/* Join Us page: restrained academic recruitment layout. */
@media (min-width: 901px) {
  #join.page-panel.is-active {
    display: block;
    margin-top: calc(11px - clamp(52px, 6vw, 88px)) !important;
  }

  #join .join-panel {
    --join-viewport-gutter: max(
      0px,
      calc((100vw - var(--page-culture-share-width, 85vw)) / 2 - 7.5px)
    );
    display: grid;
    width: 100% !important;
    max-width: 100% !important;
    gap: clamp(18px, 1.5vw, 24px);
    margin: 0 auto;
    padding: 0;
  }

  #join .join-hero {
    position: relative;
    isolation: isolate;
    display: grid;
    min-height: clamp(390px, 27vw, 448px);
    grid-template-columns: minmax(560px, 1.08fr) minmax(500px, 0.92fr);
    padding: 0;
    place-content: stretch;
    overflow: visible;
    border: 1px solid rgba(114, 83, 65, 0.08);
    border-right: 0;
    border-radius: 8px 0 0 8px;
    text-align: left;
    background: transparent;
    box-shadow: none;
  }

  #join .join-hero::before {
    position: absolute;
    z-index: 0;
    inset: 0 42% 0 0;
    pointer-events: none;
    background:
      radial-gradient(circle at 18% 22%, rgba(255, 253, 248, 0.1), transparent 43%),
      linear-gradient(96deg, rgba(255, 253, 248, 0.1) 0%, rgba(255, 253, 248, 0.08) 68%, rgba(255, 253, 248, 0) 100%);
    content: "";
  }

  #join .join-hero::after { display: none; }

  #join .join-hero__content {
    --join-content-shift: 106px;
    --join-title-offset: 0px;
    position: relative;
    z-index: 2;
    transform: translateY(8px);
    display: flex;
    min-width: 0;
    flex-direction: column;
    justify-content: center;
    padding: clamp(34px, 3.2vw, 54px) clamp(30px, 3.2vw, 56px)
      clamp(34px, 3.2vw, 54px) calc(clamp(18px, 1.7vw, 30px) + var(--join-content-shift));
  }

  #join .join-hero__content > :not(.join-hero-wordmark) {
    position: relative;
    z-index: 1;
    transform: translateY(12px);
  }

  #join .join-hero-wordmark {
    position: absolute;
    z-index: 0;
    top: clamp(2px, 0.3vw, 6px);
    left: calc(clamp(10px, 1vw, 18px) + var(--join-title-offset) + var(--join-content-shift));
    pointer-events: none;
    color: rgba(47, 52, 57, 0.18);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(84px, 7.4vw, 124px) !important;
    font-weight: 700;
    line-height: 0.9 !important;
    letter-spacing: 0.04em;
    white-space: nowrap;
    user-select: none;
  }

  #join .join-hero-kicker {
    box-sizing: border-box;
    padding-inline-start: var(--join-title-offset);
    margin: 4px 0 0;
    color: var(--pku-red, #8c000b);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
    font-size: 14px !important;
    font-weight: 700 !important;
    line-height: 1.6 !important;
    letter-spacing: 0.22em;
  }

  #join .join-hero h2 {
    box-sizing: border-box;
    padding-inline-start: var(--join-title-offset);
    margin: 0;
    color: var(--pku-red-deep, #5d0008);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif !important;
    font-size: 56px !important;
    font-weight: 750 !important;
    line-height: 1.25 !important;
  }

  #join .join-hero h3 {
    width: max-content;
    max-width: 100%;
    margin: 18px 0 0;
    color: #25282a;
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif !important;
    font-size: 23px !important;
    font-weight: 650 !important;
    line-height: 1.5 !important;
  }

  #join .join-hero .join-hero-desc {
    max-width: 650px;
    margin: 12px 0 0;
    color: #5f6264;
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif !important;
    font-size: 20px !important;
    font-weight: 400 !important;
    line-height: 1.8 !important;
  }

  #join .join-hero .join-hero-desc > span {
    color: inherit;
    font-family: inherit !important;
    font-size: 20px !important;
    font-weight: 400 !important;
    line-height: 1.8 !important;
  }

