:root {
  --navy: #0a2540;
  --blue: #2457d6;
  --primary: #2563EB;
  --ink: #2b3442;
  --muted: #7a8595;
  --paper: #f8f9fa;
  --white: #ffffff;
  --line: rgba(10, 37, 64, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(36, 87, 214, 0.07), transparent 28%),
    var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.8;
}

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

.plain-top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px clamp(20px, 5vw, 72px);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  font-size: 15px;
}

.plain-top a:first-child {
  color: var(--navy);
  font-weight: 900;
}

.plain-top a:last-child {
  color: #9aa4b2;
  font-weight: 800;
  transition: color 160ms ease;
}

.plain-top a:last-child:hover {
  color: var(--navy);
}

.plain-article {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(46px, 7vw, 82px) 0 100px;
}

.article-hero {
  max-width: 860px;
  margin: 0 auto 34px;
  text-align: center;
}

#articleMeta {
  width: fit-content;
  margin: 0 auto 20px;
  padding: 8px 16px;
  color: var(--blue);
  background: rgba(36, 87, 214, 0.08);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 900;
}

#articleTitle {
  margin: 0 auto 18px;
  color: #222b38;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: 0;
}

#articleSummary {
  max-width: 700px;
  margin: 0 auto 14px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.75;
}

#articleDate {
  display: inline-block;
  color: #a0a9b8;
  font-size: 14px;
  font-weight: 700;
}

.article-card {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(34px, 5vw, 58px);
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

#articleContent p {
  margin: 0 0 1.5em;
  color: #333b48;
  font-size: 17px;
  line-height: 1.9;
}

#articleContent p:first-child {
  color: var(--navy);
  font-size: 21px;
  font-weight: 900;
}

.highlight-block {
  padding: 18px 20px 18px 24px;
  color: #2b3442 !important;
  background: #f5f7fa;
  border-left: 5px solid var(--primary);
  border-radius: 12px;
  font-weight: 700;
}

#articleContent p:last-child {
  margin-bottom: 0;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.article-footer p {
  margin: 0;
  color: #9aa4b2;
  font-size: 14px;
}

.share-links {
  display: flex;
  gap: 10px;
}

.share-links a {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #a0a9b8;
  background: #f2f4f7;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
  transition: color 160ms ease, background 160ms ease;
}

.share-links a:hover {
  color: var(--white);
  background: var(--blue);
}

@media (max-width: 720px) {
  .plain-top {
    position: static;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .plain-article {
    width: min(100% - 28px, 960px);
    padding-top: 36px;
    padding-bottom: 70px;
  }

  #articleTitle {
    font-size: 34px;
  }

  #articleSummary {
    font-size: 16px;
  }

  .article-card {
    padding: 24px;
    border-radius: 14px;
  }

  #articleContent p {
    font-size: 16px;
  }

  .article-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

.news-list-wrap {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(46px, 7vw, 82px) 0 100px;
}

.news-list-hero {
  max-width: 760px;
  margin-bottom: 28px;
}

.news-list-hero p {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.news-list-hero h1 {
  margin: 0 0 14px;
  color: var(--navy);
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1.1;
}

.news-list-hero span {
  display: block;
  color: var(--muted);
  font-size: 17px;
}

.news-category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 26px;
}

.news-category-tabs a {
  padding: 9px 16px;
  color: var(--muted);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  box-shadow: 0 8px 22px rgba(10, 37, 64, 0.05);
}

.news-category-tabs a.active,
.news-category-tabs a:hover {
  color: var(--white);
  background: var(--primary);
  border-color: var(--primary);
}

.news-list-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.news-list-card {
  position: relative;
  overflow: hidden;
  min-height: 260px;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 14px 36px rgba(10, 37, 64, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.news-list-card img {
  width: calc(100% + 48px);
  height: 150px;
  margin: -24px -24px 20px;
  object-fit: cover;
  filter: saturate(0.92);
}

.news-list-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.28);
  box-shadow: 0 22px 52px rgba(10, 37, 64, 0.13);
}

.news-list-card > span {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  margin-bottom: 18px;
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
}

.news-list-card small {
  display: block;
  margin-bottom: 10px;
  color: #96a1b2;
  font-size: 13px;
  font-weight: 800;
}

