/* ============================================
   Yao Cheer — Professional Company Website
   Stylesheet
   ============================================ */

/* --- CSS Variables / Theme --- */
:root {
  --color-primary: #0c1a2d;
  --color-primary-light: #162a45;
  --color-secondary: #1e3a5f;
  --color-accent: #0891b2;
  --color-accent-light: #22d3ee;
  --color-accent-dark: #0369a1;
  --color-accent-gradient: linear-gradient(135deg, #0891b2 0%, #0284c7 50%, #0369a1 100%);
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0c1a2d;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-on-dark: #e2e8f0;
  --color-border: #e2e8f0;
  --color-card-bg: #ffffff;
  --color-success: #10b981;
  --color-warning: #f59e0b;

  --font-primary: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(8, 145, 178, 0.15);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

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

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  line-height: 1.7;
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

ul {
  list-style: none;
}

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

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(8, 145, 178, 0.08);
  color: var(--color-accent);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-light);
  max-width: 600px;
  line-height: 1.7;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(12, 26, 45, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  height: var(--nav-height);
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(12, 26, 45, 0.98);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.375rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-accent-gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1rem;
  color: #fff;
}

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

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  padding: 6px 0;
  position: relative;
  transition: var(--transition);
}

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

.nav-links a:hover {
  color: #ffffff;
}

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: var(--color-accent-gradient);
  color: #ffffff !important;
  border-radius: 100px;
  font-weight: 600 !important;
  font-size: 0.875rem !important;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(8, 145, 178, 0.3);
}

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

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(8, 145, 178, 0.4);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  width: 26px;
  height: 2.5px;
  background: #ffffff;
  border-radius: 4px;
  transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-primary);
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 10% 20%, rgba(8, 145, 178, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(2, 132, 199, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(8, 145, 178, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(8, 145, 178, 0.12);
  border: 1px solid rgba(8, 145, 178, 0.2);
  color: var(--color-accent-light);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-title .highlight {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.1875rem;
  color: var(--color-text-on-dark);
  line-height: 1.8;
  max-width: 640px;
  margin-bottom: 40px;
  opacity: 0.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(8, 145, 178, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(8, 145, 178, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--color-accent);
  color: #ffffff;
}

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
  margin-bottom: 4px;
}

.hero-stat-value .accent {
  color: var(--color-accent-light);
}

.hero-stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  font-weight: 500;
}

/* --- About Section --- */
.about {
  padding: 120px 0;
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-accent-gradient);
  padding: 48px;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-image-content {
  text-align: center;
  color: #ffffff;
}

.about-image-content .big-number {
  font-size: 5rem;
  font-weight: 900;
  line-height: 1;
  opacity: 0.3;
  display: block;
}

.about-image-content .company-name {
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 12px;
}

.about-image-content .company-tagline {
  font-size: 1rem;
  opacity: 0.8;
  margin-top: 8px;
}

.about-experience-badge {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: #ffffff;
  padding: 24px 32px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.about-experience-badge .number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
}

.about-experience-badge .label {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  font-weight: 500;
  margin-top: 2px;
}

.about-text .section-title {
  margin-bottom: 20px;
}

.about-text p {
  color: var(--color-text-light);
  font-size: 1.0625rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}

.about-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
}

.about-feature-item .check {
  width: 22px;
  height: 22px;
  background: rgba(8, 145, 178, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* --- Services Section --- */
.services {
  padding: 120px 0;
  background: var(--color-bg-alt);
}

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

.service-card {
  background: var(--color-card-bg);
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent-gradient);
  opacity: 0;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon {
  width: 56px;
  height: 56px;
  background: rgba(8, 145, 178, 0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: var(--color-accent-gradient);
  color: #ffffff;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-link {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-link:hover {
  gap: 12px;
}

/* --- Expertise / Process Section --- */
.expertise {
  padding: 120px 0;
  background: var(--color-bg);
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.expertise-card {
  padding: 36px 32px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-card-bg);
  display: flex;
  gap: 20px;
  transition: var(--transition);
}

.expertise-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.expertise-number {
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(8, 145, 178, 0.12);
  line-height: 1;
  flex-shrink: 0;
  min-width: 48px;
}

.expertise-card h4 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.expertise-card p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- Why Choose Us --- */
.why-us {
  padding: 120px 0;
  background: var(--color-bg-dark);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.why-us::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 0% 50%, rgba(8, 145, 178, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 100% 50%, rgba(2, 132, 199, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.why-us .container {
  position: relative;
  z-index: 1;
}

.why-us .section-title {
  color: #ffffff;
}

.why-us .section-subtitle {
  color: rgba(255, 255, 255, 0.6);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 16px;
}

