/* ============================================
   JAYDON SOLUTION — Design System & Global Styles
   Modern Engineering-Grade B2B Building Materials
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  /* Color System — OKLCH-based */
  --color-primary: oklch(35% 0.1 240);        /* Deep Navy */
  --color-primary-light: oklch(45% 0.08 240); /* Lighter Navy */
  --color-primary-dark: oklch(22% 0.08 240);  /* Darkest Navy */
  
  --color-accent: oklch(72% 0.15 55);         /* Warm Gold */
  --color-accent-light: oklch(85% 0.1 55);
  --color-accent-dark: oklch(55% 0.12 55);
  
  --color-surface: oklch(97% 0.005 60);       /* Warm White */
  --color-surface-alt: oklch(94% 0.005 60);
  --color-surface-inverted: oklch(15% 0.01 240); /* Dark surface */
  
  --color-text-primary: oklch(18% 0.02 240);  /* Near-black, cool tint */
  --color-text-secondary: oklch(35% 0.015 240);
  --color-text-muted: oklch(55% 0.01 240);
  --color-text-on-dark: oklch(95% 0.005 60);
  --color-text-accent: var(--color-accent-dark);
  
  --color-border: oklch(88% 0.008 240);
  --color-border-strong: oklch(72% 0.01 240);
  
  --color-success: oklch(65% 0.15 145);
  --color-error: oklch(60% 0.18 25);
  
  /* Typography */
  --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.25vw, 0.9rem);
  --text-base: clamp(0.95rem, 0.9rem + 0.25vw, 1.05rem);
  --text-lg: clamp(1.15rem, 1.05rem + 0.5vw, 1.35rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.5vw, 2.2rem);
  --text-2xl: clamp(2rem, 1.5rem + 2.5vw, 3.2rem);
  --text-3xl: clamp(2.5rem, 1.8rem + 3.5vw, 4.5rem);
  --text-hero: clamp(3rem, 2rem + 5vw, 6rem);
  
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;
  
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;
  
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.04em;
  --tracking-wider: 0.08em;
  
  /* Spacing — 4pt base */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;
  --space-section: clamp(4rem, 3rem + 5vw, 8rem);
  
  /* Layout */
  --max-width: 1280px;
  --max-width-narrow: 900px;
  --content-padding: clamp(1.25rem, 1rem + 2vw, 3rem);
  
  /* Easing */
  --ease-out: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.22, 1, 0.36, 1);
  
  /* Transitions */
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 800ms;
  
  /* Shadows — Subtle elevation */
  --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.04);
  --shadow-md: 0 4px 12px oklch(0% 0 0 / 0.06);
  --shadow-lg: 0 8px 30px oklch(0% 0 0 / 0.08);
  --shadow-xl: 0 16px 50px oklch(0% 0 0 / 0.1);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--content-padding);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

.section-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-4);
  display: inline-block;
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-6);
  max-width: 700px;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 640px;
}

.text-accent {
  color: var(--color-accent-dark);
}

.text-muted {
  color: var(--color-text-muted);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-sm);
  transition: all var(--duration-base) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-dark);
}

.btn--primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn--outline {
  border: 1.5px solid var(--color-border-strong);
  color: var(--color-text-primary);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--accent {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

.btn--accent:hover {
  background-color: var(--color-accent-dark);
  color: var(--color-text-on-dark);
  transform: translateY(-1px);
}

.btn--white {
  background-color: white;
  color: var(--color-primary);
}

.btn--white:hover {
  background-color: var(--color-surface-alt);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn--lg {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-base);
}

/* --- Section Shared --- */
.section {
  padding-block: var(--space-section);
}

.section--dark {
  background-color: var(--color-primary-dark);
  color: var(--color-text-on-dark);
}

.section--dark .section-title {
  color: var(--color-text-on-dark);
}

.section--dark .section-subtitle {
  color: oklch(80% 0.008 60);
}

.section--alt {
  background-color: var(--color-surface-alt);
}

.section--inverted {
  background-color: var(--color-primary);
  color: var(--color-text-on-dark);
}

.section--inverted .section-title {
  color: var(--color-text-on-dark);
}

.section--inverted .section-subtitle {
  color: oklch(80% 0.008 60);
}

.section-header {
  margin-bottom: var(--space-16);
}

.section-header--center {
  text-align: center;
}

.section-header--center .section-subtitle {
  margin-inline: auto;
}

.divider {
  width: 60px;
  height: 2px;
  background-color: var(--color-accent);
  margin-top: var(--space-6);
}

