/* ========= 全局 ========= */
body {
  font-family: "Segoe UI", sans-serif;
  font-weight: 400;
  line-height: 1.6;
  margin: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  color: #222;
  background: transparent;
  overflow-x: hidden;
}
.project-title {
  font-family: "Source Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 700;
  font-size: 52px;
  line-height: 1.05;
  letter-spacing: -0.02em;   /* 稍微紧一点，更干练 */
  margin-top: 1px;
  margin-bottom: 0;
  color: #111;
  white-space: nowrap;       /* 标题保持一行 */
}

/* 标题里 Prophesying 的样式 */
.project-title em {
  font-style: italic;
  font-weight: 600;          /* 比主标题略轻一点，顺一点 */
}

.main-content {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

h1, h2 {
  text-align: center;
}

.center {
  text-align: center;
}

.caption {
  font-size: 14px;
  font-style: italic;
  text-align: center;
  color: #666;
  margin-bottom: 30px;
  margin-top: 10px;
}

section {
  margin: 60px 0;
}

footer.small {
  font-size: 0.8em;
  color: #888;
  margin-top: 80px;
}

/* ========= 按钮 ========= */
.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  justify-content: center;
  margin-top: 20px;
  margin-bottom: 1px;
}

.circle-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  background: #e5f0ff;
  color: #003f8a;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  box-shadow: 0 3px 6px rgba(0,0,0,0.06);
  backdrop-filter: blur(6px);
  transition: all 0.2s ease-in-out;
}

.circle-button:hover {
  background: #d2e8ff;
  transform: translateY(-1px);
}

.circle-button .icon {
  width: 18px;
  height: 18px;
  margin-right: 8px;
  vertical-align: middle;
}

.circle-button.glass {
  background: rgba(255, 255, 255, 0.2);
  color: #222;
  border: 1px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.circle-button.glass:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0,0,0,0.15);
}

.circle-button.gray {
  background-color: #f5f5f5;
  color: #333;
  box-shadow: 0 3px 6px rgba(0,0,0,0.06);
}

.circle-button.gray:hover {
  background-color: #e0e0e0;
  transform: translateY(-2px);
  box-shadow: 0 6px 10px rgba(0,0,0,0.1);
}

.circle-button.blue {
  background-color: #e1efff;
  color: #1b3556;
  box-shadow: 0 3px 6px rgba(27, 53, 86, 0.1);
}

.circle-button.blue:hover {
  background-color: #c9e4ff;
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(27, 53, 86, 0.2);
}

.circle-button.green {
  background: rgba(255, 255, 255, 0.5);
  color: #333;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.25s ease;
}

.circle-button.green:hover {
  background: rgba(255, 255, 255, 0.75);
  transform: translateY(-2px);
}

.icon {
  width: 26px !important;
  height: 26px !important;
  margin-right: 10px;
  flex-shrink: 0;
}

/* ========= HERO 部分 ========= */
.hero-header {
  width: 102vw;
  height: 52vh;
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #c8e1ff, #d1c4e9, #ffd180);
  background-size: 400% 400%;
  background-position: center center;
  animation: gradientShift 15s ease infinite;
  padding: 60px 20px;
  margin: 0;
  position: relative;
  box-sizing: border-box;
  overflow: hidden;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-content {
  position: relative;
  z-index: 2;
  border-radius: 20px;
  padding: 40px 40px;
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.top-logo-bar {
  position: absolute;
  top: 20px;
  left: 32px;
  font-size: 1.1rem;
  font-weight: 500;
  font-family: 'Segoe UI', sans-serif;
  color: #333;
  opacity: 0.75;
  z-index: 10;
  white-space: nowrap;
}

.title-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  margin-top: 10px;
  margin-bottom: 3px;
}

.title-deco-img {
  display: block;
  width: 80vw;
  max-width: 550px;
  height: auto;
  opacity: 0.95;
  margin-top: 1px;
  margin-bottom: 10px;
  z-index: 1;
  pointer-events: none;
}

/* 标题 + 副标题 */
.project-title {
  font-size: 50px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-top: 1px;
  margin-bottom: 0;
  color: #1a1a1a;
  white-space: nowrap;  /* ✅ 保证一行显示 */
}

.project-subtitle {
  font-size: 25px;
  font-weight: 400;
  color: #555;
  margin-top: 10px;
  margin-bottom: 20px;
}

/* ========= 作者块 ========= */
.authors-section {
  text-align: center;
  margin: 40px 0;
  font-size: 16px;
  line-height: 1.8;
  color: #444;
}

.authors-list {
  text-align: center;
  margin: 0 auto 24px auto;
  max-width: 960px;
  font-size: 17px;
  line-height: 1.75;
  color: #222;
  font-weight: 500;
}

.authors-list span,
.authors-list a {
  margin-right: 6px;
}

.authors-list a {
  color: #1b3556;
  text-decoration: none;
}

.authors-list a:hover {
  text-decoration: underline;
}

.authors-list sup {
  font-size: 0.65em;
}

.equal-contribution {
  font-size: 14.5px;
  font-style: italic;
  color: #777;
  margin-top: 6px;
  margin-bottom: 2px;
}

.affiliations {
  font-size: 15px;
  margin-top: 4px;
  color: #555;
}

.affiliations .inst {
  display: inline-block;
  background: rgba(255,255,255,0.3);
  border-radius: 12px;
  padding: 3px 10px;
  margin: 0 6px;
  font-style: italic;
  color: #444;
  transition: all 0.3s ease;
}

.affiliations .inst:hover {
  background: rgba(255,255,255,0.5);
  color: #111;
}

/* ========= Teaser ========= */
.teaser-section {
  text-align: center;
  margin: 60px 0;
  padding: 0 20px;
}

.teaser-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 24px;
  color: #333;
}

.teaser-image {
  max-width: 100%;
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.teaser-caption {
  max-width: 800px;
  margin: 16px auto 0;
  font-size: 16px;
  color: #555;
  font-style: italic;
  line-height: 1.6;
  /* text-align: left; */
}

