/* ==========================================================================
   红杏云 (HongXing Cloud) - 先锋新中式建筑美学核心样式表 (Neo-Chinese Architectural)
   Palette: 微水泥粉灰 (#f4f4f2) / 浓墨焦黑 (#0d0d0f) / 破障高压朱砂赤红 (#ff2a2a)
   Layout: 无浮层、无圆角阴影卡片 (Stark, Cardless, Shadowless)、1px 窗棂网格与照壁切分
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量系统 (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* 核心意象色：破障朱砂红 (Vermilion Piercing Red) */
  --vermilion: #ff2a2a;
  --vermilion-hover: #e01b1b;
  --vermilion-dim: rgba(255, 42, 42, 0.08);
  --vermilion-glow: rgba(255, 42, 42, 0.22);
  --vermilion-slash: linear-gradient(90deg, #ff2a2a 0%, rgba(255, 42, 42, 0) 100%);

  /* 白天模式 (默认)：微水泥粉灰与焦墨宣白 */
  --bg-canvas: #f4f4f2;            /* 纯净冷灰微水泥 */
  --bg-wall: #ebebe7;              /* 照壁石阶块面 */
  --bg-wall-elevated: #ffffff;     /* 室内素白面 */
  --bg-glass: rgba(244, 244, 242, 0.92);
  --bg-contrast: #0d0d0f;

  --text-ink: #0d0d0f;             /* 浓墨焦黑 */
  --text-muted: #4b4b54;           /* 灰墨 */
  --text-subtle: #7a7a85;          /* 极浅水墨 */
  --text-inverse: #f4f4f2;

  /* 窗棂网格线 (Razor 1px Lattice Windows Gridlines) */
  --lattice-line: rgba(13, 13, 15, 0.12);
  --lattice-line-bold: rgba(13, 13, 15, 0.28);
  --lattice-red: rgba(255, 42, 42, 0.4);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Songti SC", "SimSun", "Noto Serif SC", "Source Han Serif SC", STSong, Georgia, serif;
  --font-mono: ui-monospace, "SF Mono", "Roboto Mono", Consolas, Menlo, Monaco, monospace;

  --transition-fast: 0.15s ease;
  --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-theme: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;

  --container-max: 1240px;
}

/* 黑夜模式 (Dark Mode)：幽暗玄墨与朱砂裂隙 */
[data-theme="dark"] {
  --bg-canvas: #0a0a0c;            /* 玄墨深渊底色 */
  --bg-wall: #121215;              /* 幽暗石墙 */
  --bg-wall-elevated: #18181d;     /* 照壁微台 */
  --bg-glass: rgba(10, 10, 12, 0.92);
  --bg-contrast: #f4f4f2;

  --text-ink: #f4f4f2;             /* 素白金石字 */
  --text-muted: #9e9ea8;           /* 银灰 */
  --text-subtle: #686873;          /* 幽灰 */
  --text-inverse: #0a0a0c;

  --vermilion: #ff3838;
  --vermilion-dim: rgba(255, 56, 56, 0.14);
  --vermilion-glow: rgba(255, 56, 56, 0.3);

  --lattice-line: rgba(244, 244, 242, 0.1);
  --lattice-line-bold: rgba(244, 244, 242, 0.22);
  --lattice-red: rgba(255, 56, 56, 0.5);
}

/* --------------------------------------------------------------------------
   2. 基础重置 & 全局建筑骨架
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-ink);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  transition: var(--transition-theme);
  overflow-x: hidden;
}

/* 微水泥宣纸质感底衬 (纯 CSS 微粒噪点质感) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(var(--lattice-line) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  opacity: 0.35;
  z-index: 0;
}

/* 顶部朱砂破障光束细线 (The Vermilion Incision Horizon) */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--vermilion);
  z-index: 10000;
  box-shadow: 0 0 12px var(--vermilion);
}

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

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   3. 先锋顶栏导航 (Navbar)
   -------------------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--lattice-line);
  transition: var(--transition-theme);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

/* 品牌 Logo：金石印章意象 + 现代冷峻排版 */
.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--text-ink);
}

.logo-img {
  height: 42px;
  width: auto;
  max-width: 220px;
  display: block;
  object-fit: contain;
  transition: filter var(--transition-fast), transform var(--transition-fast);
}

