/* =============================================
   VINATECH – CORE DESIGN SYSTEM
   ============================================= */
:root {
    --blue-dark: #0d2c6e;
    --blue-mid: #1a4dbf;
    --blue-light: #2c87d9;
    --cyan: #00c6e0;
    --orange: #f07c23;
    --orange-hover: #d96a18;
    --white: #ffffff;
    --off-white: #f4f8fd;
    --gray-light: #e6edf7;
    --gray-mid: #8a9ab5;
    --gray-dark: #444e60;
    --text: #1a2340;
    --shadow-sm: 0 2px 12px rgba(13,44,110,.08);
    --shadow-md: 0 8px 32px rgba(13,44,110,.13);
    --shadow-lg: 0 16px 48px rgba(13,44,110,.2);
    --radius: 14px;
    --radius-lg: 22px;
    --transition: all .3s cubic-bezier(.4,0,.2,1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Be Vietnam Pro', sans-serif; color: var(--text); background: var(--white); overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.section-head { margin-bottom: 3.5rem; }
.section-head.center { text-align: center; }
.section-tag { display: inline-flex; align-items: center; gap: 6px; font-size: .75rem; font-weight: 700; letter-spacing: .12em; color: var(--blue-mid); background: rgba(44,135,217,.1); padding: 5px 14px; border-radius: 50px; margin-bottom: .8rem; text-transform: uppercase; }
.section-title { font-family: 'Montserrat', sans-serif; font-size: clamp(1.7rem,3.2vw,2.5rem); font-weight: 800; line-height: 1.25; color: var(--blue-dark); margin-bottom: 1rem; }
.section-sub { font-size: 1.05rem; color: var(--gray-dark); max-width: 640px; line-height: 1.7; }
.section-head.center .section-sub { margin: 0 auto; }

/* BUTTONS */
.btn { display: inline-flex; align-items: center; gap: 9px; padding: 14px 28px; border-radius: 50px; font-weight: 700; font-size: .95rem; cursor: pointer; border: none; transition: var(--transition); white-space: nowrap; }
.btn-primary { background: linear-gradient(135deg, var(--blue-mid), var(--blue-light)); color: var(--white); box-shadow: 0 4px 20px rgba(26,77,191,.35); }
.btn-primary:hover { background: linear-gradient(135deg, var(--blue-dark), var(--blue-mid)); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(26,77,191,.45); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,.7); }
.btn-outline:hover { background: var(--white); color: var(--blue-dark); }
.btn-outline-dark { background: transparent; color: var(--blue-dark); border: 2px solid var(--blue-mid); }
.btn-outline-dark:hover { background: var(--blue-dark); color: var(--white); }
.btn.full { width: 100%; justify-content: center; }

/* TOPBAR */
.topbar { background: var(--blue-dark); color: rgba(255,255,255,.85); font-size: .82rem; padding: 7px 0; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.topbar-left { display: flex; gap: 22px; }
.topbar-left span { display: flex; align-items: center; gap: 6px; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.topbar-right a { color: rgba(255,255,255,.85); transition: var(--transition); }
.topbar-right a:hover { color: var(--cyan); }

/* HEADER */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: var(--white); box-shadow: var(--shadow-sm); transition: var(--transition); padding: 0; }
.header.scrolled { top: 0; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; gap: 24px; }
.logo-wrap { display: flex; align-items: center; }
.logo-img { height: 52px; width: auto; }

