/* ==========================================================================
   蓝胖云 (LanPangYun) - 瑞士包豪斯纯几何排印设计系统
   Swiss-Bauhaus Primary-Geometry Typographic UI
   Palette: Museum White (#ffffff), Carbon Black (#0a0a0c), Cerulean Blue (#0066ff),
            Crimson Red (#ef4444), Bell Yellow (#eab308)
   Layout: Cardless, Shadowless, 1px Datum Lines, Monospace Latency Grid,
           0ms Instantaneous Optical Inversion, Analog Mechanical Stamp Recoil.
   ========================================================================== */

/* --- 变量定义 (默认白天模式: Optical Museum White) --- */
:root {
  --color-bg: #ffffff;
  --color-text: #0a0a0c;
  --color-text-muted: #55555c;
  --color-border: #0a0a0c;
  --color-border-hairline: rgba(10, 10, 12, 0.2);
  
  --color-blue: #0066ff;
  --color-red: #ef4444;
  --color-yellow: #eab308;
  
  --font-grotesk: "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  --datum-line: 1px solid var(--color-border);
  --datum-line-thick: 2px solid var(--color-border);
  --container-max: 1240px;
}

/* --- 夜间模式 (Stark Carbon Black Gallery) --- */
html[data-theme="dark"] {
  --color-bg: #0a0a0c;
  --color-text: #ffffff;
  --color-text-muted: #a1a1aa;
  --color-border: #ffffff;
  --color-border-hairline: rgba(255, 255, 255, 0.25);
}

/* --- 基础规范 --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-grotesk);
  font-size: 16px;
  background-color: var(--color-bg);
  color: var(--color-text);
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.5;
  background-color: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

.mono {
  font-family: var(--font-mono);
}

/* --- 页眉导航栏 (1px Datum Line, 纯几何排版) --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg);
  border-bottom: var(--datum-line-thick);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* 品牌 Logo: 瑞士包豪斯原色几何标志 */
.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.bauhaus-logo-mark {
  display: flex;
  align-items: center;
  gap: 5px;
}

.geo-circle {
  width: 14px;
  height: 14px;
  background: var(--color-blue);
  border-radius: 50%;
}

.geo-bar {
  width: 18px;
  height: 4px;
  background: var(--color-red);
}

.geo-dot {
  width: 7px;
  height: 7px;
  background: var(--color-yellow);
  border-radius: 50%;
}

.brand-text {
  font-weight: 900;
}

.brand-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  border: 1px solid var(--color-border);
  padding: 1px 6px;
  font-weight: 600;
  margin-left: 4px;
}

/* 导航目录 (包含首页、各板块锚点与推荐资讯) */
.nav-menu {
  display: flex;
  align-items: center;
  height: 100%;
}

.nav-item {
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  border-left: var(--datum-line);
  position: relative;
  transition: background-color 0s, color 0s;
}

.nav-item:hover {
  background-color: var(--color-blue);
  color: #ffffff;
}

.nav-item.nav-news {
  background: var(--color-bg);
  color: var(--color-text);
}

.nav-item.nav-news:hover {
  background-color: var(--color-red);
  color: #ffffff;
}

.nav-item-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: var(--color-red);
  color: #ffffff;
  padding: 1px 4px;
  margin-left: 6px;
}

.nav-actions {
  display: flex;
  align-items: center;
  height: 100%;
  border-left: var(--datum-line);
}

/* 精致专业化包豪斯昼夜切换按键 */
.theme-switch-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-right: var(--datum-line);
  background: transparent;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  position: relative;
  transition: background-color 0s, color 0s;
}

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

.theme-btn-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
}

.indicator-symbol {
  width: 10px;
  height: 10px;
  border: 2px solid currentColor;
  border-radius: 50%;
  position: relative;
}

html[data-theme="dark"] .indicator-symbol {
  background-color: currentColor;
}

/* --- 机械打印回弹按键 (Analog Letterpress Mechanical Stamp Recoil) --- */
.btn-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  background: var(--color-bg);
  color: var(--color-text);
  border: 2px solid var(--color-border);
  box-shadow: 4px 4px 0px var(--color-border);
  cursor: pointer;
  transition: transform 0.06s ease, box-shadow 0.06s ease, background-color 0s, color 0s;
  white-space: nowrap;
}

