/* ============================================================
   旭博综合中心 · 共享样式 /assets/site.css
   坐标轨道 + 深海夜蓝 + 暖纸白 + 熔岩橙 + 荧光青
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --ink-900:#071A2B;
  --ink-800:#0E2A44;
  --ink-700:#123657;
  --paper:#F4EFE6;
  --paper-2:#FFFDF8;
  --lava:#FF6A2B;
  --lava-ink:#C2410C;
  --cyan:#2BE3C6;
  --amber:#FFB84D;
  --steel:#6C8BA3;
  --graphite:#1B1E24;
  --white:#FFFFFF;
  --alert:#E5484D;

  --line-dark:rgba(108,139,163,.30);
  --line-dark-soft:rgba(108,139,163,.16);
  --line-light:rgba(27,30,36,.16);
  --grid-dark:rgba(43,227,198,.09);
  --grid-light:rgba(27,30,36,.07);

  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,"SFMono-Regular",monospace;

  --rail-w:120px;
  --header-h:64px;
  --maxw:1320px;
  --gap:clamp(18px,2.6vw,32px);
  --radius:4px;
  --shadow-1:0 1px 0 rgba(255,255,255,.03), 0 14px 26px -22px rgba(0,0,0,.95);
  --shadow-2:0 2px 0 rgba(255,255,255,.04), 0 22px 40px -24px rgba(0,0,0,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:15px;
  line-height:1.9;
  font-weight:400;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:2px}
::selection{background:var(--lava);color:#160A03}
#main-content{scroll-margin-top:calc(var(--header-h) + 12px)}

/* ---------- 3. 排版 ---------- */
.h1{font-family:var(--font-head);font-size:clamp(30px,5.6vw,56px);font-weight:800;line-height:1.16;letter-spacing:-.01em}
.h2{font-family:var(--font-head);font-size:clamp(24px,3.6vw,40px);font-weight:800;line-height:1.24;letter-spacing:-.005em}
.h3{font-family:var(--font-head);font-size:clamp(19px,2.4vw,28px);font-weight:700;line-height:1.36}
.h4{font-family:var(--font-head);font-size:clamp(17px,1.7vw,22px);font-weight:700;line-height:1.45}
.mono{font-family:var(--font-mono);font-feature-settings:"tnum" 1;letter-spacing:.06em}
.measure{max-width:720px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  color:var(--steel);text-transform:uppercase;line-height:1.6;
}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--cyan);flex:none}

/* ---------- 4. 布局 ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,40px)}
.section{position:relative;padding:clamp(48px,7vw,96px) 0}
.section--paper{background:var(--paper);color:var(--graphite)}
.section--paper .eyebrow{color:#5E6B78}
.section--paper .eyebrow::before{background:var(--lava)}
.section--ink{background:var(--ink-900)}
.section--deep{background:var(--ink-800)}
.grid{display:grid;gap:var(--gap);grid-template-columns:1fr}
.rule{height:1px;background:var(--line-dark);transform:scaleX(0);transform-origin:left center;transition:transform .24s ease}
.rule.is-visible,.reveal.is-visible .rule{transform:scaleX(1)}
.section--paper .rule{background:var(--line-light)}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid transparent;border-radius:var(--radius);
  font-size:14px;font-weight:700;line-height:1.4;letter-spacing:.02em;
  text-align:center;
  transition:transform .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--lava);color:#170A02}
.btn--primary:hover{background:#FF7C45}
.btn--ghost{background:transparent;border-color:var(--line-dark);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--white)}
.btn--amber{background:var(--amber);color:var(--graphite)}
.btn--block{width:100%}
.section--paper .btn--ghost{border-color:var(--line-light);color:var(--graphite)}
.section--paper .btn--ghost:hover{border-color:var(--lava);color:var(--lava-ink)}

/* ---------- 6. 标签 / 数字 / 图例 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:2px 8px;border:1px solid currentColor;border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;line-height:1.7;
}
.tag--lava{color:var(--lava)}
.tag--cyan{color:var(--cyan)}
.tag--amber{color:var(--amber)}
.tag--steel{color:var(--steel)}
.section--paper .tag--lava{color:var(--lava-ink)}
.section--paper .tag--cyan{color:#0F7A6A}
.section--paper .tag--amber{color:#9A5B00}
.section--paper .tag--steel{color:#5E6B78}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);font-weight:700;line-height:1;
  font-size:clamp(26px,4vw,40px);letter-spacing:.02em;color:var(--lava);
}
.stat__label{font-size:12px;letter-spacing:.08em;color:var(--steel)}
.section--paper .stat__value{color:var(--lava-ink)}
.section--paper .stat__label{color:#5E6B78}

