/* ============================================================
   九博国际中心 · 共享样式 /assets/site.css
   技术蓝图网格 + 规则年鉴色板
   ============================================================ */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dt,dd,table,th,td{margin:0;padding:0;}
ul,ol{list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
img,svg,video{display:block;max-width:100%;}
table{border-collapse:collapse;width:100%;}
summary{cursor:pointer;}

/* ---------- tokens ---------- */
:root{
  --ink-900:#0B1B2B;
  --ink-700:#12263A;
  --ink-500:#1C3A57;
  --amber-500:#E8A33D;
  --amber-300:#F2C879;
  --celadon-500:#5FA894;
  --celadon-200:#A9D9C8;
  --vermilion:#E4572E;
  --paper:#F5F1E8;
  --mist:#C7D3DE;

  --line:rgba(199,211,222,.18);
  --line-soft:rgba(199,211,222,.10);
  --line-strong:rgba(199,211,222,.32);

  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"SFMono-Regular","JetBrains Mono","Cascadia Mono",Consolas,"Liberation Mono",monospace;

  --shell:1360px;
  --wrap:1240px;
  --read:40em;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- base ---------- */
body{
  position:relative;
  min-height:100vh;
  background-color:var(--ink-900);
  color:var(--paper);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
/* 蓝图坐标底纹（固定层，不干扰阅读） */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(to right,rgba(199,211,222,.055) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(to bottom,rgba(199,211,222,.045) 0 1px,transparent 1px 96px);
}
#main-content{position:relative;z-index:1;display:block;scroll-margin-top:120px;}

h1,h2,h3,h4{line-height:1.2;font-weight:800;letter-spacing:-.01em;}
p{max-width:var(--read);}
p + p{margin-top:.85em;}

:focus-visible{outline:2px solid var(--amber-500);outline-offset:3px;border-radius:2px;}
::selection{background:var(--amber-500);color:var(--ink-900);}

/* ---------- 无障碍工具类 ---------- */
.sr-only,.nav-toggle__label{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  padding:10px 18px;border-radius:3px;
  background-color:var(--amber-500);color:var(--ink-900);
  font-size:14px;font-weight:700;letter-spacing:.06em;
  transition:top .16s var(--ease);
}
.skip-link:focus{top:12px;}

/* ---------- 布局容器 ---------- */
.wrap{width:min(100% - 2rem,var(--wrap));margin-inline:auto;}
.section{padding:clamp(40px,6vw,78px) 0;}
.section + .section{border-top:1px solid var(--line-soft);}
.section__head{margin-bottom:clamp(22px,3vw,38px);}
.section__index{
  display:block;font-family:var(--mono);font-size:12px;
  letter-spacing:.22em;color:var(--amber-500);margin-bottom:10px;
}
.section__title{font-size:clamp(24px,3.2vw,38px);font-weight:800;}
.section__note{margin-top:10px;font-size:15px;color:var(--mist);}

.eyebrow{
  display:block;font-family:var(--mono);font-size:11px;
  letter-spacing:.24em;color:var(--amber-300);text-transform:uppercase;
}
.display-1{font-size:clamp(38px,7vw,76px);font-weight:800;line-height:1.04;letter-spacing:-.025em;}
.display-2{font-size:clamp(26px,3.6vw,42px);font-weight:800;line-height:1.12;letter-spacing:-.015em;}
.lede{font-size:18px;line-height:1.85;color:var(--mist);max-width:var(--read);}
.num{font-family:var(--mono);font-weight:600;letter-spacing:.02em;font-variant-numeric:tabular-nums;}

/* ---------- 左信息轴 ---------- */
.axis{display:flex;flex-direction:column;gap:14px;padding-left:16px;border-left:1px solid var(--line);}
.axis__num{font-family:var(--mono);font-size:13px;letter-spacing:.12em;color:var(--amber-500);}
.axis__label{font-size:12px;letter-spacing:.16em;color:var(--mist);opacity:.85;}

/* ---------- 栅格 ---------- */
.grid{display:grid;gap:clamp(18px,2.4vw,30px);}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr));}

/* ---------- 面包屑 ---------- */
.crumbs{margin:0 0 clamp(20px,2.6vw,34px);}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--mist);}
.crumbs__item{display:inline-flex;align-items:center;gap:8px;}
.crumbs__link{color:var(--mist);transition:color .16s var(--ease),border-color .16s var(--ease);border-bottom:1px solid transparent;}
.crumbs__link:hover{color:var(--paper);border-bottom-color:var(--amber-500);}
.crumbs__sep{color:var(--line-strong);font-family:var(--mono);font-size:11px;}
.crumbs__item[aria-current="page"]{color:var(--paper);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border:1px solid transparent;border-radius:3px;
  font-size:14px;font-weight:600;letter-spacing:.06em;
  transition:background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease);
}
.btn--amber{background-color:var(--amber-500);color:var(--ink-900);font-weight:700;}
.btn--amber:hover{background-color:var(--amber-300);}
.btn--outline{border-color:var(--line);color:var(--paper);}
.btn--outline:hover{border-color:var(--celadon-500);color:var(--celadon-200);background-color:rgba(95,168,148,.10);}

