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

/* ===== 变量 & 根基 ===== */
:root {
  --c-bg: #0d0d0d;
  --c-primary: #8000ff;
  --c-accent: #ff00ff;
  --c-surface: rgba(128, 0, 255, 0.08);
  --c-surface2: rgba(255, 0, 255, 0.06);
  --c-border: rgba(128, 0, 255, 0.35);
  --c-border2: rgba(255, 0, 255, 0.3);
  --c-text: #e0e0e0;
  --c-text-dim: #888;
  --c-text-bright: #fff;
  --c-glow-p: 0 0 8px #8000ff, 0 0 20px rgba(128,0,255,0.5);
  --c-glow-a: 0 0 8px #ff00ff, 0 0 20px rgba(255,0,255,0.5);
  --font-mono: 'Space Mono', 'Courier New', monospace;
  --font-display: 'Syncopate', 'Space Mono', monospace;
  --radius: 4px;
  --header-h: 64px;
  --anchor-h: 44px;
  --content-max: 780px;
  --layout-max: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background: var(--c-bg);
}

body.dark-mode {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-mono);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== 扫描线全局叠加 ===== */
body.dark-mode::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0,0,0,0.18) 2px,
    rgba(0,0,0,0.18) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ===== 排版基础 ===== */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  line-height: 1.25;
  color: var(--c-text-bright);
}
p { line-height: 1.75; margin-bottom: 1rem; }
a { color: var(--c-accent); text-decoration: none; transition: color 0.2s, text-shadow 0.2s; }
a:hover { color: var(--c-text-bright); text-shadow: var(--c-glow-a); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* ===== 霓虹文字 ===== */
.neon-text {
  color: var(--c-primary);
  text-shadow: var(--c-glow-p);
}
.syncopate { font-family: var(--font-display); letter-spacing: 0.1em; }

/* ===== 点阵/网格底纹辅助 ===== */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(128,0,255,0.25) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,0,255,0.12) 1px, transparent 1px);
  background-size: 28px 28px, 56px 56px;
  background-position: 0 0, 14px 14px;
  pointer-events: none;
}

/* ===== 站点包装 ===== */
.site-wrapper { display: flex; flex-direction: column; min-height: 100vh; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(13,13,13,0.92);
  border-bottom: 1px solid var(--c-border);
  backdrop-filter: blur(12px);
  height: var(--header-h);
}
.header-inner {
  max-width: var(--layout-max);
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-img { width: 32px; height: 32px; object-fit: contain; }
.brand-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-primary);
  text-shadow: var(--c-glow-p);
  white-space: nowrap;
}

/* 药丸胶囊导航 */
.pill-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0.25rem 0;
}
.pill-nav::-webkit-scrollbar { display: none; }
.nav-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
  text-decoration: none;
  transition: all 0.2s;
  min-height: 40px;
}
.nav-pill:hover,
.nav-pill.active {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
  text-shadow: var(--c-glow-p);
  box-shadow: var(--c-glow-p);
}

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
}
.search-input {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.45rem 0.75rem;
  width: 160px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-height: 40px;
}
.search-input:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 6px rgba(255,0,255,0.4);
}
.search-input::placeholder { color: var(--c-text-dim); }
.search-btn {
  background: var(--c-primary);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  min-height: 40px;
  min-width: 40px;
  transition: background 0.2s, box-shadow 0.2s;
}
.search-btn:hover {
  background: var(--c-accent);
  box-shadow: var(--c-glow-a);
}

