/* 渡鸦广告设计 - DuYa Advertising Design Company */
:root {
  --bg: #0a0a0f;
  --bg-alt: #111118;
  --surface: #1a1a25;
  --surface-hover: #222230;
  --border: #2a2a3a;
  --text: #e8e8f0;
  --text-secondary: #8888a0;
  --text-muted: #555570;
  --accent: #6c5ce7;
  --accent-hover: #7c6cf7;
  --accent-soft: rgba(108, 92, 231, 0.1);
  --accent-gradient: linear-gradient(135deg, #6c5ce7, #a855f7);
  --gradient-1: linear-gradient(135deg, #0f0f1a, #1a1a2e);
  --gradient-2: linear-gradient(135deg, #6c5ce7, #ec4899);
  --gradient-3: linear-gradient(135deg, #667eea, #764ba2);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ========== NAV ========== */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}
nav.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 10px 0;
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15em;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.nav-logo .logo-icon, .raven-logo-icon {
  width: 36px; height: 36px;
  background: var(--accent-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: var(--transition);
  border-radius: 2px;
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  background: var(--accent-gradient);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--text);
  font-size: 1.5rem;
}

/* ========== HERO ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 24px 80px;
  background: var(--bg);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(ellipse 600px 400px at 20% 30%, rgba(108, 92, 231, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 500px 500px at 80% 70%, rgba(168, 85, 247, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse 400px 300px at 50% 50%, rgba(236, 72, 153, 0.04) 0%, transparent 50%);
  pointer-events: none;
}
.hero-content {
  max-width: 900px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 16px;
  border-radius: 100px;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 24px;
  border: 1px solid rgba(108, 92, 231, 0.2);
}
.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.15;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #f0f0ff 0%, #a78bfa 50%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(108, 92, 231, 0.4);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
}
.btn-secondary:hover {
  background: var(--surface);
  border-color: var(--text-secondary);
  transform: translateY(-2px);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 48px;
  justify-content: center;
  margin-top: 56px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.5px;
}
.hero-stat .label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 3px;
}

/* ========== SECTIONS ========== */
.section {
  padding: 100px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-header h2 {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 14px;
  color: var(--text);
}
.section-header p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ========== SERVICES ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
}
.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  cursor: default;
}
.service-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}
.service-card .icon {
  width: 52px;
  height: 52px;
  background: var(--accent-soft);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}
.service-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.service-card .title-en {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.service-card p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.service-card .features {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.service-card .features span {
  font-size: 0.7rem;
  padding: 3px 10px;
  background: var(--bg-alt);
  border-radius: 100px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

/* ========== PORTFOLIO ========== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}
.portfolio-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.portfolio-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.portfolio-card .placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  background: var(--gradient-1);
}
.portfolio-card img {  width: 100%;  height: 100%;  object-fit: cover;  transition: transform 0.4s;}.portfolio-card:hover img {  transform: scale(1.05);}
.portfolio-card .overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
}
.portfolio-card .overlay h4 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.portfolio-card .overlay span {
  font-size: 0.75rem;
  color: var(--accent);
}

/* ========== ABOUT ========== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.about-text h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.about-text p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 16px;
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about-stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px;
  text-align: center;
}
.about-stat .num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}
.about-stat .label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ========== CONTACT ========== */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-info h3 {
  font-size: 1.1rem;
  margin-bottom: 20px;
}
.contact-info-item {
  display: flex;
  gap: 14px;
  margin-bottom: 16px;
  align-items: flex-start;
}
.contact-info-item .ci-icon {
  width: 40px; height: 40px;
  background: var(--accent-soft);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-info-item .ci-text strong {
  display: block;
  font-size: 0.875rem;
  margin-bottom: 2px;
}
.contact-info-item .ci-text span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-secondary);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.875rem;
  color: var(--text);
  transition: var(--transition);
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-group textarea {
  min-height: 120px;
  resize: vertical;
}
.form-group select {
  cursor: pointer;
}
.form-result {
  display: none;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 14px;
  font-size: 0.875rem;
}

/* ========== FOOTER ========== */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
}
footer p {
  color: var(--text-muted);
  font-size: 0.8125rem;
}

/* ========== ANIMATIONS ========== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.6s ease forwards;
}
.fade-in.d1 { animation-delay: 0.1s; }
.fade-in.d2 { animation-delay: 0.2s; }
.fade-in.d3 { animation-delay: 0.3s; }
.fade-in.d4 { animation-delay: 0.4s; }
.fade-in.d5 { animation-delay: 0.5s; }
@keyframes fadeIn {
  to { opacity: 1; transform: translateY(0); }
}

/* ========== RESPONSIVE ========== */

/* Raven Logo */
.logo-img {
  height: 32px;
  width: auto;
  vertical-align: middle;
  margin-right: 6px;
  transition: transform 0.3s ease;
  filter: drop-shadow(0 0 4px rgba(108,92,231,0.3));
}
.nav-logo:hover .logo-img {
  transform: scale(1.08) rotate(-5deg);
}
.logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  background: linear-gradient(135deg, #f0f0ff, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    flex-direction: column;
    gap: 16px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero-stats { gap: 24px; }
  .hero-stat .num { font-size: 1.2rem; }

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

  .about-content { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

/* Captcha */
.captcha-group { margin-top: 4px; }
.captcha-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.captcha-display {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #1e293b;
  color: #a78bfa;
  font-size: 1.2rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  padding: 10px 20px;
  border-radius: 8px;
  min-width: 100px;
  letter-spacing: 2px;
  user-select: none;
}
.captcha-input {
  width: 120px !important;
  text-align: center;
  font-size: 1.1rem !important;
  font-weight: 600;
}
.captcha-tip {
  font-size: 0.75rem;
  color: #64748b;
  margin-top: 6px;
}