/* ==========================================================
   Hà Chi B2B Website — Shared Stylesheet
   balotuixachhachi.com
   ========================================================== */

/* AOS Fix */
[data-aos]{opacity:1!important;transform:none!important;transition:opacity .65s ease,transform .65s ease;}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}

:root{
  /* Colors */
  --rust:#C0392B;
  --rust2:#e74c3c;
  --rust-dark:#9b2d23;
  --gold:#C8922A;
  --gold2:#e8a82e;
  --navy:#1E2A3A;
  --navy2:#253545;
  --black:#1A1512;
  --dark:#201d19;
  --dark2:#2a2520;
  --dark3:#342f28;
  --offwhite:#F5F0E8;
  --cream:#EDE8DE;
  --warm:#8A7A68;
  --warm2:#6a5c4e;
  --steel:#D4CDBE;
  --steel2:#b8b0a4;
  --white:#ffffff;
  /* Layout */
  --r:4px;--r2:8px;--r3:12px;
  --border:rgba(255,255,255,0.07);
  --border2:rgba(255,255,255,0.13);
  --border-rust:rgba(192,57,43,0.3);
  --sh:0 4px 20px rgba(0,0,0,.35);
  --sh2:0 12px 48px rgba(0,0,0,.5);
  --sh-rust:0 8px 32px rgba(192,57,43,.22);
  --max:1240px;
  --nav-h:72px;
}

html{scroll-behavior:smooth;}
body{
  font-family:'Be Vietnam Pro',system-ui,sans-serif;
  background:var(--black);color:var(--offwhite);
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
  font-size:16px;line-height:1.6;
}
img{max-width:100%;height:auto;display:block;}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}

/* ── TOPBAR ── */
.topbar{
  background:var(--navy);
  padding:8px 5%;
  display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;
}
.topbar-l{font-size:.75rem;font-weight:600;color:rgba(255,255,255,.6);display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.topbar-l span{display:flex;align-items:center;gap:5px;}
.topbar-r{display:flex;align-items:center;gap:14px;}
.topbar-r a{font-size:.76rem;font-weight:700;color:var(--steel);transition:color .2s;}
.topbar-r a:hover{color:#fff;}
.topbar-r a.hot{color:var(--gold2);}
@media(max-width:640px){.topbar-l{display:none;}}

/* ── NAV ── */
nav#nav{
  position:sticky;top:0;z-index:700;height:var(--nav-h);
  background:rgba(26,21,18,.97);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border2);
}
.nav-inner{
  max-width:var(--max);margin:0 auto;padding:0 5%;
  height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.nav-logo{display:flex;align-items:center;gap:11px;}
.nav-logo-mark{
  width:40px;height:40px;border-radius:var(--r);flex-shrink:0;
  background:var(--rust);
  display:flex;align-items:center;justify-content:center;
  font-family:'Barlow Condensed',sans-serif;font-size:1rem;font-weight:900;color:#fff;letter-spacing:-.02em;
}
.nav-logo-name{font-family:'Barlow Condensed',sans-serif;font-size:1.25rem;font-weight:900;letter-spacing:.03em;text-transform:uppercase;color:var(--offwhite);line-height:1.1;}
.nav-logo-name span{color:var(--rust);}
.nav-logo-sub{font-size:.62rem;font-weight:600;color:var(--warm);letter-spacing:.06em;margin-top:2px;}
.nav-links{display:flex;gap:0;}
.nav-links a{
  padding:8px 13px;font-size:.8rem;font-weight:600;color:var(--warm);
  transition:color .2s;white-space:nowrap;position:relative;
}
.nav-links a:hover,.nav-links a.active{color:var(--offwhite);}
.nav-links a.active::after{content:'';position:absolute;bottom:-1px;left:13px;right:13px;height:2px;background:var(--rust);}
.nav-cta{
  background:var(--rust);color:#fff;
  padding:10px 22px;border-radius:var(--r);
  font-size:.82rem;font-weight:700;white-space:nowrap;
  transition:background .2s,transform .15s;
  display:flex;align-items:center;gap:7px;
}
.nav-cta:hover{background:var(--rust2);transform:translateY(-1px);}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px;background:none;border:none;}
.hamburger span{width:24px;height:2px;background:var(--offwhite);border-radius:1px;transition:transform .3s,opacity .3s;}
.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);}
.mm{display:none;position:fixed;top:var(--nav-h);left:0;right:0;z-index:699;background:var(--dark);border-bottom:1px solid var(--border2);padding:14px 5% 20px;}
.mm.open{display:block;}
.mm a{display:block;padding:12px 0;font-size:.88rem;font-weight:600;color:var(--warm);border-bottom:1px solid var(--border);}
.mm a:hover{color:var(--offwhite);}
.mm-cta{display:block;text-align:center;margin-top:12px;background:var(--rust);color:#fff;padding:14px;border-radius:var(--r);font-weight:700;font-size:.86rem;}
@media(max-width:920px){.nav-links{display:none;}.nav-cta{display:none;}.hamburger{display:flex;}}

