/* === eHeading — 優惠方案（07-promotion.css）
   大型項目滑動器：分頁籤 + 媒體畫面 + 內容框。
   結構參考 Appier 的 feature-tab（分頁籤切換大圖 + 內容），視覺沿用
   01–05 的設計權杖：藍白、圓角、柔和陰影、100px 藥丸按鈕。
   動態：整頁橫向位移的「frames」＋ 內容錯落淡入 ＋ 底部進度線。 */

/* ---------- 區塊標題 ---------- */
.promo-head{max-width:840px;margin:0 auto clamp(30px,3.6vw,48px);text-align:center}
.promo-head .page-eyebrow{justify-content:center}
.promo-head h2{font-size:clamp(27px,3.1vw,46px);line-height:1.3;letter-spacing:-.05em;font-weight:850;margin:0 0 16px;text-wrap:pretty}
.promo-head__sub{font-size:17px;line-height:1.9;color:#5b7195;margin:0}

/* ---------- 分頁籤（switch button） ---------- */
.promo-tabs{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin:0 0 clamp(26px,3.2vw,44px)}
.promo-tab{display:inline-flex;align-items:center;gap:12px;padding:12px 24px;border:1px solid transparent;border-radius:100px;background:#f1f6fd;color:#33496d;font-size:16px;font-weight:750;line-height:1.25;white-space:nowrap;transition:background .25s,color .25s,border-color .25s,box-shadow .25s,transform .25s}
.promo-tab:hover{background:#e6f0ff;color:#075ef0;transform:translateY(-2px)}
.promo-tab.is-active{background:#e3edff;color:#075ef0;border-color:#b9d8ff;box-shadow:0 4px 10px rgba(10,110,248,.10)}
.promo-tab__label{text-align:left}
.promo-tab__icon{flex:none;display:grid;place-items:center;width:32px;height:32px;border-radius:11px;background:#fff;color:#0a6ef8;transition:background .25s,color .25s}
.promo-tab__icon svg{width:20px;height:20px;display:block}
.promo-tab.is-active .promo-tab__icon{background:#0a6ef8;color:#fff}
.promo-tab.is-active .promo-tab__icon svg{stroke-width:1.85}

/* ---------- 滑動器外框 ---------- */
.promo-slider{--promo-media-h:clamp(268px,30vw,436px);position:relative}
.promo-slider__viewport{position:relative;overflow:hidden;border-radius:30px;border:1px solid var(--hairline);background:#fff;box-shadow:0 26px 60px rgba(8,42,96,.10)}
.promo-slider__track{display:flex;--index:0;transform:translate3d(calc(var(--index) * -100%),0,0);transition:transform .72s cubic-bezier(.22,.9,.24,1);will-change:transform}
.promo-slide{flex:0 0 100%;min-width:0;position:relative;background:#fff}

/* 進場的「frame」邊緣：左側一道柔和內陰影，令相鄰兩格之間有層次 */
.promo-slide::after{content:"";position:absolute;inset:0;z-index:4;pointer-events:none;border-radius:30px;box-shadow:inset 20px 0 30px -20px rgba(8,42,96,.26);opacity:0;transition:opacity .45s}
.promo-slide.is-active::after{opacity:1}

/* ---------- 媒體畫面 ---------- */
.promo-slide__media{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:clamp(8px,1vw,14px);min-height:var(--promo-media-h);padding:clamp(14px,2vw,26px);background:linear-gradient(140deg,#e6f0ff 0%,#eff7ff 46%,#dbe9ff 100%);border-bottom:1px solid var(--hairline);overflow:hidden}
.promo-slide__media::before{content:"";position:absolute;width:58%;aspect-ratio:1;right:-10%;top:-30%;border-radius:50%;background:radial-gradient(circle,rgba(0,199,242,.22),transparent 68%);filter:blur(8px)}
.promo-slide__media::after{content:"";position:absolute;inset:0;background-image:linear-gradient(#2b7fff0e 1px,transparent 1px),linear-gradient(90deg,#2b7fff0e 1px,transparent 1px);background-size:46px 46px;mask-image:radial-gradient(circle at 50% 50%,#000 18%,transparent 76%);-webkit-mask-image:radial-gradient(circle at 50% 50%,#000 18%,transparent 76%)}
.promo-slide__art{position:relative;z-index:1;display:block;width:100%;max-width:1080px;height:auto;max-height:calc(var(--promo-media-h) - 104px);margin:0 auto;opacity:.55;transform:scale(.965);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.promo-slide.is-active .promo-slide__art{opacity:1;transform:scale(1)}


