/* =========================================================
   利记主页 · 共享样式 /assets/site.css
   蓝图档案体系：墨蓝底 · 铜金索引 · 青瓷绿校对
   ========================================================= */

/* 1. Reset ------------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
hr{border:0}
[hidden]{display:none !important}

/* 2. Tokens ----------------------------------------------- */
:root{
  --ink-900:#070D14;
  --ink-800:#0A1622;
  --ink-700:#12293D;
  --line:#24384B;
  --brass:#B9883F;
  --brass-soft:#E0BC82;
  --amber:#F08A24;
  --celadon:#2FA98C;
  --paper:#F5F1E8;
  --slate:#93A3B3;
  --text-1:#E7EDF3;
  --text-2:#A9B8C6;
  --on-paper-1:#0A1622;
  --on-paper-2:#3B4C5C;
  --brass-ink:#8A5A12;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-body:"Noto Sans SC","Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --step-1:12px;
  --step-2:14px;
  --step-3:17px;
  --step-4:22px;
  --step-5:30px;
  --step-6:44px;
  --step-7:64px;

  --space-section:96px;
  --shell:1320px;
  --gutter:24px;
  --cut:24px;
}

/* 3. Base ------------------------------------------------- */
body{
  background-color:var(--ink-800);
  color:var(--text-1);
  font-family:var(--font-body);
  font-size:var(--step-3);
  line-height:1.75;
  letter-spacing:0.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:0.04;
  background-image:radial-gradient(var(--paper) 0.5px,transparent 0.5px);
  background-size:3px 3px;
}
main{display:block;position:relative;z-index:2}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.12;
  letter-spacing:-0.01em;
  color:#FFFFFF;
}
h1{font-size:clamp(38px,5.4vw,var(--step-7))}
h2{font-size:clamp(28px,3.4vw,var(--step-6))}
h3{font-size:clamp(22px,2.2vw,var(--step-5))}
h4{font-size:var(--step-4)}
p{max-width:78ch}
strong{font-weight:700;color:#FFFFFF}
small{font-size:var(--step-1)}

::selection{background:var(--amber);color:#160A00}

:focus-visible{
  outline:2px solid var(--brass);
  outline-offset:3px;
}
.skip-link:focus-visible{outline-color:var(--paper)}

/* 4. 排版工具 --------------------------------------------- */
.mono,.t-mono{
  font-family:var(--font-mono);
  font-size:var(--step-2);
  letter-spacing:0.04em;
  color:var(--brass-soft);
}
.t-lead{font-size:var(--step-4);line-height:1.65;color:var(--text-2);max-width:60ch}
.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--brass);
}
.index-figure{
  font-family:var(--font-mono);
  font-size:clamp(64px,13vw,120px);
  line-height:0.9;
  letter-spacing:-0.02em;
  color:var(--brass);
  font-weight:400;
}
.section-head{
  display:grid;
  gap:12px;
  padding-bottom:28px;
  border-bottom:1px solid var(--line);
  margin-bottom:48px;
}
.section-head__title{font-size:clamp(26px,3vw,var(--step-5))}
.section-head__meta{
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.08em;
  color:var(--slate);
  text-transform:uppercase;
}
.rule{height:1px;background:var(--line);width:100%}
.slash{
  display:block;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--brass) 18%,var(--brass) 62%,transparent);
  transform:rotate(-1.6deg);
  transform-origin:left center;
  opacity:0.75;
}

/* 5. 布局 ------------------------------------------------- */
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:var(--space-section)}
.section--tight{padding-block:48px}
.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gutter);
}
.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--thirds{grid-template-columns:repeat(3,minmax(0,1fr))}

/* 6. 页头 ------------------------------------------------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background-color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.scroll-progress{
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  z-index:61;
  background:linear-gradient(90deg,var(--brass),var(--amber));
}
.header-rail{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:8px 0;
  border-bottom:1px dashed var(--line);
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.06em;
  color:var(--slate);
}
.header-rail__note::before{content:"▚ ";color:var(--brass)}
.header-rail__links{display:flex;gap:18px}
.rail-link{
  color:var(--brass-soft);
  border-bottom:1px solid transparent;
  transition:color 0.18s ease,border-color 0.18s ease;
}
.rail-link:hover{color:var(--amber);border-bottom-color:var(--amber)}

.header-main{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding-block:14px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  flex:0 0 auto;
  border:1px solid var(--brass);
  color:var(--brass);
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  background-color:rgba(185,136,63,0.08);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
}
.brand__text{display:grid;gap:2px}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  line-height:1.2;
  letter-spacing:0.02em;
  color:#FFFFFF;
}
.brand__note{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.08em;
  color:var(--slate);
}
.brand:hover .brand__mark{background-color:rgba(240,138,36,0.16);border-color:var(--amber);color:var(--amber)}
.brand--footer .brand__name{font-size:24px}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border:1px solid var(--line);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.08em;
}
.nav-toggle:hover{border-color:var(--brass);color:var(--brass-soft)}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background-color:var(--brass-soft);
}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background-color:var(--brass-soft);
  transition:transform 0.24s ease;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.site-header[data-open] .nav-toggle__bars{background-color:transparent}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}
.site-header[data-open] .nav-toggle{border-color:var(--brass);color:var(--brass-soft)}