.news-list-card h2 {
  margin: 0 0 12px;
  color: #172033;
  font-size: 20px;
  line-height: 1.42;
}

.news-list-card p {
  margin: 0;
  color: #657084;
  font-size: 15px;
  line-height: 1.75;
}

.news-pagination {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.news-pagination a {
  min-width: 42px;
  padding: 8px 13px;
  color: var(--muted);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  text-align: center;
  font-weight: 800;
}

.news-pagination a.active,
.news-pagination a:hover {
  color: var(--white);
  background: var(--navy);
}

.news-empty {
  padding: 38px;
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 14px 36px rgba(10, 37, 64, 0.08);
}

.news-empty h2 {
  margin: 0 0 8px;
  color: var(--navy);
}

.news-empty p {
  margin: 0;
  color: var(--muted);
}

.news-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(0, 1.35fr);
  gap: 24px;
  align-items: stretch;
}

.news-hot-column,
.news-list-column {
  min-width: 0;
}

.news-hot-column h2,
.news-list-column-head h2 {
  margin: 0;
  color: var(--navy);
  font-size: 22px;
  line-height: 1.3;
}

.news-hot-card {
  display: block;
  overflow: hidden;
  min-height: 100%;
  margin-top: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 14px 36px rgba(10, 37, 64, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.news-hot-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.28);
  box-shadow: 0 22px 52px rgba(10, 37, 64, 0.13);
}

.news-hot-card img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  filter: saturate(0.94);
}

.news-hot-card small,
.news-hot-card h3,
.news-hot-card p {
  display: block;
  margin-right: 24px;
  margin-left: 24px;
}

.news-hot-card small {
  margin-top: 20px;
  margin-bottom: 10px;
  color: #96a1b2;
  font-size: 13px;
  font-weight: 800;
}

.news-hot-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  color: #172033;
  font-size: 24px;
  line-height: 1.4;
}

.news-hot-card p {
  margin-top: 0;
  margin-bottom: 24px;
  color: #657084;
  font-size: 15px;
  line-height: 1.75;
}

.news-list-column {
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 14px 36px rgba(10, 37, 64, 0.08);
}

.news-list-column-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.news-list-column-head span {
  color: #96a1b2;
  font-size: 13px;
  font-weight: 800;
}

.news-compact-list {
  display: grid;
}

.news-compact-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 96px;
  gap: 14px;
  align-items: center;
  min-height: 68px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
  transition: background 160ms ease, padding 160ms ease;
}

.news-compact-row:hover {
  padding-right: 12px;
  padding-left: 12px;
  background: #f5f7fa;
  border-radius: 12px;
}

.news-compact-row span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
}

.news-compact-row strong {
  overflow: hidden;
  color: #172033;
  font-size: 16px;
  line-height: 1.55;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.news-compact-row time {
  color: #96a1b2;
  font-size: 13px;
  font-weight: 800;
  text-align: right;
}

@media (max-width: 920px) {
  .news-layout {
    grid-template-columns: 1fr;
  }

  .news-list-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .news-list-wrap {
    width: min(100% - 28px, 1160px);
    padding-top: 36px;
    padding-bottom: 70px;
  }

  .news-list-grid {
    grid-template-columns: 1fr;
  }

  .news-list-column {
    padding: 18px;
  }

  .news-compact-row {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 10px;
  }

  .news-compact-row time {
    grid-column: 2;
    text-align: left;
  }

  .news-compact-row strong {
    white-space: normal;
  }
}

.detail-top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px clamp(20px, 5vw, 72px);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
  font-size: 15px;
}

.detail-top a:first-child {
  color: var(--navy);
  font-weight: 900;
}

.detail-top a:last-child {
  color: #7a8595;
  font-weight: 800;
  transition: color 160ms ease;
}

.detail-top a:last-child:hover {
  color: var(--primary);
}

.footer {
  padding: 28px 20px;
  color: #8b96a6;
  text-align: center;
  background: #ffffff;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.detail-hero {
  width: min(960px, calc(100% - 40px));
  margin: 36px auto 24px;
  padding: clamp(34px, 5vw, 56px);
  text-align: center;
  background:
    radial-gradient(circle at 16% 12%, rgba(37, 99, 235, 0.08), transparent 28%),
    #ffffff;
  border: 1px solid rgba(10, 37, 64, 0.06);
  border-radius: 24px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.06);
}

