/* ===== 重置 ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{min-height:100vh;background:#1A1A2E;color:#333;font-family:"Noto Sans SC","Source Han Sans SC",Roboto,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:1rem;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,select,textarea{font:inherit;color:inherit;border:none;background:none;outline:none}
button{cursor:pointer}
:focus-visible{outline:2px solid #00C853;outline-offset:2px;border-radius:2px}

/* ===== CSS 变量 ===== */
:root{
  --color-primary:#00C853;
  --color-primary-dark:#00A843;
  --color-primary-light:#66E590;
  --color-secondary:#2979FF;
  --color-secondary-dark:#1A5FD4;
  --color-accent:#FF6D00;
  --color-accent-dark:#E06000;
  --color-bg-dark:#1A1A2E;
  --color-bg-mid:#232340;
  --color-bg-light:#F5F5F5;
  --color-white:#FFFFFF;
  --color-text:#333333;
  --color-text-secondary:#B0BEC5;
  --color-text-on-dark:#E0E0E0;
  --color-border:#2A2A4A;
  --color-border-light:#E0E0E0;
  --font-heading:Impact,"Arial Black","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC",Roboto,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --nav-width:220px;
  --header-mobile-height:56px;
  --content-max:1200px;
  --content-wide:1600px;
  --content-narrow:800px;
  --space-xs:4px;
  --space-sm:8px;
  --space-md:16px;
  --space-lg:32px;
  --space-xl:64px;
  --space-2xl:96px;
  --radius-sm:2px;
  --radius-md:4px;
  --radius-lg:8px;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.12);
  --shadow-md:0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg:0 8px 32px rgba(0,0,0,0.2);
  --transition-fast:150ms ease;
  --transition-base:300ms ease;
  --transition-slow:500ms ease;
  --z-nav-overlay:900;
  --z-nav-drawer:1000;
  --z-header-mobile:1100;
  --z-progress:1200;
}

/* ===== 滚动进度条 ===== */
[data-progress]{
  position:fixed;top:0;left:0;width:0;height:3px;background:linear-gradient(90deg,#00C853,#2979FF);z-index:var(--z-progress);transition:width 100ms linear;pointer-events:none}
[data-progress][data-hidden="true"]{opacity:0;transition:opacity var(--transition-base),width 100ms linear}

/* ===== 跳过链接 ===== */
.skip-link{
  position:absolute;top:-100%;left:var(--space-md);padding:var(--space-sm) var(--space-md);background:#00C853;color:#fff;font-size:0.875rem;font-weight:600;z-index:9999;border-radius:0 0 var(--radius-sm) var(--radius-sm);transition:top var(--transition-fast)}
.skip-link:focus{top:0}

/* ===== 头部 ===== */
.site-header{
  position:fixed;top:0;left:0;height:100vh;width:var(--nav-width);z-index:var(--z-nav-drawer);display:flex;flex-direction:column;background:var(--color-bg-dark);border-right:1px solid var(--color-border);overflow:hidden}

/* 侧边轨道 */
.header-track{
  display:flex;flex-direction:column;height:100%;width:100%;padding:0;background:var(--color-bg-dark)}

/* 品牌区 */
.track-brand{
  padding:var(--space-lg) var(--space-md) var(--space-md);border-bottom:1px solid var(--color-border);position:relative}
.track-logo{
  display:flex;flex-direction:column;gap:var(--space-xs);color:var(--color-white)}
.logo-symbol{
  font-family:var(--font-heading);font-size:1.75rem;font-weight:700;color:var(--color-primary);letter-spacing:1px;line-height:1}
.logo-full{
  font-size:0.75rem;font-weight:400;color:var(--color-text-secondary);letter-spacing:0.5px;white-space:nowrap}
.track-divider{
  display:block;height:2px;width:32px;background:var(--color-primary);margin-top:var(--space-sm);border-radius:1px}

/* 导航 */
.track-nav{
  flex:1;overflow-y:auto;padding:var(--space-md) 0}
.track-nav-list{
  display:flex;flex-direction:column;gap:2px}
.track-nav-list li a{
  display:block;padding:var(--space-sm) var(--space-md);color:var(--color-text-on-dark);font-size:0.9rem;font-weight:500;letter-spacing:0.3px;border-left:3px solid transparent;transition:all var(--transition-fast);position:relative}
.track-nav-list li a:hover,.track-nav-list li a:focus-visible{
  color:var(--color-white);background:rgba(0,200,83,0.08);border-left-color:var(--color-primary)}
.track-nav-list li a[aria-current="page"]{
  color:var(--color-primary);border-left-color:var(--color-primary);background:rgba(0,200,83,0.12);font-weight:600}
.track-nav-list li a[aria-current="page"]::after{
  content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);width:3px;height:16px;background:var(--color-primary);border-radius:1.5px 0 0 1.5px}

