/* ==========================================================================
   SHADOWROCKET 小火箭 - 工业安全色 / 卢布尔雅那海报风格样式表
   版式规范：
   - 布局：A5 横版卡片体系，双栏 44/56 中缝 8pt 细线，居中轴对称，不对称左宽右窄
   - 尺寸控制：主标题占幅 43%，模块间隙 9pt (12px)，安全边 6.9%
   - 材质：宣纸质感（中性温润墨灰微孔宣纸底）
   - 设计：电路板直角走线装饰（PCB trace）
   - 装饰限制：【装饰只出现在 右上】，其余区域绝对无冗余装饰
   - 纯平禁忌：【禁止渐变与投影】（全 Solid Flat，无 linear-gradient，无 box-shadow）
   - 圆角规范：【13 / 1 / 13 / 1】 (border-radius: 13px 1px 13px 1px;)
   - 颜色：工业安全色（底中性 #181B1E / 条纹 绛红 #DB4D5B / 数字 葵黄 #FFD027，参考色 #DB4D5B / #5D2089，色相约 358°）
   ========================================================================== */

:root {
  /* 工业安全色体系 */
  --bg-neutral-xuan: #181B1E;       /* 宣纸中性深墨灰底 */
  --bg-neutral-dark: #121417;       /* 极深背景 */
  --bg-card-neutral: #22262B;       /* 中性卡片底 */
  --bg-card-hover: #2B3037;         /* 卡片悬停底 */
  
  --stripe-crimson: #DB4D5B;        /* 工业安全条纹：绛红 (色相约 358°) */
  --stripe-crimson-dark: #A92A37;   /* 深绛红 */
  --ref-purple: #5D2089;            /* 工业海报参考色：深紫电平 */
  --digit-sunflower: #FFD027;       /* 工业高亮数字：葵黄 */
  --digit-sunflower-dim: #D9AE1A;   /* 葵黄暗调 */

  --text-xuan-white: #F4F1EA;       /* 宣纸冷白文字 */
  --text-xuan-muted: #A3A8B1;       /* 次要说明中性灰 */
  --text-xuan-dim: #6E7480;         /* 标注弱化中性灰 */
  
  --border-neutral: #333842;        /* 工业卡片边线 1px */
  --border-crimson: #DB4D5B;        /* 绛红安全警示边框 */
  --border-sunflower: #FFD027;      /* 葵黄高亮边框 */
  
  --status-green: #2ECC71;          /* 状态指示纯绿 */

  /* 物理间隙与比例 */
  --gap-module: 12px;               /* 模块间隙 9pt = 12px */
  --seam-width: 10.67px;            /* 中缝宽度 8pt = 10.67px */
  --safety-margin: 6.9%;            /* 安全边 6.9% */

  /* 严格非对称机械印刷圆角：13 / 1 / 13 / 1 */
  --radius-poster: 13px 1px 13px 1px;

  /* 字体族 */
  --font-poster: "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "Consolas", "Roboto Mono", "Courier New", monospace;
}

/* 全局重置：严格禁止渐变与投影 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  background-image: none !important; /* 彻底禁止任何渐变 linear-gradient / radial-gradient */
  box-shadow: none !important;       /* 彻底禁止投影 box-shadow */
  text-shadow: none !important;      /* 彻底禁止文字投影 */
  filter: none !important;           /* 彻底禁止 drop-shadow 滤镜 */
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-neutral-dark);
  color: var(--text-xuan-white);
  font-family: var(--font-poster);
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-neutral-dark);
  line-height: 1.55;
  overflow-x: hidden;
  position: relative;
}

/* ==========================================================================
   A5 横版卡片画幅体系 (A5 Landscape Card Aspect Ratio)
   ========================================================================== */
.a5-poster-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 var(--safety-margin);
  position: relative;
}

/* 顶部安全条纹装饰栏 (卢布尔雅那工业海报条纹) */
.ljubljana-safety-strip {
  width: 100%;
  background-color: var(--bg-card-neutral);
  border-bottom: 2px solid var(--stripe-crimson);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-xuan-muted);
  padding: 6px var(--safety-margin);
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.ljubljana-safety-strip .strip-warning {
  color: var(--digit-sunflower);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   【装饰只出现在 右上】：电路板直角走线装饰 (PCB Orthogonal Trace)
   ========================================================================== */
.pcb-trace-top-right {
  position: absolute;
  top: 14px;
  right: var(--safety-margin);
  width: 140px;
  height: 90px;
  pointer-events: none;
  z-index: 20;
}

