/* =========================================================
   試聽專區 v2 — trial-v2.css（iv2 設計系統，scope: .iv2-root）
   風格：學院編輯風（Academic Editorial）— 紙白×學院深藍×金榜金
   CMS 驅動：依科目分組、篩選器、lightbox 播放 Bunny / YouTube
   規則：iv2- 前綴 scope、內文 Noto Sans TC、標題 Noto Serif TC、全形標點、cache-bust
   ========================================================= */

.iv2-root{
  --paper:#f4f1ea;
  --ink:#16223f;
  --ink-soft:#3c4866;
  --muted:#7b819a;
  --line:#ddd6c8;
  --line-2:#e7e1d5;
  --primary:#2f3f86;
  --primary-deep:#222e63;
  --gold:#bf9b48;
  --gold-deep:#9c7c2f;
  --card:#fffdf8;
  --shadow-sm:0 1px 2px rgba(22,34,63,.05);
  --shadow-md:0 14px 34px -18px rgba(22,34,63,.35);
  --shadow-lg:0 40px 80px -36px rgba(22,34,63,.5);
  --serif:"Noto Serif TC",serif;
  --fraunces:"Fraunces",serif;
  --sans:"Noto Sans TC","Noto Sans Traditional Chinese",sans-serif;
  --r:14px;
  --ease:cubic-bezier(.2,.7,.2,1);

  position:relative;
  font-family:var(--sans);
  color:var(--ink);
  /* 2026-06-27 使用者要求:頁面格線/米色紙感背景改為純白 */
  background-color:#fff;
  line-height:1.6;
}
.iv2-root *{box-sizing:border-box}
.iv2-root a{color:inherit;text-decoration:none}

/* 容器 — 寬度對齊首頁(index-v2.css)：80% / 無上限 / 內距 24px；保留 hero 堆疊所需的 position+z-index */
.iv2-root .iv2-wrap{width:80%;max-width:none;margin-inline:auto;padding-inline:24px;position:relative;z-index:1}
@media (max-width:1024px){.iv2-root .iv2-wrap{width:90%}}
@media (max-width:600px){.iv2-root .iv2-wrap{width:100%;padding-inline:14px}}

/* 共用排版 */
.iv2-root .iv2-h1{font-family:var(--serif);font-weight:900;color:var(--ink);font-size:clamp(40px,5.4vw,78px);line-height:1.04;letter-spacing:.01em;margin:0}
.iv2-root .iv2-lead{font-size:clamp(16px,1.4vw,18px);line-height:1.8;color:var(--ink-soft)}

/* 麵包屑 */
.iv2-root .iv2-page-utility-row{border-bottom:1px solid var(--line)}
.iv2-root .iv2-page-utility{padding-block:16px}
.iv2-root .iv2-crumb{font-size:13px;color:var(--muted);letter-spacing:.02em}
.iv2-root .iv2-crumb a:hover{color:var(--primary)}
.iv2-root .iv2-crumb .sep{margin:0 8px;opacity:.6}

