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

/* ============================================================
   CSS 变量 & 重置
   ============================================================ */
:root {
  --c-primary: #8000ff;
  --c-secondary: #ff00ff;
  --c-bg: #0d0d0d;
  --c-bg2: #111118;
  --c-glass: rgba(128,0,255,0.08);
  --c-glass-border: rgba(128,0,255,0.35);
  --c-text: #e8e0ff;
  --c-text-muted: #9d8ec7;
  --c-neon-green: #00ff9f;
  --c-pink: #ff00ff;
  --radius-card: 28px;
  --radius-sm: 8px;
  --font-main: 'DM Sans', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
  --header-h: 64px;
  --sticky-h: 44px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --glow-primary: 0 0 12px rgba(128,0,255,0.7), 0 0 24px rgba(128,0,255,0.4);
  --glow-pink: 0 0 12px rgba(255,0,255,0.7), 0 0 24px rgba(255,0,255,0.4);
  --glow-text: 0 0 8px rgba(128,0,255,0.9);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--sticky-h) + 12px);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body.cyberpunk-body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   扫描线叠层
   ============================================================ */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.18) 3px,
    rgba(0,0,0,0.18) 4px
  );
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 200;
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-glass-border);
  box-shadow: 0 0 20px rgba(128,0,255,0.15);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-img { height: 40px; width: auto; }

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-primary);
  text-shadow: var(--glow-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 搜索框 */
.search-form {
  display: flex;
  align-items: center;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.search-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--c-text);
  font-family: var(--font-main);
  font-size: 0.875rem;
  padding: 8px 12px;
  width: 180px;
  min-height: 40px;
}

.search-input::placeholder { color: var(--c-text-muted); }

.search-btn {
  background: transparent;
  border: none;
  color: var(--c-secondary);
  cursor: pointer;
  padding: 8px 12px;
  min-height: 40px;
  min-width: 40px;
  font-size: 1rem;
  transition: color var(--transition);
}

.search-btn:hover { color: var(--c-primary); text-shadow: var(--glow-primary); }

/* 汉堡 */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.hbar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-secondary);
  border-radius: 2px;
  transition: background var(--transition);
}

.hamburger:hover .hbar { background: var(--c-primary); }

/* ============================================================
   粘性锚点条
   ============================================================ */
.sticky-anchors {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  height: var(--sticky-h);
  z-index: 190;
  background: rgba(13,13,13,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,0,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.sticky-anchors::-webkit-scrollbar { display: none; }

.anchor-link {
  display: flex;
  align-items: center;
  padding: 0 14px;
  height: 100%;
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  white-space: nowrap;
  letter-spacing: 0.02em;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition), text-shadow var(--transition);
}

.anchor-link:hover,
.anchor-link.active {
  color: var(--c-secondary);
  border-bottom-color: var(--c-secondary);
  text-shadow: var(--glow-pink);
}

/* ============================================================
   全屏遮罩菜单
   ============================================================ */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 299;
  background: rgba(0,0,0,0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.menu-overlay.is-active {
  opacity: 1;
  pointer-events: all;
}

.fullscreen-menu {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(13,13,13,0.97);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: scale(1.04);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.fullscreen-menu.is-open {
  opacity: 1;
  pointer-events: all;
  transform: scale(1);
}

.menu-close {
  position: absolute;
  top: 24px; right: 28px;
  background: transparent;
  border: 1px solid var(--c-glass-border);
  color: var(--c-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.menu-close:hover {
  color: var(--c-primary);
  border-color: var(--c-primary);
  box-shadow: var(--glow-primary);
}

.menu-details { width: 100%; max-width: 520px; }

.menu-summary {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--c-primary);
  text-shadow: var(--glow-text);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  list-style: none;
  margin-bottom: 24px;
  text-align: center;
  cursor: default;
}

.menu-summary::-webkit-details-marker { display: none; }

.menu-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 14px 28px;
  color: var(--c-text);
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: color var(--transition), border-color var(--transition), text-shadow var(--transition), background var(--transition);
  position: relative;
  min-height: 52px;
}

