/* =========================================================
   金宝搏中心 · 共享样式表  /assets/site.css
   索引系统 GB-01 … GB-08 ｜ 金属档案控制室视觉语言
   ========================================================= */

:root{
  /* 色彩体系 */
  --ink-900:#07090C;
  --ink-800:#0F141A;
  --panel-700:#171E26;
  --panel-600:#232C36;
  --line-500:#33404D;
  --gold:#C6A15B;
  --gold-light:#E8CE8A;
  --ice:#8FB9C9;
  --text:#D9E0E7;
  --text-strong:#EDF1F5;
  --muted:#6C7987;

  --gold-grad:linear-gradient(135deg,#A8813F 0%,#C6A15B 32%,#E8CE8A 54%,#C6A15B 76%,#A8813F 100%);
  --ice-grad:linear-gradient(135deg,#8FB9C9 0%,#C7DEE6 100%);

  /* 字体 */
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  /* 尺度 */
  --wrap:1240px;
  --gutter:clamp(18px,4vw,44px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --rail-top:118px;
}

/* ---------------- reset ---------------- */
*,
*::before,
*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    radial-gradient(1200px 620px at 82% -12%,rgba(198,161,91,.085),transparent 62%),
    radial-gradient(900px 520px at 4% 2%,rgba(143,185,201,.06),transparent 64%);
  background-repeat:no-repeat;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,pre{ margin:0; }
ul,ol{ margin:0; padding:0; list-style:none; }
a{ color:inherit; }
img,svg,video{ display:block; max-width:100%; }
button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
input,textarea,select{ font:inherit; }

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.25;
  letter-spacing:-.012em;
  color:var(--text-strong);
  text-wrap:balance;
}

::selection{ background:rgba(198,161,91,.34); color:#fff; }

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

/* ---------------- 布局容器 ---------------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{
  position:relative;
  padding-block:clamp(46px,6.5vw,92px);
}

.section--tint{
  background:linear-gradient(180deg,rgba(15,20,26,.92) 0%,rgba(15,20,26,.56) 46%,rgba(7,9,12,0) 100%);
  border-top:1px solid rgba(51,64,77,.45);
  border-bottom:1px solid rgba(51,64,77,.45);
}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--grid-gap,clamp(18px,2.4vw,32px));
}
[class*="span-"]{ min-width:0; }
.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-12{ grid-column:span 12; }

/* ---------------- 章节编号头 ---------------- */
.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(12px,2.2vw,30px);
  align-items:start;
  margin-bottom:clamp(26px,3.6vw,46px);
}

.section-head__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  color:var(--gold);
  padding-top:.95em;
  white-space:nowrap;
}

.section-head__title{
  font-size:clamp(25px,3.4vw,38px);
}

.section-head__note{
  margin-top:12px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--muted);
  max-width:56ch;
}

/* ---------------- 切角面板 ---------------- */
.cut-panel{
  position:relative;
  padding:clamp(18px,2.4vw,32px);
  background:linear-gradient(158deg,rgba(35,44,54,.96) 0%,rgba(15,20,26,.97) 100%);
  border:1px solid var(--line-500);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%);
  overflow:hidden;
  transition:border-color .2s var(--ease),transform .22s var(--ease);
}
.cut-panel::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(115deg,transparent 38%,rgba(232,206,138,.15) 50%,transparent 62%);
  transform:translateX(-130%);
  transition:transform .62s var(--ease);
  pointer-events:none;
}
.cut-panel:hover{
  border-color:rgba(198,161,91,.55);
  transform:translateY(-2px);
}
.cut-panel:hover::after{ transform:translateX(130%); }

/* ---------------- 编辑部目录行 ---------------- */
.catalog{ display:flex; flex-direction:column; }