/* 底部信息区 */
.track-info{
  padding:var(--space-md);border-top:1px solid var(--color-border);display:flex;flex-direction:column;gap:var(--space-sm)}
.track-marquee{
  display:flex;align-items:center;gap:var(--space-sm);font-size:0.75rem;color:var(--color-text-secondary);overflow:hidden;white-space:nowrap}
.marquee-icon{font-size:0.875rem;flex-shrink:0}
.marquee-text{
  display:inline-block;animation:marquee 12s linear infinite}
@keyframes marquee{
  0%{transform:translateX(0)}
  100%{transform:translateX(-100%)}
}
.track-clock{
  display:flex;align-items:center;gap:var(--space-sm);font-size:0.75rem;color:var(--color-text-secondary)}
.clock-label{
  color:var(--color-accent);font-weight:600;text-transform:uppercase;letter-spacing:0.5px}
.clock-value{
  font-family:var(--font-heading);font-size:1.1rem;color:var(--color-white);letter-spacing:1px}

/* 移动端顶部栏（默认隐藏） */
.header-mobile{display:none}

/* 遮罩 */
.nav-overlay{
  display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);z-index:var(--z-nav-overlay);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);opacity:0;transition:opacity var(--transition-base)}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--color-bg-dark);color:var(--color-text-on-dark);border-top:1px solid var(--color-border);padding:var(--space-xl) 0 0}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1.5fr;gap:var(--space-xl);max-width:var(--content-max);margin:0 auto;padding:0 var(--space-lg)}
.footer-brand{
  display:flex;flex-direction:column;gap:var(--space-md)}
.footer-logo{
  font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:var(--color-primary);letter-spacing:0.5px}
.footer-logo-full{
  font-weight:400;color:var(--color-white);margin-left:var(--space-sm)}
.footer-desc{
  font-size:0.9rem;color:var(--color-text-secondary)}
.footer-trust{
  font-size:0.8rem;color:var(--color-text-secondary);line-height:1.5;padding:var(--space-md);background:rgba(255,255,255,0.04);border-left:3px solid var(--color-primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.footer-heading{
  font-family:var(--font-heading);font-size:1rem;font-weight:600;color:var(--color-white);margin-bottom:var(--space-md);letter-spacing:0.5px;text-transform:uppercase}
.footer-link-list{
  display:flex;flex-direction:column;gap:var(--space-sm)}
.footer-link-list a{
  display:inline-block;color:var(--color-text-secondary);font-size:0.9rem;transition:color var(--transition-fast);position:relative;padding-left:var(--space-md)}
.footer-link-list a::before{
  content:"\2192";position:absolute;left:0;color:var(--color-primary);transition:transform var(--transition-fast)}
.footer-link-list a:hover{
  color:var(--color-primary)}
.footer-link-list a:hover::before{
  transform:translateX(3px)}
.footer-contact-list{
  display:flex;flex-direction:column;gap:var(--space-sm)}
.footer-contact-list li{
  display:flex;gap:var(--space-sm);font-size:0.9rem;color:var(--color-text-secondary);align-items:baseline}
.contact-label{
  font-weight:600;color:var(--color-text-on-dark);min-width:3em;flex-shrink:0}
.footer-contact-list a{
  color:var(--color-text-secondary);transition:color var(--transition-fast)}
.footer-contact-list a:hover{
  color:var(--color-primary)}
.footer-note{
  margin-top:var(--space-md);font-size:0.8rem;color:var(--color-text-secondary);padding:var(--space-sm) var(--space-md);background:rgba(0,200,83,0.06);border-radius:var(--radius-sm);line-height:1.5}
.footer-bottom{
  margin-top:var(--space-xl);border-top:1px solid var(--color-border);padding:var(--space-md) 0}
.footer-bottom-inner{
  display:flex;justify-content:space-between;align-items:center;max-width:var(--content-max);margin:0 auto;padding:0 var(--space-lg);flex-wrap:wrap;gap:var(--space-sm)}
.footer-copyright,.footer-icp{
  font-size:0.8rem;color:var(--color-text-secondary)}
.footer-icp{
  font-family:var(--font-body)}

