------------------------- */
.grain{
  position:fixed;inset:0;z-index:120;pointer-events:none;opacity:.30;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* typography scale --------------------------------------- */
h1{font-size:clamp(2.5rem,6.4vw,4.75rem);font-variation-settings:"opsz" 96,"wdth" 92}
h2{font-size:clamp(1.95rem,3.9vw,3.15rem);font-variation-settings:"opsz" 72,"wdth" 94}
h3{font-size:clamp(1.15rem,1.7vw,1.4rem);font-weight:600;letter-spacing:-.02em}
h1 em,h2 em{
  background:linear-gradient(96deg,var(--violet-hi) 6%,#E9D5FF 52%,var(--violet-hi) 96%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.eyebrow{
  font-family:var(--f-util);font-size:.62rem;font-weight:500;
  letter-spacing:.26em;text-transform:uppercase;color:var(--violet-hi);
  margin-bottom:22px;display:flex;align-items:center;gap:12px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,transparent,var(--violet-hi));flex:none}

/* buttons ------------------------------------------------- */
.btn{
  --btn-bg:transparent;
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--f-body);font-size:.95rem;font-weight:500;letter-spacing:-.01em;
  padding:16px 30px;border-radius:999px;border:1px solid transparent;
  position:relative;isolation:isolate;cursor:pointer;
  transition:transform .45s var(--ease),box-shadow .45s var(--ease),background .3s,color .3s,border-color .3s;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--sm{padding:11px 22px;font-size:.86rem}
.btn--lg{padding:19px 38px;font-size:1.02rem}
.btn--full{width:100%;margin-top:28px}

.btn--primary{background:linear-gradient(180deg,#8B5CF6,#6D28D9);color:#fff;border-color:rgba(167,139,250,.55)}
.btn--primary:hover{background:linear-gradient(180deg,#9B72F8,#7C3AED)}
.btn--glow{box-shadow:0 10px 30px -12px rgba(124,58,237,.9),0 0 0 1px rgba(167,139,250,.28) inset,0 0 46px -18px var(--violet-hi)}
.btn--glow:hover{box-shadow:0 18px 44px -14px rgba(124,58,237,1),0 0 0 1px rgba(167,139,250,.5) inset,0 0 70px -14px var(--violet-hi)}
.btn--glow::after{
  content:"";position:absolute;inset:-1px;border-radius:inherit;z-index:-1;
  background:conic-gradient(from 180deg,transparent 0deg,rgba(167,139,250,.85) 60deg,transparent 140deg,transparent 360deg);
  opacity:0;transition:opacity .5s;
}
.btn--glow:hover::after{opacity:.8;animation:spin 3.4s linear infinite}
@keyframes spin{to{transform:rotate(1turn)}}

.btn--ghost{color:var(--ink);border-color:rgba(167,139,250,.28);background:rgba(167,139,250,.05)}
.btn--ghost:hover{border-color:rgba(167,139,250,.6);background:rgba(167,139,250,.12)}
.btn--dark{background:var(--indigo);color:#fff;border-color:rgba(30,27,75,.9)}
.btn--dark:hover{background:var(--indigo-lift);box-shadow:0 14px 34px -18px rgba(30,27,75,.9)}

/* nav ----------------------------------------------------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .4s,backdrop-filter .4s,border-color .4s}
.nav::after{content:"";position:absolute;inset:0;border-bottom:1px solid transparent;transition:border-color .4s;pointer-events:none}
.nav.is-stuck{background:rgba(7,6,26,.72);backdrop-filter:blur(18px) saturate(140%)}
.nav.is-stuck::after{border-bottom-color:var(--line)}
.nav__inner{width:min(100% - 44px,var(--wrap));margin-inline:auto;display:flex;align-items:center;gap:28px;height:78px}

.mark{display:flex;align-items:center;gap:12px;margin-right:auto}
.mark__glyph{display:flex;gap:3px;align-items:flex-end;height:19px}
.mark__glyph i{display:block;width:3px;border-radius:2px;background:var(--violet-hi);box-shadow:0 0 12px var(--violet)}
.mark__glyph i:nth-child(1){height:9px;opacity:.5}
.mark__glyph i:nth-child(2){height:15px;opacity:.75}
.mark__glyph i:nth-child(3){height:19px}
.mark__name{font-family:var(--f-display);font-weight:700;font-size:1.06rem;letter-spacing:-.02em}

.nav__links{display:flex;gap:30px}
.nav__links a{font-size:.9rem;color:var(--ink-2);position:relative;padding:6px 0;transition:color .3s}
.nav__links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--violet-hi);transition:width .4s var(--ease)}
.nav__links a:hover{color:var(--ink)}
.nav__links a:hover::after{width:100%}

.nav__toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:rgba(167,139,250,.06);flex-direction:column;gap:5px;align-items:center;justify-content:center;cursor:pointer}
.nav__toggle span{width:17px;height:1.5px;background:var(--ink);border-radius:2px;transition:transform .35s var(--ease),opacity .3s}
.nav__toggle[aria-expanded="true"] span:first-child{transform:translateY(3.2px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] span:last-child{transform:translateY(-3.2px) rotate(-45deg)}
.nav__mobile{display:none;flex-direction:column;padding:8px 22px 26px;background:rgba(7,6,26,.96);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav__mobile a{padding:14px 0;border-bottom:1px solid rgba(167,139,250,.08);color:var(--ink-2);font-size:.98rem}
.nav__mobile-cta{margin-top:18px;border:0!important;background:linear-gradient(180deg,#8B5CF6,#6D28D9);color:#fff!important;text-align:center;border-radius:999px;padding:15px 0!important}

