* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: #000;
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #fff;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  filter: drop-shadow(0 0 11px rgba(215, 215, 215, 0.33));
}

.header-wrapper {
  display: flex;
  flex-direction: column;
}

.header-top-bar {
  display: none;
}

.header-nav-bar {
  width: 100%;
  max-width: 1443px;
  margin: 0 auto;
  padding: 7px 121px;
  display: flex;
  align-items: center;
  gap: 30px;
  background: #fff;
}

.logo img {
  width: auto;
  height: 32px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 35px;
  margin-left: 100px;
}

.nav-link {
  padding: 8px 0;
  color: #000;
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  white-space: nowrap;
}

.nav-link:hover {
  color: #ad0800;
}

.nav-link.active,
.nav-link[aria-current="page"] {
  color: #ad0800;
  font-weight: 700;
}

.search-container {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.search-box {
  width: 454px;
  height: 38px;
  padding: 2px;
  border: 0;
  border-radius: 11px;
  display: flex;
  align-items: center;
  gap: 0;
  overflow: hidden;
  background: linear-gradient(135deg, #ed6525 0%, #ea1d1d 24%, #b80d0d 100%);
}

.search-inner {
  flex: 1;
  min-width: 0;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
  background: #fff;
  border-radius: 10px;
}

.search-input {
  width: 376px;
  height: 100%;
  margin: 0;
  padding: 0 15px;
  border: 0;
  outline: 0;
  border-radius: 10px;
  color: #000;
  background: transparent;
  font-size: 14px;
}

.search-input::placeholder {
  color: #9f9b9b;
}

.search-btn {
  flex: 1;
  height: 100%;
  padding: 0;
  border: 0;
  color: #fff;
  background: transparent;
  font-size: 15px;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
}

.mobile-logo {
  display: none;
}

.course-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #fff;
  box-shadow: 0 7px 22px rgba(0, 0, 0, 0.06);
}

.course-header-inner {
  max-width: 1600px;
  margin: 0 auto;
}

.course-nav-row {
  height: 60px;
  display: flex;
  align-items: center;
  gap: 48px;
}

.course-logo img {
  width: 126px;
  height: auto;
}

.course-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 46px;
  white-space: nowrap;
  font-size: 18px;
}

.course-nav a:hover {
  color: #c70000;
}

.course-top-search {
  display: flex;
  align-items: center;
  margin-left: auto;
  border: 2px solid #e33a20;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}

.course-top-search input {
  flex: 1;
  min-width: 0;
  height: 100%;
  border: 0;
  outline: 0;
  padding: 0 18px;
  font-size: 15px;
}

.course-top-search button {
  height: 100%;
  border: 0;
  color: #fff;
  font-weight: 400;
  background: linear-gradient(135deg, #d40000, #f05a2b);
  cursor: pointer;
}

.course-mobile-search {
  display: none;
}

.course-page {
  padding: 20px 0 0;
}

.course-main {
  max-width: 1443px;
  margin: 0 auto;
  padding: 0 121px;
  display: flex;
  gap: 35px;
  align-items: start;
}

.course-content {
  width: 900px;
  flex-shrink: 0;
}

.course-breadcrumb,
.course-bottom-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: #A3A2A2;
  font-size: 14px;
  line-height: 1.6;
  font-weight: 400;
}

.course-breadcrumb a,
.course-bottom-breadcrumb a {
  color: #A3A2A2;
}

.course-breadcrumb a:hover,
.course-bottom-breadcrumb a:hover {
  color: #c70000;
}

.course-search-area {
  margin-top: 15px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0;
}

.course-page-search {
  width: 698px;
  height: 46px;
  padding: 2px;
  display: flex;
  justify-content: space-between;
  overflow: hidden;
  border: 0;
  border-radius: 16px;
  background: linear-gradient(to right, #B80D0D, #EA1D1D);
}

.course-page-search input[type="text"] {
  width: 584px;
  height: 100%;
  padding-left: 12px;
  border: 0;
  outline: 0;
  border-radius: 14px;
  color: #000;
  background-color: #fff;
  font-size: 15px;
  font-weight: 400;
}

