/* ============================================================
   乐盈登录口 · 共享样式表  /assets/site.css
   语言：蓝阶近单色 + 单一活力橙，锐利直角、1px 精密网格
   ============================================================ */

:root{
  /* 色板 */
  --c-blue:#0066CC;
  --c-blue-deep:#00458F;
  --c-blue-dark:#002A57;
  --c-ink:#0B1620;
  --c-orange:#FF6600;
  --c-orange-soft:#FF9040;
  --c-mist:#E4EDF5;
  --c-silver:#C7D0D9;
  --c-graphite:#3A4652;
  --c-paper:#F5F8FB;

  --line:rgba(58,70,82,.22);
  --line-soft:rgba(58,70,82,.12);
  --line-strong:rgba(11,22,32,.55);
  --line-invert:rgba(199,208,217,.28);

  /* 字体 */
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-head:var(--font-sans);
  --font-body:var(--font-sans);
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  /* 字阶 */
  --fs-hero:clamp(46px,9vw,132px);
  --fs-display:clamp(32px,4.4vw,58px);
  --fs-title:clamp(22px,2.3vw,30px);
  --fs-lead:clamp(16px,1.2vw,19px);
  --fs-body:16px;
  --fs-note:13.5px;
  --fs-tag:11.5px;

  /* 度量 */
  --gutter:clamp(18px,4.4vw,60px);
  --maxw:1320px;
  --gap:clamp(16px,2vw,28px);
  --header-h:76px;
}

/* ---------------- reset ---------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100%;
  background:var(--c-paper);
  color:var(--c-ink);
  font-family:var(--font-body);
  font-size:var(--fs-body);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
dl,dd,dt{margin:0}
h1,h2,h3,h4,h5{margin:0;font-family:var(--font-head);font-weight:800;letter-spacing:-.03em;line-height:1.08}
p{margin:0}
p + p{margin-top:1em}
hr{margin:0;border:0}
:focus-visible{outline:2px solid var(--c-orange);outline-offset:3px}
::selection{background:var(--c-orange);color:var(--c-ink)}

.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}

/* ---------------- 布局骨架 ---------------- */
.shell{
  width:min(100% - (var(--gutter) * 2), var(--maxw));
  margin-inline:auto;
}
.section{padding-block:clamp(48px,7vw,110px)}
.section--tight{padding-block:clamp(28px,4vw,64px)}
.section-head{display:grid;gap:14px;max-width:68ch;margin-bottom:clamp(24px,3vw,48px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:var(--fs-tag);font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--c-blue);
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--c-orange)}
.section-title{font-size:var(--fs-display);line-height:1.02}
.lede{font-size:var(--fs-lead);color:var(--c-graphite);max-width:62ch}
.rule{height:1px;background:var(--line);border:0;margin:0}
.note{font-size:var(--fs-note);line-height:1.8;color:var(--c-graphite);max-width:60ch}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.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}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;border:1px solid var(--line-strong);
  background:transparent;color:var(--c-ink);
  font-family:var(--font-body);font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.btn::after{content:"";width:14px;height:2px;background:currentColor;transition:width .2s ease}
.btn:hover::after{width:24px}
.btn--primary{background:var(--c-blue);border-color:var(--c-blue);color:#fff}
.btn--primary:hover{background:var(--c-blue-deep);border-color:var(--c-blue-deep)}
.btn--accent{background:var(--c-orange);border-color:var(--c-orange);color:var(--c-ink)}
.btn--accent:hover{background:var(--c-orange-soft);border-color:var(--c-orange-soft)}
.btn--ghost{border-color:var(--line-invert);color:#EAF1F8}
.btn--ghost:hover{background:rgba(255,255,255,.08)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(18px,2.2vw,30px)}

/* ---------------- 卡片与数据 ---------------- */
.card{
  position:relative;background:var(--c-paper);
  border:1px solid var(--line);padding:clamp(18px,2vw,28px);
}
.card--mist{background:var(--c-mist)}
.card--dark{background:var(--c-blue-dark);color:#D8E5F2;border-color:var(--line-invert)}
.card-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:14px}
.card-title{font-size:var(--fs-title);line-height:1.2}
.card-body{max-width:68ch}
.card-foot{margin-top:18px;padding-top:14px;border-top:1px solid var(--line-soft)}