.catalog__row{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  gap:clamp(12px,2vw,22px);
  align-items:center;
  padding:14px 8px;
  border-bottom:1px solid rgba(51,64,77,.5);
  transition:background-color .18s var(--ease),padding-left .18s var(--ease);
}
.catalog__row:first-child{ border-top:1px solid rgba(51,64,77,.5); }
.catalog__row:hover{
  background:linear-gradient(90deg,rgba(198,161,91,.1),transparent 62%);
  padding-left:16px;
}

.catalog__num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--gold);
}

.catalog__title{
  font-size:15.5px;
  color:var(--text-strong);
}

.catalog__meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
}

/* ---------------- 粘性侧边索引 ---------------- */
.index-rail{
  position:sticky;
  top:var(--rail-top);
  display:flex;
  flex-direction:column;
  gap:1px;
  border-left:1px solid var(--line-500);
}

.index-rail__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  margin-left:-1px;
  padding:9px 0 9px 14px;
  border-left:1px solid transparent;
  font-size:13px;
  text-decoration:none;
  color:var(--muted);
  transition:color .18s var(--ease),border-color .18s var(--ease),padding-left .18s var(--ease);
}
.index-rail__link:hover{ color:var(--text); padding-left:18px; }
.index-rail__link[aria-current="true"]{
  color:var(--gold-light);
  border-left-color:var(--gold);
}

.index-rail__code{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  color:var(--line-500);
}
.index-rail__link[aria-current="true"] .index-rail__code{ color:var(--gold); }

/* ---------------- 面包屑 ---------------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding-block:16px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
}
.breadcrumbs a{
  text-decoration:none;
  color:var(--muted);
  transition:color .18s var(--ease);
}
.breadcrumbs a:hover{ color:var(--gold-light); }
.breadcrumbs__sep{ color:var(--line-500); }
.breadcrumbs__current{ color:var(--text); }

/* ---------------- 标签 ---------------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  border:1px solid var(--line-500);
  color:var(--muted);
  white-space:nowrap;
}
.tag--gold{
  color:var(--gold-light);
  border-color:rgba(198,161,91,.52);
  background:rgba(198,161,91,.09);
}
.tag--ice{
  color:var(--ice);
  border-color:rgba(143,185,201,.45);
  background:rgba(143,185,201,.09);
}

/* ---------------- 图片容器基础规则 ---------------- */
.media{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(120% 100% at 20% 0%,rgba(198,161,91,.14),transparent 58%),
    linear-gradient(150deg,#171E26 0%,#07090C 100%);
  border:1px solid var(--line-500);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(135deg,rgba(198,161,91,.07) 0 1px,transparent 1px 10px);
  pointer-events:none;
  z-index:1;
}
.media--16x9{ aspect-ratio:16/9; }
.media--4x3{ aspect-ratio:4/3; }
.media--1x1{ aspect-ratio:1/1; }
.media--21x9{ aspect-ratio:21/9; }
.media__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  white-space:nowrap;
  border:1px solid transparent;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:transform .18s var(--ease),filter .18s var(--ease),
             background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--gold{
  background:var(--gold-grad);
  color:#0A0C0F;
}
.btn--gold:hover{ filter:brightness(1.1) saturate(1.05); transform:translateY(-1px); }
.btn--ghost{
  background:transparent;
  color:var(--text);
  border-color:var(--line-500);
}
.btn--ghost:hover{
  color:var(--gold-light);
  border-color:rgba(198,161,91,.62);
}
.btn--compact{
  padding:9px 16px;
  font-size:13px;
}

/* =========================================================
   头部：三段式命令栏
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:
    radial-gradient(120% 260% at 6% -80%,rgba(198,161,91,.22),transparent 58%),
    linear-gradient(180deg,rgba(15,20,26,.97) 0%,rgba(7,9,12,.985) 100%);
  border-bottom:1px solid var(--line-500);
}

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 18px;
  background:var(--gold-grad);
  color:#0A0C0F;
  font-weight:700;
  font-size:14px;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.skip-link:focus{ transform:translateY(0); }

