@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ================================================================
 * FUNGENE · 黑腹果蝇转基因 · 设计系统 (调性 C · 活性年轻型)
 *
 * 设计原则：
 * - 沿用 logo 主色（鲜绿 + 鲜橙）
 * - 圆润几何 + 柔和渐变 + 友好排版
 * - 零依赖动画（CSS keyframes + IntersectionObserver）
 * - CSS 变量驱动，便于后续 6 个服务页复用
 * ================================================================ */

/* ============ 1. Design Tokens（品牌色 + 间距 + 动效） ============ */
:root {
  /* 品牌色 */
  --color-bg: #fbfff9;
  --color-bg-soft: #f0faef;
  --color-surface: #ffffff;
  --color-text: #1A1A2E;
  --color-text-muted: #4A5568;
  --color-text-light: #A0AEC0;
  --color-accent: #3AAA35;
  --color-accent-2: #E87722;
  --color-accent-3: #fcd34d;
  --color-accent-soft: #E8F5E9;
  --color-accent-soft-2: #FFF3E0;
  --color-accent-soft-3: #fefce8;
  --color-border: rgba(58, 170, 53, 0.12);
  --color-border-strong: rgba(58, 170, 53, 0.24);

  /* 字体 */
  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-display: "Inter", "PingFang SC", "Hiragino Sans GB", system-ui, sans-serif;

  /* 圆角 */
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;

  /* 间距 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  /* 动效 */
  --duration-fast: 200ms;
  --duration-base: 400ms;
  --duration-slow: 800ms;
  --ease-out: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);

  /* 阴影（柔和） */
  --shadow-sm: 0 2px 8px rgba(58, 170, 53, 0.06);
  --shadow: 0 8px 24px rgba(58, 170, 53, 0.08);
  --shadow-lg: 0 20px 48px rgba(58, 170, 53, 0.12);
}

/* ============ 2. Reset + 基础排版 ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
img, svg { max-width: 100%; display: block; }
ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }

h1, h2, h3, h4 { font-family: var(--font-display); letter-spacing: -0.01em; line-height: 1.25; }

/* ============ 3. Layout（容器、栅格、章节） ============ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}
section {
  padding: var(--space-7) 0;
  position: relative;
}

/* ============ 4. Navigation（浮动 pill 样式） ============ */
.nav {
  position: sticky;
  top: var(--space-3);
  z-index: 100;
  margin: 0 var(--space-4);
  transition: top var(--duration-base) var(--ease-smooth);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}
.brand-logo {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent) 49%, var(--color-accent-2) 50%, var(--color-accent-2) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #fff;
}
.nav-menu { display: flex; gap: var(--space-2); align-items: center; }
.nav-menu > li > a {
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-pill);
  transition: background var(--duration-fast), color var(--duration-fast);
}
.nav-menu > li > a.active,
.nav-menu > li > a:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

/* 一级 dropdown 容器（hover 桌面 / click 触屏） */
.nav-dropdown { position: relative; }
.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-pill);
  transition: background var(--duration-fast), color var(--duration-fast);
  cursor: pointer;
}
.nav-dropdown-trigger:hover,
.nav-dropdown.is-active .nav-dropdown-trigger {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}
.nav-caret {
  font-size: 10px;
  transition: transform var(--duration-fast);
  display: inline-block;
}
.nav-dropdown.is-open > .nav-dropdown-trigger .nav-caret,
.nav-dropdown:hover > .nav-dropdown-trigger .nav-caret {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  min-width: 220px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity var(--duration-fast) var(--ease-smooth),
              transform var(--duration-fast) var(--ease-smooth);
  z-index: 110;
}
.nav-dropdown.is-open > .nav-dropdown-menu,
.nav-dropdown:hover > .nav-dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
/* 一级 dropdown 桥接：透明 ::before 覆盖 trigger→menu 间 8px 间隙，避免 hover 失活 */
.nav-dropdown-menu::before {
  content: '';
  position: absolute;
  top: calc(-1 * var(--space-2) - 2px);
  left: 0;
  right: 0;
  height: calc(var(--space-2) + 2px);
}
.nav-dropdown-menu > li > a {
  display: block;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background var(--duration-fast), color var(--duration-fast);
}
.nav-dropdown-menu > li > a:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

