/* ==========================================================================
   酷游指南 · /assets/site.css
   语言：夜间通道调度屏 — 深空底 / 电光青轨迹 / 暖橙行动 / 薄荷绿安全标记
   ========================================================================== */

:root{
  --ink:#050B16;
  --night:#0B1730;
  --glass:#142844;
  --mask:#01040A;
  --cyan:#3DE8FF;
  --orange:#FF8A3D;
  --mint:#6FFFC2;
  --amber:#FFC857;
  --paper:#F2F7FF;
  --mist:#A8B6C9;
  --line:#29405A;
  --link:#8CC8FF;

  --shell:1240px;
  --gutter:clamp(1rem,4.2vw,2.75rem);
  --radius-s:12px;
  --radius:20px;
  --radius-l:28px;

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

  --ease:cubic-bezier(.22,.72,.24,1);
  --t:180ms;
  --shadow-float:0 26px 64px -36px rgba(1,4,10,.98);
}

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

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
}
@media (prefers-reduced-motion: no-preference){
  html{scroll-behavior:smooth}
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  font-size:clamp(1rem,.94rem + .22vw,1.0625rem);
  line-height:1.8;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 640px at 84% -12%, rgba(61,232,255,.12), transparent 62%),
    radial-gradient(820px 520px at 4% 2%, rgba(255,138,61,.08), transparent 58%),
    radial-gradient(940px 720px at 50% 106%, rgba(111,255,194,.06), transparent 60%);
  background-repeat:no-repeat;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(41,64,90,.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(41,64,90,.28) 1px, transparent 1px);
  background-size:76px 76px;
  -webkit-mask-image:radial-gradient(ellipse 92% 72% at 50% 0%, #000 0%, transparent 82%);
  mask-image:radial-gradient(ellipse 92% 72% at 50% 0%, #000 0%, transparent 82%);
  opacity:.72;
}

main{position:relative;z-index:1;display:block}

img,video,svg{display:block;max-width:100%;height:auto}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.2;
  margin:0;
  text-wrap:balance;
}
h1{font-size:clamp(2.25rem,5.6vw,4rem);letter-spacing:-.04em;line-height:1.06}
h2{font-size:clamp(1.6rem,3.2vw,2.5rem)}
h3{font-size:clamp(1.15rem,1.7vw,1.4rem);line-height:1.42}
p{margin:0;max-width:36em}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
[hidden]{display:none !important}

:where(a,button,summary,input,[tabindex]):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 通用工具 ---------- */
.shell{
  width:min(var(--shell), 100% - (var(--gutter) * 2));
  margin-inline:auto;
}

.section{padding-block:clamp(2.5rem,6vw,5rem)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:1rem 2rem;margin-bottom:clamp(1.25rem,3vw,2.25rem)}
.section-index{
  font-family:var(--font-mono);
  font-size:clamp(2.4rem,6vw,4.6rem);
  line-height:.9;
  letter-spacing:-.03em;
  color:rgba(61,232,255,.24);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor}

.mono{font-family:var(--font-mono);font-size:.8125rem;letter-spacing:.08em;color:var(--mist)}

.vertical-note{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.34em;
  color:var(--mist);
}

.link{
  color:var(--link);
  text-decoration:underline;
  text-decoration-color:rgba(140,200,255,.42);
  text-underline-offset:.24em;
  transition:color var(--t) var(--ease), text-decoration-color var(--t) var(--ease);
}
.link:hover{color:var(--cyan);text-decoration-color:var(--cyan)}

.glass{
  background:linear-gradient(158deg, rgba(20,40,68,.86), rgba(11,23,48,.66));
  border:1px solid rgba(61,232,255,.16);
  border-radius:var(--radius);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-float);
}

.path-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(1rem,2.2vw,1.75rem)}
.grid-auto{display:grid;gap:clamp(1rem,2.4vw,1.75rem);grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr))}

