/* MamboLab · 视觉语言沿用第一版（蓝强调色 + 卡片 + 大留白），内容结构沿用分页学术站 */

:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-alt: #f7f8fa;
  --fg: #101828;
  --fg-soft: #5b6472;
  --muted: #667085;
  --faint: #98a2b3;
  --border: #e6e8ec;
  --line: #e6e8ec;
  --accent: #1d4ed8;
  --accent-soft: #eff4ff;
  --pill: #f2f4f8;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px -12px rgba(16, 24, 40, .12);
  --shadow-lift: 0 2px 6px rgba(16, 24, 40, .06), 0 18px 36px -18px rgba(16, 24, 40, .2);
  --maxw: 1040px;
  --maxw-wide: 1040px;
  --maxw-narrow: 800px;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

html[data-theme="dark"] {
  --bg: #0b0d10;
  --bg-soft: #111418;
  --bg-alt: #111418;
  --fg: #eceef1;
  --fg-soft: #a2aab6;
  --muted: #9aa3b0;
  --faint: #6b7480;
  --border: #232830;
  --line: #232830;
  --accent: #7aa2ff;
  --accent-soft: #16213a;
  --pill: #1a1f26;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .6);
  --shadow-lift: 0 2px 6px rgba(0, 0, 0, .4), 0 18px 36px -18px rgba(0, 0, 0, .7);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --bg: #0b0d10;
    --bg-soft: #111418;
    --bg-alt: #111418;
    --fg: #eceef1;
    --fg-soft: #a2aab6;
    --muted: #9aa3b0;
    --faint: #6b7480;
    --border: #232830;
    --line: #232830;
    --accent: #7aa2ff;
    --accent-soft: #16213a;
    --pill: #1a1f26;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .6);
    --shadow-lift: 0 2px 6px rgba(0, 0, 0, .4), 0 18px 36px -18px rgba(0, 0, 0, .7);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

h1, h2, h3, h4 { font-weight: 650; line-height: 1.35; letter-spacing: -.015em; }
p { margin: 0 0 1rem; }
img { max-width: 100%; display: block; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
.wrap-wide { max-width: var(--maxw-wide); margin: 0 auto; padding: 0 28px; }
.wrap-narrow { max-width: var(--maxw-narrow); }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw-wide); margin: 0 auto; padding: 14px 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px; background: var(--fg); color: var(--bg);
  display: grid; place-items: center; font-size: 15px; font-weight: 700; letter-spacing: -.02em;
}
.brand-text { font-weight: 650; font-size: 16px; letter-spacing: -.01em; }
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links > a, .nav-links > .dd > button {
  color: var(--fg-soft); font-size: 14.5px; font-weight: 500; background: none; border: 0; padding: 0;
  font-family: inherit; cursor: pointer; transition: color .15s;
}
.nav-links > a:hover, .nav-links > .dd > button:hover { color: var(--fg); text-decoration: none; }
.nav-links > a.active { color: var(--accent); font-weight: 600; }

.icon-btn {
  background: none; border: 0; cursor: pointer; color: var(--fg-soft);
  padding: 5px; display: grid; place-items: center; border-radius: 8px; transition: .15s;
}
.icon-btn:hover { color: var(--fg); background: var(--bg-soft); }
.nav-links > a.icon-btn { padding: 5px; display: grid; place-items: center; font-size: 0; }
.nav-links > a.icon-btn:hover { color: var(--accent); background: var(--accent-soft); text-decoration: none; }

.dd { position: relative; }
.dd > button { display: flex; align-items: center; gap: 5px; }
.dd > button::after {
  content: ""; width: 4px; height: 4px; border-right: 1.2px solid currentColor;
  border-bottom: 1.2px solid currentColor; transform: rotate(45deg) translateY(-2px);
}
.dd-menu {
  position: absolute; top: calc(100% + 14px); left: 50%; transform: translateX(-50%) translateY(-4px);
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
  padding: 6px; min-width: 186px; box-shadow: 0 4px 8px rgba(16, 24, 40, .06), 0 20px 40px -16px rgba(16, 24, 40, .28);
  opacity: 0; visibility: hidden; transition: .16s var(--ease);
}
html[data-theme="dark"] .dd-menu { box-shadow: 0 4px 8px rgba(0, 0, 0, .4), 0 20px 40px -16px rgba(0, 0, 0, .7); }
.dd:hover .dd-menu, .dd:focus-within .dd-menu, .dd.open .dd-menu {
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
.dd-menu a { display: block; padding: 8px 11px; border-radius: 8px; font-size: 13.5px; color: var(--fg-soft); }
.dd-menu a:hover { background: var(--bg-soft); text-decoration: none; color: var(--fg); }
.dd-menu .dd-label {
  font-size: 11.5px; color: var(--faint); padding: 7px 11px 4px; letter-spacing: .04em;
}
.dd-menu .dd-sub { padding-left: 11px; }