.logo-brand:hover .logo-img {
  transform: scale(1.02);
}

[data-theme="dark"] .logo-img {
  filter: brightness(1.15) drop-shadow(0 0 1px rgba(255, 255, 255, 0.45));
}

.seal-mark {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--vermilion);
  color: var(--vermilion);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 900;
  line-height: 1;
  position: relative;
  background: var(--vermilion-dim);
}

.seal-mark::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  bottom: 2px;
  border: 0.5px solid var(--vermilion);
  pointer-events: none;
  opacity: 0.6;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 850;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  color: var(--text-subtle);
  text-transform: uppercase;
}

/* 导航链接列表 (包含首页 + 各板块 + 推荐资讯) */
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 550;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 0;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
  letter-spacing: 0.02em;
}

.nav-link:hover {
  color: var(--vermilion);
  background: var(--vermilion-dim);
}

.nav-link.active {
  color: var(--text-ink);
  font-weight: 700;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--vermilion);
}

/* 导航特殊入口：“推荐资讯”高亮标签 */
.nav-link-insight {
  color: var(--vermilion);
  font-weight: 650;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-link-insight::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--vermilion);
  display: inline-block;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.7); }
}

/* 顶栏操作区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 昼夜模式切换按钮 (精致、专业化微水泥透明胶囊) */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--lattice-line);
  background: rgba(125, 125, 125, 0.06);
  color: var(--text-ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  position: relative;
}

.theme-toggle-btn:hover {
  border-color: var(--vermilion);
  background: var(--vermilion-dim);
  color: var(--vermilion);
}

.theme-toggle-btn svg {
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease;
}

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

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--lattice-line);
  align-items: center;
  justify-content: center;
  color: var(--text-ink);
}

/* --------------------------------------------------------------------------
   4. 通用先锋架构按钮 (Stark & Shadowless)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.92rem;
  font-weight: 650;
  padding: 11px 24px;
  border-radius: 0; /* 纯粹建筑几何零圆角 */
  letter-spacing: 0.04em;
  white-space: nowrap;
  user-select: none;
  min-height: 44px;
  position: relative;
  overflow: hidden;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

/* 朱砂高压赤红按钮 */
.btn-vermilion {
  background: var(--vermilion);
  color: #ffffff;
  border: 1px solid var(--vermilion);
}

.btn-vermilion:hover {
  background: var(--vermilion-hover);
  color: #ffffff;
  box-shadow: 0 0 20px var(--vermilion-glow);
}

/* 金石建筑边框按钮 */
.btn-stone {
  background: transparent;
  color: var(--text-ink);
  border: 1px solid var(--lattice-line-bold);
}

.btn-stone:hover {
  border-color: var(--vermilion);
  color: var(--vermilion);
  background: var(--vermilion-dim);
}

.btn-sm {
  font-size: 0.82rem;
  padding: 7px 16px;
  min-height: 38px;
}

.btn-lg {
  font-size: 1.05rem;
  padding: 16px 36px;
  min-height: 52px;
}

.btn-block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   5. 先锋主视觉区 (Hero Section) - 照壁裂隙与破障光道
   -------------------------------------------------------------------------- */
.hero-stucco-wall {
  border-bottom: 1px solid var(--lattice-line);
  padding: 90px 0 70px;
  position: relative;
  background: linear-gradient(180deg, var(--bg-canvas) 0%, var(--bg-wall) 100%);
}

.telemetry-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--text-subtle);
  border: 1px solid var(--lattice-line);
  padding: 6px 14px;
  background: var(--bg-canvas);
  margin-bottom: 28px;
}

.telemetry-pulse {
  width: 7px;
  height: 7px;
  background: var(--vermilion);
  box-shadow: 0 0 8px var(--vermilion);
}

/* 大标题：严格包含当前品牌名“红杏云” */
.hero-headline {
  font-size: clamp(2.4rem, 5.8vw, 4.4rem);
  font-weight: 850;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text-ink);
}

.vermilion-slash-text {
  color: var(--vermilion);
  display: inline;
  position: relative;
}

