/* ===========================================================
   THANG MÁY DUY TÂM — Design System
   Theme: Navy + Azure + accent Vàng đồng. Motif "giếng thang" dọc.
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Brand palette */
    --navy:        #0A1F44;
    --navy-2:      #0E2A5C;
    --azure:       #0056B3;
    --azure-bright:#1E88FF;
    --steel:       #C9D6E3;
    --mist:        #EAF1F8;
    --paper:       #F5F8FC;
    --white:       #FFFFFF;
    --ink:         #0B1B33;
    --muted:       #5A6B82;
    --line:        #DCE6F1;
    --amber:       #F5A623;
    --amber-2:     #FF8A00;

    --grad-hero:   linear-gradient(135deg, #0A1F44 0%, #0E2A5C 45%, #0056B3 100%);
    --grad-azure:  linear-gradient(135deg, #0056B3 0%, #1E88FF 100%);
    --grad-amber:  linear-gradient(135deg, #FF8A00 0%, #F5A623 100%);

    --shadow-sm:   0 4px 14px rgba(10, 31, 68, .08);
    --shadow-md:   0 12px 34px rgba(10, 31, 68, .12);
    --shadow-lg:   0 24px 60px rgba(10, 31, 68, .18);

    --r-sm: 12px;
    --r-md: 18px;
    --r-lg: 28px;

    --ease: cubic-bezier(.22, 1, .36, 1);
    --t:    .35s var(--ease);

    --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Be Vietnam Pro', system-ui, sans-serif;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 22px;
}

/* ---- Scroll progress "floor indicator" ---- */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px; width: 0;
    background: var(--grad-amber);
    z-index: 2000;
    transition: width .12s linear;
}

/* ============================ BUTTONS ============================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: var(--t);
    line-height: 1;
    white-space: nowrap;
}
.btn i { font-size: 14px; }

.btn-primary {
    background: var(--grad-amber);
    color: #2a1500;
    box-shadow: 0 10px 26px rgba(245, 166, 35, .35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(245, 166, 35, .45); }

.btn-azure {
    background: var(--grad-azure);
    color: #fff;
    box-shadow: 0 10px 26px rgba(0, 86, 179, .3);
}
.btn-azure:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(0, 86, 179, .42); }

.btn-ghost {
    background: rgba(255, 255, 255, .08);
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, .35);
    backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .16); transform: translateY(-3px); }

.btn-outline {
    background: transparent;
    color: var(--azure);
    border: 1.5px solid var(--azure);
}
.btn-outline:hover { background: var(--azure); color: #fff; transform: translateY(-3px); }

/* ============================ TOP BAR ============================ */
.topbar {
    background: var(--navy);
    color: rgba(255, 255, 255, .85);
    font-size: 13.5px;
}
.topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    padding-top: 9px;
    padding-bottom: 9px;
    flex-wrap: wrap;
}
.topbar a { transition: var(--t); }
.topbar a:hover { color: var(--amber); }
.topbar .tb-left { display: flex; gap: 22px; flex-wrap: wrap; }
.topbar .tb-left span i { color: var(--amber); margin-right: 7px; }
.topbar .tb-social { display: flex; gap: 8px; }
.topbar .tb-social a {
    width: 28px; height: 28px; border-radius: 50%;
    display: grid; place-items: center;
    background: rgba(255, 255, 255, .1);
}
.topbar .tb-social a:hover { background: var(--amber); color: var(--navy); }

/* ============================ HEADER / NAV ============================ */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, .82);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    transition: var(--t);
}
.header.scrolled { box-shadow: var(--shadow-sm); background: rgba(255, 255, 255, .94); }

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
    transition: var(--t);
}
.header.scrolled .nav { padding: 9px 0; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 52px; width: auto; object-fit: contain; transition: var(--t); }
.header.scrolled .brand img { height: 44px; }
.brand .brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand .brand-text b { font-size: 17px; font-weight: 800; color: var(--navy); letter-spacing: .2px; }
.brand .brand-text small { font-size: 11px; color: var(--muted); letter-spacing: 1.5px; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links > li > a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    border-radius: 999px;
    font-weight: 500;
    font-size: 15px;
    color: var(--ink);
    transition: var(--t);
}
.nav-links > li > a:hover,
.nav-links > li.active > a { color: var(--azure); background: var(--mist); }