/* ============ HERO ============ */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding:132px 0 96px;overflow:hidden}
.hero__atmos{
  position:absolute;inset:-10% -5% auto;height:120%;
  background:url("assets/hero-atmos.jpg") center/cover no-repeat;
  opacity:.42;filter:saturate(.85) brightness(.62);
  mask-image:radial-gradient(120% 90% at 62% 34%,#000 12%,transparent 78%);
  -webkit-mask-image:radial-gradient(120% 90% at 62% 34%,#000 12%,transparent 78%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(90% 60% at 50% 108%,rgba(124,58,237,.20),transparent 62%),
    linear-gradient(180deg,var(--void) 0%,rgba(7,6,26,.35) 34%,var(--void) 97%);
}
.hero__halo{
  position:absolute;width:720px;height:720px;right:-8%;top:6%;pointer-events:none;
  background:radial-gradient(circle,rgba(124,58,237,.34),transparent 66%);
  filter:blur(46px);animation:drift 15s ease-in-out infinite alternate;
}
@keyframes drift{to{transform:translate3d(-40px,34px,0) scale(1.09)}}

.hero__grid{position:relative;z-index:2;display:grid;grid-template-columns:1.04fr .96fr;gap:56px;align-items:center}
.hero__sub{color:var(--ink-2);font-size:1.09rem;max-width:34em;margin-top:26px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:40px}
.hero__facts{display:flex;flex-wrap:wrap;gap:38px;margin:56px 0 0;padding-top:30px;border-top:1px solid var(--line)}
.hero__facts dt{font-family:var(--f-util);font-size:.56rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);margin-bottom:9px}
.hero__facts dd{margin:0;font-family:var(--f-display);font-size:1.22rem;font-weight:600;letter-spacing:-.02em}
.hero__facts dd span{font-family:var(--f-body);font-size:.72rem;font-weight:400;color:var(--ink-3);margin-left:3px}

.hero__scroll{
  position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:3;
  font-family:var(--f-util);font-size:.55rem;letter-spacing:.24em;text-transform:uppercase;color:var(--ink-3);
  display:flex;flex-direction:column;align-items:center;gap:10px;
}
.hero__scroll span{width:1px;height:42px;background:linear-gradient(180deg,transparent,var(--violet-hi));animation:fall 2.2s ease-in-out infinite}
@keyframes fall{0%{transform:scaleY(.2);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(.2);transform-origin:bottom}}

/* ---- 3D stage ---- */
.stage{perspective:1500px;perspective-origin:58% 44%}
.stage__scene{
  position:relative;width:100%;aspect-ratio:1/.92;transform-style:preserve-3d;
  transform:rotateX(calc(6deg + var(--my,0)*-5deg)) rotateY(calc(-20deg + var(--mx,0)*7deg));
  transition:transform .9s var(--ease);
}
.pane{
  position:absolute;transform-style:preserve-3d;border-radius:16px;
  border:1px solid rgba(167,139,250,.34);
  background:linear-gradient(150deg,rgba(76,29,149,.32),rgba(13,11,38,.72));
  backdrop-filter:blur(8px);
  box-shadow:0 0 0 1px rgba(255,255,255,.05) inset,0 30px 70px -34px rgba(0,0,0,.9),0 0 60px -26px var(--violet);
  padding:20px;
  animation:float 9s ease-in-out infinite;
}
.pane--3{width:66%;left:26%;top:2%;transform:translateZ(-190px);opacity:.62;animation-delay:-1.2s}
.pane--2{width:70%;left:16%;top:20%;transform:translateZ(-90px);opacity:.82;animation-delay:-3.4s}
.pane--1{width:86%;left:0;top:40%;transform:translateZ(40px);padding:0;background:linear-gradient(160deg,rgba(30,27,75,.96),rgba(10,8,30,.98));border-color:rgba(167,139,250,.5);box-shadow:0 0 0 1px rgba(255,255,255,.06) inset,0 44px 90px -40px #000,0 0 90px -30px var(--violet)}
@keyframes float{50%{translate:0 -12px}}

.pane__tag{font-family:var(--f-util);font-size:.5rem;letter-spacing:.2em;text-transform:uppercase;color:var(--violet-hi);display:block;margin-bottom:16px}
.pane__lines{display:flex;flex-direction:column;gap:9px}
.pane__lines i{height:7px;border-radius:4px;background:linear-gradient(90deg,rgba(167,139,250,.5),rgba(167,139,250,.08))}
.pane__wire{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.pane__wire i{height:26px;border-radius:6px;border:1px solid rgba(167,139,250,.26);background:rgba(167,139,250,.07)}
.pane__wire i:first-child{grid-column:1/-1;height:34px}

.browser{border-radius:15px;overflow:hidden}
.browser__bar{display:flex;align-items:center;gap:6px;padding:12px 14px;background:rgba(255,255,255,.05);border-bottom:1px solid rgba(167,139,250,.2)}
.browser__bar i{width:7px;height:7px;border-radius:50%;background:rgba(167,139,250,.35)}
.browser__url{margin-left:12px;font-size:.6rem;color:var(--ink-3);letter-spacing:.02em;font-family:var(--f-body)}
.browser__body{padding:0;background:#0A0822}

