:root {
  --primary: #a31e34;
  --primary-dark: #7e0404;
  --gold: #f2c182;
  --text: #333;
  --secondary: #777;
  --border: #d0d0d0;
  --light: #faf9f7;
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a { color: inherit; text-decoration: none; }
.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link { position: fixed; z-index: 9999; top: -60px; left: 20px; padding: 10px 16px; color: var(--primary); background: #fff; }
.skip-link:focus { top: 12px; }

.site-header { position: absolute; z-index: 100; top: 0; right: 0; left: 0; color: #fff; transition: background .25s, box-shadow .25s; }
.site-header.scrolled { position: fixed; color: #fff; background: rgba(163,30,52,.98); box-shadow: 0 0 12px rgba(72,0,14,.24); }
.header-inner { min-height: 90px; display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.brand { display: flex; flex: 0 0 auto; align-items: center; gap: 15px; }
.brand-logo { width: 258px; height: auto; display: block; }
.brand-divider { width: 1px; height: 30px; background: currentColor; opacity: .45; }
.college-name { font-family: "STSong", "SimSun", serif; font-size: 18px; letter-spacing: .06em; white-space: nowrap; }









.inner-banner {
  position: relative; min-height: 430px; display: flex; align-items: flex-end; overflow: hidden;
  color: #fff; background:
    linear-gradient(90deg, rgba(73,3,20,.96), rgba(126,4,4,.77) 58%, rgba(163,30,52,.44)),
    radial-gradient(circle at 78% 46%, rgba(242,193,130,.24) 0 2px, transparent 3px 85px, rgba(242,193,130,.18) 86px 88px, transparent 89px 145px, rgba(242,193,130,.14) 146px 148px, transparent 149px),
    linear-gradient(130deg, #560d1b, #a31e34 56%, #7e0404);
  background-size: cover;
}
.inner-banner::before { content: ""; position: absolute; inset: 0; background: linear-gradient(145deg, transparent 0 58%, rgba(242,193,130,.12) 58.2% 58.5%, transparent 58.7%), linear-gradient(25deg, transparent 0 71%, rgba(255,255,255,.08) 71.2% 71.5%, transparent 71.7%); }
.banner-lines { position: absolute; inset: 0 0 0 54%; opacity: .18; background: repeating-linear-gradient(114deg, transparent 0 49px, var(--gold) 50px 51px); transform: skewX(-8deg); }
.banner-content { position: relative; z-index: 1; display: flex; align-items: stretch; padding-top: 150px; padding-bottom: 86px; }
.banner-icon { width: 76px; display: flex; align-items: flex-start; padding-top: 8px; color: var(--gold); border-right: 1px solid rgba(255,255,255,.42); }
.banner-icon svg { width: 52px; height: 52px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.banner-text { margin-left: 30px; }
.banner-text h1 { margin: 0; font-size: clamp(42px, 4vw, 56px); font-weight: 400; line-height: 1.35; letter-spacing: .08em; }
.breadcrumb { display: flex; align-items: center; gap: 12px; margin-top: 12px; color: rgba(255,255,255,.75); font-size: 13px; }
.breadcrumb a:hover { color: #fff; }

.category-block { position: relative; z-index: 5; margin-top: -40px; overflow: hidden; }
.category-nav { height: 80px; display: flex; justify-content: center; background: var(--light); box-shadow: 0 20px 40px rgba(0,0,0,.06); }
.category-item { position: relative; min-width: 210px; height: 100%; overflow: hidden; border: 0; border-right: 1px dashed var(--border); color: var(--text); background: var(--light); cursor: pointer; transition: color .3s, background .3s; }
.category-item:first-child { border-left: 1px dashed var(--border); }
.category-number { position: absolute; inset: 50% 0 auto; color: #000; font: 85px/1 Arial, sans-serif; opacity: .025; text-align: center; transform: translateY(-50%); }
.category-name { position: relative; z-index: 1; font-size: 18px; }
.category-item:hover, .category-item.active { color: #fff; background: var(--primary); border-color: var(--primary); }
.category-item:hover .category-number, .category-item.active .category-number { color: #fff; opacity: .07; }

.expert-section { padding: 66px 0 88px; }
.section-copy { color: #60646a; font-size: 16px; line-height: 2; text-align: justify; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; margin: 48px 0 22px; padding-bottom: 16px; border-bottom: 1px solid #e7e7e7; }
.heading-en { display: block; margin-bottom: 3px; color: var(--primary); font-size: 11px; font-weight: 700; letter-spacing: .2em; }
.section-heading h2 { margin: 0; font-size: 28px; font-weight: 400; }
.section-heading p { margin: 0; color: var(--secondary); font-size: 13px; }
.section-heading strong { color: var(--primary); font-size: 20px; }

