/* ===== Keyuan Site Design System — APPLE LIGHT ===== */
:root {
  /* —— Apple-flavored core palette —— */
  --ink: #1d1d1f;            /* Apple's near-black for body text/headlines */
  --bg: #fbfbfd;             /* Apple's off-white page background */
  --bg-elevated: #ffffff;    /* cards / elevated surfaces */
  --rule: #d2d2d7;           /* Apple's subtle 1px border */
  --muted: #6e6e73;          /* Apple's secondary text gray */
  --accent: #0891B2;         /* single accent — cyan */

  /* —— Cyan family (kept for backward compat) —— */
  --cyan: #0891B2;
  --cyan-bright: #06B6D4;
  --cyan-soft: #CFFAFE;
  --cyan-dim: rgba(8, 145, 178, 0.08);
  --cyan-glow: rgba(8, 145, 178, 0.18);
  --teal: #0F766E;

  /* —— Orange retired: aliased to cyan so any leaked usage stays on-brand —— */
  --orange: var(--accent);
  --orange-soft: var(--cyan-soft);
  --orange-glow: var(--cyan-glow);

  /* —— Legacy (still referenced in old styles) —— */
  --obsidian: #050810;
  --graphite: #1a2235;
  --charcoal: #2a3449;
  --steel: #475569;
  --white: #FFFFFF;
  --bone: #F9FAFB;
  --cream: #FDF9F3;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-150: #EEF2F7;
  --gray-200: var(--rule);
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: var(--muted);
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: var(--ink);
  --gray-900: var(--ink);

  /* —— Layout & motion —— */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);   /* Apple ease-out */
  --max-w: 1360px;
  --pad-x: 48px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --tracking-display: -0.04em;
  --tracking-headline: -0.02em;
  --tracking-body: -0.005em;

  /* —— Typography (SF stack, no web display font) —— */
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;

  /* —— Shadows (soft, top-down, Apple style) —— */
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 8px 24px -8px rgba(0,0,0,.10);
  --shadow-lg: 0 30px 60px -20px rgba(0,0,0,.12);
  --shadow-soft: 0 30px 60px -20px rgba(0,0,0,.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
section[id] { scroll-margin-top: 90px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  letter-spacing: var(--tracking-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--pad-x); }
@media (max-width: 768px) {
  :root { --pad-x: 20px; }
}

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ===== NAV (always light) ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 12px var(--pad-x);
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(251, 251, 253, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.nav.scrolled {
  background: rgba(251, 251, 253, 0.92);
  border-bottom-color: var(--rule);
}
.nav-brand { display: flex; align-items: center; gap: 12px; color: var(--gray-800); }
.nav-brand-img { width: 40px; height: 40px; border-radius: 10px; object-fit: cover; }
.nav-brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav-brand-cn { font-weight: 800; font-size: 14px; letter-spacing: 1px; }
.nav-brand-en { font-size: 9px; letter-spacing: 2px; color: var(--gray-500); text-transform: uppercase; }

.nav-links { display: flex; gap: 32px; align-items: center; list-style: none; }
.nav-link {
  color: var(--gray-700); font-size: 13px; font-weight: 500;
  letter-spacing: 1px; transition: color .3s; position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--cyan); }
.nav-link::after {
  content: ''; position: absolute; bottom: -6px; left: 0; width: 0; height: 2px;
  background: var(--cyan); transition: width .3s var(--ease);
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-cta {
  background: none; border: 1px solid var(--gray-300);
  border-radius: 100px; padding: 8px 20px; color: var(--gray-700);
  cursor: pointer; font-size: 12px; letter-spacing: 1px; transition: all .3s;
}
.nav-cta:hover { border-color: var(--cyan); color: var(--cyan); background: var(--cyan-dim); }

.nav-mobile-toggle { display: none; background: none; border: none; color: var(--gray-800); font-size: 22px; cursor: pointer; }

@media (max-width: 900px) {
  .nav-links { display: none; position: absolute; top: 100%; right: 20px; flex-direction: column; background: var(--white); padding: 20px; border-radius: var(--radius); gap: 14px; min-width: 200px; box-shadow: var(--shadow-lg); border: 1px solid var(--gray-200); }
  .nav-links.open { display: flex; }
  .nav-mobile-toggle { display: block; }
}

/* ===== HERO (light, airy) ===== */
.hero {
  position: relative; min-height: 100vh;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  color: var(--gray-900);
  overflow: hidden;
  display: flex; align-items: flex-start;  /* top-align so title never hides */
  padding-top: 140px;  /* clear the fixed 70px nav + breathing room */
  padding-bottom: 80px;
}
.hero-content { padding-top: 20px; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 75% 35%, rgba(8, 145, 178, 0.10) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 15% 65%, rgba(14, 165, 233, 0.08) 0%, transparent 55%),
    radial-gradient(ellipse 40% 40% at 90% 90%, rgba(234, 88, 12, 0.06) 0%, transparent 50%);
}
.hero-flow { position: absolute; inset: 0; z-index: 0; overflow: hidden; opacity: .5; }
.hero-flow::before, .hero-flow::after {
  content: ''; position: absolute; border-radius: 50%;
  border: 1px solid rgba(8, 145, 178, 0.08);
}
.hero-flow::before { width: 600px; height: 600px; top: -200px; right: -100px; animation: heroFlow 30s linear infinite; }
.hero-flow::after { width: 800px; height: 800px; bottom: -300px; left: 10%; border-color: rgba(15, 118, 110, 0.06); animation: heroFlow 45s linear infinite reverse; }
@keyframes heroFlow { from { transform: rotate(0); } to { transform: rotate(360deg); } }
.hero-grid {
  position: absolute; inset: 0; z-index: 1; opacity: .5;
  background-image:
    linear-gradient(rgba(8, 145, 178, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 145, 178, 0.05) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, black, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black, transparent 70%);
}
.hero-orb { position: absolute; border-radius: 50%; filter: blur(100px); pointer-events: none; z-index: 0; }
.hero-orb-1 { width: 500px; height: 500px; top: 5%; right: 5%; background: rgba(8, 145, 178, 0.14); animation: heroOrbFloat 14s ease-in-out infinite; }
.hero-orb-2 { width: 350px; height: 350px; bottom: 15%; right: 25%; background: rgba(234, 88, 12, 0.08); animation: heroOrbFloat 20s ease-in-out infinite reverse; }
.hero-orb-3 { width: 320px; height: 320px; top: 55%; left: 60%; background: rgba(14, 165, 233, 0.06); animation: heroOrbFloat 17s ease-in-out infinite 3s; }
@keyframes heroOrbFloat {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(20px, -30px); }
  66% { transform: translate(-15px, 20px); }
}
.hero-content { position: relative; z-index: 2; padding: 0 var(--pad-x); max-width: 920px; }
.hero-tag {
  font-size: 11px; font-weight: 700; letter-spacing: 4px; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 28px;
  display: inline-flex; align-items: center; gap: 14px;
  background: var(--cyan-dim); padding: 8px 16px; border-radius: 100px;
  border: 1px solid rgba(8, 145, 178, 0.15);
}
.hero-tag::before { content: '●'; color: var(--cyan); font-size: 8px; animation: blink 2s ease-in-out infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 4.5vw, 64px);
  font-weight: 800; line-height: 1.1; margin-bottom: 24px;
  color: var(--gray-900);
}
.hero h1 .accent {
  color: var(--cyan); font-style: italic;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-desc {
  font-size: 16px; color: var(--gray-600);
  max-width: 580px; line-height: 1.9; margin-bottom: 44px; font-weight: 400;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-scroll {
  position: absolute; right: 48px; bottom: 80px; z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.hero-scroll-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--cyan); animation: heroScrollDot 2s ease-in-out infinite; }
.hero-scroll-line { width: 1px; height: 48px; background: linear-gradient(to bottom, var(--cyan), transparent); }
.hero-scroll-text { font-size: 9px; letter-spacing: 3px; color: var(--gray-500); writing-mode: vertical-rl; }
@keyframes heroScrollDot { 0%, 100% { opacity: 1; transform: translateY(0); } 50% { opacity: .3; transform: translateY(8px); } }
@media (max-width: 768px) { .hero-scroll { display: none; } }

