@import url('https://fonts.googleapis.com/css2?family=Figtree:wght@300;400;500;600;700&family=Noto+Sans:wght@300;400;500;700&display=swap');

/* ===== CSS变量 ===== */
:root {
  --clr-bg: #0d0d0d;
  --clr-surface: #111118;
  --clr-surface2: #16161f;
  --clr-purple: #8000ff;
  --clr-pink: #ff00ff;
  --clr-purple-dim: rgba(128,0,255,0.18);
  --clr-pink-dim: rgba(255,0,255,0.12);
  --clr-text: #e8e0f0;
  --clr-text-muted: #9988bb;
  --clr-border: rgba(128,0,255,0.35);
  --clr-border-pink: rgba(255,0,255,0.3);
  --glow-purple: 0 0 8px #8000ff, 0 0 20px rgba(128,0,255,0.5);
  --glow-pink: 0 0 8px #ff00ff, 0 0 20px rgba(255,0,255,0.5);
  --nav-width: 220px;
  --font-main: 'Figtree', 'Noto Sans', system-ui, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
  --radius: 10px;
  --transition: 0.25s ease;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  background: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
}
body, .dark-body {
  background: var(--clr-bg);
  min-height: 100vh;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--clr-pink); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--clr-purple); text-shadow: var(--glow-purple); }
ul, menu { list-style: none; }
h1,h2,h3,h4,h5,h6 { line-height: 1.3; font-weight: 700; }

/* ===== 扫描线叠层 ===== */
.scanlines {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.08) 3px,
    rgba(0,0,0,0.08) 4px
  );
}

/* ===== 侧边导航 ===== */
.sidenav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--clr-surface);
  border-right: 1px solid var(--clr-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
}

.sidenav-brand {
  padding: 28px 20px 20px;
  border-bottom: 1px solid var(--clr-border);
  flex-shrink: 0;
}

.brand-link {
  display: block;
  text-decoration: none;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.brand-text {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-purple);
  text-shadow: var(--glow-purple);
  letter-spacing: 0.04em;
  line-height: 1.4;
  word-break: break-all;
  padding: 4px 0;
}

.site-logo {
  max-width: 160px;
  height: auto;
  filter: drop-shadow(0 0 6px var(--clr-purple));
}

/* details/summary 导航 */
.nav-details {
  flex: 1;
  overflow: hidden;
}

.nav-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--clr-text-muted);
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--clr-border);
  list-style: none;
  text-transform: uppercase;
  min-height: 44px;
}
.nav-summary::-webkit-details-marker { display: none; }
.nav-summary::after {
  content: '▾';
  margin-left: auto;
  transition: transform var(--transition);
  color: var(--clr-purple);
}
.nav-details[open] .nav-summary::after { transform: rotate(180deg); }

.nav-menu {
  padding: 10px 0;
}
.nav-menu li { width: 100%; }
.nav-menu li a {
  display: flex;
  align-items: center;
  padding: 11px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--clr-text);
  border-left: 2px solid transparent;
  transition: all var(--transition);
  min-height: 44px;
}
.nav-menu li a:hover,
.nav-menu li a:focus {
  color: var(--clr-pink);
  border-left-color: var(--clr-pink);
  background: var(--clr-pink-dim);
  text-shadow: var(--glow-pink);
  padding-left: 26px;
}

.sidenav-cta {
  padding: 16px 20px 24px;
  border-top: 1px solid var(--clr-border);
  flex-shrink: 0;
}
.cta-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--clr-purple), var(--clr-pink));
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius);
  letter-spacing: 0.05em;
  box-shadow: var(--glow-purple);
  transition: all var(--transition);
  min-height: 44px;
  line-height: 1.5;
}
.cta-btn:hover {
  box-shadow: var(--glow-pink);
  transform: translateY(-1px);
  color: #fff;
}

/* ===== 页面包装 ===== */
.page-wrapper {
  margin-left: var(--nav-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Hero ===== */
.site-header {
  position: relative;
  width: 100%;
  min-height: 70vh;
  display: flex;
  align-items: stretch;
}

.hero-inner {
  position: relative;
  width: 100%;
  min-height: 70vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a0030 0%, #0d0d0d 60%, #1a001a 100%);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(13,13,13,0.92) 0%,
    rgba(128,0,255,0.18) 50%,
    rgba(13,13,13,0.75) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 620px;
  padding: 48px 48px 56px;
  text-align: left;
}

