/* ==========================================================================
   肯の机加速器 - 官方样式表 (Modern, Minimal & Ultra-Responsive)
   设计风格：与截图严格一致的浅粉紫微晶网格、洋红渐变、圆角卡片与精细弥散阴影
   ========================================================================== */

:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  /* 品牌核心色彩（提取自截图设计） */
  --color-primary: #ec4899;           /* 鲜亮粉红 */
  --color-primary-dark: #be185d;      /* 深洋红 */
  --color-secondary: #9333ea;         /* 紫罗兰 */
  --color-accent-gradient: linear-gradient(135deg, #ec4899 0%, #db2777 50%, #9333ea 100%);
  --color-accent-hover: linear-gradient(135deg, #f43f5e 0%, #e11d48 50%, #a855f7 100%);
  
  /* 背景与层次色彩 */
  --bg-page: #fbf7fb;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-pill: #fae8f3;
  --bg-pill-text: #db2777;
  --bg-progress-track: #fdf2f8;
  
  /* 文本色彩 */
  --text-main: #111827;
  --text-muted: #4b5563;
  --text-light: #6b7280;
  --text-highlight: #db2777;
  
  /* 边框与阴影 */
  --border-subtle: #f3e8f1;
  --border-focus: #f472b6;
  --shadow-subtle: 0 4px 20px -2px rgba(219, 39, 119, 0.05);
  --shadow-float: 0 20px 40px -10px rgba(219, 39, 119, 0.12);
  --shadow-hover: 0 25px 50px -12px rgba(219, 39, 119, 0.18);
  
  /* 容器与圆角 */
  --max-width: 1200px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --radius-pill: 9999px;
  
  /* 转场动效 */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
  background-image: 
    linear-gradient(to right, rgba(236, 72, 153, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(236, 72, 153, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* 链接全局规范：保证 dofollow，可访问性与美观 */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 通用容器 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 90px 0;
  position: relative;
}

/* 标题徽章 Pill */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background-color: var(--bg-pill);
  color: var(--bg-pill-text);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
  box-shadow: 0 2px 6px rgba(219, 39, 119, 0.08);
}

.section-badge .dot {
  width: 7px;
  height: 7px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-main);
}

.section-title .text-gradient {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  line-height: 1.65;
  margin-bottom: 48px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 247, 251, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(236, 72, 153, 0.08);
  transition: all var(--transition-fast);
}

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

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.brand-logo-icon,
.brand-logo-img {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(219, 39, 119, 0.3);
  transition: transform 0.3s ease;
  display: block;
}

.brand-logo-icon {
  background: var(--color-accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
}

.logo-wrapper:hover .brand-logo-icon,
.logo-wrapper:hover .brand-logo-img {
  transform: rotate(360deg) scale(1.05);
}

.brand-logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.brand-slogan-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 12px;
}

.brand-slogan-pill .red-dot {
  width: 6px;
  height: 6px;
  background: #ec4899;
  border-radius: 50%;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 按钮规范 */
.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-pill);
  cursor: pointer;
  transition: all var(--transition-smooth);
  border: none;
  outline: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(219, 39, 119, 0.28);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 8px 25px rgba(219, 39, 119, 0.4);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-outline {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(219, 39, 119, 0.12);
}

.btn-recommend {
  background: linear-gradient(135deg, #ffedd5 0%, #fce7f3 100%);
  color: #be185d;
  border: 1px solid #fbcfe8;
  font-weight: 700;
}

.btn-recommend:hover {
  background: linear-gradient(135deg, #fed7aa 0%, #fbcfe8 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(236, 72, 153, 0.2);
}

.btn-lg {
  padding: 14px 30px;
  font-size: 1.05rem;
  border-radius: var(--radius-pill);
}

/* ==========================================================================
   Hero Section (完全匹配截图视觉)
   ========================================================================== */
.hero-section {
  padding: 60px 0 90px;
  overflow: visible;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 50px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-headline {
  font-size: 3.5rem;
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin: 16px 0 20px;
  color: #111827;
}

.hero-headline .brand-highlight {
  display: block;
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 4rem;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* Hero 右侧拟态工作台卡片组件 */
.hero-visual-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.dashboard-card {
  width: 100%;
  max-width: 520px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-float);
  border: 1px solid var(--border-subtle);
  position: relative;
  z-index: 1;
}

