/* ===== LED Banner Official Site — Dark Tech Theme ===== */
:root {
  --bg: #05060f;
  --bg-2: #0a0d1f;
  --panel: rgba(255, 255, 255, 0.04);
  --panel-border: rgba(255, 255, 255, 0.09);
  --text: #eef1ff;
  --text-dim: #9aa3c0;
  --cyan: #00e5ff;
  --pink: #ff2d78;
  --yellow: #ffd400;
  --violet: #8b5cff;
  --green: #2dff9d;
  --orange: #ff8a2d;
  --grad: linear-gradient(92deg, var(--cyan), var(--violet) 55%, var(--pink));
  --radius: 18px;
  --font: "Space Grotesk", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
}

.glow-orb {
  position: fixed;
  z-index: -2;
  width: 46vmax;
  height: 46vmax;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.28;
  pointer-events: none;
}
.orb-1 { top: -18vmax; left: -12vmax; background: radial-gradient(circle, #00e5ff, transparent 65%); }
.orb-2 { bottom: -22vmax; right: -14vmax; background: radial-gradient(circle, #ff2d78, transparent 65%); }

/* ===== Nav ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(20px, 5vw, 64px);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(5, 6, 15, 0.55);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled {
  border-bottom-color: var(--panel-border);
  background: rgba(5, 6, 15, 0.82);
}

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand-mark { display: inline-flex; gap: 4px; padding: 7px 9px; background: #000; border: 1px solid var(--panel-border); border-radius: 8px; box-shadow: 0 0 14px rgba(0, 229, 255, 0.25); }
.brand-mark i { width: 6px; height: 6px; border-radius: 50%; }
.brand-mark i:nth-child(1) { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.brand-mark i:nth-child(2) { background: var(--pink); box-shadow: 0 0 8px var(--pink); }
.brand-mark i:nth-child(3) { background: var(--yellow); box-shadow: 0 0 8px var(--yellow); }
.brand-text { font-weight: 700; font-size: 18px; letter-spacing: 0.5px; }
.brand-text span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }

/* Language switcher */
.lang-switcher { position: relative; }
.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}
.lang-btn:hover { border-color: rgba(0, 229, 255, 0.5); background: rgba(255, 255, 255, 0.07); }
.lang-btn .chev { transition: transform .25s; }
.lang-switcher.open .chev { transform: rotate(180deg); }

.lang-menu {
  position: absolute;
  top: calc(100% + 10px);
  inset-inline-end: 0;
  min-width: 210px;
  max-height: 320px;
  overflow-y: auto;
  list-style: none;
  background: rgba(13, 16, 33, 0.96);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 6px;
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.55);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .2s, transform .2s, visibility .2s;
}
.lang-switcher.open .lang-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-menu li {
  padding: 9px 14px;
  border-radius: 9px;
  font-size: 14px;
  cursor: pointer;
  color: var(--text-dim);
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.lang-menu li:hover { background: rgba(255, 255, 255, 0.07); color: var(--text); }
.lang-menu li.active { color: var(--cyan); background: rgba(0, 229, 255, 0.09); }

/* ===== Hero ===== */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
  padding: clamp(48px, 8vh, 110px) clamp(20px, 5vw, 64px);
  max-width: 1280px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid rgba(0, 229, 255, 0.35);
  background: rgba(0, 229, 255, 0.08);
  color: var(--cyan);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.3px;
  margin-bottom: 26px;
}
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: .45; transform: scale(.8); } }

.hero h1 {
  font-size: clamp(34px, 4.6vw, 62px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 22px;
}
.hero h1 span { display: block; }
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 22px rgba(139, 92, 255, 0.35));
}

.hero-sub {
  color: var(--text-dim);
  font-size: clamp(15.5px, 1.4vw, 18px);
  max-width: 560px;
  margin-bottom: 36px;
}

