/* =========================================================
   鼎博登录 · 共享样式表  /assets/site.css
   复古数字档案系统：直角、细线、等宽编号、矿物色分层
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --indigo:#1B2A5B;
  --indigo-deep:#101B3C;
  --gold:#C9A227;
  --gold-soft:#EBD9A0;
  --coral:#E8663D;
  --moss:#4F6B52;
  --clay:#A9603F;
  --stone:#6B6F76;
  --cream:#F7F3EA;
  --paper:#FFFCF5;
  --ink:#14161A;

  --line:rgba(20,22,26,.14);
  --line-strong:rgba(20,22,26,.30);
  --line-invert:rgba(235,217,160,.26);
  --paper-84:rgba(255,252,245,.84);
  --paper-62:rgba(255,252,245,.62);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",Georgia,serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --w:1200px;
  --pad:24px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:.2s;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.nav-open{overflow:hidden}
main{display:block}
#main-content{scroll-margin-top:96px}
img,svg,video{max-width:100%;height:auto}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input{font:inherit;color:inherit;border-radius:0}
strong,b{font-weight:700}
hr{border:0;margin:0}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.15;
  letter-spacing:-.01em;
  margin:0 0 .6em;
  text-wrap:balance;
}
h1{font-size:clamp(38px,7vw,64px)}
h2{font-size:clamp(26px,4vw,40px)}
h3{font-size:clamp(20px,2.6vw,24px);font-weight:700;line-height:1.3}
h4{font-size:17px;font-weight:700;line-height:1.5}
.lede{font-size:clamp(18px,2.2vw,22px);line-height:1.7;color:var(--ink);max-width:38em}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;
  color:var(--clay);margin:0 0 14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;display:block}
.section--invert .eyebrow{color:var(--gold)}
.meta{font-family:var(--font-mono);font-size:13px;letter-spacing:.04em;color:var(--stone);margin:0}

/* ---------- 4. 无障碍工具类 ---------- */
.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;
}
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  background:var(--gold);color:var(--indigo-deep);
  padding:10px 18px;font-size:14px;font-weight:700;letter-spacing:.04em;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* ---------- 5. 布局容器 ---------- */
.wrap{width:100%;max-width:var(--w);margin:0 auto;padding:0 var(--pad)}
.wrap--narrow{max-width:760px}
.section{padding:64px 0}
.section--tight{padding:40px 0}
.section--loose{padding:88px 0}
.section--paper{background:var(--paper)}
.section--invert{background:var(--indigo-deep);color:var(--paper)}
.section--invert h1,.section--invert h2,.section--invert h3{color:var(--paper)}
.section--invert p{color:var(--paper-84)}
.rule{height:1px;background:var(--line)}
.rule--invert{background:var(--line-invert)}
.section-head{
  display:grid;gap:10px;grid-template-columns:minmax(0,1fr) auto;
  align-items:end;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:32px;
}
.section--invert .section-head{border-bottom-color:var(--line-invert)}
.section-head__meta{font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:var(--stone)}
.section--invert .section-head__meta{color:var(--gold-soft)}

/* ---------- 6. 栅格 ---------- */
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--gap-lg{gap:40px}

/* ---------- 7. 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 22px;font-size:15px;font-weight:700;letter-spacing:.02em;line-height:1.3;
  background:var(--indigo);color:var(--paper);border:1px solid transparent;
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),
             color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--coral{background:var(--coral);color:#fff}
.btn--gold{background:var(--gold);color:var(--indigo-deep)}
.btn--ghost{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn--ghost-invert{background:transparent;border-color:var(--line-invert);color:var(--paper)}
.btn--sm{padding:9px 14px;font-size:13px;letter-spacing:.08em}
.btn--block{width:100%}
.tag{
  display:inline-block;padding:5px 10px;font-size:12.5px;line-height:1.4;letter-spacing:.04em;
  border:1px solid var(--line-strong);color:var(--stone);background:transparent;
}
.tag--moss{background:var(--moss);border-color:var(--moss);color:var(--paper)}
.tag--clay{background:var(--clay);border-color:var(--clay);color:var(--paper)}
.tag--gold{background:var(--gold-soft);border-color:var(--gold-soft);color:var(--indigo-deep)}

