/* ==========================================================================
   安信主页 · /assets/site.css
   共享外壳：reset、变量、中文排版、头部、页脚、按钮、面包屑、栅格、基础组件
   ========================================================================== */

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

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

:root{
  --navy:#0B1F3A;
  --navy-2:#14345C;
  --navy-3:#0A1B33;
  --orange:#FF6A2A;
  --orange-soft:#FFB38A;
  --line:#DDE3EA;
  --cyan:#8FDCD8;
  --paper:#F7F9FC;
  --ink:#0D1117;
  --gray:#667085;
  --green:#1F9D6A;

  --shell:1240px;
  --pad:clamp(18px,4vw,48px);
  --radius:2px;

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

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-1:0 1px 0 rgba(13,17,23,.04),0 12px 32px -28px rgba(11,31,58,.55);
}

img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.15;letter-spacing:-.01em}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

:focus-visible{outline:2px solid var(--orange);outline-offset:3px;border-radius:var(--radius)}
::selection{background:var(--orange);color:#170D06}

main{display:block}
#main-content{scroll-margin-top:96px}
#main-content:focus-visible{outline:2px solid var(--orange);outline-offset:-2px}

/* ---------- 排版与工具 ---------- */
.mono{
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:400;
  letter-spacing:.09em;
  line-height:1.4;
  font-variant-numeric:tabular-nums;
}

.display-title{
  font-size:clamp(3rem,7vw,6.5rem);
  font-weight:200;
  line-height:1.02;
  letter-spacing:-.035em;
}

.section-title{
  font-size:clamp(1.5rem,3vw,2.5rem);
  font-weight:700;
  line-height:1.12;
  letter-spacing:-.02em;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:400;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--orange);
}
.eyebrow::before{
  content:"";
  width:18px;
  height:1px;
  background:currentColor;
}

.lede{
  max-width:58ch;
  font-size:clamp(1rem,1.3vw,1.1rem);
  line-height:1.8;
  color:var(--gray);
}

.prose{max-width:72ch;font-size:1rem;line-height:1.85;color:var(--ink)}
.prose p + p{margin-top:1.1em}
.prose h2{font-size:clamp(1.25rem,2vw,1.6rem);margin-top:2.2em;margin-bottom:.6em}
.prose h3{font-size:1.1rem;margin-top:1.8em;margin-bottom:.5em}
.prose ul{list-style:none;margin:1em 0}
.prose ul li{position:relative;padding-left:1.4em;margin-bottom:.5em}
.prose ul li::before{content:"";position:absolute;left:0;top:.7em;width:8px;height:1px;background:var(--orange)}
.prose a{border-bottom:1px solid var(--orange-soft);color:var(--navy-2)}
.prose a:hover{border-color:var(--orange);color:var(--orange)}

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

.rule{height:1px;border:0;margin:0;background:var(--line)}

/* ---------- 布局骨架 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.section{padding-block:clamp(34px,5vw,72px)}
.section + .section{border-top:1px solid var(--line)}

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:14px 28px;
  margin-bottom:clamp(20px,3vw,36px);
}
.section-head > div{min-width:0}
.section-head .lede{margin-top:10px}

.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.split{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(18px,3vw,40px);align-items:start}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:200;
  transform:translateY(-220%);
  padding:10px 18px;
  background:var(--paper);
  color:var(--navy);
  border:1px solid var(--navy);
  border-radius:var(--radius);
  font-size:.85rem;
  font-weight:600;
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 头部 ---------- */
.site-header{
  position:relative;
  z-index:100;
  background:var(--navy);
  color:var(--paper);
  border-top:3px solid var(--orange);
  box-shadow:0 1px 0 rgba(141,220,216,.14);
  transition:box-shadow .22s var(--ease);
}
.site-header[data-scrolled]{box-shadow:0 18px 34px -26px rgba(4,12,24,.95)}
.site-header[data-nav-open] .nav-toggle{border-color:var(--orange);color:var(--orange-soft)}

.header-top{border-bottom:1px solid rgba(221,227,234,.14)}

.header-shell{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:74px;
  padding-block:14px;
}

