/* ============================================
   千引科技企業社 — Corporate Website Styles
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+TC:wght@300;400;500;700;900&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Primary Palette */
  --primary: #0A66C2;
  --primary-light: #3B8DE0;
  --primary-dark: #064A8A;
  --primary-glow: rgba(10, 102, 194, 0.35);

  /* Accent */
  --accent: #00D4AA;
  --accent-light: #33E0BF;

  /* Neutrals */
  --dark: #0F1629;
  --dark-card: #161B33;
  --dark-surface: #1C2240;
  --grey-900: #1A1A2E;
  --grey-800: #2A2A3E;
  --grey-700: #3A3A4E;
  --grey-600: #5A5A6E;
  --grey-400: #9A9AAE;
  --grey-300: #B0B0C0;
  --grey-200: #D0D0DE;
  --grey-100: #E8E8F0;
  --grey-50: #F4F4FA;
  --white: #FFFFFF;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0F1629 0%, #1A1A2E 40%, #0A2A5E 100%);
  --gradient-card: linear-gradient(145deg, #1C2240 0%, #161B33 100%);
  --gradient-primary: linear-gradient(135deg, #0A66C2 0%, #00D4AA 100%);
  --gradient-pricing: linear-gradient(180deg, rgba(10,102,194,0.08) 0%, transparent 100%);

  /* Typography */
  --font-primary: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Noto Sans TC', 'Inter', sans-serif;

  /* Sizing */
  --max-width: 1200px;
  --nav-height: 72px;
  --border-radius: 16px;
  --border-radius-sm: 8px;
  --border-radius-lg: 24px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.16);
  --shadow-glow: 0 0 30px rgba(10, 102, 194, 0.3);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 0.3s var(--ease-out);
  --transition-slow: 0.6s var(--ease-out);
}

/* ---------- 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);
  background: var(--white);
  color: var(--grey-900);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

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

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

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
}

.section-label::before {
  content: '';
  width: 32px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--grey-900);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--grey-600);
  max-width: 600px;
  line-height: 1.8;
}

/* ---------- Scroll Animation ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--white);
  transition: color var(--transition-base);
}

.navbar.scrolled .nav-logo {
  color: var(--grey-900);
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--white);
  font-weight: 800;
}

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

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition-base);
  position: relative;
}

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

.nav-links a:hover {
  color: var(--white);
}

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

.navbar.scrolled .nav-links a {
  color: var(--grey-600);
}

.navbar.scrolled .nav-links a:hover {
  color: var(--primary);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar.scrolled .nav-toggle span {
  background: var(--grey-900);
}

.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: var(--gradient-hero);
  overflow: hidden;
}

/* Animated grid background */
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: -50%;
  background-image:
    linear-gradient(rgba(10, 102, 194, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 102, 194, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}

/* Floating orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: var(--primary);
  top: -10%;
  right: -5%;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 350px;
  height: 350px;
  background: var(--accent);
  bottom: -5%;
  left: 10%;
  animation-delay: -4s;
}

.hero-orb-3 {
  width: 250px;
  height: 250px;
  background: #6C63FF;
  top: 40%;
  left: 50%;
  animation-delay: -2s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: 120px 0 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(10, 102, 194, 0.15);
  border: 1px solid rgba(10, 102, 194, 0.3);
  border-radius: 100px;
  padding: 8px 20px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent-light);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero h1 .text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--grey-400);
  line-height: 1.9;
  margin-bottom: 40px;
  max-width: 560px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-primary);
  color: var(--white);
  font-size: 1rem;
  font-weight: 600;
  padding: 16px 36px;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px var(--primary-glow);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--primary-glow);
}

.hero-cta svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-base);
}

.hero-cta:hover svg {
  transform: translateX(4px);
}

/* Hero stats */
.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-stat h3 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 6px;
}

.hero-stat h3 span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat p {
  font-size: 0.82rem;
  color: var(--grey-400);
  margin: 0;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
  padding: 120px 0;
  background: var(--white);
}

.about-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.about-text {
  font-size: 1.02rem;
  color: var(--grey-600);
  line-height: 1.9;
  margin-bottom: 20px;
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 40px;
}

.about-value {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  background: var(--grey-50);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--grey-100);
  transition: all var(--transition-base);
}

.about-value:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.about-value-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background: rgba(10, 102, 194, 0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.about-value h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--grey-900);
  margin-bottom: 4px;
}