/* ===== HERO ===== */
/* z-index:auto 蓋掉全站 css/style.css 的 header{z-index:999999}；
   否則此 <header> 會以 999999 疊在固定導覽列(.iv2-nav z:1000)之上，蓋住整排選單點擊 */
/* Hero:feature.aspx 華麗版深 navy 多層極光 + 漂浮光球 + 星點微光(文字反白);
   z-index:auto 維持(勿讓 <header> 蓋住固定導覽列點擊);overflow:hidden 裁切光球 */
.iv2-root .iv2-trial-hero{
  position:relative;z-index:auto;overflow:hidden;color:#fff;
  padding-block:56px 64px;
  background:
    radial-gradient(60% 80% at 86% 0%, rgba(133,116,245,.40) 0%, transparent 60%),
    radial-gradient(55% 78% at 10% 106%, rgba(86,69,212,.36) 0%, transparent 58%),
    radial-gradient(46% 62% at 62% 118%, rgba(255,56,92,.18) 0%, transparent 60%),
    linear-gradient(135deg, #070f28 0%, #0e1a3a 46%, #1b2c58 100%);
}
/* 星點微光 */
.iv2-root .iv2-trial-hero::after{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:
    radial-gradient(2px 2px at 18% 32%, rgba(255,255,255,.85), transparent 60%),
    radial-gradient(2px 2px at 73% 22%, rgba(245,215,94,.85), transparent 60%),
    radial-gradient(1.5px 1.5px at 42% 68%, rgba(255,255,255,.70), transparent 60%),
    radial-gradient(1.5px 1.5px at 88% 58%, rgba(170,150,255,.85), transparent 60%),
    radial-gradient(2px 2px at 58% 44%, rgba(255,255,255,.60), transparent 60%),
    radial-gradient(1.5px 1.5px at 30% 80%, rgba(245,215,94,.60), transparent 60%);
  background-repeat:no-repeat;opacity:.7;
  animation:iv2HeroTwinkle 4.5s ease-in-out infinite alternate;
}
/* 右上漂浮光球(紫) */
.iv2-root .iv2-trial-hero::before{
  content:"";position:absolute;z-index:0;top:-100px;right:-70px;
  width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle at center, rgba(133,116,245,.40) 0%, rgba(133,116,245,0) 70%);
  pointer-events:none;animation:iv2HeroFloatA 9s ease-in-out infinite alternate;
}
/* 左下/右側漂浮光球(掛在 .iv2-wrap 上) */
.iv2-root .iv2-trial-hero .iv2-wrap::before{
  content:"";position:absolute;z-index:-1;left:-140px;bottom:-140px;
  width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle at center, rgba(86,69,212,.34) 0%, rgba(86,69,212,0) 70%);
  pointer-events:none;animation:iv2HeroFloatB 11s ease-in-out infinite alternate;
}
.iv2-root .iv2-trial-hero .iv2-wrap::after{
  content:"";position:absolute;z-index:-1;top:0;right:-2%;
  width:150px;height:150px;border-radius:50%;
  background:radial-gradient(circle at center, rgba(245,215,94,.20) 0%, rgba(245,215,94,0) 70%);
  pointer-events:none;animation:iv2HeroFloatA 13s ease-in-out infinite alternate-reverse;
}
@media (prefers-reduced-motion:reduce){
  .iv2-root .iv2-trial-hero::after,
  .iv2-root .iv2-trial-hero::before,
  .iv2-root .iv2-trial-hero .iv2-wrap::before,
  .iv2-root .iv2-trial-hero .iv2-wrap::after{animation:none}
}
.iv2-root .iv2-hero-eyebrow{font-family:var(--fraunces);font-style:italic;font-size:15px;letter-spacing:.04em;color:#f5d75e;display:inline-flex;align-items:center;gap:12px;margin-bottom:18px;position:relative;z-index:1}
.iv2-root .iv2-hero-eyebrow::before{content:"";width:42px;height:1px;background:#f5d75e}
.iv2-root .iv2-trial-hero .iv2-h1{color:#fff;position:relative;z-index:1}
.iv2-root .iv2-trial-hero .iv2-accent{position:relative;white-space:nowrap}
.iv2-root .iv2-trial-hero .iv2-accent::after{content:"";position:absolute;left:-2%;right:-2%;bottom:.12em;height:.34em;z-index:-1;background:linear-gradient(90deg,rgba(245,215,94,.8),rgba(133,116,245,.6));border-radius:3px}
.iv2-root .iv2-trial-hero .iv2-lead{margin-top:22px;max-width:560px;color:rgba(255,255,255,.82);position:relative;z-index:1}
.iv2-root .iv2-hero-stats{display:flex;gap:38px;margin-top:32px;flex-wrap:wrap;position:relative;z-index:1}
.iv2-root .iv2-stat .n{font-family:var(--fraunces);font-size:32px;font-weight:600;color:#fff;line-height:1}
.iv2-root .iv2-stat .l{font-size:13px;color:rgba(255,255,255,.66);margin-top:6px;letter-spacing:.06em}

