/* ============================================================
   Cao Ying Technology — Style System
   Palette: Obsidian & Amber — Unique, high-contrast
   ============================================================ */

/* ----- CSS Custom Properties ----- */
:root {
  --color-bg:        #07090d;
  --color-surface:   #0f1219;
  --color-card:      #151923;
  --color-card-alt:  #1a1f2e;
  --color-border:    #1e2433;
  --color-border-alt:#2a3042;

  --color-accent:    #f59e0b;
  --color-accent-hover: #fbbf24;
  --color-accent-dim:#b45309;
  --color-vermilion: #ef4444;
  --color-teal:      #14b8a6;
  --color-sky:       #38bdf8;
  --color-emerald:   #34d399;

  --color-text:      #f0eee6;
  --color-text-heading: #faf9f5;
  --color-text-muted:#8b8896;
  --color-text-softer:#5c5a6b;

  --color-light:     #faf8f5;
  --color-light-alt: #f3f0eb;
  --color-dark-text: #171717;
  --color-dark-muted:#4a4952;

  --font-mono:       'SF Mono', 'Cascadia Code', 'Consolas', monospace;
  --font-sans:       'Inter', 'SF Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  --radius-sm:       4px;
  --radius-md:       8px;
  --radius-lg:       14px;
  --radius-xl:       20px;

  --shadow-sm:       0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:       0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:       0 8px 40px rgba(0,0,0,0.6);
  --shadow-glow:     0 0 40px rgba(245, 158, 11, 0.15);
  --shadow-glow-teal:0 0 30px rgba(20, 184, 166, 0.12);

  --max-width:       1200px;
  --header-height:   72px;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

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

/* ----- Typography ----- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-heading);
  line-height: 1.2;
  font-weight: 700;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section-tag::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 16px;
  color: var(--color-text-heading);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 580px;
  line-height: 1.7;
}

/* ----- Utility ----- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ============================================================
   HEADER / NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
  background: rgba(7, 9, 13, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-text-heading);
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dim) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
  color: #0a0a0a;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-text);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  width: 100%;
}

.nav-cta {
  padding: 8px 20px;
  background: var(--color-accent);
  color: #0a0a0a !important;
  border-radius: var(--radius-md);
  font-weight: 700 !important;
  font-size: 0.85rem !important;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-cta::after { display: none !important; }

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
  background: var(--color-bg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 40%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 40%, black 30%, transparent 70%);
}

.hero-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
}

.hero-bg-orb--amber {
  width: 500px;
  height: 500px;
  background: var(--color-accent);
  top: -150px;
  right: -100px;
}

.hero-bg-orb--teal {
  width: 400px;
  height: 400px;
  background: var(--color-teal);
  bottom: -120px;
  left: -80px;
  opacity: 0.1;
}

.hero-bg-orb--vermilion {
  width: 300px;
  height: 300px;
  background: var(--color-vermilion);
  top: 40%;
  left: 40%;
  opacity: 0.06;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--color-border-alt);
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  background: var(--color-surface);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-teal);
  box-shadow: 0 0 8px var(--color-teal);
}

.hero-title {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--color-text-heading);
  letter-spacing: -0.02em;
}

.hero-title-accent {
  color: var(--color-accent);
  position: relative;
}

.hero-title-accent::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
  opacity: 0.3;
}

.hero-desc {
  font-size: 1.12rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 560px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-weight: 700;
  font-size: 0.92rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: #0a0a0a;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(245, 158, 11, 0.4);
}

.btn-outline {
  border: 2px solid var(--color-border-alt);
  color: var(--color-text);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 34px;
  font-size: 1rem;
}

.hero-visual {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  width: 44%;
  max-width: 560px;
  pointer-events: none;
}

.hero-card-stack {
  position: relative;
  aspect-ratio: 1 / 1.1;
}

.hero-float-card {
  position: absolute;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-lg);
}

.hero-float-card--a {
  top: 5%;
  right: 10%;
  width: 65%;
  aspect-ratio: 1.4;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}

.hero-float-card--b {
  bottom: 8%;
  left: 5%;
  width: 55%;
  aspect-ratio: 1.3;
  display: flex;
  align-items: center;
  justify-content: center;
  border-color: var(--color-accent);
  border-width: 1px;
}

.card-dots {
  display: flex;
  gap: 6px;
}

.card-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

.card-dot:nth-child(2) { background: var(--color-vermilion); }
.card-dot:nth-child(3) { background: var(--color-teal); }

.card-lines {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-line {
  height: 6px;
  border-radius: 3px;
  background: var(--color-border-alt);
}

.card-line:nth-child(1) { width: 90%; }
.card-line:nth-child(2) { width: 60%; background: var(--color-accent); opacity: 0.5; }
.card-line:nth-child(3) { width: 75%; }

.card-stat-ring {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-accent);
  animation: ring-spin 8s linear infinite;
}

@keyframes ring-spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   SERVICES
   ============================================================ */
.services {
  padding: 100px 0;
  background: var(--color-surface);
  position: relative;
}

.services-header {
  text-align: center;
  margin-bottom: 64px;
}

.services-header .section-subtitle {
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

.service-card:hover {
  border-color: var(--color-border-alt);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

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

.service-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

.service-icon--systems {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-accent);
}

.service-icon--cloud {
  background: rgba(56, 189, 248, 0.1);
  color: var(--color-sky);
}

