/* ============================================================
   博盈平台登录 · 共享站点样式  /assets/site.css
   高原寻路 · 经幡五色 · Bento 研究板
   ============================================================ */

/* ---------- 01 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;letter-spacing:inherit}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,h5,h6,p,ul,ol,dl,figure,blockquote,details{margin:0}
ul,ol{padding:0;list-style:none}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

/* ---------- 02 设计令牌 ---------- */
:root{
  /* 藏地经幡五色体系 */
  --indigo:#182A4A;
  --indigo-deep:#101C33;
  --indigo-soft:#22385C;
  --gold:#C7A15A;
  --gold-light:#DCBE84;
  --vermilion:#B3473A;
  --turquoise:#2E7D70;
  --cloud:#F7F3E8;
  --cream:#FBF7EE;
  --ink:#241F1A;
  --mist:#D8D1C2;
  --rock:#566A8C;
  --sand:#E9DABB;

  --font-head:'Noto Sans SC','Source Han Sans SC','Microsoft YaHei',sans-serif;
  --font-body:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'IBM Plex Mono','JetBrains Mono','SFMono-Regular',Consolas,monospace;

  --gutter:clamp(16px,4vw,48px);
  --wrap:1160px;
  --wrap-wide:1320px;
  --radius:2px;

  --shadow-1:0 1px 0 rgba(36,31,26,.05),0 6px 18px -14px rgba(24,42,74,.55);
  --shadow-2:0 1px 0 rgba(36,31,26,.06),0 16px 36px -22px rgba(24,42,74,.65);

  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 03 中文排版基线 ---------- */
body{
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.1;
  letter-spacing:.04em;
  color:var(--indigo);
  text-wrap:balance;
}
h1{font-size:clamp(2.2rem,5.2vw,4.1rem);line-height:1.06}
h2{font-size:clamp(1.5rem,2.8vw,2.35rem)}
h3{font-size:clamp(1.12rem,1.7vw,1.42rem);letter-spacing:.03em;line-height:1.3}
h4{font-size:1rem;letter-spacing:.06em;line-height:1.4}
p{max-width:68ch}
strong{font-weight:700;color:var(--indigo)}
small{font-size:.82em}

::selection{background:var(--gold);color:var(--indigo-deep)}

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

/* ---------- 04 布局容器 ---------- */
.wrap{
  width:min(var(--wrap),calc(100% - var(--gutter)*2));
  margin-inline:auto;
}
#main-content{scroll-margin-top:104px}

.section{padding-block:clamp(52px,7vw,104px)}
.section--tight{padding-block:clamp(32px,4vw,60px)}

.stack>*+*{margin-top:var(--stack,16px)}

.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(min(100%,210px),1fr))}

.rule{height:1px;background:var(--mist);border:0;margin-block:clamp(24px,4vw,44px)}

/* ---------- 05 文字工具 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11.5px;font-weight:700;letter-spacing:.22em;
  color:var(--rock);line-height:1.4;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--gold);flex:0 0 auto}

.lede{
  font-size:clamp(1rem,1.35vw,1.15rem);
  line-height:1.9;
  color:rgba(36,31,26,.84);
  max-width:62ch;
}

.mono{
  font-family:var(--font-mono);
  font-weight:600;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}

.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:700;font-size:14px;letter-spacing:.05em;
  color:var(--indigo);
  border-bottom:1px solid var(--mist);
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.link-arrow::after{
  content:"→";
  font-family:var(--font-mono);
  transition:transform .18s var(--ease);
}
.link-arrow:hover{color:var(--vermilion);border-color:var(--vermilion)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- 06 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;
  border-radius:var(--radius);
  border:1px solid transparent;
  font-family:var(--font-head);
  font-size:13.5px;font-weight:700;letter-spacing:.06em;line-height:1.2;
  white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn--gold{background:var(--gold);color:#1a1408;border-color:var(--gold)}
.btn--gold:hover{background:var(--gold-light);border-color:var(--gold-light)}
.btn--ghost{background:transparent;color:var(--cloud);border-color:rgba(247,243,232,.42)}
.btn--ghost:hover{color:var(--gold-light);border-color:var(--gold)}
.btn--ink{background:var(--indigo);color:var(--cloud);border-color:var(--indigo)}
.btn--ink:hover{background:var(--indigo-soft);border-color:var(--indigo-soft)}
.btn--line{background:transparent;color:var(--indigo);border-color:var(--mist)}
.btn--line:hover{border-color:var(--indigo);background:var(--sand)}