/* 主视觉区简介 (Lead Introduction) */
.hero-lead-intro {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--text-muted);
  max-width: 820px;
  line-height: 1.75;
  margin-bottom: 40px;
  border-left: 2px solid var(--vermilion);
  padding-left: 20px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

/* 实时遥测网络切片面板 (Architecture Lattice Monospace Telemetry) */
.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--lattice-line);
  background: var(--bg-canvas);
}

.telemetry-cell {
  padding: 20px 22px;
  border-right: 1px solid var(--lattice-line);
  position: relative;
  transition: background var(--transition-fast);
}

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

.telemetry-cell:hover {
  background: var(--vermilion-dim);
}

.telemetry-header {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--text-subtle);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.telemetry-metric {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-ink);
  line-height: 1.2;
}

.telemetry-metric span {
  font-size: 0.85rem;
  color: var(--vermilion);
  margin-left: 4px;
}

.telemetry-status {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --------------------------------------------------------------------------
   6. 通用先锋立面板块 (Monolithic Architectural Sections)
   -------------------------------------------------------------------------- */
.arch-section {
  padding: 95px 0;
  border-bottom: 1px solid var(--lattice-line);
  position: relative;
}

.section-ledger {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--lattice-line);
  padding-bottom: 24px;
  margin-bottom: 48px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-serial {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--vermilion);
  margin-bottom: 6px;
}

.section-heading {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 850;
  letter-spacing: -0.02em;
  color: var(--text-ink);
}

.section-meta-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   7. 产品核心优势 (3个建筑照壁图文体块 - Stark & Cardless)
   -------------------------------------------------------------------------- */
.stucco-triad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--lattice-line);
}

.stucco-block {
  padding: 44px 34px;
  border-right: 1px solid var(--lattice-line);
  background: var(--bg-canvas);
  position: relative;
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

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

/* 破障裂隙光标交互 (Vermilion Fracture Hover) */
.stucco-block:hover {
  background: var(--bg-wall);
}

.stucco-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--vermilion);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.stucco-block:hover::before {
  transform: scaleX(1);
}

.stucco-glyph {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--vermilion);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stucco-code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-subtle);
  border: 1px solid var(--lattice-line);
  padding: 2px 6px;
}

.stucco-title {
  font-size: 1.45rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-ink);
  letter-spacing: -0.01em;
}

.stucco-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 28px;
  flex-grow: 1;
}

.stucco-spec-list {
  border-top: 1px dashed var(--lattice-line);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-subtle);
}

.stucco-spec-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stucco-spec-item span:last-child {
  color: var(--text-ink);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   8. 流媒体图卡 & AI 支持图卡 (双壁对峙格局)
   -------------------------------------------------------------------------- */
.monolith-dual-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid var(--lattice-line);
}

.monolith-card {
  padding: 48px 40px;
  background: var(--bg-canvas);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background var(--transition-fast);
}

.monolith-card:first-child {
  border-right: 1px solid var(--lattice-line);
}

.monolith-card:hover {
  background: var(--bg-wall);
}

.monolith-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--vermilion);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.monolith-tag::before {
  content: "■";
  font-size: 0.65rem;
}

.monolith-title {
  font-size: 1.75rem;
  font-weight: 850;
  margin-bottom: 14px;
  color: var(--text-ink);
  letter-spacing: -0.02em;
}

.monolith-text {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 30px;
}

/* 窗棂格式服务矩阵 (Architectural Matrix) */
.lattice-service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--lattice-line);
  margin-bottom: 32px;
  background: var(--bg-canvas);
}

.lattice-service-cell {
  padding: 14px 12px;
  border-right: 1px solid var(--lattice-line);
  border-bottom: 1px solid var(--lattice-line);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all var(--transition-fast);
}

.lattice-service-cell:nth-child(3n) {
  border-right: none;
}

.lattice-service-cell:nth-last-child(-n+3) {
  border-bottom: none;
}

.lattice-service-cell:hover {
  background: var(--vermilion-dim);
}

.service-code {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--vermilion);
  font-weight: 700;
}

.service-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-ink);
}

.service-sub {
  font-size: 0.75rem;
  color: var(--text-subtle);
}

.monolith-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--lattice-line);
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.monolith-stat {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-subtle);
}

