/* =========================================================
   626在线登录 · 共享样式 /assets/site.css
   夜间控制台 · 入口面板 · 粗野主义导视
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --ink:#06121F;
  --ink-2:#0B1E33;
  --panel:#102A44;
  --snow:#E8F4FF;
  --mist:#9FB6C9;
  --cyan:#19E0D2;
  --coral:#FF6B4A;
  --gold:#F5C26B;
  --line:#2A4A66;
  --pale:#BFE9E6;

  --font-display:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --w-max:1440px;
  --pad-x:clamp(20px,5vw,96px);
  --radius:2px;
  --shadow-hard:6px 6px 0 rgba(0,0,0,.45);
  --shadow-hard-sm:3px 3px 0 rgba(0,0,0,.55);
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
}
body{
  margin:0;
  min-height:100%;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--snow);
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 84% -8%, rgba(25,224,210,.10), transparent 68%),
    radial-gradient(760px 460px at 3% 2%, rgba(255,107,74,.07), transparent 70%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;}
a{color:var(--cyan);text-underline-offset:3px;}
p{margin:0 0 1em;}
ul,ol{margin-top:0;}
::selection{background:var(--cyan);color:var(--ink);}

/* ---------- 3. 排版基元 ---------- */
h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.08;
  letter-spacing:-.02em;
  color:var(--snow);
}
.display{
  font-size:clamp(40px,6.2vw,88px);
  line-height:1.02;
  letter-spacing:-.035em;
  margin:0 0 .4em;
}
.heading{
  font-size:clamp(26px,3.4vw,48px);
  line-height:1.1;
  margin:0 0 .5em;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--coral);flex:0 0 auto;}
.lede{
  max-width:62ch;
  font-size:clamp(17px,1.4vw,20px);
  line-height:1.7;
  color:rgba(232,244,255,.84);
  margin:0 0 1.2em;
}
.coord{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(159,182,201,.75);
}
.rule{
  border:0;
  height:1px;
  margin:clamp(28px,4vw,48px) 0;
  background:linear-gradient(90deg,var(--line),rgba(42,74,102,0));
}
.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.78;
  color:rgba(232,244,255,.86);
}
.prose h2,.prose h3{margin:1.6em 0 .6em;font-size:clamp(21px,2.2vw,28px);}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em;}
.prose li{margin-bottom:.45em;}
.prose a{color:var(--cyan);}
.prose strong{color:var(--snow);}

/* ---------- 4. 布局 ---------- */
.container{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
.section{padding-block:clamp(44px,7vw,104px);}
.section--tight{padding-block:clamp(28px,4vw,56px);}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,28px);
}
.span-4{grid-column:span 4;}
.span-6{grid-column:span 6;}
.span-8{grid-column:span 8;}
.span-12{grid-column:span 12;}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 20px;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:800;
  line-height:1;
  letter-spacing:.02em;
  text-decoration:none;
  border:2px solid transparent;
  border-radius:var(--radius);
  cursor:pointer;
  transition:transform .16s ease,box-shadow .16s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn--primary{
  background:var(--coral);
  color:#06121F;
  box-shadow:var(--shadow-hard-sm);
}
.btn--primary:hover{
  background:#FF8264;
  transform:translate(-1px,-1px);
  box-shadow:4px 4px 0 rgba(0,0,0,.55);
}
.btn--cyan{
  background:var(--cyan);
  color:#04101B;
  box-shadow:var(--shadow-hard-sm);
}
.btn--cyan:hover{background:var(--pale);transform:translate(-1px,-1px);}
.btn--ghost{
  background:transparent;
  color:var(--snow);
  border-color:var(--line);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(25,224,210,.08);}
.btn--sm{padding:9px 14px;font-size:13px;}

/* ---------- 6. 标签 / 面板 / 图片容器 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--mist);
  background:rgba(16,42,68,.7);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.tag--cyan{color:var(--cyan);border-color:rgba(25,224,210,.45);background:rgba(25,224,210,.08);}
.tag--coral{color:var(--coral);border-color:rgba(255,107,74,.45);background:rgba(255,107,74,.08);}
.tag--gold{color:var(--gold);border-color:rgba(245,194,107,.45);background:rgba(245,194,107,.08);}

.surface{
  position:relative;
  padding:clamp(20px,2.6vw,32px);
  background:linear-gradient(160deg,rgba(16,42,68,.94),rgba(11,30,51,.94));
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard);
}
.surface--cut{
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--ink-2);
  border:2px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard);
}
.media-frame > img,
.media-frame > picture > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(6,18,31,.12),rgba(6,18,31,.58));
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-caption{
  margin:10px 0 0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:rgba(159,182,201,.8);
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb{margin:0 0 clamp(18px,2.4vw,28px);}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--mist);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--line);}
.breadcrumb-link{color:var(--mist);text-decoration:none;border-bottom:1px solid transparent;}
.breadcrumb-link:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.breadcrumb-item[aria-current="page"]{color:var(--snow);}

