/* ============================================================
   HOMEPAGE CSS — 首页专属样式
   依赖: shared.css (CSS Variables/Header/Nav/Footer/公共组件)
   ============================================================ */

/* ============================================================
   HERO
   ============================================================ */
.hero {
  height: 420px;
  position: relative; overflow: hidden;
  border-bottom: 4px solid var(--blue-500);
  box-shadow: inset 0 -20px 40px rgba(0,0,0,.08);
  background: rgba(235,243,252,.5);
}
/* 背景轮播层 */
.hero .hero-bg-slider {
  display: flex; width: 300%; height: 100%;
  animation: heroSlide 5s ease-in-out infinite;
}
.hero .hero-bg-img {
  flex: 0 0 33.333%;
  background-size: cover; background-position: center;
  background-repeat: no-repeat;
}
@keyframes heroSlide {
  0%   { transform: translateX(0); }
  38%  { transform: translateX(0); }
  48%  { transform: translateX(-33.333%); }
  88%  { transform: translateX(-33.333%); }
  98%  { transform: translateX(-66.667%); }
  100% { transform: translateX(-66.667%); }
}

/* ============================================================
   SERVICE NAV — 服务导航
   ============================================================ */
.service-nav {
  background: var(--surface-gradient);
  border-bottom: 1px solid var(--border);
  padding: 10px 0; margin-top: 6px;
  box-shadow: var(--shadow-sm);
  position: relative; z-index: 5;
}
.service-nav .container { display: flex; align-items: center; gap: var(--spacing-lg); }
.service-nav .sn-label {
  flex-shrink: 0; font-size: var(--text-base); font-weight: 700; color: var(--text);
  padding-right: var(--spacing-lg); border-right: 1px solid var(--border);
  display: flex; align-items: center; gap: var(--spacing-xs);
}
.service-nav .sn-label::before { content: ''; width: 3px; height: 16px; background: var(--primary); border-radius: 2px; }
.service-nav .sn-items { flex: 1; display: flex; }
.service-nav .sn-item {
  flex: 1; text-align: center; padding: 4px var(--spacing-md);
  cursor: pointer; transition: all var(--transition); color: var(--text-secondary);
  position: relative; border-radius: var(--radius);
}
.service-nav .sn-item + .sn-item::after {
  content: ''; position: absolute; left: 0; top: 50%; transform: translate(-50%,-50%);
  width: 1px; height: 24px; background: var(--border-light);
}
.service-nav .sn-item:hover {
  color: var(--primary); background: var(--primary-light);
  transform: translateY(-1px);
}
.service-nav .sn-item .sn-icon {
  width: 32px; height: 32px; margin: 0 auto 4px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 19px;
  transition: background var(--transition), transform var(--transition);
}
.service-nav .sn-item .sn-icon svg {
  width: 20px; height: 20px; display: block;
}
.service-nav .sn-item:nth-child(1) .sn-icon { background: #DBEAFE; color: #2563EB; }
.service-nav .sn-item:nth-child(2) .sn-icon { background: #D1FAE5; color: #059669; }
.service-nav .sn-item:nth-child(3) .sn-icon { background: #FED7AA; color: #EA580C; }
.service-nav .sn-item:nth-child(4) .sn-icon { background: #EDE9FE; color: #7C3AED; }
.service-nav .sn-item:nth-child(5) .sn-icon { background: #FEE2E2; color: #E11D48; }
.service-nav .sn-item:hover .sn-icon { transform: scale(1.1); }
.service-nav .sn-item .sn-title { font-size: var(--text-sm); font-weight: 600; margin-bottom: 1px; }
.service-nav .sn-item .sn-desc { font-size: 13px; color: var(--text-muted); }