/* ===== 通用容器 ===== */
.container{max-width:var(--content-max);margin:0 auto;padding:0 var(--space-lg)}
.container-wide{max-width:var(--content-wide);margin:0 auto;padding:0 var(--space-lg)}
.container-narrow{max-width:var(--content-narrow);margin:0 auto;padding:0 var(--space-lg)}

/* ===== 堆叠面板 ===== */
.panel{
  padding:var(--space-xl) 0;margin-bottom:var(--space-lg)}
.panel:last-child{margin-bottom:0}
.panel-dark{background:var(--color-bg-dark);color:var(--color-text-on-dark)}
.panel-light{background:var(--color-bg-light);color:var(--color-text)}
.panel-accent{background:linear-gradient(135deg,var(--color-primary-dark),var(--color-bg-dark));color:var(--color-white)}

/* ===== 网格系统 ===== */
.grid-2,.grid-3,.grid-4{
  display:grid;gap:var(--space-lg)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-lg);font-size:0.9rem;font-weight:600;font-family:var(--font-body);border-radius:var(--radius-sm);transition:all var(--transition-fast);text-align:center;cursor:pointer;border:2px solid transparent;min-height:44px;line-height:1.2}
.btn-primary{
  background:var(--color-primary);color:var(--color-white);border-color:var(--color-primary)}
.btn-primary:hover,.btn-primary:focus-visible{
  background:var(--color-primary-dark);border-color:var(--color-primary-dark);box-shadow:0 0 20px rgba(0,200,83,0.25)}
.btn-accent{
  background:var(--color-accent);color:var(--color-white);border-color:var(--color-accent)}
.btn-accent:hover,.btn-accent:focus-visible{
  background:var(--color-accent-dark);border-color:var(--color-accent-dark);box-shadow:0 0 20px rgba(255,109,0,0.25)}
.btn-outline{
  background:transparent;color:var(--color-primary);border-color:var(--color-primary)}
.btn-outline:hover,.btn-outline:focus-visible{
  background:rgba(0,200,83,0.1);color:var(--color-primary-light)}
.btn-sm{
  padding:var(--space-xs) var(--space-md);font-size:0.8rem;min-height:36px}
.btn-lg{
  padding:var(--space-md) var(--space-xl);font-size:1.1rem;min-height:52px}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-sm);padding:var(--space-md) 0;font-size:0.85rem;color:var(--color-text-secondary)}
.breadcrumb li{
  display:inline-flex;align-items:center;gap:var(--space-sm)}
.breadcrumb li+li::before{
  content:"/";color:var(--color-text-secondary);opacity:0.5}
.breadcrumb a{
  color:var(--color-text-secondary);transition:color var(--transition-fast)}
.breadcrumb a:hover{
  color:var(--color-primary)}
.breadcrumb [aria-current="page"]{
  color:var(--color-text);font-weight:500}

/* ===== 标题排版 ===== */
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-heading);line-height:1.2;color:inherit;font-weight:700}
h1{font-size:3.5rem;letter-spacing:-0.5px}
h2{font-size:2.75rem;letter-spacing:-0.3px}
h3{font-size:2rem;letter-spacing:0}
h4{font-size:1.5rem;letter-spacing:0.3px}
h5{font-size:1.25rem;letter-spacing:0.3px}
h6{font-size:1rem;letter-spacing:0.5px}

/* ===== 正文 ===== */
p,li,blockquote,figcaption{font-family:var(--font-body);line-height:1.7;color:inherit}
.small-text,.text-small{font-size:0.875rem;line-height:1.5}
.text-secondary{color:var(--color-text-secondary)}
.text-primary{color:var(--color-primary)}
.text-accent{color:var(--color-accent)}

/* ===== 分隔装饰 ===== */
.divider{
  display:block;height:2px;width:60px;background:var(--color-primary);margin:var(--space-lg) 0;border-radius:1px}
.divider-center{margin-left:auto;margin-right:auto}
.divider-accent{background:var(--color-accent)}
.divider-secondary{background:var(--color-secondary)}

