/* ==========================================================
   杨培根 · 个人主页样式
   主题色：中国农业大学绿
   ========================================================== */

:root {
  --primary: #0d7a3d;          /* 农大绿 */
  --primary-dark: #085c2e;
  --primary-light: #e8f3ec;    /* 浅绿背景 */
  --accent: #1d9e56;
  --text: #2b2f32;
  --text-light: #6b7470;
  --bg: #eef2ef;
  --panel-bg: #ffffff;
  --border: #e2e7e4;
  --navbar-h: 56px;
  --shadow: 0 1px 4px rgba(20, 60, 40, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: Georgia, "Times New Roman", "Songti SC", SimSun, serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  padding-top: var(--navbar-h);
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 18px;
}
.container.narrow { max-width: 780px; }

/* ---------- 顶部导航 ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--navbar-h);
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: 100;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.brand {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover { color: var(--primary-dark); }

.nav-links {
  list-style: none;
  display: flex;
  gap: 4px;
  font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
  font-size: 14px;
}
.nav-links a {
  display: block;
  padding: 6px 10px;
  color: var(--text-light);
  text-decoration: none;
  border-radius: 4px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); font-weight: 600; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--primary);
  cursor: pointer;
}

/* ---------- 面板卡片 ---------- */
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow);
  margin: 22px 0;
  overflow: hidden;
}
.panel-heading {
  padding: 10px 18px;
  font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  background: #fff;
  border-bottom: 1px solid var(--border);
  border-left: 4px solid var(--primary);
}
.panel-body { padding: 18px 20px; }

/* ---------- 个人简介 ---------- */
.bio {
  display: flex;
  gap: 26px;
  align-items: flex-start;
}
.bio-photo img {
  width: 150px;
  height: 200px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.bio-text p { margin-bottom: 10px; text-align: justify; }
.bio-links a { color: var(--primary); text-decoration: none; }
.bio-links a:hover { text-decoration: underline; }

/* ---------- 信息表格 ---------- */
.info-table {
  width: 100%;
  border-collapse: collapse;
}
.info-table th, .info-table td {
  padding: 7px 10px;
  border-bottom: 1px solid #f0f3f1;
  text-align: left;
  vertical-align: top;
}
.info-table th {
  width: 110px;
  font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
}
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: none; }

/* ---------- 研究兴趣 ---------- */
.interest-list { list-style: none; }
.interest-list li {
  position: relative;
  padding: 4px 0 4px 18px;
  text-align: justify;
}
.interest-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 14px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

/* ---------- 技能 ---------- */
.skill-block { margin-bottom: 14px; }
.skill-block:last-child { margin-bottom: 0; }
.skill-label {
  font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 6px;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-block;
  padding: 3px 12px;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 13px;
  color: var(--primary-dark);
  background: var(--primary-light);
  border: 1px solid #cfe6d8;
  border-radius: 999px;
}

/* ---------- 项目 ---------- */
.project { margin-bottom: 20px; }
.project:last-child { margin-bottom: 0; }
.project-title {
  font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 6px;
}
.project-meta {
  display: block;
  font-size: 12.5px;
  font-weight: 400;
  color: var(--text-light);
  margin-top: 2px;
}
.project ul { padding-left: 20px; }
.project li { margin: 3px 0; text-align: justify; }
.project a { color: var(--primary); }

/* ---------- 获奖 ---------- */
.award-list { list-style: none; }
.award-list li {
  position: relative;
  padding: 4px 0 4px 86px;
  text-align: justify;
}
.award-list .year {
  position: absolute;
  left: 0; top: 4px;
  width: 72px;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 13px;
  color: var(--text-light);
}

/* ---------- 联系方式 ---------- */
.contact div { padding: 4px 0; }
.contact a { color: var(--primary); text-decoration: none; }
.contact a:hover { text-decoration: underline; }

/* ---------- 个人陈述页 ---------- */
.statement p { margin-bottom: 12px; text-align: justify; }
.statement h3 {
  font-family: "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
  font-size: 16px;
  color: var(--primary-dark);
  margin: 22px 0 8px;
  padding-left: 10px;
  border-left: 4px solid var(--primary);
}
.statement-sig { font-weight: 600; }
.statement-list { padding-left: 22px; }
.statement-list li { margin: 4px 0; text-align: justify; }
.statement-end { margin-top: 22px; text-align: right; }

/* ---------- 页脚 ---------- */
.footer {
  margin-top: 30px;
  padding: 18px 0 26px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 13px;
  color: var(--text-light);
}

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: var(--navbar-h);
    left: 0; right: 0;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 8px 18px;
  }
  .nav-links.open { display: flex; }
  .bio { flex-direction: column; align-items: center; text-align: center; }
  .bio-text p { text-align: left; }
  .award-list li { padding-left: 0; }
  .award-list .year { position: static; display: inline-block; margin-right: 8px; }
}