/* ===== 子页面通用样式 ===== */

/* 页面Hero */
.page-hero {
  padding: 120px 40px 64px;
  text-align: center;
  position: relative;
  background: var(--bg-section);
  transition: background var(--transition);
}

.page-hero-content {
  max-width: 700px;
  margin: 0 auto;
}

.page-hero-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-bg);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 16px;
  font-weight: 500;
  letter-spacing: 1px;
}

.page-hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.page-hero-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto;
}

/* 内容区域 */
.page-section {
  padding: 64px 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.page-section.alt-bg {
  background: var(--bg-section);
  max-width: 100%;
  transition: background var(--transition);
}

.page-section.alt-bg > * {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.section-title-sm {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 32px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 16px;
}

.section-title-sm::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* 步骤卡片 */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.step-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.step-number {
  width: 44px;
  height: 44px;
  background: var(--accent-bg);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.step-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.step-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* 加入指南图文布局 */
.join-layout {
  display: flex;
  align-items: flex-start;
  gap: 40px;
}

.join-layout .steps-grid {
  flex: 1;
  min-width: 0;
}

.join-image {
  flex: 1;
  min-width: 0;
  position: sticky;
  top: calc(var(--topbar-h) + 24px);
}

.join-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  display: block;
  transition: border-color var(--transition);
}

.join-layout-reverse {
  flex-direction: row-reverse;
}

/* 联系卡片 */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.contact-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  width: 56px;
  height: 56px;
  background: var(--accent-bg);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.4rem;
  color: var(--accent);
}

.contact-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.contact-card .value {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

/* 特性列表 */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}

.feature-item:hover {
  border-color: var(--border-hover);
}

.feature-item-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-bg);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}

.feature-item-text h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--text);
}

.feature-item-text p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* 响应式 */
@media (max-width: 1024px) {
  .join-layout,
  .join-layout-reverse {
    flex-direction: column;
  }

  .join-image {
    position: static;
    margin: 16px 0 0;
  }

  /* 所有 ≤1024px 使用紧凑列表步骤 */
  .steps-grid {
    gap: 0;
  }

  .step-card {
    padding: 12px 0;
    border: none;
    border-radius: 0;
    background: none;
    text-align: left;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 4px 12px;
  }

  .step-card:hover {
    border-color: transparent;
    box-shadow: none;
  }

  .step-card + .step-card {
    border-top: 1px solid var(--border);
  }

  .step-number {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 600;
    margin: 0;
    flex-shrink: 0;
  }

  .step-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
    padding-top: 2px;
    flex: 1;
  }

  .step-card p {
    width: 100%;
    padding-left: 38px;
    font-size: 0.8rem;
    line-height: 1.5;
    margin: 0;
    color: var(--text-muted);
  }
}

@media (max-width: 768px) {
  .page-hero {
    padding: 100px 20px 40px;
  }

  .page-hero-title {
    font-size: 2.2rem;
  }

  .page-section {
    padding: 32px 20px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .join-image {
    max-width: 100%;
    margin-top: 12px;
  }

  .join-image img {
    border-radius: var(--radius-sm);
  }

  .section-title-sm {
    margin-bottom: 16px;
    font-size: 1.25rem;
  }
}