/* ============================================================
   澳博CN · 共享站点样式 /assets/site.css
   数字航站楼 · 双轨时间轴
   ============================================================ */

:root{
  /* 矿物色系 */
  --abyss:#0B2A3A;
  --abyss-700:#123F57;
  --signal:#F26A2E;
  --signal-soft:#FF8A55;
  --mist:#A8C7C5;
  --sand:#E7D7BD;
  --paper:#F7F1E6;
  --paper-hi:#FFFCF3;
  --stone:#5C6868;
  --moss:#5D7457;
  --clay:#B7664F;
  --ink:#17252B;

  /* 字体 */
  --font-display:"Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;

  /* 尺寸 */
  --page-max:1240px;
  --gutter:clamp(1.1rem,4vw,3.5rem);
  --radius-lg:28px;
  --radius-md:18px;
  --radius-pill:999px;

  /* 动效 */
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:220ms;

  color-scheme:light;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(1rem,.94rem + .25vw,1.125rem);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.01em;
  margin:0 0 .6em;
  color:var(--ink);
}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.2em}
a{color:inherit}
img,svg,video{max-width:100%}
button{font:inherit}
::selection{background:var(--signal);color:#fff}
:focus-visible{
  outline:3px solid var(--signal);
  outline-offset:3px;
  border-radius:4px;
}
#main-content{scroll-margin-top:clamp(4.4rem,11vw,6rem)}

/* 顶置橙色路径线（滚动进度） */
body::before{
  content:"";
  position:fixed;
  inset:0 0 auto 0;
  height:3px;
  z-index:120;
  background:linear-gradient(90deg,var(--signal),var(--signal-soft));
  transform:scaleX(var(--scroll-progress,0));
  transform-origin:0 50%;
  pointer-events:none;
}

/* ---------- 通用工具 ---------- */
.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;border:0;
  clip:rect(0 0 0 0);clip-path:inset(50%);
  overflow:hidden;white-space:nowrap;
}
.skip-link{
  position:fixed;
  top:.6rem;left:.6rem;
  z-index:200;
  transform:translateY(-180%);
  padding:.62rem 1.1rem;
  border-radius:var(--radius-pill);
  background:var(--signal);
  color:#20120A;
  font-family:var(--font-display);
  font-weight:700;
  font-size:.9rem;
  text-decoration:none;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- 布局容器 ---------- */
.container{
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.container--narrow{max-width:860px}
.section{padding-block:clamp(2.4rem,6vw,5rem)}
.section-head{display:grid;gap:.55rem;margin-bottom:clamp(1.3rem,3vw,2.2rem)}
.rule{height:1px;border:0;background:rgba(92,104,104,.28);margin-block:clamp(1.6rem,4vw,2.6rem)}
.split{
  display:grid;
  gap:clamp(1.2rem,3vw,2.6rem);
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  align-items:start;
}
.grid-cards{
  display:grid;
  gap:clamp(.9rem,2vw,1.4rem);
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
}

/* ---------- 排版 ---------- */
.display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(3rem,9vw,8rem);
  line-height:.94;
  letter-spacing:-.035em;
  margin:0;
}
.section-title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.7rem,3.4vw,2.8rem);
  line-height:1.08;
  letter-spacing:-.02em;
  margin:0;
}
.lede{
  font-size:clamp(1.02rem,1.35vw,1.22rem);
  line-height:1.78;
  color:var(--stone);
  max-width:52ch;
  margin:0;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  margin:0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--stone);
}
.eyebrow::before{
  content:"";
  width:1.5rem;height:2px;
  border-radius:2px;
  background:currentColor;
}
.eyebrow--signal{color:var(--signal)}
.meta-mono{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.06em;
  color:var(--stone);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.74rem 1.4rem;
  border-radius:var(--radius-pill);
  border:1.5px solid transparent;
  font-family:var(--font-display);
  font-weight:700;
  font-size:.95rem;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.btn--primary{background:var(--signal);color:#20120A}
.btn--primary:hover{background:var(--signal-soft);transform:translateY(-2px)}
.btn--ghost{border-color:rgba(11,42,58,.3);color:var(--abyss);background:transparent}
.btn--ghost:hover{border-color:var(--abyss);background:rgba(11,42,58,.06)}
.btn--ghost-light{border-color:rgba(247,241,230,.42);color:var(--paper);background:transparent}
.btn--ghost-light:hover{border-color:var(--mist);background:rgba(168,199,197,.12)}
.btn--quiet{
  padding:.2rem .1rem;
  color:var(--abyss);
  background:none;
  border:0;
  border-radius:4px;
  text-decoration:underline;
  text-underline-offset:5px;
  text-decoration-color:var(--signal);
}
.btn--quiet:hover{color:var(--signal)}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.26rem .72rem;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  background:rgba(168,199,197,.3);
  color:var(--abyss);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.1em;
  line-height:1.5;
  white-space:nowrap;
}
.tag--signal{background:rgba(242,106,46,.14);color:#9B3D12;border-color:rgba(242,106,46,.38)}
.tag--clay{background:rgba(183,102,79,.15);color:#8A4433;border-color:rgba(183,102,79,.38)}
.tag--moss{background:rgba(93,116,87,.16);color:#455841;border-color:rgba(93,116,87,.38)}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  padding:clamp(1.05rem,2.2vw,1.6rem);
  border:1px solid rgba(92,104,104,.2);
  border-radius:var(--radius-lg);
  background:var(--paper-hi);
}
.card--folder{
  border-radius:4px var(--radius-lg) var(--radius-lg) var(--radius-lg);
  border-left:6px solid var(--signal);
}
.card-title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.12rem;
  line-height:1.35;
  margin:0 0 .5em;
}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin-bottom:clamp(1rem,2.4vw,1.8rem)}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  gap:.15rem;
  list-style:none;
  margin:0;
  padding:0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--stone);
}
.breadcrumb-item + .breadcrumb-item::before{
  content:"/";
  margin-right:.45rem;
  color:rgba(92,104,104,.5);
}
.breadcrumb-item a{text-decoration:none;border-bottom:1px solid rgba(92,104,104,.35)}
.breadcrumb-item a:hover{color:var(--abyss);border-color:var(--signal)}
.breadcrumb-item[aria-current="page"]{color:var(--abyss)}

