/* ============================================================
   Chisu Automation — Global Design Tokens & Base
   ============================================================ */

:root {
  /* Brand colors — industrial trust + accent */
  --c-navy-900: #0B1F3A;
  --c-navy-800: #102B52;
  --c-navy-700: #163769;
  --c-navy-600: #1E4A87;
  --c-accent:    #F36F21;
  --c-accent-d:  #D85A0E;
  --c-bg:        #FFFFFF;
  --c-bg-soft:   #F5F7FA;
  --c-bg-card:   #FAFBFD;
  --c-line:      #E4E8EE;
  --c-text:      #1A2332;
  --c-text-2:    #4A5567;
  --c-text-3:    #8895A8;

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;

  --shadow-sm: 0 1px 2px rgba(11,31,58,.05), 0 1px 3px rgba(11,31,58,.06);
  --shadow-md: 0 4px 12px rgba(11,31,58,.08), 0 2px 4px rgba(11,31,58,.06);
  --shadow-lg: 0 12px 32px rgba(11,31,58,.14), 0 4px 8px rgba(11,31,58,.06);

  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Inter', system-ui, sans-serif;

  --container: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.55;
  font-size: 16px;
  font-feature-settings: "cv11", "ss03";
  -webkit-font-smoothing: antialiased;
}
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-accent); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ============================================================
   Header & Nav
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-line);
}
.nav { display: flex; align-items: center; justify-content: flex-start; height: 72px; }
.nav__brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 20px; color: var(--c-navy-900); letter-spacing: -.02em; white-space: nowrap; flex-shrink: 0; margin-right: auto; }

/* Language switcher */
.lang-switch { display: flex; gap: 2px; align-items: center; margin-left: 20px; flex-shrink: 0; }
.lang-switch__item { font-size: 12px; font-weight: 700; color: var(--c-text-3); padding: 5px 8px; border-radius: 5px; letter-spacing: .03em; }
.lang-switch__item:hover { color: var(--c-navy-900); background: var(--c-bg-soft); }
.lang-switch__item.is-active { color: var(--c-navy-900); background: var(--c-bg-soft); }
.nav__toggle { margin-left: 8px; }
.nav__brand-mark {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--c-navy-900) 0%, var(--c-navy-700) 100%);
  display: grid; place-items: center;
  color: white; font-weight: 900; font-size: 18px; letter-spacing: -.04em;
}
.nav__brand small { display: block; font-size: 11px; color: var(--c-text-3); font-weight: 500; letter-spacing: .08em; text-transform: uppercase; margin-top: 1px; }

.nav__menu { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav__menu > li { position: relative; }
.nav__menu a {
  font-size: 15px; font-weight: 500;
  color: var(--c-text-2);
  display: flex; align-items: center; gap: 4px;
  padding: 6px 0;
}
.nav__menu a:hover { color: var(--c-navy-900); }
.nav__menu .has-sub > a::after {
  content: ""; width: 6px; height: 6px;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}
.nav__sub {
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: white; border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  padding: 12px; min-width: 240px;
  list-style: none;
  opacity: 0; visibility: hidden;
  transition: all .2s;
}
.nav__menu > li:hover .nav__sub { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav__sub a { padding: 10px 14px; border-radius: var(--r-sm); font-size: 14px; }
.nav__sub a:hover { background: var(--c-bg-soft); color: var(--c-navy-900); }

.nav__menu a.nav__cta {
  background: var(--c-accent);
  color: #fff;
  padding: 11px 22px;
  border-radius: var(--r-md);
  font-size: 14px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 8px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(243,111,33,.25);
}
.nav__menu a.nav__cta:hover { background: var(--c-accent-d); color: #fff; }

.nav__toggle { display: none; }

/* ============================================================
   Buttons
   ============================================================ */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: var(--r-md); font-weight: 600; font-size: 15px; transition: all .2s; cursor: pointer; }
.btn--primary { background: var(--c-accent); color: white; box-shadow: 0 4px 14px rgba(243,111,33,.3); }
.btn--primary:hover { background: var(--c-accent-d); color: white; transform: translateY(-1px); }
.btn--ghost { background: transparent; color: white; border: 1.5px solid rgba(255,255,255,.4); }
.btn--ghost:hover { background: rgba(255,255,255,.1); color: white; border-color: white; }
.btn--outline { background: white; color: var(--c-navy-900); border: 1.5px solid var(--c-line); }
.btn--outline:hover { border-color: var(--c-navy-900); color: var(--c-navy-900); }