/* ===== 篩選工具列 ===== */
/* 篩選列：sticky + backdrop-filter 在長列表捲動時會逐幀重算模糊→卡頓；
   降低模糊半徑(10→6)並提高底色不透明度(.85→.92)維持霧面感，大幅減輕捲動重繪成本 */
.iv2-root .iv2-trial-filter{position:sticky;top:0;z-index:30;display:flex;gap:14px;align-items:center;flex-wrap:wrap;background:rgba(244,241,234,.92);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-block:16px;margin-bottom:8px}
.iv2-root .iv2-filter-search{position:relative;flex:1 1 260px;min-width:200px}
.iv2-root .iv2-filter-search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--muted)}
.iv2-root .iv2-filter-search input{width:100%;height:46px;border:1px solid var(--line);border-radius:999px;background:var(--card);padding:0 18px 0 42px;font-family:var(--sans);font-size:15px;color:var(--ink);transition:border-color .2s,box-shadow .2s}
.iv2-root .iv2-filter-search input::placeholder{color:var(--muted)}
.iv2-root .iv2-filter-search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(47,63,134,.1)}
.iv2-root .iv2-filter-select{position:relative;height:46px;min-width:148px;border:1px solid var(--line);border-radius:999px;background:var(--card) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%233c4866' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat right 16px center;padding:0 38px 0 18px;font-family:var(--sans);font-size:14.5px;color:var(--ink);cursor:pointer;-webkit-appearance:none;appearance:none;transition:border-color .2s,color .2s}
.iv2-root .iv2-filter-select:focus{outline:none;border-color:var(--primary)}
.iv2-root .iv2-filter-select.on{border-color:var(--primary);color:var(--primary);font-weight:700}
.iv2-root .iv2-filter-reset{height:46px;padding:0 20px;border:1px dashed var(--line);background:transparent;border-radius:999px;font-family:var(--sans);font-size:14px;color:var(--muted);cursor:pointer;transition:.2s}
.iv2-root .iv2-filter-reset:hover{color:var(--gold-deep);border-color:var(--gold)}
.iv2-root .iv2-filter-count{margin-left:auto;font-size:13.5px;color:var(--muted)}
.iv2-root .iv2-filter-count b{font-family:var(--fraunces);color:var(--primary);font-size:17px;font-weight:600}
@media(max-width:760px){.iv2-root .iv2-filter-count{margin-left:0;width:100%}.iv2-root .iv2-filter-select{flex:1 1 40%;min-width:0}}

/* ===== 狀態 ===== */
.iv2-root .iv2-trial-state{text-align:center;color:var(--muted);padding-block:72px;font-size:1.05em}

/* ===== 科目分區 ===== */
.iv2-root .iv2-trial-list-section{padding-block:24px 90px}
.iv2-root .iv2-subject-group{padding-top:46px;opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.iv2-root .iv2-subject-group.in{opacity:1;transform:none}
.iv2-root .iv2-subject-head{display:flex;align-items:flex-end;gap:16px;padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:28px}
.iv2-root .iv2-subject-idx{font-family:var(--fraunces);font-size:18px;font-weight:600;color:var(--gold-deep);letter-spacing:.05em;line-height:1.2;padding-top:6px}
.iv2-root .iv2-subject-name{font-family:var(--serif);font-weight:700;font-size:clamp(24px,3.2vw,36px);color:var(--ink);line-height:1.1}
.iv2-root .iv2-subject-meta{margin-left:auto;font-size:13px;color:var(--muted);letter-spacing:.04em;white-space:nowrap;padding-bottom:6px}

