/* ============================================================
   个人主页样式 —— 简洁学术风
   配色：纸白 #f4f2ec / 深青 #194f50 / 砖红 #c44c32
   ============================================================ */

:root {
  --ink:    #172227;
  --muted:  #657277;
  --paper:  #f4f2ec;
  --card:   #ffffff;
  --accent: #c44c32;
  --teal:   #194f50;
  --line:   #d6dbd7;
  --soft:   #e9ece7;

  --font-body: Inter, "Segoe UI", system-ui, "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  --font-head: Georgia, "Times New Roman", "Microsoft YaHei", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 顶部锚点留白，避免被吸顶导航挡住 */
section[id] { scroll-margin-top: 80px; }

a { color: var(--teal); }

.skip-link {
  position: absolute;
  left: -999px;
  background: #fff;
  padding: .6rem 1rem;
  z-index: 99;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ---------------- 顶栏 ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(244, 242, 236, .94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(23, 34, 39, .1);
}

.nav-wrap {
  max-width: 1180px;
  height: 62px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.wordmark {
  font: 700 1.08rem var(--font-head);
  color: var(--ink);
  text-decoration: none;
  letter-spacing: .01em;
}
.wordmark span {
  color: var(--teal);
  margin-left: 8px;
  font-size: .78em;
  font-weight: 600;
}

.nav-wrap nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
}
.nav-wrap nav a {
  color: var(--ink);
  font-size: .82rem;
  font-weight: 700;
  text-decoration: none;
  transition: color .15s;
}
.nav-wrap nav a:hover { color: var(--accent); }

/* 中英文切换 */
.nav-wrap nav a.lang-switch {
  border: 1px solid var(--line);
  border-radius: 99px;
  background: #fff;
  color: var(--teal);
  font-size: .72rem;
  padding: 2px 11px;
  line-height: 1.7;
}
.nav-wrap nav a.lang-switch:hover {
  border-color: var(--teal);
  color: var(--teal);
}

/* ---------------- 页面骨架 ---------------- */
.page-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 34px 24px 46px;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

/* ---------------- 左侧个人卡 ---------------- */
.profile {
  position: sticky;
  top: 86px;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(29, 54, 54, .06);
}

.portrait {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center 18%;
  background: var(--teal);
}

.profile-copy {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--line);
}

.kicker {
  margin: 0 0 7px;
  font-size: .64rem;
  letter-spacing: .14em;
  font-weight: 800;
  color: var(--accent);
}

.profile h1 {
  font: 700 1.85rem/1.1 var(--font-head);
  margin: 0;
}
.profile h1 small {
  display: block;
  font-size: .5em;
  font-weight: 600;
  color: var(--teal);
  margin-top: 5px;
  letter-spacing: .04em;
}

.role {
  font-size: .94rem;
  font-weight: 750;
  margin: 12px 0 4px;
}

.institution {
  font-size: .82rem;
  color: var(--muted);
  margin: 0;
}

.profile-facts {
  margin: 0;
  padding: 14px 20px;
}
.profile-facts div {
  padding: 9px 0;
  border-bottom: 1px solid var(--soft);
}
.profile-facts div:last-child { border: 0; }
.profile-facts dt {
  font-size: .62rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 800;
}
.profile-facts dd {
  margin: 3px 0 0;
  font-size: .82rem;
  word-break: break-all;
}
.profile-facts a {
  color: var(--teal);
  font-weight: 700;
  text-decoration: none;
}
.profile-facts a:hover { text-decoration: underline; }

.profile-actions { padding: 2px 20px 20px; }

.button {
  display: block;
  background: var(--teal);
  color: #fff;
  text-align: center;
  text-decoration: none;
  padding: 10px 12px;
  font-size: .78rem;
  font-weight: 800;
  transition: background .15s;
}
.button:hover { background: #123c3d; }

.profile-actions div {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}
.profile-actions div a {
  font-size: .75rem;
  color: var(--teal);
  font-weight: 800;
  text-decoration: none;
}
.profile-actions div a:hover { color: var(--accent); }

/* ---------------- 右侧正文 ---------------- */
.content {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 8px 38px 36px;
}

.content > section,
.lower-grid > section {
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 11px;
  margin-bottom: 16px;
}
.section-heading span {
  font: italic .8rem var(--font-head);
  color: var(--accent);
}
.section-heading h2 {
  font: 700 1.5rem/1.15 var(--font-head);
  margin: 0;
}

/* 关于 */
.intro-grid {
  display: grid;
  grid-template-columns: 1.6fr .8fr;
  gap: 28px;
}

.prose p {
  margin: 0 0 11px;
  font: 1.05rem/1.7 var(--font-head);
  color: #26333a;
}
.prose p:last-child { margin-bottom: 0; }

.at-a-glance {
  display: grid;
  gap: 8px;
  align-content: start;
}
.at-a-glance div {
  display: grid;
  grid-template-columns: 44px 1fr;
  align-items: center;
  gap: 8px;
  background: var(--paper);
  padding: 9px 11px;
}
.at-a-glance strong {
  font: 700 1.25rem var(--font-head);
  color: var(--teal);
}
.at-a-glance span {
  font-size: .69rem;
  color: var(--muted);
  line-height: 1.35;
}