.detail-hero .eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  margin: 0 0 16px;
  padding: 7px 16px;
  color: var(--primary);
  background: #eff6ff;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
}

.detail-hero h1 {
  margin: 0 0 14px;
  color: #1f2937;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: 0;
}

.detail-hero p:last-child {
  max-width: 760px;
  margin: 0 auto;
  color: #5f6b7a;
  font-size: 17px;
  line-height: 1.85;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto 76px;
  align-items: start;
}

.detail-main {
  display: grid;
  gap: 24px;
}

.detail-main section,
.detail-side {
  padding: clamp(26px, 4vw, 38px);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(10, 37, 64, 0.06);
  border-radius: 20px;
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.055);
}

.detail-main h2,
.detail-side h2 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  color: #1f2937;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 900;
}

.detail-main h2::before,
.detail-side h2::before {
  content: "";
  display: block;
  width: 5px;
  height: 22px;
  background: var(--primary);
  border-radius: 999px;
}

.detail-main p {
  margin: 0 0 16px;
  color: #3f4a59;
  font-size: 16px;
  line-height: 1.85;
}

.detail-main p:last-child {
  margin-bottom: 0;
}

.service-tags {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-tags li {
  position: relative;
  padding: 14px 16px 14px 42px;
  color: #334155;
  background: #f8fafc;
  border: 1px solid #e7edf5;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.5;
}

.service-tags li::before {
  content: "✓";
  position: absolute;
  top: 13px;
  left: 16px;
  color: #059669;
  font-weight: 900;
}

.cta-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 4px;
  padding: 0 28px;
  color: #ffffff;
  background: var(--primary);
  border-radius: 999px;
  box-shadow: 0 12px 26px rgba(37, 99, 235, 0.22);
  font-size: 16px;
  font-weight: 900;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.cta-link:hover {
  background: #1d4ed8;
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.28);
  transform: translateY(-2px);
}

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

.meta-list div {
  padding: 16px;
  color: #475569;
  background: #f8fafc;
  border: 1px solid #e7edf5;
  border-radius: 14px;
  font-size: 15px;
  line-height: 1.65;
}

.meta-list strong {
  color: #1f2937;
  font-size: 14px;
}

.course-detail-page {
  color: #333333;
  background: #f8f9fa;
  font-size: 16px;
  line-height: 1.8;
}

.course-page-card {
  width: min(1080px, calc(100% - 40px));
  margin: 30px auto 72px;
  padding: clamp(26px, 4vw, 48px);
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.06);
}

.course-detail-hero {
  margin: 0 0 44px;
  padding: 0 0 36px;
  border-bottom: 1px solid #eef2f7;
}

.course-hero-title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 14px;
}

.course-hero-title h1 {
  margin: 0;
  color: #333333;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: 0;
}

.course-chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 14px;
  color: var(--primary);
  background: #eff6ff;
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

.course-detail-hero p {
  max-width: 820px;
  margin: 0;
  color: #5f6b7a;
  font-size: 16px;
  line-height: 1.8;
}

.course-detail-main {
  display: grid;
  gap: 44px;
}

.course-module,
.course-bottom-card {
  padding: 0;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}

.course-module h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  color: #333333;
  font-size: 22px;
  line-height: 1.35;
  font-weight: 900;
}

.course-module h2::before {
  content: "";
  display: block;
  width: 4px;
  height: 20px;
  background: var(--primary);
  border-radius: 999px;
}

.pain-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.pain-item {
  display: grid;
  align-content: start;
  gap: 12px;
  min-height: 148px;
  padding: 22px 20px;
  color: #334155;
  background: linear-gradient(180deg, #f8fbff 0%, #f3f7fc 100%);
  border: 1px solid #eaf0f7;
  border-radius: 18px;
  font-size: 16px;
  line-height: 1.6;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.pain-item:hover {
  border-color: rgba(37, 99, 235, 0.22);
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.07);
  transform: translateY(-3px);
}

.pain-icon {
  display: grid;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  place-items: center;
  background: #eff6ff;
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.1);
  font-size: 20px;
  line-height: 1;
}

