:root {
  --bg: #050911;
  --panel: #0a111d;
  --panel-soft: #0d1726;
  --line: rgba(153, 199, 255, 0.18);
  --text: #f5f8ff;
  --muted: #aeb8cb;
  --blue: #18b8ff;
  --violet: #6e5cff;
  --glow: rgba(19, 158, 255, 0.45);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 73% 6%, rgba(32, 88, 173, 0.22), transparent 35%), var(--bg);
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(18px, 6vw, 86px);
  background: rgba(3, 7, 13, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}
.brand { display: grid; line-height: 1; }
.brand span { font-size: 28px; font-weight: 800; }
.brand small { color: var(--muted); font-size: 9px; letter-spacing: 1.3px; }
.desktop-nav { display: flex; gap: 34px; font-size: 13px; color: #e8edf8; }
.desktop-nav a::after { content: "⌄"; margin-left: 7px; font-size: 9px; opacity: 0.75; }
.desktop-nav a:nth-last-child(-n+2)::after { content: ""; }
.header-actions { display: flex; align-items: center; gap: 20px; }
.phone { font-size: 13px; font-weight: 700; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}
.btn::after { content: "→"; margin-left: 13px; }
.btn-primary { background: linear-gradient(135deg, #6757ff, #2b70ff); box-shadow: 0 0 28px rgba(63, 94, 255, 0.26); }
.btn-ghost, .btn-outline { border-color: rgba(255, 255, 255, 0.24); background: rgba(255, 255, 255, 0.03); }
.menu-toggle { display: none; background: none; border: 0; width: 36px; }
.menu-toggle span { display: block; height: 2px; margin: 7px 0; background: white; }

.hero { position: relative; min-height: 610px; display: grid; align-items: end; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero-media {
  position: absolute; inset: 0;
  background: url("assets/hero-led-atrium.png") center right / cover no-repeat;
  filter: saturate(1.06) contrast(1.08);
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 7, 13, 0.98) 0%, rgba(5, 9, 17, 0.86) 26%, rgba(5, 9, 17, 0.24) 62%, rgba(5, 9, 17, 0.35) 100%),
    linear-gradient(180deg, rgba(5, 9, 17, 0.15), rgba(5, 9, 17, 0.96));
}
.hero-content { position: relative; padding: 145px 0 38px; }
.hero-copy { width: min(640px, 100%); }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(40px, 5vw, 54px); line-height: 1.05; margin-bottom: 20px; letter-spacing: 0; }
h1 span, h2 span { color: var(--blue); }
.hero-copy p { color: #eff4ff; font-size: 17px; line-height: 1.7; width: min(540px, 100%); }
.hero-buttons { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }
.stats { display: flex; gap: 48px; margin-top: 68px; flex-wrap: wrap; }
.stats article { min-width: 112px; position: relative; padding-left: 25px; }
.stats article::before {
  content: ""; position: absolute; left: 0; top: 6px; width: 15px; height: 15px;
  border: 1px solid var(--violet); border-radius: 50%; box-shadow: 0 0 14px var(--glow);
}
.stats strong { display: block; font-size: 26px; }
.stats span { display: block; color: var(--muted); font-size: 11px; }

.brand-strip { padding: 22px 0 30px; border-bottom: 1px solid var(--line); background: rgba(5, 10, 18, 0.82); }
.brand-strip p { text-align: center; color: #9bb5d3; text-transform: uppercase; letter-spacing: 2.8px; font-size: 9px; margin-bottom: 22px; }
.brand-grid { width: min(1180px, calc(100% - 48px)); margin: 0 auto; display: grid; grid-template-columns: repeat(7, 1fr); align-items: center; gap: 26px; text-align: center; color: rgba(255, 255, 255, 0.82); }
.brand-grid span { font-family: Georgia, serif; font-size: 22px; line-height: 1; opacity: 0.9; }
.brand-grid small { font-family: Inter, sans-serif; font-size: 9px; text-transform: uppercase; }

