:root {
  --bg-primary: #0B0C10;
  --bg-secondary: #1F2833;
  --text-primary: #C5C6C7;
  --text-muted: #8e9499;
  --accent: #66FCF1;
  --accent-dim: #45A29E;
  --accent-glow: rgba(102, 252, 241, 0.3);
  --highlight: #FC5185;
  --highlight-glow: rgba(252, 81, 133, 0.4);
  --border: rgba(197, 198, 199, 0.1);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
  --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 准星光标画布 */
#crosshair-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

@media (pointer: coarse), (prefers-reduced-motion: reduce) {
  #crosshair-canvas {
    display: none;
  }
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: background-color var(--transition), backdrop-filter var(--transition), padding var(--transition);
}

.navbar.scrolled {
  background-color: rgba(11, 12, 16, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.logo-bracket {
  color: var(--accent);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-link {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

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

.nav-link:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
  z-index: 1001;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  position: absolute;
  left: 8px;
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger {
  top: 50%;
  transform: translateY(-50%);
}

.hamburger::before,
.hamburger::after {
  content: '';
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

.nav-toggle.active .hamburger {
  background: transparent;
}

.nav-toggle.active .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle.active .hamburger::after {
  transform: rotate(-45deg);
  top: 0;
}

/* 首屏 */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 6rem;
  position: relative;
}

.hero-container {
  max-width: 1200px;
  width: 100%;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-dim);
  margin-bottom: 1rem;
  letter-spacing: 1px;
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}

.text-accent {
  color: var(--accent);
  text-shadow: 0 0 30px var(--accent-glow);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 2.5rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  box-shadow: 0 0 0 rgba(102, 252, 241, 0);
}

.hero-cta:hover {
  background: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 0 25px var(--accent-glow);
  transform: translateY(-2px);
}

.hero-cta:hover .cta-arrow {
  transform: translateY(3px);
}

.cta-arrow {
  transition: transform var(--transition);
}

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

.hero-card {
  position: relative;
  width: 320px;
  height: 360px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.card-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(102, 252, 241, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 252, 241, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.6;
}

.card-glow {
  position: absolute;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: -50px;
  right: -50px;
  pointer-events: none;
}

.hero-nickname {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: -1rem;
  margin-bottom: 1.5rem;
  letter-spacing: 2px;
}

.hero-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 1.5rem;
  box-shadow: 0 0 30px var(--accent-glow);
  background: var(--bg-secondary);
}

.hero-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-hint {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  font-weight: 500;
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0.5;
}

.mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.mouse::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 6px;
  background: var(--accent);
  border-radius: 2px;
  animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(10px); }
}

/* 通用区块 */
.section {
  padding: 7rem 2rem;
  position: relative;
}

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

.section-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 3rem;
}

.section-number {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 700;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 3rem;
}

/* 关于我 */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 4rem;
  align-items: center;
}

.about-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3rem;
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--highlight));
}

.about-quote {
  position: relative;
  z-index: 1;
}

.quote-mark {
  font-family: Georgia, serif;
  font-size: 4rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.3;
  display: block;
  margin-bottom: -1rem;
}

.about-quote p {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--text-primary);
}

.about-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.stat-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transition: border-color var(--transition), transform var(--transition);
}

.stat-item:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

/* 技术栈 */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.tech-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.tech-card:hover {
  border-color: var(--accent);
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.tech-card:hover::before {
  transform: scaleX(1);
}

.tech-icon {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 1.25rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(102, 252, 241, 0.08);
  border-radius: var(--radius-sm);
}

.tech-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.tech-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.tech-level {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background: rgba(102, 252, 241, 0.1);
  color: var(--accent);
  border-radius: 999px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 500;
}

/* FPS 游戏 */
.games {
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(31, 40, 51, 0.3) 100%);
}

.games-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.game-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.game-card.featured {
  grid-column: span 2;
  border-color: var(--highlight);
  background: linear-gradient(135deg, rgba(252, 81, 133, 0.08), var(--bg-secondary));
}

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

.game-card.featured:hover {
  border-color: var(--highlight);
  box-shadow: 0 0 30px var(--highlight-glow);
}

.game-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
}

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

.game-card.featured .game-icon {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.game-info {
  flex: 1;
}

.game-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.game-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.game-tag {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background: rgba(102, 252, 241, 0.1);
  color: var(--accent);
  border-radius: 999px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 500;
}

.game-card.featured .game-tag {
  background: rgba(252, 81, 133, 0.15);
  color: var(--highlight);
}

/* 页脚 */
.footer {
  padding: 4rem 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

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

.footer-text {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* 滚动显隐动画 */
.reveal {
  opacity: 1;
  transform: translateY(0);
}

.js-enabled .reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.js-enabled .reveal.active,
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* 预览模式：强制显示所有 reveal 元素 */
.preview .reveal,
.preview.js-enabled .reveal {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式 */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-visual {
    order: -1;
  }

  .hero-card {
    width: 280px;
    height: 320px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .game-card.featured {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transition: right var(--transition);
    border-left: 1px solid var(--border);
  }

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

  .nav-link {
    font-size: 1.25rem;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: 7rem 1.5rem 5rem;
  }

  .hero-title {
    font-size: 2.4rem;
  }

  .section {
    padding: 5rem 1.5rem;
  }

  .section-header {
    margin-bottom: 2rem;
  }

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

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

  .about-card {
    padding: 2rem;
  }

  .quote-mark {
    font-size: 3rem;
  }

  .about-quote p {
    font-size: 1.2rem;
  }

  .scroll-indicator {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-card {
    width: 100%;
    max-width: 260px;
    height: 300px;
  }

  .hero-avatar {
    width: 100px;
    height: 100px;
    font-size: 2.5rem;
  }
}

/* 辅助：减少动画 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}