/* =========================================================
   金都中心 · 共享站点样式 /assets/site.css
   0 变量与重置  1 排版  2 布局  3 通用组件
   4 头部  5 页脚  6 响应式  7 无动画偏好
   ========================================================= */

/* ---------- 0 变量与重置 ---------- */
:root{
  --blue-900:#0B2A6F;
  --blue-700:#1246C4;
  --blue-600:#1A5CFF;
  --blue-100:#DCE6FF;
  --blue-50:#F3F6FF;
  --orange-600:#C2410C;
  --orange-500:#FF6B35;
  --orange-100:#FFE3D8;
  --ink-900:#101828;
  --ink-600:#475467;
  --line-200:#E4E7EC;
  --paper:#FFFFFF;
  --canvas:#FAFBFF;

  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --r-xs:8px;
  --r-sm:12px;
  --r-md:18px;
  --r-lg:26px;
  --pill:999px;

  --shadow-soft:0 18px 44px -26px rgba(11,42,111,.42);
  --shadow-capsule:0 16px 38px -24px rgba(11,42,111,.55);
  --w-max:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--canvas);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;line-height:1.28;color:var(--ink-900);letter-spacing:-.01em}
p{margin:0}
p + p{margin-top:1em}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--blue-700);text-decoration:none}
a:hover{color:var(--blue-600)}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit}
address{font-style:normal}
table{border-collapse:collapse}
:focus-visible{outline:3px solid var(--orange-500);outline-offset:3px}
::selection{background:var(--blue-100);color:var(--blue-900)}

/* ---------- 1 排版 ---------- */
.mono-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.5;
  letter-spacing:.08em;
  padding:2px 9px;
  border-radius:var(--pill);
  background:var(--blue-100);
  color:var(--blue-900);
  font-weight:500;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--blue-600);
  font-weight:500;
}
.eyebrow::before{content:"";width:24px;height:1px;background:currentColor;display:block}
.section-title{font-size:clamp(22px,3vw,28px);line-height:1.3}
.section-lead{font-size:16px;color:var(--ink-600);max-width:66ch;line-height:1.75}

/* ---------- 2 布局 ---------- */
.container{width:100%;max-width:var(--w-max);margin-inline:auto;padding-inline:24px}
.container--narrow{max-width:880px}
.section{padding:72px 0}
.section--tint{background:var(--blue-50)}
.section--paper{background:var(--paper)}
.section-head{display:grid;gap:12px;max-width:720px;margin-bottom:36px}
.stack{display:flex;flex-direction:column;gap:16px}
.split-layout{
  display:grid;
  grid-template-columns:minmax(0,38fr) minmax(0,62fr);
  gap:56px;
  align-items:start;
}
.frame-stage{
  position:relative;
  border:1px solid rgba(26,92,255,.2);
  border-radius:32px;
  padding:clamp(24px,4vw,56px);
  background:linear-gradient(160deg,var(--paper) 0%,var(--blue-50) 100%);
  overflow:hidden;
}
.frame-stage::before{
  content:"";
  position:absolute;
  inset:14px;
  border:1px dashed rgba(26,92,255,.16);
  border-radius:24px;
  pointer-events:none;
}
.rule-scale{
  height:8px;
  background-image:repeating-linear-gradient(90deg,rgba(26,92,255,.28) 0 1px,transparent 1px 12px);
  background-size:auto 100%;
  border-radius:var(--pill);
}

/* ---------- 3 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:inherit;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transition:transform .18s var(--ease),background .2s ease,color .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn--primary{background:var(--blue-600);color:#fff;box-shadow:0 12px 26px -16px rgba(26,92,255,.95)}
.btn--primary:hover{background:var(--blue-700);color:#fff;transform:translateY(-1px)}
.btn--accent{background:var(--orange-500);color:#2B1005;box-shadow:0 12px 26px -18px rgba(255,107,53,.9)}
.btn--accent:hover{background:#FF814F;color:#2B1005;transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--blue-700);border-color:rgba(26,92,255,.34)}
.btn--ghost:hover{background:var(--blue-50);color:var(--blue-900)}
.btn--quiet{background:var(--blue-100);color:var(--blue-900)}
.btn--quiet:hover{background:#CBDAFF;color:var(--blue-900)}
.btn--sm{padding:9px 17px;font-size:13.5px}
.btn--block{width:100%}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:var(--pill);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.04em;
  font-weight:500;
  line-height:1.6;
}
.tag--blue{background:var(--blue-100);color:var(--blue-900)}
.tag--orange{background:var(--orange-100);color:var(--orange-600)}
.tag--ghost{background:transparent;border:1px solid var(--line-200);color:var(--ink-600)}