.nav-link::before {
  content: '▸';
  margin-right: 12px;
  color: var(--c-primary);
  font-size: 0.9em;
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
  transform: translateX(-6px);
}

.nav-link:hover {
  color: var(--c-secondary);
  text-shadow: var(--glow-pink);
  border-color: rgba(255,0,255,0.3);
  background: rgba(255,0,255,0.06);
}

.nav-link:hover::before {
  opacity: 1;
  transform: translateX(0);
}

/* ============================================================
   Hero
   ============================================================ */
.hero-section {
  min-height: 45vh;
  padding-top: calc(var(--header-h) + var(--sticky-h) + 40px);
  padding-bottom: 40px;
  padding-left: 24px;
  padding-right: 24px;
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 40px;
  position: relative;
}

.hero-inner {
  flex: 1;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(128,0,255,0.12);
  border: 1px solid rgba(128,0,255,0.4);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--c-primary);
  text-shadow: var(--glow-text);
  margin-bottom: 20px;
  letter-spacing: 0.06em;
}

.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--c-neon-green);
  box-shadow: 0 0 8px var(--c-neon-green);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-h1 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
  text-shadow: 0 0 20px rgba(128,0,255,0.5);
  margin-bottom: 16px;
  animation: glitch-text 6s infinite;
}

@keyframes glitch-text {
  0%,90%,100% { transform: none; }
  92% { transform: skewX(-2deg) translateX(2px); }
  94% { transform: skewX(1deg) translateX(-1px); }
  96% { transform: none; }
}

.hero-lead {
  font-size: 1.0625rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 520px;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow: var(--glow-primary);
  min-height: 48px;
  letter-spacing: 0.04em;
  transition: box-shadow var(--transition), transform var(--transition);
}

.cta-btn:hover {
  box-shadow: var(--glow-pink), var(--glow-primary);
  transform: translateY(-2px);
}

/* Hero 装饰 */
.hero-deco {
  flex-shrink: 0;
  width: 200px;
  height: 200px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hud-ring {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid rgba(128,0,255,0.5);
  width: 160px; height: 160px;
  animation: rotate-ring 8s linear infinite;
}

.hud-ring-2 {
  width: 200px; height: 200px;
  border-color: rgba(255,0,255,0.3);
  animation-duration: 12s;
  animation-direction: reverse;
}

@keyframes rotate-ring {
  to { transform: rotate(360deg); }
}

.glitch-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--c-neon-green);
  text-shadow: 0 0 8px var(--c-neon-green);
  letter-spacing: 0.1em;
  text-align: center;
  position: absolute;
}

/* ============================================================
   主内容区
   ============================================================ */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px 60px;
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

.wrap {
  flex: 1;
  min-width: 0;
}

.wrap > article {
  width: 100%;
}

.wrap > article > section.content-article {
  width: 100%;
}

/* 正文内容样式 */
.content-article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-secondary);
  text-shadow: var(--glow-pink);
  margin: 40px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,0,255,0.25);
  position: relative;
  scroll-margin-top: calc(var(--header-h) + var(--sticky-h) + 12px);
}

.content-article h2::before {
  content: '';
  display: block;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--c-primary), var(--c-secondary));
  position: absolute;
  left: -16px;
  top: 0;
  border-radius: 2px;
}

.content-article h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--c-primary);
  text-shadow: var(--glow-text);
  margin: 28px 0 10px;
  scroll-margin-top: calc(var(--header-h) + var(--sticky-h) + 12px);
}

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

.content-article ul,
.content-article ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.content-article li {
  color: var(--c-text);
  line-height: 1.75;
  margin-bottom: 6px;
}

.content-article a {
  color: var(--c-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition), text-shadow var(--transition);
}

.content-article a:hover {
  color: var(--c-primary);
  text-shadow: var(--glow-text);
}

.content-article strong {
  color: #fff;
  font-weight: 700;
}

.content-article blockquote {
  border-left: 3px solid var(--c-primary);
  background: var(--c-glass);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 16px;
  color: var(--c-text-muted);
}

