/* ===== 变量 ===== */
:root {
  --bg-primary: #0a0118;
  --bg-card: #110728;
  --bg-card-hover: #180a3a;
  --text-primary: #e0d4ff;
  --text-secondary: #8a7ca8;
  --text-tertiary: #4a3d6a;
  --accent: #b026ff;
  --accent-dim: #7a1ab5;
  --accent-glow: rgba(176, 38, 255, 0.2);
  --accent-2: #00f0ff;
  --accent-2-glow: rgba(0, 240, 255, 0.15);
  --border: #1e0f3a;
  --border-hover: #2e1a5a;
  --font-serif: 'Songti SC', 'STSong', 'SimSun', 'Noto Serif SC', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', 'Courier New', monospace;
  --max-width: 760px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 全局背景：扫描线 + 网格 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 3px, rgba(176, 38, 255, 0.012) 3px, rgba(176, 38, 255, 0.012) 4px),
    linear-gradient(rgba(176, 38, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(176, 38, 255, 0.018) 1px, transparent 1px);
  background-size: 100% 4px, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: -10%;
  left: 50%;
  width: 800px;
  height: 600px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(176, 38, 255, 0.1), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; text-decoration: none; transition: color 0.3s ease; }
img { max-width: 100%; display: block; }

/* ===== 滚动进度条 ===== */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 8px var(--accent-glow);
  z-index: 10000;
  transition: width 0.1s ease;
}

/* ===== 鼠标光晕 ===== */
.cursor-glow {
  position: fixed;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(176, 38, 255, 0.08), transparent 60%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  opacity: 0;
}

/* ===== 固定导航 ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  z-index: 1000;
  opacity: 0;
  transform: translateY(-100%);
  transition: opacity 0.4s ease, transform 0.4s ease, background 0.4s ease;
}

.nav.visible {
  opacity: 1;
  transform: translateY(0);
  background: rgba(10, 1, 24, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: var(--text-primary);
  text-shadow: 0 0 12px var(--accent-glow);
}

.nav-links { display: flex; gap: 28px; }

.nav-link {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--accent-2);
  box-shadow: 0 0 6px var(--accent-2-glow);
  transition: width 0.3s ease;
}

.nav-link:hover { color: var(--text-primary); }
.nav-link.active { color: var(--accent-2); }
.nav-link.active::after { width: 100%; }

/* ===== Container ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

/* ===== 首屏 Hero ===== */
.hero-brand {
  position: absolute;
  top: 28px;
  left: 32px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  z-index: 5;
  opacity: 0;
  animation: fadeIn 0.8s ease 0.2s forwards;
}

.hero-brand .brand-dot {
  color: var(--accent-2);
  text-shadow: 0 0 6px var(--accent-2-glow);
}

.nav-dot {
  color: var(--accent-2);
}

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 0 24px;
  z-index: 2;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 240, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: 30%; left: 50%;
  width: 600px; height: 400px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, rgba(176, 38, 255, 0.1), transparent 60%);
  pointer-events: none;
  animation: glowPulse 6s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

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

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-2);
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeIn 0.8s ease 0.1s forwards;
  text-shadow: 0 0 8px var(--accent-2-glow);
}

.site-title {
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 12vw, 7rem);
  font-weight: 400;
  letter-spacing: 0.15em;
  margin-bottom: 1.5rem;
  transition: transform 0.3s ease-out;
  will-change: transform;
}

.title-char {
  display: inline-block;
  opacity: 0;
  transform: translateY(30px);
  animation: charReveal 1s ease forwards;
  animation-delay: calc(var(--d) * 0.3s + 0.4s);
}

@keyframes charReveal {
  to { opacity: 1; transform: translateY(0); }
}

.title-seal {
  color: var(--accent-2);
  position: relative;
  text-shadow: 0 0 20px var(--accent-2-glow), 0 0 40px var(--accent-2-glow);
}