/* NAV */
.navbar { flex: 1; display: flex; justify-content: center; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-link { font-size: .9rem; font-weight: 600; color: var(--gray-dark); padding: 8px 14px; border-radius: 8px; transition: var(--transition); display: flex; align-items: center; gap: 5px; }
.nav-link:hover, .nav-link.active { color: var(--blue-mid); background: rgba(44,135,217,.08); }
.dropdown { position: relative; }
.dropdown-menu { position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%); background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 8px; min-width: 260px; opacity: 0; visibility: hidden; transition: var(--transition); pointer-events: none; border-top: 3px solid var(--blue-mid); }
.dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; pointer-events: auto; top: calc(100% + 4px); }
.dropdown-menu li a { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 8px; font-size: .9rem; font-weight: 500; transition: var(--transition); }
.dropdown-menu li a i { width: 18px; color: var(--blue-mid); }
.dropdown-menu li a:hover { background: var(--off-white); color: var(--blue-mid); }
.btn-hotline { display: flex; align-items: center; gap: 10px; background: linear-gradient(135deg, var(--blue-mid), var(--cyan)); color: var(--white); padding: 9px 18px; border-radius: 50px; transition: var(--transition); }
.btn-hotline:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.hotline-icon { width: 36px; height: 36px; background: rgba(255,255,255,.2); border-radius: 50%; display: flex; align-items: center; justify-content: center; animation: pulse-ring 2s infinite; }
.hotline-text { display: flex; flex-direction: column; }
.hotline-label { font-size: .7rem; opacity: .85; line-height: 1; }
.hotline-number { font-weight: 800; font-size: .95rem; line-height: 1.4; }
@keyframes pulse-ring { 0%,100% { box-shadow: 0 0 0 0 rgba(255,255,255,.4); } 50% { box-shadow: 0 0 0 8px rgba(255,255,255,0); } }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; background: none; border: none; }
.mobile-toggle span { width: 26px; height: 2.5px; background: var(--blue-dark); border-radius: 2px; transition: var(--transition); }
.header-cta { display: flex; align-items: center; gap: 12px; }

/* HERO */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding-top: calc(74px + 36px); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(110deg, rgba(13,44,110,.92) 0%, rgba(13,44,110,.75) 50%, rgba(0,198,224,.3) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 760px; padding: 4rem 0 5rem; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(240,124,35,.15); border: 1px solid rgba(240,124,35,.4); color: #f9c16e; padding: 8px 18px; border-radius: 50px; font-size: .78rem; font-weight: 700; letter-spacing: .1em; margin-bottom: 1.5rem; }
.hero-title { font-family: 'Montserrat', sans-serif; font-size: clamp(2.4rem,5vw,3.8rem); font-weight: 900; color: var(--white); line-height: 1.15; margin-bottom: 1.5rem; }
.gradient-text { background: linear-gradient(135deg, var(--cyan), #7edff5); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: 1.1rem; color: rgba(255,255,255,.88); line-height: 1.8; margin-bottom: 2rem; }
.hero-desc strong { color: var(--cyan); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 3.5rem; }
.hero-stats { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.stat-num { font-family: 'Montserrat', sans-serif; font-size: 2.2rem; font-weight: 900; color: var(--white); }
.stat-plus { font-size: 1.4rem; font-weight: 900; color: var(--cyan); }
.stat-lbl { display: block; font-size: .78rem; color: rgba(255,255,255,.7); font-weight: 500; max-width: 120px; }
.hero-stat-divider { width: 1px; height: 48px; background: rgba(255,255,255,.2); }
.hero-scroll-hint { position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 6px; color: rgba(255,255,255,.6); font-size: .78rem; z-index: 2; animation: bounce 2s infinite; }
.scroll-arrow { width: 34px; height: 34px; border: 2px solid rgba(255,255,255,.3); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
@keyframes bounce { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

/* PARTNERS MARQUEE SECTION */
.partners-section { padding: 48px 0 0; background: var(--white); border-bottom: 1px solid var(--gray-light); overflow: hidden; }
.partners-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.6rem; flex-wrap: wrap; gap: 10px; }
.partners-label { display: inline-flex; align-items: center; gap: 9px; font-size: .78rem; font-weight: 700; letter-spacing: .1em; color: var(--blue-mid); text-transform: uppercase; }
.partners-label i { font-size: 1rem; color: var(--orange); }
.partners-sub { font-size: .84rem; color: var(--gray-mid); }

/* Marquee track */
.marquee-wrap { position: relative; overflow: hidden; padding: 16px 0 44px; }
.marquee-wrap::before, .marquee-wrap::after { content: ''; position: absolute; top: 0; bottom: 0; width: 120px; z-index: 2; pointer-events: none; }
.marquee-wrap::before { left: 0; background: linear-gradient(to right, var(--white), transparent); }
.marquee-wrap::after { right: 0; background: linear-gradient(to left, var(--white), transparent); }
.marquee-track { display: flex; gap: 16px; width: max-content; animation: marquee-scroll 36s linear infinite; }
.marquee-track:hover { animation-play-state: paused; }
@keyframes marquee-scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* Partner logo card */
.partner-logo-item { display: flex; align-items: center; gap: 12px; background: var(--off-white); border: 1.5px solid var(--gray-light); border-radius: 50px; padding: 10px 20px 10px 10px; white-space: nowrap; transition: var(--transition); cursor: default; flex-shrink: 0; }
.partner-logo-item:hover { border-color: var(--blue-light); box-shadow: var(--shadow-sm); transform: translateY(-2px); background: var(--white); }
.partner-logo-item span { font-size: .88rem; font-weight: 700; color: var(--gray-dark); }

