/* ==========================================================================
   dove加速器 (dovejiasu.mom) - 哑光骨瓷与叠羽云致奢白昼 UI 体系
   Matte-porcelain layered-feather & soft-cloud luxury daylight design
   极致极简、原生高效、零外部依赖、秒开级性能
   ========================================================================== */

/* ---------------- 基础色彩变量体系 ---------------- */
:root {
  /* 默认白天模式 (Daylight Luxury Porcelain) */
  --bg-primary: #fafaf9;              /* 温润珍珠白 (Warm Pearl-White) */
  --bg-secondary: #ffffff;            /* 哑光骨瓷白 (Matte Ceramic-White) */
  --bg-tertiary: #f4f4f5;             /* 极浅骨灰质感层 */
  --bg-elevated: #ffffff;             /* 抬升卡片纯白 */
  --bg-glass: rgba(250, 250, 249, 0.88);/* 顶部微透磨砂珍珠层 */
  --bg-glass-card: rgba(255, 255, 255, 0.92);

  --border-color: #e7e5e4;            /* 细微温润陶瓷线 */
  --border-subtle: #f5f5f4;
  --border-focus: #0ea5e9;

  --text-primary: #1e293b;            /* 深石板炭灰 (Deep Slate-Charcoal) */
  --text-secondary: #475569;          /* 中度石板灰 */
  --text-muted: #64748b;              /* 辅助柔灰 */
  --text-inverse: #ffffff;

  --accent-cyan: #0ea5e9;             /* 柔和天青蓝 (Soft Sky-Cyan) */
  --accent-cyan-hover: #0284c7;
  --accent-cyan-light: rgba(14, 165, 233, 0.08);
  --accent-cyan-glow: rgba(14, 165, 233, 0.22);
  --accent-cyan-gradient: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 100%);

  --brand-navy: #081b5d;              /* DOVE 标志深蓝 */
  --accent-coral: #fc97ab;            /* 标志珊瑚粉 */
  --accent-sky: #2fb1fc;              /* 标志科技天蓝 */
  --accent-green: #10b981;            /* 在线低延迟绿色 */

  /* 哑光骨瓷多层弥散质感阴影 */
  --shadow-porcelain-sm: 0 2px 8px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.02);
  --shadow-porcelain-md: 0 8px 24px -4px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
  --shadow-porcelain-lg: 0 20px 32px -8px rgba(15, 23, 42, 0.08), 0 6px 14px -3px rgba(15, 23, 42, 0.04);
  --shadow-porcelain-hover: 0 24px 38px -6px rgba(14, 165, 233, 0.12), 0 8px 16px -4px rgba(15, 23, 42, 0.05);

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --spring-damping: cubic-bezier(0.34, 1.4, 0.64, 1);
  --transition-normal: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-theme: background 0.35s ease, color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

/* 夜间模式 (Dark Obsidian Porcelain) */
[data-theme="dark"] {
  --bg-primary: #0a0e17;              /* 极深曜石墨蓝 */
  --bg-secondary: #101623;            /* 哑光墨玉层 */
  --bg-tertiary: #172033;
  --bg-elevated: #131b2e;
  --bg-glass: rgba(10, 14, 23, 0.9);
  --bg-glass-card: rgba(19, 27, 46, 0.92);

  --border-color: #1e293b;
  --border-subtle: #162032;
  --border-focus: #38bdf8;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0a0e17;

  --accent-cyan: #38bdf8;
  --accent-cyan-hover: #7dd3fc;
  --accent-cyan-light: rgba(56, 189, 248, 0.12);
  --accent-cyan-glow: rgba(56, 189, 248, 0.28);
  --accent-cyan-gradient: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 100%);

  --shadow-porcelain-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-porcelain-md: 0 10px 28px -4px rgba(0, 0, 0, 0.55);
  --shadow-porcelain-lg: 0 22px 36px -8px rgba(0, 0, 0, 0.7);
  --shadow-porcelain-hover: 0 24px 40px -6px rgba(56, 189, 248, 0.2), 0 0 25px rgba(56, 189, 248, 0.15);
}

/* ---------------- 基础重置与规范 ---------------- */
*, *::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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  letter-spacing: -0.012em;
  transition: var(--transition-theme);
  overflow-x: hidden;
}

/* 锚点跳转平滑补偿，防止吸顶导航栏遮挡标题 */
[id] {
  scroll-margin-top: 96px;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
}

/* ---------------- 通用布局与网格 ---------------- */
.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

.section-title-wrap {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-cyan);
  background: var(--accent-cyan-light);
  border: 1px solid rgba(14, 165, 233, 0.18);
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ---------------- 顶部吸顶导航栏 (Header) ---------------- */
.header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-theme);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

