/* ===================================================================
   瞬云 (ShunYun) - 全站主题系统 (Whole-Site Theme System)
   Ultra-translucent Glassmorphism | Signature Iris Periwinkle Palette
   =================================================================== */

:root {
  /* 白天模式 (Day Mode) - Soft Iris Icy Canvas & Frosted Refraction Luxury */
  --canvas-bg: #f2f6fa;
  --bg-gradient: radial-gradient(100% 65% at 50% 0%, #e6edf8 0%, #f2f6fa 60%, #ebf1f9 100%);
  --bg-glass-card: rgba(255, 255, 255, 0.78);
  --bg-glass-card-hover: rgba(255, 255, 255, 0.92);
  --bg-glass-pill: rgba(255, 255, 255, 0.85);
  --bg-subtle: rgba(255, 255, 255, 0.55);

  --border-glass: rgba(255, 255, 255, 0.75);
  --border-glass-subtle: rgba(226, 232, 240, 0.85);
  --border-active: rgba(108, 114, 226, 0.45);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  /* 核心主题色：瞬云蓝紫 / 鸢尾靛青 (Signature Iris Periwinkle: #6771DB ~ #7B82F6) */
  --accent-primary: #6c72e2;
  --accent-primary-hover: #5860e0;
  --accent-primary-dark: #4b52cc;
  --accent-primary-glow: rgba(108, 114, 226, 0.32);
  --accent-primary-subtle: rgba(108, 114, 226, 0.1);
  --accent-cyan: #06b6d4;

  /* 现货库存软玉薄荷徽章 (#ecfdf5 text #10b981) */
  --badge-mint-bg: #ecfdf5;
  --badge-mint-text: #10b981;
  --badge-mint-border: rgba(16, 185, 129, 0.25);

  --shadow-ambient: 0 10px 30px -10px rgba(108, 114, 226, 0.15);
  --shadow-glass: 0 12px 36px -4px rgba(15, 23, 42, 0.08), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 22px 48px -6px rgba(108, 114, 226, 0.22), 0 8px 16px -4px rgba(15, 23, 42, 0.06);

  --radius-pill: 9999px;
  --radius-card: 24px;
  --radius-sub: 16px;
  --radius-sm: 10px;

  --transition-spring: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-smooth: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 夜间暗黑模式 (Dark Mode) - Luminous Obsidian & Glowing Iris */
[data-theme="dark"] {
  --canvas-bg: #090c16;
  --bg-gradient: radial-gradient(100% 65% at 50% 0%, #12182c 0%, #090c16 60%, #060810 100%);
  --bg-glass-card: rgba(17, 24, 39, 0.74);
  --bg-glass-card-hover: rgba(26, 35, 54, 0.88);
  --bg-glass-pill: rgba(15, 23, 42, 0.85);
  --bg-subtle: rgba(255, 255, 255, 0.04);

  --border-glass: rgba(255, 255, 255, 0.12);
  --border-glass-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(129, 140, 248, 0.5);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-light: #475569;

  --accent-primary: #818cf8;
  --accent-primary-hover: #9ca3ff;
  --accent-primary-dark: #6366f1;
  --accent-primary-glow: rgba(129, 140, 248, 0.42);
  --accent-primary-subtle: rgba(129, 140, 248, 0.16);
  --accent-cyan: #38bdf8;

  --badge-mint-bg: rgba(16, 185, 129, 0.15);
  --badge-mint-text: #34d399;
  --badge-mint-border: rgba(52, 211, 153, 0.3);

  --shadow-ambient: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-glass: 0 16px 40px -4px rgba(0, 0, 0, 0.5), 0 4px 14px -2px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 24px 50px -6px rgba(129, 140, 248, 0.28), 0 0 25px rgba(108, 114, 226, 0.25);
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--canvas-bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background 0.35s ease, color 0.35s ease;
}

/* 背景光晕装饰 */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1100px;
  height: 560px;
  background: radial-gradient(circle, rgba(108, 114, 226, 0.12) 0%, rgba(6, 182, 212, 0.05) 50%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ===================================================================
   悬浮式居中胶囊导航栏 (Floating Centered Pill Navbar)
   =================================================================== */
.nav-wrapper {
  position: sticky;
  top: 16px;
  width: 100%;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 16px;
  pointer-events: none;
}