/* 工作方向 */
.interest-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.interest-list article {
  display: flex;
  gap: 11px;
  padding: 16px;
  background: var(--paper);
  border-top: 3px solid var(--teal);
}
.interest-list b {
  font: italic .78rem var(--font-head);
  color: var(--accent);
  padding-top: 3px;
}
.interest-list h3 {
  font: 700 .96rem/1.35 var(--font-head);
  margin: 0 0 6px;
}
.interest-list p {
  font-size: .74rem;
  line-height: 1.5;
  color: var(--muted);
  margin: 0;
}

/* 项目 */
.publication {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  padding: 17px 0;
  border-top: 1px solid var(--soft);
}
.publication:first-of-type {
  border-top: 0;
  padding-top: 2px;
}
.pub-index {
  font: italic .8rem var(--font-head);
  color: var(--accent);
}

.pub-meta {
  display: flex;
  gap: 7px;
  margin-bottom: 6px;
}
.pub-meta span {
  font-size: .68rem;
  padding: 3px 8px;
  background: var(--soft);
  color: var(--teal);
  font-weight: 800;
}
.pub-meta span:first-child {
  background: var(--teal);
  color: #fff;
}

.pub-body h3 {
  font: 700 1.08rem/1.4 var(--font-head);
  margin: 0 0 6px;
}
.pub-body p {
  font-size: .82rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}

.pub-links {
  display: flex;
  gap: 16px;
  margin-top: 9px;
}
.pub-links a {
  font-size: .76rem;
  color: var(--teal);
  font-weight: 800;
  text-decoration: none;
}
.pub-links a:hover { color: var(--accent); }

.publication-note {
  margin: 4px 0 0 50px;
  font-size: .68rem;
  color: var(--muted);
}

/* 论文分组小标题 */
.group-title {
  font: 800 .72rem var(--font-body);
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 26px 0 2px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.group-title:first-of-type { margin-top: 4px; }

/* 项目成果脚注 */
.pub-body .pub-note {
  margin-top: 7px;
  font-size: .73rem;
  color: var(--accent);
  font-weight: 700;
}

/* 荣誉列表 */
.honor {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--soft);
}
.honor:last-child { border-bottom: 0; padding-bottom: 0; }
.honor time {
  font: italic .78rem var(--font-head);
  color: var(--accent);
  padding-top: 2px;
}
.honor h3 {
  font: 700 .88rem/1.45 var(--font-head);
  margin: 0 0 2px;
}
.honor p {
  font-size: .74rem;
  color: var(--muted);
  margin: 0;
}

/* 经历 + 联系 */
.lower-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 30px;
}
.lower-grid > section {
  border-bottom: 0;
  padding-bottom: 0;
}

.education-item {
  padding: 0 0 14px;
  margin-bottom: 13px;
  border-bottom: 1px solid var(--soft);
}
.education-item:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}
.education-item time {
  display: block;
  font: italic .78rem var(--font-head);
  color: var(--accent);
  margin-bottom: 4px;
}
.education-item h3 {
  font: 700 .92rem/1.45 var(--font-head);
  margin: 0 0 4px;
}
.education-item p {
  font-size: .75rem;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

.contact-text {
  font-size: .84rem;
  color: var(--muted);
  margin: 0;
  line-height: 1.65;
}
.contact-link {
  display: block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-size: .76rem;
  font-weight: 800;
  padding: 10px 12px;
  margin-top: 16px;
  word-break: break-all;
  transition: background .15s;
}
.contact-link:hover { background: #a83e28; }

/* ---------------- 页脚 ---------------- */
footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 4px 24px 28px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: .7rem;
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
  .nav-wrap nav a:not(.lang-switch) { display: none; }
  .nav-wrap nav { margin-left: auto; }

  .page-shell {
    grid-template-columns: 1fr;
    padding: 20px 17px 36px;
    gap: 18px;
  }

  .profile {
    position: static;
    display: grid;
    grid-template-columns: 130px 1fr;
  }
  .portrait {
    height: 100%;
    min-height: 172px;
  }
  .profile-copy {
    border: 0;
    padding: 18px;
  }
  .profile-facts {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    padding: 4px 18px 0;
  }
  .profile-facts div { border: 0; }
  .profile-actions {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px 18px 16px;
  }
  .profile-actions .button { flex: 1; }
  .profile-actions div { margin: 0; }

  .content { padding: 4px 20px 26px; }
  .intro-grid,
  .lower-grid,
  .interest-list { grid-template-columns: 1fr; }
  .at-a-glance { grid-template-columns: repeat(2, 1fr); }
  .publication-note { margin-left: 0; }
}

@media (max-width: 560px) {
  .profile { grid-template-columns: 104px 1fr; }
  .profile h1 { font-size: 1.5rem; }
  .profile-facts { grid-template-columns: 1fr; gap: 0; }
  .profile-actions { display: block; }
  .profile-actions div { margin-top: 11px; }
  .at-a-glance { grid-template-columns: 1fr; }
  .publication { grid-template-columns: 28px 1fr; }
  .pub-meta { flex-wrap: wrap; }
  footer { flex-direction: column; gap: 6px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

/* 打印 */
@media print {
  .site-header, .profile-actions, .skip-link { display: none; }
  body { background: #fff; }
  .page-shell { display: block; padding: 0; }
  .profile, .content { border: 0; box-shadow: none; }
}