:root{
  --bg-deep:#081527;
  --bg-card:#112240;
  --royal:#1E4E9C;
  --gold:#D4B77A;
  --gold-bright:#E8C87E;
  --cyan-start:#A8DADC;
  --cyan-end:#6BB4C4;
  --text-main:#F0F4F8;
  --text-sub:#94A3B8;
  --font-serif:"思源宋体","Source Han Serif SC",Georgia,serif;
  --font-sans:"思源黑体","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --header-w:280px;
  --radius-lg:28px;
  --radius-md:18px;
  --radius-pill:999px;
  --shadow-card:0 18px 50px rgba(0,0,0,.35);
  --shadow-gold:0 12px 40px rgba(212,183,122,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --side-space:clamp(20px,5vw,72px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--bg-deep)}
body{
  background:
    radial-gradient(circle at 82% 12%,rgba(30,78,156,.22),transparent 36%),
    radial-gradient(circle at 34% 88%,rgba(212,183,122,.06),transparent 40%),
    var(--bg-deep);
  color:var(--text-main);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.7;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
#main-content{
  min-height:70vh;
  margin-left:var(--header-w);
  width:calc(100% - var(--header-w));
  position:relative;
}
img{max-width:100%;display:block}
a{color:var(--cyan-start);text-decoration:none;transition:color .3s var(--ease)}
a:hover{color:var(--gold-bright)}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
:focus-visible{
  outline:3px solid var(--gold-bright);
  outline-offset:3px;
  border-radius:6px;
}
::selection{background:var(--royal);color:#fff}

.skip-link{
  position:fixed;
  top:16px;
  left:16px;
  z-index:2000;
  background:var(--gold);
  color:#081527;
  padding:10px 20px;
  border-radius:var(--radius-pill);
  font-weight:600;
  transform:translateY(-200%);
  transition:transform .3s var(--ease);
}
.skip-link:focus{
  transform:translateY(0);
}

.site-header{
  position:fixed;
  top:0;
  left:0;
  width:var(--header-w);
  height:100vh;
  z-index:1000;
  background:
    linear-gradient(180deg,rgba(17,34,64,.96),rgba(8,21,39,.98)),
    var(--bg-card);
  border-right:1px solid rgba(212,183,122,.16);
  padding:32px 0 28px;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
}
.header-rail{
  height:100%;
  display:flex;
  flex-direction:column;
  padding:0 22px;
}
.brand-mark{
  display:inline-flex;
  flex-direction:column;
  padding:14px 18px;
  border-radius:var(--radius-md);
  background:linear-gradient(135deg,rgba(30,78,156,.3),rgba(8,21,39,.2));
  border:1px solid rgba(212,183,122,.28);
  transition:border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.brand-mark:hover{
  border-color:var(--gold-bright);
  box-shadow:var(--shadow-gold);
}
.brand-cn{
  font-family:var(--font-serif);
  font-size:22px;
  font-weight:800;
  letter-spacing:.08em;
  color:var(--text-main);
  line-height:1.2;
}
.brand-en{
  font-size:11px;
  letter-spacing:.42em;
  color:var(--gold);
  margin-top:4px;
  text-transform:uppercase;
}

.site-nav{
  margin-top:44px;
  flex:1;
}
.nav-list{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:12px 14px;
  border-radius:var(--radius-pill);
  color:var(--text-main);
  font-size:15px;
  font-weight:500;
  letter-spacing:.03em;
  border:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease);
}
.nav-link sup{
  font-family:var(--font-serif);
  font-size:13px;
  font-weight:700;
  color:var(--cyan-start);
  letter-spacing:.1em;
  min-width:24px;
  opacity:.85;
  transition:color .3s var(--ease);
}
.nav-link:hover{
  background:rgba(30,78,156,.28);
  border-color:rgba(168,218,220,.3);
  transform:translateX(6px);
  color:#fff;
}
.nav-link[aria-current="page"]{
  background:linear-gradient(90deg,rgba(30,78,156,.45),rgba(17,34,64,.2));
  border-color:var(--gold);
  color:var(--gold-bright);
  font-weight:600;
  box-shadow:0 8px 24px rgba(8,21,39,.5);
}
.nav-link[aria-current="page"] sup{
  color:var(--gold-bright);
}