/* 品牌 Logo 标识 */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.brand-logo:hover {
  opacity: 0.92;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(8, 27, 93, 0.28);
  transition: transform 0.25s var(--spring-damping);
  flex-shrink: 0;
}

.brand-logo:hover .brand-icon {
  transform: scale(1.06);
}

.brand-icon svg,
.brand-icon img {
  width: 100%;
  height: 100%;
  display: block;
}

.brand-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 5px;
}

.brand-title-en {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Montserrat", sans-serif;
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.brand-title-zh {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

/* 导航目录 (首页 + 各板块锚点 + 推荐资讯) */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease, transform 0.2s ease;
  position: relative;
  padding: 6px 2px;
}

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

.nav-link.active {
  color: var(--accent-cyan);
  font-weight: 600;
}

/* 推荐资讯特殊微高亮标识 */
.nav-link-badge {
  position: absolute;
  top: -2px;
  right: -12px;
  width: 6px;
  height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent-cyan);
}

/* 导航右侧交互动作 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 精致透明磨砂昼夜切换按钮 */
.theme-toggle-btn {
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--border-color);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition-normal);
  padding: 0;
  outline: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  background: var(--accent-cyan-light);
  color: var(--accent-cyan);
  border-color: var(--border-focus);
  transform: rotate(18deg);
}

.theme-icon-sun,
.theme-icon-moon {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}

[data-theme="light"] .theme-icon-sun { display: none; }
[data-theme="light"] .theme-icon-moon { display: block; }
[data-theme="dark"] .theme-icon-sun { display: block; }
[data-theme="dark"] .theme-icon-moon { display: none; }

/* ---------------- 按钮 (CTA) 规范 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-cyan-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--accent-cyan-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
  box-shadow: 0 6px 20px var(--accent-cyan-glow);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-porcelain-sm);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-focus);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-large {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 9px 18px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

/* ---------------- 主视觉区 (Hero: 骨瓷叠羽与流线云板) ---------------- */
.hero {
  padding: 80px 0 70px;
  position: relative;
  overflow: hidden;
}

/* 柔和环境光晕 */
.hero-glow-soft {
  position: absolute;
  top: -80px;
  right: 10%;
  width: 580px;
  height: 480px;
  background: radial-gradient(circle, var(--accent-cyan-glow) 0%, rgba(14, 165, 233, 0) 70%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 50px;
  position: relative;
  z-index: 1;
}

.hero-left {
  max-width: 640px;
}

.hero-badge-porcelain {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 24px;
  box-shadow: var(--shadow-porcelain-sm);
}

.status-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  display: inline-block;
  animation: pulse-glow 2.4s infinite ease-in-out;
}

@keyframes pulse-glow {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.75; }
}

.hero-title {
  font-size: 3.35rem;
  font-weight: 900;
  line-height: 1.18;
  color: var(--text-primary);
  margin-bottom: 22px;
  letter-spacing: -0.025em;
}

.hero-title .brand-highlight-text {
  color: var(--accent-cyan);
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

/* 核心指标条 (哑光抬升模块) */
.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-porcelain-md);
}

.hero-stat-item {
  text-align: left;
}

.hero-stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1.2;
  margin-bottom: 2px;
}

.hero-stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ---------------- 叠羽扇面抽象艺术板 (Layered-Plumage Fan) ---------------- */
.hero-right-stage {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.feather-fan-container {
  position: relative;
  width: 100%;
  max-width: 460px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* 独立骨瓷羽片条 (Matte-Porcelain Louvers) */
.feather-louver {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 22px;
  box-shadow: var(--shadow-porcelain-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  cursor: pointer;
  transform: translateX(0);
  transition: transform 0.3s var(--spring-damping), box-shadow 0.3s ease, border-color 0.3s ease;
}

/* 叠羽错位自然弧度 (Cascading Wing Louver Offsets) */
.feather-louver:nth-child(1) { margin-left: 0px; z-index: 5; }
.feather-louver:nth-child(2) { margin-left: 20px; z-index: 4; }
.feather-louver:nth-child(3) { margin-left: 40px; z-index: 3; }
.feather-louver:nth-child(4) { margin-left: 20px; z-index: 2; }
.feather-louver:nth-child(5) { margin-left: 0px; z-index: 1; }

/* 鼠标悬停时的微浮起与水波涟漪阻尼效果 (Sequential feather-ripple buoyant lift) */
.feather-louver:hover {
  transform: translateX(-4px) translateY(-2px);
  box-shadow: var(--shadow-porcelain-hover);
  border-color: var(--border-focus);
}

.louver-route-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.louver-badge-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.louver-meta h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.louver-meta span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.louver-ping-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ping-tag {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.08);
  padding: 3px 8px;
  border-radius: var(--radius-xs);
}

.louver-online-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
  transition: transform 0.2s ease;
}