.course-steps {
  display: grid;
  gap: 18px;
}

.course-step-card {
  position: relative;
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 22px;
  min-height: auto;
  padding: 24px 26px;
  overflow: hidden;
  background: #f8fafc;
  border: 1px solid #e8edf3;
  border-radius: 18px;
}

.course-step-card::before {
  content: "";
  position: absolute;
  left: 66px;
  top: 74px;
  bottom: -24px;
  width: 1px;
  height: auto;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.22), rgba(37, 99, 235, 0));
  border-radius: 999px;
}

.course-step-card:last-child::before {
  display: none;
}

.step-index {
  position: relative;
  z-index: 1;
  display: grid;
  width: 64px;
  height: 64px;
  place-items: center;
  margin: 0;
  color: #2563eb;
  background: #ffffff;
  border: 1px solid #dbe8ff;
  border-radius: 18px;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.08);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0;
}

.course-step-card h3 {
  position: relative;
  margin: 2px 0 8px;
  color: #333333;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 900;
}

.course-step-card p {
  position: relative;
  margin: 0;
  color: #64748b;
  font-size: 16px;
  line-height: 1.8;
}

.course-effect {
  padding: 24px 26px;
  background: #f8fafc;
  border-left: 5px solid var(--primary);
  border-radius: 18px;
}

.course-effect p {
  margin: 0 0 10px;
  color: #333333;
  font-size: 16px;
  line-height: 1.8;
}

.course-effect p:last-child {
  margin-bottom: 0;
}

.course-effect p::before {
  content: "✓";
  display: inline-grid;
  width: 22px;
  height: 22px;
  margin-right: 8px;
  place-items: center;
  color: #ffffff;
  background: #059669;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
  vertical-align: 1px;
}

.course-bottom-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 22px;
  padding: 28px;
  background: #f8fafc;
  border-radius: 18px;
}

.course-info-box {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  background: transparent;
  border-radius: 0;
}

.course-info-box p {
  margin: 0;
  color: #475569;
  font-size: 16px;
  line-height: 1.8;
}

.course-info-box strong {
  color: #1e293b;
}

.course-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 30px;
  color: #ffffff;
  background: var(--primary);
  border-radius: 999px;
  box-shadow: 0 12px 26px rgba(37, 99, 235, 0.22);
  font-size: 16px;
  font-weight: 900;
  white-space: nowrap;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.course-cta:hover {
  background: #1d4ed8;
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.28);
  transform: translateY(-2px);
}

.course-cta:active {
  transform: scale(0.98);
}

@media (max-width: 860px) {
  .pain-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-info-box {
    grid-template-columns: 1fr;
  }

  .course-bottom-card {
    grid-template-columns: 1fr;
  }

  .course-cta {
    width: 100%;
  }
}

@media (max-width: 720px) {
  .detail-top {
    position: static;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .detail-hero,
  .detail-layout {
    width: min(100% - 28px, 960px);
  }

  .detail-hero {
    margin-top: 24px;
    padding: 28px 22px;
    text-align: left;
  }

  .detail-hero p:last-child {
    font-size: 16px;
  }

  .detail-layout {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 56px;
  }

  .detail-main section,
  .detail-side {
    padding: 24px;
    border-radius: 18px;
  }

  .detail-main h2,
  .detail-side h2 {
    font-size: 21px;
    margin-bottom: 16px;
  }

  .service-tags {
    grid-template-columns: 1fr;
  }

  .course-page-card {
    width: min(100% - 28px, 1080px);
    margin-top: 24px;
    padding: 24px;
  }

  .course-detail-hero {
    margin-bottom: 40px;
    padding-bottom: 30px;
  }

  .course-hero-title {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .course-hero-title h1 {
    font-size: 24px;
  }

  .course-detail-hero p,
  .pain-item,
  .course-effect p {
    font-size: 15px;
  }

  .course-detail-main {
    gap: 42px;
  }

  .pain-list {
    grid-template-columns: 1fr;
  }

  .course-step-card {
    grid-template-columns: 64px 1fr;
    gap: 16px;
    padding: 20px;
  }

  .course-module h2 {
    font-size: 21px;
  }

  .course-bottom-card {
    padding: 22px;
  }
}

.course-catalog-page {
  margin: 0;
  color: #1a1a1a;
  background: #f0f2f5;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