/* 二级 sub 容器 */
.has-sub { position: relative; }
.has-sub > a { padding-right: 36px !important; }
.nav-sub-trigger {
  position: absolute;
  top: 7px;
  right: 6px;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--color-text-muted);
  font-size: 10px;
  transition: background var(--duration-fast), color var(--duration-fast),
              transform var(--duration-fast);
  z-index: 1;
}
.nav-sub-trigger:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}
.has-sub.is-open > .nav-sub-trigger,
.has-sub:hover > .nav-sub-trigger {
  color: var(--color-accent);
}
.has-sub.is-open > .nav-sub-trigger .nav-caret,
.has-sub:hover > .nav-sub-trigger .nav-caret {
  transform: rotate(90deg);
}
.nav-sub-menu {
  position: absolute;
  top: -4px;
  left: 100%;
  margin-left: var(--space-2);
  min-width: 220px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-6px);
  transition: opacity var(--duration-fast) var(--ease-smooth),
              transform var(--duration-fast) var(--ease-smooth);
  z-index: 120;
}
.has-sub.is-open > .nav-sub-menu,
.has-sub:hover > .nav-sub-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}
/* 二级 sub 桥接：透明 ::before 覆盖父级→sub 间 8px 间隙，避免 hover 失活 */
.nav-sub-menu::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(-1 * var(--space-2) - 2px);
  width: calc(var(--space-2) + 2px);
}
/* 三级菜单溢出自动翻向（JS 加 .is-flip 触发） */
.has-sub.is-flip > .nav-sub-menu {
  left: auto;
  right: 100%;
  margin-left: 0;
  margin-right: var(--space-2);
}
.has-sub.is-flip > .nav-sub-menu::before {
  left: auto;
  right: calc(-1 * var(--space-2) - 2px);
}
/* 多级菜单视觉区分（CLAUDE.md §十三 · 视觉层级）
   一级：白底 + 淡绿边 + shadow
   二级（直接挂在 dropdown-menu 下）：极浅绿 + 深绿边 + shadow-sm
   三级（嵌套在 sub-menu 里）：明显淡绿 + 深绿边 + shadow-lg */
.nav-dropdown-menu .nav-sub-menu {
  background: var(--color-bg-soft);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}
.nav-dropdown-menu .nav-sub-menu .nav-sub-menu {
  background: var(--color-accent-soft);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}
/* 三级浮层 hover 高亮（避免与底色同色） */
.nav-dropdown-menu .nav-sub-menu .nav-sub-menu > li > a:hover {
  background: var(--color-accent);
  color: var(--color-surface);
}
.nav-sub-menu > li > a {
  display: block;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: background var(--duration-fast), color var(--duration-fast);
}
.nav-sub-menu > li > a:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

/* ============ 5. Section heading ============ */
.section-heading {
  text-align: center;
  margin-bottom: var(--space-6);
}
.section-eyebrow {
  display: inline-block;
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: var(--color-accent-soft);
  border-radius: var(--radius-pill);
}
.section-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}
.section-desc {
  font-size: 16px;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto;
}

