/* ==========================================================================
   豆包 - 策划、润色、翻译都在对话里
   画册目录风 · 暖灰纸质底色 + 超大黑页码 (Editorial Book & Giant Folio Numbers)
   ========================================================================== */

:root {
  --primary: #1E3A8A;
  --primary-hover: #172554;
  --primary-light: #EEF2F6;
  --accent-blue: #2563EB;
  --paper-bg: #F5F2EB;
  --paper-card: #FAF8F5;
  --paper-white: #FFFFFF;
  --paper-line: rgba(26, 26, 26, 0.12);
  --paper-line-heavy: rgba(26, 26, 26, 0.85);
  --ink-black: #1A1A1A;
  --ink-dark: #2A2A2A;
  --ink-muted: #666666;
  --ink-light: #8E8E8E;
  --bg-dark: #121820;
  --bg-dark-card: rgba(255, 255, 255, 0.07);
  --border-light: #E8E5DD;
  --border-dark: rgba(255, 255, 255, 0.12);
  --text-main: #1A1A1A;
  --text-muted: #666666;
  --text-light: #FAF8F5;
  --font-serif: "Georgia", "Songti SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-sm: 0 1px 3px rgba(26, 26, 26, 0.05);
  --shadow-md: 0 4px 8px -2px rgba(26, 26, 26, 0.08), 0 2px 4px -2px rgba(26, 26, 26, 0.04);
  --shadow-lg: 0 12px 24px -4px rgba(26, 26, 26, 0.1), 0 4px 8px -4px rgba(26, 26, 26, 0.05);
  --shadow-xl: 0 20px 32px -6px rgba(26, 26, 26, 0.12), 0 8px 12px -6px rgba(26, 26, 26, 0.06);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  scroll-behavior: smooth;
  color: var(--text-main);
  background-color: var(--paper-bg);
  -webkit-font-smoothing: antialiased;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
  background-color: var(--paper-bg);
}

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

/* ==========================================================================
   ★ 画册目录风公共排印：超大黑页码 (Giant Black Folio Numbers)
   ========================================================================== */
.folio-header-badge {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 2px solid var(--paper-line-heavy);
  padding-bottom: 12px;
  margin-bottom: 32px;
  position: relative;
}

.folio-number-huge {
  font-size: 88px;
  line-height: 0.85;
  font-weight: 900;
  color: var(--ink-black);
  letter-spacing: -3px;
  font-family: "Impact", "Arial Black", -apple-system, sans-serif;
  user-select: none;
}

.folio-chapter-meta {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.folio-chapter-tag {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--ink-black);
  text-transform: uppercase;
}

.folio-chapter-title {
  font-size: 14px;
  color: var(--ink-muted);
  font-weight: 600;
}

/* ==========================================================================
   1. 顶部导航栏 (Sticky Nav)
   Flex 布局两端对齐，限宽 1200~1240px，高 64~70px，半透明白底毛玻璃，1px 极浅分界线
   ========================================================================== */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 68px;
  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: all 0.3s ease;
}

.header-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 左侧 Logo + 醒目标识 (18~20px, 字重 700+) */
.brand-logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: block;
}

.brand-logo-text {
  font-size: 19px;
  font-weight: 750;
  letter-spacing: -0.5px;
  color: var(--ink-black);
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-sub-badge {
  font-size: 11px;
  font-weight: 700;
  background: var(--ink-black);
  color: #FFFFFF;
  padding: 2px 7px;
  border-radius: 3px;
  letter-spacing: 0.5px;
}

/* 中间导航 (4~6个，字号 14~15px，悬停具有下划线渐宽动画) */
.nav-links-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link-item {
  font-size: 14.5px;
  font-weight: 550;
  color: var(--ink-dark);
  position: relative;
  padding: 6px 0;
  transition: color 0.25s ease;
}

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

.nav-link-item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--ink-black);
  transition: width 0.3s ease, left 0.3s ease;
  border-radius: 2px;
}