/* Color-coded industry icon circles */
.plc { width: 38px; height: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: .95rem; flex-shrink: 0; }
.plc.food    { background: rgba(234,88,12,.12); color: #ea580c; }
.plc.retail  { background: rgba(14,165,233,.12); color: #0ea5e9; }
.plc.bank    { background: rgba(22,163,74,.12);  color: #16a34a; }
.plc.ecom    { background: rgba(220,38,38,.12);  color: #dc2626; }
.plc.kcn     { background: rgba(109,40,217,.12); color: #6d28d9; }
.plc.medical { background: rgba(20,184,166,.12); color: #14b8a6; }
.plc.textile { background: rgba(236,72,153,.12); color: #ec4899; }

/* SERVICES */
.services-section { padding: 100px 0; background: var(--white); }
.services-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.service-card { background: var(--off-white); border-radius: var(--radius-lg); padding: 36px 32px; border: 1px solid var(--gray-light); transition: var(--transition); position: relative; overflow: hidden; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--blue-mid), var(--cyan)); transform: scaleX(0); transition: var(--transition); }
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-card.featured { grid-column: 1 / -1; display: grid; grid-template-columns: auto 1fr; gap: 0 32px; align-content: start; background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-mid) 100%); color: var(--white); border-color: transparent; }
.service-card.featured h3 { color: var(--white); }
.service-card.featured p { color: rgba(255,255,255,.82); }
.service-card.featured .svc-list li { color: rgba(255,255,255,.85); }
.service-card.featured .svc-link { color: var(--cyan); }
.service-card.featured .svc-link:hover { color: var(--white); }
.service-card.featured .svc-icon-wrap { background: rgba(255,255,255,.15); grid-row: 1 / 6; }
.svc-tag { display: inline-block; background: rgba(240,124,35,.2); color: var(--orange); font-size: .72rem; font-weight: 700; letter-spacing: .08em; padding: 3px 12px; border-radius: 50px; margin-bottom: .5rem; text-transform: uppercase; }
.svc-icon-wrap { width: 64px; height: 64px; background: linear-gradient(135deg, rgba(44,135,217,.12), rgba(0,198,224,.12)); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.7rem; color: var(--blue-mid); margin-bottom: 1.2rem; flex-shrink: 0; }
.service-card h3 { font-size: 1.18rem; font-weight: 700; color: var(--blue-dark); margin-bottom: .8rem; }
.service-card p { font-size: .92rem; color: var(--gray-dark); line-height: 1.7; margin-bottom: 1rem; }
.svc-list { margin-bottom: 1.4rem; }
.svc-list li { display: flex; align-items: center; gap: 8px; font-size: .88rem; font-weight: 500; color: var(--gray-dark); margin-bottom: 5px; }
.svc-list li i { color: var(--blue-light); font-size: .8rem; }
.svc-link { font-size: .9rem; font-weight: 700; color: var(--blue-mid); display: inline-flex; align-items: center; gap: 6px; transition: var(--transition); }
.svc-link i { transition: transform .25s; }
.svc-link:hover i { transform: translateX(5px); }
.svc-link:hover { color: var(--blue-dark); }

/* ABOUT */
.about-section { padding: 100px 0; background: var(--off-white); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-img-side { position: relative; }
.about-img-main { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-img-main img { width: 100%; height: 480px; object-fit: cover; }
.about-img-badge { position: absolute; bottom: -24px; left: -24px; background: linear-gradient(135deg, var(--blue-mid), var(--cyan)); color: var(--white); border-radius: var(--radius); padding: 20px 24px; text-align: center; box-shadow: var(--shadow-md); }
.badge-number { font-family: 'Montserrat', sans-serif; font-size: 2.8rem; font-weight: 900; line-height: 1; }
.badge-text { font-size: .8rem; opacity: .9; margin-top: 4px; line-height: 1.4; }
.about-cert { position: absolute; top: 24px; right: -20px; background: var(--white); border-radius: var(--radius); padding: 14px 20px; box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 10px; font-size: .82rem; font-weight: 600; color: var(--blue-dark); }
.about-cert i { color: var(--orange); font-size: 1.3rem; }
.about-desc { font-size: .98rem; color: var(--gray-dark); line-height: 1.8; margin-bottom: 1rem; }
.about-points { display: flex; flex-direction: column; gap: 16px; margin: 2rem 0; }
.about-point { display: flex; gap: 16px; align-items: flex-start; }
.point-icon { width: 44px; height: 44px; background: linear-gradient(135deg, var(--blue-mid), var(--cyan)); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--white); font-size: 1rem; flex-shrink: 0; }
.about-point strong { display: block; font-size: .95rem; font-weight: 700; color: var(--blue-dark); margin-bottom: 3px; }
.about-point span { font-size: .88rem; color: var(--gray-dark); line-height: 1.6; }

