@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Orbitron:wght@700;900&display=swap');

/* ============================
   CSS 变量 & 基础重置
   ============================ */
:root {
  --c-green: #69ff69;
  --c-cyan: #00ffff;
  --c-dark: #172617;
  --c-dark2: #1e3a1e;
  --c-dark3: #0d1a0d;
  --c-mid: #233823;
  --c-text: #c8ffc8;
  --c-muted: #5a9a5a;
  --c-border: #2a4a2a;
  --c-accent: #ff69b4;
  --font-title: 'Orbitron', 'Courier New', monospace;
  --font-body: 'JetBrains Mono', 'Courier New', monospace;
  --nav-h: 64px;
  --scroll-mt: 80px;
  --radius: 0;
  --card-border: 1px solid var(--c-green);
  --glow-green: 0 0 8px var(--c-green), 0 0 24px rgba(105,255,105,0.3);
  --glow-cyan: 0 0 8px var(--c-cyan), 0 0 24px rgba(0,255,255,0.3);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background: var(--c-dark3);
}

body, .y2k-body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-dark3);
  min-height: 100vh;
  overflow-x: hidden;
}

/* 点阵底纹全局背景 */
.y2k-body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(105,255,105,0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}

.site-wrapper {
  position: relative;
  z-index: 1;
}

/* ============================
   顶部导航
   ============================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background: rgba(23,38,23,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-green);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
  z-index: 900;
  box-shadow: 0 2px 20px rgba(105,255,105,0.15);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  filter: drop-shadow(var(--glow-green));
}

.logo-text-mark {
  font-size: 1.5rem;
  color: var(--c-green);
  text-shadow: var(--glow-green);
  line-height: 1;
}

.brand-name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 1rem;
  color: var(--c-green);
  text-shadow: var(--glow-green);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.header-search {
  display: flex;
  align-items: center;
  gap: 0;
  margin-left: auto;
  border: 1px solid var(--c-green);
}

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

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

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

.search-btn:hover {
  background: var(--c-cyan);
}

.search-input--sm {
  width: 160px;
}

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--c-green);
  cursor: pointer;
  padding: 10px 12px;
  min-height: 44px;
  min-width: 44px;
  flex-shrink: 0;
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-green);
  transition: background var(--transition);
}

.hamburger:hover span {
  background: var(--c-cyan);
}

/* ============================
   全屏遮罩菜单
   ============================ */
.overlay-menu {
  position: fixed;
  inset: 0;
  background: rgba(13,26,13,0.97);
  backdrop-filter: blur(20px);
  z-index: 990;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

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

/* 遮罩菜单点阵 */
.overlay-menu::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(105,255,105,0.12) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.overlay-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: 1px solid var(--c-cyan);
  color: var(--c-cyan);
  font-size: 1.25rem;
  padding: 8px 14px;
  cursor: pointer;
  font-family: var(--font-body);
  min-height: 44px;
  min-width: 44px;
  transition: box-shadow var(--transition);
  z-index: 1;
}

.overlay-close:hover {
  box-shadow: var(--glow-cyan);
}

.overlay-nav {
  position: relative;
  z-index: 1;
  text-align: center;
}

.overlay-nav ol {
  list-style: none;
  counter-reset: nav-counter;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.overlay-nav ol li {
  counter-increment: nav-counter;
}

.overlay-nav ol li a {
  display: block;
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-text);
  text-decoration: none;
  padding: 14px 48px;
  border: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), text-shadow var(--transition);
  letter-spacing: 0.08em;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.overlay-nav ol li a::before {
  content: counter(nav-counter, decimal-leading-zero) ".";
  color: var(--c-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  min-width: 28px;
}

.overlay-nav ol li a:hover {
  color: var(--c-green);
  border-color: var(--c-green);
  text-shadow: var(--glow-green);
}

.overlay-search {
  position: relative;
  z-index: 1;
  display: flex;
  border: 1px solid var(--c-cyan);
}

.overlay-search .search-input {
  width: 260px;
  font-size: 1rem;
  padding: 12px 16px;
}

.overlay-search .search-btn {
  font-size: 1.1rem;
}

/* ============================
   Hero 区块
   ============================ */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--nav-h);
  overflow: hidden;
  background: linear-gradient(160deg, var(--c-dark3) 0%, var(--c-dark2) 60%, #0a2020 100%);
}