/* trang web thu nhỏ bên trong khung trình duyệt */
.browser{font-size:clamp(10px,2.6vw,15px)}
.msite-hero{position:relative;aspect-ratio:16/6.4;overflow:hidden}
.msite-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.msite-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(8,6,26,.95) 4%,rgba(8,6,26,.62) 44%,rgba(8,6,26,.05) 78%);
}
.msite-copy{position:relative;z-index:1;padding:1.5em 0 0 1.5em;max-width:70%}
.msite-eyebrow{
  display:block;font-family:var(--f-util);font-size:.46em;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;color:var(--violet-hi);margin-bottom:.7em;
}
.msite-title{
  font-family:var(--f-display);font-weight:700;font-size:1.02em;line-height:1.2;
  letter-spacing:-.025em;color:#fff;text-shadow:0 2px 14px rgba(8,6,26,.8);
}
.msite-btn{
  display:inline-block;margin-top:1em;font-family:var(--f-body);font-size:.52em;font-weight:500;
  color:#fff;padding:.85em 2em;border-radius:999px;
  background:linear-gradient(180deg,#8B5CF6,#6D28D9);
  box-shadow:0 0 1.6em -.3em var(--violet);animation:pulseBtn 2.8s ease-in-out infinite;
}
@keyframes pulseBtn{50%{box-shadow:0 0 2.8em -.1em var(--violet-hi)}}

.msite-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.7em;padding:1.1em 1.5em 1.5em}
.msite-card{margin:0;border-radius:.5em;overflow:hidden;border:1px solid rgba(167,139,250,.2);background:rgba(255,255,255,.04)}
.msite-card img{width:100%;aspect-ratio:16/9;object-fit:cover;opacity:.9}
.msite-card figcaption{
  font-family:var(--f-body);font-size:.44em;color:var(--ink-2);
  padding:.85em 1em;letter-spacing:.02em;
}

/* vệt sáng lướt qua khung trình duyệt */
.browser{position:relative}
.browser::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:2;
  background:linear-gradient(112deg,transparent 40%,rgba(255,255,255,.09) 49%,transparent 58%);
  transform:translateX(-70%);animation:sheen 7s ease-in-out infinite;
}
@keyframes sheen{0%,74%{transform:translateX(-70%)}100%{transform:translateX(70%)}}

.stage__floor{
  position:absolute;left:-12%;right:-12%;bottom:-14%;height:38%;
  background:radial-gradient(60% 100% at 50% 0%,rgba(124,58,237,.36),transparent 70%);
  filter:blur(26px);transform:translateZ(-160px) rotateX(72deg);
}

/* ============ SECTION SHELL ============ */
.sec{position:relative;padding:clamp(92px,11.5vw,172px) 0}
.sec__head{max-width:44rem;margin-bottom:clamp(48px,6vw,76px)}
.sec__head--center{margin-inline:auto;text-align:center}
.sec__head--center .eyebrow{justify-content:center}
.sec__lead{color:var(--ink-2);font-size:1.05rem;margin-top:24px}

/* ============ VẤN ĐỀ ============ */
.sec--problem{background:linear-gradient(180deg,var(--void),var(--void-2) 50%,var(--void))}
.sec--problem::before{
  content:"";position:absolute;left:-10%;top:22%;width:520px;height:520px;pointer-events:none;
  background:radial-gradient(circle,rgba(124,58,237,.18),transparent 68%);filter:blur(40px);
}
.split{display:grid;grid-template-columns:1fr 1fr;gap:24px;position:relative;z-index:1}
.card{border-radius:var(--r);padding:40px 38px;border:1px solid var(--line);transition:transform .6s var(--ease),box-shadow .6s var(--ease),border-color .5s}
.card--dim{background:linear-gradient(160deg,rgba(30,27,75,.36),rgba(13,11,38,.5))}
.card--lit{
  background:linear-gradient(160deg,rgba(76,29,149,.4),rgba(13,11,38,.72));
  border-color:rgba(167,139,250,.34);
  box-shadow:0 0 70px -34px var(--violet);
}
.card:hover{transform:translateY(-5px)}
.card--lit:hover{box-shadow:0 0 90px -26px var(--violet);border-color:rgba(167,139,250,.6)}
.card__kicker{font-family:var(--f-util);font-size:.58rem;letter-spacing:.2em;text-transform:uppercase;color:var(--violet-hi);margin-bottom:26px}
.card--dim .card__kicker{color:var(--ink-3)}
.ticks li{position:relative;padding-left:32px;margin-bottom:16px;color:var(--ink-2);font-size:1rem}
.ticks li:last-child{margin-bottom:0}
.ticks li::before{
  content:"";position:absolute;left:0;top:.62em;width:14px;height:14px;border-radius:50%;
  border:1px solid var(--violet-hi);background:radial-gradient(circle,var(--violet) 20%,transparent 60%);
  box-shadow:0 0 14px -2px var(--violet);
}
.ticks--off li::before{border-color:rgba(250,250,250,.2);background:none;box-shadow:none}
.ticks--off li{color:var(--ink-3)}

