/* ============================================================
   吴天昊科研团队 · Wu Tianhao Research Group
   Design system — editorial scientific (Nature/Science tone)
   ============================================================ */

:root {
  --paper: #f5f4f0;
  --paper-2: #efede7;
  --ink: #082d4f;
  --ink-deep: #051c33;
  --ink-80: rgba(8, 45, 79, .8);
  --ink-60: rgba(8, 45, 79, .6);
  --ink-30: rgba(8, 45, 79, .3);
  --ink-40: rgba(8, 45, 79, .4);
  --line: rgba(8, 45, 79, .16);
  --line-soft: rgba(8, 45, 79, .09);
  --accent: #1b6ca8;
  --accent-bright: #59b7d6;
  --paper-text: #f2f0ea;
  --paper-text-60: rgba(242, 240, 234, .62);
  --paper-text-70: rgba(242, 240, 234, .74);
  --paper-text-40: rgba(242, 240, 234, .4);
  --paper-line: rgba(242, 240, 234, .18);
  --serif: Georgia, "Times New Roman", "Noto Serif SC", "Noto Serif CJK SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", SFMono-Regular, ui-monospace, Menlo, Consolas, "Liberation Mono", monospace;
  --ease: cubic-bezier(.25, 1, .5, 1);
  --max: 1280px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 纸面颗粒噪点 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2000;
  opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--accent); color: #fff; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ---------- 绘图台式竖向基准线 ---------- */
.guides {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  display: flex;
  justify-content: space-evenly;
}
.guides span {
  width: .5px;
  background: var(--line-soft);
}
.guides.on-dark span { background: rgba(242, 240, 234, .07); }

/* ---------- 通用容器 ---------- */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 56px);
  position: relative;
  z-index: 2;
}

/* ---------- 页头 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background .5s var(--ease), box-shadow .5s var(--ease), border-color .5s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header .bar {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 56px);
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
/* 2026-09 批注改版：允许品牌区收缩，配合 Logo 图最大宽度限制，长 Logo 不再挤压导航 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
  min-width: 0;
  flex: 0 1 auto;
  overflow: hidden;
}
.brand .cn {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .06em;
}
.brand .en {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  opacity: .55;
}
/* Logo：加粗大号 Wu Lab */
.brand .brand-name {
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1;
}
/* 文字 Logo 右侧的长方形 Logo 图（与文字之间用 "|" 隔开） */
.brand .brand-sep { font-weight: 300; font-size: 24px; opacity: .35; line-height: 1; }
/* 长方形 Logo 图：宽度自适应比例，但封顶 max-width——过长的 Logo 自动等比缩小，不挤压导航。
   2026-09：用户 Logo 为白字，衬板由白色改为科技感银灰渐变（深色透明页眉 / 浅色实心页眉下均清晰） */
.brand .brand-logo {
  height: 38px;
  width: auto;
  max-width: clamp(120px, 15vw, 200px);
  display: block;
  padding: 3px 8px;
  background: linear-gradient(135deg, #d8dde3 0%, #adb5be 55%, #8f98a3 100%);
  border: 1px solid rgba(8,45,79,.22);
  border-radius: 6px;
  object-fit: contain;
  box-sizing: content-box;
  flex: 0 1 auto;
  min-width: 0;
}
/* 语言切换器 */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 18px;
  padding-left: 18px;
  border-left: 1px solid rgba(245,244,240,.25);
}
.site-header.solid .lang-switch { border-left-color: rgba(8,45,79,.15); }
.lang-switch .sep { opacity: .4; font-size: 14px; }
.lang-switch button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .12em;
  padding: 4px 2px;
  color: inherit;
  opacity: .55;
  transition: opacity .2s;
}
.lang-switch button:hover { opacity: .9; }
.lang-switch button.on { opacity: 1; font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }

/* 研究方向横向滚动卡片 */
/* 2026-09 批注改版：滚动条加粗加亮（轨道常驻、滑块用主题色），并配套箭头/序号（.dir-nav，见 render.js） */
.dir-head-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 28px; flex-wrap: wrap; }
.dir-head-row .sec-head { flex: 1 1 520px; }
.dir-nav { display: flex; align-items: center; gap: 12px; padding-bottom: 8px; }
.dir-count { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; opacity: .7; margin-right: 2px; }
.dir-count .cur { font-weight: 700; opacity: 1; }
.dir-btn {
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid rgba(8,45,79,.28); background: transparent; color: inherit;
  display: grid; place-items: center; cursor: pointer;
  opacity: .8;
  transition: border-color .25s, color .25s, opacity .25s;
}
.dir-btn:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }
.dir-btn.off { opacity: .22; pointer-events: none; }
.section.dark .dir-btn { border-color: rgba(245,244,240,.32); }
.section.dark .dir-btn:hover { border-color: var(--accent-bright); color: var(--accent-bright); }
.dir-rail {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 4px 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) rgba(8,45,79,.12);
}
.dir-rail::-webkit-scrollbar { height: 8px; }
.dir-rail::-webkit-scrollbar-track { background: rgba(8,45,79,.1); border-radius: 4px; }
.dir-rail::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }
.dir-rail::-webkit-scrollbar-thumb:hover { background: var(--accent-bright); }
.section.dark .dir-rail { scrollbar-color: var(--accent-bright) rgba(245,244,240,.14); }
.section.dark .dir-rail::-webkit-scrollbar-track { background: rgba(245,244,240,.14); }
.section.dark .dir-rail::-webkit-scrollbar-thumb { background: var(--accent-bright); }
.dir-card {
  scroll-snap-align: start;
  flex: 0 0 360px;
  display: flex;
  flex-direction: column;
  background: rgba(245,244,240,.04);
  border: 1px solid rgba(245,244,240,.14);
  text-decoration: none;
  color: inherit;
  transition: transform .45s cubic-bezier(.25,1,.5,1), border-color .45s;
}
.dir-card:hover { transform: translateY(-6px); border-color: rgba(89,183,214,.6); }
.section:not(.dark) .dir-card {
  background: #fff;
  border-color: rgba(8,45,79,.12);
}
.dir-card .fig {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.dir-card .fig img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .8s cubic-bezier(.25,1,.5,1);
}
.dir-card:hover .fig img { transform: scale(1.05); }
.dir-card .dir-no {
  position: absolute;
  top: 12px; left: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  padding: 5px 10px;
  background: rgba(5,28,51,.78);
  color: #f5f4f0;
}
.dir-card .body { padding: 22px 22px 26px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.dir-card h3 {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.3;
}
.dir-card h3 .en {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .2em;
  text-transform: uppercase;
  opacity: .55;
  margin-top: 6px;
}
.dir-card .body > p {
  font-size: 13.5px;
  line-height: 1.85;
  opacity: .78;
}
.dir-card .tag-row { margin-top: auto; }
.dir-more {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: #59b7d6;
  margin-top: 6px;
}
.section:not(.dark) .dir-more { color: #1b6ca8; }

/* 研究页方向：纵向整页排版（2026-09 批注改版，替代横向滑动内容框）
   整条页面上下拖动浏览；图片与文字左右交替，锚点 dir-i 保留 */
/* 2026-09 批注改版：图片下方不放文字（图注不渲染），行距收紧、留白减少 */
.dir-rows { display: flex; flex-direction: column; gap: clamp(40px, 5vw, 64px); }
.dir-row {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(28px, 4vw, 72px);
  align-items: center;
}
.dir-row:nth-child(even) { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }
.dir-row:nth-child(even) .fig { order: 2; }
.dir-row .fig { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.dir-row .fig img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .8s cubic-bezier(.25,1,.5,1);
}
.dir-row:hover .fig img { transform: scale(1.04); }
.dir-row .dir-no {
  position: absolute;
  top: 14px; left: 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  padding: 6px 12px;
  background: rgba(5,28,51,.78);
  color: #f5f4f0;
}
.dir-row .body { display: flex; flex-direction: column; gap: 18px; }
.dir-row h3 {
  font-family: var(--serif);
  font-size: clamp(26px, 2.8vw, 38px);
  font-weight: 700;
  line-height: 1.25;
}
.dir-row h3 .en {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .2em;
  text-transform: uppercase;
  opacity: .55;
  margin-top: 10px;
}
.dir-row .body > p {
  font-size: 15.5px;
  line-height: 1.9;
  opacity: .8;
  max-width: 42em;
}
.dir-row .tag-row { margin-top: 4px; }
@media (max-width: 860px) {
  .dir-row, .dir-row:nth-child(even) { grid-template-columns: 1fr; gap: 20px; }
  .dir-row:nth-child(even) .fig { order: 0; }
  .dir-row .body > p { font-size: 14.5px; }
}
@media (max-width: 768px) {
  .dir-card { flex-basis: 78vw; }
  .lang-switch { margin-left: 10px; padding-left: 10px; }
}
/* 窄屏时隐藏页眉英文副标题，避免与折叠按钮拥挤 */
@media (max-width: 560px) {
  .brand .en { display: none; }
}

