/* ==========================================================================
   狗子云 GouZiYun (gzcloud.sbs) 官方落地页样式表
   风格规范：
   - 指令1: Logo透明背景放去icon
   - 指令2: 极简苹果白（商务、稳定、清爽），背景为浅灰 (#f5f5f7)
   - 规则: 所有框架都改为黑单线 (border: 1px solid #111111)
   ========================================================================== */

:root {
  --bg-main: #f5f5f7;           /* Apple 浅灰背景 */
  --bg-card: #ffffff;           /* 极简纯白卡片 */
  --bg-card-subtle: #fbfbfd;    /* 微妙灰白 */
  --text-main: #111111;         /* 主文字深黑 */
  --text-secondary: #555555;    /* 次级文字 */
  --text-muted: #888888;        /* 弱化文字 */
  --border-black: #111111;      /* 黑单线核心边框 */
  --border-subtle: rgba(17, 17, 17, 0.15); /* 辅助线 */
  --accent-black: #000000;
  --accent-green: #00875a;      /* 在线绿色 */
  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Monaco, Menlo, Consolas, monospace;
  --shadow-subtle: 0 4px 16px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-main);
  color: var(--text-main);
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

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

ul, ol {
  list-style: none;
}

/* 顶部导航栏 (Apple 极简白吸顶，黑单线底部) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-black);
}

.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.brand-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  margin-left: 6px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-item {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.nav-item:hover {
  color: var(--accent-black);
}

.nav-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--accent-black);
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-black);
  transition: all 0.25s ease;
}

.nav-btn-primary:hover {
  background: #ffffff;
  color: var(--text-main);
  transform: translateY(-1px);
  box-shadow: var(--shadow-subtle);
}

/* 移动端菜单按钮 */
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-sm);
  background: #ffffff;
  align-items: center;
  justify-content: center;
}

/* 通用容器 */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 按钮规范 (全部黑单线) */
.btn-black {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--accent-black);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-black);
  transition: all 0.2s ease;
}

.btn-black:hover {
  background: #222222;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-black-line {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  background: #ffffff;
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-black);
  transition: all 0.2s ease;
}

.btn-black-line:hover {
  background: #f0f0f2;
  transform: translateY(-2px);
  box-shadow: var(--shadow-subtle);
}

/* 标签 Badge 规范 (黑单线) */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-main);
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  display: inline-block;
  box-shadow: 0 0 0 3px rgba(0, 135, 90, 0.2);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.9); }
}

/* ==========================================================================
   指令3: H1 HERO 区块 (带有品牌名，极简苹果白商务稳健风格)
   ========================================================================== */
.hero-section {
  padding: 72px 0 84px;
  position: relative;
}

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

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* 指令3: H1 标题需要带有品牌名 */
.hero-h1 {
  font-size: 2.75rem;
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.hero-h1 .brand-highlight {
  display: inline-block;
  position: relative;
  color: #000000;
}

.hero-h1 .brand-highlight::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 4px;
  background: #000000;
  opacity: 0.85;
}

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

.hero-desc strong {
  color: var(--text-main);
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.hero-trust-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-black);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-size: 1.6rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--text-main);
}

.metric-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* Hero 右侧监控卡片 (极简白 + 黑单线) */
.hero-card-board {
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-subtle);
}

.board-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-black);
  margin-bottom: 20px;
}

.board-title {
  font-size: 0.95rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}

.board-node-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.board-node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-black);
  border-radius: var(--radius-md);
  transition: transform 0.2s ease;
}

.board-node-item:hover {
  transform: translateX(4px);
  background: #ffffff;
}

.node-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.node-flag {
  font-size: 1.25rem;
}

.node-name {
  font-size: 0.88rem;
  font-weight: 700;
}

.node-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.node-right {
  text-align: right;
}

.node-ping {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent-green);
}

.node-tag-clean {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 6px;
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: 4px;
}

/* ==========================================================================
   指令4: H2 套餐内容做成动态并排可以滑动的 (全部黑单线)
   ========================================================================== */
.section-wrap {
  padding: 80px 0;
  border-top: 1px solid var(--border-black);
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 40px;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 12px;
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

/* 指令4: H2 标题 */
.section-h2 {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 12px;
}

