/* ================= 1. 设计变量 ================= */
:root{
  --ink:#071426;
  --panel:#0D2138;
  --lift:#16334F;
  --cyan:#2BE7D0;
  --cyan-line:#A6FFF4;
  --amber:#FFB547;
  --amber-soft:#FFE0A3;
  --red:#FF5C6C;
  --paper:#EAF3F8;
  --mist:#8FA9BD;
  --green:#6FE3A1;
  --cut:14px;
  --shell-w:1240px;
  --gutter:clamp(18px,4vw,40px);
  --line:rgba(166,255,244,.16);
  --line-soft:rgba(166,255,244,.09);
  --font-sans:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

/* ================= 2. 重置与页面底纹 ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(60% 45% at 12% -10%, rgba(43,231,208,.13), transparent 62%),
    radial-gradient(48% 38% at 94% -2%, rgba(255,181,71,.10), transparent 60%),
    radial-gradient(70% 50% at 50% 108%, rgba(22,51,79,.6), transparent 72%),
    repeating-linear-gradient(90deg, rgba(166,255,244,.05) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(166,255,244,.04) 0 1px, transparent 1px 96px);
}
img,svg{max-width:100%}
img{height:auto}
ul,ol{margin:0;padding:0;list-style:none}
dl,dd,figure{margin:0}
button{font:inherit}
::selection{background:rgba(43,231,208,.32);color:#fff}

/* ================= 3. 中文排版与链接 ================= */
h1,h2,h3,h4{
  margin:0 0 .55em;
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.012em;
  color:#fff;
}
h1{font-size:clamp(30px,4.6vw,56px)}
h2{font-size:clamp(24px,2.9vw,38px)}
h3{font-size:clamp(18px,2vw,23px)}
p{margin:0 0 1.05em}
p:last-child{margin-bottom:0}
a{color:var(--cyan);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--cyan-line)}
strong{color:#fff;font-weight:700}
:where(a,button,[tabindex]):focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px}

.skip-link{
  position:absolute;
  left:50%;
  top:-72px;
  transform:translateX(-50%);
  z-index:200;
  padding:10px 20px;
  background:var(--amber);
  color:#181004;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  text-decoration:none;
  transition:top .18s ease;
}
.skip-link:focus{top:10px;color:#181004}

/* ================= 4. 布局与通用件 ================= */
.shell{width:min(calc(100% - var(--gutter) * 2),var(--shell-w));margin-inline:auto}
.site-main{position:relative;z-index:1}
.section{position:relative;padding:clamp(44px,6vw,80px) 0}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:28px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent)}
.lede{max-width:44ch;font-size:clamp(16.5px,1.6vw,19px);line-height:1.85;color:#C6DAE7}
.mono{font-family:var(--font-mono);font-size:.92em;letter-spacing:.05em;color:var(--mist)}
.divider{height:1px;border:0;margin:0;background:linear-gradient(90deg,rgba(166,255,244,.32),rgba(166,255,244,0))}

.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:linear-gradient(165deg,var(--panel),#0A1B2E 72%);
  border:1px solid var(--line);
}
.panel--cut{
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.panel--accent{border-top:2px solid var(--cyan)}
.panel--accent::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:56px;height:2px;
  background:var(--amber);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--cyan-line);
  background:rgba(43,231,208,.08);
  border:1px solid rgba(166,255,244,.28);
}
.tag--amber{color:var(--amber-soft);background:rgba(255,181,71,.1);border-color:rgba(255,181,71,.42)}
.tag--red{color:#FFD3D8;background:rgba(255,92,108,.12);border-color:rgba(255,92,108,.42)}
.tag--green{color:#C9FFDF;background:rgba(111,227,161,.12);border-color:rgba(111,227,161,.42)}

.stat{display:flex;flex-direction:column;gap:4px}
.stat__num{
  font-family:var(--font-mono);
  font-size:clamp(26px,3.6vw,42px);
  font-weight:600;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--amber);
}
.stat__label{font-size:13px;letter-spacing:.06em;color:var(--mist)}