/* ===== Hero mini stats ===== */
.hero-mini-stats {
  display: flex; align-items: center; gap: 28px;
  margin-top: 36px; padding-top: 24px;
  border-top: 1px solid var(--gray-200);
  max-width: 720px; flex-wrap: wrap;
}
.hero-mini-num {
  font-family: var(--font-display); font-size: 36px; font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1;
}
.hero-mini-num span { font-size: 22px; margin-left: 2px; }
.hero-mini-lbl { font-size: 11px; color: var(--gray-500); letter-spacing: 2px; text-transform: uppercase; margin-top: 6px; }
.hero-mini-sep { width: 1px; height: 40px; background: var(--gray-300); }
@media (max-width: 768px) { .hero-mini-sep { display: none; } .hero-mini-stats { gap: 20px; } }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 30px; border-radius: 100px;
  font-size: 13px; font-weight: 600; letter-spacing: 1.5px;
  text-transform: uppercase; cursor: pointer;
  transition: all .3s var(--ease); border: none; white-space: nowrap;
}
.btn-primary {
  background: var(--cyan); color: var(--white);
  box-shadow: 0 8px 20px var(--cyan-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px var(--cyan-glow); background: var(--cyan-bright); }
.btn-orange { background: var(--orange); color: var(--white); box-shadow: 0 8px 20px var(--orange-glow); }
.btn-orange:hover { transform: translateY(-2px); }
.btn-ghost {
  background: var(--white); color: var(--gray-700);
  border: 1px solid var(--gray-300); padding: 13px 30px;
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); background: var(--cyan-dim); }
.btn-outline-dark {
  background: var(--white); color: var(--gray-700);
  border: 1px solid var(--gray-300); padding: 13px 30px;
}
.btn-outline-dark:hover { border-color: var(--cyan); color: var(--cyan); }

/* ===== Sections ===== */
.sect { padding: 110px 0; position: relative; }
.sect-dark { background: var(--gray-50); color: var(--gray-900); }  /* "dark" now = tinted light */
.sect-light { background: var(--gray-50); }
.sect-white { background: var(--white); }

.sect-header { margin-bottom: 64px; }
.sect-tag {
  font-size: 11px; font-weight: 700; letter-spacing: 4px;
  text-transform: uppercase; color: var(--orange); margin-bottom: 16px;
  display: inline-flex; align-items: center; gap: 14px;
}
.sect-tag::before { content: ''; width: 32px; height: 1px; background: var(--orange); }
.sect-tag-center { justify-content: center; }
.sect-tag-center::before { display: none; }
.sect-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700; line-height: 1.15; margin-bottom: 16px;
  color: var(--gray-900);
}
.sect-desc { font-size: 16px; color: var(--gray-500); max-width: 640px; line-height: 1.8; }
.text-center { text-align: center; }
.text-center .sect-desc { margin: 0 auto; }

/* ===== Stats Strip ===== */
.stats-strip {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
  margin: 0 calc(var(--pad-x) * -1);
}
.stat-cell {
  padding: 48px 32px; text-align: center;
  border-right: 1px solid var(--gray-200);
  transition: all .3s;
}
.stat-cell:last-child { border-right: none; }
.stat-cell:hover { background: var(--cyan-dim); }
.stat-num {
  font-family: var(--font-display);
  font-size: 48px; font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1;
}
.stat-label { font-size: 11px; color: var(--gray-500); letter-spacing: 2px; text-transform: uppercase; margin-top: 12px; }
@media (max-width: 768px) { .stats-strip { grid-template-columns: repeat(2, 1fr); } }

/* ===== Product Grid ===== */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
  background: var(--white); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
  transition: all .4s var(--ease);
  border: 1px solid var(--gray-200);
  display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--cyan); }
.product-card-visual {
  background: linear-gradient(135deg, #FBFCFD, var(--gray-100));
  height: 280px; display: flex; align-items: center; justify-content: center;
  padding: 32px; position: relative; overflow: hidden;
}
.product-card-visual::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 30%, var(--cyan-dim), transparent 60%);
  opacity: 0; transition: opacity .4s;
}
.product-card:hover .product-card-visual::before { opacity: 1; }
.product-card-visual img { max-height: 85%; max-width: 85%; object-fit: contain; transition: transform .5s var(--ease); position: relative; z-index: 1; }
.product-card:hover .product-card-visual img { transform: scale(1.08); }
.product-card-info { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.product-card-tag {
  display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 2px;
  padding: 4px 10px; background: var(--cyan-soft); color: var(--cyan);
  border-radius: 4px; text-transform: uppercase; margin-bottom: 12px; width: fit-content;
}
.product-card-name { font-size: 19px; font-weight: 700; margin-bottom: 4px; color: var(--gray-900); }
.product-card-en { font-size: 11px; color: var(--gray-500); letter-spacing: 1px; margin-bottom: 12px; }
.product-card-app { font-size: 13px; color: var(--gray-600); margin-top: auto; padding-top: 12px; border-top: 1px solid var(--gray-200); }
@media (max-width: 900px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .product-grid { grid-template-columns: 1fr; } }

/* ===== Product Filter ===== */
.product-filter { display: flex; gap: 10px; margin-bottom: 40px; flex-wrap: wrap; justify-content: center; }
.product-filter-tab {
  padding: 10px 24px; border-radius: 100px;
  border: 1px solid var(--gray-300); background: var(--white);
  color: var(--gray-600); font-size: 13px; font-weight: 500;
  cursor: pointer; transition: all .3s;
}
.product-filter-tab.active, .product-filter-tab:hover {
  border-color: var(--cyan); background: var(--cyan); color: var(--white);
}

/* ========== Customer Marquee ========== */
.marquee-section { padding: 56px 0; background: var(--gray-50); border-top: 1px solid var(--gray-150); border-bottom: 1px solid var(--gray-150); }
.marquee-title { text-align: center; font-size: 12px; letter-spacing: 3px; color: var(--gray-500); text-transform: uppercase; font-weight: 600; margin-bottom: 32px; }
.marquee { overflow: hidden; width: 100%; mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; align-items: center; gap: 80px; animation: marqueeScroll 40s linear infinite; }
.marquee-track img { height: 50px; object-fit: contain; filter: grayscale(100%) opacity(.5); transition: filter .3s; flex-shrink: 0; }
.marquee-track img:hover { filter: grayscale(0) opacity(1); }
@keyframes marqueeScroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ========== Spotlight (3 big category cards, light) ========== */
.spotlight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.spotlight-card {
  background: var(--white); border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--gray-200);
  transition: all .4s var(--ease); position: relative;
  display: block;
}
.spotlight-card:hover { transform: translateY(-6px); box-shadow: 0 30px 60px rgba(15, 23, 42, 0.1); border-color: var(--cyan); }
.spotlight-visual {
  height: 280px;
  background: linear-gradient(135deg, #EFF8FB, var(--gray-100));
  display: flex; align-items: center; justify-content: center;
  padding: 40px; position: relative; overflow: hidden;
}
.spotlight-visual::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(8, 145, 178, 0.10), transparent 60%);
}
.spotlight-visual img { max-width: 85%; max-height: 85%; object-fit: contain; filter: drop-shadow(0 15px 30px rgba(15, 23, 42, 0.12)); transition: transform .6s var(--ease); position: relative; }
.spotlight-card:hover .spotlight-visual img { transform: scale(1.1) rotate(-5deg); }
.spotlight-chip {
  position: absolute; top: 20px; left: 20px;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--white); color: var(--cyan);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; box-shadow: var(--shadow);
}
.spotlight-body { padding: 32px; }
.spotlight-line { width: 40px; height: 3px; background: var(--cyan); margin-bottom: 18px; }
.spotlight-name { font-family: var(--font-display); font-size: 26px; font-weight: 700; margin-bottom: 12px; color: var(--gray-900); }
.spotlight-desc { color: var(--gray-500); font-size: 14px; line-height: 1.8; margin-bottom: 20px; min-height: 70px; }
.spotlight-cta { color: var(--cyan); font-size: 13px; font-weight: 600; letter-spacing: 1px; display: inline-flex; align-items: center; gap: 8px; transition: gap .3s; }
.spotlight-card:hover .spotlight-cta { gap: 14px; }
@media (max-width: 900px) { .spotlight-grid { grid-template-columns: 1fr; } }

/* ========== Company Intro Video ========== */
.intro-video-section {
  background: linear-gradient(135deg, var(--gray-50), #EFF8FB);
  position: relative; overflow: hidden;
}
.intro-video-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(8, 145, 178, 0.10), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(234, 88, 12, 0.06), transparent 50%);
}
.intro-video-wrap {
  display: grid; grid-template-columns: 1fr 1.3fr;
  gap: 60px; align-items: center; position: relative;
}
.intro-video-text .sect-title { margin-bottom: 20px; }
.intro-video-player {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  background: #000;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.2);
  border: 1px solid var(--gray-200);
  aspect-ratio: 16 / 9;
}
.intro-video-player video {
  width: 100%; height: 100%; display: block; object-fit: cover;
}
.intro-video-player::before {
  content: ''; position: absolute; inset: -2px;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  border-radius: var(--radius-lg);
  z-index: -1; opacity: .3; filter: blur(12px);
}
@media (max-width: 900px) {
  .intro-video-wrap { grid-template-columns: 1fr; gap: 32px; }
}