.surface{
  background:var(--paper);
  border:1px solid var(--line-200);
  border-radius:var(--r-md);
  padding:24px;
}

.media-frame{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  aspect-ratio:16/10;
  background:linear-gradient(140deg,var(--blue-50),var(--blue-100));
  border:1px solid rgba(26,92,255,.12);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}

.breadcrumb{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--ink-600)}
.breadcrumb-list{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.breadcrumb-list li{display:flex;align-items:center;gap:10px}
.breadcrumb-list li + li::before{content:"/";color:#C3CCE0}
.breadcrumb-link{color:var(--ink-600)}
.breadcrumb-link:hover{color:var(--blue-700)}
.breadcrumb-current{color:var(--blue-900)}

.path-list{position:relative;display:grid;gap:0}
.path-step{
  position:relative;
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:20px;
  padding:0 0 30px;
}
.path-step::before{
  content:"";
  position:absolute;
  left:27px;
  top:56px;
  bottom:0;
  width:2px;
  background:linear-gradient(180deg,rgba(26,92,255,.32),rgba(26,92,255,.06));
}
.path-step:last-child{padding-bottom:0}
.path-step:last-child::before{display:none}
.path-index{
  width:56px;
  height:56px;
  border-radius:18px;
  display:grid;
  place-items:center;
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:600;
  color:var(--blue-900);
  background:var(--blue-100);
  border:1px solid rgba(26,92,255,.16);
}
.path-step[data-current] .path-index{background:var(--orange-500);border-color:var(--orange-500);color:#2B1005}
.path-title{font-size:17px;font-weight:700;margin:0 0 6px;line-height:1.4}
.path-text{font-size:15px;color:var(--ink-600);margin:0}

.accordion{border-top:1px solid var(--line-200)}
.accordion-item{border-bottom:1px solid var(--line-200)}
.accordion-trigger{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 4px;
  background:none;
  border:0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  line-height:1.5;
  color:var(--ink-900);
  cursor:pointer;
}
.accordion-trigger::after{
  content:"+";
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:20px;
  line-height:1;
  color:var(--blue-600);
}
.accordion-trigger[aria-expanded="true"]::after{content:"–";color:var(--orange-600)}
.accordion-trigger:hover{color:var(--blue-700)}
.accordion-panel{padding:0 4px 22px;font-size:15.5px;color:var(--ink-600);line-height:1.8}

.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line-200);
  border-radius:var(--r-md);
  background:var(--paper);
}
.data-table{width:100%;font-size:14.5px}
.data-table th,.data-table td{
  padding:14px 16px;
  text-align:left;
  line-height:1.6;
  border-bottom:1px solid var(--line-200);
}
.data-table th{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  font-weight:500;
  color:var(--ink-600);
  background:var(--blue-50);
  white-space:nowrap;
}
.data-table tbody tr:last-child td{border-bottom:0}
.data-table tbody tr:hover{background:var(--blue-50)}

/* 滚动显现协议 */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .62s var(--ease),transform .62s var(--ease);
}
html.js [data-reveal].is-revealed{opacity:1;transform:none}
html.js [data-reveal-delay="1"]{transition-delay:.07s}
html.js [data-reveal-delay="2"]{transition-delay:.14s}
html.js [data-reveal-delay="3"]{transition-delay:.21s}
html.js [data-reveal-delay="4"]{transition-delay:.28s}
html.js [data-reveal-delay="5"]{transition-delay:.35s}
html.js [data-reveal-delay="6"]{transition-delay:.42s}

/* ---------- 4 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:14px 0 0;
  pointer-events:none;
}
.skip-link{
  position:fixed;
  left:50%;
  top:10px;
  z-index:200;
  transform:translate(-50%,-180%);
  padding:11px 22px;
  border-radius:var(--pill);
  background:var(--blue-900);
  color:#fff;
  font-size:14px;
  font-weight:600;
  box-shadow:var(--shadow-soft);
  transition:transform .24s var(--ease);
  pointer-events:auto;
}
.skip-link:focus,
.skip-link:focus-visible{transform:translate(-50%,0);color:#fff}