/* ---------- 8. 卡片 / 统计 ---------- */
.card{
  display:block;background:var(--paper);border:1px solid var(--line);padding:24px;
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.card:hover,.card:focus-visible{border-color:var(--gold);transform:translateY(-2px)}
.card--flat{background:transparent}
.card__title{font-family:var(--font-display);font-weight:700;font-size:20px;margin:0 0 8px}
.card__text{font-size:15px;line-height:1.75;color:var(--stone);margin:0}
.section--invert .card{background:rgba(247,243,234,.05);border-color:var(--line-invert)}
.section--invert .card__text{color:var(--paper-62)}
.stat__num{font-family:var(--font-mono);font-weight:600;font-size:clamp(28px,4vw,40px);line-height:1;color:var(--indigo)}
.section--invert .stat__num{color:var(--gold)}
.stat__cap{display:block;font-size:13px;color:var(--stone);margin-top:8px}
.section--invert .stat__cap{color:var(--paper-62)}

/* ---------- 9. 图片容器基础规则 ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  background:var(--indigo-deep);border:1px solid var(--line);
}
.media > img,.media > svg,.media > video{
  display:block;width:100%;height:100%;object-fit:cover;
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--3x2{aspect-ratio:3/2}
.media--1x1{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--contain > img,.media--contain > svg{object-fit:contain;padding:8%}
.media--warm{background:linear-gradient(135deg,var(--indigo) 0%,var(--indigo-deep) 58%,var(--clay) 100%)}
.media--sand{background:linear-gradient(135deg,var(--gold-soft) 0%,var(--cream) 62%,var(--coral) 140%)}
.media--moss{background:linear-gradient(135deg,var(--moss) 0%,var(--indigo) 70%,var(--indigo-deep) 100%)}
.media--grid::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(235,217,160,.18) 1px,transparent 1px),
    linear-gradient(90deg,rgba(235,217,160,.18) 1px,transparent 1px);
  background-size:28px 28px;
}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;padding:10px 16px;
  background:linear-gradient(transparent,rgba(16,27,60,.88));
  color:var(--paper);font-size:12.5px;letter-spacing:.04em;
}

/* ---------- 10. 面包屑 ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:16px 0;font-family:var(--font-mono);font-size:13px;
  letter-spacing:.06em;color:var(--stone);
}
.breadcrumbs a{color:var(--stone);border-bottom:1px solid transparent;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.breadcrumbs a:hover{color:var(--ink);border-bottom-color:var(--gold)}
.breadcrumbs__sep{color:rgba(107,111,118,.7)}
.breadcrumbs [aria-current="page"]{color:var(--ink)}
.breadcrumbs--invert,.breadcrumbs--invert a,.breadcrumbs--invert [aria-current="page"]{color:var(--gold-soft)}
.breadcrumbs--invert .breadcrumbs__sep{color:rgba(235,217,160,.45)}

/* ---------- 11. 页头 ---------- */
.site-header{
  --header-surface:var(--indigo-deep);
  position:sticky;top:0;z-index:80;
  background:var(--header-surface);
  color:var(--paper);
  border-bottom:1px solid transparent;
  transition:background .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header[data-scrolled]{
  background:var(--indigo-deep);
  border-bottom-color:var(--gold);
  box-shadow:0 22px 48px -34px rgba(16,27,60,.95);
}
.site-header__inner{
  max-width:var(--w);margin:0 auto;padding:10px var(--pad) 0;
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 28px;
}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;color:inherit}
.brand__mark{
  display:grid;place-items:center;width:40px;height:40px;flex:0 0 auto;
  background:var(--gold);color:var(--indigo-deep);
  font-family:var(--font-display);font-weight:900;font-size:20px;line-height:1;
  border:1px solid rgba(16,27,60,.22);
}
.brand__text{display:flex;flex-direction:column;line-height:1.25}
.brand__name{font-family:var(--font-display);font-weight:900;font-size:19px;letter-spacing:.02em}
.brand__line{font-size:12px;letter-spacing:.06em;color:var(--gold-soft)}
.brand--footer .brand__name{font-size:20px}

/* 菜单按钮 */
.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:9px 12px;border:1px solid var(--line-invert);color:var(--paper);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:1.5px;background:var(--gold)}

/* 导航 */
.site-nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.site-nav__link{
  position:relative;display:block;padding:10px 12px;
  font-size:15px;font-weight:500;letter-spacing:.02em;color:var(--paper);
  transition:color var(--dur) var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.site-nav__link:hover{color:var(--gold-soft)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--gold)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__close{display:none}
.site-nav__note{
  display:none;margin:22px 0 0;font-family:var(--font-mono);
  font-size:12px;letter-spacing:.1em;color:var(--gold-soft);
}

