/* ═══════════════════════════════════════
   LIGHT STEEL CONSTRUCTION — WEBSITE CSS
   ═══════════════════════════════════════ */

:root {
  --orange: #D4510A;
  --orange-light: #E8682A;
  --dark: #1A1A1A;
  --dark2: #242424;
  --gray: #555;
  --light: #F6F5F3;
  --white: #fff;
  --font-display: 'Montserrat', sans-serif;
  --font-body: 'Montserrat', sans-serif;
  --nav-h: 72px;
  --radius: 4px;
  --shadow: 0 4px 32px rgba(0,0,0,.12);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--dark);
  background: var(--white);
  overflow-x: hidden;
}

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

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── REVEAL ANIMATION ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.reveal-delay { transition-delay: 0.15s; }
.reveal-delay2 { transition-delay: 0.3s; }

/* ═══ NAV ═══ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background 0.3s, box-shadow 0.3s;
}
#nav.scrolled {
  background: var(--dark);
  box-shadow: 0 2px 20px rgba(0,0,0,.4);
}
.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo img {
  height: 36px;
  width: auto;
  object-fit: contain;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.85);
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--orange-light); }
.nav-cta {
  background: var(--orange) !important;
  color: var(--white) !important;
  padding: 8px 20px;
  border-radius: var(--radius);
  transition: background 0.2s !important;
}
.nav-cta:hover { background: var(--orange-light) !important; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.burger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  transition: 0.3s;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--dark);
  z-index: 999;
  padding: 16px 0 24px;
  border-top: 2px solid var(--orange);
}
.mobile-menu.open { display: block; }
.mobile-menu ul { padding: 0 24px; }
.mobile-menu li { border-bottom: 1px solid rgba(255,255,255,.07); }
.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
  color: var(--white);
  text-transform: uppercase;
}

/* ═══ HERO ═══ */
#hero {
  position: relative;
  height: 100vh;
  min-height: 620px;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(20,20,20,.88) 40%, rgba(20,20,20,.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  padding-top: var(--nav-h);
}
.hero-badge {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 14px;
  margin-bottom: 20px;
  animation: fadeUp 0.8s ease both;
}
.hero-title {
  display: flex;
  flex-direction: column;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 0.92;
  text-transform: uppercase;
  animation: fadeUp 0.8s 0.1s ease both;
}
.hero-title-line1 {
  font-size: clamp(60px, 10vw, 110px);
  color: var(--white);
  letter-spacing: -0.01em;
}
.hero-title-line2 {
  font-size: clamp(28px, 4.5vw, 50px);
  color: var(--orange);
  letter-spacing: 0.05em;
}
.hero-sub {
  font-size: 16px;
  color: rgba(255,255,255,.65);
  font-style: italic;
  margin-top: 14px;
  animation: fadeUp 0.8s 0.2s ease both;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 32px 0;
  animation: fadeUp 0.8s 0.3s ease both;
}
.stat { text-align: left; }
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 36px;
  color: var(--orange);
  line-height: 1;
}
.stat-lbl {
  display: block;
  font-size: 12px;
  color: rgba(255,255,255,.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}
.stat-div {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,.2);
}
.hero-actions {
  display: flex;
  gap: 14px;
  animation: fadeUp 0.8s 0.4s ease both;
}
.btn-primary {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 14px 30px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}
.btn-primary:hover { background: var(--orange-light); transform: translateY(-2px); }
.btn-outline {
  display: inline-block;
  border: 2px solid rgba(255,255,255,.4);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 28px;
  border-radius: var(--radius);
  transition: border-color 0.2s, color 0.2s;
}
.btn-outline:hover { border-color: var(--orange); color: var(--orange); }
.btn-full { width: 100%; text-align: center; }
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.hero-scroll span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255,255,255,.4);
  border-radius: 12px;
  position: relative;
}
.hero-scroll span::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--orange);
  border-radius: 2px;
  animation: scrollDot 1.6s infinite;
}

/* ═══ SECTIONS ═══ */
section { padding: 96px 0; }
.dark-section { background: var(--dark2); color: var(--white); }

