/* =========================================================
   M37R10N Research - Editorial Research Index CSS
   Harmonized with Osmanthus & Rice Paper Palette (site.css)
========================================================= */
.research-index-page {
  /* 恢复主站的暖米纸质感底色与字色 */
  background:
    radial-gradient(circle at 10% 10%, rgba(181, 91, 54, 0.08), transparent 30rem),
    radial-gradient(circle at 90% 15%, rgba(53, 94, 80, 0.09), transparent 26rem),
    linear-gradient(180deg, #fbf7f0 0%, #f4efe6 100%);
  color: var(--ink);
  min-height: 100vh;
}
.research-main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px 0 64px;
}
/* 导航底部分隔 */
.directory-nav {
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}
/* --- Hero 区域 --- */
.research-hero {
  padding: 32px 0 44px;
}
.eyebrow-tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 600;
}
.research-hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 4.2vw, 3.4rem);
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 16px;
}
.hero-desc {
  max-width: 68ch;
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}
/* --- 精选头条大卡片 (Featured Card) --- */
.featured-section {
  margin-bottom: 48px;
}
.featured-card {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  background: var(--paper);
  border: 1px solid rgba(25, 33, 38, 0.09);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 12px 36px rgba(18, 28, 34, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.featured-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 48px rgba(18, 28, 34, 0.08);
  border-color: rgba(53, 94, 80, 0.25);
}
.featured-card .card-content {
  padding: 36px 36px 32px;
  display: flex;
  flex-direction: column;
}
.featured-card h2 {
  font-family: var(--serif);
  font-size: clamp(1.45rem, 2.2vw, 1.85rem);
  line-height: 1.25;
  margin: 12px 0 14px;
  font-weight: 600;
}
.featured-card h2 a {
  color: var(--ink);
  transition: color 0.15s ease;
}
.featured-card:hover h2 a {
  color: var(--accent);
}
.featured-card .summary {
  font-size: 0.96rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0 0 24px;
  flex-grow: 1;
}
.featured-card .card-media {
  background: #e9e3d8;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.featured-card .card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.featured-card:hover .card-media img {
  transform: scale(1.02);
}
/* 标签与元数据徽章 (Badges) */
.entry-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
}
.badge {
  display: inline-block;
  padding: 3px 8px;
  background: rgba(25, 33, 38, 0.05);
  border: 1px solid rgba(25, 33, 38, 0.08);
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.7rem;
}
.badge-accent {
  background: rgba(53, 94, 80, 0.12);
  color: var(--accent);
  border-color: rgba(53, 94, 80, 0.2);
  font-weight: 600;
}
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1px solid rgba(25, 33, 38, 0.06);
  font-size: 0.88rem;
}
.read-action {
  color: var(--accent);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease, color 0.15s ease;
}
.featured-card:hover .read-action,
.grid-card:hover .read-action {
  gap: 10px;
  color: var(--accent-2);
}
/* --- 随笔列表流 (Stream & Grid) --- */
.section-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 36px 0 24px;
}
.section-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}
.section-divider span {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--muted);
  font-weight: 600;
}
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
  gap: 20px;
}
.grid-card {
  background: var(--paper);
  border: 1px solid rgba(25, 33, 38, 0.08);
  border-radius: 12px;
  padding: 28px 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.grid-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(18, 28, 34, 0.05);
  border-color: rgba(53, 94, 80, 0.22);
}
.grid-card h3 {
  font-family: var(--serif);
  font-size: 1.45rem;
  line-height: 1.3;
  margin: 10px 0 10px;
  font-weight: 600;
}
.grid-card h3 a {
  color: var(--ink);
  transition: color 0.15s ease;
}
.grid-card:hover h3 a {
  color: var(--accent);
}
.grid-card .summary {
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--muted);
  margin: 0 0 18px;
}
/* --- 机构联系条 (Inquiry Bar) --- */
.institutional-inquiry {
  margin-top: 56px;
  padding: 32px 36px;
  background: rgba(255, 252, 246, 0.7);
  border: 1px dashed rgba(53, 94, 80, 0.28);
  border-radius: 12px;
}
.inquiry-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.inquiry-text h3 {
  margin: 0 0 6px;
  font-size: 1.15rem;
  color: var(--ink);
  font-weight: 600;
}
.inquiry-text p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}
.inquiry-links {
  display: flex;
  align-items: center;
  gap: 16px;
}
.btn-inquiry {
  padding: 10px 20px;
  background: var(--accent);
  color: #fff !important;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: background 0.15s ease;
}
.btn-inquiry:hover {
  background: #27483c;
}
.inquiry-phone {
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--muted);
}
/* --- 响应式适配 --- */
@media (max-width: 820px) {
  .featured-card {
    grid-template-columns: 1fr;
  }
  .featured-card .card-media {
    max-height: 240px;
  }
  .inquiry-box {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 580px) {
  .research-hero h1 {
    font-size: 2.1rem;
  }
  .featured-card .card-content {
    padding: 24px;
  }
  .grid-card {