.title-seal::after {
  content: '';
  position: absolute;
  inset: -8px -4px;
  border: 2px solid var(--accent-2);
  border-radius: 4px;
  opacity: 0;
  box-shadow: 0 0 12px var(--accent-2-glow);
  animation: sealAppear 1s ease 1s forwards;
}

@keyframes sealAppear {
  from { opacity: 0; transform: scale(1.3); }
  to { opacity: 0.3; transform: scale(1); }
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

@keyframes sealGlow {
  0%, 100% { text-shadow: 0 0 20px var(--accent-2-glow), 0 0 40px var(--accent-2-glow); }
  50% { text-shadow: 0 0 30px var(--accent-2), 0 0 60px var(--accent-2), 0 0 80px var(--accent-2-glow); }
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  min-height: 1.8em;
}

/* 状态指示器 */
.hero-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 1.5rem;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  opacity: 0;
  animation: fadeIn 0.8s ease 2.8s forwards;
}

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

.status-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--accent-2); }
  50% { opacity: 0.4; box-shadow: 0 0 4px var(--accent-2); }
}

/* 数据指标 */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-top: 2.5rem;
  opacity: 0;
  animation: fadeIn 0.8s ease 3.2s forwards;
}

.stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }

.stat-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-plus { font-size: 1rem; }

.stat-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
}

.stat-divider { width: 1px; height: 28px; background: var(--border); }

.cursor {
  color: var(--accent-2);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

/* 滚动提示 */
.scroll-hint {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  opacity: 0;
  animation: fadeIn 0.8s ease 3.5s forwards;
}

.scroll-line {
  display: block;
  width: 1px; height: 32px;
  background: linear-gradient(to bottom, transparent, var(--accent));
  animation: scrollPulse 2s ease infinite;
  transform-origin: top;
}

.scroll-text {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-tertiary);
  letter-spacing: 0.2em;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== 通用 Section ===== */
.section { padding: 120px 0; position: relative; z-index: 2; }

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 3rem;
}

.section-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-2);
  letter-spacing: 0.05em;
  text-shadow: 0 0 6px var(--accent-2-glow);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-primary);
  letter-spacing: 0.1em;
}

.section-line {
  flex: 1; height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
}

/* ===== 关于 ===== */
.about-text p {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 0.8rem;
}

.about-accent {
  color: var(--accent) !important;
  font-style: italic;
  margin-top: 1.5rem !important;
  text-shadow: 0 0 12px var(--accent-glow);
}

/* ===== 作品 ===== */
.works-grid { display: flex; flex-direction: column; gap: 1rem; }

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 32px;
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2));
  transform: scaleY(0);
  transition: transform 0.4s ease;
  transform-origin: top;
}

.project-card::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 200px; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(0, 240, 255, 0.04), transparent);
  transform: translateX(100%);
  transition: transform 0.6s ease;
  pointer-events: none;
}

.project-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: 0 0 20px rgba(176, 38, 255, 0.08);
}

.project-card:hover::before { transform: scaleY(1); }
.project-card:hover::after { transform: translateX(-100%); }

.project-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
  position: absolute;
  top: 28px; right: 32px;
}

.project-header { position: relative; }

.project-name {
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
  transition: color 0.3s ease;
}

.project-card:hover .project-name { color: #fff; }

.project-tech {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-2);
  letter-spacing: 0.03em;
}

.project-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.project-expand {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: 0.8rem;
  transition: color 0.3s ease;
}

.project-card:hover .project-expand { color: var(--text-secondary); }
.project-card.active .project-expand { color: var(--accent-2); }

.project-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, margin-top 0.4s ease, padding-top 0.4s ease;
}

.project-card.active .project-detail {
  max-height: 300px;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.project-detail p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.works-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-top: 2.5rem;
}

/* ===== 合作 ===== */
.collab-text { font-size: 1.2rem; }
.collab-text p { margin-bottom: 0.5rem; color: var(--text-secondary); }