/* ---------- 图片容器（页面阶段放占位） ---------- */
.media{
  position:relative;
  overflow:hidden;
  isolation:isolate;
  aspect-ratio:16/10;
  border-radius:var(--radius-lg);
  background-image:
    repeating-linear-gradient(135deg,rgba(168,199,197,.13) 0 2px,transparent 2px 13px),
    linear-gradient(150deg,var(--abyss-700),var(--abyss));
}
.media img,
.media video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}

/* ============================================================
   页头 / 站点导航
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--abyss);
  color:var(--paper);
  border-bottom:1px solid rgba(168,199,197,.24);
}
.header-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.9rem;
  width:100%;
  max-width:var(--page-max);
  margin-inline:auto;
  padding:clamp(.7rem,1.5vw,1rem) var(--gutter);
}

/* 品牌方碑 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  text-decoration:none;
  color:var(--paper);
  padding-block:.1rem;
}
.brand-mark{
  position:relative;
  flex:none;
  width:2.15rem;
  height:2.15rem;
  border-radius:16px 16px 16px 4px;
  background:linear-gradient(140deg,var(--signal) 0 46%,var(--mist) 46% 100%);
  box-shadow:inset 0 0 0 1px rgba(247,241,230,.28);
  transition:transform var(--dur) var(--ease);
}
.brand-mark::after{
  content:"";
  position:absolute;
  right:5px;bottom:5px;
  width:.42rem;height:.42rem;
  border-radius:50%;
  background:var(--abyss);
}
.brand:hover .brand-mark{transform:rotate(-6deg)}
.brand-text{display:grid;gap:.16rem;line-height:1.05}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.1rem;
  letter-spacing:.02em;
}
.brand-line{
  font-family:var(--font-mono);
  font-size:.62rem;
  letter-spacing:.22em;
  color:var(--mist);
}

/* 周三更新期号 */
.header-ticker{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  margin:0 0 0 auto;
  padding:.34rem .82rem;
  border:1px solid rgba(168,199,197,.32);
  border-radius:var(--radius-pill);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.12em;
  color:rgba(247,241,230,.74);
  white-space:nowrap;
}
.ticker-dot{
  width:.42rem;height:.42rem;
  flex:none;
  border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 0 3px rgba(242,106,46,.2);
}
.ticker-mono{color:var(--sand);letter-spacing:.08em}

/* 导航 */
.site-nav{display:block}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(.2rem,1.2vw,1rem);
  margin:0;
  padding:0;
  list-style:none;
}
.nav-item{flex:none}
.nav-link{
  position:relative;
  display:inline-block;
  padding:.5rem .18rem;
  font-family:var(--font-display);
  font-size:.94rem;
  font-weight:500;
  letter-spacing:.02em;
  color:rgba(247,241,230,.76);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:.05rem;
  height:2px;
  border-radius:2px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--paper)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--paper);font-weight:800}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  margin-left:.2rem;
  padding:.5rem .92rem .5rem .78rem;
  border:1px solid rgba(168,199,197,.4);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.12em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--mist);background:rgba(168,199,197,.12)}
.nav-toggle-bars{display:grid;gap:4px;width:16px}
.nav-toggle-bar{
  display:block;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.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}