/* ========== Featured Showcase (light) ========== */
.showcase-section {
  background: var(--gray-50); color: var(--gray-900);
  position: relative; overflow: hidden;
}
.showcase-bg-orb {
  position: absolute; width: 800px; height: 800px; border-radius: 50%;
  background: radial-gradient(circle, rgba(8, 145, 178, 0.12), transparent 70%);
  top: -200px; right: -200px; filter: blur(80px);
}
.showcase-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; position: relative; }
.showcase-visual {
  display: block;
  aspect-ratio: 1; background: linear-gradient(135deg, var(--white), #EFF8FB);
  border-radius: var(--radius-lg); position: relative; overflow: hidden;
  padding: 60px; display: flex; align-items: center; justify-content: center;
  transition: all .3s; border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
}
.showcase-visual:hover { transform: scale(1.01); border-color: var(--cyan); box-shadow: 0 30px 60px rgba(8, 145, 178, 0.15); }
.showcase-visual::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at center, rgba(8, 145, 178, 0.08), transparent 60%);
}
.showcase-visual img { max-width: 85%; max-height: 85%; object-fit: contain; filter: drop-shadow(0 25px 40px rgba(15, 23, 42, 0.12)); position: relative; transition: transform .5s; animation: floaty 6s ease-in-out infinite; }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.showcase-tag { color: var(--orange); font-size: 11px; font-weight: 700; letter-spacing: 4px; text-transform: uppercase; margin-bottom: 20px; display: inline-flex; align-items: center; gap: 12px; }
.showcase-tag::before { content: ''; width: 30px; height: 1px; background: var(--orange); }
.showcase-title { font-family: var(--font-display); font-size: clamp(32px, 4vw, 52px); font-weight: 700; line-height: 1.1; margin-bottom: 16px; color: var(--gray-900); }
.showcase-sub { color: var(--cyan); font-size: 15px; margin-bottom: 20px; letter-spacing: .5px; }
.showcase-desc { color: var(--gray-600); font-size: 15px; line-height: 1.9; margin-bottom: 36px; }
.showcase-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 40px; padding: 24px 0; border-top: 1px solid var(--gray-200); border-bottom: 1px solid var(--gray-200); }
.showcase-stat-num { font-family: var(--font-display); font-size: 40px; font-weight: 700; background: linear-gradient(135deg, var(--cyan), var(--teal)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; }
.showcase-stat-num span { font-size: 24px; }
.showcase-stat-lbl { font-size: 11px; color: var(--gray-500); letter-spacing: 2px; text-transform: uppercase; margin-top: 6px; }
@media (max-width: 900px) { .showcase-grid { grid-template-columns: 1fr; gap: 40px; } .showcase-stats { grid-template-columns: 1fr 1fr; } }

/* ========== Compare (Air vs Liquid) ========== */
.compare-grid {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 40px;
  align-items: stretch; max-width: 1100px; margin: 0 auto;
}
.compare-col { background: var(--white); border-radius: var(--radius-lg); padding: 40px 32px; border: 2px solid var(--gray-200); }
.compare-liquid { border-color: var(--cyan); box-shadow: 0 20px 40px rgba(8, 145, 178, 0.15); position: relative; }
.compare-liquid::before { content: '👑 RECOMMENDED'; position: absolute; top: -14px; right: 20px; background: var(--cyan); color: var(--white); padding: 4px 12px; border-radius: 100px; font-size: 10px; font-weight: 700; letter-spacing: 1px; }
.compare-header { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 700; margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--gray-200); color: var(--gray-900); }
.compare-header i { font-size: 28px; }
.compare-air .compare-header i { color: var(--gray-500); }
.compare-liquid .compare-header i { color: var(--cyan); }
.compare-list { list-style: none; padding: 0; }
.compare-list li { padding: 12px 0; font-size: 14px; color: var(--gray-700); display: flex; align-items: center; gap: 12px; border-bottom: 1px dashed var(--gray-200); }
.compare-list li:last-child { border-bottom: none; }
.compare-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.compare-dot.bad { background: #EF4444; }
.compare-dot.good { background: #10B981; box-shadow: 0 0 8px rgba(16, 185, 129, 0.5); }
.compare-vs { display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 28px; font-weight: 800; color: var(--gray-400); font-style: italic; }
@media (max-width: 900px) { .compare-grid { grid-template-columns: 1fr; } .compare-vs { padding: 16px; } }

/* ========== Big Numbers (light) ========== */
.bignum-section {
  padding: 80px 0; background: linear-gradient(135deg, var(--white), var(--gray-50));
  position: relative; overflow: hidden;
  border-top: 1px solid var(--gray-200); border-bottom: 1px solid var(--gray-200);
}
.bignum-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(8, 145, 178, 0.05), transparent 60%);
}
.bignum-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; position: relative; }
.bignum { text-align: center; padding: 20px; }
.bignum-value {
  font-family: var(--font-display); font-size: clamp(56px, 7vw, 96px); font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1; letter-spacing: -2px;
}
.bignum-label { font-size: 12px; color: var(--gray-500); letter-spacing: 3px; text-transform: uppercase; margin-top: 12px; }
@media (max-width: 900px) { .bignum-grid { grid-template-columns: 1fr 1fr; } }

/* ========== Industries ========== */
.industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.industry-card {
  background: var(--white); border-radius: var(--radius);
  padding: 32px 28px; border: 1px solid var(--gray-200);
  transition: all .3s; display: flex; flex-direction: column; gap: 12px;
}
.industry-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--cyan); }
.industry-icon { font-size: 36px; }
.industry-name { font-family: var(--font-display); font-size: 20px; font-weight: 700; color: var(--gray-900); }
.industry-prod { font-size: 12px; color: var(--gray-500); letter-spacing: 1px; }
.industry-logos {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
  align-items: center; padding-top: 14px; margin-top: 6px;
  border-top: 1px dashed var(--gray-200);
}
.industry-logos img {
  max-height: 24px; max-width: 100%; object-fit: contain;
  filter: grayscale(100%) opacity(.55); transition: filter .3s;
}
.industry-card:hover .industry-logos img { filter: grayscale(0) opacity(1); }
@media (max-width: 900px) { .industry-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .industry-grid { grid-template-columns: 1fr; } }

/* ========== Featured Case Section (light with soft tint) ========== */
.featured-case-section { background: linear-gradient(135deg, var(--gray-50), #EFF8FB); color: var(--gray-900); }
.featured-case {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px;
  align-items: center;
}
.featured-case-tag { color: var(--orange); font-size: 11px; letter-spacing: 3px; text-transform: uppercase; font-weight: 700; margin-bottom: 24px; display: inline-block; }
.featured-case-logo { height: 60px; background: var(--white); padding: 10px 16px; border-radius: 8px; margin-bottom: 24px; display: block; border: 1px solid var(--gray-200); }
.featured-case-title { font-family: var(--font-display); font-size: clamp(28px, 3.5vw, 42px); font-weight: 700; line-height: 1.2; margin-bottom: 20px; color: var(--gray-900); }
.featured-case-summary { color: var(--gray-600); font-size: 16px; line-height: 1.9; margin-bottom: 32px; }
.featured-case-metrics { display: flex; gap: 32px; margin-bottom: 32px; padding: 24px 0; border-top: 1px solid var(--gray-300); border-bottom: 1px solid var(--gray-300); }
.featured-case-metric-val { font-family: var(--font-display); font-size: 32px; font-weight: 700; color: var(--cyan); line-height: 1; }
.featured-case-metric-lbl { font-size: 10px; color: var(--gray-500); letter-spacing: 2px; text-transform: uppercase; margin-top: 6px; }
.featured-case-visual {
  aspect-ratio: 1; position: relative;
  border-radius: var(--radius-lg); overflow: hidden;
  background: linear-gradient(135deg, var(--white), #EFF8FB);
  padding: 40px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
}
.featured-case-visual-bg {
  position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(8, 145, 178, 0.1), transparent 60%);
}
.featured-case-visual img {
  max-width: 85%; max-height: 85%; object-fit: contain;
  filter: drop-shadow(0 25px 40px rgba(15, 23, 42, 0.15));
  position: relative; animation: floaty 6s ease-in-out infinite;
}
@media (max-width: 900px) { .featured-case { grid-template-columns: 1fr; gap: 40px; } }

