/* ==========================================================================
   博胜联盟 · 共享样式 /assets/site.css
   深靛蓝画布 · 铜金锚点 · 工程档案秩序
   ========================================================================== */

*,*::before,*::after{box-sizing:border-box}

:root{
  --ink:#0E1730;
  --ink-2:#1B2A4A;
  --steel:#33415C;
  --copper:#B8873A;
  --copper-lit:#E0A85C;
  --ice:#7FD1E8;
  --moss:#6B8A6E;
  --brick:#A64B3C;
  --paper:#F2EFE9;
  --mist:#AEB6C4;
  --black:#080B12;
  --text-soft:#D6DCE7;
  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --maxw:1280px;
  --radius:2px;
  --dur:280ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:104px;
}

/* ---------- 基础重置 ---------- */
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

main{padding-top:var(--header-h)}
.full-bleed-top{margin-top:calc(-1 * var(--header-h))}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.2;
  letter-spacing:.01em;
  color:var(--paper);
}

p{margin:0 0 1em}
a{color:var(--ice);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:var(--copper-lit)}
img,svg,video{max-width:100%;height:auto;display:block}
button{font-family:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
hr{border:0;height:1px;background:var(--steel);margin:0}
::selection{background:var(--copper);color:var(--black)}

:focus-visible{outline:2px solid var(--ice);outline-offset:3px;border-radius:1px}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 排版阶梯：12 / 14 / 17 / 20 / 28 / 40 / 64 / 96 ---------- */
.display-1{
  font-size:clamp(48px,8.4vw,96px);
  line-height:.98;
  font-weight:800;
  letter-spacing:-.02em;
}
.display-2{
  font-size:clamp(34px,4.8vw,64px);
  line-height:1.04;
  font-weight:800;
  letter-spacing:-.01em;
}
.section-title{
  font-size:clamp(24px,3vw,40px);
  line-height:1.2;
  font-weight:700;
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--copper-lit);
}
.lede{
  font-size:20px;
  line-height:1.7;
  color:var(--paper);
  max-width:34em;
}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.vertical-note{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:var(--steel);
}
.prose{max-width:38em}
.prose p{color:var(--text-soft);margin:0 0 1.1em}
.prose h2,.prose h3{margin:1.6em 0 .6em;font-size:20px;font-weight:700;letter-spacing:.02em}
.prose h2{font-size:28px}
.prose a{color:var(--ice);border-bottom:1px solid rgba(127,209,232,.45)}
.prose a:hover{color:var(--copper-lit);border-bottom-color:var(--copper-lit)}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 1.1em;color:var(--text-soft)}
.prose ul{list-style:none}
.prose ul li{position:relative}
.prose ul li::before{
  content:"";position:absolute;left:-1.1em;top:.85em;
  width:10px;height:1px;background:var(--copper);
}
.prose ol{list-style:decimal}
.prose li{margin:.3em 0}

/* ---------- 容器与网格 ---------- */
.container{
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 clamp(20px,5vw,64px);
}
.container--narrow{max-width:920px}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.2vw,32px);
}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-12{grid-column:span 12}

.stack{display:flex;flex-direction:column;gap:clamp(14px,1.6vw,22px)}
.stack--tight{gap:10px}

/* ---------- 区块节奏 ---------- */
.section{
  position:relative;
  padding:clamp(56px,7.5vw,112px) 0;
}
.section--ink2{background:var(--ink-2)}
.section--paper{background:var(--paper);color:#141C2E}
.section--paper h1,.section--paper h2,.section--paper h3,.section--paper .section-title{color:#0E1730}
.section--paper p,.section--paper .prose p{color:#333D52}
.section--paper .eyebrow{color:var(--copper)}
.section--paper .scale-rule{border-top-color:rgba(14,23,48,.22)}
.section--paper .lede{color:#141C2E}

/* ---------- 档案零件 ---------- */
.chapter-index{
  display:inline-flex;
  align-items:baseline;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--copper);
  border-bottom:1px solid rgba(184,135,58,.45);
  padding-bottom:6px;
}
.chapter-index__num{color:var(--copper-lit)}

.scale-rule{
  position:relative;
  height:8px;
  border-top:1px solid var(--steel);
  width:100%;
}
.scale-rule::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:6px;
  background-image:repeating-linear-gradient(to right,var(--copper) 0 1px,transparent 1px 72px);
  background-size:100% 6px;
  background-repeat:no-repeat;
  opacity:.75;
}