/* ── SHARED LAYOUT ── */
.sw{max-width:var(--max);margin:0 auto;}
section{padding:88px 5%;}
.sec-label{
  display:inline-flex;align-items:center;gap:8px;
  font-family:'Barlow Condensed',sans-serif;font-size:.7rem;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:var(--rust);margin-bottom:10px;
}
.sec-label::before{content:'';width:20px;height:2px;background:var(--rust);}
.sec-label.on-light{color:var(--rust-dark);}
.sec-label.on-light::before{background:var(--rust-dark);}
h2.sh{font-family:'Barlow Condensed',sans-serif;font-size:clamp(1.9rem,3.8vw,3rem);font-weight:900;line-height:1.08;letter-spacing:-.01em;text-transform:uppercase;color:var(--offwhite);margin-bottom:10px;}
h2.sh em{font-style:normal;color:var(--rust);}
h2.sh.on-light{color:var(--black);}
h2.sh.on-light em{color:var(--rust);}
.sec-sub{font-size:.9rem;color:var(--warm);line-height:1.85;max-width:540px;}
.sec-sub.on-light{color:var(--warm2);}

/* ── BUTTONS ── */
.btn-primary{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--rust);color:#fff;
  padding:14px 28px;border-radius:var(--r2);
  font-size:.88rem;font-weight:700;
  box-shadow:var(--sh-rust);
  transition:background .2s,transform .15s,box-shadow .2s;
  border:none;cursor:pointer;
}
.btn-primary:hover{background:var(--rust2);transform:translateY(-2px);box-shadow:0 12px 36px rgba(192,57,43,.35);}
.btn-secondary{
  display:inline-flex;align-items:center;gap:7px;
  border:1.5px solid var(--border2);color:var(--warm);
  padding:12px 22px;border-radius:var(--r2);
  font-size:.86rem;font-weight:600;
  transition:border-color .2s,color .2s;background:none;cursor:pointer;
}
.btn-secondary:hover{border-color:var(--rust);color:var(--offwhite);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:7px;
  color:var(--rust);font-size:.84rem;font-weight:700;
  border-bottom:1px solid var(--rust);padding-bottom:2px;
  transition:color .2s,border-color .2s;
}
.btn-ghost:hover{color:var(--gold);border-color:var(--gold);}

/* ── TRUST STRIP ── */
.trust-strip{background:var(--dark2);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:16px 5%;}
.trust-inner{max-width:var(--max);margin:0 auto;display:flex;align-items:center;justify-content:space-evenly;gap:20px;flex-wrap:wrap;}
.ti{display:flex;align-items:center;gap:9px;font-size:.8rem;font-weight:600;color:var(--warm);}
.ti .icon{font-size:1.1rem;}
.ti strong{color:var(--offwhite);}

/* ── STATS ROW ── */
.stats-row{display:flex;gap:0;flex-wrap:wrap;}
.stat-item{flex:1;min-width:130px;border-right:1px solid var(--border);padding:24px 28px;text-align:center;}
.stat-item:last-child{border-right:none;}
.stat-v{font-family:'Barlow Condensed',sans-serif;font-size:2.2rem;font-weight:900;color:var(--offwhite);line-height:1;}
.stat-v span{color:var(--rust);}
.stat-l{font-size:.75rem;color:var(--warm);text-transform:uppercase;letter-spacing:.08em;margin-top:5px;font-weight:600;}