/* dropdown */
.has-drop { position: relative; }
.dropdown {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    min-width: 280px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    box-shadow: var(--shadow-md);
    padding: 10px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--t);
}
.has-drop:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--r-sm);
    font-size: 14.5px;
    transition: var(--t);
}
.dropdown a i {
    width: 34px; height: 34px; border-radius: 9px;
    display: grid; place-items: center;
    background: var(--mist); color: var(--azure);
    font-size: 14px; flex-shrink: 0;
}
.dropdown a:hover { background: var(--mist); }
.dropdown a:hover i { background: var(--grad-azure); color: #fff; }

.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
    display: none;
    width: 44px; height: 44px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--navy);
    font-size: 20px;
    cursor: pointer;
}

/* mobile drawer */
.mobile-menu {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(86%, 360px);
    background: #fff;
    z-index: 1600;
    transform: translateX(100%);
    transition: transform .4s var(--ease);
    padding: 22px;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-overlay {
    position: fixed; inset: 0;
    background: rgba(10, 31, 68, .45);
    backdrop-filter: blur(2px);
    z-index: 1500;
    opacity: 0; visibility: hidden;
    transition: var(--t);
}
.mobile-overlay.open { opacity: 1; visibility: visible; }
.mobile-menu .mm-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.mobile-menu .mm-close { background: var(--mist); border: none; width: 42px; height: 42px; border-radius: 12px; font-size: 20px; cursor: pointer; color: var(--navy); }
.mobile-menu a.mm-link {
    display: flex; align-items: center; gap: 12px;
    padding: 13px 12px; border-radius: 12px;
    font-weight: 500; color: var(--ink);
    border-bottom: 1px solid var(--line);
}
.mobile-menu a.mm-link i { color: var(--azure); width: 22px; }
.mobile-menu a.mm-link:hover { background: var(--mist); }
.mobile-menu .mm-sub a { padding-left: 40px; font-size: 14.5px; font-weight: 400; }
.mobile-menu .btn { width: 100%; justify-content: center; margin-top: 16px; }

/* ============================ HERO ============================ */
.hero {
    position: relative;
    background: var(--grad-hero);
    color: #fff;
    overflow: hidden;
    isolation: isolate;
}
/* vertical "shaft" lines motif */
.hero::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 84px 100%;
    z-index: -1;
    mask-image: linear-gradient(90deg, transparent, #000 30%, #000 70%, transparent);
}
.hero::after {
    content: '';
    position: absolute;
    width: 520px; height: 520px;
    right: -120px; top: -140px;
    background: radial-gradient(circle, rgba(30,136,255,.45), transparent 70%);
    filter: blur(20px);
    z-index: -1;
}
.hero-inner {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 50px;
    align-items: center;
    padding: 78px 0 88px;
}
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.2);
    padding: 7px 16px; border-radius: 999px;
    font-size: 13px; font-weight: 500; letter-spacing: .4px;
    margin-bottom: 22px;
}
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 4px rgba(245,166,35,.25); }
.hero h1 {
    font-size: clamp(30px, 4.4vw, 52px);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -.5px;
    margin-bottom: 20px;
}
.hero h1 .accent { color: var(--amber); }
.hero p.lead { font-size: clamp(15px, 1.6vw, 18px); color: rgba(255,255,255,.85); max-width: 540px; margin-bottom: 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 38px; }
.hero-stats { display: flex; gap: 34px; flex-wrap: wrap; }
.hero-stats .st b { font-size: 30px; font-weight: 800; color: #fff; display: block; line-height: 1; }
.hero-stats .st span { font-size: 13px; color: rgba(255,255,255,.7); }

