/* ============================================
   创智清麟 - Chuangzhi Qinglin
   Corporate Homepage Styles
   ============================================ */

/* --- Custom Properties --- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a28;
  --bg-card: #151520;
  --bg-card-hover: #1c1c2e;

  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #6868808a;

  --accent-cyan: #00e5c8;
  --accent-cyan-dim: #00e5c830;
  --accent-amber: #f0a030;
  --accent-amber-dim: #f0a03025;
  --accent-blue: #4488ff;
  --accent-blue-dim: #4488ff20;

  --gradient-accent: linear-gradient(135deg, #00e5c8, #4488ff);
  --gradient-warm: linear-gradient(135deg, #f0a030, #ff6b6b);
  --gradient-hero: linear-gradient(180deg, #0a0a0f 0%, #0d1117 50%, #0a0a0f 100%);

  --font-heading: 'Sora', 'Noto Sans SC', -apple-system, sans-serif;
  --font-body: 'Instrument Sans', 'Noto Sans SC', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --border-subtle: #ffffff08;
  --border-accent: #00e5c840;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-glow-cyan: 0 0 40px #00e5c815;
  --shadow-glow-amber: 0 0 40px #f0a03015;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);

  --section-padding: clamp(80px, 12vh, 160px);
  --container-max: 1200px;
  --container-narrow: 900px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }

p {
  color: var(--text-secondary);
  max-width: 65ch;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(24px, 4vw, 48px);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent-cyan);
}

.section-title {
  margin-bottom: 1.5rem;
}

.section-desc {
  font-size: 1.1rem;
  margin-bottom: 3rem;
}

.accent-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all 0.4s ease;
}

.navbar.scrolled {
  background: #0a0a0fdd;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
}

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

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

.navbar-logo .logo-mark {
  width: 36px;
  height: 36px;
  background: var(--gradient-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.navbar-logo .logo-mark::after {
  content: '';
  position: absolute;
  inset: 2px;
  border: 1.5px solid var(--bg-primary);
  border-radius: 5px;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.navbar-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.3s;
  position: relative;
}

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

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--gradient-accent);
  transition: width 0.3s ease;
}

.navbar-links a:hover::after {
  width: 100%;
}

.navbar-cta {
  font-size: 0.85rem !important;
  padding: 8px 20px;
  border: 1px solid var(--accent-cyan);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan) !important;
  transition: all 0.3s !important;
}

.navbar-cta::after {
  display: none !important;
}

.navbar-cta:hover {
  background: var(--accent-cyan);
  color: var(--bg-primary) !important;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s;
  border-radius: 2px;
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero-canvas {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 0;
}

.hero-canvas canvas {
  width: 100%;
  height: 100%;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 800px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--border-accent);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
  background: var(--accent-cyan-dim);
  animation: fadeInUp 1s ease forwards;
  opacity: 0;
}

.hero-tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: pulse-dot 2s ease infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease 0.2s forwards;
  opacity: 0;
}

.hero h1 .line {
  display: block;
}

.hero h1 .line-accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  animation: fadeInUp 1s ease 0.4s forwards;
  opacity: 0;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 0.6s forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px var(--accent-cyan-dim);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px #00e5c830;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid #ffffff20;
}

.btn-secondary:hover {
  border-color: #ffffff40;
  background: #ffffff08;
  transform: translateY(-2px);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  animation: fadeInUp 1s ease 1s forwards;
  opacity: 0;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent-cyan), transparent);
  animation: scroll-line 2s ease infinite;
}

@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* --- About Section --- */
.about {
  background: var(--bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
  aspect-ratio: 1;
  max-width: 480px;
}

.about-visual .visual-ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--border-accent);
  border-radius: 50%;
  animation: rotate-slow 30s linear infinite;
}

.about-visual .visual-ring:nth-child(2) {
  top: 15%;
  right: 15%;
  bottom: 15%;
  left: 15%;
  border-color: var(--accent-amber-dim);
  animation-direction: reverse;
  animation-duration: 20s;
}

.about-visual .visual-ring:nth-child(3) {
  top: 30%;
  right: 30%;
  bottom: 30%;
  left: 30%;
  border-color: var(--accent-blue-dim);
  animation-duration: 25s;
}

.about-visual .visual-center {
  position: absolute;
  top: 35%;
  right: 35%;
  bottom: 35%;
  left: 35%;
  background: var(--gradient-accent);
  border-radius: 50%;
  opacity: 0.15;
  filter: blur(30px);
}

.about-visual .visual-core {
  position: absolute;
  top: 40%;
  right: 40%;
  bottom: 40%;
  left: 40%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-heading);
  color: var(--accent-cyan);
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.about-text h3 {
  margin-bottom: 1.5rem;
}

.about-text p {
  margin-bottom: 1rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.stat-item .stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* --- Services Section --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 40px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.4s;
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-cyan);
}

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

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
  position: relative;
}

.service-icon--ai {
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
}

.service-icon--data {
  background: var(--accent-amber-dim);
  color: var(--accent-amber);
}

.service-icon--hw {
  background: var(--accent-blue-dim);
  color: var(--accent-blue);
}

.service-icon--consult {
  background: #c084fc20;
  color: #c084fc;
}

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

.service-card p {
  font-size: 0.95rem;
  line-height: 1.7;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.service-tag {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  background: #ffffff06;
  border: 1px solid #ffffff10;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* --- Advantage Section --- */
.advantages {
  background: var(--bg-secondary);
}

.advantage-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.advantage-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border-subtle);
  align-items: start;
}

.advantage-item:first-child {
  border-top: 1px solid var(--border-subtle);
}

.advantage-num {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: #ffffff08;
  line-height: 1;
}

.advantage-content h3 {
  margin-bottom: 8px;
}

.advantage-content p {
  font-size: 0.95rem;
}

/* --- Partners / Tech Stack --- */
.tech-stack {
  text-align: center;
}

.tech-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 2rem;
}

.tech-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all 0.3s;
}

.tech-badge:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* --- CTA Section --- */
.cta {
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: var(--accent-cyan);
  opacity: 0.03;
  filter: blur(120px);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.cta .section-title {
  margin-bottom: 1rem;
}

.cta .section-desc {
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2rem;
}

.cta .btn-primary {
  font-size: 1rem;
  padding: 16px 36px;
}

/* --- Footer --- */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-primary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .navbar-logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-col h4 {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

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

.footer-col a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.3s;
}

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

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  .about-grid {
    gap: 48px;
  }

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

@media (max-width: 768px) {
  .navbar-links {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: var(--bg-primary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 1001;
    padding-top: 80px;
    overflow-y: auto;
  }

  .navbar-links.active {
    display: flex;
  }

  .navbar-links a {
    font-size: 1.2rem;
  }

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

  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero-content {
    text-align: center;
  }

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

  .hero-scroll-hint {
    display: none;
  }

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

  .about-visual {
    margin: 0 auto;
    max-width: 300px;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .advantage-item {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

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

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .service-card {
    padding: 28px;
  }
}