.grid{display:grid;gap:clamp(16px,2.4vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--aside{grid-template-columns:minmax(0,1fr) minmax(0,.62fr);align-items:start}

.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid rgba(166,255,244,.2);
  background-color:var(--panel);
  background-image:
    linear-gradient(145deg,rgba(43,231,208,.16),rgba(7,20,38,.92) 55%,rgba(255,181,71,.14)),
    repeating-linear-gradient(0deg,rgba(166,255,244,.12) 0 1px,transparent 1px 30px),
    repeating-linear-gradient(90deg,rgba(166,255,244,.12) 0 1px,transparent 1px 30px);
}
.media-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.62) contrast(1.06) brightness(.9);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(190deg,rgba(7,20,38,.1),rgba(7,20,38,.78));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1}

.crumbs{
  position:relative;
  z-index:1;
  padding-top:20px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.crumbs ol{display:flex;flex-wrap:wrap;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li + li::before{content:"/";color:rgba(166,255,244,.34)}
.crumbs a{color:var(--mist);text-decoration:none}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--amber)}

.anchor-bar{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  padding:12px 0;
  border-top:1px dashed var(--line);
  border-bottom:1px dashed var(--line);
  font-family:var(--font-mono);
  font-size:12px;
}
.anchor-bar__link{
  padding:4px 11px;
  color:var(--cyan-line);
  text-decoration:none;
  letter-spacing:.08em;
  border:1px solid rgba(166,255,244,.22);
}
.anchor-bar__link:hover{background:rgba(43,231,208,.14);color:#fff;border-color:var(--cyan)}
.anchor-bar__link[aria-current="true"]{background:rgba(255,181,71,.14);color:var(--amber-soft);border-color:rgba(255,181,71,.5)}

[data-reveal]{opacity:0;transform:translateY(10px);transition:opacity .45s ease,transform .45s ease}
[data-reveal].is-in{opacity:1;transform:none}

/* ================= 5. 按钮 ================= */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  padding:.72em 1.15em;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:2px;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--primary{
  color:#1B1204;
  background:linear-gradient(120deg,var(--amber),#FF9A2E);
  border-color:rgba(255,224,163,.55);
  box-shadow:0 12px 28px -20px rgba(255,181,71,.95);
}
.btn--primary:hover{color:#140D02;background:linear-gradient(120deg,#FFC76B,var(--amber))}
.btn--ghost{
  color:var(--cyan-line);
  background:rgba(43,231,208,.07);
  border-color:rgba(166,255,244,.32);
}
.btn--ghost:hover{color:#fff;background:rgba(43,231,208,.16);border-color:var(--cyan)}
.btn--sm{padding:.48em .9em;font-size:11.5px}

/* ================= 6. 刊头 header ================= */
.site-header{position:relative;z-index:60}

.head-rail{
  border-bottom:1px dashed var(--line);
  background:linear-gradient(90deg,rgba(43,231,208,.06),rgba(7,20,38,0) 38%,rgba(255,181,71,.06));
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--mist);
}
.head-rail__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:36px;
}
.rail-label{display:inline-flex;align-items:center;gap:9px;margin:0;color:var(--cyan-line)}
.rail-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--red);
  animation:railPulse 2.8s ease-out infinite;
}
@keyframes railPulse{
  0%{box-shadow:0 0 0 0 rgba(255,92,108,.55)}
  70%{box-shadow:0 0 0 8px rgba(255,92,108,0)}
  100%{box-shadow:0 0 0 0 rgba(255,92,108,0)}
}
.rail-list{display:flex;gap:20px;margin:0}
.rail-list li{white-space:nowrap}
.rail-link{
  color:var(--amber-soft);
  text-decoration:none;
  border-bottom:1px solid rgba(255,181,71,.4);
  padding-bottom:1px;
}
.rail-link:hover{color:#fff;border-bottom-color:var(--amber)}