/* ========== Factory ========== */
.factory-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.factory-card {
  background: var(--white); padding: 32px 28px; border-radius: var(--radius);
  border: 1px solid var(--gray-200); text-align: left; transition: all .3s;
}
.factory-card:hover { border-color: var(--cyan); transform: translateY(-4px); box-shadow: var(--shadow); }
.factory-num { font-family: var(--font-display); font-size: 56px; font-weight: 800; background: linear-gradient(135deg, var(--cyan), var(--teal)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; margin-bottom: 10px; }
.factory-num span { font-size: 32px; }
.factory-name { font-size: 15px; font-weight: 700; color: var(--gray-900); margin-bottom: 10px; }
.factory-desc { font-size: 13px; color: var(--gray-500); line-height: 1.7; }
@media (max-width: 900px) { .factory-grid { grid-template-columns: 1fr 1fr; } }

/* ===== Case Cards ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.case-card {
  background: var(--white); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200); transition: all .4s var(--ease);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--cyan); }
.case-card-banner {
  background: linear-gradient(135deg, #EFF8FB, var(--gray-100));
  padding: 40px 32px; color: var(--gray-900); position: relative;
}
.case-card-banner::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at top right, rgba(8, 145, 178, 0.15), transparent 50%);
}
.case-logo {
  width: 120px; height: 60px; object-fit: contain;
  background: var(--white); padding: 10px; border-radius: 8px;
  margin-bottom: 20px; position: relative; z-index: 1;
  border: 1px solid var(--gray-200);
}
.case-industry { font-size: 10px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--cyan); margin-bottom: 8px; position: relative; }
.case-customer { font-family: var(--font-display); font-size: 22px; font-weight: 700; position: relative; color: var(--gray-900); }
.case-card-body { padding: 28px; }
.case-title { font-size: 17px; font-weight: 700; margin-bottom: 12px; line-height: 1.4; color: var(--gray-900); }
.case-summary { color: var(--gray-500); font-size: 14px; line-height: 1.7; }
.case-metrics { display: flex; gap: 20px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--gray-200); }
.case-metric { flex: 1; }
.case-metric-val { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: var(--cyan); }
.case-metric-lbl { font-size: 10px; color: var(--gray-500); letter-spacing: 1px; text-transform: uppercase; margin-top: 4px; }
@media (max-width: 900px) { .case-grid { grid-template-columns: 1fr; } }

/* ===== News Cards ===== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card {
  background: var(--white); border-radius: var(--radius);
  padding: 32px; border: 1px solid var(--gray-200);
  transition: all .3s;
  display: block;
}
.news-card:hover { box-shadow: var(--shadow); border-color: var(--cyan); transform: translateY(-2px); }
.news-date { font-size: 12px; color: var(--gray-500); letter-spacing: 1px; margin-bottom: 8px; }
.news-category {
  display: inline-block; font-size: 10px; font-weight: 700; letter-spacing: 2px;
  padding: 3px 10px; background: var(--orange); color: var(--white);
  border-radius: 4px; text-transform: uppercase; margin-bottom: 14px;
}
.news-title { font-size: 18px; font-weight: 700; margin-bottom: 12px; line-height: 1.4; color: var(--gray-900); }
.news-summary { color: var(--gray-500); font-size: 14px; line-height: 1.7; }
.news-read-more { color: var(--cyan); font-size: 13px; font-weight: 600; margin-top: 16px; display: inline-flex; align-items: center; gap: 6px; }
@media (max-width: 900px) { .news-grid { grid-template-columns: 1fr; } }

/* ===== Product Detail ===== */
.pd-layout { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; }
.pd-visual {
  background: linear-gradient(135deg, var(--white), #EFF8FB);
  border-radius: var(--radius-lg); padding: 60px;
  min-height: 500px; display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden; border: 1px solid var(--gray-200);
}
.pd-visual img { max-width: 90%; max-height: 90%; object-fit: contain; filter: drop-shadow(0 20px 40px rgba(15, 23, 42, 0.12)); }
.pd-tag {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 3px;
  padding: 6px 14px; background: var(--cyan-soft); color: var(--cyan);
  border-radius: 4px; text-transform: uppercase; margin-bottom: 20px;
}
.pd-title { font-family: var(--font-display); font-size: 42px; font-weight: 700; margin-bottom: 8px; color: var(--gray-900); }
.pd-subtitle { font-size: 15px; color: var(--gray-500); letter-spacing: 1px; margin-bottom: 28px; }
.pd-desc { font-size: 16px; color: var(--gray-600); line-height: 1.9; margin-bottom: 40px; }
.pd-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--gray-200); border: 1px solid var(--gray-200); margin-bottom: 32px; border-radius: 10px; overflow: hidden; }
.pd-spec { background: var(--white); padding: 18px 22px; }
.pd-spec-lbl { font-size: 11px; color: var(--gray-500); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 6px; }
.pd-spec-val { font-size: 17px; font-weight: 600; color: var(--gray-800); }
@media (max-width: 900px) { .pd-layout { grid-template-columns: 1fr; } .pd-visual { min-height: 360px; } }

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 60px; }
.contact-info-item { display: flex; gap: 18px; margin-bottom: 28px; align-items: flex-start; }
.contact-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--cyan), var(--teal));
  color: var(--white); display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
}
.contact-info-label { font-size: 12px; color: var(--gray-500); letter-spacing: 1px; margin-bottom: 4px; text-transform: uppercase; }
.contact-info-val { font-size: 16px; font-weight: 500; color: var(--gray-800); }
.contact-info-val a { color: var(--gray-800); }
.contact-info-val a:hover { color: var(--cyan); }

.contact-form {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 40px; border: 1px solid var(--gray-200); box-shadow: var(--shadow);
}
.form-group { margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--gray-700); margin-bottom: 8px; }
.form-input, .form-textarea, .form-select {
  width: 100%; padding: 14px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--gray-300); background: var(--white);
  font-size: 15px; color: var(--gray-800); transition: all .2s;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px var(--cyan-dim);
}
.form-textarea { resize: vertical; min-height: 120px; }
.form-msg { padding: 14px 18px; border-radius: var(--radius-sm); margin-bottom: 20px; font-size: 14px; }
.form-msg.success { background: var(--cyan-dim); color: var(--cyan); border: 1px solid rgba(8, 145, 178, 0.2); }
.form-msg.error { background: #FEF2F2; color: #B91C1C; border: 1px solid #FECACA; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } .form-row { grid-template-columns: 1fr; } }

/* ===== Footer (light) ===== */
.footer { background: var(--gray-50); color: var(--gray-700); padding: 80px var(--pad-x) 32px; border-top: 1px solid var(--gray-200); }
.footer-main { max-width: var(--max-w); margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 60px; margin-bottom: 48px; }
.footer-brand { font-family: var(--font-display); font-size: 22px; font-weight: 700; margin-bottom: 16px; color: var(--gray-900); }
.footer-tagline { color: var(--gray-500); font-size: 14px; line-height: 1.8; max-width: 320px; }
.footer-col h4 { font-size: 12px; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 20px; color: var(--gray-900); font-weight: 700; }
.footer-col a { display: block; color: var(--gray-500); font-size: 14px; padding: 6px 0; transition: color .2s; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  max-width: var(--max-w); margin: 0 auto;
  padding-top: 28px; border-top: 1px solid var(--gray-200);
  display: flex; justify-content: space-between; align-items: center;
  color: var(--gray-400); font-size: 13px;
}
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--gray-500); font-size: 13px; }
.footer-links a:hover { color: var(--gray-900); }
@media (max-width: 900px) { .footer-main { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-main { grid-template-columns: 1fr; gap: 32px; } .footer-bottom { flex-direction: column; gap: 16px; } }

/* ===== Reveal animations (Apple ease-out, calm) ===== */
.reveal {
  opacity: 0; transform: translateY(12px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== Utilities ===== */
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: 32px; }

/* ===== Page hero (inner pages, light) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--gray-50), #EFF8FB);
  color: var(--gray-900); padding: 160px 0 80px; position: relative; overflow: hidden;
  border-bottom: 1px solid var(--gray-200);
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at top right, rgba(8, 145, 178, 0.1), transparent 60%);
  pointer-events: none;
}
.page-hero-title { font-family: var(--font-display); font-size: clamp(36px, 4.5vw, 60px); font-weight: 700; margin-bottom: 16px; position: relative; color: var(--gray-900); }
.page-hero-sub { font-size: 16px; color: var(--gray-600); max-width: 640px; line-height: 1.8; position: relative; }

