/* style/index.css */

:root {
  --primary-color: #F2C14E;
  --secondary-color: #FFD36B;
  --card-bg: #111111;
  --background-color: #0A0A0A;
  --text-main-color: #FFF6D6;
  --border-color: #3A2A12;
  --glow-color: #FFD36B;
  --button-gradient: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
}

.page-index {
  font-family: Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-main-color);
}

/* 🚨 桌面端视频区域样式（必须严格遵守） */
.page-index__video-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  /* 🚨 页头整段高度由 shared 的 body { padding-top: var(--header-offset); } 承担；此处仅用小额顶距，禁止再写 var(--header-offset) 以免双倍空白 */
  padding-top: 10px;
  background-color: var(--background-color);
}

.page-index__video-container {
  position: relative;
  width: 100%; /* 🚨 Desktop: Must include width: 100% */
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* 🚨 视频点击链接样式（必须严格遵守） */
.page-index__video-link {
  display: block;
  text-decoration: none;
  position: relative;
  width: 100%;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-index__video-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.page-index__video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 宽高比 - 🚨 PageSpeed优化：固定宽高比避免布局偏移 (CLS) */
  height: 0;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.page-index__video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 8px;
  object-fit: cover;
  pointer-events: none; /* 防止视频控件阻止点击事件 */
}

/* 🚨 视频点击提示遮罩层样式（可选，增强用户体验） */
.page-index__video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 1;
}

.page-index__video-link:hover .page-index__video-overlay {
  opacity: 1;
}

.page-index__video-click-hint {
  color: #ffffff;
  font-size: 18px;
  font-weight: bold;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  padding: 10px 20px;
  background: var(--primary-color);
  border-radius: 5px;
  white-space: nowrap;
}

/* Module 1: Core Keyword Intro Section */
.page-index__keyword-intro-section {
  padding: 80px 20px;
  background-color: var(--background-color);
  color: var(--text-main-color);
}

.page-index__keyword-intro-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.page-index__keyword-intro-row {
  display: flex;
  gap: 40px;
  align-items: center;
  margin-bottom: 60px;
}

.page-index__keyword-intro-visual {
  flex: 1;
  min-width: 0;
}

.page-index__keyword-intro-image {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  object-fit: cover;
}

.page-index__keyword-intro-content {
  flex: 1;
}

.page-index__keyword-intro-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 25px;
  line-height: 1.3;
  color: var(--text-main-color);
}

.page-index__keyword-intro-text {
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: 20px;
  color: var(--text-main-color);
}

.page-index__keyword-intro-cta {
  display: inline-block;
  padding: 14px 30px;
  background: var(--button-gradient);
  color: #ffffff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 18px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 15px rgba(242, 193, 78, 0.4);
  white-space: nowrap;
}

.page-index__keyword-intro-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(242, 193, 78, 0.6);
}

.page-index__keyword-intro-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-index__keyword-intro-stat {
  background-color: var(--card-bg);
  padding: 30px 20px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
}

.page-index__keyword-intro-stat-value {
  display: block;
  font-size: 48px;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 10px;
}

.page-index__keyword-intro-stat-label {
  display: block;
  font-size: 18px;
  color: var(--text-main-color);
}

/* Module 2: Article Category Display Area */
.page-index__articles-section {
  padding: 80px 20px;
  background-color: var(--background-color);
  color: var(--text-main-color);
}

.page-index__articles-container {
  max-width: 1200px;
  margin: 0 auto;
}

.page-index__articles-main-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  margin-bottom: 60px;
  text-align: center;
}

.page-index__articles-title-small {
  font-size: 20px;
  font-weight: 900;
  color: var(--secondary-color);
}

.page-index__articles-title-large {
  font-size: 48px;
  font-weight: 900;
  color: var(--primary-color);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.page-index__category-section {
  margin-bottom: 60px;
  padding: 40px;
  background: var(--card-bg);
  border-radius: 15px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
}

.page-index__category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
  gap: 15px;
}

.page-index__category-title-wrapper {
  display: flex;
  align-items: center;
  gap: 15px;
  flex-shrink: 1;
  min-width: 0;
}

.page-index__category-icon {
  width: 30px;
  height: 30px;
  object-fit: contain;
  filter: drop-shadow(0 0 5px rgba(255, 211, 107, 0.6)); /* subtle glow */
}

.page-index__category-title {
  font-size: 28px;
  font-weight: 600;
  margin: 0;
  color: var(--text-main-color);
}

.page-index__category-read-more {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
  white-space: nowrap;
  flex-shrink: 0;
  font-size: 17px;
}

.page-index__category-read-more:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

.page-index__articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.page-index__article-card {
  display: flex;
  flex-direction: column;
  background: transparent;
  transition: transform 0.3s ease;
}