/* 论文页：年份分组 + 筛选 */
.pub-filter { margin: 0 0 34px; }
.pub-filter input {
  width: 100%;
  max-width: 520px;
  padding: 13px 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: #082d4f;
  background: #fff;
  border: 1px solid rgba(8,45,79,.2);
  border-radius: 0;
  outline: none;
  transition: border-color .2s;
}
.pub-filter input:focus { border-color: #1b6ca8; }
/* 2026-09 批注改版：导航字号微调（20→18px），栏间距收紧，为品牌区 Logo 预留空间 */
.main-nav { display: flex; align-items: center; gap: clamp(12px, 1.6vw, 26px); flex-shrink: 0; }
.main-nav a {
  font-size: 18px;
  letter-spacing: .04em;
  padding: 6px 0;
  position: relative;
  opacity: .78;
  transition: opacity .3s var(--ease);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s var(--ease);
}
.main-nav a:hover, .main-nav a.active { opacity: 1; }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }

/* 页头两种状态 */
.site-header { color: var(--paper-text); }
.site-header.solid {
  background: rgba(245, 244, 240, .92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: var(--ink);
  border-bottom-color: var(--line-soft);
}
.site-header.on-light { color: var(--ink); }
.site-header.on-light.solid { background: rgba(245,244,240,.92); }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  width: 40px; height: 40px;
  position: relative;
  z-index: 110;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: currentColor;
  margin: 5px auto;
  transition: transform .4s var(--ease), opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* 2026-09 批注改版：导航字号加大后，1200px 以下改用折叠菜单，避免拥挤换行 */
@media (max-width: 1200px) {
  .nav-toggle { display: block; color: inherit; }
  .main-nav {
    position: fixed;
    inset: 0;
    background: var(--ink-deep);
    color: var(--paper-text);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 26px;
    font-size: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .45s var(--ease);
    z-index: 105;
  }
  .main-nav.open { opacity: 1; pointer-events: auto; }
  .main-nav a { font-size: 20px; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 96vh;
  display: flex;
  align-items: center;
  background: var(--ink-deep);
  color: var(--paper-text);
  overflow: hidden;
}
.hero-media, .hero-canvas {
  position: absolute;
  inset: 0;
}
.hero-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .55;
  transform: scale(1.06);
}
.hero-canvas { z-index: 1; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(to top, var(--ink-deep) 0%, rgba(5, 28, 51, .55) 34%, rgba(5, 28, 51, .25) 60%, rgba(5, 28, 51, .45) 100%);
}
.hero-inner {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(110px, 15vh, 170px) clamp(24px, 6vw, 72px) clamp(90px, 13vh, 150px);
}
.hero-kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--accent-bright);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}
.hero-kicker::before {
  content: "";
  width: 44px; height: 1px;
  background: var(--accent-bright);
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(36px, 5.6vw, 76px);
  line-height: 1.14;
  letter-spacing: .015em;
  max-width: 15em;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent-bright);
}
.hero-sub {
  margin-top: 30px;
  max-width: 620px;
  font-size: clamp(15px, 1.35vw, 17px);
  color: var(--paper-text-70);
  line-height: 1.9;
}
.hero-stats {
  margin-top: clamp(48px, 7vh, 90px);
  border-top: 1px solid var(--paper-line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.hero-stats .stat {
  padding: 26px 24px 40px 0;
  border-right: 1px solid var(--paper-line);
}
.hero-stats .stat:last-child { border-right: 0; }
.hero-stats .num {
  font-family: var(--serif);
  font-size: clamp(30px, 3.6vw, 52px);
  line-height: 1.1;
}
.hero-stats .num sup { font-size: .5em; color: var(--accent-bright); }
.hero-stats .lbl {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--paper-text-40);
}
@media (max-width: 760px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats .stat:nth-child(2) { border-right: 0; }
}

.scroll-hint {
  position: absolute;
  right: clamp(20px, 5vw, 56px);
  bottom: 0;
  z-index: 3;
  width: 1px;
  height: 15vh;
  background: var(--paper-line);
  overflow: hidden;
}
.scroll-hint::after {
  content: "";
  position: absolute;
  left: 0; top: -40%;
  width: 100%; height: 40%;
  background: var(--accent-bright);
  animation: hint 2.4s var(--ease) infinite;
}
@keyframes hint {
  0% { top: -40%; }
  60%, 100% { top: 110%; }
}

/* ---------- 区块基础 ---------- */
.section { padding: clamp(80px, 11vw, 150px) 0; position: relative; }
.section.dark { background: var(--ink-deep); color: var(--paper-text); }
.section.tinted { background: var(--paper-2); }

.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(24px, 5vw, 80px);
  align-items: end;
  margin-bottom: clamp(48px, 6vw, 88px);
}
@media (max-width: 860px) { .sec-head { grid-template-columns: 1fr; } }
/* 2026-09 批注改版：栏目头右侧说明小字停显后，标题通栏单排 */
.sec-head.no-desc { grid-template-columns: 1fr; }