.course-page-search input[type="text"]::placeholder {
  color: #9fa19f;
  font-size: 14px;
}

.course-page-search button {
  flex: 1;
  height: 100%;
  padding: 0;
  border: 0;
  color: #fff;
  font-size: 18px;
  font-weight: 400;
  background: transparent;
  cursor: pointer;
}

.course-help-btn {
  flex: 1;
  height: 46px;
  margin-left: 15px;
  border-radius: 16px 16px 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 400;
  cursor: pointer;
  background: linear-gradient(to right, #e8273e, #ed6127);
}

.course-help-btn:hover {
  background: linear-gradient(to right, #ed6127, #e8273e);
}

.course-search-bridge {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.6;
}

.course-search-bridge a {
  color: #a71912;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.course-search-bridge a:hover {
  color: #e8273e;
}

.course-filter-card {
  width: 100%;
  margin-top: 12px;
  padding: 12px;
  border: 1px solid #fbe6e5;
  border-radius: 10px;
  background: linear-gradient(to right, #fffaf6, #fdf4ed);
}

.course-filter-row {
  display: flex;
  align-items: flex-start;
  flex-wrap: nowrap;
  min-height: 30px;
}

.course-filter-row + .course-filter-row {
  margin-top: 6px;
}

.course-filter-title {
  width: 71px;
  height: 30px;
  margin-top: 6px;
  padding: 0;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  background: linear-gradient(to right, #ffe3df, #fef4ec);
  color: #111;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
}

.course-filter-options {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  flex: 1;
  column-gap: 6px;
  row-gap: 0;
  margin-left: 10px;
  color: #000;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
}

.course-filter-options a,
.course-filter-options span {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
  color: #3c3a4a;
  white-space: nowrap;
}

.course-filter-options span.disabled {
  color: #aaa;
  cursor: default;
}

.course-filter-options a:hover,
.course-filter-options a.active {
  color: #ff1b1b;
  text-decoration: underline;
  text-decoration-color: #ff1b1b;
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

.course-filter-options a.active {
  font-weight: 600;
}

.course-filter-options a.active::after {
  content: none;
}

@media (min-width: 901px) {
  .course-filter-row {
    flex-wrap: nowrap;
    gap: 0;
  }

  .course-filter-options {
    display: flex;
    margin-left: 10px;
  }

  .course-filter-options a,
  .course-filter-options span {
    font-size: 15px;
    font-weight: 400;
    line-height: 1.5;
  }

  .course-filter-options a.active {
    font-weight: 600;
  }

}

.course-filter-options em {
  display: none;
  font-style: normal;
  color: #aaa;
  font-size: 12px;
  font-weight: 400;
}

.course-filter-options .active em,
.course-filter-options a:hover em {
  color: #d40000;
}

.course-hot {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: #222;
  font-size: 14px;
  line-height: 1.6;
}

.course-hot span {
  font-weight: 500;
}

.course-hot a:hover {
  color: #c70000;
}

.course-results {
  margin-top: 34px;
}

.course-section-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  border-bottom: 1px solid #e0e0e0;
  padding-bottom: 10px;
}

.course-section-head h1 {
  position: relative;
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.35;
}

.course-section-head h1::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -11px;
  width: 88px;
  height: 4px;
  background: #d60000;
}

.course-section-head p {
  margin: 0;
  color: #777;
  font-size: 14px;
}

.course-result-lead-wrap {
  margin: 12px 0 0;
}

.course-result-lead {
  margin: 0;
  color: #666;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.6;
}

.course-result-toggle {
  display: none;
}

.course-result-toggle-check {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.course-result-toggle-close {
  display: none;
}

.course-card-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  min-width: 0;
}

.course-card {
  min-height: 142px;
  min-width: 0;
  padding: 22px 14px 18px;
  border: 1px solid #ffded4;
  border-radius: 10px;
  background: #fffbfb;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.course-card:hover {
  transform: translateY(-2px);
  border-color: #ffc5b7;
  box-shadow: 0 12px 26px rgba(170, 70, 30, 0.08);
}

