/* ==========================================================================
   龙猫云 (Totoro.lat) - 暗夜森林漫行者 (Nocturnal Forest-Runner Stealth UI)
   - 核心色板: 暗夜森林黑曜岩 (#090c10)、生物拟态荧光青 (#00ffb3)、神秘金珀眼眸闪光 (#f59e0b)
   - 树冠剪影线框、微光幻影轨迹微交互、静音专线节点瞳光感应
   - 极简极速原生 CSS，零重型框架依赖，完美支持昼夜模式与移动端单栏适配
   ========================================================================== */

/* ---------------- 昼夜模式与主题变量 ---------------- */
:root {
  /* 白天模式 (清晨林雾 Misty Dawn Forest) */
  --bg-primary: #f4f7f6;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8faf9;
  --bg-glass: rgba(244, 247, 246, 0.88);
  --border-color: #e2e8e5;
  --border-hover: #cbd5d0;

  --text-primary: #090c10;
  --text-secondary: #3f4e47;
  --text-muted: #788c82;
  --text-inverse: #ffffff;

  --accent-cyan: #059669;
  --accent-cyan-hover: #047857;
  --accent-amber: #d97706;
  --accent-gradient: linear-gradient(135deg, #059669 0%, #0d9488 50%, #d97706 100%);
  --accent-glow: rgba(5, 150, 105, 0.16);
  --badge-bg: rgba(5, 150, 105, 0.08);
  --badge-text: #047857;

  --canopy-silhouette: rgba(5, 150, 105, 0.04);
  --card-shadow: 0 4px 12px -2px rgba(9, 12, 16, 0.05), 0 2px 4px -2px rgba(9, 12, 16, 0.03);
  --card-shadow-hover: 0 16px 36px -8px rgba(9, 12, 16, 0.12);
  --navbar-shadow: 0 1px 3px 0 rgba(9, 12, 16, 0.04);

  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 黑夜模式 (暗夜黑曜岩与林木微光 Nocturnal Forest Stealth) */
[data-theme="dark"] {
  --bg-primary: #090c10;
  --bg-secondary: #0d1217;
  --bg-card: #121921;
  --bg-card-hover: #17212c;
  --bg-glass: rgba(9, 12, 16, 0.88);
  --border-color: rgba(0, 255, 179, 0.12);
  --border-hover: rgba(0, 255, 179, 0.35);

  --text-primary: #f4f7f6;
  --text-secondary: #9db1a8;
  --text-muted: #5e736a;
  --text-inverse: #090c10;

  --accent-cyan: #00ffb3;
  --accent-cyan-hover: #33ffc2;
  --accent-amber: #f59e0b;
  --accent-gradient: linear-gradient(135deg, #00ffb3 0%, #00d999 50%, #f59e0b 100%);
  --accent-glow: rgba(0, 255, 179, 0.22);
  --badge-bg: rgba(0, 255, 179, 0.12);
  --badge-text: #00ffb3;

  --canopy-silhouette: rgba(0, 255, 179, 0.06);
  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.6);
  --card-shadow-hover: 0 18px 40px -6px rgba(0, 255, 179, 0.15);
  --navbar-shadow: 0 1px 0 rgba(0, 255, 179, 0.1);
}

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

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

/* 为锚点跳转增加舒适的顶部避让边距 */
[id] {
  scroll-margin-top: 5.5rem;
}

body {
  font-family: var(--font-stack);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  transition: background-color 0.35s ease, color 0.35s ease;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* 幻影微光拖尾交互画布 (Phantom Trail Canvas) */
#forestTrailCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 999;
}

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

ul, ol {
  list-style: none;
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

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

/* ---------------- 布局容器 ---------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section {
  padding: 5.5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.95rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--badge-text);
  background-color: var(--badge-bg);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  margin-bottom: 0.95rem;
  letter-spacing: 0.04em;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 850;
  letter-spacing: -0.025em;
  margin-bottom: 1.1rem;
  color: var(--text-primary);
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.12rem;
  color: var(--text-secondary);
}

