/* =====================================================================
   PMRS Lab — 统一设计系统 (Design System)
   行星制图与遥感实验室 · 全站唯一样式来源 (single source of truth)
   所有页面只需 <link rel="stylesheet" href="assets/site.css">
   改这一处 = 改全站。
   ===================================================================== */

/* ---------- 1. 设计令牌 Design Tokens ---------- */
:root {
  /* 品牌色 —— 深空蓝 + 行星暖橙点缀 */
  --brand:        #0b3d73;   /* 主品牌色（页头/重点） */
  --brand-deep:   #072746;   /* 更深的导航底色 */
  --brand-soft:   #e8f0fa;   /* 浅色品牌背景 */
  --accent:       #2f7de1;   /* 链接/交互蓝 */
  --accent-2:     #d6633f;   /* 火星暖橙（少量点缀） */

  /* 中性色 */
  --bg:        #ffffff;
  --surface:   #f5f7fb;      /* 卡片/分区底 */
  --surface-2: #eaeff7;
  --border:    #e2e8f1;
  --text:      #16202e;
  --muted:     #5a6677;
  --white:     #ffffff;

  /* 字体 —— 优先系统中文黑体，无需联网字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
               "Noto Sans SC", system-ui, -apple-system, "Segoe UI",
               Roboto, Helvetica, Arial, sans-serif;
  --font-serif: "Times New Roman", Times, Georgia, "Songti SC", serif;

  /* 流式字号 (clamp: 手机→桌面自适应) */
  --fs-hero:  clamp(1.9rem, 1.2rem + 2.6vw, 3rem);
  --fs-h1:    clamp(1.6rem, 1.1rem + 1.6vw, 2.2rem);
  --fs-h2:    clamp(1.3rem, 1.05rem + 0.9vw, 1.7rem);
  --fs-h3:    1.15rem;
  --fs-body:  1rem;
  --fs-sm:    0.875rem;

  /* 间距 / 圆角 / 阴影 */
  --space:    1rem;
  --radius:   12px;
  --radius-sm: 8px;
  --shadow:   0 1px 2px rgba(16,32,46,.06), 0 8px 24px rgba(16,32,46,.08);
  --shadow-sm: 0 1px 3px rgba(16,32,46,.10);

  --maxw: 1200px;
  --header-h: 68px;

  /* Hero 大图区（可换肤） */
  --hero-from: #15467e;
  --hero-to:   #081a33;
  --hero-overlay: 6, 24, 46;   /* 遮罩 RGB */
}

/* ---------- 2. 基础重置 Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--text);
  /* 页面背景：暂用旧站的 background.gif（黑色星空）。CSS 位于 assets/，故用 ../bmp/，各层级页面均正确解析。
     正文落在下方 .page-wrap 浅色纸面上，星空透过两侧留白与页头/页脚显现。如需换背景，改这里即可。 */
  background: #05060a url(../bmp/background.gif) repeat fixed;
}

/* 内容纸面：居中浅色容器，保证正文可读；星空在两侧留白处显现 */
.page-wrap {
  max-width: 1300px;
  margin: 0 auto;
  background: var(--bg);
  box-shadow: 0 0 60px rgba(0, 0, 0, .55);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--brand); }
h1, h2, h3, h4 { line-height: 1.3; color: var(--text); margin: 0 0 .6em; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.section { padding: clamp(2.5rem, 1.5rem + 3vw, 4.5rem) 0; }

/* ---------- 3. 页头 / 导航 Header & Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--brand-deep);
  color: var(--white);
  box-shadow: 0 2px 12px rgba(7,39,70,.25);
}
.site-header .container {
  display: flex; align-items: center; gap: 1rem;
  height: var(--header-h);
  /* 核心修改：确保与下方 .article 的宽度和居中规则完全同步 */
  max-width: 1300px;
  margin: 0 auto;
  width: 100%;       /* 确保在小于 1300px 的屏幕上撑满 */
  padding: 0;        /* 因为你的 .article 左右内边距为 0，这里也设为 0 才能绝对对齐 */
}
.brand { display: flex; align-items: center; gap: .8rem; margin-right: auto; flex-shrink: 0;}
.brand__logo {
  width: 40px; height: 40px; flex: none;
  object-fit: contain; border-radius: 8px;
  background: #fff; padding: 3px;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__cn { font-weight: 1000; font-size: 1.2rem; color: #fff; }
/* .brand__en { font-size: .8rem; letter-spacing: .04em; color: #9fc0e6; text-transform: uppercase;white-space: nowrap; } */