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

/* 右侧次级辅助链接 + 主行动胶囊按钮 (CTA) */
.nav-actions-group {
  display: flex;
  align-items: center;
  gap: 18px;
}

.sub-link {
  font-size: 14px;
  color: var(--ink-muted);
  font-weight: 500;
  transition: color 0.2s ease;
}

.sub-link:hover {
  color: var(--ink-black);
}

.btn-cta-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 20px;
  border-radius: 9999px;
  background: var(--ink-black);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  transition: all 0.25s ease;
}

.btn-cta-pill:hover {
  background: #333333;
  transform: translateY(-1px);
}

/* ==========================================================================
   2. 首屏展示区 (Hero Section) · 画册封面风
   桌面端采用 1.05fr : 0.95fr 双列栅格，移动端单列
   ========================================================================== */
.hero-section {
  padding: 44px 0 64px;
  background-color: var(--paper-bg);
  position: relative;
  border-bottom: 1px solid var(--paper-line);
}

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

/* 左侧内容层 */
.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;
  background: #FFFFFF;
  border: 1px solid var(--paper-line);
  padding: 5px 14px;
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-black);
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.pulse-orange-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #EA580C;
  box-shadow: 0 0 0 rgba(234, 88, 12, 0.6);
  animation: pulse-orange 2s infinite;
}

@keyframes pulse-orange {
  0% { box-shadow: 0 0 0 0 rgba(234, 88, 12, 0.7); }
  70% { box-shadow: 0 0 0 10px rgba(234, 88, 12, 0); }
  100% { box-shadow: 0 0 0 0 rgba(234, 88, 12, 0); }
}

/* 主标题 H1 (48~58px, 1.15~1.2, -1px~-1.5px) */
.hero-h1 {
  font-size: 52px;
  line-height: 1.18;
  letter-spacing: -1.2px;
  font-weight: 850;
  color: var(--ink-black);
  margin-bottom: 18px;
}

.hero-streamer-text {
  background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 50%, #0F172A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 副标题 (16~18px, 限宽 500~540px, #6B7280) */
.hero-subhead {
  font-size: 17px;
  line-height: 1.65;
  color: #6B7280;
  max-width: 530px;
  margin-bottom: 30px;
}

/* 双行动按钮 (Dual CTA) */
.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.btn-primary-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--ink-black);
  color: #FFFFFF;
  font-size: 15.5px;
  font-weight: 650;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  transition: all 0.25s ease;
}

.btn-primary-cta:hover {
  background: #333333;
  transform: translateY(-2px);
}

.btn-ghost-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  background: #FFFFFF;
  color: var(--ink-black);
  font-size: 15.5px;
  font-weight: 600;
  border-radius: 10px;
  border: 1px solid var(--paper-line);
  transition: all 0.25s ease;
}

.btn-ghost-cta:hover {
  border-color: var(--ink-black);
  transform: translateY(-2px);
}

/* 信任勾选项 (Trust Meta) */
.trust-meta-row {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--ink-dark);
  font-weight: 500;
}

.trust-item-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink-black);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 700;
}

/* 右侧视觉层 (拟态交互卡片) */
.hero-visual-col {
  position: relative;
}

.hero-artifact-card {
  background: #FFFFFF;
  border-radius: 18px;
  border: 1px solid var(--paper-line);
  box-shadow: var(--shadow-xl);
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.artifact-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid #F1F5F9;
  margin-bottom: 14px;
}

.artifact-window-controls {
  display: flex;
  gap: 6px;
}

.win-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.win-dot.red { background: #EF4444; }
.win-dot.yellow { background: #F59E0B; }
.win-dot.green { background: #10B981; }

.artifact-status-pill {
  font-size: 12px;
  font-weight: 600;
  background: var(--paper-bg);
  color: var(--ink-black);
  padding: 3px 10px;
  border-radius: 9999px;
  border: 1px solid var(--paper-line);
}

