.about-scope {
--color-primary: #0D9488;
  --color-primary-hover: #0F766E;
  --color-primary-active: #115E59;
  --color-primary-light: #CCFBF1;
  --color-primary-lighter: #F0FDFA;
  --color-primary-dark: #134E4A;

  
  --color-accent: #F97316;
  --color-accent-hover: #EA580C;
  --color-accent-light: #FFEDD5;

  
  --color-bg: #FAFAF9;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F5F5F4;
  --color-surface-hover: #F5F5F4;
  --color-surface-selected: #F0FDFA;
  --color-border: #E7E5E4;
  --color-border-strong: #D6D3D1;
  --color-text-primary: #1C1917;
  --color-text-secondary: #57534E;
  --color-text-tertiary: #57534E;
  --color-text-disabled: #A8A29E;
  --color-text-inverse: #FFFFFF;

  
  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-success-dark: #065F46;
  --color-warning: #F59E0B;
  --color-warning-light: #FEF3C7;
  --color-warning-dark: #92400E;
  --color-danger: #EF4444;
  --color-danger-light: #FEE2E2;
  --color-danger-dark: #991B1B;
  --color-info: #3B82F6;
  --color-info-light: #DBEAFE;
  --color-info-dark: #1E40AF;

  
  --color-sidebar-bg: #1C1917;
  --color-sidebar-surface: #292524;
  --color-sidebar-border: #44403C;
  --color-sidebar-text: #E7E5E4;
  --color-sidebar-text-muted: #A8A29E;
  --color-sidebar-text-disabled: #78716C;
  --color-sidebar-active-bg: #0D9488;
  --color-sidebar-active-text: #FFFFFF;
  --color-sidebar-hover-bg: rgba(255,255,255,0.06);
  --color-sidebar-group-label: #78716C;

  
  --color-topbar-bg: #FFFFFF;
  --color-topbar-border: #E7E5E4;

  
  --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI',
               'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-heading: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI',
                  'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-numeric: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;

  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  
  --space-3xs: 2px;
  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 20px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;

  
  --shadow-none: none;
  --shadow-xs: 0 1px 2px rgba(28, 25, 23, 0.04);
  --shadow-sm: 0 1px 3px rgba(28, 25, 23, 0.06), 0 1px 2px rgba(28, 25, 23, 0.04);
  --shadow-md: 0 4px 8px rgba(28, 25, 23, 0.06), 0 2px 4px rgba(28, 25, 23, 0.04);
  --shadow-lg: 0 8px 24px rgba(28, 25, 23, 0.08), 0 4px 8px rgba(28, 25, 23, 0.04);
  --shadow-xl: 0 16px 48px rgba(28, 25, 23, 0.10), 0 8px 16px rgba(28, 25, 23, 0.06);
  --shadow-2xl: 0 24px 64px rgba(28, 25, 23, 0.14);

  
  --sidebar-width: 240px;
  --sidebar-width-collapsed: 64px;
  --topbar-height: 56px;
  --content-max-width: 1440px;
  --content-padding: 24px;
  --drawer-width: 480px;