.service-icon--security {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-vermilion);
}

.service-icon--data {
  background: rgba(20, 184, 166, 0.1);
  color: var(--color-teal);
}

.service-icon--dev {
  background: rgba(52, 211, 153, 0.1);
  color: var(--color-emerald);
}

.service-icon--consult {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-accent);
}

.service-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  padding: 100px 0;
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-diamond {
  width: 100%;
  aspect-ratio: 1;
  max-width: 420px;
  margin: 0 auto;
  position: relative;
}

.about-diamond-shape {
  position: absolute;
  inset: 10%;
  border: 2px solid var(--color-border-alt);
  border-radius: var(--radius-xl);
  transform: rotate(45deg);
  background: var(--color-card);
}

.about-diamond-inner {
  position: absolute;
  inset: 20%;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-dim), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: #0a0a0a;
  font-weight: 900;
}

.about-orbit {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-card);
  border: 2px solid var(--color-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-teal);
  font-size: 1rem;
}

.about-text .section-tag { margin-bottom: 12px; }
.about-text h2 { margin-bottom: 20px; }

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.75;
  font-size: 0.98rem;
}

.about-text p:last-of-type { margin-bottom: 28px; }

.about-attributes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.about-attr {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.about-attr-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-accent);
}

.about-attr span {
  font-size: 0.92rem;
  color: var(--color-text);
}

/* ============================================================
   PROCESS
   ============================================================ */
.process {
  padding: 100px 0;
  background: var(--color-surface);
}

.process-header {
  text-align: center;
  margin-bottom: 64px;
}

.process-header .section-subtitle {
  margin: 0 auto;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: var(--color-border);
  z-index: 0;
}

.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 20px;
}

.process-step-num {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--color-card);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text-heading);
  margin: 0 auto 20px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.process-step:hover .process-step-num {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.process-step h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   INDUSTRIES
   ============================================================ */
.industries {
  padding: 100px 0;
  background: var(--color-bg);
}

.industries-header {
  margin-bottom: 48px;
}

.industries-marquee {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.industry-tile {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.industry-tile:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.industry-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.industry-tile h4 {
  font-size: 0.98rem;
  margin-bottom: 6px;
}

.industry-tile p {
  font-size: 0.84rem;
  color: var(--color-text-muted);
}

/* ============================================================
   STATS
   ============================================================ */
.stats {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--color-card) 0%, var(--color-card-alt) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item {
  padding: 24px 16px;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  padding: 100px 0;
  background: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--color-text-muted);
  margin-bottom: 28px;
  line-height: 1.7;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-detail {
  display: flex;
  align-items: center;
  gap: 14px;
}

.contact-detail-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-accent);
  font-size: 1rem;
}

.contact-detail-text strong {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-heading);
  margin-bottom: 2px;
}

.contact-detail-text span {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.contact-form-wrap {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.93rem;
  font-family: var(--font-sans);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-softer);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-submit {
  width: 100%;
  padding: 14px;
  background: var(--color-accent);
  color: #0a0a0a;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

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

.form-response {
  margin-top: 16px;
  font-size: 0.9rem;
  font-weight: 600;
  min-height: 24px;
}

.form-response.success {
  color: var(--color-teal);
}

.form-response.error {
  color: var(--color-vermilion);
}

/* ============================================================
   CTA
   ============================================================ */
.cta-section {
  padding: 90px 0;
  background: var(--color-surface);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--color-text-muted);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  padding: 64px 0 32px;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 8px;
}

.footer-col h4 {
  font-size: 0.9rem;
  margin-bottom: 18px;
  color: var(--color-text-heading);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--color-text-softer);
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  font-size: 0.82rem;
  color: var(--color-text-softer);
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: var(--color-text-muted);
}

/* ============================================================
   POLICY PAGES (privacy, terms)
   ============================================================ */
.policy-page {
  padding: 120px 0 80px;
  background: var(--color-bg);
  min-height: 100vh;
}

.policy-content {
  max-width: 760px;
  margin: 0 auto;
}

.policy-content h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.policy-content .last-updated {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 36px;
}

.policy-content h2 {
  font-size: 1.3rem;
  margin-top: 36px;
  margin-bottom: 12px;
  color: var(--color-text-heading);
}

.policy-content p,
.policy-content li {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 12px;
}

.policy-content ul {
  list-style: disc;
  padding-left: 22px;
  margin-bottom: 16px;
}

.policy-content ul li {
  margin-bottom: 8px;
}

.policy-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

.policy-home-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
  transition: color var(--transition-fast);
}

.policy-home-link:hover {
  color: var(--color-accent);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  .hero-visual {
    display: none;
  }

  .hero-content {
    max-width: 100%;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .process-steps::before {
    display: none;
  }

  .industries-marquee {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .nav-links {
    position: fixed;
    top: 0; right: 0;
    width: 280px;
    height: 100vh;
    background: var(--color-surface);
    flex-direction: column;
    padding: 100px 32px 32px;
    gap: 24px;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    border-left: 1px solid var(--color-border);
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-diamond {
    max-width: 280px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .industries-marquee {
    grid-template-columns: 1fr 1fr;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .industries-marquee {
    grid-template-columns: 1fr;
  }

  .about-attributes {
    grid-template-columns: 1fr;
  }
}