:root {
  --ink: #16181b;
  --muted: #646a73;
  --line: #e7e9ec;
  --paper: #ffffff;
  --soft: #f5f6f7;
  --charcoal: #20252b;
  --orange: #f07a22;
  --orange-dark: #ce5f12;
  --green: #25d366;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.top-strip {
  background: #252a30;
  color: #f4f4f4;
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 7px max(20px, calc((100vw - var(--max)) / 2));
  font-size: 13px;
}

.top-strip a { color: #fff; font-weight: 700; }

.navbar {
  max-width: var(--max);
  margin: 0 auto;
  min-height: 76px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 210px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: var(--orange);
  color: #fff;
  font-weight: 800;
  font-size: 24px;
}

.brand strong,
.brand small { display: block; line-height: 1.05; }
.brand strong { font-size: 22px; letter-spacing: .2px; }
.brand small { color: var(--muted); margin-top: 4px; font-size: 12px; text-transform: uppercase; }

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 24px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
}

.nav-links a { color: #343941; }
.nav-links a:hover { color: var(--orange); }
.nav-cta {
  background: var(--orange);
  color: #fff !important;
  padding: 11px 18px;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 70px 20px 60px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 470px);
  gap: 56px;
  align-items: center;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  font-size: clamp(44px, 6vw, 82px);
  line-height: .98;
  margin-bottom: 24px;
}
h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.1;
  margin-bottom: 18px;
}
h3 { font-size: 20px; line-height: 1.25; margin-bottom: 10px; }

.lead {
  color: #3e454e;
  font-size: 19px;
  max-width: 650px;
}

.hero-actions,
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  font-weight: 800;
  border: 1px solid transparent;
  transition: .2s ease;
}
.btn.primary { background: var(--orange); color: #fff; }
.btn.primary:hover { background: var(--orange-dark); }
.btn.ghost { border-color: #cfd3d7; color: var(--ink); background: #fff; }
.btn.ghost:hover { border-color: var(--orange); color: var(--orange); }

.hero-stats {
  padding: 0;
  gap: 22px;
}
.hero-stats div {
  min-width: 145px;
  padding-top: 18px;
  border-top: 3px solid var(--orange);
}
.hero-stats dt { font-size: 25px; font-weight: 900; }
.hero-stats dd { margin: 2px 0 0; color: var(--muted); font-size: 14px; }

.hero-media {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  background: var(--soft);
  box-shadow: 0 24px 70px rgba(21, 26, 31, .16);
}
.hero-media img {
  width: 100%;
  height: 100%;
  min-height: 560px;
  object-fit: cover;
}
.media-note {
  position: absolute;
  left: 18px;
  bottom: 18px;
  background: rgba(255,255,255,.94);
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 800;
}

.intro-band {
  background: var(--charcoal);
  color: #fff;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.intro-band div {
  padding: 32px max(20px, calc((100vw - var(--max)) / 2 + 20px));
  border-right: 1px solid rgba(255,255,255,.12);
}
.intro-band strong { display: block; font-size: 18px; margin-bottom: 6px; }
.intro-band span { color: #cbd0d5; font-size: 14px; }

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 86px 20px;
}
.section-head {
  max-width: 780px;
  margin-bottom: 36px;
}
.section-head p:not(.section-label),
.split-copy p,
.company-copy p { color: var(--muted); }
.section-label {
  color: var(--orange);
  font-weight: 900;
  text-transform: uppercase;
  font-size: 13px;
  margin-bottom: 10px;
}

.material-grid,
.advantage-grid,
.honor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.material-grid article,
.case-grid article,
.advantage-grid article,
.honor-grid figure {
  border: 1px solid var(--line);
  background: #fff;
}
.material-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.material-grid h3,
.material-grid p,
.case-grid h3,
.case-grid p { padding-left: 18px; padding-right: 18px; }
.material-grid h3 { padding-top: 18px; }
.material-grid p,
.case-grid p { color: var(--muted); font-size: 14px; padding-bottom: 18px; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  gap: 48px;
  align-items: center;
}
.split-media video,
.video-row video {
  width: 100%;
  background: #111;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.process-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.process-list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 13px;
  color: var(--muted);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.process-list span {
  grid-row: span 2;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--orange);
  color: #fff;
  font-weight: 900;
}
.process-list strong { color: var(--ink); display: block; }

.specs { background: var(--soft); max-width: none; }
.specs .section-head,
.spec-layout {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}
.spec-layout {
  display: grid;
  grid-template-columns: 330px 1fr;
  gap: 36px;
  align-items: center;
}
.spec-layout img {
  width: 100%;
  background: #fff;
  border: 1px solid var(--line);
  padding: 22px;
}
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}
th, td {
  text-align: left;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}
th { width: 32%; color: #30343a; }
td { color: var(--muted); }