/* ===== 影片網格 / 卡片 ===== */
.iv2-root .iv2-trial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
@media(max-width:900px){.iv2-root .iv2-trial-grid{grid-template-columns:repeat(2,1fr);gap:20px}}
@media(max-width:560px){.iv2-root .iv2-trial-grid{grid-template-columns:1fr}}

.iv2-root .iv2-trial-card{background:var(--card);border:none;border-radius:var(--r);overflow:hidden;cursor:pointer;box-shadow:0 1px 2px rgba(15,23,48,0.04), 0 10px 30px rgba(15,23,48,0.06);transition:transform .35s var(--ease),box-shadow .35s var(--ease);display:flex;flex-direction:column}
.iv2-root .iv2-trial-card:hover{transform:translateY(-4px);box-shadow:0 4px 10px rgba(15,23,48,0.05), 0 22px 48px rgba(15,23,48,0.12)}

.iv2-root .iv2-trial-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink)}
.iv2-root .iv2-thumb-grad{position:absolute;inset:0;background-size:cover;background-position:center;transition:transform .5s var(--ease)}
.iv2-root .iv2-trial-card:hover .iv2-thumb-grad{transform:scale(1.05)}
/* 無縮圖時的預設視覺：工程藍圖網格 + 同心圓線稿 */
.iv2-root .iv2-trial-thumb:not(.is-img) .iv2-thumb-grad::before{content:"";position:absolute;inset:0;opacity:.6;background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.07) 0 1px,transparent 1px 28px),repeating-linear-gradient(90deg,rgba(255,255,255,.07) 0 1px,transparent 1px 28px);-webkit-mask-image:linear-gradient(125deg,#000,transparent 72%);mask-image:linear-gradient(125deg,#000,transparent 72%)}
.iv2-root .iv2-trial-thumb:not(.is-img) .iv2-thumb-grad::after{content:"";position:absolute;right:-46px;bottom:-58px;width:188px;height:188px;border-radius:50%;border:1.5px solid rgba(255,255,255,.18);box-shadow:0 0 0 20px rgba(255,255,255,.05),0 0 0 44px rgba(255,255,255,.03);transition:transform .6s var(--ease)}
.iv2-root .iv2-trial-card:hover .iv2-trial-thumb:not(.is-img) .iv2-thumb-grad::after{transform:scale(1.12) rotate(8deg)}
.iv2-root .iv2-thumb-sheen{position:absolute;inset:0;background:linear-gradient(120deg,rgba(255,255,255,.14),transparent 42%);pointer-events:none}

.iv2-root .iv2-play-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(16,22,40,.18);transition:background .35s var(--ease)}
.iv2-root .iv2-trial-card:hover .iv2-play-overlay{background:rgba(16,22,40,.34)}
.iv2-root .iv2-play-overlay span{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(255,253,248,.16);border:1.5px solid rgba(255,255,255,.6);backdrop-filter:blur(4px);transition:transform .35s var(--ease),background .35s var(--ease),border-color .35s var(--ease)}
.iv2-root .iv2-trial-card:hover .iv2-play-overlay span{transform:scale(1.12);background:var(--gold);border-color:var(--gold)}
.iv2-root .iv2-play-overlay svg{width:24px;height:24px;color:#fff;margin-left:3px}
.iv2-root .iv2-trial-card:hover .iv2-play-overlay svg{color:var(--ink)}

.iv2-root .iv2-trial-info{padding:18px 20px 20px;display:flex;flex-direction:column;gap:12px;flex:1}
.iv2-root .iv2-trial-name{font-family:var(--serif);font-weight:600;font-size:17px;line-height:1.45;color:var(--ink);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.iv2-root .iv2-trial-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto}
.iv2-root .iv2-tag{font-size:11.5px;font-weight:500;letter-spacing:.03em;padding:4px 10px;border-radius:999px;line-height:1;border:none}
.iv2-root .iv2-tag.subj{background:rgba(47,63,134,.09);color:var(--primary)}
.iv2-root .iv2-tag.cls{background:rgba(191,155,72,.14);color:var(--gold-deep)}
.iv2-root .iv2-tag.exam{background:#eef0ea;color:var(--ink-soft)}