.course-card-main h3 {
  margin: 0;
  min-height: 30px;
  color: #000;
  font-size: 18px;
  line-height: 1.32;
  font-weight: 500;
  overflow-wrap: anywhere;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}

.course-card-main:hover h3 {
  color: rgb(255, 27, 27);
}

.course-card-main p {
  margin: 14px 0 0;
  min-height: 26px;
  color: #888;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.45;
  display: block;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.course-card-meta {
  margin-top: 16px;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.course-teacher {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.course-teacher img {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  border-radius: 6px;
  object-fit: cover;
}

.course-teacher span {
  min-width: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.course-teacher strong {
  flex: 0 0 auto;
  font-size: 15px;
  font-weight: 400;
  transition: color 0.2s ease;
}

.course-teacher:hover strong {
  color: rgb(255, 27, 27);
}

.course-teacher em {
  min-width: 0;
  overflow: hidden;
  color: #888;
  font-size: 14px;
  font-weight: normal;
  font-style: normal;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-consult-btn {
  width: 68px;
  height: 28px;
  border-radius: 8px;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 13px;
  font-weight: 400;
  background: #e00000;
}

.course-card-tags {
  display: none;
}

.course-card-tags span,
.course-card-tags a {
  max-width: 100%;
  padding: 4px 8px;
  border-radius: 6px;
  overflow: hidden;
  color: #3c2a24;
  background: #fff0ea;
  font-size: 12px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.course-card-tags a:hover {
  color: #d40000;
}

.course-empty {
  margin-top: 18px;
  padding: 28px;
  border: 1px solid #ffded4;
  border-radius: 8px;
  color: #666;
  background: #fffbfb;
  text-align: center;
}

.course-pages {
  margin-top: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.course-pages a,
.course-pages button.course-page-nav,
.course-pages span {
  min-width: 40.41px;
  padding: 8px 15px;
  border: 1px solid #797979;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #333;
  background: #fff;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.4;
  text-align: center;
  box-sizing: border-box;
}

.course-pages button.course-page-nav {
  cursor: pointer;
}

.course-pages a:hover,
.course-pages button.course-page-nav:hover {
  color: #d60000;
  border-color: #d60000;
}

.course-pages .active {
  color: #d60000;
  border-color: #d60000;
  background: #fff;
}

.course-pages .disabled {
  color: #999;
  background: #fff;
}

.course-pages .plain {
  min-width: 18px;
  border: 0;
  background: transparent;
  color: #333;
  padding: 0 2px;
}

.course-pages-mobile {
  display: none;
}

.course-page-jump {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-left: 0;
  padding: 8px;
  border: 1px solid #797979;
  border-radius: 10px;
  box-sizing: border-box;
}

.course-page-jump:hover,
.course-page-jump:focus-within {
  border-color: #d60000;
}

.course-page-jump input {
  width: 34px;
  min-width: 0;
  flex: 0 0 34px;
  padding: 0;
  border: 0;
  border-radius: 0;
  outline: 0;
  background: transparent;
  font-family: inherit;
  font-size: inherit;
  line-height: 1.4;
  text-align: center;
  box-sizing: border-box;
}

.course-page-jump button {
  height: auto;
  min-width: auto;
  padding: 0 0 0 8px;
  border: 0;
  border-left: 1px solid #797979;
  border-radius: 0;
  background: transparent;
  color: #333;
  font-family: inherit;
  font-size: inherit;
  line-height: 1.4;
  cursor: pointer;
}

.course-page-jump:hover button {
  color: #d60000;
}

.course-related {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid #f0b3a7;
}

.course-related h2 {
  margin: 0 0 18px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.course-related p {
  margin: 0 0 16px;
  color: #333;
  font-size: 14px;
  line-height: 1.8;
}

.course-related-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.course-related-tags a {
  padding: 6px 12px;
  border-radius: 6px;
  background: #fff1ec;
  color: #111;
  font-size: 14px;
  line-height: 1.2;
}

.course-related-tags a:hover {
  color: #d40000;
}

.course-topic-bridge {
  margin-top: 16px;
}

.course-topic-bridge a {
  color: #d40000;
  font-weight: 600;
}

.course-topic-bridge a:hover {
  text-decoration: underline;
}

.course-next-step-bridge {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid #f0b3a7;
}