/* INDUSTRIES */
.industries-section { padding: 100px 0; background: var(--white); }
.industries-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.industry-card { border-radius: var(--radius-lg); overflow: hidden; background: var(--white); border: 1px solid var(--gray-light); transition: var(--transition); }
.industry-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.ind-img { position: relative; height: 220px; overflow: hidden; }
.ind-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.industry-card:hover .ind-img img { transform: scale(1.08); }
.ind-overlay { position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 30%, rgba(13,44,110,.85)); display: flex; align-items: flex-end; justify-content: flex-start; padding: 16px; opacity: 0; transition: var(--transition); }
.industry-card:hover .ind-overlay { opacity: 1; }
.ind-cta { color: var(--white); font-size: .85rem; font-weight: 700; display: flex; align-items: center; gap: 6px; background: var(--blue-mid); padding: 8px 16px; border-radius: 50px; }
.ind-info { padding: 20px; }
.ind-icon { width: 40px; height: 40px; background: linear-gradient(135deg, rgba(44,135,217,.12), rgba(0,198,224,.12)); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; color: var(--blue-mid); margin-bottom: .8rem; }
.ind-info h3 { font-size: 1rem; font-weight: 700; color: var(--blue-dark); margin-bottom: .4rem; }
.ind-info p { font-size: .83rem; color: var(--gray-dark); line-height: 1.6; margin-bottom: .8rem; }
.ind-tag { display: inline-block; background: rgba(44,135,217,.1); color: var(--blue-mid); font-size: .74rem; font-weight: 700; padding: 3px 12px; border-radius: 50px; }

/* WHY US */
.why-section { padding: 100px 0; background: var(--off-white); }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 3rem; }
.why-card { background: var(--white); border-radius: var(--radius-lg); padding: 36px 28px; border: 1px solid var(--gray-light); position: relative; overflow: hidden; transition: var(--transition); }
.why-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.why-card.highlight { background: linear-gradient(135deg, var(--blue-dark), var(--blue-mid)); color: var(--white); border-color: transparent; }
.why-card.highlight h3 { color: var(--white); }
.why-card.highlight p { color: rgba(255,255,255,.82); }
.why-card.highlight .why-num { color: rgba(255,255,255,.15); }
.why-card.highlight .why-icon { background: rgba(255,255,255,.15); color: var(--cyan); }
.why-num { position: absolute; top: 20px; right: 24px; font-family: 'Montserrat', sans-serif; font-size: 4rem; font-weight: 900; color: rgba(13,44,110,.06); line-height: 1; }
.why-icon { width: 56px; height: 56px; background: linear-gradient(135deg, rgba(44,135,217,.1), rgba(0,198,224,.1)); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: var(--blue-mid); margin-bottom: 1.2rem; }
.why-card h3 { font-size: 1.08rem; font-weight: 700; color: var(--blue-dark); margin-bottom: .7rem; }
.why-card p { font-size: .9rem; color: var(--gray-dark); line-height: 1.75; }
.why-card p strong { color: var(--blue-mid); }
.why-card.highlight p strong { color: var(--cyan); }

