/* ============================================================
   速博网登录 · 共享样式 /assets/site.css
   语汇：左右分屏 · 切角面板 · 经幡飘带 · 高原线条
   ============================================================ */

:root{
  --sky:#0A6EBD;
  --sky-lift:#1287DC;
  --saffron:#C8102E;
  --ink:#0B2436;
  --ink-soft:#33475A;
  --mist:#F5F8FB;
  --glacier:#7FC8E8;
  --line:#C7D9E8;
  --green:#1C8C5A;
  --gold:#E8A317;
  --gold-deep:#A06F06;
  --rock:#6B7A8A;
  --white:#FFFFFF;

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

  --maxw:1240px;
  --cut:16px;
  --header-h:74px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-soft:0 22px 44px -30px rgba(11,36,54,.55);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  color:var(--ink);
  background:var(--mist);
  overflow-x:hidden;
}
img,svg,video{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,h5{
  margin:0 0 .5em;
  font-weight:900;
  line-height:1.15;
  letter-spacing:-.02em;
  color:var(--ink);
}
h1{font-size:clamp(34px,4.6vw,56px)}
h2{font-size:clamp(26px,3vw,40px)}
h3{font-size:clamp(20px,2vw,28px)}
h4{font-size:clamp(18px,1.6vw,20px)}
p{margin:0 0 1em;max-width:34em}
a{color:var(--sky)}
button{font:inherit;color:inherit;background:none;border:0}
[hidden]{display:none !important}
::selection{background:var(--saffron);color:#fff}
:focus-visible{outline:2px solid var(--saffron);outline-offset:3px}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px)}

/* ---------- 容器与节奏 ---------- */
.shell{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.section{padding:clamp(34px,5.5vw,70px) 0}
.section--quiet{padding:clamp(56px,10vw,124px) 0}
main{display:block}

.split{
  display:grid;
  grid-template-columns:38fr 62fr;
  gap:clamp(24px,4vw,56px);
  align-items:start;
}
.split--flip{grid-template-columns:62fr 38fr}
.split--even{grid-template-columns:45fr 55fr}
.rail{position:sticky;top:calc(var(--header-h) + 28px)}

.grid{display:grid;gap:clamp(16px,2.2vw,26px)}
.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))}

/* ---------- 文本元素 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--mono);
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--sky);
}
.eyebrow::before{
  content:"";
  width:28px;height:2px;
  background:linear-gradient(90deg,var(--saffron),var(--gold));
}
.lede{font-size:clamp(17px,1.5vw,19px);color:var(--ink-soft);max-width:30em}
.mono{font-family:var(--mono);letter-spacing:.02em}
.index-num{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--gold-deep);min-width:36px}
.muted{color:var(--rock)}

.rule-diag{
  height:1px;border:0;margin:clamp(24px,4vw,48px) 0;
  background:linear-gradient(90deg,transparent,var(--line) 10%,var(--line) 90%,transparent);
  transform:rotate(-0.6deg);
  transform-origin:left center;
}

/* ---------- 面板 ---------- */
.panel{
  --cut:16px;
  position:relative;
  background:var(--white);
  padding:clamp(20px,2.6vw,32px);
  box-shadow:inset 0 0 0 1px var(--line);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.panel--marked{box-shadow:inset 0 0 0 2px var(--saffron)}
.panel--tint{background:linear-gradient(160deg,#FFFFFF 0%,#EEF6FC 100%)}
.panel--ink{background:linear-gradient(160deg,var(--ink) 0%,#08202F 100%);color:rgba(255,255,255,.82)}
.panel--ink h1,.panel--ink h2,.panel--ink h3,.panel--ink h4{color:#fff}
.panel-shell{filter:drop-shadow(0 26px 34px rgba(11,36,54,.16))}

/* ---------- 按钮 ---------- */
.btn{
  --cut:12px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  text-decoration:none;
  color:var(--ink);
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s ease,color .18s ease,box-shadow .18s ease;
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.btn-primary{
  background:linear-gradient(135deg,var(--sky) 0%,var(--ink) 100%);
  color:#fff;
}
.btn-primary:hover{background:linear-gradient(135deg,var(--sky-lift) 0%,var(--ink) 100%);transform:translateY(-1px)}
.btn-ghost{
  background:transparent;
  color:var(--ink);
  box-shadow:inset 0 0 0 1.5px var(--line);
}
.btn-ghost:hover{color:var(--saffron);box-shadow:inset 0 0 0 2px var(--saffron)}
.btn-mono{font-family:var(--mono);letter-spacing:.04em;font-size:13.5px}

/* ---------- 状态标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  background:rgba(28,140,90,.12);
  color:var(--green);
  clip-path:polygon(7px 0,100% 0,100% 100%,0 100%,0 7px);
}
.tag--sky{background:rgba(10,110,189,.12);color:var(--sky)}
.tag--gold{background:rgba(232,163,23,.18);color:var(--gold-deep)}
.tag--red{background:rgba(200,16,46,.12);color:var(--saffron)}