/* ===== Solutions (icons) ===== */
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.solution { background: var(--white); border-radius: var(--radius-lg); padding: 40px 32px; border: 1px solid var(--gray-200); transition: all .3s; }
.solution:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--cyan); }
.solution-icon {
  width: 60px; height: 60px; border-radius: 16px;
  background: var(--cyan-dim); color: var(--cyan);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; margin-bottom: 24px;
}
.solution-name { font-family: var(--font-display); font-size: 24px; font-weight: 700; margin-bottom: 12px; color: var(--gray-900); }
.solution-desc { color: var(--gray-500); font-size: 14px; line-height: 1.8; margin-bottom: 16px; }
.solution-list { list-style: none; padding-left: 0; }
.solution-list li { padding: 6px 0; font-size: 14px; color: var(--gray-600); padding-left: 20px; position: relative; }
.solution-list li::before { content: '✓'; position: absolute; left: 0; color: var(--cyan); font-weight: 700; }
.solution-partners { margin-top: 24px; padding-top: 20px; border-top: 1px dashed var(--gray-200); }
.solution-partners small { font-size: 10px; letter-spacing: 2px; text-transform: uppercase; color: var(--gray-500); font-weight: 600; display: block; margin-bottom: 14px; }
.solution-partners-logos { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; align-items: center; }
.solution-partners-logos img { max-height: 32px; max-width: 100%; object-fit: contain; filter: grayscale(100%) opacity(.6); transition: filter .3s; }
.solution-partners-logos img:hover { filter: grayscale(0) opacity(1); }
@media (max-width: 900px) { .solution-grid { grid-template-columns: 1fr; } }

/* ===== About ===== */
.about-story {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-story-text .highlight { font-family: var(--font-display); font-size: 28px; font-weight: 700; margin-bottom: 20px; line-height: 1.4; color: var(--gray-900); }
.about-story p { margin-bottom: 16px; color: var(--gray-600); line-height: 1.9; }
.about-timeline { padding-left: 40px; position: relative; }
.about-timeline::before { content: ''; position: absolute; left: 10px; top: 0; bottom: 0; width: 2px; background: var(--gray-200); }
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item::before { content: ''; position: absolute; left: -37px; top: 5px; width: 16px; height: 16px; border-radius: 50%; background: var(--white); border: 3px solid var(--cyan); }
.timeline-year { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: var(--cyan); }
.timeline-desc { color: var(--gray-600); font-size: 14px; margin-top: 4px; }
@media (max-width: 900px) { .about-story { grid-template-columns: 1fr; } }

.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.cert { background: var(--white); border-radius: var(--radius); padding: 24px; border: 1px solid var(--gray-200); text-align: center; }
.cert-icon { font-size: 36px; margin-bottom: 10px; }
.cert-name { font-weight: 700; font-size: 14px; margin-bottom: 4px; color: var(--gray-900); }
.cert-desc { font-size: 12px; color: var(--gray-500); }
@media (max-width: 768px) { .cert-grid { grid-template-columns: repeat(2, 1fr); } }

/* ===== CTA Banner (light variation) ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--white), #EFF8FB);
  border: 1px solid var(--cyan);
  border-radius: var(--radius-lg); padding: 60px;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--gray-900); margin: 80px 0; position: relative; overflow: hidden;
  box-shadow: 0 20px 60px rgba(8, 145, 178, 0.12);
}
.cta-banner::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at bottom right, rgba(8, 145, 178, 0.1), transparent 50%);
  pointer-events: none;
}
.cta-banner-text { position: relative; }
.cta-banner h3 { font-family: var(--font-display); font-size: 32px; font-weight: 700; margin-bottom: 10px; color: var(--gray-900); }
.cta-banner p { color: var(--gray-600); font-size: 15px; }
.cta-banner-action { position: relative; }
@media (max-width: 768px) {
  .cta-banner { flex-direction: column; gap: 24px; text-align: center; padding: 40px; }
}

/* ===== Detail news / case body ===== */
.detail-body { max-width: 800px; margin: 0 auto; padding: 0 var(--pad-x); }
.detail-body p { font-size: 16px; line-height: 1.9; margin-bottom: 20px; color: var(--gray-700); }
.detail-meta { font-size: 12px; color: var(--gray-500); letter-spacing: 1px; margin-bottom: 16px; }


/* ════════════════════════════════════════════════════════════════
   Apple-style Chapter System — mobile-first, video-ready
   used by: home.html (and any page adopting .chapter-* classes)
   ════════════════════════════════════════════════════════════════ */

:root {
  --ch-pad-y: clamp(72px, 12vw, 160px);
  --ch-pad-x: clamp(22px, 6vw, 80px);
  --ch-gap: clamp(32px, 6vw, 72px);
  --ch-display-xl: clamp(40px, 9vw, 96px);
  --ch-display-lg: clamp(32px, 6.5vw, 72px);
  --ch-display-md: clamp(24px, 4.5vw, 44px);
  --ch-body-lg: clamp(17px, 2.2vw, 24px);
  --ch-body: 17px;
  --ch-eyebrow: clamp(12px, 1.4vw, 14px);
  --ch-radius: clamp(14px, 2vw, 28px);
}

.chapter {
  position: relative;
  padding: var(--ch-pad-y) var(--ch-pad-x);
  overflow: hidden;
}
.chapter-inner { max-width: 1100px; margin: 0 auto; }
.chapter--narrow .chapter-inner { max-width: 880px; }

.chapter-eyebrow {
  font-size: var(--ch-eyebrow);
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.chapter-headline {
  font-family: var(--font-display);
  font-size: var(--ch-display-lg);
  font-weight: 600;                         /* Apple uses 600, not 700/800 */
  letter-spacing: var(--tracking-display);  /* tight tracking for display */
  line-height: 1.07;
  color: var(--ink);
}
:lang(zh) .chapter-headline { letter-spacing: -0.01em; }   /* Chinese needs looser */
.chapter-kicker {
  font-family: var(--font-body);
  font-size: var(--ch-body-lg);
  line-height: 1.4;
  color: var(--muted);
  margin-top: 20px;
  max-width: 720px;
  font-weight: 400;
  letter-spacing: var(--tracking-body);
}
.chapter-center { text-align: center; }
.chapter-center .chapter-kicker { margin-left: auto; margin-right: auto; }
.chapter-center .chapter-ctas { justify-content: center; }

.chapter-dark { background: #0A0F1E; color: #E2E8F0; }
.chapter-dark .chapter-headline { color: #fff; }
.chapter-dark .chapter-kicker { color: rgba(255,255,255,.72); }
.chapter-dark .chapter-eyebrow { color: #5EEAD4; }

.chapter-grey { background: #F5F5F7; }

/* hero chapter — full phone viewport */
.chapter-hero {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-items: center;
  justify-items: center;
  text-align: center;
  color: #fff;
  background: #000;
  padding-top: max(var(--ch-pad-y), 120px);
  padding-bottom: var(--ch-pad-y);
}
.chapter-hero-media {
  position: absolute; inset: 0;
  overflow: hidden;
  z-index: 0;
}
.chapter-hero-media video,
.chapter-hero-media img,
.chapter-hero-media canvas {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
}
.chapter-hero-media canvas {
  position: absolute; inset: 0;
  pointer-events: none;
}
/* Light-blue scrim — soft sky wash on top, gentler bottom
   so the pastel plasma stays luminous while the headline reads. */
.chapter-hero-scrim {
  position: absolute; inset: 0; z-index: 1;
  background:
    radial-gradient(ellipse at top right, rgba(125, 211, 252, .22), transparent 55%),
    linear-gradient(180deg, rgba(30, 58, 138, .02) 0%, rgba(30, 58, 138, .22) 55%, rgba(30, 58, 138, .48) 100%);
  pointer-events: none;
}
.chapter-hero .chapter-inner { position: relative; z-index: 2; max-width: 920px; }
.chapter-hero .chapter-headline { font-size: var(--ch-display-xl); color: #fff; }
.chapter-hero .chapter-kicker { color: rgba(255,255,255,.88); margin-left: auto; margin-right: auto; }
.chapter-hero .chapter-eyebrow { color: #5EEAD4; }

/* Video slot — drop an mp4 in static/video/ and reference it */
.chapter-video {
  position: relative;
  margin-top: clamp(32px, 5vw, 56px);
  border-radius: var(--ch-radius);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #0F172A, #1E293B);
  box-shadow: 0 30px 60px -20px rgba(15,23,42,.3);
}
.chapter-video video {
  width: 100%; height: 100%; object-fit: cover;
  display: block;
}
.chapter-video--portrait { aspect-ratio: 4 / 5; max-width: 520px; margin-left: auto; margin-right: auto; }