.feather-louver:hover .louver-online-dot {
  transform: scale(1.4);
}

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

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  box-shadow: var(--shadow-porcelain-md);
  transition: transform 0.3s var(--spring-damping), box-shadow 0.3s ease, border-color 0.3s ease;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-porcelain-hover);
  border-color: var(--border-focus);
}

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  background: var(--accent-cyan-light);
  color: var(--accent-cyan);
  border: 1px solid rgba(14, 165, 233, 0.2);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid var(--border-color);
  padding-top: 18px;
}

.feature-tag-item {
  font-size: 0.8rem;
  padding: 4px 10px;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* ---------------- 流媒体 & AI 解锁图卡展示 ---------------- */
.unlock-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.unlock-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  box-shadow: var(--shadow-porcelain-md);
  transition: var(--transition-theme);
}

.unlock-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 26px;
}

.unlock-icon-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #ffffff;
}

.unlock-header h3 {
  font-size: 1.38rem;
  font-weight: 800;
  color: var(--text-primary);
}

.unlock-header p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.service-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.service-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: transform 0.2s var(--spring-damping), background 0.2s ease, border-color 0.2s ease;
}

.service-item:hover {
  background: var(--bg-secondary);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.service-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 800;
  color: #ffffff;
  font-size: 0.95rem;
}

.service-meta h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.service-meta span {
  font-size: 0.78rem;
  color: var(--accent-green);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ---------------- 套餐价格对比表 (参考网上真实价格体系) ---------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-porcelain-md);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.3s var(--spring-damping), box-shadow 0.3s ease, border-color 0.3s ease;
}

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

.pricing-card.featured {
  border-color: var(--accent-cyan);
  box-shadow: 0 16px 36px var(--accent-cyan-glow);
  transform: scale(1.02);
}

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

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-cyan-gradient);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px var(--accent-cyan-glow);
  letter-spacing: 0.04em;
}

.pricing-header {
  text-align: center;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 6px;
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
}

.price-amount {
  font-size: 2.85rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}

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

.plan-discount-note {
  font-size: 0.82rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.pricing-features {
  margin-bottom: 32px;
  flex-grow: 1;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.pricing-features li svg {
  width: 18px;
  height: 18px;
  color: var(--accent-green);
  flex-shrink: 0;
}

.pricing-features li.disabled {
  color: var(--text-muted);
  opacity: 0.6;
}

.pricing-features li.disabled svg {
  color: var(--text-muted);
}

.pricing-card .btn {
  width: 100%;
}

/* ---------------- 用户真实评价 (Testimonials) ---------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-porcelain-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.25s var(--spring-damping);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
}

.stars {
  color: #f59e0b;
  margin-bottom: 16px;
  display: flex;
  gap: 4px;
}

.testimonial-content {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
  font-style: italic;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-cyan-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 700;
  font-size: 1.05rem;
}

.user-info h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.user-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------------- 常见问题解答 (FAQ) ---------------- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-porcelain-sm);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.faq-question {
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: var(--bg-tertiary);
}

.faq-answer p {
  padding: 0 26px 20px 26px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 280px;
}

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

/* ---------------- 底部CTA转化横幅 ---------------- */
.cta-banner {
  margin: 60px 0 20px;
  background: var(--accent-cyan-gradient);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 44px var(--accent-cyan-glow);
}

.cta-banner h2 {
  font-size: 2.35rem;
  font-weight: 900;
  margin-bottom: 16px;
}

.cta-banner p {
  font-size: 1.15rem;
  opacity: 0.95;
  max-width: 660px;
  margin: 0 auto 32px auto;
}

.cta-banner .btn-white {
  background: #ffffff;
  color: #0284c7;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.cta-banner .btn-white:hover {
  background: #f8fafc;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

/* ---------------- 页脚 (Footer) 严格只保留4个标题 ---------------- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0;
  transition: var(--transition-theme);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 22px;
}

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

.footer-nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

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

.footer-copyright {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ---------------- 推荐资讯 (Insights) 专区排版 ---------------- */
.insights-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 36px;
  margin-top: 36px;
}

.insight-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-porcelain-md);
  margin-bottom: 28px;
  transition: transform 0.25s var(--spring-damping), border-color 0.25s ease;
}

.insight-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
}

.insight-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-cyan-light);
  color: var(--accent-cyan);
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.insight-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.35;
}

.insight-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.insight-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.insight-sidebar-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-porcelain-md);
  margin-bottom: 28px;
}

.insight-sidebar-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-list li {
  margin-bottom: 14px;
  line-height: 1.5;
}

.sidebar-list a {
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.sidebar-list a:hover {
  color: var(--accent-cyan);
}

/* ---------------- 内页专用排版样式 (Subpages) ---------------- */
.page-header {
  padding: 60px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.page-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

.page-content-wrapper {
  max-width: 860px;
  margin: 50px auto 80px auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-porcelain-md);
  line-height: 1.8;
}