/* ===== Lightbox ===== */
.iv2-root .iv2-lightbox-mask{position:fixed;inset:0;z-index:80;display:none;align-items:center;justify-content:center;padding:26px;background:rgba(12,16,30,.9)}
.iv2-root .iv2-lightbox-mask.is-open{display:flex}
.iv2-root .iv2-lightbox-frame{position:relative;width:min(980px,100%)}
.iv2-root .iv2-lightbox-embed{position:relative;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden;box-shadow:var(--shadow-lg)}
.iv2-root .iv2-lightbox-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.iv2-root .iv2-lightbox-close{position:absolute;top:-46px;right:0;width:40px;height:40px;border:0;border-radius:50%;background:rgba(255,255,255,.14);color:#fff;font-size:24px;cursor:pointer;transition:.2s}
.iv2-root .iv2-lightbox-close:hover{background:var(--gold);color:var(--ink)}
@media(max-width:600px){.iv2-root .iv2-lightbox-mask{padding:12px}.iv2-root .iv2-lightbox-close{top:-42px}}

/* ============================================================
   D3 版型：上方科目 tabs + 常駐播放器 + 班型播放清單（2026-06-27 開始實作）
   ============================================================ */
/* 科目 tabs（桌機吸頂；top 對齊固定導覽列捲動高 62px，修正被導覽列遮住） */
.iv2-root .iv2-trial-tabsrow{position:sticky;top:62px;z-index:30;background:rgba(255,255,255,.94);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.iv2-root .iv2-trial-tabs-inner{display:flex;align-items:center;gap:12px 14px;flex-wrap:wrap;padding-block:14px}
/* 科目 tabs 獨占整列、整齊換行；搜尋框與計數自動落到下一列 */
.iv2-root .iv2-trial-tabs{flex:1 1 100%;display:flex;gap:9px;flex-wrap:wrap;align-items:center}
.iv2-root .iv2-trial-tab{height:38px;padding:0 18px;border:1px solid var(--line);border-radius:999px;background:#fff;font-family:var(--sans);font-size:14.5px;color:var(--ink-soft);cursor:pointer;transition:.18s var(--ease)}
.iv2-root .iv2-trial-tab:hover{border-color:var(--gold);color:var(--gold-deep)}
.iv2-root .iv2-trial-tab.is-on{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:700}
.iv2-root .iv2-trial-search{position:relative;flex:1 1 220px;min-width:180px;max-width:340px}
.iv2-root .iv2-trial-search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:17px;height:17px;color:var(--muted)}
.iv2-root .iv2-trial-search input{width:100%;height:42px;border:1px solid var(--line);border-radius:999px;background:#fff;padding:0 16px 0 38px;font-family:var(--sans);font-size:14.5px;color:var(--ink);transition:border-color .2s,box-shadow .2s}
.iv2-root .iv2-trial-search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(47,63,134,.1)}
.iv2-root .iv2-trial-tabs-count{margin-left:auto;font-size:13.5px;color:var(--muted);white-space:nowrap}
.iv2-root .iv2-trial-tabs-count b{font-family:var(--fraunces);color:var(--primary);font-size:17px;font-weight:600}
@media(max-width:760px){.iv2-root .iv2-trial-search{flex-basis:100%;max-width:none}.iv2-root .iv2-trial-tabs-count{margin-left:0}}
@media(max-width:980px){.iv2-root .iv2-trial-tabsrow{position:static}}