/* ===== 二级粘性锚点条 ===== */
.sticky-anchors {
  position: sticky;
  top: var(--header-h);
  z-index: 150;
  background: rgba(13,13,13,0.88);
  border-bottom: 1px solid var(--c-border2);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 1.25rem;
  overflow-x: auto;
  scrollbar-width: none;
  height: var(--anchor-h);
}
.sticky-anchors::-webkit-scrollbar { display: none; }
.anchor-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--c-border2);
  background: var(--c-surface2);
  color: var(--c-text-dim);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  white-space: nowrap;
  text-decoration: none;
  transition: all 0.2s;
  min-height: 32px;
}
.anchor-chip:hover,
.anchor-chip.active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
  text-shadow: none;
  box-shadow: var(--c-glow-a);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--c-border);
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, var(--c-bg) 100%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2.5rem 1.5rem;
  max-width: 800px;
}
.hero-title {
  font-size: clamp(1.4rem, 4vw, 2.8rem);
  margin-bottom: 1rem;
  letter-spacing: 0.12em;
}
.hero-sub {
  font-size: 1rem;
  color: var(--c-text-dim);
  margin-bottom: 1.75rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.hero-cta-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* 频道页小Hero */
.channel-hero {
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--c-border);
}
.channel-hero-content {
  position: relative;
  z-index: 2;
  padding: 2rem 1.5rem;
  max-width: var(--layout-max);
  margin: 0 auto;
  width: 100%;
}
.channel-eyebrow, .page-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--c-accent);
  text-shadow: var(--c-glow-a);
  margin-bottom: 0.6rem;
  font-family: var(--font-display);
}
.channel-hero h1 {
  font-size: clamp(1.2rem, 3vw, 2rem);
  margin-bottom: 0.75rem;
}
.channel-hero p { color: var(--c-text-dim); max-width: 600px; }

/* ===== 按钮 ===== */
.btn-neon {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  background: var(--c-primary);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  border: 1px solid var(--c-primary);
  cursor: pointer;
  transition: all 0.2s;
  min-height: 44px;
  box-shadow: var(--c-glow-p);
}
.btn-neon:hover {
  background: transparent;
  color: var(--c-primary);
  text-shadow: var(--c-glow-p);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius);
  background: transparent;
  color: var(--c-accent);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  border: 1px solid var(--c-accent);
  cursor: pointer;
  transition: all 0.2s;
  min-height: 44px;
}
.btn-ghost:hover {
  background: var(--c-accent);
  color: #fff;
  box-shadow: var(--c-glow-a);
  text-shadow: none;
}
.btn-sm { padding: 0.45rem 1rem; font-size: 0.78rem; min-height: 40px; }

/* ===== 内容区 + 侧边栏布局 ===== */
.content-with-aside {
  display: flex;
  max-width: var(--layout-max);
  margin: 0 auto;
  width: 100%;
  padding: 2rem 1.25rem;
  gap: 2rem;
  flex: 1;
}

/* 侧边栏在左 */
.site-aside {
  width: 220px;
  flex-shrink: 0;
  order: -1;
}
.aside-block {
  margin-bottom: 1.75rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1rem;
}
.aside-title {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--c-accent);
  text-shadow: var(--c-glow-a);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--c-border2);
  font-family: var(--font-display);
}
.aside-title span { display: inline; }
.aside-nav-list { display: flex; flex-direction: column; gap: 0.3rem; }
.aside-nav-list li a {
  display: block;
  font-size: 0.8rem;
  color: var(--c-text-dim);
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius);
  transition: all 0.2s;
  border-left: 2px solid transparent;
  min-height: 40px;
  display: flex;
  align-items: center;
}
.aside-nav-list li a:hover {
  color: var(--c-primary);
  border-left-color: var(--c-primary);
  background: var(--c-surface);
  text-shadow: none;
}

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

/* article > div 结构满足契约 */
.home-article,
.channel-article,
.about-article,
.privacy-article,
.article-body { display: flex; flex-direction: column; gap: 2.5rem; }