.site-nav{flex:1 1 auto;display:flex;justify-content:flex-end}
.site-nav__list{display:flex;align-items:center;gap:4px}
.site-nav__item{display:block}
.site-nav__link{
  position:relative;
  display:block;
  padding:10px 16px;
  font-size:15px;
  font-weight:600;
  color:var(--slate);
  transition:color 0.18s ease;
}
.site-nav__link::before{
  content:"";
  position:absolute;
  left:2px;
  top:50%;
  width:2px;
  height:0;
  transform:translateY(-50%);
  background-color:var(--brass);
  transition:height 0.24s ease,background-color 0.18s ease;
}
.site-nav__link:hover{color:var(--paper)}
.site-nav__link:hover::before{height:18px}
.site-nav__link[aria-current="page"]{color:#FFFFFF}
.site-nav__link[aria-current="page"]::before{height:26px;background-color:var(--brass)}

/* 7. 页脚 ------------------------------------------------- */
.site-footer{
  position:relative;
  z-index:2;
  margin-top:var(--space-section);
  background-color:var(--ink-900);
  border-top:1px solid var(--line);
}
.footer-band{
  height:24px;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(to right,rgba(185,136,63,0.18) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(185,136,63,0.18) 1px,transparent 1px);
  background-size:24px 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.15fr 2fr 1fr;
  gap:48px;
  padding-block:72px 48px;
}
.footer-slogan{
  margin-top:20px;
  font-family:var(--font-display);
  font-size:22px;
  line-height:1.5;
  color:var(--paper);
  max-width:22ch;
}
.footer-mark{
  margin-top:12px;
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.06em;
  color:var(--slate);
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-weight:400;
  font-size:var(--step-1);
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--brass);
}
.footer-col__list{display:grid;gap:8px}
.footer-col__link{
  font-size:15px;
  color:var(--slate);
  border-bottom:1px solid transparent;
  transition:color 0.18s ease,border-color 0.18s ease;
}
.footer-col__link:hover{color:var(--paper);border-bottom-color:var(--brass)}
.footer-contact{display:grid;gap:14px;align-content:start}
.footer-contact__row{display:grid;gap:2px}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.12em;
  color:var(--brass);
}
.footer-contact__value{font-size:15px;color:var(--text-1)}
.footer-note{
  padding-left:12px;
  border-left:2px solid var(--celadon);
  font-size:13px;
  line-height:1.7;
  color:var(--slate);
  max-width:36ch;
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 24px;
  padding-block:20px 32px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.04em;
  color:var(--slate);
}
.footer-legal{margin:0}
.footer-icp{color:var(--brass-soft)}

/* 8. 组件 ------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid var(--line);
  background-color:transparent;
  color:var(--text-1);
  font-size:15px;
  font-weight:600;
  letter-spacing:0.02em;
  transition:background-color 0.2s ease,border-color 0.2s ease,color 0.2s ease;
}
.btn:hover{border-color:var(--brass);color:var(--brass-soft);background-color:rgba(185,136,63,0.1)}
.btn--primary{
  background-color:var(--amber);
  border-color:var(--amber);
  color:#180B00;
}
.btn--primary:hover{background-color:#FF9B3A;border-color:#FF9B3A;color:#180B00}
.btn--ghost{border-color:var(--brass);color:var(--brass-soft)}
.btn--ghost:hover{border-color:var(--amber);color:var(--amber);background-color:rgba(240,138,36,0.08)}
.btn--quiet{padding-inline:0;border-color:transparent;color:var(--slate)}
.btn--quiet:hover{background-color:transparent;color:var(--paper);border-color:transparent}

.crumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.04em;
  color:var(--slate);
}
.crumbs li{display:flex;gap:8px;align-items:center}
.crumbs li::after{content:"/";color:var(--line)}
.crumbs li:last-child::after{content:""}
.crumbs a:hover{color:var(--brass-soft)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.06em;
  color:var(--slate);
}
.tag--amber{color:var(--amber);border-color:rgba(240,138,36,0.5)}
.tag--celadon{color:var(--celadon);border-color:rgba(47,169,140,0.5)}

.panel{
  padding:32px;
  background-color:var(--ink-700);
  border:1px solid var(--line);
}
.panel--cut{
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}