.chapter-video-placeholder {
  position: absolute; inset: 0;
  display: grid; place-content: center; gap: 8px;
  color: rgba(255,255,255,.78);
  text-align: center;
  padding: 20px;
}
.chapter-video-placeholder i {
  font-size: clamp(32px, 5vw, 56px);
  color: rgba(94,234,212,.7);
}
.chapter-video-placeholder .ph-title {
  font-size: 15px; font-weight: 600; letter-spacing: -.01em;
}
.chapter-video-placeholder .ph-file {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 12px;
  padding: 4px 10px;
  background: rgba(255,255,255,.08);
  border-radius: 6px;
  color: rgba(255,255,255,.55);
  display: inline-block;
  margin-top: 6px;
}

/* Call-to-action row */
.chapter-ctas {
  display: flex; flex-wrap: wrap; gap: 14px 22px;
  margin-top: 28px; align-items: center;
}
.chapter-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px;
  background: var(--cyan);
  color: #fff !important;
  font-size: 16px; font-weight: 500; letter-spacing: -.01em;
  transition: all .25s var(--ease);
}
.chapter-pill:hover { background: var(--cyan-bright); transform: translateY(-1px); }
.chapter-pill-ghost {
  background: transparent;
  color: var(--gray-900) !important;
  border: 1.5px solid currentColor;
}
.chapter-dark .chapter-pill-ghost { color: #fff !important; }
.chapter-link {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--cyan);
  font-size: 17px; font-weight: 500; letter-spacing: -.01em;
}
.chapter-dark .chapter-link { color: #5EEAD4; }
.chapter-link:hover i { transform: translateX(3px); }
.chapter-link i { transition: transform .25s var(--ease); }

/* Customer logo cloud — clean grid, no marquee */
.chapter-logos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px 20px;
  margin-top: 56px;
  align-items: center;
  justify-items: center;
}
@media (min-width: 744px) {
  .chapter-logos { grid-template-columns: repeat(5, 1fr); gap: 48px 32px; }
}
@media (min-width: 1068px) {
  .chapter-logos { grid-template-columns: repeat(9, 1fr); }
}
.chapter-logos img {
  max-height: 38px; width: auto;
  opacity: .65;
  filter: grayscale(100%);
  transition: all .3s var(--ease);
}
.chapter-logos img:hover { opacity: 1; filter: none; }

/* Big numbers */
.chapter-stats {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 44px 20px;
  margin-top: clamp(48px, 8vw, 88px);
}
@media (min-width: 744px) { .chapter-stats { grid-template-columns: repeat(4, 1fr); } }
.chapter-stat { text-align: center; }
.chapter-stat-num {
  font-size: clamp(44px, 8vw, 88px);
  font-weight: 700;
  letter-spacing: -.04em;
  line-height: 1;
  color: var(--cyan);
}
.chapter-dark .chapter-stat-num {
  background: linear-gradient(135deg, #5EEAD4 0%, #67E8F9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.chapter-stat-lbl {
  margin-top: 14px;
  font-size: 14px;
  color: var(--gray-500);
  font-weight: 500;
  letter-spacing: .02em;
}
.chapter-dark .chapter-stat-lbl { color: rgba(255,255,255,.55); }

/* Application cards — big, tappable, one column on phone */
.chapter-apps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(40px, 6vw, 64px);
}
@media (min-width: 744px) { .chapter-apps { grid-template-columns: 1fr 1fr; gap: 20px; } }
@media (min-width: 1068px) { .chapter-apps { grid-template-columns: repeat(3, 1fr); gap: 22px; } }
.chapter-app {
  position: relative;
  border-radius: var(--ch-radius);
  overflow: hidden;
  background: #1a2235;
  aspect-ratio: 4 / 5;
  display: flex; align-items: flex-end;
  color: #fff;
  text-decoration: none;
  isolation: isolate;
}
@media (min-width: 744px) { .chapter-app { aspect-ratio: 3 / 4; } }
.chapter-app-media {
  position: absolute; inset: 0; z-index: 0;
  width: 100%; height: 100%; object-fit: cover;
}
.chapter-app-scrim {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(0,0,0,0) 35%, rgba(0,0,0,.85));
}
.chapter-app-body {
  position: relative; z-index: 2;
  padding: clamp(24px, 4vw, 36px);
}
.chapter-app-tag {
  font-size: 12px; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase;
  color: #5EEAD4;
  margin-bottom: 10px;
}
.chapter-app-name {
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.15;
}
.chapter-app-sub {
  margin-top: 6px;
  font-size: 14px;
  color: rgba(255,255,255,.72);
  line-height: 1.4;
}
.chapter-app:hover .chapter-app-media { transform: scale(1.04); }
.chapter-app-media { transition: transform .6s var(--ease); }

/* Showcase — sticky text, visual on side (desktop) / stacked (mobile) */
.chapter-showcase {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}
@media (min-width: 1068px) {
  .chapter-showcase { grid-template-columns: 1fr 1.05fr; gap: 80px; align-items: center; }
  .chapter-showcase-text { position: sticky; top: 110px; }
}
.chapter-showcase-visual {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--ch-radius);
  overflow: hidden;
  background: linear-gradient(160deg, #DBEAFE, #F0F9FF);
  display: grid; place-items: center;
}
.chapter-showcase-visual img,
.chapter-showcase-visual video {
  width: 100%; height: 100%; object-fit: cover;
}
.chapter-showcase-visual .pad {
  width: 70%; height: auto; object-fit: contain;
}
.chapter-showcase-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px; margin-top: 36px;
}
.chapter-showcase-metrics .m-num {
  font-size: clamp(28px, 4.2vw, 44px);
  font-weight: 700; color: var(--cyan);
  letter-spacing: -.03em; line-height: 1;
}
.chapter-showcase-metrics .m-lbl {
  font-size: 12px; color: var(--gray-500);
  margin-top: 6px; letter-spacing: .02em;
}

/* Feature row alt (text+video stacked on mobile, side-by-side desktop) */
.chapter-feature {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}
@media (min-width: 1068px) {
  .chapter-feature { grid-template-columns: 1fr 1fr; gap: 80px; }
  .chapter-feature-reverse { direction: rtl; }
  .chapter-feature-reverse > * { direction: ltr; }
}
.chapter-feature .chapter-video { margin-top: 0; }

/* Compare cards — stacked on mobile */
.chapter-compare {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(40px, 6vw, 64px);
}
@media (min-width: 744px) {
  .chapter-compare { grid-template-columns: 1fr 1fr; gap: 20px; }
}
.chapter-compare-card {
  padding: clamp(28px, 4vw, 44px);
  border-radius: var(--ch-radius);
  background: #fff;
  border: 1px solid var(--gray-200);
}
.chapter-compare-card.bad { background: var(--gray-50); }
.chapter-compare-card.good {
  background: linear-gradient(160deg, #ECFEFF, #FFF);
  border-color: var(--cyan-soft);
}
.chapter-compare-hd {
  display: flex; align-items: center; gap: 12px;
  font-size: 18px; font-weight: 600;
  margin-bottom: 22px;
  color: var(--gray-900);
}
.chapter-compare-card.good .chapter-compare-hd { color: var(--cyan); }
.chapter-compare-hd i { font-size: 24px; }
.chapter-compare-card ul {
  list-style: none; padding: 0;
  display: grid; gap: 12px;
}
.chapter-compare-card li {
  display: flex; gap: 10px;
  font-size: 15px; line-height: 1.45;
  color: var(--gray-700);
}
.chapter-compare-card li::before {
  content: '—';
  color: var(--gray-400);
  flex-shrink: 0;
}
.chapter-compare-card.good li::before {
  content: '✓'; color: var(--cyan);
  font-weight: 700;
}

/* Final CTA chapter */
.chapter-cta-final {
  text-align: center;
  padding: clamp(80px, 12vw, 140px) var(--ch-pad-x);
}
.chapter-cta-final .chapter-headline { max-width: 880px; margin: 0 auto; }
.chapter-cta-final .chapter-ctas { justify-content: center; margin-top: 40px; }

/* Reveal refinement for new chapters */
.chapter.reveal,
.chapter .reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.chapter.reveal.visible,
.chapter .reveal.visible { opacity: 1; transform: none; }

/* Nav — tighter on mobile, bigger tap targets */
@media (max-width: 743px) {
  .nav { padding: 10px 18px; }
  .nav-brand-text { display: none; }
  .nav-brand-img { width: 34px; height: 34px; }
  .nav-mobile-toggle { font-size: 26px; padding: 8px; }
  .nav-links {
    right: 12px !important; top: calc(100% + 8px) !important;
    min-width: 200px !important;
    gap: 18px !important;
    padding: 22px !important;
  }
  .nav-link, .nav-cta { font-size: 16px; padding: 6px 2px; }
}