.stat-row{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(158px,1fr));
  gap:1px;background:var(--line);border:1px solid var(--line);
}
.stat{background:var(--c-paper);padding:clamp(16px,1.8vw,24px)}
.stat-num{
  font-family:var(--font-mono);font-weight:600;font-size:clamp(26px,3vw,40px);
  line-height:1;letter-spacing:-.02em;color:var(--c-blue-deep);
}
.stat-num em{font-style:normal;color:var(--c-orange)}
.stat-label{margin-top:10px;font-size:var(--fs-note);color:var(--c-graphite);line-height:1.6}

/* ---------------- 标签与筛选 ---------------- */
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;
  font-family:var(--font-mono);font-size:var(--fs-tag);font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:var(--c-graphite);
  border:1px solid var(--line-strong);
}
.tag--accent{border-color:var(--c-orange);background:rgba(255,102,0,.1);color:var(--c-ink)}

.filter-row{display:flex;flex-wrap:wrap;gap:8px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.chip{
  padding:8px 14px;border:1px solid var(--line);background:var(--c-paper);
  font-size:var(--fs-note);color:var(--c-graphite);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.chip:hover{border-color:var(--c-blue);color:var(--c-blue)}
.chip[aria-pressed="true"]{background:var(--c-blue);border-color:var(--c-blue);color:#fff}

/* ---------------- 可展开面板 ---------------- */
.panel{border-top:1px solid var(--line-strong)}
.panel-item{border-bottom:1px solid var(--line)}
.panel-item[data-open]{background:var(--c-mist)}
.panel-trigger{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  width:100%;padding:20px 4px;text-align:left;
  transition:color .2s ease;
}
.panel-trigger:hover{color:var(--c-blue)}
.panel-index{
  flex:0 0 auto;font-family:var(--font-mono);font-weight:600;
  font-size:13px;letter-spacing:.08em;color:var(--c-graphite);
}
.panel-item[data-open] .panel-index{color:var(--c-orange)}
.panel-title{flex:1 1 auto;font-family:var(--font-head);font-weight:800;font-size:var(--fs-title);letter-spacing:-.02em;line-height:1.28}
.panel-sign{position:relative;flex:0 0 auto;width:16px;height:16px}
.panel-sign::before,.panel-sign::after{content:"";position:absolute;background:var(--c-blue)}
.panel-sign::before{left:0;top:7px;width:16px;height:2px}
.panel-sign::after{left:7px;top:0;width:2px;height:16px;transition:transform .25s ease,opacity .25s ease}
.panel-item[data-open] .panel-sign::after{transform:scaleY(0);opacity:0}
.panel-body{max-height:0;overflow:hidden;opacity:0;transition:max-height .34s ease,opacity .28s ease}
.panel-item[data-open] .panel-body{max-height:960px;opacity:1}
.panel-body-inner{padding:0 4px 26px clamp(28px,5vw,76px);max-width:68ch;color:var(--c-graphite)}

/* ---------------- 图片容器 ---------------- */
.media{
  position:relative;display:block;width:100%;overflow:hidden;
  background-color:var(--c-mist);border:1px solid var(--line);
  background-image:repeating-linear-gradient(135deg,transparent 0 11px,rgba(0,102,204,.09) 11px 12px);
}
.media img{width:100%;height:100%;object-fit:cover}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--wide{aspect-ratio:21/9}
.media-cap{margin-top:10px;font-size:var(--fs-note);color:var(--c-graphite);line-height:1.7}

/* ---------------- 面包屑 ---------------- */
.breadcrumb{padding-top:20px;font-size:var(--fs-note)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px;color:var(--c-graphite)}
.breadcrumb li + li::before{content:"/";font-family:var(--font-mono);color:var(--c-silver)}
.breadcrumb a{color:var(--c-graphite);border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease}
.breadcrumb a:hover{color:var(--c-blue);border-bottom-color:var(--c-blue)}
.breadcrumb [aria-current="page"]{color:var(--c-ink);font-weight:600}

/* ---------------- 跳转与显现 ---------------- */
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  padding:12px 18px;background:var(--c-orange);color:var(--c-ink);
  font-weight:700;font-size:14px;transition:top .2s ease;
}
.skip-link:focus{top:12px}