.pcb-trace-top-right svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* 页面除右上角外，绝无其它多余装饰，保持严谨工业印刷感 */

/* ==========================================================================
   1. 导航栏 (Site Navigation)
   左 Logo，中 5 个锚点，右「立即下载」；<768px 收进汉堡
   ========================================================================== */
.site-header {
  width: 100%;
  background-color: var(--bg-neutral-xuan);
  border-bottom: 1px solid var(--border-neutral);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 10px var(--safety-margin);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-xuan-white);
}

.logo-stamp-box {
  width: 38px;
  height: 38px;
  background-color: var(--stripe-crimson);
  color: var(--text-xuan-white);
  font-weight: 900;
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-poster);
  border: 1px solid var(--digit-sunflower);
  font-family: var(--font-mono);
}

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

.logo-brand-h1 {
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-xuan-white);
  line-height: 1.2;
}

.logo-brand-sub {
  font-size: 10.5px;
  color: var(--digit-sunflower);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.header-center-nav {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 20px;
}

.header-center-nav a {
  text-decoration: none;
  color: var(--text-xuan-muted);
  font-size: 13.5px;
  font-weight: 600;
  padding: 6px 4px;
  transition: color 0.15s ease;
  position: relative;
}

.header-center-nav a:hover {
  color: var(--digit-sunflower);
}

.header-right-action {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-header-download {
  background-color: var(--stripe-crimson);
  color: var(--text-xuan-white);
  text-decoration: none;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 800;
  border-radius: var(--radius-poster);
  border: 1px solid var(--digit-sunflower);
  transition: background 0.15s ease;
  white-space: nowrap;
}

.btn-header-download:hover {
  background-color: var(--stripe-crimson-dark);
}

.btn-nav-hamburger {
  display: none;
  background: var(--bg-card-neutral);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  padding: 7px;
  cursor: pointer;
  color: var(--text-xuan-white);
}

/* ==========================================================================
   2. Hero 模块 (大于 1024px 双栏 44/56 中缝 8pt 细线，不对称左宽右窄)
   文案顺序：版本胶囊 → 大标题(占幅43%) → 一段说明 → 更新日期 → 4条勾选卖点 → 双CTA → 五个平台emoji
   右侧：已连接模拟窗 (绿灯、延迟、带宽条装产品感，嵌入 1.webp，首屏 eager)
   ========================================================================== */
.hero-dual-col {
  display: flex;
  align-items: stretch;
  margin-top: var(--gap-module);
  margin-bottom: var(--gap-module);
  background-color: var(--bg-neutral-xuan);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  position: relative;
}

/* 双栏 44/56 中缝 8pt 细线 */
.hero-col-left {
  flex: 0 0 44%;
  width: 44%;
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: var(--seam-width) solid var(--bg-neutral-dark);
  position: relative;
}

/* 中缝 8pt 上的居中 1px 细线 */
.hero-col-left::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: calc(var(--seam-width) * -0.5 - 0.5px);
  width: 1px;
  background-color: var(--stripe-crimson);
}

.hero-col-right {
  flex: 0 0 56%;
  width: 56%;
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-color: var(--bg-card-neutral);
  border-radius: 0 1px 13px 0;
}

/* 版本胶囊 */
.version-pill-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-card-neutral);
  border: 1px solid var(--stripe-crimson);
  color: var(--digit-sunflower);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-poster);
  width: fit-content;
  margin-bottom: 8px;
  text-transform: uppercase;
}

/* 清单骨架：标题句 + 四个短词点 (严格落实规范) */
.skeleton-manifest-box {
  background-color: var(--bg-neutral-dark);
  border-left: 3px solid var(--stripe-crimson);
  padding: 6px 10px;
  margin-bottom: 10px;
  border-radius: 0 1px 1px 0;
}

.skeleton-manifest-title {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-xuan-white);
  margin-bottom: 3px;
}

.skeleton-four-words {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--digit-sunflower);
}

