@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,500;1,400&display=swap');

/* ===== 基础变量 ===== */
:root {
  --red: #ff0000;
  --pink: #ff006e;
  --dark: #1a1a2e;
  --darker: #0d0d1a;
  --darkest: #07070f;
  --text: #e0e0f0;
  --text-dim: #9090b0;
  --border: rgba(255, 0, 110, 0.3);
  --border-red: rgba(255, 0, 0, 0.4);
  --glow-red: 0 0 10px #ff0000, 0 0 20px rgba(255,0,0,0.5);
  --glow-pink: 0 0 10px #ff006e, 0 0 20px rgba(255,0,110,0.5);
  --font: 'JetBrains Mono', 'Courier New', Courier, monospace;
  --header-h: 56px;
  --sidebar-w: 240px;
  --content-max: 1100px;
  --radius: 0;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--darker);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* CRT 扫描线全局叠加 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.07) 2px,
    rgba(0,0,0,0.07) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* 几何网格背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,0,110,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,0,110,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

a { color: var(--pink); text-decoration: none; transition: color 0.2s, text-shadow 0.2s; }
a:hover { color: var(--red); text-shadow: var(--glow-red); }
img { max-width: 100%; height: auto; display: block; }

/* ===== HEADER / NAV ===== */
.site-header {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(7, 7, 15, 0.97);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.main-nav {
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.main-nav::-webkit-scrollbar { display: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  white-space: nowrap;
  padding: 0 12px;
  margin: 0;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  height: var(--header-h);
  padding: 0 14px;
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  border-right: 1px solid rgba(255,0,110,0.15);
  transition: color 0.2s, background 0.2s;
  text-shadow: none;
}
.nav-links a:first-child { border-left: 1px solid rgba(255,0,110,0.15); }
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--pink);
  background: rgba(255,0,110,0.08);
  text-shadow: 0 0 8px rgba(255,0,110,0.6);
}

.nav-brand {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: var(--header-h);
  border-left: 1px solid var(--border);
}
.brand-icon {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--red);
  text-shadow: var(--glow-red);
  letter-spacing: -0.05em;
}

/* ===== MAIN 通用 ===== */
main {
  position: relative;
  z-index: 1;
  padding-bottom: calc(var(--header-h) + 40px);
}

/* ===== HERO（首页） ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 40px 80px;
  overflow: hidden;
  background: var(--darkest);
}

.hero-bg-text {
  position: absolute;
  bottom: -0.1em;
  right: -0.05em;
  font-size: clamp(8rem, 20vw, 18rem);
  font-weight: 500;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,0,110,0.12);
  letter-spacing: -0.05em;
  pointer-events: none;
  user-select: none;
  line-height: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.glitch-text {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 500;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 24px;
  position: relative;
  letter-spacing: -0.02em;
}
.glitch-text::before,
.glitch-text::after {
  content: attr(data-text);
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  overflow: hidden;
  clip: rect(0, 900px, 0, 0);
}
.glitch-text::before {
  color: var(--red);
  text-shadow: -2px 0 var(--red);
  animation: glitch-1 3s infinite linear alternate-reverse;
}
.glitch-text::after {
  color: var(--pink);
  text-shadow: 2px 0 var(--pink);
  animation: glitch-2 2.5s infinite linear alternate-reverse;
}

@keyframes glitch-1 {
  0%   { clip: rect(20px, 9999px, 30px, 0); transform: skew(0.3deg); }
  20%  { clip: rect(60px, 9999px, 90px, 0); transform: skew(-0.2deg); }
  40%  { clip: rect(5px,  9999px, 20px, 0); transform: skew(0.5deg); }
  60%  { clip: rect(80px, 9999px, 100px,0); transform: skew(-0.1deg); }
  80%  { clip: rect(40px, 9999px, 55px, 0); transform: skew(0.2deg); }
  100% { clip: rect(10px, 9999px, 25px, 0); transform: skew(-0.4deg); }
}
@keyframes glitch-2 {
  0%   { clip: rect(50px, 9999px, 70px, 0); transform: skew(-0.2deg) translateX(2px); }
  25%  { clip: rect(15px, 9999px, 35px, 0); transform: skew(0.4deg) translateX(-2px); }
  50%  { clip: rect(75px, 9999px, 95px, 0); transform: skew(-0.3deg); }
  75%  { clip: rect(30px, 9999px, 50px, 0); transform: skew(0.1deg) translateX(1px); }
  100% { clip: rect(55px, 9999px, 80px, 0); transform: skew(-0.5deg); }
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  height: 48px;
  padding: 0 28px;
  background: transparent;
  border: 1px solid var(--red);
  color: var(--red);
  font-family: var(--font);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  text-shadow: none;
}
.cta-btn:hover {
  background: var(--red);
  color: var(--darkest);
  box-shadow: var(--glow-red);
  text-shadow: none;
}