.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
.reveal.is-visible{opacity:1;transform:none}

.to-top{
  position:fixed;right:clamp(14px,2vw,28px);bottom:clamp(14px,2vw,28px);z-index:70;
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;background:var(--c-blue-dark);color:#fff;
  border:1px solid var(--line-invert);opacity:0;pointer-events:none;
  transition:opacity .25s ease,background .2s ease;
}
.to-top[data-visible]{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--c-blue)}
.to-top::before{
  content:"";width:10px;height:10px;
  border-top:2px solid var(--c-orange);border-left:2px solid var(--c-orange);
  transform:translateY(3px) rotate(45deg);
}

/* ============================================================
   页头：端部分置 + 斜切色块 + 滚动进度
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--c-blue-dark);
  color:#EAF1F8;
  border-bottom:1px solid var(--line-invert);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:calc(100% / 12) 100%;
}
.site-header::after{
  content:"";position:absolute;top:0;right:0;height:100%;width:min(46%,520px);
  background:linear-gradient(180deg,rgba(0,102,204,.72),rgba(0,69,143,.12));
  clip-path:polygon(26% 0,100% 0,100% 100%,0 100%);
  pointer-events:none;
}
.site-header[data-scrolled="true"]{
  background:rgba(0,42,87,.96);
  box-shadow:0 1px 0 rgba(199,208,217,.24);
}

.scroll-progress{
  position:absolute;left:0;bottom:-1px;z-index:3;
  width:100%;height:2px;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--c-blue),var(--c-orange));
}

.header-inner{
  position:relative;z-index:2;
  width:min(100% - (var(--gutter) * 2), var(--maxw));
  margin-inline:auto;
  min-height:var(--header-h);
  display:flex;align-items:center;
  gap:clamp(16px,3vw,48px);
  padding-block:14px;
}
.site-header[data-scrolled="true"] .header-inner{min-height:62px;padding-block:8px}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{display:grid;grid-template-columns:repeat(3,6px);gap:3px;align-items:end;height:34px;width:24px}
.brand-mark i{display:block;width:6px;background:var(--c-blue)}
.brand-mark i:nth-child(1){height:58%;background:var(--c-orange)}
.brand-mark i:nth-child(2){height:82%;background:#2E86E0}
.brand-mark i:nth-child(3){height:100%;background:var(--c-blue-deep)}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-cn{font-family:var(--font-head);font-weight:800;font-size:20px;letter-spacing:.02em;color:#fff}
.brand-en{margin-top:6px;font-family:var(--font-mono);font-size:9.5px;font-weight:600;letter-spacing:.2em;color:var(--c-silver)}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:9px 12px;border:1px solid var(--line-invert);color:#EAF1F8;
}
.nav-toggle-label{font-size:13px;letter-spacing:.08em}
.nav-toggle-bars{display:grid;gap:4px;width:18px}
.nav-toggle-bars i{display:block;height:2px;background:var(--c-orange);transition:transform .25s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child{transform:translateY(3px) scaleX(.7)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child{transform:translateY(-3px)}

.site-nav{flex:1 1 auto;display:flex;align-items:center;gap:clamp(12px,2vw,32px)}
.nav-group{display:flex;align-items:center;gap:clamp(10px,1.7vw,26px)}
.nav-group--right{margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:8px 2px;
  font-size:15px;color:#CFE0F0;white-space:nowrap;
  transition:color .2s ease;
}
.nav-link:hover{color:#fff}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:2px;width:0;height:2px;
  background:var(--c-orange);transition:width .22s ease;
}
.nav-link:hover::after{width:100%}
.nav-link[aria-current="page"]{color:#fff;font-weight:600}
.nav-link[aria-current="page"]::after{width:100%}

.nav-utility{flex:0 0 auto;display:flex;align-items:center;gap:10px}
.nav-utility-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border:1px solid var(--line-invert);
  font-size:13.5px;color:#EAF1F8;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.nav-utility-link::before{content:"";width:6px;height:6px;background:var(--c-orange)}
.nav-utility-link:hover{background:var(--c-blue);border-color:var(--c-blue);color:#fff}