.floating-nav {
  pointer-events: auto;
  width: 100%;
  max-width: 1180px;
  height: 64px;
  background: var(--bg-glass-pill);
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px 0 14px;
  box-shadow: var(--shadow-glass);
  transition: all var(--transition-smooth);
}

.floating-nav:hover {
  border-color: var(--border-active);
  box-shadow: var(--shadow-hover);
}

/* 左侧品牌标示区 (整合瞬云 Logo 与专属字体 Wordmark) */
.brand-wordmark {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  padding-left: 4px;
}

.brand-logo-img {
  height: 42px;
  width: auto;
  object-fit: contain;
  display: block;
  transition: transform var(--transition-spring);
}

.brand-wordmark-img {
  height: 25px;
  width: auto;
  object-fit: contain;
  display: block;
  transition: transform var(--transition-spring), filter var(--transition-smooth);
}

.brand-wordmark:hover .brand-logo-img {
  transform: scale(1.08) rotate(-1deg);
}

.brand-wordmark:hover .brand-wordmark-img {
  transform: scale(1.04);
}

[data-theme="dark"] .brand-wordmark-img {
  filter: drop-shadow(0 0 10px rgba(129, 140, 248, 0.75)) brightness(1.25);
}

.brand-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  background: var(--accent-primary-subtle);
  color: var(--accent-primary);
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-active);
  letter-spacing: 0.05em;
}

/* 居中导航目录胶囊 */
.nav-menu-pill {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-subtle);
  padding: 4px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-glass-subtle);
}

.nav-pill-item {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  transition: all var(--transition-smooth);
  position: relative;
  white-space: nowrap;
}

.nav-pill-item:hover {
  color: var(--accent-primary);
  background: var(--accent-primary-subtle);
}

.nav-pill-item.active {
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-primary-hover) 100%);
  box-shadow: 0 2px 10px var(--accent-primary-glow);
}

/* 特色入口：推荐资讯 */
.nav-pill-item.highlight-news {
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-pill-item.highlight-news::after {
  content: "NEW";
  font-size: 0.65rem;
  font-weight: 800;
  padding: 1px 5px;
  background: #ef4444;
  color: #fff;
  border-radius: var(--radius-pill);
  line-height: 1.2;
}

/* 右侧操作区：昼夜切换 + CTA */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-subtle);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  transition: all var(--transition-smooth);
}

.theme-toggle-btn:hover {
  background: var(--accent-primary-subtle);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-spring);
}

.theme-icon-sun { display: block; }
.theme-icon-moon { display: none; }

[data-theme="dark"] .theme-icon-sun { display: none; }
[data-theme="dark"] .theme-icon-moon { display: block; color: var(--accent-primary); }

.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  background: var(--bg-subtle);
}

/* ===================================================================
   高折射毛玻璃卡片与动态光影微交互 (Liquid-light Caustic Shimmer)
   =================================================================== */
.glass-card {
  background: var(--bg-glass-card);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glass);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.glass-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  transition: 0.75s ease;
  pointer-events: none;
  z-index: 1;
}

[data-theme="dark"] .glass-card::before {
  background: linear-gradient(90deg, transparent, rgba(129, 140, 248, 0.25), transparent);
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-active);
}

.glass-card:hover::before {
  left: 200%;
}

/* ===================================================================
   按钮与 CTA 规范 (全站主题色深度融合)
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  transition: all var(--transition-smooth);
  text-align: center;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-primary-hover) 100%);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 16px var(--accent-primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #7c82eb 0%, var(--accent-primary-dark) 100%);
  box-shadow: 0 8px 24px rgba(108, 114, 226, 0.45);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(2px) scale(0.98);
  box-shadow: 0 14px 30px -4px rgba(108, 114, 226, 0.55), 0 0 18px rgba(108, 114, 226, 0.4);
}