/* 2026-09 批注改版：栏目标签（如 01 / OUR MISSION）字号放大一倍 11px→22px */
.sec-label {
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: .14em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--accent);
  margin-bottom: 18px;
}
.section.dark .sec-label { color: var(--accent-bright); }
.sec-label .idx {
  border: 1.5px solid currentColor;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
}
.sec-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 56px);
  line-height: 1.18;
  letter-spacing: .01em;
}
.sec-title em { font-style: normal; color: var(--accent); }
.section.dark .sec-title em { color: var(--accent-bright); }
.sec-desc {
  font-size: 15.5px;
  color: var(--ink-60);
  max-width: 46em;
}
.section.dark .sec-desc { color: var(--paper-text-60); }

/* ---------- 宣言 ---------- */
/* 2026-09 批注改版：右侧说明小字删除后，宣言段落重新排版、加宽通栏 */
.manifesto p {
  font-family: var(--serif);
  font-size: clamp(21px, 2.8vw, 34px);
  line-height: 1.75;
  max-width: 36em;
}
.manifesto p + p { margin-top: 1.4em; }
.manifesto .lead-word {
  color: var(--accent);
}
.section.dark .manifesto .lead-word { color: var(--accent-bright); }
.dropcap::first-letter {
  font-family: var(--serif);
  float: left;
  font-size: 3.2em;
  line-height: .86;
  padding: .08em .12em 0 0;
  color: var(--accent);
}
.section.dark .dropcap::first-letter { color: var(--accent-bright); }

/* ---------- 研究方向卡 ---------- */
.dir-list { border-top: 1px solid var(--line); }
.dark .dir-list { border-color: var(--paper-line); }
.dir-item {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr) minmax(0, 1.4fr) 40px;
  gap: clamp(18px, 4vw, 64px);
  align-items: center;
  padding: clamp(26px, 3.4vw, 44px) 0;
  border-bottom: 1px solid var(--line);
  transition: padding .5s var(--ease);
  position: relative;
}
.dark .dir-item { border-color: var(--paper-line); }
.dir-item:hover { padding-left: clamp(8px, 1.4vw, 20px); }
.dir-no {
  font-family: var(--serif);
  font-size: clamp(24px, 2.6vw, 38px);
  color: var(--ink-40);
}
.dark .dir-no { color: var(--paper-text-40); }
.dir-name { font-family: var(--serif); font-size: clamp(20px, 2.4vw, 30px); font-weight: 700; line-height: 1.3; }
.dir-name .en {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 8px;
}
.dark .dir-name .en { color: var(--accent-bright); }
.dir-brief { font-size: 14.5px; color: var(--ink-60); }
.dark .dir-brief { color: var(--paper-text-60); }
.dir-arrow {
  width: 34px; height: 34px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: background .4s var(--ease), border-color .4s var(--ease), transform .4s var(--ease);
}
.dark .dir-arrow { border-color: var(--paper-line); }
.dir-item:hover .dir-arrow {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: rotate(-45deg);
}
@media (max-width: 760px) {
  .dir-item { grid-template-columns: 56px 1fr 36px; }
  .dir-brief { display: none; }
}

/* ---------- 图文交错 ---------- */
.feature {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(16px, 3vw, 40px);
  align-items: center;
  padding: clamp(40px, 6vw, 84px) 0;
  border-top: 1px solid var(--line);
}
.dark .feature { border-color: var(--paper-line); }
.feature .fig { grid-column: span 7; position: relative; }
.feature.flip .fig { order: 2; }
.feature .txt { grid-column: span 5; }
.feature.flip .txt { order: 1; }
@media (max-width: 860px) {
  .feature .fig, .feature .txt { grid-column: 1 / -1; }
  .feature.flip .fig { order: 0; }
}
.framed {
  border: 1px solid var(--line);
  padding: 10px;
  background: rgba(255,255,255,.35);
}
.dark .framed { border-color: var(--paper-line); background: rgba(242,240,234,.03); }
.framed img { width: 100%; height: auto; }
.fig-cap {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-40);
  margin-top: 12px;
  display: flex;
  gap: 12px;
  align-items: center;
}
.dark .fig-cap { color: var(--paper-text-40); }
.fig-cap::before { content: ""; width: 28px; height: 1px; background: currentColor; }
.feature .kicker {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}
.dark .feature .kicker { color: var(--accent-bright); }
.feature h3 {
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
}
.feature p { font-size: 15px; color: var(--ink-60); }
.dark .feature p { color: var(--paper-text-60); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-60);
}
.dark .tag { border-color: var(--paper-line); color: var(--paper-text-60); }

