/* ============================================
   Curabay - PRIME MERIDIAN AI HK LIMITED
   Official Company Website Styles
   ============================================ */

/* --- CSS Variables / Theme --- */
:root {
  --color-primary: #0a7e8c;
  --color-primary-dark: #065a65;
  --color-primary-light: #e0f2f5;
  --color-accent: #f4a261;
  --color-accent-dark: #e07c3c;
  --color-text: #2d3436;
  --color-text-light: #636e72;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafb;
  --color-bg-footer: #1a2a32;
  --color-white: #ffffff;
  --color-border: #e2e8f0;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
  --transition: all 0.3s ease;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --radius: 12px;
}

/* --- 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);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--color-primary-dark);
}

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

ul {
  list-style: none;
}

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
}

.section-title {
  font-size: 2.2rem;
  text-align: center;
  margin-bottom: 16px;
  color: var(--color-text);
}

.section-subtitle {
  font-size: 1.1rem;
  text-align: center;
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto 48px;
  line-height: 1.6;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-primary);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

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

.logo {
  display: flex;
  flex-direction: column;
}

.logo-brand {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.logo-sub {
  font-size: 0.65rem;
  color: var(--color-text-light);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

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

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding-bottom: 4px;
}

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

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

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.mobile-toggle span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #ffffff 50%, #f0f9fa 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(10, 126, 140, 0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 8px;
  color: var(--color-text);
}

.hero-content .brand-highlight {
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--color-primary);
  margin-bottom: 20px;
  display: block;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-icon-circle {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0a9ca8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 60px rgba(10, 126, 140, 0.3);
  position: relative;
}

.hero-icon-circle .icon-text {
  text-align: center;
  color: var(--color-white);
}

.hero-icon-circle .icon-text .big {
  font-size: 3.5rem;
  font-weight: 800;
  display: block;
  line-height: 1;
}

.hero-icon-circle .icon-text .small {
  font-size: 1rem;
  opacity: 0.9;
  margin-top: 8px;
  display: block;
}

/* --- Brand Story Section --- */
.brand-story {
  padding: 100px 0;
  background: var(--color-bg);
}

.brand-story .story-content {
  max-width: 850px;
  margin: 0 auto;
}

.brand-story .story-content p {
  font-size: 1.05rem;
  color: var(--color-text);
  margin-bottom: 20px;
  line-height: 1.8;
}

.brand-story .story-content .story-quote {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--color-primary);
  text-align: center;
  margin: 40px 0;
  padding: 24px 40px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
}

/* --- Mission Section --- */
.mission {
  padding: 100px 0;
  background: var(--color-bg-alt);
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.mission-card {
  background: var(--color-white);
  padding: 40px 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
  border: 1px solid var(--color-border);
}

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

.mission-card .icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
}

.mission-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.mission-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- Products Section --- */
.products {
  padding: 100px 0;
  background: var(--color-bg);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

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

.product-card .card-image {
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary-light), #d4f0f4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.product-card .card-body {
  padding: 28px 24px;
}

.product-card .card-body h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.product-card .card-body p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* --- App Download Section --- */
.app-download {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0a9ca8 50%, #0895a0 100%);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.app-download::before {
  content: '';
  position: absolute;
  top: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.app-download::after {
  content: '';
  position: absolute;
  bottom: -20%;
  right: -5%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.app-download-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.app-download-text h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: var(--color-white);
}

.app-download-text > p {
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.9);
}

.app-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.app-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.95);
}

.app-feature-item .check-icon {
  width: 24px;
  height: 24px;
  min-width: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-white);
}

.app-download-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.qr-wrapper {
  background: var(--color-white);
  padding: 24px;
  border-radius: 20px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  display: inline-block;
  transition: transform 0.3s ease;
}

.qr-wrapper:hover {
  transform: scale(1.03);
}

.qr-wrapper img {
  width: 240px;
  height: 240px;
  border-radius: 8px;
  display: block;
}

.qr-hint {
  margin-top: 16px;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

/* --- Global Presence Section --- */
.global {
  padding: 100px 0;
  background: var(--color-bg-alt);
}

.global-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.global-text h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.global-text p {
  color: var(--color-text-light);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.stat-card {
  background: var(--color-white);
  padding: 28px 24px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.stat-card .number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  display: block;
}

.stat-card .label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

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

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.contact-info p {
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.7;
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.contact-detail .icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

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

.contact-detail .detail-text span {
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.contact-detail .detail-text a {
  color: var(--color-primary);
  font-weight: 500;
}

.contact-form {
  background: var(--color-bg-alt);
  padding: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.contact-form h3 {
  font-size: 1.3rem;
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: var(--font-primary);
  transition: var(--transition);
  background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10, 126, 140, 0.1);
}

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

/* --- Compliance Section --- */
.compliance {
  padding: 80px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

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

.compliance-item {
  background: var(--color-white);
  padding: 28px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.compliance-item h4 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.compliance-item p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- Footer --- */
.footer {
  background: var(--color-bg-footer);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo-brand {
  color: var(--color-white);
  margin-bottom: 4px;
}

.footer-brand .logo-sub {
  color: rgba(255, 255, 255, 0.5);
}

.footer-brand p {
  font-size: 0.88rem;
  margin-top: 16px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.6);
}

.footer h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 16px;
}

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

.footer ul li a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.88rem;
}

.footer ul li a:hover {
  color: var(--color-white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

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

.footer-bottom-links a {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

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

/* --- Privacy Page Specific --- */
.privacy-page {
  padding: 120px 0 60px;
}

.privacy-page h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.privacy-page .last-updated {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 40px;
}

.privacy-page h2 {
  font-size: 1.4rem;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary-light);
}

.privacy-page h3 {
  font-size: 1.1rem;
  margin: 24px 0 12px;
}

.privacy-page p {
  margin-bottom: 16px;
  line-height: 1.7;
  color: var(--color-text);
}

.privacy-page ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
}

.privacy-page ul li {
  margin-bottom: 8px;
  line-height: 1.6;
  color: var(--color-text-light);
}

.privacy-page .highlight-box {
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 24px 0;
}

.privacy-page .highlight-box p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  border: none;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-icon-circle {
    width: 240px;
    height: 240px;
  }

  .hero-icon-circle .icon-text .big {
    font-size: 2.5rem;
  }

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

  .global-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

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

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

  .app-download-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .app-feature-item {
    justify-content: center;
  }

  .qr-wrapper img {
    width: 200px;
    height: 200px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links.open {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content .brand-highlight {
    font-size: 1.3rem;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .mission-grid,
  .products-grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .contact-form {
    padding: 24px;
  }

  .brand-story .story-content .story-quote {
    padding: 16px 20px;
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.7rem;
  }

  .hero-icon-circle {
    width: 180px;
    height: 180px;
  }

  .hero-icon-circle .icon-text .big {
    font-size: 2rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }
}