.header-actions{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-top:28px;
}
.action-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:13px 18px;
  border-radius:var(--radius-pill);
  background:rgba(30,78,156,.24);
  border:1px solid rgba(168,218,220,.2);
  color:var(--text-main);
  font-size:14px;
  font-weight:600;
  position:relative;
  overflow:hidden;
  transition:background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.action-link::after{
  content:"";
  position:absolute;
  top:0;
  left:-100%;
  width:100%;
  height:100%;
  background:linear-gradient(100deg,transparent,rgba(232,200,126,.22),transparent);
  transition:left .6s var(--ease);
}
.action-link:hover::after{
  left:110%;
}
.action-link:hover{
  border-color:var(--gold);
  background:rgba(30,78,156,.42);
  box-shadow:var(--shadow-gold);
}
.action-link-gold{
  background:linear-gradient(135deg,rgba(212,183,122,.22),rgba(212,183,122,.06));
  border-color:rgba(212,183,122,.34);
  color:var(--gold-bright);
}
.action-glyph{
  width:18px;
  height:18px;
  position:relative;
  flex:none;
}
.action-glyph-search::before{
  content:"";
  position:absolute;
  width:11px;
  height:11px;
  border:2px solid currentColor;
  border-radius:50%;
  top:1px;
  left:1px;
}
.action-glyph-search::after{
  content:"";
  position:absolute;
  width:7px;
  height:2px;
  background:currentColor;
  transform:rotate(45deg);
  bottom:2px;
  right:0;
  border-radius:2px;
}
.action-glyph-bookmark::before{
  content:"";
  position:absolute;
  width:12px;
  height:15px;
  border:2px solid currentColor;
  border-radius:4px 4px 6px 6px;
  top:0;
  left:3px;
}
.action-glyph-bookmark::after{
  content:"";
  position:absolute;
  width:2px;
  height:6px;
  background:currentColor;
  bottom:1px;
  left:8px;
  transform:rotate(45deg);
  border-radius:2px;
}
.lang-pill{
  display:inline-block;
  margin:22px 0 0 4px;
  font-size:11px;
  letter-spacing:.18em;
  color:var(--text-sub);
  background:rgba(148,163,184,.08);
  padding:8px 14px;
  border-radius:var(--radius-pill);
  text-align:center;
}