.course-next-step-group + .course-next-step-group {
  margin-top: 18px;
}

.course-next-step-label {
  margin: 0 0 10px;
  color: #8a1f12;
  font-size: 14px;
  font-weight: 700;
}

.course-category-demand-bridge {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid #f0b3a7;
}

.course-category-demand-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.course-category-demand-card {
  min-height: 108px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  border: 1px solid #f3d2ca;
  border-radius: 8px;
  background: #fffdfc;
  color: inherit;
}

.course-category-demand-card:hover {
  border-color: #d40000;
  background: #fff8f5;
}

.course-category-demand-card strong {
  color: #111;
  font-size: 16px;
  line-height: 1.35;
}

.course-category-demand-card span {
  color: #666;
  font-size: 14px;
  line-height: 1.55;
}

.course-learning-path-bridge {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid #f0b3a7;
}

.course-learning-path-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.course-learning-path-card {
  position: relative;
  min-height: 116px;
  padding: 17px 16px 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 9px;
  border: 1px solid #f3d2ca;
  border-radius: 8px;
  background: #fffdfc;
  color: inherit;
}

.course-learning-path-card::before {
  content: "";
  position: absolute;
  top: 17px;
  left: 16px;
  width: 26px;
  height: 3px;
  border-radius: 3px;
  background: #d40000;
}

.course-learning-path-card strong {
  padding-top: 12px;
  color: #111;
  font-size: 16px;
  line-height: 1.35;
}

.course-learning-path-card span {
  color: #666;
  font-size: 14px;
  line-height: 1.55;
}

.course-learning-path-card:hover {
  border-color: #d40000;
  background: #fff8f5;
}

.course-learning-path-card:hover strong {
  color: #d40000;
}

.course-tool-bridge {
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid #f0b3a7;
}

.course-tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.course-tool-card {
  min-height: 122px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  border: 1px solid #f3d2ca;
  border-radius: 8px;
  background: #fffdfc;
  color: inherit;
}

.course-tool-card span {
  width: fit-content;
  max-width: 100%;
  padding: 3px 8px;
  border-radius: 6px;
  background: #fff1ed;
  color: #c70000;
  font-size: 12px;
  line-height: 1.4;
}

.course-tool-card strong {
  color: #111;
  font-size: 16px;
  line-height: 1.35;
}

.course-tool-card em {
  color: #666;
  font-size: 14px;
  font-style: normal;
  line-height: 1.55;
}

.course-tool-card:hover {
  border-color: #d40000;
  background: #fff8f5;
}

.course-tool-card:hover strong {
  color: #d40000;
}

.course-landing-needs {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid #f0b3a7;
}

.course-section-head.compact {
  display: block;
  margin-bottom: 16px;
}

.course-section-head.compact h2 {
  margin: 0;
  color: #111;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.course-section-head.compact p {
  margin: 8px 0 0;
  color: #333;
  font-size: 14px;
  line-height: 1.8;
}

.course-landing-need-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.course-landing-need-groups {
  display: grid;
  gap: 12px;
}

.course-landing-need-group {
  border: 1px solid #f3d2ca;
  border-radius: 8px;
  background: #fffdfc;
}

.course-landing-need-group summary {
  min-height: 48px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  color: #111;
  font-size: 16px;
  font-weight: 600;
  list-style: none;
}

.course-landing-need-group summary::-webkit-details-marker {
  display: none;
}

.course-landing-need-group summary::after {
  content: "+";
  color: #d40000;
  font-size: 18px;
  line-height: 1;
}

.course-landing-need-group[open] summary::after {
  content: "-";
}

.course-landing-need-group summary em {
  margin-left: auto;
  color: #888;
  font-size: 13px;
  font-style: normal;
  font-weight: 400;
}

.course-landing-need-group .course-landing-need-grid {
  padding: 0 14px 14px;
}

.course-landing-need-card {
  min-height: 104px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  border: 1px solid #f3d2ca;
  border-radius: 8px;
  background: #fff8f5;
}

