/* ===== CSS Variables ===== */
:root {
  --primary: #00f5ff;
  --secondary: #ff00ea;
  --accent: #faff00;
  --bg-dark: #0a0a0f;
  --bg-card: rgba(15, 15, 25, 0.85);
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --gradient-cyber: linear-gradient(135deg, #00f5ff 0%, #ff00ea 50%, #faff00 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #15152a 100%);
  --glow-cyan: 0 0 20px rgba(0, 245, 255, 0.5), 0 0 40px rgba(0, 245, 255, 0.3);
  --glow-pink: 0 0 20px rgba(255, 0, 234, 0.5), 0 0 40px rgba(255, 0, 234, 0.3);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Rajdhani', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ===== Animated Background ===== */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 150vmax;
  height: 150vmax;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, 
    rgba(0, 245, 255, 0.08) 0%, 
    rgba(255, 0, 234, 0.05) 30%, 
    transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: pulse-glow 8s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

/* ===== Language Toggle ===== */
.lang-toggle {
  position: fixed;
  top: 2rem;
  left: 2rem;
  z-index: 1000;
  display: flex;
  gap: 0.5rem;
  background: var(--bg-card);
  padding: 0.5rem;
  border-radius: 2rem;
  border: 1px solid rgba(0, 245, 255, 0.2);
  backdrop-filter: blur(10px);
}

.lang-btn {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 1.5rem;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.lang-btn:hover {
  color: var(--primary);
}

.lang-btn.active {
  background: var(--gradient-cyber);
  color: var(--bg-dark);
  box-shadow: var(--glow-cyan);
}

/* ===== Social Links ===== */
.social-links {
  position: fixed;
  top: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  gap: 1rem;
}

.social-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid rgba(0, 245, 255, 0.2);
  border-radius: 50%;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.social-icon svg {
  width: 22px;
  height: 22px;
}

.social-icon:hover {
  color: var(--primary);
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
  transform: translateY(-3px);
}

.social-icon-badge {
  position: relative;
}

.social-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  background: linear-gradient(135deg, #ff2442, #ff4466);
  color: white;
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 700;
  padding: 2px 5px;
  border-radius: 8px;
  white-space: nowrap;
  box-shadow: 0 2px 6px rgba(255, 36, 66, 0.4);
}

.social-rednote {
  border: none;
  background: transparent;
  width: auto;
  height: auto;
  padding: 0;
}

.social-rednote img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 10px;
}

.social-rednote:hover {
  border: none;
  box-shadow: 0 0 20px rgba(255, 36, 66, 0.5), 0 0 40px rgba(255, 36, 66, 0.3);
  transform: translateY(-3px);
}

/* ===== Main Container ===== */
.container {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  min-height: 100vh;
}

/* ===== Hero Section ===== */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 50vh;
  padding: 4rem 0;
  gap: 2rem;
}

.hero-content {
  flex: 1;
}

/* Glitch Effect */
.glitch-wrapper {
  position: relative;
}

.glitch {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 900;
  text-transform: uppercase;
  background: var(--gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  letter-spacing: 0.1em;
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glitch::before {
  animation: glitch-1 2s infinite linear alternate-reverse;
  clip-path: polygon(0 0, 100% 0, 100% 45%, 0 45%);
}

.glitch::after {
  animation: glitch-2 3s infinite linear alternate-reverse;
  clip-path: polygon(0 60%, 100% 60%, 100% 100%, 0 100%);
}

@keyframes glitch-1 {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-3px); }
  40% { transform: translateX(3px); }
  60% { transform: translateX(-2px); }
  80% { transform: translateX(2px); }
}

@keyframes glitch-2 {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(3px); }
  40% { transform: translateX(-3px); }
  60% { transform: translateX(2px); }
  80% { transform: translateX(-2px); }
}

/* Avatar */
.avatar-wrapper {
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: 1.5rem;
}

.avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid transparent;
  background: linear-gradient(var(--bg-dark), var(--bg-dark)) padding-box,
              var(--gradient-cyber) border-box;
  position: relative;
  z-index: 1;
}

.avatar-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: var(--gradient-cyber);
  opacity: 0.5;
  filter: blur(10px);
  animation: avatar-glow 3s ease-in-out infinite;
}

