/* ==========================================================================
   DUCATI TELEMETRY DESIGN SYSTEM: Carbon Nero (碳纤黑)
   精密工程控制台视觉规范 - 纯原生 CSS，零重型框架，秒开体验
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Space+Grotesk:wght@500;700&display=swap');

:root {
  --bg-carbon: #0D0D0D;
  --bg-panel: #121212;
  --bg-panel-elevated: #161616;
  --border-hairline: #1B1B1B;
  --border-active: #2A2A2A;
  --accent-acid: #D6F32F;
  --accent-acid-dim: rgba(214, 243, 47, 0.15);
  --accent-acid-border: rgba(214, 243, 47, 0.4);
  --text-white: #F2F2EE;
  --text-dim: #7E807A;
  --text-muted: #4A4D46;
  --danger-red: #FF3344;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* 强制零圆角，符合精密工程控制台风格 */
}

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

body {
  font-family: var(--font-mono);
  background-color: var(--bg-carbon);
  /* 4% 不透明度 45° 碳纤维微细网纹 */
  background-image: 
    linear-gradient(45deg, rgba(255, 255, 255, 0.04) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.04) 75%),
    linear-gradient(45deg, rgba(255, 255, 255, 0.04) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.04) 75%);
  background-size: 8px 8px;
  background-position: 0 0, 4px 4px;
  color: var(--text-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* 链接样式 */
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

/* 顶部跑马灯遥测提示 */
.telemetry-ticker {
  background: #090909;
  border-bottom: 1px solid var(--border-hairline);
  padding: 6px 16px;
  font-size: 0.75rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  align-items: center;
  overflow: hidden;
}

.ticker-content {
  display: flex;
  gap: 24px;
  align-items: center;
  white-space: nowrap;
}

.ticker-live-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent-acid);
  margin-right: 6px;
}

/* 统一布局容器 - 严密 12 列网格基底 */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 八边形切角面板工具类 */
.cut-corner-box {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  position: relative;
  clip-path: polygon(
    10px 0%, 
    calc(100% - 10px) 0%, 
    100% 10px, 
    100% calc(100% - 10px), 
    calc(100% - 10px) 100%, 
    10px 100%, 
    0% calc(100% - 10px), 
    0% 10px
  );
}

.cut-corner-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px solid var(--border-hairline);
  pointer-events: none;
  clip-path: inherit;
}

/* 刻度线装饰 */
.gauge-ticks {
  position: relative;
}
.gauge-ticks::after {
  content: "||||||||||||||||||||";
  position: absolute;
  right: 12px;
  top: 8px;
  font-size: 0.6rem;
  letter-spacing: 2px;
  color: var(--text-muted);
}

/* 标签通用类 */
.spec-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--accent-acid);
  letter-spacing: 1.5px;
  display: inline-block;
  margin-bottom: 8px;
}

.meta-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ==========================================================================
   页眉导航 (Site Header)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 13, 13, 0.95);
  border-bottom: 1px solid var(--border-hairline);
  backdrop-filter: blur(8px);
}

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

/* 切角六边板 Logo，内嵌酸性绿几何字母 D */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 1px;
  color: var(--text-white);
}

.logo-badge {
  width: 36px;
  height: 36px;
  background: #141414;
  border: 1px solid var(--border-active);
  clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-letter-d {
  width: 14px;
  height: 16px;
  border: 3.5px solid var(--accent-acid);
  border-left: 4.5px solid var(--accent-acid);
  border-top-right-radius: 8px !important;
  border-bottom-right-radius: 8px !important;
  display: inline-block;
}

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

.logo-brand-text .title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 2px;
}

.logo-brand-text .sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--accent-acid);
  letter-spacing: 1px;
}

/* 导航链接 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.82rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 6px 0;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-white);
}

.nav-link.active::after, .nav-link:hover::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-acid);
}

.nav-link-intel {
  color: var(--accent-acid);
  border: 1px solid var(--accent-acid-border);
  padding: 4px 10px;
  background: var(--accent-acid-dim);
}

