/* ===================================================================
   豆包 - 懂上下文的智能助手
   设计语言：反向转化风 · 浅薄荷底 + 深松绿 · 倒 Z 字：先下载平台，再折回能力与定价
   规范支持：Sticky Nav, Hero, Bento Box, Dark Workflow, Tabs, Pricing, FAQ, Footer
   =================================================================== */

:root {
  /* 浅薄荷与深松绿色彩系统 */
  --mint-bg: #F0FDF4;
  --mint-subtle: #DCFCE7;
  --mint-card: #FFFFFF;
  --mint-border: #BBF7D0;
  --mint-hover: #E6F9EE;

  /* 深松绿核心主色系统 */
  --pine-primary: #065F46;
  --pine-hover: #047857;
  --pine-dark: #064E3B;
  --pine-light: #ECFDF5;
  --pine-border: #A7F3D0;
  --pine-shadow: rgba(6, 95, 70, 0.22);
  --pine-accent: #10B981;
  --pine-glow: rgba(16, 185, 129, 0.35);

  /* 文字层次与中性色 */
  --text-primary: #062E24;
  --text-secondary: #1F3F36;
  --text-muted: #4B6358;
  --text-light: #6EE7B7;

  /* 状态指示与辅助色 */
  --green-online: #10B981;

  /* 基础度量 */
  --header-height: 68px;
  --max-width: 1220px;
  --border-radius: 16px;
  --transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background-color: var(--mint-bg);
  color: var(--text-primary);
  scroll-behavior: smooth;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  background-color: var(--mint-bg);
}

/* 链接基础样式 */
a {
  color: inherit;
  text-decoration: none;
}

/* 容器居中限宽 */
.header-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===================================================================
   1. 顶部导航栏 (Sticky Nav)
   Flex 布局两端对齐，高度 64~70px，半透明白底 + 毛玻璃，底部 1px 极浅分界线
   =================================================================== */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  transition: var(--transition);
}

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

/* 品牌 Logo 与文本组合 */
.brand-logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.brand-logo-img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.brand-sub-badge {
  font-size: 11px;
  font-weight: 700;
  background: var(--pine-light);
  color: var(--pine-primary);
  border: 1px solid var(--pine-border);
  padding: 2px 8px;
  border-radius: 6px;
  letter-spacing: 0;
  margin-left: 4px;
}

/* 中间：锚点导航项 (4~6个，悬停下划线渐宽动画) */
.nav-links-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link-item {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}

.nav-link-item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--pine-primary);
  border-radius: 2px;
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1), left 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link-item:hover,
.nav-link-item.active {
  color: var(--pine-primary);
}

.nav-link-item:hover::after,
.nav-link-item.active::after {
  width: 100%;
  left: 0;
}

/* 右侧次级辅助链接与主行动胶囊按钮 (CTA) */
.nav-actions-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.sub-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.2s;
}

.sub-link:hover {
  color: var(--pine-primary);
}

.btn-cta-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 9999px;
  background: var(--pine-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 14px var(--pine-shadow);
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-cta-pill:hover {
  background: var(--pine-hover);
  box-shadow: 0 6px 18px var(--pine-shadow);
  transform: translateY(-1px);
}

/* ===================================================================
   ★ 特色核心规范：反向转化风 · 倒 Z 字路径引导指示条
   “倒 Z 字：先下载平台，再折回能力与定价”
   =================================================================== */
.reverse-z-flow-strip {
  position: sticky;
  top: var(--header-height);
  z-index: 990;
  background: rgba(240, 253, 244, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--mint-border);
  padding: 9px 0;
  box-shadow: 0 2px 8px rgba(6, 95, 70, 0.03);
}

.reverse-z-track {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.reverse-z-track::-webkit-scrollbar {
  display: none;
}

.reverse-z-node {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  background: #FFFFFF;
  border: 1.5px solid var(--mint-border);
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
}

.reverse-z-node:hover {
  border-color: var(--pine-primary);
  color: var(--pine-primary);
  background: var(--pine-light);
  transform: translateY(-1px);
}

.reverse-z-node.active {
  background: var(--pine-primary);
  border-color: var(--pine-primary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px var(--pine-shadow);
}

.reverse-z-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--mint-subtle);
  color: var(--pine-dark);
  font-size: 11px;
  font-weight: 800;
}

.reverse-z-node.active .reverse-z-badge {
  background: rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
}

.reverse-z-arrow {
  color: #86EFAC;
  font-size: 13px;
  font-weight: 800;
  user-select: none;
}