/* ============================================================
   COURSE CARD
   ============================================================ */
.course-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--spacing-md);
}
.course-card {
  background: var(--surface-gradient);
  border: 1px solid var(--border);
  border-top: 1px solid rgba(255,255,255,.9);
  border-radius: var(--radius-lg);
  overflow: hidden; cursor: pointer;
  display: flex; flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  box-shadow: var(--shadow-xs);
  animation: fadeInStagger .5s ease both;
}
.course-card:nth-child(1) { animation-delay: .05s; }
.course-card:nth-child(2) { animation-delay: .10s; }
.course-card:nth-child(3) { animation-delay: .15s; }
.course-card:nth-child(4) { animation-delay: .20s; }
.course-card:nth-child(5) { animation-delay: .25s; }
.course-card:hover {
  border-color: var(--primary-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.course-card .card-img {
  height: 140px; position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.course-card .card-img .img-placeholder { font-size: 56px; transition: transform var(--transition-slow); }
.course-card:hover .card-img .img-placeholder { transform: scale(1.08); }
.course-card .card-img .card-tag {
  position: absolute; top: 0; left: 0; border-radius: 0 0 var(--radius-sm) 0;
  padding: 3px 10px; font-size: 12px; font-weight: 600; color: #fff;
}
.card-tag.public { background: var(--primary); }
.card-tag.prof   { background: #5B4DA7; }
.card-tag.exam   { background: var(--red); }

.course-card .card-body {
  padding: var(--spacing-md);
  display: flex; flex-direction: column; flex: 1; min-width: 0;
}
.course-card .card-title {
  font-size: var(--text-base); font-weight: 600; color: var(--text);
  margin-bottom: 6px; line-height: 1.4;
  transition: color var(--transition);
  position: relative;
}
.course-card .card-title span {
  display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.course-card:hover .card-title { color: var(--primary); }
.course-card .card-meta {
  font-size: var(--text-xs); color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  display: flex; align-items: flex-start; gap: var(--spacing-sm);
}
.course-card .card-meta span {
  min-width: 0; max-width: 100%;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.card-meta .card-year {
  display: inline-block;
  position: relative;
  padding: 1px 6px; font-size: 11px; font-weight: 600;
  background: #EBF3FC; color: #2E72C2;
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-sm);
  line-height: 1.6;
  vertical-align: middle; box-sizing: border-box;
}
/* 分隔竖杠：定位到 card-year 边框左侧外，不被填充色框入（仅水平模式，堆叠模式无分隔线） */
.course-card .card-meta:not(.card-meta-stacked) .card-year::before {
  content: '|';
  position: absolute;
  right: calc(100% + 4px);
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-300);
}
.course-card .card-meta > * + *::before {
  content: '|'; color: var(--gray-300); margin-right: var(--spacing-sm);
}
/* 堆叠模式 — 无分隔线，每项独立一行 */
.course-card .card-meta-stacked {
  flex-direction: column; gap: 2px;
}
.course-card .card-meta-stacked span {
  width: 100%; min-width: 0;
}
/* badge 药丸：不被整行撑满，填充色/边框只包住 label 文字（有多少字填多少） */
.course-card .card-meta-stacked .card-year {
  width: auto;
}
.course-card .card-meta-stacked > * + *::before {
  content: none;
}
/* 课时独立行（标题下方，专业课程卡） */
.course-card .card-hour {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.course-card .card-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: var(--spacing-sm);
  margin-top: auto;
  border-top: 1px solid var(--border-light);
}
.course-card .card-price { font-size: var(--text-lg); color: var(--danger); font-weight: 700; }
.course-card .card-price .unit { font-size: var(--text-xs); font-weight: 400; }

/* 卡片"立即购买"：小巧圆润，悬停变蓝渐变胶囊 + 上浮 + 阴影 */
.course-card .card-buy {
  display: inline-flex; align-items: center; gap: 3px;
  padding: 3px 10px;
  color: var(--primary); font-weight: 600;
  font-size: var(--text-sm);
  border: 1px solid transparent; border-radius: 999px;
  transition: all var(--transition);
  white-space: nowrap;
}
.course-card .card-buy:hover {
  background: linear-gradient(180deg, var(--blue-400), var(--primary));
  border-color: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
/* 课程卡底部右侧操作组（加入购物车 / 立即购买） */
.course-card .card-actions {
  display: flex; align-items: center; gap: 2px;
}