.brand-group{display:flex;align-items:center;gap:14px;min-width:0}

.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}

.brand-mark{
  flex:none;
  display:grid;
  place-items:center;
  width:40px;height:40px;
  background:var(--orange);
  color:var(--navy);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand-mark-inner{font-size:1.1rem;font-weight:700;line-height:1;letter-spacing:0}

.brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand-name{font-size:1.16rem;font-weight:700;line-height:1.2;letter-spacing:.03em}
.brand-sub{font-size:.72rem;line-height:1.3;letter-spacing:.1em;color:rgba(247,249,252,.6);white-space:nowrap}

.version-chip{
  flex:none;
  padding:3px 9px;
  border:1px solid rgba(143,220,216,.5);
  border-radius:999px;
  color:var(--cyan);
  font-size:.66rem;
  letter-spacing:.1em;
}

.header-tools{display:flex;align-items:center;gap:10px;min-width:0}

.search-box{
  position:relative;
  display:flex;
  align-items:center;
  gap:9px;
  height:38px;
  padding-inline:11px;
  background:rgba(20,52,92,.55);
  border:1px solid rgba(221,227,234,.24);
  border-radius:var(--radius);
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.search-box:focus-within{border-color:var(--orange);background:rgba(20,52,92,.92)}
.search-label{flex:none;color:var(--cyan);font-size:.66rem;letter-spacing:.16em}
.search-input{
  width:184px;
  min-width:0;
  padding:0;
  border:0;
  background:transparent;
  color:var(--paper);
  font-size:.85rem;
  line-height:1.4;
}
.search-input::placeholder{color:rgba(247,249,252,.5)}
.search-input:focus-visible{outline:none}
.search-input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}

.search-status{
  position:absolute;
  left:0;
  top:calc(100% + 7px);
  font-size:.66rem;
  letter-spacing:.08em;
  color:var(--cyan);
  white-space:nowrap;
  pointer-events:none;
}
.search-status:empty{display:none}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:38px;
  padding:8px 16px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-size:.85rem;
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.25;
  white-space:nowrap;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn-accent{background:var(--orange);border-color:var(--orange);color:#170D06}
.btn-accent:hover{background:var(--orange-soft);border-color:var(--orange-soft);color:#170D06}
.btn-ink{background:var(--navy);border-color:var(--navy);color:var(--paper)}
.btn-ink:hover{background:var(--navy-2);border-color:var(--navy-2)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--navy)}
.btn-ghost:hover{border-color:var(--navy);color:var(--navy)}
.btn-quiet{background:transparent;border-color:rgba(247,249,252,.35);color:var(--paper)}
.btn-quiet:hover{border-color:var(--paper);color:var(--paper)}

/* 移动端栏目开关 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 12px;
  border:1px solid rgba(221,227,234,.3);
  border-radius:var(--radius);
  color:var(--paper);
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.06em;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle-bar{position:relative;width:16px;height:2px;background:currentColor;transition:background-color .2s var(--ease)}
.nav-toggle-bar::before,
.nav-toggle-bar::after{
  content:"";
  position:absolute;left:0;
  width:16px;height:2px;
  background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle-bar::before{top:-5px}
.nav-toggle-bar::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after{transform:translateY(-5px) rotate(-45deg)}

/* 索引轨 */
.nav-rail{
  background:var(--navy-3);
  border-top:1px solid rgba(143,220,216,.16);
}
.nav-rail-shell{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:22px;
  min-height:54px;
}
.nav-caption{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:.66rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:rgba(247,249,252,.48);
  white-space:nowrap;
}
.nav-caption-range{color:var(--cyan);letter-spacing:.12em}

.primary-nav{min-width:0}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:wrap;justify-content:flex-end}
.nav-item{display:flex}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-size:.92rem;
  font-weight:500;
  color:rgba(247,249,252,.82);
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.nav-link:hover{background:rgba(143,220,216,.1);border-color:rgba(143,220,216,.3);color:var(--paper)}
.nav-index{color:var(--orange);font-size:.64rem;letter-spacing:.05em}
.nav-link[aria-current="page"]{
  background:var(--paper);
  border-color:var(--paper);
  color:var(--navy);
  font-weight:700;
}
.nav-link[aria-current="page"] .nav-index{color:var(--navy-2)}
.nav-link[aria-current="page"]:hover{background:var(--paper);color:var(--navy)}