/* Prevent horizontal jank on phones */
@media (max-width: 1067px) {
  body { font-size: 16px; }
}

/* ════════════════════════════════════════════════════════════════
   Apple polish for EXISTING pages (contact, about, products …)
   ════════════════════════════════════════════════════════════════ */

/* Page hero — upgrade to Apple-style big type */
.page-hero {
  background: #0A0F1E !important;
  position: relative;
  padding: clamp(130px, 18vw, 220px) var(--ch-pad-x) clamp(70px, 10vw, 120px) !important;
  text-align: center;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at top, rgba(8,145,178,.25), transparent 55%),
    radial-gradient(ellipse at bottom right, rgba(94,234,212,.12), transparent 55%);
  pointer-events: none;
}
.page-hero .container { position: relative; }
.page-hero-title {
  font-family: var(--font-body) !important;
  font-size: var(--ch-display-lg) !important;
  font-weight: 700 !important;
  letter-spacing: -.035em !important;
  line-height: 1.05 !important;
  color: #fff !important;
  margin-bottom: 20px !important;
}
.page-hero-sub {
  font-size: var(--ch-body-lg) !important;
  color: rgba(255,255,255,.78) !important;
  max-width: 720px;
  margin: 0 auto !important;
  line-height: 1.4 !important;
  letter-spacing: -.005em !important;
}

/* Section padding — fluid & mobile-first */
.sect {
  padding: var(--ch-pad-y) var(--ch-pad-x) !important;
}
.sect .container { padding: 0 !important; }

/* Section headers */
.sect-title {
  font-family: var(--font-body) !important;
  font-size: var(--ch-display-md) !important;
  font-weight: 700 !important;
  letter-spacing: -.03em !important;
  line-height: 1.1 !important;
  color: var(--gray-900);
}
.sect-desc {
  font-size: var(--ch-body-lg) !important;
  line-height: 1.4 !important;
  color: var(--gray-600) !important;
  max-width: 720px;
}
.sect-tag {
  font-size: var(--ch-eyebrow) !important;
  letter-spacing: .14em !important;
  text-transform: uppercase;
  color: var(--cyan) !important;
  font-weight: 600 !important;
}

/* Product grid — mobile-first with fluid gap */
.product-grid {
  grid-template-columns: 1fr !important;
  gap: 14px !important;
}
@media (min-width: 560px) {
  .product-grid { grid-template-columns: 1fr 1fr !important; gap: 18px !important; }
}
@media (min-width: 900px) {
  .product-grid { grid-template-columns: repeat(3, 1fr) !important; gap: 22px !important; }
}
.product-card {
  border-radius: var(--ch-radius) !important;
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.product-card:hover { transform: translateY(-4px); }
.product-card-visual {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

/* Product filter — tap-friendly on phones */
.product-filter {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-bottom: clamp(32px, 5vw, 48px);
  justify-content: center;
}
.product-filter-tab {
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 15px; font-weight: 500;
  background: var(--gray-100);
  color: var(--gray-700);
  transition: all .25s var(--ease);
  border: 1.5px solid transparent;
}
.product-filter-tab.active,
.product-filter-tab:hover {
  background: var(--gray-900);
  color: #fff;
}

/* Cases / news grids — mobile-first */
.case-grid, .news-grid {
  grid-template-columns: 1fr !important;
  gap: 18px !important;
}
@media (min-width: 744px) {
  .case-grid, .news-grid { grid-template-columns: 1fr 1fr !important; gap: 22px !important; }
}
.case-card, .news-card {
  border-radius: var(--ch-radius) !important;
  overflow: hidden;
}
.news-card {
  padding: clamp(24px, 4vw, 36px) !important;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.news-card:hover { transform: translateY(-4px); }

/* Solutions grid — already has it but polish */
.solution-grid {
  grid-template-columns: 1fr !important;
  gap: 18px !important;
}
@media (min-width: 744px) { .solution-grid { grid-template-columns: 1fr 1fr !important; gap: 22px !important; } }
@media (min-width: 1068px) { .solution-grid { grid-template-columns: repeat(3, 1fr) !important; } }
.solution {
  padding: clamp(28px, 4vw, 44px) !important;
  border-radius: var(--ch-radius) !important;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.solution:hover { transform: translateY(-4px); }
.solution-icon { font-size: clamp(28px, 4vw, 40px) !important; margin-bottom: 18px !important; }
.solution-name { font-size: 22px !important; font-weight: 600 !important; letter-spacing: -.02em !important; margin-bottom: 10px !important; }
.solution-desc { font-size: 15px !important; line-height: 1.5 !important; color: var(--gray-600) !important; margin-bottom: 16px !important; }
.solution-list li { font-size: 14px !important; padding: 6px 0 6px 22px !important; }

/* About timeline & story — stack on mobile */
.about-story {
  grid-template-columns: 1fr !important;
  gap: clamp(32px, 5vw, 56px) !important;
}
@media (min-width: 1068px) { .about-story { grid-template-columns: 1fr 1fr !important; gap: 80px !important; } }
.about-story .highlight {
  font-size: var(--ch-display-md) !important;
  font-weight: 700 !important;
  letter-spacing: -.03em !important;
  line-height: 1.15 !important;
  color: var(--gray-900) !important;
  margin-bottom: 24px !important;
}
.about-story p { font-size: 17px !important; line-height: 1.65 !important; color: var(--gray-700) !important; }

/* Cert grid */
.cert-grid {
  grid-template-columns: 1fr 1fr !important;
  gap: 14px !important;
}
@media (min-width: 744px) { .cert-grid { grid-template-columns: repeat(4, 1fr) !important; gap: 22px !important; } }
.cert {
  padding: clamp(24px, 4vw, 36px) !important;
  border-radius: var(--ch-radius) !important;
  text-align: center;
}
.cert-icon { font-size: 32px !important; margin-bottom: 12px !important; }

/* CTA banner — more Apple */
.cta-banner {
  padding: clamp(44px, 7vw, 72px) !important;
  border-radius: var(--ch-radius) !important;
  background: linear-gradient(160deg, #ECFEFF, #FFF) !important;
  border: 1px solid var(--cyan-soft) !important;
  box-shadow: 0 20px 60px -20px rgba(8,145,178,.15) !important;
}
.cta-banner h3 {
  font-family: var(--font-body) !important;
  font-size: clamp(24px, 3.8vw, 36px) !important;
  font-weight: 700 !important;
  letter-spacing: -.025em !important;
  line-height: 1.15 !important;
}
@media (max-width: 743px) {
  .cta-banner {
    flex-direction: column !important;
    text-align: center !important;
    gap: 24px !important;
  }
}

/* Buttons — pill, bigger tap */
.btn {
  border-radius: 999px !important;
  padding: 13px 26px !important;
  font-size: 16px !important;
  font-weight: 500 !important;
  letter-spacing: -.01em !important;
  transition: all .25s var(--ease) !important;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary { background: var(--cyan) !important; color: #fff !important; }
.btn-primary:hover { background: var(--cyan-bright) !important; transform: translateY(-1px); }
.btn-orange { background: var(--orange) !important; color: #fff !important; }
.btn-orange:hover { background: #F97316 !important; transform: translateY(-1px); }
.btn-ghost { background: transparent !important; color: inherit !important; border: 1.5px solid currentColor !important; }
.btn-outline-dark { background: transparent !important; color: var(--gray-900) !important; border: 1.5px solid var(--gray-900) !important; }
.btn-outline-dark:hover { background: var(--gray-900) !important; color: #fff !important; }

/* Product detail — mobile */
.pd-layout {
  grid-template-columns: 1fr !important;
  gap: clamp(28px, 4vw, 48px) !important;
}
@media (min-width: 1068px) { .pd-layout { grid-template-columns: 1fr 1fr !important; gap: 80px !important; align-items: center; } }
.pd-visual {
  aspect-ratio: 4 / 3;
  border-radius: var(--ch-radius) !important;
  background: var(--gray-50) !important;
  min-height: auto !important;
}
.pd-title {
  font-family: var(--font-body) !important;
  font-size: var(--ch-display-md) !important;
  font-weight: 700 !important;
  letter-spacing: -.03em !important;
  line-height: 1.1 !important;
}
.pd-desc { font-size: 17px !important; line-height: 1.6 !important; color: var(--gray-600) !important; }