/* 索引带 */
.site-header__tools{
  flex:1 1 100%;display:flex;align-items:center;flex-wrap:wrap;gap:12px 20px;
  padding:10px 0 12px;border-top:1px solid var(--line-invert);
  max-height:220px;
  transition:max-height .24s var(--ease),opacity .18s var(--ease),
             padding .24s var(--ease),border-color .24s var(--ease),
             visibility 0s linear 0s;
}
.site-header[data-scrolled] .site-header__tools{
  max-height:0;opacity:0;overflow:hidden;pointer-events:none;visibility:hidden;
  padding-top:0;padding-bottom:0;border-top-color:transparent;
  transition:max-height .24s var(--ease),opacity .18s var(--ease),
             padding .24s var(--ease),border-color .24s var(--ease),
             visibility 0s linear .24s;
}

/* 检索 */
.search{position:relative;flex:1 1 260px;min-width:200px;max-width:380px}
.search__icon{
  position:absolute;left:14px;top:50%;width:12px;height:12px;margin-top:-9px;
  border:1.5px solid var(--gold-soft);border-radius:50%;pointer-events:none;
}
.search__icon::after{
  content:"";position:absolute;right:-5px;bottom:-4px;width:6px;height:1.5px;
  background:var(--gold-soft);transform:rotate(45deg);
}
.search__input{
  width:100%;padding:10px 14px 10px 38px;
  background:rgba(247,243,234,.08);border:1px solid var(--line-invert);
  color:var(--paper);font-size:14px;line-height:1.5;appearance:none;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.search__input::placeholder{color:rgba(235,217,160,.6)}
.search__input:focus{outline:none;border-color:var(--gold);background:rgba(247,243,234,.15)}
.search__panel{
  position:absolute;left:0;right:0;top:calc(100% + 8px);z-index:8;
  background:var(--paper);border:1px solid var(--line-strong);color:var(--ink);
  box-shadow:0 26px 52px -26px rgba(16,27,60,.6);
  max-height:340px;overflow:auto;
}
.search__panel[hidden]{display:none}
.search__result{
  display:flex;align-items:baseline;gap:10px;
  padding:11px 14px;border-bottom:1px solid var(--line);
  transition:background var(--dur) var(--ease);
}
.search__list > li:last-child .search__result{border-bottom:0}
.search__result:hover,.search__result[data-active]{background:var(--gold-soft)}
.search__result-no{font-family:var(--font-mono);font-size:13px;color:var(--clay);flex:0 0 auto}
.search__result-name{font-weight:700;font-size:15px;line-height:1.5}
.search__result-desc{margin-left:auto;font-size:12.5px;color:var(--stone);white-space:nowrap}
.search__empty{padding:14px 16px;font-size:13px;color:var(--stone);margin:0}
.search__empty[hidden]{display:none}

/* 快捷栏目签 */
.quick-links{display:flex;flex-wrap:wrap;gap:8px;flex:0 1 auto}
.quick-links__item{
  display:inline-block;padding:7px 12px;font-size:13px;letter-spacing:.02em;
  color:var(--gold-soft);border:1px solid var(--line-invert);white-space:nowrap;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.quick-links__item:hover{background:var(--gold-soft);border-color:var(--gold-soft);color:var(--indigo-deep)}
.site-header__cta{margin-left:auto;white-space:nowrap}

/* 手机遮罩 */
.nav-scrim{
  position:fixed;inset:0;z-index:89;background:rgba(16,27,60,.6);
  opacity:0;pointer-events:none;
  transition:opacity .2s var(--ease);
}
.nav-scrim[data-open]{opacity:1;pointer-events:auto}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  background:var(--indigo-deep);color:var(--paper);
  border-top:3px solid var(--gold);
}
.site-footer__inner{
  max-width:var(--w);margin:0 auto;padding:56px var(--pad) 40px;
  display:grid;grid-template-columns:1.05fr 2fr;gap:40px 56px;
  border-bottom:1px solid var(--line-invert);
}
.site-footer__brand{max-width:380px}
.site-footer__tagline{margin:20px 0 0;font-size:14px;line-height:1.75;color:var(--paper-62)}
.site-footer__nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.footer-col__title{
  font-family:var(--font-mono);font-size:12px;font-weight:500;
  letter-spacing:.16em;color:var(--gold);margin:0 0 16px;line-height:1.6;
}
.footer-col__list li{margin-bottom:10px}
.footer-col__list a{
  font-size:15px;color:var(--paper-84);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-col__list a:hover{color:var(--gold);border-bottom-color:var(--gold)}

