:root {
  --zjou-blue: #07559a;
  --zjou-deep: #032c55;
  --zjou-cyan: #20c6d7;
  --zjou-gold: #f2c94c;
  --zjou-ink: #10324d;
}

.zjou-nav-logo {
  width: 34px;
  height: auto;
  margin-right: .45rem;
  vertical-align: middle;
  image-rendering: auto;
}

.zjou-home .zjou-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--zjou-deep) !important;
}

.zjou-cover-rotator,
.zjou-cover,
.zjou-cover-rotator::after {
  position: absolute;
  inset: 0;
}

.zjou-cover-rotator {
  z-index: -2;
  overflow: hidden;
  background: var(--zjou-deep);
}

.zjou-cover-rotator::after {
  content: '';
  z-index: 2;
  background:
    linear-gradient(115deg, rgba(2, 33, 68, .88) 0%, rgba(2, 58, 99, .51) 47%, rgba(1, 21, 47, .72) 100%),
    linear-gradient(0deg, rgba(3, 44, 85, .28), transparent 55%);
}

.zjou-cover {
  z-index: 1;
  display: block;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  opacity: 0;
  transform: scale(1.03);
  animation: zjou-cover-fade 21s ease-in-out infinite;
  image-rendering: pixelated;
}

.zjou-cover-gate { background-image: url('/app/zjou/zjou-gate.webp'); animation-delay: 0s; }
.zjou-cover-ocean { background-image: url('/app/zjou/zjou-ocean.webp'); animation-delay: -7s; }
.zjou-cover-campus { background-image: url('/app/zjou/zjou-campus.webp'); animation-delay: -14s; }

@keyframes zjou-cover-fade {
  0%, 28% { opacity: 1; transform: scale(1.03); }
  35%, 95% { opacity: 0; transform: scale(1.08); }
  100% { opacity: 1; transform: scale(1.03); }
}

.zjou-home .navbar,
.zjou-home .splash,
.zjou-home #copyright,
.zjou-home .container {
  position: relative;
  z-index: 3;
}

.zjou-home .navbar {
  background: rgba(3, 44, 85, .55);
  border-bottom: 2px solid rgba(242, 201, 76, .75);
  box-shadow: 0 3px 0 rgba(2, 33, 68, .25);
}

.zjou-home .navbar-brand,
.zjou-home .navbar .nav-link {
  color: #fff !important;
  text-shadow: 2px 2px 0 rgba(2, 33, 68, .6);
}

.zjou-home .navbar-brand,
.zjou-skinlib .navbar-brand {
  font-family: "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-weight: 700;
}

.zjou-home .splash {
  top: 88px;
  height: calc(100% - 150px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: min(920px, 92%);
  padding: 2rem 1.5rem 4rem;
}

.zjou-brand-lockup {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: .4rem;
}

.zjou-logo {
  width: clamp(180px, 30vw, 300px);
  height: auto;
  filter: drop-shadow(3px 3px 0 rgba(3, 44, 85, .65));
}

.zjou-mascot {
  width: clamp(68px, 10vw, 108px);
  height: auto;
  image-rendering: pixelated;
  filter: drop-shadow(3px 3px 0 rgba(3, 44, 85, .65));
}

.zjou-home .splash-head {
  margin: .1em 0 .35em;
  padding: .45em .55em .25em;
  color: #fff;
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-family: "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-weight: 900;
  letter-spacing: .04em;
  text-shadow: 4px 4px 0 rgba(3, 44, 85, .75), 0 8px 18px rgba(0, 0, 0, .3);
}

.zjou-home .splash-subhead {
  max-width: 680px;
  margin: 0 auto 2rem;
  padding: .65rem 1rem;
  color: #f7fdff;
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.7;
  background: rgba(3, 44, 85, .52);
  border: 2px solid rgba(32, 198, 215, .65);
  box-shadow: 4px 4px 0 rgba(2, 33, 68, .45);
}

.zjou-home .main-button {
  display: inline-block;
  border: 3px solid var(--zjou-gold);
  border-radius: 0;
  color: #fff;
  background: var(--zjou-blue);
  box-shadow: 4px 4px 0 rgba(2, 33, 68, .72);
  font-family: "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-weight: 700;
  text-shadow: 2px 2px 0 rgba(2, 33, 68, .55);
}

.zjou-home .main-button:hover,
.zjou-home .main-button:focus {
  color: #fff;
  background: #0875c7;
  border-color: #ffe27b;
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(2, 33, 68, .72);
}

.zjou-home #copyright.without-intro {
  background: rgba(3, 44, 85, .68);
  border-top: 2px solid rgba(32, 198, 215, .55);
}

.zjou-home #intro {
  background: #f1fbff;
  border-top: 5px solid var(--zjou-cyan);
  color: var(--zjou-ink);
}

.zjou-home #intro h1,
.zjou-home #intro h3 {
  color: var(--zjou-deep);
  font-family: "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-weight: 800;
}

.zjou-home #intro i {
  color: var(--zjou-blue);
  text-shadow: 3px 3px 0 rgba(32, 198, 215, .35);
}

.zjou-home #footer-wrap {
  background: var(--zjou-deep);
  border-top: 4px solid var(--zjou-gold);
}

.zjou-home #copyright.with-intro {
  background: #021d38;
  border-top: 2px solid rgba(32, 198, 215, .45);
}

.zjou-skinlib {
  background: #eef7fb;
  color: var(--zjou-ink);
}

.zjou-skinlib .main-header {
  background: var(--zjou-deep) !important;
  border-bottom: 3px solid var(--zjou-gold);
}

.zjou-skinlib .main-header .navbar-brand,
.zjou-skinlib .main-header .nav-link {
  color: #fff !important;
}

.zjou-skinlib #unified-library {
  padding-top: 1.5rem;
}

.zjou-skinlib #unified-library > h1 {
  color: var(--zjou-deep);
  font-family: "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-weight: 900;
  text-shadow: 2px 2px 0 rgba(32, 198, 215, .35);
}

.zjou-skinlib #external-search,
.zjou-skinlib #external-results .card {
  border: 2px solid rgba(7, 85, 154, .28);
  border-radius: 0;
  box-shadow: 4px 4px 0 rgba(3, 44, 85, .12);
}

.zjou-skinlib #external-search {
  background: rgba(255, 255, 255, .9);
}

.zjou-skinlib #external-results .card {
  overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease;
}

.zjou-skinlib #external-results .card:hover {
  transform: translateY(-3px);
  box-shadow: 5px 7px 0 rgba(3, 44, 85, .18);
}

.zjou-skinlib #external-results .card-img-top {
  border-bottom: 2px solid rgba(7, 85, 154, .2);
  background: #dff3f7 !important;
}

.zjou-skinlib .btn-primary {
  background: var(--zjou-blue);
  border-color: var(--zjou-blue);
  border-radius: 0;
}

.zjou-skinlib .btn-outline-primary {
  color: var(--zjou-blue);
  border-radius: 0;
}

@media (max-width: 576px) {
  .zjou-home .navbar-brand { font-size: .9rem; }
  .zjou-nav-logo { width: 28px; }
  .zjou-brand-lockup { gap: .55rem; }
  .zjou-home .splash { padding-left: .7rem; padding-right: .7rem; }
  .zjou-home .splash-subhead { margin-bottom: 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  .zjou-cover { animation: none; opacity: 1; }
  .zjou-cover-ocean, .zjou-cover-campus { display: none; }
}