/* SuperPod 技术白皮书首页样式 */

* {
  box-sizing: border-box;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin-right: auto;
  margin-left: auto;
  padding-right: 15px;
  padding-left: 15px;
}

/* Hero Section - 全屏渐变背景 */
.mdx-container {
  text-align: center;
  color: #ffffff;
  background: linear-gradient(135deg, #0b2f6b 0%, #1a4485 30%, #0d3a7a 70%, #061f4a 100%);
  min-height: 100vh;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* 背景装饰 */
.mdx-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(37, 99, 235, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(30, 64, 175, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

/* 网格装饰 */
.mdx-container::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.intro-message {
  position: relative;
  z-index: 1;
  padding: 40px 20px;
  /* 复用全站字体变量（见 custom.css） */
  font-family: var(--sp-font-heading);
  max-width: 1000px;
  margin: 0 auto;
}

.hero-content {
  margin-bottom: 16px;
}

.intro-message h1 {
  font-weight: 700;
  margin: 0;
  font-size: 5rem;
  line-height: 1.1;
  color: #ffffff;
  letter-spacing: 0.05em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.9);
  margin-top: 8px;
  letter-spacing: 0.1em;
}

.intro-message h3 {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.05em;
}

.hero-description {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.75);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.6;
  font-family: var(--sp-font-body);
}

.intro-divider {
  width: 120px;
  border: none;
  border-top: 2px solid rgba(255, 255, 255, 0.3);
  margin: 24px auto;
}

.list-inline {
  padding-left: 0;
  margin-left: -5px;
  list-style: none;
  margin-bottom: 0;
}

.list-inline li {
  display: inline-block;
  padding-right: 5px;
  padding-left: 5px;
}

.intro-message .md-button {
  margin: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.intro-message .md-button--primary {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  border: none;
  color: #ffffff;
}

.intro-message .md-button--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
  background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
}

.intro-message .md-button:not(.md-button--primary) {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #ffffff;
  backdrop-filter: blur(4px);
}

.intro-message .md-button:not(.md-button--primary):hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

/* What is SuperPod Section */
.superpod-intro-section {
  padding: 100px 0;
  background: var(--md-default-bg-color);
  border-bottom: 1px solid var(--md-typeset-table-color);
}

.superpod-intro-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.superpod-intro-content h2 {
  font-size: 2.5rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--md-primary-fg-color);
}

.superpod-intro-content p {
  font-size: 1.125rem;
  line-height: 1.9;
  margin-bottom: 32px;
  color: var(--md-typeset-color);
  opacity: 0.9;
}

.superpod-intro-content .md-button--primary {
  padding: 12px 28px;
  font-size: 1rem;
  border-radius: 8px;
  background: var(--md-primary-fg-color);
  color: #ffffff;
}

.superpod-intro-content .md-button--primary:hover {
  background: var(--md-primary-fg-color--light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(11, 47, 107, 0.3);
}

/* Feature Sections */
.superpod-feature-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--md-typeset-table-color);
}

.superpod-feature-section:nth-child(even) {
  background: rgba(128, 128, 128, 0.03);
}

.superpod-feature-content {
  display: flex;
  align-items: center;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.superpod-feature-icon {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--md-primary-fg-color) 0%, var(--md-primary-fg-color--light) 100%);
  border-radius: 24px;
  box-shadow: 0 8px 24px rgba(11, 47, 107, 0.2);
}

.superpod-feature-icon .twemoji {
  font-size: 3rem;
}

.superpod-feature-text {
  flex: 1;
}

.superpod-feature-text h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--md-primary-fg-color);
}

.superpod-feature-text p {
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
  color: var(--md-typeset-color);
  opacity: 0.85;
}

.superpod-feature-text .md-button {
  font-size: 0.9rem;
  color: var(--md-primary-fg-color);
  padding: 0;
  background: none;
  border: none;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.superpod-feature-text .md-button:hover {
  transform: translateX(4px);
  color: var(--md-accent-fg-color);
}

/* Reverse layout */
.superpod-feature-section.reverse .superpod-feature-content {
  flex-direction: row-reverse;
}

/* 参与单位 Section */
.superpod-partners-section {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--md-default-bg-color) 0%, rgba(11, 47, 107, 0.03) 100%);
}

.superpod-partners-section h2 {
  font-size: 2.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 60px;
  color: var(--md-primary-fg-color);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}

.partners-single {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 24px;
}

.partner-card {
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-typeset-table-color);
  border-radius: 12px;
  padding: 24px 20px;
  text-align: center;
  transition: all 0.3s ease;
}

.partner-card.main {
  padding: 32px 64px;
  border-radius: 16px;
  border: 2px solid var(--md-primary-fg-color);
  background: linear-gradient(135deg, rgba(11, 47, 107, 0.03) 0%, rgba(37, 99, 235, 0.05) 100%);
}

.partner-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  border-color: var(--md-primary-fg-color);
}

.partner-card.main:hover {
  box-shadow: 0 12px 32px rgba(11, 47, 107, 0.15);
}

.partner-name {
  font-size: 1rem;
  font-weight: 500;
  color: var(--md-typeset-color);
}

.partner-card.main .partner-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--md-primary-fg-color);
}

/* Responsive Design */
@media (max-width: 960px) {
  .intro-message h1 {
    font-size: 3.5rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .intro-message .list-inline li {
    display: block;
    padding: 0;
    margin-bottom: 12px;
  }

  .intro-message .md-button {
    display: block;
    margin: 0 auto 12px;
    width: 90%;
    max-width: 300px;
  }

  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .intro-message h1 {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .superpod-feature-content {
    flex-direction: column;
    text-align: center;
    gap: 32px;
  }

  .superpod-feature-section.reverse .superpod-feature-content {
    flex-direction: column;
  }

  .superpod-feature-icon {
    width: 100px;
    height: 100px;
  }

  .superpod-feature-icon .twemoji {
    font-size: 2.5rem;
  }

  .superpod-intro-content h2,
  .superpod-partners-section h2 {
    font-size: 2rem;
  }

  .partners-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .intro-message h1 {
    font-size: 2rem;
  }

  .intro-message .md-button {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .superpod-intro-section,
  .superpod-partners-section {
    padding: 60px 0;
  }

  .superpod-feature-section {
    padding: 50px 0;
  }
}