.btn-stamp:hover {
  background-color: var(--color-blue);
  color: #ffffff;
  border-color: var(--color-border);
  box-shadow: 4px 4px 0px var(--color-border);
}

.btn-stamp:active {
  transform: translate(4px, 4px);
  box-shadow: 0px 0px 0px var(--color-border);
}

.btn-stamp.btn-blue {
  background-color: var(--color-blue);
  color: #ffffff;
  border-color: var(--color-border);
}

.btn-stamp.btn-blue:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
}

.btn-nav-cta {
  height: 64px;
  padding: 0 24px;
  border: none;
  box-shadow: none;
  background-color: var(--color-blue);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.btn-nav-cta:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
  box-shadow: none;
}

.btn-nav-cta:active {
  transform: none;
}

/* --- 主视觉区 (Hero Section: 包豪斯巨幅版面) --- */
.hero-section {
  border-bottom: var(--datum-line-thick);
  padding: 80px 0 60px;
  position: relative;
}

.hero-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: var(--datum-line);
  padding-bottom: 12px;
  margin-bottom: 36px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.hero-meta-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hero-meta-badge {
  color: var(--color-bg);
  background: var(--color-blue);
  padding: 2px 8px;
  font-weight: 700;
}

/* 巨幅包豪斯排印标题 */
.hero-colossal-title {
  font-size: clamp(2.4rem, 5.8vw, 4.8rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
  text-transform: uppercase;
}

.hero-sub-title-en {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 1.6vw, 1.3rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-blue);
  margin-bottom: 24px;
  display: block;
}

.hero-brief-box {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  border-top: var(--datum-line);
  padding-top: 28px;
  margin-bottom: 40px;
}

.hero-brief-p {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--color-text);
  font-weight: 500;
}

.hero-cta-wrap {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}

/* 标志性几何构图 + 单色等宽延迟状态表 (Iconic Composition) */
.bauhaus-composition-box {
  border: var(--datum-line-thick);
  padding: 24px;
  margin-top: 32px;
  background: var(--color-bg);
}

.composition-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: var(--datum-line);
}

.geometric-trio {
  display: flex;
  align-items: center;
  gap: 14px;
}

.trio-circle {
  width: 28px;
  height: 28px;
  background-color: var(--color-blue);
  border-radius: 50%;
}

.trio-bar {
  width: 60px;
  height: 6px;
  background-color: var(--color-red);
}

.trio-dot {
  width: 12px;
  height: 12px;
  background-color: var(--color-yellow);
  border-radius: 50%;
}

.composition-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

/* 单色等宽延迟表 (Monospace Latency Table) */
.latency-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background-color: var(--color-border);
  border: 1px solid var(--color-border);
}

.latency-cell {
  background-color: var(--color-bg);
  padding: 14px 16px;
  font-family: var(--font-mono);
  transition: background-color 0s, color 0s;
}

.latency-cell:hover {
  background-color: var(--color-blue);
  color: #ffffff;
}

.latency-node {
  font-size: 0.75rem;
  font-weight: 700;
  display: block;
  margin-bottom: 4px;
  opacity: 0.7;
}

.latency-cell:hover .latency-node {
  opacity: 1;
}

.latency-ping {
  font-size: 1.1rem;
  font-weight: 900;
  display: block;
}

.latency-status {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-blue);
}

.latency-cell:hover .latency-status {
  color: #ffffff;
}

/* --- 通用包豪斯基准章节 --- */
.section-datum {
  border-bottom: var(--datum-line-thick);
}

.section-head-strip {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  border-bottom: var(--datum-line);
}

.section-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 900;
  padding: 20px 24px;
  background-color: var(--color-text);
  color: var(--color-bg);
  display: flex;
  align-items: center;
}

.section-head-main {
  flex-grow: 1;
  padding: 20px 28px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.section-title-grotesk {
  font-size: 1.7rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.section-subtitle-mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* --- 产品核心优势 (3个图文卡片: 无卡片无阴影，纯 1px Datum Grid) --- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-bottom: 0;
}

.adv-block {
  border-right: var(--datum-line);
  padding: 44px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--color-bg);
  position: relative;
  /* 0ms Optical Inversion 微交互 */
  transition: background-color 0s, color 0s, border-color 0s;
}

.adv-block:last-child {
  border-right: none;
}

.adv-block:hover {
  background-color: var(--color-blue) !important;
  color: #ffffff !important;
}