.artifact-image-wrapper {
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 16px;
  border: 1px solid #F1F5F9;
}

.artifact-image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}

.artifact-progress-box {
  background: var(--paper-bg);
  border-radius: 10px;
  padding: 12px 14px;
  border: 1px solid var(--paper-line);
}

.artifact-progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-black);
  margin-bottom: 6px;
}

.artifact-progress-bar {
  width: 100%;
  height: 6px;
  background: #E2E8F0;
  border-radius: 9999px;
  overflow: hidden;
}

.artifact-progress-fill {
  width: 94%;
  height: 100%;
  background: var(--ink-black);
  border-radius: 9999px;
}

/* ==========================================================================
   ★ 画册专属目录导航区 (Editorial Table of Contents Bar)
   ========================================================================== */
.catalog-index-strip {
  background: #FFFFFF;
  border-bottom: 1px solid var(--paper-line);
  padding: 24px 0;
}

.catalog-toc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.catalog-toc-item {
  border-left: 2px solid var(--ink-black);
  padding-left: 14px;
  transition: all 0.25s ease;
}

.catalog-toc-item:hover {
  transform: translateX(4px);
}

.toc-num {
  font-size: 18px;
  font-weight: 900;
  color: var(--ink-black);
  font-family: monospace;
}

.toc-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-black);
  margin: 2px 0;
}

.toc-desc {
  font-size: 12px;
  color: var(--ink-muted);
}

/* ==========================================================================
   3. 核心能力矩阵 (Bento Box Grid) · 02 模块
   4 列网格 repeat(4, 1fr)，间距 20~24px，圆角 16~18px，描边 1px solid #E8EDF5
   顶部 46x46 浅色底托图标容器，:hover translateY(-4px~-6px) 扩散阴影
   ========================================================================== */
.bento-section {
  padding: 72px 0;
  background-color: var(--paper-bg);
  border-bottom: 1px solid var(--paper-line);
}

.section-title-wrap {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-tag-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--ink-black);
  background: #FFFFFF;
  border: 1px solid var(--paper-line);
  padding: 4px 14px;
  border-radius: 9999px;
  margin-bottom: 12px;
}

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

.section-main-sub {
  font-size: 16px;
  color: var(--ink-muted);
  line-height: 1.6;
}

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

.bento-card {
  background: #FFFFFF;
  border: 1px solid var(--paper-line);
  border-radius: 18px;
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.bento-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--ink-black);
}

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

.bento-title {
  font-size: 17px;
  font-weight: 750;
  color: var(--ink-black);
  margin-bottom: 8px;
}

.bento-desc {
  font-size: 13.8px;
  line-height: 1.55;
  color: var(--ink-muted);
  margin-bottom: 18px;
}

.bento-action-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13.5px;
  font-weight: 650;
  color: var(--ink-black);
  margin-top: auto;
  transition: gap 0.25s ease;
}

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

/* ==========================================================================
   4. 深度工作流 (Dark Mode Showcase) · 03 模块
   深蓝黑背景 (#121820)，横向 4 步磨砂卡片，巨大径向渐变光晕
   ========================================================================== */
.dark-showcase-section {
  background: #121820;
  color: #FFFFFF;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--paper-line);
}

.dark-showcase-section::before {
  content: "";
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.18) 0%, rgba(255, 255, 255, 0.05) 50%, rgba(18, 24, 32, 0) 70%);
  pointer-events: none;
}

.dark-title-wrap {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
  position: relative;
  z-index: 2;
}

.dark-pill-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: #94A3B8;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 4px 14px;
  border-radius: 9999px;
  margin-bottom: 12px;
}

.dark-h2 {
  font-size: 34px;
  font-weight: 850;
  letter-spacing: -0.8px;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.dark-subtext {
  font-size: 16px;
  color: #94A3B8;
  line-height: 1.6;
}

