/* ===================================================================
   Nexitally (奶昔机场) - Swiss Rationalist Proprietary-System Architecture
   Design System: International Typographic Style / Functionalist Monospace Grid
   Palette: Pure Optical White (#ffffff), Stark Ink-Black (#000000), Cerulean Blue (#0055ff)
   Zero Gradients · Zero Radiuses · Zero Frivolous AI Sparks · 0ms Optical Inversion
   Official Domain: https://nexitally.baby
   =================================================================== */

/* ---------------- 基础变量定义 ---------------- */
:root {
  /* 白天模式 (默认) */
  --bg-canvas: #ffffff;
  --bg-surface: #ffffff;
  --bg-subtle: #f7f7f7;
  --text-ink: #000000;
  --text-muted: #555555;
  --text-dim: #888888;
  --border-rigid: #000000;
  --border-hairline: #e2e2e2;
  --cerulean-blue: #0055ff;
  --invert-bg: #000000;
  --invert-text: #ffffff;

  /* 排版字体体系 */
  --font-grotesk: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: "SF Mono", "Consolas", "Liberation Mono", Menlo, Courier, monospace;

  --max-width: 1240px;
  --nav-height: 64px;
}

/* 夜间模式 */
[data-theme="dark"] {
  --bg-canvas: #050505;
  --bg-surface: #0a0a0a;
  --bg-subtle: #121212;
  --text-ink: #ffffff;
  --text-muted: #aaaaaa;
  --text-dim: #666666;
  --border-rigid: #ffffff;
  --border-hairline: #262626;
  --cerulean-blue: #0055ff;
  --invert-bg: #ffffff;
  --invert-text: #000000;
}

/* ---------------- 全局重置与严格瑞士网格规范 ---------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* 彻底移除所有圆角，保持纯粹硬朗的机械工程感 */
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  background-color: var(--bg-canvas);
}

body {
  font-family: var(--font-grotesk);
  background-color: var(--bg-canvas);
  color: var(--text-ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.15s ease, color 0.15s ease;
  overflow-x: hidden;
}

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

/* 标志性点缀：高精度蔚蓝色指示点 */
.cerulean-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background-color: var(--cerulean-blue);
  vertical-align: middle;
  margin-right: 8px;
}

/* 等宽字体类 */
.mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- 顶部导航栏 (Navbar) ---------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 999;
  width: 100%;
  background-color: var(--bg-canvas);
  border-bottom: 1px solid var(--border-rigid);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.brand-logo-img {
  width: 28px;
  height: 28px;
  display: block;
  object-fit: cover;
  border: 1px solid var(--border-rigid);
  flex-shrink: 0;
}

.brand-badge {
  border: 1px solid var(--border-rigid);
  padding: 3px 8px;
  font-size: 0.75rem;
  background: var(--bg-subtle);
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  border-left: 1px solid var(--border-hairline);
  height: 100%;
}

.nav-menu li {
  height: 100%;
  display: flex;
  align-items: center;
  border-right: 1px solid var(--border-hairline);
}

.nav-menu a {
  padding: 0 16px;
  height: 100%;
  display: flex;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: background-color 0ms, color 0ms; /* 0ms 瞬间反相 */
}

.nav-menu a:hover {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.nav-menu a.highlight-news {
  position: relative;
  font-weight: 700;
}

.nav-menu a.highlight-news::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--cerulean-blue);
  margin-right: 6px;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 昼夜切换按钮 (精致工程感理性主义设计) */
.swiss-theme-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-rigid);
  background: var(--bg-canvas);
  color: var(--text-ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 6px 10px;
  cursor: pointer;
  letter-spacing: 0.05em;
  gap: 8px;
  transition: background-color 0ms, color 0ms;
}

.swiss-theme-switch:hover {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.theme-status-indicator {
  width: 6px;
  height: 6px;
  background-color: var(--cerulean-blue);
}

/* 注册 CTA 按钮 (无圆角、无阴影、硬核边框反向) */
.btn-cta-swiss {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 8px 18px;
  border: 1px solid var(--border-rigid);
  background-color: var(--invert-bg);
  color: var(--invert-text);
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background-color 0ms, color 0ms;
}