.quote{margin:72px auto 0;max-width:40rem;text-align:center;position:relative;z-index:1}
.quote p{
  font-family:var(--f-display);font-weight:500;font-size:clamp(1.25rem,2.5vw,1.9rem);
  line-height:1.36;letter-spacing:-.025em;color:var(--ink);
}
.quote::before{content:"";display:block;width:1px;height:52px;margin:0 auto 32px;background:linear-gradient(180deg,transparent,var(--violet-hi))}

/* ============ GÓI DỊCH VỤ (nền sáng) ============ */
.sec--light{background:var(--ivory);color:var(--indigo)}
.sec--light h2{color:var(--indigo)}
.sec--light h2 em{background:none;-webkit-text-fill-color:var(--violet);color:var(--violet)}
.sec--light .eyebrow{color:var(--violet)}
.sec--light .eyebrow::before{background:linear-gradient(90deg,transparent,var(--violet))}
.sec--light .sec__lead{color:var(--slate)}

.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.tier{
  background:#fff;border:1px solid rgba(75,85,99,.16);border-radius:var(--r);padding:38px 34px 34px;
  display:flex;flex-direction:column;
  box-shadow:0 18px 40px -34px rgba(30,27,75,.5);
  transition:transform .6s var(--ease),box-shadow .6s var(--ease),border-color .5s;
}
.tier:hover{transform:translateY(-8px);box-shadow:0 34px 60px -38px rgba(30,27,75,.65);border-color:rgba(124,58,237,.4)}
.tier--feature{
  background:linear-gradient(168deg,#241F5E,#151233 62%);border-color:rgba(124,58,237,.6);
  color:var(--ivory);padding-top:46px;position:relative;
  box-shadow:0 30px 70px -38px rgba(76,29,149,.9),0 0 60px -32px var(--violet);
}
.tier--feature:hover{box-shadow:0 40px 84px -36px rgba(76,29,149,1),0 0 90px -28px var(--violet)}
.tier__flag{
  position:absolute;top:20px;left:34px;
  font-family:var(--f-util);font-size:.5rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--violet-hi);
}
.tier__name{font-family:var(--f-display);font-weight:700;font-size:1.42rem;letter-spacing:-.03em}
.tier__for{color:var(--slate);font-size:.92rem;margin-top:10px;min-height:3.2em}
.tier--feature .tier__for{color:var(--ink-2)}
.tier__price{
  font-family:var(--f-display);font-weight:800;font-size:2.3rem;letter-spacing:-.045em;
  margin-top:26px;line-height:1;
}
.tier--feature .tier__price{color:#fff;text-shadow:0 0 40px rgba(167,139,250,.6)}
.tier__price span{font-family:var(--f-util);font-size:.58rem;font-weight:400;letter-spacing:.14em;margin-left:8px;vertical-align:middle;color:var(--slate)}
.tier--feature .tier__price span{color:var(--violet-hi)}
.tier__time{font-size:.85rem;color:var(--violet);margin-top:12px;font-weight:500}
.tier--feature .tier__time{color:var(--violet-hi)}
.tier__list{margin-top:28px;padding-top:26px;border-top:1px solid rgba(75,85,99,.14);flex:1}
.tier--feature .tier__list{border-top-color:rgba(167,139,250,.22)}
.tier__list li{position:relative;padding-left:26px;margin-bottom:13px;font-size:.94rem;color:var(--slate)}
.tier--feature .tier__list li{color:var(--ink-2)}
.tier__list li::before{
  content:"";position:absolute;left:0;top:.64em;width:9px;height:9px;border-radius:3px;
  background:var(--violet);opacity:.55;
}
.tier--feature .tier__list li::before{background:var(--violet-hi);opacity:1;box-shadow:0 0 12px -1px var(--violet-hi)}
.tiers__note{text-align:center;margin-top:44px;color:var(--slate);font-size:.95rem}

/* ============ DỰ ÁN ============ */
.sec--work{background:linear-gradient(180deg,var(--void),var(--void-2))}
.works{display:flex;flex-direction:column;gap:clamp(48px,6vw,88px)}
.work{display:grid;grid-template-columns:1.06fr .94fr;gap:clamp(28px,4vw,60px);align-items:center}
.work--flip .work__media{order:2}
.work__media{
  position:relative;border-radius:var(--r);overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 40px 80px -50px #000,0 0 70px -40px var(--violet);
  transform:perspective(1200px) rotateY(4deg);
  transition:transform .8s var(--ease),box-shadow .8s var(--ease);
}
.work--flip .work__media{transform:perspective(1200px) rotateY(-4deg)}
.work__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(124,58,237,.16),transparent 46%,rgba(7,6,26,.5));
  transition:opacity .6s;
}
.work:hover .work__media{transform:perspective(1200px) rotateY(0deg) translateY(-6px);box-shadow:0 50px 90px -48px #000,0 0 110px -34px var(--violet)}
.work:hover .work__media::after{opacity:.55}
.work__type{font-family:var(--f-util);font-size:.54rem;letter-spacing:.2em;text-transform:uppercase;color:var(--violet-hi);margin-bottom:16px}
.work h3{font-size:clamp(1.5rem,2.6vw,2.05rem);font-weight:700;margin-bottom:22px}
.work__prob,.work__sol{color:var(--ink-2);font-size:1rem;margin-bottom:16px}
.work__prob span,.work__sol span{
  display:block;font-family:var(--f-util);font-size:.5rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:6px;
}
.work__sol{color:var(--ink);padding-left:18px;border-left:1px solid rgba(167,139,250,.3);margin-bottom:0}