.course-landing-need-card:hover {
  border-color: #d40000;
}

.course-landing-need-card strong {
  color: #111;
  font-size: 16px;
  line-height: 1.35;
}

.course-landing-need-card span {
  color: #666;
  font-size: 14px;
  line-height: 1.55;
}

.course-copy {
  margin-top: 58px;
  border-top: 1px solid #f0b3a7;
  padding-top: 22px;
}

.course-copy h2 {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
}

.course-copy h2:not(:first-child) {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid #f0b3a7;
}

.course-copy p,
.course-copy li {
  color: #222;
  font-size: 14px;
  line-height: 1.85;
}

.course-copy ul {
  margin: 0;
  padding-left: 18px;
}

.course-faq {
  margin-top: 58px;
  border-top: 1px solid #f0b3a7;
  padding-top: 22px;
}

.course-faq h2 {
  margin: 0 0 18px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
}

.course-faq-list {
  display: grid;
  gap: 14px;
}

.course-faq-item {
  padding: 14px 16px;
  border: 1px solid #ffded4;
  border-radius: 8px;
  background: #fffbfb;
}

.course-faq-question {
  color: #111;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
}

.course-faq-item p {
  margin: 8px 0 0;
  color: #333;
  font-size: 14px;
  line-height: 1.8;
}

.course-bottom-breadcrumb {
  display: none;
  margin-top: 36px;
  padding: 12px 0 24px;
  border-top: 1px solid #eee;
}

.course-sidebar {
  width: 265px;
  flex-shrink: 0;
  position: sticky;
  top: 113px;
  height: fit-content;
  margin-top: 37px;
}

.course-wechat-card {
  width: 265px;
  overflow: visible;
  border-radius: 16px;
  background: transparent;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
  border: 0;
  position: relative;
  color: #131313;
  font-size: 14px;
  line-height: 22.4px;
}

.course-wechat-top {
  position: relative;
  height: 153px;
  padding: 21px 21px 0;
  box-sizing: border-box;
  overflow: hidden;
  border-radius: 16px 16px 0 0;
  color: #fff;
  background: #C62828;
}

.course-wechat-top img {
  position: absolute;
  top: 0;
  left: 0;
  width: 265px;
  height: 153px;
  display: block;
}

.course-wechat-title,
.course-wechat-top p {
  position: relative;
  z-index: 1;
  margin: 0;
}

.course-wechat-title {
  margin-bottom: 8px;
  color: #fff;
  font-family: Arial, sans-serif;
  font-size: 20px;
  font-weight: 400;
  line-height: 32px;
}

.course-wechat-top p {
  color: #fff;
  font-family: "PingFang SC", "PingFangSC-Regular", sans-serif;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.4;
}

.course-wechat-qr {
  width: 190px;
  height: 189px;
  margin: -60px auto 0;
  position: relative;
  z-index: 2;
}

.course-wechat-qr img {
  width: 190px;
  height: 189px;
  object-fit: cover;
  border-radius: 10px;
  display: block;
}

.course-wechat-card-bottom {
  padding: 15px 21px 20px;
  box-sizing: border-box;
  border-radius: 0 0 16px 16px;
  background: #fff;
  text-align: center;
  color: #131313;
  font-size: 14px;
  line-height: 22.4px;
}

.course-wechat-note {
  margin: 0;
  text-align: center;
  color: #131313;
  font-family: "PingFang SC", "PingFangSC-Regular", sans-serif;
  font-size: 14px;
  font-weight: 400;
  line-height: 22.4px;
  white-space: nowrap;
}

.course-footer {
  margin-top: 54px;
  padding: 44px 0 28px;
  background: #050505;
}

.course-footer-inner {
  max-width: 1443px;
  margin: 0 auto;
  padding: 0 121px;
  color: #cfcfcf;
  font-size: 13px;
  line-height: 1.9;
}

.course-footer p {
  margin: 0;
}

.course-footer-intro {
  color: #d8d8d8;
}

.course-footer-line {
  height: 1px;
  margin: 22px 0;
  background: #333;
}

.course-footer-block {
  margin-top: 20px;
}

.course-footer-title {
  margin: 0 0 10px;
  color: #e4e4e4;
  font-size: 14px;
  font-weight: 600;
}