.btn-cta-swiss:hover {
  background-color: var(--bg-canvas);
  color: var(--text-ink);
}

/* ---------------- 主视觉 Hero 区域 ---------------- */
.hero-swiss {
  border-bottom: 1px solid var(--border-rigid);
  padding: 64px 0 54px;
  position: relative;
}

.hero-telemetry-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 14px;
  margin-bottom: 40px;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  color: var(--text-muted);
}

.hero-headline {
  font-size: 3.4rem;
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  margin-bottom: 24px;
  color: var(--text-ink);
}

.hero-headline span.brand-focus {
  display: inline-block;
  background-color: var(--text-ink);
  color: var(--bg-canvas);
  padding: 0 10px;
  margin-right: 8px;
}

.hero-brief {
  font-size: 1.25rem;
  line-height: 1.6;
  max-width: 900px;
  color: var(--text-muted);
  margin-bottom: 40px;
  font-weight: 400;
}

.hero-actions-grid {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  background-color: var(--text-ink);
  color: var(--bg-canvas);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  border: 2px solid var(--border-rigid);
  cursor: pointer;
  transition: background-color 0ms, color 0ms;
}

.btn-hero-primary:hover {
  background-color: var(--bg-canvas);
  color: var(--text-ink);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background-color: var(--bg-canvas);
  color: var(--text-ink);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  border: 1px solid var(--border-rigid);
  cursor: pointer;
  transition: background-color 0ms, color 0ms;
}

.btn-hero-secondary:hover {
  background-color: var(--text-ink);
  color: var(--bg-canvas);
}

/* 核心遥测指标网格 (无圆角、硬边框、等宽数据) */
.telemetry-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border-rigid);
}

.telemetry-cell {
  padding: 20px 24px;
  border-right: 1px solid var(--border-rigid);
  background: var(--bg-canvas);
  transition: background-color 0ms, color 0ms;
}

.telemetry-cell:last-child {
  border-right: none;
}

.telemetry-cell:hover {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.telemetry-cell:hover .telemetry-label {
  color: var(--invert-text);
}

.telemetry-cell:hover .telemetry-meta {
  color: var(--invert-text);
}

.telemetry-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.telemetry-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.telemetry-meta {
  font-family: var(--font-mono);
  font-size: 0.725rem;
  color: var(--text-muted);
}

/* ---------------- 统一板块标题结构 ---------------- */
.section-swiss {
  border-bottom: 1px solid var(--border-rigid);
  padding: 72px 0;
}

.section-head-swiss {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 2px solid var(--border-rigid);
  padding-bottom: 16px;
  margin-bottom: 36px;
}

.section-head-left h2 {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.section-head-left p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.section-index-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-dim);
}

/* ---------------- 3 大核心优势卡片 ---------------- */
.features-triptych {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border-rigid);
}

.feature-panel {
  padding: 36px 30px;
  border-right: 1px solid var(--border-rigid);
  background: var(--bg-canvas);
  display: flex;
  flex-direction: column;
  transition: background-color 0ms, color 0ms;
}

.feature-panel:last-child {
  border-right: none;
}

.feature-panel:hover {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.feature-panel:hover .feature-num {
  color: var(--invert-text);
  border-color: var(--invert-text);
}

.feature-panel:hover .feature-desc {
  color: var(--invert-text);
}

.feature-panel:hover .feature-param-item {
  border-color: var(--invert-text);
  color: var(--invert-text);
}

.feature-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 8px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.feature-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 24px;
  flex-grow: 1;
}

.feature-params {
  border-top: 1px solid var(--border-hairline);
  padding-top: 16px;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feature-param-item {
  display: flex;
  justify-content: space-between;
}

/* ---------------- 流媒体与 AI 支持图卡 ---------------- */
.dual-system-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border-rigid);
}

.system-card {
  padding: 38px 32px;
  background: var(--bg-canvas);
  border-right: 1px solid var(--border-rigid);
}

.system-card:last-child {
  border-right: none;
}

.system-header {
  border-bottom: 1px solid var(--border-rigid);
  padding-bottom: 16px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.system-header h3 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.system-protocol {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 6px;
  border: 1px solid var(--border-rigid);
}