/* ========= Summary ========= */
.summary-section {
  background-color: #f9f9fb;
  padding: 40px 30px;
  border-radius: 12px;
  margin: 60px 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}

.summary-title {
  font-size: 22px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

.summary-text {
  font-size: 16px;
  color: #444;
  line-height: 1.7;
  max-width: 850px;
  margin: 0 auto 20px;
  text-align: justify;
}

/* ========= prophet Section ========= */
.prophet-section {
  margin: 60px auto;
  padding: 0 20px;
  text-align: center;
}

.prophet-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 20px;
  color: #333;
}

.prophet-intro {
  font-size: 16px;
  color: #444;
  max-width: 800px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.prophet-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px;
}

.prophet-card {
  background-color: #f7f7f9;
  border-radius: 12px;
  padding: 20px 24px;
  max-width: 320px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
  text-align: left;
}

.prophet-card h3 {
  font-size: 18px;
  color: #222;
  margin-bottom: 14px;
}

.prophet-card ul {
  padding-left: 20px;
  font-size: 15px;
  color: #555;
  line-height: 1.6;
}

/* ========= prophet Distribution ========= */
.prophet-distribution {
  background-color: #f6f6f6;
  padding: 30px 20px;
  border-radius: 16px;
  max-width: 850px;
  margin: 60px auto;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.03);
}

.prophet-subtitle {
  font-size: 20px;
  font-weight: 600;
  color: #333;
  margin-bottom: 16px;
}

.prophet-distribution-img {
  max-width: 480px;
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  margin-bottom: 12px;
}

.prophet-distribution-caption {
  max-width: 800px;
  margin: 14px auto 0;
  font-size: 15px;
  color: #555;
  font-style: italic;
  line-height: 1.6;
}

.prophet-distribution-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
  align-items: center;
  margin: 60px auto;
  max-width: 1000px;
  padding: 20px;
  border-radius: 12px;
  background-color: #f9f9f9;
  box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

.prophet-distribution-row .dist-img img {
  max-width: 400px;
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

.prophet-distribution-row .dist-caption {
  flex: 1;
  min-width: 280px;
}

.prophet-distribution-row .dist-caption h3 {
  font-size: 18px;
  font-weight: 600;
  color: #333;
  margin-bottom: 12px;
}

.prophet-distribution-row .dist-caption p {
  font-size: 15px;
  color: #555;
  line-height: 1.6;
  font-style: italic;
}

/* ========= Task Vis ========= */
.task-vis-section {
  text-align: center;
  margin: 60px auto;
  padding: 0 20px;
}

.task-vis-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 24px;
  color: #333;
}

.task-vis-img {
  max-width: 100%;
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.06);
}

.task-vis-caption {
  max-width: 860px;
  margin: 16px auto 0;
  font-size: 15px;
  color: #555;
  font-style: italic;
  line-height: 1.6;
}

/* ========= prophet Construction / Grounding ========= */
.prophet-construction,
.grounding-module {
  max-width: 860px;
  margin: 60px auto;
  padding: 0 20px;
}

.section-title {
  text-align: center;
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 25px;
}

.construction-image img {
  width: 100%;
  max-width: 960px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin-bottom: 8px;
}

.construction-steps {
  font-size: 15px;
  line-height: 1.7;
  color: #333;
  text-align: left;
}

.construction-steps ol {
  padding-left: 20px;
}

.construction-steps li {
  margin-bottom: 16px;
}

/* ========= Generalization Table ========= */
.scrollable-table {
  overflow-x: auto;
  margin-top: 20px;
  border-radius: 10px;
}

.generalization-table {
  border-collapse: collapse;
  min-width: 900px;
  width: 100%;
  font-size: 14px;
  text-align: center;
}

.generalization-table thead {
  background: #f5f5f5;
  font-weight: 600;
}

.generalization-table th,
.generalization-table td {
  padding: 10px 14px;
  border: 1px solid #e0e0e0;
}

.generalization-table td:first-child {
  text-align: left;
}

.generalization-table .divider td {
  height: 10px;
  background: transparent;
  border: none;
}

.generalization-table .group-divider td,
.group-divider td {
  border-top: 2px solid #ccc;
  background: #f9f9f9;
  height: 10px;
}

/* ========= Comparison Cards ========= */
.comparison-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  justify-content: center;
  margin-top: 40px;
}

.comparison-card {
  background: #fafafa;
  border-radius: 12px;
  padding: 20px 25px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.05);
  max-width: 440px;
  flex: 1 1 380px;
}

.comparison-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.small-caption {
  font-size: 13px;
  color: #666;
  margin-bottom: 10px;
}

.small-table {
  width: 100%;
  font-size: 14px;
  border-collapse: collapse;
}

.small-table th,
.small-table td {
  border: 1px solid #ddd;
  padding: 8px 10px;
  text-align: center;
}

.small-table td:first-child {
  text-align: left;
}

.small-table .dim {
  color: #888;
  font-size: 13px;
}

/* ========= Citation ========= */
.citation-section {
  margin-top: 60px;
  padding: 20px;
  background-color: #fdfdfd;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.citation-section pre {
  background: #f6f6f6;
  padding: 15px;
  overflow-x: auto;
  font-size: 14px;
  border-left: 4px solid #ccc;
  border-radius: 6px;
  line-height: 1.5;
}

/* ========= 悬浮 TOC ========= */
.floating-toc {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #cdeeee;
  color: black;
  padding: 10px 14px;
  font-size: 14px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
  z-index: 1000;
  transition: background 0.3s ease;
}

.floating-toc:hover {
  background: #b1e0e0;
}

.toc-popup {
  display: none;
  position: fixed;
  bottom: 70px;
  right: 24px;
  background: white;
  border: 1px solid #ddd;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  padding: 12px 16px;
  z-index: 1001;
}

.toc-popup a {
  display: block;
  text-decoration: none;
  color: #333;
  padding: 6px 0;
  font-size: 14px;
}