/* ---------- 面包屑 ---------- */
.crumbs{padding-block:14px 0}
.crumbs-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.06em;
  color:var(--gray);
}
.crumbs-list li{display:inline-flex;align-items:center;gap:8px}
.crumbs-list li + li::before{content:"/";color:var(--line)}
.crumbs-list a{color:var(--navy-2);border-bottom:1px solid transparent;padding-bottom:1px}
.crumbs-list a:hover{color:var(--orange);border-color:var(--orange)}
.crumbs-list [aria-current="page"]{color:var(--ink)}

/* ---------- 磁贴（三级） ---------- */
.tile{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:clamp(16px,2vw,24px);
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
a.tile:hover,
.tile:hover{transform:translateY(-4px);border-color:var(--navy-2);box-shadow:0 22px 44px -34px rgba(11,31,58,.85)}

.tile--primary{background:var(--navy);border-color:var(--navy);color:var(--paper)}
.tile--primary:hover{border-color:var(--cyan)}
.tile--accent{background:var(--orange-soft);border-color:var(--orange-soft);color:#2A1206}
.tile--accent:hover{border-color:var(--orange)}

.tile-index{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;color:var(--orange)}
.tile--primary .tile-index{color:var(--orange-soft)}
.tile--accent .tile-index{color:#6B2508}

.tile-title{font-size:1.1rem;font-weight:700;line-height:1.35}
.tile-desc{font-size:.9rem;line-height:1.75;color:var(--gray)}
.tile--primary .tile-desc{color:rgba(247,249,252,.76)}
.tile--accent .tile-desc{color:rgba(42,18,6,.78)}

.tile-meta{
  margin-top:auto;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.08em;
  color:var(--gray);
}
.tile--primary .tile-meta{color:rgba(247,249,252,.66)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:.64rem;
  letter-spacing:.08em;
  color:var(--navy-2);
}
.tag--accent{background:var(--orange-soft);border-color:var(--orange-soft);color:#3B1405}

.dot{flex:none;width:7px;height:7px;border-radius:50%;background:var(--green)}
.dot--cyan{background:var(--cyan)}

.status{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.08em;
  color:var(--gray);
}

/* ---------- 图片容器（供页面阶段放占位图） ---------- */
.figure{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:10px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1);
}
.figure-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border-radius:1px;
  background:var(--navy-2);
}
.figure-frame--wide{aspect-ratio:21 / 9}
.figure-frame--square{aspect-ratio:1 / 1}
.figure-frame img{width:100%;height:100%;object-fit:cover}
.figure-cap{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:6px 14px;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.08em;
  color:var(--gray);
}

/* ---------- 数据表 ---------- */
.data-table{font-size:.88rem}
.data-table th,
.data-table td{
  padding:12px 14px;
  text-align:left;
  vertical-align:top;
  border-bottom:1px solid var(--line);
}
.data-table thead th{
  font-family:var(--font-mono);
  font-size:.66rem;
  font-weight:400;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--gray);
  border-bottom:1px solid var(--navy);
  white-space:nowrap;
}
.data-table tbody tr:hover{background:rgba(143,220,216,.1)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:var(--navy);
  color:var(--paper);
}

.download-strip{background:var(--orange);color:#1B0F05}
.download-strip-shell{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:12px clamp(14px,2vw,26px);
  padding-block:15px;
}
.download-eyebrow{
  padding:4px 9px;
  background:#1B0F05;
  color:var(--orange-soft);
  border-radius:var(--radius);
  font-size:.64rem;
  letter-spacing:.18em;
  text-transform:uppercase;
}
.download-lead{font-size:.92rem;font-weight:700;line-height:1.4;max-width:36ch}
.download-facts{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:.78rem}
.download-facts li{display:inline-flex;align-items:baseline;gap:6px}
.download-facts .mono{font-size:.64rem;letter-spacing:.14em;color:rgba(27,15,5,.62)}
.download-strip .btn{margin-left:auto}