/* ---------- 媒體畫面：三拍動畫（建構 → 示範 → 成效） ---------- */
.promo-beats{position:relative;z-index:2;display:flex;flex-wrap:wrap;justify-content:center;gap:8px 10px;list-style:none;margin:0;padding:0}
.promo-beat{display:inline-flex;align-items:center;gap:7px;padding:5px 13px 5px 5px;border:1px solid transparent;border-radius:100px;background:#fff;box-shadow:0 4px 12px rgba(8,42,96,.07);color:#617599;font:inherit;font-size:14px;font-weight:750;line-height:1.2;white-space:nowrap;cursor:pointer;transition:background .35s var(--ease),border-color .35s var(--ease),color .35s var(--ease),box-shadow .35s var(--ease)}
.promo-beat:hover{background:#f4f9ff;border-color:#b9d8ff}
.promo-beat__num{display:grid;place-items:center;flex:none;width:24px;height:24px;border-radius:50%;background:#e6f0fd;color:#5b7195;font-size:12px;font-weight:850;transition:background .35s var(--ease),color .35s var(--ease)}
.promo-beat__label{transition:color .35s var(--ease)}
.promo-beat:focus-visible{outline:2px solid #0a6ef8;outline-offset:3px}
/* 已行過嗰拍：青色；行緊嗰拍：藍色
   （位置要揀 <li>，唔係 .promo-beat——每粒掣都係自己個 <li> 嘅第一個仔，
     用 :nth-child 揀掣會三粒一齊中） */
.promo-slide__media[data-stage="1"] .promo-beats>li:nth-child(-n+1) .promo-beat,
.promo-slide__media[data-stage="2"] .promo-beats>li:nth-child(-n+2) .promo-beat,
.promo-slide__media[data-stage="3"] .promo-beats>li:nth-child(-n+3) .promo-beat{border-color:#bfeaf6}
.promo-slide__media[data-stage="1"] .promo-beats>li:nth-child(-n+1) .promo-beat__num,
.promo-slide__media[data-stage="2"] .promo-beats>li:nth-child(-n+2) .promo-beat__num,
.promo-slide__media[data-stage="3"] .promo-beats>li:nth-child(-n+3) .promo-beat__num{background:#00c7f2;color:#fff}
.promo-slide__media[data-stage="1"] .promo-beats>li:nth-child(1) .promo-beat,
.promo-slide__media[data-stage="2"] .promo-beats>li:nth-child(2) .promo-beat,
.promo-slide__media[data-stage="3"] .promo-beats>li:nth-child(3) .promo-beat{border-color:#b9d8ff;box-shadow:0 8px 20px rgba(10,110,248,.16);color:#075ef0}
.promo-slide__media[data-stage="1"] .promo-beats>li:nth-child(1) .promo-beat__num,
.promo-slide__media[data-stage="2"] .promo-beats>li:nth-child(2) .promo-beat__num,
.promo-slide__media[data-stage="3"] .promo-beats>li:nth-child(3) .promo-beat__num{background:#0a6ef8;color:#fff}

/* 三拍之間淡入淡出 */
.promo-slide__art [data-beat]{opacity:0;transform:translateY(14px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.promo-slide__media[data-stage="1"] [data-beat="1"],
.promo-slide__media[data-stage="2"] [data-beat="2"],
.promo-slide__media[data-stage="3"] [data-beat="3"]{opacity:1;transform:none}