  
  --z-base: 0;
  --z-sticky-table: 1;
  --z-topbar: 150;
  --z-sidebar: 200;
  --z-dropdown: 300;
  --z-drawer: 310;
  --z-modal: 400;
  --z-command: 500;
  --z-toast: 600;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.about-scope * {
margin: 0; padding: 0; box-sizing: border-box;}
.about-scope a {
text-decoration: none; color: inherit;}
.about-scope button {
font-family: var(--font-body);}
.about-scope img, .about-scope svg {
display: block;}
.about-scope .numeric {
font-family: var(--font-numeric); font-variant-numeric: tabular-nums; font-feature-settings: 'tnum' 1, 'lnum' 1;}
.about-scope .btn-primary {
display: inline-flex; align-items: center; justify-content: center; gap: 6px; background: var(--color-primary); color: var(--color-text-inverse); border: none; border-radius: var(--radius-md); padding: 9px 18px; font-size: 14px; font-weight: 600; line-height: 1.4; cursor: pointer; transition: all 0.12s ease; white-space: nowrap; font-family: var(--font-body);}
.about-scope .btn-primary:hover {
background: var(--color-primary-hover); box-shadow: var(--shadow-md);}
.about-scope .btn-primary:active {
background: var(--color-primary-active); transform: translateY(1px);}
.about-scope .btn-secondary {
display: inline-flex; align-items: center; justify-content: center; gap: 6px; background: var(--color-bg); color: var(--color-text-primary); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); padding: 9px 18px; font-size: 14px; font-weight: 500; line-height: 1.4; cursor: pointer; transition: all 0.12s ease; white-space: nowrap; font-family: var(--font-body);}
.about-scope .btn-secondary:hover {
border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-lighter);}
.about-scope .btn-accent {
display: inline-flex; align-items: center; justify-content: center; gap: 6px; background: var(--color-accent); color: var(--color-text-inverse); border: none; border-radius: var(--radius-md); padding: 9px 18px; font-size: 14px; font-weight: 600; line-height: 1.4; cursor: pointer; transition: all 0.12s ease; white-space: nowrap; font-family: var(--font-body);}
.about-scope .btn-accent:hover {
background: var(--color-accent-hover); box-shadow: var(--shadow-md);}
.about-scope .tag {
display: inline-flex; align-items: center; padding: 2px 10px; border-radius: var(--radius-sm); font-size: 12px; font-weight: 500; background: var(--color-surface-alt); color: var(--color-text-secondary);}
.about-scope .site-header {
position: sticky; top: 0; z-index: var(--z-topbar); height: var(--topbar-height); background: var(--color-topbar-bg); border-bottom: 1px solid var(--color-topbar-border);}
.about-scope .site-header-inner {
max-width: var(--content-max-width); height: 100%; margin: 0 auto; padding: 0 var(--space-xl); display: flex; align-items: center; gap: var(--space-lg);}
.about-scope .site-logo {
display: inline-flex; align-items: center; gap: var(--space-xs); font-weight: 600; color: var(--color-text-primary); font-size: 15px; flex-shrink: 0;}
.about-scope .site-logo .logo-mark {
width: 28px; height: 28px; border-radius: var(--radius-md); background: var(--color-primary); color: var(--color-text-inverse); display: inline-flex; align-items: center; justify-content: center;}
.about-scope .site-nav {
display: flex; align-items: center; gap: var(--space-xs);}
.about-scope .site-nav-link {
padding: var(--space-xs) var(--space-sm); border-radius: var(--radius-md); font-size: 14px; color: var(--color-text-secondary); text-decoration: none; transition: all .12s ease;}
.about-scope .site-nav-link:hover {
background: var(--color-surface); color: var(--color-primary);}
.about-scope .site-nav-link.active {
color: var(--color-primary); font-weight: 600;}
.about-scope .site-actions {
margin-left: auto; display: flex; align-items: center; gap: var(--space-sm);}
.about-scope .site-actions .btn-ghost {
color: var(--color-text-secondary);}
.about-scope .site-hamburger {
display: none;}
.about-scope .site-drawer-overlay {
position: fixed; inset: 0; background: rgba(28, 25, 23, 0.3); z-index: var(--z-drawer); opacity: 0; pointer-events: none; transition: opacity .2s ease;}
