/* ==========================================================================
   fde-course.css — 腾讯云 ADP(FDE) 认证课程镜像页
   复用 style.css 的设计 Token，保持全站视觉一致
   ========================================================================== */

/* ---------- Hero ---------- */
.fde-hero {
  position: relative;
  padding: 56px 0 64px;
  background:
    radial-gradient(1100px 420px at 12% -20%, rgba(91, 91, 214, .14), transparent 60%),
    radial-gradient(900px 380px at 92% 0%, rgba(242, 107, 58, .12), transparent 60%),
    var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}
.fde-crumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--color-text-3); margin-bottom: 18px;
}
.fde-crumb a { color: var(--color-text-2); }
/* 移动端：面包屑链接最小点击区 24px（WCAG 2.5.8），原来只有 23px 高 */
@media (max-width: 768px){ .fde-crumb a { display:inline-flex; align-items:center; min-height:24px; } }
.fde-crumb a:hover { color: var(--color-primary); }
.fde-crumb span { color: var(--color-text-3); }

.fde-badge {
  display: inline-block;
  padding: 5px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
  color: var(--color-primary-dark);
  background: var(--color-primary-50);
  margin-bottom: 16px;
}
.fde-title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700; letter-spacing: -.02em; line-height: 1.2;
  margin: 0 0 14px;
}
.fde-sub {
  max-width: 760px; font-size: 16px; line-height: 1.8;
  color: var(--color-text-2); margin: 0 0 22px;
}
.fde-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.fde-meta__item {
  display: inline-flex; align-items: center;
  padding: 7px 14px; border-radius: var(--radius-sm);
  background: #fff; border: 1px solid var(--color-border);
  font-size: 13px; color: var(--color-text-2); font-weight: 500;
}
.fde-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Hero 两栏布局 + 学习答疑二维码卡 ---------- */
.fde-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 40px;
  align-items: center;
}
.fde-hero__main { min-width: 0; }
.fde-hero__card {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 22px 22px 18px;
  box-shadow:
    0 20px 50px -28px rgba(11, 11, 18, .25),
    0 4px 12px rgba(91, 91, 214, .08);
  isolation: isolate;
  transition: background-color .28s ease, border-color .28s ease, color .28s ease, box-shadow .28s ease;
}

/* 点击「扫码咨询考证」→ 右侧二维码卡变品牌紫底高亮（不弹二维码） */
.fde-hero__card.is-qr-highlight {
  background: var(--color-primary, #5B5BD6);
  border-color: var(--color-primary, #5B5BD6);
  color: #fff;
  animation: fdeQrPulse 1.15s ease-out 2;
}
.fde-hero__card.is-qr-highlight .fde-hero__card-head { color: #fff; }
.fde-hero__card.is-qr-highlight .fde-hero__card-dot { background: #fff; box-shadow: 0 0 0 3px rgba(255, 255, 255, .28); }
.fde-hero__card.is-qr-highlight .fde-hero__wx-tip { color: rgba(255, 255, 255, .86); }
.fde-hero__card.is-qr-highlight .fde-hero__wx-link { background-image: linear-gradient(90deg, #fff 0 8px, transparent 8px 16px); opacity: .5; }
@keyframes fdeQrPulse {
  0% { box-shadow: 0 20px 50px -28px rgba(11, 11, 18, .25), 0 0 0 0 rgba(91, 91, 214, .45); }
  70% { box-shadow: 0 20px 50px -28px rgba(11, 11, 18, .25), 0 0 0 16px rgba(91, 91, 214, 0); }
  100% { box-shadow: 0 20px 50px -28px rgba(11, 11, 18, .25), 0 0 0 0 rgba(91, 91, 214, 0); }
}
[data-theme="dark"] .fde-hero__card.is-qr-highlight { background: #4a48c9; border-color: var(--color-primary, #5B5BD6); }
@media (prefers-reduced-motion: reduce) {
  .fde-hero__card.is-qr-highlight { animation: none; }
}
.fde-hero__card-head {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; color: var(--color-primary);
  letter-spacing: .04em; text-transform: uppercase; margin-bottom: 16px;
}
.fde-hero__card-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-primary); box-shadow: 0 0 0 3px rgba(91, 91, 214, .18);
}
.fde-hero__wx { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.fde-hero__wx-qrbox {
  flex: 0 0 auto; display: block; padding: 8px 18px; background: #fff;
  border: 1px solid var(--color-border); border-radius: 16px;
  transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
}
.fde-hero__wx-qr-img { display: block; width: 120px; height: 120px; object-fit: contain; }
.fde-hero__wx-link {
  flex: 1 1 auto; height: 2px; border-radius: 2px;
  background-image: linear-gradient(90deg, var(--color-primary) 0 8px, transparent 8px 16px);
  background-size: 16px 2px; background-repeat: repeat-x; opacity: .5;
  animation: wxDash 1.1s linear infinite;
}
@keyframes wxDash { to { background-position-x: -16px; } }
.fde-hero__wx-robot {
  flex: 0 0 auto; width: 116px; height: auto; object-fit: contain;
  transform-origin: bottom center; animation: wxRobotBob 3.2s ease-in-out infinite;
  filter: drop-shadow(0 8px 16px rgba(11, 11, 18, .16));
}
@keyframes wxRobotBob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
.fde-hero__wx-tip {
  margin: 14px 0 0; font-size: 13px; color: var(--color-text-2);
  text-align: center; line-height: 1.5;
}
.fde-hero__card:hover .fde-hero__wx-qrbox {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(91, 91, 214, .10), 0 12px 26px -14px rgba(91, 91, 214, .4);
  transform: scale(1.04);
}
.fde-hero__card:hover .fde-hero__wx-robot {
  animation-play-state: paused; transform: translateX(-6px) rotate(-5deg);
}
@media (prefers-reduced-motion: reduce) {
  .fde-hero__wx-link, .fde-hero__wx-robot { animation: none; }
}