.nav-toggle{
  display:none;
}

.site-footer{
  background:
    linear-gradient(180deg,rgba(8,21,39,.6),rgba(8,21,39,.98)),
    var(--bg-deep);
  border-top:1px solid rgba(212,183,122,.14);
  padding:80px var(--side-space) 36px;
  margin-left:var(--header-w);
  width:calc(100% - var(--header-w));
  position:relative;
}
.footer-inner{
  max-width:1220px;
  margin:0 auto;
}
.footer-waterline{
  position:absolute;
  top:-2px;
  left:6%;
  width:88%;
  height:4px;
  background:linear-gradient(90deg,transparent,var(--cyan-start),var(--cyan-end),var(--gold),transparent);
  border-radius:var(--radius-pill);
  opacity:.65;
}
.waterline-point{
  position:absolute;
  top:-6px;
  width:16px;
  height:16px;
  background:var(--cyan-start);
  border-radius:50%;
  box-shadow:0 0 0 rgba(168,218,220,.5);
}
.waterline-1{left:8%;animation:waterPulse 4s var(--ease) infinite}
.waterline-2{left:38%;animation:waterPulse 5s var(--ease) .8s infinite}
.waterline-3{left:66%;animation:waterPulse 6s var(--ease) 1.6s infinite}
.waterline-4{left:90%;background:var(--gold);animation:waterPulse 5s var(--ease) 2.4s infinite}
@keyframes waterPulse{
  0%,100%{opacity:.5;transform:scale(1)}
  50%{opacity:1;transform:scale(1.45)}
}
.footer-columns{
  display:grid;
  grid-template-columns:1.4fr 1fr 1.4fr;
  gap:48px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(168,218,220,.12);
}
.footer-col .brand-mark{
  margin-bottom:18px;
}
.footer-brief{
  color:var(--text-sub);
  font-size:14px;
  max-width:340px;
  letter-spacing:.02em;
}
.footer-title{
  font-family:var(--font-serif);
  font-size:18px;
  font-weight:700;
  color:var(--gold-bright);
  margin-bottom:20px;
  position:relative;
  padding-bottom:8px;
  letter-spacing:.06em;
}
.footer-title::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:34px;
  height:2px;
  background:linear-gradient(90deg,var(--gold),transparent);
  border-radius:2px;
}
.footer-links ul,
.footer-contact ul{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-links a{
  color:var(--text-main);
  font-size:15px;
  transition:color .3s var(--ease),padding-left .3s var(--ease);
}
.footer-links a:hover{
  color:var(--gold-bright);
  padding-left:4px;
}
.footer-contact ul{
  color:var(--text-sub);
  font-size:14px;
}
.footer-contact li{
  position:relative;
  padding-left:16px;
}
.footer-contact li::before{
  content:"";
  position:absolute;
  left:0;
  top:.7em;
  width:6px;
  height:6px;
  background:var(--cyan-start);
  border-radius:50%;
  opacity:.8;
}
.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-top:24px;
  color:var(--text-sub);
  font-size:13px;
}
.footer-icp{
  color:var(--gold);
  letter-spacing:.12em;
}
.trust-statement{
  color:var(--text-sub);
  font-size:13px;
  max-width:520px;
}

.container-content{
  max-width:1180px;
  margin:0 auto;
  padding:96px var(--side-space) 120px;
}
.section-index{
  font-family:var(--font-serif);
  font-weight:800;
  font-size:86px;
  line-height:.9;
  color:transparent;
  -webkit-text-stroke:1px rgba(212,183,122,.5);
  letter-spacing:.04em;
  user-select:none;
}
.page-hero{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:48px;
  align-items:center;
}
.card-surface{
  background:var(--bg-card);
  border:1px solid rgba(168,218,220,.12);
  border-radius:var(--radius-lg);
  padding:32px;
  box-shadow:var(--shadow-card);
  transition:border-color .4s var(--ease),transform .4s var(--ease),box-shadow .4s var(--ease);
}
.card-surface:hover{
  border-color:rgba(212,183,122,.5);
  transform:translateY(-6px);
  box-shadow:0 24px 60px rgba(8,21,39,.55),var(--shadow-gold);
}
.tag{
  display:inline-flex;
  align-items:center;
  padding:7px 16px;
  border-radius:var(--radius-pill);
  background:rgba(30,78,156,.35);
  color:var(--cyan-start);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  border:1px solid rgba(168,218,220,.2);
}
.tag-tianjin{
  background:linear-gradient(90deg,rgba(168,218,220,.22),rgba(107,180,196,.12));
  border-color:rgba(168,218,220,.28);
  color:var(--cyan-start);
}
.data-counter{
  display:flex;
  align-items:baseline;
  gap:10px;
}
.data-counter strong{
  font-family:var(--font-serif);
  font-size:56px;
  font-weight:900;
  color:var(--gold-bright);
  line-height:1;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:15px 30px;
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}
.btn-gold{
  background:linear-gradient(135deg,var(--gold),var(--gold-bright));
  color:#081527;
  box-shadow:0 10px 30px rgba(212,183,122,.25);
}
.btn-gold:hover{
  transform:translateY(-3px);
  box-shadow:0 16px 40px rgba(212,183,122,.38);
  color:#081527;
}
.btn-ghost{
  background:transparent;
  border:1px solid rgba(168,218,220,.4);
  color:var(--text-main);
}
.btn-ghost:hover{
  border-color:var(--gold-bright);
  background:rgba(30,78,156,.24);
  transform:translateY(-3px);
}
.timeline{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:24px;
  padding-left:32px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:9px;
  top:6px;
  width:2px;
  bottom:6px;
  background:linear-gradient(180deg,var(--cyan-start),var(--cyan-end),var(--gold));
  border-radius:2px;
  opacity:.55;
}
.timeline-item{
  position:relative;
}
.timeline-item::before{
  content:"";
  position:absolute;
  left:-28px;
  top:6px;
  width:14px;
  height:14px;
  border-radius:50%;
  background:var(--bg-card);
  border:2px solid var(--cyan-start);
  box-shadow:0 0 18px rgba(168,218,220,.4);
}
.back-to-top{
  position:fixed;
  right:28px;
  bottom:28px;
  z-index:900;
  width:48px;
  height:48px;
  border-radius:50%;
  background:rgba(17,34,64,.9);
  border:1px solid rgba(212,183,122,.5);
  color:var(--gold-bright);
  font-size:20px;
  line-height:1;
  opacity:0;
  visibility:hidden;
  transform:translateY(16px);
  transition:opacity .4s var(--ease),transform .4s var(--ease),visibility .4s;
  box-shadow:var(--shadow-card);
}
.back-to-top[data-visible="true"]{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.back-to-top:hover{
  background:rgba(212,183,122,.2);
  transform:translateY(-4px);
}