/* ---------- 新闻时间线 ---------- */
.news-list { border-top: 1px solid var(--line); }
.news-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) auto;
  gap: clamp(16px, 3.5vw, 56px);
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  transition: padding .45s var(--ease);
}
.news-item:hover { padding-left: 12px; }
.news-date { text-align: left; }
.news-date .d { font-family: var(--serif); font-size: clamp(30px, 3.2vw, 44px); line-height: 1; }
.news-date .m {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-40);
  margin-top: 6px;
  display: block;
}
.news-tag {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 3px 10px;
  border-radius: 999px;
  display: inline-block;
  margin-bottom: 10px;
}
.news-title { font-size: clamp(15px, 1.6vw, 18px); font-weight: 600; line-height: 1.6; }
.news-title .hl { color: var(--accent); }
.news-go {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink-40);
  white-space: nowrap;
  transition: color .3s;
}
.news-item:hover .news-go { color: var(--accent); }
@media (max-width: 640px) {
  .news-item { grid-template-columns: 76px 1fr; }
  .news-go { display: none; }
}

/* ---------- 新闻详情页（news-post.html，2026-09 批注新增） ---------- */
.news-article-section { padding-top: clamp(40px, 6vw, 72px); }
.news-back {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--accent);
  text-decoration: none;
  margin-bottom: clamp(30px, 4vw, 46px);
  transition: opacity .25s;
}
.news-back:hover { text-decoration: underline; text-underline-offset: 4px; }
.news-article { max-width: 800px; margin: 0 auto; }
.news-article-meta { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.news-article-date { font-family: var(--mono); font-size: 12px; letter-spacing: .12em; color: var(--ink-40); }
.news-article-title {
  font-family: var(--serif);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 14px;
}
.news-article-author { font-size: 13.5px; color: var(--ink-60); margin-bottom: 10px; }
.news-article-fig { margin: 30px 0; border-radius: 14px; overflow: hidden; }
.news-article-fig img { width: 100%; display: block; }
.news-article-fig figcaption { font-size: 12.5px; color: var(--ink-40); padding: 12px 4px 0; }
.news-article-body { font-size: 15.5px; line-height: 2; color: rgba(8,45,79,.88); }
.news-article-body p { margin: 0 0 1.2em; }
.news-article-body p:last-child { margin-bottom: 0; }
.news-coming { font-family: var(--serif); font-style: italic; color: var(--ink-40) !important; }
.news-404 { text-align: center; padding: clamp(50px, 8vw, 90px) 0; }
.news-404 .serif { font-family: var(--serif); font-size: clamp(22px, 3vw, 30px); font-weight: 700; margin-bottom: 14px; }
.news-404 p { color: var(--ink-60); margin-bottom: 26px; }
@media (max-width: 640px) {
  .news-article-body { font-size: 15px; }
}

/* ---------- 项目表 ---------- */
.proj-group { margin-bottom: clamp(48px, 6vw, 80px); }
.proj-group-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 14px;
  margin-bottom: 8px;
}
.dark .proj-group-head { border-color: var(--paper-text); }
.proj-group-head .cn { font-family: var(--serif); font-size: clamp(20px, 2.4vw, 28px); font-weight: 700; }
.proj-group-head .en {
  font-family: var(--mono); font-size: 10px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--ink-40);
}
.dark .proj-group-head .en { color: var(--paper-text-40); }
.proj-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1.6fr) minmax(0, 1fr) 130px 90px;
  gap: clamp(14px, 3vw, 40px);
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  transition: background .3s var(--ease);
}
.proj-row:hover { background: rgba(8, 45, 79, .035); }
.dark .proj-row { border-color: var(--paper-line); }
.dark .proj-row:hover { background: rgba(242, 240, 234, .04); }
.proj-row .no { font-family: var(--mono); font-size: 11px; color: var(--ink-40); }
.dark .proj-row .no { color: var(--paper-text-40); }
.proj-row .name { font-weight: 600; line-height: 1.6; }
.proj-row .role { color: var(--ink-60); font-size: 13.5px; }
.dark .proj-row .role { color: var(--paper-text-60); }
.proj-row .period { font-family: var(--mono); font-size: 12px; color: var(--ink-60); }
.dark .proj-row .period { color: var(--paper-text-60); }
.proj-status {
  font-family: var(--mono); font-size: 10px; letter-spacing: .16em; text-transform: uppercase;
  text-align: center; padding: 4px 0; border-radius: 999px;
}
.proj-status.on { color: #1d7a4f; border: 1px solid #1d7a4f; }
.proj-status.done { color: var(--ink-40); border: 1px solid var(--ink-40); }
.dark .proj-status.on { color: #6fc7a0; border-color: #6fc7a0; }
.dark .proj-status.done { color: var(--paper-text-40); border-color: var(--paper-text-40); }
@media (max-width: 760px) {
  .proj-row { grid-template-columns: 34px 1fr 80px; }
  .proj-row .role, .proj-row .period { display: none; }
}