/* 课程封面底色 */
.course-card .card-img.cat-public { background: linear-gradient(160deg, #EFF3FA 0%, #E3ECF7 100%); }
.course-card .card-img.cat-prof   { background: linear-gradient(160deg, #F3F1FA 0%, #E9E5F5 100%); }
.course-card .card-img.cat-exam   { background: linear-gradient(160deg, #FFF7ED 0%, #FFF0E0 100%); }

/* ============================================================
   INFO PANELS
   ============================================================ */
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
.info-card {
  background: var(--surface-gradient);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--transition), transform var(--transition);
}
.info-card:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }
.info-card .info-header {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--gray-50);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.info-card .info-header h4 {
  font-size: var(--text-lg); font-weight: 600;
  display: flex; align-items: center; gap: var(--spacing-sm);
}
.info-card .info-header h4::before {
  content: ''; width: 3px; height: 16px; background: var(--primary); border-radius: 1px;
}
.info-card .info-body { padding: var(--spacing-xs) var(--spacing-lg); }
.info-card .info-body .info-item {
  display: flex; align-items: center; gap: var(--spacing-sm);
  padding: 10px 0; border-bottom: 1px solid var(--border-light);
  font-size: var(--text-sm);
  transition: padding-left var(--transition);
}
.info-card .info-body .info-item:hover { padding-left: 4px; }
.info-card .info-body .info-item:last-child { border-bottom: none; }
.info-card .info-body .info-item a { color: var(--text); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: color var(--transition); }
.info-card .info-body .info-item a:hover { color: var(--primary); }
.info-card .info-body .info-item .info-date { color: var(--text-muted); font-size: var(--text-xs); flex-shrink: 0; }
.info-tag-new {
  color: var(--red); border: 1px solid var(--red); border-radius: 2px;
  font-size: 12px; font-weight: 700; padding: 0 4px; flex-shrink: 0;
}