/* ============================================================
   Hero
   ============================================================ */
.hero { position: relative; overflow: hidden; background: var(--c-navy-900); color: white; }
.hero__media { position: absolute; inset: 0; }
.hero__media video, .hero__media img { width: 100%; height: 100%; object-fit: cover; opacity: .35; }
.hero__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(11,31,58,.6) 0%, rgba(11,31,58,.85) 100%); }
.hero__inner { position: relative; max-width: var(--container); margin: 0 auto; padding: 120px 24px 100px; }
.hero__eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px; background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18); border-radius: 999px; font-size: 13px; font-weight: 500; color: rgba(255,255,255,.85); margin-bottom: 24px; }
.hero__eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--c-accent); box-shadow: 0 0 12px var(--c-accent); }
.hero__title { font-size: clamp(36px, 5vw, 64px); font-weight: 800; line-height: 1.05; letter-spacing: -.025em; margin-bottom: 24px; max-width: 880px; }
.hero__title em { font-style: normal; color: var(--c-accent); }
.hero__lead { font-size: clamp(16px, 1.4vw, 19px); line-height: 1.6; color: rgba(255,255,255,.78); max-width: 640px; margin-bottom: 40px; }
.hero__cta-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 60px; }
.hero__stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; padding-top: 40px; border-top: 1px solid rgba(255,255,255,.14); }
.hero__stat-num { font-size: clamp(28px, 3vw, 40px); font-weight: 800; color: white; letter-spacing: -.02em; line-height: 1; }
.hero__stat-num span { color: var(--c-accent); }
.hero__stat-label { font-size: 13px; color: rgba(255,255,255,.6); margin-top: 8px; text-transform: uppercase; letter-spacing: .05em; }

/* ============================================================
   Section base
   ============================================================ */
.section { padding: 96px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--dark { background: var(--c-navy-900); color: white; }
.section__head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.section__eyebrow { display: inline-block; font-size: 13px; font-weight: 700; color: var(--c-accent); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 16px; }
.section__title { font-size: clamp(28px, 3.2vw, 44px); font-weight: 800; line-height: 1.15; letter-spacing: -.02em; margin-bottom: 16px; }
.section__lead { font-size: 17px; color: var(--c-text-2); line-height: 1.6; }
.section--dark .section__lead { color: rgba(255,255,255,.7); }

/* ============================================================
   Trust bar
   ============================================================ */
.trust-bar { padding: 36px 0; background: var(--c-bg-soft); border-bottom: 1px solid var(--c-line); }
.trust-bar__inner { display: flex; align-items: center; gap: 48px; flex-wrap: wrap; justify-content: center; }
.trust-bar__label { font-size: 13px; font-weight: 600; color: var(--c-text-3); letter-spacing: .08em; text-transform: uppercase; }
.trust-bar__logos { display: flex; align-items: center; gap: 40px; flex-wrap: wrap; }
.trust-bar__logos img { height: 32px; opacity: .55; filter: grayscale(100%); transition: all .2s; }
.trust-bar__logos img:hover { opacity: 1; filter: none; }

/* ============================================================
   Product grid
   ============================================================ */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
  background: white; border-radius: var(--r-lg); overflow: hidden;
  border: 1px solid var(--c-line); transition: all .25s;
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--c-navy-700); }
.product-card__media { aspect-ratio: 4/3; background: var(--c-bg-soft); position: relative; overflow: hidden; }
.product-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.product-card:hover .product-card__media img { transform: scale(1.05); }
.product-card__media-fallback { position: absolute; inset: 0; display: grid; place-items: center; color: var(--c-text-3); }
.product-card__body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.product-card__tag { font-size: 11px; font-weight: 700; color: var(--c-accent); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 8px; }
.product-card__name { font-size: 22px; font-weight: 700; color: var(--c-navy-900); margin-bottom: 12px; letter-spacing: -.015em; }
.product-card__desc { font-size: 14px; color: var(--c-text-2); line-height: 1.55; margin-bottom: 20px; flex: 1; }
.product-card__link { font-size: 14px; font-weight: 600; color: var(--c-navy-700); display: inline-flex; align-items: center; gap: 4px; }
.product-card__link::after { content: "→"; transition: transform .2s; }
.product-card:hover .product-card__link { color: var(--c-accent); }
.product-card:hover .product-card__link::after { transform: translateX(4px); }