/* ---------- 平台卡 ---------- */
.plat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(20px, 3vw, 44px);
}
@media (max-width: 820px) { .plat-grid { grid-template-columns: 1fr; } }
.plat-card { border: 1px solid var(--line); background: rgba(255,255,255,.4); display: flex; flex-direction: column; }
.dark .plat-card { border-color: var(--paper-line); background: rgba(242,240,234,.03); }
.plat-card .fig { overflow: hidden; }
.plat-card .fig img { width: 100%; height: 280px; object-fit: cover; transition: transform 1.2s var(--ease), filter .8s var(--ease); filter: grayscale(.35); }
.plat-card:hover .fig img { transform: scale(1.045); filter: grayscale(0); }
.plat-card .body { padding: clamp(22px, 3vw, 36px); border-top: 1px solid var(--line); flex: 1; }
.dark .plat-card .body { border-color: var(--paper-line); }
.plat-card .no { font-family: var(--mono); font-size: 10px; letter-spacing: .24em; color: var(--accent); text-transform: uppercase; }
.dark .plat-card .no { color: var(--accent-bright); }
.plat-card h3 { font-family: var(--serif); font-size: clamp(20px, 2.2vw, 27px); font-weight: 700; margin: 12px 0 10px; }
.plat-card p { font-size: 14px; color: var(--ink-60); }
.dark .plat-card p { color: var(--paper-text-60); }
.spec-list { list-style: none; margin-top: 18px; border-top: 1px solid var(--line-soft); }
.dark .spec-list { border-color: rgba(242,240,234,.1); }
.spec-list li {
  display: flex; justify-content: space-between; gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
}
.dark .spec-list li { border-color: rgba(242,240,234,.1); }
.spec-list li b { font-weight: 500; color: var(--ink-80); }
.dark .spec-list li b { color: var(--paper-text); }
.spec-list li span { color: var(--ink-40); font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-align: right; }
.dark .spec-list li span { color: var(--paper-text-40); }

/* ---------- 成员 ---------- */
.pi-block {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(20px, 4vw, 64px);
  align-items: start;
}
.pi-card { grid-column: span 4; position: sticky; top: 110px; }
.pi-info { grid-column: span 8; }
@media (max-width: 900px) {
  .pi-card, .pi-info { grid-column: 1 / -1; }
  .pi-card { position: static; }
}
.pi-portrait {
  border: 1px solid var(--line);
  padding: 12px;
  background: rgba(255,255,255,.4);
}
.pi-portrait .ph img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.pi-portrait .ph {
  aspect-ratio: 4 / 4.6;
  background:
    radial-gradient(circle at 30% 22%, rgba(89,183,214,.35), transparent 55%),
    linear-gradient(160deg, #0d3a63, var(--ink-deep));
  display: grid;
  place-items: center;
}
.pi-portrait .ph span {
  font-family: var(--serif);
  font-size: clamp(44px, 5vw, 68px);
  color: rgba(242, 240, 234, .9);
  letter-spacing: .04em;
}
.pi-info h3 { font-family: var(--serif); font-size: clamp(28px, 3.4vw, 44px); font-weight: 700; line-height: 1.25; }
.pi-info .role {
  font-family: var(--mono); font-size: 11px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--accent); margin: 14px 0 26px;
}
.pi-info p { color: var(--ink-60); font-size: 15px; }
.pi-info p + p { margin-top: 1em; }
.pi-facts { margin-top: 30px; border-top: 1px solid var(--line); }
.pi-facts div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}
.pi-facts dt { font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-40); padding-top: 4px; }
.pi-facts dd { color: var(--ink-80); }