.adv-block:hover .adv-meta,
.adv-block:hover .adv-desc,
.adv-block:hover .adv-specs li {
  color: #ffffff !important;
}

.adv-block:hover .adv-icon-geo {
  border-color: #ffffff !important;
  color: #ffffff !important;
}

.adv-block:hover .adv-tag {
  background-color: #ffffff !important;
  color: var(--color-blue) !important;
}

.adv-top {
  margin-bottom: 32px;
}

.adv-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.adv-tag {
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: 1px 6px;
}

.adv-icon-geo {
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.adv-title {
  font-size: 1.45rem;
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.adv-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.adv-specs {
  border-top: var(--datum-line);
  padding-top: 18px;
  margin-top: 24px;
  list-style: none;
}

.adv-specs li {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
}

/* --- 流媒体图卡 & AI 支持图卡 (双栏对等包豪斯模块) --- */
.showcase-grid-bauhaus {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}

.showcase-panel {
  padding: 44px 36px;
  background-color: var(--color-bg);
  border-right: var(--datum-line);
  display: flex;
  flex-direction: column;
  transition: background-color 0s, color 0s;
}

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

.showcase-panel:hover {
  background-color: var(--color-blue);
  color: #ffffff;
}

.showcase-panel:hover .showcase-desc,
.showcase-panel:hover .service-item-mono {
  color: #ffffff !important;
}

.showcase-panel:hover .service-item-mono {
  border-color: rgba(255, 255, 255, 0.4) !important;
  background-color: rgba(255, 255, 255, 0.1) !important;
}

.showcase-tag-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 18px;
}

.showcase-heading {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.showcase-desc {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 30px;
}

/* 纯几何等宽服务矩阵 (无冗余第三方图标) */
.service-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: auto;
}

.service-item-mono {
  border: 1px solid var(--color-border);
  padding: 12px 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  background-color: var(--color-bg);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.service-sub {
  font-size: 0.68rem;
  font-weight: 500;
  opacity: 0.75;
}

/* --- 套餐价格对比表 (参考网上真实机场/加速器定价，0ms 瞬间反色) --- */
.pricing-matrix-bauhaus {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.pricing-plan-box {
  padding: 48px 36px;
  border-right: var(--datum-line);
  background-color: var(--color-bg);
  display: flex;
  flex-direction: column;
  position: relative;
  /* 0ms 瞬间光学反色 (Zero-latency optical inversion) */
  transition: background-color 0s, color 0s, border-color 0s;
}

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

.pricing-plan-box:hover {
  background-color: var(--color-blue) !important;
  color: #ffffff !important;
}

.pricing-plan-box:hover .plan-period-mono,
.pricing-plan-box:hover .plan-intro-mono,
.pricing-plan-box:hover .spec-row-mono {
  color: #ffffff !important;
}

.pricing-plan-box:hover .spec-row-mono {
  border-color: rgba(255, 255, 255, 0.25) !important;
}

.pricing-plan-box:hover .btn-stamp {
  background-color: #ffffff !important;
  color: var(--color-blue) !important;
  border-color: #ffffff !important;
  box-shadow: 4px 4px 0px #0a0a0c !important;
}

.plan-code-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  display: flex;
  justify-content: space-between;
  margin-bottom: 18px;
}

.plan-badge-flag {
  background: var(--color-red);
  color: #ffffff;
  padding: 1px 6px;
}

.plan-name-grotesk {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.plan-intro-mono {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.plan-price-display {
  display: flex;
  align-items: baseline;
  gap: 6px;
  border-top: var(--datum-line);
  border-bottom: var(--datum-line);
  padding: 18px 0;
  margin-bottom: 28px;
}

.price-currency {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 900;
}

.price-num-hero {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  font-family: var(--font-grotesk);
  letter-spacing: -0.04em;
}

.plan-period-mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.plan-specs-list {
  list-style: none;
  margin-bottom: 36px;
  flex-grow: 1;
}

.spec-row-mono {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border-hairline);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.spec-key {
  opacity: 0.8;
}

.spec-val {
  font-weight: 800;
}

/* --- 用户评价 (Completely free of generic AI avatars, 纯文字排印) --- */
.reviews-grid-bauhaus {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.review-cell {
  padding: 40px 32px;
  border-right: var(--datum-line);
  background-color: var(--color-bg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background-color 0s, color 0s;
}