.content-section { display: block; }

.prose-section { line-height: 1.85; }
.prose-section h2 {
  font-size: 1.25rem;
  color: var(--c-primary);
  text-shadow: var(--c-glow-p);
  margin: 1.75rem 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--c-border);
}
.prose-section h2 span { display: inline; }
.prose-section h3 {
  font-size: 1.05rem;
  color: var(--c-accent);
  margin: 1.25rem 0 0.5rem;
}
.prose-section h3 span { display: inline; }
.prose-section p { margin-bottom: 0.9rem; color: var(--c-text); }
.prose-section ul, .prose-section ol {
  list-style: disc;
  margin: 0.75rem 0 0.75rem 1.5rem;
  color: var(--c-text);
}
.prose-section li { margin-bottom: 0.4rem; }
.prose-section a { color: var(--c-accent); }
.prose-section blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  background: var(--c-surface);
  color: var(--c-text-dim);
  font-style: italic;
}

/* ===== 章节标题 ===== */
.section-title {
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  color: var(--c-text-bright);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.section-title::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 1.1em;
  background: linear-gradient(180deg, var(--c-primary), var(--c-accent));
  border-radius: 2px;
  flex-shrink: 0;
}
.section-title span { display: inline; }

/* ===== 玻璃拟态卡片 ===== */
.glass-card {
  background: linear-gradient(135deg, rgba(128,0,255,0.1), rgba(255,0,255,0.05));
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  padding: 1.25rem;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.glass-card:hover {
  border-color: var(--c-accent);
  box-shadow: 0 0 20px rgba(255,0,255,0.2), 0 4px 24px rgba(0,0,0,0.4);
  transform: translateY(-2px);
}
.glass-card h3 {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--c-text-bright);
}
.glass-card h3 span { display: inline; }
.glass-card .card-desc { font-size: 0.82rem; color: var(--c-text-dim); margin-bottom: 0.75rem; }
.card-cta {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  color: var(--c-primary);
  border: 1px solid var(--c-primary);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius);
  transition: all 0.2s;
  min-height: 32px;
}
.card-cta:hover {
  background: var(--c-primary);
  color: #fff;
  text-shadow: none;
}

/* 子链接 */
.sub-links { margin: 0.5rem 0 0.75rem; display: flex; flex-direction: column; gap: 0.25rem; }
.sub-link { font-size: 0.78rem; color: var(--c-text-dim); }
.sub-link:hover { color: var(--c-accent); }

/* ===== 频道网格 ===== */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

/* ===== 文章网格 ===== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}
.card-article { display: flex; flex-direction: column; }
.card-article h3 { font-size: 0.85rem; margin-bottom: 0.4rem; }
.card-article p { font-size: 0.8rem; color: var(--c-text-dim); flex: 1; margin-bottom: 0.5rem; }
.read-more {
  font-size: 0.78rem;
  color: var(--c-accent);
  align-self: flex-start;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}
.read-more:hover { text-shadow: var(--c-glow-a); }

/* ===== 文章页专属 ===== */
.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.breadcrumb-link {
  font-size: 0.8rem;
  color: var(--c-text-dim);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.art-date {
  font-size: 0.75rem;
  color: var(--c-text-dim);
  font-family: var(--font-mono);
}
.art-updated { font-size: 0.75rem; color: var(--c-text-dim); }
.article-h1 {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  margin-bottom: 0.75rem;
}
.article-lead {
  font-size: 1rem;
  color: var(--c-text-dim);
  margin-bottom: 1rem;
  border-left: 2px solid var(--c-primary);
  padding-left: 0.75rem;
}
.article-hero-wrap { margin: 1rem 0; border-radius: var(--radius); overflow: hidden; }
.article-hero-img { width: 100%; height: auto; object-fit: cover; max-height: 360px; }
.article-prose { font-size: 1rem; }
.privacy-date { font-size: 0.8rem; color: var(--c-text-dim); margin-top: 0.5rem; }
.contact-block { font-style: normal; }
.contact-block p { margin-bottom: 0.5rem; }