.system-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.matrix-table th {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-rigid);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-dim);
}

.matrix-table td {
  padding: 10px;
  border-bottom: 1px solid var(--border-hairline);
  transition: background-color 0ms, color 0ms;
}

.matrix-table tr:hover td {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.status-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 6px;
  border: 1px solid var(--border-rigid);
}

/* ---------------- 专线遥测矩阵 (Telemetry Matrix 0ms Inversion) ---------------- */
.telemetry-matrix-wrapper {
  border: 1px solid var(--border-rigid);
  overflow-x: auto;
}

.telemetry-node-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  white-space: nowrap;
}

.telemetry-node-table th {
  background: var(--bg-subtle);
  color: var(--text-dim);
  font-weight: 700;
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-rigid);
  border-right: 1px solid var(--border-hairline);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.telemetry-node-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-hairline);
  border-right: 1px solid var(--border-hairline);
  transition: background-color 0ms, color 0ms;
}

/* 0ms 瞬间光学反相交互规范 */
.telemetry-node-table tbody tr {
  cursor: pointer;
  transition: background-color 0ms, color 0ms;
}

.telemetry-node-table tbody tr:hover {
  background-color: var(--invert-bg) !important;
  color: var(--invert-text) !important;
}

.telemetry-node-table tbody tr:hover td {
  background-color: var(--invert-bg) !important;
  color: var(--invert-text) !important;
  border-color: var(--invert-bg) !important;
}

.live-ping-val {
  font-weight: 700;
}

/* ---------------- 套餐价格表 (参考网上真实价格与硬核边框状态) ---------------- */
.pricing-matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pricing-block {
  border: 1px solid var(--border-rigid);
  background: var(--bg-canvas);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border 0ms;
}

/* 刚性吸附激活态 */
.pricing-block.recommended {
  border: 3px solid var(--border-rigid);
}

.pricing-flag {
  position: absolute;
  top: -12px;
  right: 16px;
  background: var(--text-ink);
  color: var(--bg-canvas);
  font-family: var(--font-mono);
  font-size: 0.725rem;
  font-weight: 800;
  padding: 2px 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-top {
  padding: 28px 24px;
  border-bottom: 1px solid var(--border-rigid);
}

.pricing-tier-name {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.pricing-tier-summary {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.pricing-price-display {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-top: 18px;
  font-family: var(--font-mono);
}

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

.price-integer {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
}

.price-cycle {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.pricing-checklist {
  list-style: none;
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.pricing-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.pricing-action-box {
  padding: 20px 24px;
  border-top: 1px solid var(--border-rigid);
  background: var(--bg-subtle);
}

.btn-purchase-swiss {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 12px 0;
  border: 1px solid var(--border-rigid);
  background-color: var(--text-ink);
  color: var(--bg-canvas);
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: background-color 0ms, color 0ms;
}

.btn-purchase-swiss:hover {
  background-color: var(--bg-canvas);
  color: var(--text-ink);
}

/* ---------------- 用户真实评价 (User Reviews) ---------------- */
.reviews-grid-swiss {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border-rigid);
}

.review-panel {
  padding: 32px 26px;
  border-right: 1px solid var(--border-rigid);
  background: var(--bg-canvas);
  display: flex;
  flex-direction: column;
}

.review-panel:last-child {
  border-right: none;
}

.review-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 8px;
  margin-bottom: 18px;
  display: flex;
  justify-content: space-between;
}

.review-quote {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-ink);
  margin-bottom: 24px;
  flex-grow: 1;
}

.review-signature {
  border-top: 1px solid var(--border-hairline);
  padding-top: 14px;
  font-family: var(--font-mono);
}

.signature-name {
  font-size: 0.85rem;
  font-weight: 800;
}

.signature-role {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ---------------- 常见问题解答 (FAQ) ---------------- */
.faq-grid-swiss {
  border: 1px solid var(--border-rigid);
}

.faq-row {
  border-bottom: 1px solid var(--border-rigid);
  background: var(--bg-canvas);
}