/* Contact form — Apple-ish */
.contact-grid {
  grid-template-columns: 1fr !important;
  gap: clamp(32px, 5vw, 56px) !important;
}
@media (min-width: 1068px) { .contact-grid { grid-template-columns: 1fr 1.2fr !important; gap: 80px !important; } }
.form-input, .form-textarea {
  border-radius: 12px !important;
  padding: 14px 16px !important;
  font-size: 16px !important;
  border: 1.5px solid var(--gray-200) !important;
}
.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--cyan) !important;
  box-shadow: 0 0 0 3px var(--cyan-dim) !important;
}
.contact-info-item {
  padding: 20px 0 !important;
  border-bottom: 1px solid var(--gray-100);
  display: flex; gap: 16px; align-items: flex-start;
}
.contact-info-item:last-child { border-bottom: none; }
.contact-icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  display: grid; place-content: center;
  background: var(--cyan-dim);
  color: var(--cyan);
  border-radius: 12px;
  font-size: 20px;
}
.contact-info-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 4px;
}
.contact-info-val {
  font-size: 16px;
  font-weight: 500;
  color: var(--gray-900);
}

/* Footer polish — already there but ensure mobile */
@media (max-width: 743px) {
  .footer-main { grid-template-columns: 1fr !important; gap: 32px !important; }
  .footer-bottom { flex-direction: column !important; gap: 12px !important; text-align: center; }
}


/* ═══════════════════ PHASE 2 · MOBILE UX ═══════════════════ */

/* —— Hamburger → X animation —— */
.nav-mobile-toggle {
  width: 44px; height: 44px; min-width: 44px;
  background: transparent; border: 0;
  display: none; align-items: center; justify-content: center;
  position: relative; cursor: pointer; padding: 0;
}
.nav-bar {
  position: absolute; left: 12px; right: 12px;
  height: 1.5px; background: var(--ink); border-radius: 2px;
  transition: transform .35s var(--ease), top .35s var(--ease), opacity .25s var(--ease);
}
.nav-bar-top    { top: 18px; }
.nav-bar-bottom { top: 26px; }
.nav-mobile-toggle.open .nav-bar-top    { top: 22px; transform: rotate(45deg); }
.nav-mobile-toggle.open .nav-bar-bottom { top: 22px; transform: rotate(-45deg); }

/* —— Full-screen mobile nav overlay —— */
@media (max-width: 900px) {
  .nav-mobile-toggle { display: inline-flex; }
  .nav-links {
    position: fixed; inset: 0;
    flex-direction: column !important;
    align-items: stretch !important; justify-content: flex-start !important;
    background: rgba(251, 251, 253, 0.92);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    backdrop-filter: blur(40px) saturate(180%);
    padding: 96px 24px 32px;
    gap: 0 !important;
    transform: translateY(-100%);
    transition: transform .42s var(--ease);
    z-index: 998;
    overflow-y: auto;
    border: 0; box-shadow: none; border-radius: 0; min-width: 0;
  }
  .nav-links.open { transform: translateY(0); display: flex !important; }
  .nav-links li, .nav-links > * {
    list-style: none; opacity: 0; transform: translateY(8px);
    transition: opacity .35s var(--ease), transform .35s var(--ease);
  }
  .nav-links.open li, .nav-links.open > * { opacity: 1; transform: translateY(0); }
  .nav-links.open li:nth-child(1) { transition-delay: .08s; }
  .nav-links.open li:nth-child(2) { transition-delay: .12s; }
  .nav-links.open li:nth-child(3) { transition-delay: .16s; }
  .nav-links.open li:nth-child(4) { transition-delay: .20s; }
  .nav-links.open li:nth-child(5) { transition-delay: .24s; }
  .nav-links.open li:nth-child(6) { transition-delay: .28s; }
  .nav-links.open li:nth-child(7) { transition-delay: .32s; }
  .nav-links.open li:nth-child(8) { transition-delay: .36s; }
  .nav-link {
    font-size: 28px !important;
    font-weight: 600 !important;
    letter-spacing: var(--tracking-headline) !important;
    color: var(--ink) !important;
    padding: 14px 0 !important;
    border-bottom: 1px solid var(--rule);
    text-transform: none;
    min-height: 56px;
    display: flex; align-items: center;
  }
  .nav-link::after { display: none !important; }
  .nav-cta {
    margin-top: 28px;
    display: inline-flex !important; align-self: flex-start;
    padding: 12px 24px !important;
  }
}

/* —— Sticky mobile CTA bar (mobile only) —— */
.mobile-cta-bar { display: none; }
@media (max-width: 768px) {
  body { padding-bottom: calc(72px + env(safe-area-inset-bottom)); }
  .mobile-cta-bar {
    display: flex; gap: 8px;
    position: fixed; left: 0; right: 0;
    bottom: 0; z-index: 100;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
    background: rgba(251, 251, 253, .94);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    backdrop-filter: blur(28px) saturate(180%);
    border-top: 1px solid var(--rule);
  }
  .mobile-cta {
    flex: 1; min-height: 48px;
    display: inline-flex; align-items: center; justify-content: center;
    gap: 8px; padding: 0 16px;
    border-radius: 999px;
    font-size: 15px; font-weight: 600;
    letter-spacing: var(--tracking-body);
    text-decoration: none;
    transition: transform .15s var(--ease), opacity .15s var(--ease);
  }
  .mobile-cta:active { transform: scale(.97); opacity: .9; }
  .mobile-cta-primary { background: var(--accent); color: #fff; }
  .mobile-cta-ghost {
    background: rgba(0,0,0,.04); color: var(--ink);
    border: 1px solid var(--rule);
  }
  /* Push fixed nav-links overlay above the mobile CTA bar visually (overlay covers screen) */
}

/* —— Scroll-snap carousels (mobile only) —— */
@media (max-width: 768px) {
  .snap-row {
    display: flex !important; flex-direction: row !important;
    gap: 14px !important;
    grid-template-columns: none !important;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 0 var(--ch-pad-x) 8px;
    margin: 0 calc(-1 * var(--ch-pad-x));
    scrollbar-width: none;
  }
  .snap-row::-webkit-scrollbar { display: none; }
  .snap-row > * {
    flex: 0 0 82%;
    scroll-snap-align: start;
    min-width: 0;
  }
}

/* —— Tap-target floor: every interactive primitive ≥ 44px on touch —— */
@media (max-width: 768px) {
  .nav-link, .nav-cta, .footer-col a, .footer-links a,
  .product-filter-tab, .chapter-pill, .chapter-link, .btn {
    min-height: 44px;
    display: inline-flex; align-items: center;
  }
}


/* ═══════════════════ PHASE 3 · PINNED + REDUCED MOTION ═══════════════════ */

/* —— Pinned scroll scene (CSS-only, no JS) ——
   Use: <section class="chapter chapter-pinned">
          <div class="chapter-pinned-media">…image…</div>
          <div class="chapter-pinned-copy">…multiple stacked text blocks…</div>
        </section>
*/
.chapter-pinned .chapter-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}
.chapter-pinned-media {
  position: sticky; top: 96px;
  height: calc(100vh - 140px);
  display: flex; align-items: center; justify-content: center;
}
.chapter-pinned-media > * { max-width: 100%; max-height: 100%; }
.chapter-pinned-copy {
  display: flex; flex-direction: column;
  gap: clamp(80px, 14vw, 180px);   /* generous gaps so each beat scrolls past */
  padding: 8vh 0;
}
@media (max-width: 900px) {
  .chapter-pinned .chapter-inner { grid-template-columns: 1fr; gap: 40px; }
  .chapter-pinned-media { position: static; height: auto; }
  .chapter-pinned-copy { gap: 40px; padding: 0; }
}

/* —— Reduced motion: respect OS-level preference —— */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .15s !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero-orb, .hero-flow::before, .hero-flow::after { animation: none !important; }
}


/* ═══════════════════ PHASE 4 · PRODUCT STAGE + MOTION POLISH ═══════════════════ */

/* —— Product stage: lifted, soft top-down drop-shadow on neutral bg —— */
.product-stage,
.chapter-showcase-visual,
.product-card-visual {
  background: var(--bg);
}
.product-stage img,
.chapter-showcase-visual img,
.product-card-visual img {
  filter: drop-shadow(0 30px 40px rgba(0, 0, 0, 0.10))
          drop-shadow(0 6px 10px rgba(0, 0, 0, 0.04));
}

/* —— Subtle float on hero / showcase products —— */
@keyframes keyuan-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}
.chapter-showcase-visual img,
.chapter-showcase-visual video {
  animation: keyuan-float 6.5s var(--ease) infinite;
  will-change: transform;
}

/* —— Product card hover refinement —— */
.product-card { transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease); }
.product-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }

/* —— Reduced-motion override —— */
@media (prefers-reduced-motion: reduce) {
  .chapter-showcase-visual img,
  .chapter-showcase-visual video { animation: none !important; }
}