/* ==========================================================================
   宝贝云 (BabyCloud) 官方网站 - 核心样式表
   域名: bby004.homes
   框架: 19 纱幕渐变 柔和纱幕飘动
   ========================================================================== */

:root {
  /* 品牌色彩系统 - 超高清、明亮通透、纯净高对比度调色板 */
  --bg-deep: #060710;
  --bg-surface: #0c0e20;
  --bg-card: #10142e;
  --bg-card-hover: #171d40;
  --bg-glass-subtle: rgba(255, 255, 255, 0.08);
  
  --color-primary: #a855f7;
  --color-primary-light: #c084fc;
  --color-primary-dark: #7e22ce;
  --color-secondary: #06b6d4;
  --color-secondary-light: #38bdf8;
  --color-accent: #ec4899;
  --color-accent-light: #f472b6;
  --color-success: #10b981;
  
  /* 文字层级颜色（全高亮白与浅冰蓝，拒绝灰暗含糊） */
  --text-main: #ffffff;
  --text-secondary: #f8fafc;
  --text-muted: #e2e8f0;
  --text-dim: #cbd5e1;
  
  /* 边框与阴影（高对比立体亮边，杜绝混浊） */
  --border-subtle: rgba(255, 255, 255, 0.18);
  --border-glass: rgba(255, 255, 255, 0.28);
  --border-glow: rgba(168, 85, 247, 0.6);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.45);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.8);
  --shadow-glow: 0 0 40px rgba(168, 85, 247, 0.4);
  
  /* 字体与间距 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  
  --max-width: 1200px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 全局重置与基础设定 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-deep);
  color: var(--text-main);
  scroll-behavior: smooth;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  position: relative;
  background-color: var(--bg-deep);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img, svg {
  display: block;
  max-width: 100%;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* 布局辅助容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 页面主内容区域层级规范（置于背景之上，绝不受任何蒙层遮挡） */
main {
  position: relative;
  z-index: 10;
}

.section {
  position: relative;
  padding: 96px 0;
  z-index: 10;
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }
}

/* 标题样式规范 */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: var(--radius-full);
  color: var(--color-primary-light);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  backdrop-filter: blur(8px);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff 20%, #e2e8f0 70%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.75rem;
  }
  .section-desc {
    font-size: 0.95rem;
  }
}

/* ==========================================================================
   顶部导航栏 (Navbar)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--transition-smooth);
  background: rgba(10, 12, 24, 0.45);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.site-header.scrolled {
  background: rgba(10, 12, 24, 0.88);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo-img {
  height: 42px;
  width: auto;
  transition: transform var(--transition-fast);
}

.nav-brand:hover .brand-logo-img {
  transform: scale(1.03);
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 按钮通用样式规范 - 符合第一方口吻，主按钮【立即前往注册】 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #a855f7 0%, #ec4899 100%) !important;
  color: #ffffff !important;
  box-shadow: 0 4px 24px rgba(236, 72, 153, 0.65), 0 0 16px rgba(168, 85, 247, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.55) !important;
  position: relative;
  overflow: hidden;
  border: 1.5px solid rgba(255, 255, 255, 0.55) !important;
  font-weight: 800 !important;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #c084fc 0%, #f472b6 100%) !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 34px rgba(236, 72, 153, 0.85), 0 0 22px rgba(192, 132, 252, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.7) !important;
  color: #ffffff !important;
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.12) !important;
  color: #ffffff !important;
  border: 2px solid rgba(255, 255, 255, 0.7) !important;
  backdrop-filter: blur(12px);
  font-weight: 800 !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.4) !important;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.24) !important;
  border-color: #38bdf8 !important;
  box-shadow: 0 6px 26px rgba(56, 189, 248, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.5) !important;
  transform: translateY(-2px);
  color: #ffffff !important;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
}

/* 移动端汉堡切换按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
}

@media (max-width: 992px) {
  .nav-links, .nav-actions .btn {
    display: none;
  }
  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* 移动端侧滑抽屉 */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 360px;
  height: 100vh;
  background: rgba(14, 17, 36, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-left: 1px solid var(--border-glass);
  z-index: 1001;
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: right var(--transition-smooth);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
}

.mobile-drawer.open {
  right: 0;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.drawer-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.75rem;
  cursor: pointer;
  padding: 4px 8px;
}

.drawer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.drawer-link {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: block;
  padding: 8px 0;
}

.drawer-link:hover {
  color: var(--color-primary-light);
}

.drawer-cta {
  margin-top: auto;
  padding-top: 24px;
}

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-smooth);
}

.drawer-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* ==========================================================================
   首屏 Hero 区域
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-top: 140px;
  padding-bottom: 80px;
  overflow: hidden;
  z-index: 10;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 22px;
  background: rgba(168, 85, 247, 0.28) !important;
  border: 1.5px solid rgba(192, 132, 252, 0.75) !important;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.hero-badge-dot {
  width: 9px;
  height: 9px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 12px #34d399, 0 0 4px #ffffff;
}