.skeleton-four-words span {
  background-color: var(--bg-card-neutral);
  padding: 1px 5px;
  border: 1px solid var(--border-neutral);
  border-radius: 2px;
}

/* 主标题占幅 43% (严格落实参数) */
.hero-title-limit-43 {
  max-width: 100%;
}

.hero-main-heading {
  font-size: 24px;
  font-weight: 900;
  line-height: 1.25;
  color: var(--text-xuan-white);
  margin-bottom: 6px;
  letter-spacing: -0.3px;
}

.hero-main-heading mark {
  background: transparent;
  color: var(--digit-sunflower);
  border-bottom: 2px solid var(--stripe-crimson);
}

/* 断行策略：破折号分句 */
.em-dash-subtitle {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--stripe-crimson);
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

/* 一段说明 */
.hero-desc-paragraph {
  font-size: 13px;
  color: var(--text-xuan-muted);
  line-height: 1.6;
  margin-bottom: 10px;
}

/* 更新日期 */
.hero-date-stamp {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--digit-sunflower);
  background-color: var(--bg-neutral-dark);
  padding: 4px 8px;
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  width: fit-content;
  margin-bottom: 12px;
}

/* 4 条勾选卖点 */
.hero-four-checkpoints {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 12px;
  margin-bottom: 16px;
}

.hero-four-checkpoints li {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-xuan-white);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-four-checkpoints li span.chk-box {
  width: 16px;
  height: 16px;
  background-color: var(--stripe-crimson);
  color: var(--digit-sunflower);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 900;
  border-radius: var(--radius-poster);
  flex-shrink: 0;
}

/* 双 CTA */
.hero-cta-button-pair {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.btn-cta-primary {
  background-color: var(--stripe-crimson);
  color: var(--text-xuan-white);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 800;
  padding: 10px 22px;
  border-radius: var(--radius-poster);
  border: 1px solid var(--digit-sunflower);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.btn-cta-primary:hover {
  background-color: var(--stripe-crimson-dark);
}

.btn-cta-secondary {
  background-color: var(--bg-neutral-dark);
  color: var(--text-xuan-white);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: var(--radius-poster);
  border: 1px solid var(--border-neutral);
  white-space: nowrap;
}

.btn-cta-secondary:hover {
  border-color: var(--stripe-crimson);
  color: var(--digit-sunflower);
}

/* 五个平台 emoji */
.hero-five-platform-emojis {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-xuan-muted);
  font-family: var(--font-mono);
}

.hero-five-platform-emojis span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 右边「已连接」模拟窗 */
.mockup-status-window {
  background-color: var(--bg-neutral-dark);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
}

.mockup-header-belt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-neutral);
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.mockup-traffic-signals {
  display: flex;
  gap: 6px;
}

.sig-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.3);
}
.sig-red { background-color: #E74C3C; }
.sig-yellow { background-color: #F1C40F; }
.sig-green { background-color: var(--status-green); }

.mockup-telemetry-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-neutral-xuan);
  border: 1px solid var(--border-neutral);
  padding: 8px 12px;
  border-radius: var(--radius-poster);
}

.green-radar-lamp {
  width: 10px;
  height: 10px;
  background-color: var(--status-green);
  border-radius: 50%;
  display: inline-block;
}

.mockup-telemetry-text {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-xuan-white);
}

.mockup-metric-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--digit-sunflower);
  background-color: var(--bg-neutral-dark);
  padding: 2px 6px;
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
}

/* 延迟与带宽条装产品感 */
.mockup-bandwidth-strip {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background-color: var(--bg-neutral-xuan);
  padding: 8px 12px;
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  font-family: var(--font-mono);
  font-size: 11px;
}

.bw-labels {
  display: flex;
  justify-content: space-between;
  color: var(--text-xuan-muted);
}

.bw-gauge-track {
  width: 100%;
  height: 6px;
  background-color: var(--bg-neutral-dark);
  border: 1px solid var(--border-neutral);
  position: relative;
}

.bw-gauge-fill {
  width: 86%;
  height: 100%;
  background-color: var(--stripe-crimson);
}

/* 嵌入 1.webp */
.mockup-img-frame {
  width: 100%;
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  overflow: hidden;
  background-color: var(--bg-neutral-xuan);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mockup-img-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 628;
  display: block;
  object-fit: cover;
}