/* ============================================================
   Industries grid
   ============================================================ */
.industries-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.industry-card {
  position: relative; aspect-ratio: 4/3;
  border-radius: var(--r-md); overflow: hidden;
  background: var(--c-navy-800);
  display: flex; align-items: flex-end;
  padding: 24px; color: white;
  transition: transform .25s;
}
.industry-card:hover { transform: translateY(-3px); color: white; }
.industry-card__bg { position: absolute; inset: 0; opacity: .45; transition: opacity .25s; }
.industry-card__bg img { width: 100%; height: 100%; object-fit: cover; }
.industry-card:hover .industry-card__bg { opacity: .6; }
.industry-card::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(11,31,58,.85) 100%); }
.industry-card__title { position: relative; font-size: 18px; font-weight: 700; line-height: 1.25; }
.industry-card__sub { position: relative; font-size: 12px; color: rgba(255,255,255,.6); margin-top: 4px; }

/* ============================================================
   Why-Us / Capability blocks
   ============================================================ */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.feature-card { background: white; border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 36px; transition: all .25s; }
.feature-card:hover { border-color: var(--c-navy-700); box-shadow: var(--shadow-md); }
.feature-card__icon { width: 52px; height: 52px; border-radius: 12px; background: var(--c-bg-soft); display: grid; place-items: center; margin-bottom: 24px; color: var(--c-navy-700); }
.feature-card__icon svg { width: 26px; height: 26px; }
.feature-card__title { font-size: 19px; font-weight: 700; margin-bottom: 12px; color: var(--c-navy-900); letter-spacing: -.01em; }
.feature-card__desc { font-size: 15px; color: var(--c-text-2); line-height: 1.6; }

/* ============================================================
   CTA section
   ============================================================ */
.cta-band {
  background: linear-gradient(135deg, var(--c-navy-900) 0%, var(--c-navy-700) 100%);
  color: white; padding: 80px 0;
  position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(243,111,33,.18) 0%, transparent 40%);
}
.cta-band__inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-band__title { font-size: clamp(24px, 2.6vw, 36px); font-weight: 800; line-height: 1.2; letter-spacing: -.02em; max-width: 600px; }
.cta-band__title em { font-style: normal; color: var(--c-accent); }
.cta-band__sub { font-size: 16px; color: rgba(255,255,255,.7); margin-top: 8px; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { background: #08152B; color: rgba(255,255,255,.7); padding: 72px 0 32px; font-size: 14px; }
.footer__grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer__brand { color: white; font-weight: 800; font-size: 22px; margin-bottom: 16px; letter-spacing: -.02em; }
.footer__about { color: rgba(255,255,255,.55); line-height: 1.65; max-width: 320px; margin-bottom: 24px; }
.footer__col-title { color: white; font-size: 14px; font-weight: 700; margin-bottom: 18px; text-transform: uppercase; letter-spacing: .06em; }
.footer__list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer__list a { color: rgba(255,255,255,.6); font-size: 14px; }
.footer__list a:hover { color: white; }
.footer__bottom { display: flex; justify-content: space-between; padding-top: 28px; flex-wrap: wrap; gap: 12px; font-size: 13px; color: rgba(255,255,255,.4); }

/* ============================================================
   Page Hero (interior pages)
   ============================================================ */
.page-hero { background: linear-gradient(135deg, var(--c-navy-900) 0%, var(--c-navy-700) 100%); color: white; padding: 120px 0 80px; position: relative; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(circle at 80% 30%, rgba(243,111,33,.12) 0%, transparent 50%); }
.page-hero__inner { position: relative; max-width: 880px; }
.page-hero__crumb { font-size: 13px; color: rgba(255,255,255,.55); margin-bottom: 16px; }
.page-hero__crumb a:hover { color: var(--c-accent); }
.page-hero__title { font-size: clamp(34px, 4.2vw, 54px); font-weight: 800; line-height: 1.1; letter-spacing: -.02em; margin-bottom: 20px; }
.page-hero__lead { font-size: 18px; line-height: 1.6; color: rgba(255,255,255,.75); max-width: 720px; }