.plate{
  position:relative;
  padding:18px 20px;
  background:linear-gradient(180deg,var(--ink-2),#16233D);
  border:1px solid var(--steel);
  border-radius:var(--radius);
  box-shadow:inset 0 1px 0 rgba(242,239,233,.05),0 10px 26px rgba(8,11,18,.38);
}
.plate--copper{border-color:var(--copper)}
.plate--flush{padding:0;overflow:hidden}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
  border:1px solid var(--steel);
  border-radius:var(--radius);
  background:rgba(51,65,92,.28);
  white-space:nowrap;
}
.tag--moss{border-color:var(--moss);color:#A9C6AC}
.tag--brick{border-color:var(--brick);color:#E4A091}
.tag--ice{border-color:var(--ice);color:var(--ice)}
.tag--copper{border-color:var(--copper);color:var(--copper-lit)}

.stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:14px 16px;
  border-left:1px solid var(--copper);
  background:rgba(27,42,74,.55);
}
.stat__value{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:28px;
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--paper);
}
.stat__label{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mist);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mist);
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs__link{color:var(--mist);border-bottom:1px solid transparent}
.breadcrumbs__link:hover{color:var(--ice);border-bottom-color:var(--ice)}
.breadcrumbs__sep{color:var(--steel)}
.breadcrumbs__item[aria-current="page"]{color:var(--paper)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  font-size:14px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--paper);
  background:transparent;
  border:1px solid var(--steel);
  border-radius:var(--radius);
  text-decoration:none;
  cursor:pointer;
  transition:color var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn:hover{color:var(--copper-lit);border-color:var(--copper-lit);background:rgba(184,135,58,.1)}
.btn--primary{
  color:var(--black);
  font-weight:700;
  background:var(--copper);
  border-color:var(--copper);
}
.btn--primary:hover{
  color:var(--black);
  background:var(--copper-lit);
  border-color:var(--copper-lit);
}
.btn--ghost{color:var(--paper)}
.btn--ice{color:var(--ice);border-color:rgba(127,209,232,.55)}
.btn--ice:hover{color:var(--black);background:var(--ice);border-color:var(--ice)}
.btn--block{display:flex;width:100%}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background:var(--ink-2);
  border:1px solid var(--steel);
  border-radius:var(--radius);
}
.media-frame > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(127,209,232,.07) 0 1px,transparent 1px 4px);
  opacity:.55;
}
.media-frame--16x10{aspect-ratio:16/10}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--copper{border-color:var(--copper)}
.media-frame__caption{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
}

/* ---------- 跳过链接 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-64px;
  z-index:120;
  padding:10px 16px;
  font-size:14px;
  letter-spacing:.08em;
  color:var(--black);
  background:var(--copper-lit);
  border-radius:var(--radius);
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px;color:var(--black)}

/* ---------- 页头 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  color:var(--paper);
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled]{
  background:var(--ink);
  border-bottom-color:var(--copper);
  box-shadow:0 12px 32px rgba(8,11,18,.55);
}

.header-rail{
  display:flex;
  align-items:center;
  gap:14px;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 clamp(20px,5vw,64px);
  height:32px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--mist);
  border-bottom:1px solid rgba(51,65,92,.6);
}
.header-rail__mark{color:var(--copper);white-space:nowrap}
.header-rail__note{white-space:nowrap}
.header-rail__code{white-space:nowrap}
.header-rail__rule{
  flex:1 1 auto;
  min-width:24px;
  height:1px;
  background-image:repeating-linear-gradient(to right,var(--steel) 0 1px,transparent 1px 10px);
  opacity:.85;
}

.header-bar{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,36px);
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 clamp(20px,5vw,64px);
  height:72px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--paper);
}
.brand:hover{color:var(--paper)}
.brand__glyph{
  width:38px;
  height:38px;
  display:grid;
  place-items:center;
  font-family:var(--font-display);
  font-size:20px;
  font-weight:700;
  color:var(--copper-lit);
  border:1px solid var(--copper);
  border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(184,135,58,.2),rgba(184,135,58,0));
}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{font-size:20px;font-weight:700;letter-spacing:.06em;color:var(--paper)}
.brand__line{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--mist);
}

.site-nav{margin-left:auto}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(8px,1.6vw,24px);
}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:10px 2px;
  font-size:14px;
  letter-spacing:.08em;
  color:var(--mist);
  white-space:nowrap;
  transition:color var(--dur) var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:4px;
  height:1px;
  background:var(--copper-lit);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform var(--dur) var(--ease);
}
.site-nav__link:hover{color:var(--paper)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--copper-lit)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--paper);
  background:transparent;
  border:1px solid var(--steel);
  border-radius:var(--radius);
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.nav-toggle__bars{display:flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle__bars span{display:block;height:1px;background:currentColor}
.nav-toggle__label{white-space:nowrap}
.nav-toggle:hover{color:var(--copper-lit);border-color:var(--copper-lit)}
.nav-toggle[aria-expanded="true"]{color:var(--copper-lit);border-color:var(--copper)}