.toc-popup a:hover {
  color: #007acc;
}

/* ========= Task Grid / Carousel ========= */
.filter-panel {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin: 20px 0;
}

.filter-panel select {
  padding: 6px 12px;
  font-size: 14px;
  border-radius: 6px;
}

.task-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
}

.task-card {
  position: relative;
  background: #f9f9f9;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  padding: 15px;
  max-width: 320px;
  width: 100%;
  text-align: left;
  padding-bottom: 40px;
}

.task-card img {
  width: 100%;
  border-radius: 6px;
  margin-bottom: 12px;
}

.task-images {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin-bottom: 12px;
}

.task-img {
  width: 100%;
  max-width: 260px;
  border-radius: 6px;
  flex-shrink: 0;
}

.task-meta {
  margin: 10px 0 12px 0;
  font-size: 13px;
  color: #444;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.task-name {
  font-weight: bold;
  color: #007acc;
  flex-basis: 100%;
}

.meta-tag {
  background: #f0f0f0;
  padding: 2px 8px;
  border-radius: 5px;
}

.format-tag {
  display: inline-block;
  font-size: 12px;
  background: #e3e3e3;
  padding: 2px 8px;
  border-radius: 5px;
  color: #444;
  margin-top: 8px;
}

/* Carousel */
.carousel-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  margin-top: 20px;
}

.carousel-track {
  display: flex;
  overflow-x: auto;
  scroll-behavior: smooth;
  gap: 20px;
  padding: 10px 0;
  margin: 0 40px;
}

.carousel-btn {
  background-color: rgba(255, 255, 255, 0.85);
  border: none;
  border-radius: 50%;
  width: 42px;
  height: 42px;
  font-size: 20px;
  font-weight: bold;
  color: #444;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  transition: all 0.2s ease;
  z-index: 10;
}

.carousel-btn:hover {
  background-color: #f2f2f2;
  transform: scale(1.1);
}

.carousel-btn.left {
  margin-left: -50px;
}

.carousel-btn.right {
  margin-right: -50px;
}

/* ========= QA 展示 ========= */
.question-block {
  position: relative;
  overflow: hidden;
}

.question-text {
  font-size: 15px;
  line-height: 1.4;
  color: #333;
  transition: max-height 0.3s ease;
}

.question-text.collapsed {
  max-height: 10em;
  overflow: hidden;
}

.question-text.expanded {
  max-height: 1000px;
}

.answer-text {
  font-size: 13.5px;
  color: #555;
  line-height: 1.5;
  margin-top: 8px;
}

.expand-btn {
  background: none;
  border: none;
  color: #007acc;
  cursor: pointer;
  font-size: 13px;
  padding: 4px 0;
  text-align: left;
}

.answer-label {
  font-weight: 600;
  margin-right: 4px;
}

.answer-float {
  position: absolute;
  bottom: 10px;
  left: 14px;
  right: 14px;
  font-size: 13px;
  color: #333;
  background: #f8f8f8;
  border-radius: 6px;
  padding: 6px 10px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
  font-family: monospace;
  white-space: normal;
  overflow-wrap: break-word;
  transition: opacity 0.2s ease;
  opacity: 1;
}

.answer-float.hidden {
  display: none;
}

/* 悬浮展开 */
.answer-float:hover {
  white-space: normal;
  overflow: visible;
  text-overflow: unset;
  max-width: 300px;
  text-align: left;
  z-index: 10;
}

.answer-toggle {
  position: absolute;
  bottom: 10px;
  left: 14px;
}

.answer-toggle button {
  font-size: 12px;
  background: #e0e0e0;
  border: none;
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
  transition: background 0.2s ease;
}

.answer-toggle button:hover {
  background: #ccc;
}

.section-subtitle {
  text-align: center;
  max-width: 800px;
  margin: 10px auto 40px;
  font-size: 16px;
  color: #555;
  line-height: 1.6;
}

/* ========= 响应式 ========= */
@media (max-width: 600px) {
  .project-title {
    font-size: 40px;
  }
  .project-subtitle {
    font-size: 18px;
  }
  .circle-button {
    font-size: 15px;
    padding: 8px 18px;
  }
  .top-logo-bar {
    font-size: 0.9rem;
    left: 16px;
    top: 12px;
    white-space: normal;
    line-height: 1.3;
    max-width: 80vw;
  }
}
.prophet-stats {
  max-width: 960px;
  margin: 32px auto 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)); /* 大屏三列 */
  gap: 20px;
  align-items: stretch;
}

/* 卡片本身的视觉样式 */
.stat-item {
  background: #f8f8fb;
  border-radius: 18px;
  padding: 18px 20px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
  border: 1px solid rgba(148, 163, 184, 0.25);
  text-align: left;
}

.stat-label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #9ca3af;
  margin-bottom: 8px;
}

.stat-value {
  display: block;
  font-size: 20px;
  font-weight: 650;
  color: #111827;
  margin-bottom: 6px;
}

.stat-note {
  display: block;
  font-size: 13px;
  color: #6b7280;
  line-height: 1.5;
}

/* 中等屏幕：两列 */
@media (max-width: 900px) {
  .prophet-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* 小屏幕：一列 */
@media (max-width: 600px) {
  .prophet-stats {
    grid-template-columns: 1fr;
  }
}
.wm-task-comparison {
  max-width: 1100px;
  margin: 60px auto 0;
  padding: 0 20px;
}

.wm-section-title {
  font-size: 22px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 8px;
}

.wm-section-subtitle {
  font-size: 15px;
  color: #555;
  text-align: center;
  max-width: 820px;
  margin: 0 auto 24px;
  line-height: 1.6;
}

.wm-task-card {
  background: #f9f9fb;
  border-radius: 18px;
  padding: 16px 18px 18px;
  margin-bottom: 18px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.05);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.wm-task-header {
  margin-bottom: 10px;
}

.wm-task-name {
  font-size: 15px;
  font-weight: 600;
  color: #111827;
}

.wm-task-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.wm-method-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #9ca3af;
  margin-bottom: 4px;
}