/* ---------- 8. 头部 ---------- */
.skip-link{
  position:fixed;
  top:-90px;
  left:16px;
  z-index:200;
  padding:12px 18px;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:800;
  color:var(--ink);
  background:var(--cyan);
  border-radius:var(--radius);
  text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{top:12px;}

.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .28s ease,border-color .28s ease,box-shadow .28s ease;
}
.site-header[data-scrolled="true"]{
  background:rgba(6,18,31,.96);
  border-bottom-color:var(--line);
  box-shadow:0 18px 40px -30px #000;
  backdrop-filter:saturate(150%) blur(10px);
}

.status-strip{
  background:rgba(6,18,31,.55);
  border-bottom:1px solid rgba(42,74,102,.55);
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.4;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--mist);
  transition:background-color .28s ease,border-color .28s ease;
}
.site-header[data-scrolled="true"] .status-strip{background:transparent;}
.status-strip-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-block:7px;
}
.status-dot{
  width:7px;
  height:7px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(25,224,210,.16),0 0 10px rgba(25,224,210,.7);
  animation:statusPulse 3s ease-in-out infinite;
}
@keyframes statusPulse{
  0%,100%{opacity:1;transform:scale(1);}
  50%{opacity:.45;transform:scale(.78);}
}
.status-item{white-space:nowrap;}
.status-item--muted{color:rgba(159,182,201,.66);}
.status-sep{color:rgba(42,74,102,.95);}

.header-bar{position:relative;}
.header-inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,32px);
  padding-block:clamp(10px,1.4vw,18px);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--snow);
  text-decoration:none;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:.01em;
  color:#04101B;
  background:linear-gradient(150deg,var(--cyan) 0%,#0FB9AE 100%);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand-mark--lg{width:56px;height:56px;font-size:17px;}
.brand-text{display:flex;flex-direction:column;gap:3px;min-width:0;}
.brand-title{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--snow);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  line-height:1.2;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--mist);
}

.nav{
  flex:1 1 auto;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:8px;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
  list-style:none;
}
.nav-link{
  display:inline-block;
  padding:9px 12px;
  font-family:var(--font-body);
  font-size:13.5px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.01em;
  color:rgba(232,244,255,.78);
  text-decoration:none;
  border:1px solid transparent;
  border-radius:var(--radius);
  transition:color .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.nav-link:hover{
  color:var(--snow);
  background:rgba(16,42,68,.9);
  border-color:var(--line);
}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  background:rgba(25,224,210,.10);
  border-color:rgba(25,224,210,.42);
  box-shadow:inset 0 -2px 0 var(--cyan);
}
.nav-cta{display:none;}

.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  margin-left:clamp(8px,1.4vw,18px);
}
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;
  height:44px;
  padding:0;
  background:rgba(16,42,68,.9);
  border:2px solid var(--line);
  border-radius:var(--radius);
  cursor:pointer;
  transition:border-color .2s ease,background-color .2s ease;
}
.nav-toggle:hover{border-color:var(--cyan);}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:var(--snow);
  box-shadow:0 -6px 0 var(--snow),0 6px 0 var(--snow);
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  inset:0;
  background:transparent;
  transition:transform .2s ease,background-color .2s ease;
}
.site-header[data-open="true"] .nav-toggle-bars{
  background:transparent;
  box-shadow:none;
  transform:rotate(45deg);
}
.site-header[data-open="true"] .nav-toggle-bars::after{
  background:var(--cyan);
  transform:rotate(90deg);
}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(42,74,102,.45);
  pointer-events:none;
}
.scroll-progress-bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--coral) 100%);
  will-change:transform;
}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,120px);
  overflow:hidden;
  color:var(--mist);
  font-size:14px;
  background:linear-gradient(180deg,#04101B 0%,#030B13 68%,#020810 100%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:linear-gradient(90deg,rgba(42,74,102,.30) 1px,transparent 1px);
  background-size:80px 100%;
  opacity:.45;
}
.site-footer::after{
  content:"";
  position:absolute;
  top:-120px;
  right:-80px;
  width:420px;
  height:420px;
  pointer-events:none;
  background:radial-gradient(circle,rgba(25,224,210,.14),transparent 68%);
}