/* 网格底纹 */
.hero-dot-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(105,255,105,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(105,255,105,0.07) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

/* 扫描线装饰 */
.hero-scan {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,255,255,0.015) 2px,
    rgba(0,255,255,0.015) 4px
  );
  pointer-events: none;
  animation: scanMove 8s linear infinite;
}

@keyframes scanMove {
  0% { background-position: 0 0; }
  100% { background-position: 0 40px; }
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 48px;
  padding: 60px 24px;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  justify-content: center;
}

.hero-icon-wrap {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-green);
  box-shadow: var(--glow-green), inset 0 0 20px rgba(105,255,105,0.1);
  animation: heroPulse 3s ease-in-out infinite;
}

.hero-icon-fallback {
  background: rgba(105,255,105,0.05);
}

.fallback-glyph {
  font-size: 3.5rem;
  color: var(--c-green);
  text-shadow: var(--glow-green);
  line-height: 1;
}

.hero-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(var(--glow-green));
}

@keyframes heroPulse {
  0%, 100% { box-shadow: var(--glow-green), inset 0 0 20px rgba(105,255,105,0.1); }
  50% { box-shadow: var(--glow-cyan), inset 0 0 30px rgba(0,255,255,0.15); }
}

.hero-copy {
  text-align: center;
  flex: 1;
}

.hero-title {
  font-family: var(--font-title);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 900;
  color: var(--c-green);
  text-shadow: var(--glow-green);
  letter-spacing: 0.06em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 1rem;
  color: var(--c-muted);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-block;
  font-family: var(--font-title);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-dark);
  background: linear-gradient(90deg, var(--c-green), var(--c-cyan));
  padding: 14px 36px;
  text-decoration: none;
  letter-spacing: 0.1em;
  min-height: 48px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  transition: box-shadow var(--transition), filter var(--transition);
  position: relative;
  overflow: hidden;
}

.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.15), transparent 50%, rgba(255,255,255,0.08));
  pointer-events: none;
}

.hero-cta:hover {
  box-shadow: var(--glow-green);
  filter: brightness(1.1);
}

/* ============================
   正文主容器
   ============================ */
.site-main {
  padding: 60px 0;
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.content-aside-row {
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

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

/* main > article.wrap > div > section 四层直接嵌套 */
.content-section {
  /* div 是 article.wrap 的直接子元素 */
}

.content-article {
  /* section 是 div 的直接子元素 */
}

/* ============================
   正文内容样式 (page.content 内部)
   ============================ */
.content-article h2,
.content-col h2 {
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-cyan);
  text-shadow: var(--glow-cyan);
  letter-spacing: 0.05em;
  margin-top: 48px;
  margin-bottom: 12px;
  padding-bottom: 8px;
}

.content-article h2:first-child,
.content-col h2:first-child {
  margin-top: 0;
}

.content-article h3,
.content-col h3 {
  font-family: var(--font-title);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-green);
  letter-spacing: 0.04em;
  margin-top: 32px;
  margin-bottom: 10px;
}

.content-article hr,
.content-col hr {
  border: none;
  border-top: 1px solid var(--c-green);
  margin: 16px 0 24px;
  opacity: 0.5;
}

.content-article p,
.content-col p {
  margin-bottom: 16px;
  color: var(--c-text);
}

.content-article ul,
.content-article ol,
.content-col ul,
.content-col ol {
  margin: 16px 0 20px 24px;
  color: var(--c-text);
}

.content-article li,
.content-col li {
  margin-bottom: 8px;
  line-height: 1.7;
}

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

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

.content-article strong,
.content-col strong {
  color: var(--c-cyan);
}

.content-article code,
.content-col code {
  font-family: var(--font-body);
  background: var(--c-mid);
  color: var(--c-green);
  padding: 2px 6px;
  font-size: 0.9em;
}

/* div 内部各区块 */
.content-article div,
.content-col div {
  margin-bottom: 40px;
  padding-top: 20px;
}

.content-article div h2,
.content-col div h2 {
  margin-top: 0;
}

/* 区块分隔线 */
.content-article div + div,
.content-col div + div {
  border-top: 1px solid var(--c-border);
  padding-top: 40px;
}

/* scroll-margin for sections */
div[id] {
  scroll-margin-top: var(--scroll-mt);
}

/* ============================
   侧边栏
   ============================ */
.content-aside {
  width: 240px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  align-self: flex-start;
}