.faq-row:last-child {
  border-bottom: none;
}

.faq-trigger {
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-ink);
  cursor: pointer;
  user-select: none;
  transition: background-color 0ms, color 0ms;
}

.faq-trigger:hover {
  background-color: var(--bg-subtle);
}

.faq-indicator {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  transition: max-height 0.25s ease-out, padding 0.25s ease-out;
}

.faq-row.active .faq-body {
  max-height: 400px;
  padding: 0 24px 22px 24px;
  border-top: 1px solid var(--border-hairline);
}

.faq-row.active .faq-indicator {
  transform: rotate(45deg);
}

/* ---------------- 底部召唤 CTA 区 ---------------- */
.bottom-cta-swiss {
  border-bottom: 1px solid var(--border-rigid);
  padding: 60px 0;
  text-align: center;
  background: var(--bg-subtle);
}

.bottom-cta-swiss h2 {
  font-size: 2.2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.bottom-cta-swiss p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

/* ---------------- 页脚 (严格仅保留要求的4个标题) ---------------- */
.footer-swiss {
  background: var(--bg-canvas);
  padding: 40px 0;
  border-top: 1px solid var(--border-rigid);
}

.footer-nav-swiss {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav-swiss a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-ink);
  letter-spacing: 0.02em;
  padding: 4px 8px;
  border: 1px solid transparent;
  transition: background-color 0ms, color 0ms;
}

.footer-nav-swiss a:hover {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.footer-swiss-copyright {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  color: var(--text-dim);
}

.footer-swiss-copyright a {
  color: var(--text-ink);
  text-decoration: underline;
}

/* ---------------- 子页面与推荐资讯通用结构 ---------------- */
.article-header {
  border-bottom: 1px solid var(--border-rigid);
  padding: 48px 0 36px;
}

.article-category {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.article-title {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.article-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 20px;
}

.article-body {
  padding: 48px 0 72px;
  max-width: 880px;
  margin: 0 auto;
}

.swiss-card-block {
  border: 1px solid var(--border-rigid);
  padding: 32px 28px;
  margin-bottom: 24px;
  background: var(--bg-canvas);
}

.swiss-card-block h2 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 10px;
}

.swiss-card-block p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.swiss-card-block p:last-child {
  margin-bottom: 0;
}

.swiss-card-block ul, .swiss-card-block ol {
  margin: 14px 0 16px 20px;
  color: var(--text-muted);
  font-size: 0.925rem;
  line-height: 1.7;
}

.swiss-card-block li {
  margin-bottom: 6px;
}

/* ---------------- 移动端全响应式适配 (@media) ---------------- */
@media (max-width: 1024px) {
  .hero-headline {
    font-size: 2.75rem;
  }
  .telemetry-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .telemetry-cell:nth-child(2) {
    border-right: none;
  }
  .telemetry-cell:nth-child(1),
  .telemetry-cell:nth-child(2) {
    border-bottom: 1px solid var(--border-rigid);
  }
  .features-triptych {
    grid-template-columns: 1fr;
  }
  .feature-panel {
    border-right: none;
    border-bottom: 1px solid var(--border-rigid);
  }
  .feature-panel:last-child {
    border-bottom: none;
  }
  .pricing-matrix-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid-swiss {
    grid-template-columns: 1fr;
  }
  .review-panel {
    border-right: none;
    border-bottom: 1px solid var(--border-rigid);
  }
  .review-panel:last-child {
    border-bottom: none;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none; /* 移动端折叠，聚焦主要转化入口与资讯 */
  }
  .hero-swiss {
    padding: 40px 0 36px;
  }
  .hero-headline {
    font-size: 2.1rem;
    line-height: 1.15;
  }
  .hero-brief {
    font-size: 1.05rem;
  }
  .hero-actions-grid {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions-grid .btn-hero-primary,
  .hero-actions-grid .btn-hero-secondary {
    width: 100%;
    justify-content: center;
  }
  .dual-system-grid {
    grid-template-columns: 1fr;
  }
  .system-card {
    border-right: none;
    border-bottom: 1px solid var(--border-rigid);
  }
  .telemetry-strip {
    grid-template-columns: 1fr;
  }
  .telemetry-cell {
    border-right: none !important;
    border-bottom: 1px solid var(--border-rigid);
  }
  .telemetry-cell:last-child {
    border-bottom: none;
  }
  .footer-nav-swiss {
    gap: 16px;
  }
}