@keyframes navDrop{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:none}
}

/* ============================================================
   页脚 / 到达层
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,7rem);
  padding:clamp(2.4rem,5vw,4rem) 0 clamp(1.3rem,3vw,2rem);
  background:var(--abyss);
  color:var(--paper);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  right:-12%;
  top:-30%;
  width:70%;
  height:150%;
  background:linear-gradient(150deg,rgba(242,106,46,.16),rgba(168,199,197,.05) 55%,transparent 72%);
  pointer-events:none;
}
.footer-top{
  position:relative;
  display:grid;
  gap:clamp(1.6rem,4vw,2.8rem);
  grid-template-columns:minmax(0,1.15fr) minmax(0,.72fr) minmax(0,.72fr) minmax(0,1.15fr);
  align-items:start;
  max-width:var(--page-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.brand--footer{margin-bottom:.2rem}
.footer-statement{
  margin:.9rem 0 0;
  max-width:24ch;
  font-family:var(--font-serif);
  font-size:clamp(1.02rem,1.5vw,1.24rem);
  line-height:1.65;
  color:var(--sand);
}
.footer-meta{
  margin:.75rem 0 0;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.16em;
  color:rgba(168,199,197,.8);
}
.footer-col{min-width:0}
.footer-heading{
  margin:0 0 .85rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer-list{
  display:grid;
  gap:.55rem;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-list a{
  font-size:.94rem;
  color:rgba(247,241,230,.8);
  text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.footer-list a:hover{
  color:var(--paper);
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-color:var(--signal);
}
.footer-contact{
  display:grid;
  gap:.55rem;
  padding:1rem 1.1rem 1.1rem;
  border:1px solid rgba(168,199,197,.3);
  border-radius:var(--radius-md);
  background:linear-gradient(150deg,rgba(18,63,87,.9),rgba(11,42,58,.55));
}
.footer-contact .footer-heading{margin-bottom:.25rem}
.footer-contact-item{
  display:flex;
  gap:.65rem;
  align-items:baseline;
  margin:0;
  font-size:.9rem;
  line-height:1.6;
  color:rgba(247,241,230,.86);
}
.footer-contact-key{
  flex:none;
  width:2.6rem;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
  color:var(--mist);
}
.footer-contact-value{min-width:0;overflow-wrap:anywhere}
.footer-note{
  margin:.4rem 0 0;
  padding-top:.6rem;
  border-top:1px dashed rgba(168,199,197,.32);
  font-size:.76rem;
  line-height:1.65;
  color:rgba(247,241,230,.62);
}
.footer-bottom{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem 1.5rem;
  max-width:var(--page-max);
  margin:clamp(1.8rem,4vw,2.8rem) auto 0;
  padding:1rem var(--gutter) 0;
  border-top:1px solid rgba(168,199,197,.24);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.06em;
  color:rgba(247,241,230,.62);
}
.footer-copy,.footer-legal{margin:0}
.footer-legal-list{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem 1.1rem;
  margin:0 0 0 auto;
  padding:0;
  list-style:none;
}
.footer-legal-list a{
  color:inherit;
  text-decoration:none;
  border-bottom:1px solid rgba(242,106,46,.45);
  padding-bottom:1px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-legal-list a:hover{color:var(--paper);border-color:var(--signal)}

/* ============================================================
   进入视口显现（JS 协议：data-reveal）
   ============================================================ */
html[data-js] [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .52s var(--ease),transform .52s var(--ease);
}
html[data-js] [data-reveal].is-revealed{opacity:1;transform:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .footer-top{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:900px){
  .header-inner{row-gap:.2rem}
  .header-ticker{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .site-nav{
    order:5;
    flex-basis:100%;
    width:100%;
    display:none;
    margin-top:.55rem;
    padding-top:.35rem;
    border-top:1px solid rgba(168,199,197,.24);
  }
  .site-nav[data-open]{display:block;animation:navDrop var(--dur) var(--ease) both}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item + .nav-item .nav-link{border-top:1px solid rgba(247,241,230,.1)}
  .nav-link{display:block;padding:.85rem .2rem;font-size:1.05rem}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--signal)}
  .split{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:680px){
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-legal-list{margin-left:0}
  .footer-bottom{gap:.45rem .9rem}
}

/* ============================================================
   无障碍 · 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;
  }
  html[data-js] [data-reveal]{
    opacity:1!important;
    transform:none!important;
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child{transform:rotate(-45deg)}
}