/* 学术活动模块基础样式：控制学术活动区块背景、卡片内容、日期和基础时间线结构。 */
.home-academic-section {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100%;
  padding: 2.15rem 2rem 1.9rem;
  overflow: hidden;
  border-radius: 28px;
  border: 1px solid rgba(0, 104, 183, 0.08);
  box-shadow: var(--shadow-soft);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(241, 247, 252, 0.96)),
    url("../images/decor/math-watermark.svg") center / 1480px auto no-repeat;
}

.home-academic-section .home-section-head {
  justify-content: center;
  margin-bottom: 1.45rem;
  text-align: center;
}

.home-academic-section .home-section-head h2 {
  margin: 0 auto;
}

.home-academic-section .home-section-head .home-section-more {
  display: none;
}

.home-academic-timeline {
  position: relative;
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.home-academic-track {
  position: relative;
  width: 100%;
  flex: 1;
  display: flex;
  align-items: center;
  min-height: 0;
}

.home-academic-list {
  position: relative;
  display: grid;
  align-content: center;
  gap: 1.2rem;
  width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
}

.home-academic-list::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(100% - 111px - 0.86rem);
  width: 2px;
  background: linear-gradient(
    180deg,
    rgba(0, 104, 183, 0.14) 0%,
    rgba(0, 104, 183, 0.42) 16%,
    rgba(0, 104, 183, 0.68) 54%,
    rgba(0, 104, 183, 0.24) 84%,
    rgba(0, 104, 183, 0.08) 100%
  );
  transform: translateX(-50%);
}

.home-academic-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 58px 82px;
  gap: 0.86rem;
  align-items: center;
  padding: 0;
  border-radius: 16px;
  transition: background-color 0.24s ease;
}

.home-academic-item:hover,
.home-academic-item:focus-within {
  background: linear-gradient(90deg, rgba(0, 104, 183, 0.03), rgba(0, 104, 183, 0));
}

.home-academic-date {
  display: grid;
  justify-items: start;
  gap: 0.1rem;
  align-self: center;
  text-align: left;
  transition: opacity 0.5s ease, transform 0.58s cubic-bezier(0.22, 1, 0.36, 1);
}

.home-academic-monthday,
.home-academic-year {
  display: block;
}

.home-academic-monthday {
  color: var(--color-primary-dark);
  font: 700 1.3rem/1 var(--font-title);
  letter-spacing: 0.03em;
  transition: color 0.16s ease, transform 0.16s ease;
}

.home-academic-year {
  color: rgba(24, 52, 77, 0.44);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  transition: color 0.16s ease;
}

.home-academic-marker {
  position: relative;
  align-self: center;
  min-height: 100%;
}

.home-academic-marker::before,
.home-academic-marker::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 999px;
  transform: translate(-50%, -50%);
  transition:
    transform 0.22s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.18s ease,
    background-color 0.18s ease,
    box-shadow 0.18s ease,
    border-color 0.18s ease;
  transition-delay: 0s;
}

.home-academic-marker::before {
  width: 14px;
  height: 14px;
  background: linear-gradient(180deg, #ffffff, #eef6fd);
  border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 6px rgba(0, 104, 183, 0.08);
}

.home-academic-marker::after {
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transform: translateX(-50%);
}

.home-academic-main {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  min-height: 190px;
  padding: 1.3rem 1.35rem 1.35rem;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(0, 104, 183, 0.1);
  border-top: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  transform-origin: right center;
  transition:
    transform 0.28s ease,
    border-color 0.24s ease,
    box-shadow 0.24s ease;
}

.home-academic-item:hover .home-academic-main,
.home-academic-item:focus-within .home-academic-main {
  transform: translateX(-5px) scale(1.018);
  border-color: rgba(0, 104, 183, 0.22);
  box-shadow: 0 8px 18px rgba(0, 63, 115, 0.04);
}

.home-academic-main h3 {
  margin: 0;
  color: var(--color-primary-dark);
  font: 700 1.08rem/1.5 var(--font-title);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-height: calc(1em * 1.6 + 0.2rem);
  line-height: 1.6;
  padding-top: 0.1rem;
  transition: color 0.24s ease;
}

.home-academic-meta {
  display: grid;
  gap: 0.45rem;
  margin: 0.95rem 0 0;
}

.home-academic-meta div {
  display: flex;
  gap: 0.72rem;
  min-width: 0;
  font-size: 0.92rem;
  line-height: 1.65;
}

.home-academic-meta dt {
  min-width: 2.5em;
  color: var(--color-primary);
  flex: 0 0 auto;
}

.home-academic-meta dd {
  margin: 0;
  min-width: 0;
  color: var(--color-muted);
  transition: color 0.24s ease;
}

.home-academic-link-cover {
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: 16px;
}

.home-academic-link-cover:focus-visible {
  outline: 2px solid rgba(0, 104, 183, 0.45);
  outline-offset: 3px;
}

.home-academic-item:hover .home-academic-date,
.home-academic-item:focus-within .home-academic-date {
  transform: translateY(-2px);
}

.home-academic-item:hover .home-academic-monthday,
.home-academic-item:focus-within .home-academic-monthday {
  color: var(--color-primary);
  transform: scale(1.04);
}

.home-academic-item:hover .home-academic-year,
.home-academic-item:focus-within .home-academic-year {
  color: rgba(0, 63, 115, 0.72);
}

.home-academic-item:hover .home-academic-marker::before,
.home-academic-item:focus-within .home-academic-marker::before {
  transform: translate(-50%, -50%) scale(1.24);
  background: var(--color-primary);
  border-color: rgba(255, 255, 255, 0.96);
  box-shadow:
    0 0 0 10px rgba(0, 104, 183, 0.13),
    0 10px 22px rgba(0, 63, 115, 0.12);
}

.home-academic-item:hover .home-academic-main h3,
.home-academic-item:focus-within .home-academic-main h3 {
  color: var(--color-primary);
}

.home-academic-item:hover .home-academic-meta dd,
.home-academic-item:focus-within .home-academic-meta dd {
  color: #44627b;
}

@media (max-width: 767.98px) {
  .home-academic-section {
    padding: 1.7rem 1.2rem 1.45rem;
  }

  .home-academic-item {
    grid-template-columns: minmax(0, 1fr) 38px 52px;
    gap: 0.66rem;
  }

  .home-academic-list::before {
    left: calc(100% - 71px - 0.66rem);
  }

  .home-academic-monthday {
    font-size: 1rem;
  }

  .home-academic-year {
    font-size: 0.7rem;
    letter-spacing: 0.08em;
  }

  .home-academic-main {
    min-height: 176px;
    padding: 1rem 1rem 1.02rem;
  }

  .home-academic-main h3 {
    font-size: 1rem;
    min-height: calc(1em * 1.6 + 0.18rem);
  }

  .home-academic-meta div {
    gap: 0.55rem;
    font-size: 0.86rem;
  }
}