/* hero visual — stylized elevator car */
.hero-visual { position: relative; display: grid; place-items: center; }
.lift-frame {
    width: 100%;
    max-width: 360px;
    aspect-ratio: 3 / 4;
    border-radius: var(--r-lg);
    background: linear-gradient(160deg, rgba(255,255,255,.16), rgba(255,255,255,.04));
    border: 1px solid rgba(255,255,255,.2);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    padding: 18px;
}
.lift-frame .lift-doors { position: absolute; inset: 0; display: flex; }
.lift-frame .lift-doors span {
    flex: 1;
    background: linear-gradient(180deg, rgba(201,214,227,.22), rgba(201,214,227,.06));
    border-right: 1px solid rgba(255,255,255,.18);
    animation: doorGlow 5s ease-in-out infinite;
}
.lift-frame .lift-doors span:last-child { border-right: none; }
.lift-frame .lift-doors span:nth-child(2){ animation-delay: 1s; }
.lift-frame .floor-badge {
    position: absolute; top: 16px; left: 50%; transform: translateX(-50%);
    background: var(--navy); color: var(--amber);
    font-weight: 800; letter-spacing: 2px;
    padding: 6px 14px; border-radius: 8px; font-size: 13px;
    border: 1px solid rgba(255,255,255,.15);
}
.lift-frame .lift-rail { position: absolute; bottom: 0; left: 0; right: 0; height: 6px; background: var(--grad-amber); }
.chip {
    position: absolute;
    background: #fff;
    color: var(--ink);
    border-radius: 14px;
    padding: 12px 16px;
    box-shadow: var(--shadow-md);
    display: flex; align-items: center; gap: 10px;
    font-size: 13.5px; font-weight: 600;
}
.chip i { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; color: #fff; }
.chip-1 { top: 8%; left: -10px; animation: floaty 6s ease-in-out infinite; }
.chip-1 i { background: var(--grad-azure); }
.chip-2 { bottom: 14%; right: -16px; animation: floaty 6s ease-in-out infinite 1.5s; }
.chip-2 i { background: var(--grad-amber); color: #2a1500; }

@keyframes floaty { 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(-12px); } }
@keyframes doorGlow { 0%,100%{ opacity: .8; } 50%{ opacity: 1; } }

/* ============================ SECTIONS ============================ */
.section { padding: 84px 0; }
.section.tight { padding: 60px 0; }
.section.mist { background: var(--mist); }
.section.navy { background: var(--grad-hero); color: #fff; }

.eyebrow {
    display: inline-flex; align-items: center; gap: 9px;
    color: var(--azure); font-weight: 700; font-size: 13px;
    letter-spacing: 2px; text-transform: uppercase;
    margin-bottom: 14px;
}
.eyebrow::before { content: ''; width: 26px; height: 2px; background: var(--amber); }
.section.navy .eyebrow { color: var(--amber); }

.head { max-width: 720px; margin-bottom: 48px; }
.head.center { margin-left: auto; margin-right: auto; text-align: center; }
.head.center .eyebrow { justify-content: center; }
.head h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; line-height: 1.15; letter-spacing: -.5px; color: var(--navy); }
.section.navy .head h2 { color: #fff; }
.head p { color: var(--muted); margin-top: 14px; font-size: 16px; }
.section.navy .head p { color: rgba(255,255,255,.8); }

/* ============================ STATS BAND ============================ */
.stats-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    padding: 28px 24px;
    text-align: center;
    transition: var(--t);
}
.stat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.stat-card .num { font-size: 38px; font-weight: 800; color: var(--azure); line-height: 1; }
.stat-card .num .suffix { color: var(--amber); }
.stat-card .lbl { color: var(--muted); font-size: 14px; margin-top: 8px; }