/* ============ QUY TRÌNH ============ */
.sec--flow{background:var(--void)}
.sec--flow::before{
  content:"";position:absolute;right:-6%;top:14%;width:560px;height:560px;pointer-events:none;
  background:radial-gradient(circle,rgba(124,58,237,.16),transparent 68%);filter:blur(50px);
}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;z-index:1}
.flow::before{
  content:"";position:absolute;left:6%;right:6%;top:26px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(167,139,250,.4),rgba(167,139,250,.4),transparent);
}
.flow__step{position:relative;padding-top:0}
.flow__num{
  display:flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:50%;margin-bottom:28px;
  font-family:var(--f-util);font-size:.74rem;font-weight:500;letter-spacing:.02em;
  color:var(--violet-hi);background:var(--void);
  border:1px solid rgba(167,139,250,.4);
  box-shadow:0 0 34px -10px var(--violet),0 0 0 6px var(--void);
  position:relative;z-index:1;transition:box-shadow .5s,color .4s,background .4s;
}
.flow__step:hover .flow__num{color:#fff;background:linear-gradient(180deg,#8B5CF6,#6D28D9);box-shadow:0 0 50px -8px var(--violet),0 0 0 6px var(--void)}
.flow__step h3{margin-bottom:14px}
.flow__step p{color:var(--ink-2);font-size:.95rem}

/* ============ CAM KẾT ============ */
.sec--promise{background:linear-gradient(180deg,var(--void),var(--void-2) 60%,var(--void))}
.promise{display:grid;grid-template-columns:.92fr 1.08fr;gap:clamp(36px,5vw,76px);align-items:center}
.promise__media{
  border-radius:var(--r);overflow:hidden;border:1px solid var(--line);position:relative;
  box-shadow:0 40px 80px -50px #000,0 0 80px -44px var(--violet);
}
.promise__media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,6,26,.1),rgba(7,6,26,.55))}
.promise__media img{aspect-ratio:4/3.4;object-fit:cover}
.promise__item{padding:26px 0;border-top:1px solid var(--line)}
.promise__item:first-of-type{margin-top:36px}
.promise__item h3{margin-bottom:10px;color:var(--ink)}
.promise__item p{color:var(--ink-2);font-size:1rem}
.promise__extra{margin-top:18px;padding-top:26px;border-top:1px solid var(--line)}
.promise__extra-title{font-family:var(--f-util);font-size:.54rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);margin-bottom:18px}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips li{
  font-size:.85rem;color:var(--ink-2);padding:9px 18px;border-radius:999px;
  border:1px solid rgba(167,139,250,.22);background:rgba(167,139,250,.06);transition:border-color .4s,color .3s,background .3s;
}
.chips li:hover{border-color:rgba(167,139,250,.55);color:var(--ink);background:rgba(167,139,250,.12)}

/* ============ FAQ ============ */
.sec--faq{background:var(--void)}
.qa{border-bottom:1px solid var(--line)}
.qa summary{
  list-style:none;cursor:pointer;padding:26px 44px 26px 0;position:relative;
  font-family:var(--f-display);font-weight:600;font-size:1.08rem;letter-spacing:-.02em;
  transition:color .3s;
}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{
  content:"";position:absolute;right:6px;top:50%;width:11px;height:11px;
  border-right:1.5px solid var(--violet-hi);border-bottom:1.5px solid var(--violet-hi);
  transform:translateY(-70%) rotate(45deg);transition:transform .45s var(--ease);
}
.qa[open] summary::after{transform:translateY(-20%) rotate(-135deg)}
.qa summary:hover{color:var(--violet-hi)}
.qa__body{padding:0 44px 28px 0;color:var(--ink-2);font-size:1rem;animation:fadeIn .5s var(--ease)}
@keyframes fadeIn{from{opacity:0;transform:translateY(-6px)}}

/* ============ CTA CUỐI ============ */
.sec--final{background:var(--void);text-align:center;overflow:hidden;padding-bottom:clamp(110px,13vw,190px)}
.final__glow{
  position:absolute;left:50%;top:34%;transform:translate(-50%,-50%);
  width:min(1100px,120vw);height:640px;pointer-events:none;
  background:radial-gradient(50% 50% at 50% 50%,rgba(124,58,237,.42),transparent 68%);
  filter:blur(52px);animation:breathe 7s ease-in-out infinite alternate;
}
@keyframes breathe{to{opacity:.62;transform:translate(-50%,-50%) scale(1.08)}}
.final{position:relative;z-index:1}
.final .eyebrow{justify-content:center}
.final h2{font-size:clamp(2rem,4.6vw,3.5rem)}
.final__sub{color:var(--ink-2);font-size:1.08rem;margin:26px auto 0;max-width:36em}
.final__cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:44px}
.final__mail{margin-top:30px;color:var(--ink-3);font-size:.94rem}
.final__mail a{color:var(--violet-hi);border-bottom:1px solid rgba(167,139,250,.34);padding-bottom:2px}
.final__mail a:hover{border-bottom-color:var(--violet-hi)}