.nav { display: flex; align-items: center; gap: .25rem; }
.nav a {
  color: #d7e3f2; padding: .5rem .8rem; border-radius: 8px;
  font-size: 1.05rem; white-space: nowrap; font-weight: 800;
}
.nav a:hover { color: #fff; background: rgba(255,255,255,.10); }
.nav a.is-active { color: #fff; background: var(--accent); }

.nav-toggle {
  display: none; background: none; border: 0; cursor: pointer;
  width: 42px; height: 42px; padding: 8px; color: #fff;
}
.nav-toggle span { display: block; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; transition: .2s; }

/* ---------- 3b. 菜单栏右端日期框 ---------- */
.header-date {
  margin-left: .5rem; flex: none;
  padding: .3rem .85rem; border-radius: 999px;
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(159, 192, 230, .35);
  color: #eaf2ff; font-size: .9rem; font-weight: 600; letter-spacing: .02em;
  font-variant-numeric: tabular-nums; white-space: nowrap;
}
@media (max-width: 820px) {
  .header-date { margin-left: auto; font-size: .8rem; padding: .25rem .6rem; }
}

/* ---------- 6. 分区标题 Section title ---------- */
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1.6rem; flex-wrap: wrap; }
.section-title { font-size: var(--fs-h2); position: relative; padding-left: .9rem; margin: 0; }
.section-title::before {
  content: ""; position: absolute; left: 0; top: .15em; bottom: .15em;
  width: 5px; border-radius: 3px; background: linear-gradient(var(--accent), var(--accent-2));
}

/* ---------- 7. 卡片网格 Cards ---------- */
.card-grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); }
.card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column; transition: .18s; box-shadow: var(--shadow-sm);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cdd9e8; }
.card__media { aspect-ratio: 16/10; overflow: hidden; background: var(--surface-2); }
.card__media img { width: 100%; height: 100%; object-fit: cover; }
.card__body { padding: 1.1rem 1.2rem 1.3rem; display: flex; flex-direction: column; gap: .5rem; flex: 1; }
.card__title { font-size: var(--fs-h3); font-weight: 600; color: var(--text); }
.card:hover .card__title { color: var(--accent); }




/* 首页·成果展示：自动横向滚动（鼠标悬停暂停） */
.scroller { overflow: hidden; }
.scroller__track { display: flex; gap: 1.2rem; width: max-content; animation: marquee-x 90s linear infinite; }
.scroller:hover .scroller__track { animation-play-state: paused; }
@keyframes marquee-x { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.card--mini { width: 240px; flex: none; }
.card--mini .card__media { aspect-ratio: 16/11; }
.card--mini .card__title { font-size: 1rem; }
@media (prefers-reduced-motion: reduce) {
  .scroller { overflow-x: auto; }
  .scroller__track { animation: none; }
}

/* ---------- 8. 新闻/列表 News list ---------- */
.news-list { list-style: none; margin: 0; padding: 0; }
.news-list li {
  display: flex; align-items: baseline; gap: 1rem; padding: .85rem 0;
  border-bottom: 1px dashed var(--border);
}
.news-list li::before { content: "›"; color: var(--accent); font-weight: 700; flex: none; }
.news-list a { color: var(--text); flex: 1; }
.news-list a:hover { color: var(--accent); }
.news-list time { color: var(--muted); font-size: var(--fs-sm); flex: none; font-variant-numeric: tabular-nums; }

/* ---------- 9. 人员网格 People grid ---------- */
.people-group { margin-bottom: 2.5rem; }
.people-group__title { font-size: var(--fs-h3); color: var(--brand); border-bottom: 2px solid var(--brand-soft); padding-bottom: .5rem; margin-bottom: 1.4rem; }
.people-grid { display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
/* 负责人：居中占一行，卡片尺寸与下方网格一致 */
.people-leaders { display: grid; grid-template-columns: repeat(2, minmax(140px, 1fr)); gap: 1.4rem; max-width: 320px; margin: 0 auto 1.8rem; }