.btn-secondary {
  background: var(--bg-glass-card);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: var(--bg-glass-card-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-ambient);
}

.btn-secondary:active {
  transform: translateY(2px) scale(0.98);
}

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

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-block {
  width: 100%;
}

/* 现货库存软玉薄荷徽章 (Soft Jade-Mint Status Pill) */
.stock-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background-color: var(--badge-mint-bg);
  color: var(--badge-mint-text);
  border: 1px solid var(--badge-mint-border);
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.stock-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--badge-mint-text);
  box-shadow: 0 0 8px var(--badge-mint-text);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* ===================================================================
   主视觉区 (Hero Section)
   =================================================================== */
.hero-section {
  padding: 85px 0 65px;
  text-align: center;
  position: relative;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--bg-glass-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-glass);
}

.hero-title {
  font-size: 3.6rem;
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.brand-text-glow {
  background: linear-gradient(135deg, #5b61d4 0%, #7b82f6 50%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  position: relative;
}

[data-theme="dark"] .brand-text-glow {
  background: linear-gradient(135deg, #818cf8 0%, #a5b4fc 50%, #67e8f9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-intro {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 780px;
  margin: 0 auto 36px;
  font-weight: 400;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.hero-guarantee span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-guarantee svg {
  color: #10b981;
}

/* 运行状态指标面板 */
.stats-panel {
  margin-top: 56px;
  padding: 30px 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-box {
  text-align: center;
  padding: 0 16px;
  border-right: 1px solid var(--border-glass-subtle);
}

.stat-box:last-child {
  border-right: none;
}

.stat-num {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent-primary);
  margin-bottom: 4px;
}

.stat-title {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===================================================================
   通用区块排版
   =================================================================== */
.section {
  padding: 95px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}

.section-pill {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  padding: 4px 14px;
  background: var(--accent-primary-subtle);
  border-radius: var(--radius-pill);
}

.section-title {
  font-size: 2.45rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================================================
   核心优势卡片 (3 个图文卡片)
   =================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  padding: 38px 32px;
  display: flex;
  flex-direction: column;
}

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sub);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  background: var(--accent-primary-subtle);
  color: var(--accent-primary);
  border: 1px solid var(--border-active);
}

.feature-card:nth-child(2) .feature-icon-box {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.2);
}

.feature-card:nth-child(3) .feature-icon-box {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.2);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 24px;
  flex-grow: 1;
}

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

.feature-tag-item {
  font-size: 0.78rem;
  padding: 4px 10px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-glass-subtle);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===================================================================
   流媒体与前沿 AI 展卡
   =================================================================== */
.showcase-card {
  padding: 40px;
  display: flex;
  flex-direction: column;
}

.showcase-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.showcase-chip {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
}

.chip-stream {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.chip-ai {
  background: var(--accent-primary-subtle);
  color: var(--accent-primary);
  border: 1px solid var(--border-active);
}

.showcase-title {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.showcase-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 28px;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.matrix-item {
  background: var(--bg-subtle);
  border: 1px solid var(--border-glass-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
  transition: all var(--transition-smooth);
}

.matrix-item:hover {
  background: var(--bg-glass-card-hover);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.matrix-icon {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.matrix-item span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.showcase-checklist {
  margin-top: auto;
  border-top: 1px dashed var(--border-glass-subtle);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checklist-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.checklist-row svg {
  color: #10b981;
  flex-shrink: 0;
}

/* ===================================================================
   套餐价格对比表 (周期切换 + 24px 大圆角)
   =================================================================== */
.pricing-controls {
  display: flex;
  justify-content: center;
  margin-bottom: 48px;
}

.cycle-toggle-wrapper {
  position: relative;
  background: var(--bg-glass-pill);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  padding: 5px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-glass);
}

.cycle-btn {
  position: relative;
  z-index: 2;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 9px 24px;
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  transition: color var(--transition-spring);
  display: flex;
  align-items: center;
  gap: 6px;
}