/* ==========================================================================
   3. 通用章节模块结构 (功能 / 平台 / 场景 / 流程)
   同一套路：居中小标题 + H2 + 一句副文案，下面卡片栅格
   卡片：深色底、1px 边、圆角 13/1/13/1、28–32px 内边距，上面图标圆底
   信息点数量：严格限定为 3 个核心点
   ========================================================================== */
.section-module-card {
  margin-bottom: var(--gap-module);
  background-color: var(--bg-neutral-xuan);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  padding: 24px 20px;
}

.section-head-unified {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 16px auto;
}

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  color: var(--digit-sunflower);
  background-color: var(--bg-neutral-dark);
  border: 1px solid var(--stripe-crimson);
  padding: 2px 8px;
  border-radius: var(--radius-poster);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.section-head-unified h2 {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-xuan-white);
  margin-bottom: 4px;
}

.section-subline-dash {
  font-size: 12.5px;
  color: var(--text-xuan-muted);
  font-weight: 600;
}

/* 卡片栅格 (3 列，信息点数量 3) */
.cards-grid-triplet {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.dark-industrial-card {
  background-color: var(--bg-card-neutral);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease;
}

.dark-industrial-card:hover {
  border-color: var(--stripe-crimson);
}

.card-round-icon-tray {
  width: 44px;
  height: 44px;
  background-color: var(--bg-neutral-dark);
  border: 1px solid var(--border-neutral);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
  color: var(--digit-sunflower);
}

.dark-industrial-card h3 {
  font-size: 15.5px;
  font-weight: 800;
  color: var(--text-xuan-white);
  margin-bottom: 8px;
}

.dark-industrial-card p {
  font-size: 12.5px;
  color: var(--text-xuan-muted);
  line-height: 1.55;
  margin-bottom: 12px;
}

/* 清单骨架：三个短词点堆叠 */
.three-points-stack {
  list-style: none;
  margin-top: auto;
  border-top: 1px solid var(--border-neutral);
  padding-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.three-points-stack li {
  font-size: 11.5px;
  color: var(--text-xuan-white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.three-points-stack li .pin-dot {
  width: 6px;
  height: 6px;
  background-color: var(--stripe-crimson);
  border-radius: 1px;
  flex-shrink: 0;
}

/* 流程模块：CSS Counter 01–04 (或 01–03)，数字用葵黄 */
.process-counter-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  counter-reset: step-counter;
}

.process-step-tile {
  background-color: var(--bg-card-neutral);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  padding: 28px 24px;
  position: relative;
  counter-increment: step-counter;
  display: flex;
  flex-direction: column;
}

.process-step-tile::before {
  content: "0" counter(step-counter);
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 900;
  color: var(--digit-sunflower);
  background-color: var(--bg-neutral-dark);
  border: 1px solid var(--stripe-crimson);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin-bottom: 14px;
}

.process-step-tile h3 {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-xuan-white);
  margin-bottom: 8px;
}

.process-step-tile p {
  font-size: 12px;
  color: var(--text-xuan-muted);
  line-height: 1.55;
  margin-bottom: 10px;
}

/* 折叠屏图解容器 (3.webp, 4.webp) */
.section-diagram-frame {
  margin-top: 14px;
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  overflow: hidden;
  background-color: var(--bg-card-neutral);
}

.section-diagram-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 628;
  display: block;
  object-fit: cover;
}

.diagram-caption {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-xuan-muted);
  padding: 6px 12px;
  border-top: 1px solid var(--border-neutral);
  text-align: right;
  background-color: var(--bg-neutral-dark);
}

/* ==========================================================================
   4. 定价模块 (¥15 / ¥39 / ¥79，专业版加 featured：蓝色/绛红描边、实框、「最受欢迎」胶囊)
   禁止渐变与投影，纯平高对比度
   ========================================================================== */
.pricing-grid-triad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  align-items: stretch;
}

.price-card-unit {
  background-color: var(--bg-card-neutral);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.price-card-unit.featured {
  border: 2px solid var(--stripe-crimson);
  background-color: #241D22; /* 宣纸深绛红中性调底 */
  outline: 2px solid var(--digit-sunflower); /* 纯平双实线取代外发光 */
  outline-offset: -5px;
}