.legend{display:flex;flex-wrap:wrap;gap:10px 20px;font-family:var(--font-mono);font-size:12px;letter-spacing:.05em;color:var(--steel)}
.legend__item{display:inline-flex;align-items:center;gap:8px}
.legend__dot{width:8px;height:8px;background:var(--cyan);flex:none}
.legend__dot--lava{background:var(--lava)}
.legend__dot--amber{background:var(--amber)}
.legend__dot--steel{background:var(--steel)}

/* ---------- 7. 面板 / 图片容器 / 折叠 ---------- */
.panel{
  position:relative;background:var(--ink-800);
  border:1px solid var(--line-dark);border-radius:var(--radius);box-shadow:var(--shadow-1);
}
.panel__head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:13px 16px;border-bottom:1px solid var(--line-dark);
}
.panel__title{font-size:15px;font-weight:700;color:var(--white)}
.panel__body{padding:16px}
.section--paper .panel{background:var(--paper-2);border-color:var(--line-light);color:var(--graphite);box-shadow:0 1px 0 rgba(255,255,255,.6),0 16px 30px -26px rgba(27,30,36,.6)}
.section--paper .panel__head{border-color:var(--line-light)}
.section--paper .panel__title{color:var(--graphite)}

.media{
  position:relative;display:block;overflow:hidden;
  background:var(--ink-800);border:1px solid var(--line-dark);border-radius:var(--radius);
}
.media__frame{
  position:relative;overflow:hidden;aspect-ratio:16/10;
  background:
    linear-gradient(var(--grid-dark) 1px,transparent 1px) 0 0/100% 22px,
    linear-gradient(90deg,var(--grid-dark) 1px,transparent 1px) 0 0/22px 100%,
    linear-gradient(135deg,var(--ink-800),#0A2038);
}
.media__img{width:100%;height:100%;object-fit:cover;object-position:center}
.media__cap{
  display:flex;align-items:baseline;gap:10px;
  padding:10px 12px;border-top:1px solid var(--line-dark);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--steel);
}
.media--wide .media__frame{aspect-ratio:21/9}
.media--tall .media__frame{aspect-ratio:3/4}
.media--square .media__frame{aspect-ratio:1/1}
.section--paper .media{background:var(--paper-2);border-color:var(--line-light)}
.section--paper .media__cap{border-color:var(--line-light);color:#5E6B78}

.fold{border:1px solid var(--line-dark);border-radius:var(--radius);background:var(--ink-800);box-shadow:var(--shadow-1)}
.fold + .fold{margin-top:10px}
.fold__btn{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 16px;text-align:left;font-size:15px;font-weight:700;color:var(--white);
}
.fold__sign{font-family:var(--font-mono);font-size:16px;color:var(--cyan);transition:transform .22s ease;flex:none}
.fold[data-open] .fold__sign{transform:rotate(45deg)}
.fold__panel{overflow:hidden;max-height:0;transition:max-height .22s ease}
.fold[data-open] .fold__panel{max-height:720px}
.fold__inner{padding:0 16px 18px;font-size:14px;color:var(--paper);border-top:1px solid var(--line-dark-soft);margin-top:0;padding-top:14px}
.section--paper .fold{background:var(--paper-2);border-color:var(--line-light)}
.section--paper .fold__btn{color:var(--graphite)}
.section--paper .fold__sign{color:var(--lava-ink)}
.section--paper .fold__inner{color:var(--graphite);border-color:var(--line-light)}

/* ---------- 8. 面包屑 ---------- */
.breadcrumb{padding:14px 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--steel)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item a:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.breadcrumb__item[aria-current="page"]{color:var(--paper)}
.breadcrumb__sep{color:var(--line-dark)}