.expert-list { display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; background: var(--light); border-top: 1px dashed var(--border); border-left: 1px dashed var(--border); }
.expert-item { position: relative; min-height: 178px; padding: 30px; overflow: hidden; border: 0; border-right: 1px dashed var(--border); border-bottom: 1px dashed var(--border); color: var(--text); background: var(--light); text-align: left; cursor: default; transition: color .3s, background .3s, border-color .3s; }
.expert-item::before { content: "ECNU"; position: absolute; top: 19px; left: 23px; width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid currentColor; border-radius: 50%; color: var(--primary); font: 700 8px Georgia, serif; opacity: .1; }
.expert-item::after { content: ""; position: absolute; right: 25px; bottom: 21px; width: 92px; height: 18px; opacity: .18; background: repeating-linear-gradient(135deg, transparent 0 9px, var(--primary) 10px 11px); }
.expert-item > * { position: relative; z-index: 1; }
.expert-item:hover { color: #fff; background: var(--primary); border-color: var(--primary); }
.expert-item:hover::before { color: #fff; opacity: .14; }
.expert-item:hover::after { background: repeating-linear-gradient(135deg, transparent 0 9px, #fff 10px 11px); opacity: .45; }
.expert-name { margin: 0 0 15px; font-size: 19px; font-weight: 400; }
.expert-meta, .expert-intro { margin: 0; color: #808080; font-size: 13px; transition: color .3s; }
.expert-intro { margin-top: 6px; }
.expert-item:hover .expert-meta, .expert-item:hover .expert-intro { color: rgba(255,255,255,.86); }

.site-footer { color: rgba(255,255,255,.75); background: #5d0b19; }
.footer-grid { display: grid; grid-template-columns: 1.35fr .75fr 1fr 1fr; gap: 58px; padding: 62px 0 52px; }
.footer-logo { display: flex; align-items: center; gap: 13px; margin-bottom: 18px; color: #fff; }
.footer-logo img { width: 214px; height: auto; }
.footer-logo strong { font-family: "STSong", "SimSun", serif; font-size: 16px; font-weight: 400; line-height: 1.4; letter-spacing: .06em; white-space: nowrap; }
.site-footer h2 { margin: 7px 0 16px; color: #fff; font-size: 16px; font-weight: 400; }
.site-footer p, .site-footer a { display: block; margin: 7px 0; font-size: 13px; }
.site-footer a:hover { color: #fff; }
.footer-bottom { padding: 17px 0; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.45); font-size: 12px; }
.back-to-top { position: fixed; z-index: 20; right: 24px; bottom: 24px; width: 44px; height: 44px; border: 0; color: #fff; background: var(--primary); cursor: pointer; opacity: 0; visibility: hidden; transition: opacity .2s; }
.back-to-top.show { opacity: 1; visibility: visible; }

@media (max-width: 1100px) {
  .college-name, .brand > .brand-divider { display: none; }
  .brand-logo { width: 235px; }

  .expert-list { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .header-inner { min-height: 80px; }
  .brand-logo { width: 220px; }






  .category-nav { height: 70px; }
  .category-item { min-width: 0; flex: 1; }
  .category-number { font-size: 66px; }
  .category-name { font-size: 15px; }
  .expert-list { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 1 / -1; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); }
}

@media (max-width: 600px) {
  .container { width: min(calc(100% - 30px), var(--container)); }
  .brand-logo { width: 190px; }
  .inner-banner { min-height: 300px; }
  .banner-content { padding-top: 115px; padding-bottom: 57px; }
  .banner-icon { width: 56px; }
  .banner-icon svg { width: 40px; height: 40px; }
  .banner-text { margin-left: 19px; }
  .banner-text h1 { font-size: 36px; }
  .breadcrumb { margin-top: 7px; font-size: 12px; }
  .category-block { margin-top: 0; }
  .category-block .container { width: 100%; }
  .category-nav { height: 62px; box-shadow: none; }
  .category-name { font-size: 13px; }
  .category-number { display: none; }
  .category-item.active { color: var(--primary); background: var(--light); }
  .category-item.active::after { content: ""; position: absolute; right: 18px; bottom: 0; left: 18px; height: 2px; background: var(--primary); }
  .expert-section { padding: 42px 0 60px; }
  .section-copy { font-size: 14px; line-height: 1.9; }
  .section-heading { margin-top: 36px; }
  .section-heading h2 { font-size: 24px; }
  .expert-list { grid-template-columns: 1fr; }
  .expert-item { min-height: 145px; padding: 23px 20px; border-right: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px 20px; padding: 45px 0; }
  .footer-about, .footer-grid > div:last-child { grid-column: 1 / -1; }
  .back-to-top { right: 15px; bottom: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}

.expert-panel {
    display: none;
}

.expert-panel.active {
    display: block;
}