.hero-badge {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  border: 1px solid var(--clr-pink);
  color: var(--clr-pink);
  border-radius: 4px;
  margin-bottom: 18px;
  text-shadow: var(--glow-pink);
  box-shadow: 0 0 8px rgba(255,0,255,0.2);
  text-transform: uppercase;
}

.hero-h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: #fff;
  margin-bottom: 16px;
  text-shadow: var(--glow-purple);
  letter-spacing: 0.02em;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--clr-text-muted);
  margin-bottom: 28px;
  max-width: 480px;
  line-height: 1.7;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 32px;
  background: transparent;
  border: 2px solid var(--clr-purple);
  color: var(--clr-purple);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius);
  text-shadow: var(--glow-purple);
  box-shadow: var(--glow-purple), inset 0 0 12px rgba(128,0,255,0.1);
  transition: all var(--transition);
  min-height: 44px;
  letter-spacing: 0.06em;
}
.hero-cta:hover {
  background: var(--clr-purple);
  color: #fff;
  box-shadow: var(--glow-purple);
}

/* ===== 内容布局（aside + main）===== */
.content-layout {
  display: flex;
  flex: 1;
  align-items: flex-start;
  gap: 0;
}

/* aside 在左 */
.content-aside {
  width: 200px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: var(--clr-surface2);
  border-right: 1px solid var(--clr-border);
  padding: 0;
}

.aside-inner {
  padding: 28px 16px 28px;
}

.aside-title {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--clr-purple);
  text-shadow: var(--glow-purple);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.content-aside hr,
div > article hr,
h2 + hr,
h3 + hr {
  border: none;
  border-top: 1px solid var(--clr-border);
  margin: 12px 0 16px;
}

.aside-links { display: flex; flex-direction: column; gap: 4px; }
.aside-link {
  display: flex;
  align-items: center;
  padding: 8px 10px;
  font-size: 0.83rem;
  color: var(--clr-text-muted);
  border-radius: 6px;
  border: 1px solid transparent;
  transition: all var(--transition);
  min-height: 44px;
  line-height: 1.4;
}
.aside-link:hover {
  color: var(--clr-pink);
  border-color: var(--clr-border-pink);
  background: var(--clr-pink-dim);
  text-shadow: none;
}

.aside-badge {
  margin-top: 28px;
  padding: 12px 10px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  background: var(--clr-purple-dim);
  text-align: center;
}
.badge-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--clr-purple);
  text-shadow: var(--glow-purple);
  margin-bottom: 4px;
}
.badge-sub {
  display: block;
  font-size: 0.72rem;
  color: var(--clr-text-muted);
  letter-spacing: 0.06em;
}

/* ===== 主内容 ===== */
.content-main {
  flex: 1;
  min-width: 0;
  padding: 0;
}

.main-article {
  width: 100%;
}

.main-section {
  padding: 0;
}

.content-body {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 40px;
}

/* ===== 正文内部样式 ===== */
.content-body h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.65rem);
  color: var(--clr-purple);
  text-shadow: var(--glow-purple);
  margin-top: 48px;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}
.content-body h2:first-child { margin-top: 0; }

.content-body hr {
  border: none;
  border-top: 1px solid var(--clr-border);
  margin-bottom: 20px;
}

.content-body h3 {
  font-size: 1.1rem;
  color: var(--clr-pink);
  text-shadow: 0 0 6px rgba(255,0,255,0.4);
  margin-top: 28px;
  margin-bottom: 8px;
}

.content-body p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--clr-text);
  margin-bottom: 16px;
}

.content-body ul,
.content-body ol {
  padding-left: 1.4em;
  margin-bottom: 16px;
}
.content-body li {
  margin-bottom: 6px;
  font-size: 1rem;
  line-height: 1.7;
}

.content-body a {
  color: var(--clr-pink);
  border-bottom: 1px solid rgba(255,0,255,0.3);
  transition: all var(--transition);
}
.content-body a:hover {
  color: var(--clr-purple);
  border-bottom-color: var(--clr-purple);
  text-shadow: var(--glow-purple);
}

.content-body article {
  margin-bottom: 16px;
  padding-top: 8px;
  scroll-margin-top: 80px;
}

.content-body strong { color: var(--clr-pink); font-weight: 600; }
.content-body em { color: var(--clr-text-muted); font-style: italic; }