/* 证书查询 — 深蓝底可折叠，展开切白底 */
#certVerify { scroll-margin-top: 25vh; }
.cert-query-card {
  background:
    linear-gradient(165deg, rgba(42,112,192,.45) 0%, rgba(30,80,130,.5) 100%),
    url(../images/cert_bg.jpg) top center / 100% auto no-repeat;
  background-color: #005faf; /* 图片未覆盖区域的兜底色 */
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg) var(--spacing-md) var(--spacing-sm);
  text-align: center;
  cursor: pointer;
  transition: background .4s ease, box-shadow var(--transition-slow), padding var(--transition-slow);
  position: relative;
}
.cert-query-card:hover,
.cert-query-card:focus-within,
.cert-query-card.is-filled {
  background:
    linear-gradient(to bottom, rgba(30,80,140,.55) 0%, rgba(42,112,192,.25) 30%, #fff 55%),
    url(../images/cert_bg.jpg) top center / 100% auto no-repeat;
  box-shadow: var(--shadow-lg);
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}
.cert-query-card .cq-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border-radius: 50%;
  background: rgba(255,255,255,.15);
  margin-bottom: var(--spacing-xs);
  transition: background .4s ease, transform var(--transition-slow);
}
.cert-query-card:hover .cq-icon,
.cert-query-card:focus-within .cq-icon,
.cert-query-card.is-filled .cq-icon {
  background: var(--primary-light);
  transform: scale(1.08);
}
.cert-query-card .cq-icon svg { width: 22px; height: 22px; stroke: #fff; transition: stroke .4s ease; }
.cert-query-card:hover .cq-icon svg,
.cert-query-card:focus-within .cq-icon svg,
.cert-query-card.is-filled .cq-icon svg { stroke: var(--primary); }
.cert-query-card .cq-title {
  font-size: var(--text-md); font-weight: 700; color: #fff;
  margin-bottom: 0;
  transition: color .4s ease;
  text-shadow: 0 1px 3px rgba(0,0,0,.35);
}
.cert-query-card:hover .cq-title,
.cert-query-card:focus-within .cq-title,
.cert-query-card.is-filled .cq-title { color: #fff; }
.cert-query-card .cq-hint {
  font-size: var(--text-xs); color: #fff;
  display: flex; align-items: center; justify-content: center; gap: 4px;
  transition: color .4s ease;
  text-shadow: 0 1px 3px rgba(0,0,0,.35);
}
.cert-query-card:hover .cq-hint,
.cert-query-card:focus-within .cq-hint,
.cert-query-card.is-filled .cq-hint { opacity: 0; visibility: hidden; }
.cert-query-card .cq-hint .cq-chevron {
  display: inline-block; transition: transform var(--transition-slow);
}
.cert-query-card:hover .cq-hint .cq-chevron,
.cert-query-card:focus-within .cq-hint .cq-chevron,
.cert-query-card.is-filled .cq-hint .cq-chevron {
  transform: rotate(180deg);
}
/* 可折叠区域 */
.cert-query-card .cq-expand {
  max-height: 0; opacity: 0; overflow: hidden;
  transition: max-height .45s ease, opacity .35s ease, margin .35s ease;
  margin-top: 0;
}
.cert-query-card:hover .cq-expand,
.cert-query-card:focus-within .cq-expand,
.cert-query-card.is-filled .cq-expand {
  max-height: 380px; opacity: 1; margin-top: var(--spacing-lg);
}
.cert-query-card .cq-form {
  max-width: 480px; margin: 0 auto; text-align: left;
  display: flex; flex-direction: column; gap: var(--spacing-md);
}
.cert-query-card .cq-form .cq-fields {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-md);
}
.cert-query-card .cq-form .cq-field {
  display: flex; flex-direction: column; gap: 4px;
}
.cert-query-card .cq-form .cq-field.full { grid-column: 1 / -1; }
.cert-query-card .cq-form .cq-field label {
  font-size: var(--text-sm); font-weight: 600; color: var(--text-secondary);
}
.cert-query-card .cq-form .cq-field input {
  height: 44px; padding: 0 14px;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: var(--text-sm); outline: none; color: var(--text);
  background: var(--gray-50); transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
.cert-query-card .cq-form .cq-field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(56,132,220,.12);
  background: #fff;
}
.cert-query-card .cq-form .cq-field input::placeholder { color: var(--gray-400); }
.cert-query-card .cq-form .cq-captcha-row {
  display: flex; gap: var(--spacing-sm);
}
.cert-query-card .cq-form .cq-captcha-row input {
  flex: 1; min-width: 0; width: auto !important;
}
.cert-query-card .cq-form .cq-captcha-img {
  height: 44px; width: 100px; flex-shrink: 0; border-radius: var(--radius);
  border: 1px solid var(--border); cursor: pointer;
  background: linear-gradient(135deg, #F0F2F5 0%, #E8EAF0 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700; color: var(--text-muted);
  font-family: "Comic Sans MS", "KaiTi", cursive; letter-spacing: 3px;
  user-select: none; transition: border-color var(--transition);
}
.cert-query-card .cq-form .cq-captcha-img:hover { border-color: var(--primary); }
/* validateCode tag 生成的验证码图片和刷新链接 */
.cert-query-card .cq-form .cq-captcha-row img {
  height: 44px; width: 100px; flex-shrink: 0; border-radius: var(--radius);
  border: 1px solid var(--border); cursor: pointer;
  object-fit: contain;
}
.cert-query-card .cq-form .cq-captcha-row a {
  font-size: var(--text-xs); color: var(--text-secondary);
  display: flex; align-items: center; white-space: nowrap;
  transition: color var(--transition);
}
.cert-query-card .cq-form .cq-captcha-row a:hover { color: var(--primary); }
.cert-query-card .cq-form .cq-btn {
  height: 46px; width: 100%; border: none; border-radius: var(--radius);
  background: linear-gradient(180deg, var(--blue-400) 0%, var(--primary) 100%);
  color: #fff; font-size: var(--text-base); font-weight: 600;
  cursor: pointer; letter-spacing: 2px;
  box-shadow: 0 1px 3px rgba(0,0,0,.1), inset 0 1px 0 rgba(255,255,255,.15);
  transition: all var(--transition);
}
.cert-query-card .cq-form .cq-btn:hover {
  background: linear-gradient(180deg, var(--primary) 0%, var(--blue-600) 100%);
  transform: translateY(-1px); box-shadow: 0 2px 8px rgba(0,0,0,.15), inset 0 1px 0 rgba(255,255,255,.1);
  letter-spacing: 4px;
}
.cert-query-card .cq-footer-note {
  margin-top: var(--spacing-lg); font-size: var(--text-xs); color: var(--text-muted);
}