/* ============================================================
   Industry detail block
   ============================================================ */
.industry-block { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; padding: 80px 0; border-bottom: 1px solid var(--c-line); }
.industry-block:nth-child(even) .industry-block__media { order: 2; }
.industry-block__media { aspect-ratio: 4/3; border-radius: var(--r-lg); overflow: hidden; background: var(--c-bg-soft); }
.industry-block__media img { width: 100%; height: 100%; object-fit: cover; }
.industry-block__tag { display: inline-block; font-size: 12px; font-weight: 700; color: var(--c-accent); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 16px; }
.industry-block__title { font-size: 30px; font-weight: 800; line-height: 1.2; letter-spacing: -.02em; margin-bottom: 24px; color: var(--c-navy-900); }
.industry-block__row { margin-bottom: 24px; }
.industry-block__label { font-size: 12px; font-weight: 700; color: var(--c-accent); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 8px; }
.industry-block__text { font-size: 15px; color: var(--c-text-2); line-height: 1.65; }
.industry-block__clients { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.industry-block__client { padding: 6px 14px; background: var(--c-bg-soft); border-radius: 999px; font-size: 12px; color: var(--c-text-2); }

/* ============================================================
   Product detail
   ============================================================ */
.product-hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px; padding: 80px 0; align-items: center; }
.product-hero__media { aspect-ratio: 4/3; background: var(--c-bg-soft); border-radius: var(--r-lg); overflow: hidden; border: 1px solid var(--c-line); }
.product-hero__tag { font-size: 13px; font-weight: 700; color: var(--c-accent); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 16px; }
.product-hero__title { font-size: clamp(30px, 3.4vw, 44px); font-weight: 800; line-height: 1.1; letter-spacing: -.02em; margin-bottom: 20px; color: var(--c-navy-900); }
.product-hero__lead { font-size: 17px; color: var(--c-text-2); line-height: 1.6; margin-bottom: 32px; }
.product-spec { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 32px; }
.product-spec__item { padding: 14px 18px; background: var(--c-bg-soft); border-radius: var(--r-md); }
.product-spec__label { font-size: 11px; color: var(--c-text-3); letter-spacing: .08em; text-transform: uppercase; font-weight: 700; }
.product-spec__value { font-size: 16px; color: var(--c-navy-900); font-weight: 700; margin-top: 4px; }

/* ============================================================
   RFQ form
   ============================================================ */
.rfq { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; align-items: start; padding: 80px 0; }
.rfq__side h3 { font-size: 28px; font-weight: 800; color: var(--c-navy-900); margin-bottom: 16px; letter-spacing: -.02em; }
.rfq__side p { color: var(--c-text-2); line-height: 1.65; margin-bottom: 32px; }
.rfq__contact-row { display: flex; gap: 12px; align-items: flex-start; padding: 20px 0; border-top: 1px solid var(--c-line); }
.rfq__contact-row svg { width: 22px; height: 22px; color: var(--c-navy-700); flex-shrink: 0; margin-top: 2px; }
.rfq__contact-row strong { display: block; color: var(--c-navy-900); margin-bottom: 2px; font-size: 14px; }
.rfq__contact-row span { font-size: 14px; color: var(--c-text-2); }
.rfq__form { background: white; border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 40px; box-shadow: var(--shadow-md); }
.form-row { margin-bottom: 22px; }
.form-row--split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row label { display: block; font-size: 13px; font-weight: 600; color: var(--c-text); margin-bottom: 8px; }
.form-row label sup { color: var(--c-accent); }
.form-row input, .form-row select, .form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--c-line);
  border-radius: var(--r-md);
  font-family: inherit; font-size: 15px;
  background: white; color: var(--c-text);
  transition: border-color .15s, box-shadow .15s;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--c-navy-700);
  box-shadow: 0 0 0 3px rgba(22,55,105,.1);
}
.form-row textarea { min-height: 120px; resize: vertical; }

/* ============================================================
   Spec table
   ============================================================ */
.spec-table-wrap { max-width: 860px; margin: 0 auto; border: 1px solid var(--c-line); border-radius: var(--r-lg); overflow: hidden; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.spec-table tr { border-bottom: 1px solid var(--c-line); }
.spec-table tr:last-child { border-bottom: none; }
.spec-table tr:nth-child(odd) { background: var(--c-bg-soft); }
.spec-table th { text-align: left; padding: 16px 24px; width: 38%; color: var(--c-navy-900); font-weight: 700; vertical-align: top; }
.spec-table td { padding: 16px 24px; color: var(--c-text-2); }