/* ============================================================
   页脚：夜航蓝深色分区
   ============================================================ */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(60px,8vw,130px);
  background:var(--c-blue-dark);color:#BCCEDF;
  border-top:1px solid var(--line-invert);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;width:min(40%,480px);height:3px;
  background:var(--c-orange);
}
.site-footer::after{
  content:"";position:absolute;top:0;right:0;width:min(54%,760px);height:100%;
  background:linear-gradient(180deg,rgba(0,102,204,.3),rgba(0,69,143,0));
  clip-path:polygon(24% 0,100% 0,100% 100%,0 100%);
  pointer-events:none;
}
.footer-top{
  position:relative;z-index:1;
  display:grid;
  grid-template-columns:minmax(240px,1.05fr) minmax(0,1.7fr) minmax(220px,.95fr);
  gap:clamp(28px,4vw,64px);
  padding-block:clamp(44px,6vw,84px);
}
.footer-brand{display:grid;gap:16px;align-content:start}
.footer-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:46px;height:46px;border:1px solid var(--line-invert);
  font-family:var(--font-mono);font-weight:600;font-size:15px;
  letter-spacing:.06em;color:var(--c-orange);
}
.footer-name{font-family:var(--font-head);font-weight:800;font-size:22px;line-height:1.2;letter-spacing:-.01em;color:#fff}
.footer-note{font-size:var(--fs-note);line-height:1.8;color:#9FB6CC;max-width:36ch}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,2.4vw,36px)}
.footer-col{min-width:0}
.footer-col-title{
  margin-bottom:16px;padding-bottom:12px;
  border-bottom:1px solid var(--line-invert);
  font-family:var(--font-mono);font-size:var(--fs-tag);font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:#fff;
}
.footer-links{display:grid;gap:11px}
.footer-links a{
  font-size:15px;color:#BCCEDF;
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer-links a:hover{color:#fff;border-bottom-color:var(--c-orange)}
.footer-contact{display:grid;gap:16px;align-content:start}
.footer-list{display:grid;gap:12px}
.footer-list dt{
  font-family:var(--font-mono);font-size:var(--fs-tag);font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:#7F99B3;
}
.footer-list dd{margin-top:5px;font-size:15px;line-height:1.7;color:#DCE8F4}
.footer-value{font-family:var(--font-mono);font-weight:600;font-size:15px;letter-spacing:.02em;color:#fff}
.footer-bottom{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:16px 28px;
  padding-block:22px;border-top:1px solid var(--line-invert);
  font-size:var(--fs-note);
}
.footer-copy{color:#8CA5BC}
.footer-legal-links{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal-links a{color:#BCCEDF;transition:color .2s ease}
.footer-legal-links a:hover{color:var(--c-orange)}
.footer-icp{font-family:var(--font-mono);letter-spacing:.02em;color:#7F99B3}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1000px){
  .span-3,.span-4,.span-5{grid-column:span 6}
  .span-7,.span-8{grid-column:span 12}
  .footer-top{grid-template-columns:1fr 1fr}
  .footer-contact{grid-column:1 / -1}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;left:calc(var(--gutter) * -1);right:calc(var(--gutter) * -1);top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--c-blue-dark);
    border-top:1px solid var(--line-invert);
    max-height:0;overflow:hidden;visibility:hidden;
    transition:max-height .32s ease,visibility .32s ease;
  }
  .site-nav[data-open]{max-height:min(78vh,620px);overflow-y:auto;visibility:visible}
  .nav-group{flex-direction:column;align-items:stretch;gap:0}
  .nav-group--right{margin-left:0}
  .nav-group--left{padding-top:6px}
  .nav-link{display:block;padding:14px 20px;border-bottom:1px solid rgba(199,208,217,.14);font-size:16px}
  .nav-link::after{left:20px;bottom:10px;width:0}
  .nav-link:hover::after{width:26px}
  .nav-link[aria-current="page"]::after{width:26px}
  .nav-utility{padding:18px 20px 24px;border-top:1px solid var(--line-invert)}
  .nav-utility-link{width:100%;justify-content:center}
}

@media (max-width:640px){
  .grid > *{grid-column:span 12}
  .footer-top{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr 1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .media--tall{aspect-ratio:4/5}
  :root{--header-h:66px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
}