.badge-most-popular {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--stripe-crimson);
  color: var(--digit-sunflower);
  font-size: 11px;
  font-weight: 800;
  padding: 2px 14px;
  border-radius: var(--radius-poster);
  border: 1px solid var(--digit-sunflower);
  letter-spacing: 0.5px;
}

.price-plan-name {
  font-size: 14.5px;
  font-weight: 800;
  color: var(--text-xuan-white);
  margin-bottom: 4px;
}

.price-tag-big {
  font-size: 32px;
  font-weight: 900;
  color: var(--digit-sunflower);
  font-family: var(--font-mono);
  margin-bottom: 12px;
  line-height: 1;
}

.price-tag-big span {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-xuan-muted);
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
  border-top: 1px solid var(--border-neutral);
  padding-top: 12px;
}

.pricing-features-list li {
  font-size: 12px;
  color: var(--text-xuan-white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-features-list li span.tick {
  color: var(--stripe-crimson);
  font-weight: 900;
}

.price-card-unit.featured .pricing-features-list li span.tick {
  color: var(--digit-sunflower);
}

.btn-price-select {
  margin-top: auto;
  text-align: center;
  padding: 10px;
  background-color: var(--bg-neutral-dark);
  color: var(--text-xuan-white);
  text-decoration: none;
  font-size: 13px;
  font-weight: 800;
  border-radius: var(--radius-poster);
  border: 1px solid var(--border-neutral);
  transition: all 0.15s ease;
}

.price-card-unit.featured .btn-price-select {
  background-color: var(--stripe-crimson);
  border-color: var(--digit-sunflower);
  color: var(--text-xuan-white);
}

.btn-price-select:hover {
  background-color: var(--stripe-crimson);
  color: var(--digit-sunflower);
}

/* ==========================================================================
   5. 评价 8 张 + 博客 8 张 (同款卡片，信息密度高)
   评价：星级、引用、头像首字、日期
   博客：分类标签、标题、摘要、阅读量
   ========================================================================== */
.review-blog-grid-8 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.review-item-card {
  background-color: var(--bg-card-neutral);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-stars-strip {
  color: var(--digit-sunflower);
  font-size: 13px;
  margin-bottom: 8px;
  letter-spacing: 2px;
}

.review-quote-body {
  font-size: 12px;
  color: var(--text-xuan-white);
  line-height: 1.5;
  margin-bottom: 12px;
  font-style: italic;
}

.review-author-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid var(--border-neutral);
  padding-top: 8px;
}

.author-avatar-initial {
  width: 26px;
  height: 26px;
  background-color: var(--stripe-crimson);
  color: var(--text-xuan-white);
  font-weight: 800;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-poster);
}

.author-info-unit {
  display: flex;
  flex-direction: column;
}

.author-name-text {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-xuan-white);
}

.review-date-text {
  font-size: 10px;
  color: var(--digit-sunflower);
  font-family: var(--font-mono);
}

/* 博客 8 张卡片 */
.blog-item-card {
  background-color: var(--bg-card-neutral);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.blog-tag-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--digit-sunflower);
  background-color: var(--bg-neutral-dark);
  border: 1px solid var(--stripe-crimson);
  padding: 2px 6px;
  border-radius: var(--radius-poster);
  width: fit-content;
  margin-bottom: 6px;
}

.blog-title-link {
  font-size: 13px;
  font-weight: 800;
  color: var(--text-xuan-white);
  line-height: 1.35;
  margin-bottom: 6px;
  text-decoration: none;
}

.blog-title-link:hover {
  color: var(--digit-sunflower);
}

.blog-summary-text {
  font-size: 11.5px;
  color: var(--text-xuan-muted);
  line-height: 1.5;
  margin-bottom: 10px;
}

.blog-views-counter {
  border-top: 1px solid var(--border-neutral);
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-xuan-dim);
  display: flex;
  justify-content: space-between;
}

/* ==========================================================================
   6. FAQ 手风琴 + 居中底部 CTA + 四栏页脚
   FAQ 单列，默认展开第一项
   底部 CTA 居中，纯平禁止渐变
   ========================================================================== */
.faq-accordion-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-panel-item {
  background-color: var(--bg-card-neutral);
  border: 1px solid var(--border-neutral);
  border-radius: var(--radius-poster);
  overflow: hidden;
}