    padding: 22px;
  }
}

/* Narrow, content-preserving adaptations to the supplied layout. */
.research-index-page .research-main { width:calc(100% - 48px); }
.research-index-page .directory-nav { position:static; }
.research-index-page .research-filters { display:flex; flex-wrap:wrap; align-items:center; gap:10px; margin:-10px 0 26px; }
.research-index-page [hidden] { display:none !important; }
.filter-tag { appearance:none; border:1px solid rgba(53,94,80,.2); background:rgba(255,252,246,.6); color:var(--muted); border-radius:999px; padding:8px 15px; font: .73rem/1.2 var(--mono); cursor:pointer; transition:background .15s ease,color .15s ease; }
.filter-tag:hover { color:var(--accent); background:rgba(53,94,80,.08); }
.filter-tag.is-active { color:#fff; background:var(--accent); border-color:var(--accent); }
.filter-status { margin-left:auto; font: .73rem/1.3 var(--mono); color:var(--muted); }
.summary p { margin:0 0 12px; color:inherit; font-size:inherit; line-height:inherit; }
.summary p:last-child { margin-bottom:0; }
.featured-card .card-content, .grid-card-copy { min-width:0; }
.featured-card h2, .grid-card h3 { text-wrap:balance; }
.featured-card .card-media { min-width:0; padding:18px; background:#e9e3d8; }
.featured-card .card-media img { height:auto; aspect-ratio:1376/768; object-fit:contain; }
.featured-card .card-footer, .grid-card .card-footer { flex-wrap:wrap; gap:12px 18px; }
.author { color:var(--muted); font-size:.8rem; }
.grid-card-layout { display:grid; grid-template-columns:minmax(0,1.35fr) minmax(0,.75fr); gap:28px; align-items:center; }
.grid-card-media { display:block; min-width:0; border-radius:8px; overflow:hidden; }
.grid-card-media img { width:100%; height:auto; display:block; }
.research-index-page .footer-hrt { padding-top:36px; padding-bottom:24px; }
.research-index-page .footer-hrt h4 { margin-bottom:12px; }
.research-index-page .footer-hrt a, .research-index-page .footer-hrt span { font-size:.84rem; }
.research-index-page .footer-hrt-bottom { margin-top:28px; padding-top:20px; }
.research-index-page a:focus-visible, .filter-tag:focus-visible { outline:2px solid var(--accent-2); outline-offset:4px; }
@media(max-width:820px) {
  .grid-card-layout { grid-template-columns:1fr; gap:22px; }
  .grid-card-media { max-width:480px; }
  .featured-card .card-media { max-height:none; padding:20px; }
  .featured-card .card-media img { max-height:300px; width:100%; }
}
@media(max-width:580px) {
  .research-index-page .research-main { width:calc(100% - 32px); padding-top:4px; }
  .research-hero { padding:24px 4px 34px; }
  .hero-desc { font-size:1rem; }
  .filter-status { flex-basis:100%; margin-left:4px; margin-top:2px; }
  .institutional-inquiry { padding:24px; margin-top:32px; }
  .inquiry-links { flex-wrap:wrap; gap:14px; }
  .btn-inquiry { display:inline-block; }
}
@media(max-width:430px) {
  .research-index-page .directory-nav { flex-wrap:wrap; gap:18px; padding:20px 24px; }
  .research-index-page .nav-links { width:100%; justify-content:space-between; font-size:1rem; }
}
@media(prefers-reduced-motion:reduce) {
  .featured-card,.grid-card,.featured-card .card-media img,.read-action,.filter-tag { transition:none; }
  .featured-card:hover,.grid-card:hover,.featured-card:hover .card-media img { transform:none; }
}


/* Fluid directory width, preserving the supplied editorial design. */
.research-index-page { --research-gutter:clamp(24px,4vw,144px); }
.research-index-page .research-main {
  width:calc(100% - var(--research-gutter) - var(--research-gutter));
  max-width:none;
}
.research-index-page .directory-nav,
.research-index-page .footer-hrt { padding-inline:var(--research-gutter); }
.research-index-page .footer-hrt-grid,
.research-index-page .footer-hrt-bottom { max-width:none; }
.research-index-page .featured-card { grid-template-columns:minmax(0,1.25fr) minmax(0,.95fr); }
.research-index-page .featured-card .card-content { padding:clamp(24px,2.4vw,48px); }
.research-index-page .featured-card .summary,
.research-index-page .grid-card .summary { max-width:76ch; font-size:clamp(.96rem,.8vw,1.1rem); }
.research-index-page .featured-section,
.research-index-page .stream-section { min-width:0; }
/* On large monitors, both publications share the available row. Flex growth
   also lets one remaining publication fill the row when a filter is active. */
@media(min-width:1800px) {
  .research-index-page .research-main { display:flex; flex-wrap:wrap; align-items:flex-start; column-gap:clamp(28px,2.3vw,64px); }
  .research-index-page .research-hero,
  .research-index-page .research-filters,
  .research-index-page .institutional-inquiry { flex:0 0 100%; min-width:0; }
  .research-index-page .featured-section { flex:1.15 1 0; margin-bottom:0; }
  .research-index-page .stream-section { flex:1 1 0; }
  .research-index-page .stream-section .section-divider { margin:0 0 16px; }
  .research-index-page .featured-card .card-content { justify-content:center; }
}
@media(max-width:820px) {
  .research-index-page .featured-card { grid-template-columns:minmax(0,1fr); }
}
@media(max-width:580px) {
  .research-index-page { --research-gutter:16px; }
  .research-index-page .featured-card .card-content { padding:24px; }
}
@media print {
  .research-index-page .research-main { display:block; width:100%; }
}