/* ---------------- 顶部导航栏 (Navbar) ---------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--navbar-shadow);
  transition: var(--transition-smooth);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.6rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo-wrap {
  display: flex;
  align-items: center;
}

.brand-logo {
  height: 2.75rem;
  width: auto;
  max-width: 150px;
  object-fit: contain;
  transition: transform var(--transition-fast);
  display: block;
}

.brand:hover .brand-logo {
  transform: scale(1.05);
}

.logo-light {
  display: block;
}

.logo-dark {
  display: none;
}

[data-theme="dark"] .logo-light {
  display: none;
}

[data-theme="dark"] .logo-dark {
  display: block;
}

.brand-chinese {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.01em;
  padding-left: 0.65rem;
  border-left: 1.5px solid var(--border-color);
  line-height: 1.2;
  transition: border-color var(--transition-smooth);
}

/* 导航链接目录 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav-link {
  font-size: 0.93rem;
  font-weight: 550;
  color: var(--text-secondary);
  position: relative;
  padding: 0.35rem 0.2rem;
  transition: color 0.2s ease;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-cyan);
  transition: width 0.25s ease;
}

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

/* 推荐资讯特别高亮标签 */
.nav-link-news {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-news-dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background-color: var(--accent-amber);
  box-shadow: 0 0 8px var(--accent-amber);
  animation: pulse-amber 2s infinite;
}

@keyframes pulse-amber {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.25); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 昼夜模式切换按钮: 精致透明化、平滑过渡 */
.theme-toggle {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-1px);
}

.theme-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}

.sun-icon {
  display: block;
  opacity: 1;
}

.moon-icon {
  display: none;
  opacity: 0;
}

[data-theme="dark"] .sun-icon {
  display: none;
  opacity: 0;
}

[data-theme="dark"] .moon-icon {
  display: block;
  opacity: 1;
}

/* ---------------- 按钮与呼吁 (CTA Buttons) ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.75rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 650;
  border-radius: 0.65rem;
  transition: var(--transition-smooth);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #090c10 !important;
  font-weight: 750;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px var(--accent-glow);
  transform: translateY(-2px);
  filter: brightness(1.1);
}

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

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

.btn-lg {
  padding: 0.95rem 2.2rem;
  font-size: 1.05rem;
  border-radius: 0.8rem;
}

.btn-block {
  width: 100%;
}

/* ---------------- 主视觉区 (Hero Section) ---------------- */
/* 暗夜林冠与云雾天际线 (Canopy Silhouette & Night Clouds) */
.hero-section {
  padding: 6.5rem 0 5.5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-canopy-horizon {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 180px;
  background-repeat: repeat-x;
  background-position: bottom center;
  background-size: 600px 180px;
  opacity: 0.12;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 600 180' fill='%2300ffb3'%3E%3Cpath d='M0 180h600V120l-30-35-20 20-35-45-25 30-40-55-30 40-30-20-40 45-25-30-35 45-20-20-35 40-30-35-25 30-40-50-35 45-30-30-35 40-20-20-30 40z'/%3E%3C/svg%3E");
}

[data-theme="dark"] .hero-canopy-horizon {
  opacity: 0.22;
}

.hero-glow-bg {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 550px;
  background: radial-gradient(circle, var(--accent-glow) 0%, rgba(9, 12, 16, 0) 70%);
  z-index: 0;
  pointer-events: none;
  opacity: 0.85;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 1.15rem;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 2rem;
  backdrop-filter: blur(8px);
}

.hero-badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulse-cyan 2s infinite;
}

@keyframes pulse-cyan {
  0% { transform: scale(0.85); box-shadow: 0 0 0 0 rgba(0, 255, 179, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(0, 255, 179, 0); }
  100% { transform: scale(0.85); box-shadow: 0 0 0 0 rgba(0, 255, 179, 0); }
}