  #join .join-highlights {
    --join-highlight-gap: clamp(16px, 1.6vw, 28px);
    display: grid;
    grid-template-columns: minmax(0, calc(460px - var(--join-highlight-gap))) minmax(0, 1fr);
    gap: var(--join-highlight-gap);
    margin-top: clamp(22px, 2vw, 30px);
    margin-left: -8px;
    width: calc(100% + 8px);
  }

  #join .join-highlight-item {
    display: grid;
    min-width: 0;
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 11px;
    align-items: center;
  }

  #join .join-highlight-icon {
    display: grid;
    width: 46px;
    height: 46px;
    place-items: center;
    border: 1px solid rgba(140, 0, 11, 0.18);
    border-radius: 50%;
    color: var(--pku-red, #8c000b);
    background: rgba(255, 255, 255, 0.72);
  }

  #join .join-highlight-icon svg,
  #join .join-card-icon svg,
  #join .join-cta svg {
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
  }

  #join .join-highlight-icon svg { width: 24px; height: 24px; }

  #join .join-highlight-copy {
    display: grid;
    min-width: 0;
    gap: 2px;
  }

  #join .join-highlight-copy strong {
    color: #2b2c2d;
    font-size: 20px !important;
    font-weight: 650 !important;
    line-height: 1.5 !important;
  }

  #join .join-highlight-copy small {
    color: #7a7774;
    font-size: 17px !important;
    font-weight: 450 !important;
    line-height: 1.6 !important;
    white-space: nowrap;
  }

  /* Keep the final Chinese glyph aligned with the welcome line above. */
  #join .join-highlight-item--open {
    transform: translateX(-10em);
  }

  html:lang(zh-CN) #join .join-hero h3 { white-space: nowrap; }

  #join .join-hero__media {
    position: relative;
    z-index: 1;
    min-width: 0;
    height: 100%;
    min-height: inherit;
    margin: 0;
    width: calc(100% + var(--join-viewport-gutter));
    margin-right: calc(0px - var(--join-viewport-gutter));
    overflow: hidden;
  }

  #join .join-hero__media::before {
    display: none;
    content: none;
  }

  #join .join-hero__media img {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    clip-path: polygon(13% 0, 100% 0, 100% 100%, 13% 100%, 0 64%, 0 36%);
  }

  #join .join-card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    gap: clamp(16px, 1.5vw, 24px);
    margin: 0 max(0px, calc(10vw - var(--fluid-page-gutter)));
  }

  #join .join-info-card {
    position: relative;
    display: grid;
    min-width: 0;
    min-height: clamp(286px, 20vw, 326px);
    grid-template-rows: auto 1fr;
    gap: 20px;
    padding: clamp(24px, 2vw, 32px) !important;
    overflow: hidden;
    border: 1px solid rgba(199, 218, 234, 0.76);
    border-radius: 8px !important;
    background: rgba(255, 255, 255, 0.74);
    box-shadow: 0 10px 30px rgba(42, 82, 115, 0.045);
    transition: border-color 180ms ease, box-shadow 180ms ease;
  }

  #join .join-info-card::before { display: none; }

  #join .join-info-card:hover {
    border-color: rgba(140, 29, 44, 0.24);
    box-shadow: 0 18px 38px rgba(54, 48, 45, 0.08);
    transform: none;
  }

  #join .join-card-header {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 14px;
  }

  #join .join-card-icon {
    display: grid;
    width: 48px;
    height: 48px;
    flex: 0 0 48px;
    margin: 0;
    place-items: center;
    border: 1px solid rgba(140, 0, 11, 0.12);
    border-radius: 50%;
    color: #fff;
    background: var(--pku-red, #8c000b);
  }

  #join .join-card-icon svg { width: 25px; height: 25px; }

  #join .join-card-header h3 {
    position: relative;
    margin: 0;
    padding-bottom: 8px;
    color: var(--pku-red-deep, #5d0008);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif !important;
    font-size: 23px !important;
    font-weight: 700 !important;
    line-height: 1.5 !important;
  }

  #join .join-card-header h3::after {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 34px;
    height: 2px;
    border-radius: 2px;
    background: var(--pku-red, #8c000b);
    content: "";
  }