.hero-badge-text {
  font-size: 0.95rem;
  font-weight: 800;
  color: #ffffff !important;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
  color: #ffffff !important;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.95);
  word-break: break-word;
}

.title-brand {
  display: inline-block;
  white-space: nowrap;
}

.title-phrase {
  display: inline-block;
  white-space: nowrap;
}

.title-sub {
  display: inline-block;
}

.hero-title-highlight {
  background: linear-gradient(90deg, #ffffff 0%, #f472b6 30%, #c084fc 65%, #67e8f9 100%) !important;
  -webkit-background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
  display: inline-block !important;
  font-weight: 900 !important;
  filter: drop-shadow(0 2px 8px rgba(168, 85, 247, 0.45));
}

.hero-desc {
  font-size: 1.15rem;
  color: #f1f5f9 !important;
  font-weight: 500;
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 620px;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.9);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  flex-wrap: wrap;
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff !important;
  background: rgba(255, 255, 255, 0.1) !important;
  border: 1.5px solid rgba(255, 255, 255, 0.28) !important;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
}

.trust-icon {
  font-size: 1.15rem;
}

/* 首屏右侧超清晰专线运行矩阵（高对比、实底、明亮数值） */
.hero-visual {
  position: relative;
}

.hero-card {
  position: relative;
  background: #0d122e !important;
  border: 2px solid rgba(56, 189, 248, 0.55) !important;
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.85), 0 0 35px rgba(56, 189, 248, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.4) !important;
}

.card-decor-gauze {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.25) 0%, transparent 70%);
  filter: blur(20px);
  z-index: 0;
  pointer-events: none;
}

.hero-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 22px;
}

.hero-stat-box {
  background: #141b3d !important;
  border: 1.5px solid rgba(56, 189, 248, 0.35) !important;
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.18) !important;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.hero-stat-box:hover {
  transform: translateY(-3px);
  border-color: #38bdf8 !important;
  background: #1c2552 !important;
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.35) !important;
}

.stat-label {
  font-size: 0.85rem;
  color: #cbd5e1 !important;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 700 !important;
}

.stat-number {
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 1.1;
  color: #ffffff !important;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.9);
}

.stat-number-unit {
  font-size: 1.15rem;
  color: #38bdf8 !important;
  font-weight: 800 !important;
  margin-left: 6px;
  text-shadow: 0 0 12px rgba(56, 189, 248, 0.5);
}

.hero-stream-strip {
  background: #13193a !important;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1.5px solid rgba(56, 189, 248, 0.35) !important;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.stream-label {
  font-size: 0.9rem;
  color: #ffffff !important;
  font-weight: 700 !important;
}

.stream-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.stream-tag {
  font-size: 0.85rem;
  font-weight: 700 !important;
  padding: 6px 13px;
  background: #1f2754 !important;
  border: 1.5px solid rgba(56, 189, 248, 0.5) !important;
  border-radius: 6px;
  color: #ffffff !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-title {
    font-size: 2.3rem;
  }
}

@media (max-width: 640px) {
  .hero-section {
    padding-top: 100px;
    padding-bottom: 50px;
  }
  .hero-title {
    font-size: clamp(1.45rem, 6.2vw, 1.85rem);
    line-height: 1.32;
    margin-bottom: 18px;
  }
  .hero-desc {
    font-size: 0.95rem;
    line-height: 1.65;
    margin-bottom: 28px;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
  .hero-trust {
    gap: 8px;
  }
  .trust-item {
    font-size: 0.8rem;
    padding: 6px 12px;
  }
  .hero-card {
    padding: 22px 16px;
  }
  .hero-stat-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .hero-stat-box {
    padding: 14px 12px;
  }
  .stat-number {
    font-size: 1.7rem;
  }
  .stat-number-unit {
    font-size: 0.9rem;
  }
  .stat-label {
    font-size: 0.75rem;
  }
  .hero-stream-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .stream-tags {
    gap: 6px;
  }
}

/* ==========================================================================
   核心功能区 (Features)
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 16px 36px rgba(168, 85, 247, 0.18);
  background: var(--bg-card-hover);
}

.feature-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.18), rgba(6, 182, 212, 0.18));
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--color-primary-light);
  margin-bottom: 22px;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.68;
}

@media (max-width: 992px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   套餐价格展示区 (Pricing & Packages)
   ========================================================================== */
.pricing-section {
  position: relative;
}

/* 周期切换器 */
.pricing-switcher-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 48px;
}