/* ---------- 图片容器基础规则（页面阶段放 <img>） ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:4 / 3;
  border-radius:var(--radius);
  border:1px solid rgba(41,64,90,.95);
  background:
    linear-gradient(152deg, rgba(20,40,68,.92), rgba(5,11,22,.94)),
    repeating-linear-gradient(135deg, rgba(61,232,255,.09) 0 2px, transparent 2px 13px);
  isolation:isolate;
}
.media-frame > img,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg, transparent 46%, rgba(1,4,10,.78) 100%),
    linear-gradient(102deg, transparent 78%, rgba(61,232,255,.16) 78.4%, transparent 79%);
  pointer-events:none;
}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
@media (max-width:640px){
  .media-frame,.media-frame--wide,.media-frame--tall{aspect-ratio:4 / 3}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.45rem;
  padding:.62rem 1.15rem;
  border-radius:999px;
  border:1px solid transparent;
  font-size:.875rem;
  font-weight:700;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:background var(--t) var(--ease), border-color var(--t) var(--ease),
             color var(--t) var(--ease), transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--orange);color:#160A02;border-color:rgba(255,138,61,.7)}
.btn-primary:hover{background:#FFA464;box-shadow:0 0 0 4px rgba(255,138,61,.16)}
.btn-ghost{background:rgba(61,232,255,.07);color:var(--cyan);border-color:rgba(61,232,255,.4)}
.btn-ghost:hover{background:rgba(61,232,255,.15);border-color:var(--cyan);color:var(--paper)}
.btn-line{background:transparent;color:var(--paper);border-color:var(--line)}
.btn-line:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 跳转链 ---------- */
.skip-link{
  position:fixed;
  top:.75rem;
  left:.75rem;
  z-index:200;
  padding:.7rem 1.15rem;
  border-radius:999px;
  background:var(--cyan);
  color:var(--ink);
  font-size:.875rem;
  font-weight:700;
  transform:translateY(-180%);
  transition:transform var(--t) var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ==========================================================================
   页头 — 悬浮玻璃胶囊
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding-block:clamp(.5rem,1.4vw,.9rem);
  background:linear-gradient(180deg, rgba(5,11,22,.95) 0%, rgba(5,11,22,.76) 62%, rgba(5,11,22,0) 100%);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.header-shell{position:relative}
.header-bar{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(.6rem,1.6vw,1.5rem);
  min-height:58px;
  padding:.4rem .5rem .4rem 1rem;
  border-radius:999px;
  background:linear-gradient(155deg, rgba(20,40,68,.9), rgba(11,23,48,.74));
  border:1px solid rgba(61,232,255,.16);
  box-shadow:var(--shadow-float), inset 0 1px 0 rgba(242,247,255,.07);
}

.brand{display:inline-flex;align-items:center;gap:.6rem;flex:0 0 auto}
.brand-mark{
  position:relative;
  width:32px;
  height:32px;
  flex:0 0 auto;
  border-radius:10px;
  border:1px solid rgba(61,232,255,.5);
  background:
    radial-gradient(circle at 30% 18%, rgba(61,232,255,.42), rgba(61,232,255,0) 62%),
    rgba(5,11,22,.78);
}
.brand-mark::before,
.brand-mark::after{
  content:"";
  position:absolute;
  left:8px;
  width:14px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
}
.brand-mark::before{top:11px;transform:rotate(-38deg)}
.brand-mark::after{bottom:11px;transform:rotate(-38deg);background:var(--orange);opacity:.92}
.brand-text{display:block;min-width:0}
.brand-name{
  display:block;
  font-family:var(--font-display);
  font-weight:900;
  font-size:1rem;
  line-height:1.2;
  letter-spacing:.02em;
  color:var(--paper);
}
.brand-sub{
  display:block;
  margin-top:2px;
  font-family:var(--font-mono);
  font-size:.625rem;
  line-height:1.2;
  letter-spacing:.12em;
  color:var(--mist);
}

/* --- 导航 --- */
.site-nav{
  display:flex;
  flex:1 1 auto;
  justify-content:center;
  min-width:0;
}
.nav-list{display:flex;align-items:center;gap:.1rem}
.nav-item{display:flex}
.nav-link{
  display:inline-block;
  padding:.46rem .74rem;
  border-radius:999px;
  font-size:.875rem;
  font-weight:500;
  white-space:nowrap;
  color:var(--mist);
  transition:color var(--t) var(--ease), background var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(61,232,255,.1)}
.nav-link[aria-current="page"]{
  color:var(--ink);
  font-weight:700;
  background:var(--cyan);
  box-shadow:0 0 0 1px rgba(61,232,255,.55), 0 8px 20px -10px rgba(61,232,255,.95);
}