/* ===== 页脚 ===== */
.site-footer {
  background: rgba(13,13,13,0.97);
  border-top: 1px solid var(--c-border);
  margin-top: auto;
}
.footer-inner { max-width: var(--layout-max); margin: 0 auto; padding: 2.5rem 1.25rem 0; }
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--c-border);
}
.footer-col-title {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--c-primary);
  text-shadow: var(--c-glow-p);
  margin-bottom: 1rem;
  font-family: var(--font-display);
}
.footer-col-title span { display: inline; }
.footer-col address { font-style: normal; margin-bottom: 0.75rem; }
.footer-col address p { font-size: 0.8rem; color: var(--c-text-dim); margin-bottom: 0.4rem; }
.footer-col > ul { display: flex; flex-direction: column; gap: 0.3rem; }
.footer-col > ul li a {
  font-size: 0.8rem;
  color: var(--c-text-dim);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.footer-col > ul li a:hover { color: var(--c-accent); }

/* 页脚 nav > dl 结构（契约：footer nav > dl > dt/dd > a） */
.footer-col dl { display: flex; flex-direction: column; gap: 0.25rem; }
.footer-col dl dt, .footer-col dl dd { margin: 0; }
.footer-col dl a {
  font-size: 0.8rem;
  color: var(--c-text-dim);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s;
}
.footer-col dl a:hover { color: var(--c-primary); text-shadow: none; }

.footer-desc { font-size: 0.8rem; color: var(--c-text-dim); margin-bottom: 0.75rem; }
.footer-form { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-input {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.5rem 0.75rem;
  outline: none;
  min-height: 40px;
  transition: border-color 0.2s;
}
.footer-input:focus { border-color: var(--c-accent); }
.footer-input::placeholder { color: var(--c-text-dim); }

.footer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-bar p { font-size: 0.75rem; color: var(--c-text-dim); }
.footer-legal { display: flex; gap: 1rem; }
.footer-legal li a {
  font-size: 0.75rem;
  color: var(--c-text-dim);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.footer-legal li a:hover { color: var(--c-accent); text-shadow: none; }

/* ===== 动效 ===== */
@keyframes neon-pulse {
  0%, 100% { text-shadow: 0 0 8px #8000ff, 0 0 20px rgba(128,0,255,0.5); }
  50% { text-shadow: 0 0 16px #8000ff, 0 0 40px rgba(128,0,255,0.8), 0 0 60px rgba(128,0,255,0.3); }
}
@keyframes glitch {
  0%, 100% { transform: none; }
  20% { transform: skewX(-2deg) translateX(2px); }
  40% { transform: skewX(1deg) translateX(-2px); }
  60% { transform: skewX(-1deg) translateX(1px); }
  80% { transform: skewX(2deg) translateX(-1px); }
}

.hero-title .neon-text {
  animation: neon-pulse 3s ease-in-out infinite;
}
.brand-name {
  animation: neon-pulse 4s ease-in-out infinite;
}

/* 视差滚动 JS辅助类 */
.parallax-layer { will-change: transform; }

/* hover 微交互 */
.glass-card { will-change: transform; }

/* prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ===== 响应式断点 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .site-aside { width: 180px; }
}

@media (max-width: 768px) {
  :root { --header-h: 56px; }

  .header-inner { gap: 0.6rem; padding: 0 1rem; }
  .pill-nav { display: none; }
  .brand-name { font-size: 0.72rem; }
  .search-input { width: 110px; }

  .sticky-anchors { padding: 0.35rem 1rem; }

  .content-with-aside {
    flex-direction: column;
    padding: 1.25rem 1rem;
    gap: 1.5rem;
  }
  .site-aside {
    width: 100%;
    order: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  .aside-block { margin-bottom: 0; }

  .hero { min-height: 45vh; }
  .hero-title { font-size: clamp(1.1rem, 5vw, 1.8rem); }

  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
  .channel-grid { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .article-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta-row { flex-direction: column; align-items: center; }
  .site-aside { grid-template-columns: 1fr; }
  .header-search { display: none; }
}