.hero-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0,0,0,0.15) 3px,
    rgba(0,0,0,0.15) 4px
  );
  pointer-events: none;
  z-index: 1;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,0,0,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,0,0,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 1;
}

/* ===== 内页 HERO ===== */
.inner-hero {
  padding: 80px 40px 48px;
  background: var(--darkest);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.inner-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,0,110,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,0,110,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.inner-eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--pink);
  text-shadow: var(--glow-pink);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.inner-hero h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.4rem);
  font-weight: 500;
  line-height: 1.25;
  color: var(--text);
  max-width: 800px;
  margin-bottom: 12px;
  position: relative;
}
.inner-desc {
  color: var(--text-dim);
  font-size: 0.95rem;
  max-width: 600px;
  margin-top: 8px;
}

/* Guide hero */
.guide-hero {
  padding: 80px 40px 48px;
  background: var(--darkest);
  border-bottom: 1px solid var(--border-red);
  position: relative;
  overflow: hidden;
}
.guide-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 20px,
    rgba(255,0,0,0.02) 20px,
    rgba(255,0,0,0.02) 21px
  );
  pointer-events: none;
}
.guide-eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--red);
  text-shadow: var(--glow-red);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.guide-hero h1 {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 500;
  color: var(--text);
  max-width: 800px;
  line-height: 1.3;
  margin-bottom: 12px;
  position: relative;
}

/* ===== CONTENT LAYOUT ===== */
.content-section,
.faq-body,
.changelog-body,
.about-body,
.privacy-body,
.guide-body,
.default-body {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 48px 40px;
}

.content-with-aside {
  display: flex;
  gap: 48px;
  align-items: flex-start;
}

.main-content {
  flex: 1;
  min-width: 0;
}

/* ===== SIDEBAR ===== */
.sidebar {
  flex-shrink: 0;
  width: var(--sidebar-w);
  position: sticky;
  top: 24px;
}

.sidebar h3 {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pink);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.aside-links {
  list-style: none;
  margin-bottom: 32px;
}
.aside-links li {
  border-bottom: 1px solid rgba(255,0,110,0.1);
}
.aside-links a {
  display: block;
  padding: 9px 4px;
  font-size: 0.82rem;
  color: var(--text-dim);
  transition: color 0.2s, padding-left 0.2s;
}
.aside-links a:hover,
.aside-links a.active {
  color: var(--pink);
  padding-left: 8px;
  text-shadow: none;
}

.aside-stats {
  list-style: none;
}
.aside-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,0,110,0.1);
}
.stat-num {
  font-size: 1.2rem;
  color: var(--red);
  text-shadow: var(--glow-red);
  font-weight: 500;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ===== PROSE ===== */
.prose h2, .prose h3, .prose h4 { margin: 1.8em 0 0.6em; line-height: 1.3; }
.prose h2 { font-size: 1.25rem; color: var(--text); border-left: 3px solid var(--red); padding-left: 12px; }
.prose h3 { font-size: 1.05rem; color: var(--pink); }
.prose p { margin-bottom: 1em; color: var(--text); }
.prose ul, .prose ol { padding-left: 1.5em; margin-bottom: 1em; }
.prose li { margin-bottom: 0.4em; }
.prose strong { color: var(--red); }
.prose em { color: var(--pink); font-style: italic; }
.prose code {
  background: rgba(255,0,110,0.1);
  border: 1px solid rgba(255,0,110,0.2);
  padding: 2px 6px;
  font-family: var(--font);
  font-size: 0.88em;
  color: var(--pink);
}
.prose pre {
  background: rgba(0,0,0,0.6);
  border: 1px solid var(--border);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 1.5em;
}
.prose pre code { background: none; border: none; padding: 0; }
.prose blockquote {
  border-left: 3px solid var(--pink);
  padding: 12px 20px;
  background: rgba(255,0,110,0.05);
  margin: 1.5em 0;
  color: var(--text-dim);
}
.prose a { color: var(--pink); border-bottom: 1px dotted var(--border); }
.prose a:hover { color: var(--red); border-bottom-color: var(--red); text-shadow: none; }