.section-sub {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* 套餐周期切换控制器 */
.billing-switcher-box {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
}

.switcher-pill {
  display: inline-flex;
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  padding: 4px;
}

.switcher-btn {
  padding: 8px 22px;
  font-size: 0.88rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: all 0.2s;
}

.switcher-btn.active {
  background: var(--accent-black);
  color: #ffffff;
}

/* 套餐滑动控制器导航栏 */
.slider-control-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.slider-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.slider-arrows {
  display: flex;
  gap: 8px;
}

.slider-arrow-btn {
  width: 42px;
  height: 42px;
  border: 1px solid var(--border-black);
  background: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  transition: all 0.2s;
}

.slider-arrow-btn:hover {
  background: var(--accent-black);
  color: #ffffff;
  transform: scale(1.05);
}

/* 动态并排可以滑动的容器 (Horizontal Drag & Scroll Snap) */
.pricing-slider-container {
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 24px;
  scrollbar-width: none; /* 隐藏默认滚动条 */
}

.pricing-slider-container::-webkit-scrollbar {
  display: none;
}

.pricing-cards-track {
  display: flex;
  gap: 24px;
  width: max-content;
  padding: 8px 4px;
}

/* 单张套餐卡片 (黑单线框架，极简白) */
.pricing-card {
  width: 320px;
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  scroll-snap-align: start;
  position: relative;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.pricing-card.featured {
  background: #ffffff;
  border: 2px solid var(--border-black);
}

.popular-badge {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--accent-black);
  color: #ffffff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-black);
  letter-spacing: 0.04em;
}

.card-top {
  margin-bottom: 24px;
}

.plan-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  min-height: 38px;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 18px 0 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-black);
}

.price-symbol {
  font-size: 1.25rem;
  font-weight: 800;
}

.price-number {
  font-size: 2.8rem;
  font-weight: 900;
  font-family: var(--font-mono);
  letter-spacing: -0.04em;
}

.price-cycle {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.feature-item strong {
  color: var(--text-main);
}

.check-icon {
  width: 18px;
  height: 18px;
  border: 1px solid var(--border-black);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  background: #ffffff;
  flex-shrink: 0;
  margin-top: 2px;
}

.plan-cta-btn {
  width: 100%;
  padding: 13px 0;
  text-align: center;
  font-weight: 800;
  font-size: 0.92rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-black);
  background: var(--accent-black);
  color: #ffffff;
  transition: all 0.2s ease;
}

.plan-cta-btn:hover {
  background: #ffffff;
  color: var(--text-main);
  transform: translateY(-2px);
}

/* ==========================================================================
   指令5: H3 文章由上往下 顺序排列可以滑动的 我不要传统滑块的 我要科技感
   - 打造未来主义垂直流式科技仪表盘 (Vertical Kinetic Tech Stream)
   - 结合激光遥测、节点扫描、科技卡片由上往下流畅垂直推流
   ========================================================================== */
.kinetic-articles-terminal {
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-subtle);
  position: relative;
}

.terminal-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-black);
  margin-bottom: 24px;
}

/* 指令5: H3 标题 */
.section-h3 {
  font-size: 1.5rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tech-telemetry-status {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
}

.tech-badge-pass {
  padding: 3px 8px;
  border: 1px solid var(--border-black);
  border-radius: 4px;
  background: var(--bg-card-subtle);
}

/* 垂直滑动控制器 */
.kinetic-stream-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.stream-nav-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  background: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.stream-nav-btn:hover {
  background: var(--accent-black);
  color: #ffffff;
}

/* 科技感垂直卡片滑动视窗 (非传统滑块) */
.kinetic-viewport {
  position: relative;
  height: 520px;
  overflow-y: auto;
  scroll-behavior: smooth;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-md);
  padding: 16px;
  background: var(--bg-main);
  scrollbar-width: thin;
  scrollbar-color: var(--border-black) transparent;
}

.kinetic-stream-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* 单个科技文章流卡片 */
.stream-article-card {
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: all 0.25s ease;
  position: relative;
}

.stream-article-card:hover {
  transform: translateY(-3px) scale(1.005);
  box-shadow: var(--shadow-hover);
  border-color: #000000;
}

.card-tech-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.stream-seq {
  font-weight: 800;
  background: var(--accent-black);
  color: #ffffff;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-black);
}

