/* 产品官网样式（遵循 Material 3 Expressive，复用现有设计token） */

/* 基础布局 */
.main-content {
  min-height: calc(100vh - 120px);
  padding-top: 80px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 头部 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  backdrop-filter: blur(8px);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.brand {
  color: var(--md-sys-color-on-surface);
}

.header-nav {
  display: flex;
  gap: 8px;
}

.header-nav a {
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 72px 0 48px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1200px 600px at 80% -10%, color-mix(in srgb, var(--md-sys-color-primary-container) 60%, transparent) 0%, transparent 60%),
    radial-gradient(900px 450px at 10% 0%, color-mix(in srgb, var(--md-sys-color-tertiary-container) 40%, transparent) 0%, transparent 60%);
}

.hero-container {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 24px;
  align-items: center;
}

.hero-title {
  margin: 0 0 8px 0;
  color: var(--md-sys-color-on-surface);
}

.hero-subtitle {
  margin: 0 0 20px 0;
  color: var(--md-sys-color-on-surface-variant);
}

.hero-cta {
  display: flex;
  gap: 12px;
}

.cta-primary { }
.cta-secondary { }

.hero-aside .quote-card {
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 20px;
}

.quote-icon {
  color: var(--md-sys-color-primary);
}

.quote-author {
  color: var(--md-sys-color-on-surface-variant);
}

/* 通用区块 */
.section {
  padding: 40px 0;
}

.section-title {
  margin: 0 0 20px 0;
  color: var(--md-sys-color-primary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--md-sys-color-primary-container);
}

/* 功能网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 16px;
  transition: transform var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard),
              box-shadow var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard);
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,.12), 0 2px 6px rgba(0,0,0,.08);
}

.feature-icon {
  color: var(--md-sys-color-secondary);
}

.units-card {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 16px;
}

.units-icon {
  color: var(--md-sys-color-tertiary);
}

/* 步骤 */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.step-card {
  position: relative;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 16px 16px 16px 44px;
  transition: transform var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard),
              box-shadow var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard);
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}

.step-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
}

.step-index {
  position: absolute;
  left: 12px;
  top: 12px;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.note {
  margin-top: 12px;
  color: var(--md-sys-color-on-surface-variant);
}

/* 订阅卡片 */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 12px;
}

.plan-card {
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 16px;
  transition: transform var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard),
              box-shadow var(--md-sys-motion-duration-short3) var(--md-sys-motion-easing-standard);
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}

.plan-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
}

.plan-card ul {
  margin: 8px 0 0 18px;
}

.legal {
  margin-top: 16px;
  color: var(--md-sys-color-on-surface-variant);
}

/* 下载区 */
/* 已移除下载区样式 */

/* 页脚 */
.footer {
  margin-top: 64px;
  padding: 24px 0;
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-info span {
  color: var(--md-sys-color-on-surface-variant);
}

/* 响应式 */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 600px) {
  .site-header { height: 56px; }
  .main-content { padding-top: 72px; }

  .features-grid,
  .steps-grid,
  .plans-grid {
    grid-template-columns: 1fr;
  }

  .header-nav { display: none; }
}

/* Header scroll effect */
.site-header.scrolled {
  background-color: var(--md-sys-color-surface-container-high);
  box-shadow: 0 4px 12px rgba(0,0,0,.08);
}

/* Material 3 Filled & Tonal Buttons */
.md3-filled-button, .md3-tonal-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  min-height: 40px;
  border: none;
  text-decoration: none;
  border-radius: var(--md-sys-shape-corner-large);
  font-weight: 600;
  letter-spacing: .1px;
  transition: transform var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
              box-shadow var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
              background-color var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-short2) var(--md-sys-motion-easing-standard);
}

.md3-filled-button {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: 0 2px 6px rgba(0,0,0,.12);
}

.md3-filled-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0,0,0,.16);
}

.md3-tonal-button {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.md3-tonal-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,.12);
}

.md3-filled-button .material-icons,
.md3-tonal-button .material-icons {
  font-size: 20px;
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .feature-card:hover,
  .step-card:hover,
  .plan-card:hover,
  .md3-filled-button:hover,
  .md3-tonal-button:hover {
    transform: none;
  }
}