.hero-headline {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.035em;
  margin-bottom: 1.6rem;
  color: var(--text-primary);
}

.hero-headline .brand-highlight {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  padding-right: 0.15em;
}

.hero-subtitle {
  font-size: 1.22rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 2.8rem auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.35rem;
  margin-bottom: 3.8rem;
}

/* 信任指标栏 (Trust Metrics) */
.hero-trust-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding: 1.85rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.1rem;
  box-shadow: var(--card-shadow);
  max-width: 980px;
  margin: 0 auto;
  position: relative;
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  border-right: 1px solid var(--border-color);
}

.trust-item:last-child {
  border-right: none;
}

.trust-val {
  font-size: 1.75rem;
  font-weight: 850;
  color: var(--text-primary);
  line-height: 1.2;
}

.trust-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
}

/* ---------------- 产品核心优势 (3个图文卡片) ---------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.15rem;
  padding: 2.4rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* 森林神秘瞳光感应 (Ocular Glint) 与闪电光径 (Neon Lightning Path) */
.ocular-glint {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  display: flex;
  gap: 0.45rem;
  opacity: 0;
  transition: opacity 0.35s ease, transform 0.35s ease;
  pointer-events: none;
}

.ocular-glint span {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background-color: var(--accent-amber);
  box-shadow: 0 0 10px 2px var(--accent-amber);
}

.lightning-path {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

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

.feature-card:hover .ocular-glint {
  opacity: 1;
  transform: scale(1.15);
}

.feature-card:hover .lightning-path {
  transform: translateX(100%);
}

.feature-icon-wrapper {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 0.85rem;
  background-color: var(--badge-bg);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrapper {
  background: var(--accent-gradient);
  color: #090c10;
  transform: scale(1.08);
}

.feature-icon-wrapper svg {
  width: 1.85rem;
  height: 1.85rem;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 750;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.35rem;
  flex-grow: 1;
}

.feature-list {
  border-top: 1px dashed var(--border-color);
  padding-top: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.feature-list-item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.feature-list-item svg {
  color: var(--accent-cyan);
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
}

/* ---------------- 流媒体与 AI 支持图卡 ---------------- */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.media-ai-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  padding: 2.6rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.media-ai-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--border-hover);
}

.media-ai-card:hover .ocular-glint {
  opacity: 1;
  transform: scale(1.15);
}

.media-ai-card:hover .lightning-path {
  transform: translateX(100%);
}

.media-ai-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.media-ai-badge-icon {
  width: 3.2rem;
  height: 3.2rem;
  border-radius: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--badge-bg);
  color: var(--accent-cyan);
}

.media-ai-title {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text-primary);
}

.media-ai-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.85rem;
}

.service-pills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.85rem;
}

.service-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.9rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.55rem;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.service-pill:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-1px);
}

.media-ai-checklist {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.35rem;
}

.checklist-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.checklist-row svg {
  color: var(--accent-cyan);
  width: 1.2rem;
  height: 1.2rem;
  flex-shrink: 0;
}

/* ---------------- 套餐价格对比表 (真实参考定价) ---------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.25rem;
  padding: 2.6rem 2rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

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

.pricing-card:hover .ocular-glint {
  opacity: 1;
}

.pricing-card.popular {
  border: 2px solid var(--accent-cyan);
  background-color: var(--bg-card);
}

.popular-badge {
  position: absolute;
  top: 0.9rem;
  right: -2.8rem;
  transform: rotate(45deg);
  background: var(--accent-gradient);
  color: #090c10;
  padding: 0.28rem 3.2rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 4px 10px var(--accent-glow);
}

.pricing-header {
  margin-bottom: 1.5rem;
  text-align: left;
}

.pricing-name {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.45rem;
}

.pricing-tagline {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.pricing-price-box {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  margin: 1.25rem 0 1.5rem 0;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

