/* 2027 course materials: retain the site's daylight palette and original artwork. */
.course-2027-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px 22px; margin-top: 24px; }
.course-2027-primary { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 12px 22px; border-radius: 99px; background: #123f91; color: #fff; font-size: 15px; font-weight: 650; line-height: 1.5; text-decoration: none; }
.course-2027-primary:hover { background: #0e3275; }
.course-2027-text-link { display: inline-flex; align-items: center; min-height: 44px; color: #123f91; text-decoration: underline; text-underline-offset: 5px; font-size: 15px; }
:is(.course-2027-actions a,.home-course-poster,.poster-page a,.poster-page button,.poster-page summary):focus-visible { outline: 3px solid #123f91; outline-offset: 5px; }
.home-course-grid { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(0,1fr); align-items: center; gap: 40px; }
.home-course-poster { display: block; min-width: 0; }
.home-course-poster img { display: block; width: 100%; height: auto; border-radius: 12px; }
.home-course-poster > span { display: flex; align-items: center; justify-content: space-between; min-height: 44px; padding: 10px 2px; color: #123f91; font-size: 14px; }
.learning .home-course-copy h2 { margin: 0; font-size: clamp(28px,3vw,40px); line-height: 1.3; letter-spacing: -.025em; white-space: normal; }
.home-course-summary { margin: 12px 0 24px; max-width: 34em; color: #496583; font-size: 16px; line-height: 1.8; }
.home-course-copy .learning-title h3 { margin: 0; font-size: 19px; font-weight: 650; line-height: 1.6; }
.home-course-copy .learning-title h3 span { display: inline-block; color: #123f91; }
.home-course-copy .learning-flow { grid-template-columns: repeat(2,minmax(0,1fr)); margin-top: 18px; gap: 20px 24px; }
.home-course-copy .learning-flow article { padding: 0; min-height: 0; border: 0; }
.home-course-copy :is(.learning-staff,.flow-note) { display: none; }
.home-course-copy .learning-flow h4 { margin: 0 0 4px; font-size: 16px; line-height: 1.5; }
.home-course-copy .learning-flow p { margin: 0; font-size: 14px; line-height: 1.75; color: #496583; }
.course-2027-intro { display: grid; grid-template-columns: minmax(0,.85fr) minmax(0,1fr); gap: 56px; align-items: center; max-width: 1296px; margin: auto; padding: 64px 28px; scroll-margin-top: 140px; }
.course-2027-intro-copy h2 { margin: 0 0 20px; font-size: clamp(28px,3vw,42px); line-height: 1.35; letter-spacing: -.025em; }
.course-2027-intro-copy > p { max-width: 32em; color: #496583; font-size: 16px; line-height: 1.85; }
.course-intro-video { margin: 0; }
.course-video-frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #dceeff; border-radius: 12px; }
.course-video-frame img { display: block; width: 100%; height: 100%; object-fit: contain; }
.course-intro-video figcaption { padding-top: 12px; color: #496583; font-size: 14px; text-align: center; }
.course-video-cover { position: absolute; inset: 0; display: block; width: 100%; height: 100%; padding: 0; border: 0; background: transparent; cursor: pointer; }
.course-video-play { position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; align-items: center; gap: 8px; min-height: 46px; padding: 10px 18px; border-radius: 99px; background: #123f91; color: white; white-space: nowrap; font-size: 15px; }
.course-video-play svg { width: 20px; height: 20px; fill: currentColor; }
.course-video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: #10284a; }
.course-intro-video [hidden] { display: none; }
.course-video-tools { position: relative; display: flex; justify-content: center; align-items: center; gap: 24px; margin-top: 8px; }
.course-video-tools [data-course-video-close] { position: absolute; right: 0; top: 0; }
.course-video-tools :is(a,button) { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 0; border: 0; background: transparent; color: #123f91; font: inherit; font-size: 14px; text-decoration: underline; text-underline-offset: 5px; cursor: pointer; }
.course-intro-video :is(button,a):focus-visible { outline: 3px solid #123f91; outline-offset: -3px; }
.cohort-copy a.course-2027-text-link { margin-top: 8px; }

.poster-page { margin: 0; background: #f7fbff; color: #10284a; font-family: "PingFang SC","Microsoft YaHei",sans-serif; -webkit-font-smoothing: antialiased; }
.poster-page * { box-sizing: border-box; }
.poster-page a { color: inherit; }
.poster-page .course-2027-primary { color: #fff; }
.poster-skip { position: absolute; left: 18px; top: -100px; z-index: 10; padding: 12px; background: white; }
.poster-skip:focus { top: 8px; }
.poster-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; max-width: 1240px; margin: auto; padding: 20px 28px; }
.poster-brand { font-weight: 750; font-size: 24px; color: #123f91 !important; text-decoration: none; white-space: nowrap; }