.monolith-stat strong {
  color: var(--vermilion);
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   9. 套餐价格对比表 (参考网上真实主流专线机场价格)
   -------------------------------------------------------------------------- */
.pricing-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--lattice-line);
  background: var(--bg-canvas);
}

.pricing-column {
  padding: 48px 36px;
  border-right: 1px solid var(--lattice-line);
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--bg-canvas);
  transition: background var(--transition-fast);
}

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

/* 旗舰主力款：红杏破障高亮 */
.pricing-column.featured {
  background: var(--bg-wall);
}

.pricing-column.featured::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--vermilion);
}

.featured-flag {
  position: absolute;
  top: 16px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  background: var(--vermilion);
  color: #fff;
  letter-spacing: 0.1em;
}

.plan-tier-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--vermilion);
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}

.plan-title {
  font-size: 1.55rem;
  font-weight: 850;
  color: var(--text-ink);
  margin-bottom: 10px;
}

.plan-summary {
  font-size: 0.9rem;
  color: var(--text-muted);
  min-height: 44px;
  line-height: 1.6;
  margin-bottom: 28px;
}

.plan-cost-lock {
  border-top: 1px solid var(--lattice-line);
  border-bottom: 1px solid var(--lattice-line);
  padding: 22px 0;
  margin-bottom: 30px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.cost-symbol {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-ink);
}

.cost-number {
  font-family: var(--font-mono);
  font-size: 3.4rem;
  font-weight: 850;
  line-height: 1;
  color: var(--text-ink);
  letter-spacing: -0.04em;
}

.cost-cycle {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-subtle);
  margin-left: 4px;
}

.plan-manifest {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
  flex-grow: 1;
}

.manifest-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.manifest-item strong {
  color: var(--text-ink);
}

.manifest-dot {
  width: 5px;
  height: 5px;
  background: var(--vermilion);
  margin-top: 7px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   10. 用户评价 (严谨真实口碑见证)
   -------------------------------------------------------------------------- */
.reviews-grid-arch {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid var(--lattice-line);
  background: var(--bg-canvas);
}

.review-cell {
  padding: 40px 36px;
  border-right: 1px solid var(--lattice-line);
  border-bottom: 1px solid var(--lattice-line);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background var(--transition-fast);
}

.review-cell:nth-child(2n) {
  border-right: none;
}

.review-cell:nth-last-child(-n+2) {
  border-bottom: none;
}

.review-cell:hover {
  background: var(--bg-wall);
}

.review-rating-line {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--vermilion);
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.review-quote {
  font-size: 1.02rem;
  color: var(--text-ink);
  line-height: 1.75;
  margin-bottom: 24px;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px dashed var(--lattice-line);
  padding-top: 16px;
}

.reviewer-name {
  font-weight: 750;
  font-size: 0.95rem;
}

.reviewer-role {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-subtle);
}

/* --------------------------------------------------------------------------
   11. 常见问题解答 (FAQ) - 窗棂式纯粹展开
   -------------------------------------------------------------------------- */
.faq-monolith-list {
  border: 1px solid var(--lattice-line);
  background: var(--bg-canvas);
}

.faq-row {
  border-bottom: 1px solid var(--lattice-line);
  transition: background var(--transition-fast);
}

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

.faq-trigger {
  width: 100%;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-ink);
  text-align: left;
  gap: 16px;
  transition: color var(--transition-fast);
}

.faq-trigger:hover {
  color: var(--vermilion);
}

.faq-indicator {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--vermilion);
  transition: transform 0.3s ease;
}

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

.faq-content-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s ease;
  padding: 0 28px;
  font-size: 0.96rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.faq-row.active .faq-content-body {
  max-height: 280px;
  padding: 0 28px 24px;
}

/* --------------------------------------------------------------------------
   12. 转化呼吁条 (Final Wall-Cleaving CTA)
   -------------------------------------------------------------------------- */
.cta-cleaving-block {
  border: 1px solid var(--lattice-line);
  background: var(--bg-wall);
  padding: 70px 48px;
  margin: 60px 0 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-cleaving-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 2px;
  background: var(--vermilion);
  box-shadow: 0 0 12px var(--vermilion);
}

.cta-cleaving-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 850;
  margin-bottom: 16px;
}

