@charset "UTF-8";

/* ========================================================
   春下虫二｜三秒越界者 THE THREE-SECOND CROSSER
   高阶视觉规范与全息动效系统 Tokens v2.0
   结合 world-class-designer 与 motion-web 专业规范
======================================================== */

:root {
  --paper: #F5F0E4;
  --paper-card: #FAF6ED;
  --forest: #073C31;
  --forest-dark: #032A23;
  --forest-light: #0C4E40;
  --ink: #101310;
  --red: #C72227;
  --red-glow: rgba(199, 34, 39, 0.45);
  --gold: #D6A62A;
  --gold-glow: rgba(214, 166, 42, 0.45);
  --ivory: #F8F2E5;
  --muted: #7A7974;

  --font-serif: "Cormorant Garamond", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  
  --nav-height-normal: 84px;
  --nav-height-sticky: 68px;

  --transition-smooth: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
  background-color: var(--paper);
}

/* 锚点留白 */
section[id] {
  scroll-margin-top: calc(var(--nav-height-sticky) + 16px);
}

/* 纸张与油墨底纹 */
.paper-texture {
  background-color: var(--paper);
  background-image: 
    radial-gradient(rgba(16, 19, 16, 0.05) 1px, transparent 0);
  background-size: 24px 24px;
}

/* 漫画网点背景 (Halftone Dots) */
.halftone-bg {
  background-image: radial-gradient(var(--forest) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: 0.08;
}

/* 颜色辅助类 */
.bg-paper { background-color: var(--paper); }
.bg-forest { background-color: var(--forest); }
.bg-forest-dark { background-color: var(--forest-dark); }
.bg-ink { background-color: var(--ink); }
.text-forest { color: var(--forest); }
.text-red-cross { color: var(--red); }
.text-gold-cross { color: var(--gold); }
.text-ivory { color: var(--ivory); }
.border-forest { border-color: var(--forest); }
.border-gold { border-color: var(--gold); }
.border-red { border-color: var(--red); }

/* ========================================================
   共用全站导航栏 (GlobalNavigation)
======================================================== */
.global-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height-normal);
  z-index: 60;
  background-color: var(--forest);
  border-bottom: 1px solid rgba(214, 166, 42, 0.28);
  box-shadow: 0 4px 24px rgba(3, 42, 35, 0.2);
  transition: height 0.35s cubic-bezier(0.16, 1, 0.3, 1), background 0.35s ease, box-shadow 0.35s ease;
}

.global-nav.nav-sticky {
  height: var(--nav-height-sticky);
  background-color: rgba(3, 42, 35, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(214, 166, 42, 0.5);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.nav-item-btn {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.15;
  color: var(--ivory);
  text-decoration: none;
  padding: 4px 10px;
  transition: var(--transition-fast);
}
.nav-item-btn .item-en {
  font-family: var(--font-serif);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  opacity: 0.82;
  transition: var(--transition-fast);
}
.nav-item-btn .item-zh {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  transition: var(--transition-fast);
}
.nav-item-btn:hover .item-en,
.nav-item-btn.active .item-en {
  color: var(--gold);
  opacity: 1;
}
.nav-item-btn:hover .item-zh,
.nav-item-btn.active .item-zh {
  color: #FFFFFF;
}
.nav-item-btn::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 22px;
  height: 2px;
  background-color: var(--gold);
  border-radius: 2px;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-item-btn.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* ========================================================
   红黄越界转场轨迹动效 (Crossing Transition)
======================================================== */
.crossing-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  overflow: hidden;
  display: none;
}
.crossing-overlay.active {
  display: block;
}

.crossing-laser-red {
  position: absolute;
  top: 0;
  left: -120%;
  width: 140%;
  height: 100%;
  background: linear-gradient(105deg, transparent 40%, rgba(199, 34, 39, 0.95) 50%, rgba(199, 34, 39, 0.3) 65%, transparent 70%);
  transform: skewX(-20deg);
  animation: laserCrossRed 0.65s cubic-bezier(0.7, 0, 0.3, 1) forwards;
}

.crossing-laser-yellow {
  position: absolute;
  top: 0;
  left: -120%;
  width: 140%;
  height: 100%;
  background: linear-gradient(105deg, transparent 45%, rgba(214, 166, 42, 0.9) 55%, rgba(214, 166, 42, 0.2) 70%, transparent 75%);
  transform: skewX(-15deg);
  animation: laserCrossYellow 0.75s 0.1s cubic-bezier(0.7, 0, 0.3, 1) forwards;
}