/* ============================================================
   CERT RESULT — 证书查询结果弹窗
   ============================================================ */
.cert-result { padding: 4px 0; }
.cert-result .cr-hero {
  text-align: center; padding: var(--spacing-md) 0 var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--spacing-md);
}
.cert-result .cr-hero .cr-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 16px; border-radius: 20px;
  background: #D1FAE5; color: #059669;
  font-size: var(--text-sm); font-weight: 600;
  margin-bottom: var(--spacing-md);
}
.cert-result .cr-hero .cr-badge svg { display: block; }
.cert-result .cr-hero .cr-name {
  font-size: 22px; font-weight: 700; color: var(--text);
  margin-bottom: var(--spacing-xs);
}
.cert-result .cr-hero .cr-cert-no {
  font-size: var(--text-sm); color: var(--text-secondary);
  font-family: "SF Mono","Consolas","Menlo",monospace;
  letter-spacing: .5px;
}
.cert-result .cr-body {
  background: var(--gray-50); border-radius: var(--radius);
  padding: var(--spacing-sm) var(--spacing-md);
}
.cert-result .cr-body .cr-field {
  display: flex; align-items: flex-start; padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
}
.cert-result .cr-body .cr-field:last-child { border-bottom: none; }
.cert-result .cr-body .cr-field label {
  flex-shrink: 0; width: 76px; font-size: var(--text-sm);
  font-weight: 600; color: var(--text-secondary);
}
.cert-result .cr-body .cr-field span {
  flex: 1; font-size: var(--text-sm); color: var(--text);
  line-height: 1.6; word-break: break-all;
}
.cert-result .cr-body .cr-field .cr-hours {
  color: var(--primary); font-weight: 700;
}
/* 已学课程 — 多课程标签 */
.cert-result .cr-body .cr-field.cr-field-courses {
  flex-wrap: wrap;
}
.cert-result .cr-body .cr-course-tags {
  flex: 1; display: flex; flex-wrap: wrap; gap: 6px;
}
.cert-result .cr-body .cr-course-tag {
  display: inline-block; padding: 2px 10px;
  background: #fff; border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 12px; color: var(--text-secondary);
  white-space: nowrap; line-height: 1.6;
  transition: border-color var(--transition);
}
.cert-result .cr-body .cr-course-tag:hover {
  border-color: var(--primary-border); color: var(--text);
}
.cert-result .cr-source {
  text-align: center; padding-top: var(--spacing-sm);
  font-size: 12px; color: var(--text-muted);
}

/* 未查到 */
.cert-empty {
  text-align: center; padding: var(--spacing-2xl) var(--spacing-lg);
}
.cert-empty .ce-icon {
  width: 52px; height: 52px; margin: 0 auto var(--spacing-md);
  border-radius: 50%; background: var(--gray-100);
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-400);
}
.cert-empty .ce-icon svg { width: 26px; height: 26px; display: block; }
.cert-empty .ce-title { font-size: var(--text-md); font-weight: 600; color: var(--text); margin-bottom: var(--spacing-xs); }
.cert-empty .ce-desc { font-size: var(--text-sm); color: var(--text-muted); }