@keyframes avatar-glow {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.05); }
}

/* Language-specific display */
.lang-zh {
  display: none;
}

.lang-en {
  display: block;
}

.glitch.lang-zh {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', var(--font-display);
  letter-spacing: 0.2em;
}

.tagline {
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 1rem;
  letter-spacing: 0.15em;
}

.bio {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  opacity: 0.8;
  letter-spacing: 0.05em;
}

/* Credentials */
.credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.credential {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  background: rgba(0, 245, 255, 0.1);
  border: 1px solid rgba(0, 245, 255, 0.2);
  border-radius: 2rem;
  transition: all 0.3s ease;
}

.credential:hover {
  border-color: var(--primary);
  box-shadow: var(--glow-cyan);
}

.credential-logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 6px;
  background: white;
  padding: 3px;
}

/* 3D Cube */
.hero-3d {
  flex: 0 0 auto;
  perspective: 1000px;
}

.cube {
  width: 150px;
  height: 150px;
  position: relative;
  transform-style: preserve-3d;
  animation: rotate-cube 15s infinite linear;
}

.face {
  position: absolute;
  width: 150px;
  height: 150px;
  border: 2px solid var(--primary);
  background: rgba(0, 245, 255, 0.05);
  backdrop-filter: blur(5px);
}

.front { transform: rotateY(0deg) translateZ(75px); }
.back { transform: rotateY(180deg) translateZ(75px); }
.right { transform: rotateY(90deg) translateZ(75px); }
.left { transform: rotateY(-90deg) translateZ(75px); }
.top { transform: rotateX(90deg) translateZ(75px); }
.bottom { transform: rotateX(-90deg) translateZ(75px); }

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

/* ===== Cards Grid ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

/* ===== Card Base ===== */
.card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 245, 255, 0.15);
  border-radius: 1.5rem;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
  transition: all 0.4s ease;
  transform-style: preserve-3d;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-cyber);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  border-color: var(--primary);
  transform: translateY(-5px);
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 30px rgba(0, 245, 255, 0.15);
}

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

.card-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 245, 255, 0.15), rgba(255, 0, 234, 0.15));
  border-radius: 1rem;
  margin-bottom: 1.5rem;
}

.card-icon svg {
  width: 30px;
  height: 30px;
  color: var(--primary);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Hackathon Card ===== */
.card-hackathon {
  grid-row: span 2;
}

.prize-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: linear-gradient(135deg, #ff00ea, #faff00);
  padding: 0.75rem 1.25rem;
  border-radius: 1rem;
  text-align: center;
  box-shadow: var(--glow-pink);
  animation: badge-pulse 2s infinite;
}

@keyframes badge-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(255, 0, 234, 0.5); }
  50% { box-shadow: 0 0 40px rgba(255, 0, 234, 0.8), 0 0 60px rgba(250, 255, 0, 0.4); }
}

.prize-amount {
  display: block;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--bg-dark);
}

.prize-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--bg-dark);
  opacity: 0.8;
}

.hackathon-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 720px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.hackathon-list::-webkit-scrollbar {
  width: 4px;
}

.hackathon-list::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 2px;
}

.hackathon-list::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 2px;
}

.hackathon-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: rgba(0, 245, 255, 0.03);
  border: 1px solid rgba(0, 245, 255, 0.1);
  border-radius: 0.75rem;
  text-decoration: none;
  transition: all 0.3s ease;
}

.hackathon-item:hover {
  background: rgba(0, 245, 255, 0.08);
  border-color: var(--primary);
  transform: translateX(5px);
}

.hackathon-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.6rem;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.hackathon-icon.logo-white {
  background: white;
}

.hackathon-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 4px;
}

.hackathon-icon svg {
  width: 22px;
  height: 22px;
  color: white;
}

.logo-text-small {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 900;
  color: white;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #ff6b35, #f7931e);
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hackathon-info {
  flex: 1;
  min-width: 0;
}

.hackathon-name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.hackathon-project {
  font-size: 0.85rem;
  color: var(--primary);
  margin-bottom: 0.25rem;
}

