/* ===== 基础重置 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-primary: #000000;
  --accent: #8AE744;
  --text-primary: #E6E6E6;
  --glitch-cyan: #4FFDC4;
  --glitch-orange: #FF7825;
  --glitch-red: #EE513A;
  --glitch-magenta: #FF00FF;
  --gray-900: #0A0A0A;
}

html, body {
  height: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', 'Source Han Sans', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
}

body {
  position: relative;
}

.mono {
  font-family: 'JetBrains Mono', 'Consolas', monospace;
}

/* ===== 扫描线与噪点 ===== */
.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.03) 0,
    rgba(255, 255, 255, 0.03) 1px,
    transparent 1px,
    transparent 4px
  );
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2.5rem;
  z-index: 100;
}

.logo {
  font-family: 'Inter', 'Source Han Sans', sans-serif;
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  text-transform: uppercase;
  transform: skewX(-12deg);
  transform-origin: left center;
}

.main-nav {
  display: flex;
  gap: 2.5rem;
  margin-left: auto;
  margin-right: 6rem;
}

.main-nav a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-decoration: none;
  text-transform: uppercase;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.main-nav a:hover::after {
  width: 100%;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.7rem;
  color: var(--text-primary);
}

.status-dot {
  color: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ===== Hero 首页 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: hidden;
}

.hero-bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 与 about 页三个背景视频保持一致的几何参数，保证转场接缝处画面连续 */
  object-position: 20% 50%;
  transform: scale(1.05);
  filter: brightness(1.15) contrast(1.05);
  z-index: 0;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, transparent 0%, rgba(0, 0, 0, 0.35) 60%, rgba(0, 0, 0, 0.75) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 1400px;
  padding: 0 5vw 12vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 88vh;
}

.hero-label {
  position: fixed;
  top: 1.55rem;
  left: 9.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  font-size: 0.55rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  z-index: 100;
  opacity: 0;
  animation: fadeIn 1s ease 0.2s forwards;
}

.hero-title {
  font-size: clamp(5rem, 16vw, 14rem);
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
  width: 100%;
  transform: scaleY(0.9);
  transform-origin: left bottom;
}

.hero-title span {
  display: block;
}

.hero-slogan {
  font-size: clamp(1.1rem, 2vw, 1.75rem);
  font-weight: 900;
  font-style: italic;
  color: var(--accent);
  max-width: 800px;
  line-height: 1.3;
  opacity: 0;
  animation: fadeIn 1s ease 1.2s forwards;
  transform: scaleY(0.82);
  transform-origin: left center;
}

/* ===== 底部常驻操作指引（decode hint） =====
   绝对定位于首屏底部居中，不参与文档流，不影响既有排版。
   注意：transform 用于居中，故障抖动只能施加在内部 .glitch-text 上，
   不能施加在容器本身（会覆盖 translateX(-50%)）。 */
.decode-hint {
  position: absolute;
  left: 50%;
  bottom: 2.5rem;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--accent);
  white-space: nowrap;
  opacity: 0;
  animation:
    fadeIn 1s ease 2.2s forwards,
    decodeHintFlicker 5s steps(1) 3.2s infinite;
}

.decode-hint-bracket {
  color: rgba(230, 230, 230, 0.55);
}

/* 光标块：持续闪烁，吸引视线 */
.decode-hint-cursor {
  width: 0.55em;
  height: 1em;
  background: var(--accent);
  animation: decodeHintCursor 1.1s steps(1) infinite;
}

@keyframes decodeHintCursor {
  0%, 55% { opacity: 1; }
  56%, 100% { opacity: 0; }
}

/* 低频率整体闪烁：大部分帧保持不透明，偶尔瞬时掉帧 */
@keyframes decodeHintFlicker {
  0%, 100% { opacity: 1; }
  7% { opacity: 0.35; }
  8% { opacity: 1; }
  9% { opacity: 0.5; }
  10% { opacity: 1; }
  46% { opacity: 1; }
  47% { opacity: 0.4; }
  48% { opacity: 1; }
  82% { opacity: 1; }
  83% { opacity: 0.55; }
  84% { opacity: 1; }
}