/* ── CLS 修正(2026-07-08):預留 tabs 列與播放區版位 ──
   trial.js 於 AJAX 回來後才顯示 tabs 列(#trialTabsRow,已移除 display:none)與播放區(#trialLayout),
   原本兩者從 0 撐開,把下方內容與頁尾大幅下推(桌機 CLS 0.31)。
   此處在桌機(≥981px、版型為左右並排)預留兩者最終高度,讓內容在 JS 帶入前就佔好版位 → 位移消除。
   播放區高度會隨視窗寬等比縮放(16:9 播放器)+ 固定 meta,故非定值:
     正式站實測 layoutH ≈ 732(981)→790(1280)→836(1440)→972(1920),擬合 ≈ 28vw + 434;
     + padding 118(border-box)⇒ 版位 ≈ 28vw + 552。
   另 trial.js 首片 render 後會二次 AJAX 載入老師介紹(#tpIntro 富文本)才 .show(),
   長度因老師而異;故在擬合值上再加 ~28px 緩衝吸收此變動與標籤換行,取 max() 作窄端下限。
   確保各桌機寬度「預留 ≥ 實際」→ 位移歸零、殘留空白約 30px(頁尾前細窄留白,幾乎不可見)。
   行動版版型不同故不套用。 */
@media (min-width: 981px) {
  .iv2-root .iv2-trial-tabsrow { min-height: 169px; }
  .iv2-root .iv2-trial-stage-section { min-height: max(880px, calc(28vw + 580px)); }
}

/* 主版型 */
.iv2-root .iv2-trial-stage-section{padding-block:28px 90px}
.iv2-root .iv2-trial-layout{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(330px,1fr);gap:30px;align-items:start}
@media(max-width:980px){.iv2-root .iv2-trial-layout{grid-template-columns:minmax(0,1fr);gap:20px}}

/* 左：常駐播放器（桌機 sticky，清過導覽列＋tabs） */
.iv2-root .iv2-trial-player{position:sticky;top:140px;min-width:0}
@media(max-width:980px){.iv2-root .iv2-trial-player{position:static;min-width:0}}
.iv2-root .iv2-tp-stage{position:relative;aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;background:#0b1124;box-shadow:0 1px 2px rgba(15,23,48,.05),0 22px 50px rgba(15,23,48,.16)}
.iv2-root .iv2-tp-poster{position:absolute;inset:0;background-size:cover;background-position:center}
.iv2-root .iv2-tp-sheen{position:absolute;inset:0;pointer-events:none;background:linear-gradient(120deg,rgba(255,255,255,.12),transparent 44%)}
.iv2-root .iv2-tp-frame{position:absolute;inset:0;z-index:2}
.iv2-root .iv2-tp-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.iv2-root .iv2-tp-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:3;width:78px;height:78px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(255,253,248,.16);border:1.5px solid rgba(255,255,255,.6);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);color:#fff;cursor:pointer;transition:.25s var(--ease)}
.iv2-root .iv2-tp-play svg{width:30px;height:30px;margin-left:4px}
.iv2-root .iv2-tp-play:hover{transform:translate(-50%,-50%) scale(1.08);background:var(--gold);border-color:var(--gold);color:var(--ink)}
.iv2-root .iv2-tp-stage.is-playing .iv2-tp-play,.iv2-root .iv2-tp-stage.is-playing .iv2-tp-sheen{opacity:0;pointer-events:none}