/* ============================================================
   Chips / tags
   ============================================================ */
.chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chip { padding: 8px 16px; background: var(--c-bg-soft); border: 1px solid var(--c-line); border-radius: 999px; font-size: 13px; color: var(--c-text-2); font-weight: 500; }
.prose { font-size: 15px; color: var(--c-text-2); line-height: 1.7; margin-bottom: 16px; }

/* ============================================================
   Value list
   ============================================================ */
.value-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.value-list li { font-size: 15px; color: var(--c-text-2); line-height: 1.55; padding-left: 26px; position: relative; }
.value-list li::before { content: ""; position: absolute; left: 0; top: 8px; width: 14px; height: 8px; border-left: 2px solid var(--c-accent); border-bottom: 2px solid var(--c-accent); transform: rotate(-45deg); }
.value-list strong { color: var(--c-navy-900); }

/* ============================================================
   Industry quick-nav
   ============================================================ */
.industry-nav { background: white; border-bottom: 1px solid var(--c-line); position: sticky; top: 72px; z-index: 20; }
.industry-nav__inner { display: flex; gap: 8px; overflow-x: auto; padding: 14px 24px; scrollbar-width: thin; }
.industry-nav__inner a { white-space: nowrap; font-size: 13px; font-weight: 600; color: var(--c-text-2); padding: 7px 14px; border-radius: 999px; background: var(--c-bg-soft); transition: all .15s; }
.industry-nav__inner a:hover { background: var(--c-navy-900); color: white; }

/* product grid 3-col helper */
.product-grid--3 { grid-template-columns: repeat(3, 1fr); }

/* ============================================================
   Proof / factory block (dark)
   ============================================================ */
.proof { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
.proof__media { border-radius: var(--r-lg); overflow: hidden; aspect-ratio: 4/3; }
.proof__media img { width: 100%; height: 100%; object-fit: cover; }
.proof__stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px 40px; }
.proof__stats--wide { grid-template-columns: repeat(5, 1fr); text-align: center; }
.proof__num { font-size: 34px; font-weight: 800; color: white; letter-spacing: -.02em; line-height: 1; }
.proof__num span { color: var(--c-accent); font-size: .7em; }
.proof__label { font-size: 13px; color: rgba(255,255,255,.6); margin-top: 8px; }

/* ============================================================
   Gallery (factory) + Cert grid
   ============================================================ */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.gallery__item { border-radius: var(--r-md); overflow: hidden; background: var(--c-bg-soft); }
.gallery__item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.gallery__item figcaption { font-size: 13px; color: var(--c-text-2); padding: 12px 14px; line-height: 1.4; }

.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cert-card { background: white; border: 1px solid var(--c-line); border-radius: var(--r-md); padding: 20px; text-align: center; transition: box-shadow .2s; }
.cert-card:hover { box-shadow: var(--shadow-md); }
.cert-card img { width: 100%; height: 220px; object-fit: contain; background: var(--c-bg-soft); border-radius: var(--r-sm); }
.cert-card figcaption { font-size: 14px; font-weight: 600; color: var(--c-navy-900); margin-top: 14px; }

/* ============================================================
   Channels grid (contact)
   ============================================================ */
.channel-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.channel-card { display: block; background: white; border: 1px solid var(--c-line); border-radius: var(--r-md); padding: 28px 20px; text-align: center; transition: all .2s; }
.channel-card:hover { border-color: var(--c-navy-700); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.channel-card__icon { width: 52px; height: 52px; border-radius: 14px; margin: 0 auto 16px; display: grid; place-items: center; color: white; font-weight: 800; font-size: 14px; }
.channel-card strong { display: block; color: var(--c-navy-900); font-size: 16px; margin-bottom: 4px; }
.channel-card span { font-size: 13px; color: var(--c-text-3); }

/* ============================================================
   Video feature + Resource grid + FAQ
   ============================================================ */
.video-feature { max-width: 900px; margin: 0 auto; border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-lg); background: #000; }
.video-feature video { width: 100%; display: block; }

.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.resource-card { background: white; border: 1px solid var(--c-line); border-radius: var(--r-lg); padding: 32px; transition: all .2s; display: block; }
.resource-card:hover { border-color: var(--c-navy-700); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.resource-card__icon { width: 48px; height: 48px; border-radius: 12px; background: var(--c-bg-soft); display: grid; place-items: center; color: var(--c-navy-700); margin-bottom: 20px; }
.resource-card__icon svg { width: 24px; height: 24px; }
.resource-card h3 { font-size: 18px; font-weight: 700; color: var(--c-navy-900); margin-bottom: 10px; }
.resource-card p { font-size: 14px; color: var(--c-text-2); line-height: 1.55; margin-bottom: 16px; }
.resource-card__link { font-size: 14px; font-weight: 600; color: var(--c-accent); }