/* ── CARDS ── */
.card{background:var(--dark2);border:1px solid var(--border);border-radius:var(--r2);overflow:hidden;transition:border-color .25s,transform .25s,box-shadow .25s;}
.card:hover{border-color:var(--border-rust);transform:translateY(-4px);box-shadow:var(--sh2);}
.card-img{overflow:hidden;}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s;}
.card:hover .card-img img{transform:scale(1.05);}
.card-body{padding:22px 20px;}
.card-label{font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--warm);margin-bottom:6px;}
.card-title{font-family:'Barlow Condensed',sans-serif;font-size:1.1rem;font-weight:800;text-transform:uppercase;color:var(--offwhite);margin-bottom:7px;}
.card-desc{font-size:.83rem;color:var(--warm);line-height:1.72;}

/* ── BADGE ── */
.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:20px;font-size:.68rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;}
.badge-rust{background:rgba(192,57,43,.15);border:1px solid rgba(192,57,43,.3);color:var(--rust);}
.badge-gold{background:rgba(200,146,42,.12);border:1px solid rgba(200,146,42,.25);color:var(--gold2);}
.badge-navy{background:rgba(30,42,58,.5);border:1px solid rgba(255,255,255,.1);color:var(--steel);}

/* ── PROCESS STEPS ── */
.step-row{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative;margin-top:52px;}
.step-row::before{content:'';position:absolute;top:26px;left:10%;right:10%;height:2px;background:linear-gradient(90deg,var(--rust),var(--gold),var(--rust));opacity:.25;}
.step{text-align:center;padding:0 12px;}
.step-num{width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,var(--rust),var(--rust-dark));display:flex;align-items:center;justify-content:center;font-family:'Barlow Condensed',sans-serif;font-size:1.15rem;font-weight:900;color:#fff;margin:0 auto 16px;position:relative;z-index:1;box-shadow:var(--sh-rust);}
.step-title{font-size:.88rem;font-weight:700;color:var(--offwhite);margin-bottom:6px;}
.step-desc{font-size:.78rem;color:var(--warm);line-height:1.7;}
@media(max-width:700px){.step-row{grid-template-columns:1fr 1fr;gap:28px;}.step-row::before{display:none;}}

/* ── FAQ ── */
.fi{background:var(--dark2);border:1px solid var(--border);border-radius:var(--r);}
.fi.open{border-color:var(--border-rust);}
.fi-q{padding:16px 18px;font-size:.9rem;font-weight:700;color:var(--offwhite);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;user-select:none;}
.fi-icon{width:26px;height:26px;border:1px solid var(--border2);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--warm);flex-shrink:0;transition:transform .25s,background .2s,border-color .2s;}
.fi.open .fi-icon{transform:rotate(45deg);background:var(--rust);border-color:var(--rust);color:#fff;}
.fi-a{max-height:0;overflow:hidden;transition:max-height .35s ease,padding .3s;}
.fi.open .fi-a{max-height:220px;padding-bottom:16px;}
.fi-a p{padding:0 18px;font-size:.86rem;color:var(--warm);line-height:1.82;}

/* ── FOOTER ── */
footer{background:var(--dark);border-top:1px solid var(--border);padding:56px 5% 24px;}
.ft-grid{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:2.2fr 1fr 1fr 1fr;gap:48px;margin-bottom:44px;}
.ft-brand{font-family:'Barlow Condensed',sans-serif;font-size:1.35rem;font-weight:900;letter-spacing:.04em;text-transform:uppercase;color:var(--offwhite);margin-bottom:10px;}
.ft-brand span{color:var(--rust);}
.ft-domain{font-size:.65rem;color:var(--warm);margin-bottom:12px;letter-spacing:.05em;}
.ft-desc{font-size:.82rem;color:var(--warm2);line-height:1.78;max-width:220px;margin-bottom:16px;}
.ft-social{display:flex;gap:8px;}
.fts{width:34px;height:34px;border:1px solid var(--border2);border-radius:var(--r);display:flex;align-items:center;justify-content:center;color:var(--warm2);font-size:.78rem;font-weight:700;transition:border-color .2s,color .2s;}
.fts:hover{border-color:var(--rust);color:var(--rust);}
.ft-col-title{font-size:.65rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--warm2);margin-bottom:14px;}
.ft-links{display:flex;flex-direction:column;gap:9px;}
.ft-links a{font-size:.83rem;color:var(--warm2);transition:color .2s;display:flex;align-items:center;gap:5px;}
.ft-links a:hover{color:var(--offwhite);}
.ft-bottom{max-width:var(--max);margin:0 auto;border-top:1px solid var(--border);padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;}
.ft-bottom-l{font-size:.72rem;color:var(--warm2);}
.ft-bottom-r{display:flex;gap:14px;}
.ft-bottom-r a{font-size:.72rem;color:var(--warm2);transition:color .2s;}
.ft-bottom-r a:hover{color:var(--offwhite);}
@media(max-width:820px){.ft-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:480px){.ft-grid{grid-template-columns:1fr;}}