/* ============ FOOTER ============ */
.foot{background:var(--void-2);border-top:1px solid var(--line);padding:76px 0 0}
.foot__inner{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;padding-bottom:56px}
.foot__brand .mark__glyph{margin-bottom:18px}
.foot__name{font-family:var(--f-display);font-weight:700;font-size:1.3rem;letter-spacing:-.03em}
.foot__slogan{color:var(--ink-2);margin-top:10px;max-width:26em;font-size:.98rem}
.foot__cols{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.foot__cols a{display:block;color:var(--ink-2);font-size:.93rem;padding:6px 0;transition:color .3s}
.foot__cols a:hover{color:var(--violet-hi)}
.foot__label{font-family:var(--f-util);font-size:.54rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);margin-bottom:14px}
.foot__base{border-top:1px solid var(--line);padding:26px 0 34px}
.foot__base p{color:var(--ink-3);font-size:.82rem}

/* ============ NÚT ZALO NỔI ============ */
.dock{
  position:fixed;right:22px;bottom:22px;z-index:110;
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 26px;border-radius:999px;font-size:.92rem;font-weight:500;color:#fff;
  background:linear-gradient(180deg,#8B5CF6,#6D28D9);
  border:1px solid rgba(167,139,250,.5);
  box-shadow:0 16px 40px -16px rgba(124,58,237,.95),0 0 50px -20px var(--violet-hi);
  transform:translateY(120%);opacity:0;
  transition:transform .6s var(--ease),opacity .5s,box-shadow .4s;
}
.dock.is-on{transform:translateY(0);opacity:1}
.dock:hover{box-shadow:0 22px 54px -14px rgba(124,58,237,1),0 0 70px -14px var(--violet-hi)}
.dock__pulse{width:9px;height:9px;border-radius:50%;background:#fff;box-shadow:0 0 0 0 rgba(255,255,255,.6);animation:ping 2.2s ease-out infinite}
@keyframes ping{70%{box-shadow:0 0 0 12px rgba(255,255,255,0)}100%{box-shadow:0 0 0 0 rgba(255,255,255,0)}}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease) var(--d,0s),transform .9s var(--ease) var(--d,0s)}
.reveal.is-in{opacity:1;transform:none}

/* ============ RESPONSIVE ============ */
@media (max-width:1100px){
  .hero__grid{grid-template-columns:1fr;gap:64px}
  .stage{max-width:520px;margin-inline:auto;width:100%}
  .hero{padding-top:120px}
  .flow{grid-template-columns:repeat(2,1fr);gap:40px 24px}
  .flow::before{display:none}
  .promise{grid-template-columns:1fr}
  .promise__media img{aspect-ratio:16/9}
}
@media (max-width:900px){
  .nav__links,.nav__cta{display:none}
  .nav__toggle{display:flex}
  .nav.is-open{background:rgba(7,6,26,.96)}
  .nav__mobile{display:flex}
  .tiers{grid-template-columns:1fr;max-width:480px;margin-inline:auto}
  .tier--feature{order:-1}
  .work,.work--flip{grid-template-columns:1fr;gap:28px}
  .work--flip .work__media{order:0}
  .work__media,.work--flip .work__media{transform:none}
  .work:hover .work__media{transform:translateY(-4px)}
  .split{grid-template-columns:1fr}
  .foot__inner{grid-template-columns:1fr;gap:44px}
}
@media (max-width:620px){
  body{font-size:16px}
  .wrap,.wrap--narrow,.nav__inner{width:calc(100% - 34px)}
  .hero{padding:112px 0 84px}
  .hero__facts{gap:24px 30px;margin-top:44px}
  .hero__scroll{display:none}
  .card{padding:32px 26px}
  .tier{padding:32px 26px 30px}
  .flow{grid-template-columns:1fr;gap:34px}
  .quote{margin-top:52px}
  .dock{right:14px;bottom:14px;padding:13px 22px;font-size:.86rem}
  .foot__cols{grid-template-columns:1fr}
}

/* ============ GIẢM CHUYỂN ĐỘNG ============ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
  .stage__scene{transform:rotateX(4deg) rotateY(-14deg)}
}

/* ============ SỬA CHI TIẾT ============ */
.nav__mobile[hidden]{display:none}
section[id],main[id]{scroll-margin-top:96px}
.hero__grid,.sec .wrap{position:relative;z-index:1}
.tiers{align-items:stretch}
.hero__atmos{opacity:.5}
.promise__media img{filter:brightness(1.28) saturate(1.06)}
.promise__media::after{background:linear-gradient(180deg,rgba(7,6,26,.05),rgba(7,6,26,.42))}
@media (max-width:620px){.br-wide{display:none}}

/* ---- ảnh đại diện thay cho logo chữ ---- */
.mark__avatar{
  display:block;width:40px;height:40px;flex:none;border-radius:50%;overflow:hidden;
  border:1px solid rgba(167,139,250,.5);
  box-shadow:0 0 24px -8px var(--violet),0 0 0 3px rgba(124,58,237,.14);
  transition:box-shadow .45s var(--ease),transform .45s var(--ease);
}
.mark:hover .mark__avatar{box-shadow:0 0 34px -6px var(--violet),0 0 0 3px rgba(124,58,237,.26);transform:translateY(-1px)}
.mark__avatar img{width:100%;height:100%;object-fit:cover;object-position:center 22%}
.foot__brand .mark__avatar{width:56px;height:56px;margin-bottom:18px}
.mark__glyph{display:none}
.no-avatar .mark__glyph{display:flex}
.no-avatar .mark__avatar{display:none}
.mark__avatar img{object-position:center;transform:scale(1.5);transform-origin:50% 12%}

