/* ============================================
   基础样式 / 全局变量
   ============================================ */
:root {
  --c-paper: #f0e6d2;
  --c-paper-light: #f8f0dc;
  --c-paper-dark: #e0d2b4;
  --c-ink: #2a1f0f;
  --c-ink-light: #5a4a2f;
  --c-ink-muted: #8a7a5f;
  --c-gold: #c9a96e;
  --c-gold-light: #e8b85e;
  --c-gold-dark: #a08550;
  --c-seal: #b8453e;

  --font-kai: 'STKaiti', 'KaiTi', '楷体', serif;
  --font-song: 'STSong', 'SimSun', '宋体', serif;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-kai);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  position: relative;
}

/* ============================================
   隐藏 UI 模式（按 J 切换）
   保留场景背景、视频、奇物标签——只隐藏按钮、信息条、印章等界面元素
   ============================================ */
body.ui-hidden .scene-info,
body.ui-hidden .next-scene-btn,
body.ui-hidden .skip-btn,
body.ui-hidden .audio-toggle,
body.ui-hidden .hero-content,
body.ui-hidden .hero-seal,
body.ui-hidden .ending-content,
body.ui-hidden .ending-seal,
body.ui-hidden .atlas-close,
body.ui-hidden .atlas-header {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

/* ============================================
   页面切换
   ============================================ */
.page {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease, visibility 0.8s;
  z-index: 1;
}

.page.page-active {
  opacity: 1;
  visibility: visible;
  z-index: 10;
}

/* ============================================
   全屏视频
   ============================================ */
.full-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: var(--c-paper);
}

.skip-btn {
  position: absolute;
  bottom: 40px;
  right: 40px;
  padding: 10px 24px;
  background: rgba(245, 235, 215, 0.85);
  border: 1px solid var(--c-gold);
  color: var(--c-ink);
  font-family: var(--font-kai);
  font-size: 14px;
  letter-spacing: 4px;
  cursor: pointer;
  z-index: 100;
  transition: all 0.3s;
  backdrop-filter: blur(4px);
}

.skip-btn:hover {
  background: var(--c-paper-light);
  border-color: var(--c-gold-light);
  box-shadow: 0 0 10px rgba(201, 169, 110, 0.5);
}

/* ============================================
   雾气浮动层（通用）
   ============================================ */
.mist-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: screen;
  z-index: 2;
}

.mist-1 {
  background: radial-gradient(ellipse 80% 50% at 30% 40%,
    rgba(255, 250, 240, 0.25) 0%,
    transparent 70%);
  animation: mistDrift1 25s ease-in-out infinite;
}

.mist-2 {
  background: radial-gradient(ellipse 60% 40% at 70% 60%,
    rgba(245, 235, 215, 0.2) 0%,
    transparent 65%);
  animation: mistDrift2 30s ease-in-out infinite;
}

@keyframes mistDrift1 {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.6; }
  33%      { transform: translate(30px, -20px) scale(1.1); opacity: 1; }
  66%      { transform: translate(-20px, 25px) scale(0.95); opacity: 0.8; }
}

@keyframes mistDrift2 {
  0%, 100% { transform: translate(0, 0); opacity: 0.5; }
  50%      { transform: translate(-40px, 30px); opacity: 0.9; }
}

/* ============================================
   滚动条隐藏
   ============================================ */
::-webkit-scrollbar { display: none; }
* { scrollbar-width: none; }