.nav-link-intel:hover {
  background: var(--accent-acid);
  color: #000;
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 10px 20px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  white-space: nowrap;
}

/* 主按钮：酸性荧光绿强调，黑字，切角 */
.btn-acid {
  background: var(--accent-acid);
  color: #0D0D0D;
  border: 1px solid var(--accent-acid);
  clip-path: polygon(6px 0%, calc(100% - 6px) 0%, 100% 6px, 100% calc(100% - 6px), calc(100% - 6px) 100%, 6px 100%, 0% calc(100% - 6px), 0% 6px);
}

.btn-acid:hover {
  background: #E8FF42;
  color: #000;
  transform: translateY(-1px);
}

/* 次级按钮：线框深黑底 */
.btn-outline {
  background: #141414;
  color: var(--text-white);
  border: 1px solid var(--border-active);
  clip-path: polygon(6px 0%, calc(100% - 6px) 0%, 100% 6px, 100% calc(100% - 6px), calc(100% - 6px) 100%, 6px 100%, 0% calc(100% - 6px), 0% 6px);
}

.btn-outline:hover {
  border-color: var(--accent-acid);
  color: var(--accent-acid);
  background: #1A1A1A;
}

/* 博客链接专用按钮（Hero内，纯dofollow传递权重） */
.btn-blog-dofollow {
  background: #181915;
  color: var(--accent-acid);
  border: 1px solid var(--accent-acid-border);
  clip-path: polygon(6px 0%, calc(100% - 6px) 0%, 100% 6px, 100% calc(100% - 6px), calc(100% - 6px) 100%, 6px 100%, 0% calc(100% - 6px), 0% 6px);
}

.btn-blog-dofollow:hover {
  background: var(--accent-acid);
  color: #000;
  border-color: var(--accent-acid);
}

/* ==========================================================================
   主视觉区 (Hero Section)
   ========================================================================== */
.hero-section {
  padding: 60px 0 50px;
  border-bottom: 1px solid var(--border-hairline);
  position: relative;
}

.hero-telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 12px;
  margin-bottom: 36px;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 36px;
  align-items: center;
}

.hero-content h1 {
  font-family: var(--font-display);
  font-size: 2.85rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  color: var(--text-white);
  margin-bottom: 20px;
}

.hero-content h1 .brand-highlight {
  color: var(--accent-acid);
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 30px;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-actions .btn {
  padding: 13px 26px;
  font-size: 0.9rem;
}

/* 遥测读数数据条 */
.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  border-top: 1px solid var(--border-hairline);
  padding-top: 24px;
}

.stat-item {
  border-left: 2px solid var(--border-active);
  padding-left: 12px;
}

.stat-item.active-stat {
  border-left-color: var(--accent-acid);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.1;
}

.stat-value.acid {
  color: var(--accent-acid);
}

.stat-unit {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-dim);
  margin-left: 2px;
}

.stat-label {
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-top: 4px;
  letter-spacing: 0.5px;
}

/* Hero 右侧车队控制台 HUD 仿真卡片 */
.telemetry-console-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  padding: 24px;
  position: relative;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
}

.console-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 12px;
  margin-bottom: 18px;
}

.console-title {
  font-size: 0.75rem;
  letter-spacing: 1.5px;
  color: var(--text-white);
  font-weight: 600;
}

.ping-monitor-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.ping-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #0D0D0D;
  border: 1px solid var(--border-hairline);
  padding: 10px 14px;
  font-size: 0.78rem;
}

.ping-route {
  display: flex;
  align-items: center;
  gap: 10px;
}

.route-dot {
  width: 7px;
  height: 7px;
  background: var(--accent-acid);
  display: inline-block;
}

.route-name {
  color: var(--text-white);
  font-weight: 500;
}

.route-type {
  font-size: 0.65rem;
  background: #1C1C1C;
  color: var(--text-dim);
  padding: 2px 6px;
}