.index-nav{display:grid;gap:2px}
.index-link{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:12px 16px;
  border-left:2px solid transparent;
  color:var(--slate);
  font-size:15px;
  transition:color 0.2s ease,border-color 0.2s ease,background-color 0.2s ease;
}
.index-link:hover{color:var(--paper);background-color:rgba(36,56,75,0.6)}
.index-link[aria-current="true"],
.index-link[aria-current="page"]{
  color:#FFFFFF;
  border-left-color:var(--brass);
  background-color:rgba(36,56,75,0.6);
}
.index-link__num{font-family:var(--font-mono);font-size:var(--step-1);color:var(--brass)}

.tabs{display:grid}
.tablist{
  display:flex;
  flex-wrap:wrap;
  border-bottom:1px solid var(--line);
}
.tab{
  position:relative;
  padding:12px 18px;
  border-bottom:2px solid transparent;
  font-size:15px;
  font-weight:600;
  color:var(--slate);
  transition:color 0.2s ease,border-color 0.24s ease,background-color 0.2s ease;
}
.tab:hover{color:var(--paper);background-color:rgba(36,56,75,0.5)}
.tab[aria-selected="true"]{
  color:#FFFFFF;
  border-bottom-color:var(--amber);
  background-color:rgba(36,56,75,0.45);
}
.tabpanel{padding-block:28px;outline:none}
.tabpanel:focus-visible{outline:2px solid var(--brass);outline-offset:4px}

.media{
  position:relative;
  display:block;
  overflow:hidden;
  background-color:var(--ink-700);
  border:1px solid var(--line);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--square{aspect-ratio:1/1}
.media--wide{aspect-ratio:21/9}
.media--empty{
  background-image:repeating-linear-gradient(45deg,rgba(185,136,63,0.14) 0 2px,transparent 2px 12px);
}
.media__badge{
  position:absolute;
  top:0;
  left:0;
  z-index:2;
  padding:4px 8px;
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background-color:var(--ink-900);
  color:var(--brass-soft);
  font-family:var(--font-mono);
  font-size:var(--step-1);
  letter-spacing:0.04em;
}
.media-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:16px;
}

.prose{
  max-width:72ch;
  font-size:18px;
  line-height:1.75;
  color:var(--text-1);
}
.prose p{margin-bottom:1.2em}
.prose p:last-child{margin-bottom:0}
.prose h2,.prose h3{margin:1.6em 0 0.6em}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.2em;list-style:disc}
.prose li{margin-bottom:0.4em}

.zone-paper{
  background-color:var(--paper);
  color:var(--on-paper-2);
}
.zone-paper h1,.zone-paper h2,.zone-paper h3,.zone-paper h4,.zone-paper strong{color:var(--on-paper-1)}
.zone-paper .prose{color:#22323F}
.zone-paper .eyebrow,.zone-paper .mono,.zone-paper .footer-col__title{color:var(--brass-ink)}
.zone-paper .rule,.zone-paper .section-head{border-color:rgba(10,22,34,0.16)}
.zone-paper .rule{background-color:rgba(10,22,34,0.16)}
.zone-paper a:not(.btn){color:var(--brass-ink);border-bottom:1px solid rgba(138,90,18,0.35)}
.zone-paper a:not(.btn):hover{color:var(--on-paper-1);border-bottom-color:var(--amber)}
.zone-paper .media{border-color:rgba(10,22,34,0.18);background-color:#E4DED2}
.zone-paper .panel{background-color:#EFE9DC;border-color:rgba(10,22,34,0.16)}

/* 9. 动效 ------------------------------------------------- */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity 0.6s ease,transform 0.6s ease;
}
[data-reveal].is-in{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:0.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
}

/* 10. 响应式 ---------------------------------------------- */
@media (max-width:1024px){
  :root{--space-section:64px}
  html{scroll-padding-top:96px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    max-height:72vh;
    overflow-y:auto;
    background-color:var(--ink-900);
    border-bottom:1px solid var(--line);
    box-shadow:0 18px 40px rgba(3,8,14,0.65);
  }
  .site-header[data-open] .site-nav{display:block}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;padding-block:8px 16px}
  .site-nav__item{border-bottom:1px solid var(--line)}
  .site-nav__link{
    padding:15px 24px;
    font-family:var(--font-display);
    font-size:17px;
    font-weight:700;
  }
  .site-nav__link::before{
    left:0;
    top:0;
    width:3px;
    height:0;
    transform:none;
  }
  .site-nav__link:hover::before,
  .site-nav__link[aria-current="page"]::before{height:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
}

@media (max-width:900px){
  .grid--thirds,.grid--halves{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:640px){
  :root{--gutter:20px;--space-section:56px}
  body{font-size:16px;line-height:1.7}
  .header-rail__note{display:none}
  .header-rail__links{width:100%;justify-content:flex-start;gap:20px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-block:56px 36px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .footer-base{flex-direction:column;align-items:flex-start;gap:10px}
  .grid--thirds,.grid--halves{grid-template-columns:1fr}
  .prose{font-size:17px}
  .tab{padding:11px 14px;font-size:14px}
}