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

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2.2rem;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-feature-item.highlight {
  font-weight: 650;
  color: var(--text-primary);
}

.pricing-feature-item svg {
  color: var(--accent-cyan);
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
}

/* ---------------- 用户评价 (Testimonials) ---------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.85rem;
}

.testimonial-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.15rem;
  padding: 2.2rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
}

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

.stars-rating {
  color: var(--accent-amber);
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1.1rem;
}

.testimonial-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.6rem;
  flex-grow: 1;
  font-style: italic;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.15rem;
}

.user-avatar {
  width: 2.85rem;
  height: 2.85rem;
  border-radius: 50%;
  background: var(--accent-gradient);
  color: #090c10;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
}

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

.user-name {
  font-size: 0.96rem;
  font-weight: 750;
  color: var(--text-primary);
}

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

/* ---------------- 常见问题解答 (FAQ) ---------------- */
.faq-wrapper {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.9rem;
  overflow: hidden;
  transition: var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  padding: 1.35rem 1.6rem;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--text-primary);
  background-color: transparent;
  cursor: pointer;
  transition: var(--transition-fast);
}

.faq-icon {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--text-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 1.6rem;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 1.6rem 1.35rem 1.6rem;
}

/* ---------------- 底部页脚 (Footer) ---------------- */
/* 规范严格要求: 页脚只保留这四个标题，内容打开新的页面展示 */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3.8rem 0 2.5rem 0;
  position: relative;
}

.footer-nav-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 3.5rem;
  margin-bottom: 2.2rem;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--text-primary);
  position: relative;
  padding: 0.5rem 0;
}

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

.footer-nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-cyan);
  transition: width 0.25s ease;
}

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

.footer-bottom-bar {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

.footer-domain {
  font-weight: 600;
  color: var(--text-secondary);
}

/* ---------------- 次级独立页面与资讯页面专属样式 ---------------- */
.subpage-hero {
  padding: 5rem 0 3.2rem 0;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  position: relative;
}

.subpage-title {
  font-size: 2.6rem;
  font-weight: 850;
  margin-bottom: 0.85rem;
}

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

.subpage-content {
  padding: 4.5rem 0 6.5rem 0;
  max-width: 880px;
  margin: 0 auto;
}

.article-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.15rem;
  padding: 3rem;
  box-shadow: var(--card-shadow);
  margin-bottom: 2.2rem;
  position: relative;
}

.article-card h2 {
  font-size: 1.55rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.6rem;
}

.article-card h3 {
  font-size: 1.22rem;
  font-weight: 700;
  margin: 1.6rem 0 0.8rem 0;
  color: var(--text-primary);
}

.article-card p, .article-card li {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.article-card ul {
  padding-left: 1.35rem;
  list-style: disc;
  margin-bottom: 1.6rem;
}

.highlight-box {
  background-color: var(--badge-bg);
  border-left: 4px solid var(--accent-cyan);
  padding: 1.35rem;
  border-radius: 0.55rem;
  margin: 1.6rem 0;
  color: var(--text-primary);
  font-size: 0.96rem;
}

.back-home-bar {
  margin-bottom: 2.2rem;
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.back-home-link:hover {
  text-decoration: underline;
}

/* ---------------- 深度长文专属排版系统 (SEO Long-form Article Styles) ---------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--text-secondary);
}

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

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

/* 文章目录 (Table of Contents) */
.article-toc {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-cyan);
  border-radius: 0.85rem;
  padding: 1.6rem 2rem;
  margin: 2rem 0 2.5rem 0;
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-toc-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  list-style: none;
  padding-left: 0;
}

.article-toc-item {
  font-size: 0.95rem;
}

.article-toc-item a {
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: var(--transition-fast);
}