/* ---------- 正文 iframe 实时镜像 ---------- */
.fde-mirror__bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; margin-bottom: 28px;
}
.fde-mirror__bar .fde-provider { margin-bottom: 0; }
.fde-iframe-wrap {
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  overflow: hidden; background: #fff; box-shadow: var(--shadow-xs);
}
.fde-iframe { display: block; width: 100%; height: 1800px; border: 0; }
.fde-mirror__note {
  margin: 18px 0 0; font-size: 13px; color: var(--color-text-3); line-height: 1.7;
  background: var(--color-info-bg); border: 1px solid #cfe2f7;
  border-left: 4px solid var(--color-info);
  border-radius: var(--radius-sm); padding: 12px 16px;
}
.fde-mirror__note strong { color: var(--color-info); }

/* ---------- 出品方 + 说明 ---------- */
.fde-provider {
  display: flex; align-items: center; gap: 16px;
  padding: 18px 20px; margin-bottom: 18px;
  background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.fde-provider__logo {
  width: 52px; height: 52px; border-radius: 12px; object-fit: cover;
  flex-shrink: 0; background: var(--color-surface-2);
}
.fde-provider h3 { font-size: 16px; margin: 0 0 4px; }
.fde-provider p { margin: 0; font-size: 13px; color: var(--color-text-3); line-height: 1.6; }

.fde-note {
  padding: 14px 18px; margin-bottom: 36px;
  background: var(--color-info-bg); border: 1px solid #cfe2f7;
  border-left: 4px solid var(--color-info);
  border-radius: var(--radius-sm);
  font-size: 14px; color: var(--color-text-2); line-height: 1.7;
}
.fde-note strong { color: var(--color-info); }

/* ---------- 章节手风琴 ---------- */
.fde-chapters { display: flex; flex-direction: column; gap: 16px; }
.fde-chapter {
  background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--ease), border-color var(--ease);
}
.fde-chapter:hover { box-shadow: var(--shadow-md); border-color: var(--color-border-strong); }
.fde-chapter__summary {
  display: flex; align-items: center; gap: 14px;
  padding: 20px 24px; cursor: pointer; list-style: none;
  user-select: none;
}
.fde-chapter__summary::-webkit-details-marker { display: none; }
.fde-chapter__no {
  font-size: 13px; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  padding: 6px 12px; border-radius: 999px; flex-shrink: 0; white-space: nowrap;
}
.fde-chapter__title { font-size: 18px; font-weight: 600; flex: 1; }
.fde-chapter__count {
  font-size: 13px; color: var(--color-text-3); flex-shrink: 0; margin-right: 4px;
}
.fde-chapter__caret {
  color: var(--color-text-3); transition: transform var(--ease); flex-shrink: 0;
}
.fde-chapter[open] .fde-chapter__caret { transform: rotate(180deg); }