@media (max-width: 760px) {
  .nav-inner { padding: 12px 20px; }
  .nav-links { gap: 14px; }
  .nav-links > a, .nav-links > .dd > button { font-size: 13px; }
  .brand-text { display: none; }
}

/* ---------- 首页首屏 ---------- */
.hero { padding: 92px 0 68px; }
.hero-kind {
  margin: 0 0 18px; font-size: 13px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent);
}
.hero h1 {
  margin: 0; font-size: clamp(2.6rem, 6.6vw, 4.2rem);
  line-height: 1.05; letter-spacing: -.035em; font-weight: 700;
}
.hero .zh { margin: 16px 0 0; font-size: 16px; color: var(--fg-soft); letter-spacing: .02em; }
.hero .lede {
  margin: 22px 0 0; max-width: 42em;
  font-size: clamp(1.02rem, 1.8vw, 1.14rem); color: var(--fg-soft); line-height: 1.78;
}
.hero-actions { margin-top: 34px; display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 11px 22px; border-radius: 10px;
  font-size: 15px; font-weight: 550; border: 1px solid var(--line); color: var(--fg); background: transparent;
  transition: transform .15s var(--ease), background .15s, border-color .15s, color .15s;
}
.btn:hover { text-decoration: none; border-color: var(--faint); transform: translateY(-1px); color: var(--fg); }
.btn-primary { background: var(--fg); border-color: var(--fg); color: var(--bg); }
.btn-primary:hover { opacity: .9; color: var(--bg); }
@media (max-width: 560px) {
  .btn { padding: 9px 16px; font-size: 14px; }
  .hero-actions { gap: 10px; }
}

/* ---------- 区块 ---------- */
.section { padding: 64px 0; }
.section-flush { padding-top: 0; }
.section-alt { background: var(--bg-soft); border-block: 1px solid var(--line); }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  margin-bottom: 30px; padding: 0; border: 0;
}
.section-head h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.7rem); margin: 0; letter-spacing: -.02em;
  display: flex; align-items: baseline; gap: 13px;
}
.section-head .num {
  font-size: 12.5px; font-weight: 700; color: var(--accent);
  letter-spacing: .04em; font-variant-numeric: tabular-nums;
}
.section-head .more { font-size: 13.5px; font-weight: 500; color: var(--fg-soft); white-space: nowrap; }
.section-head .more:hover { color: var(--accent); text-decoration: none; }

.page-head { padding: 62px 0 30px; }
.page-head h1 {
  font-size: clamp(2rem, 4.4vw, 2.6rem); margin: 0 0 10px;
  letter-spacing: -.03em; font-weight: 700; line-height: 1.15;
}
.page-head p { color: var(--fg-soft); margin: 0; font-size: 15px; max-width: 48em; }

/* ---------- 新闻列表 ---------- */
.news { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.news li {
  display: flex; gap: 22px; padding: 15px 0; border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.news .date {
  font-size: 13px; color: var(--faint); font-variant-numeric: tabular-nums; flex: 0 0 86px;
}
.news .text { font-size: 15px; color: var(--fg-soft); }
@media (max-width: 560px) {
  .news li { flex-direction: column; gap: 3px; }
  .news .date { flex: none; }
}

/* ---------- 研究方向 ---------- */
.research-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px;
  background: none; border: 0; border-radius: 0; overflow: visible;
}
.research-item {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}
.research-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.research-item h3 { font-size: 1.04rem; margin: 0 0 6px; letter-spacing: -.01em; }
.research-item .en {
  font-size: 12px; color: var(--faint); letter-spacing: .01em;
  text-transform: none; margin: 0 0 14px;
}
.research-item p:not(.en) { font-size: 14.6px; color: var(--fg-soft); margin: 0; line-height: 1.72; }