.wm-method video {
  width: 100%;
  display: block;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(15, 23, 42, 0.18);
  background: #000;
}

/* 中小屏自适应：先 2 列，再 1 列 */
@media (max-width: 900px) {
  .wm-task-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .wm-task-row {
    grid-template-columns: 1fr;
  }
}
.wm-section-bullets {
  font-size: 14px;
  color: #555;
  max-width: 820px;
  margin: 8px auto 0;
  padding-left: 20px;
  line-height: 1.6;
  text-align: left;
}
.wm-edit-section {
  max-width: 1100px;
  margin: 70px auto 0;
  padding: 0 20px;
}

.wm-edit-grid {
  display: flex;
  flex-direction: column;
  gap: 26px;
  margin-top: 22px;
}

.wm-edit-card {
  background: #f9f9fb;
  border-radius: 18px;
  padding: 18px 20px 20px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.05);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.wm-edit-header {
  margin-bottom: 10px;
}

.wm-edit-name {
  font-size: 15px;
  font-weight: 600;
  color: #111827;
}

.wm-edit-videos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.wm-edit-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #9ca3af;
  margin-bottom: 4px;
}

.wm-edit-method video {
  width: 100%;
  display: block;
  border-radius: 12px;
  background: #000;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.2);
}

.wm-edit-caption {
  font-size: 14px;
  color: #4b5563;
  line-height: 1.6;
  margin-top: 10px;
}

/* 小屏幕：GT 和 Edited 上下排 */
@media (max-width: 700px) {
  .wm-edit-videos {
    grid-template-columns: 1fr;
  }
}
.wm-interactive-section {
  max-width: 1100px;
  margin: 70px auto 0;
  padding: 0 20px;
}

/* 顶部 tabs */
.wm-interactive-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px auto 22px;
  justify-content: center;
}

.wm-interactive-tab {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(248, 250, 252, 0.8);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.wm-interactive-tab:hover {
  background: #eef2ff;
}

.wm-interactive-tab.active {
  background: #111827;
  color: #f9fafb;
  border-color: #111827;
}

/* 展示区 */
.wm-interactive-cases {
  max-width: 960px;
  margin: 0 auto;
}

.wm-interactive-case {
  display: none;
}

.wm-interactive-case.active {
  display: block;
}

.wm-interactive-caption {
  font-size: 14px;
  color: #4b5563;
  line-height: 1.6;
  margin-top: 10px;
  text-align: left;
}

.wm-flow-section {
  max-width: 1100px;
  margin: 70px auto 0;
  padding: 0 20px;
}

.wm-flow-bullets {
  max-width: 820px;
  margin-top: 8px;
}

.wm-flow-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.wm-flow-col-title {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #6b7280;
  margin-bottom: 8px;
  text-align: center;
}

.wm-flow-block {
  background: #f9f9fb;
  border-radius: 14px;
  padding: 10px 10px 12px;
  margin-bottom: 10px;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.wm-flow-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #9ca3af;
  margin-bottom: 4px;
}

.wm-flow-block video {
  width: 100%;
  display: block;
  border-radius: 10px;
  background: #000;
}

.wm-flow-caption {
  font-size: 14px;
  color: #4b5563;
  line-height: 1.6;
  margin-top: 14px;
  text-align: left;
}

/* 小屏幕：三列变一列 */
@media (max-width: 900px) {
  .wm-flow-grid {
    grid-template-columns: 1fr;
  }
}
.wm-flow-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

/* ⭐ 每一列当成一个“大卡片”，明显表示一个模型 */
.wm-flow-col {
  /* background: #f9f9fb; */
  background: linear-gradient(to bottom, #f9fafb, #f3f4f6);
  border-radius: 18px;
  padding: 14px 14px 16px;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.wm-flow-col-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #6b7280;
  margin-bottom: 10px;
  text-align: center;
}

/* ⭐ 列内部的 RGB / Flow 就不要再做强卡片感了，换成轻量一点的块 */
.wm-flow-block {
  background: transparent;      /* 去掉二次背景 */
  border-radius: 12px;
  padding: 0;
  margin-bottom: 10px;
  box-shadow: none;             /* 去掉阴影 */
  border: none;
}

.wm-flow-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #9ca3af;
  margin-bottom: 4px;
}

.wm-flow-block video {
  width: 100%;
  display: block;
  border-radius: 12px;
  background: #000;
}
.wm-flow-metrics {
  margin-top: 4px;
  font-size: 11px;
  color: #6b7280;
  text-align: center;
}
.wm-perturb-section {
  max-width: 1100px;
  margin: 70px auto 0;
  padding: 0 20px;
}

.wm-perturb-block {
  background: #f9f9fb;
  border-radius: 20px;
  padding: 18px 20px 20px;
  margin-top: 22px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.wm-perturb-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 12px;
}

.wm-perturb-dataset {
  font-size: 14px;
  font-weight: 600;
  color: #111827;
}

.wm-perturb-note {
  font-size: 13px;
  color: #6b7280;
}

.wm-perturb-row {
  display: grid;
  gap: 12px;
}

/* 4 列（LIBERO 上面的 row） */
.wm-perturb-row-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* 3 列（BRIDGE 2×3） */
.wm-perturb-row-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.wm-perturb-row-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.wm-perturb-row-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 260px));
  justify-content: center;  
  gap: 12px; 
}

.wm-perturb-row-2 video {
  width: 100%;
  display: block;
}

.wm-perturb-col video {
  width: 100%;
  border-radius: 14px;
  display: block;
  background: #000;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.2);
}

.wm-perturb-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #9ca3af;
  margin-bottom: 4px;
  text-align: center;
}

.wm-perturb-caption {
  font-size: 14px;
  color: #4b5563;
  line-height: 1.6;
  margin-top: 12px;
}