/* --- Scroll Reveal Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) 0;
  transition: all var(--duration-base) var(--ease-out);
}

.nav.scrolled {
  background-color: oklch(12% 0.01 240 / 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-3) 0;
  box-shadow: 0 1px 0 oklch(100% 0 0 / 0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--content-padding);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: white;
  letter-spacing: var(--tracking-tight);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__logo-mark {
  width: 36px;
  height: 36px;
  background-color: var(--color-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--weight-extrabold);
  color: var(--color-primary-dark);
  letter-spacing: -0.05em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: oklch(85% 0.008 60);
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__link:hover,
.nav__link.active {
  color: white;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--color-accent);
  transition: width var(--duration-base) var(--ease-out);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.lang-switch {
  display: flex;
  align-items: center;
  background-color: oklch(100% 0 0 / 0.08);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.lang-btn {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  padding: var(--space-2) var(--space-3);
  color: oklch(70% 0.008 60);
  transition: all var(--duration-fast);
  letter-spacing: var(--tracking-wide);
}

.lang-btn.active {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

.lang-btn:hover:not(.active) {
  color: white;
}

.nav__cta {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-xs);
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  border-radius: var(--radius-sm);
  font-weight: var(--weight-semibold);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav__cta:hover {
  background-color: var(--color-accent-light);
  transform: translateY(-1px);
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}

.nav__toggle span {
  display: block;
  height: 2px;
  background-color: white;
  border-radius: 2px;
  transition: all var(--duration-base) var(--ease-out);
}

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-color: var(--color-primary-dark);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  filter: saturate(0.3);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    oklch(12% 0.02 240 / 0.92) 0%,
    oklch(18% 0.03 240 / 0.75) 50%,
    oklch(12% 0.02 240 / 0.85) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--content-padding);
  padding-top: 100px;
  padding-bottom: var(--space-section);
}

.hero__label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.hero__label::before {
  content: '';
  width: 32px;
  height: 1.5px;
  background-color: var(--color-accent);
}

.hero__title {
  font-size: var(--text-hero);
  font-weight: var(--weight-extrabold);
  color: white;
  line-height: 1.08;
  margin-bottom: var(--space-8);
  max-width: 850px;
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: oklch(78% 0.01 60);
  line-height: var(--leading-relaxed);
  max-width: 600px;
  margin-bottom: var(--space-10);
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: oklch(60% 0.008 60);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  animation: float 3s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

/* Stats bar at bottom of hero */
.hero__stats {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--content-padding);
  margin-top: calc(-1 * var(--space-16));
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-10);
  box-shadow: var(--shadow-xl);
}

.stat {
  text-align: center;
  position: relative;
}

.stat:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 10%;
  height: 80%;
  width: 1px;
  background-color: oklch(100% 0 0 / 0.1);
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.stat__label {
  font-size: var(--text-xs);
  color: oklch(75% 0.008 60);
  letter-spacing: var(--tracking-wide);
}

/* ============================================
   ADVANTAGES / ROTATING HIGHLIGHTS
   ============================================ */
.advantages {
  padding-top: calc(var(--space-section) + var(--space-16));
}

.advantages__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-12);
}

.advantage-card {
  padding: var(--space-10);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-out);
}

.advantage-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.advantage-card:hover::before {
  transform: scaleX(1);
}

.advantage-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: oklch(95% 0.02 240);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
  font-size: var(--text-xl);
}

.advantage-card__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-4);
}

.advantage-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.about__text p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.about__text p:last-of-type {
  margin-bottom: var(--space-8);
}

.about__visual {
  position: relative;
}

.about__image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background-color: var(--color-primary-light);
}

.about__image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about__badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  padding: var(--space-6) var(--space-8);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.about__badge-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-extrabold);
  line-height: 1;
}

.about__badge-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
}

/* Dual Hub Diagram */
.dual-hub {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-8);
  align-items: center;
  margin-top: var(--space-12);
}

.hub {
  text-align: center;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.hub__city {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-3);
}

.hub__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-4);
}

.hub__role {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.hub__items {
  margin-top: var(--space-4);
}

.hub__item {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
}

.hub__item:last-child {
  border-bottom: none;
}

.hub-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-accent-dark);
}

.hub-connector__line {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent));
  position: relative;
}

.hub-connector__line::before,
.hub-connector__line::after {
  content: '';
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  background: white;
}