.hero-sidebar {
  position: absolute;
  right: 2.5rem;
  bottom: 20vh;
  z-index: 10;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.sidebar-text {
  display: flex;
  gap: 1.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: rgba(230, 230, 230, 0.6);
  opacity: 0;
  animation: fadeIn 1s ease 1.5s forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

/* ===== 故障文字效果（核心） ===== */
.glitch-text {
  position: relative;
  display: inline-block;
  /* 静态：无偏移、无裁剪，显示为纯荧光绿 */
  --glitch-offset-x: 0px;
  --glitch-offset-y: 0px;
  --glitch-after-x: 0px;
  --glitch-after-y: 0px;
  --main-clip: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  --glitch-clip: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  clip-path: var(--main-clip);
}

.glitch-text::before,
.glitch-text::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mix-blend-mode: normal;
  clip-path: var(--glitch-clip);
  opacity: 0;
  transition: opacity 0.1s ease;
}

/* 青色/蓝色通道 */
.glitch-text::before {
  color: var(--glitch-cyan);
  transform: translate(var(--glitch-offset-x), var(--glitch-offset-y));
}

/* 红色/橙色通道 */
.glitch-text::after {
  color: var(--glitch-red);
  transform: translate(var(--glitch-after-x), var(--glitch-after-y));
}

/* 故障动画状态（由 JS 触发） */
.glitch-text.is-glitching::before,
.glitch-text.is-glitching::after {
  opacity: 0.9;
}

/* 常驻细微故障：使用 text-shadow 实现轻微 RGB 色散，主文字颜色保持纯 #8AE744 */
.glitch-text.subtle-glitch {
  text-shadow:
    -1px 0 0 var(--glitch-cyan),
    1px 0 0 var(--glitch-red);
}

.glitch-text.subtle-glitch::before,
.glitch-text.subtle-glitch::after {
  opacity: 0;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .site-header {
    padding: 1rem 1.25rem;
  }

  .main-nav {
    display: none;
  }

  .hero-title {
    font-size: clamp(3rem, 15vw, 6rem);
  }

  .hero-sidebar {
    right: 1rem;
    bottom: 15vh;
  }
}

/* ===== 单页多视图 ===== */
.view {
  display: none;
}

.view.is-active {
  display: block;
}

/* ===== 页面转场动画 ===== */

/* 转场中隐藏元素 */
.is-transitioning .site-header,
.is-transitioning .hero-content,
.is-transitioning .hero-label,
.is-transitioning .hero-sidebar {
  pointer-events: none;
}

/* 元素解体消失动画（提升优先级，确保能覆盖 .about-title 等元素的入场动画） */
body .glitch-out {
  animation: glitchOut 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes glitchOut {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: none;
  }
  30% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: none;
  }
  60% {
    opacity: 0.9;
    transform: translateY(8px) scale(0.98);
  }
  100% {
    opacity: 0;
    transform: translateY(-30px) scale(0.92);
  }
}


/* ===== 首屏加载遮罩 ===== */
.boot-loader {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  transition: opacity 0.6s ease;
}

.boot-loader.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.boot-loader-text {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent);
  animation: bootLoaderBlink 1.2s steps(2, start) infinite;
}

.boot-loader-bar {
  width: 180px;
  height: 2px;
  background: var(--gray-900);
  overflow: hidden;
}

.boot-loader-bar-fill {
  display: block;
  width: 40%;
  height: 100%;
  background: var(--accent);
  animation: bootLoaderSlide 1.2s ease-in-out infinite;
}

@keyframes bootLoaderBlink {
  50% { opacity: 0.35; }
}

@keyframes bootLoaderSlide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(450%); }
}