.section { padding: 56px 0 22px; background: linear-gradient(180deg, rgba(7, 13, 23, 0.92), rgba(4, 8, 15, 0.96)); }
.section-head { display: grid; grid-template-columns: 1fr minmax(220px, 420px) auto; gap: 34px; align-items: end; margin-bottom: 26px; }
small { color: #6fbfff; text-transform: uppercase; letter-spacing: 2px; font-size: 10px; font-weight: 700; }
h2 { font-size: clamp(30px, 3vw, 42px); line-height: 1.08; margin-bottom: 0; }
.section-head p { color: var(--muted); line-height: 1.6; font-size: 13px; margin-bottom: 0; }
.card-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.image-card {
  position: relative;
  min-height: 246px;
  padding: 134px 16px 18px;
  border: 1px solid rgba(145, 190, 255, 0.17);
  border-radius: 6px;
  background: rgba(8, 15, 26, 0.82);
  overflow: hidden;
}
.image-card::after { content: "→"; position: absolute; right: 16px; bottom: 16px; color: #dbe9ff; }
.card-image, .story-img, .article-grid article::before, .thumbs span, .feature-image {
  background:
    radial-gradient(circle at 70% 26%, rgba(255,255,255,0.85), transparent 4%),
    linear-gradient(120deg, rgba(24,184,255,0.95), rgba(106,76,255,0.82) 45%, rgba(255,82,198,0.65)),
    linear-gradient(180deg, #263b56, #080d16);
}
.card-image { position: absolute; inset: 0 0 auto; height: 128px; background-size: cover; }
.card-image::after, .story-img::after, .feature-image::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(5, 9, 17, 0.9)), repeating-linear-gradient(90deg, transparent 0 28px, rgba(255,255,255,0.08) 29px 30px);
}
.image-card h3 { position: relative; font-size: 15px; margin-bottom: 10px; }
.image-card p { position: relative; color: #bec9dc; font-size: 12px; line-height: 1.55; margin: 0; }
.shot-retail .card-image, .shot-market, .shot-market::before { background-color: #311628; background-image: radial-gradient(circle at 70% 20%, #f8e6ff, transparent 4%), linear-gradient(120deg, #ff874a, #5035ff 44%, #11c9ff); }
.shot-transport .card-image { background-image: linear-gradient(120deg, #25415e, #1272d7 48%, #8df1ff); }
.shot-control .card-image, .shot-center { background-image: radial-gradient(circle at 50% 28%, #f9fbff, transparent 5%), linear-gradient(120deg, #0a1830, #0b70d8 45%, #18d9ff); }
.shot-hotel .card-image { background-image: linear-gradient(120deg, #d7a95b, #3150ff 45%, #0cd4ff); }
.shot-education .card-image { background-image: linear-gradient(120deg, #171f3a, #4b3dff 48%, #ff5cd2); }
.industry-grid .shot-corporate .card-image { background-image: url("assets/industry_1.png"); background-position: center; }
.industry-grid .shot-retail .card-image { background-image: url("assets/industry_2.png"); background-position: center; }
.industry-grid .shot-transport .card-image { background-image: url("assets/industry_3.png"); background-position: center; }
.industry-grid .shot-control .card-image { background-image: url("assets/industry_4.png"); background-position: center; }
.industry-grid .shot-hotel .card-image { background-image: url("assets/industry_5.png"); background-position: center; }
.industry-grid .shot-education .card-image { background-image: url("assets/industry_6.png"); background-position: center; }
.shot-indoor .card-image, .shot-indoor::before { background-image: linear-gradient(120deg, #171f37, #157cff 42%, #ffb24d); }
.shot-outdoor .card-image, .shot-outdoor::before, .shot-airport { background-image: linear-gradient(120deg, #263954, #1db5ff 47%, #fff0b4); }
.shot-transparent .card-image, .shot-transparent::before { background-image: linear-gradient(120deg, #0e172a, #7b53ff 48%, #10e0ff); }
.shot-cob .card-image, .shot-cob::before { background-image: linear-gradient(120deg, #140d22, #ff428f 45%, #1dd8ff); }
.shot-rental .card-image { background-image: linear-gradient(120deg, #131c31, #4a53ff 42%, #ff71d9); }
.shot-curved .card-image { background-image: linear-gradient(120deg, #1f1220, #ff8d5a 48%, #05c7ff); }
.product-grid .shot-indoor .card-image { background-image: url("assets/product-1.png"); background-position: center; }
.product-grid .shot-outdoor .card-image { background-image: url("assets/product-2.png"); background-position: center; }
.product-grid .shot-transparent .card-image { background-image: url("assets/product-3.png"); background-position: center; }
.product-grid .shot-cob .card-image { background-image: url("assets/product-4.png"); background-position: center; }
.product-grid .shot-rental .card-image { background-image: url("assets/product-5.png"); background-position: center; }
.product-grid .shot-curved .card-image { background-image: url("assets/product-6.png"); background-position: center; }