.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 14px;
  font-family: var(--font);
  font-size: 15.5px;
  font-weight: 600;
  text-decoration: none;
  color: #05060f;
  transition: transform .2s, box-shadow .2s, background .2s;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--grad);
  box-shadow: 0 8px 28px rgba(0, 229, 255, 0.28), 0 4px 16px rgba(255, 45, 120, 0.22);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 38px rgba(0, 229, 255, 0.4), 0 6px 20px rgba(255, 45, 120, 0.3); }
.btn-ghost {
  color: var(--text);
  background: var(--panel);
  border-color: var(--panel-border);
}
.btn-ghost:hover { border-color: rgba(139, 92, 255, 0.55); background: rgba(139, 92, 255, 0.1); }
.btn-lg { padding: 17px 34px; font-size: 17px; }

/* Phone mockup */
.hero-visual { position: relative; display: flex; justify-content: center; }
.phone {
  position: relative;
  width: min(300px, 68vw);
  aspect-ratio: 9 / 18.6;
  border-radius: 42px;
  background: linear-gradient(160deg, #1a1e33, #0b0d1a);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 12px;
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  animation: float 6s ease-in-out infinite;
}
@keyframes float { 0%, 100% { transform: translateY(0) rotate(-1.5deg); } 50% { transform: translateY(-14px) rotate(-1.5deg); } }
.phone-notch {
  position: absolute;
  top: 12px; left: 50%;
  transform: translateX(-50%);
  width: 34%; height: 22px;
  background: #000;
  border-radius: 0 0 16px 16px;
  z-index: 3;
}
.phone-screen {
  width: 100%; height: 100%;
  border-radius: 32px;
  background: radial-gradient(120% 90% at 50% 0%, #0e1230 0%, #05060f 70%);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.led-strip {
  width: 88%;
  padding: 26px 0;
  background: #000;
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 0 30px rgba(255, 45, 120, 0.35), inset 0 0 20px rgba(0, 0, 0, 0.9);
}
.led-track {
  display: inline-flex;
  white-space: nowrap;
  font-family: var(--mono);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: 3px;
  color: #ff2d78;
  text-shadow: 0 0 8px rgba(255, 45, 120, 0.9), 0 0 24px rgba(255, 45, 120, 0.5);
  animation: marquee 9s linear infinite;
  will-change: transform;
}
.led-strip::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(0,0,0,0.85) 1.1px, transparent 1.6px);
  background-size: 3.4px 3.4px;
  pointer-events: none;
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.phone-glow {
  position: absolute;
  inset: 8% -14%;
  background: radial-gradient(ellipse at center, rgba(255, 45, 120, 0.16), transparent 65%);
  z-index: -1;
  filter: blur(20px);
}

/* ===== Sections ===== */
.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.section-head h2, .stats h2, .download h2 {
  font-size: clamp(26px, 3.2vw, 42px);
  font-weight: 700;
  letter-spacing: -0.4px;
  margin-bottom: 14px;
}
.section-head p { color: var(--text-dim); font-size: 16.5px; }

.features { padding: clamp(60px, 9vh, 120px) clamp(20px, 5vw, 64px); max-width: 1280px; margin: 0 auto; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .25s, border-color .25s, box-shadow .25s;
  backdrop-filter: blur(8px);
}
.card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(0, 229, 255, 0.12);
}
.card-icon {
  width: 46px; height: 46px;
  border-radius: 13px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.icon-cyan   { color: var(--cyan);   background: rgba(0, 229, 255, 0.1);  box-shadow: inset 0 0 0 1px rgba(0, 229, 255, 0.3); }
.icon-pink   { color: var(--pink);   background: rgba(255, 45, 120, 0.1); box-shadow: inset 0 0 0 1px rgba(255, 45, 120, 0.3); }
.icon-yellow { color: var(--yellow); background: rgba(255, 212, 0, 0.1);  box-shadow: inset 0 0 0 1px rgba(255, 212, 0, 0.3); }
.icon-violet { color: var(--violet); background: rgba(139, 92, 255, 0.1); box-shadow: inset 0 0 0 1px rgba(139, 92, 255, 0.3); }
.icon-green  { color: var(--green);  background: rgba(45, 255, 157, 0.1); box-shadow: inset 0 0 0 1px rgba(45, 255, 157, 0.3); }
.icon-orange { color: var(--orange); background: rgba(255, 138, 45, 0.1); box-shadow: inset 0 0 0 1px rgba(255, 138, 45, 0.3); }
.card h3 { font-size: 19px; margin-bottom: 10px; letter-spacing: -0.2px; }
.card p { color: var(--text-dim); font-size: 14.5px; }