/* ── MOBILE FLOAT BAR ── */
.float-bar{position:fixed;bottom:0;left:0;right:0;z-index:400;background:rgba(26,21,18,.97);border-top:1px solid var(--border2);backdrop-filter:blur(12px);padding:11px 16px;display:none;align-items:center;justify-content:space-between;gap:10px;}
.fb-info{font-size:.8rem;font-weight:600;color:var(--warm);}
.fb-info strong{color:var(--gold2);display:block;font-size:.86rem;}
.fb-btns{display:flex;gap:8px;flex-shrink:0;}
.fb-zalo{background:rgba(0,104,255,.13);border:1.5px solid rgba(0,104,255,.35);color:#6eb0ff;padding:9px 14px;border-radius:var(--r);font-size:.78rem;font-weight:700;}
.fb-call{background:var(--rust);color:#fff;padding:9px 16px;border-radius:var(--r);font-size:.78rem;font-weight:700;}
@media(max-width:768px){.float-bar{display:flex;}}

/* ── SCROLL PROGRESS / BACK TO TOP ── */
.sp{position:fixed;top:0;left:0;z-index:800;height:3px;background:var(--rust);transition:width .1s;pointer-events:none;}
.btt{position:fixed;bottom:80px;right:18px;z-index:400;width:40px;height:40px;background:var(--rust);color:#fff;font-size:1rem;display:none;align-items:center;justify-content:center;border-radius:var(--r);box-shadow:var(--sh-rust);transition:transform .2s;}
.btt:hover{transform:translateY(-2px);}
.btt.vis{display:flex;}

/* ── SECTION BG VARIANTS ── */
.bg-black{background:var(--black);}
.bg-dark{background:var(--dark);}
.bg-dark2{background:var(--dark2);}
.bg-navy{background:var(--navy);}
.bg-offwhite{background:var(--offwhite);}
.bg-cream{background:var(--cream);}

/* ── GRID HELPERS ── */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:32px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
@media(max-width:900px){.grid-4{grid-template-columns:1fr 1fr;}.grid-3{grid-template-columns:1fr 1fr;}}
@media(max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}}

/* ── CHECKLIST ── */
.checklist{display:flex;flex-direction:column;gap:10px;}
.checklist li{display:flex;align-items:flex-start;gap:9px;font-size:.87rem;color:var(--warm);line-height:1.6;}
.checklist li::before{content:'✓';color:var(--rust);font-weight:700;flex-shrink:0;margin-top:2px;}
.checklist li strong{color:var(--offwhite);}

/* ── LIGHT SECTION overrides ── */
.light-section{background:var(--offwhite);}
.light-section .sec-sub{color:var(--warm2);}
.light-section .card{background:#fff;border-color:rgba(0,0,0,.07);}
.light-section .card:hover{border-color:rgba(192,57,43,.35);}
.light-section .card-label{color:var(--warm2);}
.light-section .card-title{color:var(--black);}
.light-section .card-desc{color:var(--warm2);}

/* ── ACTIVE page highlight ── */
.page-hero-label{font-family:'Barlow Condensed',sans-serif;font-size:.72rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--rust);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.page-hero-label::before{content:'';width:24px;height:2px;background:var(--rust);}