/* 响应式：中等屏幕收缩列数 */
@media (max-width: 1000px) {
  .wm-perturb-row-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .wm-perturb-row-3,
  .wm-perturb-row-4 {
    grid-template-columns: 1fr;
  }
}
.rl-section {
  max-width: 1100px;
  margin: 80px auto 0;
  padding: 0 20px;
}

.rl-title {
  font-size: 26px;
  font-weight: 650;
  text-align: center;
  margin-bottom: 8px;
}

.rl-intro {
  font-size: 16px;
  color: #444;
  text-align: center;
  max-width: 720px;
  margin: 0 auto 24px;
  line-height: 1.6;
}

/* figure */
.rl-figure-wrapper {
  background: #f9f9fb;
  border-radius: 20px;
  padding: 16px 18px 18px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.rl-figure {
  width: 100%;
  border-radius: 14px;
  display: block;
}

.rl-figure-caption {
  font-size: 13px;
  color: #6b7280;
  margin-top: 10px;
  text-align: left;
}

/* steps */
.rl-steps {
  margin: 22px auto 10px;
  max-width: 900px;
  padding-left: 20px;
  font-size: 14px;
  color: #374151;
  line-height: 1.7;
}

.rl-steps li {
  margin-bottom: 6px;
}

/* keywords */
.rl-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px auto 0;
  justify-content: center;
}

.rl-tag {
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #eef2ff;
  color: #1f2937;
  border: 1px solid rgba(129, 140, 248, 0.6);
  white-space: nowrap;
}

/* formula box */
.rl-formula-box {
  margin: 26px auto 0;
  max-width: 900px;
  background: #fdfdfd;
  border-radius: 14px;
  border: 1px solid rgba(209, 213, 219, 0.9);
  padding: 12px 14px 14px;
}

.rl-formula-title {
  font-size: 13px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 6px;
}

.rl-formula-code {
  margin: 0;
  padding: 6px 8px;
  background: #111827;
  color: #e5e7eb;
  border-radius: 8px;
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Courier New",
    monospace;
  font-size: 12px;
  overflow-x: auto;
}

.rl-formula-note {
  font-size: 12.5px;
  color: #4b5563;
  margin-top: 6px;
  line-height: 1.6;
}

.rl-inline {
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Courier New",
    monospace;
  font-size: 0.95em;
}

/* 小屏幕调整 */
@media (max-width: 700px) {
  .rl-title {
    font-size: 22px;
  }
  .rl-steps {
    font-size: 13px;
  }
  .rl-tag {
    font-size: 11px;
  }
}
.rl-formula-box {
  margin: 26px auto 0;
  max-width: 900px;
  background: #fdfdfd;
  border-radius: 14px;
  border: 1px solid rgba(209, 213, 219, 0.9);
  padding: 12px 14px 14px;
}

.rl-formula-title {
  font-size: 13px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 6px;
}

/* 统一 math 文本风格 */
.rl-math {
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Courier New",
    monospace;
  font-size: 12px;
  line-height: 1.6;
}

.rl-math-small {
  font-size: 0.95em;
}

/* 主公式一行，允许自动换行 */
.rl-formula-eqn {
  margin: 4px 0 8px;
  white-space: normal;
}

/* 子公式区域：两行说明 */
.rl-formula-subeqns {
  margin-top: 4px;
}

.rl-formula-row {
  margin-top: 6px;
}

.rl-formula-row-label {
  font-size: 12px;
  font-weight: 500;
  color: #4b5563;
  margin-bottom: 2px;
}

.rl-formula-row-eqn {
  font-size: 12px;
  color: #111827;
}

/* 简易“分式”视觉效果 */
.rl-frac {
  display: inline-block;
}

/* 说明文字 */
.rl-formula-note {
  font-size: 12.5px;
  color: #4b5563;
  margin-top: 8px;
  line-height: 1.6;
}
.rl-formula-title {
  font-size: 16px;      /* 和正文 strong 一样大 */
  font-weight: 700;
  color: #0f172a;       /* 比正文稍深一点也行 */
  margin-bottom: 8px;
}

.rl-formula-subtitle {
  font-size: 16px;      /* ✅ 与 title 一致 */
  font-weight: 600;
  color: #111827;
  margin-top: 16px;
  margin-bottom: 4px;
}
.rl-results-section {
  max-width: 960px;
  margin: 70px auto 0;
  padding: 0 20px;
}

.rl-table-block {
  margin-top: 32px;
}

.rl-table-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 4px;
}

.rl-table-caption {
  font-size: 14px;
  color: #555;
  margin-bottom: 12px;
}

.group-row td {
  background: #f9fafb;
  font-weight: 600;
  font-size: 13px;
  color: #4b5563;
}

.rl-row-highlight {
  background: #f9fffb;
}

.rl-gain {
  color: #059669;
  font-weight: 500;
}

.rl-table-block {
  margin-top: 32px;
}

.rl-table-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 4px;
}

.rl-table-caption {
  font-size: 14px;
  color: #555;
  margin-bottom: 12px;
}
.group-row td {
  background: #f9fafb;
  font-weight: 600;
  font-size: 13px;
  color: #4b5563;
}

.rl-row-highlight {
  background: #f9fffb;
}

.rl-gain {
  color: #059669;
  font-weight: 500;
}

.backbone-cell {
  font-weight: 600;
  background: #f9fafb;
  vertical-align: middle;
  border-right: 1px solid #e5e7eb;
}

.rl-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 14px;
  border-radius: 999px;
  border: 1.5px solid #a5b4fc; 
  background-color: #eef0f6;
  font-size: 14px;
  font-weight: 500;
  color: #1f2933;
  box-shadow: none;
  background-image: none;
}

.rl-tag-base {
  background-color: #eef0f6;
}

.rl-tag-fa {
  /* background-color: #e0f2fe; */
  background-color: #f7ebe4;
  color: #075985;
}

.rl-tag-flow {
  background-color: #dcfce7;
  color: #166534;
}


.rl-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  border-radius: 10px;
  overflow: visible;
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
  table-layout: fixed;
}