.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(196px, 1fr));
  gap: clamp(14px, 1.8vw, 22px);
}
.member-card {
  background: #fff;
  border: 1px solid var(--line);
  padding: 26px 18px 24px;
  text-align: center;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.member-card:hover { border-color: rgba(8,45,79,.35); transform: translateY(-3px); }
.member-card .avatar {
  width: 86px; height: 86px;
  border-radius: 50%;
  background: linear-gradient(150deg, #124a7d, var(--ink-deep));
  color: rgba(242,240,234,.95);
  display: grid; place-items: center;
  font-family: var(--serif);
  font-size: 32px;
  margin: 0 auto 16px;
  border: 1px solid rgba(8,45,79,.2);
  overflow: hidden;
}
.member-card .avatar img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.member-card .name { font-family: var(--serif); font-size: 16.5px; font-weight: 700; }
/* 2026-09 批注改版：成员信息按行拆分（职务或课题 / 年份单独一行 / 学位 | 学校），小字统一 mono 风格 */
.member-card .m-info {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .02em;
  color: var(--ink-60);
  margin-top: 6px;
  line-height: 1.55;
}
.member-card .m-info:empty { display: none; }
.member-group-label {
  display: flex; align-items: center; gap: 16px;
  margin: clamp(40px, 5vw, 64px) 0 22px;
}
.member-group-label h3 { font-family: var(--serif); font-size: clamp(20px, 2.4vw, 28px); font-weight: 700; }
.member-group-label .cnt { font-family: var(--mono); font-size: 10px; letter-spacing: .2em; color: var(--accent); text-transform: uppercase; }
.member-group-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* ---------- 活动画廊 ---------- */
.act-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(18px, 2.6vw, 36px);
}
.act-item { position: relative; }
.act-item.tall { grid-column: span 5; }
.act-item.wide { grid-column: span 7; }
@media (max-width: 760px) { .act-item.tall, .act-item.wide { grid-column: 1 / -1; } }
.act-item .fig { overflow: hidden; border: 1px solid var(--line); padding: 8px; background: rgba(255,255,255,.35); }
.act-item .fig img { width: 100%; height: 320px; object-fit: cover; filter: grayscale(.3); transition: filter .8s var(--ease), transform 1.2s var(--ease); }
.act-item:hover .fig img { filter: grayscale(0); transform: scale(1.04); }
.act-item .meta { padding: 16px 4px 0; }
.act-item .meta .date { font-family: var(--mono); font-size: 10px; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.act-item .meta h3 { font-family: var(--serif); font-size: 20px; font-weight: 700; margin-top: 8px; line-height: 1.45; }
.act-item .meta p { font-size: 13.5px; color: var(--ink-60); margin-top: 8px; }

/* ---------- 加入我们 ---------- */
.join-hero {
  border: 1px solid var(--paper-line);
  padding: clamp(36px, 6vw, 80px);
  background: rgba(242,240,234,.04);
  position: relative;
}
.join-hero .big {
  font-family: var(--serif);
  font-size: clamp(26px, 3.6vw, 46px);
  font-weight: 700;
  line-height: 1.5;
  max-width: 22em;
}
/* 2026-09 批注改版：在招岗位合并为一段介绍文字（原分条列表样式 .pos-list/.pos-item 停用保留） */
.pos-intro {
  font-family: var(--serif);
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 2.0;
  max-width: 62em;
  color: var(--ink);
}
.pos-list { border-top: 1px solid var(--line); margin-top: 24px; }
.pos-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) 150px;
  gap: clamp(16px, 3.5vw, 56px);
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.pos-item h3 { font-family: var(--serif); font-size: clamp(19px, 2.2vw, 26px); font-weight: 700; }
.pos-item h3 .en { display: block; font-family: var(--mono); font-size: 9.5px; font-weight: 400; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin-top: 6px; }
.pos-item .req { font-size: 13.5px; color: var(--ink-60); }
.pos-item .mail {
  font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  border: 1px solid var(--ink); padding: 10px 0; text-align: center;
  transition: background .35s var(--ease), color .35s var(--ease);
}
.pos-item .mail:hover { background: var(--ink); color: var(--paper-text); }
@media (max-width: 700px) { .pos-item { grid-template-columns: 1fr; } }

.contact-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--paper-line);
  border: 1px solid var(--paper-line);
}
.contact-panel .cell { background: var(--ink-deep); padding: clamp(24px, 3vw, 40px); }
.contact-panel .k { font-family: var(--mono); font-size: 10px; letter-spacing: .22em; text-transform: uppercase; color: var(--accent-bright); margin-bottom: 14px; }
.contact-panel .v { font-size: 15px; line-height: 1.9; color: var(--paper-text); }
.contact-panel .v small { display: block; color: var(--paper-text-40); font-size: 12px; }

/* ---------- 引用 ---------- */
.bigquote {
  max-width: 26em;
  margin: 0 auto;
  text-align: center;
}
.bigquote blockquote {
  font-family: var(--serif);
  font-size: clamp(24px, 3.4vw, 42px);
  line-height: 1.6;
  font-weight: 700;
}
.bigquote blockquote::before { content: "“"; color: var(--accent-bright); }
.bigquote blockquote::after { content: "”"; color: var(--accent-bright); }
.bigquote cite {
  display: block;
  margin-top: 26px;
  font-style: normal;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--paper-text-40);
}