.masthead{padding:20px 0 18px}
.masthead__inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:18px;
}
.masthead__kicker{
  margin:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--mist);
}
.masthead__brand{display:inline-block;justify-self:center;text-align:center;text-decoration:none;color:var(--paper)}
.masthead__cn{
  display:block;
  font-size:clamp(28px,3.8vw,42px);
  font-weight:800;
  letter-spacing:.1em;
  line-height:1.1;
  color:#fff;
}
.masthead__en{
  display:block;
  margin-top:6px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.42em;
  text-transform:uppercase;
  color:var(--cyan);
}
.masthead__brand:hover .masthead__cn{color:var(--cyan-line)}
.masthead__tagline{
  margin:0;
  justify-self:end;
  text-align:right;
  max-width:16em;
  font-size:13px;
  line-height:1.6;
  color:var(--mist);
}

.nav-bar{
  position:relative;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(13,33,56,.92),rgba(7,20,38,.96));
}
.nav-bar__inner{display:flex;align-items:center;gap:14px;min-height:58px}
.nav-list{display:flex;flex:1 1 auto;justify-content:center;gap:2px}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:8px;
  padding:11px 13px;
  font-size:15px;
  line-height:1.3;
  color:var(--paper);
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:color .16s ease,background .16s ease,border-color .16s ease;
}
.nav-num{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--amber);
}
.nav-link:hover{color:var(--cyan);background:rgba(43,231,208,.07);border-bottom-color:rgba(43,231,208,.5)}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  border-bottom-color:var(--cyan);
  background:linear-gradient(180deg,rgba(43,231,208,.16),rgba(43,231,208,.02));
}
.nav-link[aria-current="page"] .nav-num{color:var(--cyan-line)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  color:var(--cyan-line);
  background:rgba(43,231,208,.08);
  border:1px solid rgba(166,255,244,.3);
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  cursor:pointer;
}
.nav-toggle:hover{background:rgba(43,231,208,.16);color:#fff}
.nav-toggle__bars{display:grid;gap:3px;width:16px}
.nav-toggle__bars > span{display:block;height:2px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.nav-progress{
  position:absolute;
  left:0;bottom:-1px;
  width:100%;height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  pointer-events:none;
  transition:transform .12s linear;
}

.header-dock{
  position:fixed;
  top:0;left:0;right:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(7,20,38,.98),rgba(9,26,46,.94));
  border-bottom:1px solid var(--line);
  box-shadow:0 22px 44px -36px #000;
  transform:translateY(-104%);
  visibility:hidden;
  transition:transform .34s cubic-bezier(.2,.7,.3,1),visibility .34s;
}
.header-dock[data-visible]{transform:translateY(0);visibility:visible}
.header-dock__inner{display:flex;align-items:center;gap:16px;min-height:56px}
.header-dock__brand{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-size:17px;
  font-weight:800;
  letter-spacing:.08em;
  color:#fff;
  text-decoration:none;
}
.header-dock__en{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.26em;
  color:var(--mist);
}
.header-dock__help{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--cyan-line);
  text-decoration:none;
  padding-bottom:2px;
  border-bottom:1px solid rgba(166,255,244,.35);
}
.header-dock__help:hover{color:#fff;border-bottom-color:var(--amber)}

/* ================= 7. 页脚 footer ================= */
.site-footer{position:relative;z-index:1;margin-top:clamp(40px,6vw,80px)}
.footer-top{
  border-top:1px solid rgba(166,255,244,.22);
  background:
    linear-gradient(180deg,rgba(13,33,56,.72),rgba(7,20,38,.9)),
    radial-gradient(60% 100% at 8% 0%,rgba(43,231,208,.1),transparent 62%);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .7fr .7fr 1.1fr;
  gap:clamp(20px,3vw,42px);
  padding:clamp(36px,5vw,60px) 0 clamp(30px,4vw,46px);
}
.footer-brand__cn{margin:0;font-size:22px;font-weight:800;letter-spacing:.12em;color:#fff}
.footer-brand__en{
  margin:6px 0 14px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-note{max-width:34ch;font-size:13.5px;line-height:1.85;color:var(--mist)}
.footer-col__title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-links{display:grid;gap:8px;font-size:14.5px}
.footer-links a{
  display:inline-block;
  padding-left:0;
  color:var(--paper);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color .16s ease,padding-left .16s ease,border-color .16s ease;
}
.footer-links a:hover{color:var(--cyan);padding-left:10px;border-left-color:var(--amber)}