/* ============================ PRODUCT GRID ============================ */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.prod-card {
    position: relative;
    background: #fff;
    border-radius: var(--r-lg);
    overflow: hidden;
    border: 1px solid var(--line);
    transition: var(--t);
    display: flex; flex-direction: column;
}
.prod-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); border-color: transparent; }
.prod-media {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--grad-hero);
}
.prod-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.prod-card:hover .prod-media img { transform: scale(1.08); }
.prod-media.icon { display: grid; place-items: center; }
.prod-media.icon i { font-size: 64px; color: rgba(255,255,255,.92); transition: var(--t); }
.prod-media.icon::after {
    content: ''; position: absolute; inset: 0;
    background-image: linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 38px 100%;
}
.prod-card:hover .prod-media.icon i { transform: translateY(-6px) scale(1.06); }
.prod-tag {
    position: absolute; top: 14px; left: 14px;
    background: rgba(255,255,255,.92);
    color: var(--azure);
    font-size: 12px; font-weight: 700;
    padding: 5px 12px; border-radius: 999px;
    z-index: 2;
}
.prod-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.prod-body h3 { font-size: 20px; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.prod-body p { color: var(--muted); font-size: 14.5px; flex: 1; }
.prod-meta { display: flex; gap: 14px; margin: 16px 0; flex-wrap: wrap; }
.prod-meta span { font-size: 12.5px; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.prod-meta span i { color: var(--azure); }
.prod-link {
    display: inline-flex; align-items: center; gap: 8px;
    color: var(--azure); font-weight: 600; font-size: 14.5px;
    transition: var(--t);
}
.prod-link i { transition: var(--t); }
.prod-card:hover .prod-link i { transform: translateX(5px); }

/* ============================ FEATURES ============================ */
.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.feat-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    padding: 28px 24px;
    transition: var(--t);
}
.section.mist .feat-card { background: #fff; }
.feat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: transparent; }
.feat-ico {
    width: 58px; height: 58px; border-radius: 16px;
    display: grid; place-items: center;
    background: var(--mist); color: var(--azure);
    font-size: 23px; margin-bottom: 16px;
    transition: var(--t);
}
.feat-card:hover .feat-ico { background: var(--grad-azure); color: #fff; transform: rotate(-6deg); }
.feat-card h3 { font-size: 17px; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.feat-card p { color: var(--muted); font-size: 14px; }

/* ============================ PROCESS (shaft timeline) ============================ */
.process { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.process::before {
    content: ''; position: absolute; top: 28px; left: 6%; right: 6%; height: 2px;
    background: repeating-linear-gradient(90deg, var(--steel) 0 10px, transparent 10px 20px);
    z-index: 0;
}
.step { position: relative; z-index: 1; text-align: center; }
.step .badge {
    width: 56px; height: 56px; border-radius: 50%;
    background: #fff; border: 2px solid var(--azure);
    color: var(--azure); font-weight: 800; font-size: 18px;
    display: grid; place-items: center; margin: 0 auto 16px;
    transition: var(--t);
}
.step:hover .badge { background: var(--grad-azure); color: #fff; transform: scale(1.08); }
.step h4 { font-size: 16px; color: var(--navy); margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--muted); }

/* ============================ CTA BAND ============================ */
.cta-band {
    background: var(--grad-azure);
    border-radius: var(--r-lg);
    padding: 52px;
    color: #fff;
    display: flex; align-items: center; justify-content: space-between;
    gap: 30px; flex-wrap: wrap;
    position: relative; overflow: hidden;
}
.cta-band::after {
    content: '\f102'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
    position: absolute; right: -10px; bottom: -30px; font-size: 200px;
    color: rgba(255,255,255,.08);
}
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; line-height: 1.2; }
.cta-band p { color: rgba(255,255,255,.85); margin-top: 8px; max-width: 520px; }
.cta-band .cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ============================ FOOTER ============================ */
.footer { background: var(--navy); color: rgba(255,255,255,.78); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 36px; padding-bottom: 44px; }
.footer h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer .f-about p { font-size: 14px; margin-bottom: 18px; }
.footer .f-social { display: flex; gap: 10px; }
.footer .f-social a { width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,.08); display: grid; place-items: center; transition: var(--t); }
.footer .f-social a:hover { background: var(--amber); color: var(--navy); transform: translateY(-4px); }
.footer .f-links li { margin-bottom: 11px; }
.footer .f-links a { font-size: 14px; transition: var(--t); display: inline-flex; align-items: center; gap: 8px; }
.footer .f-links a:hover { color: var(--amber); padding-left: 4px; }
.footer .f-contact li { display: flex; gap: 12px; margin-bottom: 14px; font-size: 14px; }
.footer .f-contact i { color: var(--amber); margin-top: 4px; min-width: 16px; }
.footer .copyright { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; text-align: center; font-size: 13.5px; color: rgba(255,255,255,.55); }