/* ===== 图片容器基础 ===== */
.figure{
  position:relative;overflow:hidden;background:var(--color-bg-mid);border-radius:var(--radius-sm)}
.figure img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}
.figure:hover img{transform:scale(1.03)}
.figure-caption{
  padding:var(--space-sm) var(--space-md);font-size:0.8rem;color:var(--color-text-secondary);background:rgba(0,0,0,0.6);position:absolute;bottom:0;left:0;right:0}

/* ===== 响应式：平板 ===== */
@media (max-width:1024px){
  :root{--nav-width:200px}
  .track-nav-list li a{font-size:0.85rem;padding:var(--space-sm) var(--space-md)}
  .track-info{padding:var(--space-sm) var(--space-md)}
  .marquee-text{font-size:0.7rem}
  .footer-grid{gap:var(--space-lg);padding:0 var(--space-md)}
}

/* ===== 响应式：手机 ===== */
@media (max-width:768px){
  :root{--nav-width:280px}
  .site-header{width:auto;height:auto;position:fixed;top:0;left:0;right:0;z-index:var(--z-nav-drawer);background:transparent;border-right:none;flex-direction:column}
  .header-track{
    position:fixed;top:0;left:0;width:var(--nav-width);height:100vh;z-index:var(--z-nav-drawer);transform:translateX(-100%);transition:transform var(--transition-base);box-shadow:var(--shadow-lg);border-right:1px solid var(--color-border);padding-top:var(--header-mobile-height)}
  .header-track[data-open="true"]{transform:translateX(0)}
  .nav-overlay{
    display:block;pointer-events:none;z-index:var(--z-nav-overlay)}
  .nav-overlay[data-open="true"]{opacity:1;pointer-events:auto}
  .header-mobile{
    display:flex;align-items:center;justify-content:space-between;height:var(--header-mobile-height);padding:0 var(--space-md);background:var(--color-bg-dark);border-bottom:1px solid var(--color-border);position:fixed;top:0;left:0;right:0;z-index:var(--z-header-mobile)}
  .mobile-logo{
    display:flex;align-items:center;gap:var(--space-sm);color:var(--color-white);font-family:var(--font-heading);font-size:1.25rem;font-weight:700}
  .mobile-logo .logo-symbol{font-size:1.5rem}
  .nav-toggle{
    display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:40px;height:40px;background:transparent;border:none;cursor:pointer;padding:8px;border-radius:var(--radius-sm)}
  .nav-toggle-line{
    display:block;width:24px;height:2px;background:var(--color-white);border-radius:1px;transition:all var(--transition-fast);transform-origin:center}
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .track-nav-list li a{font-size:1rem;padding:var(--space-md) var(--space-lg)}
  .track-brand{padding-top:var(--space-md)}
  .track-info{padding:var(--space-md) var(--space-lg)}
  .footer-grid{grid-template-columns:1fr;gap:var(--space-xl)}
  .footer-bottom-inner{flex-direction:column;text-align:center;gap:var(--space-sm)}
  .container,.container-wide,.container-narrow{padding:0 var(--space-md)}
  .panel{padding:var(--space-lg) 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  h1{font-size:2.25rem}
  h2{font-size:1.75rem}
  h3{font-size:1.5rem}
  .skip-link{left:var(--space-sm);font-size:0.8rem}
}

/* ===== 平板适配（额外） ===== */
@media (min-width:769px) and (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--space-lg)}
  .footer-brand{grid-column:1 / -1}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  h1{font-size:2.75rem}
  h2{font-size:2.25rem}
}

/* ===== 偏好减少运动 ===== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important;scroll-behavior:auto!important}
  .marquee-text{animation:none!important;white-space:normal!important}
  .figure:hover img{transform:none!important}
  [data-progress]{display:none!important}
  .header-track{transition:none!important}
  .nav-overlay{transition:none!important}
  .nav-toggle-line{transition:none!important}
  .track-nav-list li a{transition:none!important}
  .footer-link-list a{transition:none!important}
  .btn{transition:none!important}
  .breadcrumb a{transition:none!important}
}

/* ===== 打印样式 ===== */
@media print{
  .site-header,.site-footer,[data-progress]{display:none!important}
  body{background:#fff;color:#000;margin:0;padding:0}
  .container,.container-wide,.container-narrow{max-width:100%;padding:0}
  .panel{padding:1em 0;margin-bottom:0.5em}
}