/* 播放器下方資訊 */
.iv2-root .iv2-tp-meta{margin-top:20px}
.iv2-root .iv2-tp-eyebrow{font-family:var(--fraunces);font-style:italic;font-size:13px;letter-spacing:.06em;color:var(--gold-deep);text-transform:uppercase}
.iv2-root .iv2-tp-title{font-family:var(--serif);font-weight:700;font-size:clamp(20px,2.4vw,27px);line-height:1.32;margin:8px 0 0;color:var(--ink)}
.iv2-root .iv2-tp-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.iv2-root .iv2-tp-tag{font-size:12px;font-weight:600;letter-spacing:.02em;padding:4px 11px;border-radius:999px}
.iv2-root .iv2-tp-tag.subj{background:rgba(47,63,134,.09);color:var(--primary)}
.iv2-root .iv2-tp-tag.cls{background:rgba(191,155,72,.16);color:var(--gold-deep)}
.iv2-root .iv2-tp-tag.exam{background:#eef0ea;color:var(--ink-soft)}
.iv2-root .iv2-tp-teacher{display:flex;align-items:center;gap:11px;margin-top:16px;padding:12px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s,transform .15s}
.iv2-root .iv2-tp-teacher:hover{border-color:var(--primary);box-shadow:0 6px 18px rgba(47,63,134,.12);transform:translateY(-1px)}
.iv2-root .iv2-tp-av{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--primary-deep));flex-shrink:0;overflow:hidden;background-size:cover;background-position:center}
.iv2-root .iv2-tp-teacher-name{min-width:0}
.iv2-root .iv2-tp-teacher-name b{font-weight:700;display:block;color:var(--ink)}
.iv2-root .iv2-tp-teacher-name span{font-size:12.5px;color:var(--muted)}
.iv2-root .iv2-tp-teacher-go{margin-left:auto;font-size:12.5px;font-weight:700;color:var(--primary);white-space:nowrap}
/* 師資內頁完整介紹（contents 富文本，套入內頁全文） */
.iv2-root .iv2-tp-intro{margin-top:18px;padding-top:18px;border-top:1px solid var(--line-2);font-size:15px;color:var(--ink-soft);line-height:1.9;overflow-wrap:break-word;word-break:break-word}
.iv2-root .iv2-tp-intro > *:first-child{margin-top:0}
/* 內頁全文防溢出（窄頁不跑版）：任何子元素不得超出欄寬；表格可橫向捲動 */
.iv2-root .iv2-tp-intro *{max-width:100%}
.iv2-root .iv2-tp-intro table{width:100%;display:block;overflow-x:auto}
.iv2-root .iv2-tp-intro iframe,.iv2-root .iv2-tp-intro video,.iv2-root .iv2-tp-intro embed{max-width:100%}
.iv2-root .iv2-tp-intro p{margin:0 0 13px}
.iv2-root .iv2-tp-intro img{max-width:100%;height:auto;border-radius:10px;margin:6px 0}
.iv2-root .iv2-tp-intro h1,.iv2-root .iv2-tp-intro h2,.iv2-root .iv2-tp-intro h3,.iv2-root .iv2-tp-intro h4{font-family:var(--serif);color:var(--ink);line-height:1.4;margin:18px 0 10px}
.iv2-root .iv2-tp-intro h2{font-size:1.25em}
.iv2-root .iv2-tp-intro h3{font-size:1.12em}
.iv2-root .iv2-tp-intro ul,.iv2-root .iv2-tp-intro ol{padding-left:1.45em;margin:0 0 13px}
.iv2-root .iv2-tp-intro li{margin:4px 0}
.iv2-root .iv2-tp-intro a{color:var(--primary);text-decoration:underline}
.iv2-root .iv2-tp-intro strong,.iv2-root .iv2-tp-intro b{color:var(--ink)}
.iv2-root .iv2-tp-cta{margin-top:20px;display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 26px;border-radius:999px;background:linear-gradient(135deg,#3a4ba0,var(--primary-deep));color:#fff;font-weight:700;font-size:15px;box-shadow:0 10px 26px rgba(47,63,134,.26);transition:.2s var(--ease)}
.iv2-root .iv2-tp-cta:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(47,63,134,.34)}
.iv2-root .iv2-tp-cta svg{width:18px;height:18px}