.poster-header nav { display: flex; align-items: center; gap: 24px; }
.poster-header nav > a:first-child { display: inline-flex; align-items: center; min-height: 44px; font-size: 15px; text-decoration: none; }
.poster-heading { max-width: 856px; margin: auto; padding: 48px 28px 32px; }
.poster-heading h1 { margin: 0; font-size: clamp(30px,4vw,48px); line-height: 1.3; letter-spacing: -.025em; }
.poster-heading > p { max-width: 40em; margin: 18px 0 0; color: #496583; font-size: 16px; line-height: 1.8; }
.poster-nav { position: sticky; top: 0; z-index: 2; display: flex; justify-content: center; flex-wrap: wrap; gap: 4px 24px; padding: 10px 16px; border-block: 1px solid #d8e6f3; background: #f7fbff; }
.poster-nav a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; color: #123f91; font-size: 15px; }
.poster-nav a:hover { text-decoration: underline; text-underline-offset: 5px; }
.poster-chapter { max-width: 800px; margin: 44px auto 0; scroll-margin-top: 85px; }
.poster-chapter > header { padding: 0 24px 18px; }
.poster-chapter h2 { margin: 0; font-size: 24px; line-height: 1.4; }
.poster-chapter header p { margin: 10px 0 0; font-size: 14px; line-height: 1.75; color: #496583; }
.poster-image-link { display: block; margin: 0; padding: 0; line-height: 0; cursor: zoom-in; background: white; }
.poster-image-link img { display: block; width: 100%; height: auto; }
.poster-downloads { max-width: 800px; margin: 40px auto 0; padding: 24px; border-block: 1px solid #d8e6f3; }
.poster-downloads summary { cursor: pointer; padding-block: 10px; font-weight: 650; font-size: 16px; }
.poster-downloads p { color: #496583; font-size: 14px; line-height: 1.8; }
.poster-downloads ul { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px 20px; padding: 0; list-style: none; }
.poster-downloads a { display: inline-flex; align-items: center; min-height: 44px; font-size: 15px; text-underline-offset: 4px; }
.poster-close { max-width: 856px; margin: auto; padding: 52px 28px; }
.poster-close h2 { margin: 0; font-size: 28px; line-height: 1.4; }
.poster-close p { color: #496583; font-size: 16px; line-height: 1.8; }
.poster-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; max-width: 856px; margin: auto; padding: 24px 28px 40px; border-top: 1px solid #d8e6f3; font-size: 14px; color: #496583; }
.poster-zoom { width: min(96vw,1320px); max-width: 96vw; height: 90vh; max-height: 90vh; padding: 0; border: 0; border-radius: 12px; background: #f7fbff; color: #10284a; }
.poster-zoom::backdrop { background: rgba(16,40,74,.76); }
.poster-zoom[open] { display: flex; flex-direction: column; }
.poster-zoom-toolbar { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 12px 16px; border-bottom: 1px solid #d8e6f3; }
.poster-zoom-toolbar p { margin: 0; font-size: 14px; }
.poster-zoom-toolbar button { min-height: 44px; padding: 10px 16px; flex-shrink: 0; border: 1px solid #b8cde2; border-radius: 99px; background: white; color: #123f91; font: inherit; cursor: pointer; }
.poster-zoom-stage { overflow: auto; min-height: 0; flex: 1; overscroll-behavior: contain; }
.poster-zoom-stage img { display: block; max-width: none; height: auto; }
html.poster-zoom-open { overflow: hidden; }
@media (max-width: 900px) {
  .home-course-grid { grid-template-columns: 1fr; gap: 24px; }
  .course-2027-intro { gap: 30px; grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .home-course-poster picture { display: block; max-width: 360px; margin-inline: auto; }
  .home-course-poster > span { max-width: 360px; margin-inline: auto; }
  .home-course-copy .learning-title h3 { font-size: 18px; }
  .course-2027-intro { grid-template-columns: 1fr; padding: 40px 18px; gap: 28px; scroll-margin-top: 140px; }
  .course-video-play { left: 10px; bottom: 10px; transform: none; width: 44px; min-height: 44px; padding: 12px; gap: 0; font-size: 0; }
  .course-section-nav { gap: 6px 16px; flex-wrap: wrap; }
  .poster-header { padding: 14px 16px; gap: 12px; }
  .poster-brand { font-size: 20px; }
  .poster-header nav { gap: 12px; }
  .poster-header nav > a:first-child { font-size: 13px; }
  .poster-header .course-2027-primary { padding: 10px 14px; font-size: 13px; }
  .poster-heading { padding: 30px 18px 28px; }
  .poster-nav { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 12px; padding: 8px 18px; }
  .poster-nav a { font-size: 14px; justify-content: center; }
  .poster-chapter { margin-top: 32px; scroll-margin-top: 120px; }
  .poster-chapter > header { padding-inline: 18px; }
  .poster-downloads { padding: 20px 18px; }
  .poster-downloads ul { grid-template-columns: 1fr; }
  .poster-close { padding: 40px 18px; }
  .poster-footer { padding-inline: 18px; }
  .poster-zoom-toolbar { padding: 8px 12px; }
}