/* ============ 6. Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}
.btn:hover { transform: translateY(-2px) scale(1.02); }
.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  color: #fff;
  box-shadow: 0 8px 24px rgba(58, 170, 53, 0.32);
}
.btn-primary:hover { box-shadow: 0 12px 32px rgba(232, 119, 34, 0.35); }
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1.5px solid var(--color-border-strong);
}
.btn-secondary:hover { background: var(--color-accent-soft); }
.btn-row { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ============ 7. Hero ============ */
.hero {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: 10%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(58, 170, 53, 0.10), transparent 70%);
  border-radius: 50%;
  z-index: 0;
  animation: drift 12s ease-in-out infinite;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -10%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232, 119, 34, 0.08), transparent 70%);
  border-radius: 50%;
  z-index: 0;
  animation: drift 15s ease-in-out infinite reverse;
}
@keyframes drift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(40px, 30px); }
}
.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: var(--space-5);
}
.hero-title {
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-title .emoji {
  display: inline-block;
  animation: wiggle 3s ease-in-out infinite;
}
@keyframes wiggle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-8deg); }
  75% { transform: rotate(8deg); }
}
.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}
.stat-pill {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  box-shadow: var(--shadow-sm);
}
.stat-pill-num {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
}
.stat-pill-label { font-size: 13px; color: var(--color-text-muted); }
.hero-cta { justify-content: center; }

/* 装饰元素：果蝇简笔 + 叶子 */
.hero-deco {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}
.hero-deco-drosophila {
  top: 20%;
  right: 8%;
  font-size: 40px;
  opacity: 0.6;
  animation: float-drosophila 6s ease-in-out infinite;
}
@keyframes float-drosophila {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-20px, 20px); }
}
.hero-deco-leaf {
  bottom: 15%;
  left: 5%;
  font-size: 60px;
  opacity: 0.5;
  animation: float-leaf 7s ease-in-out infinite;
}
@keyframes float-leaf {
  0%, 100% { transform: rotate(-5deg); }
  50% { transform: rotate(8deg); }
}

/* ============ 8. Tech cards (3-up grid) ============ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.tech-card {
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.tech-card:nth-child(1) { background: linear-gradient(160deg, #fff, var(--color-accent-soft)); }
.tech-card:nth-child(2) { background: linear-gradient(160deg, #fff, var(--color-accent-soft-2)); }
.tech-card:nth-child(3) { background: linear-gradient(160deg, #fff, var(--color-accent-soft-3)); }
.tech-card:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: var(--shadow-lg);
}
.tech-emoji {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: var(--space-4);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}
.tech-card-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}
.tech-card-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}
.tech-tags { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.tech-tag {
  padding: var(--space-1) var(--space-3);
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-pill);
  font-size: 12px;
  color: var(--color-text);
  font-weight: 500;
}

/* ============ 9. Process (3-column × 2-row) ============ */
.process-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.process-step {
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  position: relative;
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}
.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.process-step-num {
  width: 44px;
  height: 44px;
  margin: 0 auto var(--space-3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
}
.process-step:nth-child(3n+1) .process-step-num { background: var(--color-accent-soft); color: var(--color-accent); }
.process-step:nth-child(3n+2) .process-step-num { background: var(--color-accent-soft-2); color: #D46515; }
.process-step:nth-child(3n+3) .process-step-num { background: var(--color-accent-soft-3); color: #ca8a04; }
.process-step-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.process-step-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-2);
}
.process-step-duration {
  display: inline-block;
  font-size: 11px;
  color: var(--color-accent);
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
}