.course-footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
}

.course-footer-tags a {
  color: #cfcfcf;
}

.course-footer-tags a:hover {
  color: #fff;
}

.course-footer-copy {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid #222;
  color: #9a9a9a;
  text-align: center;
}

.course-mobile-fixed {
  display: none;
}

.course-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: none;
  align-items: center;
  justify-content: center;
}

.course-modal:target {
  display: flex;
}

.course-modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.course-modal-panel {
  position: relative;
  z-index: 2;
  width: 265px;
  padding: 0;
  border-radius: 16px;
  background: transparent;
}

.course-modal-close {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 4;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: #c62828;
  font-size: 22px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.course-modal-wechat-card {
  margin: 0;
  overflow: hidden;
  background: #fff;
}

@media (max-width: 900px) {
  .course-header {
    position: static;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  }

  .course-header-inner {
    width: 100%;
    padding: 0 10px;
  }

  .course-mobile-search {
    display: block;
    padding-top: 10px;
  }

  .course-top-search {
    width: 100%;
    height: 35px;
    border-radius: 10px;
  }

  .course-top-search input {
    padding: 0 8px;
    font-size: 13px;
  }

  .course-top-search button {
    width: 88px;
    font-size: 14px;
  }

  .course-search-logo {
    width: 25px;
    height: 25px;
    margin-left: 6px;
    border-radius: 50%;
  }

  .course-nav-row {
    height: 51px;
    gap: 0;
    justify-content: space-between;
  }

  .course-logo,
  .course-desktop-search {
    display: none;
  }

  .course-nav {
    width: 100%;
    justify-content: space-between;
    gap: 0;
    font-size: 15px;
  }

  .course-page {
    padding-top: 16px;
  }

  .course-main {
    width: 100%;
    max-width: 100%;
    display: block;
    padding: 0 10px;
  }

  .course-content {
    width: 100%;
    max-width: 100%;
  }

  .course-sidebar {
    display: none;
  }

  .course-breadcrumb {
    display: none;
    font-size: 12px;
    gap: 5px;
  }

  .course-search-area {
    display: none;
  }

  .course-filter-card {
    margin-top: 0;
    padding: 12px;
  }

  .course-filter-row {
    max-width: 100%;
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .course-filter-row + .course-filter-row {
    margin-top: 6px;
  }

  .course-filter-row::-webkit-scrollbar {
    display: none;
  }

  .course-filter-title {
    width: 71px;
    height: 28px;
    margin-top: 0;
    margin-bottom: 0;
    padding: 0;
    font-size: 14px;
  }

  .course-filter-options {
    flex: 0 0 auto;
    flex-wrap: nowrap;
    overflow: visible;
    gap: 10px;
    margin-left: 10px;
    padding-bottom: 0;
    font-size: 14px;
  }

  .course-filter-options::-webkit-scrollbar {
    display: none;
  }

  .course-filter-options a,
  .course-filter-options span {
    flex: 0 0 auto;
  }

  .course-hot {
    display: none;
  }

  .course-hot::-webkit-scrollbar {
    display: none;
  }

  .course-hot a,
  .course-hot span {
    flex: 0 0 auto;
  }

  .course-section-head {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: nowrap;
  }

  .course-section-head h1 {
    font-size: 16px;
  }

  .course-section-head h1::after {
    bottom: -8px;
    height: 3px;
  }

  .course-section-head p {
    margin-top: 0;
    font-size: 14px;
    font-weight: 400;
  }

  .course-result-lead {
    font-size: 14px;
  }

  .course-result-lead-wrap {
    position: relative;
  }

  .course-result-lead {
    display: -webkit-box;
    overflow: hidden;
    padding-right: 52px;
    line-height: 1.8;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .course-result-lead-wrap.is-expanded .course-result-lead {
    display: block;
    overflow: visible;
    -webkit-line-clamp: initial;
  }