/* ---------- 07 跳转链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:50%;
  transform:translate(-50%,-220%);
  z-index:300;
  background:var(--gold);color:#1a1408;
  font-family:var(--font-head);
  font-size:13px;font-weight:700;letter-spacing:.06em;
  padding:10px 20px;border-radius:var(--radius);
  box-shadow:0 10px 24px -14px rgba(0,0,0,.6);
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0)}

/* ---------- 08 品牌标识 ---------- */
.brand{
  display:inline-flex;align-items:center;gap:11px;
  flex:0 0 auto;
  color:inherit;
}
.brand-seal{
  width:36px;height:36px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(155deg,var(--gold-light),var(--gold) 55%,#A9813C);
  color:var(--indigo-deep);
  font-family:var(--font-head);
  font-size:16px;font-weight:800;letter-spacing:0;line-height:1;
  border-radius:3px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.5),0 2px 6px -3px rgba(0,0,0,.7);
}
.brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand-name{
  font-family:var(--font-head);
  font-size:15px;font-weight:800;letter-spacing:.09em;line-height:1.1;
  color:var(--cloud);
}
.brand-sub{
  font-size:10.5px;font-weight:500;letter-spacing:.24em;line-height:1.1;
  color:rgba(247,243,232,.58);
}

/* ---------- 09 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--indigo);
  color:var(--cloud);
  box-shadow:0 1px 0 rgba(199,161,90,.38),0 10px 28px -24px rgba(0,0,0,.9);
}
.header-bar{
  display:flex;align-items:center;
  gap:clamp(10px,2vw,26px);
  width:min(var(--wrap-wide),calc(100% - var(--gutter)*2));
  margin-inline:auto;
  min-height:70px;
  padding-block:9px;
}

/* 命令栏导航 */
.command-nav{
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  -ms-overflow-style:none;
  border-left:1px solid rgba(247,243,232,.16);
  padding-left:clamp(10px,1.6vw,22px);
  -webkit-overflow-scrolling:touch;
}
.command-nav::-webkit-scrollbar{display:none;height:0}
.nav-list{display:flex;align-items:center;gap:clamp(2px,.9vw,12px)}
.nav-list>li{flex:0 0 auto}

.nav-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 11px;
  border-radius:var(--radius);
  border:1px solid transparent;
  font-size:13.5px;letter-spacing:.05em;line-height:1.3;
  color:rgba(247,243,232,.76);
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease),
             border-color .18s var(--ease);
}
.nav-link::before{
  content:"";
  width:6px;height:6px;flex:0 0 auto;
  border-radius:50%;
  background:transparent;
  box-shadow:inset 0 0 0 1px rgba(247,243,232,.38);
  transition:background-color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-idx{
  font-family:var(--font-mono);
  font-size:10px;font-weight:600;
  letter-spacing:.02em;
  color:rgba(199,161,90,.75);
}
.nav-link:hover{color:var(--cloud);background:rgba(247,243,232,.08)}
.nav-link[aria-current="page"]{
  color:#FFFFFF;
  background:rgba(46,125,112,.24);
  border-color:rgba(46,125,112,.78);
}
.nav-link[aria-current="page"]::before{
  background:var(--turquoise);
  box-shadow:0 0 0 3px rgba(46,125,112,.26);
}
.nav-link[aria-current="page"] .nav-idx{color:var(--gold-light)}

