/* issue 221 場景 solution-arch-flow：三層控制架構的流程動畫（HTML 排版，文字隨寬度重排，不靠縮放圖片）。
   外層是白色卡片（不受區段底色影響），裡面是深色舞台：寬螢幕（>= 62rem）每段三欄、步驟橫排加向右箭頭；窄螢幕直排卡片、步驟向下箭頭。
   顏色只讀官網 token（強調用 --notice-accent、亮藍用 --soft）。沒有 JS 或減少動態時全部完整顯示；淡化、轉場與動畫全部在檔案最後的 no-preference 區塊內，並由 JS 加上的 run 類別啟動。 */
.page-blocks .fl { display: grid; gap: .9rem; min-width: 0; padding: clamp(.75rem, 2vw, 1rem); border: 1px solid var(--line); border-radius: var(--radius-xl); background: var(--paper); color: var(--ink); box-shadow: var(--elevation-card); }
.page-blocks .fl > * { min-width: 0; }
.page-blocks .fl-bar { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem .6rem; }
.page-blocks .fl-badge { padding: .3rem .8rem; border-radius: var(--r-pill); background: var(--navy); color: var(--paper); font-size: .8125rem; font-weight: 700; }
.page-blocks .fl-btn { all: unset; box-sizing: border-box; display: inline-flex; align-items: center; min-height: 2.75rem; padding: .45rem 1.1rem; border: 1px solid var(--line); border-radius: var(--r-pill); background: var(--paper); color: var(--ink); font-size: .9375rem; font-weight: 700; cursor: pointer; }
.page-blocks .fl-btn[hidden] { display: none; }
.page-blocks .fl-btn:hover { border-color: var(--ink); }
.page-blocks .fl-btn:focus-visible { outline: 3px solid var(--cloudforce-blue); outline-offset: 2px; }
.page-blocks .fl-arch { padding: clamp(1.1rem, 3vw, 2.2rem); border-radius: var(--radius-l); background: linear-gradient(135deg, var(--navy), var(--deeper)); color: var(--paper); }
.page-blocks .fl-arch > * { min-width: 0; }
.page-blocks .fl-grp { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem .8rem; margin: 0 0 .8rem; color: var(--muted-on-dark); font-size: .9375rem; text-wrap: pretty; }
.page-blocks .fl-grp span { padding: .2rem .9rem; border: 1px solid var(--soft); border-radius: var(--r-pill); background: color-mix(in srgb, var(--soft) 12%, transparent); color: var(--soft); font-weight: 800; }
.page-blocks .fl-cn + .fl-grp { margin-top: -.2rem; }
.page-blocks .fl-stg { display: grid; gap: 1.1rem; padding: 1.2rem; border: 1px solid var(--on-dark-line); border-radius: var(--radius-l); background: color-mix(in srgb, var(--paper) 4%, transparent); }
.page-blocks .fl-who { display: grid; grid-template-columns: auto 1fr; align-items: center; column-gap: .9rem; }
.page-blocks .fl-badge-ic { grid-row: span 2; display: grid; place-items: center; width: 3.6rem; height: 3.6rem; border: 2px solid var(--cloudforce-blue); border-radius: 50%; background: color-mix(in srgb, var(--cloudforce-blue) 12%, transparent); }
.page-blocks .fl-badge-ic .fl-ic { width: 2rem; height: 2rem; }
.page-blocks .fl-who:not(:has(.fl-badge-ic)) { grid-template-columns: 1fr; }
.page-blocks .fl-num { margin: 0; color: var(--soft); font-size: 1.7rem; font-weight: 800; line-height: 1; }
.page-blocks .fl-part { margin: 0; color: var(--paper); font-size: 1.1rem; font-weight: 800; }
.page-blocks .fl .fl-h { grid-column: 1 / -1; margin: .9rem 0 .2rem; color: var(--paper); font-size: 1.5rem; font-weight: 800; line-height: 1.3; }
.page-blocks .fl-cap { grid-column: 1 / -1; margin: 0; color: var(--soft); font-weight: 600; line-height: 1.5; }
.page-blocks .fl-why { margin: 0 0 1rem; color: var(--muted-on-dark); line-height: 1.75; }
.page-blocks .fl-ic { flex: none; width: 1.6rem; height: 1.6rem; fill: none; stroke: var(--soft); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.page-blocks .fl-steps { display: grid; gap: 1.6rem; margin: 0; padding: 0; list-style: none; }
.page-blocks .fl-st { position: relative; display: flex; align-items: center; gap: .8rem; padding: .85rem 1rem; border: 1px solid var(--on-dark-line); border-radius: .8rem; background: color-mix(in srgb, var(--paper) 3%, transparent); }
.page-blocks .fl-st b { display: block; font-size: 1.0625rem; line-height: 1.4; }
.page-blocks .fl-st small { display: block; margin-top: .15rem; color: var(--muted-on-dark); font-size: .875rem; line-height: 1.5; }
.page-blocks .fl-st--end { border-color: var(--notice-accent); }
.page-blocks .fl-st--end .fl-ic { stroke: var(--notice-accent); }
.page-blocks .fl-st + .fl-st::before { content: ""; position: absolute; left: 50%; top: -1.35rem; width: 0; height: 0; border: .42rem solid transparent; border-top: .55rem solid var(--soft); transform: translateX(-50%); }
.page-blocks .fl-fx { position: absolute; right: .8rem; top: -.9rem; max-width: calc(100% - 1.6rem); padding: .18rem .75rem; border-radius: var(--r-pill); background: var(--notice-accent); color: var(--deeper); font-size: .8125rem; font-weight: 800; line-height: 1.4; }