.header-rail{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding-inline:24px;
  display:flex;
  flex-direction:column;
  gap:10px;
  pointer-events:none;
}
.header-capsule{
  position:relative;
  pointer-events:auto;
  display:flex;
  align-items:center;
  gap:16px;
  padding:10px 12px 10px 14px;
  background:rgba(255,255,255,.86);
  border:1px solid rgba(26,92,255,.14);
  border-radius:var(--pill);
  box-shadow:var(--shadow-capsule);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  backdrop-filter:blur(14px) saturate(1.4);
  transition:box-shadow .3s ease,background .3s ease,transform .3s var(--ease);
}
.site-header[data-scrolled] .header-capsule{
  background:rgba(255,255,255,.95);
  box-shadow:0 20px 40px -26px rgba(11,42,111,.62);
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:var(--ink-900);
  text-decoration:none;
}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:38px;
  height:38px;
  flex:0 0 auto;
  display:grid;
  place-items:center;
  border-radius:13px;
  background:linear-gradient(150deg,var(--blue-600),var(--blue-900));
  color:#fff;
  font-size:16px;
  font-weight:700;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.26);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;gap:1px}
.brand-name{font-size:16px;font-weight:700;letter-spacing:.02em}
.brand-line{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.16em;
  color:var(--ink-600);
  text-transform:uppercase;
}

.primary-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-block;
  padding:8px 13px;
  border-radius:var(--pill);
  font-size:14.5px;
  font-weight:500;
  color:var(--ink-600);
  white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--blue-700);background:var(--blue-50)}
.nav-link[aria-current="page"]{
  color:var(--blue-700);
  background:var(--blue-100);
  font-weight:600;
}

.header-actions{display:flex;align-items:center;gap:8px;margin-left:6px;flex:0 0 auto}
.header-cta{flex:0 0 auto}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border-radius:var(--pill);
  background:var(--blue-50);
  border:1px solid rgba(26,92,255,.18);
  color:var(--blue-900);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  transition:background .2s ease;
}
.nav-toggle:hover{background:var(--blue-100)}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:background .2s ease;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .26s var(--ease),top .26s var(--ease);
}
.nav-toggle-bars::before{top:-5px}
.nav-toggle-bars::after{top:5px}
.site-header[data-open] .nav-toggle-bars{background:transparent}
.site-header[data-open] .nav-toggle-bars::before{top:0;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle-bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle-label{line-height:1}

.signal-strip{
  pointer-events:auto;
  display:flex;
  align-items:center;
  gap:10px;
  padding:7px 16px;
  border-radius:var(--pill);
  background:rgba(220,230,255,.62);
  border:1px solid rgba(26,92,255,.1);
  font-size:12.5px;
  color:var(--blue-900);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.signal-dot{
  width:7px;
  height:7px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--orange-500);
  box-shadow:0 0 0 4px rgba(255,107,53,.18);
  animation:signal-pulse 2.8s ease-in-out infinite;
}
@keyframes signal-pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(255,107,53,.18)}
  50%{box-shadow:0 0 0 8px rgba(255,107,53,.05)}
}
.signal-text{
  min-width:0;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  line-height:1.6;
}
.signal-text .mono-tag{margin-right:2px;background:rgba(26,92,255,.14);color:var(--blue-900)}
.signal-link{
  margin-left:auto;
  flex:0 0 auto;
  font-size:12.5px;
  font-weight:600;
  color:var(--orange-600);
  white-space:nowrap;
  border-bottom:1px solid rgba(194,65,12,.35);
  padding-bottom:1px;
}
.signal-link:hover{color:var(--orange-600);border-bottom-color:var(--orange-600)}

.scroll-meter{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:120;
  pointer-events:none;
  background:transparent;
}
.scroll-meter-fill{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--blue-600),var(--orange-500));
  transition:width .12s linear;
}