/* Stats */
.stats { padding: clamp(50px, 8vh, 100px) clamp(20px, 5vw, 64px); text-align: center; }
.stats h2 { margin-bottom: 44px; }
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 980px;
  margin: 0 auto;
}
.stat {
  padding: 30px 12px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
}
.stat-num {
  display: block;
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 700;
  font-family: var(--mono);
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label { color: var(--text-dim); font-size: 14px; margin-top: 6px; display: inline-block; }

/* Download */
.download { padding: clamp(60px, 10vh, 130px) clamp(20px, 5vw, 64px); }
.download-inner {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  padding: clamp(44px, 6vw, 80px) clamp(24px, 5vw, 64px);
  border-radius: 28px;
  border: 1px solid rgba(139, 92, 255, 0.35);
  background:
    radial-gradient(90% 140% at 50% -20%, rgba(139, 92, 255, 0.22), transparent 60%),
    radial-gradient(80% 120% at 50% 120%, rgba(0, 229, 255, 0.16), transparent 60%),
    rgba(10, 13, 31, 0.7);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5), 0 0 60px rgba(139, 92, 255, 0.12);
}
.download p { color: var(--text-dim); margin: 6px 0 30px; font-size: 16.5px; }

/* Footer */
.footer {
  border-top: 1px solid var(--panel-border);
  padding: 54px clamp(20px, 5vw, 64px) 30px;
  background: rgba(5, 6, 15, 0.75);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto 40px;
}
.footer-brand p { color: var(--text-dim); font-size: 14px; margin-top: 14px; max-width: 300px; }
.footer-col h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--text-dim);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  color: var(--text);
  opacity: 0.82;
  text-decoration: none;
  font-size: 14.5px;
  margin-bottom: 10px;
  transition: opacity .2s, color .2s;
}
.footer-col a:hover { opacity: 1; color: var(--cyan); }
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 22px;
  border-top: 1px solid var(--panel-border);
  color: var(--text-dim);
  font-size: 13px;
}

/* ===== Gallery ===== */
.gallery {
  padding: clamp(50px, 8vh, 110px) 0 clamp(40px, 6vh, 80px);
  overflow: hidden;
}
.gallery .section-head { padding: 0 clamp(20px, 5vw, 64px); }

.gallery-viewport {
  position: relative;
  cursor: grab;
  -webkit-overflow-scrolling: touch;
}
.gallery-viewport.dragging { cursor: grabbing; }

.gallery-track {
  display: flex;
  gap: clamp(14px, 2vw, 24px);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 30px calc(50vw - 110px);
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.gallery-track::-webkit-scrollbar { display: none; }
.gallery-viewport.dragging .gallery-track { scroll-snap-type: none; }

.shot {
  flex: 0 0 auto;
  width: clamp(180px, 22vw, 240px);
  aspect-ratio: 9 / 16;
  border-radius: 22px;
  overflow: hidden;
  scroll-snap-align: center;
  border: 1px solid var(--panel-border);
  background: #0a0d1f;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  transform: scale(0.92);
  opacity: 0.55;
  transition: transform .28s cubic-bezier(.2, .8, .3, 1), opacity .28s, border-color .28s;
  will-change: transform;
  contain: layout paint;
}
.shot.is-active {
  transform: scale(1);
  opacity: 1;
  border-color: rgba(0, 229, 255, 0.45);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(0, 229, 255, 0.16);
}
.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: blur(10px) saturate(1.1);
  transform: scale(1.06);
  transition: filter .45s ease, transform .45s ease;
  user-select: none;
  -webkit-user-drag: none;
}
.shot img.hd { filter: none; transform: scale(1); }