/* ---------- 数据模块 ---------- */
.panel{
  position:relative;
  background-color:var(--ink-700);
  border:1px solid var(--line-soft);
  border-radius:4px;
  padding:clamp(18px,2.2vw,26px);
  transition:background-color .18s var(--ease),border-color .18s var(--ease);
}
.panel:hover{background-color:var(--ink-500);border-color:var(--line);}
.panel__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  padding-bottom:12px;margin-bottom:14px;border-bottom:1px solid var(--line-soft);
}
.panel__title{font-size:17px;font-weight:800;letter-spacing:.02em;}

.stat{display:flex;flex-direction:column;gap:4px;}
.stat__value{font-family:var(--mono);font-size:clamp(22px,3vw,32px);font-weight:700;color:var(--amber-300);font-variant-numeric:tabular-nums;}
.stat__label{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--mist);text-transform:uppercase;}

.data-table{font-size:15px;}
.data-table th{
  text-align:left;font-family:var(--mono);font-weight:500;font-size:11px;
  letter-spacing:.18em;text-transform:uppercase;color:var(--mist);
  padding:10px 14px;border-bottom:1px solid var(--line);
}
.data-table td{padding:12px 14px;border-bottom:1px solid var(--line-soft);vertical-align:top;}
.data-table tbody tr:nth-child(odd){background-color:rgba(28,58,87,.42);}
.data-table tbody tr:hover{background-color:rgba(28,58,87,.72);}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:999px;border:1px solid var(--line);
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--mist);
}
.tag--amber{border-color:rgba(232,163,61,.5);color:var(--amber-300);}
.tag--celadon{border-color:rgba(95,168,148,.55);color:var(--celadon-200);background-color:rgba(95,168,148,.10);}

/* ---------- 图片 / 图形容器 ---------- */
.media-frame{
  position:relative;
  background-color:var(--ink-700);
  border:1px solid var(--line-soft);
  border-radius:4px;
  overflow:hidden;
}
.media-frame__inner{
  position:relative;
  aspect-ratio:16 / 9;
  background-color:var(--ink-700);
  background-image:radial-gradient(circle at 1px 1px,rgba(169,217,200,.16) 1px,transparent 0);
  background-size:8px 8px;
}
.media-frame__inner img,.media-frame__inner svg{width:100%;height:100%;object-fit:cover;}
.media-frame__note{
  display:block;padding:10px 14px;border-top:1px solid var(--line-soft);
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--mist);
}

/* ---------- 刻度分隔线 ---------- */
.rule-h{
  height:9px;border:0;
  background-image:
    repeating-linear-gradient(to right,rgba(199,211,222,.42) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(to right,rgba(199,211,222,.18) 0 1px,transparent 1px 24px);
  background-repeat:repeat-x;
  background-size:100% 9px,100% 5px;
  background-position:top left,top left;
  margin:clamp(28px,4vw,52px) 0;
}

/* ---------- 显现 ---------- */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
[data-reveal].is-in{opacity:1;transform:none;}

/* ============================================================
   页头
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:60;
  background-color:var(--ink-900);
  border-bottom:1px solid var(--line);
  color:var(--paper);
}
.site-header__inner{
  display:flex;align-items:center;justify-content:space-between;gap:22px;
  width:min(100% - 2rem,var(--shell));
  margin-inline:auto;
  padding:14px 0 10px;
}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand__mark{
  position:relative;width:26px;height:26px;flex:0 0 auto;
  border:1px solid var(--amber-500);border-radius:3px;
  transition:border-color .16s var(--ease),background-color .16s var(--ease);
}
.brand__mark::before,.brand__mark::after{content:"";position:absolute;height:1px;background-color:var(--celadon-500);}
.brand__mark::before{left:5px;right:5px;top:8px;}
.brand__mark::after{left:5px;width:9px;bottom:8px;}
.brand:hover .brand__mark{background-color:rgba(232,163,61,.12);border-color:var(--amber-300);}
.brand__text{display:flex;flex-direction:column;line-height:1.25;}
.brand__name{font-size:19px;font-weight:800;letter-spacing:.06em;color:var(--paper);}
.brand__meta{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--mist);opacity:.75;}

.site-nav{display:block;}
.site-nav__list{display:flex;align-items:center;gap:clamp(14px,2vw,28px);}
.site-nav__item{position:relative;}
.site-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:6px;
  padding:8px 2px 9px;font-size:15px;letter-spacing:.04em;color:var(--mist);
  transition:color .16s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background-color:var(--amber-500);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--paper);}
.site-nav__link:hover::after,.site-nav__link:focus-visible::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{color:var(--paper);font-weight:700;}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background-color:var(--celadon-500);}
.site-nav__num{font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--amber-500);opacity:.7;}
.site-nav__link[aria-current="page"] .site-nav__num{opacity:1;color:var(--celadon-200);}

