/* ============================================================
   天博克罗地亚主站 · 共享层 /assets/site.css
   深海蓝驾驶舱 + 米白矿物纸 · 棋盘格印记 · 青绿状态色
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --navy:#0A1A2F;
  --bridge:#102A45;
  --carbon:#07111F;
  --stone:#8C99A8;
  --paper:#F5F1E8;
  --ink:#1B2430;
  --clay:#C56A4A;
  --moss:#7FA07A;
  --red:#D7263D;
  --chalk:#FBF8F0;
  --cyan:#39F2C8;

  --line:rgba(245,241,232,.14);
  --line-2:rgba(245,241,232,.32);
  --ink-line:rgba(27,36,48,.16);
  --ink-muted:#4A5464;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-display:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --font-mono:ui-monospace,"SF Mono","Cascadia Mono","Roboto Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --header-h:68px;
  --maxw:1320px;
  --gutter:clamp(16px,4vw,56px);
  --ease:cubic-bezier(.2,.7,.2,1);
  --checker:conic-gradient(var(--red) 0 25%, var(--chalk) 0 50%, var(--red) 0 75%, var(--chalk) 0);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl,dd{margin:0}
ul,ol{padding:0}
ul[class],ol[class],nav ul{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{display:block;max-width:100%}
html[data-nav-lock="true"]{overflow:hidden}

/* ---------- 3. 中文排版与基础 ---------- */
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.65;
  color:var(--paper);
  background:var(--navy);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.14;
}
h1{font-size:clamp(2.4rem,6vw,5.2rem);line-height:1.02}
h2{font-size:clamp(1.65rem,3.4vw,2.6rem)}
h3{font-size:clamp(1.15rem,1.9vw,1.45rem);line-height:1.3}
h4{font-size:1.02rem;letter-spacing:0}
p{max-width:70ch}
.num,[data-num]{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}

:where(a,button,summary,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:2px;
}
:target{scroll-margin-top:calc(var(--header-h) + 24px)}
#main-content{display:block}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 4. 布局原子 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.offset-header{padding-top:calc(var(--header-h) + 8px)}

.section{padding-block:clamp(52px,7.5vw,116px);position:relative}
.section--bridge{background:var(--bridge)}
.section--paper{background:var(--paper);color:var(--ink)}
.section--paper .section-head__desc,
.section--paper p{color:var(--ink-muted)}
.section--paper a:not(.btn):hover{color:var(--clay)}

.grid{display:grid;gap:clamp(14px,2vw,26px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

.checker{
  background-image:var(--checker);
  background-size:12px 12px;
}

/* ---------- 5. 章节标题组 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--clay);
}
.eyebrow::before{
  content:"";width:22px;height:1px;background:var(--clay);display:block;
}
.section-head{display:grid;gap:.75rem;margin-bottom:clamp(24px,3.4vw,46px)}
.section-head__index{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.18em;
  color:var(--clay);
  padding-left:.7em;
  border-left:3px solid var(--clay);
  line-height:1.2;
}
.section-head__title{max-width:22em}
.section-head__desc{color:var(--stone);font-size:1rem;max-width:62ch}

/* ---------- 6. 按钮 / 标签 / 卡片 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55em;
  padding:.76em 1.35em;
  border:1px solid var(--line-2);
  border-radius:2px;
  font-size:.95rem;
  font-weight:600;
  line-height:1.2;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn--primary{background:var(--red);border-color:var(--red);color:var(--chalk)}
.btn--primary:hover,.btn--primary:focus-visible{background:#e0324a;border-color:#e0324a}
.btn--ghost{color:var(--chalk)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--cyan);color:var(--cyan)}
.btn--paper{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn--paper:hover{background:#2a3644;border-color:#2a3644}

.tag{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.2em .6em;
  border:1px solid var(--line-2);
  border-radius:1px;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--stone);
  line-height:1.5;
}
.tag--live{color:var(--chalk);border-color:rgba(215,38,61,.7);background:rgba(215,38,61,.18)}
.tag--paper{border-color:var(--ink-line);color:var(--ink-muted)}

.panel{
  background:var(--bridge);
  border:1px solid var(--line);
  border-radius:2px;
  padding:clamp(18px,2.4vw,28px);
}
.panel--paper{background:var(--chalk);border-color:var(--ink-line);color:var(--ink)}

/* ---------- 7. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:2px;
  background:linear-gradient(150deg,var(--bridge) 0%,var(--carbon) 100%);
  isolation:isolate;
}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--21x9{aspect-ratio:21/9}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame__img{
  width:100%;height:100%;
  object-fit:cover;
  filter:saturate(.85) contrast(1.05) brightness(.92);
}
.media-frame::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(57,242,200,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(57,242,200,.09) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.7;
}
.media-frame__cap{
  position:absolute;
  left:0;bottom:0;z-index:2;
  padding:.45em .8em;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.12em;
  color:var(--chalk);
  background:rgba(7,17,31,.72);
  border-top:1px solid var(--line);
  border-right:1px solid var(--line);
}
.section--paper .media-frame{border-color:var(--ink-line)}
.section--paper .media-frame::after{
  background-image:
    linear-gradient(rgba(10,26,47,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(10,26,47,.08) 1px,transparent 1px);
}