.section-tag {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 12px;
}
.section-tag.light { color: var(--orange-light); }
.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-title em {
  font-style: normal;
  color: var(--orange);
}
.section-title.light { color: var(--white); }
.section-desc { font-size: 16px; color: rgba(255,255,255,.6); max-width: 540px; }
.section-header { margin-bottom: 56px; }

/* ═══ ABOUT ═══ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
  margin-bottom: 72px;
}
.about-text {
  color: var(--gray);
  line-height: 1.75;
  margin-bottom: 16px;
  font-size: 15.5px;
}
.about-nums {
  display: flex;
  gap: 32px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid #eee;
}
.an-item { display: flex; flex-direction: column; }
.an-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 38px;
  color: var(--orange);
  line-height: 1;
}
.an-lbl { font-size: 12px; color: var(--gray); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.04em; }
.about-img-wrap {
  position: relative;
  border-radius: 2px;
  overflow: hidden;
  aspect-ratio: 4/3;
}
.about-img-wrap img { width: 100%; height: 100%; }
.about-img-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: var(--orange);
  color: var(--white);
  padding: 14px 20px;
  border-radius: var(--radius);
}
.aib-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 32px;
  line-height: 1;
}
.aib-lbl { font-size: 11px; opacity: .85; margin-top: 2px; }

/* Timeline */
.timeline {
  display: flex;
  align-items: flex-start;
  gap: 0;
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 7px;
  left: 0; right: 0;
  height: 2px;
  background: #ddd;
  z-index: 0;
}
.tl-item { flex: 1; position: relative; z-index: 1; }
.tl-line { display: none; }
.tl-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #ccc;
  border: 2px solid #ccc;
  margin-bottom: 12px;
}
.tl-dot-mid { background: var(--gray); border-color: var(--gray); }
.tl-dot-active { background: var(--orange); border-color: var(--orange); width: 18px; height: 18px; }
.tl-year {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  color: var(--gray);
  margin-bottom: 10px;
}
.tl-year-active { color: var(--orange); font-size: 22px; }
.tl-card {
  background: var(--light);
  padding: 20px;
  border-radius: var(--radius);
  border-top: 3px solid #ddd;
  max-width: 280px;
}
.tl-card-active {
  background: var(--orange);
  border-top-color: var(--orange);
  color: var(--white);
}
.tl-card h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.tl-card-active h4 { color: var(--white); }
.tl-card p { font-size: 13px; color: var(--gray); line-height: 1.6; }
.tl-card-active p { color: rgba(255,255,255,.85); }

/* ═══ PRODUCTS ═══ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.product-card {
  background: var(--dark);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.08);
  transition: transform 0.3s, border-color 0.3s;
}
.product-card:hover { transform: translateY(-6px); border-color: var(--orange); }
.product-card-featured { border-color: var(--orange); }
.product-img {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}
.product-img img { transition: transform 0.5s; }
.product-card:hover .product-img img { transform: scale(1.05); }
.product-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(0,0,0,.65);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 2px;
}
.product-badge-active { background: var(--orange); }
.product-body { padding: 24px; }
.product-size {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 3rem;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 8px;
}
.product-size span { font-size: 1.2rem; }
.product-body h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 10px;
}
.product-body p { font-size: 13.5px; color: rgba(255,255,255,.55); line-height: 1.65; margin-bottom: 16px; }
.product-features { display: flex; flex-direction: column; gap: 6px; }
.product-features li {
  font-size: 12.5px;
  color: rgba(255,255,255,.7);
  padding-left: 16px;
  position: relative;
}
.product-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--orange);
  border-radius: 50%;
}
.capacity-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  background: rgba(212,81,10,.12);
  border: 1px solid rgba(212,81,10,.3);
  padding: 20px 28px;
  border-radius: var(--radius);
}
.cap-icon { font-size: 28px; }
.cap-text { flex: 1; }
.cap-text strong { display: block; color: var(--white); font-size: 15px; margin-bottom: 4px; }
.cap-text span { font-size: 13px; color: rgba(255,255,255,.5); }
.cap-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 40px;
  color: var(--orange);
  line-height: 1;
}
.cap-num span { font-size: 16px; color: rgba(255,255,255,.5); }