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

.dash-subhead {
  font-size: 0.8rem;
  color: var(--text-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.dash-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #111827;
  margin-top: 2px;
}

.dash-badge-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e1b4b 0%, #4338ca 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  box-shadow: 0 4px 10px rgba(67, 56, 202, 0.25);
}

/* 渐变进度条 */
.progress-bar-container {
  width: 100%;
  height: 6px;
  background: var(--bg-progress-track);
  border-radius: 10px;
  overflow: hidden;
  margin: 16px 0 24px;
}

.progress-bar-fill {
  width: 78%;
  height: 100%;
  background: var(--color-accent-gradient);
  border-radius: 10px;
  animation: progressPulse 3s infinite alternate ease-in-out;
}

@keyframes progressPulse {
  0% { width: 65%; }
  100% { width: 92%; }
}

/* 工作台内嵌套卡片列表 */
.dash-items-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dash-item-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid #f1e4ef;
  transition: all var(--transition-fast);
}

.dash-item-card:hover {
  transform: translateX(4px);
  border-color: #f472b6;
  box-shadow: 0 4px 14px rgba(236, 72, 153, 0.08);
}

.item-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: #fdf2f8;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #db2777;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.item-info-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 2px;
}

.item-info-desc {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.4;
}

/* 浮动辅助卡片：订阅已启用 */
.floating-sub-card {
  position: absolute;
  right: -20px;
  bottom: -35px;
  width: 320px;
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 18px 22px;
  box-shadow: 0 25px 45px -10px rgba(0, 0, 0, 0.12);
  border: 1px solid var(--border-subtle);
  z-index: 2;
  animation: floatCard 4s ease-in-out infinite;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.sub-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.sub-card-top .label {
  font-weight: 600;
  color: #374151;
}

.sub-card-top .status {
  font-weight: 700;
  color: #ec4899;
}

.sub-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: 8px;
  margin-top: 10px;
}

.stat-item .stat-label {
  font-size: 0.72rem;
  color: var(--text-light);
}

.stat-item .stat-val {
  font-size: 0.88rem;
  font-weight: 700;
  color: #111827;
}

/* ==========================================================================
   Core Advantages (3个大图文卡片)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-subtle);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: #fbcfe8;
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrapper {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, #fdf2f8 0%, #fce7f3 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--color-primary);
  font-size: 1.8rem;
  border: 1px solid #fbcfe8;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.feature-points {
  margin-top: 20px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-points li {
  font-size: 0.88rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-points li svg {
  color: #10b981;
  flex-shrink: 0;
}

/* ==========================================================================
   Streaming & AI Ecosystem
   ========================================================================== */
.ecosystem-container {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 45px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-subtle);
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
}

.eco-card {
  background: #faf5f9;
  border: 1px solid #f3e5f0;
  border-radius: var(--radius-md);
  padding: 22px 18px;
  text-align: center;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.eco-card:hover {
  background: #ffffff;
  transform: translateY(-4px);
  border-color: #f472b6;
  box-shadow: 0 10px 25px rgba(236, 72, 153, 0.1);
}

.eco-icon-svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.eco-name {
  font-size: 1rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 4px;
}

.eco-speed {
  font-size: 0.75rem;
  color: #059669;
  font-weight: 600;
  background: #ecfdf5;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

/* ==========================================================================
   Pricing Table
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-smooth);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.pricing-card.featured {
  border: 2px solid var(--color-primary);
  box-shadow: 0 20px 45px -10px rgba(236, 72, 153, 0.2);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  right: 28px;
  background: var(--color-accent-gradient);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 10px rgba(219, 39, 119, 0.35);
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: #111827;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-light);
  min-height: 42px;
}

.plan-price {
  margin: 24px 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

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

.price-number {
  font-size: 3.2rem;
  font-weight: 900;
  color: #111827;
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-light);
}

.plan-features-list {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.plan-features-list li svg {
  color: #10b981;
  flex-shrink: 0;
}

/* ==========================================================================
   SEO Articles Grid (图卡形式展示 12 篇专栏文章)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  padding: 24px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: #f472b6;
  box-shadow: var(--shadow-hover);
}

.article-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  color: #db2777;
  background: #fdf2f8;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 750;
  color: #111827;
  line-height: 1.45;
  margin-bottom: 10px;
}

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid #f3e8f1;
  padding-top: 14px;
  font-size: 0.8rem;
  color: var(--text-light);
}