.why-card {
  text-align: center;
  padding: 40px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.why-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(8, 145, 178, 0.3);
  transform: translateY(-4px);
}

.why-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: rgba(8, 145, 178, 0.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: var(--transition);
}

.why-card:hover .why-icon {
  background: var(--color-accent-gradient);
}

.why-card h4 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #ffffff;
}

.why-card p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
}

/* --- Stats Bar --- */
.stats-bar {
  padding: 80px 0;
  background: var(--color-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.75rem;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-number .plus {
  color: var(--color-accent-light);
  font-size: 2rem;
}

.stat-label {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 500;
}

/* --- Contact Section --- */
.contact {
  padding: 120px 0;
  background: var(--color-bg-alt);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.contact-info > p {
  color: var(--color-text-light);
  font-size: 1.0625rem;
  margin-bottom: 36px;
  line-height: 1.7;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-detail-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-detail-icon {
  width: 48px;
  height: 48px;
  background: rgba(8, 145, 178, 0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-detail-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.contact-detail-item p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.contact-form-wrapper {
  background: var(--color-card-bg);
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.contact-form-wrapper h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--color-text);
  transition: var(--transition);
  background: var(--color-bg-alt);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
  background: #ffffff;
}

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

.btn-submit {
  width: 100%;
  padding: 14px 32px;
  background: var(--color-accent-gradient);
  color: #ffffff;
  border: none;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(8, 145, 178, 0.35);
}

/* --- Footer --- */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-brand .nav-logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9375rem;
  line-height: 1.7;
  max-width: 320px;
  color: rgba(255, 255, 255, 0.5);
}

.footer h4 {
  color: #ffffff;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-accent-light);
  padding-left: 4px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-item {
  display: flex;
  gap: 12px;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.5;
}

.footer-contact-item .icon {
  color: var(--color-accent-light);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.35);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.35);
  font-size: 0.875rem;
}

.footer-bottom-links a:hover {
  color: var(--color-accent-light);
}

/* --- Page Header (inner pages) --- */
.page-header {
  padding: 160px 0 80px;
  background: var(--color-primary);
  position: relative;
  overflow: hidden;
}

.page-header-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 30% 30%, rgba(8, 145, 178, 0.1) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 70%, rgba(2, 132, 199, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header h1 {
  font-size: 2.75rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 600px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
  color: var(--color-accent-light);
}

.breadcrumb .sep {
  opacity: 0.4;
}

/* --- Content Pages (Privacy, TOS) --- */
.content-page {
  padding: 80px 0 120px;
  background: var(--color-bg-alt);
}

.content-container {
  max-width: 860px;
  margin: 0 auto;
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 56px 64px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.content-container .last-updated {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.content-container h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 40px;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.content-container h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 28px;
  margin-bottom: 12px;
}

.content-container p {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 16px;
}

.content-container ul,
.content-container ol {
  margin: 16px 0;
  padding-left: 24px;
}

.content-container li {
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 8px;
}

.content-container ul li {
  list-style: disc;
}

.content-container ol li {
  list-style: decimal;
}

.content-container strong {
  color: var(--color-primary);
  font-weight: 700;
}

.content-container .highlight-box {
  background: rgba(8, 145, 178, 0.04);
  border-left: 3px solid var(--color-accent);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.content-container .highlight-box p:last-child {
  margin-bottom: 0;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--color-accent-gradient);
  color: #ffffff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* --- Mobile Nav Overlay --- */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-visual {
    order: -1;
  }

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

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

  .content-container {
    padding: 40px 32px;
  }

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

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(12, 26, 45, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    padding: 14px 16px;
    width: 100%;
    border-radius: var(--radius-sm);
  }

  .nav-links a:hover {
    background: rgba(255, 255, 255, 0.04);
  }

  .nav-links a::after {
    display: none;
  }

  .nav-cta {
    margin-top: 8px;
    text-align: center;
    justify-content: center;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }

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

  .btn {
    width: 100%;
    justify-content: center;
  }

  .section-title {
    font-size: 1.75rem;
  }

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

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

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

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

  .page-header h1 {
    font-size: 2rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .content-container {
    padding: 28px 20px;
  }

  .hero-stats {
    margin-top: 40px;
    padding-top: 28px;
  }

  .contact-form-wrapper {
    padding: 24px;
  }

  .expertise-card {
    flex-direction: column;
    gap: 12px;
  }
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-in-delay-1 {
  animation-delay: 0.1s;
}

.animate-in-delay-2 {
  animation-delay: 0.2s;
}

.animate-in-delay-3 {
  animation-delay: 0.3s;
}

/* Scroll-triggered animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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