:root {
  --bg: #f6f0e7;
  --card: rgba(255,255,255,0.82);
  --text: #2a2019;
  --muted: #7a6b5f;
  --line: rgba(60,42,30,0.12);
  --accent: #6b4a35;
  --accent-dark: #4b3325;
  --danger: #9b2d20;
  --shadow: 0 18px 45px rgba(58,39,24,0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 0%, rgba(255,255,255,0.8), transparent 34%),
    linear-gradient(135deg, #f9f2e7 0%, #efe2d3 100%);
  min-height: 100vh;
}

.page {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0 64px;
}

.hero {
  text-align: center;
  margin-bottom: 28px;
}

.site-logo {
  display: block;
  width: 86px;
  max-width: 86px;
  height: auto;
  margin: 0 auto 16px;
  object-fit: contain;
}

.brand {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.08em;
  background: rgba(255,255,255,0.48);
}

h1 {
  font-size: clamp(28px, 5vw, 46px);
  margin: 18px 0 10px;
  letter-spacing: -0.03em;
}

.hero p,
.hint,
#packageDesc,
.player-note {
  color: var(--muted);
  line-height: 1.7;
}

.card,
.course {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 24px;
  backdrop-filter: blur(14px);
}

.code-card {
  padding: 24px;
  max-width: 680px;
  margin: 0 auto;
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: 10px;
}

.input-row {
  display: flex;
  gap: 12px;
}

input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 16px;
  background: rgba(255,255,255,0.9);
  outline: none;
}

input:focus {
  border-color: rgba(107,74,53,0.45);
  box-shadow: 0 0 0 4px rgba(107,74,53,0.08);
}

button {
  border: 0;
  border-radius: 14px;
  padding: 14px 20px;
  font-weight: 700;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  white-space: nowrap;
}

button:hover {
  background: var(--accent-dark);
}

button.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--line);
}

.message {
  margin-top: 10px;
  color: var(--danger);
  min-height: 24px;
}

.hidden {
  display: none !important;
}

.course {
  padding: 24px;
}

.course-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
  margin-bottom: 20px;
}

.course-head h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.course-head p {
  margin: 0;
}

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  align-items: start;
}

.video-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.video-item {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255,255,255,0.56);
  cursor: pointer;
  transition: 0.18s ease;
}

.video-item:hover,
.video-item.active {
  border-color: rgba(107,74,53,0.35);
  background: rgba(255,255,255,0.9);
  transform: translateY(-1px);
}

.video-item.active {
  box-shadow: 0 12px 26px rgba(83,57,38,0.12);
}

.video-item strong {
  display: block;
  margin-bottom: 6px;
}

.video-item span {
  color: var(--muted);
  font-size: 13px;
}

.video-item .progress-hint {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  line-height: 1.4;
  color: rgba(107, 74, 53, 0.68);
  font-style: normal;
}

.player-card {
  min-width: 0;
  border: 1px solid rgba(60,42,30,0.1);
  border-radius: 22px;
  background: rgba(255,255,255,0.5);
  padding: 16px;
}

.player-title {
  font-weight: 800;
  margin-bottom: 12px;
  font-size: 18px;
  line-height: 1.4;
}

video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #17130f;
  border-radius: 20px;
  display: block;
}

.player-note {
  margin: 12px 0 0;
  font-size: 14px;
}

/* 未选择视频时的高级提示状态 */

.course.waiting-to-play .player-card {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    radial-gradient(circle at 20% 18%, rgba(161, 112, 72, 0.16), transparent 32%),
    radial-gradient(circle at 82% 76%, rgba(96, 65, 42, 0.12), transparent 34%),
    linear-gradient(135deg, #fffaf3 0%, #f5eadc 100%);
  border: 1px solid rgba(116, 80, 50, 0.14);
}

.course.waiting-to-play .player-card::before {
  content: "▶";
  width: 72px;
  height: 72px;
  margin: 0 auto 22px;
  border-radius: 28px;
  display: grid;
  place-items: center;
  padding-left: 4px;
  background: rgba(82, 52, 32, 0.92);
  color: #fff8ee;
  font-size: 28px;
  box-shadow: 0 18px 42px rgba(88, 58, 37, 0.22);
}