.hub-connector__line::before { left: -4px; }
.hub-connector__line::after { right: -4px; }

.hub-connector__arrows {
  font-size: var(--text-lg);
  color: var(--color-accent);
}

.hub-connector__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ============================================
   SOLUTIONS SECTION
   ============================================ */
.solutions__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.solution-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  cursor: pointer;
  transition: transform var(--duration-base) var(--ease-out);
}

.solution-card:hover {
  transform: translateY(-4px);
}

.solution-card__bg {
  position: absolute;
  inset: 0;
  background-color: var(--color-primary-light);
  transition: transform var(--duration-slow) var(--ease-out);
}

.solution-card:hover .solution-card__bg {
  transform: scale(1.05);
}

.solution-card__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.solution-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, oklch(15% 0.02 240 / 0.95) 0%, oklch(15% 0.02 240 / 0.3) 60%, transparent 100%);
}

.solution-card__content {
  position: relative;
  z-index: 1;
  padding: var(--space-8);
  color: white;
}

.solution-card__icon {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

.solution-card__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: white;
  margin-bottom: var(--space-3);
}

.solution-card__desc {
  font-size: var(--text-sm);
  color: oklch(80% 0.008 60);
  line-height: var(--leading-relaxed);
}

.solution-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.solution-card__tag {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border: 1px solid oklch(100% 0 0 / 0.2);
  border-radius: 100px;
  color: oklch(85% 0.008 60);
}

/* ============================================
   PROCESS SECTION
   ============================================ */
.process__timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0;
  margin-top: var(--space-12);
  padding-top: var(--space-8);
}

.process__timeline::before {
  content: '';
  position: absolute;
  top: var(--space-8);
  left: 5%;
  right: 5%;
  height: 2px;
  background-color: var(--color-border);
}

.process__step {
  position: relative;
  text-align: center;
  padding: 0 var(--space-4);
}

.process__step-marker {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  position: relative;
  z-index: 1;
  transition: all var(--duration-base) var(--ease-out);
}

.process__step:hover .process__step-marker {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  transform: scale(1.15);
}

.process__step-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-2);
}

.process__step-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.process__note {
  text-align: center;
  margin-top: var(--space-8);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

/* ============================================
   PRODUCTS SECTION
   ============================================ */
.products__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-10);
  justify-content: center;
}

.products__nav-btn {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  padding: var(--space-3) var(--space-5);
  border-radius: 100px;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.products__nav-btn:hover,
.products__nav-btn.active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.product-card {
  background-color: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-out);
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.product-card__image {
  aspect-ratio: 4/3;
  background-color: var(--color-surface-alt);
  overflow: hidden;
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.product-card:hover .product-card__image img {
  transform: scale(1.06);
}

.product-card__body {
  padding: var(--space-6);
}

.product-card__category {
  font-size: var(--text-xs);
  color: var(--color-accent-dark);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.product-card__name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-3);
}

.product-card__specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.product-card__spec {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

.product-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.product-card__cert {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.product-card__inquiry {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: gap var(--duration-fast) var(--ease-out);
}

.product-card__inquiry:hover {
  gap: var(--space-3);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.contact__info-item {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}

.contact__info-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: oklch(95% 0.02 240);
  border-radius: var(--radius-md);
  font-size: var(--text-lg);
}

.contact__info-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.contact__info-value {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
}

.contact__info-value a {
  color: var(--color-primary);
  transition: color var(--duration-fast);
}

.contact__info-value a:hover {
  color: var(--color-accent-dark);
}

.contact__socials {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.contact__social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  font-size: var(--text-lg);
  transition: all var(--duration-fast) var(--ease-out);
}

.contact__social-link:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.contact__form {
  background-color: white;
  padding: var(--space-10);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.form__group {
  margin-bottom: var(--space-5);
}

.form__label {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  outline: none;
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(35% 0.1 240 / 0.1);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.form__submit {
  width: 100%;
  margin-top: var(--space-4);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background-color: var(--color-primary-dark);
  color: oklch(80% 0.008 60);
  padding-block: var(--space-16);
}

.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid oklch(100% 0 0 / 0.08);
}

.footer__brand-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-top: var(--space-5);
  max-width: 320px;
}

.footer__heading {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: white;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}

.footer__links li {
  margin-bottom: var(--space-3);
}

.footer__links a {
  font-size: var(--text-sm);
  color: oklch(70% 0.008 60);
  transition: color var(--duration-fast);
}

.footer__links a:hover {
  color: white;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  font-size: var(--text-xs);
  color: oklch(55% 0.008 60);
}