/* ---------- CTA 横幅 ---------- */
.cta-band { text-align: center; }
.cta-band .serif {
  font-family: var(--serif);
  font-size: clamp(28px, 4.6vw, 58px);
  font-weight: 700;
  line-height: 1.35;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 40px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  padding: 18px 38px;
  border: 1px solid currentColor;
  transition: background .4s var(--ease), color .4s var(--ease), letter-spacing .4s var(--ease);
}
.btn:hover { background: var(--accent-bright); border-color: var(--accent-bright); color: var(--ink-deep); letter-spacing: .3em; }
.btn.dark-btn:hover { background: var(--ink); border-color: var(--ink); color: var(--paper-text); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--ink-deep);
  color: var(--paper-text);
  /* 2026-09 批注修正：与底色同色的上边框消除深色区块接缝处的 1px 亮线；
     顶部留白加大，避免页脚文字贴齐上沿（与成员页等页脚保持一致观感） */
  border-top: 1px solid var(--ink-deep);
  padding: clamp(70px, 9vw, 130px) 0 0;
  position: relative;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: clamp(28px, 5vw, 80px);
  padding-bottom: clamp(48px, 6vw, 80px);
  border-bottom: 1px solid var(--paper-line);
}
@media (max-width: 800px) { .foot-grid { grid-template-columns: 1fr; } }
.foot-brand .cn { font-family: var(--serif); font-size: 26px; font-weight: 700; letter-spacing: .04em; }
.foot-brand .en { font-family: var(--mono); font-size: 10px; letter-spacing: .26em; text-transform: uppercase; color: var(--paper-text-40); margin-top: 10px; display: block; }
.foot-brand p { margin-top: 22px; font-size: 13.5px; color: var(--paper-text-60); max-width: 30em; }
.foot-col h4 {
  font-family: var(--mono); font-size: 10px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--paper-text-40); margin-bottom: 20px; font-weight: 400;
}
.foot-col a, .foot-col span { display: block; font-size: 14px; color: var(--paper-text-60); padding: 5px 0; transition: color .3s; }
.foot-col a:hover { color: var(--accent-bright); }
.foot-word {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(56px, 12.5vw, 180px);
  line-height: 1.05;
  text-align: center;
  letter-spacing: .02em;
  padding: clamp(30px, 5vw, 60px) 0 0;
  color: transparent;
  -webkit-text-stroke: 1px rgba(242, 240, 234, .28);
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
}
.foot-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 22px 0 30px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em;
  color: var(--paper-text-40);
}

/* ---------- 页面子 Hero ---------- */
.page-hero {
  background: var(--ink-deep);
  color: var(--paper-text);
  padding: 180px 0 clamp(60px, 8vw, 100px);
  position: relative;
  overflow: hidden;
}
.page-hero .hero-canvas { opacity: .5; }
.page-hero .crumb {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .26em; text-transform: uppercase;
  color: var(--accent-bright); display: flex; align-items: center; gap: 14px; margin-bottom: 26px;
}
.page-hero .crumb::before { content: ""; width: 36px; height: 1px; background: var(--accent-bright); }
.page-hero h1 {
  font-family: var(--serif);
  font-size: clamp(38px, 6vw, 76px);
  font-weight: 700;
  line-height: 1.12;
}
.page-hero h1 .en {
  display: block;
  font-family: var(--mono);
  font-size: clamp(10px, 1vw, 13px);
  font-weight: 400;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--paper-text-40);
  margin-top: 18px;
}
.page-hero .lede { margin-top: 26px; max-width: 44em; color: var(--paper-text-60); font-size: 15.5px; }

/* ---------- 论文列表：状态标注 + 行内链接 ---------- */
.pub-list { border-top: 1px solid var(--line); }
.pub-item {
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}
.pub-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 7px; }
.pub-badge {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  padding: 3px 9px;
  border: 1px solid;
}
.pub-badge.review { color: #b5641a; border-color: rgba(181,100,26,.45); background: rgba(181,100,26,.08); }
.pub-badge.published { color: var(--accent); border-color: rgba(27,108,168,.4); background: rgba(27,108,168,.07); }
.pub-date { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--ink-40); }
.pub-item .venue {
  font-family: var(--mono); font-size: 10px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--accent);
}
.pub-item .t { font-weight: 600; font-size: 15px; line-height: 1.6; }
/* 2026-09 批注改版：论文标题即链接（有 pdf 链接时） */
.pub-item .t a { color: inherit; text-decoration: none; background: linear-gradient(var(--accent), var(--accent)) left bottom / 0% 1.5px no-repeat; transition: background-size .3s cubic-bezier(.25,1,.5,1), color .2s; }
.pub-item .t a:hover { color: var(--accent); background-size: 100% 1.5px; }
.pub-item .a { font-size: 13px; color: var(--ink-60); margin-top: 4px; }
.pub-links {
  margin-top: 9px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-40);
  word-spacing: 2px;
}
.pub-links a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; transition: color .2s; }
.pub-links a:hover { color: var(--ink); }
.pub-links .off { color: var(--ink-30); }

/* ---------- 动态加载状态 ---------- */
.page-loading {
  position: fixed;
  inset: 0;
  z-index: 3000;
  background: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  color: var(--ink);
}
.page-loading .spin {
  width: 34px; height: 34px;
  border: 1.5px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: loadspin .9s linear infinite;
}
@keyframes loadspin { to { transform: rotate(360deg); } }
.page-loading p {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--ink-40);
}

/* ---------- 揭示动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}