/* ═══ ADVANTAGES ═══ */
.adv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}
.adv-img {
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  border-radius: 2px;
  overflow: hidden;
  aspect-ratio: 3/4;
}
.adv-list { display: flex; flex-direction: column; gap: 0; }
.adv-item {
  display: flex;
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid #eee;
}
.adv-item:first-child { padding-top: 0; }
.adv-icon { font-size: 28px; flex-shrink: 0; margin-top: 2px; }
.adv-body h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  text-transform: uppercase;
  color: var(--dark);
  margin-bottom: 8px;
}
.adv-body p { font-size: 14px; color: var(--gray); line-height: 1.7; }

/* ═══ APPLICATIONS ═══ */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.app-card {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  animation-delay: var(--delay);
}
.app-card img { transition: transform 0.5s; }
.app-card:hover img { transform: scale(1.08); }
.app-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.75) 0%, rgba(0,0,0,.4) 20%, transparent 45%);
  display: flex;
  align-items: flex-end;
  padding: 20px;
  opacity: 1;
}
.app-overlay h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  text-transform: uppercase;
  color: var(--white);
  letter-spacing: 0.03em;
}
.app-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--orange);
  z-index: 2;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s;
}
.app-card:hover::before { transform: scaleX(1); }

/* ═══ PROMO ═══ */
#promo { background: var(--light); padding: 80px 0; }
.promo-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.promo-left { padding: 56px; }
.promo-left h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 3vw, 40px);
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: 28px;
}
.promo-left h2 em { font-style: normal; color: var(--orange); }
.promo-list { margin-bottom: 32px; display: flex; flex-direction: column; gap: 12px; }
.promo-list li {
  font-size: 14.5px;
  color: var(--gray);
  padding-left: 24px;
  position: relative;
  line-height: 1.6;
}
.promo-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--orange);
  border-radius: 50%;
}
.promo-right {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.promo-right img { width: 100%; height: 100%; }

/* ═══ FAQ ═══ */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}
.faq-item {
  padding: 28px 32px;
  border-bottom: 1px solid #eee;
  border-right: 1px solid #eee;
  transition: background 0.2s;
}
.faq-item:hover { background: var(--light); }
.faq-item:nth-child(2n) { border-right: none; }
.faq-q {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  text-transform: uppercase;
  color: var(--dark);
  margin-bottom: 10px;
  padding-left: 18px;
  position: relative;
}
.faq-q::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 18px;
  background: var(--orange);
  border-radius: 2px;
}
.faq-a { font-size: 14px; color: var(--gray); line-height: 1.7; }

/* ═══ CONTACT ═══ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}
.contact-sub { color: rgba(255,255,255,.6); font-size: 15px; line-height: 1.7; margin-bottom: 36px; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-social-btns { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.btn-facebook, .btn-viber {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  color: #fff;
  border-radius: 8px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  transition: background .2s, transform .2s;
}
.btn-facebook { background: #1877F2; }
.btn-facebook:hover { background: #1560cc; transform: translateY(-2px); }
.btn-viber { background: #7360f2; }
.btn-viber:hover { background: #5b4bcc; transform: translateY(-2px); }
/* Messenger floating button */
.messenger-fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00c6ff, #0078ff);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0,120,255,.45);
  z-index: 9999;
  transition: transform .2s, box-shadow .2s;
}
.messenger-fab:hover { transform: scale(1.1); box-shadow: 0 6px 22px rgba(0,120,255,.55); }
.ci-item { display: flex; gap: 16px; align-items: flex-start; }
.ci-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.ci-item strong { display: block; color: var(--white); font-size: 15px; margin-bottom: 2px; }
.ci-item span { font-size: 12.5px; color: rgba(255,255,255,.45); line-height: 1.5; }

.contact-form {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  padding: 36px;
  border-radius: var(--radius);
}
.contact-form h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 28px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,.5);
  margin-bottom: 7px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 12px 14px;
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s;
  appearance: none;
  resize: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,.3); }
.form-group select option { background: var(--dark2); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--orange); }
.form-success {
  display: none;
  margin-top: 14px;
  text-align: center;
  font-size: 14px;
  padding: 12px;
  border-radius: var(--radius);
}
.form-success-ok {
  color: #7fda7f;
  background: rgba(127,218,127,.1);
}
.form-success-err {
  color: #ff7f7f;
  background: rgba(255,127,127,.1);
}