/* ---------- 成员 ---------- */
.group-title {
  font-size: 13px; font-weight: 600; letter-spacing: .06em; color: var(--faint);
  margin: 38px 0 16px; text-transform: none; display: flex; align-items: center; gap: 12px;
}
.group-title:first-child { margin-top: 0; }
.group-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.people { display: grid; grid-template-columns: repeat(auto-fill, minmax(212px, 1fr)); gap: 20px; }
.person {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 20px 24px; box-shadow: var(--shadow);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}
.person:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.avatar {
  width: 62px; height: 62px; margin: 0 0 15px; border-radius: 50%; flex: none; overflow: hidden;
  background: var(--accent-soft); color: var(--accent); display: grid; place-items: center;
  font-size: 18px; font-weight: 650; letter-spacing: -.02em;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.person h3 { font-size: 15.5px; margin: 0 0 4px; font-weight: 600; }
.person .role { font-size: 12.5px; color: var(--accent); font-weight: 550; margin: 0 0 6px; }
.person .meta { font-size: 12.5px; color: var(--faint); margin: 0; line-height: 1.6; }
.person .links { font-size: 12.5px; margin-top: 11px; display: flex; gap: 14px; justify-content: center; }
.person .links a { font-weight: 550; }

/* ---------- 论文 ---------- */
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.chip {
  font-size: 13px; padding: 6px 15px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--bg); color: var(--fg-soft); cursor: pointer; font-family: inherit;
  transition: .15s;
}
.chip:hover { border-color: var(--faint); color: var(--fg); }
.chip.on { background: var(--fg); border-color: var(--fg); color: var(--bg); }

.year-label {
  display: flex; align-items: center; gap: 14px;
  font-size: 15px; font-weight: 650; color: var(--fg); margin: 42px 0 2px;
  letter-spacing: .01em; font-variant-numeric: tabular-nums;
}
.year-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.pub { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.pub:last-child { border-bottom: 0; }
.pub-abbr {
  flex: 0 0 72px; align-self: flex-start; text-align: center;
  font-size: 11px; font-weight: 700; letter-spacing: .03em; color: var(--accent);
  background: var(--accent-soft); border-radius: 7px; padding: 4px 6px; margin-top: 2px;
  line-height: 1.45; font-variant-numeric: tabular-nums;
}
.pub-title { font-size: 15.2px; color: var(--fg); margin: 0 0 5px; font-weight: 550; line-height: 1.55; }
.pub-authors { font-size: 12.8px; color: var(--muted); margin: 0 0 6px; line-height: 1.6; }
.pub-authors b { color: var(--fg); font-weight: 650; }
.pub-venue { font-size: 12.8px; color: var(--faint); font-style: italic; margin: 0; }
.pub-links { display: flex; gap: 14px; margin-top: 9px; flex-wrap: wrap; }
.pub-links a { font-size: 12.5px; font-weight: 550; }
.award {
  display: inline-block; font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); margin-left: 8px; vertical-align: 1px;
}
@media (max-width: 620px) {
  .pub { flex-direction: column; gap: 10px; padding: 16px 0; }
  .pub-abbr { align-self: flex-start; }
}

/* ---------- Special Day ---------- */
.tabs { display: flex; gap: 8px; margin: 6px 0 10px; flex-wrap: wrap; }
.tabs + .tabs { margin-top: 10px; margin-bottom: 28px; }
.tab {
  padding: 6px 15px; border-radius: 999px; font-size: 13.5px; border: 1px solid var(--line);
  color: var(--fg-soft); background: var(--bg); cursor: pointer; font-family: inherit;
  transition: .15s;
}
.tab:hover { color: var(--fg); border-color: var(--faint); }
.tab.on { background: var(--fg); color: var(--bg); border-color: var(--fg); }