.flow-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 2;
  margin-bottom: 48px;
}

.flow-step-card {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 24px 20px;
  transition: all 0.3s ease;
}

.flow-step-card:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-4px);
}

.step-num-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 14px;
  font-family: monospace;
}

.step-card-title {
  font-size: 17px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.step-card-desc {
  font-size: 13.5px;
  line-height: 1.55;
  color: #94A3B8;
}

.dark-image-frame {
  max-width: 720px;
  margin: 0 auto;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  position: relative;
  z-index: 2;
}

.dark-image-frame img {
  width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   5. 场景/用例对比 (Tabs Showcase) · 04 模块
   胶囊 Tab 切换器，双栏 Split Box（左冷灰底气泡，右高亮成果框）
   ========================================================================== */
.cases-section {
  padding: 72px 0;
  background-color: var(--paper-bg);
  border-bottom: 1px solid var(--paper-line);
}

.tabs-nav-wrapper {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.scenario-tab-btn {
  background: #FFFFFF;
  border: 1px solid var(--paper-line);
  color: var(--ink-dark);
  font-size: 14.5px;
  font-weight: 600;
  padding: 9px 22px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.scenario-tab-btn:hover {
  border-color: var(--ink-black);
}

.scenario-tab-btn.active {
  background: var(--ink-black);
  color: #FFFFFF;
  border-color: var(--ink-black);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.split-box-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 1040px;
  margin: 0 auto;
}

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

.split-header-tag {
  font-size: 13px;
  font-weight: 750;
  color: var(--ink-muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.input-bubble-card {
  background: #EAE6DC;
  border: 1px solid var(--paper-line);
  border-radius: 16px;
  padding: 22px;
  color: var(--ink-dark);
  font-size: 14.5px;
  line-height: 1.6;
  flex: 1;
}

.output-result-card {
  background: #FFFFFF;
  border: 1.5px solid var(--ink-black);
  border-radius: 16px;
  padding: 22px;
  color: var(--ink-black);
  font-size: 14.5px;
  line-height: 1.6;
  flex: 1;
  box-shadow: var(--shadow-md);
}

.output-meta-badge {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 750;
  background: var(--paper-bg);
  border: 1px solid var(--paper-line);
  color: var(--ink-black);
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}

/* ==========================================================================
   6. 阶梯定价方案 (Pricing Table) · 05 模块
   3~4 列等高卡片，团队进阶版主推高亮 (2px solid)，大价格 32~36px，✓ 与 —
   ========================================================================== */
.pricing-section {
  padding: 72px 0;
  background-color: var(--paper-bg);
  border-bottom: 1px solid var(--paper-line);
}

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

.pricing-card {
  background: #FFFFFF;
  border: 1px solid var(--paper-line);
  border-radius: 18px;
  padding: 32px 24px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border: 2px solid var(--ink-black);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15);
}

.pricing-badge-popular {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink-black);
  color: #FFFFFF;
  font-size: 11.5px;
  font-weight: 750;
  padding: 4px 14px;
  border-radius: 9999px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.pricing-plan-title {
  font-size: 19px;
  font-weight: 800;
  color: var(--ink-black);
  margin-bottom: 6px;
}

.pricing-plan-desc {
  font-size: 13px;
  color: var(--ink-muted);
  margin-bottom: 20px;
  min-height: 38px;
}

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

.price-currency {
  font-size: 20px;
  font-weight: 750;
  color: var(--ink-black);
}

.price-num {
  font-size: 36px;
  font-weight: 900;
  color: var(--ink-black);
  letter-spacing: -1px;
}

.price-period {
  font-size: 13.5px;
  color: var(--ink-muted);
  margin-left: 4px;
}

.pricing-features-list {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--ink-dark);
}

.feature-check {
  font-weight: 800;
  color: var(--ink-black);
}

.feature-dash {
  font-weight: 700;
  color: #94A3B8;
}

.btn-pricing-action {
  width: 100%;
  padding: 11px 0;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 650;
  text-align: center;
  transition: all 0.25s ease;
  display: inline-block;
}