.contact-list{display:grid;gap:10px;font-size:13.5px}
.contact-row{display:grid;grid-template-columns:44px minmax(0,1fr);gap:10px;align-items:start}
.contact-label{
  margin:0;
  padding-top:3px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
}
.contact-value{margin:0;line-height:1.7;color:var(--paper);word-break:break-word}

.footer-help{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line-soft);
  background:linear-gradient(100deg,rgba(43,231,208,.12),rgba(13,33,56,.9) 52%,rgba(255,181,71,.1));
}
.footer-help__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:18px 0;
}
.footer-help__text{
  margin:0;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--amber-soft);
}

.footer-legal{border-top:1px solid var(--line-soft);background:rgba(4,12,24,.72)}
.footer-legal__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding:16px 0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--mist);
}
.footer-legal__copy,.footer-legal__icp{margin:0}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:18px}
.footer-legal__links a{
  color:var(--mist);
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.footer-legal__links a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* ================= 8. 响应式 ================= */
@media (max-width:1100px){
  .nav-link{padding:10px 9px;font-size:14px}
  .nav-num{font-size:10px}
  .masthead__tagline{max-width:13em;font-size:12.5px}
}

@media (max-width:900px){
  .head-rail__inner{flex-wrap:wrap;justify-content:flex-start;gap:8px 16px;padding-block:8px}
  .rail-list{display:none}

  .masthead{padding:16px 0 14px}
  .masthead__inner{grid-template-columns:1fr;gap:8px;justify-items:center}
  .masthead__kicker{order:2;font-size:10.5px;letter-spacing:.2em}
  .masthead__tagline{order:3;justify-self:center;text-align:center;max-width:22em}

  .nav-bar__inner{flex-wrap:wrap;min-height:54px;padding-block:8px}
  .nav-toggle{display:inline-flex;order:1}
  .nav-actions{order:2;margin-left:auto}
  .nav-list{
    order:3;
    flex-basis:100%;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    max-height:0;
    opacity:0;
    visibility:hidden;
    overflow:hidden;
    transition:max-height .34s ease,opacity .24s ease,visibility .34s ease;
  }
  .nav-list[data-open]{
    max-height:min(66vh,540px);
    overflow-y:auto;
    opacity:1;
    visibility:visible;
  }
  .nav-list > li{border-top:1px solid var(--line-soft)}
  .nav-list > li:first-child{border-top:0}
  .nav-link{padding:14px 10px;font-size:15px;border-bottom:0;border-left:2px solid transparent}
  .nav-link:hover{border-left-color:rgba(43,231,208,.5)}
  .nav-link[aria-current="page"]{
    border-bottom:0;
    border-left-color:var(--cyan);
    background:linear-gradient(90deg,rgba(43,231,208,.16),rgba(43,231,208,0));
  }

  .header-dock__en{display:none}
  .header-dock__inner{gap:12px;min-height:52px}
  .header-dock__help{font-size:11px}

  .grid--2,.grid--3,.grid--aside{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-brand{grid-column:1 / -1}
  .footer-note{max-width:46ch}
}

@media (max-width:600px){
  .masthead__cn{font-size:26px;letter-spacing:.06em}
  .masthead__en{letter-spacing:.3em;font-size:10px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-help__inner{flex-direction:column;align-items:flex-start}
  .footer-legal__inner{flex-direction:column;align-items:flex-start;gap:8px}
  .footer-legal__links{gap:14px}
  .header-dock .btn--sm{display:none}
  .contact-row{grid-template-columns:40px minmax(0,1fr)}
}

/* ================= 9. 动效偏好 ================= */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .rail-dot{animation:none;box-shadow:0 0 0 3px rgba(255,92,108,.18)}
  .header-dock{transition:none}
}