/* 页头行动区 */
.header-actions{
  display:flex;align-items:center;gap:10px;
  flex:0 0 auto;
  margin-left:auto;
}
.header-action-primary{padding:10px 16px;font-size:13px}
.header-action-secondary{padding:10px 15px;font-size:13px}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;gap:9px;
  padding:9px 13px;
  border:1px solid rgba(247,243,232,.35);
  border-radius:var(--radius);
  color:var(--cloud);
  font-size:12.5px;font-weight:700;letter-spacing:.1em;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold-light)}
.nav-toggle-mark{
  position:relative;
  display:inline-block;
  width:16px;height:2px;
  background:currentColor;
  transition:background-color .18s var(--ease);
}
.nav-toggle-mark::before,
.nav-toggle-mark::after{
  content:"";
  position:absolute;left:0;
  width:16px;height:2px;
  background:currentColor;
  transition:transform .22s var(--ease),top .22s var(--ease);
}
.nav-toggle-mark::before{top:-5px}
.nav-toggle-mark::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle-mark{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-mark::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-mark::after{top:0;transform:rotate(-45deg)}
.nav-toggle-label{line-height:1}

/* 滚动进度线 */
.header-progress{
  height:2px;
  background:rgba(247,243,232,.12);
  overflow:hidden;
}
.progress-fill{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--turquoise),var(--gold));
  transition:width .12s linear;
}

/* ---------- 10 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:var(--indigo-deep);
  color:var(--cloud);
  isolation:isolate;
}
.site-footer::before{
  content:"";
  position:absolute;inset:0 0 auto 0;
  height:180px;
  background-image:repeating-linear-gradient(118deg,
      rgba(199,161,90,.11) 0 1px,
      transparent 1px 24px);
  pointer-events:none;
  z-index:-1;
}
.flag-rule{
  height:5px;
  background:linear-gradient(90deg,
    var(--gold) 0 20%,
    var(--vermilion) 20% 40%,
    var(--turquoise) 40% 60%,
    var(--rock) 60% 80%,
    var(--sand) 80% 100%);
}

.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.55fr) repeat(3,minmax(0,1fr));
  gap:clamp(24px,3.2vw,48px);
  padding-block:clamp(40px,5vw,68px) clamp(28px,3vw,44px);
}

.footer-brand{display:flex;flex-direction:column;gap:16px}
.brand--footer .brand-name{font-size:16px}
.brand--footer .brand-sub{color:rgba(247,243,232,.55)}
.footer-summary{
  font-size:14.5px;line-height:1.85;
  color:rgba(247,243,232,.72);
  max-width:34ch;
}
.footer-note{
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.04em;
  color:rgba(199,161,90,.85);
  max-width:none;
}

.footer-col-title{
  font-family:var(--font-head);
  font-size:12px;font-weight:800;letter-spacing:.2em;
  color:var(--gold);
  margin-bottom:14px;
  line-height:1.4;
}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-links a{
  position:relative;
  display:inline-block;
  font-size:14px;letter-spacing:.04em;
  color:rgba(247,243,232,.74);
  padding-left:0;
  transition:color .18s var(--ease),padding-left .18s var(--ease);
}
.footer-links a::before{
  content:"";
  position:absolute;left:0;top:50%;
  width:0;height:1px;
  background:var(--gold);
  transition:width .18s var(--ease);
}
.footer-links a:hover{color:var(--gold-light);padding-left:14px}
.footer-links a:hover::before{width:10px}

.footer-meta{
  border-top:1px solid rgba(247,243,232,.16);
  padding-block:clamp(24px,3vw,36px);
}
.footer-contact{display:flex;flex-direction:column;gap:14px}
.footer-contact-list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px clamp(20px,3vw,40px);
}
.footer-contact-item{display:flex;flex-direction:column;gap:4px;min-width:0}
.footer-contact-label{
  font-size:11px;font-weight:700;letter-spacing:.18em;
  color:rgba(247,243,232,.5);
}
.footer-contact-value{
  font-family:var(--font-mono);
  font-size:13.5px;font-weight:600;letter-spacing:.02em;
  color:var(--cloud);
  word-break:break-word;
  line-height:1.6;
}
.footer-contact-note{
  font-size:13px;line-height:1.8;
  color:rgba(247,243,232,.58);
  max-width:72ch;
  padding-left:14px;
  border-left:2px solid rgba(199,161,90,.6);
}