.btn-pricing-action.primary {
  background: var(--ink-black);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.btn-pricing-action.primary:hover {
  background: #333333;
}

.btn-pricing-action.ghost {
  background: var(--paper-bg);
  border: 1px solid var(--paper-line);
  color: var(--ink-black);
}

.btn-pricing-action.ghost:hover {
  border-color: var(--ink-black);
}

/* ==========================================================================
   7. 疑虑打消与常见问题 (FAQ Accordion) · 06 模块
   单列居中限宽 800~900px，原生 details/summary，折叠 +，展开 -，圆底托小序号
   ========================================================================== */
.faq-section {
  padding: 72px 0;
  background-color: var(--paper-bg);
  border-bottom: 1px solid var(--paper-line);
}

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

.faq-accordion-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-details-item {
  background: #FFFFFF;
  border: 1px solid var(--paper-line);
  border-radius: 14px;
  overflow: hidden;
  transition: all 0.25s ease;
}

.faq-details-item:hover {
  border-color: var(--ink-black);
}

.faq-details-item[open] {
  border-color: var(--ink-black);
  box-shadow: var(--shadow-sm);
}

.faq-summary-row {
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-black);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

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

.faq-toggle-icon {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-black);
  transition: transform 0.25s ease;
}

.faq-content-body {
  padding: 0 22px 20px;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink-dark);
  border-top: 1px solid #F1F5F9;
  padding-top: 14px;
}

.faq-steps-list {
  list-style: none;
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.faq-step-num {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--ink-black);
  color: #FFFFFF;
  font-size: 11.5px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   8. 页脚与合规 (Footer) · 07 封底模块
   深色背景 (#101827)，上下两层 (1.5 + 3 列)，细分割线，版权/ICP/合规
   ========================================================================== */
.footer-dark-section {
  background: #101827;
  color: #9CA3AF;
  padding: 64px 0 32px;
  border-top: 2px solid rgba(255, 255, 255, 0.15);
}

.footer-top-columns {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 48px;
}

.footer-brand-title {
  font-size: 18px;
  font-weight: 750;
  color: #FFFFFF;
  margin-bottom: 12px;
}

.footer-brand-motto {
  font-size: 13.5px;
  line-height: 1.6;
  color: #9CA3AF;
  max-width: 320px;
  margin-bottom: 18px;
}

.footer-tag-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.footer-tag-pill {
  font-size: 11.5px;
  background: rgba(255, 255, 255, 0.08);
  color: #D1D5DB;
  padding: 3px 10px;
  border-radius: 9999px;
}

.footer-col-title {
  font-size: 14.5px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.footer-link-item {
  display: block;
  font-size: 13.5px;
  color: #9CA3AF;
  margin-bottom: 10px;
  transition: color 0.2s ease;
}

.footer-link-item:hover {
  color: #FFFFFF;
}

.footer-bottom-legal {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  color: rgba(156, 163, 175, 0.6);
  flex-wrap: wrap;
  gap: 16px;
}

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

.legal-link {
  color: rgba(156, 163, 175, 0.6);
  transition: color 0.2s ease;
}

.legal-link:hover {
  color: #D1D5DB;
}

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .catalog-toc-grid {
    grid-template-columns: repeat(2, 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);
  }

  .footer-top-columns {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links-menu {
    display: none;
  }

  .folio-number-huge {
    font-size: 60px;
  }

  .hero-h1 {
    font-size: 38px;
  }

  .catalog-toc-grid {
    grid-template-columns: 1fr;
  }

  .split-box-container {
    grid-template-columns: 1fr;
  }

  .bento-grid {
    grid-template-columns: 1fr;
  }

  .flow-steps-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .footer-top-columns {
    grid-template-columns: 1fr;
  }
}