.header-rail{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:8px var(--gutter);
  max-height:44px;
  overflow:hidden;
  border-bottom:1px solid rgba(51,64,77,.55);
  transition:max-height .28s var(--ease),padding .28s var(--ease),
             opacity .22s var(--ease),border-color .28s var(--ease);
}
.header-rail__label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--gold);
  white-space:nowrap;
}
.header-rail__status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  overflow:hidden;
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--muted);
  white-space:nowrap;
  text-overflow:ellipsis;
}
.header-rail__dot{
  flex:0 0 auto;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--ice);
  box-shadow:0 0 0 3px rgba(143,185,201,.14);
}

.command-bar{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(14px,2.2vw,34px);
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:11px var(--gutter);
  transition:padding .28s var(--ease);
}
.site-header[data-condensed] .header-rail{
  max-height:0;
  padding-top:0;
  padding-bottom:0;
  opacity:0;
  border-bottom-color:transparent;
}
.site-header[data-condensed] .command-bar{
  padding-top:7px;
  padding-bottom:7px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  padding:2px 0;
  text-decoration:none;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  background:var(--gold-grad);
  color:#0A0C0F;
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  transition:filter .2s var(--ease);
}
.brand:hover .brand__mark{ filter:brightness(1.12) saturate(1.08); }

.brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.2;
}
.brand__name{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  letter-spacing:.1em;
  color:var(--text-strong);
}
.brand__sub{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.18em;
  color:var(--muted);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border:1px solid var(--line-500);
  background:var(--panel-700);
  color:var(--text);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{ border-color:rgba(198,161,91,.6); color:var(--gold-light); }
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:16px;
}
.nav-toggle__bars span{
  display:block;
  height:1.5px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){ transform:translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){ transform:translateY(-5.5px) rotate(-45deg); }
.nav-toggle__label{ line-height:1; }

.primary-nav{
  flex:1 1 auto;
  display:flex;
  justify-content:center;
}
.primary-nav__list{
  display:flex;
  align-items:stretch;
  gap:2px;
}
.primary-nav__list > li{ display:flex; }

.primary-nav__list a{
  position:relative;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:1px;
  padding:6px 11px;
  text-decoration:none;
  color:var(--text);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.primary-nav__list a::after{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  bottom:1px;
  height:1px;
  background:var(--gold-grad);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.primary-nav__list a:hover{ color:#fff; }
.primary-nav__list a:hover::after{ transform:scaleX(1); }

.primary-nav__list a[aria-current="page"]{ color:var(--gold-light); }
.primary-nav__list a[aria-current="page"]::after{ transform:scaleX(1); }

.primary-nav__code{
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.18em;
  color:var(--muted);
  transition:color .18s var(--ease);
}
.primary-nav__list a:hover .primary-nav__code,
.primary-nav__list a[aria-current="page"] .primary-nav__code{ color:var(--gold); }

.primary-nav__label{
  font-size:13.5px;
  font-weight:500;
  letter-spacing:.03em;
  white-space:nowrap;
}

.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex:0 0 auto;
}
.header-actions__meta{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.14em;
  color:var(--muted);
  white-space:nowrap;
}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--gold-grad);
  transform:scaleX(0);
  transform-origin:0 50%;
  will-change:transform;
}

/* =========================================================
   页脚：档案柜底层
   ========================================================= */
.site-footer{
  position:relative;
  background:
    radial-gradient(90% 140% at 88% 0%,rgba(198,161,91,.11),transparent 60%),
    linear-gradient(180deg,rgba(15,20,26,.94) 0%,rgba(7,9,12,1) 100%);
  border-top:1px solid var(--line-500);
  color:var(--muted);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:2px;
  background:var(--gold-grad);
  opacity:.9;
}

.footer-frame{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:clamp(44px,6vw,76px) var(--gutter) 26px;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1.35fr;
  gap:clamp(24px,4vw,56px);
  align-items:start;
}