.content-body blockquote {
  border-left: 3px solid var(--clr-purple);
  margin: 20px 0;
  padding: 12px 20px;
  background: var(--clr-purple-dim);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--clr-text-muted);
  font-style: italic;
}

.content-body code {
  font-family: var(--font-mono);
  background: rgba(128,0,255,0.15);
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.9em;
  color: var(--clr-pink);
}

.content-body pre {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  overflow-x: auto;
  margin: 20px 0;
}

/* article 内的 h2/h3 + hr */
.content-body article > h2 + hr,
.content-body article > h3 + hr {
  margin-top: 4px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding: 32px 40px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.footer-brand {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  font-weight: 500;
}

.footer-contact {
  display: block;
  font-size: 0.88rem;
  color: var(--clr-text-muted);
}
.footer-contact a {
  color: var(--clr-purple);
  border-bottom: 1px solid var(--clr-border);
}
.footer-contact a:hover { color: var(--clr-pink); }

.footer-note {
  display: block;
  font-size: 0.78rem;
  color: #5a5070;
  margin-top: 4px;
}

/* ===== 滚动动画 ===== */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.55s ease, transform 0.55s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: none;
  }
  .stagger-list > * {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.4s ease, transform 0.4s ease;
  }
  .stagger-list.visible > *:nth-child(1) { transition-delay: 0s; }
  .stagger-list.visible > *:nth-child(2) { transition-delay: 0.08s; }
  .stagger-list.visible > *:nth-child(3) { transition-delay: 0.16s; }
  .stagger-list.visible > *:nth-child(4) { transition-delay: 0.24s; }
  .stagger-list.visible > *:nth-child(5) { transition-delay: 0.32s; }
  .stagger-list.visible > *:nth-child(6) { transition-delay: 0.40s; }
  .stagger-list.visible > *:nth-child(n+7) { transition-delay: 0.48s; }
  .stagger-list.visible > * {
    opacity: 1;
    transform: none;
  }
}

/* ===== Glitch 标题动效 ===== */
@media (prefers-reduced-motion: no-preference) {
  @keyframes glitch-skew {
    0%,100% { transform: skewX(0deg); }
    10% { transform: skewX(-2deg); }
    20% { transform: skewX(1.5deg); }
    30% { transform: skewX(0deg); }
    80% { transform: skewX(0.5deg); }
    90% { transform: skewX(-1deg); }
  }
  .hero-h1 {
    animation: glitch-skew 6s infinite;
  }
  @keyframes neon-pulse {
    0%,100% { text-shadow: var(--glow-purple); }
    50% { text-shadow: 0 0 16px #8000ff, 0 0 40px rgba(128,0,255,0.7); }
  }
  .brand-text {
    animation: neon-pulse 3s ease-in-out infinite;
  }
}

/* ===== 移动端 ===== */
@media (max-width: 900px) {
  :root { --nav-width: 0px; }

  .sidenav {
    position: fixed;
    top: 0;
    left: -260px;
    width: 240px;
    height: 100vh;
    transition: left 0.3s ease;
    z-index: 200;
  }
  .sidenav.open { left: 0; box-shadow: 4px 0 32px rgba(128,0,255,0.4); }

  .page-wrapper { margin-left: 0; }

  .mobile-nav-toggle {
    display: flex;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 300;
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: 8px;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
  }
  .mobile-nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--clr-purple);
    box-shadow: 0 0 4px var(--clr-purple);
    border-radius: 1px;
    transition: all 0.25s ease;
  }

  .content-layout { flex-direction: column; }

  .content-aside {
    width: 100%;
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--clr-border);
  }
  .aside-inner { padding: 20px 20px; }
  .aside-links { flex-direction: row; flex-wrap: wrap; gap: 6px; }
  .aside-link { font-size: 0.78rem; padding: 6px 10px; min-height: 44px; }
  .aside-badge { display: none; }

  .content-body { padding: 28px 20px; }

  .hero-content { padding: 28px 20px 36px; }
  .hero-h1 { font-size: clamp(1.4rem, 6vw, 2rem); }

  .site-footer {
    flex-direction: column;
    padding: 24px 20px;
    gap: 8px;
  }
}

@media (min-width: 901px) {
  .mobile-nav-toggle { display: none; }
}

@media (max-width: 480px) {
  .content-body { padding: 20px 14px; }
  .hero-content { padding: 20px 14px 28px; }
}