/* ==========================================================================
   MEMPHIS DESIGN SYSTEM (孟菲斯先锋潮流波普视觉系统)
   高饱和撞色 · 黑色粗边框 · 硬朗位移投影 · 几何符号 · 弹簧阻尼微动效
   ========================================================================== */

:root {
  /* 孟菲斯经典高饱和色彩 (建议比例: 60%主色、30%辅助色、10%点缀色) */
  --m-pink: #FF5E89;
  --m-yellow: #FFE600;
  --m-blue: #00E5FF;
  --m-green: #00F5A0;
  --m-purple: #9D4EDD;
  --m-orange: #FF7B00;

  /* 中和色彩 */
  --m-bg: #FFFDF0;
  --m-surface: #FFFFFF;
  --m-surface-dark: #121214;
  --m-black: #000000;
  --m-white: #FFFFFF;
  --m-gray-light: #F4F3ED;
  --m-gray-text: #333333;

  /* 边框与投影规范 */
  --m-border-width: 3px;
  --m-border-width-lg: 4px;
  --m-border: var(--m-border-width) solid var(--m-black);
  --m-border-lg: var(--m-border-width-lg) solid var(--m-black);

  /* 硬朗重投影规范 (Neo-Brutalism & Memphis hard shadows) */
  --m-shadow-sm: 3px 3px 0px #000;
  --m-shadow: 6px 6px 0px #000;
  --m-shadow-lg: 10px 10px 0px #000;
  --m-shadow-xl: 14px 14px 0px #000;
  box-shadow: 6px 6px 0px #000;

  /* 物理弹簧缓动 */
  --m-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --m-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background-color: var(--m-bg);
  color: var(--m-black);
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--m-bg);
  /* 孟菲斯微波点背景纹理 */
  background-image: radial-gradient(rgba(0, 0, 0, 0.08) 15%, transparent 15%);
  background-size: 24px 24px;
}

/* 容器 */
.m-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 孟菲斯卡片系统 */
.m-card {
  background: var(--m-surface);
  border: var(--m-border-lg);
  border-radius: 20px;
  box-shadow: var(--m-shadow);
  transition: transform 0.2s var(--m-spring), box-shadow 0.2s ease;
  position: relative;
}

.m-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--m-shadow-lg);
}

/* 孟菲斯按钮按压立体下陷动效 (m-btn-press) */
.m-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-weight: 800;
  font-size: 1rem;
  border: var(--m-border);
  border-radius: 12px;
  box-shadow: var(--m-shadow-sm);
  cursor: pointer;
  text-decoration: none;
  user-select: none;
  transition: all 0.12s var(--m-spring);
  color: var(--m-black);
}

.m-btn-press:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--m-shadow);
}

.m-btn-press:active {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0px #000;
}

/* 按钮变体 */
.m-btn-primary {
  background: var(--m-pink);
  color: #000;
}
.m-btn-primary:hover {
  background: #ff4777;
}

.m-btn-yellow {
  background: var(--m-yellow);
}
.m-btn-yellow:hover {
  background: #ffd000;
}

.m-btn-green {
  background: var(--m-green);
}
.m-btn-green:hover {
  background: #00dc8c;
}

.m-btn-blue {
  background: var(--m-blue);
}
.m-btn-blue:hover {
  background: #00cae6;
}

.m-btn-white {
  background: #fff;
}
.m-btn-white:hover {
  background: var(--m-gray-light);
}

/* 徽标胶囊与贴纸 (Stickers & Badges) */
.m-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-weight: 900;
  font-size: 0.8rem;
  border: var(--m-border);
  border-radius: 8px;
  box-shadow: var(--m-shadow-sm);
  text-transform: uppercase;
}

.m-sticker {
  display: inline-block;
  padding: 4px 12px;
  font-weight: 900;
  font-size: 0.85rem;
  border: var(--m-border);
  box-shadow: var(--m-shadow-sm);
  transform: rotate(-2deg);
}

/* 几何装饰图形 */
.m-shape-triangle {
  width: 0;
  height: 0;
  border-left: 25px solid transparent;
  border-right: 25px solid transparent;
  border-bottom: 45px solid var(--m-pink);
  filter: drop-shadow(4px 4px 0px #000);
  animation: m-float 5s ease-in-out infinite alternate;
}

.m-shape-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: var(--m-border-lg);
  background: var(--m-yellow);
  box-shadow: var(--m-shadow);
}

.m-pattern-dots {
  background-image: radial-gradient(var(--m-black) 20%, transparent 20%);
  background-size: 10px 10px;
  opacity: 0.25;
}

.m-pattern-stripes {
  background: repeating-linear-gradient(
    45deg,
    var(--m-yellow),
    var(--m-yellow) 10px,
    var(--m-black) 10px,
    var(--m-black) 14px
  );
}

/* 跳动波浪直方图 (Memphis Wave Strip) */
.m-wave-strip {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 54px;
  padding: 8px;
  background: #FFFDF0;
  border: var(--m-border);
  border-radius: 12px;
  box-shadow: var(--m-shadow-sm);
}

.m-wave-bar {
  flex: 1;
  background: var(--m-blue);
  border: 1.5px solid var(--m-black);
  border-radius: 4px 4px 0 0;
  animation: m-jump 0.8s infinite alternate ease-in-out;
}
.m-wave-bar:nth-child(even) { background: var(--m-pink); animation-delay: 0.15s; }
.m-wave-bar:nth-child(3n) { background: var(--m-yellow); animation-delay: 0.3s; }
.m-wave-bar:nth-child(4n) { background: var(--m-green); animation-delay: 0.45s; }

/* 关键帧动画 */
@keyframes m-jump {
  0% { height: 18%; }
  100% { height: 98%; }
}

@keyframes m-float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(8deg); }
  100% { transform: translateY(4px) rotate(-6deg); }
}

@keyframes m-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* 响应式断点 */
@media (max-width: 768px) {
  :root {
    --m-border-width: 2.5px;
    --m-border-width-lg: 3px;
    --m-shadow-sm: 2px 2px 0px #000;
    --m-shadow: 4px 4px 0px #000;
    --m-shadow-lg: 6px 6px 0px #000;
  }

  .m-container {
    padding: 0 1rem;
  }

  .m-stage-card {
    padding: 1.25rem !important;
  }

  .m-stage-grid {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }

  .m-ecosystem-track {
    grid-template-columns: 1fr !important;
  }
}

/* 尊重减少动态选项 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}