.rl-table thead {
  background: #f4f4f5;
} 

.rl-table th,
.rl-table td {
  padding: 8px 12px;
  border-bottom: 1px solid #e5e7eb;
  text-align: center;
}
.rl-results-bullets {
  margin: 8px 0 0;
  padding-left: 18px;
  font-size: 14px;
  color: #4b5563;
}

.rl-results-bullets li {
  margin-bottom: 4px;
}
 /* ===== Reward model section ===== */

.rm-section {
  margin-top: 32px;
}

.rm-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  text-align: center;
}

.rm-intro {
  font-size: 14px;
  color: #374151;
  max-width: 960px;
  margin-bottom: 8px;
}

.rm-bullets {
  margin: 8px 0 0;
  padding-left: 20px;
  font-size: 14px;
  color: #4b5563;
}

.rm-bullets li {
  margin-bottom: 4px;
}

/* 两张小卡片并排 */
.rm-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 16px;
}

.rm-card {
  flex: 1 1 0;
  min-width: 260px;
  background: #f9fafb;
  border-radius: 16px;
  border: 1px solid #e5e7eb;
  padding: 16px 18px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
}

.rm-card-title {
  font-size: 14px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 6px;
}

.rm-card-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.rm-card-body {
  font-size: 13px;
  color: #4b5563;
  line-height: 1.5;
}

.rm-card-body ol,
.rm-card-body ul {
  padding-left: 18px;
  margin: 6px 0 0;
}

.rm-card-body li {
  margin-bottom: 3px;
}
.rw-video-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.rw-video-card {
  background: #f9fafb;
  border-radius: 18px;
  padding: 12px 12px 16px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
}

.rw-video-label {
  font-size: 11px;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.rw-video-card video {
  width: 100%;
  border-radius: 12px;
  display: block;
}
.realworld-bullets {
  margin: 12px 0 0;
  padding-left: 1.4rem;        /* 留一点空间给圆点 */
  max-width: 820px;            /* 和正文宽度差不多即可 */
  font-size: 14px;
  line-height: 1.6;
  color: #374151;              /* 深灰，比纯黑柔和一点 */
}

.realworld-bullets li {
  margin-bottom: 4px;
}
.realworld-section {
  margin-top: 48px;
}

.realworld-grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

@media (max-width: 800px) {
  .realworld-grid {
    grid-template-columns: 1fr;
  }
}

.realworld-card {
  background: #f9fafb;
  border-radius: 16px;
  padding: 10px 12px 12px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
}

.realworld-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #6b7280;
  margin-bottom: 6px;
}

.realworld-card video {
  width: 100%;
  border-radius: 12px;
  display: block;
}

/* 你之前已经有 .realworld-bullets 就不用改了，给参考一版一致风格的： */
.realworld-bullets {
  margin-top: 16px;
  padding-left: 20px;
  color: #4b5563;
  font-size: 14px;
  line-height: 1.6;
}

.realworld-bullets li + li {
  margin-top: 4px;
}
/* 整页平滑滚动 */
html {
  scroll-behavior: smooth;
}

/* 顶部导航容器 */
.site-header {
  position: sticky;        /* 跟随滚动，滚到顶部后吸附 */
  top: 0;
  z-index: 100;            /* 盖在视频、图上面 */
  backdrop-filter: blur(14px);  /* 毛玻璃效果 */
  background: rgba(248, 250, 252, 0.86); /* very light 背景 */
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

/* 导航内部布局 */
.site-nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
}

/* 左侧 logo/标题 */
.nav-logo {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 14px;
  color: #111827;
  text-decoration: none;
}

/* 右侧链接区域 */
.nav-links {
  display: flex;
  gap: 18px;
}

/* 单个导航链接 */
.nav-links a {
  text-decoration: none;
  color: #4b5563;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: 999px;
  transition: background-color 0.18s ease, color 0.18s ease,
              transform 0.12s ease;
}

/* hover / focus 效果 */
.nav-links a:hover,
.nav-links a:focus-visible {
  background-color: rgba(148, 163, 184, 0.18);
  color: #111827;
  transform: translateY(-1px);
}

/* 如果想手动标记当前页面 section，可以给链接加 .nav-active */
.nav-links a.nav-active {
  background-color: #111827;
  color: #f9fafb;
}

/* 小屏幕下让链接自动换行，避免挤爆 */
@media (max-width: 800px) {
  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 8px;
  }

  .nav-logo {
    font-size: 13px;
  }
}
/* 顶部导航右侧整体 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

/* 一级导航容器 */
.nav-item {
  position: relative;
  font-size: 14px;
}

/* 一级普通链接（无子菜单） */
.nav-item.nav-plain {
  text-decoration: none;
  color: #4b5563;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: 999px;
  transition: background-color 0.18s ease, color 0.18s ease,
              transform 0.12s ease;
}

/* 一级带子菜单的父链接 */
.nav-parent {
  text-decoration: none;
  color: #4b5563;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  transition: background-color 0.18s ease, color 0.18s ease,
              transform 0.12s ease;
}

/* hover 效果（父项 & 普通项） */
.nav-parent:hover,
.nav-item.nav-plain:hover,
.nav-parent:focus-visible,
.nav-item.nav-plain:focus-visible {
  background-color: rgba(148, 163, 184, 0.18);
  color: #111827;
  transform: translateY(-1px);
}

/* 有子菜单的一级导航小三角图标 */
.has-submenu .nav-parent::after {
  content: "▾";
  font-size: 10px;
  margin-left: 4px;
  opacity: 0.7;
}

.nav-submenu {
  position: absolute;
  top: 100%;                 /* ✅ 紧贴着父元素底部 */
  left: 50%;
  transform: translate(-50%, 4px);  /* 往下轻轻挪一点点 */
  margin-top: 0;             /* 不要再加额外 gap 了 */
  min-width: 190px;
  padding: 8px;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.25);
  display: flex;
  flex-direction: column;
  gap: 4px;