.person--leader .person__name { color: var(--brand); }
.person {
  text-align: center; text-decoration: none; display: block;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem .6rem; transition: .18s;
  width: 110%;
}
.person:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cdd9e8; }
.person__photo { aspect-ratio: 3/4; border-radius: var(--radius-sm); overflow: hidden; background: var(--surface-2); margin-bottom: .7rem; }
.person__photo img { width: 100%; height: 100%; object-fit: cover; }
.person__name { font-weight: 600; color: var(--text); }
.person__role { font-size: var(--fs-sm); color: var(--muted);width: 100%; }

/* ---------- 10. 论文 / 项目列表 Publications & Projects ---------- */
.pub-section { font-size: var(--fs-h2); color: var(--brand); font-weight: 700; margin: 2.6rem 0 .6rem; padding-bottom: .45rem; border-bottom: 2px solid var(--brand-soft); }
.pub-section:first-child { margin-top: 0; }
.pub-year { font-size: var(--fs-h3); color: var(--accent); font-weight: 700; margin: 1.4rem 0 .7rem; padding-left: .6rem; border-left: 4px solid var(--brand-soft); }
.pub-list, .project-list { list-style: none; margin: 0; padding: 0; }
.pub-list li, .project-list li {
  padding: .9rem 1.1rem; border-left: 3px solid var(--border);
  background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: .7rem; line-height: 1.65;
}
/* 学术论文：悬挂缩进两字符（首行顶格，次行缩进） */
.pub-list li { padding-left: calc(1.1rem + 2em); text-indent: -2em; }
.pub-list li:hover, .project-list li:hover { border-left-color: var(--accent); }
.pub-list a { font-weight: 500; }

/* ---------- 11. 正文文章 Article prose (新闻/成果/人员详情) ---------- */
.page-hero { background: var(--surface); border-bottom: 1px solid var(--border); padding: 2.2rem 0; }
.page-hero h1 { font-size: var(--fs-h1); margin: 0 0 .4rem; }
.page-hero .meta { color: var(--muted); font-size: var(--fs-sm); }
.breadcrumb { font-size: var(--fs-sm); color: var(--muted); margin-bottom: .8rem; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }

.article { max-width: 1050px; margin: 0 auto; padding: 2.5rem 0 4rem;  font-size: larger;}  /*font-family: "Times New Roman", "Songti SC", SimSun, serif;*/
.article p { margin: 0 0 1.1em; text-align: justify; text-indent: 2em; line-height: 2.2; }
/* 纯图片段落不缩进 */
.article p:has(> img:only-child) { text-indent: 0; }
.article img { margin: 1.2rem auto; border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); }
.article figure { margin: 1.6rem 0; text-align: center; }
.article figcaption { font-size: var(--fs-sm); color: var(--muted); margin-top: .5rem; }
.article h2 { font-size: var(--fs-h2); margin-top: 2rem; }
.article h3 { font-size: var(--fs-h3); margin-top: 1.6rem; }

/* 人员详情头部 */
.profile { display: grid; grid-template-columns: 220px 1fr; gap: 2rem; align-items: start; }
.profile__photo { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.profile__name { font-size: var(--fs-h1); margin-bottom: .2rem; }
.profile__role { color: var(--accent); font-weight: 600; margin-bottom: 1rem; }

/* ---------- 11b. 数据表格（毕业生等） ---------- */
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.data-table th, .data-table td { padding: .7rem .9rem; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
.data-table th { background: var(--surface); color: var(--brand); font-weight: 600; }
.data-table tbody tr:hover { background: var(--surface); }
.data-table td:nth-child(4) { white-space: normal; min-width: 220px; }