/* ===================================================================
   2. 首屏展示区 (Hero Section)
   桌面端 1.05fr : 0.95fr 双列栅格，移动端单列垂直堆叠
   =================================================================== */
.hero-section {
  padding: 56px 0 72px 0;
  position: relative;
  background: #FFFFFF;
  border-bottom: 1px solid var(--mint-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

/* 左侧内容层（文案与转化） */
.hero-content-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

/* 状态微标 Pill Badge */
.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: var(--pine-light);
  border: 1px solid var(--pine-border);
  border-radius: 9999px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--pine-primary);
  margin-bottom: 22px;
}

.pulse-green-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--green-online);
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* 主标题 H1 (48~58px，行高 1.15~1.2，字距 -1px~-1.5px，流光渐变) */
.hero-h1 {
  font-size: 52px;
  line-height: 1.18;
  letter-spacing: -1.2px;
  font-weight: 850;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-gradient-text {
  background: linear-gradient(135deg, #065F46 0%, #047857 50%, #10B981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 副标题 Sub-headline (16~18px，中性灰 #6B7280，最大宽度 500~540px) */
.hero-subhead {
  font-size: 17px;
  line-height: 1.68;
  color: #6B7280;
  max-width: 530px;
  margin-bottom: 32px;
}

/* 双行动按钮 Dual CTA */
.dual-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.btn-primary-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--pine-primary);
  color: #FFFFFF;
  font-size: 15.5px;
  font-weight: 700;
  border-radius: 9999px;
  box-shadow: 0 6px 20px var(--pine-shadow);
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary-cta:hover {
  background: var(--pine-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--pine-shadow);
}

.btn-ghost-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  background: #FFFFFF;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 700;
  border-radius: 9999px;
  border: 1.5px solid var(--mint-border);
  transition: var(--transition);
}

.btn-ghost-cta:hover {
  border-color: var(--pine-primary);
  color: var(--pine-primary);
  background: var(--pine-light);
}

/* 信任勾选项 Trust Meta (3个✓) */
.trust-meta-row {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.trust-check {
  color: var(--pine-primary);
  font-weight: 800;
  font-size: 14px;
}

/* 右侧拟态交互界面卡片 (Visual Artifact) */
.hero-artifact-card {
  background: #FFFFFF;
  border: 1px solid var(--mint-border);
  border-radius: 20px;
  box-shadow: 0 16px 36px rgba(6, 95, 70, 0.08);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.artifact-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--mint-border);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.mac-dots {
  display: flex;
  gap: 6px;
}

.mac-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-r { background: #FF5F56; }
.dot-y { background: #FFBD2E; }
.dot-g { background: #27C93F; }

.artifact-title-tab {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--pine-primary);
  background: var(--pine-light);
  padding: 4px 10px;
  border-radius: 6px;
}

/* 拟态气泡与加载进度 */
.artifact-chat-bubble {
  background: var(--mint-bg);
  border-radius: 14px;
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-secondary);
  margin-bottom: 14px;
  border: 1px solid var(--mint-border);
}

.artifact-progress-bar {
  background: #E2E8F0;
  height: 6px;
  border-radius: 9999px;
  overflow: hidden;
  margin-bottom: 16px;
}

.artifact-progress-inner {
  width: 82%;
  height: 100%;
  background: linear-gradient(90deg, #065F46, #10B981);
  border-radius: 9999px;
}

/* 嵌入 1.webp */
.artifact-image-wrap {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--mint-border);
  margin-bottom: 14px;
  background: #FAFAFC;
}

.artifact-image-wrap img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ===================================================================
   ★ 倒 Z 轴第 2 站：先下载平台 (Platform Download Matrix Section)
   =================================================================== */
.download-first-section {
  padding: 70px 0;
  background: var(--mint-bg);
  border-bottom: 1px solid var(--mint-border);
}

.download-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.download-platform-card {
  background: #FFFFFF;
  border: 1.5px solid var(--mint-border);
  border-radius: 18px;
  padding: 30px 24px;
  text-align: center;
  box-shadow: 0 10px 25px rgba(6, 95, 70, 0.04);
  transition: var(--transition);
  position: relative;
}

.download-platform-card:hover {
  transform: translateY(-4px);
  border-color: var(--pine-primary);
  box-shadow: 0 14px 30px rgba(6, 95, 70, 0.1);
}

.download-card-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--pine-primary);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

.download-icon-box {
  width: 52px;
  height: 52px;
  background: var(--pine-light);
  border: 1px solid var(--pine-border);
  border-radius: 14px;
  margin: 0 auto 16px auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