/* ============================================================
   CUSTOM MODAL — 自定义弹窗（替代jBox）
   ============================================================ */
.custom-modal-overlay {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .25s ease, visibility .25s ease;
}
.custom-modal-overlay.active {
  opacity: 1; visibility: visible; pointer-events: auto;
}
.cm-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.42);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.cm-card {
  position: relative; z-index: 1;
  width: 480px; max-width: 92vw;
  background: #fff; border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,.15), 0 0 0 1px rgba(0,0,0,.04);
  transform: translateY(12px) scale(.96);
  transition: transform .3s cubic-bezier(.22,.61,.36,1);
}
.custom-modal-overlay.active .cm-card {
  transform: translateY(0) scale(1);
}
.cm-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
}
.cm-title {
  font-size: var(--text-md); font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: var(--spacing-sm);
}
.cm-title::before {
  content: ''; width: 3px; height: 16px; background: var(--primary); border-radius: 2px;
}
.cm-close {
  width: 28px; height: 28px; display: flex; align-items: center; justify-content: center;
  border: none; background: none; font-size: 20px; color: var(--text-muted);
  cursor: pointer; border-radius: var(--radius); line-height: 1;
  transition: background var(--transition), color var(--transition);
}
.cm-close:hover { background: var(--gray-100); color: var(--text); }
.cm-body { padding: var(--spacing-lg); }
.cm-body .cert-result,
.cm-body .cert-empty { padding: 0; }
.cm-footer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  display: flex; align-items: center; justify-content: center; gap: var(--spacing-sm);
}
.cm-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 120px; padding: 9px 28px;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: var(--text-sm); font-weight: 600; cursor: pointer;
  background: #fff; color: var(--text-secondary);
  transition: all var(--transition);
}
.cm-btn:hover { border-color: var(--gray-300); color: var(--text); }
.cm-btn.primary {
  border-color: transparent;
  background: linear-gradient(180deg, var(--blue-400) 0%, var(--primary) 100%);
  color: #fff; box-shadow: 0 1px 3px rgba(56,132,220,.3);
}
.cm-btn.primary:hover {
  background: linear-gradient(180deg, var(--primary) 0%, var(--blue-700) 100%);
  transform: translateY(-1px); box-shadow: 0 2px 8px rgba(56,132,220,.35);
}
/* alert 专用 */
.cm-body .cm-alert-msg {
  text-align: center; padding: var(--spacing-lg) var(--spacing-md);
  font-size: var(--text-base); color: var(--text); line-height: 1.6;
}

/* ============================================================
   TEACHER LIST — 明星讲师
   ============================================================ */
.teacher-list {
  padding: var(--spacing-2xl) 0;
}
.teacher-list .tl-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}
.teacher-list .tl-header .tl-title {
  font-size: var(--text-2xl); font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: var(--spacing-sm);
  padding-left: 36px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='8' r='4' fill='%233884DC'/%3E%3Cpath d='M4 20c0-4 3.6-7 8-7s8 3 8 7' fill='none' stroke='%233884DC' stroke-width='2.5'/%3E%3C/svg%3E") no-repeat left center;
}
.teacher-list .tl-header .tl-more {
  font-size: var(--text-sm); color: var(--text-secondary);
  cursor: pointer; transition: color var(--transition);
}
.teacher-list .tl-header .tl-more:hover { color: var(--primary); }
.teacher-list .tl-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--spacing-lg);
}
.teacher-list .tl-card {
  position: relative; overflow: hidden; border-radius: var(--radius-lg);
  cursor: pointer; transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-xs); background: var(--surface);
}
.teacher-list .tl-card:hover {
  transform: translateY(-5px); box-shadow: var(--shadow-md);
}
.teacher-list .tl-card img {
  width: 100%; height: 270px; object-fit: cover; display: block;
}
.teacher-list .tl-card .tl-info {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,.7) 100%);
  padding: 40px var(--spacing-md) var(--spacing-md);
}
.teacher-list .tl-card .tl-info .tl-name {
  font-size: 18px; font-weight: 700; color: #fff; text-align: center;
  margin-bottom: 4px;
}
.teacher-list .tl-card .tl-info .tl-dept {
  font-size: var(--text-xs); color: rgba(255,255,255,.8); text-align: center;
}