/* ============ 10. Tech detail (deep dive cards) ============ */
.tech-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.tech-detail {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  transition: border-color var(--duration-base), transform var(--duration-base);
}
.tech-detail:hover { transform: translateY(-4px); border-color: var(--color-border-strong); }
.tech-detail-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px dashed var(--color-border);
}
.tech-detail-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.tech-detail:nth-child(1) .tech-detail-icon { background: var(--color-accent-soft); }
.tech-detail:nth-child(2) .tech-detail-icon { background: var(--color-accent-soft-2); }
.tech-detail:nth-child(3) .tech-detail-icon { background: var(--color-accent-soft-3); }
.tech-detail-title {
  font-size: 18px;
  font-weight: 700;
}
.tech-detail-section {
  margin-bottom: var(--space-4);
}
.tech-detail-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.tech-detail-text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}
.tech-detail-flow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-3) 0;
  flex-wrap: wrap;
}
.flow-node {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-bg-soft);
  color: var(--color-text);
  font-weight: 500;
}
.flow-arrow { color: var(--color-accent); font-size: 12px; }
.tech-detail-feature-list { margin-top: var(--space-2); }
.tech-detail-feature-list li {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: var(--space-1) 0;
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}
.tech-detail-feature-list li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ============ 11. Comparison table ============ */
.compare-table-wrapper {
  overflow-x: auto;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  margin-top: var(--space-5);
}
.compare-table {
  width: 100%;
  min-width: 720px;
}
.compare-table thead {
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-accent-soft-2));
}
.compare-table th {
  padding: var(--space-4);
  text-align: left;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border-strong);
}
.compare-table td {
  padding: var(--space-3) var(--space-4);
  font-size: 14px;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
.compare-table tbody tr {
  transition: background var(--duration-fast);
}
.compare-table tbody tr:hover { background: var(--color-bg-soft); }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table .row-label {
  font-weight: 700;
  color: var(--color-text);
}
.compare-table .badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 600;
}
.badge-green { background: var(--color-accent-soft); color: var(--color-accent); }
.badge-orange { background: var(--color-accent-soft-2); color: #D46515; }
.badge-yellow { background: var(--color-accent-soft-3); color: #ca8a04; }

/* ============ 12. Application scenarios ============ */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.scenario-card {
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: transform var(--duration-base) var(--ease-out);
}
.scenario-card:hover { transform: translateY(-4px); }
.scenario-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-3);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-accent-soft-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}
.scenario-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.scenario-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-3);
}
.scenario-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  justify-content: center;
}
.scenario-link {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--color-bg-soft);
  color: var(--color-text-muted);
}

/* ============ 13. Case / data showcase ============ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.big-stat {
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  text-align: center;
  border: 1px solid var(--color-border);
  transition: transform var(--duration-base) var(--ease-out);
}
.big-stat:hover { transform: translateY(-4px); }
.big-stat-num {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: var(--space-2);
}
.big-stat-label {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* 客户引用 */
.testimonial {
  padding: var(--space-6);
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-accent-soft-2));
  border-radius: var(--radius-xl);
  text-align: center;
  position: relative;
}
.testimonial::before {
  content: '"';
  position: absolute;
  top: var(--space-2);
  left: var(--space-4);
  font-size: 100px;
  color: var(--color-accent);
  opacity: 0.3;
  font-family: serif;
  line-height: 1;
}
.testimonial-text {
  font-size: 18px;
  color: var(--color-text);
  line-height: 1.6;
  font-style: italic;
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
}
.testimonial-author {
  font-size: 14px;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* logo 墙 */
.logo-wall {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.logo-tile {
  aspect-ratio: 16 / 9;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
}

/* ============ 14. FAQ (details/summary 原生) ============ */
.faq-list {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-5);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--duration-base);
}
.faq-item[open] { border-color: var(--color-border-strong); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform var(--duration-base) var(--ease-out);
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: var(--color-accent);
  color: #fff;
}
.faq-answer {
  padding: 0 var(--space-4) var(--space-4);
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

/* ============ 15. CTA + Footer ============ */
.cta-section {
  padding: var(--space-7) var(--space-4);
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-accent-soft-2));
  border-radius: var(--radius-xl);
  text-align: center;
  margin: var(--space-7) auto;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(58, 170, 53, 0.15), transparent 70%);
  border-radius: 50%;
}
.cta-section > * { position: relative; z-index: 1; }
.cta-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.cta-desc {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-6) 0 var(--space-4);
  margin-top: var(--space-7);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.footer-tagline {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: var(--space-3);
  line-height: 1.6;
}
.footer-contact { font-size: 13px; color: rgba(255, 255, 255, 0.65); line-height: 1.8; }
.footer-heading {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-3);
}
.footer-links { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-links a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  white-space: nowrap;
  transition: color var(--duration-fast);
}
.footer-links a:hover { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-3);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  text-align: center;
}
.footer-compact {
  padding: var(--space-3) 0;
  margin-top: var(--space-6);
}
.footer-compact .footer-bottom {
  border-top: 0;
  padding-top: 0;
}

