/* ============================================================
   易游中心 · 共享样式 /assets/site.css
   夜间路径地图：深夜靛蓝底 + 网格刻度 + 荧光青路径 + 暖橙入口
   ============================================================ */

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

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

body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,picture{max-width:100%}

:root{
  --ink-900:#0B1230;
  --ink-800:#141C44;
  --ink-700:#1E2A5E;
  --line:#2A3566;
  --cyan:#45F0E0;
  --cyan-soft:#8FF6EC;
  --orange:#FF8A3D;
  --amber:#FFC38A;
  --text:#EAF0FF;
  --muted:#9AA8CC;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-body:Inter,"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;

  --header-h:76px;
  --w-max:1240px;
  --gutter:clamp(20px,4vw,48px);
  --r-cut:14px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

html{scroll-behavior:smooth}

body{
  background-color:var(--ink-900);
  background-image:
    linear-gradient(to right,rgba(42,53,102,.42) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,53,102,.42) 1px,transparent 1px),
    radial-gradient(900px 520px at 78% -8%,rgba(69,240,224,.13),transparent 62%),
    radial-gradient(760px 460px at 4% 8%,rgba(30,42,94,.85),transparent 70%);
  background-size:96px 96px,96px 96px,100% 100%,100% 100%;
  background-attachment:fixed,fixed,scroll,scroll;
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

a{color:var(--cyan-soft);text-decoration:none;transition:color .16s var(--ease)}

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

::selection{background:rgba(69,240,224,.28);color:#fff}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:650;
  line-height:1.16;
  letter-spacing:-.01em;
  color:var(--text);
}
h1{font-size:clamp(32px,4.6vw,56px)}
h2{font-size:clamp(26px,3vw,40px)}
h3{font-size:clamp(20px,2vw,28px)}
h4{font-size:20px}
p{max-width:72ch}

.eyebrow{
  display:block;
  font-family:var(--font-body);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:14px;
}
.section-title{max-width:34ch}
.lede{
  font-size:16px;
  color:var(--muted);
  line-height:1.85;
  max-width:70ch;
}
.stat-value{
  font-variant-numeric:tabular-nums;
  font-weight:700;
  color:var(--cyan);
  letter-spacing:.01em;
}
.tag{
  display:inline-block;
  padding:3px 10px;
  border-radius:999px;
  border:1px solid rgba(143,246,236,.35);
  background:rgba(143,246,236,.08);
  color:var(--cyan-soft);
  font-size:12px;
  letter-spacing:.06em;
}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:var(--w-max);margin-inline:auto;padding-inline:var(--gutter)}

.section{padding-block:clamp(64px,8vw,120px);position:relative}

.band-panel{
  background:linear-gradient(180deg,var(--ink-800),rgba(20,28,68,.6));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}

main{padding-top:var(--header-h)}
main.main-flush{padding-top:0}

/* 对照骨架：左索引 / 右内容 */
.page-shell{
  display:grid;
  grid-template-columns:minmax(240px,300px) minmax(0,1fr);
  gap:clamp(32px,4.5vw,64px);
  align-items:start;
}
.index-rail{
  position:sticky;
  top:calc(var(--header-h) + 28px);
  padding:22px 20px 22px 18px;
  background:linear-gradient(180deg,rgba(20,28,68,.92),rgba(11,18,48,.55));
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - var(--r-cut)) 0,100% var(--r-cut),100% 100%,0 100%);
}
.index-list{display:flex;flex-direction:column;gap:2px}
.index-link{
  display:block;
  position:relative;
  padding:10px 12px 10px 18px;
  color:var(--muted);
  font-size:14px;
  border-left:2px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.index-link::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:12px;height:1px;
  background:var(--line);
  transform:translateY(-50%);
  transition:background-color .16s var(--ease),width .16s var(--ease);
}
.index-link:hover,.index-link:focus-visible{
  color:var(--text);
  border-left-color:var(--cyan);
  background:rgba(69,240,224,.06);
}
.index-link:hover::before,.index-link:focus-visible::before{background:var(--cyan);width:16px}
.index-link[aria-current="true"]{
  color:var(--text);
  border-left-color:var(--cyan);
  background:rgba(69,240,224,.08);
}
.index-link[aria-current="true"]::before{background:var(--cyan);width:16px}