/* ---------- 9. 跳过链接 ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 16px;border-radius:var(--radius);
  background:var(--cyan);color:var(--ink-900);
  font-size:13px;font-weight:700;letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 10. 头部：轨道导航 ---------- */
.site-header{
  position:sticky;top:0;left:0;right:0;z-index:60;
  width:100%;height:var(--header-h);
  background:rgba(7,26,43,.94);
  border-bottom:1px solid var(--line-dark);
  padding:0 clamp(14px,4vw,24px);
  -webkit-backdrop-filter:saturate(150%) blur(10px);
  backdrop-filter:saturate(150%) blur(10px);
}
.site-header::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(90deg,var(--grid-dark) 1px,transparent 1px);
  background-size:14px 100%;
}
.masthead{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:var(--header-h);
}
.masthead__brand{display:flex;align-items:center;gap:10px;min-width:0}
.masthead__mark{
  display:grid;place-items:center;flex:none;
  width:36px;height:36px;
  border:1px solid var(--cyan);border-radius:2px;
  background:rgba(43,227,198,.07);
  color:var(--cyan);font-size:16px;font-weight:800;letter-spacing:0;
}
.masthead__text{display:flex;flex-direction:column;min-width:0;line-height:1.3}
.masthead__name{font-size:15px;font-weight:800;color:var(--white);letter-spacing:.05em;white-space:nowrap}
.masthead__tag{
  font-size:11px;color:var(--steel);letter-spacing:.06em;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;
}
.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;flex:none;
  padding:8px 12px;border:1px solid var(--line-dark);border-radius:var(--radius);
  color:var(--paper);font-size:13px;font-weight:700;letter-spacing:.06em;
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--white)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform .2s ease}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__label{font-size:12px;letter-spacing:.1em}

.site-nav{
  position:fixed;top:var(--header-h);left:0;bottom:0;z-index:80;
  width:min(84vw,320px);
  display:flex;flex-direction:column;gap:6px;
  padding:22px 18px 30px;
  background:var(--ink-800);
  border-right:1px solid var(--line-dark);
  box-shadow:var(--shadow-2);
  overflow-y:auto;
  transform:translateX(-102%);
  transition:transform .28s cubic-bezier(.4,0,.2,1);
}
.site-nav[data-open]{transform:translateX(0)}
.site-nav__list{display:flex;flex-direction:column;gap:2px}
.site-nav__item{width:100%}
.site-nav__link{
  position:relative;display:flex;align-items:baseline;gap:12px;
  padding:13px 12px;
  border-left:2px solid transparent;border-radius:2px;
  color:var(--paper);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.site-nav__link:hover{background:rgba(43,227,198,.07);color:var(--white)}
.site-nav__link[aria-current="page"]{
  background:rgba(255,106,43,.12);
  border-left-color:var(--lava);
  color:var(--white);
}
.site-nav__link[aria-current="page"]::before{
  content:"";position:absolute;left:-2px;top:0;bottom:0;width:2px;background:var(--lava);
}
.site-nav__idx{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--steel);flex:none;
}
.site-nav__link[aria-current="page"] .site-nav__idx{color:var(--lava)}
.site-nav__label{font-size:15px;font-weight:700;letter-spacing:.06em}
.site-nav__meta{
  display:flex;flex-direction:column;gap:10px;
  margin-top:auto;padding-top:18px;border-top:1px solid var(--line-dark);
}
.site-nav__meta-line{font-family:var(--font-mono);font-size:11px;letter-spacing:.05em;color:var(--steel);line-height:1.7}

.nav-scrim{
  position:fixed;inset:var(--header-h) 0 0 0;z-index:70;
  width:100%;border:0;
  background:rgba(7,26,43,.66);
  -webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);
}
.nav-scrim[hidden]{display:none}

.scroll-meter{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(108,139,163,.18);overflow:hidden;pointer-events:none;
}
.scroll-meter__fill{
  display:block;height:100%;width:var(--p,0%);
  background:linear-gradient(90deg,var(--cyan),var(--lava));
  transition:width .12s linear;
}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-900);
  border-top:1px solid var(--line-dark);
  padding-top:clamp(40px,6vw,72px);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(var(--grid-dark) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-dark) 1px,transparent 1px);
  background-size:48px 48px;
}
.site-footer__inner{
  position:relative;z-index:1;
  display:grid;gap:clamp(24px,3vw,40px);
  grid-template-columns:1fr;
  padding-bottom:clamp(32px,4vw,56px);
}
.footer-brand{display:flex;flex-direction:column;gap:8px;max-width:34ch}
.footer-brand__mark{
  display:grid;place-items:center;width:40px;height:40px;
  border:1px solid var(--cyan);border-radius:2px;
  background:rgba(43,227,198,.07);color:var(--cyan);
  font-size:17px;font-weight:800;
}
.footer-brand__name{font-size:17px;font-weight:800;color:var(--white);letter-spacing:.06em}
.footer-brand__tag{font-size:13px;color:var(--steel);letter-spacing:.06em}
.footer-brand__micro{
  margin-top:4px;padding-left:10px;
  border-left:2px solid var(--amber);
  font-size:12px;line-height:1.8;color:var(--steel);
}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col__title{
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.16em;color:var(--cyan);
}
.footer-col__list{display:flex;flex-direction:column;gap:8px}
.footer-col__link{
  font-size:14px;color:var(--paper);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
  align-self:flex-start;
}
.footer-col__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact__list{display:flex;flex-direction:column;gap:10px}
.footer-contact__row{display:flex;flex-direction:column;gap:2px}
.footer-contact__key{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--steel)}
.footer-contact__val{font-size:14px;color:var(--paper);line-height:1.7;word-break:break-word}
.footer-contact__note{font-size:12px;line-height:1.8;color:var(--steel);max-width:40ch}
.site-footer__bottom{
  position:relative;z-index:1;
  border-top:1px solid var(--line-dark);
  background:rgba(14,42,68,.5);
}
.site-footer__bottom-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;padding-top:16px;padding-bottom:16px;
}
.site-footer__legal{font-size:12px;letter-spacing:.08em;color:var(--steel)}
.site-footer__copy{font-size:12px;letter-spacing:.04em;color:var(--steel)}