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

.review-cell:hover {
  background-color: var(--color-blue);
  color: #ffffff;
}

.review-cell:hover .review-quote,
.review-cell:hover .review-meta-mono {
  color: #ffffff !important;
}

.review-index-mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
}

.review-quote {
  font-size: 1.05rem;
  line-height: 1.7;
  font-weight: 600;
  margin-bottom: 28px;
  color: var(--color-text);
}

.review-meta-mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  border-top: var(--datum-line);
  padding-top: 14px;
  color: var(--color-text-muted);
}

.reviewer-name {
  font-weight: 900;
  color: var(--color-text);
  display: block;
}

.review-cell:hover .reviewer-name {
  color: #ffffff;
}

/* --- 常见问题解答 (FAQ) --- */
.faq-grid-bauhaus {
  display: grid;
  grid-template-columns: 1fr;
}

.faq-row {
  border-bottom: var(--datum-line);
  background-color: var(--color-bg);
}

.faq-btn {
  width: 100%;
  padding: 24px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  background: transparent;
  cursor: pointer;
}

.faq-btn:hover {
  background-color: var(--color-blue);
  color: #ffffff;
}

.faq-btn:hover .faq-sign {
  color: #ffffff;
}

.faq-btn-title {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.faq-btn-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  opacity: 0.7;
}

.faq-sign {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  padding: 0 32px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-muted);
}

.faq-row.active .faq-content {
  max-height: 400px;
  padding-bottom: 28px;
}

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

/* --- 底部注册 CTA 巨幅横条 --- */
.footer-cta-strip {
  border-bottom: var(--datum-line-thick);
  background-color: var(--color-blue);
  color: #ffffff;
  padding: 60px 0;
}

.footer-cta-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-cta-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.footer-cta-p {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  margin-top: 8px;
  opacity: 0.9;
}

/* --- 极简专属页脚 (只保留四个指定标题链接) --- */
.site-footer {
  background-color: var(--color-bg);
  padding: 44px 0 36px;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-nav-exact {
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-link-exact {
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: 4px 8px;
  border-bottom: 2px solid transparent;
}

.footer-link-exact:hover {
  background-color: var(--color-blue);
  color: #ffffff;
}

.footer-copyright-mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* --- 独立信息页面专用通用布局 (About, Terms, Privacy, Sitemap, News) --- */
.doc-wrapper {
  padding: 60px 0 90px;
}

.doc-masthead {
  border-bottom: var(--datum-line-thick);
  padding-bottom: 24px;
  margin-bottom: 40px;
}

.doc-cat-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  background-color: var(--color-blue);
  color: #ffffff;
  padding: 2px 8px;
  display: inline-block;
  margin-bottom: 14px;
}

.doc-h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.doc-lead {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.doc-body-grid {
  border: var(--datum-line-thick);
  padding: 48px 40px;
  background-color: var(--color-bg);
}

.doc-section-h2 {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-top: 40px;
  margin-bottom: 16px;
  border-bottom: var(--datum-line);
  padding-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.doc-section-h2:first-of-type {
  margin-top: 0;
}

.doc-p {
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

.doc-list {
  margin-left: 20px;
  margin-bottom: 24px;
  font-size: 1rem;
  line-height: 1.8;
}

.doc-list li {
  margin-bottom: 10px;
}

.bauhaus-notice {
  border: 2px solid var(--color-border);
  padding: 20px 24px;
  margin: 24px 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background-color: var(--color-bg);
}

.notice-red {
  border-color: var(--color-red);
  background-color: rgba(239, 68, 68, 0.05);
}

.notice-blue {
  border-color: var(--color-blue);
  background-color: rgba(0, 102, 255, 0.05);
}

/* 网站地图网格 */
.sitemap-bauhaus-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--color-border);
  border: var(--datum-line);
  margin-top: 24px;
}

.sitemap-col {
  background-color: var(--color-bg);
  padding: 30px;
}

.sitemap-col h3 {
  font-size: 1.2rem;
  font-weight: 900;
  margin-bottom: 16px;
}

.sitemap-link-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.sitemap-link-list a:hover {
  color: var(--color-blue);
  text-decoration: underline;
}

/* 推荐资讯文章专用排版样式 (Article TOC, FAQ, Related Reading) */
.article-breadcrumbs {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-bottom: 20px;
  color: var(--color-text-muted);
}