  .course-result-toggle-check:checked ~ .course-result-lead {
    display: block;
    overflow: visible;
    -webkit-line-clamp: initial;
  }

  .course-result-toggle {
    position: absolute;
    right: 0;
    bottom: 0;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    height: 25px;
    padding: 0 0 0 18px;
    border: 0;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0), #fff 18px);
    color: #ad0800;
    font: inherit;
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    pointer-events: auto;
  }

  .course-result-toggle::after {
    content: "";
    width: 6px;
    height: 6px;
    margin-top: -3px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
  }

  .course-result-lead-wrap.is-expanded .course-result-toggle::after {
    margin-top: 3px;
    transform: rotate(225deg);
  }

  .course-result-toggle-check:checked ~ .course-result-toggle::after {
    margin-top: 3px;
    transform: rotate(225deg);
  }

  .course-result-toggle-check:checked ~ .course-result-toggle .course-result-toggle-open {
    display: none;
  }

  .course-result-toggle-check:checked ~ .course-result-toggle .course-result-toggle-close {
    display: inline;
  }

  .course-card-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .course-card {
    min-height: 0;
    padding: 12px 12px 11px;
  }

  .course-card-main h3 {
    min-height: 0;
    font-size: 15px;
    line-height: 1.25;
  }

  .course-card-main p {
    margin-top: 8px;
    min-height: 0;
    font-size: 13px;
    line-height: 1.35;
    display: block;
    white-space: nowrap;
    text-overflow: ellipsis;
  }

  .course-card-meta {
    margin-top: 10px;
    gap: 10px;
  }

  .course-consult-btn {
    display: none;
  }

  .course-teacher {
    gap: 7px;
  }

  .course-teacher img {
    width: 24px;
    height: 24px;
  }

  .course-teacher span {
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .course-teacher strong {
    flex: 0 0 auto;
    font-size: 14px;
    font-weight: 400;
  }

  .course-teacher em {
    display: block;
    min-width: 0;
    max-width: 220px;
    margin-top: 0;
    font-size: 12px;
    font-weight: normal;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .course-pages {
    display: none;
  }

  .course-pages-mobile {
    margin-top: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: #131313;
    font-size: 14px;
    line-height: 1.6;
  }

  .course-pages-mobile a,
  .course-pages-mobile button.course-page-nav,
  .course-pages-mobile span.disabled {
    padding: 8px 15px;
    border-radius: 10px;
    border: 1px solid #797979;
    box-sizing: border-box;
    min-width: 40.41px;
    color: #131313;
    text-align: center;
    background: #fff;
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
  }

  .course-pages-mobile button.course-page-nav {
    cursor: pointer;
  }

  .course-pages-mobile a:hover,
  .course-pages-mobile button.course-page-nav:hover {
    color: #ad0800;
    border-color: #ad0800;
  }

  .course-pages-mobile span.disabled {
    color: #999;
    border-color: #d8d8d8;
  }

  .course-pages-mobile .course-page-current {
    margin: 0 12px;
    white-space: nowrap;
  }

  .course-related {
    margin-top: 36px;
    padding-top: 18px;
  }

  .course-related h2 {
    font-size: 18px;
  }

  .course-next-step-bridge {
    margin-top: 36px;
    padding-top: 18px;
  }

  .course-next-step-group + .course-next-step-group {
    margin-top: 16px;
  }

  .course-category-demand-bridge {
    margin-top: 36px;
    padding-top: 18px;
  }

  .course-category-demand-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .course-category-demand-card {
    min-height: 0;
    padding: 13px;
  }

  .course-learning-path-bridge {
    margin-top: 36px;
    padding-top: 18px;
  }

  .course-learning-path-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .course-learning-path-card {
    min-height: 0;
    padding: 15px 13px 13px;
  }

  .course-learning-path-card::before {
    top: 15px;
    left: 13px;
  }

  .course-tool-bridge {
    margin-top: 36px;
    padding-top: 18px;
  }

  .course-tool-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .course-tool-card {
    min-height: 0;
    padding: 13px;
  }

  .course-landing-needs {
    margin-top: 36px;
    padding-top: 18px;
  }

  .course-landing-need-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .course-landing-need-card {
    min-height: 0;
    padding: 13px;
  }