/* ---------- 8. 面包屑 / 长文 ---------- */
.breadcrumbs{
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.08em;
  color:var(--stone);
  padding-block:14px;
}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:.55em}
.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:.55em;color:rgba(140,153,168,.45)}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--paper)}
.section--paper .breadcrumbs [aria-current="page"]{color:var(--ink)}

.prose{max-width:72ch}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:2em;font-size:clamp(1.4rem,2.4vw,1.9rem)}
.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.25em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.45em}
.prose a{color:var(--clay);border-bottom:1px solid rgba(197,106,74,.45)}

/* ---------- 9. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:12px;
  z-index:120;
  padding:.65em 1.1em;
  background:var(--chalk);
  color:var(--ink);
  font-size:.86rem;
  font-weight:700;
  border-radius:2px;
  transform:translateY(-160%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 10. 页头 ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:90;
  color:var(--chalk);
}
.site-header__bar{
  position:relative;
  z-index:3;
  background:linear-gradient(180deg,rgba(7,17,31,.82) 0%,rgba(7,17,31,.42) 62%,rgba(7,17,31,0) 100%);
  transition:background-color .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.2vw,36px);
  min-height:var(--header-h);
  padding-block:9px;
}
.site-header.is-scrolled .site-header__bar,
.site-header[data-open="true"] .site-header__bar{
  background:var(--bridge);
  box-shadow:0 1px 0 var(--line),0 14px 34px rgba(7,17,31,.42);
}

/* 品牌 */
.brand{display:flex;align-items:center;gap:.7em;flex:none}
.brand__mark{
  display:block;
  flex:none;
  width:30px;height:30px;
  background-image:var(--checker);
  background-size:10px 10px;
  border:1px solid rgba(251,248,240,.5);
  box-shadow:0 0 0 3px rgba(215,38,61,.16);
}
.brand__text{display:grid;gap:1px;line-height:1.1}
.brand__name{font-weight:800;font-size:1rem;letter-spacing:.02em;color:var(--chalk)}
.brand__sub{
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.16em;
  color:var(--stone);
  text-transform:uppercase;
}

/* 主导航 */
.primary-nav{flex:1 1 auto;display:flex;justify-content:center}
.primary-nav__list{display:flex;align-items:center;gap:clamp(10px,1.7vw,26px)}
.nav-link{
  position:relative;
  display:inline-block;
  padding:.45em .1em;
  font-size:.94rem;
  font-weight:600;
  color:rgba(251,248,240,.78);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--cyan);
  transition:width .22s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--cyan)}
.nav-link:hover::after,.nav-link:focus-visible::after{width:14px}
.nav-link[aria-current="page"]{color:var(--chalk)}
.nav-link[aria-current="page"]::after{width:20px;background:var(--cyan)}

/* 右侧工具区 */
.header-rail{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
  flex:none;
}
.status-pill{
  display:none;
  align-items:center;
  gap:.5em;
  padding:.34em .75em .34em .6em;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(16,42,69,.62);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--chalk);
  white-space:nowrap;
}
@media (min-width:1180px){.status-pill{display:inline-flex}}
.status-pill__dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(57,242,200,.18);
  animation:status-pulse 2.8s var(--ease) infinite;
}
.status-pill__meta{color:var(--stone);font-size:.64rem;letter-spacing:.06em}
@keyframes status-pulse{0%,100%{opacity:1}50%{opacity:.34}}

.header-mail{
  display:inline-flex;align-items:center;
  padding:.46em .9em;
  border:1px solid var(--line-2);
  border-radius:2px;
  font-size:.82rem;
  font-weight:600;
  color:var(--chalk);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.header-mail:hover,.header-mail:focus-visible{border-color:var(--cyan);color:var(--cyan)}

/* 汉堡 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.55em;
  margin-left:auto;
  padding:.45em .6em;
  border:1px solid var(--line-2);
  border-radius:2px;
  color:var(--chalk);
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{
  display:block;height:2px;width:18px;
  background:currentColor;
  transition:transform .24s var(--ease),opacity .18s var(--ease);
}
.nav-toggle__label{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 进度条 */
.header-progress{
  height:2px;
  background:rgba(245,241,232,.1);
  overflow:hidden;
}
.header-progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--red) 100%);
}