/* --- 移动按钮 --- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.5rem .7rem;
  border-radius:999px;
  border:1px solid rgba(61,232,255,.3);
  color:var(--cyan);
  font-size:.8125rem;
  font-weight:700;
  letter-spacing:.06em;
  transition:background var(--t) var(--ease), border-color var(--t) var(--ease);
}
.nav-toggle:hover{background:rgba(61,232,255,.1);border-color:var(--cyan)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:16px}
.nav-toggle-bars span{
  display:block;
  height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform var(--t) var(--ease), opacity var(--t) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.nav-toggle-label{line-height:1}

/* --- 右侧行动区 --- */
.header-actions{display:flex;align-items:center;gap:.6rem;flex:0 0 auto}
.header-status{
  display:inline-flex;
  align-items:center;
  gap:.42rem;
  padding:.32rem .62rem;
  border-radius:999px;
  border:1px solid rgba(111,255,194,.28);
  background:rgba(111,255,194,.06);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  color:var(--mint);
  white-space:nowrap;
}
.status-dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 3px rgba(111,255,194,.18);
}
@media (prefers-reduced-motion: no-preference){
  .status-dot{animation:status-pulse 2.6s var(--ease) infinite}
  @keyframes status-pulse{
    0%,100%{box-shadow:0 0 0 3px rgba(111,255,194,.18)}
    50%{box-shadow:0 0 0 6px rgba(111,255,194,.05)}
  }
}

/* --- 滚动进度光轨 --- */
.scroll-line{
  position:absolute;
  left:0;
  right:0;
  bottom:1px;
  height:2px;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--mint) 55%,var(--orange) 100%);
  box-shadow:0 0 12px rgba(61,232,255,.45);
  pointer-events:none;
}

/* --- 页头响应式 --- */
@media (max-width:1180px){
  .header-status{display:none}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .header-actions{margin-left:auto}
  .site-nav{
    position:absolute;
    top:calc(100% + .55rem);
    left:0;
    right:0;
    flex-direction:column;
    justify-content:flex-start;
    padding:.55rem;
    border-radius:22px;
    background:linear-gradient(160deg, rgba(20,40,68,.98), rgba(11,23,48,.98));
    border:1px solid rgba(61,232,255,.22);
    box-shadow:var(--shadow-float);
    opacity:0;
    visibility:hidden;
    transform:translateY(-.5rem);
    transition:opacity var(--t) var(--ease), transform var(--t) var(--ease), visibility var(--t) var(--ease);
  }
  .site-header[data-open="true"] .site-nav{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:.12rem}
  .nav-link{padding:.72rem .9rem;border-radius:14px;font-size:.95rem}
}
@media (max-width:560px){
  .header-bar{gap:.5rem;padding:.35rem .4rem .35rem .72rem;min-height:54px}
  .brand-sub{display:none}
  .brand-mark{width:28px;height:28px;border-radius:9px}
  .brand-mark::before,.brand-mark::after{left:7px;width:12px}
  .brand-mark::before{top:9px}
  .brand-mark::after{bottom:9px}
  .btn{padding:.52rem .85rem;font-size:.8125rem}
  .nav-toggle{padding:.45rem .6rem;font-size:.75rem}
  .nav-toggle-bars{width:14px}
}

/* ==========================================================================
   页脚 — 光轨 + 三级信息层
   ========================================================================== */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(4rem,9vw,8rem);
  overflow:hidden;
  border-top:1px solid rgba(41,64,90,.7);
  background:linear-gradient(180deg, rgba(11,23,48,.6) 0%, rgba(5,11,22,.98) 42%, var(--ink) 100%);
}
.footer-paths{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.footer-paths::before{
  content:"";
  position:absolute;
  top:-30%;
  left:58%;
  width:1px;
  height:160%;
  background:linear-gradient(180deg, transparent, rgba(61,232,255,.32) 34%, rgba(255,138,61,.24) 78%, transparent);
  transform:rotate(9deg);
}
.footer-paths::after{
  content:"";
  position:absolute;
  bottom:-14%;
  left:14%;
  width:1px;
  height:130%;
  background:linear-gradient(180deg, transparent, rgba(111,255,194,.22), transparent);
  transform:rotate(-12deg);
}
.footer-shell{
  position:relative;
  z-index:1;
  padding-block:clamp(2.5rem,6vw,4.5rem) clamp(1.5rem,3vw,2.25rem);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr) minmax(0,.95fr);
  gap:clamp(1.75rem,4.5vw,3.5rem);
}
.footer-summary{
  margin-top:1.1rem;
  max-width:30em;
  font-size:.9375rem;
  line-height:1.85;
  color:var(--mist);
}
.footer-marks{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.25rem}
.footer-mark{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.3rem .7rem;
  border-radius:999px;
  border:1px solid rgba(41,64,90,.95);
  background:rgba(20,40,68,.5);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.06em;
}
.mark-key{color:var(--cyan)}
.mark-val{color:var(--mist)}