  .course-copy {
    margin-top: 34px;
    padding-top: 18px;
  }

  .course-copy h2 {
    font-size: 18px;
  }

  .course-copy p,
  .course-copy li {
    font-size: 14px;
    line-height: 1.85;
  }

  .course-bottom-breadcrumb {
    max-width: calc(100% - 20px);
    margin: 28px auto 0;
    padding: 12px 0 16px;
    display: flex;
    font-size: 12px;
    gap: 5px;
  }

  .course-mobile-fixed {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 30;
    display: block;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.08);
  }

  .course-mobile-fixed a {
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: linear-gradient(135deg, #d20000, #f06425);
    font-size: 14px;
    font-weight: normal;
  }

  .course-footer {
    padding: 28px 10px 86px;
  }

  .course-footer-tags {
    gap: 8px 14px;
  }
}

@media (min-width: 901px) and (max-width: 1320px) {
  .header-nav-bar,
  .course-main,
  .course-footer > div {
    padding-left: 40px;
    padding-right: 40px;
  }

  .course-main {
    flex-direction: column;
    gap: 24px;
  }

  .course-content {
    width: 100%;
  }

  .course-sidebar {
    width: 100%;
    position: static;
    margin-top: 0;
    transform: none;
  }

  .course-wechat-card {
    margin: 0 auto;
  }
}

@media (max-width: 900px) {
  .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    width: 100%;
    height: auto;
    margin: 0;
    padding: 0;
    background: #fff;
    box-shadow: none;
    filter: none;
  }

  .header-wrapper {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
  }

  .header-top-bar {
    width: 100%;
    padding: 8px 10px;
    display: flex;
    align-items: center;
    background: #fff;
  }

  .search-container {
    width: 100%;
    flex: 1;
    display: flex;
  }

  .search-box {
    width: 100%;
    height: 44px;
    padding: 2px;
    border-radius: 13px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #b80d0d 0%, #ea1d1d 85%, #ed6525 100%);
  }

  .search-inner {
    height: 100%;
    flex: 1;
    min-width: 0;
    padding: 0 8px;
    border-radius: 11px;
    display: flex;
    align-items: center;
    gap: 6px;
    overflow: hidden;
    background: #fff;
  }

  .mobile-logo {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: block;
    flex-shrink: 0;
    object-fit: cover;
  }

  .search-input {
    width: auto;
    height: 100%;
    min-width: 0;
    flex: 1;
    padding: 0;
    border: 0;
    outline: 0;
    color: #000;
    background: transparent;
    font-size: 16px;
  }

  .search-input::placeholder {
    color: #c2bfbf;
    font-size: 16px;
  }

  .search-btn {
    flex: 0 0 68px;
    height: 100%;
    padding: 0;
    border: 0;
    color: #fff;
    background: transparent;
    font-size: 13px;
    font-weight: 400;
    text-align: center;
    white-space: nowrap;
  }

  .header-nav-bar {
    max-width: 100%;
    width: 100%;
    margin: 0;
    padding: 0 13px;
    gap: 0;
    justify-content: flex-start;
    box-sizing: border-box;
  }

  .logo {
    display: none;
  }

  .nav-menu {
    display: flex;
    flex-direction: row;
    position: static;
    box-shadow: none;
    padding: 0;
    gap: 0;
    margin-left: 0;
    flex-shrink: 0;
    width: 100%;
    justify-content: space-between;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    height: 44px;
    padding: 10px 0;
    font-size: 15px;
    font-weight: 400;
    color: #000000;
    font-family: 'PingFang SC', 'PingFangSC-Regular', 'Microsoft YaHei', sans-serif;
    white-space: nowrap;
    line-height: 1;
  }

  .nav-link.solution-link {
    display: none;
  }

  .course-page {
    padding-top: 104px;
  }

  .course-results {
    margin-top: 20px;
  }

  .course-section-head p {
    font-size: 14px;
    font-weight: 400;
    margin-top: 0;
  }

  .course-section-head {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: nowrap;
  }
}