/* === FangRen — Main Stylesheet === */
/* Color Scheme: Deep Charcoal-Violet + Coral Vermilion + Teal-Mint + Warm Gold */
/* Base: #1C1B1F | Accent: #E04D3C | Secondary: #5AA897 | Gold: #DCB86C | Light: #EDEAE5 */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary: #1C1B1F;
  --bg-secondary: #25242A;
  --bg-tertiary: #2E2D34;
  --bg-card: #25242A;
  --bg-darker: #151418;
  --accent: #E04D3C;
  --accent-hover: #C74030;
  --accent-teal: #5AA897;
  --accent-teal-dark: #468A7B;
  --accent-gold: #DCB86C;
  --text-primary: #EDEAE5;
  --text-secondary: #B5B2AC;
  --text-muted: #8A8782;
  --border-color: #33313A;
  --border-light: #3E3C45;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* === Navigation === */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(21, 20, 24, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition);
}

.main-nav.scrolled { background: rgba(21, 20, 24, 0.98); }

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav-brand {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav-brand:hover { color: var(--accent); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

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

.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

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

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

.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); }

/* === Home Hero === */
.home-hero {
  padding: 140px 0 100px;
  overflow: hidden;
}

.home-hero-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

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

.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-teal);
  background: rgba(90, 168, 151, 0.1);
  border: 1px solid rgba(90, 168, 151, 0.25);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
  color: var(--text-primary);
}

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

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 520px;
  line-height: 1.8;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(224, 77, 60, 0.25); }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-light);
}

.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(224, 77, 60, 0.06); }

.btn-full { width: 100%; }

/* Hero Visual */
.home-hero-visual {
  position: relative;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-dot-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--border-color) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-card {
  position: absolute;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  backdrop-filter: blur(8px);
}

.hero-card-1 { top: 10%; right: 5%; }
.hero-card-2 { bottom: 15%; right: 15%; }
.hero-card-3 { top: 30%; left: 0; }

.hero-card-icon {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--accent);
  margin-bottom: 6px;
}

.hero-card-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  line-height: 1.4;
  margin-bottom: 8px;
}

.hero-card-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* === Section Headers === */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-accent { color: var(--accent); }

.section-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.75;
}

/* === Home Showcase (Bento Grid) === */
.home-showcase { padding: 100px 0; }

.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(200px, auto);
  gap: 20px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color var(--transition), transform var(--transition);
}

.bento-card:hover { border-color: var(--border-light); transform: translateY(-3px); }

.bento-large { grid-column: span 2; grid-row: span 2; }

.bento-tall { grid-row: span 2; }

.bento-wide { grid-column: span 2; }

.bento-icon {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-teal);
  margin-bottom: 16px;
}

.bento-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.bento-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === Home Services === */
.home-services { padding: 100px 0; background: var(--bg-darker); }

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

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: border-color var(--transition), transform var(--transition);
}

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

.service-icon-wrap {
  width: 52px;
  height: 52px;
  background: rgba(224, 77, 60, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.service-symbol {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.service-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === Home Process === */
.home-process { padding: 100px 0; }

.process-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.process-timeline::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-teal), var(--accent-gold), var(--accent));
  z-index: 0;
}

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

.process-marker {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
}

.process-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.process-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === Home Domains === */
.home-domains { padding: 100px 0; background: var(--bg-darker); }

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

.domain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color var(--transition), transform var(--transition);
}

.domain-card:hover { border-color: var(--accent-teal); transform: translateY(-3px); }

.domain-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
  position: relative;
  padding-left: 16px;
}

.domain-card h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: var(--accent-teal);
  border-radius: 3px;
}

.domain-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === Home Difference (Alternating Rows) === */
.home-difference { padding: 100px 0; }

.diff-rows { display: flex; flex-direction: column; gap: 40px; }

.diff-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.diff-row-alt .diff-text { order: 2; }
.diff-row-alt .diff-visual { order: 1; }

.diff-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-gold);
  display: block;
  margin-bottom: 12px;
}

.diff-text h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.diff-text p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

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

.diff-block {
  width: 100%;
  height: 240px;
  border-radius: var(--radius-lg);
}

.diff-block-1 { background: linear-gradient(135deg, rgba(224,77,60,0.2), rgba(224,77,60,0.05)); border: 1px solid rgba(224,77,60,0.15); }
.diff-block-2 { background: linear-gradient(135deg, rgba(90,168,151,0.2), rgba(90,168,151,0.05)); border: 1px solid rgba(90,168,151,0.15); }
.diff-block-3 { background: linear-gradient(135deg, rgba(220,184,108,0.2), rgba(220,184,108,0.05)); border: 1px solid rgba(220,184,108,0.15); }

/* === Home Contact === */
.home-contact { padding: 100px 0; background: var(--bg-darker); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.contact-info > p {
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.75;
}

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

.contact-item { display: flex; flex-direction: column; gap: 4px; }

.contact-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-item a, .contact-item span:last-child {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 1rem;
  transition: color var(--transition);
}

.contact-item a:hover { color: var(--accent); }

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

.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(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

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

.form-note {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--accent-teal);
  min-height: 20px;
}

/* === Site Footer === */
.site-footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 0;
}

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

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

.footer-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

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

.footer-links h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.footer-links ul { list-style: none; }

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

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  text-align: center;
}

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

/* === Scroll Reveal === */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* === Responsive === */
@media (max-width: 1024px) {
  .home-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .home-hero-visual { height: 300px; }
  .hero-title { font-size: 2.5rem; }
  .bento-grid { grid-template-columns: repeat(2, 1fr); }
  .bento-large { grid-column: span 2; grid-row: span 1; }
  .bento-tall { grid-row: span 1; }
  .bento-wide { grid-column: span 2; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .process-timeline { grid-template-columns: repeat(2, 1fr); }
  .process-timeline::before { display: none; }
  .domains-grid { grid-template-columns: repeat(2, 1fr); }
  .diff-row { grid-template-columns: 1fr; gap: 24px; }
  .diff-row-alt .diff-text { order: 1; }
  .diff-row-alt .diff-visual { order: 0; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-darker);
    flex-direction: column;
    padding: 100px 32px 40px;
    gap: 24px;
    transition: right 0.4s ease;
    border-left: 1px solid var(--border-color);
    z-index: 999;
  }

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

  .nav-toggle { display: flex; }

  .hero-title { font-size: 2rem; }
  .hero-desc { font-size: 1rem; }

  .bento-grid { grid-template-columns: 1fr; }
  .bento-large, .bento-wide { grid-column: span 1; }

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

  .process-timeline { grid-template-columns: 1fr; }

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

  .section-title { font-size: 1.8rem; }

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

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

  .home-hero { padding: 100px 0 60px; }

  .hero-card { display: none; }
  .hero-dot-grid { display: none; }
}