/* ---------- 12. 页脚 Footer ---------- */
.site-footer { background: transparent; color: #eef4ff; padding: 0; font-size: var(--fs-sm); }
.site-footer a { color: #e6eefc; text-decoration: underline; text-underline-offset: 2px; }
.site-footer a:hover { color: #fff; }
.site-footer__brand { font-weight: 700; color: #fff; font-size: 1.05rem; margin-bottom: .5rem; }
.site-footer p { margin: .25rem 0; }
/* 页脚月面全景（旧站 bottom1.jpg）：与首页 webtitle 横幅同宽(1300px)、居中，
   高度由叠加文字撑开——恰好放得下，单位/地址/备案等信息叠加在图片上 */
.site-footer__pano {
  position: relative;
  max-width: 1300px; margin: 0 auto;
  background: #05060a url(../bmp/bottom1.jpg) center / cover no-repeat;
}
.site-footer__pano::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(4,10,20,.80) 0%, rgba(4,10,20,.55) 52%, rgba(4,10,20,.38) 100%);
}
.site-footer__inner {
  position: relative;
  display: flex; flex-wrap: wrap; gap: 1rem 2.5rem;
  justify-content: space-between; align-items: center;
  padding: 1.4rem 28px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, .9);
}
@media (max-width: 640px) {
  .site-footer__inner { flex-direction: column; align-items: flex-start; gap: .6rem; }
}

/* ---------- 13. 工具类 / 响应式 ---------- */
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }

@media (max-width: 820px) {
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--brand-deep); padding: .5rem;
    box-shadow: var(--shadow); display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: .85rem 1rem; border-radius: 8px; }
  .nav-toggle { display: block; }
  /* 移动端精简页头：隐藏英文副标题、缩小中文标题，给日期框留位 */
  /* .brand__en { display: none; } */
  .brand__cn { font-size: 1rem; }
  .profile { grid-template-columns: 1fr; }
  .profile__photo { max-width: 220px; }
  
}

/* ---------- 14. 列表分页 Pagination（实验室动态 / 科普·新闻） ---------- */
.pagination {
  display: flex; flex-wrap: wrap; gap: .4rem;
  justify-content: center; align-items: center;
  margin-top: 1.8rem;
}
.pagination__btn {
  min-width: 2.4rem; padding: .45rem .7rem;
  border: 1px solid var(--border); background: var(--surface);
  color: var(--text); border-radius: var(--radius-sm);
  font: inherit; font-size: var(--fs-sm); line-height: 1;
  cursor: pointer; transition: color .15s, border-color .15s, background .15s;
}
.pagination__btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pagination__btn.is-active { background: var(--brand); color: #fff; border-color: var(--brand); cursor: default; }
.pagination__btn:disabled { opacity: .4; cursor: default; }
.pagination__ellipsis { padding: 0 .25rem; color: var(--muted); }

/* ---------- 15. 首页紧凑布局（参考空天院离线首页） ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.home-modern { background: #fff; }
.home-brand-banner { overflow: hidden; background: #05070c; position: relative;}
.home-brand-banner img { width: 100%; height: auto; object-fit: contain; display: block;}
/* 公共点击区域 */
.banner-link {  position: absolute;  display: block;  z-index: 10;  cursor: pointer; /* 调试用   background: rgba(255, 0, 0, 0.25);  border: 1px solid red;*/} 
/* 第一行：中国科学院空天信息创新研究院 */
.aircas-link {  left: 1.0%;  top: 7%;  width: 29%;  height: 20%;}
/* 第二行：遥感与数字地球全国重点实验室 */
.slrss-link {  left: 1.0%;  top: 27%;  width: 29%;  height: 20%;}

