/* ============================================================
   星投服务 · 共享样式 /assets/site.css
   夜间导航台框架：深空黑底 + 星蓝边框 + 信号橙动作 + 青绿状态
   ============================================================ */

:root{
  --c-bg:#070A12;
  --c-bg-2:#0D1424;
  --c-blue:#1E4C8A;
  --c-orange:#FF6B2C;
  --c-mint:#39F2C8;
  --c-white:#F4F8FF;
  --c-steel:#93A4BD;
  --c-teal:#0B3B40;
  --c-violet:#8B7BFF;
  --c-amber:#FFC857;

  --font-display:"Space Grotesk","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --line:1px solid rgba(30,76,138,.55);
  --line-soft:1px solid rgba(30,76,138,.32);
  --radius:14px;
  --radius-sm:8px;
  --maxw:1440px;
  --gutter:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}

body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.7;
  color:var(--c-white);
  background-color:var(--c-bg);
  background-image:
    radial-gradient(900px 620px at 88% -12%, rgba(30,76,138,.38), rgba(7,10,18,0) 70%),
    radial-gradient(720px 520px at -8% 18%, rgba(139,123,255,.14), rgba(7,10,18,0) 66%),
    radial-gradient(760px 520px at 50% 108%, rgba(11,59,64,.55), rgba(7,10,18,0) 72%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.18;
}
h1{font-size:clamp(34px,5.2vw,68px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(19px,2vw,24px);font-weight:700;line-height:1.32}
h4{font-size:17px;font-weight:700;line-height:1.4}

p{max-width:72ch}
strong{font-weight:700;color:var(--c-white)}

a{color:inherit;text-decoration:none;transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease)}

code,kbd,samp,.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

:focus-visible{
  outline:2px solid var(--c-mint);
  outline-offset:3px;
  border-radius:4px;
}

::selection{background:rgba(57,242,200,.28);color:var(--c-white)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:12px;
  left:16px;
  z-index:300;
  transform:translateY(-160%);
  padding:10px 18px;
  border-radius:var(--radius-sm);
  background:var(--c-mint);
  color:#04120F;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  transition:transform .16s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0);outline:2px solid var(--c-white);outline-offset:2px}

/* ---------- 页头框架 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(13,20,36,.94);
  border-bottom:var(--line);
  box-shadow:inset 0 1px 0 rgba(244,248,255,.06);
  backdrop-filter:blur(10px);
  transition:background-color .16s var(--ease),box-shadow .16s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(7,10,18,.97);
  box-shadow:0 12px 34px rgba(0,0,0,.5),inset 0 1px 0 rgba(244,248,255,.05);
}

.header-grid{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:12px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:72px;
}

/* ---------- 品牌锁定区 ---------- */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  padding:6px 8px 6px 6px;
  border:1px solid transparent;
  border-radius:10px;
}
.brand:hover,
.brand:focus-visible{border-color:rgba(57,242,200,.4);background:rgba(30,76,138,.22)}
.brand-mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  flex:0 0 38px;
  border-radius:10px;
  border:1px solid rgba(57,242,200,.5);
  background:linear-gradient(150deg,rgba(30,76,138,.95),rgba(11,59,64,.95));
  color:var(--c-mint);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
}
.brand-text{display:flex;flex-direction:column;gap:2px}
.brand-name{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  letter-spacing:.01em;
  line-height:1.15;
  color:var(--c-white);
}
.brand-line{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.16em;
  line-height:1.3;
  color:var(--c-steel);
  text-transform:uppercase;
}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border:1px solid rgba(30,76,138,.9);
  border-radius:var(--radius-sm);
  background:rgba(30,76,138,.24);
  color:var(--c-white);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  cursor:pointer;
  transition:border-color .16s var(--ease),background-color .16s var(--ease);
}
.nav-toggle:hover{border-color:var(--c-mint);background:rgba(30,76,138,.4)}
.nav-toggle-bars{display:flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-bar{
  display:block;
  height:2px;
  width:100%;
  background:var(--c-mint);
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--c-orange);background:rgba(255,107,44,.16)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child{transform:translateY(-3px) rotate(-45deg)}
.nav-toggle-label{line-height:1}

/* ---------- 主导航 ---------- */
.site-nav{
  display:flex;
  align-items:center;
  gap:18px;
  flex:1 1 auto;
  justify-content:flex-end;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-item{flex:0 0 auto}
.nav-link{
  display:block;
  padding:7px 11px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  color:var(--c-white);
}
.nav-link:hover{
  border-color:rgba(30,76,138,.95);
  background:rgba(30,76,138,.3);
  color:var(--c-white);
}
.nav-index{
  display:block;
  font-family:var(--font-mono);
  font-size:9.5px;
  font-weight:500;
  letter-spacing:.2em;
  line-height:1;
  color:var(--c-steel);
  transition:color .16s var(--ease);
}
.nav-name{
  display:block;
  margin-top:4px;
  font-size:13.5px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.01em;
  white-space:nowrap;
}
.nav-link[aria-current="page"]{
  border-color:rgba(57,242,200,.55);
  background:rgba(57,242,200,.1);
  color:var(--c-mint);
}
.nav-link[aria-current="page"] .nav-index{color:var(--c-orange)}
.nav-link[aria-current="page"] .nav-name{color:var(--c-mint)}