.cycle-btn.active {
  color: #ffffff;
}

.cycle-slider {
  position: absolute;
  top: 5px;
  left: 5px;
  width: calc(50% - 5px);
  height: calc(100% - 10px);
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-primary-hover) 100%);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px var(--accent-primary-glow);
  z-index: 1;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.cycle-toggle-wrapper[data-cycle="yearly"] .cycle-slider {
  transform: translateX(100%);
}

.discount-tag {
  background: #ef4444;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 1px 6px;
  border-radius: var(--radius-pill);
}

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

.pricing-card {
  padding: 42px 34px;
  display: flex;
  flex-direction: column;
  position: relative;
  border-radius: var(--radius-card);
  overflow: visible;
}

.pricing-card::before {
  display: none;
}

.pricing-card.popular {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-hover);
  transform: scale(1.02);
  z-index: 2;
  background: var(--bg-glass-card-hover);
  overflow: visible;
}

.pricing-card.popular:hover {
  transform: scale(1.02) translateY(-6px);
}

.popular-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-primary-hover) 100%);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.4;
  padding: 4px 18px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px var(--accent-primary-glow);
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
}

.pricing-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.plan-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
}

.plan-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 44px;
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-glass-subtle);
}

.price-symbol {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.price-val {
  font-size: 3.3rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

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

.plan-feature-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 34px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.plan-feature-item svg {
  color: #10b981;
  flex-shrink: 0;
}

.plan-feature-item.muted {
  color: var(--text-muted);
  text-decoration: line-through;
  opacity: 0.55;
}

/* ===================================================================
   用户真实口碑评价 (Reviews)
   =================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.review-body {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
  flex-grow: 1;
}

.review-user-row {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-glass-subtle);
  padding-top: 18px;
}

.review-avatar-circle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--accent-primary) 0%, #06b6d4 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.review-meta {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-primary);
}

.user-title {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===================================================================
   常见问题解答 (FAQ)
   =================================================================== */
.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border-radius: var(--radius-sub);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
}

.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform var(--transition-spring);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
  padding: 0 26px;
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.78;
}

.faq-item.active .faq-answer {
  max-height: 450px;
  padding: 0 26px 24px 26px;
}

/* ===================================================================
   页脚 (Footer)
   =================================================================== */
.site-footer {
  margin-top: 80px;
  padding: 70px 0 45px;
  border-top: 1px solid var(--border-glass-subtle);
  background: var(--bg-glass-card);
  backdrop-filter: blur(20px);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 34px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 4px 0;
  position: relative;
  transition: color var(--transition-smooth);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-glass-subtle);
  padding-top: 28px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* ===================================================================
   资讯页面 / 子页面样式 (Articles & Insights)
   =================================================================== */
.subpage-hero {
  padding: 75px 0 45px;
  text-align: center;
}

.subpage-title {
  font-size: 2.9rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.subpage-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 40px 0 60px;
}

.article-card {
  padding: 30px;
  display: flex;
  flex-direction: column;
}

.article-category {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  padding: 3px 10px;
  background: var(--accent-primary-subtle);
  border-radius: var(--radius-pill);
  align-self: flex-start;
  margin-bottom: 14px;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.45;
}

.article-excerpt {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-glass-subtle);
  padding-top: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===================================================================
   响应式媒体查询 (@media)
   =================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.9rem;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin: 0 auto;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card.popular:hover {
    transform: translateY(-6px);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-wrapper {
    top: 12px;
    padding: 0 12px;
  }

  .floating-nav {
    height: 58px;
    padding: 0 14px;
  }

  .nav-menu-pill {
    position: fixed;
    top: 76px;
    left: 16px;
    right: 16px;
    background: var(--bg-glass-pill);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-card);
    flex-direction: column;
    padding: 16px;
    gap: 8px;
    box-shadow: var(--shadow-hover);
    transform: translateY(-200%);
    transition: transform var(--transition-spring);
    pointer-events: auto;
  }

  .nav-menu-pill.open {
    transform: translateY(0);
  }

  .nav-pill-item {
    width: 100%;
    text-align: center;
    padding: 10px 0;
    font-size: 1rem;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-intro {
    font-size: 1.05rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px;
  }