.about-scope .site-drawer-overlay.open {
opacity: 1; pointer-events: auto;}
.about-scope .site-drawer {
position: fixed; top: 0; right: 0; bottom: 0; width: 300px; max-width: 82vw; background: var(--color-bg); z-index: var(--z-drawer); transform: translateX(100%); transition: transform .25s cubic-bezier(0.4, 0, 0.2, 1); display: flex; flex-direction: column; box-shadow: var(--shadow-2xl);}
.about-scope .site-drawer.open {
transform: translateX(0);}
.about-scope .site-drawer-header {
display: flex; align-items: center; justify-content: space-between; padding: var(--space-md) var(--space-lg); border-bottom: 1px solid var(--color-border);}
.about-scope .site-drawer-nav {
display: flex; flex-direction: column; gap: 4px; padding: var(--space-md);}
.about-scope .site-drawer-link {
padding: var(--space-sm) var(--space-md); border-radius: var(--radius-md); font-size: 14px; color: var(--color-text-secondary);}
.about-scope .site-drawer-link:hover, .about-scope .site-drawer-link.active {
background: var(--color-surface); color: var(--color-primary);}
.about-scope .site-drawer-actions {
margin-top: auto; padding: var(--space-md); display: flex; flex-direction: column; gap: var(--space-sm); border-top: 1px solid var(--color-border);}
.about-scope .site-footer {
width: 100%; background: var(--color-surface); border-top: 1px solid var(--color-border); padding: var(--space-3xl) 0 var(--space-xl); margin-top: var(--space-3xl);}
.about-scope .site-footer-inner {
max-width: var(--content-max-width); margin: 0 auto; padding: 0 var(--space-xl); display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: var(--space-2xl);}
.about-scope .footer-brand .site-logo {
margin-bottom: var(--space-sm);}
.about-scope .footer-slogan {
font-size: 13px; color: var(--color-text-tertiary); max-width: 280px; line-height: 1.6;}
.about-scope .footer-col-title {
font-size: 14px; font-weight: 600; color: var(--color-text-primary); margin-bottom: var(--space-sm);}
.about-scope .footer-link {
display: block; font-size: 13px; color: var(--color-text-secondary); text-decoration: none; padding: 4px 0;}
.about-scope .footer-link:hover {
color: var(--color-primary);}
.about-scope .footer-bottom {
max-width: var(--content-max-width); margin: var(--space-2xl) auto 0; padding: var(--space-lg) var(--space-xl) 0; border-top: 1px solid var(--color-border); display: flex; justify-content: space-between; gap: var(--space-md); font-size: 12px; color: var(--color-text-tertiary); flex-wrap: wrap;}
.about-scope .container {
max-width: var(--content-max-width); margin: 0 auto; padding: 0 var(--space-xl);}
.about-scope .breadcrumb {
display: flex; align-items: center; gap: var(--space-xs); font-size: 13px; margin-bottom: var(--space-lg);}
.about-scope .breadcrumb-item {
color: var(--color-text-tertiary); cursor: pointer; transition: color 0.12s ease;}
.about-scope .breadcrumb-item:hover {
color: var(--color-primary);}
.about-scope .breadcrumb-item.current {
color: var(--color-text-primary); font-weight: 500;}
.about-scope .breadcrumb-separator {
color: var(--color-text-tertiary); font-size: 12px;}
.about-scope .section {
padding: var(--space-3xl) 0;}
.about-scope .section-alt {
background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border);}
.about-scope .section-head {
text-align: center; max-width: 680px; margin: 0 auto var(--space-2xl);}
.about-scope .section-eyebrow {
display: inline-block; color: var(--color-primary); font-size: 13px; font-weight: 600; letter-spacing: 0.04em; margin-bottom: var(--space-sm);}
.about-scope .section-title {
font-size: 24px; font-weight: 700; color: var(--color-text-primary); letter-spacing: -0.02em;}
.about-scope .section-subtitle {
font-size: 15px; color: var(--color-text-secondary); margin-top: var(--space-sm); line-height: 1.6;}
.about-scope .page-head {
padding: var(--space-3xl) 0; background: linear-gradient(180deg, var(--color-primary-lighter), var(--color-bg)); border-bottom: 1px solid var(--color-border);}
.about-scope .page-head-inner {