/* PROJECTS */
.projects-section { padding: 100px 0; background: var(--white); }
.projects-filter { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 2.5rem; justify-content: center; }
.filter-btn { padding: 8px 22px; border-radius: 50px; border: 1px solid var(--gray-light); background: var(--white); font-size: .88rem; font-weight: 600; color: var(--gray-dark); cursor: pointer; transition: var(--transition); }
.filter-btn.active, .filter-btn:hover { background: var(--blue-dark); color: var(--white); border-color: var(--blue-dark); }
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 2.5rem; }
.proj-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--gray-light); transition: var(--transition); }
.proj-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-5px); border-color: transparent; }
.proj-card.large { grid-column: span 2; display: grid; grid-template-columns: 1.2fr 1fr; }
.proj-img { position: relative; height: 240px; overflow: hidden; }
.proj-card.large .proj-img { height: 100%; }
.proj-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.proj-card:hover .proj-img img { transform: scale(1.05); }
.proj-badge { position: absolute; top: 14px; left: 14px; background: var(--blue-mid); color: var(--white); font-size: .74rem; font-weight: 700; padding: 4px 14px; border-radius: 50px; }
.proj-info { padding: 24px; }
.proj-info h3 { font-size: 1.05rem; font-weight: 700; color: var(--blue-dark); margin-bottom: .6rem; }
.proj-meta { display: flex; gap: 16px; margin-bottom: .8rem; flex-wrap: wrap; }
.proj-meta span { font-size: .8rem; font-weight: 600; color: var(--blue-mid); display: flex; align-items: center; gap: 5px; }
.proj-info p { font-size: .87rem; color: var(--gray-dark); line-height: 1.65; }
.projects-cta { text-align: center; }

/* CALCULATOR */
.calc-section { padding: 90px 0; background: linear-gradient(135deg, var(--blue-dark) 0%, #0a1f55 100%); }
.calc-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.calc-benefits { display: flex; flex-direction: column; gap: 12px; }
.calc-benefits li { display: flex; align-items: center; gap: 12px; font-size: .95rem; color: rgba(255,255,255,.88); }
.calc-benefits li i { color: var(--cyan); font-size: 1.1rem; }
.calc-form { background: var(--white); border-radius: var(--radius-lg); padding: 36px 32px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; color: var(--blue-dark); margin-bottom: 7px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 16px; border: 1.5px solid var(--gray-light); border-radius: 10px; font-size: .92rem; font-family: inherit; color: var(--text); background: var(--off-white); transition: var(--transition); outline: none; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--blue-mid); background: var(--white); box-shadow: 0 0 0 3px rgba(44,135,217,.12); }
.calc-result { background: linear-gradient(135deg, rgba(44,135,217,.08), rgba(0,198,224,.08)); border: 1.5px solid rgba(44,135,217,.25); border-radius: 10px; padding: 16px 20px; margin-bottom: 18px; }
.result-title { font-size: .82rem; font-weight: 600; color: var(--gray-dark); margin-bottom: 4px; }
.result-range { font-family: 'Montserrat', sans-serif; font-size: 1.5rem; font-weight: 800; color: var(--blue-dark); }
.result-note { font-size: .76rem; color: var(--gray-mid); margin-top: 6px; }
.form-note { font-size: .78rem; color: var(--gray-mid); text-align: center; margin-top: 12px; display: flex; align-items: center; justify-content: center; gap: 5px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* CONTACT */
.contact-section { padding: 100px 0; background: var(--off-white); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-info-card { background: var(--white); border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow-sm); border: 1px solid var(--gray-light); margin-bottom: 20px; }
.contact-info-card h3 { font-size: 1.2rem; font-weight: 700; color: var(--blue-dark); margin-bottom: 1.4rem; }
.contact-item { display: flex; gap: 14px; margin-bottom: 18px; align-items: flex-start; }
.ci-icon { width: 40px; height: 40px; background: linear-gradient(135deg, rgba(44,135,217,.1), rgba(0,198,224,.1)); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--blue-mid); font-size: 1rem; flex-shrink: 0; }
.contact-item strong { display: block; font-size: .82rem; font-weight: 700; color: var(--blue-dark); margin-bottom: 2px; }
.contact-item span, .contact-item a { font-size: .9rem; color: var(--gray-dark); line-height: 1.5; }
.contact-item a:hover { color: var(--blue-mid); }
.contact-map iframe { width: 100%; height: 200px; border-radius: var(--radius); border: none; }
.contact-form-side { background: var(--white); border-radius: var(--radius-lg); padding: 36px 32px; box-shadow: var(--shadow-sm); border: 1px solid var(--gray-light); }
.contact-form-side h3 { font-size: 1.2rem; font-weight: 700; color: var(--blue-dark); margin-bottom: 1.4rem; }

