/* ============================================================
   弗莱软件 - Corporate Site
   Design: Cyber / Tech-forward dark theme
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --bg-deep: #06060f;
  --bg-primary: #0a0a1a;
  --bg-secondary: #0f1023;
  --bg-card: rgba(15, 16, 40, 0.6);
  --border: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(0, 212, 255, 0.15);
  --text-primary: #e8eaf0;
  --text-secondary: #9095a8;
  --text-muted: #5a5f78;
  --accent-cyan: #00d4ff;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --gradient-1: linear-gradient(135deg, #00d4ff, #3b82f6);
  --gradient-2: linear-gradient(135deg, #8b5cf6, #ec4899);
  --gradient-3: linear-gradient(135deg, #00d4ff, #8b5cf6);
  --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.3), 0 0 60px rgba(0, 212, 255, 0.1);
  --glow-purple: 0 0 20px rgba(139, 92, 246, 0.3), 0 0 60px rgba(139, 92, 246, 0.1);
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'JetBrains Mono', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-cyan) var(--bg-deep);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--accent-cyan); border-radius: 3px; }

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

/* --- Utility --- */
.gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  padding: 4px 12px;
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(6, 6, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

.nav-container {
  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: 2px;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-bracket { color: var(--accent-cyan); }
.logo-text { letter-spacing: 2px; }

.logo-cursor {
  display: inline-block;
  width: 8px;
  height: 18px;
  background: var(--accent-cyan);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

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

.nav-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-cyan);
  transition: var(--transition);
}

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

.nav-cta {
  padding: 8px 20px;
  border: 1px solid var(--accent-cyan);
  border-radius: 6px;
  color: var(--accent-cyan) !important;
  font-weight: 500;
}

.nav-cta:hover {
  background: rgba(0, 212, 255, 0.1);
  box-shadow: var(--glow-cyan);
}

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

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

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 30px;
  margin-bottom: 32px;
  background: rgba(255,255,255,0.02);
  backdrop-filter: blur(10px);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  50% { box-shadow: 0 0 20px var(--accent-cyan); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.title-line { display: block; }

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.hero-subtitle .highlight {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-1);
  color: #fff;
  font-weight: 600;
  border-radius: 8px;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--text-primary);
  font-weight: 500;
  border-radius: 8px;
  font-size: 1rem;
  transition: var(--transition);
}

.btn-outline:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 212, 255, 0.05);
}

.btn-large {
  padding: 18px 36px;
  font-size: 1.1rem;
}

.btn-icon { font-size: 1.1em; }

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-plus {
  font-size: 1.5rem;
  color: var(--accent-cyan);
  font-weight: 700;
}

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

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* Hero Scroll Indicator */
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.hero-scroll span {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.scroll-mouse {
  width: 22px;
  height: 34px;
  border: 2px solid var(--text-muted);
  border-radius: 11px;
  position: relative;
}

.scroll-wheel {
  width: 4px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 2s ease-in-out infinite;
}

@keyframes scroll-wheel {
  0% { opacity: 1; top: 6px; }
  100% { opacity: 0; top: 20px; }
}

/* --- Services --- */
.services {
  padding: 100px 0;
  background: var(--bg-primary);
  position: relative;
}

.services::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

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

.service-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  transition: var(--transition);
  overflow: hidden;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.service-card.featured {
  border-color: rgba(0, 212, 255, 0.25);
  background: rgba(0, 212, 255, 0.03);
}

.card-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(0, 212, 255, 0.08), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.service-card:hover .card-glow { opacity: 1; }

.card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.15);
  color: var(--accent-cyan);
  font-weight: 600;
}

.card-icon {
  width: 56px;
  height: 56px;
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.card-icon svg {
  width: 100%;
  height: 100%;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.card-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.card-features li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-left: 18px;
  position: relative;
}

.card-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
}

.card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.card-tech span {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* --- Tech Stack Marquee --- */
.tech-stack {
  padding: 100px 0;
  background: var(--bg-deep);
  overflow: hidden;
}

.tech-marquee {
  display: flex;
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.tech-track {
  display: flex;
  gap: 40px;
  animation: marquee 30s linear infinite;
  flex-shrink: 0;
  padding: 20px 0;
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.tech-item img {
  width: 40px;
  height: 40px;
  filter: grayscale(0.5);
  transition: var(--transition);
}

.tech-item:hover img {
  filter: grayscale(0);
  transform: scale(1.15);
}

.tech-item span {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-100%); }
}

.tech-marquee:hover .tech-track {
  animation-play-state: paused;
}

/* --- Process --- */
.process {
  padding: 100px 0;
  background: var(--bg-primary);
  position: relative;
}

.process-timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.process-line {
  position: absolute;
  left: 29px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-purple));
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.process-step {
  display: flex;
  gap: 28px;
  position: relative;
}

.step-number {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-cyan);
  position: relative;
  z-index: 1;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

.step-content {
  padding-top: 15px;
}

.step-content h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
}

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

/* --- Cases --- */
.cases {
  padding: 100px 0;
  background: var(--bg-deep);
}

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

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.case-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.case-image {
  aspect-ratio: 16/10;
  background: rgba(255,255,255,0.02);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
}

.case-placeholder {
  width: 120px;
  height: 80px;
  color: var(--text-muted);
  opacity: 0.6;
}

.case-placeholder svg {
  width: 100%;
  height: 100%;
}

.case-info {
  padding: 24px;
}

.case-tag {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  margin-bottom: 8px;
  display: inline-block;
}

.case-info h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.case-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Contact CTA --- */
.contact {
  padding: 100px 0;
  background: var(--bg-primary);
  position: relative;
}

.contact-card {
  position: relative;
  text-align: center;
  padding: 60px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  max-width: 700px;
  margin: 0 auto;
  overflow: hidden;
}

.contact-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.contact-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  margin: 16px 0;
}

.contact-desc {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 1.05rem;
  line-height: 1.7;
}

.contact-desc strong { color: var(--text-primary); }

.contact .btn-primary {
  font-family: var(--font-mono);
  font-size: 1.05rem;
}

.contact-note {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Footer --- */
.footer {
  padding: 60px 0 30px;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 12px;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links ul,
.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a,
.footer-links span,
.footer-contact a,
.footer-contact span {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-icp {
  color: var(--text-muted);
}

/* --- AOS (Animate on Scroll) --- */
[data-aos] {
  opacity: 0;
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-aos].aos-visible {
  opacity: 1;
  transform: none !important;
}

[data-aos="fade-up"] { transform: translateY(40px); }
[data-aos="fade-down"] { transform: translateY(-40px); }
[data-aos="fade-right"] { transform: translateX(-40px); }
[data-aos="fade-left"] { transform: translateX(40px); }
[data-aos="zoom-in"] { transform: scale(0.9); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .services-grid,
  .cases-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }

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

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    background: rgba(10, 10, 26, 0.98);
    backdrop-filter: blur(20px);
    padding: 80px 32px 32px;
    gap: 24px;
    transition: var(--transition);
    border-left: 1px solid var(--border);
  }

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

  .nav-toggle { display: flex; z-index: 1001; }

  .hero-stats { gap: 20px; }
  .stat-number { font-size: 2rem; }
  .stat-divider { display: none; }

  .hero-actions { flex-direction: column; align-items: center; }

  .process-line { left: 19px; }
  .step-number { width: 40px; height: 40px; font-size: 0.85rem; }
  .process-step { gap: 18px; }

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

  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}