/* ==========================================
   Chenor Micro — Corporate Website
   Navy + Gold, Business & Tech Style
   ========================================== */

/* ── RESET & BASE ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --navy: #0a1f3d;
  --navy-light: #1B3F6B;
  --navy-mid: #152d52;
  --gold: #C8A951;
  --gold-light: #DFC26B;
  --gold-dark: #A8882E;
  --white: #ffffff;
  --off-white: #f8f7f4;
  --gray-50: #f5f6f8;
  --gray-100: #e8eaed;
  --gray-200: #d1d5db;
  --gray-400: #9ca3af;
  --gray-600: #6b7280;
  --gray-800: #1f2937;
  --navy-dark: #060f20;
  --section-padding: 100px 0;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── TYPOGRAPHY ── */
.section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(200, 169, 81, 0.1);
  padding: 6px 18px;
  border-radius: 20px;
  margin-bottom: 16px;
  border: 1px solid rgba(200, 169, 81, 0.2);
}

.section-title {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--gray-600);
  max-width: 520px;
  margin: 0 auto;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--navy-dark);
  border-color: var(--gold);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(200, 169, 81, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.5);
}

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

.btn-full { width: 100%; }

/* ── NAVIGATION ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 31, 61, 0.97);
  backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 2px 30px rgba(0, 0, 0, 0.15);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo-img {
  height: 40px;
  width: auto;
  border-radius: 4px;
}

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

.logo-cn {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 0.1em;
}

.logo-en {
  font-size: 0.6rem;
  font-weight: 500;
  color: var(--gold);
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

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

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--gold);
}

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

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

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.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;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 50%, var(--navy-light) 100%);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 10% 80%, rgba(200, 169, 81, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 500px 500px at 80% 20%, rgba(200, 169, 81, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 40px;
  width: 100%;
}

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

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gold);
  background: rgba(200, 169, 81, 0.12);
  border: 1px solid rgba(200, 169, 81, 0.25);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 4rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

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

.hero-desc {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  max-width: 480px;
  margin-bottom: 36px;
}

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

/* Hero visual - chip graphic */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 2;
}

.chip-graphic {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1;
  position: relative;
}

.chip-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 60px rgba(200, 169, 81, 0.15));
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  animation: bounce-down 2s ease-in-out infinite;
}

.scroll-arrow {
  font-size: 1.2rem;
}

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

/* ── ABOUT ── */
.about {
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 60px;
  align-items: center;
}

.about-image-placeholder {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  border-radius: 16px;
  aspect-ratio: 4/3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border: 1px solid rgba(200, 169, 81, 0.15);
  box-shadow: 0 20px 60px rgba(10, 31, 61, 0.15);
}

.about-image-placeholder p {
  color: var(--gold);
  font-weight: 500;
  font-size: 0.9rem;
  opacity: 0.8;
}

.about-text h3 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
}

.about-desc {
  font-size: 1rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--gray-100);
}

.stat-item {
  position: relative;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}

.stat-plus {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
  margin-left: 2px;
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--gray-400);
  margin-top: 4px;
}

/* ── PRODUCTS ── */
.products {
  background: var(--gray-50);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.product-card {
  background: var(--white);
  border-radius: 16px;
  padding: 36px 28px;
  transition: all var(--transition);
  border: 1px solid var(--gray-100);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--gold), var(--gold-dark));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(10, 31, 61, 0.1);
  border-color: rgba(200, 169, 81, 0.2);
}

.product-card:hover::before {
  transform: scaleY(1);
}

.product-icon {
  margin-bottom: 20px;
}

.product-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 20px;
}

.product-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.product-features li {
  font-size: 0.85rem;
  color: var(--gray-600);
  padding-left: 18px;
  position: relative;
}

.product-features li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: 700;
}

/* ── ADVANTAGES ── */
.advantages {
  background: var(--white);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.advantage-card {
  display: flex;
  gap: 24px;
  padding: 32px;
  background: var(--gray-50);
  border-radius: 16px;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.advantage-card:hover {
  border-color: rgba(200, 169, 81, 0.2);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(10, 31, 61, 0.08);
}

.advantage-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--gold);
  opacity: 0.5;
  line-height: 1;
  flex-shrink: 0;
  font-family: 'Inter', monospace;
}

.advantage-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.advantage-content p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ── CONTACT ── */
.contact {
  background: var(--gray-50);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

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

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--gray-100);
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(200, 169, 81, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-400);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-item p {
  font-size: 0.95rem;
  color: var(--navy);
  font-weight: 500;
}

.contact-cta {
  padding: 24px;
  background: linear-gradient(135deg, var(--navy), var(--navy-light));
  border-radius: 12px;
  text-align: center;
}

.contact-cta p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.contact-cta .btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
}

/* Contact form */
.contact-form {
  background: var(--white);
  border-radius: 16px;
  padding: 36px;
  border: 1px solid var(--gray-100);
  box-shadow: 0 10px 40px rgba(10, 31, 61, 0.06);
}

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

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

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--gray-100);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--gray-800);
  transition: all var(--transition);
  background: var(--gray-50);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(200, 169, 81, 0.12);
  background: var(--white);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-400);
}

.submit-success {
  text-align: center;
  padding: 24px;
  color: var(--navy);
  font-weight: 500;
}

/* ── FOOTER ── */
.footer {
  background: var(--navy-dark);
  padding: 48px 0 28px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo-img {
  height: 36px;
  width: auto;
  border-radius: 4px;
}

.footer-brand-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

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

.footer-links a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition);
}

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

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

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.35);
}

.footer-icp {
  font-size: 0.75rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .hero-title { font-size: 3.2rem; }
  .about-grid { gap: 40px; }
  .advantages-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .mobile-break { display: block; }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--navy);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 40px;
    gap: 24px;
    transition: right 0.4s ease;
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.2);
  }

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

  .nav-toggle { display: flex; }

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

  .hero-title { font-size: 2.6rem; }
  .hero-desc { margin: 0 auto 36px; }
  .hero-actions { justify-content: center; }
  .hero-visual { display: none; }

  .section { padding: 70px 0; }
  .section-title { font-size: 1.8rem; }

  .about-grid { grid-template-columns: 1fr; }
  .about-stats { gap: 24px; }
  .stat-number { font-size: 2rem; }

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

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

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

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

  .footer-content { flex-direction: column; gap: 20px; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
  .about-stats { flex-direction: column; gap: 16px; }
  .contact-form { padding: 24px; }
}

/* ── ANIMATIONS ── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Loading overlay for form submit */
.form-loading {
  opacity: 0.6;
  pointer-events: none;
}