.gallery-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  margin-top: 8px;
}
.gal-arrow {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: border-color .2s, background .2s, transform .2s;
}
.gal-arrow:hover { border-color: rgba(0, 229, 255, 0.5); background: rgba(0, 229, 255, 0.08); transform: scale(1.06); }
.gallery-dots { display: flex; gap: 8px; }
.gallery-dots button {
  width: 8px; height: 8px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  cursor: pointer;
  transition: width .3s, background .3s;
}
.gallery-dots button.active {
  width: 24px;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.6);
}
.gallery-hint {
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 0.6px;
  margin-top: 14px;
  opacity: 0.75;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(3, 4, 10, 0.9);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s;
}
.lightbox.open { opacity: 1; visibility: visible; }
.lightbox img {
  max-height: 86vh;
  max-width: min(92vw, 480px);
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.8), 0 0 60px rgba(0, 229, 255, 0.12);
  transform: scale(0.94);
  transition: transform .3s cubic-bezier(.2, .8, .3, 1);
}
.lightbox.open img { transform: scale(1); }
.lb-close, .lb-prev, .lb-next {
  position: absolute;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background .2s, border-color .2s;
}
.lb-close { top: 24px; inset-inline-end: 24px; width: 44px; height: 44px; font-size: 20px; }
.lb-prev, .lb-next { top: 50%; transform: translateY(-50%); width: 48px; height: 48px; }
.lb-prev { inset-inline-start: clamp(10px, 3vw, 40px); }
.lb-next { inset-inline-end: clamp(10px, 3vw, 40px); }
.lb-close:hover, .lb-prev:hover, .lb-next:hover { background: rgba(0, 229, 255, 0.12); border-color: rgba(0, 229, 255, 0.5); }
.lb-counter {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 1px;
}

/* ===== Legal pages ===== */
.legal-wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(44px, 7vh, 90px) clamp(20px, 5vw, 40px) clamp(60px, 8vh, 100px);
}
.legal-head { margin-bottom: 40px; }
.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 26px;
  transition: color .2s;
}
.legal-back:hover { color: var(--cyan); }
.legal-head h1 {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.5px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.legal-rev {
  display: inline-block;
  margin-top: 12px;
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--mono);
}
.legal-body { color: #c9cfe6; font-size: 15.5px; }
.legal-body h2 {
  color: var(--text);
  font-size: 21px;
  margin: 40px 0 12px;
  padding-top: 26px;
  border-top: 1px solid var(--panel-border);
}
.legal-body h3 { color: var(--text); font-size: 17px; margin: 28px 0 10px; }
.legal-body p { margin-bottom: 14px; }
.legal-body ul, .legal-body ol { margin: 0 0 16px 22px; }
[dir="rtl"] .legal-body ul, [dir="rtl"] .legal-body ol { margin: 0 22px 16px 0; }
.legal-body li { margin-bottom: 8px; }
.legal-body a { color: var(--cyan); word-break: break-all; }
.legal-body strong { color: var(--text); }
.legal-body .legal-note {
  border-inline-start: 3px solid var(--violet);
  background: rgba(139, 92, 255, 0.08);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 18px 0;
}

/* ===== RTL ===== */
[dir="rtl"] .led-track { animation-name: marquee-rtl; }
@keyframes marquee-rtl { from { transform: translateX(0); } to { transform: translateX(50%); } }

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero-copy { display: flex; flex-direction: column; align-items: center; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .nav-links { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding-top: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  .led-track, .phone, .pulse-dot { animation: none; }
  html { scroll-behavior: auto; }
}