/* ---------- 图片容器 ---------- */
.media{
  --cut:18px;
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  background:linear-gradient(150deg,#E6F1F9 0%,#F5F8FB 60%,#EEF6FC 100%);
  box-shadow:inset 0 0 0 1px var(--line);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.media > img{width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media-caption{
  margin-top:10px;
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--rock);
  max-width:none;
}
.media-shell{filter:drop-shadow(0 24px 32px rgba(11,36,54,.18))}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0 8px;
  margin:0 0 clamp(18px,2.4vw,28px);
  padding:0;
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--rock);
}
.breadcrumb li{list-style:none}
.breadcrumb a{color:var(--rock);text-decoration:none}
.breadcrumb a:hover{color:var(--sky)}
.breadcrumb li + li::before{content:"/";margin-right:8px;color:var(--line)}

/* ---------- 索引列表 ---------- */
.index-list{margin:0;padding:0;display:grid}
.index-list li{list-style:none;border-top:1px solid var(--line)}
.index-list li:last-child{border-bottom:1px solid var(--line)}
.index-list a{
  display:flex;
  align-items:baseline;
  gap:16px;
  padding:14px 6px;
  color:var(--ink);
  text-decoration:none;
  transition:background-color .18s ease,color .18s ease,padding-left .18s ease;
}
.index-list a:hover,
.index-list a.is-active{background:rgba(10,110,189,.06);color:var(--sky);padding-left:12px}
[data-spy-link].is-active{color:var(--saffron)}

/* ---------- 标签页 ---------- */
.tabs{display:block}
.tablist{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
  margin-bottom:clamp(18px,2.6vw,28px);
}
.tab{
  --cut:10px;
  padding:11px 16px;
  font-family:var(--mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--rock);
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease;
  clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut));
}
.tab:hover{color:var(--sky);background:rgba(10,110,189,.07)}
.tab[aria-selected="true"]{background:var(--ink);color:#fff}
.tabpanel{animation:panelIn .18s ease both}
@keyframes panelIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- 折叠面板 ---------- */
.fold{
  --cut:14px;
  margin-bottom:10px;
  background:var(--white);
  box-shadow:inset 0 0 0 1px var(--line);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.fold summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 20px;
  font-weight:700;
  cursor:pointer;
  list-style:none;
}
.fold summary::-webkit-details-marker{display:none}
.fold summary::after{
  content:"+";
  font-family:var(--mono);
  font-size:18px;
  color:var(--saffron);
}
.fold[open] summary::after{content:"–"}
.fold[open] summary{box-shadow:inset 0 -1px 0 var(--line)}
.fold-body{padding:14px 20px 18px;color:var(--ink-soft)}
.fold-body p:last-child{margin-bottom:0}

/* ---------- 显现动画 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .5s ease,transform .5s var(--ease);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ============================================================
   页头
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(245,248,251,.94);
  -webkit-backdrop-filter:blur(12px) saturate(1.15);
  backdrop-filter:blur(12px) saturate(1.15);
  border-bottom:1px solid var(--line);
}
.flag-strip{
  height:4px;
  background:linear-gradient(90deg,
    var(--sky) 0 20%,var(--glacier) 20% 40%,var(--saffron) 40% 60%,
    var(--green) 60% 80%,var(--gold) 80% 100%);
}
.scroll-progress{
  position:fixed;
  top:0;left:0;right:0;
  height:3px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--sky),var(--glacier),var(--saffron),var(--gold));
  z-index:100;
  pointer-events:none;
}
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:120;
  padding:10px 18px;
  font-weight:800;
  color:#fff;
  background:var(--saffron);
  text-decoration:none;
  transition:top .18s ease;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
}
.skip-link:focus{top:8px}

.header-inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:11px clamp(16px,4vw,40px);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(16px,2.4vw,34px);
}

.brand-cluster{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--ink);
}
.brand-glyph{
  --cut:11px;
  flex:0 0 auto;
  width:42px;height:42px;
  display:grid;
  place-items:center;
  font-size:19px;
  font-weight:900;
  color:#fff;
  background:linear-gradient(150deg,var(--sky) 0%,var(--ink) 100%);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:17px;font-weight:900;letter-spacing:-.01em}
.brand-sub{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--rock);
}
.version-badge{
  --cut:8px;
  padding:3px 9px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--saffron);
  box-shadow:inset 0 0 0 2px var(--saffron);
  clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut));
  white-space:nowrap;
}

.site-nav{display:flex;align-items:center;gap:clamp(18px,3vw,38px)}
.nav-list{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,max-content));
  gap:2px 30px;
  margin:0;padding:0;
}
.nav-list li{list-style:none}
.nav-list a{
  position:relative;
  display:block;
  padding:6px 2px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-soft);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s ease;
}
.nav-list a::after{
  content:"";
  position:absolute;
  left:2px;right:2px;bottom:0;
  height:2px;
  background:var(--sky);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.nav-list a:hover{color:var(--sky)}
.nav-list a:hover::after{transform:scaleX(1)}
.nav-list a[aria-current="page"]{color:var(--saffron);font-weight:800}
.nav-list a[aria-current="page"]::after{background:var(--saffron);transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  font-size:14px;
  font-weight:700;
  cursor:pointer;
  background:var(--white);
  box-shadow:inset 0 0 0 1.5px var(--line);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.nav-toggle-bars{
  position:relative;
  width:18px;height:2px;
  background:var(--ink);
  transition:background-color .18s ease;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:var(--ink);
  transition:transform .22s var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