/* 每拍入面嘅細動作 */
.promo-slide__media[data-stage="1"] [data-beat="1"] [data-anim],
.promo-slide__media[data-stage="2"] [data-beat="2"] [data-anim],
.promo-slide__media[data-stage="3"] [data-beat="3"] [data-anim]{animation:var(--anim) var(--dur,.7s) var(--ease) var(--delay,0s) both}
[data-anim="pop"]{--anim:promoPop}
[data-anim="grow"]{--anim:promoGrow;transform-box:fill-box;transform-origin:50% 100%}
[data-anim="draw"]{--anim:promoDraw}
[data-anim="pulse"]{--anim:promoPulse}
@keyframes promoPop{from{opacity:0;transform:translateY(10px) scale(.96)}to{opacity:1;transform:none}}
@keyframes promoGrow{from{transform:scaleY(.04);opacity:.4}to{transform:scaleY(1);opacity:1}}
@keyframes promoDraw{from{stroke-dashoffset:100;stroke-dasharray:100}to{stroke-dashoffset:0;stroke-dasharray:100}}
@keyframes promoPulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.07);opacity:.8}}

/* ---------- 內容 ---------- */
.promo-slide__body{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:clamp(24px,3vw,48px);padding:clamp(26px,3.2vw,46px)}
.promo-slide__main>*{opacity:0;transform:translateY(20px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.promo-slide.is-active .promo-slide__main>*{opacity:1;transform:none}
.promo-slide.is-active .promo-slide__main>:nth-child(1){transition-delay:.05s}
.promo-slide.is-active .promo-slide__main>:nth-child(2){transition-delay:.11s}
.promo-slide.is-active .promo-slide__main>:nth-child(3){transition-delay:.17s}

.promo-slide__index{font-size:14px;font-weight:850;letter-spacing:.16em;color:#0a6ef8;margin:0 0 12px}
.promo-slide__title{font-size:clamp(23px,2.4vw,34px);line-height:1.3;letter-spacing:-.04em;font-weight:850;margin:0 0 10px;text-wrap:pretty}
.promo-slide__keywords{font-size:16px;line-height:1.6;font-weight:750;letter-spacing:.04em;color:#0a6ef8;margin:0 0 16px;text-wrap:pretty}
.promo-slide__features{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 26px}
.promo-slide__features li{position:relative;padding-left:0;text-wrap:pretty;font-size:16px;line-height:1.6;color:#3f5675;font-weight:600;text-wrap:pretty}
.promo-slide__features li::before{content:none}

.promo-slide__aside{align-self:stretch;display:flex;flex-direction:column;gap:14px;justify-content:space-between;background:linear-gradient(160deg,#f4faff 0%,#ffffff 100%);border:1px solid var(--hairline);border-radius:24px;padding:clamp(20px,2.2vw,28px);opacity:0;transform:translateY(20px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
.promo-slide.is-active .promo-slide__aside{opacity:1;transform:none;transition-delay:.22s}
.promo-slide__benefit{margin:0;font-size:16px;line-height:1.85;color:#3f5675;font-weight:600;text-wrap:pretty}
.promo-slide__fit{margin:30px 0 0;padding-top:16px;border-top:1px solid var(--hairline);font-size:15px;line-height:1.7;color:#617599;text-wrap:pretty}
.promo-slide__fit span{font-weight:800;color:#0a6ef8;margin-right:6px}
.promo-slide__price{margin:0;display:flex;flex-direction:column;gap:2px;padding-top:12px;border-top:1px solid var(--hairline)}
.promo-slide__price-label{font-size:15px;font-weight:700;color:#4d678c}
.promo-slide__price-value{font-size:clamp(26px,2.6vw,36px);font-weight:850;line-height:1.2;letter-spacing:-.03em;color:#075ef0}
.promo-slide__delivery{margin:0;font-size:14px;color:#617599}
.promo-slide__delivery span{font-weight:750;color:#4d678c;margin-right:6px}
.promo-slide__cta{margin-top:2px;display:inline-flex;align-items:center;justify-content:center;gap:12px;align-self:flex-start}