.about-value p {
  font-size: 0.88rem;
  color: var(--grey-600);
  line-height: 1.6;
}

/* ============================================
   ABOUT & SERVICES
   ============================================ */
.services {
  padding: 120px 0;
  background: var(--grey-50);
  position: relative;
}

.services-header {
  text-align: center;
  margin-bottom: 72px;
}

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

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

.service-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 40px;
  border: 1px solid var(--grey-100);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

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

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

.service-card-icon {
  width: 56px;
  height: 56px;
  background: rgba(10, 102, 194, 0.08);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.service-card-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.badge-flagship {
  background: rgba(10, 102, 194, 0.1);
  color: var(--primary);
}

.badge-live {
  background: rgba(0, 212, 170, 0.1);
  color: #00A885;
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--grey-900);
  margin-bottom: 12px;
}

.service-card .desc {
  font-size: 0.95rem;
  color: var(--grey-600);
  margin-bottom: 24px;
  line-height: 1.8;
}

/* Tags */
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.service-tag {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 100px;
  background: var(--grey-50);
  color: var(--grey-700);
  border: 1px solid var(--grey-200);
  transition: all var(--transition-base);
}

.service-tag:hover {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* Platform screenshot */
.platform-preview {
  margin-top: 16px;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  border: 1px solid var(--grey-200);
  box-shadow: var(--shadow-sm);
}

.platform-preview img {
  width: 100%;
  transition: transform 0.6s var(--ease-out);
}

.platform-preview:hover img {
  transform: scale(1.02);
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 16px;
  transition: gap var(--transition-base);
}

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

/* ============================================
   PRICING SECTION
   ============================================ */
.pricing {
  padding: 120px 0;
  background: var(--white);
}

.pricing-header {
  text-align: center;
  margin-bottom: 24px;
}

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

.pricing-model {
  text-align: center;
  margin-bottom: 56px;
}

.pricing-model p {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(10, 102, 194, 0.06);
  border: 1px solid rgba(10, 102, 194, 0.12);
  border-radius: 100px;
  padding: 12px 24px;
  font-size: 0.9rem;
  color: var(--primary-dark);
  font-weight: 500;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--white);
  border: 1px solid var(--grey-200);
  border-radius: var(--border-radius);
  padding: 40px 32px;
  text-align: center;
  position: relative;
  transition: all var(--transition-base);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
  transform: scale(1.04);
}

.pricing-card.featured:hover {
  transform: scale(1.04) translateY(-6px);
}

.pricing-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 20px;
  border-radius: 100px;
  letter-spacing: 0.5px;
}

.pricing-card-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  background: rgba(10, 102, 194, 0.08);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.pricing-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--grey-900);
  margin-bottom: 8px;
}

.pricing-points {
  font-size: 0.85rem;
  color: var(--grey-600);
  margin-bottom: 16px;
}

.pricing-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 8px;
}

.pricing-currency {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--grey-700);
}

.pricing-value {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--grey-900);
  line-height: 1;
}

.pricing-per {
  font-size: 0.82rem;
  color: var(--grey-400);
  margin-bottom: 28px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--grey-700);
  padding: 8px 0;
}

.pricing-features li::before {
  content: '✓';
  font-weight: 700;
  color: var(--accent);
  font-size: 0.9rem;
}

.pricing-btn {
  width: 100%;
  padding: 14px 24px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 600;
  border: 2px solid var(--primary);
  background: transparent;
  color: var(--primary);
  cursor: pointer;
  transition: all var(--transition-base);
}

.pricing-btn:hover {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.pricing-card.featured .pricing-btn {
  background: var(--gradient-primary);
  border-color: transparent;
  color: var(--white);
}

.pricing-card.featured .pricing-btn:hover {
  box-shadow: 0 8px 24px var(--primary-glow);
  transform: translateY(-2px);
}

/* ============================================
   CHECKOUT MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 22, 41, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(24px) scale(0.96);
  transition: transform var(--transition-base);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.25);
}

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

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 32px 0;
}

.modal-header h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--grey-900);
}

.modal-close {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--grey-50);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--grey-600);
  transition: all var(--transition-base);
}

.modal-close:hover {
  background: var(--grey-200);
  color: var(--grey-900);
}

.modal-body {
  padding: 24px 32px 32px;
}

/* Order summary */
.order-summary {
  background: var(--grey-50);
  border-radius: var(--border-radius-sm);
  padding: 20px;
  margin-bottom: 28px;
}