/* 移动抽屉补充信息（桌面隐藏） */
.primary-nav__extra{display:none}

/* 遮罩 */
.nav-scrim{
  position:fixed;
  inset:0;
  z-index:1;
  background:rgba(7,17,31,.66);
  opacity:0;
  visibility:hidden;
  transition:opacity .26s var(--ease),visibility .26s var(--ease);
}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  background:var(--carbon);
  color:var(--stone);
  border-top:1px solid rgba(245,241,232,.08);
}
.site-footer::before{
  content:"";
  display:block;
  height:6px;
  background-image:var(--checker);
  background-size:12px 12px;
  opacity:.85;
}
.site-footer__inner{padding-block:clamp(34px,5vw,62px) 0}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr 1.15fr .9fr;
  gap:clamp(22px,3vw,48px);
  padding-bottom:clamp(26px,4vw,50px);
}
.footer-brand .brand__mark{
  width:34px;height:34px;
  background-size:11px 11px;
}
.footer-brand__name{
  margin-top:.85em;
  font-family:var(--font-display);
  font-weight:800;
  font-size:1.06rem;
  color:var(--chalk);
  letter-spacing:.01em;
}
.footer-brand__line{
  margin-top:.55em;
  font-size:.88rem;
  line-height:1.6;
  color:var(--stone);
  max-width:30ch;
}
.footer-brand__legal{
  margin-top:1em;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:rgba(140,153,168,.8);
}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--chalk);
  padding-bottom:.7em;
  margin-bottom:1em;
  border-bottom:1px solid var(--line);
}
.footer-list{display:grid;gap:.62em}
.footer-list a{
  font-size:.9rem;
  color:var(--stone);
  transition:color .18s var(--ease);
}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--cyan)}
.footer-list--contact{gap:.8em}
.footer-list--contact li{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:.7em;
  align-items:baseline;
}
.footer-list__key{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.12em;
  color:rgba(140,153,168,.72);
}
.footer-list__val{
  font-size:.88rem;
  color:var(--chalk);
  word-break:break-word;
}
.footer-cta{
  display:inline-flex;
  margin-top:1.2em;
  padding:.5em 1em;
  border:1px solid var(--line-2);
  border-radius:2px;
  font-size:.82rem;
  font-weight:600;
  color:var(--chalk);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.footer-cta:hover,.footer-cta:focus-visible{border-color:var(--cyan);color:var(--cyan)}
.footer-note{
  margin-top:1.1em;
  font-size:.8rem;
  line-height:1.65;
  color:rgba(140,153,168,.85);
  max-width:26ch;
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6em 1.5em;
  padding-block:18px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:rgba(140,153,168,.78);
}

/* ---------- 12. 滚动显现 ---------- */
.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
  transition-delay:calc(var(--i,0) * 70ms);
}
.has-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 13. 断点 ---------- */
@media (max-width:1080px){
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:960px){
  :root{--header-h:60px}
  body{font-size:16px}
  .grid--12{grid-template-columns:1fr}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:auto}
  .header-rail{display:none}
  .nav-toggle{display:inline-flex}

  .primary-nav{
    position:fixed;
    top:0;right:0;
    z-index:2;
    width:min(86vw,368px);
    height:100dvh;
    display:block;
    padding:calc(var(--header-h) + 26px) 24px 32px;
    background:var(--bridge);
    border-left:1px solid var(--line);
    box-shadow:-24px 0 60px rgba(7,17,31,.5);
    overflow-y:auto;
    transform:translateX(103%);
    transition:transform .32s var(--ease);
  }
  .site-header[data-open="true"] .primary-nav{transform:none}
  .primary-nav__list{display:grid;gap:0}
  .nav-link{
    display:block;
    padding:.92em 0;
    font-size:1.04rem;
    border-bottom:1px solid var(--line);
  }
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--cyan)}
  .primary-nav__extra{
    display:grid;
    gap:.35em;
    margin-top:1.6em;
    padding-top:1.2em;
    border-top:1px solid var(--line-2);
  }
  .primary-nav__extra-label{
    font-family:var(--font-mono);
    font-size:.7rem;
    letter-spacing:.14em;
    color:var(--red);
  }
  .primary-nav__extra-meta{
    font-family:var(--font-mono);
    font-size:.78rem;
    letter-spacing:.04em;
    color:var(--stone);
  }
  .site-header[data-open="true"] .nav-scrim{opacity:1;visibility:visible}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:720px){
  .footer-grid{grid-template-columns:1fr}
  .footer-base{justify-content:flex-start}
  .brand__sub{display:none}
  .media-frame--21x9{aspect-ratio:16/9}
}

@media (max-width:420px){
  .nav-toggle__label{display:none}
  .brand__mark{width:26px;height:26px;background-size:9px 9px}
}

/* ---------- 14. 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-reveal [data-reveal]{opacity:1;transform:none;transition:none}
  .primary-nav{transition:none}
  .header-progress__bar{transition:none}
}