.faq-panel-item.active {
  border-color: var(--stripe-crimson);
}

.faq-toggle-btn {
  width: 100%;
  padding: 14px 18px;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-xuan-white);
  cursor: pointer;
}

.faq-panel-item.active .faq-toggle-btn {
  color: var(--digit-sunflower);
}

.faq-chevron-icon {
  width: 16px;
  height: 16px;
  stroke: var(--text-xuan-white);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-panel-item.active .faq-chevron-icon {
  transform: rotate(180deg);
  stroke: var(--digit-sunflower);
}

.faq-collapse-body {
  padding: 0 18px 14px 18px;
  font-size: 12.5px;
  color: var(--text-xuan-muted);
  line-height: 1.6;
  display: none;
}

.faq-panel-item.active .faq-collapse-body {
  display: block;
}

/* 底部 CTA (纯平实色，禁止渐变与投影) */
.bottom-cta-banner {
  background-color: var(--bg-card-neutral);
  border: 2px solid var(--stripe-crimson);
  border-radius: var(--radius-poster);
  padding: 36px 24px;
  text-align: center;
  margin-bottom: var(--gap-module);
  position: relative;
}

.bottom-cta-banner h2 {
  font-size: 22px;
  font-weight: 900;
  color: var(--text-xuan-white);
  margin-bottom: 8px;
}

.bottom-cta-banner p {
  font-size: 13px;
  color: var(--text-xuan-muted);
  max-width: 620px;
  margin: 0 auto 16px auto;
}

/* 四栏页脚 */
.site-footer-quad {
  background-color: var(--bg-neutral-xuan);
  border-top: 2px solid var(--stripe-crimson);
  padding: 24px 0 16px 0;
  font-size: 12px;
}

.footer-quad-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.footer-column h4 {
  font-size: 13px;
  font-weight: 800;
  color: var(--digit-sunflower);
  margin-bottom: 10px;
  border-left: 2px solid var(--stripe-crimson);
  padding-left: 6px;
}

.footer-column ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-column ul a {
  text-decoration: none;
  color: var(--text-xuan-muted);
  font-size: 12px;
  transition: color 0.15s ease;
}

.footer-column ul a:hover {
  color: var(--digit-sunflower);
}

.footer-seo-clause {
  border-top: 1px solid var(--border-neutral);
  padding: 12px 0;
  font-size: 11.5px;
  color: var(--text-xuan-dim);
  line-height: 1.6;
}

.footer-seo-clause strong {
  color: var(--text-xuan-muted);
}

.footer-closing-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-neutral);
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-xuan-dim);
}

/* ==========================================================================
   响应式断点适配
   <1024px: Hero 单列，模拟窗掉到文字下面，首屏变高
   <768px: 汉堡菜单，网格变为单列或双列
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-dual-col {
    flex-direction: column;
  }
  .hero-col-left {
    flex: 1 1 100%;
    width: 100%;
    border-right: none;
    border-bottom: var(--seam-width) solid var(--bg-neutral-dark);
  }
  .hero-col-left::after {
    top: auto;
    bottom: calc(var(--seam-width) * -0.5 - 0.5px);
    left: 0;
    right: 0;
    width: 100%;
    height: 1px;
  }
  .hero-col-right {
    flex: 1 1 100%;
    width: 100%;
    border-radius: 0 0 13px 1px;
  }
  .review-blog-grid-8 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --safety-margin: 4%;
  }
  .header-center-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-neutral-xuan);
    border-bottom: 2px solid var(--stripe-crimson);
    flex-direction: column;
    padding: 12px 20px;
    gap: 12px;
  }
  .header-center-nav.open {
    display: flex;
  }
  .btn-nav-hamburger {
    display: block;
  }
  .cards-grid-triplet,
  .process-counter-grid,
  .pricing-grid-triad,
  .footer-quad-grid {
    grid-template-columns: 1fr;
  }
  .review-blog-grid-8 {
    grid-template-columns: 1fr;
  }
  .hero-four-checkpoints {
    grid-template-columns: 1fr;
  }
}