.order-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--grey-700);
}

.order-row.total {
  border-top: 1px solid var(--grey-200);
  margin-top: 8px;
  padding-top: 16px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--grey-900);
}

/* Payment methods */
.payment-methods {
  margin-bottom: 28px;
}

.payment-methods label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--grey-800);
  display: block;
  margin-bottom: 12px;
}

.payment-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.payment-option {
  border: 2px solid var(--grey-200);
  border-radius: var(--border-radius-sm);
  padding: 14px 8px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background: var(--white);
}

.payment-option.selected {
  border-color: var(--primary);
  background: rgba(10, 102, 194, 0.04);
}

.payment-option:hover {
  border-color: var(--primary-light);
}

.payment-option-icon {
  font-size: 1.4rem;
  margin-bottom: 6px;
}

.payment-option-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--grey-700);
}

/* Payment form */
.payment-form {
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--grey-800);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--grey-200);
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  font-family: var(--font-primary);
  color: var(--grey-900);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  background: var(--white);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10, 102, 194, 0.1);
}

.form-input::placeholder {
  color: var(--grey-400);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.checkout-btn {
  width: 100%;
  padding: 16px;
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.checkout-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--primary-glow);
}

.checkout-secure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--grey-400);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
  padding: 120px 0;
  background: var(--grey-50);
}

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

.contact-info h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--grey-900);
  margin-bottom: 16px;
  line-height: 1.3;
}

.contact-info > p {
  font-size: 0.95rem;
  color: var(--grey-600);
  margin-bottom: 36px;
  line-height: 1.8;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: rgba(10, 102, 194, 0.08);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.contact-item-text h4 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--grey-400);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.contact-item-text p {
  font-size: 0.92rem;
  color: var(--grey-800);
  font-weight: 500;
}

/* Contact form */
.contact-form-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 40px;
  border: 1px solid var(--grey-100);
  box-shadow: var(--shadow-sm);
}

.contact-form-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--grey-900);
  margin-bottom: 24px;
}

.contact-form .form-input {
  background: var(--grey-50);
  border-color: var(--grey-100);
}

.contact-form .form-input:focus {
  background: var(--white);
}

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

.submit-btn {
  width: 100%;
  padding: 14px 28px;
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--primary-glow);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--dark);
  color: var(--grey-400);
  padding: 56px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin-bottom: 28px;
  gap: 40px;
}

.footer-brand {
  max-width: 360px;
}

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

.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--grey-600);
}

.footer-links {
  display: flex;
  gap: 56px;
}

.footer-links h4 {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--grey-300);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  font-size: 0.88rem;
  color: var(--grey-600);
  transition: color var(--transition-base);
}

.footer-links ul li a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.8rem;
}

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

.footer-legal span {
  font-size: 0.8rem;
  color: var(--grey-600);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .services-grid {
    gap: 24px;
  }

  .pricing-grid {
    gap: 20px;
  }

  .contact-wrapper {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  /* Navigation */
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    padding: 40px;
    gap: 24px;
    transition: right var(--transition-base);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.1);
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    font-size: 1.05rem;
    color: var(--grey-800) !important;
  }

  .nav-links a:hover {
    color: var(--primary) !important;
  }

  /* Hero */
  .hero-content {
    padding: 100px 0 60px;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 28px;
  }

  /* About */
  .about {
    padding: 80px 0;
  }

  /* Services */
  .services {
    padding: 80px 0;
  }

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

  .service-card {
    padding: 32px;
  }

  /* Pricing */
  .pricing {
    padding: 80px 0;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .pricing-card.featured {
    transform: none;
    order: -1;
  }

  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }

  .payment-options {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact {
    padding: 80px 0;
  }

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

  .contact-form-card {
    padding: 28px;
  }

  /* Footer */
  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 32px;
  }

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

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

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-stats {
    gap: 20px;
  }

  .hero-stat h3 {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .pricing-card {
    padding: 32px 24px;
  }

  .modal {
    border-radius: var(--border-radius);
  }

  .modal-body {
    padding: 20px 24px 28px;
  }

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

/* ---------- Toast notification ---------- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--dark);
  color: var(--white);
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 3000;
  opacity: 0;
  transition: all 0.4s var(--ease-out);
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success {
  background: linear-gradient(135deg, #00A885, #00D4AA);
}