.aside-inner {
  border: 1px solid var(--c-green);
  padding: 20px;
  background: rgba(23,38,23,0.6);
}

.aside-title {
  font-family: var(--font-title);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
  text-shadow: var(--glow-cyan);
}

.aside-inner hr {
  border: none;
  border-top: 1px solid var(--c-green);
  margin: 12px 0;
  opacity: 0.4;
}

.aside-inner nav ol {
  list-style: none;
  counter-reset: aside-counter;
}

.aside-inner nav ol li {
  counter-increment: aside-counter;
}

.aside-inner nav ol li a {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--c-text);
  text-decoration: none;
  font-size: 0.8rem;
  padding: 8px 4px;
  border-bottom: 1px solid rgba(105,255,105,0.1);
  min-height: 40px;
  transition: color var(--transition);
  line-height: 1.4;
}

.aside-inner nav ol li a::before {
  content: counter(aside-counter, decimal-leading-zero);
  color: var(--c-muted);
  font-size: 0.7rem;
  flex-shrink: 0;
}

.aside-inner nav ol li a:hover {
  color: var(--c-green);
}

.aside-note {
  font-size: 0.75rem;
  color: var(--c-muted);
  line-height: 1.6;
  margin: 0;
}

/* ============================
   页脚
   ============================ */
.site-footer {
  border-top: 1px solid var(--c-green);
  padding: 32px 24px;
  text-align: center;
  background: rgba(13,26,13,0.8);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-green), var(--c-cyan), var(--c-green), transparent);
}

.footer-copy {
  font-family: var(--font-title);
  font-size: 0.85rem;
  color: var(--c-muted);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.footer-note {
  font-size: 0.75rem;
  color: rgba(90,154,90,0.7);
  line-height: 1.6;
}

/* ============================
   动效：Parallax + Stagger
   ============================ */
@media (prefers-reduced-motion: no-preference) {
  .overlay-nav ol li {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .overlay-menu.is-open .overlay-nav ol li:nth-child(1) { opacity: 1; transform: none; transition-delay: 0.05s; }
  .overlay-menu.is-open .overlay-nav ol li:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.1s; }
  .overlay-menu.is-open .overlay-nav ol li:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.15s; }
  .overlay-menu.is-open .overlay-nav ol li:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.2s; }
  .overlay-menu.is-open .overlay-nav ol li:nth-child(5) { opacity: 1; transform: none; transition-delay: 0.25s; }
  .overlay-menu.is-open .overlay-nav ol li:nth-child(6) { opacity: 1; transform: none; transition-delay: 0.3s; }
  .overlay-menu.is-open .overlay-nav ol li:nth-child(7) { opacity: 1; transform: none; transition-delay: 0.35s; }

  .content-article div {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .content-article div.in-view {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ============================
   响应式
   ============================ */
@media (max-width: 768px) {
  .site-header {
    padding: 0 16px;
    gap: 10px;
  }

  .header-search {
    display: none;
  }

  .brand-name {
    font-size: 0.8rem;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .hero-inner {
    flex-direction: column;
    gap: 28px;
    padding: 40px 16px;
  }

  .hero-icon-wrap {
    width: 90px;
    height: 90px;
  }

  .hero-title {
    font-size: clamp(1.2rem, 5vw, 1.8rem);
  }

  .content-aside-row {
    flex-direction: column;
  }

  .content-aside {
    width: 100%;
    position: static;
    order: -1;
  }

  .aside-inner nav ol li a {
    font-size: 0.85rem;
  }

  .wrap {
    padding: 0 16px;
  }

  .site-main {
    padding: 40px 0;
  }

  .overlay-nav ol li a {
    font-size: 1rem;
    padding: 12px 32px;
  }

  .overlay-search .search-input {
    width: 200px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.2rem;
  }

  .hero-cta {
    padding: 12px 24px;
    font-size: 0.8rem;
  }

  .content-article h2,
  .content-col h2 {
    font-size: 1.1rem;
  }
}

/* ============================
   iridescent / chrome 装饰
   ============================ */
.hero-cta,
.search-btn {
  background: linear-gradient(135deg, var(--c-green) 0%, var(--c-cyan) 50%, var(--c-green) 100%);
  background-size: 200% 200%;
  animation: shimmer 4s ease infinite;
}

@keyframes shimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-cta,
  .search-btn {
    animation: none;
    background: linear-gradient(135deg, var(--c-green), var(--c-cyan));
  }
}