.page-blocks .fl-nt { display: flex; align-items: center; gap: .55rem; margin: 1rem 0 0; padding: .7rem .9rem; border: 1px dashed var(--on-dark-line); border-radius: .8rem; font-size: .9375rem; line-height: 1.55; }
.page-blocks .fl-why + .fl-nt, .page-blocks .fl-mid > .fl-nt:first-child { margin-top: 0; }
.page-blocks .fl-nt .fl-ic { width: 1.15rem; height: 1.15rem; stroke: var(--notice-accent); }
.page-blocks .fl-it { padding: 1rem 1.1rem; border: 1px dashed var(--on-dark-line); border-radius: .9rem; }
.page-blocks .fl-it-h { margin: 0 0 .6rem; color: var(--soft); font-size: 1rem; font-weight: 800; }
.page-blocks .fl-it ul { display: grid; gap: .55rem; margin: 0; padding: 0; list-style: none; }
.page-blocks .fl-it li { position: relative; padding-left: 1.1rem; font-size: .9375rem; line-height: 1.5; }
.page-blocks .fl-it li::before { content: ""; position: absolute; left: 0; top: .55em; width: .45rem; height: .45rem; border-radius: 50%; background: var(--notice-accent); }
.page-blocks .fl-cn { position: relative; display: flex; align-items: center; justify-content: center; gap: .8rem; height: 4.2rem; }
.page-blocks .fl-cn i { position: relative; align-self: stretch; width: 2px; background: var(--notice-accent); }
.page-blocks .fl-cn i::after { content: ""; position: absolute; bottom: -1px; left: 50%; border: .42rem solid transparent; border-top: .6rem solid var(--notice-accent); border-bottom: 0; transform: translateX(-50%); }
.page-blocks .fl-cn span { padding: .2rem .9rem; border: 1.5px solid var(--notice-accent); border-radius: var(--r-pill); background: var(--deeper); color: var(--notice-accent); font-size: .875rem; font-weight: 700; }
.page-blocks .fl-status { min-height: 3.2em; margin: .1rem .25rem 0; font-weight: 700; line-height: 1.6; }
.page-blocks .fl-status small { display: block; color: var(--muted); font-weight: 500; }
/* 寬螢幕：每段三欄、步驟橫排 */
@media (min-width: 62rem) {
  .page-blocks .fl-stg { grid-template-columns: 15rem minmax(0, 1fr) 15.5rem; gap: 1.4rem; padding: 1.6rem; }
  .page-blocks .fl-stg:not(:has(.fl-it)) { grid-template-columns: 15rem minmax(0, 1fr); }
  .page-blocks .fl-who { display: block; }
  .page-blocks .fl-badge-ic { margin-bottom: .8rem; }
  .page-blocks .fl-num { display: inline-block; margin-right: .5rem; }
  .page-blocks .fl-part { display: inline-block; }
  .page-blocks .fl-mid { padding-left: 1.6rem; border-left: 1px dashed var(--on-dark-line); }
  .page-blocks .fl-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.4rem; }
  .page-blocks .fl-steps[data-n="1"] { grid-template-columns: minmax(0, 1fr); }
  .page-blocks .fl-steps[data-n="2"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-blocks .fl-steps[data-n="4"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-blocks .fl-fx { max-width: none; white-space: nowrap; }
  .page-blocks .fl-st { flex-direction: column; align-items: flex-start; gap: .55rem; padding: 1rem; }
  .page-blocks .fl-st + .fl-st::before { left: -1.05rem; top: 50%; border: .42rem solid transparent; border-left: .55rem solid var(--soft); transform: translateY(-50%); }
}
/* 小螢幕：三欄收成單欄後，分組、連接線與卡片貼齊 */
@media (max-width: 30rem) {
  .page-blocks .fl-stg { padding: 1rem; }
  .page-blocks .fl-fx { right: .5rem; max-width: calc(100% - 1rem); }
}
/* 動畫：未點亮處淡化、目前那格亮框、效果標籤彈出、連接線流動。只在允許動態時（JS 另外判斷一次，沒加 run 類別 就完全不動）。 */
@media (prefers-reduced-motion: no-preference) {
  html:not([data-motion="off"]) .page-blocks .fl-btn { transition: border-color var(--dur-base); }
  html:not([data-motion="off"]) .page-blocks .fl.run :is(.fl-st, .fl-it, .fl-nt, .fl-cn, .fl-fx) { transition: opacity .5s ease, border-color .3s; }
  html:not([data-motion="off"]) .page-blocks .fl.run :is(.fl-st, .fl-it, .fl-nt, .fl-cn) { opacity: .25; }
  html:not([data-motion="off"]) .page-blocks .fl.run .fl-fx { opacity: 0; }
  html:not([data-motion="off"]) .page-blocks .fl.run .fl-is-on { opacity: 1; }
  html:not([data-motion="off"]) .page-blocks .fl.run .fl-fx.fl-is-on { animation: fl-pop .45s ease-out; }
  html:not([data-motion="off"]) .page-blocks .fl.run .fl-st.fl-is-cur { border-color: var(--soft); box-shadow: 0 0 0 3px color-mix(in srgb, var(--soft) 18%, transparent); }
  html:not([data-motion="off"]) .page-blocks .fl.run .fl-cn.fl-is-on i { background: repeating-linear-gradient(var(--notice-accent) 0 7px, transparent 7px 13px); background-size: 2px 13px; animation: fl-flow .8s linear infinite; }
  html:not([data-motion="off"]) .page-blocks .fl.run.paused * { animation-play-state: paused; }
  @keyframes fl-pop { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
  @keyframes fl-flow { to { background-position: 0 13px; } }
}