/* ============================ PRODUCT PAGE PARTS ============================ */
.page-hero {
    position: relative;
    background: var(--grad-hero);
    color: #fff;
    padding: 64px 0 76px;
    overflow: hidden;
    isolation: isolate;
}
.page-hero::before {
    content: ''; position: absolute; inset: 0; z-index: -1;
    background-image: linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 84px 100%;
    mask-image: linear-gradient(90deg, transparent, #000 40%, transparent);
}
.breadcrumb { display: flex; gap: 8px; font-size: 13.5px; color: rgba(255,255,255,.7); margin-bottom: 20px; flex-wrap: wrap; }
.breadcrumb a:hover { color: var(--amber); }
.breadcrumb .sep { opacity: .5; }
.page-hero .ph-tag {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
    padding: 6px 15px; border-radius: 999px; font-size: 13px; margin-bottom: 16px;
}
.page-hero h1 { font-size: clamp(28px, 4vw, 46px); font-weight: 800; line-height: 1.14; letter-spacing: -.5px; max-width: 800px; }
.page-hero p { color: rgba(255,255,255,.85); margin-top: 16px; max-width: 640px; font-size: 16.5px; }
.page-hero .ph-actions { margin-top: 28px; display: flex; gap: 14px; flex-wrap: wrap; }

.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: center; }
.split.rev .split-media { order: -1; }
.rich p { color: var(--muted); margin-bottom: 16px; font-size: 16px; }
.rich h3 { color: var(--navy); font-size: 22px; margin: 26px 0 12px; }
.tick-list li { display: flex; gap: 12px; margin-bottom: 12px; color: var(--ink); font-size: 15px; }
.tick-list li i { color: #16a34a; margin-top: 5px; flex-shrink: 0; }

.media-card {
    border-radius: var(--r-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4 / 3.4;
    background: var(--grad-hero);
    position: relative;
    display: grid; place-items: center;
}
.media-card img { width: 100%; height: 100%; object-fit: cover; }
.media-card.icon i { font-size: 110px; color: rgba(255,255,255,.92); }
.media-card.icon::after {
    content: ''; position: absolute; inset: 0;
    background-image: linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 46px 100%;
}

/* spec table */
.spec-wrap { background: #fff; border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; box-shadow: var(--shadow-sm); }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td { padding: 16px 22px; text-align: left; font-size: 15px; }
.spec-table th { background: var(--navy); color: #fff; font-weight: 600; }
.spec-table tr:nth-child(even) td { background: var(--paper); }
.spec-table td:first-child { font-weight: 600; color: var(--navy); width: 38%; }
.spec-table td { border-bottom: 1px solid var(--line); color: var(--muted); }

/* application chips */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.app-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--r-md);
    padding: 22px; display: flex; gap: 16px; align-items: flex-start; transition: var(--t);
}
.app-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.app-card .ai { width: 50px; height: 50px; border-radius: 14px; background: var(--mist); color: var(--azure); display: grid; place-items: center; font-size: 20px; flex-shrink: 0; }
.app-card h4 { color: var(--navy); font-size: 16px; margin-bottom: 4px; }
.app-card p { color: var(--muted); font-size: 13.5px; }

/* FAQ */
.faq { max-width: 820px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--r-md); margin-bottom: 14px; overflow: hidden; transition: var(--t); }
.faq-item.open { box-shadow: var(--shadow-md); border-color: transparent; }
.faq-q { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 20px 24px; cursor: pointer; font-weight: 600; color: var(--navy); font-size: 16px; }
.faq-q i { transition: var(--t); color: var(--azure); flex-shrink: 0; }
.faq-item.open .faq-q i { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s var(--ease); }
.faq-a p { padding: 0 24px 22px; color: var(--muted); font-size: 15px; }

/* related products mini */
.rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }

/* ============================ SCROLL REVEAL ============================ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }

/* ============================ RESPONSIVE ============================ */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; gap: 44px; }
    .hero-visual { order: -1; }
    .lift-frame { max-width: 300px; }
    .prod-grid, .feat-grid, .stats-band { grid-template-columns: repeat(2, 1fr); }
    .process { grid-template-columns: repeat(2, 1fr); gap: 36px 22px; }
    .process::before { display: none; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .split { grid-template-columns: 1fr; gap: 34px; }
    .split.rev .split-media { order: 0; }
    .app-grid, .rel-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links, .nav-cta .btn { display: none; }
    .nav-toggle { display: grid; place-items: center; }
    .section { padding: 60px 0; }
    .topbar .tb-left { gap: 14px; }
    .cta-band { padding: 36px 26px; }
}

@media (max-width: 600px) {
    .prod-grid, .feat-grid, .stats-band, .app-grid, .rel-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .hero-stats { gap: 22px; }
    .hero-stats .st b { font-size: 24px; }
    .topbar { font-size: 12px; }
    .topbar .tb-left span:nth-child(2) { display: none; }
    .spec-table th, .spec-table td { padding: 13px 14px; font-size: 13.5px; }
    .chip { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .reveal { opacity: 1; transform: none; }
    html { scroll-behavior: auto; }
}

/* ============================ BLOG ============================ */
/* Blog teaser section on index */
.blog-feature { display: grid; grid-template-columns: 1.3fr .7fr; gap: 26px; align-items: stretch; }
.blog-main {
    position: relative; border-radius: var(--r-lg); overflow: hidden;
    border: 1px solid var(--line); background: #fff; display: flex; flex-direction: column;
    transition: var(--t);
}
.blog-main:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.blog-main .bm-media {
    aspect-ratio: 16/7; background: var(--grad-hero); position: relative; display: grid; place-items: center;
}
.blog-main .bm-media::after {
    content: ''; position: absolute; inset: 0;
    background-image: linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 46px 100%;
}
.blog-main .bm-media i { font-size: 70px; color: rgba(255,255,255,.92); }
.blog-main .bm-body { padding: 26px 28px 28px; }
.blog-cat { display: inline-flex; gap: 7px; align-items: center; font-size: 12px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase; color: var(--azure); margin-bottom: 12px; }
.blog-main h3 { font-size: 24px; font-weight: 800; color: var(--navy); line-height: 1.25; margin-bottom: 10px; }
.blog-main p { color: var(--muted); font-size: 15px; margin-bottom: 16px; }
.blog-meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.blog-meta span i { color: var(--azure); margin-right: 6px; }
.blog-side { display: flex; flex-direction: column; gap: 16px; }
.blog-mini {
    background: #fff; border: 1px solid var(--line); border-radius: var(--r-md);
    padding: 18px 20px; display: flex; gap: 14px; align-items: flex-start; transition: var(--t); flex: 1;
}
.blog-mini:hover { transform: translateX(5px); box-shadow: var(--shadow-md); border-color: transparent; }
.blog-mini .bi { width: 44px; height: 44px; border-radius: 12px; background: var(--mist); color: var(--azure); display: grid; place-items: center; font-size: 18px; flex-shrink: 0; }
.blog-mini h4 { font-size: 15px; color: var(--navy); margin-bottom: 3px; line-height: 1.3; }
.blog-mini p { font-size: 12.5px; color: var(--muted); }

/* Blog article page */
.blog-hero { position: relative; background: var(--grad-hero); color: #fff; padding: 56px 0 64px; overflow: hidden; isolation: isolate; }
.blog-hero::before {
    content: ''; position: absolute; inset: 0; z-index: -1;
    background-image: linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 84px 100%; mask-image: linear-gradient(90deg, transparent, #000 40%, transparent);
}
.blog-hero .bh-cat { display: inline-flex; gap: 7px; align-items: center; background: var(--grad-amber); color: #2a1500; font-weight: 700; font-size: 12px; letter-spacing: .5px; padding: 6px 14px; border-radius: 999px; margin-bottom: 16px; text-transform: uppercase; }
.blog-hero h1 { font-size: clamp(26px, 3.8vw, 42px); font-weight: 800; line-height: 1.18; letter-spacing: -.5px; max-width: 860px; }
.blog-hero .bh-meta { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 20px; font-size: 14px; color: rgba(255,255,255,.82); }
.blog-hero .bh-meta span i { color: var(--amber); margin-right: 7px; }