/* ============ 16. Reveal Animation ============ */
.reveal {
  opacity: 0;
  transform: translateY(30px) scale(0.96);
  transition: opacity var(--duration-slow) var(--ease-smooth), transform var(--duration-slow) var(--ease-smooth);
}
.reveal.is-visible { opacity: 1; transform: translateY(0) scale(1); }
.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }

/* ============ 17. Responsive ============ */
@media (max-width: 968px) {
  section { padding: var(--space-6) 0; }
  .nav { margin: 0 var(--space-3); }
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.mobile-open {
    display: flex;
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    right: 0;
    flex-direction: column;
    gap: var(--space-1);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-3);
    box-shadow: var(--shadow);
  }
  .nav-menu.mobile-open > li { width: 100%; }
  .nav-menu.mobile-open .nav-dropdown-trigger {
    width: 100%;
    justify-content: space-between;
  }
  .nav-menu.mobile-open .nav-dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0 0 0 var(--space-3);
    background: transparent;
    min-width: 0;
    display: none;
    margin-top: var(--space-1);
  }
  .nav-menu.mobile-open .nav-dropdown.is-open > .nav-dropdown-menu { display: block; }
  .nav-menu.mobile-open .nav-sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0 0 0 var(--space-3);
    background: transparent;
    margin-left: 0;
    min-width: 0;
    display: none;
  }
  .nav-menu.mobile-open .has-sub.is-open > .nav-sub-menu { display: block; }
  .nav-menu.mobile-open .has-sub > a { padding-right: 36px !important; }
  .tech-grid,
  .tech-detail-grid { grid-template-columns: 1fr; }
  .process-flow { grid-template-columns: 1fr 1fr; }
  .scenario-grid { grid-template-columns: 1fr 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .container { padding: 0 var(--space-3); }
  .process-flow { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; align-items: stretch; }
  .stat-pill { justify-content: center; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { justify-content: center; }
}

/* ============ 18. Page Layout（侧栏 + 主内容） ============ */
.page-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-5);
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) 0;
  align-items: start;
}
.page-main { min-width: 0; }
@media (max-width: 968px) {
  .page-layout { grid-template-columns: 1fr; gap: 0; padding: var(--space-3) var(--space-3) 0; }
}

/* ============ 19. Sidebar（左侧目录 · 桌面 · 下拉风格 · 7 服务平铺） ============ */
.sidebar {
  position: sticky;
  top: calc(var(--space-7) - var(--space-3));
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.sidebar-group { display: flex; flex-direction: column; }
.sidebar-group-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
}
.sidebar-group-label::after {
  content: '▾';
  font-size: 12px;
  color: var(--color-text-muted);
  transition: transform var(--duration-fast);
}
.sidebar-list {
  display: flex;
  flex-direction: column;
}
.sidebar-link {
  display: block;
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text);
  border-left: 3px solid transparent;
  border-bottom: 1px dashed var(--color-border);
  white-space: nowrap;
  transition: background var(--duration-fast), border-color var(--duration-fast), color var(--duration-fast);
}
.sidebar-link:last-child { border-bottom: none; }
.sidebar-link:hover { background: var(--color-accent-soft); color: var(--color-accent); }
.sidebar-link.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 700;
  border-left-color: var(--color-accent);
}
@media (max-width: 968px) { .sidebar { display: none; } }