.nav-foot{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.nav-note{display:none}

/* ---------- 滚动进度条 ---------- */
.scroll-meter{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  overflow:hidden;
  background:rgba(30,76,138,.25);
  pointer-events:none;
}
.scroll-meter-fill{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(var(--scroll-progress,0));
  transform-origin:left center;
  background:linear-gradient(90deg,var(--c-blue),var(--c-mint) 62%,var(--c-orange));
  transition:transform .12s linear;
}

/* ---------- 通用容器与章节 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
}

.section{padding:64px 0}
.section--tight{padding:40px 0}
.section-head{display:flex;flex-direction:column;gap:14px;margin-bottom:32px;max-width:820px}
.section-title{color:var(--c-white)}
.section-lede{color:var(--c-steel);font-size:17px;line-height:1.75;max-width:64ch}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-mint);
}
.eyebrow::before{
  content:"";
  display:block;
  width:7px;
  height:7px;
  background:var(--c-orange);
  border-radius:2px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius-sm);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.01em;
  cursor:pointer;
  text-align:center;
  transition:background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.btn-primary{
  background:var(--c-orange);
  color:#180A03;
  border-color:var(--c-orange);
}
.btn-primary:hover,
.btn-primary:focus-visible{
  background:#FF8A55;
  border-color:#FF8A55;
  color:#180A03;
  transform:translateY(-1px);
}
.btn-ghost{
  background:rgba(30,76,138,.22);
  color:var(--c-white);
  border-color:rgba(30,76,138,.95);
}
.btn-ghost:hover,
.btn-ghost:focus-visible{
  border-color:var(--c-mint);
  color:var(--c-mint);
  background:rgba(30,76,138,.38);
  transform:translateY(-1px);
}
.btn-sm{padding:8px 15px;font-size:13px;border-radius:6px}
.btn-block{width:100%}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin:22px 0 0}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--c-steel);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item:not(:first-child)::before{content:"/";color:rgba(147,164,189,.55)}
.breadcrumb-link{color:var(--c-steel)}
.breadcrumb-link:hover{color:var(--c-mint)}
.breadcrumb-current{color:var(--c-white)}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:24px;grid-template-columns:minmax(0,1fr)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:22px;
  border:var(--line);
  border-radius:var(--radius);
  background:linear-gradient(170deg,rgba(13,20,36,.96),rgba(7,10,18,.92));
  transition:border-color .16s var(--ease),background-color .16s var(--ease),transform .16s var(--ease);
}
.card:hover{border-color:rgba(57,242,200,.45);transform:translateY(-2px)}
.card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;flex-wrap:wrap}
.card-title{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:700;
  line-height:1.3;
  color:var(--c-white);
}
.card-body{display:flex;flex-direction:column;gap:10px;color:var(--c-steel);font-size:15px;line-height:1.7}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid rgba(147,164,189,.45);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.16em;
  line-height:1.6;
  text-transform:uppercase;
  color:var(--c-steel);
  white-space:nowrap;
}
.tag--mint{color:var(--c-mint);border-color:rgba(57,242,200,.5);background:rgba(57,242,200,.09)}
.tag--orange{color:var(--c-orange);border-color:rgba(255,107,44,.5);background:rgba(255,107,44,.1)}
.tag--amber{color:var(--c-amber);border-color:rgba(255,200,87,.5);background:rgba(255,200,87,.1)}

/* ---------- 全宽数据带 ---------- */
.data-band{
  width:100%;
  padding:44px 0;
  border-top:1px solid rgba(57,242,200,.28);
  border-bottom:1px solid rgba(57,242,200,.28);
  background:linear-gradient(180deg,rgba(11,59,64,.92),rgba(11,59,64,.6));
}
.data-band .eyebrow{color:var(--c-amber)}

/* ---------- 阅读栏 ---------- */
.prose{
  max-width:74ch;
  font-size:17px;
  line-height:1.8;
  color:rgba(244,248,255,.9);
}
.prose p+p{margin-top:1em}
.prose h2{margin-top:1.7em;margin-bottom:.6em;font-size:clamp(23px,2.6vw,32px)}
.prose h3{margin-top:1.5em;margin-bottom:.5em}
.prose ul,.prose ol{margin:1em 0;padding-left:1.3em;list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.45em}
.prose a{color:var(--c-mint);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--c-amber)}
.prose strong{color:var(--c-white)}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border:var(--line-soft);
  border-radius:16px;
  background:
    radial-gradient(120% 90% at 22% 8%, rgba(30,76,138,.5), rgba(7,10,18,.92) 72%),
    linear-gradient(180deg,rgba(13,20,36,.9),rgba(7,10,18,.98));
  aspect-ratio:4/3;
}
.media-frame img,
.media-frame video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:inherit;
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-steel);
}