  .stats-panel {
    grid-template-columns: repeat(2, 1fr);
    padding: 20px 14px;
  }

  .stat-box:nth-child(2) {
    border-right: none;
  }

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

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

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

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

  .btn {
    min-height: 48px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.9rem;
  }

  .stats-panel {
    grid-template-columns: 1fr;
  }

  .stat-box {
    border-right: none;
    border-bottom: 1px solid var(--border-glass-subtle);
    padding-bottom: 14px;
  }

  .stat-box:last-child {
    border-bottom: none;
  }

  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
}

/* ===================================================================
   长篇深度 SEO 科普文章专用样式 (Long-form Depth SEO Articles)
   =================================================================== */
.article-page-wrap {
  padding: 40px 0 80px;
}

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

.article-breadcrumb a:hover {
  color: var(--accent-primary);
}

.article-post-header {
  margin-bottom: 36px;
}

.article-post-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 16px 0;
}

.article-post-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

/* 文章目录 (TOC - Table of Contents) */
.article-toc-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-glass-subtle);
  border-left: 4px solid var(--accent-primary);
  border-radius: var(--radius-sub);
  padding: 24px 28px;
  margin: 32px 0 44px;
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
}

.article-toc-list a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-toc-list a:hover {
  color: var(--accent-primary);
  transform: translateX(4px);
}

/* 正文排版 */
.article-markdown {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.article-markdown h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-glass-subtle);
  letter-spacing: -0.01em;
}

.article-markdown h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px;
}

.article-markdown p {
  margin-bottom: 20px;
}

.article-markdown strong {
  color: var(--text-primary);
}

.article-markdown ul, .article-markdown ol {
  margin-left: 24px;
  margin-bottom: 24px;
}

.article-markdown li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.article-markdown a.internal-seo-link {
  color: var(--accent-primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: opacity var(--transition-fast);
}

.article-markdown a.internal-seo-link:hover {
  opacity: 0.8;
}

/* 比较数据表格 */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glass-subtle);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
  background: var(--bg-glass-card);
}

.article-table th {
  background: var(--bg-subtle);
  color: var(--text-primary);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-glass-subtle);
}

.article-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-glass-subtle);
  color: var(--text-secondary);
}

.article-table tr:last-child td {
  border-bottom: none;
}

.article-table tr:hover td {
  background: var(--bg-glass-card-hover);
}

/* 重点提示框 */
.article-callout {
  background: var(--bg-subtle);
  border-left: 4px solid var(--accent-primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 28px 0;
  font-size: 0.98rem;
  line-height: 1.75;
}

/* 文章内嵌入式 FAQ 模块 */
.article-faq-section {
  margin: 48px 0;
  padding-top: 24px;
  border-top: 1px dashed var(--border-glass-subtle);
}

.article-faq-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
}

/* 相关阅读网格 */
.related-reading-section {
  margin-top: 60px;
  padding-top: 36px;
  border-top: 1px solid var(--border-glass-subtle);
}

.related-reading-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-card {
  padding: 22px;
  display: flex;
  flex-direction: column;
}

.related-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
}

.related-card .read-more {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-top: auto;
}

@media (max-width: 768px) {
  .article-post-title {
    font-size: 1.95rem;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* 子页面通用户头区与文章列表网格 */
.subpage-hero {
  padding: 120px 0 40px;
  text-align: center;
}

.subpage-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.subpage-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.68;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin: 40px 0 60px;
}

.article-card {
  padding: 32px;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: all var(--transition-smooth);
  border: 1px solid var(--border-glass-card);
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  box-shadow: 0 16px 36px var(--shadow-ambient);
}

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

.article-category {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--accent-primary-subtle);
  color: var(--accent-primary);
  border: 1px solid var(--border-active);
  margin-bottom: 16px;
}

.article-card .article-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 12px;
  transition: color var(--transition-fast);
}

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

.article-card .article-excerpt {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.68;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-card .article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-glass-subtle);
  padding-top: 14px;
  margin-top: auto;
}

.article-card .article-meta .read-btn {
  font-weight: 600;
  color: var(--accent-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 900px) {
  .articles-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}