  #join .join-card-list {
    display: grid;
    grid-template-rows: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  #join .join-card-list li {
    position: relative;
    display: block;
    min-width: 0;
    min-height: 0;
    padding-left: 18px;
    color: #505558;
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif !important;
    font-size: 17px !important;
    font-weight: 400 !important;
    line-height: 1.8 !important;
    overflow-wrap: break-word;
  }

  #join .join-card-list li::before {
    position: absolute;
    top: 0.72em;
    left: 0;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--pku-red, #8c000b);
    content: "";
  }

  #join .join-cta {
    position: relative;
    isolation: isolate;
    display: grid;
    min-width: 0;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(22px, 2vw, 34px);
    align-items: center;
    margin: 0 max(0px, calc(10vw - var(--fluid-page-gutter)));
    padding: clamp(22px, 2vw, 30px) clamp(26px, 2.4vw, 40px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    color: #fff;
    background:
      radial-gradient(circle at 56% -32%, rgba(198, 48, 34, 0.34), transparent 44%),
      radial-gradient(circle at 78% 118%, rgba(79, 0, 14, 0.28), transparent 46%),
      linear-gradient(110deg, #8f000c 0%, #a10812 34%, #7e0710 68%, #671018 100%);
    box-shadow: 0 12px 28px rgba(93, 0, 8, 0.18);
    overflow: hidden;
  }

  #join .join-cta::before {
    display: none;
  }

  #join .join-cta::after {
    display: none;
  }

  #join .join-cta-bg {
    position: absolute;
    z-index: 0;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    border-radius: inherit;
  }

  #join .join-cta-bg > span {
    position: absolute;
    display: block;
    pointer-events: none;
  }

  #join .join-cta-particles {
    inset: 0;
    background-image:
      radial-gradient(circle at 9% 78%, rgba(255, 227, 190, 0.08) 0 1px, transparent 1.8px),
      radial-gradient(circle at 20% 86%, rgba(255, 235, 205, 0.07) 0 1.1px, transparent 1.9px),
      radial-gradient(circle at 35% 72%, rgba(255, 215, 165, 0.09) 0 1px, transparent 1.8px),
      radial-gradient(circle at 42% 91%, rgba(255, 232, 196, 0.15) 0 1.4px, transparent 2.1px),
      radial-gradient(circle at 47% 24%, rgba(255, 224, 176, 0.12) 0 1px, transparent 1.8px),
      radial-gradient(circle at 52% 41%, rgba(255, 235, 205, 0.18) 0 1.4px, transparent 2.2px),
      radial-gradient(circle at 57% 16%, rgba(255, 210, 150, 0.14) 0 1px, transparent 1.8px),
      radial-gradient(circle at 61% 76%, rgba(255, 218, 170, 0.12) 0 1px, transparent 1.8px),
      radial-gradient(circle at 66% 30%, rgba(255, 232, 196, 0.16) 0 1.3px, transparent 2px),
      radial-gradient(circle at 71% 88%, rgba(255, 235, 205, 0.15) 0 1.2px, transparent 2px),
      radial-gradient(circle at 75% 18%, rgba(255, 216, 160, 0.13) 0 1px, transparent 1.8px),
      radial-gradient(circle at 80% 43%, rgba(255, 231, 195, 0.19) 0 1.5px, transparent 2.2px),
      radial-gradient(circle at 84% 75%, rgba(255, 214, 158, 0.12) 0 1px, transparent 1.8px),
      radial-gradient(circle at 89% 26%, rgba(255, 235, 205, 0.14) 0 1.2px, transparent 2px),
      radial-gradient(circle at 92% 86%, rgba(255, 235, 205, 0.16) 0 1.3px, transparent 2px),
      radial-gradient(circle at 96% 52%, rgba(255, 218, 170, 0.1) 0 1px, transparent 1.8px);
    opacity: 0.82;
  }

  #join .join-cta-flow {
    right: 2%;
    bottom: -1px;
    width: 78%;
    height: 72%;
    background: url("./assets/join-cta-flow.svg") right bottom / contain no-repeat;
    opacity: 0.52;
  }

  #join .join-cta-molecule {
    bottom: 2px;
    left: 32%;
    width: min(17vw, 250px);
    height: 72%;
    background: url("./assets/join-cta-molecule.svg") left bottom / contain no-repeat;
    opacity: 0.48;
  }