.nav-scrim{display:none}

@media (max-width:1160px){
  .nav-list{gap:2px 20px}
  .nav-actions{gap:8px}
  .btn{padding:9px 13px;font-size:14px}
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,100px);
  color:rgba(255,255,255,.76);
  background:linear-gradient(180deg,var(--ink) 0%,#08202F 100%);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(115deg,rgba(127,200,232,.10) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(65deg,rgba(232,163,23,.06) 0 1px,transparent 1px 72px);
}
.site-footer .brand-mark{color:#fff}
.site-footer .brand-name{color:#fff}
.site-footer .brand-sub{color:var(--glacier)}
.site-footer .brand-glyph{
  background:linear-gradient(150deg,var(--sky-lift) 0%,var(--sky) 100%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.28);
}
.footer-inner{
  position:relative;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(40px,6vw,68px) clamp(16px,4vw,40px) clamp(26px,4vw,40px);
  display:grid;
  grid-template-columns:minmax(230px,.9fr) 2.1fr;
  gap:clamp(28px,5vw,64px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.footer-tagline{
  margin:0;
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--glacier);
  max-width:none;
}
.footer-contact-line{
  margin:0;
  font-size:14.5px;
  line-height:1.6;
  color:rgba(255,255,255,.68);
  max-width:26em;
}
.footer-nav{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:26px 20px;
}
.footer-col-title{
  margin:0 0 14px;
  padding-bottom:9px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--glacier);
  box-shadow:inset 0 -1px 0 rgba(199,217,232,.24);
}
.footer-list{margin:0;padding:0;display:grid;gap:2px}
.footer-list li{list-style:none}
.footer-list a{
  display:inline-block;
  padding:5px 0;
  font-size:14.5px;
  color:rgba(255,255,255,.72);
  text-decoration:none;
  transition:color .18s ease,transform .18s var(--ease);
}
.footer-list a:hover{color:#fff;transform:translateX(3px)}
.footer-base{
  position:relative;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:18px clamp(16px,4vw,40px) clamp(28px,4vw,44px);
  border-top:1px solid rgba(199,217,232,.2);
  display:flex;
  flex-wrap:wrap;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px 28px;
}
.footer-service{
  margin:0;
  font-size:13px;
  line-height:1.7;
  color:rgba(255,255,255,.55);
  max-width:52em;
}
.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  margin:0;
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:rgba(255,255,255,.6);
}
.footer-legal{padding-left:10px;box-shadow:inset 2px 0 0 var(--saffron)}
.footer-copy{max-width:none}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:980px){
  :root{--header-h:68px}

  .nav-toggle{display:inline-flex}

  .site-nav{
    position:fixed;
    top:0;left:0;bottom:0;
    width:min(84vw,340px);
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:26px;
    padding:92px 24px 34px;
    background:linear-gradient(180deg,var(--ink) 0%,#0A5A9B 130%);
    transform:translateX(-104%);
    transition:transform .3s var(--ease);
    z-index:90;
    overflow-y:auto;
    box-shadow:26px 0 60px -30px rgba(11,36,54,.9);
  }
  .site-nav[data-open]{transform:translateX(0)}
  .nav-list{grid-template-columns:1fr;gap:2px}
  .nav-list a{
    padding:12px 12px;
    font-size:17px;
    color:rgba(255,255,255,.82);
  }
  .nav-list a::after{display:none}
  .nav-list a:hover{color:#fff;background:rgba(255,255,255,.08)}
  .nav-list a[aria-current="page"]{
    color:#fff;
    background:rgba(200,16,46,.26);
    box-shadow:inset 3px 0 0 var(--saffron);
  }
  .nav-actions{flex-direction:column;align-items:stretch;gap:10px}
  .nav-actions .btn{padding:13px 18px;font-size:15px}
  .btn-ghost{color:#fff;box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.4)}
  .btn-ghost:hover{color:#fff;box-shadow:inset 0 0 0 2px var(--glacier)}

  .nav-scrim:not([hidden]){display:block;position:fixed;inset:0;z-index:85;background:rgba(11,36,54,.58)}
  body.nav-open{overflow:hidden}

  .split,.split--flip,.split--even{grid-template-columns:1fr}
  .rail{position:static;top:auto}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}

  .footer-inner{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:600px){
  body{font-size:16px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .brand-sub{display:none}
  .version-badge{font-size:11px;padding:2px 7px}
  .footer-nav{grid-template-columns:1fr;gap:22px}
  .footer-base{flex-direction:column}
}

/* ============================================================
   减少动态
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
  .btn:hover,
  .footer-list a:hover{transform:none}
}