/* 倒计时组件 */
.countdown{
  margin-top:24px;padding:16px;border:1px solid var(--line-invert);
  background:rgba(247,243,234,.05);
}
.countdown__label{
  margin:0 0 10px;font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.16em;color:var(--gold);
}
.countdown__clock{
  display:flex;gap:12px;margin:0;font-family:var(--font-mono);
  font-size:23px;line-height:1;color:var(--paper);
}
.countdown__unit{display:flex;align-items:baseline;gap:3px}
.countdown__num{display:inline-block;min-width:2ch;text-align:center;font-weight:600}
.countdown__cap{font-size:11px;color:var(--paper-62)}
.countdown__meta{margin:12px 0 0;font-size:12.5px;color:var(--paper-62)}
.countdown__meta strong{font-family:var(--font-mono);color:var(--gold-soft);font-weight:600}
.countdown__note{
  max-height:0;overflow:hidden;opacity:0;margin:0;
  font-size:12.5px;line-height:1.7;color:var(--paper-62);
  transition:max-height .22s var(--ease),opacity .22s var(--ease),margin .22s var(--ease);
}
.countdown:hover .countdown__note,
.countdown:focus-within .countdown__note{max-height:120px;opacity:1;margin-top:10px}
.countdown__num[data-tick]{animation:tick .28s var(--ease)}
@keyframes tick{from{transform:translateY(-3px);opacity:.55}to{transform:none;opacity:1}}

.site-footer__legal{
  max-width:var(--w);margin:0 auto;padding:24px var(--pad) 40px;
  display:grid;gap:8px;font-size:13px;line-height:1.7;color:var(--paper-62);
}
.site-footer__legal p{margin:0}
.site-footer__service{color:var(--paper-84)}
.site-footer__icp{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:rgba(235,217,160,.72)}

/* ---------- 13. 动效 ---------- */
.reveal{opacity:1;transform:none}
[data-reveal-ready] .reveal{
  opacity:0;transform:translateY(14px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
[data-reveal-ready] .reveal[data-visible]{opacity:1;transform:none}
.num-pop{font-family:var(--font-mono);display:inline-block}
[data-visible] .num-pop{animation:numPop .4s var(--ease) both}
@keyframes numPop{
  0%{transform:translateY(7px);opacity:0}
  60%{transform:translateY(-2px);opacity:1}
  100%{transform:none;opacity:1}
}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1080px){
  .grid--gap-lg{gap:28px}
}

@media (max-width:960px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .site-footer__inner{grid-template-columns:1fr;gap:36px}
  .site-footer__brand{max-width:none}
}

@media (max-width:899px){
  .site-header__inner{gap:0}
  .nav-toggle{display:inline-flex}
  .site-header__tools{border-top-color:var(--line-invert)}
  .site-nav{
    position:fixed;top:0;right:0;bottom:0;z-index:90;
    width:min(86vw,340px);margin-left:0;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    padding:20px 24px 32px;
    background:var(--indigo-deep);
    border-left:1px solid var(--line-invert);
    box-shadow:-30px 0 60px -30px rgba(16,27,60,.85);
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .24s var(--ease);
  }
  .site-nav[data-open]{transform:translateX(0)}
  .site-nav__close{
    display:block;align-self:flex-end;padding:8px 12px;
    font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
    color:var(--gold);border:1px solid var(--line-invert);
  }
  .site-nav__close:hover{border-color:var(--gold)}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;margin-top:26px}
  .site-nav__item{border-bottom:1px solid rgba(235,217,160,.16)}
  .site-nav__link{padding:15px 2px;font-size:17px}
  .site-nav__link::after{display:none}
  .site-nav__link[aria-current="page"]{color:var(--gold);padding-left:12px}
  .site-nav__link[aria-current="page"]::before{
    content:"";position:absolute;left:0;top:50%;width:6px;height:6px;
    margin-top:-3px;background:var(--gold);
  }
  .site-nav__note{display:block}
}

@media (max-width:700px){
  :root{--pad:18px}
  .section{padding:48px 0}
  .section--loose{padding:60px 0}
  .section-head{grid-template-columns:1fr}
  .countdown__clock{font-size:20px;gap:9px}
  .search__result-desc{display:none}
  .site-footer__nav{gap:24px}
}

@media (max-width:640px){
  .site-header__cta{display:none}
  .search{flex:1 1 100%;max-width:none}
  .quick-links{
    width:100%;flex-wrap:nowrap;overflow-x:auto;
    padding-bottom:4px;scrollbar-width:none;
  }
  .quick-links::-webkit-scrollbar{display:none}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .grid--12{grid-template-columns:repeat(4,minmax(0,1fr))}
  .site-footer__nav{grid-template-columns:1fr 1fr;gap:24px 20px}
  .site-footer__inner{padding:40px var(--pad) 32px}
  .site-footer__legal{padding:20px var(--pad) 32px}
}

/* ---------- 15. 减弱动效 ---------- */
@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-ready] .reveal{opacity:1;transform:none;transition:none}
  [data-visible] .num-pop{animation:none}
  .countdown:hover .countdown__note,
  .countdown:focus-within .countdown__note{max-height:200px}
}