.pricing-switcher {
  display: inline-flex;
  padding: 6px;
  background: rgba(18, 22, 48, 0.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  backdrop-filter: blur(12px);
  gap: 4px;
}

.switch-btn {
  padding: 10px 24px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}

.switch-btn:hover {
  color: #ffffff;
}

.switch-btn.active {
  background: linear-gradient(135deg, #9333ea, #ec4899);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(147, 51, 234, 0.35);
}

.switch-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

/* 套餐卡片网格 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.price-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
}

.price-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(168, 85, 247, 0.2);
  border-color: rgba(168, 85, 247, 0.45);
}

.price-card.featured {
  background: linear-gradient(180deg, rgba(32, 26, 68, 0.75) 0%, rgba(18, 22, 48, 0.85) 100%);
  border: 1.5px solid rgba(236, 72, 153, 0.55);
  box-shadow: 0 12px 38px rgba(236, 72, 153, 0.25);
  transform: scale(1.03);
}

.price-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.card-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #ec4899, #8b5cf6);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.4);
}

.card-header-plan {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #ffffff;
}

.plan-cycle-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.plan-price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 18px 0 10px 0;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-light);
}

.price-amount {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1;
  color: #ffffff;
  letter-spacing: -1px;
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.plan-sub-billing {
  font-size: 0.825rem;
  color: var(--color-secondary-light);
  min-height: 20px;
}

.plan-features-list {
  list-style: none;
  margin: 24px 0 32px 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.925rem;
  color: var(--text-secondary);
}

.plan-feature-item svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-success);
  margin-top: 2px;
}

.plan-cta-wrap {
  margin-top: auto;
}

.plan-cta-btn {
  width: 100%;
}

@media (max-width: 992px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .price-card.featured {
    transform: none;
  }
  .price-card.featured:hover {
    transform: translateY(-8px);
  }
}

/* ==========================================================================
   使用场景 (Use Cases)
   ========================================================================== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(16px);
  display: flex;
  gap: 22px;
  transition: all var(--transition-smooth);
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: rgba(6, 182, 212, 0.4);
  background: var(--bg-card-hover);
}

.scenario-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary-light);
  font-size: 1.4rem;
}

.scenario-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #ffffff;
}

.scenario-content p {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

@media (max-width: 768px) {
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   使用教程与客户端配置 (Client Guides)
   ========================================================================== */
.client-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all var(--transition-smooth);
}

.client-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glass);
  background: var(--bg-card-hover);
}

.client-card-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.client-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: #ffffff;
}

.client-card-desc {
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.client-card-link {
  font-size: 0.85rem;
  color: var(--color-primary-light);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.client-card-link:hover {
  text-decoration: underline;
}

@media (max-width: 992px) {
  .client-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .client-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   知识文章卡片区 (Articles Section)
   ========================================================================== */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-smooth);
  backdrop-filter: blur(14px);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: rgba(168, 85, 247, 0.35);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.article-card-header {
  padding: 24px 24px 0 24px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.article-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-secondary-light);
  background: rgba(6, 182, 212, 0.12);
  padding: 3px 10px;
  border-radius: 4px;
}

.article-date {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: #ffffff;
}

.article-card-title a:hover {
  color: var(--color-primary-light);
}

.article-card-body {
  padding: 0 24px 20px 24px;
  flex-grow: 1;
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.article-card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.article-read-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-read-link:hover {
  gap: 10px;
  color: #ffffff;
}

@media (max-width: 992px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   真实用户心声与反馈提交区 (Feedback Invitation Box)
   按要求：不虚构评价、头像、星级，提供真实反馈入口
   ========================================================================== */
.feedback-box {
  background: linear-gradient(135deg, rgba(26, 22, 54, 0.75), rgba(16, 20, 42, 0.85));
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(18px);
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.feedback-title {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #ffffff;
}

.feedback-desc {
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 650px;
  margin: 0 auto 28px auto;
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 28px;
  text-align: left;
}

.feedback-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.feedback-item-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.feedback-item-val {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

@media (max-width: 768px) {
  .feedback-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   常见问题 FAQ (Accordion)
   ========================================================================== */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(14px);
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: rgba(168, 85, 247, 0.45);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--color-primary-light);
}

.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition-smooth);
  color: var(--color-primary-light);
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
}

.faq-answer-inner {
  padding: 0 24px 22px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

/* ==========================================================================
   底部页脚 (Footer)
   ========================================================================== */
.site-footer {
  position: relative;
  background: #080913;
  border-top: 1px solid var(--border-subtle);
  padding: 72px 0 36px 0;
  z-index: 10;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 18px 0 20px 0;
  max-width: 320px;
}

.footer-heading {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-domain-badge {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--color-primary-light);
  background: rgba(168, 85, 247, 0.08);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(168, 85, 247, 0.2);
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}