  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
  z-index: 150;
}

.nav-item:hover .nav-submenu,
.nav-item:focus-within .nav-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 6px);  /* 展开时再往下挪一点，有轻微动效 */
}
.nav-item.open .nav-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 6px);
}
/* 二级菜单里的链接样式 */
.nav-submenu a {
  text-decoration: none;
  font-size: 13px;
  color: #4b5563;
  padding: 6px 8px;
  border-radius: 8px;
  white-space: nowrap;
}

/* hover 高亮二级菜单 */
.nav-submenu a:hover,
.nav-submenu a:focus-visible {
  background-color: #f3f4ff;
  color: #111827;
}

/* 让 Code 这种普通一级链接看起来也像 pill */
.nav-item.nav-plain:hover {
  background-color: rgba(148, 163, 184, 0.18);
}

/* 小屏幕简单压缩布局：导航可换行，子菜单仍然是下拉 */
@media (max-width: 800px) {
  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 10px;
  }
}
/* 整个交互 section */
.interactive-section {
  margin-top: 48px;
}

/* 卡片容器 */
.interactive-demo {
  max-width: 480px;
  margin: 20px auto 0;
  padding: 20px 24px;
  border-radius: 20px;
  background: #f1f3f4;
  box-shadow: 0 8px 24px rgba(0, 4, 15, 0.06);
}


/* 视频区域：保持 16:9 比例 */
.interact-video-wrapper {
  position: relative;
  width: 100%;
  border-radius: 18px;
  overflow: hidden;
  background: #111827;
  margin-bottom: 16px;
}

.interactive-demo {
  max-width: 520px;              /* 可以按需改宽度 */
  margin: 24px auto 0;
  padding: 20px 24px;
  border-radius: 24px;           /* 圆角稍大一点，和右图类似 */
  background: #f9fafb;           /* 卡片浅灰背景 */
  border: 1px solid #e5e7f0;     /* 细浅边框 */
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.06); /* 柔一点的阴影 */
}

/* 视频区域保持卡片内的圆角感觉 */
.interact-video-wrapper {
  position: relative;
  width: 100%;
  border-radius: 18px;
  overflow: hidden;
  background: #111827;
  margin-bottom: 16px;
  border: 1px solid #e5e7f0;     /* 跟外层风格一致一点 */
}
/* 覆盖到比例盒子里的封面 / 视频 */
.interact-cover,
.interact-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.interact-video-wrapper {
  width: 100%;
  border-radius: 18px;
  overflow: hidden;
  background: #111827;
  margin-bottom: 16px;
}

/* 删掉这个 16:9 盒子 */
.interact-video-wrapper::before {
  content: none;
}

/* 封面 / 视频：按原始比例缩放，高度自适应 */
.interact-cover,
.interact-video {
  position: relative;   /* 不再 absolute 覆盖 */
  width: 100%;
  height: auto;         /* 关键：高度随比例变化 */
  display: block;
  object-fit: contain;  /* 不裁切画面；想铺满可以改成 cover */
}

/* 默认显示封面，视频隐藏 */
.interact-video {
  display: none;
}

/* 默认显示封面，视频隐藏 */
.interact-video {
  display: none;
}

.interact-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;

}

.interact-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;          
  margin-top: 6px;
  /* justify-content: center; */
}

.interact-group-title {
  font-size: 13px;
  font-weight: 600;
  color: #6b7280;
  margin-right: 8px;
  text-align: right;
  /* width: 150px; */
}

/* 普通小按钮 */
.interact-btn {
  border: 1px solid #e5e7eb;
  background: #ffffff;
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease,
    transform 0.1s ease;
}

.interact-btn:hover {
  background: #f3f4ff;
  border-color: #a5b4fc;
}

.interact-btn.active {
  background: #e0ebff;
  border-color: #4f46e5;
  color: #111827;
}

/* Generate / Stop */
.interact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
  justify-content: center;
}

.interact-main-btn,
.interact-secondary-btn {
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease,
    transform 0.1s ease;
}

.interact-main-btn {
  background: #4f46e5;
  color: #ffffff;
}

.interact-main-btn:hover {
  background: #4338ca;
}

.interact-secondary-btn {
  background: #ffffff;
  color: #374151;
  border-color: #e5e7eb;
}

.interact-secondary-btn:hover {
  background: #f3f4f6;
}

/* 提示文字 */
.interact-hint {
  margin-top: 4px;
  font-size: 12px;
  color: #6b7280;
}

/* 移动端自适应 */
@media (max-width: 640px) {
  .interactive-demo {
    padding: 16px 16px;
  }

  .interact-group {
    align-items: flex-start;
  }
}
/* .interactive-bullets {
  margin: 4px 0 16px;
  padding-left: 20px;
  font-size: 14px;
  color: #4b5563;
}

.interactive-bullets li + li {
  margin-top: 4px;
} */
.interactive-bullets {
  margin-top: 8px;
  padding-left: 20px;
  font-size: 13px;
  color: #4b5563;
  list-style: decimal; /* 用数字 1. 2. 3. 4. */
}

.interactive-bullets li + li {
  margin-top: 2px;
}
/* Hero 占满一屏 */
.hero-header {
  position: relative;
  height: 100vh;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #ffffff;
  overflow: hidden;
}

/* 背景：渐变 + 可选图片 */
.hero-background {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(245, 111, 183, 0.78), rgba(90, 133, 255, 0.9)),
    url("assets/hero/prophrl-hero.jpg") center center / cover no-repeat;
  filter: brightness(0.9);
  z-index: -1;
}

.hero-content {
  max-width: 880px;
  padding: 0 24px;
}

/* 大标题：只写 ProphRL，类似 AMS 的大字 */
.hero-main-title {
  font-size: clamp(64px, 14vw, 142px);
  line-height: 1;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 10px;
}

/* 副标题：论文题目 */
.hero-subtitle {
  font-size: 22px;
  line-height: 1.4;
  margin: 0;
}
.hero-links {
  margin-top: 34px;              /* 和标题拉开一点距离 */
  display: flex;
  justify-content: center;
  gap: 40px;                     /* arXiv 和 Code 之间更宽 */
  flex-wrap: wrap;
}