/* FOOTER */
.footer { background: var(--blue-dark); color: rgba(255,255,255,.78); padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-logo { height: 52px; margin-bottom: 1rem; background: #fff; border-radius: 10px; padding: 6px 14px; }
.footer-brand p { font-size: .88rem; line-height: 1.75; max-width: 300px; }
.footer-socials { display: flex; gap: 10px; margin-top: 1rem; }
.footer-socials a { width: 38px; height: 38px; background: rgba(255,255,255,.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: var(--transition); }
.footer-socials a:hover { background: var(--blue-mid); transform: translateY(-3px); }
.footer-cert { margin-top: 14px; font-size: .8rem; display: flex; align-items: center; gap: 6px; color: rgba(255,255,255,.5); }
.footer-cert i { color: var(--orange); }
.footer-col h4 { font-size: .92rem; font-weight: 700; color: var(--white); margin-bottom: 1.2rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a { font-size: .87rem; color: rgba(255,255,255,.7); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--cyan); padding-left: 4px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 8px; font-size: .87rem; color: rgba(255,255,255,.7); margin-bottom: 10px; }
.footer-contact li i { color: var(--cyan); margin-top: 3px; flex-shrink: 0; }
.footer-contact li a:hover { color: var(--cyan); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.07); padding: 20px 0; }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-bottom p { font-size: .82rem; color: rgba(255,255,255,.5); }

/* FLOATING */
.floating-actions { position: fixed; right: 24px; bottom: 28px; display: flex; flex-direction: column; gap: 12px; z-index: 900; }
.float-btn { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; cursor: pointer; transition: var(--transition); position: relative; border: none; }
.float-btn:hover { transform: scale(1.12); }
.float-tooltip { position: absolute; right: calc(100% + 12px); background: var(--blue-dark); color: var(--white); font-size: .78rem; font-weight: 600; padding: 5px 12px; border-radius: 8px; white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity .25s; }
.float-btn:hover .float-tooltip { opacity: 1; }
.float-btn.phone { background: linear-gradient(135deg, var(--blue-mid), var(--cyan)); color: var(--white); box-shadow: 0 4px 18px rgba(26,77,191,.4); animation: pulse-float 2.5s infinite; }
@keyframes pulse-float { 0%,100% { box-shadow: 0 4px 18px rgba(26,77,191,.4); } 50% { box-shadow: 0 4px 28px rgba(26,77,191,.7); } }
.float-btn.zalo { background: linear-gradient(135deg, #00aaff, #00ccff); color: var(--white); box-shadow: 0 4px 18px rgba(0,170,255,.35); }
.float-btn.scroll-top { background: var(--blue-dark); color: var(--white); box-shadow: var(--shadow-sm); }

/* ANIMATIONS */
@keyframes fadeUp { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { animation: fadeUp .65s ease both; }
.fade-up-1 { animation-delay: .1s; }
.fade-up-2 { animation-delay: .2s; }
.fade-up-3 { animation-delay: .3s; }

/* RESPONSIVE */
@media (max-width: 1080px) {
    .industries-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
    .about-grid { grid-template-columns: 1fr; gap: 48px; }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .calc-wrap { grid-template-columns: 1fr; gap: 36px; }
    .contact-grid { grid-template-columns: 1fr; }
    .proj-card.large { grid-column: span 1; grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: 1fr; }
    .service-card.featured { grid-template-columns: 1fr; }
    .service-card.featured .svc-icon-wrap { grid-row: auto; }
    .topbar { display: none; }
}
@media (max-width: 768px) {
    .navbar { position: fixed; inset: 74px 0 0; background: var(--white); flex-direction: column; padding: 32px 24px; transform: translateX(-100%); transition: transform .3s; z-index: 999; overflow-y: auto; }
    .navbar.open { transform: translateX(0); }
    .nav-list { flex-direction: column; align-items: flex-start; width: 100%; gap: 4px; }
    .nav-link { width: 100%; font-size: 1rem; padding: 12px 16px; }
    .dropdown-menu { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; border: none; padding: 0 0 0 16px; }
    .mobile-toggle { display: flex; }
    .btn-hotline .hotline-text { display: none; }
    .btn-hotline { padding: 9px; }
    .hotline-icon { width: 38px; height: 38px; }
    .industries-grid { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .hero-stats { gap: 16px; }
    .hero-stat-divider { display: none; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom-inner { flex-direction: column; text-align: center; }
    .about-cert { right: 10px; top: 10px; }
    .about-img-badge { left: 10px; bottom: -16px; }
}
@media (max-width: 420px) {
    .hero-title { font-size: 2rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { text-align: center; justify-content: center; }
    .calc-form { padding: 24px 18px; }
    .contact-form-side { padding: 24px 18px; }
}