/* ---- icon phát sáng cho từng bước quy trình ---- */
.flow__num{margin-bottom:22px}
.flow__num svg{width:23px;height:23px;filter:drop-shadow(0 0 7px rgba(124,58,237,.85));transition:filter .5s var(--ease)}
.flow__step:hover .flow__num svg{filter:drop-shadow(0 0 13px var(--violet-hi))}
.flow__label{
  font-family:var(--f-util);font-size:.52rem;font-weight:500;letter-spacing:.22em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:10px;transition:color .4s;
}
.flow__step:hover .flow__label{color:var(--violet-hi)}
.flow__num svg{width:25px;height:25px;filter:drop-shadow(0 0 9px rgba(124,58,237,.95))}
.pane--3{opacity:.72}
.pane--2{opacity:.88}
.pane__lines i{background:linear-gradient(90deg,rgba(167,139,250,.62),rgba(167,139,250,.12))}
.pane__wire i{border-color:rgba(167,139,250,.34);background:rgba(167,139,250,.09)}
.msite-card figcaption{font-size:.5em}
.msite-eyebrow{font-size:.5em}

/* ============ TƯƠNG TÁC KHỐI 3D THEO CON TRỎ ============ */
.stage__scene{transition:transform .5s var(--ease)}

/* mỗi lớp kính nhô về phía người xem khi rê chuột vào */
.pane{
  transform:translateZ(calc(var(--z,0px) + var(--lift,0px)));
  transition:transform .55s var(--ease),box-shadow .55s var(--ease),
             border-color .45s,opacity .45s;
}
.pane--3{--z:-190px}
.pane--2{--z:-90px}
.pane--1{--z:40px}
.pane:hover{--lift:54px;border-color:rgba(167,139,250,.78);opacity:1}
.pane--3:hover,.pane--2:hover{
  box-shadow:0 0 0 1px rgba(255,255,255,.08) inset,0 34px 76px -32px #000,0 0 90px -22px var(--violet);
}
.pane--1:hover{
  box-shadow:0 0 0 1px rgba(255,255,255,.10) inset,0 52px 100px -38px #000,0 0 130px -24px var(--violet);
}

/* vệt sáng bám theo con trỏ bên trong khung trình duyệt */
.browser__glow{
  position:absolute;inset:0;z-index:3;pointer-events:none;opacity:0;
  mix-blend-mode:screen;
  background:radial-gradient(170px 170px at var(--gx,50%) var(--gy,50%),rgba(167,139,250,.34),transparent 66%);
  transition:opacity .45s var(--ease);
}
.browser:hover .browser__glow{opacity:1}

/* ba ô dự án nhỏ: nhấc lên và phát sáng */
.msite-card{transition:transform .5s var(--ease),box-shadow .5s var(--ease),border-color .4s}
.msite-card img{transition:transform .85s var(--ease),opacity .4s}
.msite-card figcaption{transition:color .35s}
.msite-card:hover{
  transform:translateY(-.3em) scale(1.045);
  border-color:rgba(167,139,250,.8);
  box-shadow:0 .7em 1.5em -.5em rgba(0,0,0,.85),0 0 1.8em -.25em var(--violet-hi);
}
.msite-card:hover img{transform:scale(1.09);opacity:1}
.msite-card:hover figcaption{color:var(--violet-hi)}

@media (prefers-reduced-motion:reduce){
  .pane:hover{--lift:0px}
  .msite-card:hover{transform:none}
}
.browser__glow{background:radial-gradient(150px 150px at var(--gx,50%) var(--gy,50%),rgba(167,139,250,.26),transparent 64%)}

/* ---- icon trong cột chân trang ---- */
.foot__cols a{
  display:flex;align-items:center;gap:11px;
  transition:color .3s,transform .45s var(--ease);
}
.foot__cols a .fico{
  width:16px;height:16px;flex:none;color:var(--ink-3);
  transition:color .35s,transform .45s var(--ease),filter .45s var(--ease);
}
.foot__cols a:hover{color:var(--violet-hi);transform:translateX(5px)}
.foot__cols a:hover .fico{
  color:var(--violet-hi);transform:scale(1.16);
  filter:drop-shadow(0 0 8px var(--violet));
}
.foot__cols a:focus-visible .fico{color:var(--violet-hi);filter:drop-shadow(0 0 8px var(--violet))}
@media (prefers-reduced-motion:reduce){
  .foot__cols a:hover{transform:none}
  .foot__cols a:hover .fico{transform:none}
}