.read-more-link {
  font-weight: 700;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  color: var(--color-primary-dark);
  gap: 8px;
}

/* ==========================================================================
   User Reviews & Testimonials
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar-initial {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fbcfe8 0%, #f472b6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #831843;
}

.user-meta-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #111827;
}

.user-meta-role {
  font-size: 0.78rem;
  color: var(--text-light);
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
}

.faq-icon-arrow {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
  transition: transform var(--transition-smooth);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 280px;
  padding: 0 26px 22px 26px;
}

/* ==========================================================================
   Footer & PBN External Links
   ========================================================================== */
.site-footer {
  background: #ffffff;
  border-top: 1px solid rgba(236, 72, 153, 0.12);
  padding: 60px 0 35px;
  margin-top: 80px;
  position: relative;
}

.footer-nav-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  transition: color var(--transition-fast);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.footer-nav-link:hover {
  color: var(--color-primary);
  background: var(--bg-pill);
}

.footer-pbn-statement {
  text-align: center;
  padding: 18px 0;
  border-top: 1px dashed #f1e4ef;
  font-size: 0.92rem;
  color: var(--text-light);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-pbn-link {
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

.footer-copyright {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 14px;
}

/* ==========================================================================
   右侧章节切换上下箭头控制器 (Section Navigator)
   ========================================================================== */
.floating-section-nav {
  position: fixed;
  right: 28px;
  bottom: 45px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav-arrow-btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border-subtle);
  color: var(--color-primary);
  box-shadow: 0 6px 16px rgba(219, 39, 119, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
}

.nav-arrow-btn:hover {
  background: var(--color-accent-gradient);
  color: #ffffff;
  transform: scale(1.1);
  box-shadow: 0 8px 24px rgba(219, 39, 119, 0.35);
}

.nav-arrow-btn:active {
  transform: scale(0.95);
}

/* ==========================================================================
   文章详情页排版规范 (Article Reader)
   ========================================================================== */
.article-reader-container {
  max-width: 860px;
  margin: 40px auto 80px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-subtle);
  border: 1px solid var(--border-subtle);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.article-h1 {
  font-size: 2.3rem;
  font-weight: 850;
  line-height: 1.3;
  color: #111827;
  margin-bottom: 16px;
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-light);
  padding-bottom: 24px;
  border-bottom: 1px solid #f1e4ef;
  margin-bottom: 32px;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #111827;
  margin: 36px 0 16px;
  position: relative;
  padding-left: 14px;
}

.article-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 5px;
  background: var(--color-accent-gradient);
  border-radius: 4px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 750;
  color: #1f2937;
  margin: 24px 0 12px;
}

.article-body p {
  font-size: 1.05rem;
  color: #374151;
  line-height: 1.85;
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 16px 0 24px 24px;
  color: #374151;
  line-height: 1.8;
}

.article-body li {
  margin-bottom: 8px;
}

.article-cta-box {
  background: linear-gradient(135deg, #fdf2f8 0%, #fce7f3 100%);
  border: 1px solid #fbcfe8;
  border-radius: var(--radius-md);
  padding: 32px;
  margin: 40px 0;
  text-align: center;
}

.article-cta-box h3 {
  font-size: 1.4rem;
  color: #831843;
  margin-bottom: 10px;
}

.article-cta-box p {
  color: #9d174d;
  margin-bottom: 20px;
  font-size: 1rem;
}

/* ==========================================================================
   移动端与响应式适配 (@media)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-headline {
    font-size: 2.8rem;
  }

  .hero-headline .brand-highlight {
    font-size: 3.2rem;
  }

  .features-grid,
  .pricing-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none; /* 移动端精简模式，优先转化 */
  }
  
  .brand-slogan-pill {
    display: none;
  }
  
  .hero-headline {
    font-size: 2.3rem;
  }

  .hero-headline .brand-highlight {
    font-size: 2.7rem;
  }
  
  .features-grid,
  .pricing-grid,
  .articles-grid,
  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .floating-sub-card {
    position: static;
    width: 100%;
    margin-top: 16px;
    animation: none;
  }
  
  .hero-visual-wrapper {
    flex-direction: column;
  }

  .article-reader-container {
    padding: 24px;
    margin: 20px 16px 60px;
  }

  .floating-section-nav {
    right: 16px;
    bottom: 25px;
  }

  .nav-arrow-btn {
    width: 42px;
    height: 42px;
  }
}