.dark-section {
  max-width: none;
  background: var(--charcoal);
  color: #fff;
}
.dark-section .section-head,
.dark-section .advantage-grid {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}
.dark-section .section-head p:not(.section-label) { color: #c7ccd2; }
.advantage-grid { grid-template-columns: repeat(3, 1fr); }
.advantage-grid article {
  background: #2b3138;
  border-color: rgba(255,255,255,.1);
  padding: 26px;
}
.advantage-grid span {
  color: var(--orange);
  font-weight: 900;
  font-size: 13px;
}
.advantage-grid p { color: #c7ccd2; margin-bottom: 0; }

.case-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr .8fr;
  gap: 22px;
}
.case-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.case-large {
  grid-row: span 2;
  display: grid;
}
.case-large img { aspect-ratio: auto; height: 100%; min-height: 460px; }
.video-row {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.company {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  gap: 46px;
  align-items: center;
}
.company-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.company-points span {
  border: 1px solid var(--line);
  padding: 9px 12px;
  font-size: 13px;
  font-weight: 800;
  background: #fff;
}
.company-media {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.company-media img:first-child {
  grid-column: span 2;
  aspect-ratio: 16 / 9;
}
.company-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.honors {
  max-width: none;
  background: var(--soft);
}
.honors .section-head,
.honor-grid {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}
.honor-grid figure { margin: 0; padding: 14px; }
.honor-grid img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: #fafafa;
}
.honor-grid figcaption {
  font-weight: 800;
  text-align: center;
  padding: 12px 0 2px;
}

.faq-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 18px;
}
details {
  border: 1px solid var(--line);
  padding: 18px 20px;
  background: #fff;
}
summary {
  cursor: pointer;
  font-weight: 900;
  color: var(--ink);
}
details p { color: var(--muted); margin: 12px 0 0; }

.contact {
  max-width: none;
  background: linear-gradient(90deg, #252a30 0%, #252a30 50%, #f5f6f7 50%, #f5f6f7 100%);
}
.contact-card {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 440px;
  gap: 52px;
  align-items: start;
  color: #fff;
}
.contact-card p { color: #d8dde2; }
.contact-list {
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.contact-list a { color: #fff; text-decoration: underline; }
form {
  background: #fff;
  color: var(--ink);
  padding: 28px;
  border: 1px solid var(--line);
  box-shadow: 0 22px 60px rgba(18, 22, 26, .12);
}
label {
  display: grid;
  gap: 7px;
  font-size: 13px;
  font-weight: 900;
  margin-bottom: 15px;
}
input, textarea {
  width: 100%;
  border: 1px solid #d5d9de;
  padding: 13px 12px;
  font: inherit;
}
textarea { resize: vertical; }

.site-footer {
  background: #171a1f;
  color: #e8ebee;
  padding: 58px 20px 24px;
}
.footer-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 36px;
}
.footer-logo {
  color: #fff;
  font-size: 28px;
  font-weight: 900;
  margin-bottom: 14px;
}
.site-footer p { color: #aeb5bd; }
.site-footer h3 { color: #fff; font-size: 16px; }
.site-footer a {
  display: block;
  color: #aeb5bd;
  margin: 8px 0;
  font-size: 14px;
}
.site-footer a:hover { color: var(--orange); }
.footer-bottom {
  max-width: var(--max);
  margin: 32px auto 0;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,.12);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: #aeb5bd;
  font-size: 13px;
}
.footer-bottom a { display: inline; margin: 0; }

.whatsapp-float {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 60;
  min-width: 58px;
  height: 58px;
  border-radius: 50px;
  background: var(--green);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  font-weight: 900;
  box-shadow: 0 12px 30px rgba(0,0,0,.28);
}

@media (max-width: 980px) {
  .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: 113px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 18px 20px 24px;
  }
  .nav-links.is-open { display: flex; }
  .menu-toggle { display: grid; place-items: center; }
  .hero,
  .split,
  .company,
  .contact-card {
    grid-template-columns: 1fr;
  }
  .hero { padding-top: 44px; }
  .hero-media,
  .hero-media img { min-height: 420px; }
  .intro-band,
  .material-grid,
  .advantage-grid,
  .honor-grid,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .spec-layout,
  .case-grid,
  .video-row,
  .faq-list {
    grid-template-columns: 1fr;
  }
  .case-large img { min-height: 0; aspect-ratio: 4 / 3; }
  .contact { background: var(--charcoal); }
}

@media (max-width: 640px) {
  .top-strip { display: none; }
  .navbar { min-height: 68px; }
  .nav-links { top: 68px; }
  h1 { font-size: 42px; }
  .lead { font-size: 17px; }
  .hero,
  .section { padding-left: 16px; padding-right: 16px; }
  .hero-actions .btn { width: 100%; }
  .intro-band,
  .material-grid,
  .advantage-grid,
  .honor-grid,
  .footer-grid,
  .company-media {
    grid-template-columns: 1fr;
  }
  .intro-band div { padding: 24px 16px; border-bottom: 1px solid rgba(255,255,255,.12); }
  .company-media img:first-child { grid-column: auto; }
  form { padding: 20px; }
  .footer-bottom { flex-direction: column; }
  .whatsapp-float { height: 52px; right: 14px; bottom: 14px; }
}