.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 28px;
  border-top:1px solid rgba(247,243,232,.16);
  padding-block:18px 28px;
  font-size:12.5px;letter-spacing:.05em;
  color:rgba(247,243,232,.56);
}
.footer-base p{max-width:none}
.footer-base p:last-child{font-family:var(--font-mono);letter-spacing:.02em}

/* ---------- 11 面板 / Bento 基础块 ---------- */
.panel{
  position:relative;
  background:var(--cloud);
  border:1px solid var(--mist);
  border-radius:var(--radius);
  padding:clamp(18px,2.2vw,28px);
  box-shadow:var(--shadow-1);
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease);
  min-width:0;
}
.panel:hover{
  box-shadow:var(--shadow-2);
  border-color:var(--gold);
}
.panel--indigo{
  background:var(--indigo);
  border-color:rgba(199,161,90,.35);
  color:var(--cloud);
}
.panel--indigo .panel-title{color:var(--cloud)}
.panel--indigo .panel-body{color:rgba(247,243,232,.78)}
.panel--sand{background:var(--sand);border-color:#DCC9A4}
.panel--ink{background:var(--indigo-deep);border-color:rgba(199,161,90,.3);color:var(--cloud)}
.panel--ink .panel-title{color:var(--cloud)}
.panel--ink .panel-body{color:rgba(247,243,232,.76)}

.panel-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.panel-title{
  font-family:var(--font-head);
  font-size:clamp(1.02rem,1.4vw,1.2rem);
  font-weight:800;letter-spacing:.04em;line-height:1.35;
  color:var(--indigo);
}
.panel-body{
  margin-top:10px;
  font-size:14.5px;line-height:1.85;
  color:rgba(36,31,26,.82);
  max-width:56ch;
}

/* ---------- 12 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  border-radius:999px;
  border:1px solid var(--mist);
  background:var(--cream);
  font-size:11.5px;font-weight:700;letter-spacing:.08em;line-height:1.7;
  color:var(--rock);
  white-space:nowrap;
}
.tag--gold{background:rgba(199,161,90,.16);border-color:rgba(199,161,90,.6);color:#8A6B29}
.tag--vermilion{background:rgba(179,71,58,.12);border-color:rgba(179,71,58,.5);color:var(--vermilion)}
.tag--turquoise{background:rgba(46,125,112,.13);border-color:rgba(46,125,112,.5);color:var(--turquoise)}

/* ---------- 13 折叠块 ---------- */
.fold{border-top:1px solid var(--mist)}
.fold:last-of-type{border-bottom:1px solid var(--mist)}
.fold-head{
  cursor:pointer;
  list-style:none;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:16px 4px;
  font-family:var(--font-head);
  font-size:15.5px;font-weight:700;letter-spacing:.03em;line-height:1.5;
  color:var(--indigo);
  transition:color .18s var(--ease);
}
.fold-head::-webkit-details-marker{display:none}
.fold-head::after{
  content:"";
  flex:0 0 auto;
  width:9px;height:9px;
  margin-top:-4px;
  border-right:2px solid var(--gold);
  border-bottom:2px solid var(--gold);
  transform:rotate(45deg);
  transition:transform .2s var(--ease),margin .2s var(--ease);
}
.fold-head:hover{color:var(--vermilion)}
.fold[open]>.fold-head::after{transform:rotate(-135deg);margin-top:4px}
.fold-body{
  padding:0 4px 20px;
  font-size:14.5px;line-height:1.9;
  color:rgba(36,31,26,.84);
}
.fold-body>*+*{margin-top:10px}