  #join .join-cta-building {
    right: clamp(132px, 10vw, 190px);
    bottom: -6px;
    width: min(42vw, 600px);
    height: 88%;
    background: url("./assets/join-cta-building.svg") right bottom / contain no-repeat;
    opacity: 0.44;
  }

  #join .join-cta > :not(.join-cta-bg) {
    position: relative;
    z-index: 2;
  }

  #join .join-cta__lead {
    display: grid;
    min-width: 0;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 15px;
    align-items: center;
  }

  #join .join-cta__lead-icon {
    display: grid;
    width: 48px;
    height: 48px;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
  }

  #join .join-cta__lead-icon svg { width: 23px; height: 23px; }

  #join .join-cta h3 {
    margin: 0;
    color: #fff;
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif !important;
    font-size: 20px !important;
    font-weight: 700 !important;
    line-height: 1.5 !important;
    white-space: nowrap;
  }

  #join .join-cta p {
    margin: 4px 0 0;
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px !important;
    font-weight: 450 !important;
    line-height: 1.6 !important;
  }

  #join .join-cta-actions { display: flex; justify-content: flex-end; }

  #join .join-primary-action {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 12px 20px;
    border: 1px solid rgba(255, 255, 255, 0.88);
    border-radius: 8px;
    color: var(--pku-red-deep, #5d0008);
    background: #fffdf9;
    box-shadow: 0 8px 20px rgba(45, 0, 4, 0.16);
    font-size: 17px !important;
    font-weight: 650 !important;
    line-height: 1.5 !important;
    white-space: nowrap;
    transition: background 160ms ease, box-shadow 160ms ease;
  }

  #join .join-primary-action svg { width: 19px; height: 19px; }

  #join .join-primary-action:hover {
    color: var(--pku-red-deep, #5d0008);
    background: #f8ecec;
    box-shadow: 0 10px 24px rgba(45, 0, 4, 0.2);
    transform: none;
  }

  #join .join-primary-action:focus-visible {
    outline: 3px solid rgba(255, 255, 255, 0.55);
    outline-offset: 3px;
  }
}

/* Keep the artwork page-bound while sizing it from the viewport width. */
body.is-join-page .content-shell {
  position: relative;
  isolation: isolate;
  background-color: #f7faff !important;
  background-image: none !important;
}

body.is-join-page .content-shell::before {
  content: "";
  position: absolute;
  z-index: 0;
  inset: var(--sticky-header-height, var(--header-height, 92px)) 0 0;
  pointer-events: none;
  background: #f7faff url("./assets/join-page-background.webp?v=20260901-join-background-20") center top / 100vw auto no-repeat;
}

body.is-join-page #join.page-panel.is-active {
  position: relative;
  z-index: 1;
  inline-size: 100% !important;
  max-inline-size: 100% !important;
  width: 100% !important;
  max-width: 100% !important;
}

/* The supplied artwork is the complete page backdrop; remove the former split hero photo. */
#join.page-panel.is-active .join-hero__media {
  display: none !important;
}

#join.page-panel.is-active .join-hero {
  grid-template-columns: minmax(0, 1fr) !important;
}

/* Preserve the PC composition under 125%-150% browser scaling. */
@media (min-width: 901px) and (max-width: 1250px) {
  #join .join-hero { grid-template-columns: minmax(0, 63%) minmax(0, 37%); }
  #join .join-hero__content { padding: 32px 30px 32px calc(20px + var(--join-content-shift)); }
  #join .join-highlights { gap: 12px; }
  #join .join-highlight-item { grid-template-columns: 40px minmax(0, 1fr); gap: 8px; }
  #join .join-highlight-icon { width: 40px; height: 40px; }
  #join .join-card-grid { gap: 14px; }
  #join .join-info-card { padding: 22px !important; }
  #join .join-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    padding: 22px 24px;
  }
  #join .join-cta__lead { grid-template-columns: 40px minmax(0, 1fr); gap: 10px; }
  #join .join-cta__lead-icon { width: 40px; height: 40px; }
  #join .join-primary-action { padding-inline: 15px; }
}