/* ===== 内容区 h2 装饰 ===== */
.sec-label {
  color: var(--text);
  display: inline-block;
}
.sec-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-left: 12px;
  letter-spacing: 0.08em;
  vertical-align: middle;
}
.content-section h2,
.guides-section h2 {
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pink);
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* ===== GUIDE 列表（首页） ===== */
.guides-section {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 40px 48px;
}

.guide-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.guide-list li {
  background: var(--darker);
  transition: background 0.2s;
}
.guide-list li:hover { background: rgba(255,0,110,0.06); }

.guide-list a {
  display: block;
  padding: 24px;
  color: var(--text);
  text-shadow: none;
}
.guide-list a:hover { color: var(--text); text-shadow: none; }

.card-num {
  display: block;
  font-size: 0.72rem;
  color: var(--red);
  text-shadow: var(--glow-red);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
}
.guide-list strong {
  display: block;
  font-size: 0.92rem;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.4;
}
.guide-list small {
  display: block;
  font-size: 0.78rem;
  color: var(--text-dim);
  line-height: 1.5;
}
/* 底部强调线 */
.card {
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}
.card:hover { border-bottom-color: var(--pink); }

/* ===== POST META ===== */
.post-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.post-date {
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}
.post-date.mod { color: rgba(255,0,110,0.7); }

/* ===== GUIDE PAGINATION ===== */
.guide-nav-section {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 40px 48px;
}
.guide-pagination {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}
.pag-btn {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 20px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.82rem;
  transition: border-color 0.2s, color 0.2s;
  text-shadow: none;
}
.pag-btn:hover {
  border-color: var(--pink);
  color: var(--pink);
  text-shadow: none;
}

/* ===== CHANGELOG ===== */
.changelog-prose h2 {
  border-left: 3px solid var(--red);
  padding-left: 12px;
}
.changelog-prose h3 {
  color: var(--text-dim);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
}

/* ===== FOOTER ===== */
.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 60px 40px calc(var(--header-h) + 60px);
  border-top: 1px solid var(--border);
  background: var(--darkest);
}
.footer-brand {
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 500;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,0,110,0.4);
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  line-height: 1;
}
.site-footer small {
  display: block;
  font-size: 0.78rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}
.site-footer small a {
  color: var(--text-dim);
  text-shadow: none;
}
.site-footer small a:hover { color: var(--pink); text-shadow: none; }

/* ===== SCROLL REVEAL ===== */
.reveal-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal-item.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-section .sec-label {
  display: inline-block;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.reveal-section.visible .sec-label {
  opacity: 1;
  transform: translateX(0);
}

/* ===== ABOUT HERO 特化 ===== */
.about-hero { border-bottom: 1px solid var(--border-red); }
.about-hero h1 { color: var(--text); }

/* ===== LEGAL ===== */
.legal-prose { font-size: 0.9rem; }
.legal-prose h2 { font-size: 1.1rem; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  :root { --sidebar-w: 100%; }

  .hero { padding: 60px 20px 80px; }
  .hero-bg-text { font-size: 5rem; }

  .inner-hero,
  .guide-hero { padding: 60px 20px 32px; }

  .content-section,
  .faq-body,
  .changelog-body,
  .about-body,
  .privacy-body,
  .guide-body,
  .default-body,
  .guides-section,
  .guide-nav-section { padding-left: 20px; padding-right: 20px; }

  .content-with-aside {
    flex-direction: column;
    gap: 32px;
  }

  .sidebar {
    width: 100%;
    position: static;
    border-top: 1px solid var(--border);
    padding-top: 24px;
  }

  .guide-list {
    grid-template-columns: 1fr;
  }

  .guide-pagination {
    flex-direction: column;
  }
  .pag-btn { text-align: center; justify-content: center; }

  .nav-links a {
    padding: 0 10px;
    font-size: 0.72rem;
  }

  .site-footer { padding: 40px 20px calc(var(--header-h) + 40px); }
  .footer-brand { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .glitch-text { font-size: 1.6rem; }
  .hero-desc { font-size: 0.9rem; }
  .cta-btn { height: 44px; padding: 0 20px; }
}

/* ===== prefers-reduced-motion ===== */
@media (prefers-reduced-motion: reduce) {
  .glitch-text::before,
  .glitch-text::after { animation: none; }
  .reveal-item { opacity: 1; transform: none; transition: none; }
  .reveal-section .sec-label { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}