/* ---------- 5 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:96px;
  background:linear-gradient(168deg,var(--blue-900) 0%,#08204F 58%,#061537 100%);
  color:#DCE6FF;
}
.footer-blob{
  position:absolute;
  top:-190px;
  right:-150px;
  width:520px;
  height:520px;
  border-radius:50%;
  background:radial-gradient(circle at 34% 34%,rgba(255,107,53,.42),rgba(255,107,53,0) 68%);
  pointer-events:none;
}
.footer-inner{
  position:relative;
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:72px 24px 0;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr) minmax(0,1.15fr);
  gap:48px;
}
.footer-brand-link{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:#fff;
  text-decoration:none;
}
.footer-brand-link:hover{color:#fff}
.footer-mark{
  width:40px;
  height:40px;
  display:grid;
  place-items:center;
  border-radius:14px;
  background:linear-gradient(150deg,#3D7BFF,#1246C4);
  color:#fff;
  font-size:16px;
  font-weight:700;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28);
}
.footer-name{font-size:20px;font-weight:700;letter-spacing:.02em}
.footer-desc{
  margin:18px 0 22px;
  max-width:34ch;
  font-size:14.5px;
  line-height:1.8;
  color:#C7D6F7;
}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  padding:5px 11px;
  border-radius:var(--pill);
  background:rgba(220,230,255,.1);
  border:1px solid rgba(220,230,255,.2);
  color:#DCE6FF;
}
.footer-title{
  margin:0 0 18px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:#93AEE8;
}
.footer-links{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:11px 22px;
}
.footer-link{
  font-size:14.5px;
  color:#DCE6FF;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .2s ease,border-color .2s ease;
}
.footer-link:hover{color:#FFC3AC;border-bottom-color:rgba(255,195,172,.6)}
.footer-contact-list{display:grid;gap:18px}
.footer-contact-item{display:grid;gap:6px}
.footer-contact-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:#93AEE8;
}
.copy-btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  max-width:100%;
  padding:8px 12px;
  border-radius:var(--r-sm);
  background:rgba(220,230,255,.08);
  border:1px solid rgba(220,230,255,.18);
  color:#fff;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background .2s ease,border-color .2s ease;
}
.copy-btn:hover{background:rgba(220,230,255,.16);border-color:rgba(220,230,255,.34)}
.copy-btn.is-copied{background:rgba(255,107,53,.22);border-color:var(--orange-500)}
.copy-btn-value{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.copy-btn-hint{
  flex:0 0 auto;
  font-family:var(--font-sans);
  font-size:11px;
  letter-spacing:0;
  color:#A9BEEA;
  padding-left:10px;
  border-left:1px solid rgba(220,230,255,.26);
}
.copy-btn.is-copied .copy-btn-hint{color:#FFC3AC}
.footer-address{font-size:14px;line-height:1.75;color:#C7D6F7;max-width:30ch}
.footer-note{margin-top:18px;font-size:12.5px;line-height:1.7;color:#93AEE8}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  margin-top:52px;
  padding:22px 0 34px;
  border-top:1px solid rgba(220,230,255,.14);
}
.footer-meta{margin:0;font-size:12.5px;color:#A9BEEA}
.footer-meta--icp{font-family:var(--font-mono);letter-spacing:.06em}
.footer-year{font-family:var(--font-mono);color:#DCE6FF}

/* ---------- 6 响应式 ---------- */
@media (max-width:1080px){
  .header-rail{padding-inline:16px;gap:8px}
  .header-capsule{gap:10px;padding:9px 10px 9px 12px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    margin:0;
    padding:10px;
    background:#fff;
    border:1px solid var(--line-200);
    border-radius:22px;
    box-shadow:var(--shadow-soft);
    opacity:0;
    visibility:hidden;
    transform:translateY(-8px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s linear;
    max-height:min(70vh,520px);
    overflow-y:auto;
    pointer-events:none;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:12px 14px;border-radius:14px;font-size:15px}
  .site-header[data-open] .primary-nav{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
  }
  .site-header[data-open] .header-capsule{background:#fff}
  .signal-strip{font-size:12px;padding:6px 13px}
  .footer-top{grid-template-columns:1fr 1fr;gap:40px}
  .footer-brand{grid-column:1 / -1}
  .footer-desc{max-width:52ch}
}
@media (max-width:820px){
  .section{padding:56px 0}
  .container{padding-inline:20px}
  .split-layout{grid-template-columns:1fr;gap:32px}
  .footer-inner{padding:56px 20px 0}
  .footer-top{grid-template-columns:1fr;gap:36px}
  .footer-bottom{margin-top:40px;flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .header-rail{padding-inline:12px}
  .brand-line{display:none}
  .brand-mark{width:34px;height:34px;border-radius:11px}
  .header-cta{display:none}
  .signal-text{font-size:11.5px}
  .signal-link{font-size:11.5px}
  .footer-links{grid-template-columns:1fr 1fr;gap:10px 16px}
  .btn{padding:12px 20px;font-size:14.5px}
  .path-step{grid-template-columns:46px minmax(0,1fr);gap:16px}
  .path-index{width:46px;height:46px;border-radius:15px;font-size:13px}
  .path-step::before{left:22px;top:48px}
}

/* ---------- 7 无动画偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0s !important;
  }
  html.js [data-reveal]{opacity:1 !important;transform:none !important}
  .signal-dot{animation:none}
  .scroll-meter-fill{transition:none}
}