.footer-main{padding-block:clamp(30px,5vw,56px)}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr .8fr 1.35fr;
  gap:clamp(20px,3vw,40px);
  align-items:start;
}
.footer-brand-name{font-size:1.35rem;font-weight:700;letter-spacing:.03em}
.footer-brand-note{
  margin-top:10px;
  max-width:32ch;
  font-size:.86rem;
  line-height:1.8;
  color:rgba(247,249,252,.66);
}
.footer-version{margin-top:14px;font-size:.66rem;letter-spacing:.16em;color:var(--cyan)}

.footer-col-title{
  margin-bottom:12px;
  font-size:.64rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-list{display:flex;flex-direction:column;gap:9px;font-size:.88rem}
.footer-list a{
  display:inline-block;
  color:rgba(247,249,252,.8);
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list a:hover{color:var(--paper);border-color:var(--orange)}

.footer-contact .footer-list{gap:10px}
.footer-facts li{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-size:.84rem;
  line-height:1.7;
  color:rgba(247,249,252,.8);
}
.footer-facts .mono{flex:none;font-size:.64rem;letter-spacing:.14em;color:rgba(143,220,216,.85)}

.footer-base{border-top:1px solid rgba(221,227,234,.16)}
.footer-base-shell{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 24px;
  padding-block:16px 20px;
  font-size:.76rem;
  color:rgba(247,249,252,.58);
}
.footer-icp{font-size:.66rem;letter-spacing:.1em;color:rgba(247,249,252,.58)}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px;margin-left:auto}
.footer-legal a{color:rgba(247,249,252,.72);border-bottom:1px solid transparent;padding-bottom:1px}
.footer-legal a:hover{color:var(--paper);border-color:var(--orange)}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .header-cta{display:none}
  .search-input{width:150px}
  .nav-caption{display:none}
  .nav-list{justify-content:flex-end}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr;gap:24px}
  .footer-contact{grid-column:1 / -1}
}

@media (max-width:960px){
  .site-header{position:relative}
  .nav-toggle{display:inline-flex}
  .nav-rail-shell{
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    min-height:0;
  }
  .primary-nav{display:none;padding-block:8px 14px;border-top:1px solid rgba(143,220,216,.16)}
  .primary-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{display:block}
  .nav-link{
    width:100%;
    justify-content:flex-start;
    padding:13px 4px;
    border:0;
    border-bottom:1px solid rgba(221,227,234,.12);
    border-radius:0;
    font-size:1rem;
  }
  .nav-link:hover{background:rgba(143,220,216,.08);border-color:rgba(221,227,234,.12)}
  .nav-link[aria-current="page"]{
    background:rgba(247,249,252,.12);
    border-color:rgba(221,227,234,.12);
    color:var(--paper);
  }
  .nav-link[aria-current="page"] .nav-index{color:var(--orange)}
  .nav-link[aria-current="page"]:hover{background:rgba(247,249,252,.12);color:var(--paper)}
  .split{grid-template-columns:minmax(0,1fr)}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:820px){
  .header-shell{flex-wrap:wrap;row-gap:10px;padding-block:12px;min-height:0}
  .brand-group{flex:1 1 100%}
  .header-tools{flex:1 1 100%;justify-content:space-between}
  .search-box{flex:1 1 auto}
  .search-input{width:100%}
  .nav-toggle{flex:none}
  .download-lead{max-width:100%}
  .download-strip .btn{margin-left:0}
  .footer-base-shell{flex-direction:column;align-items:flex-start;gap:8px}
  .footer-legal{margin-left:0;gap:14px}
}

@media (max-width:640px){
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
  .display-title{font-size:clamp(2.4rem,11vw,3.4rem)}
  .brand-mark{width:34px;height:34px}
  .brand-name{font-size:1.05rem}
  .brand-sub{font-size:.66rem}
  .version-chip{font-size:.62rem;padding:2px 7px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-contact{grid-column:auto}
  .search-status{white-space:normal;max-width:70vw}
  .section-head{align-items:flex-start}
}

@media (min-width:961px){
  .site-header{position:sticky;top:0}
}

@media (prefers-reduced-motion: reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover,
  .tile:hover,
  a.tile:hover{transform:none}
  .skip-link{transition:none}
}