/* ============ 20. Mobile Drawer（移动端目录切换） ============ */
.mobile-toc {
  display: none;
  margin: var(--space-3) var(--space-3) 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.mobile-toc-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text);
}
.mobile-toc-toggle .toc-arrow { transition: transform var(--duration-fast); }
.mobile-toc.is-open .toc-arrow { transform: rotate(180deg); }
.mobile-toc-list { display: none; padding: 0 var(--space-3) var(--space-3); }
.mobile-toc.is-open .mobile-toc-list { display: block; }
.mobile-toc-list a {
  display: block;
  padding: 10px 8px;
  font-size: 14px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  white-space: nowrap;
}
.mobile-toc-list a.is-active { color: var(--color-accent); font-weight: 700; border-left-color: var(--color-accent); background: var(--color-accent-soft); }
.mobile-toc-list a:hover { background: var(--color-accent-soft); }
@media (max-width: 968px) { .mobile-toc { display: block; } }

/* ============ 21. Jump Cards（5 张子类跳转卡 · 父级页用 · 自适应 1-5 列） ============ */
.jump-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}
.jump-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: transform var(--duration-base) var(--ease-smooth), box-shadow var(--duration-base) var(--ease-smooth), border-color var(--duration-fast);
  position: relative;
  overflow: hidden;
}
.jump-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-accent-soft) 0%, transparent 60%);
  opacity: 0.6;
  pointer-events: none;
}
.jump-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--color-border-strong); }
.jump-card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background: linear-gradient(135deg, var(--color-accent-soft) 0%, var(--color-accent-soft-2) 100%);
  border-radius: var(--radius);
  margin-bottom: var(--space-3);
  position: relative;
}
.jump-card-title { font-size: 18px; font-weight: 700; color: var(--color-text); margin-bottom: var(--space-2); position: relative; }
.jump-card-desc { font-size: 14px; color: var(--color-text-muted); line-height: 1.6; flex: 1; margin-bottom: var(--space-3); position: relative; }
.jump-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  position: relative;
  transition: gap var(--duration-fast);
}
.jump-card:hover .jump-card-cta { gap: 8px; }
@media (max-width: 968px) { .jump-grid { grid-template-columns: 1fr; gap: var(--space-3); } }

/* ============ 22. Tech Compare Grid（5 大技术横向对比 · 紧凑档 · 自适应 1-5 列） ============ */
.tech-compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-3);
}
.tech-compare-card {
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.tech-compare-head { display: flex; align-items: center; gap: var(--space-2); padding-bottom: 8px; border-bottom: 1px solid var(--color-border); }
.tech-compare-icon { font-size: 18px; }
.tech-compare-title { font-size: 15px; font-weight: 700; color: var(--color-text); }
.tech-compare-section { display: flex; flex-direction: column; gap: 4px; }
.tech-compare-label { font-size: 11px; font-weight: 700; color: var(--color-accent); letter-spacing: 0.04em; }
.tech-compare-text { font-size: 13px; color: var(--color-text); line-height: 1.55; }
.tech-compare-flow { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; font-size: 12px; }
.tech-compare-flow .flow-node { padding: 3px 8px; background: var(--color-accent-soft); color: var(--color-accent); border-radius: var(--radius-pill); font-weight: 600; }
.tech-compare-flow .flow-arrow { color: var(--color-accent); font-size: 10px; }
.tech-compare-list { display: flex; flex-direction: column; gap: 2px; font-size: 12px; color: var(--color-text); }
.tech-compare-list li::before { content: '✓'; color: var(--color-accent); font-weight: 700; margin-right: 6px; }
.tech-compare-tags { display: flex; flex-wrap: wrap; gap: 4px; }
.tech-compare-tags .tech-tag { font-size: 11px; padding: 2px 8px; background: var(--color-accent-soft-3); color: var(--color-text); border-radius: var(--radius-pill); }
@media (max-width: 968px) { .tech-compare-grid { grid-template-columns: 1fr; } }