/* ---------- 14 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:6px;
  font-size:12.5px;letter-spacing:.06em;line-height:1.8;
  color:var(--rock);
}
.crumb li{display:inline-flex;align-items:center;gap:6px;min-width:0}
.crumb li+li::before{
  content:"/";
  font-family:var(--font-mono);
  color:var(--mist);
}
.crumb a{color:var(--rock);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--vermilion)}
.crumb [aria-current="page"]{color:var(--indigo);font-weight:700}

/* ---------- 15 图片容器基础 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--mist);
  border-radius:var(--radius);
  background:
    linear-gradient(150deg,#EFE8D8 0%,#E4DBC6 55%,#DCD1B8 100%);
  aspect-ratio:16/10;
  isolation:isolate;
}
.media-frame::after{
  content:"";
  position:absolute;inset:0;
  background-image:repeating-linear-gradient(112deg,
      rgba(24,42,74,.09) 0 1px,
      transparent 1px 18px);
  pointer-events:none;
  z-index:1;
}
.media-frame>img{
  width:100%;height:100%;
  object-fit:cover;
  position:relative;
  z-index:2;
}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}

/* 正文链接 */
.prose{font-size:16px;line-height:1.95;color:rgba(36,31,26,.88)}
.prose>*+*{margin-top:1.05em}
.prose a{
  color:var(--indigo);
  text-decoration:underline;
  text-decoration-color:var(--gold);
  text-decoration-thickness:2px;
  text-underline-offset:3px;
  transition:color .18s var(--ease),text-decoration-color .18s var(--ease);
}
.prose a:hover{color:var(--vermilion);text-decoration-color:var(--vermilion)}

/* ---------- 16 响应式 · 平板 ---------- */
@media (max-width:1080px){
  .header-action-secondary{display:none}
}

@media (max-width:1000px){
  .footer-grid{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .footer-brand{
    grid-column:1/-1;
  }
  .footer-contact-list{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

/* ---------- 17 响应式 · 移动端头部 ---------- */
@media (max-width:1000px){
  .header-bar{min-height:62px;padding-block:8px;gap:12px}
  .nav-toggle{display:inline-flex}
  .header-actions{gap:8px}
  .header-action-primary{padding:9px 13px;font-size:12.5px}

  .command-nav{
    position:absolute;
    top:100%;left:0;right:0;
    flex:0 0 auto;
    padding:6px var(--gutter) 18px;
    background:var(--indigo-deep);
    border-left:0;
    border-top:1px solid rgba(199,161,90,.32);
    box-shadow:0 22px 40px -28px rgba(0,0,0,.9);
    max-height:0;
    opacity:0;
    visibility:hidden;
    overflow:hidden;
    transition:max-height .26s var(--ease),opacity .2s var(--ease),visibility .2s;
  }
  .command-nav[data-open="true"]{
    max-height:min(72vh,520px);
    overflow-y:auto;
    opacity:1;
    visibility:visible;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-list>li{width:100%}
  .nav-link{
    display:flex;
    width:100%;
    padding:13px 6px;
    font-size:15px;
    border-bottom:1px solid rgba(247,243,232,.1);
    border-radius:0;
    border-left:0;
    border-right:0;
    border-top:0;
  }
  .nav-link[aria-current="page"]{background:rgba(46,125,112,.18);border-bottom-color:rgba(46,125,112,.6)}
  .nav-idx{font-size:11px}
}

/* ---------- 18 响应式 · 手机 ---------- */
@media (max-width:720px){
  body{font-size:16px}
  .brand-seal{width:32px;height:32px;font-size:14px}
  .brand-name{font-size:14px}
  .brand-sub{letter-spacing:.18em;font-size:10px}

  .footer-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:26px 20px;
  }
  .footer-contact-list{grid-template-columns:1fr}
  .footer-summary{max-width:none}
  .footer-base{flex-direction:column;align-items:flex-start;gap:6px}
}

@media (max-width:480px){
  .header-action-primary{display:none}
  .footer-grid{grid-template-columns:1fr}
  .nav-toggle-label{display:none}
  .nav-toggle{padding:9px 11px}
  .lede{font-size:1rem}
}

/* ---------- 19 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .progress-fill{transition:none}
}