@media (max-width:960px){
  :root{
    --header-w:0px;
  }
  #main-content,
  .site-footer{
    margin-left:0;
    width:100%;
  }
  .site-header{
    width:100%;
    height:auto;
    min-height:72px;
    padding:0;
    border-right:none;
    border-bottom:1px solid rgba(212,183,122,.18);
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    backdrop-filter:blur(10px);
  }
  .header-rail{
    position:fixed;
    top:72px;
    left:0;
    width:100%;
    height:calc(100vh - 72px);
    background:rgba(8,21,39,.98);
    flex-direction:column;
    padding:36px 32px;
    overflow-y:auto;
    transform:translateX(-102%);
    transition:transform .45s var(--ease);
    backdrop-filter:blur(14px);
    z-index:1100;
  }
  .site-header[data-open] .header-rail{
    transform:translateX(0);
  }
  .site-header{
    padding:0 20px;
  }
  .header-rail .brand-mark{
    align-self:flex-start;
  }
  .brand-mark{
    padding:10px 14px;
  }
  .brand-cn{
    font-size:18px;
  }
  .nav-toggle{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:12px 16px;
    border-radius:var(--radius-pill);
    background:rgba(30,78,156,.35);
    border:1px solid rgba(168,218,220,.25);
    color:var(--text-main);
    font-size:14px;
    font-weight:600;
    z-index:1150;
  }
  .nav-toggle-line{
    display:block;
    width:16px;
    height:2px;
    background:currentColor;
    position:relative;
    transition:background .2s;
  }
  .nav-toggle-line::before,
  .nav-toggle-line::after{
    content:"";
    position:absolute;
    left:0;
    width:16px;
    height:2px;
    background:currentColor;
    transition:transform .4s var(--ease),top .4s var(--ease);
  }
  .nav-toggle-line::before{top:-5px}
  .nav-toggle-line::after{top:5px}
  .site-header[data-open] .nav-toggle-line{
    background:transparent;
  }
  .site-header[data-open] .nav-toggle-line::before{
    top:0;
    transform:rotate(45deg);
  }
  .site-header[data-open] .nav-toggle-line::after{
    top:0;
    transform:rotate(-45deg);
  }
  .lang-pill{
    margin-top:12px;
    align-self:flex-start;
  }
  .action-link{
    justify-content:center;
  }
  .footer-columns{
    grid-template-columns:1fr;
    gap:36px;
  }
  .footer-waterline{
    width:94%;
    left:3%;
  }
  .page-hero{
    grid-template-columns:1fr;
  }
}

@media (max-width:600px){
  .site-footer{
    padding:56px 20px 24px;
  }
  .footer-meta{
    flex-direction:column;
    align-items:flex-start;
  }
  .container-content{
    padding:64px 20px 80px;
  }
  .section-index{
    font-size:64px;
  }
}

@media (prefers-reduced-motion:reduce){
  html{
    scroll-behavior:auto;
  }
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}