.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;                     /* 图标和文字之间更宽 */
  padding: 8px 0;                /* 链接本身更“厚”一点 */
  font-size: 16px;               /* 字号从 14 → 16 */
  font-weight: 500;
  color: #ffffff;
  text-decoration: none;
  border-bottom: 2px solid rgba(255, 255, 255, 0.5);  /* 下划线更粗一点 */
  opacity: 0.95;
  transition: border-color 0.15s ease, opacity 0.15s ease,
              transform 0.15s ease;
}

.hero-link-icon {
  width: 22px;                   /* 图标整体放大 */
  height: 22px;
}

.hero-link:hover {
  border-bottom-color: rgba(255, 255, 255, 1);
  opacity: 1;
  transform: translateY(-1px);
}

.hero-meta {
  background: transparent;
  border: 0;
}

/* 作者行 */
.hero-authors {
  text-align: center;
  white-space: normal;
}

/* Equal contribution 行，稍微淡一点 */
.hero-equal {
  font-size: 12px;
  color: #6b7280;
}

/* 机构做成小 pill，更精致 */
.hero-affiliations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 8px;
  margin-top: 2px;
}

.hero-affiliations span {
  padding: 2px 10px;
  border-radius: 999px;
  background: #f3f4f6;
  font-size: 12px;
}

/* 链接颜色保持蓝色，但更细一点 */
.hero-authors a {
  color: #2563eb;
  text-decoration: none;
}

.hero-authors a:hover {
  text-decoration: underline;
}

/* 移动端稍微减小一点圆角和间距 */
@media (max-width: 640px) {
  .hero-meta-inner {
    margin: -24px auto 24px;
    border-radius: 24px;
    padding: 10px 16px 12px;
    font-size: 12px;
  }

  .hero-affiliations span {
    font-size: 11px;
  }
}

@media (max-width: 640px) {
  .hero-meta-inner {
    font-size: 12px;
  }
}
.hero-content {
  max-width: 880px;
  padding: 0 24px;
}
.hero-background {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 255, 255, 0.30), transparent 55%),
    linear-gradient(135deg, #7f7cf3 0%, #c08df3 40%, #f5a9d5 100%);
  z-index: -1;
}
/* 整块区域：白底、居中布局 */
.hero-meta {
  background: #ffffff;
  padding: 48px 16px 40px;
}

.hero-meta-inner {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.hero-paper-title {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: #111827;
  margin: 0 0 18px;
}

.hero-authors {
  font-size: 20px;
  line-height: 1.6;
  color: #374151;
}

.hero-authors a {
  color: #2563eb;
  text-decoration: none;
}

.hero-authors a:hover {
  text-decoration: underline;
}

/* 机构行：一行文本，逗号分隔 */
.hero-affiliations-line {
  margin-top: 10px;
  font-size: 18px;
  line-height: 1.5;
  color: #6b7280;
}

/* Equal contribution 放最下面一行，小一点 */
.hero-equal {
  margin-top: 10px;
  font-size: 16px;
  color: #9ca3af;
}

/* 手机端微调一下间距和字号 */
@media (max-width: 640px) {
  .hero-meta {
    padding: 36px 16px 32px;
  }

  .hero-paper-title {
    font-size: 24px;
  }

  .hero-authors {
    font-size: 14px;
  }

  .hero-affiliations-line {
    font-size: 13px;
  }
}

.hero-header {
  position: relative;
  height: 100vh;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #ffffff;
  overflow: hidden;
}

.hero-top-links {
  position: absolute;
  top: 18px;
  right: 74px;
  display: flex;
  gap: 22px;
  z-index: 10;
}

.hero-top-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;

  padding: 8px 14px;
  border-radius: 4px;
  background: transparent;
  border: none;

  color: #ffffff;
  font-family: "Bai Jamjuree", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;

  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.hero-top-link:hover {
  background: #2563eb;
  color: #ffffff;
}

.hero-top-icon {
  width: 20px;
  height: 20px;
}

.hero-main-title {
  font-size: clamp(80px, 15vw, 150px);
  line-height: 1;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.hero-subtitle {
  font-size: 20px;
  line-height: 1.5;
  margin: 0;
  opacity: 0.96;
}

@media (max-width: 768px) {
  .hero-header {
    height: 100vh;
    padding: 72px 16px 24px; 
  }

  .hero-top-links {
    top: 12px;
    right: 12px;
    gap: 10px;
  }

  .hero-top-link {
    padding: 4px 8px;
    font-size: 13px;
    font-weight: 600;
  }

  .hero-main-title {
    font-size: 14vw;     
    letter-spacing: 0.08em; 
  }

  .hero-subtitle {
    font-size: 16px;
    line-height: 1.4;
  }
}
.interact-grid-3x2 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.citation-section {
  margin-top: 60px;
}

.citation-section .section-title {
  text-align: center;
  margin-bottom: 16px;
}

.citation-section p {
  text-align: left;
  margin-bottom: 16px;
}

.bibtex-card {
  position: relative;
  padding: 24px 28px;
  border-radius: 18px;
  background: #f7f9fc;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
  overflow-x: auto;
}

.bibtex-copy-btn {
  position: absolute;
  top: 14px;
  right: 16px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  color: #64748b;
  padding: 4px;
  border-radius: 6px;
  transition: background 0.15s ease, color 0.15s ease;
}

.bibtex-copy-btn:hover {
  background: rgba(148, 163, 184, 0.16);
  color: #0f172a;
}

.bibtex-pre {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  color: #0f172a;
  white-space: pre;
}

.bibtex-code {
  display: block;
}

.hl-key {
  color: #dc2626;
  font-weight: 500;
}

.hl-id {
  color: #1d4ed8;
}

.hl-field {
  color: #2563eb;
}

.hl-op {
  color: #0f172a;
}

.hl-string {
  color: #1e3a8a;
}

.hl-number {
  color: #b45309;
}