.course.waiting-to-play #playerTitle {
  max-width: 420px;
  margin: 0 auto 12px;
  text-align: center;
  font-size: 26px;
  line-height: 1.3;
  color: #4b301f;
  letter-spacing: -0.5px;
}

.course.waiting-to-play #playerNote {
  max-width: 440px;
  margin: 0 auto;
  text-align: center;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(83, 57, 38, 0.72);
}

.course.waiting-to-play video {
  display: none !important;
}

/* 手机端：播放器在上，列表在下 */

@media (max-width: 800px) {
  .page {
    width: min(100% - 24px, 1080px);
    padding: 24px 0 40px;
  }

  .site-logo {
    position: static !important;
    display: block !important;
    width: 68px !important;
    max-width: 68px !important;
    height: auto !important;
    margin: 0 auto 12px !important;
    transform: none !important;
    z-index: auto !important;
  }

  .hero {
    margin-bottom: 22px;
  }

  h1 {
    font-size: 32px;
    line-height: 1.18;
    margin: 12px 0 12px;
    letter-spacing: -1px;
  }

  .hero p,
  .hint {
    font-size: 15px;
    line-height: 1.7;
  }

  .input-row,
  .course-head {
    flex-direction: column;
  }

  button {
    width: 100%;
  }

  .course {
    padding: 16px;
    border-radius: 22px;
  }

  .course-head {
    gap: 12px;
    padding-bottom: 14px;
    margin-bottom: 16px;
  }

  .course-head h2 {
    font-size: 22px;
  }

  .layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .player-card {
    order: -1;
    padding: 12px;
    border-radius: 20px;
    background: rgba(255,255,255,0.62);
  }

  .player-title {
    font-size: 17px;
    margin-bottom: 10px;
  }

  video {
    border-radius: 16px;
  }

  .player-note {
    font-size: 13px;
    line-height: 1.7;
  }

  .video-list {
    gap: 10px;
  }

  .video-item {
    border-radius: 16px;
    padding: 14px;
  }

  .course.waiting-to-play .player-card {
    min-height: 260px;
  }

  .course.waiting-to-play .player-card::before {
    width: 58px;
    height: 58px;
    border-radius: 22px;
    font-size: 22px;
    margin-bottom: 16px;
  }

  .course.waiting-to-play #playerTitle {
    font-size: 22px;
  }

  .course.waiting-to-play #playerNote {
    font-size: 14px;
    max-width: 300px;
  }
}
.course-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* 钩织库按钮（强化视觉） */
.primary-btn {
  background: var(--accent);
  color: #fff !important;
  border: 1px solid var(--accent);
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(107, 74, 53, 0.18);
  transition: all 0.2s ease;
}

.primary-btn:hover {
  transform: translateY(-1px);
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

/* PC端按钮统一尺寸 */
.course-actions .ghost {
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 13px;
}

/* 手机端优化（重点） */
@media (max-width: 800px) {

  .course-actions {
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
  }

  .course-actions .ghost,
  .course-actions .primary-btn {
    flex: 1;
    text-align: center;
  }

}
/* =========================
   钩织库详情页 Header 修复
   ========================= */

.library-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
}

.library-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.library-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  color: #2a2019;
}

.library-subtitle {
  margin: 0;
  font-size: 13px;
  color: #7a6b5f;
}

/* 返回按钮（你刚才看不到的核心修复点） */
.back-btn {
  background: transparent;
  border: 1px solid rgba(60,42,30,0.15);
  color: #4b3325;   /* 👈 关键：不是白色了 */
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
}
/* ===== 钩织库 header（和原型一致） ===== */

.library-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
}

.library-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.library-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  color: #2a2019;
}

.library-subtitle {
  margin: 0;
  font-size: 13px;
  color: #7a6b5f;
}

.back-btn {
  background: transparent;
  border: 1px solid rgba(60,42,30,0.15);
  color: #4b3325;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
}
/* detail页专用微调 */
.detail-library-header {
  margin-bottom: 22px;
  padding-top: 4px;
}
.detail-header-fixed {
  padding: 16px 0;
  margin-bottom: 18px;
}