/* article 区块 */
.content-article article {
  padding: 40px 0;
  border-bottom: 1px solid rgba(128,0,255,0.12);
  scroll-margin-top: calc(var(--header-h) + var(--sticky-h) + 12px);
}

.content-article article:last-child {
  border-bottom: none;
}

/* ============================================================
   侧边栏
   ============================================================ */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-h) + var(--sticky-h) + 20px);
  max-height: calc(100vh - var(--header-h) - var(--sticky-h) - 40px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--c-primary) transparent;
}

.aside-inner {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  backdrop-filter: blur(10px);
  box-shadow: inset 0 0 20px rgba(128,0,255,0.05);
}

.aside-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--c-primary);
  text-shadow: var(--glow-text);
  margin-bottom: 4px;
}

.subtitle, p.subtitle {
  font-size: 0.8125rem;
  color: var(--c-text-muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

.aside-nav {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.aside-nav li {
  opacity: 0.92;
  transition: opacity 0.2s;
}

.aside-nav li.fade-in {
  animation: fadeSlideIn 0.4s ease both;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateX(8px); }
  to { opacity: 1; transform: translateX(0); }
}

.aside-nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
  min-height: 40px;
}

.aside-nav a::before {
  content: '◆';
  font-size: 0.5em;
  color: var(--c-primary);
  flex-shrink: 0;
}

.aside-nav a:hover {
  color: var(--c-secondary);
  background: rgba(255,0,255,0.07);
  border-color: rgba(255,0,255,0.25);
}

.aside-deco {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
}

.neon-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--c-primary), var(--c-secondary));
  box-shadow: 0 0 6px rgba(128,0,255,0.5);
}

.sys-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--c-primary);
  text-shadow: var(--glow-text);
  letter-spacing: 0.1em;
  white-space: nowrap;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: var(--c-bg2);
  border-top: 1px solid var(--c-glass-border);
  padding: 48px 24px 24px;
}

.footer-brand-row {
  text-align: center;
  margin-bottom: 40px;
}

.footer-brand-big {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px rgba(128,0,255,0.4));
  display: inline-block;
}

.footer-dl-row {
  max-width: 1200px;
  margin: 0 auto 36px;
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}

.footer-dl {
  flex: 1;
  min-width: 180px;
  max-width: 280px;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 20px 20px 16px;
  backdrop-filter: blur(6px);
}

.footer-dl dt {
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--c-primary);
  text-shadow: var(--glow-text);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(128,0,255,0.2);
}

.footer-dl dd {
  font-size: 0.875rem;
  color: var(--c-text-muted);
  line-height: 1.6;
  margin-bottom: 4px;
}

.footer-dl dd a {
  color: var(--c-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-dl dd a:hover { color: var(--c-primary); }

.footer-dl dd.fade-in {
  animation: fadeSlideIn 0.4s ease both;
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid rgba(128,0,255,0.15);
  padding-top: 20px;
}

.copyright {
  font-size: 0.8125rem;
  color: var(--c-text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ============================================================
   prefers-reduced-motion
   ============================================================ */
@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;
  }
  .hero-h1 { animation: none; }
  .badge-dot { animation: none; }
  .hud-ring { animation: none; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .hero-deco { display: none; }
  .hero-section { min-height: auto; }

  main {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    position: static;
    max-height: none;
  }

  .aside-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .search-input { width: 120px; }

  .hero-section {
    padding-top: calc(var(--header-h) + var(--sticky-h) + 24px);
    padding-bottom: 24px;
  }

  .hero-h1 { font-size: 1.5rem; }

  .sticky-anchors { justify-content: flex-start; padding-left: 12px; }

  .footer-dl-row { flex-direction: column; align-items: stretch; }
  .footer-dl { max-width: 100%; }

  .aside-nav { grid-template-columns: 1fr; }

  .nav-link {
    font-size: 1.0625rem;
    padding: 12px 20px;
  }

  main { padding: 0 16px 40px; }
  .hero-section { padding-left: 16px; padding-right: 16px; }
}

@media (max-width: 375px) {
  .header-inner { padding: 0 14px; }
  .search-form { display: none; }
}