.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);
  gap:clamp(32px,5vw,72px);
  padding-block:clamp(44px,6vw,80px) clamp(28px,4vw,48px);
}
.footer-col{min-width:0;}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:14px;
  color:var(--snow);
  text-decoration:none;
}
.footer-brand-text{display:flex;flex-direction:column;gap:4px;}
.footer-brand-title{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--snow);
}
.footer-brand-sub{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-note{
  margin:18px 0 0;
  max-width:38ch;
  line-height:1.7;
  color:var(--mist);
}
.footer-contact{
  display:grid;
  gap:10px;
  margin:22px 0 0;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.03em;
}
.footer-contact li{
  display:grid;
  grid-template-columns:82px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
}
.footer-contact-label{color:rgba(159,182,201,.68);}
.footer-contact-value{color:var(--snow);word-break:break-word;}
.footer-icp{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:22px 0 0;
  padding:7px 12px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--gold);
  background:rgba(245,194,107,.07);
  border:1px solid rgba(245,194,107,.4);
  border-radius:var(--radius);
}

.footer-heading{
  display:flex;
  align-items:center;
  gap:12px;
  margin:0 0 18px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-heading::after{
  content:"";
  flex:1 1 auto;
  height:1px;
  background:var(--line);
}
.footer-dir-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px;
}
.footer-dir-link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:12px 14px;
  font-size:14px;
  font-weight:600;
  color:var(--snow);
  text-decoration:none;
  background:rgba(11,30,51,.75);
  border:1px solid var(--line);
  border-left:2px solid rgba(25,224,210,.4);
  border-radius:var(--radius);
  transition:border-color .2s ease,background-color .2s ease,transform .2s ease,color .2s ease;
}
.footer-dir-link:hover{
  color:var(--cyan);
  background:rgba(16,42,68,.95);
  border-left-color:var(--coral);
  transform:translateX(2px);
}
.footer-dir-num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--cyan);
}
.footer-cta{margin-top:18px;}

.footer-base{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-block:20px 28px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:rgba(159,182,201,.8);
}
.footer-copy{margin:0;}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-legal a{
  color:var(--snow);
  text-decoration:none;
  padding-bottom:2px;
  border-bottom:1px solid rgba(42,74,102,.95);
  transition:color .2s ease,border-color .2s ease;
}
.footer-legal a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}

/* ---------- 10. 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  z-index:90;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:48px;
  height:48px;
  padding:0;
  color:var(--ink);
  background:var(--cyan);
  border:2px solid var(--ink);
  border-radius:var(--radius);
  box-shadow:3px 3px 0 rgba(0,0,0,.6);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,background-color .2s ease;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;transform:none;}
.to-top:hover{background:var(--coral);}
.to-top-icon{font-size:18px;line-height:1;font-weight:800;}

/* ---------- 11. 焦点与降噪 ---------- */
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}
a:focus-visible,
button:focus-visible,
.btn:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:var(--radius);
}
#main-content:focus{outline:none;}

@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;
  }
  .status-dot{animation:none;}
}

/* ---------- 12. 响应式 ---------- */
@media (max-width:1100px){
  .nav-link{padding:9px 9px;font-size:13px;}
}
@media (max-width:960px){
  html{scroll-padding-top:112px;}
  .nav-toggle{display:inline-flex;}
  .header-actions .btn--primary{display:none;}
  .header-actions{margin-left:auto;}
  .nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:4px;
    margin:0;
    padding:14px var(--pad-x) 22px;
    background:#081725;
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:0 30px 52px -30px #000;
    max-height:calc(100vh - 110px);
    overflow-y:auto;
  }
  .site-header[data-open="true"]{background:rgba(6,18,31,.98);}
  .site-header[data-open="true"] .nav{display:flex;}
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .nav-list > li{width:100%;}
  .nav-link{
    display:block;
    padding:13px 12px;
    font-size:15px;
    border:1px solid transparent;
    border-bottom:1px solid rgba(42,74,102,.55);
    border-radius:0;
  }
  .nav-link:hover{background:rgba(16,42,68,.9);border-color:transparent;border-bottom-color:var(--cyan);}
  .nav-link[aria-current="page"]{box-shadow:inset 3px 0 0 var(--cyan);border-bottom-color:rgba(42,74,102,.55);}
  .nav-cta{display:inline-flex;width:100%;margin-top:16px;}
  .header-inner{padding-block:12px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:900px){
  .span-4,.span-6,.span-8{grid-column:span 12;}
}
@media (max-width:720px){
  body{background-attachment:scroll;}
  .status-item--muted{display:none;}
  .status-strip-inner{gap:8px;font-size:10.5px;}
  .brand-title{font-size:15.5px;}
  .brand-mark{width:40px;height:40px;font-size:12.5px;}
  .prose{font-size:16px;}
  .footer-dir-grid{grid-template-columns:minmax(0,1fr);}
  .footer-base{justify-content:flex-start;}
}
@media (max-width:480px){
  .status-strip{font-size:10px;}
  .brand-sub{font-size:9.5px;letter-spacing:.1em;}
  .to-top{right:14px;bottom:14px;width:44px;height:44px;}
}