.article-layout { display: grid; grid-template-columns: 1fr; max-width: 820px; margin: 0 auto; }
.toc { background: var(--mist); border: 1px solid var(--line); border-radius: var(--r-md); padding: 22px 26px; margin-bottom: 36px; }
.toc h2 { font-size: 16px; color: var(--navy); margin-bottom: 14px; display: flex; align-items: center; gap: 9px; }
.toc h2 i { color: var(--azure); }
.toc ol { list-style: none; counter-reset: toc; }
.toc li { counter-increment: toc; margin-bottom: 9px; }
.toc a { display: flex; gap: 10px; font-size: 14.5px; color: var(--ink); transition: var(--t); }
.toc a::before { content: counter(toc, decimal-leading-zero); color: var(--azure); font-weight: 700; font-size: 13px; }
.toc a:hover { color: var(--azure); }

.article { font-size: 16.5px; line-height: 1.8; color: #243b5e; }
.article p { margin-bottom: 20px; }
.article h2 { font-size: 26px; font-weight: 800; color: var(--navy); margin: 42px 0 16px; line-height: 1.25; scroll-margin-top: 90px; }
.article h2 .hn { color: var(--azure); margin-right: 10px; }
.article h3 { font-size: 20px; font-weight: 700; color: var(--navy); margin: 28px 0 12px; }
.article a.inlink { color: var(--azure); font-weight: 600; border-bottom: 1.5px solid rgba(0,86,179,.3); transition: var(--t); }
.article a.inlink:hover { border-color: var(--azure); }
.article ul { margin: 0 0 20px; padding-left: 0; }
.article ul li { position: relative; padding-left: 30px; margin-bottom: 11px; }
.article ul li::before { content: '\f058'; font-family: 'Font Awesome 6 Free'; font-weight: 900; color: #16a34a; position: absolute; left: 0; top: 2px; }
.article .lead-p { font-size: 18px; color: var(--muted); border-left: 4px solid var(--amber); padding-left: 18px; }
.article blockquote {
    background: var(--mist); border-radius: var(--r-md); padding: 22px 26px; margin: 0 0 24px;
    border-left: 4px solid var(--azure); color: var(--navy); font-weight: 500;
}
.article .keytable { width: 100%; border-collapse: collapse; margin: 0 0 24px; border-radius: var(--r-md); overflow: hidden; box-shadow: var(--shadow-sm); font-size: 15px; }
.article .keytable th { background: var(--navy); color: #fff; padding: 13px 16px; text-align: left; font-weight: 600; }
.article .keytable td { padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--muted); }
.article .keytable td:first-child { font-weight: 600; color: var(--navy); }
.article .keytable tr:nth-child(even) td { background: var(--paper); }

.author-box { display: flex; gap: 16px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: var(--r-md); padding: 22px 24px; margin-top: 40px; max-width: 820px; margin-left: auto; margin-right: auto; }
.author-box .av { width: 56px; height: 56px; border-radius: 50%; background: var(--grad-azure); color: #fff; display: grid; place-items: center; font-size: 22px; flex-shrink: 0; }
.author-box b { color: var(--navy); display: block; }
.author-box span { font-size: 13.5px; color: var(--muted); }

.share-row { display: flex; gap: 10px; align-items: center; margin-top: 28px; max-width: 820px; margin-left: auto; margin-right: auto; flex-wrap: wrap; }
.share-row b { color: var(--navy); font-size: 14px; }
.share-row a { width: 40px; height: 40px; border-radius: 50%; background: var(--mist); color: var(--azure); display: grid; place-items: center; transition: var(--t); }
.share-row a:hover { background: var(--grad-azure); color: #fff; transform: translateY(-3px); }

@media (max-width: 1024px) { .blog-feature { grid-template-columns: 1fr; } }