.cta-cleaving-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 36px;
}

/* --------------------------------------------------------------------------
   13. 页脚 (Footer - 严格只保留四个指定标题，新窗口打开)
   -------------------------------------------------------------------------- */
.footer-arch {
  background: var(--bg-canvas);
  border-top: 1px solid var(--lattice-line);
  padding: 56px 0 40px;
  text-align: center;
}

.footer-nav-arch {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.footer-nav-arch a {
  font-size: 0.95rem;
  font-weight: 650;
  color: var(--text-muted);
  padding: 6px 12px;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.footer-nav-arch a:hover {
  color: var(--vermilion);
  border-color: var(--vermilion);
  background: var(--vermilion-dim);
}

.footer-signature {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-subtle);
  border-top: 1px solid var(--lattice-line);
  padding-top: 24px;
  max-width: 620px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   14. 推荐资讯专页 (Insights Architecture)
   -------------------------------------------------------------------------- */
.article-grid-arch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--lattice-line);
  background: var(--bg-canvas);
}

.article-item-card {
  padding: 38px 30px;
  border-right: 1px solid var(--lattice-line);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background var(--transition-fast);
}

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

.article-item-card:hover {
  background: var(--bg-wall);
}

.article-meta-time {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--vermilion);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.article-item-title {
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 14px;
  color: var(--text-ink);
}

.article-item-summary {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 24px;
  flex-grow: 1;
}

/* --------------------------------------------------------------------------
   15. 响应式断点适配 (@media)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .stucco-triad-grid {
    grid-template-columns: 1fr;
  }
  .stucco-block {
    border-right: none;
    border-bottom: 1px solid var(--lattice-line);
  }
  .stucco-block:last-child {
    border-bottom: none;
  }

  .monolith-dual-grid {
    grid-template-columns: 1fr;
  }
  .monolith-card:first-child {
    border-right: none;
    border-bottom: 1px solid var(--lattice-line);
  }

  .pricing-matrix {
    grid-template-columns: 1fr;
  }
  .pricing-column {
    border-right: none;
    border-bottom: 1px solid var(--lattice-line);
  }
  .pricing-column:last-child {
    border-bottom: none;
  }

  .telemetry-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .telemetry-cell:nth-child(2) {
    border-right: none;
  }
  .telemetry-cell:nth-child(-n+2) {
    border-bottom: 1px solid var(--lattice-line);
  }

  .article-grid-arch {
    grid-template-columns: 1fr;
  }
  .article-item-card {
    border-right: none;
    border-bottom: 1px solid var(--lattice-line);
  }
  .article-item-card:last-child {
    border-bottom: none;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: var(--bg-canvas);
    border-bottom: 1px solid var(--lattice-line);
    flex-direction: column;
    padding: 16px 20px;
    gap: 4px;
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .reviews-grid-arch {
    grid-template-columns: 1fr;
  }
  .review-cell {
    border-right: none !important;
  }
  .review-cell:not(:last-child) {
    border-bottom: 1px solid var(--lattice-line);
  }

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

  .hero-headline {
    font-size: 2.1rem;
  }

  .telemetry-grid {
    grid-template-columns: 1fr;
  }
  .telemetry-cell {
    border-right: none !important;
    border-bottom: 1px solid var(--lattice-line);
  }
  .telemetry-cell:last-child {
    border-bottom: none;
  }

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

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

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-toc-sticky {
    position: static;
    margin-bottom: 30px;
  }
}

/* --------------------------------------------------------------------------
   16. SEO 深度长篇科普文章专区 (Article Typography & Layout)
   -------------------------------------------------------------------------- */
.article-page-header {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--lattice-line);
  background: var(--bg-wall);
}

.article-breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-subtle);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.article-breadcrumb a:hover {
  color: var(--vermilion);
}

.article-main-title {
  font-size: clamp(1.8rem, 3.8vw, 2.7rem);
  font-weight: 850;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-ink);
  margin-bottom: 18px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-subtle);
  flex-wrap: wrap;
}

.article-tag-badge {
  background: var(--vermilion-dim);
  color: var(--vermilion);
  padding: 3px 8px;
  border: 1px solid var(--vermilion);
  font-weight: 600;
}

.article-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  padding: 60px 0 80px;
  align-items: start;
}