/* ============================================
   FLOATING CONTACT (LINE/WeChat/WhatsApp)
   ============================================ */
.floating-contacts {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.floating-contacts__btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: var(--shadow-lg);
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
}

.floating-contacts__btn:hover {
  transform: translateY(-3px) scale(1.1);
  box-shadow: var(--shadow-xl);
}

.floating-contacts__btn--line {
  background-color: #06C755;
  color: white;
}

.floating-contacts__btn--wechat {
  background-color: #07C160;
  color: white;
}

.floating-contacts__btn--whatsapp {
  background-color: #25D366;
  color: white;
}

.floating-contacts__btn--email {
  background-color: var(--color-primary);
  color: white;
}

.floating-contacts__tooltip {
  position: absolute;
  right: 62px;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--color-primary-dark);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.floating-contacts__btn:hover .floating-contacts__tooltip {
  opacity: 1;
}

/* Floating QR Code Popup */
.floating-contacts__qr {
  position: absolute;
  right: 62px;
  top: 50%;
  transform: translateY(-50%);
  background-color: white;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-out);
  width: 180px;
  text-align: center;
  z-index: 1000;
}

.floating-contacts__qr::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: white;
}

.floating-contacts__btn:hover .floating-contacts__qr {
  opacity: 1;
  pointer-events: all;
}

.floating-contacts__qr-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.floating-contacts__qr-account {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.floating-contacts__qr-img {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  background-color: var(--color-surface);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.floating-contacts__qr-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  left: var(--space-8);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--duration-base) var(--ease-out);
  z-index: 900;
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

/* ============================================
   MOBILE NAV OVERLAY
   ============================================ */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 999;
  background-color: oklch(12% 0.02 240 / 0.98);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav__link {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: white;
  transition: color var(--duration-fast);
}

.mobile-nav__link:hover {
  color: var(--color-accent);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .nav__links {
    display: none;
  }
  
  .nav__toggle {
    display: flex;
  }
  
  .about__layout,
  .contact__layout {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
  
  .dual-hub {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .hub-connector {
    flex-direction: row;
  }
  
  .hub-connector__line {
    width: 2px;
    height: 40px;
  }
  
  .hub-connector__line::before,
  .hub-connector__line::after {
    left: 50%;
    transform: translateX(-50%);
    top: -4px;
    bottom: auto;
  }
  
  .hub-connector__line::after {
    top: auto;
    bottom: -4px;
  }
  
  .footer__top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .advantages__grid {
    grid-template-columns: 1fr;
  }
  
  .solutions__grid {
    grid-template-columns: 1fr;
  }
  
  .solution-card {
    min-height: 260px;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
  
  .stat:nth-child(2)::after {
    display: none;
  }
  
  .process__timeline {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .form__row {
    grid-template-columns: 1fr;
  }
  
  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer__top {
    grid-template-columns: 1fr;
  }
  
  .footer__bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
  
  .floating-contacts {
    bottom: var(--space-5);
    right: var(--space-5);
  }
  
  .floating-contacts__btn {
    width: 46px;
    height: 46px;
    font-size: 18px;
  }
}

@media (max-width: 480px) {
  .process__timeline {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .products__grid {
    grid-template-columns: 1fr;
  }
  
  .about__badge {
    right: var(--space-4);
    bottom: -10px;
  }
}

/* ============================================
   PRODUCT DETAIL MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background-color: oklch(0% 0 0 / 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
  padding: var(--content-padding);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background-color: white;
  border-radius: var(--radius-xl);
  max-width: 720px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--duration-base) var(--ease-out);
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal__close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: oklch(0% 0 0 / 0.06);
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  transition: all var(--duration-fast);
}

.modal__close:hover {
  background-color: oklch(0% 0 0 / 0.12);
}

.modal__image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  background-color: var(--color-surface-alt);
}

.modal__body {
  padding: var(--space-10);
  position: relative;
}

.modal__category {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-2);
}

.modal__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-6);
}

.modal__desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.modal__specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.modal__spec-item {
  padding: var(--space-4);
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
}

.modal__spec-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.modal__spec-value {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
}

.modal__certifications {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.modal__cert-badge {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  padding: var(--space-2) var(--space-4);
  background-color: oklch(95% 0.04 145);
  color: oklch(30% 0.08 145);
  border-radius: var(--radius-sm);
}

.modal__actions {
  display: flex;
  gap: var(--space-4);
}