/* ===================================================================
   3. 核心能力矩阵 (Bento Box Grid)
   4 列网格 repeat(4, 1fr)，间距 20~24px，统一圆角 16~18px，描边 #E8EDF5
   顶部 46x46 浅色底托图标，hover translateY(-4~-6px) 扩散阴影
   =================================================================== */
.bento-section {
  padding: 80px 0;
  background: #FFFFFF;
  border-bottom: 1px solid var(--mint-border);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px auto;
}

.section-title {
  font-size: 34px;
  font-weight: 850;
  letter-spacing: -0.8px;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.6;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.bento-card {
  background: var(--mint-bg);
  border: 1px solid #E8EDF5;
  border-radius: 18px;
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
  position: relative;
}

.bento-card:hover {
  transform: translateY(-5px);
  border-color: var(--pine-border);
  box-shadow: 0 14px 30px rgba(6, 95, 70, 0.1);
  background: #FFFFFF;
}

.bento-icon-container {
  width: 46px;
  height: 46px;
  background: var(--pine-light);
  border: 1px solid var(--pine-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
}

.bento-card-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.bento-card-desc {
  font-size: 13.8px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.bento-link-action {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--pine-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}

.bento-card:hover .bento-link-action {
  gap: 8px;
}

/* ===================================================================
   4. 深度工作流 (Dark Mode Showcase)
   深蓝黑背景 #0B0F19，径向光晕，横向 4 步卡片排布，磨砂半透明
   =================================================================== */
.dark-workflow-section {
  background-color: #0B0F19;
  color: #FFFFFF;
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}

.radial-glow-bg {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translate(-50%, -20%);
  width: 680px;
  height: 420px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.25) 0%, rgba(11, 15, 25, 0) 70%);
  filter: blur(50px);
  pointer-events: none;
}

.dark-workflow-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px auto;
  position: relative;
  z-index: 2;
}

.dark-workflow-head .section-title {
  color: #FFFFFF;
}

.dark-workflow-head .section-desc {
  color: #94A3B8;
}

.flow-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 2;
  margin-bottom: 40px;
}

.flow-step-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 16px;
  padding: 24px 20px;
  transition: var(--transition);
}

.flow-step-card:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(52, 211, 153, 0.5);
  transform: translateY(-4px);
}

.step-num-pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  color: #6EE7B7;
  background: rgba(6, 95, 70, 0.35);
  border: 1px solid rgba(110, 231, 183, 0.3);
  padding: 3px 10px;
  border-radius: 9999px;
  margin-bottom: 14px;
}

.step-title {
  font-size: 16.5px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #FFFFFF;
}

.step-desc {
  font-size: 13.5px;
  color: #94A3B8;
  line-height: 1.6;
}

/* 嵌入 2.webp */
.dark-showcase-visual {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.dark-showcase-visual img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

/* ===================================================================
   5. 场景/用例对比 (Tabs Showcase)
   上方胶囊 Tab 切换器，下方双栏 Split Box 对照框 (左冷灰底气泡，右高亮成果框)
   ================================================================== */
.tabs-section {
  padding: 80px 0;
  background: var(--mint-bg);
}

.tabs-nav-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab-pill-btn {
  padding: 10px 22px;
  border-radius: 9999px;
  font-size: 14.5px;
  font-weight: 700;
  background: #FFFFFF;
  border: 1.5px solid var(--mint-border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.tab-pill-btn:hover {
  border-color: var(--pine-primary);
  color: var(--pine-primary);
}

.tab-pill-btn.active {
  background: var(--pine-primary);
  color: #FFFFFF;
  border-color: var(--pine-primary);
  box-shadow: 0 4px 14px var(--pine-shadow);
}

.split-box-container {
  max-width: 980px;
  margin: 0 auto;
  background: #FFFFFF;
  border: 1.5px solid var(--mint-border);
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(6, 95, 70, 0.05);
}

.split-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 28px;
}

.split-col {
  display: flex;
  flex-direction: column;
}

.split-header-label {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.label-input {
  color: var(--text-muted);
}

.label-output {
  color: var(--pine-primary);
}

.bubble-user-input {
  background: #F1F5F9;
  border: 1px solid var(--mint-border);
  border-radius: 14px;
  padding: 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  height: 100%;
}

.card-ai-output {
  background: var(--pine-light);
  border: 1.5px solid var(--pine-border);
  border-radius: 14px;
  padding: 20px;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.7;
  height: 100%;
  position: relative;
}

.ai-output-badge {
  display: inline-block;
  background: var(--pine-primary);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 10px;
}