.content-flow{display:flex;flex-direction:column;gap:clamp(40px,5vw,72px);min-width:0}

/* ---------- 切角面板 ---------- */
.cut-panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  background:linear-gradient(160deg,rgba(30,42,94,.78),rgba(20,28,68,.5));
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 18px) 0,100% 18px,100% 100%,0 100%);
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.cut-panel:hover{border-color:rgba(143,246,236,.55)}

/* ---------- 图片占位容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:
    linear-gradient(135deg,rgba(69,240,224,.10),transparent 55%),
    linear-gradient(315deg,rgba(255,138,61,.10),transparent 60%),
    var(--ink-700);
  border:1px solid var(--line);
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
}
.media-frame::after{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(to right,rgba(42,53,102,.55) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,53,102,.55) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.5;
  pointer-events:none;
}
.media-frame > img,
.media-frame > picture,
.media-frame > svg{
  position:relative;
  z-index:1;
  display:block;
  width:100%;height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}

/* ---------- 面包屑 ---------- */
.breadcrumb{margin-bottom:24px}
.breadcrumb-list{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted)}
.breadcrumb-item{display:flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:var(--line)}
.breadcrumb-item a{color:var(--muted)}
.breadcrumb-item a:hover{color:var(--cyan)}
.breadcrumb-item[aria-current="page"]{color:var(--text)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 20px;
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid var(--line);
  color:var(--text);
  background:transparent;
  cursor:pointer;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);
}
.btn-ghost:hover,.btn-ghost:focus-visible{
  color:var(--cyan-soft);
  border-color:rgba(143,246,236,.6);
  background:rgba(69,240,224,.08);
}
.btn-accent{
  border-color:rgba(255,138,61,.65);
  color:#1A0E04;
  background:var(--orange);
}
.btn-accent:hover,.btn-accent:focus-visible{
  background:var(--amber);
  border-color:var(--amber);
}

/* ============================================================
   HEADER
   ============================================================ */
.skip-link{
  position:fixed;
  left:16px;top:-64px;
  z-index:200;
  padding:10px 16px;
  background:var(--orange);
  color:#1A0E04;
  font-size:14px;font-weight:600;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px}

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:120;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),backdrop-filter .2s var(--ease);
}
.site-header[data-state="solid"]{
  background:rgba(11,18,48,.94);
  border-bottom-color:var(--line);
  backdrop-filter:blur(10px);
}

.scroll-progress{
  position:absolute;
  left:0;bottom:-1px;
  width:100%;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .12s linear;
}

.header-inner{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:14px var(--gutter);
  display:flex;
  align-items:center;
  gap:clamp(16px,3vw,40px);
  min-height:var(--header-h);
}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--text)}
.brand-mark{
  display:grid;
  place-items:center;
  width:40px;height:40px;
  font-family:var(--font-body);
  font-size:14px;font-weight:800;
  letter-spacing:.02em;
  color:#04140F;
  background:linear-gradient(140deg,var(--cyan),var(--cyan-soft));
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-family:var(--font-display);font-size:18px;font-weight:700;letter-spacing:.02em}
.brand-tagline{font-size:12px;color:var(--muted);letter-spacing:.02em}