.footer-brand__line{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:800;
  letter-spacing:.06em;
  color:var(--text-strong);
}
.footer-brand__desc{
  margin-top:12px;
  max-width:34ch;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}
.footer-brand__tag{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:18px;
}

.footer-nav__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold);
}

.footer-links{
  display:flex;
  flex-direction:column;
  gap:9px;
}
.footer-links a{
  font-size:14px;
  color:#A9B4BF;
  text-decoration:none;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer-links a:hover{
  color:var(--gold-light);
  padding-left:4px;
}
.footer-links--plain{ gap:8px; }

.footer-contact__item{
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.6;
  letter-spacing:.02em;
  color:#A9B4BF;
  word-break:break-word;
}
.footer-contact__note{
  margin-top:14px;
  padding-top:12px;
  border-top:1px solid rgba(51,64,77,.6);
  font-size:12.5px;
  line-height:1.8;
  color:var(--muted);
}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 26px;
  margin-top:clamp(32px,5vw,56px);
  padding-top:20px;
  border-top:1px solid rgba(51,64,77,.6);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
}
.footer-legal__contact{ color:#9AA6B2; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1080px){
  .nav-toggle{ display:inline-flex; }

  .brand{ order:1; margin-right:auto; }
  .header-actions{ order:2; }
  .nav-toggle{ order:3; }
  .primary-nav{ order:4; }

  .header-actions__meta{ display:none; }

  .primary-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    justify-content:flex-start;
    width:100%;
    max-height:calc(100vh - 110px);
    overflow-y:auto;
    padding:10px var(--gutter) 20px;
    background:linear-gradient(180deg,#0F141A 0%,#07090C 100%);
    border:1px solid var(--line-500);
    border-top:0;
    box-shadow:0 26px 60px rgba(0,0,0,.62);
  }
  .primary-nav[data-open]{ display:flex; }

  .primary-nav__list{
    flex-direction:column;
    gap:0;
    width:100%;
  }
  .primary-nav__list a{
    flex-direction:row;
    align-items:baseline;
    gap:14px;
    padding:13px 4px;
    border-bottom:1px solid rgba(51,64,77,.5);
  }
  .primary-nav__list a::after{ display:none; }
  .primary-nav__label{ font-size:15.5px; }
  .primary-nav__code{ font-size:10px; }

  :root{ --rail-top:88px; }
}

@media (max-width:900px){
  .span-3,
  .span-4,
  .span-5{ grid-column:span 6; }
  .span-7,
  .span-8{ grid-column:span 12; }

  .footer-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:clamp(24px,4vw,40px);
  }
  .footer-brand{ grid-column:1 / -1; }

  .index-rail{
    position:static;
    flex-direction:row;
    flex-wrap:wrap;
    gap:6px 14px;
    border-left:0;
    border-top:1px solid var(--line-500);
    padding-top:12px;
  }
  .index-rail__link{
    margin-left:0;
    padding:5px 0;
    border-left:0;
  }
  .index-rail__link:hover{ padding-left:0; }
}

@media (max-width:640px){
  .header-rail__status{ max-width:58%; }
  .brand__sub{ display:none; }
  .brand__mark{ width:38px; height:38px; }

  .section-head{
    grid-template-columns:minmax(0,1fr);
    gap:8px;
  }
  .section-head__index{ padding-top:0; }

  .footer-grid{ grid-template-columns:minmax(0,1fr); }
  .footer-brand{ grid-column:auto; }
  .footer-legal{ gap:8px 18px; }
}

@media (max-width:520px){
  .header-actions{ display:none; }
  .catalog__row{
    grid-template-columns:auto minmax(0,1fr);
    row-gap:4px;
  }
  .catalog__meta{ grid-column:2; }
}

/* ---------------- 可访问性：减少动效 ---------------- */
@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;
  }
  .cut-panel:hover{ transform:none; }
  .btn--gold:hover{ transform:none; }
}