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

/* ── 全局重置 ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

: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: #e0d6f5;
  --c-text-muted: #9b8ab8;
  --c-green: #00ff9f;
  --c-white: #ffffff;
  --radius-card: 18px;
  --font-main: 'Be Vietnam Pro', 'Noto Sans', system-ui, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
  --nav-h: 110px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: var(--nav-h);
}

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;
}

/* ── 扫描线遮罩 ── */
body.cyberpunk-body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.18) 3px,
    rgba(0,0,0,0.18) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ── 链接 ── */
a {
  color: var(--c-accent);
  text-decoration: none;
  transition: color var(--transition), text-shadow var(--transition);
}
a:hover, a:focus-visible {
  color: var(--c-white);
  text-shadow: 0 0 8px var(--c-accent);
  outline: none;
}

/* ── HEADER ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  box-shadow: 0 0 24px rgba(128,0,255,0.25);
}

/* 品牌行 */
.header-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.5rem;
  gap: 1rem;
  border-bottom: 1px solid rgba(128,0,255,0.18);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.header-brand .logo-mark { width: 32px; height: 32px; object-fit: contain; }
.header-brand .logo { height: 36px; width: auto; }
.brand-text {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-primary);
  text-shadow: 0 0 14px var(--c-primary), 0 0 30px rgba(128,0,255,0.5);
  font-family: var(--font-mono);
}
.brand-text:hover { color: var(--c-accent); text-shadow: 0 0 14px var(--c-accent); }

/* 搜索框 */
.header-search { flex: 0 1 340px; }
.search-form {
  display: flex;
  align-items: center;
  background: rgba(128,0,255,0.1);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-form:focus-within {
  border-color: var(--c-accent);
  box-shadow: 0 0 12px rgba(255,0,255,0.4);
}
.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  padding: 0.45rem 1rem;
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  min-width: 0;
}
.search-input::placeholder { color: var(--c-text-muted); }
.search-btn {
  background: transparent;
  border: none;
  color: var(--c-primary);
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  font-size: 1.1rem;
  transition: color var(--transition);
  min-height: 40px;
}
.search-btn:hover { color: var(--c-accent); }

/* 导航行 — nav > p > a */
.site-nav {
  padding: 0 1.5rem;
}
.nav-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.55rem 0;
  align-items: center;
}
.nav-pills a {
  display: inline-flex;
  align-items: center;
  padding: 0 0.9rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text-muted);
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 40px;
}
.nav-pills a:hover, .nav-pills a:focus-visible {
  color: var(--c-white);
  border-color: var(--c-primary);
  background: rgba(128,0,255,0.18);
  text-shadow: 0 0 8px var(--c-primary);
  box-shadow: 0 0 10px rgba(128,0,255,0.3);
}

/* ── MAIN WRAP ── */
main { width: 100%; }
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ── HERO ── */
.hero-section {
  border-bottom: 1px solid var(--c-border);
  padding: 2rem 0 1.8rem;
  position: relative;
  overflow: hidden;
}
.hero-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 80% 50%, rgba(128,0,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-article {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  width: 100%;
}
.hero-text {
  text-align: left;
  max-width: 680px;
}

.hero-h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-white);
  text-shadow: 0 0 20px var(--c-primary), 0 0 50px rgba(128,0,255,0.4);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}
.hero-desc {
  color: var(--c-text-muted);
  font-size: 1.05rem;
  max-width: 540px;
}
.hero-media { margin-top: 0.5rem; }
.hero-media img { width: 100%; max-width: 500px; border-radius: var(--radius-card); opacity: 0.85; }

/* Glitch effect */
.glitch { position: relative; }
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0; top: 0;
  width: 100%;
  overflow: hidden;
}
.glitch::before {
  animation: glitch-top 3.5s infinite linear;
  color: var(--c-accent);
  clip-path: polygon(0 0, 100% 0, 100% 40%, 0 40%);
  opacity: 0.7;
}
.glitch::after {
  animation: glitch-bot 4.2s infinite linear;
  color: var(--c-primary);
  clip-path: polygon(0 60%, 100% 60%, 100% 100%, 0 100%);
  opacity: 0.6;
}

@keyframes glitch-top {
  0%,90%,100% { transform: translate(0); }
  91% { transform: translate(-3px, -1px) skewX(-5deg); }
  93% { transform: translate(3px, 1px) skewX(3deg); }
  95% { transform: translate(0); }
}
@keyframes glitch-bot {
  0%,88%,100% { transform: translate(0); }
  89% { transform: translate(3px, 2px) skewX(4deg); }
  92% { transform: translate(-2px, -1px) skewX(-3deg); }
  94% { transform: translate(0); }
}

/* ── CONTENT SECTION ── */
.content-section {
  padding: 2.5rem 0 3rem;
}

/* main > section.wrap > div > article 四层 */
.content-article {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