.featured { display: grid; grid-template-columns: 1.05fr 0.95fr; min-height: 420px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-image {
  position: relative;
  min-height: 420px;
  background: url("assets/featured-campus-main.png") center / cover no-repeat;
}
.feature-image .play,
.feature-image > span {
  display: none;
}
.play {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 72px; height: 72px; border: 0; border-radius: 50%; background: #fff; z-index: 2;
}
.play::after {
  content: ""; position: absolute; left: 29px; top: 23px;
  border-left: 18px solid #1d5bff; border-top: 13px solid transparent; border-bottom: 13px solid transparent;
}
.feature-image span { position: absolute; left: calc(50% + 52px); top: 50%; transform: translateY(-50%); z-index: 2; font-weight: 700; }
.feature-copy { padding: 58px min(8vw, 100px); background: radial-gradient(circle at 0% 0%, rgba(34, 92, 180, 0.18), transparent 45%), #070d16; }
.feature-copy h2 { margin-top: 10px; }
.feature-copy ul { display: flex; gap: 22px; flex-wrap: wrap; color: #bfcbe0; font-size: 12px; list-style: none; padding: 0; margin: 18px 0; }
.feature-copy p { color: var(--muted); line-height: 1.7; max-width: 520px; }
.thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 26px; max-width: 560px; }
.thumbs span { position: relative; height: 68px; border: 1px solid rgba(255,255,255,.25); border-radius: 4px; overflow: hidden; background-size: cover; background-position: center; }
.thumbs span:nth-child(1) { background-image: url("assets/campus-thumb-1.png"); }
.thumbs span:nth-child(2) { background-image: url("assets/campus-thumb-2.png"); }
.thumbs span:nth-child(3) { background-image: url("assets/campus-thumb-3.png"); }
.thumbs span:nth-child(4) { background-image: url("assets/campus-thumb-4.png"); }

.calculator { padding: 28px 0 42px; background: #050911; }
.calc-panel {
  display: grid;
  grid-template-columns: 1.2fr repeat(4, 1fr) 1fr;
  gap: 24px;
  align-items: center;
  padding: 28px 32px;
  border: 1px solid rgba(36, 143, 255, 0.72);
  border-radius: 8px;
  background: linear-gradient(90deg, rgba(12, 35, 67, 0.72), rgba(7, 20, 41, 0.95) 70%, rgba(25, 57, 119, 0.9));
  box-shadow: 0 0 45px rgba(22, 135, 255, 0.18);
}
.calc-title h2 { font-size: 29px; margin: 8px 0 8px; }
.calc-title p, label { color: #c2cce0; font-size: 12px; }
input, select {
  display: block; width: 100%; height: 44px; margin-top: 9px; padding: 0 13px;
  color: #f4f8ff; background: rgba(6, 15, 30, 0.78); border: 1px solid rgba(150, 194, 255, 0.2); border-radius: 4px;
}
.estimate { display: grid; gap: 10px; }
.estimate span { color: #b8c5d8; font-size: 12px; }
.estimate strong { color: #35aaff; font-size: 24px; line-height: 1.08; }

.process { padding: 34px 0 54px; background: linear-gradient(180deg, #050911, #070e18); }
.process-line { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; margin-top: 34px; }
.process article { text-align: center; color: #bac5d6; position: relative; }
.process article::before {
  content: ""; display: block; width: 82px; height: 82px; margin: 0 auto 10px;
  background: center / contain no-repeat;
  filter: drop-shadow(0 0 13px rgba(37, 189, 255, 0.22));
}
.process article:nth-child(1)::before { background-image: url("assets/process-icon-1.png"); }
.process article:nth-child(2)::before { background-image: url("assets/process-icon-2.png"); }
.process article:nth-child(3)::before { background-image: url("assets/process-icon-3.png"); }
.process article:nth-child(4)::before { background-image: url("assets/process-icon-4.png"); }
.process article:nth-child(5)::before { background-image: url("assets/process-icon-5.png"); }
.process article:nth-child(6)::before { background-image: url("assets/process-icon-6.png"); }
.process article:not(:last-child)::after {
  content: "→";
  position: absolute;
  top: 30px;
  right: -18px;
  color: #36c8ff;
  font-size: 24px;
  text-shadow: 0 0 16px rgba(54, 200, 255, 0.52);
}
.process b { color: white; font-size: 21px; }
.process h3 { font-size: 13px; margin: 7px 0; color: #fff; }
.process p { font-size: 10px; line-height: 1.45; margin: 0; }