.to-top{
  position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:90;
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 16px;border:1px solid var(--cyan);border-radius:var(--radius);
  background:var(--ink-900);color:var(--cyan);
  font-size:13px;font-weight:700;letter-spacing:.06em;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease,background-color .18s ease,color .18s ease;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--cyan);color:var(--ink-900)}
.to-top__arrow{font-family:var(--font-mono);font-size:14px;line-height:1}

/* ---------- 12. 显现动效 ---------- */
.reveal{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s ease var(--d,0ms),transform .55s cubic-bezier(.2,.7,.3,1) var(--d,0ms);
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 13. 响应式 ---------- */
@media (max-width:479px){
  .masthead__tag{display:none}
  .to-top__text{display:none}
  .to-top{padding:12px 14px}
}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__inner{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .skip-link{left:calc(var(--rail-w) + 10px)}

  .site-header{
    position:fixed;top:0;left:0;bottom:0;right:auto;
    width:var(--rail-w);height:auto;
    display:flex;flex-direction:column;
    padding:18px 10px 16px;
    border-right:1px solid var(--line-dark);
    border-bottom:0;
    background:var(--ink-900);
    -webkit-backdrop-filter:none;backdrop-filter:none;
  }
  .site-header::before{background-image:linear-gradient(90deg,var(--grid-dark) 1px,transparent 1px);background-size:12px 100%}

  .masthead{
    flex-direction:column;align-items:center;gap:12px;
    height:auto;padding:0 0 16px;
    border-bottom:1px solid var(--line-dark);
  }
  .masthead__brand{flex-direction:column;align-items:center;gap:12px}
  .masthead__mark{width:44px;height:44px;font-size:18px}
  .masthead__text{align-items:center;gap:4px}
  .masthead__name{writing-mode:vertical-rl;font-size:14px;letter-spacing:.22em;white-space:normal}
  .masthead__tag{display:none}
  .nav-toggle{display:none}

  .site-nav{
    position:static;width:auto;height:auto;transform:none;
    background:transparent;border:0;box-shadow:none;
    padding:14px 0 0;
    flex:1;min-height:0;gap:0;
    overflow-y:auto;overflow-x:hidden;
  }
  .site-nav__list{gap:2px}
  .site-nav__link{
    flex-direction:column;align-items:flex-start;gap:3px;
    padding:9px 10px 10px 12px;
  }
  .site-nav__link::after{
    content:"";position:absolute;left:0;top:50%;width:2px;height:0;
    background:var(--cyan);transform:translateY(-50%);
    transition:height .22s ease,background-color .18s ease;
  }
  .site-nav__link:hover::after{height:56%}
  .site-nav__link[aria-current="page"]::after{height:100%;background:var(--lava)}
  .site-nav__link[aria-current="page"]::before{display:none}
  .site-nav__idx{font-size:10px}
  .site-nav__label{font-size:13px;letter-spacing:.14em;line-height:1.5}
  .site-nav__meta{gap:8px;padding-top:14px}
  .site-nav__meta-line{font-size:10px;text-align:center;letter-spacing:.02em}
  .site-nav__meta .btn{font-size:11px;padding:9px 6px;letter-spacing:0;line-height:1.45}
  .nav-scrim{display:none}

  .scroll-meter{left:auto;right:0;top:0;bottom:0;width:2px;height:auto}
  .scroll-meter__fill{width:100%;height:var(--p,0%);background:linear-gradient(180deg,var(--cyan),var(--lava));transition:height .12s linear}

  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .site-footer__inner{grid-template-columns:1.5fr 1fr 1fr 1fr 1.6fr}
}

/* ---------- 14. 无障碍与减弱动效 ---------- */
@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;
  }
  .reveal{opacity:1;transform:none}
  .rule{transform:scaleX(1)}
  .btn:hover,.to-top:hover{transform:none}
}