/* ---------- 左右導覽 ---------- */
.promo-nav{position:absolute;top:calc(var(--promo-media-h) / 2);z-index:6;width:52px;height:52px;display:grid;place-items:center;border-radius:50%;border:1px solid var(--hairline);background:#fff;color:#0a6ef8;box-shadow:0 10px 26px rgba(8,42,96,.18);transform:translateY(-50%);transition:background .22s,color .22s,box-shadow .22s}
.promo-nav:hover{background:#0a6ef8;color:#fff;box-shadow:0 18px 40px rgba(10,110,248,.34)}
.promo-nav svg{width:22px;height:22px}
.promo-nav--prev{left:14px}
.promo-nav--next{right:14px}

/* ---------- 底部進度線 + 圓點 ---------- */
.promo-progress{width:89px;height:5px;border-radius:100px;background:#c7daf4;box-shadow:inset 0 0 0 1px rgba(8,42,96,.08);overflow:hidden}
.promo-progress__bar{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:left center;background:linear-gradient(90deg,#08a0ff,#0a5ef8)}
.promo-controls{display:flex;flex-direction:column;align-items:center;gap:11px;margin-top:26px}
.promo-dots{display:flex;align-items:center;justify-content:space-between;gap:9px;width:89px}
.promo-dot{width:10px;height:10px;padding:0;border:0;border-radius:50%;background:#a6c6ee;transition:background .25s,width .25s}
.promo-dot:hover{background:#9ec8ff}
.promo-dot.is-active{width:32px;border-radius:100px;background:#0a6ef8}
.promo-hint{margin:0;font-size:14px;color:#8299ba}

/* ---------- 響應式 ---------- */
@media(max-width:1400px){
  /* 呢個闊度以下，兩欄列表每欄放唔落最長嗰句，尾行會剩兩個字，讀落好論盡 */
  .promo-slide__features{grid-template-columns:minmax(0,1fr)}
  /* 項目列表變成一欄，左欄會變高；價錢卡跟住拉高會令內部間距鬆散，
     所以喺呢個闊度以下維持卡片本身高度 */
  .promo-slide__aside{align-self:start;justify-content:flex-start}
}

@media(max-width:980px){
  .promo-slide__body{grid-template-columns:minmax(0,1fr)}
  .promo-slide__aside{max-width:none}
}
@media(max-width:620px){
  .promo-slider{--promo-media-h:clamp(196px,42vw,268px)}
  /* 四粒分頁籤改成 2x2 格：全部一次過睇得到，唔使橫向捲動 */
  .promo-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 12px;overflow:visible}
  .promo-tab{width:100%;min-height:62px;justify-content:flex-start;gap:9px;padding:10px 12px}
  /* 摺成兩行時平均斷行，避免尾行剩一兩個字 */
  .promo-tab__label{white-space:normal;line-height:1.3;text-wrap:balance}
  .promo-slide__media{padding:12px}
  .promo-beat{padding:4px 10px 4px 4px;gap:6px;font-size:14px}
  .promo-beat__num{width:21px;height:21px;font-size:11px}
  .promo-slide__features{gap:12px 20px}
  /* 手機闊度唔夠擺兩粒，隱藏左右導覽：分頁籤、圓點同滑動已經夠用 */
  .promo-nav{display:none}
  .promo-tab{padding:10px 16px;font-size:15px}
  .promo-tab__icon{width:28px;height:28px;border-radius:9px}
  .promo-tab__icon svg{width:18px;height:18px}
  .promo-slide__features{grid-template-columns:minmax(0,1fr)}
  .promo-slide__body{padding:22px 20px}
  .promo-nav{width:44px;height:44px}
  .promo-nav svg{width:18px;height:18px}
  .promo-nav--prev{left:10px}
  .promo-nav--next{right:10px}
  .promo-slider__viewport,.promo-slide::after{border-radius:22px}
}

/* ---------- 減少動態 ---------- */
@media(prefers-reduced-motion:reduce){
  .promo-slider__track{transition:none}
  .promo-slide__main>*,.promo-slide__aside{opacity:1!important;transform:none!important;transition:none!important}
  .promo-slide__art{opacity:1!important;transform:none!important;transition:none!important}
  .promo-slide__art [data-beat]{transition:none}
  .promo-slide__media [data-anim]{animation:none!important}
  .promo-beat{transition:none}
  .promo-slide::after{opacity:1}
}