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

.article-toc-num {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

/* 文章数据表格 (Technical Data Tables) */
.article-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 1.8rem 0;
  border-radius: 0.75rem;
  border: 1px solid var(--border-color);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

.article-table th {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  padding: 0.9rem 1.2rem;
  font-weight: 750;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.article-table td {
  padding: 0.85rem 1.2rem;
  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-color: var(--bg-card-hover);
}

/* 核心内链高亮 (Internal Link Style) */
.internal-link {
  color: var(--accent-cyan);
  font-weight: 650;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.internal-link:hover {
  color: var(--accent-amber);
}

/* 文章专属 FAQ 区域 */
.article-faq-section {
  margin: 3.5rem 0 2.5rem 0;
  padding-top: 2rem;
  border-top: 2px dashed var(--border-color);
}

.article-faq-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.article-faq-box {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.85rem;
  padding: 1.4rem 1.8rem;
  margin-bottom: 1.2rem;
}

.article-faq-q {
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.article-faq-a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 相关阅读区域 (Related Reading) */
.related-reading-section {
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-color);
}

.related-reading-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.related-reading-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.related-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.85rem;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
}

.related-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  background-color: var(--bg-card-hover);
}

.related-card-tag {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.related-card-title {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.45;
}

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


/* 资讯列表网格与卡片 (News & Insights) */
.news-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.news-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.15rem;
  padding: 2.4rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.news-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--card-shadow-hover);
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.news-card-tag {
  color: var(--badge-text);
  background-color: var(--badge-bg);
  padding: 0.2rem 0.65rem;
  border-radius: 9999px;
  font-weight: 600;
}

.news-card-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
  line-height: 1.35;
}

.news-card-title a:hover {
  color: var(--accent-cyan);
}

.news-card-excerpt {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.news-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  margin-top: auto;
}

.news-card-author {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.news-card-readmore {
  font-size: 0.92rem;
  font-weight: 650;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* 网站地图节点树卡片 */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.sitemap-group {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1.15rem;
  padding: 2.2rem;
}

.sitemap-group-title {
  font-size: 1.3rem;
  font-weight: 750;
  color: var(--text-primary);
  margin-bottom: 1.35rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.sitemap-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.sitemap-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.85rem;
  border-radius: 0.55rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.sitemap-link:hover {
  background-color: var(--bg-card-hover);
  color: var(--accent-cyan);
  padding-left: 1.1rem;
}

/* ---------------- 响应式适配 (Media Queries) ---------------- */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .media-ai-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .nav-menu {
    display: none; /* 移动端顶部保留 Logo 与夜间模式切换及行动按钮 */
  }
}

@media (max-width: 768px) {
  .section {
    padding: 3.8rem 0;
  }

  .hero-headline {
    font-size: 2.45rem;
  }

  .hero-subtitle {
    font-size: 1.08rem;
  }

  .hero-cta-group {
    flex-direction: column;
    gap: 0.95rem;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px; /* 触控手指友好舒适尺寸 */
  }

  .hero-trust-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.35rem;
  }

  .trust-item:nth-child(2) {
    border-right: none;
  }

  .features-grid,
  .pricing-grid,
  .testimonials-grid,
  .sitemap-grid {
    grid-template-columns: 1fr; /* 手机端完美单栏展示 */
  }

  .footer-nav-container {
    flex-direction: column;
    gap: 1.35rem;
  }

  .article-card, .news-card {
    padding: 1.85rem 1.35rem;
  }

  .subpage-title {
    font-size: 1.95rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .hero-trust-bar {
    grid-template-columns: 1fr;
  }

  .trust-item {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.85rem;
  }

  .trust-item:last-child {
    border-bottom: none;
  }

  .pricing-card {
    padding: 2.2rem 1.35rem;
  }

  .brand-logo {
    height: 2.25rem;
    max-width: 120px;
  }

  .brand-chinese {
    font-size: 1.1rem;
    padding-left: 0.45rem;
  }
}