.page-index__article-card:hover {
  transform: translateY(-5px);
}

.page-index__article-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.page-index__article-thumbnail {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 宽高比 */
  overflow: hidden;
  background: #222222;
  border-radius: 8px;
  margin-bottom: 0;
  border: 1px solid var(--border-color);
}

.page-index__article-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
}

.page-index__article-provider-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.7);
  color: #ffffff;
  padding: 4px 10px;
  border-radius: 5px;
  font-size: 13px;
  font-weight: 600;
  z-index: 1;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.page-index__article-title-link {
  display: block;
  text-decoration: none;
  color: inherit;
  margin-top: 15px;
}

.page-index__article-title {
  margin: 0;
  padding: 0;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main-color);
  transition: color 0.3s ease;
}

.page-index__article-title-link:hover .page-index__article-title {
  color: var(--primary-color);
}

/* Module 3: Media Partners/Sponsors Module */
.page-index__partners-section {
  padding: 80px 20px;
  background: var(--background-color);
}

.page-index__partners-container {
  max-width: 1200px;
  margin: 0 auto;
}

.page-index__partners-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 20px;
  align-items: center;
  justify-items: center;
}

.page-index__partner-item {
  background-color: var(--card-bg);
  border-radius: 10px;
  padding: 9px 19px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: auto;
  box-sizing: border-box;
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

/* 🚨 图片尺寸必须严格遵守：宽167px，高127px */
.page-index__partner-logo {
  width: 167px;
  height: 127px;
  object-fit: contain;
  display: block;
}

/* Module 4: Information Text Area */
.page-index__info-section {
  padding: 80px 20px;
  background: var(--background-color);
  color: var(--text-main-color);
}

.page-index__info-container {
  max-width: 1200px;
  margin: 0 auto;
}

.page-index__info-main-title {
  font-size: 42px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 50px;
  color: var(--primary-color);
  line-height: 1.3;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

.page-index__info-content {
  line-height: 1.8;
  color: var(--text-main-color);
}

.page-index__info-subsection {
  margin-bottom: 40px;
}

.page-index__info-subtitle {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 25px;
  color: var(--secondary-color);
  line-height: 1.4;
}

.page-index__info-content h4 {
  font-size: 24px;
  font-weight: 600;
  margin-top: 35px;
  margin-bottom: 18px;
  color: var(--primary-color);
}

.page-index__info-content p {
  margin-bottom: 18px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-main-color);
}

.page-index__info-list {
  margin: 25px 0;
  padding-left: 30px;
  list-style-type: disc;
}

.page-index__info-list li {
  margin-bottom: 12px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-main-color);
}

.page-index__info-list li b {
  color: var(--primary-color);
}

/* First section - always visible */
.page-index__info-first-section {
  margin-bottom: 40px;
}

/* Collapsible content area - initially hidden */
.page-index__info-expandable {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.7s ease-out;
}

.page-index__info-expandable.expanded {
  max-height: 5000px; /* Sufficiently large to cover all content */
  transition: max-height 1.2s ease-in;
}

/* Load more/Load less button - centered, not bold */
.page-index__load-less-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin: 50px auto 0;
  padding: 0;
  background: transparent;
  border: none;
  font-size: 17px;
  font-weight: normal;
  cursor: pointer;
  transition: color 0.3s ease;
  text-decoration: none;
  width: auto;
  max-width: 100%;
  box-sizing: border-box;
}

.page-index__load-less-text {
  color: var(--primary-color);
  transition: color 0.3s ease;
  white-space: nowrap;
}

.page-index__load-less-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--primary-color);
  transition: color 0.3s ease;
}

.page-index__load-less-arrow {
  font-size: 15px;
  line-height: 1;
  display: block;
}

/* Collapsed state: shows "Load more", primary color, 3 downward arrows */
.page-index__load-less-btn.collapsed .page-index__load-less-text {
  color: var(--primary-color);
}

.page-index__load-less-btn.collapsed .page-index__load-less-icon {
  color: var(--primary-color);
}

.page-index__load-less-btn.collapsed .page-index__load-less-arrow {
  display: block;
  transform: rotate(0deg);
}

/* Expanded state: shows "Load less", secondary color, 2 upward arrows */
.page-index__load-less-btn.expanded .page-index__load-less-text {
  color: var(--secondary-color);
}

.page-index__load-less-btn.expanded .page-index__load-less-icon {
  color: var(--secondary-color);
}

.page-index__load-less-btn.expanded .page-index__load-less-arrow:nth-child(1) {
  display: block;
  transform: rotate(180deg);
}
.page-index__load-less-btn.expanded .page-index__load-less-arrow:nth-child(2) {
  display: block;
  transform: rotate(180deg);
}
.page-index__load-less-btn.expanded .page-index__load-less-arrow:nth-child(3) {
  display: none;
}