/* ============================================================
   FRIENDSHIP LINK — 友情链接
   ============================================================ */
.friendship-link {
  padding: var(--spacing-lg) 0 0;
  position: relative;
}
.friendship-link .fl-header {
  text-align: center; position: relative; height: 0; z-index: 2;
}
.friendship-link .fl-header h4 {
  display: inline-block; background: var(--bg);
  padding: 10px 30px; font-size: 18px; font-weight: 700; color: var(--text);
}
.friendship-link .fl-divider {
  border: none; border-top: 1px solid var(--border); margin: 30px 0 20px;
}
.friendship-link .fl-imgs {
  overflow: hidden; margin-bottom: 10px;
}
.friendship-link .fl-imgs li {
  float: left; width: 23%; margin: 1%;
}
.friendship-link .fl-imgs li a {
  display: block; background: #fff; border: 1px solid var(--border);
  transition: border-color var(--transition);
}
.friendship-link .fl-imgs li a:hover { border-color: var(--primary); }
.friendship-link .fl-imgs li a .dummy-img {
  width: 96%; height: 70px; margin: 5px;
  background: var(--gray-100); display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); font-size: var(--text-sm);
}

/* ============================================================
   SMART COURSE SELECTION — 智能选课浮动底栏
   ============================================================ */
.smart-select-bar {
  position: sticky;
  bottom: 0;
  z-index: 90;
  width: 100%;
  background: url(../images/ai_select_course.jpg) center / 100% 100% no-repeat;
  box-shadow: 0 -4px 24px rgba(0,0,0,.18);
  transition: box-shadow var(--transition-slow);
}
.smart-select-bar:hover { box-shadow: 0 -6px 32px rgba(0,0,0,.25); }
.smart-select-bar .ssb-container {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px var(--spacing-md);
  gap: var(--spacing-lg);
}
.smart-select-bar .ssb-left {
  display: flex; flex-direction: column; gap: 2px;
  min-width: 0;
}
.smart-select-bar .ssb-req-item {
  display: flex; align-items: baseline; gap: 0;
  color: #fff;
  line-height: 1.4;
}
.smart-select-bar .ssb-req-item:last-child {
  padding-left: 7.8em;
}
.smart-select-bar .req-label {
  font-size: 17px; font-weight: 500; letter-spacing: 1px;
  color: rgba(255,255,255,.78);
  white-space: nowrap;
}
.smart-select-bar .req-num {
  font-size: 32px; font-weight: 800; letter-spacing: 0;
  color: #FFD54F;
  line-height: 1;
  margin: 0 6px 0 10px;
  text-shadow: 0 2px 6px rgba(0,0,0,.25);
  font-variant-numeric: tabular-nums;
  min-width: 2.2ch; text-align: center;
}
.smart-select-bar .req-unit {
  font-size: 14px; font-weight: 400;
  color: rgba(255,255,255,.6);
  white-space: nowrap;
}
.smart-select-bar .req-bought {
  font-size: 14px; font-weight: 600;
  color: #fff;
  white-space: nowrap;
  margin-left: 10px;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.25);
}
.smart-select-bar .ssb-right {
  display: flex; align-items: center; gap: var(--spacing-md);
  flex-shrink: 0;
}
.smart-select-bar .ssb-btn {
  padding: 13px 32px;
  background: linear-gradient(180deg, #FFE082 0%, #FFD54F 40%, #F9A825 100%);
  color: #3E2700;
  border: none; border-radius: var(--radius);
  font-size: 16px; font-weight: 700; cursor: pointer; letter-spacing: 2px;
  transition: all var(--transition);
  box-shadow: 0 2px 8px rgba(0,0,0,.18), 0 1px 0 rgba(255,255,255,.12) inset;
  white-space: nowrap;
}
.smart-select-bar .ssb-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(0,0,0,.28), 0 1px 0 rgba(255,255,255,.12) inset;
  letter-spacing: 3px;
}
.smart-select-bar .ssb-btn:active { transform: translateY(0); }
/* 功能未上线时的禁用态：置灰 + 禁用指针，hover 不再上浮 */
.smart-select-bar .ssb-btn:disabled,
.smart-select-bar .ssb-btn:disabled:hover {
  background: var(--gray-600); color: var(--gray-300);
  cursor: not-allowed; letter-spacing: 2px;
  box-shadow: none; transform: none;
}
.smart-select-bar .ssb-close {
  width: 30px; height: 30px; border-radius: 50%;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08);
  color: rgba(255,255,255,.4); font-size: 14px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition); flex-shrink: 0;
  line-height: 1;
}
.smart-select-bar .ssb-close:hover { background: rgba(255,255,255,.2); color: #fff; }