/* ---------- 进入视口显现 ---------- */
html.is-js [data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease);
}
html.is-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:72px;
  border-top:var(--line);
  background:linear-gradient(180deg,rgba(13,20,36,.98),rgba(7,10,18,1));
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:132px;
  height:2px;
  background:linear-gradient(90deg,var(--c-orange),rgba(255,107,44,0));
}
.footer-grid{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:56px var(--gutter) 34px;
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.4fr;
  gap:36px;
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start}
.footer-brand-name{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.3;
  color:var(--c-white);
  max-width:22ch;
}
.footer-scope{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-mint);
}
.footer-note{
  margin-top:14px;
  font-size:13px;
  line-height:1.65;
  color:var(--c-steel);
  max-width:34ch;
}
.footer-brand .btn{margin-top:18px}

.footer-col{display:flex;flex-direction:column;min-width:0}
.footer-col-title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-steel);
}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-block;
  font-size:14px;
  line-height:1.5;
  color:rgba(244,248,255,.86);
  border-bottom:1px solid transparent;
  padding-bottom:1px;
}
.footer-link:hover,
.footer-link:focus-visible{color:var(--c-mint);border-bottom-color:rgba(57,242,200,.55)}

.footer-contact{gap:14px}
.footer-contact-item{display:flex;flex-direction:column;gap:3px}
.footer-contact-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-steel);
}
.footer-contact-value{
  font-size:14px;
  line-height:1.55;
  color:var(--c-white);
  overflow-wrap:anywhere;
}
.footer-col--contact .footer-note{max-width:38ch}

.footer-base{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:18px var(--gutter) 40px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  border-top:var(--line-soft);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--c-steel);
}
.footer-legal{color:var(--c-steel)}
.footer-copy{color:rgba(244,248,255,.78)}
.footer-tag{
  color:rgba(57,242,200,.85);
  letter-spacing:.14em;
}

/* ---------- 平板 ---------- */
@media (max-width:1180px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:30px}
  .footer-col--contact{grid-column:1 / -1}
}

@media (max-width:1023px){
  :root{--gutter:20px}
  .nav-toggle{display:inline-flex}
  .header-grid{min-height:64px;padding:10px var(--gutter)}
  .site-header{position:sticky}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:14px var(--gutter) 22px;
    max-height:calc(100vh - 66px);
    overflow-y:auto;
    background:rgba(13,20,36,.995);
    border-bottom:var(--line);
    box-shadow:0 26px 44px rgba(0,0,0,.55);
  }
  .site-nav[data-open="true"]{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;width:100%}
  .nav-item{width:100%}
  .nav-link{
    display:flex;
    align-items:baseline;
    gap:12px;
    padding:12px 14px;
    border:1px solid transparent;
    border-left:2px solid transparent;
    border-radius:var(--radius-sm);
  }
  .nav-index{font-size:11px;letter-spacing:.18em;min-width:22px}
  .nav-name{margin-top:0;font-size:15px;white-space:normal}
  .nav-link[aria-current="page"]{border-left-color:var(--c-mint);border-radius:var(--radius-sm)}
  .nav-foot{
    flex-direction:column;
    align-items:flex-start;
    gap:10px;
    margin-top:14px;
    padding-top:16px;
    border-top:var(--line-soft);
  }
  .nav-foot .btn{width:100%}
  .nav-note{
    display:block;
    font-family:var(--font-mono);
    font-size:11px;
    letter-spacing:.1em;
    color:var(--c-steel);
    line-height:1.6;
    max-width:none;
  }
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding-top:44px}
  .footer-brand{grid-column:1 / -1}
  .footer-col--contact{grid-column:1 / -1}
}

/* ---------- 手机 ---------- */
@media (max-width:640px){
  :root{--gutter:18px}
  body{font-size:16px}
  .header-grid{min-height:60px;gap:12px}
  .brand-mark{width:34px;height:34px;flex-basis:34px;font-size:12px}
  .brand-name{font-size:16px}
  .brand-line{font-size:9px;letter-spacing:.12em}
  .nav-toggle{padding:8px 11px;font-size:10px;gap:8px}
  .section{padding:44px 0}
  .section--tight{padding:32px 0}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .grid{gap:18px}
  .card{padding:18px}
  .data-band{padding:34px 0}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px;padding:38px var(--gutter) 28px}
  .footer-base{flex-direction:column;align-items:flex-start;gap:8px;padding-bottom:32px}
  .btn{padding:12px 18px}
  .site-footer{margin-top:52px}
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .scroll-meter-fill{transition:none}
  html.is-js [data-reveal]{opacity:1;transform:none}
  .card:hover,
  .btn:hover,
  .btn:focus-visible{transform:none}
}