/* =========================
   semester1.css
   ========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: white;
  color: black;
}

/* 返回首页按钮 */
.back-home {
  position: fixed;
  top: 40px;
  left: 40px;
  border: 2px solid black;
  padding: 10px 14px;
  font-size: 18px;
  background: white;
  color: black;
  text-decoration: none;
  z-index: 10;
}

.back-home:hover {
  background: black;
  color: white;
}

.page {
  padding: 140px;
}

h2 {
  font-size: 40px;
  font-weight: normal;
  margin: 120px 0 24px;
}

/* Projects 1–4：两列 */
.projects {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  margin-bottom: 40px;
}

.project-title {
  font-size: 28px;
  margin-bottom: 18px;
}

/* JPG 当按钮：完整显示（不裁切） */
.project-link {
  display: block;
}

.project-link img {
  width: 100%;
  height: auto;     /* ✅ 完整显示 */
  display: block;
}

/* 轻微 hover（可删） */
.project-link:hover img {
  opacity: 0.92;
}

/* 文本按钮（DIEP / R） */
.text-btn {
  display: inline-block;
  margin: 10px 12px 0 0;
  padding: 10px 14px;
  border: 2px solid black;
  background: white;
  color: black;
  text-decoration: none;
  font-size: 18px;
}

.text-btn:hover {
  background: black;
  color: white;
}

/* R links 排版 */
.r-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 响应式 */
@media (max-width: 900px) {
  .page {
    padding: 100px 40px;
  }

  .projects {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #000;

  /* 背景图 */
  background-image: url("../images/background.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}