/* 🚨 Mobile Responsive Design (Strictly Required) */
@media (max-width: 1024px) {
  .page-index__keyword-intro-row {
    flex-direction: column;
    gap: 30px;
  }
  .page-index__keyword-intro-content {
    text-align: center;
  }
  .page-index__keyword-intro-title {
    font-size: 38px;
  }
  .page-index__keyword-intro-cta {
    margin-top: 15px;
  }
  .page-index__articles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
  }
  .page-index__partners-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-index__info-main-title {
    font-size: 36px;
  }
  .page-index__info-subtitle {
    font-size: 28px;
  }
  .page-index__info-content h4 {
    font-size: 22px;
  }
}

@media (max-width: 768px) {
  /* All images responsive */
  .page-index img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  /* All image containers responsive */
  .page-index__video-section,
  .page-index__video-container,
  .page-index__video-link,
  .page-index__video-wrapper,
  .page-index__keyword-intro-section,
  .page-index__keyword-intro-inner,
  .page-index__keyword-intro-visual,
  .page-index__keyword-intro-content,
  .page-index__articles-section,
  .page-index__articles-container,
  .page-index__category-section,
  .page-index__article-card,
  .page-index__article-thumbnail,
  .page-index__partners-section,
  .page-index__partners-container,
  .page-index__partner-item,
  .page-index__info-section,
  .page-index__info-container,
  .page-index__info-content,
  .page-index__info-subsection {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  
  /* 🚨 Video section: padding-top from body, only small decorative padding here */
  .page-index__video-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }
  .page-index__video-container {
    padding-left: 0;
    padding-right: 0;
  }
  .page-index__video-click-hint {
    font-size: 14px !important;
    padding: 8px 16px !important;
  }

  .page-index__keyword-intro-section {
    padding: 60px 15px;
  }
  .page-index__keyword-intro-title {
    font-size: 32px;
    margin-bottom: 20px;
  }
  .page-index__keyword-intro-text {
    font-size: 16px;
    margin-bottom: 15px;
  }
  .page-index__keyword-intro-cta {
    font-size: 16px;
    padding: 12px 25px;
  }
  .page-index__keyword-intro-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .page-index__keyword-intro-stat-value {
    font-size: 40px;
  }
  .page-index__keyword-intro-stat-label {
    font-size: 16px;
  }

  .page-index__articles-section {
    padding: 60px 15px;
  }
  .page-index__articles-main-title {
    margin-bottom: 40px;
  }
  .page-index__articles-title-small {
    font-size: 18px;
  }
  .page-index__articles-title-large {
    font-size: 40px;
  }
  .page-index__category-section {
    padding: 30px 20px;
    margin-bottom: 40px;
  }
  .page-index__category-header {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 25px;
    gap: 10px;
  }
  .page-index__category-title {
    font-size: 24px;
  }
  .page-index__category-read-more {
    font-size: 15px;
    align-self: flex-end;
  }
  .page-index__articles-grid {
    grid-template-columns: repeat(1, 1fr);
    gap: 20px;
  }
  .page-index__article-title {
    font-size: 18px;
  }

  .page-index__partners-section {
    padding: 60px 15px;
  }
  .page-index__partners-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
  }
  .page-index__partner-item {
    padding: 8px 15px;
  }
  .page-index__partner-logo {
    width: 100%;
    max-width: 167px;
    height: 127px;
  }

  .page-index__info-section {
    padding: 60px 15px;
  }
  .page-index__info-main-title {
    font-size: 32px;
    margin-bottom: 40px;
  }
  .page-index__info-subtitle {
    font-size: 26px;
    margin-bottom: 20px;
  }
  .page-index__info-content h4 {
    font-size: 20px;
    margin-top: 25px;
    margin-bottom: 15px;
  }
  .page-index__info-content p,
  .page-index__info-list li {
    font-size: 16px;
  }
  .page-index__load-less-btn {
    margin-top: 40px;
    font-size: 16px;
  }
  
  /* All buttons responsive */
  .page-index__keyword-intro-cta,
  .page-index__load-less-btn {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
  }
}

@media (max-width: 480px) {
  .page-index__keyword-intro-title {
    font-size: 28px;
  }
  .page-index__keyword-intro-stats {
    grid-template-columns: repeat(1, 1fr);
  }
  .page-index__articles-main-title {
    margin-bottom: 30px;
  }
  .page-index__articles-title-small {
    font-size: 16px;
  }
  .page-index__articles-title-large {
    font-size: 32px;
  }
  .page-index__category-section {
    padding: 20px 15px;
  }
  .page-index__category-title {
    font-size: 22px;
  }
  .page-index__category-read-more {
    font-size: 14px;
  }
  .page-index__article-title {
    font-size: 16px;
  }
  .page-index__partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-index__info-main-title {
    font-size: 28px;
  }
  .page-index__info-subtitle {
    font-size: 22px;
  }
  .page-index__info-content h4 {
    font-size: 18px;
  }
  .page-index__info-content p,
  .page-index__info-list li {
    font-size: 15px;
  }
}