.page-content-wrapper h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 36px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-content-wrapper h2:first-of-type {
  margin-top: 0;
}

.page-content-wrapper p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1rem;
}

.page-content-wrapper ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}

.page-content-wrapper li {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.page-badge-box {
  background: var(--bg-tertiary);
  border-left: 4px solid var(--accent-cyan);
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.page-badge-box p {
  margin-bottom: 0;
  color: var(--text-primary);
  font-weight: 500;
}

/* 网站地图网格 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 24px;
}

.sitemap-group {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sitemap-group h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-links li {
  list-style: none;
  margin-bottom: 10px;
}

.sitemap-links a {
  color: var(--accent-cyan);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.sitemap-links a:hover {
  text-decoration: underline;
}

/* ---------------- 移动端响应式 (@media) 适配 ---------------- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feather-fan-container {
    max-width: 100%;
  }

  .feather-louver:nth-child(n) {
    margin-left: 0;
  }

  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .unlock-wrapper,
  .insights-layout {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 2.65rem;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  .nav-menu {
    display: none; /* 移动端精简沉浸 */
  }

  .section {
    padding: 55px 0;
  }

  .hero {
    padding: 50px 0 35px;
  }

  .hero-title {
    font-size: 2.15rem;
    line-height: 1.24;
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 28px;
  }

  .hero-stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    padding: 16px;
  }

  .hero-stat-num {
    font-size: 1.4rem;
  }

  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .service-card-grid,
  .sitemap-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }

  .cta-banner {
    padding: 40px 20px;
  }

  .cta-banner h2 {
    font-size: 1.75rem;
  }

  .footer-nav {
    gap: 20px;
  }

  .page-content-wrapper {
    padding: 24px;
    margin: 30px auto 50px auto;
  }

  .page-title {
    font-size: 1.85rem;
  }

  .btn-large {
    width: 100%;
    padding: 14px 24px;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

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

  .article-headline {
    font-size: 1.85rem;
  }
}

/* ---------------- 深度科普与SEO文章专用样式 (Article Layout) ---------------- */
.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

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

.breadcrumb-nav a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.breadcrumb-nav a:hover {
  color: var(--accent-cyan);
}

.breadcrumb-separator {
  color: var(--border-color);
}

.article-header {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 28px;
}

.article-headline {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.32;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

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

.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* 目录卡片 (TOC Box) */
.toc-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-porcelain-sm);
}

.toc-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-list li {
  font-size: 0.95rem;
  line-height: 1.5;
}

.toc-list a {
  color: var(--text-secondary);
  transition: color 0.2s ease, padding-left 0.2s ease;
  display: inline-block;
}

.toc-list a:hover {
  color: var(--accent-cyan);
  padding-left: 4px;
}

.toc-list .toc-sub {
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.article-content h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 44px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  letter-spacing: -0.015em;
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px;
}

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

.article-content strong {
  color: var(--text-primary);
  font-weight: 700;
}

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

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 10px;
  line-height: 1.75;
}

.article-content blockquote {
  background: var(--bg-tertiary);
  border-left: 4px solid var(--accent-cyan);
  padding: 16px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 28px 0;
  font-style: italic;
  color: var(--text-primary);
}

/* 表格规范 */
.article-table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-porcelain-sm);
}

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

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

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

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

.article-table tr:hover td {
  background: rgba(14, 165, 233, 0.03);
}

/* 提示卡片 */
.callout-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin: 28px 0;
  box-shadow: var(--shadow-porcelain-sm);
}

.callout-box.tip {
  border-left: 4px solid var(--accent-green);
}

.callout-box.info {
  border-left: 4px solid var(--accent-cyan);
}

.callout-box.warn {
  border-left: 4px solid #f59e0b;
}

.callout-title {
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 文末 CTA 转化横幅 */
.article-inline-cta {
  background: var(--accent-cyan-gradient);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  text-align: center;
  color: #ffffff;
  margin: 48px 0;
  box-shadow: 0 16px 36px var(--accent-cyan-glow);
}

.article-inline-cta h3 {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #ffffff;
}

.article-inline-cta p {
  font-size: 1rem;
  opacity: 0.95;
  margin-bottom: 22px;
  color: #ffffff;
}

/* FAQ 模块 */
.article-faq-section {
  margin: 48px 0;
  padding-top: 36px;
  border-top: 2px dashed var(--border-color);
}

.article-faq-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 相关阅读模块 */
.related-reading-section {
  margin: 50px 0 30px;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

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

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

.related-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-porcelain-sm);
  transition: transform 0.2s var(--spring-damping), border-color 0.2s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-focus);
}

.related-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 8px;
}

.related-link {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 12px;
}

.related-link:hover {
  color: var(--accent-cyan);
}

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