.ping-metrics {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
}

.latency {
  color: var(--accent-acid);
  font-weight: 600;
}

.jitter {
  color: var(--text-dim);
  font-size: 0.7rem;
}

.console-graph {
  background: #090909;
  border: 1px solid var(--border-hairline);
  padding: 12px;
  height: 60px;
  display: flex;
  align-items: flex-end;
  gap: 5px;
  margin-bottom: 12px;
}

.bar {
  flex: 1;
  background: #252525;
  transition: height 0.3s ease;
}

.bar.highlight {
  background: var(--accent-acid);
}

/* ==========================================================================
   区块通用样式与分界线
   ========================================================================== */
.section {
  padding: 70px 0;
  border-bottom: 1px solid var(--border-hairline);
  position: relative;
}

.section-header {
  margin-bottom: 45px;
  position: relative;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: -0.5px;
  margin-top: 6px;
  margin-bottom: 10px;
}

.section-header p {
  color: var(--text-dim);
  font-size: 0.92rem;
  max-width: 650px;
}

/* ==========================================================================
   核心优势 SPEC/01-03 (3 个图文卡片)
   ========================================================================== */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.spec-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  transition: border-color 0.2s ease;
}

.spec-card:hover {
  border-color: var(--border-active);
}

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

.spec-index {
  font-size: 0.72rem;
  color: var(--accent-acid);
  letter-spacing: 1.5px;
  margin-bottom: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.spec-status {
  font-size: 0.65rem;
  background: #191B10;
  color: var(--accent-acid);
  border: 1px solid var(--accent-acid-border);
  padding: 2px 6px;
}

.spec-card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 12px;
  line-height: 1.25;
}

.spec-card p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.65;
}

.spec-telemetry-badge {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--border-hairline);
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
}

.spec-telemetry-badge span:first-child {
  color: var(--text-muted);
}

.spec-telemetry-badge span:last-child {
  color: var(--text-white);
  font-weight: 600;
}

/* ==========================================================================
   流媒体与 AI 支持图卡矩阵
   ========================================================================== */
.unlock-matrix-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.matrix-block {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  padding: 28px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.matrix-block h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text-white);
  margin-bottom: 8px;
}

.matrix-desc {
  font-size: 0.84rem;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.service-card {
  background: #0E0E0E;
  border: 1px solid var(--border-hairline);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.service-info {
  display: flex;
  flex-direction: column;
}

.service-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-white);
}

.service-resolution {
  font-size: 0.68rem;
  color: var(--text-dim);
}

.service-status-pill {
  font-size: 0.68rem;
  color: var(--accent-acid);
  background: rgba(214, 243, 47, 0.08);
  border: 1px solid var(--accent-acid-border);
  padding: 2px 7px;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   套餐价格对比表 (Pricing Matrix)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.pricing-card.featured {
  border-color: var(--accent-acid-border);
  background: #141411;
}

.pricing-card.featured::before {
  content: "TOP RECOMMEND / 车队推荐";
  position: absolute;
  top: 0;
  right: 0;
  background: var(--accent-acid);
  color: #0D0D0D;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 10px;
  letter-spacing: 1px;
}

.pricing-header {
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.plan-tier-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 6px;
}

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

.pricing-figure {
  margin: 18px 0 6px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.currency {
  font-size: 1.3rem;
  color: var(--text-white);
}

.amount {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1;
}

.featured .amount {
  color: var(--accent-acid);
}

.billing-cycle {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.plan-features-list {
  list-style: none;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-features-list li {
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.plan-features-list li.highlight-item {
  color: var(--text-white);
  font-weight: 500;
}

.plan-features-list li::before {
  content: "■";
  color: var(--accent-acid);
  font-size: 0.6rem;
  flex-shrink: 0;
}

.pricing-card .btn {
  width: 100%;
}

/* ==========================================================================
   用户评价 (User Telemetry Logs)
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  padding: 24px;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.testimonial-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: 10px;
  font-size: 0.72rem;
}

.user-identity {
  color: var(--text-white);
  font-weight: 600;
}

.user-role-tag {
  color: var(--text-dim);
  font-size: 0.68rem;
}

.user-rating-score {
  color: var(--accent-acid);
  letter-spacing: 2px;
}

.testimonial-body {
  font-size: 0.84rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 14px;
}