@keyframes laserCrossRed {
  0% { left: -140%; }
  100% { left: 140%; }
}
@keyframes laserCrossYellow {
  0% { left: -140%; }
  100% { left: 140%; }
}

/* ========================================================
   【核心升级：真实 3D 倾斜、全息镭射流动与正反翻面系统】
======================================================== */
.card-3d-scene {
  perspective: 1400px;
  transform-style: preserve-3d;
}

.card-3d-flipper {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 4.5;
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: transform;
}

/* 翻面 180 度 */
.card-3d-flipper.is-flipped {
  transform: rotateY(180deg) !important;
}

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 1.25rem;
  overflow: hidden;
  transform-style: preserve-3d;
  box-shadow: 0 12px 30px rgba(3, 42, 35, 0.18);
  transition: box-shadow 0.4s ease;
}

.card-face-front {
  transform: rotateY(0deg);
  z-index: 2;
}

.card-face-back {
  transform: rotateY(180deg);
  z-index: 1;
}

/* 全息镭射高光流动层 (Holographic Rainbow Foil) */
.holo-foil-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background-image: linear-gradient(
    calc(115deg + var(--pointer-x, 50%)),
    transparent 15%,
    rgba(255, 90, 90, 0.45) 26%,
    rgba(255, 210, 80, 0.55) 38%,
    rgba(80, 255, 180, 0.5) 50%,
    rgba(90, 180, 255, 0.55) 65%,
    rgba(210, 100, 255, 0.45) 78%,
    transparent 90%
  );
  background-size: 220% 220%;
  background-position: calc(var(--pointer-x, 50%) * 1.5) calc(var(--pointer-y, 50%) * 1.5);
  mix-blend-mode: color-dodge;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 10;
}

/* 随鼠标移动的镜面光斑 (Specular Light) */
.holo-specular-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background: radial-gradient(
    circle at var(--pointer-x, 50%) var(--pointer-y, 50%),
    rgba(255, 255, 255, 0.8) 0%,
    rgba(255, 255, 255, 0.25) 32%,
    transparent 68%
  );
  mix-blend-mode: overlay;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 11;
}

/* 星芒闪烁层 (Holo Sparkles) */
.holo-sparkle-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background-image: radial-gradient(rgba(255, 255, 255, 0.85) 1.2px, transparent 1.2px);
  background-size: 16px 16px;
  background-position: calc(var(--pointer-x, 50%) * 0.5) calc(var(--pointer-y, 50%) * 0.5);
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 12;
}

.card-face:hover .holo-foil-layer,
.card-face:hover .holo-specular-layer,
.card-face:hover .holo-sparkle-layer {
  opacity: 0.92;
}

/* ========================================================
   印章与盖章动效 (Stamp Animation)
======================================================== */
@keyframes stampIn {
  0% {
    transform: scale(2.4) rotate(-28deg);
    opacity: 0;
  }
  65% {
    transform: scale(0.92) rotate(-8deg);
    opacity: 1;
  }
  100% {
    transform: scale(1) rotate(-12deg);
    opacity: 1;
  }
}

.stamp-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--red);
  color: var(--red);
  font-family: var(--font-serif);
  font-weight: bold;
  letter-spacing: 0.15em;
  padding: 4px 10px;
  border-radius: 4px;
  transform: rotate(-8deg);
}

.stamp-active {
  animation: stampIn 0.5s cubic-bezier(0.18, 0.89, 0.32, 1.28) forwards;
}

/* ========================================================
   3D 骰子转动动画 (Dice Animation)
======================================================== */
@keyframes diceRoll {
  0% { transform: rotateX(0deg) rotateY(0deg) scale(1); }
  25% { transform: rotateX(180deg) rotateY(270deg) scale(1.15); }
  50% { transform: rotateX(360deg) rotateY(540deg) scale(0.95); }
  75% { transform: rotateX(540deg) rotateY(720deg) scale(1.1); }
  100% { transform: rotateX(720deg) rotateY(900deg) scale(1); }
}

.dice-rolling {
  animation: diceRoll 1s cubic-bezier(0.2, 0.8, 0.3, 1) forwards;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: var(--paper);
}
::-webkit-scrollbar-thumb {
  background: rgba(7, 60, 49, 0.4);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--forest);
}