/* ---------------- SEO 文章与资讯门户增强样式 ---------------- */
/* 目录 (Table of Contents) 容器 */
.toc-card {
  border: 1px solid var(--border-rigid);
  background: var(--bg-subtle);
  padding: 24px;
  margin-bottom: 36px;
}

.toc-header {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 8px;
}

.toc-list {
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-list li a {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-ink);
  padding: 4px 6px;
  transition: background-color 0ms, color 0ms;
}

.toc-list li a:hover {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.toc-list li.nested {
  padding-left: 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 深度科普文章排版强化 */
.article-rich-text {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-ink);
}

.article-rich-text h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-rigid);
  letter-spacing: -0.02em;
}

.article-rich-text h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 28px 0 12px;
  letter-spacing: -0.01em;
}

.article-rich-text p {
  margin-bottom: 20px;
  color: var(--text-ink);
}

.article-rich-text strong {
  font-weight: 700;
}

.article-rich-text ul, .article-rich-text ol {
  margin: 16px 0 24px 24px;
}

.article-rich-text li {
  margin-bottom: 10px;
}

/* 重点内链引用框 */
.inline-brand-callout {
  border: 2px solid var(--border-rigid);
  background: var(--bg-subtle);
  padding: 24px;
  margin: 32px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.inline-brand-callout h4 {
  font-size: 1.15rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}

.inline-brand-callout p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

.inline-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--cerulean-blue);
  text-decoration: underline;
  margin-top: 6px;
}

/* 文章内部 FAQ 区块 */
.article-faq-container {
  margin: 48px 0 40px;
}

.article-faq-title {
  font-size: 1.5rem;
  font-weight: 800;
  border-bottom: 2px solid var(--border-rigid);
  padding-bottom: 12px;
  margin-bottom: 24px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-faq-card {
  border: 1px solid var(--border-rigid);
  margin-bottom: 16px;
  background: var(--bg-canvas);
}

.article-faq-q {
  padding: 18px 20px;
  font-weight: 700;
  font-size: 1.05rem;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-hairline);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-faq-a {
  padding: 20px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.article-faq-a p:last-child {
  margin-bottom: 0;
}

/* 相关阅读 (Related Reading) 网格 */
.related-reading-section {
  margin-top: 56px;
  border-top: 2px solid var(--border-rigid);
  padding-top: 36px;
}

.related-reading-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.related-card {
  border: 1px solid var(--border-rigid);
  padding: 22px 18px;
  background: var(--bg-canvas);
  display: flex;
  flex-direction: column;
  transition: background-color 0ms, color 0ms;
}

.related-card:hover {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.related-card:hover .related-meta {
  color: var(--invert-text);
}

.related-card:hover .related-desc {
  color: var(--invert-text);
}

.related-meta {
  font-family: var(--font-mono);
  font-size: 0.725rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.related-title {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 10px;
}

.related-desc {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex-grow: 1;
}

.related-link-arrow {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  font-weight: 700;
}

/* 推荐资讯门户列表 (insights-feed.html) */
.insights-feed-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 48px;
}

.insight-feed-item {
  border: 1px solid var(--border-rigid);
  padding: 32px 28px;
  background: var(--bg-canvas);
  display: flex;
  flex-direction: column;
  transition: background-color 0ms, color 0ms;
}

.insight-feed-item:hover {
  background-color: var(--invert-bg);
  color: var(--invert-text);
}

.insight-feed-item:hover .feed-meta {
  color: var(--invert-text);
}

.insight-feed-item:hover .feed-excerpt {
  color: var(--invert-text);
}

.insight-feed-item:hover .feed-tag {
  border-color: var(--invert-text);
  color: var(--invert-text);
}

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

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

.feed-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 6px;
  border: 1px solid var(--border-rigid);
}

.feed-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.feed-title {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.feed-excerpt {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.feed-footer-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-hairline);
  padding-top: 14px;
}

@media (max-width: 1024px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}