.testimonial-telemetry {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ==========================================================================
   常见问题 FAQ (技术折叠面板 - 零 JS 极简秒开)
   ========================================================================== */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.faq-item summary {
  padding: 18px 24px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  color: var(--accent-acid);
  font-size: 1.2rem;
  font-weight: 400;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  content: "—";
}

.faq-answer {
  padding: 0 24px 20px;
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.7;
  border-top: 1px dashed var(--border-hairline);
  margin-top: 4px;
  padding-top: 14px;
}

/* ==========================================================================
   页脚规范 (Site Footer) - 严格保留 4 个新标签链接标题
   ========================================================================== */
.site-footer {
  background: #090909;
  border-top: 1px solid var(--border-hairline);
  padding: 48px 0 36px;
}

.footer-nav-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-hairline);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text-white);
  position: relative;
  padding: 8px 12px;
  border: 1px solid var(--border-hairline);
  background: #111;
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.footer-link-title:hover {
  color: var(--accent-acid);
  border-color: var(--accent-acid-border);
  background: #161612;
}

.footer-copyright {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.footer-copyright .domain-code {
  color: var(--text-dim);
}

/* ==========================================================================
   文章页与资讯中心专有样式
   ========================================================================== */
.article-header {
  padding: 40px 0 25px;
  border-bottom: 1px solid var(--border-hairline);
}

.article-breadcrumb {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 18px;
}

.article-breadcrumb a {
  color: var(--accent-acid);
}

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

.article-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.25;
  margin-bottom: 16px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.article-body {
  padding: 40px 0;
  max-width: 860px;
  margin: 0 auto;
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-white);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-hairline);
}

.article-body h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-white);
  margin: 26px 0 12px;
}

.article-body p {
  font-size: 0.92rem;
  color: #D6D6D0;
  line-height: 1.8;
  margin-bottom: 18px;
}

.article-body ul, .article-body ol {
  margin-left: 20px;
  margin-bottom: 20px;
  color: #D6D6D0;
  font-size: 0.9rem;
  line-height: 1.7;
}

.article-body li {
  margin-bottom: 8px;
}

/* 文章中外部或内部链接自然融合 */
.article-body a.seo-link {
  color: var(--accent-acid);
  text-decoration: underline;
  text-underline-offset: 4px;
  font-weight: 600;
}

.article-body a.seo-link:hover {
  background: var(--accent-acid);
  color: #000;
  text-decoration: none;
}

.article-card-box {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  padding: 20px;
  margin: 25px 0;
  border-left: 3px solid var(--accent-acid);
}

/* 资讯中心列表网格 */
.article-index-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-summary-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-hairline);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: border-color 0.2s ease;
}

.article-summary-card:hover {
  border-color: var(--accent-acid-border);
}

.article-summary-card h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  color: var(--text-white);
  margin: 10px 0 12px;
  line-height: 1.35;
}

.article-summary-card p {
  font-size: 0.84rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 20px;
}

/* ==========================================================================
   响应式适配 (@media 移动端适配，完美单栏显示，按钮手指友好)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .specs-grid, .pricing-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .unlock-matrix-container {
    grid-template-columns: 1fr;
  }
  .hero-stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .article-index-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-header {
    height: auto;
  }
  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 0;
    gap: 12px;
  }
  .nav-menu {
    order: 3;
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    padding-top: 8px;
    border-top: 1px solid var(--border-hairline);
    overflow-x: auto;
  }
  .nav-link {
    font-size: 0.75rem;
    white-space: nowrap;
  }
  .hero-section {
    padding: 36px 0;
  }
  .hero-content h1 {
    font-size: 1.95rem;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
    padding: 14px 20px; /* 适合手指点击的大热区 */
    font-size: 0.88rem;
  }
  .hero-stats-row {
    grid-template-columns: 1fr 1fr;
  }
  .service-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav-container {
    flex-direction: column;
    gap: 14px;
    width: 100%;
  }
  .footer-link-title {
    width: 100%;
    text-align: center;
    padding: 12px;
  }
}