/* ── Phone hint ── */
.form-hint {
  display: block;
  font-size: 11px;
  color: #888;
  margin-top: 5px;
}
.form-hint-warn { color: #e8a020; }
.form-hint-ok   { color: #7fda7f; }
.form-hint-err  { color: #ff7f7f; }

/* ═══ FOOTER ═══ */
footer {
  background: #111;
  padding: 48px 0 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  flex-wrap: wrap;
}
.footer-logo img { height: 32px; width: auto; object-fit: contain; margin-bottom: 10px; }
.footer-logo p { font-size: 12px; color: rgba(255,255,255,.35); font-style: italic; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,.5); transition: color 0.2s; }
.footer-links a:hover { color: var(--orange-light); }
.footer-contact { display: flex; flex-direction: column; gap: 10px; }
.footer-contact a { font-size: 13px; color: rgba(255,255,255,.5); transition: color 0.2s; }
.footer-contact a:hover { color: var(--orange-light); }
.footer-bottom { padding: 20px 0; text-align: center; }
.footer-bottom p { font-size: 12px; color: rgba(255,255,255,.2); }

/* ═══ ANIMATIONS ═══ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}
@keyframes scrollDot {
  0% { top: 6px; opacity: 1; }
  80% { top: 22px; opacity: 0; }
  100% { top: 6px; opacity: 0; }
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .burger { display: flex; }
  .about-grid, .adv-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .adv-img { position: static; aspect-ratio: 16/9; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .apps-grid { grid-template-columns: repeat(2, 1fr); }
  .promo-inner { grid-template-columns: 1fr; }
  .promo-right { aspect-ratio: 16/9; }
  .promo-left { padding: 36px; }
  .tl-card { max-width: 100%; }
  .faq-grid { grid-template-columns: 1fr; }
  .faq-item { border-right: none; }
  .footer-inner { flex-direction: column; gap: 28px; }
}

@media (max-width: 600px) {
  section { padding: 56px 0; }

  /* Hero */
  #hero { overflow: hidden; }
  .hero-title-line1 { font-size: clamp(40px, 13vw, 60px); }
  .hero-title-line2 { font-size: clamp(20px, 6vw, 30px); }
  .hero-actions { flex-direction: column; gap: 10px; }
  .hero-actions .btn-primary,
  .hero-actions .btn-outline { width: 100%; text-align: center; }
  .hero-stats { gap: 14px; flex-wrap: wrap; }
  .stat-div { display: none; }
  .stat-num { font-size: 28px; }

  /* About */
  .about-nums { gap: 16px; flex-wrap: wrap; }
  .an-num { font-size: 30px; }

  /* Products */
  .products-grid { grid-template-columns: 1fr; }
  .capacity-bar { flex-wrap: wrap; gap: 12px; }
  .cap-num { font-size: 32px; }

  /* Applications */
  .apps-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .app-card { aspect-ratio: 3/4; }
  .app-overlay h4 { font-size: 13px; }

  /* Promo */
  .promo-left { padding: 24px; }
  .promo-right { display: none; }

  /* FAQ */
  .faq-item { padding: 20px 16px; }
  .faq-q { font-size: 14px; }

  /* Contact */
  .contact-form { padding: 20px; }
  .contact-grid { gap: 28px; }

  /* Footer */
  .footer-inner { gap: 20px; }
  .container { padding: 0 16px; }

  /* Section headings */
  .section-header { margin-bottom: 36px; }

  /* Timeline — horizontal, full background line */
  .timeline { gap: 0; position: relative; }
  .timeline::before {
    content: '';
    position: absolute;
    top: 7px;
    left: 0; right: 0;
    height: 2px;
    background: #ddd;
    z-index: 0;
  }
  .tl-line { display: none; }
  .tl-item { min-width: 0; flex: 1; display: flex; flex-direction: column; align-items: center; position: relative; z-index: 1; }
  .tl-dot { position: relative; z-index: 2; background-clip: padding-box; }
  .tl-dot-active { width: 14px; height: 14px; }
  .tl-year-active { font-size: 15px; }
  .tl-year { font-size: 15px; margin-bottom: 8px; }
  .tl-card { padding: 10px 8px; width: 100%; }
  .tl-card h4 { font-size: 11px; margin-bottom: 0; }
  .tl-card p { display: none; }
}