max-width: var(--content-max-width); margin: 0 auto; padding: 0 var(--space-xl);}
.about-scope .page-title {
font-size: 32px; font-weight: 700; color: var(--color-text-primary); letter-spacing: -0.02em;}
.about-scope .page-subtitle {
font-size: 16px; color: var(--color-text-secondary); margin-top: var(--space-md); max-width: 680px; line-height: 1.7;}
.about-scope .intro-text {
max-width: 820px; margin: 0 auto; font-size: 16px; line-height: 1.9; color: var(--color-text-secondary);}
.about-scope .intro-text p {
margin-bottom: var(--space-md);}
.about-scope .card-grid-3 {
display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg);}
.about-scope .info-card {
background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-xl); transition: box-shadow .15s ease, border-color .15s ease;}
.about-scope .info-card:hover {
box-shadow: var(--shadow-md); border-color: var(--color-border-strong);}
.about-scope .info-card-icon {
width: 44px; height: 44px; border-radius: var(--radius-md); background: var(--color-primary-light); color: var(--color-primary); display: inline-flex; align-items: center; justify-content: center; margin-bottom: var(--space-md);}
.about-scope .info-card-title {
font-size: 16px; font-weight: 600; color: var(--color-text-primary); margin-bottom: var(--space-xs);}
.about-scope .info-card-desc {
font-size: 14px; color: var(--color-text-secondary); line-height: 1.7;}
.about-scope .timeline {
position: relative; margin-left: 8px; max-width: 820px; margin-right: auto; margin-left: auto;}
.about-scope .timeline::before {
content: ''; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: var(--color-border);}
.about-scope .timeline-item {
position: relative; padding-left: var(--space-2xl); padding-bottom: var(--space-2xl);}
.about-scope .timeline-item:last-child {
padding-bottom: 0;}
.about-scope .timeline-dot {
position: absolute; left: 0; top: 4px; width: 16px; height: 16px; border-radius: var(--radius-full); background: var(--color-primary); border: 3px solid var(--color-primary-lighter); box-sizing: border-box;}
.about-scope .timeline-date {
font-family: var(--font-numeric); font-size: 13px; font-weight: 700; color: var(--color-primary-dark);}
.about-scope .timeline-title {
font-size: 16px; font-weight: 600; color: var(--color-text-primary); margin: 4px 0 6px;}
.about-scope .timeline-desc {
font-size: 14px; color: var(--color-text-secondary); line-height: 1.7;}
.about-scope .stat-grid {
display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg);}
.about-scope .stat-card {
background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-2xl); text-align: center; transition: border-color .12s ease;}
.about-scope .stat-card:hover {
border-color: var(--color-border-strong);}
.about-scope .stat-value {
font-family: var(--font-numeric); font-size: 36px; font-weight: 700; color: var(--color-primary); letter-spacing: -0.02em; line-height: 1.1;}
.about-scope .stat-value .unit {
font-size: 18px; margin-left: 2px;}
.about-scope .stat-label {
font-size: 14px; color: var(--color-text-secondary); margin-top: var(--space-xs);}
.about-scope .mb-2 {
margin-bottom: var(--space-xs);}
.about-scope .mb-3 {
margin-bottom: var(--space-sm);}
.about-scope .flex {
display: flex;}
.about-scope .items-center {
align-items: center;}
.about-scope .text-secondary {
color: var(--color-text-secondary);}
@media (max-width: 1023px) {
.about-scope .card-grid-3, .about-scope .stat-grid {
grid-template-columns: 1fr;}
}
@media (max-width: 768px) {
.about-scope .site-nav, .about-scope .site-actions .btn:not(.btn-accent) {
display: none;}
.about-scope .site-hamburger {
display: inline-flex;}
.about-scope .site-footer-inner {
grid-template-columns: 1fr 1fr;}
.about-scope .page-title {
font-size: 26px;}
}
@media (min-width: 768px) and (max-width: 1023px) {
.about-scope .site-footer-inner {
grid-template-columns: 1.5fr repeat(2, 1fr);}
}
@media (min-width: 1024px) {
.about-scope .site-footer-inner {
grid-template-columns: 1.5fr repeat(4, 1fr);}
}
.about-scope .btn-sm {
padding:6px 12px;font-size:13px;line-height:1.4}