.story-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.story-grid article { display: grid; grid-template-columns: 150px 1fr; column-gap: 18px; padding: 14px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.025); }
.story-img { position: relative; min-height: 132px; border-radius: 4px; grid-row: span 4; overflow: hidden; }
.story-grid article:nth-child(1) .story-img { background: url("assets/story-1.png") center / cover no-repeat; }
.story-grid article:nth-child(2) .story-img { background: url("assets/story-2.png") center / cover no-repeat; }
.story-grid article:nth-child(3) .story-img { background: url("assets/story-3.png") center / cover no-repeat; }
.story-grid h3 { margin: 4px 0 3px; font-size: 15px; }
.story-grid p { color: #d8e0ef; font-size: 12px; line-height: 1.6; margin: 14px 0 0; }

.article-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.article-grid article {
  position: relative; min-height: 196px; padding: 108px 14px 16px; overflow: hidden;
  border: 1px solid var(--line); border-radius: 6px; background: #0b121f;
}
.article-grid article::before { content: ""; position: absolute; inset: 0 0 auto; height: 98px; }
.article-grid article:nth-child(1)::before { background: url("assets/knowledge-1.png") center / cover no-repeat; }
.article-grid article:nth-child(2)::before { background: url("assets/knowledge-2.png") center / cover no-repeat; }
.article-grid article:nth-child(3)::before { background: url("assets/knowledge-3.png") center / cover no-repeat; }
.article-grid article:nth-child(4)::before { background: url("assets/knowledge-4.png") center / cover no-repeat; }
.article-grid article:nth-child(5)::before { background: url("assets/knowledge-5.png") center / cover no-repeat; }
.article-grid span { position: relative; color: #ff7b6f; text-transform: uppercase; font-size: 9px; font-weight: 700; }
.article-grid h3 { position: relative; font-size: 14px; line-height: 1.35; margin: 8px 0 9px; }
.article-grid time { position: relative; color: #9eacbf; font-size: 11px; }

.footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(5, 9, 17, .95), #04070d), radial-gradient(circle at 0 0, rgba(35,99,190,.18), transparent 40%);
  padding: 36px 0 20px;
}
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 44px; }
.footer h2 { font-size: 30px; }
.footer h3 { font-size: 13px; margin: 0 0 14px; }
.footer p, .footer a { display: block; color: #aeb8c9; font-size: 12px; line-height: 1.8; margin-bottom: 5px; }
.footnote { display: flex; justify-content: space-between; gap: 20px; margin-top: 26px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.08); color: #8c98aa; font-size: 11px; }

@media (max-width: 1080px) {
  .desktop-nav, .phone { display: none; }
  .menu-toggle { display: block; }
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .section-head, .featured, .calc-panel, .footer-grid { grid-template-columns: 1fr; }
  .process-line { grid-template-columns: repeat(3, 1fr); }
  .process article:not(:last-child)::after { display: none; }
  .brand-grid { grid-template-columns: repeat(4, 1fr); }
  .story-grid, .article-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .container { width: min(100% - 28px, 1180px); }
  .site-header { padding: 0 14px; }
  .header-actions .btn { display: none; }
  .hero { min-height: 690px; }
  .hero-content { padding-top: 112px; }
  .stats { gap: 22px; }
  .card-grid, .process-line, .brand-grid { grid-template-columns: 1fr 1fr; }
  .industry-grid, .product-grid { grid-template-columns: 1fr; }
  .story-grid article { grid-template-columns: 1fr; }
  .story-img { min-height: 180px; margin-bottom: 12px; }
  .footnote { flex-direction: column; }
}