/* 合作方式：左边六步，右边舞台 sticky，滚动推进；手机上舞台在上、六个步骤标签在下，自动推进。 */
#process { --process-cap: 40px; border-top: 1px solid var(--line); }
#process .process-head { max-width: 30em; }
#process .process-head .hl-lead { font-size: 17px; line-height: 1.8; }

#process .pc-grid { display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); column-gap: 48px; }
/* 1280 左右：左栏收窄一点，把宽度让给舞台，舞台里最小的字才能保持 12px 以上 */
@media (min-width: 901px) and (max-width: 1360px) {
  #process .pc-grid { grid-template-columns: minmax(0, 300px) minmax(0, 1fr); column-gap: 36px; }
}

/* ---- 左栏：六步 ---- */
#process .pc-steps { list-style: none; margin: 64px 0 0; padding: 0; }
#process .pc-step { position: relative; min-height: 26vh; padding-left: 26px; }
#process .pc-step:last-child { min-height: calc(96vh - 24px); }
#process .pc-bar { position: absolute; left: 0; top: 6px; bottom: 6px; width: 2px; border-radius: 1px; background: var(--line); overflow: hidden; }
#process .pc-step:last-child .pc-bar { bottom: auto; height: calc(26vh - 12px); }
#process .pc-bar i { display: block; width: 100%; height: 100%; background: var(--amber); transform-origin: top; transform: scaleY(var(--p, 0)); }
#process .pc-step.is-done .pc-bar i { background: var(--ink-4); }

#process .pc-step button { display: flex; flex-direction: column; align-items: flex-start; width: 100%; padding: 0 0 24px; border: 0; background: none;
  text-align: left; cursor: pointer; color: inherit; }
#process .process-n { font-size: 13px; color: var(--ink-4); font-variant-numeric: tabular-nums; transition: color .25s var(--ease); }
#process .process-t { margin-top: 4px; font-size: 19px; font-weight: 620; line-height: 1.4; color: var(--ink-2); transition: color .25s var(--ease); }
#process .pc-short { display: none; }
#process .process-d { margin-top: 10px; font-size: 15px; line-height: 1.75; color: var(--ink-3); transition: color .25s var(--ease); }
#process .process-out { margin-top: 12px; font-size: 14px; line-height: 1.6; color: var(--ink-3); transition: color .25s var(--ease); }
#process .process-out em { font-style: normal; font-size: 13px; color: var(--ink-4); margin-right: 10px; }

#process .pc-step.is-now .process-n { color: var(--amber); }
#process .pc-step.is-now .process-t { color: var(--ink-1); }
#process .pc-step.is-now .process-d { color: var(--ink-2); }
#process .pc-step.is-now .process-out { color: var(--ink-1); }
#process .pc-step.is-now .process-out em { color: var(--ink-3); }
#process .pc-step.is-done .process-t { color: var(--ink-3); }
#process .pc-step.is-done .process-d, #process .pc-step.is-done .process-out,
#process .pc-step.is-done .process-out em { color: var(--ink-4); }
#process .pc-step button:hover .process-t { color: var(--ink-1); }
#process .pc-step button:active { transform: translateY(1px); }
#process .pc-step button:focus-visible { outline-offset: 6px; }

/* ---- 右栏：舞台 ---- */
#process .pc-sticky { position: sticky; top: calc(var(--nav-h) + 24px); height: calc(100vh - var(--nav-h) - 48px); min-height: 520px;
  display: flex; flex-direction: column; }
#process .pc-cap { flex: none; height: var(--process-cap); display: flex; align-items: center; justify-content: space-between; gap: 16px; }
#process .pc-cap p { font-size: var(--fs-label); color: var(--ink-3); letter-spacing: .02em; }
#process .pc-box { position: relative; flex: 1; min-height: 0; }
#process .pc-canvas { position: absolute; inset: 0; width: 100%; height: 100%; transition: opacity .4s var(--ease); }
#process .pc-canvas.is-fading { opacity: 0; }

#process .pc-pause { flex: none; width: 40px; height: 40px; border-radius: var(--r-btn); border: 1px solid var(--line-strong); background: transparent;
  display: grid; place-items: center; cursor: pointer; transition: border-color .2s var(--ease); }
#process .pc-pause:hover { border-color: var(--ink-3); }
#process .pc-pause:active { transform: translateY(1px); }
#process .pc-pause svg { width: 14px; height: 14px; fill: var(--ink-2); }
#process .pc-pause .i-play { display: none; }
#process .pc-pause[aria-pressed="true"] .i-play { display: block; }
#process .pc-pause[aria-pressed="true"] .i-pause { display: none; }

#process .pc-detail { display: none; }

/* ---- 手机：舞台在上，六个步骤标签两行排，下面是当前步的说明 ---- */
@media (max-width: 900px) {
  #process .pc-grid { display: flex; flex-direction: column; }
  #process .pc-left { display: contents; }
  #process .process-head { order: 0; }
  #process .process-head .hl-lead { font-size: 16px; }
  #process .pc-right { order: 1; margin-top: 28px; }
  #process .pc-sticky { position: static; height: auto; min-height: 0; display: block; }
  #process .pc-cap p { font-size: 12px; }
  #process .pc-box { height: min(calc((100vw - var(--pad) * 2) * 1.725), 70svh); }

  #process .pc-steps { order: 2; margin: 10px 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2px 8px; }
  #process .pc-step, #process .pc-step:last-child { min-height: 0; padding: 0; }
  #process .pc-bar, #process .pc-step:last-child .pc-bar { position: static; display: block; width: auto; height: 2px; }
  #process .pc-bar i { transform-origin: left; transform: scaleX(var(--p, 0)); }
  #process .pc-step button { flex-direction: row; align-items: baseline; gap: 6px; min-height: 44px; padding: 10px 0 8px; }
  #process .process-n { font-size: 12px; }
  #process .process-t { margin: 0; font-size: 14px; font-weight: 560; white-space: nowrap; }
  #process .pc-long { display: none; }
  #process .pc-short { display: inline; }
  #process .pc-step .process-d, #process .pc-step .process-out { display: none; }
  #process .pc-step.is-done .process-t { color: var(--ink-3); }

  #process .pc-detail { display: block; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); min-height: 7.5em; }
  #process .pc-detail .process-d { margin: 0; color: var(--ink-2); }
  #process .pc-detail .process-out { margin-top: 8px; color: var(--ink-1); }
  #process .pc-detail .process-out em { color: var(--ink-3); }
}

@media (prefers-reduced-motion: reduce) {
  #process .process-n, #process .process-t, #process .process-d, #process .process-out, #process .pc-canvas { transition: none; }
}