/* ============ 23. Process Bar（横向 6 步流程条 · 带箭头） ============ */
.process-bar {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  align-items: stretch;
}
.process-bar-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-3) var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  position: relative;
}
.process-bar-step:nth-child(1) { border-radius: var(--radius) 0 0 var(--radius); }
.process-bar-step:nth-child(6) { border-radius: 0 var(--radius) var(--radius) 0; }
.process-bar-step + .process-bar-step { border-left: none; }
.process-bar-num {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.process-bar-title { font-size: 14px; font-weight: 700; color: var(--color-text); margin-bottom: 2px; }
.process-bar-duration { font-size: 11px; color: var(--color-accent); font-weight: 600; }
.process-bar-arrow {
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  color: var(--color-accent);
  font-size: 16px;
  font-weight: 700;
  z-index: 2;
  pointer-events: none;
}
.process-bar-step:last-child .process-bar-arrow { display: none; }
@media (max-width: 968px) {
  .process-bar { grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
  .process-bar-step { border-radius: var(--radius) !important; border: 1px solid var(--color-border) !important; }
  .process-bar-step + .process-bar-step { border-left: 1px solid var(--color-border) !important; }
  .process-bar-arrow { display: none !important; }
  .process-bar-step:nth-child(2n) .process-bar-arrow { display: none !important; }
}
@media (max-width: 600px) { .process-bar { grid-template-columns: 1fr; } }

/* ============ 24. Detail Table（子类详细流程表） ============ */
.detail-table-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.detail-table-head {
  padding: var(--space-3) var(--space-4);
  background: linear-gradient(135deg, var(--color-accent-3) 0%, #fde68a 100%);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-strong);
}
.detail-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.detail-table th, .detail-table td {
  padding: var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.detail-table th {
  background: var(--color-bg-soft);
  font-weight: 700;
  color: var(--color-text);
  font-size: 13px;
}
.detail-table td.step-name {
  font-weight: 700;
  color: var(--color-text);
  width: 20%;
  min-width: 110px;
  background: rgba(58, 170, 53, 0.03);
}
.detail-table td.step-content { width: 65%; }
.detail-table td.step-duration {
  width: 15%;
  min-width: 70px;
  text-align: center;
  font-weight: 700;
  color: var(--color-accent);
  font-size: 14px;
  background: var(--color-accent-soft);
}
.detail-table tr:last-child td { border-bottom: none; }
.detail-table tr.total-row td {
  font-weight: 700;
  background: var(--color-bg-soft);
  font-size: 14px;
}
.detail-table tr.total-row td.step-content { color: var(--color-text-muted); font-weight: 500; text-align: right; }
.detail-table-content { line-height: 1.7; }
.detail-table-content ol { list-style: decimal; padding-left: 20px; margin: 0; }
.detail-table-content ol li { margin-bottom: 2px; }
.detail-table-content em { font-style: normal; color: var(--color-text-muted); }
@media (max-width: 600px) {
  .detail-table { font-size: 12px; }
  .detail-table th, .detail-table td { padding: 10px 8px; }
  .detail-table td.step-name, .detail-table td.step-duration { width: auto; }
}

/* ============ 25. Tech Detail Single（子页单列技术详情） ============ */
.tech-detail-single {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.tech-detail-single-head { display: flex; align-items: center; gap: var(--space-2); padding-bottom: var(--space-2); border-bottom: 1px solid var(--color-border); }
.tech-detail-single-head .tech-detail-icon { font-size: 20px; }
.tech-detail-single-head .tech-detail-title { font-size: 18px; font-weight: 700; }
.tech-detail-single-section { display: flex; flex-direction: column; gap: 6px; }
.tech-detail-single-section .tech-detail-label { font-size: 12px; font-weight: 700; color: var(--color-accent); letter-spacing: 0.04em; }
.tech-detail-single-section .tech-detail-text { font-size: 14px; line-height: 1.7; color: var(--color-text); }
.tech-detail-single-section .tech-detail-flow { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.tech-detail-single-section .tech-detail-feature-list { display: flex; flex-direction: column; gap: 4px; font-size: 14px; }
.tech-detail-single-section .tech-detail-feature-list li::before { content: '✓'; color: var(--color-accent); font-weight: 700; margin-right: 8px; }
.tech-detail-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tech-detail-tags .tech-tag { font-size: 12px; padding: 3px 10px; background: var(--color-accent-soft-3); border-radius: var(--radius-pill); }