.stream-keyword-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  background: #ffffff;
}

.stream-title {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--text-main);
}

.stream-title a:hover {
  text-decoration: underline;
}

.stream-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.stream-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(17, 17, 17, 0.1);
  padding-top: 12px;
}

.stream-author-row {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
}

.stream-read-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 5px 14px;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  background: #ffffff;
  color: var(--text-main);
  transition: all 0.2s;
}

.stream-read-btn:hover {
  background: var(--accent-black);
  color: #ffffff;
}

/* ==========================================================================
   指令6: H4 添加用户评价会自动跳转的，右边添加节点测速会自动刷新的
   - 左右双栏联动面板 (Left: Auto-rotating Reviews, Right: Auto-refreshing Speedtest)
   ========================================================================== */
.noc-h4-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

/* 指令6: H4 标题栏 */
.noc-block {
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-black);
  margin-bottom: 22px;
}

.section-h4 {
  font-size: 1.25rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}

.auto-status-indicator {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  background: var(--bg-main);
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
}

/* 左侧：自动轮播用户评价 */
.reviews-slider-box {
  position: relative;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.review-slide-card {
  padding: 20px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-black);
  border-radius: var(--radius-md);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.review-quote {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--text-main);
  font-style: normal;
  margin-bottom: 18px;
}

.review-user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.user-avatar-circle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--border-black);
  border-radius: 50%;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
}

.user-name {
  font-size: 0.92rem;
  font-weight: 800;
}

.user-identity {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.user-plan-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border: 1px solid var(--border-black);
  border-radius: 4px;
  background: #ffffff;
}

/* 轮播进度条与指示点 */
.review-carousel-footer {
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.carousel-dots {
  display: flex;
  gap: 6px;
}

.dot-btn {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--border-black);
  background: #ffffff;
  transition: all 0.2s;
}

.dot-btn.active {
  background: var(--accent-black);
  width: 24px;
  border-radius: var(--radius-full);
}

.auto-timer-bar {
  flex-grow: 1;
  max-width: 160px;
  height: 4px;
  background: rgba(17, 17, 17, 0.1);
  border-radius: 2px;
  overflow: hidden;
  margin-left: 16px;
}

.timer-progress {
  height: 100%;
  width: 0%;
  background: var(--accent-black);
  transition: width 0.1s linear;
}

/* 右侧：自动刷新节点测速仪表盘 */
.speedtest-telemetry-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.speed-table {
  width: 100%;
  border-collapse: collapse;
}

.speed-table th {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--text-muted);
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-black);
}

.speed-table td {
  padding: 10px;
  font-size: 0.85rem;
  border-bottom: 1px solid rgba(17, 17, 17, 0.08);
}

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

.ping-val {
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--accent-green);
}

.bandwidth-val {
  font-family: var(--font-mono);
  font-weight: 800;
  color: #000000;
}

.refresh-action-bar {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.manual-refresh-btn {
  padding: 5px 12px;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  background: #ffffff;
  font-weight: 700;
  font-size: 0.78rem;
  transition: all 0.2s;
}

.manual-refresh-btn:hover {
  background: var(--accent-black);
  color: #ffffff;
}

/* ==========================================================================
   指令7: H5 放常见问题 FAQ 动态并排
   - 动态响应式双栏并排布局，手风琴展开与分类快速筛选
   ========================================================================== */
.faq-filter-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.faq-filter-btn {
  padding: 8px 20px;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  background: #ffffff;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.faq-filter-btn.active, .faq-filter-btn:hover {
  background: var(--accent-black);
  color: #ffffff;
}

/* 动态并排网格 (Side-by-Side Dynamic Grid) */
.faq-dynamic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.faq-card-item {
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  box-shadow: var(--shadow-subtle);
  transition: all 0.25s ease;
}

.faq-card-item:hover {
  box-shadow: var(--shadow-hover);
}

.faq-card-item.active {
  border-color: #000000;
  background: #ffffff;
}

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  text-align: left;
}

/* 指令7: H5 标题放常见问题 */
.faq-h5-title {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-main);
}

.faq-toggle-icon {
  width: 26px;
  height: 26px;
  border: 1px solid var(--border-black);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  flex-shrink: 0;
  transition: transform 0.3s;
  background: var(--bg-main);
}