/* ---- dịch vụ thêm: bấm vào mở mô tả và báo giá ---- */
.chips li{padding:0;border:0;background:none}
.chip{
  font-family:var(--f-body);font-size:.85rem;font-weight:400;color:var(--ink-2);
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 18px;border-radius:999px;cursor:pointer;
  border:1px solid rgba(167,139,250,.22);background:rgba(167,139,250,.06);
  transition:border-color .4s,color .3s,background .3s,box-shadow .4s var(--ease),transform .4s var(--ease);
}
.chip::after{
  content:"";width:6px;height:6px;flex:none;opacity:.55;
  border-right:1.4px solid currentColor;border-bottom:1.4px solid currentColor;
  transform:rotate(45deg) translateY(-1px);
  transition:transform .4s var(--ease),opacity .3s;
}
.chip:hover{border-color:rgba(167,139,250,.55);color:var(--ink);background:rgba(167,139,250,.12);transform:translateY(-1px)}
.chip[aria-expanded="true"]{
  background:linear-gradient(180deg,#8B5CF6,#6D28D9);color:#fff;
  border-color:rgba(167,139,250,.6);box-shadow:0 0 28px -8px var(--violet);
}
.chip[aria-expanded="true"]::after{transform:rotate(-135deg) translateY(2px);opacity:1}

.addon{
  margin-top:20px;padding:26px 26px 22px;border-radius:16px;
  border:1px solid rgba(167,139,250,.3);
  background:linear-gradient(160deg,rgba(76,29,149,.34),rgba(13,11,38,.74));
  box-shadow:0 0 70px -34px var(--violet);
  animation:addonIn .45s var(--ease);
}
@keyframes addonIn{from{opacity:0;transform:translateY(-8px)}}
.addon__name{font-size:1.12rem;margin-bottom:13px}
.addon__desc{color:var(--ink-2);font-size:.97rem}
.addon__foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  margin-top:22px;padding-top:20px;border-top:1px solid var(--line);
}
.addon__price{font-family:var(--f-display);font-weight:600;font-size:1.04rem;letter-spacing:-.02em;color:var(--ink)}
.addon__price span{display:block;font-family:var(--f-body);font-weight:300;font-size:.79rem;color:var(--ink-3);margin-top:5px;letter-spacing:0}
@media (prefers-reduced-motion:reduce){
  .addon{animation:none}
  .chip:hover{transform:none}
}

/* ---- giá dịch vụ thêm + danh sách trong FAQ ---- */
.addon__price i{font-family:var(--f-util);font-style:normal;font-size:.56rem;font-weight:400;letter-spacing:.12em;color:var(--violet-hi);margin-left:6px;vertical-align:middle}
.qa__list{margin-top:16px;padding-top:16px;border-top:1px solid var(--line)}
.qa__list li{position:relative;padding-left:24px;margin-bottom:9px;font-size:.95rem;color:var(--ink-2)}
.qa__list li:last-child{margin-bottom:0}
.qa__list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:3px;
  background:var(--violet-hi);box-shadow:0 0 10px -1px var(--violet-hi);
}

/* ---- ảnh chụp website thật: khung trình duyệt + bớt lớp phủ ---- */
.work__media{background:#0A0822}
.work__bar{
  display:flex;align-items:center;gap:6px;
  padding:11px 14px;background:rgba(255,255,255,.05);
  border-bottom:1px solid rgba(167,139,250,.2);
}
.work__bar i{width:7px;height:7px;border-radius:50%;background:rgba(167,139,250,.38)}
.work__media::after{
  background:linear-gradient(200deg,rgba(124,58,237,.10),transparent 40%,rgba(7,6,26,.30));
}
.work:hover .work__media::after{opacity:.4}


/* ---- ảnh dự án: chiều cao tự nhiên nên luôn thấy trọn tấm ---- */
.work__media img{
  width:100%;height:auto;aspect-ratio:auto;
  object-fit:contain;
  padding:10px;background:#0A0822;
  transition:filter .6s var(--ease);
}
.work:hover .work__media img{transform:none;filter:brightness(1.06)}

/* ---- hai lớp kính sau: phát sáng đồng bộ với khung trình duyệt ---- */
.pane{
  border-color:rgba(167,139,250,.5);
  background:linear-gradient(150deg,rgba(124,58,237,.30),rgba(20,16,58,.66));
  box-shadow:
    0 0 0 1px rgba(167,139,250,.20) inset,
    0 0 26px -4px rgba(124,58,237,.55),
    0 0 80px -22px var(--violet),
    0 30px 70px -34px rgba(0,0,0,.9);
}
.pane--3{opacity:.88}
.pane--2{opacity:.96}
/* vệt sáng chạy dọc mép trên, như ánh sáng viền tấm kính */
.pane--3::before,.pane--2::before{
  content:"";position:absolute;left:10%;right:10%;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,var(--violet-hi),transparent);
  box-shadow:0 0 10px 1px rgba(167,139,250,.7);
}
.pane__tag{color:#C4B5FD;text-shadow:0 0 14px rgba(167,139,250,.75)}
.pane__lines i{
  background:linear-gradient(90deg,rgba(196,181,253,.85),rgba(167,139,250,.18));
  box-shadow:0 0 12px -2px rgba(167,139,250,.65);
}
.pane__wire i{
  border-color:rgba(167,139,250,.55);
  background:rgba(167,139,250,.13);
  box-shadow:0 0 16px -6px rgba(167,139,250,.8) inset,0 0 14px -8px var(--violet-hi);
}

/* dịch vụ thêm: chỉ còn dòng giá, không còn nút */
.addon__foot{justify-content:flex-start}
/* nhãn hero dài hơn: co lại trên màn hình hẹp để không tràn */
@media (max-width:620px){
  .hero .eyebrow{font-size:.54rem;letter-spacing:.18em}
}