/* ============ 26. Hero Simplified（无 CTA 无 pill） ============ */
.hero-simple { padding: var(--space-7) 0 var(--space-5); text-align: center; }
.hero-simple-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: var(--space-3);
}
.hero-simple-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: var(--space-3);
}
.hero-simple-title .highlight { color: var(--color-accent); }
.hero-simple-subtitle {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 720px;
  margin: 0 auto;
}
@media (max-width: 968px) { .hero-simple { padding: var(--space-6) 0 var(--space-4); } }

/* ============ 27. 技术原理示意图（纯 SVG + CSS · 零依赖） ============ */
.diagram-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}
.diagram-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.diagram-title-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}
.diagram-svg {
  width: 100%;
  height: auto;
  display: block;
  min-width: 560px;
}
.diagram-segment-label { font-family: var(--font-sans); font-weight: 600; }
.diagram-row-label { font-family: var(--font-sans); font-weight: 700; fill: var(--color-text); }
.diagram-row-sublabel { font-family: var(--font-sans); font-weight: 500; fill: var(--color-text-muted); }
.diagram-event-text { font-family: var(--font-sans); font-weight: 700; fill: var(--color-accent); }
.diagram-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-border);
  font-size: 12px;
  color: var(--color-text-muted);
}
.diagram-legend-item { display: inline-flex; align-items: center; gap: 6px; }
.diagram-legend-swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  display: inline-block;
  flex-shrink: 0;
}
@media (max-width: 968px) { .diagram-wrap { padding: var(--space-3); } }

/* ============ 28. Service Items（服务范围 / 服务项目卡片） ============ */
.service-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.service-item {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--color-border);
  transition: transform var(--duration-fast), box-shadow var(--duration-fast);
}
.service-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(58, 170, 53, 0.10);
}
.service-item-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.service-item-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin: 12px 0 8px;
  line-height: 1.4;
}
.service-item-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
}
@media (max-width: 968px) {
  .service-items { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--space-3); }
  .service-item { padding: 24px; }
}
@media (max-width: 600px) {
  .service-items { grid-template-columns: 1fr; gap: var(--space-3); }
  .service-item { padding: 20px; }
  .service-item-number { font-size: 26px; }
  .service-item-title { font-size: 16px; }
}

/* ============ Sidebar 嵌套子目录（仅「行为学分析」分区页启用） ============ */
.sidebar-sublist {
  display: flex;
  flex-direction: column;
  margin: 2px 0 var(--space-1) var(--space-3);
  padding-left: var(--space-2);
  border-left: 1px solid var(--color-border);
}
.sidebar-subgroup-label {
  display: block;
  padding: 8px 10px 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text);
}
.sidebar-sublink {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border-left: 3px solid transparent;
  font-size: 13px;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: background var(--duration-fast), color var(--duration-fast);
}
.sidebar-sublink:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent);
}
.sidebar-sublink.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 700;
  border-left-color: var(--color-accent);
}
/* mobile-toc 缩进（复用现有 .mobile-toc-list a 基础样式） */
.mobile-toc-list .toc-sub {
  padding-left: var(--space-4);
  font-size: 13px;
  color: var(--color-text-muted);
}
.mobile-toc-list .toc-sub-2 {
  padding-left: var(--space-5);
  font-size: 13px;
  color: var(--color-text-muted);
}
.mobile-toc-list .toc-sub-label {
  display: block;
  padding: 8px var(--space-4) 2px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-text);
}