.home-lead { padding: 20px 0; }
.home-lead__grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(430px, 1fr); gap: 22px; align-items: stretch; }
.home-carousel, .home-news-panel { height: 390px; min-width: 0; }
.home-carousel { position: relative; overflow: hidden; background: var(--brand-deep); }
.home-carousel__slides, .home-slide { position: absolute; inset: 0; }
.home-slide { opacity: 0; visibility: hidden; color: #fff; transition: opacity .45s ease, visibility .45s ease; }
.home-slide.is-active { opacity: 1; visibility: visible; z-index: 1; }
.home-slide img { width: 100%; height: 100%; object-fit: cover; }
.home-slide__caption {
  position: absolute; z-index: 2; inset: auto 0 0; display: grid; gap: 4px;
  padding: 34px 62px 18px 22px; color: #fff;
  background: linear-gradient(transparent, rgba(2,14,28,.94));
}
.home-slide__caption strong { color: #fff; font-size: 1.16rem; line-height: 1.4; }
.home-slide__caption small { color: #d9e7f5; font-size: .78rem; }
.home-slide:hover, .home-slide:hover strong { color: #fff; }
.home-carousel__arrow {
  position: absolute; z-index: 3; top: 50%; transform: translateY(-50%);
  width: 34px; height: 48px; border: 0; color: #fff; background: rgba(5,24,48,.58);
  font: 300 2rem/1 Arial, sans-serif; cursor: pointer;
}
.home-carousel__arrow:hover { background: rgba(47,125,225,.9); }
.home-carousel__arrow--prev { left: 0; }
.home-carousel__arrow--next { right: 0; }
.home-carousel__dots { position: absolute; z-index: 4; right: 16px; bottom: 19px; display: flex; gap: 6px; }
.home-carousel__dots button { width: 8px; height: 8px; padding: 0; border: 1px solid #fff; border-radius: 50%; background: transparent; cursor: pointer; }
.home-carousel__dots button.is-active { background: #fff; }
.home-block-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 38px; border-bottom: 2px solid var(--brand); }
.home-block-head h2 { margin: 0; color: var(--brand-deep); font-size: 1.18rem; letter-spacing: .05em; }
.home-block-head a { color: var(--muted); font-size: .78rem; white-space: nowrap; }
.home-block-head a:hover { color: var(--accent); }
.home-news-list, .home-full-list { list-style: none; margin: 0; padding: 0; }
.home-news-list li { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 10px; align-items: center; height: 44px; border-bottom: 1px solid var(--border); }
.home-news-list time { color: var(--accent); font-size: .76rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.home-news-list a { overflow: hidden; color: var(--text); font-size: .86rem; line-height: 1.25; text-overflow: ellipsis; white-space: nowrap; }
.home-news-list a:hover { color: var(--accent); }
.home-strip { padding: 8px 0 10px; border-top: 1px solid var(--border); }
.home-strip--alt { background: var(--surface); }
.home-full-list { padding-top: 3px; }
.home-full-list li {
  padding: 7px 10px; border-bottom: 1px solid var(--border);
  color: var(--text); font-size: .84rem; line-height: 1.45;
}
.home-full-list li:last-child { border-bottom: 0; }
.home-full-list--papers li { padding-left: calc(10px + 2em); text-indent: -2em; }
.home-full-list a { color: var(--accent); font-weight: 500; }
.home-full-list a:hover { color: var(--brand); }
.home-result-scroller { margin-top: 6px; }
.home-result-scroller .scroller__track { gap: 12px; animation-duration: 58s; }
.home-result-scroller .card--mini { width: 210px; border-radius: 6px; }
.home-result-scroller .card--mini .card__media { aspect-ratio: 16 / 9; }
.home-result-scroller .card--mini .card__body { padding: 8px 10px 9px; }
.home-result-scroller .card--mini .card__title { font-size: .84rem; line-height: 1.35; }

@media (max-width: 980px) {
  .home-lead__grid { grid-template-columns: 1fr; }
  .home-carousel, .home-news-panel { height: 390px; }

}
@media (max-width: 640px) {
  .home-lead { padding: 12px 0; }
  .home-lead__grid { gap: 16px; }
  .home-carousel { height: 260px; }
  .home-news-panel { height: auto; }
  .home-slide__caption { padding: 30px 46px 14px 16px; }
  .home-slide__caption strong { font-size: .98rem; }
  .home-news-list li { height: auto; min-height: 39px; padding: 6px 0; }
  .home-news-list a { white-space: normal; }
  .home-strip { padding: 8px 0 10px; }
  .home-result-scroller { overflow-x: auto; }
  .home-result-scroller .scroller__track { animation: none; }
  .person { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .home-slide { transition: none; }
  .home-result-scroller .scroller__track { animation: none; }
}