.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--c-line); border-radius: var(--r-md); background: white; overflow: hidden; }
.faq-item summary { padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--c-navy-900); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 24px; color: var(--c-accent); font-weight: 400; flex-shrink: 0; transition: transform .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 24px 22px; font-size: 15px; color: var(--c-text-2); line-height: 1.65; }

/* ============================================================
   Floating contact (WhatsApp / LINE / Zalo / Email)
   ============================================================ */
.float-contact { position: fixed; right: 20px; bottom: 24px; z-index: 60; display: flex; flex-direction: column; gap: 12px; }
.float-contact__btn { width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; box-shadow: var(--shadow-lg); color: white; transition: transform .2s; position: relative; }
.float-contact__btn:hover { transform: scale(1.08); color: white; }
.float-contact__btn svg { width: 26px; height: 26px; }
.float-contact__btn--wa { background: #25D366; }
.float-contact__btn--line { background: #06C755; }
.float-contact__btn--zalo { background: #0068FF; font-weight: 800; font-size: 13px; }
.float-contact__btn--mail { background: var(--c-navy-700); }
.float-contact__btn--phone { background: var(--c-navy-600); }
.float-contact__btn::after { content: attr(data-tip); position: absolute; right: 64px; top: 50%; transform: translateY(-50%); background: var(--c-navy-900); color: white; font-size: 12px; padding: 6px 12px; border-radius: 6px; white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity .2s; }
.float-contact__btn:hover::after { opacity: 1; }

/* ============================================================
   Mobile
   ============================================================ */
@media (max-width: 1024px) {
  /* Collapse navigation to hamburger on tablet / narrow laptop */
  .nav__menu { display: none; position: fixed; top: 72px; left: 0; right: 0; background: white; flex-direction: column; gap: 0; padding: 16px; border-bottom: 1px solid var(--c-line); box-shadow: var(--shadow-md); max-height: calc(100vh - 72px); overflow-y: auto; }
  .nav__menu.is-open { display: flex; }
  .nav__menu > li { width: 100%; }
  .nav__menu > li > a { padding: 14px 8px; width: 100%; border-bottom: 1px solid var(--c-line); justify-content: space-between; }
  .nav__menu a.nav__cta { display: flex; justify-content: center; margin-top: 12px; border-bottom: none; }
  .nav__sub { position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none; padding: 4px 8px 12px 24px; border: none; min-width: 0; }
  .nav__toggle { display: grid; place-items: center; width: 40px; height: 40px; color: var(--c-navy-900); }
  .nav__toggle svg { width: 24px; height: 24px; }

  .product-grid, .product-grid--3, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .industries-grid { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .industry-block { grid-template-columns: 1fr; gap: 32px; padding: 56px 0; }
  .industry-block:nth-child(even) .industry-block__media { order: 0; }
  .product-hero, .rfq, .proof { grid-template-columns: 1fr; gap: 40px; padding: 56px 0; }
  .proof { padding: 0; }
  .section { padding: 72px 0; }
  .hero__inner { padding: 80px 24px 64px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .cert-grid, .resource-grid { grid-template-columns: repeat(2, 1fr); }
  .channel-grid { grid-template-columns: repeat(2, 1fr); }
  .proof__stats--wide { grid-template-columns: repeat(3, 1fr); gap: 24px; }
}
@media (max-width: 720px) {
  .container { padding: 0 18px; }
  .nav__brand small { display: none; }
  .nav__brand { font-size: 18px; }
  .lang-switch { margin-left: 10px; }
  .product-grid, .product-grid--3, .feature-grid, .industries-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .hero__cta-row { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
  .product-spec, .form-row--split { grid-template-columns: 1fr; }
  .rfq__form { padding: 28px 20px; }
  .gallery, .cert-grid, .resource-grid, .channel-grid { grid-template-columns: 1fr; }
  .proof__stats, .proof__stats--wide { grid-template-columns: repeat(2, 1fr); }
  .spec-table th { width: 44%; padding: 14px 16px; }
  .spec-table td { padding: 14px 16px; }
  .industry-nav { top: 64px; }
  .float-contact { right: 14px; bottom: 16px; }
  .float-contact__btn { width: 46px; height: 46px; }
}