/* 粘性文章目录 (Table of Contents) */
.article-toc-sticky {
  position: sticky;
  top: 90px;
  border: 1px solid var(--lattice-line);
  background: var(--bg-canvas);
  padding: 24px;
}

.article-toc-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--vermilion);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-toc-title::before {
  content: "§";
  font-size: 1rem;
}

.article-toc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
}

.article-toc-item a {
  color: var(--text-muted);
  line-height: 1.45;
  display: block;
  transition: color var(--transition-fast), padding var(--transition-fast);
}

.article-toc-item a:hover {
  color: var(--vermilion);
  padding-left: 4px;
}

/* 文章正文排版 */
.article-body-content {
  color: var(--text-ink);
  font-size: 1.02rem;
  line-height: 1.85;
}

.article-body-content h2 {
  font-size: 1.6rem;
  font-weight: 850;
  margin: 44px 0 18px;
  color: var(--text-ink);
  border-left: 3px solid var(--vermilion);
  padding-left: 14px;
  letter-spacing: -0.01em;
}

.article-body-content h2:first-of-type {
  margin-top: 0;
}

.article-body-content h3 {
  font-size: 1.25rem;
  font-weight: 750;
  margin: 28px 0 12px;
  color: var(--text-ink);
}

.article-body-content p {
  color: var(--text-muted);
  margin-bottom: 20px;
  text-align: justify;
}

.article-body-content ul, .article-body-content ol {
  margin: 0 0 24px 24px;
  color: var(--text-muted);
}

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

.article-callout {
  border: 1px solid var(--lattice-line);
  background: var(--bg-wall);
  border-left: 3px solid var(--vermilion);
  padding: 20px 24px;
  margin: 28px 0;
}

.article-callout-title {
  font-weight: 750;
  color: var(--text-ink);
  margin-bottom: 8px;
  font-size: 0.96rem;
}

.article-callout p {
  margin-bottom: 0;
  font-size: 0.92rem;
}

/* 对比表格 */
.article-table-wrap {
  overflow-x: auto;
  margin: 30px 0;
  border: 1px solid var(--lattice-line);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--bg-canvas);
}

.article-table th {
  background: var(--bg-wall);
  color: var(--text-ink);
  font-weight: 750;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--lattice-line);
}

.article-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--lattice-line);
  color: var(--text-muted);
}

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

/* 内链高亮样式 */
.seo-internal-link {
  color: var(--vermilion);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: opacity var(--transition-fast);
}

.seo-internal-link:hover {
  opacity: 0.8;
}

/* 文章内置 FAQ */
.article-faq-section {
  margin-top: 50px;
  border-top: 1px solid var(--lattice-line);
  padding-top: 40px;
}

.article-faq-title {
  font-size: 1.45rem;
  font-weight: 850;
  margin-bottom: 24px;
  color: var(--text-ink);
}

.article-faq-card {
  border: 1px solid var(--lattice-line);
  background: var(--bg-canvas);
  padding: 20px 24px;
  margin-bottom: 16px;
}

.article-faq-q {
  font-weight: 750;
  color: var(--text-ink);
  margin-bottom: 10px;
  font-size: 1.02rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-faq-q::before {
  content: "Q:";
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-weight: 800;
}

.article-faq-a {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 0 !important;
}

/* 文章相关阅读 (Related Reading) */
.related-reading-section {
  margin-top: 60px;
  border-top: 1px solid var(--lattice-line);
  padding-top: 44px;
}

.related-reading-heading {
  font-size: 1.35rem;
  font-weight: 850;
  margin-bottom: 24px;
  color: var(--text-ink);
}

.related-reading-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.related-card {
  border: 1px solid var(--lattice-line);
  background: var(--bg-wall);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.related-card:hover {
  border-color: var(--vermilion);
  background: var(--bg-canvas);
}

.related-card-title {
  font-size: 1.05rem;
  font-weight: 750;
  color: var(--text-ink);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card-desc {
  font-size: 0.86rem;
  color: var(--text-subtle);
  line-height: 1.6;
  margin-bottom: 14px;
}

.related-card-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--vermilion);
}

@media (max-width: 768px) {
  .related-reading-grid {
    grid-template-columns: 1fr;
  }
}