.hackathon-prize {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}

/* ===== Media Card ===== */
.media-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.media-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: rgba(0, 245, 255, 0.03);
  border: 1px solid rgba(0, 245, 255, 0.1);
  border-radius: 0.75rem;
  text-decoration: none;
  transition: all 0.3s ease;
}

.media-item:hover {
  background: rgba(0, 245, 255, 0.08);
  border-color: var(--primary);
}

.media-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.75rem;
  flex-shrink: 0;
}

.media-icon.cctv {
  background: linear-gradient(135deg, #cc0000, #ff3333);
}

.media-icon.worldjournal {
  background: linear-gradient(135deg, #1a365d, #2d5a8a);
}

.media-icon.youtube {
  background: linear-gradient(135deg, #ff0000, #cc0000);
}

.media-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

/* Logo Text Styles */
.logo-text {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 900;
  color: white;
  letter-spacing: 0.05em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.logo-text-cn {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  color: white;
  line-height: 1.2;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.media-video {
  background: rgba(255, 0, 0, 0.05);
  border-color: rgba(255, 0, 0, 0.2);
}

.media-video:hover {
  background: rgba(255, 0, 0, 0.1);
  border-color: #ff0000;
}

.media-logo-img {
  background: white;
  padding: 0;
  overflow: hidden;
}

.media-logo-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 6px;
}

/* ===== Companies Card ===== */
.company-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.company-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: rgba(0, 245, 255, 0.03);
  border: 1px solid rgba(0, 245, 255, 0.1);
  border-radius: 0.75rem;
  transition: all 0.3s ease;
}

.company-item:hover {
  background: rgba(0, 245, 255, 0.08);
  border-color: var(--primary);
  transform: translateX(5px);
}

.company-logo {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 0.75rem;
  flex-shrink: 0;
  overflow: hidden;
}

.company-logo.logo-white {
  background: white;
}

.company-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 6px;
}

.company-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.company-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.company-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Product Badge */
.product-badge {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: linear-gradient(135deg, #00f5ff, #00c8ff);
  color: var(--bg-dark);
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 10px;
  white-space: nowrap;
}

.company-item {
  position: relative;
}

.media-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.media-source {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.media-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== About Card ===== */
.about-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* ===== Video Card ===== */
.video-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.video-thumbnail {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
  margin-bottom: 1rem;
}

.video-thumbnail img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.video-link:hover .video-thumbnail img {
  transform: scale(1.05);
}

.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.video-link:hover .play-overlay {
  opacity: 1;
}

.play-overlay svg {
  width: 60px;
  height: 60px;
  color: white;
  filter: drop-shadow(0 0 10px rgba(0, 245, 255, 0.8));
}

.video-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ===== Floating Particles ===== */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0.6;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(-100vh) rotate(720deg);
    opacity: 0;
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero {
    flex-direction: column;
    text-align: center;
  }

  .avatar-wrapper {
    margin: 0 auto 1.5rem;
  }

  .credentials {
    justify-content: center;
  }

  .hero-3d {
    order: -1;
    display: none;
  }

  .cube {
    width: 100px;
    height: 100px;
  }

  .face {
    width: 100px;
    height: 100px;
  }

  .front { transform: rotateY(0deg) translateZ(50px); }
  .back { transform: rotateY(180deg) translateZ(50px); }
  .right { transform: rotateY(90deg) translateZ(50px); }
  .left { transform: rotateY(-90deg) translateZ(50px); }
  .top { transform: rotateX(90deg) translateZ(50px); }
  .bottom { transform: rotateX(-90deg) translateZ(50px); }

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

  .card-hackathon {
    grid-row: auto;
  }

  .lang-toggle {
    top: 1rem;
    left: 1rem;
  }

  .social-links {
    top: 1rem;
    right: 1rem;
  }

  .social-icon {
    width: 40px;
    height: 40px;
  }

  .prize-badge {
    position: relative;
    top: auto;
    right: auto;
    display: inline-block;
    margin-bottom: 1rem;
  }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--primary), var(--secondary));
  border-radius: 4px;
}

/* ===== Selection ===== */
::selection {
  background: var(--primary);
  color: var(--bg-dark);
}