.fde-lessons {
  padding: 4px 14px 14px;
  border-top: 1px solid var(--color-border);
  display: flex; flex-direction: column;
}
.fde-lesson {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 10px; border-bottom: 1px solid var(--color-border);
  color: var(--color-text); transition: background var(--ease);
}
.fde-lesson:last-child { border-bottom: 0; }
.fde-lesson:hover { background: var(--color-surface); }
.fde-lesson__no {
  width: 30px; height: 30px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px; background: var(--color-surface-2);
  font-size: 13px; font-weight: 600; color: var(--color-text-2);
}
.fde-lesson__title { flex: 1; font-size: 15px; line-height: 1.5; }
.fde-lesson__label {
  font-size: 12px; color: var(--color-text-3);
  background: var(--color-surface-2); padding: 3px 9px; border-radius: 999px; flex-shrink: 0;
}
.fde-lesson__watch {
  flex-shrink: 0; font-size: 14px; font-weight: 600; color: var(--color-primary);
  display: inline-flex; align-items: center; gap: 2px;
}
.fde-lesson:hover .fde-lesson__watch { color: var(--color-primary-hover); }

/* ---------- 暗色主题 ---------- */
html[data-theme="dark"] .fde-hero {
  background:
    radial-gradient(1100px 420px at 12% -20%, rgba(91, 91, 214, .22), transparent 60%),
    radial-gradient(900px 380px at 92% 0%, rgba(242, 107, 58, .18), transparent 60%),
    var(--color-ink-soft);
  border-color: var(--color-ink-line);
}
html[data-theme="dark"] .fde-badge { background: rgba(91, 91, 214, .22); color: #c9c9ff; }
html[data-theme="dark"] .fde-meta__item { background: var(--color-ink-soft); border-color: var(--color-ink-line); color: var(--color-ink-text-2); }
html[data-theme="dark"] .fde-provider { background: var(--color-ink-soft); border-color: var(--color-ink-line); }
html[data-theme="dark"] .fde-provider p { color: var(--color-ink-text-3); }
html[data-theme="dark"] .fde-note { background: rgba(18, 80, 143, .2); border-color: rgba(18, 80, 143, .5); color: var(--color-ink-text-2); }
html[data-theme="dark"] .fde-chapter { background: var(--color-ink-soft); border-color: var(--color-ink-line); }
html[data-theme="dark"] .fde-chapter__title { color: #fff; }
html[data-theme="dark"] .fde-lesson { color: var(--color-ink-text-2); border-color: var(--color-ink-line); }
html[data-theme="dark"] .fde-lesson:hover { background: rgba(255, 255, 255, .05); }
html[data-theme="dark"] .fde-lesson__no { background: rgba(255, 255, 255, .08); color: var(--color-ink-text-2); }
html[data-theme="dark"] .fde-lesson__label { background: rgba(255, 255, 255, .08); color: var(--color-ink-text-3); }
html[data-theme="dark"] .fde-lessons { border-color: var(--color-ink-line); }
html[data-theme="dark"] .fde-hero__card { background: var(--color-ink-soft); border-color: var(--color-ink-line); }
html[data-theme="dark"] .fde-hero__card-label { color: #c9c9ff; }
html[data-theme="dark"] .fde-hero__wx-qrbox { background: var(--color-ink-soft); border-color: var(--color-ink-line); }
html[data-theme="dark"] .fde-hero__wx-tip { color: var(--color-ink-text-2); }
html[data-theme="dark"] .fde-iframe-wrap { background: var(--color-ink-soft); border-color: var(--color-ink-line); }
html[data-theme="dark"] .fde-mirror__note { background: rgba(18, 80, 143, .2); border-color: rgba(18, 80, 143, .5); color: var(--color-ink-text-2); }
html[data-theme="dark"] .fde-mirror__note strong { color: #6db4ff; }

@media (max-width: 900px) {
  .fde-hero__inner { grid-template-columns: 1fr; gap: 28px; }
  .fde-hero__card { max-width: 420px; }
}
@media (max-width: 640px) {
  .fde-hero { padding: 44px 0 40px; }
  .fde-hero__card { max-width: none; }
  .fde-iframe { height: 1300px; }
  .fde-chapter__summary { padding: 16px; gap: 10px; }
  .fde-chapter__count { display: none; }
  .fde-lesson { gap: 10px; padding: 12px 6px; }
  .fde-lesson__label { display: none; }
}