.faq-card-item.active .faq-toggle-icon {
  transform: rotate(45deg);
  background: var(--accent-black);
  color: #ffffff;
}

.faq-answer-pane {
  display: none;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(17, 17, 17, 0.1);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.faq-card-item.active .faq-answer-pane {
  display: block;
}

/* ==========================================================================
   底部全平台支持与页脚
   ========================================================================== */
.devices-eco-banner {
  margin-top: 60px;
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  box-shadow: var(--shadow-subtle);
}

.devices-h6 {
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 12px;
}

.devices-p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 28px;
}

.devices-icons-flex {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.device-chip {
  padding: 8px 18px;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-full);
  background: var(--bg-card-subtle);
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 页脚 */
.site-footer {
  border-top: 1px solid var(--border-black);
  background: #ffffff;
  padding: 48px 0;
  margin-top: 80px;
}

.footer-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.1rem;
}

.footer-icon {
  width: 28px;
  height: 28px;
}

.footer-intro {
  font-size: 0.88rem;
  color: var(--text-secondary);
  max-width: 640px;
}

.footer-links-row {
  display: flex;
  gap: 24px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.footer-links-row a:hover {
  color: var(--accent-black);
  text-decoration: underline;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(17, 17, 17, 0.1);
  width: 100%;
  padding-top: 20px;
}

/* ==========================================================================
   文章详情页独立样式 (Apple Minimalist Article Style)
   ========================================================================== */
.article-container {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.breadcrumb-bar {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-bar a {
  color: var(--text-secondary);
  font-weight: 600;
}

.breadcrumb-bar a:hover {
  color: #000000;
}

.article-card-main {
  background: #ffffff;
  border: 1px solid var(--border-black);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-subtle);
}

.article-page-h1 {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 16px 0;
  color: var(--text-main);
}

.badge-tag-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.badge-black {
  padding: 3px 10px;
  background: var(--accent-black);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
}

.badge-outline {
  padding: 3px 10px;
  background: #ffffff;
  border: 1px solid var(--border-black);
  color: var(--text-main);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-full);
}

.read-time {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.article-meta-row {
  display: flex;
  gap: 18px;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-black);
  margin-bottom: 32px;
}

.article-body-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #222222;
}

.article-body-content p {
  margin-bottom: 22px;
}

.article-body-content h2 {
  font-size: 1.45rem;
  font-weight: 850;
  margin: 36px 0 16px;
  color: var(--text-main);
  border-left: 4px solid var(--border-black);
  padding-left: 12px;
}

.article-body-content ul, .article-body-content ol {
  margin: 18px 0 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

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

.article-body-content strong {
  color: #000000;
  font-weight: 750;
}

.article-body-content a {
  text-decoration: underline;
  font-weight: 700;
}

.article-cta-box {
  margin: 40px 0;
  padding: 28px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-black);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.cta-text-col h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.cta-text-col p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

.article-nav-links {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
  border-top: 1px solid var(--border-black);
  border-bottom: 1px solid var(--border-black);
  margin: 36px 0;
}

.nav-prev, .nav-next {
  display: flex;
  flex-direction: column;
}

.nav-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
}

.article-nav-links a {
  font-weight: 750;
  font-size: 0.95rem;
  margin-top: 4px;
}

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

.related-articles-section h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 18px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  padding: 16px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-black);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform 0.2s;
}

.related-card:hover {
  transform: translateY(-3px);
  background: #ffffff;
}

.rel-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}

.rel-title {
  font-size: 0.88rem;
  font-weight: 750;
  line-height: 1.4;
}

/* ==========================================================================
   响应式断点适配 (Mobile & Tablet)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .noc-h4-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: 0 16px;
  }
  .nav-menu {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .hero-section {
    padding: 40px 0 60px;
  }
  .hero-h1 {
    font-size: 2rem;
  }
  .section-h2 {
    font-size: 1.7rem;
  }
  .faq-dynamic-grid {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .article-card-main {
    padding: 24px;
  }
  .article-page-h1 {
    font-size: 1.6rem;
  }
  .article-cta-box {
    flex-direction: column;
    align-items: flex-start;
  }
  .article-nav-links {
    flex-direction: column;
    gap: 16px;
  }
}