.nav-toggle{display:none;}

.site-header__rule{
  display:flex;align-items:center;gap:14px;
  width:min(100% - 2rem,var(--shell));
  margin-inline:auto;padding-bottom:10px;
}
.rule__track{
  position:relative;flex:1 1 auto;height:2px;
  background-color:rgba(199,211,222,.14);
  background-image:repeating-linear-gradient(to right,rgba(199,211,222,.30) 0 1px,transparent 1px 32px);
}
.rule__fill{
  display:block;width:100%;height:100%;
  background-image:linear-gradient(90deg,var(--amber-500),var(--celadon-500));
  transform:scaleX(0);transform-origin:left center;
}
.rule__index{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--mist);white-space:nowrap;
}
.rule__unit{color:var(--amber-300);}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;z-index:2;
  margin-top:clamp(48px,7vw,96px);
  background-color:var(--ink-700);
  border-top:1px solid var(--line);
  color:var(--mist);
}
.site-footer__inner{width:min(100% - 2rem,var(--shell));margin-inline:auto;padding:clamp(34px,4.5vw,56px) 0 0;}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.35fr 1fr;
  gap:clamp(22px,3vw,40px);
}
.footer-col{min-width:0;}
.footer-brand{font-size:22px;font-weight:800;letter-spacing:.06em;color:var(--paper);}
.footer-lead{margin-top:10px;font-size:14px;line-height:1.75;max-width:24em;color:var(--mist);}
.footer-col--brand .btn{margin-top:18px;}
.footer-heading{
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;
  color:var(--amber-300);margin-bottom:14px;
  padding-bottom:8px;border-bottom:1px solid var(--line-soft);
}
.footer-list{display:flex;flex-direction:column;gap:9px;font-size:14px;}
.footer-link{
  display:inline-block;color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--paper);border-bottom-color:var(--amber-500);}
.footer-contact__row{display:flex;flex-direction:column;gap:2px;}
.footer-contact__key{font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:rgba(199,211,222,.6);text-transform:uppercase;}
.footer-contact__val{font-size:14px;color:var(--paper);word-break:break-word;}
.footer-note{margin-top:14px;font-size:13px;line-height:1.7;color:rgba(199,211,222,.7);max-width:26em;}

.footer-scale{
  height:14px;margin-top:clamp(28px,4vw,46px);
  background-image:
    repeating-linear-gradient(to right,rgba(199,211,222,.45) 0 1px,transparent 1px 120px),
    repeating-linear-gradient(to right,rgba(199,211,222,.20) 0 1px,transparent 1px 24px);
  background-repeat:repeat-x,repeat-x;
  background-size:100% 14px,100% 7px;
  background-position:top left,top left;
}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;
  padding:16px 0 24px;
  font-family:var(--mono);font-size:12px;letter-spacing:.06em;
  color:rgba(199,211,222,.72);
}
.footer-legal .footer-link{font-family:var(--mono);font-size:12px;color:rgba(199,211,222,.72);}
.footer-legal__sep{color:var(--line-strong);}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1.2fr;}
  .footer-col--brand{grid-column:1 / -1;}
}
@media (max-width:900px){
  body{font-size:16px;}
  .site-header__inner{padding:12px 0 10px;gap:14px;}
  .site-header__rule{padding-bottom:8px;}

  .nav-toggle{
    display:inline-flex;flex-direction:column;justify-content:center;gap:4px;
    width:46px;height:38px;padding:0 10px;flex:0 0 auto;
    border:1px solid var(--line-strong);border-radius:3px;
    transition:border-color .16s var(--ease),background-color .16s var(--ease);
  }
  .nav-toggle:hover{border-color:var(--amber-500);background-color:rgba(232,163,61,.10);}
  .nav-toggle__bar{display:block;height:1.5px;background-color:var(--mist);transition:transform .18s var(--ease),opacity .18s var(--ease),background-color .18s var(--ease);}
  .nav-toggle__bar:nth-child(2){width:70%;}
  .site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(5.5px) rotate(45deg);background-color:var(--amber-500);}
  .site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0;}
  .site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-5.5px) rotate(-45deg);background-color:var(--amber-500);}

  .site-nav{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    background-color:var(--ink-700);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
  }
  .site-header[data-open] .site-nav{display:block;}
  .site-nav__list{
    flex-direction:column;align-items:stretch;gap:0;
    width:min(100% - 2rem,var(--shell));
    margin-inline:auto;padding:6px 0 12px;
  }
  .site-nav__item{border-bottom:1px dashed rgba(199,211,222,.14);}
  .site-nav__item:last-child{border-bottom:0;}
  .site-nav__link{display:flex;width:100%;padding:14px 2px;font-size:16px;gap:10px;}
  .site-nav__link::after{height:2px;}

  .grid--split,.grid--halves{grid-template-columns:minmax(0,1fr);}
}
@media (max-width:680px){
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-col--brand{grid-column:auto;}
  .footer-legal{font-size:11px;letter-spacing:.04em;}
  .display-1{font-size:clamp(32px,10vw,52px);}
  .data-table{font-size:14px;}
  .data-table th,.data-table td{padding:10px 10px;}
}

/* ============================================================
   动效降级
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important;}
  [data-reveal]{opacity:1;transform:none;}
  .rule__fill{transition:none;}
}