.primary-nav{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,32px);
  margin-left:auto;
}
.nav-list{display:flex;align-items:center;gap:clamp(6px,1.4vw,20px);flex-wrap:wrap}
.nav-link{
  display:inline-block;
  position:relative;
  padding:8px 4px;
  font-size:14px;
  color:var(--text);
  background-image:linear-gradient(var(--cyan),var(--cyan));
  background-repeat:no-repeat;
  background-position:0 100%;
  background-size:0 1px;
  transition:color .16s var(--ease),background-size .18s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--cyan-soft);background-size:100% 1px}
.nav-link[aria-current="page"]{
  color:var(--cyan);
  background-size:100% 1px;
  font-weight:600;
}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:8px 12px;
  background:rgba(30,42,94,.7);
  border:1px solid var(--line);
  color:var(--text);
  font-family:var(--font-body);
  font-size:13px;
  cursor:pointer;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-toggle:hover,.nav-toggle:focus-visible{border-color:rgba(143,246,236,.6);color:var(--cyan-soft)}
.nav-toggle-label{letter-spacing:.06em}
.nav-toggle-bars{display:flex;flex-direction:column;gap:5px;width:18px}
.nav-toggle-bars i{display:block;height:2px;width:100%;background:currentColor;border-radius:2px;transition:transform .18s var(--ease),opacity .18s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
  margin-top:clamp(56px,7vw,96px);
  background:linear-gradient(180deg,var(--ink-800),var(--ink-900) 78%);
  border-top:1px solid var(--line);
  color:var(--text);
}
.footer-inner{
  width:100%;
  max-width:var(--w-max);
  margin-inline:auto;
  padding:clamp(48px,6vw,80px) var(--gutter) 32px;
  display:flex;
  flex-direction:column;
  gap:clamp(28px,4vw,48px);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(240px,1.1fr) minmax(0,2fr);
  gap:clamp(28px,4vw,64px);
}
.footer-brand{display:flex;flex-direction:column;gap:16px;align-items:flex-start}
.footer-intro{font-size:14px;color:var(--muted);line-height:1.85;max-width:44ch}

.footer-nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(140px,1fr));
  gap:clamp(20px,3vw,40px);
}
.footer-col{display:flex;flex-direction:column;gap:14px}
.footer-col-title{
  font-family:var(--font-body);
  font-size:12px;
  font-weight:600;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:var(--muted);
  background-image:linear-gradient(var(--cyan),var(--cyan));
  background-repeat:no-repeat;
  background-position:0 100%;
  background-size:0 1px;
  transition:color .16s var(--ease),background-size .18s var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--cyan-soft);background-size:100% 1px}

.footer-contact{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:clamp(20px,3vw,28px) 0;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:16px 40px;
}
.contact-list{display:flex;flex-wrap:wrap;gap:12px 40px}
.contact-list li{display:flex;flex-direction:column;gap:4px}
.contact-label{font-size:12px;letter-spacing:.14em;color:var(--muted)}
.contact-value{font-size:15px;color:var(--text);font-variant-numeric:tabular-nums}
.contact-note{font-size:13px;color:var(--muted);max-width:34ch}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 28px;
  font-size:13px;
  color:var(--muted);
}
.legal-icp{color:var(--muted)}
.legal-copy{color:var(--muted)}
.legal-links{display:flex;flex-wrap:wrap;gap:10px 20px;margin-left:auto}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  :root{--header-h:68px}

  .nav-toggle{display:inline-flex}

  .primary-nav{
    position:fixed;
    left:0;right:0;
    top:var(--header-h);
    margin:0;
    padding:22px var(--gutter) 28px;
    flex-direction:column;
    align-items:flex-start;
    gap:18px;
    background:rgba(11,18,48,.98);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s var(--ease);
  }
  .site-header[data-open="true"] .primary-nav{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-list{flex-direction:column;align-items:flex-start;gap:2px;width:100%}
  .nav-link{width:100%;padding:12px 2px;font-size:16px;border-bottom:1px solid rgba(42,53,102,.6)}
  .nav-actions{width:100%;flex-direction:column;align-items:stretch;gap:12px}
  .nav-actions .btn{width:100%}

  .page-shell{grid-template-columns:1fr}
  .index-rail{position:static;clip-path:none}
  .index-list{flex-direction:row;flex-wrap:wrap;gap:6px}
  .index-link{border-left:0;border:1px solid var(--line);padding:8px 14px}
  .index-link::before{display:none}

  .footer-top{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
}

@media (max-width:640px){
  body{font-size:15px}
  .brand-tagline{display:none}
  .footer-contact{flex-direction:column}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .legal-links{margin-left:0}
  .section{padding-block:56px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    transition-delay:0ms !important;
  }
}