.spd-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(258px, 1fr)); gap: 20px; }
.spd {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column; background: var(--bg); box-shadow: var(--shadow);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}
.spd:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.spd-cover {
  height: 148px; background: var(--bg-soft); display: grid; place-items: center;
  color: var(--faint); font-size: 12.5px; border-bottom: 1px solid var(--line);
}
.spd-cover img { width: 100%; height: 100%; object-fit: cover; }
.spd-body { padding: 18px; }
.spd-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 7px; }
.spd h3 { font-size: 15.5px; margin: 0; font-weight: 600; }
.spd .spd-theme { font-size: 13px; color: var(--accent); font-weight: 550; margin: 0 0 6px; }
.spd .when { font-size: 12.8px; color: var(--fg-soft); margin: 0 0 3px; font-variant-numeric: tabular-nums; }
.spd .spd-place { font-size: 12.3px; color: var(--faint); margin: 0 0 8px; }
.spd .note {
  font-size: 12.3px; color: var(--faint); margin: 10px 0 0; line-height: 1.65;
  padding-top: 10px; border-top: 1px dashed var(--line);
}
.badge { font-size: 11px; font-weight: 600; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.badge-done { background: var(--pill); color: var(--muted); }
.badge-soon { background: var(--accent-soft); color: var(--accent); font-variant-numeric: tabular-nums; }
.badge-tbd { background: var(--pill); color: var(--faint); }
.spd-photos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; margin-top: 12px; }
.spd-photos img { aspect-ratio: 1; object-fit: cover; border-radius: 6px; }

/* ---------- 正文 / 其他 ---------- */
.prose h2 { font-size: 1.3rem; margin: 42px 0 12px; letter-spacing: -.015em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.05rem; margin: 26px 0 10px; }
.prose p, .prose li { color: var(--fg-soft); font-size: 15.5px; line-height: 1.78; }
.prose ul { padding-left: 22px; margin: 0 0 1rem; }
.prose li { margin-bottom: 10px; }
.prose li::marker { color: var(--faint); }
.prose strong { color: var(--fg); font-weight: 600; }
.empty { padding: 40px 0; color: var(--faint); font-size: 14px; }

.contact-box {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px;
  margin: 14px 0 0; background: var(--bg-soft);
}
.contact-box p { margin: 0 0 10px; font-size: 14.5px; color: var(--fg-soft); }
.contact-box p:last-child { margin-bottom: 0; }
.contact-box .k { color: var(--faint); font-size: 12.5px; display: inline-block; width: 76px; }

.footer { border-top: 1px solid var(--line); margin-top: 72px; padding: 34px 0 40px; }
.footer-inner {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--faint);
}
.footer a { color: var(--fg-soft); }
.footer a:hover { color: var(--accent); }

/* ---------- 后台管理 ---------- */
.admin-bar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 18px; }
.admin-bar input[type="password"] {
  flex: 1; min-width: 240px; padding: 10px 13px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg); color: var(--fg);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px;
}
.admin-note { font-size: 12.5px; color: var(--muted); }
.editor-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  padding: 16px 0; border-bottom: 1px solid var(--line); align-items: end;
}
.editor-row label { font-size: 11.5px; color: var(--faint); display: block; margin-bottom: 4px; }
.editor-row input, .editor-row select, .editor-row textarea {
  width: 100%; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--bg); color: var(--fg); font-family: inherit; font-size: 13px;
}
.editor-row input:focus, .editor-row select:focus, .editor-row textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.editor-actions { display: flex; gap: 10px; margin-top: 22px; }
.btn-sm {
  padding: 7px 14px; font-size: 13px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--bg); color: var(--fg-soft); cursor: pointer; font-family: inherit;
  font-weight: 500; transition: .15s;
}
.btn-sm:hover { border-color: var(--faint); color: var(--fg); }
.btn-danger { color: #d1382c; border-color: #f0d0cc; }
html[data-theme="dark"] .btn-danger { color: #ff8a7a; border-color: #5a2a25; }
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) .btn-danger { color: #ff8a7a; border-color: #5a2a25; }
}
.status { font-size: 13px; margin-top: 14px; }
.status.ok { color: #1a7f37; }
.status.err { color: #d1382c; }
@media (max-width: 720px) { .editor-row { grid-template-columns: 1fr 1fr; } }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero { padding: 68px 0 52px; }
  .section { padding: 52px 0; }
  .page-head { padding: 48px 0 26px; }
  .people { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}
@media (max-width: 640px) {
  .wrap, .wrap-wide { padding: 0 20px; }
  .people, .spd-grid { grid-template-columns: 1fr; }
}