.collab-accent {
  color: var(--accent-2) !important;
  font-family: var(--font-serif);
  font-size: 1.5rem !important;
  margin-top: 1.5rem !important;
  text-shadow: 0 0 16px var(--accent-2-glow);
}

/* ===== 联系 ===== */
.contact-content { display: flex; gap: 4rem; flex-wrap: wrap; }

.contact-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
  letter-spacing: 0.1em;
}

.contact-link {
  font-size: 1.1rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.contact-link:hover {
  color: var(--accent-2);
  border-bottom-color: var(--accent-2);
  text-shadow: 0 0 8px var(--accent-2-glow);
}

.qr-wrapper { text-align: center; }

.qr-code {
  width: 160px; height: 160px;
  border-radius: 10px;
  border: 1px solid var(--border);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.qr-code:hover {
  border-color: var(--accent);
  box-shadow: 0 0 24px rgba(176, 38, 255, 0.15);
}

.qr-tip {
  display: block;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: 0.5rem;
}

/* ===== 页脚 ===== */
.footer {
  text-align: center;
  padding: 40px 24px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 2;
}

.footer-link {
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.footer-link:hover { color: var(--accent-2); }

.footer-icp {
  margin-top: 8px;
  font-size: 0.75rem;
}

/* ===== 关于 - 能力清单 ===== */
.about-skills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
}

.skill-group {
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.skill-group:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.skill-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-2);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.3rem;
}

.skill-group p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 合作 - 服务范围 ===== */
.collab-services {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3rem;
}

.service-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.service-item:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: 0 0 16px rgba(176, 38, 255, 0.06);
}

.service-arrow {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1rem;
  margin-top: 2px;
}

.service-name {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
}

.service-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== 合作 - 服务描述 ===== */
.collab-desc {
  margin-top: 2.5rem;
  padding: 20px 24px;
  border-left: 2px solid var(--border);
}

.collab-desc p {
  font-size: 0.9rem;
  color: var(--text-tertiary);
  line-height: 1.8;
}

/* ===== 联系 - 补充信息 ===== */
.contact-info {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.info-icon {
  color: var(--accent-2);
  font-size: 0.9rem;
}

.info-divider {
  width: 1px;
  height: 16px;
  background: var(--border);
}

/* ===== 滚动渐入 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== 彩蛋 ===== */
.easter-egg {
  position: fixed;
  inset: 0;
  background: rgba(10, 1, 24, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s ease;
}

.easter-egg.show { opacity: 1; pointer-events: auto; }

.egg-content {
  text-align: center;
  max-width: 480px;
  padding: 0 24px;
  transform: translateY(20px);
  transition: transform 0.6s ease;
}

.easter-egg.show .egg-content { transform: translateY(0); }

.egg-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  line-height: 2;
}

.egg-content p:first-child {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.egg-accent {
  color: var(--accent-2) !important;
  margin-top: 1.5rem !important;
  text-shadow: 0 0 16px var(--accent-2-glow);
}

.egg-close {
  display: block;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: 2.5rem;
}

/* ===== 选中 / 滚动条 ===== */
::selection { background: var(--accent-dim); color: var(--text-primary); }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #3a2470; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav { padding: 14px 20px; }
  .nav-links { gap: 18px; }
  .nav-link { font-size: 0.8rem; }
}

@media (max-width: 640px) {
  .section { padding: 80px 0; }
  .about-text p, .collab-text p { font-size: 1rem; }
  .collab-accent { font-size: 1.2rem !important; }
  .contact-content { gap: 2rem; }
  .qr-code { width: 120px; height: 120px; }
  .project-card { padding: 20px; }
  .project-num { top: 20px; right: 20px; }
  .nav-links { gap: 14px; }
  .hero-tag { font-size: 0.7rem; }
  .hero-brand { top: 20px; left: 20px; font-size: 0.75rem; }
  .hero-stats { gap: 18px; }
  .stat-num { font-size: 1.2rem; }
  .about-skills, .collab-services { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}