/* 环形转盘导航：八个栏目挂在一个 340px 的圆周上。
   布点靠三角函数：每个 <li> 的角度是 360°/n × 序号 − 90°（从正上方起算），
   translate: cos(a)×170px  sin(a)×170px 把它送到圆周对应的位置上。
   转盘只转一个自定义属性 --rot（CSS transition 负责动画），按钮再乘 −1 反向转，
   字面永远朝上。配色全是 oklch()：暖色暗底配一支橘红高亮。 */

.ccm-11,
.ccm-11 *,
.ccm-11 *::before,
.ccm-11 *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.ccm-11 {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 30%,oklch(0.28 0.02 20),oklch(0.18 0.015 15) 70%);
  --brand: oklch(0.72 0.19 25);
  --ink: oklch(0.93 0.005 25);
  font-family: 'Segoe UI',system-ui,sans-serif;
  color: var(--ink);
}

.ccm-11__stage {
  width: 100%;
  height: 100vh;
  position: relative;
  display: grid;
  place-items: center;
  border-radius: 20px;
  background: radial-gradient(circle at 50% 30%,oklch(0.28 0.02 20),oklch(0.18 0.015 15) 70%);
  overflow: hidden;
}

/* 顶部指针：转盘把选中的栏目转到它正下方 */
.ccm-11__pointer {
  position: absolute;
  left: 50%;
  top: calc(50% - 196px);
  translate: -50% 0;
  width: 0;
  height: 0;
  border: 9px solid transparent;
  border-top: 13px solid var(--brand);
  filter: drop-shadow(0 2px 6px oklch(0.72 0.19 25 / .6));
  z-index: 3;
}

.ccm-11__machine {
  position: relative;
  width: 340px;
  height: 340px;
  display: grid;
  place-items: center;
}

.ccm-11__wheel {
  position: absolute;
  inset: 0;
  list-style: none;
  border-radius: 50%;
  border: 1px solid oklch(0.5 0.05 25 / .4);
  rotate: var(--rot,0deg);
  transition: rotate .7s cubic-bezier(.3,1,.35,1);
}

.ccm-11__wheel li {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  --a: calc((360deg / var(--n)) * var(--i) - 90deg);
  translate: calc(cos(var(--a)) * 170px) calc(sin(var(--a)) * 170px);
}

/* 按钮始终反向转（JS 每次同步 style.rotate），保证文字不倒 */
.ccm-11__stop {
  pointer-events: auto;
  border: 1px solid oklch(0.5 0.05 25 / .5);
  border-radius: 999px;
  padding: 9px 16px;
  background: oklch(0.26 0.02 20 / .85);
  color: oklch(0.8 0.02 25);
  font: 600 13px/1 'Segoe UI',system-ui,sans-serif;
  letter-spacing: .02em;
  cursor: pointer;
  white-space: nowrap;
  rotate: calc(var(--rot,0deg) * -1);
  transition: rotate .7s cubic-bezier(.3,1,.35,1),background .25s,color .25s,border-color .25s,scale .25s;
}

.ccm-11__stop:hover {
  border-color: var(--brand);
  color: #fff;
}

.ccm-11__stop:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 3px;
}

.ccm-11__stop.is-active {
  background: var(--brand);
  border-color: var(--brand);
  color: oklch(0.2 0.03 25);
  scale: 1.12;
  box-shadow: 0 0 24px -4px oklch(0.72 0.19 25 / .7);
}

/* 中心表盘：实时显示当前栏目，附上一对左右转向按钮 */
.ccm-11__face {
  position: relative;
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: 4px;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  place-content: center;
  text-align: center;
  background: radial-gradient(circle at 38% 30%,oklch(0.3 0.02 20),oklch(0.21 0.015 15));
  border: 1px solid oklch(0.5 0.05 25 / .4);
  box-shadow: inset 0 1px 0 oklch(1 0 0 / .1),0 20px 50px -20px oklch(0 0 0 / .8);
}

.ccm-11__face em {
  font-style: normal;
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: oklch(0.62 0.04 25);
}

.ccm-11__current {
  font-size: 25px;
  letter-spacing: -.01em;
}

.ccm-11__steer {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.ccm-11__steer button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid oklch(0.5 0.05 25 / .5);
  background: oklch(0.28 0.02 20);
  color: var(--ink);
  font-size: 15px;
  cursor: pointer;
  transition: background .2s,border-color .2s;
}

.ccm-11__steer button:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: oklch(0.2 0.03 25);
}

.ccm-11__steer button:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
}

/* 给读屏用的播报位，视觉上藏起来 */
.ccm-11__live {
  position: absolute;
  width: 1px;
  height: 1px;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  .ccm-11 * {
    transition-duration: .01s !important;
  }
}