/* 右：班型播放清單 */
.iv2-root .iv2-trial-list{min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:0 1px 2px rgba(15,23,48,.04),0 12px 30px rgba(15,23,48,.06);overflow:hidden}
.iv2-root .iv2-tl-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:16px 18px;border-bottom:1px solid var(--line-2);background:linear-gradient(90deg,rgba(22,34,63,.045),transparent 72%)}
.iv2-root .iv2-tl-head h2{font-family:var(--serif);font-size:17px;font-weight:700;margin:0;color:var(--ink)}
.iv2-root .iv2-tl-head .n{font-size:13px;color:var(--muted)}
.iv2-root .iv2-tl-scroll{max-height:none}
@media(min-width:981px){.iv2-root .iv2-tl-scroll{max-height:calc(100vh - 200px);overflow:auto}}
.iv2-root .iv2-tl-group{display:flex;align-items:baseline;gap:11px;padding:16px 18px 8px}
.iv2-root .iv2-tl-group .idx{font-family:var(--fraunces);font-size:14px;color:var(--gold-deep);font-weight:600}
.iv2-root .iv2-tl-group .gname{font-family:var(--serif);font-size:15px;font-weight:700;color:var(--ink)}
.iv2-root .iv2-tl-group .gcnt{margin-left:auto;font-size:12px;color:var(--muted)}
.iv2-root .iv2-tl-item{display:flex;align-items:center;gap:12px;padding:10px 14px;margin:0 8px 4px;border-radius:11px;cursor:pointer;transition:background .14s var(--ease);position:relative}
.iv2-root .iv2-tl-item:hover{background:#faf8f3}
.iv2-root .iv2-tl-item.is-active{background:rgba(47,63,134,.07)}
.iv2-root .iv2-tl-item.is-active::before{content:"";position:absolute;left:-8px;top:50%;transform:translateY(-50%);width:3px;height:32px;border-radius:3px;background:var(--gold)}
.iv2-root .iv2-tl-thumb{position:relative;width:84px;aspect-ratio:16/9;border-radius:8px;overflow:hidden;flex-shrink:0;background:#0b1124}
.iv2-root .iv2-tl-thumb-grad{position:absolute;inset:0}
.iv2-root .iv2-tl-thumb-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#fff;opacity:0;transition:.15s}
.iv2-root .iv2-tl-thumb-play svg{width:22px;height:22px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.5))}
.iv2-root .iv2-tl-item:hover .iv2-tl-thumb-play,.iv2-root .iv2-tl-item.is-active .iv2-tl-thumb-play{opacity:1}
.iv2-root .iv2-tl-item-main{min-width:0;flex:1}
.iv2-root .iv2-tl-item-title{font-weight:600;font-size:14px;line-height:1.4;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.iv2-root .iv2-tl-item.is-active .iv2-tl-item-title{color:var(--primary-deep)}
.iv2-root .iv2-tl-item-meta{font-size:12px;color:var(--muted);margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.iv2-root .iv2-tl-item-eq{flex-shrink:0;width:16px;height:14px;display:none;align-items:flex-end;gap:2px}
.iv2-root .iv2-tl-item.is-active .iv2-tl-item-eq{display:flex}
.iv2-root .iv2-tl-item-eq i{width:3px;background:var(--primary);border-radius:2px;transform-origin:bottom;animation:iv2TlEq 1s ease-in-out infinite}
.iv2-root .iv2-tl-item-eq i:nth-child(1){height:40%;animation-delay:0s}
.iv2-root .iv2-tl-item-eq i:nth-child(2){height:80%;animation-delay:.2s}
.iv2-root .iv2-tl-item-eq i:nth-child(3){height:60%;animation-delay:.4s}
@keyframes iv2TlEq{0%,100%{transform:scaleY(.4)}50%{transform:scaleY(1)}}
.iv2-root .iv2-tl-foot{padding:14px 18px;border-top:1px solid var(--line-2);font-size:12.5px;color:var(--muted);text-align:center}

@media(prefers-reduced-motion:reduce){
  .iv2-root *{animation:none!important;transition:none!important}
  .iv2-root .iv2-subject-group{opacity:1;transform:none}
}