.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  width:100%;
  background:linear-gradient(90deg,var(--copper),var(--ice));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform 120ms linear;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--black);
  border-top:1px solid var(--copper);
  color:var(--mist);
  padding-bottom:28px;
}
.footer-scale{
  height:12px;
  background-image:
    repeating-linear-gradient(to right,var(--copper) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(to right,var(--steel) 0 1px,transparent 1px 16px);
  background-repeat:no-repeat,no-repeat;
  background-size:100% 12px,100% 6px;
  background-position:0 0,0 6px;
  opacity:.55;
}
.footer-main{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:clamp(24px,4vw,64px);
  padding-top:clamp(40px,5vw,64px);
  padding-bottom:clamp(28px,4vw,44px);
}
.footer-brand__name{
  margin:0 0 12px;
  font-family:var(--font-display);
  font-size:28px;
  font-weight:800;
  letter-spacing:.08em;
  color:var(--paper);
}
.footer-brand__blurb{
  margin:0 0 14px;
  max-width:34em;
  font-size:14px;
  line-height:1.85;
  color:var(--mist);
}
.footer-brand__meta{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(174,182,196,.68);
}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,3vw,40px);
}
.footer-col__title{
  margin:0 0 14px;
  padding-bottom:8px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--copper);
  border-bottom:1px solid rgba(51,65,92,.85);
}
.footer-col__list{display:flex;flex-direction:column;gap:10px}
.footer-col__link{
  font-size:14px;
  letter-spacing:.04em;
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-col__link:hover{color:var(--paper);border-bottom-color:var(--ice)}

.footer-contact{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:8px 28px;
  padding-top:20px;
  padding-bottom:20px;
  border-top:1px solid rgba(51,65,92,.85);
}
.footer-contact__line{
  margin:0;
  font-family:var(--font-mono);
  font-size:14px;
  letter-spacing:.02em;
  color:var(--paper);
}
.footer-contact__note{
  margin:0;
  max-width:56em;
  font-size:12px;
  line-height:1.75;
  color:rgba(174,182,196,.78);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  padding-top:16px;
  border-top:1px solid rgba(51,65,92,.85);
  font-size:12px;
  letter-spacing:.1em;
  color:rgba(174,182,196,.75);
}
.footer-base__legal{margin:0;font-family:var(--font-mono)}
.footer-base__copy{margin:0}
.to-top{
  margin-left:auto;
  padding:8px 14px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--mist);
  background:transparent;
  border:1px solid var(--steel);
  border-radius:var(--radius);
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.to-top:hover{color:var(--copper-lit);border-color:var(--copper)}

/* ---------- 显现动效 ---------- */
[data-reveal]{transition:opacity 320ms var(--ease),transform 320ms var(--ease)}
[data-reveal].is-reveal-pending{opacity:0;transform:translateY(14px)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .header-actions .btn--ghost{display:none}
}

@media (max-width:980px){
  .col-3,.col-4,.col-5,.col-6,.col-7{grid-column:span 12}
  .footer-main{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:900px){
  :root{--header-h:64px}
  .header-rail{display:none}
  .header-bar{height:64px}
  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;
    margin:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:6px clamp(20px,5vw,64px) 22px;
    background:var(--ink-2);
    border-top:1px solid var(--steel);
    border-bottom:1px solid var(--copper);
    box-shadow:0 22px 44px rgba(8,11,18,.55);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-8px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid rgba(51,65,92,.7)}
  .site-nav__item:last-child{border-bottom:0}
  .site-nav__link{display:block;padding:15px 0;font-size:17px}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{
    padding-left:14px;
    border-left:2px solid var(--copper);
    color:var(--copper-lit);
  }

  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:560px){
  body{font-size:16px}
  .brand__line{display:none}
  .header-actions .btn--primary{padding:9px 12px;font-size:12px;letter-spacing:.08em}
  .footer-cols{grid-template-columns:minmax(0,1fr);gap:22px}
  .footer-contact{padding-top:18px}
  .to-top{margin-left:0}
}

/* ---------- 无障碍：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;
  }
  [data-reveal],
  [data-reveal].is-reveal-pending{opacity:1 !important;transform:none !important}
  .scroll-progress{transition:none}
}