/* ===================================================================
   6. 阶梯定价方案 (Pricing Table)
   3~4 列等高卡片网格，主推卡片外边框主色高亮 2px solid var(--blue/green) + 顶部溢出微标
   =================================================================== */
.pricing-section {
  padding: 85px 0;
  background: #FFFFFF;
  border-top: 1px solid var(--mint-border);
  border-bottom: 1px solid var(--mint-border);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-card {
  background: var(--mint-bg);
  border: 1.5px solid var(--mint-border);
  border-radius: 20px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(6, 95, 70, 0.08);
}

/* 主推卡片高亮 (Hot / Recommended) */
.pricing-card.hot-recommended {
  border: 2px solid var(--pine-primary);
  background: #FFFFFF;
  box-shadow: 0 14px 34px var(--pine-shadow);
}

.pricing-hot-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--pine-primary);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 14px;
  border-radius: 9999px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.pricing-tier-name {
  font-size: 19px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.pricing-tier-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
}

.price-currency {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.price-amount {
  font-size: 34px;
  font-weight: 850;
  color: var(--text-primary);
  line-height: 1;
}

.price-period {
  font-size: 13px;
  color: var(--text-muted);
}

.pricing-btn {
  width: 100%;
  padding: 11px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 24px;
  cursor: pointer;
  transition: var(--transition);
  display: block;
}

.btn-tier-ghost {
  background: #FFFFFF;
  border: 1.5px solid var(--mint-border);
  color: var(--text-secondary);
}

.btn-tier-ghost:hover {
  border-color: var(--pine-primary);
  color: var(--pine-primary);
}

.btn-tier-highlight {
  background: var(--pine-primary);
  color: #FFFFFF;
  border: 1.5px solid var(--pine-primary);
  box-shadow: 0 4px 12px var(--pine-shadow);
}

.btn-tier-highlight:hover {
  background: var(--pine-hover);
}

.pricing-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 13.5px;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.feat-check {
  color: var(--pine-primary);
  font-weight: 900;
}

.feat-cross {
  color: #CBD5E1;
  font-weight: 700;
}

/* ===================================================================
   7. 疑虑打消与常见问题 (FAQ Accordion)
   单列居中限宽 800~900px，原生 details/summary，展开 +/- 切换，小序号
   =================================================================== */
.faq-section {
  padding: 85px 0;
  background: var(--mint-bg);
}

.faq-inner-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-accordion-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-accordion-item {
  background: #FFFFFF;
  border: 1.5px solid var(--mint-border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-accordion-item[open] {
  border-color: var(--pine-border);
  box-shadow: 0 6px 18px rgba(6, 95, 70, 0.08);
}

.faq-summary-bar {
  list-style: none;
  padding: 18px 22px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 750;
  color: var(--text-primary);
  user-select: none;
}

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

.faq-toggle-icon {
  font-size: 20px;
  font-weight: 700;
  color: var(--pine-primary);
  width: 24px;
  text-align: center;
}

.faq-expand-content {
  padding: 0 22px 20px 22px;
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  border-top: 1px solid var(--mint-subtle);
  padding-top: 14px;
}

.faq-step-numbered-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-step-list-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.step-num-badge {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background: var(--pine-light);
  color: var(--pine-primary);
  border: 1px solid var(--pine-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
}

/* ===================================================================
   8. 页脚与合规 (Footer)
   深色背景 #101827，分为上下两层 (上层 1.5:3 非对称多列，下层版权细线分割)
   =================================================================== */
.site-footer {
  background-color: #101827;
  color: #E2E8F0;
  padding: 70px 0 30px 0;
  border-top: 1px solid #1E293B;
  margin-top: auto;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 14px;
}

.footer-brand-desc {
  font-size: 13.5px;
  color: #94A3B8;
  line-height: 1.68;
  max-width: 320px;
}

.footer-col-title {
  font-size: 14.5px;
  font-weight: 750;
  color: #FFFFFF;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-links-list a {
  font-size: 13.5px;
  color: #94A3B8;
  transition: color 0.2s ease;
}

.footer-links-list a:hover {
  color: #6EE7B7;
}

.footer-bottom-legal {
  border-top: 1px solid #1E293B;
  padding-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: rgba(226, 232, 240, 0.45);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-legal-links {
  display: flex;
  gap: 20px;
}

.footer-legal-links a {
  color: rgba(226, 232, 240, 0.45);
  transition: color 0.2s;
}

.footer-legal-links a:hover {
  color: #6EE7B7;
}

/* ===================================================================
   响应式断点适配 (移动端与小屏)
   =================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .download-cards-grid {
    grid-template-columns: 1fr;
  }
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .flow-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .split-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links-menu {
    display: none;
  }
  .hero-h1 {
    font-size: 38px;
  }
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .flow-steps-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-bottom-legal {
    flex-direction: column;
    align-items: flex-start;
  }
}