.course-catalog-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px max(24px, calc((100vw - 1100px) / 2));
  background: #ffffff;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
}

.course-catalog-brand {
  color: #1a1a1a;
  font-size: 16px;
  font-weight: 800;
}

.course-catalog-brand strong {
  color: #007bff;
  font-weight: 900;
}

.course-catalog-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.course-catalog-tabs a {
  display: inline-flex;
  min-height: 38px;
  padding: 0 18px;
  align-items: center;
  justify-content: center;
  color: #333333;
  background: #e9ecef;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 800;
  transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.course-catalog-tabs a:hover {
  color: #ffffff;
  background: #007bff;
  transform: translateY(-1px);
}

.course-catalog-shell {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  padding: 54px 0 80px;
}

.course-catalog-hero {
  margin-bottom: 60px;
  padding: 44px 48px;
  background: #ffffff;
  border-radius: 18px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
}

.course-catalog-hero p {
  margin: 0 0 10px;
  color: #007bff;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-catalog-hero h1 {
  margin: 0 0 14px;
  color: #1a1a1a;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1.16;
  font-weight: 900;
}

.course-catalog-hero span {
  display: block;
  max-width: 760px;
  color: #666666;
  font-size: 16px;
  line-height: 1.8;
}

.course-level-block {
  margin-bottom: 60px;
}

.course-level-block:last-child {
  margin-bottom: 0;
}

.course-level-title {
  margin-bottom: 30px;
}

.course-level-title h2 {
  margin: 0 0 10px;
  color: #1a1a1a;
  font-size: 32px;
  line-height: 1.25;
  font-weight: 900;
}

.course-level-title p {
  max-width: 720px;
  margin: 0;
  color: #666666;
  font-size: 16px;
  line-height: 1.8;
}

.course-large-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.42fr) auto;
  gap: 28px;
  align-items: center;
  margin-bottom: 30px;
  padding: 40px;
  color: #333333;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.course-large-card:hover {
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
  transform: scale(1.01);
}

.course-card-head span {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 6px 12px;
  color: #007bff;
  background: #eef6ff;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.course-card-head h3 {
  margin: 0 0 10px;
  color: #1a1a1a;
  font-size: 24px;
  line-height: 1.35;
  font-weight: 900;
}

.course-card-head p,
.course-large-card strong,
.course-large-card li {
  font-size: 15px;
  line-height: 1.8;
}

.course-card-head p {
  margin: 0;
  color: #555555;
}

.course-large-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  color: #555555;
  list-style: none;
}

.course-large-card li {
  position: relative;
  padding-left: 20px;
}

.course-large-card li::before {
  content: "";
  position: absolute;
  top: 0.9em;
  left: 0;
  width: 8px;
  height: 8px;
  background: #007bff;
  border-radius: 2px;
  transform: translateY(-50%);
}

.course-large-card strong {
  color: #1a1a1a;
  font-weight: 800;
}

.course-large-card a {
  display: inline-flex;
  min-height: 44px;
  padding: 0 20px;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background: #007bff;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
  white-space: nowrap;
  transition: background 0.2s ease, transform 0.2s ease;
}

.course-large-card a:hover {
  background: #0069d9;
  transform: translateY(-1px);
}

.mock-program-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  color: #666666;
  font-size: 15px;
  line-height: 1.8;
}

.mock-program-card {
  padding: 28px;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
}

.mock-program-card h3 {
  margin: 0 0 10px;
  color: #1a1a1a;
  font-size: 20px;
  line-height: 1.4;
}

.mock-program-card p {
  margin: 0;
  color: #555555;
  font-size: 15px;
  line-height: 1.8;
}

@media (max-width: 980px) {
  .course-large-card {
    grid-template-columns: 1fr;
    align-items: start;
  }
}

@media (max-width: 768px) {
  .course-catalog-nav {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .course-catalog-shell {
    width: min(100% - 28px, 1100px);
    padding-top: 34px;
  }

  .course-catalog-hero,
  .course-large-card {
    padding: 28px;
  }

  .mock-program-list {
    grid-template-columns: 1fr;
  }

  .course-level-title h2 {
    font-size: 28px;
  }

  .course-card-head h3 {
    font-size: 22px;
  }
}