/* ============================================================
 * EmbedAI 站点共享交互样式
 * - 自定义光标
 * - 磁吸过渡
 * - 3D 倾斜 perspective
 * - 滚动揭示
 * - 涟漪点击
 * - 页面入场
 * - 进度条 / 回到顶部
 * - 通用 :root 变量
 * ============================================================ */

/* -------- 自定义光标 -------- */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 9999;
  border-radius: 50%;
  transform: translate3d(-50%, -50%, 0);
  will-change: transform;
  mix-blend-mode: difference;
}

.cursor-dot {
  width: 6px;
  height: 6px;
  background: #fff;
  transition: width 0.2s ease, height 0.2s ease, background 0.2s ease;
}

.cursor-ring {
  width: 36px;
  height: 36px;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  transition: width 0.25s ease, height 0.25s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.cursor-ring.is-hover {
  width: 56px;
  height: 56px;
  border-color: rgba(165, 180, 252, 0.95);
}

.cursor-dot.is-hover {
  width: 4px;
  height: 4px;
}

body.cursor-hidden .cursor-dot,
body.cursor-hidden .cursor-ring {
  opacity: 0;
}

/* 在不支持精细指针的设备上隐藏自定义光标 */
@media (hover: none), (pointer: coarse) {
  .cursor-dot,
  .cursor-ring {
    display: none;
  }
}

/* -------- 磁吸按钮 -------- */
[data-magnetic] {
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: transform;
}

/* -------- 3D 倾斜 -------- */
.tilt-stage {
  perspective: 1000px;
}

[data-tilt] {
  transform-style: preserve-3d;
  transform: perspective(1000px) rotateX(0deg) rotateY(0deg);
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.3s ease;
  will-change: transform;
}

[data-tilt] .tilt-inner {
  transform: translateZ(20px);
}

/* -------- 滚动揭示 -------- */
[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition: opacity 0.7s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
  will-change: opacity, transform;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

[data-reveal][data-reveal="left"] { transform: translate3d(-32px, 0, 0); }
[data-reveal][data-reveal="right"] { transform: translate3d(32px, 0, 0); }
[data-reveal][data-reveal="fade"] { transform: translate3d(0, 0, 0); }
[data-reveal][data-reveal="scale"] { transform: scale(0.92); }
[data-reveal][data-reveal="scale"].is-revealed { transform: scale(1); }

/* 错位延迟 */
[data-reveal-delay="1"] { transition-delay: 0.06s; }
[data-reveal-delay="2"] { transition-delay: 0.12s; }
[data-reveal-delay="3"] { transition-delay: 0.18s; }
[data-reveal-delay="4"] { transition-delay: 0.24s; }
[data-reveal-delay="5"] { transition-delay: 0.30s; }
[data-reveal-delay="6"] { transition-delay: 0.36s; }

/* -------- 点击涟漪 -------- */
.ripple-host {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  pointer-events: none;
  background: currentColor;
  opacity: 0.35;
  animation: ripple-expand 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  z-index: 0;
}

@keyframes ripple-expand {
  to {
    transform: translate(-50%, -50%) scale(2.4);
    opacity: 0;
  }
}

/* -------- 进度条 / 回到顶部 -------- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, #667eea, #a5b4fc, #f093fb);
  z-index: 9998;
  transition: width 0.05s linear;
  pointer-events: none;
}

.to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(26, 26, 31, 0.85);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease;
  z-index: 9997;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.to-top:hover {
  background: #667eea;
}

.to-top:focus-visible {
  outline: 2px solid #a5b4fc;
  outline-offset: 2px;
}

/* -------- 页面入场 -------- */
body {
  opacity: 0;
  transition: opacity 0.5s ease;
}

body.is-ready {
  opacity: 1;
}

/* -------- 装饰小图标入场 -------- */
.fade-in-up {
  animation: fade-in-up 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translate3d(0, 16px, 0); }
  to   { opacity: 1; transform: translate3d(0, 0, 0); }
}

/* 角色字符逐字入场 */
[data-char] {
  display: inline-block;
  opacity: 0;
  transform: translate3d(0, 0.4em, 0);
  animation: char-in 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes char-in {
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}

/* 打字机光标 */
.typed-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  vertical-align: -2px;
  margin-left: 2px;
  background: currentColor;
  animation: typed-blink 1s steps(2) infinite;
}

@keyframes typed-blink {
  50% { opacity: 0; }
}

/* 数值计数器 */
.count-up {
  font-variant-numeric: tabular-nums;
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  body { opacity: 1; }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .cursor-dot,
  .cursor-ring {
    display: none;
  }
}