.article-breadcrumbs a {
  color: var(--color-blue);
}

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

/* 文章目录 (Table of Contents) */
.article-toc-box {
  border: var(--datum-line-thick);
  background-color: var(--color-bg);
  padding: 24px 28px;
  margin: 32px 0 44px;
}

.article-toc-title {
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: var(--datum-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toc-list-bauhaus {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.toc-list-bauhaus li {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.toc-num-tag {
  color: var(--color-blue);
  font-weight: 800;
  font-size: 0.8rem;
}

.toc-list-bauhaus a {
  color: var(--color-text);
  font-weight: 600;
}

.toc-list-bauhaus a:hover {
  color: var(--color-blue);
  text-decoration: underline;
}

/* 文章内置 FAQ */
.article-faq-wrapper {
  margin: 48px 0 36px;
  border-top: var(--datum-line-thick);
  padding-top: 36px;
}

.article-faq-title {
  font-size: 1.6rem;
  font-weight: 900;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-faq-item {
  border: 1px solid var(--color-border);
  margin-bottom: 16px;
  padding: 20px 24px;
  background-color: var(--color-bg);
}

.article-faq-q {
  font-size: 1.1rem;
  font-weight: 850;
  margin-bottom: 10px;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-q-badge {
  background-color: var(--color-blue);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 1px 6px;
}

.article-faq-a {
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* 相关阅读 (Related Reading) */
.related-reading-box {
  margin-top: 50px;
  border-top: var(--datum-line-thick);
  padding-top: 36px;
}

.related-reading-title {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.related-reading-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--color-border);
  border: var(--datum-line);
}

.related-article-card {
  background-color: var(--color-bg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background-color 0s, color 0s;
}

.related-article-card:hover {
  background-color: var(--color-blue);
  color: #ffffff;
}

.related-article-card:hover .related-meta,
.related-article-card:hover .related-desc {
  color: #ffffff !important;
}

.related-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.related-h3 {
  font-size: 1.15rem;
  font-weight: 850;
  margin-bottom: 10px;
  line-height: 1.4;
}

.related-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 资讯中心列表页专用卡片 */
.insights-feed-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background-color: var(--color-border);
  border: var(--datum-line-thick);
  margin-top: 32px;
}

.insight-feed-item {
  background-color: var(--color-bg);
  padding: 36px;
  display: grid;
  grid-template-columns: 200px 1fr 140px;
  gap: 24px;
  align-items: center;
  transition: background-color 0s, color 0s;
}

.insight-feed-item:hover {
  background-color: var(--color-blue);
  color: #ffffff;
}

.insight-feed-item:hover .feed-meta,
.insight-feed-item:hover .feed-p {
  color: #ffffff !important;
}

.insight-feed-item:hover .btn-stamp {
  background-color: #ffffff !important;
  color: var(--color-blue) !important;
  border-color: #ffffff !important;
}

.feed-label-col {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.feed-tag-badge {
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: 2px 8px;
  font-weight: 700;
  width: fit-content;
}

.feed-title-col h2 {
  font-size: 1.4rem;
  font-weight: 900;
  line-height: 1.35;
  margin-bottom: 10px;
}

.feed-p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

@media (max-width: 900px) {
  .insight-feed-item {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .related-reading-grid {
    grid-template-columns: 1fr;
  }
}

/* --- 响应式媒体查询 (@media) --- */
@media (max-width: 1024px) {
  .advantages-grid,
  .pricing-matrix-bauhaus,
  .reviews-grid-bauhaus {
    grid-template-columns: 1fr;
  }
  
  .adv-block,
  .pricing-plan-box,
  .review-cell {
    border-right: none;
    border-bottom: var(--datum-line);
  }

  .showcase-grid-bauhaus {
    grid-template-columns: 1fr;
  }
  
  .showcase-panel {
    border-right: none;
    border-bottom: var(--datum-line);
  }

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

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hero-brief-box {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .hero-meta-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  
  .latency-grid {
    grid-template-columns: 1fr;
  }
  
  .service-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-cta-flex {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer-nav-exact {
    flex-direction: column;
    gap: 18px;
  }
  
  .sitemap-bauhaus-grid {
    grid-template-columns: 1fr;
  }
  
  .doc-body-grid {
    padding: 24px 18px;
  }
}