/* ASIDE — 左侧 */
.content-aside {
  flex: 0 0 200px;
  position: sticky;
  top: calc(var(--nav-h) + 1rem);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-card);
  padding: 1.2rem 1rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 18px rgba(128,0,255,0.12);
}
.aside-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
}
.aside-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-primary);
  text-shadow: 0 0 8px var(--c-primary);
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
}
.aside-links {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.aside-link {
  font-size: 0.82rem;
  color: var(--c-text-muted);
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  border-left: 2px solid transparent;
  transition: all var(--transition);
  display: block;
  min-height: 32px;
  line-height: 1.4;
}
.aside-link:hover, .aside-link:focus-visible {
  color: var(--c-white);
  border-left-color: var(--c-accent);
  background: rgba(255,0,255,0.08);
  text-shadow: none;
}

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

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
}
.content-h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 1.5rem;
  text-shadow: 0 0 10px var(--c-primary);
  font-family: var(--font-mono);
}

/* page.content 里的排版 */
.page-content { line-height: 1.8; }

.page-content h1,
.page-content h2,
.page-content h3,
.page-content h4 {
  color: var(--c-white);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
}
.page-content h2 {
  font-size: 1.35rem;
  text-shadow: 0 0 8px var(--c-primary);
  border-left: 3px solid var(--c-primary);
  padding-left: 0.75rem;
}
.page-content h3 {
  font-size: 1.1rem;
  color: var(--c-accent);
}
.page-content p { margin-bottom: 0.9rem; }
.page-content ul, .page-content ol {
  margin: 0.75rem 0 0.75rem 1.5rem;
}
.page-content li { margin-bottom: 0.4rem; }

/* div 区块 */
.page-content div {
  margin-bottom: 3rem;
  padding: 2rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-card);
  backdrop-filter: blur(6px);
  position: relative;
  overflow: hidden;
  scroll-margin-top: calc(var(--nav-h) + 1rem);
}
.page-content div::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  opacity: 0.7;
}

.page-content a {
  color: var(--c-accent);
  border-bottom: 1px solid rgba(255,0,255,0.3);
  transition: all var(--transition);
}
.page-content a:hover {
  border-bottom-color: var(--c-accent);
  text-shadow: 0 0 6px var(--c-accent);
}

.page-content strong { color: var(--c-white); font-weight: 600; }
.page-content code {
  font-family: var(--font-mono);
  background: rgba(128,0,255,0.15);
  border: 1px solid var(--c-border);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  font-size: 0.88em;
  color: var(--c-green);
}
.page-content blockquote {
  border-left: 3px solid var(--c-accent);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  background: var(--c-surface2);
  border-radius: 0 8px 8px 0;
  color: var(--c-text-muted);
  font-style: italic;
}

/* ── FOOTER ── */
.site-footer {
  background: rgba(13,13,13,0.97);
  border-top: 1px solid var(--c-border);
  box-shadow: 0 -4px 30px rgba(128,0,255,0.15);
  padding: 2rem 1.5rem 1.5rem;
  text-align: center;
}
.footer-brand-line {
  font-size: 0.95rem;
  color: var(--c-text-muted);
  margin-bottom: 0.6rem;
}
.footer-brand-line strong {
  color: var(--c-primary);
  font-family: var(--font-mono);
}
.footer-contact {
  font-size: 0.88rem;
  color: var(--c-text-muted);
  margin-bottom: 0.6rem;
}
.footer-contact a { color: var(--c-accent); }
.footer-copy {
  display: block;
  font-size: 0.78rem;
  color: rgba(155,138,184,0.6);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* ── 滚动揭露动效 ── */
@media (prefers-reduced-motion: no-preference) {
  .page-content div {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.55s ease, transform 0.55s ease;
  }
  .page-content div.is-visible {
    opacity: 1;
    transform: none;
  }
  .content-aside {
    opacity: 0;
    transform: translateX(-16px);
    transition: opacity 0.5s ease 0.1s, transform 0.5s ease 0.1s;
  }
  .content-aside.is-visible {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .glitch::before, .glitch::after { animation: none; }
  html { scroll-behavior: auto; }
}

/* ── 响应式 ── */
@media (max-width: 900px) {
  .content-article {
    flex-direction: column;
  }
  .content-aside {
    position: static;
    flex: none;
    width: 100%;
  }
  .aside-links { flex-direction: row; flex-wrap: wrap; }
  .aside-link { min-height: 40px; padding: 0.5rem 0.7rem; }
}

@media (max-width: 680px) {
  :root { --nav-h: 130px; }
  .header-brand-row { flex-wrap: wrap; padding: 0.55rem 1rem; }
  .header-search { flex: 1 1 100%; order: 3; }
  .nav-pills { padding: 0.4rem 0; gap: 0.3rem; }
  .nav-pills a {
    font-size: 0.78rem;
    padding: 0 0.7rem;
    min-height: 40px;
  }
  .site-nav { padding: 0 1rem; }
  .hero-section {
    padding: 1rem 0 0.8rem;
  }
  .hero-h1 { font-size: clamp(1.3rem, 5vw, 1.7rem); }
  .wrap { padding: 0 1rem; }
  .page-content div { padding: 1.2rem 1rem; }
}

@media (max-width: 375px) {
  :root { --nav-h: 140px; }
  .hero-section { padding: 0.8rem 0 0.6rem; }
  .hero-h1 { font-size: 1.3rem; }
  .brand-text { font-size: 1.1rem; }
  .nav-pills a { font-size: 0.75rem; padding: 0 0.6rem; }
}

button[aria-expanded]{min-width:44px;min-height:44px}