.footer-nav{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem 1.25rem}
.footer-col-title{
  position:relative;
  margin-bottom:.95rem;
  padding-left:.95rem;
  font-size:.9rem;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--paper);
}
.footer-col-title::before{
  content:"";
  position:absolute;
  left:0;
  top:.55em;
  width:6px;
  height:6px;
  border-radius:1px;
  background:var(--cyan);
  transform:rotate(45deg);
}
.footer-links{display:flex;flex-direction:column;gap:.15rem}
.footer-link{
  display:inline-block;
  padding-block:.28rem;
  font-size:.9375rem;
  color:var(--mist);
  transition:color var(--t) var(--ease), transform var(--t) var(--ease);
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-link[aria-current="page"]{color:var(--paper);font-weight:700}

.contact-list{display:flex;flex-direction:column;gap:.1rem}
.contact-item{
  display:flex;
  gap:.75rem;
  padding-block:.42rem;
  border-bottom:1px dashed rgba(41,64,90,.72);
  font-size:.875rem;
}
.contact-key{
  flex:0 0 auto;
  min-width:3.2em;
  padding-top:.16em;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.12em;
  color:var(--mist);
}
.contact-val{color:var(--paper);word-break:break-word}
.contact-note{
  margin-top:1rem;
  max-width:32em;
  font-size:.8125rem;
  line-height:1.78;
  color:var(--mist);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.55rem 1.6rem;
  margin-top:clamp(2rem,4.5vw,3.25rem);
  padding-top:1.35rem;
  border-top:1px solid rgba(41,64,90,.62);
  font-size:.8125rem;
  color:var(--mist);
}
.footer-copy{font-family:var(--font-mono);letter-spacing:.08em;color:var(--paper);max-width:none}
.footer-icp{font-family:var(--font-mono);letter-spacing:.04em;max-width:none}
.footer-legal{display:flex;flex-wrap:wrap;gap:.4rem 1.15rem}
.footer-legal a{color:var(--mist);transition:color var(--t) var(--ease)}
.footer-legal a:hover{color:var(--cyan)}

@media (max-width:980px){
  .footer-top{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:600px){
  .footer-top{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:1fr 1fr}
  .footer-base{flex-direction:column;align-items:flex-start}
}

/* ==========================================================================
   通用页面组件 — 面包屑 / 筛选 / 显现
   ========================================================================== */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  padding-block:clamp(.9rem,2vw,1.4rem);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  color:var(--mist);
}
.breadcrumbs li{display:inline-flex;align-items:center}
.breadcrumbs li::after{content:"/";margin-inline:.55rem;color:var(--line)}
.breadcrumbs li:last-child::after{content:"";margin:0}
.breadcrumbs a{color:var(--mist);transition:color var(--t) var(--ease)}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs [aria-current="page"]{color:var(--paper)}

.filter-bar{display:flex;flex-wrap:wrap;gap:.5rem;margin-block:clamp(1rem,2.5vw,1.75rem)}
.filter-btn{
  padding:.5rem .95rem;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(20,40,68,.5);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  transition:color var(--t) var(--ease), border-color var(--t) var(--ease),
             background var(--t) var(--ease), transform var(--t) var(--ease);
}
.filter-btn:hover{color:var(--paper);border-color:rgba(61,232,255,.5);transform:translateY(-1px)}
.filter-btn[aria-pressed="true"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
  font-weight:700;
}

[data-reveal]{
  transition:opacity .55s var(--ease), transform .55s var(--ease);
}
.js [data-reveal]:not(.is-in){opacity:0;transform:translateY(16px)}

/* ---------- 全局动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js [data-reveal]:not(.is-in){opacity:1;transform:none}
  .btn:hover,.filter-btn:hover,.footer-link:hover{transform:none}
}