/* =========================================================
   欧博娱乐 · ABG-VOYAGE 共享站点样式 / assets/site.css
   深夜航图与仪表盘气质：深墨蓝基底 + 电光青 / 暖橙功能色
   ========================================================= */

:root{
  --ink:#0A1628;
  --ink-2:#10243E;
  --ink-3:#162F4D;
  --cyan:#2FE6D6;
  --cyan-dim:#1AA9A0;
  --orange:#FF8A3D;
  --amber:#FFC38A;
  --paper:#E8F1F8;
  --muted:#8AA0B5;
  --line:#24405C;

  --r-sm:12px;
  --r-md:18px;
  --r-lg:28px;
  --r-xl:44px;
  --pill:999px;

  --zh:'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --mono:'JetBrains Mono','Roboto Mono','SFMono-Regular',monospace;

  --wrap:1180px;
  --gutter:clamp(1.1rem,4vw,3rem);
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-lift:0 18px 40px -26px rgba(0,0,0,.85);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--zh);
  font-size:17px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.012em;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0 0 .6em;font-weight:300;letter-spacing:.09em;line-height:1.25}
h1{font-size:clamp(2.4rem,5.6vw,4.2rem);letter-spacing:.1em}
h2{font-size:clamp(1.6rem,3.2vw,2.2rem)}
h3{font-size:clamp(1.15rem,2.2vw,1.4rem)}
p{margin:0 0 1em}
a{color:var(--cyan);text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg{max-width:100%;display:block}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
a:focus:not(:focus-visible),button:focus:not(:focus-visible){outline:none}

/* ---------- 基础布局件 ---------- */
.container{width:100%;max-width:var(--wrap);margin:0 auto;padding-inline:var(--gutter)}
.container--narrow{max-width:820px}
.section{padding-block:clamp(2.6rem,6vw,5rem)}
.section__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:.5rem 1.2rem;margin-bottom:clamp(1.2rem,3vw,2rem)}
.eyebrow{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.32em;color:var(--muted);
  text-transform:uppercase;margin:0 0 .4rem;
}
.divider{height:1px;border:0;margin:clamp(1.6rem,4vw,2.8rem) 0;
  background:linear-gradient(90deg,var(--line),transparent 85%);}
.grid{display:grid;gap:clamp(1rem,2.4vw,1.8rem)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--asym{grid-template-columns:minmax(0,1.65fr) minmax(0,1fr)}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 展览标签 / 说明牌 / 编号 ---------- */
.label-tag{
  display:inline-flex;align-items:center;gap:.45rem;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;
  padding:.32rem .8rem;border:1px solid var(--cyan-dim);border-radius:var(--pill);
  color:var(--cyan);background:rgba(26,169,160,.08);text-transform:uppercase;
}
.label-tag--orange{border-color:var(--orange);color:var(--amber);background:rgba(255,138,61,.09)}
.spec-plate{
  border-left:2px solid var(--amber);padding:.7rem 0 .7rem 1rem;
  font-size:.95rem;color:var(--paper);background:linear-gradient(90deg,rgba(255,195,138,.07),transparent 70%);
}
.index-num{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;color:var(--cyan-dim)}
.panel{
  position:relative;background:var(--ink-2);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:clamp(1.2rem,3vw,2rem);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.panel:hover{transform:translateY(-3px);border-color:var(--cyan-dim);box-shadow:var(--shadow-lift)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.82rem 1.6rem;border-radius:var(--pill);
  border:1px solid var(--line);color:var(--paper);background:transparent;
  font-size:.95rem;letter-spacing:.08em;text-decoration:none;
  transition:transform .28s var(--ease),background-color .28s var(--ease),
             border-color .28s var(--ease),color .28s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--orange);border-color:var(--orange);color:var(--ink);font-weight:500}
.btn--primary:hover{background:var(--amber);border-color:var(--amber);color:var(--ink)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 面包屑 ---------- */
.breadcrumbs{margin-bottom:1.2rem}
.breadcrumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;color:var(--muted)}
.breadcrumbs__item a{color:var(--muted)}
.breadcrumbs__item a:hover{color:var(--cyan)}
.breadcrumbs__sep{color:var(--line)}
.breadcrumbs__item[aria-current="page"]{color:var(--paper)}

/* ---------- 正文排版 ---------- */
.prose{max-width:68ch}
.prose h2{margin-top:1.8em}
.prose h3{margin-top:1.4em;color:var(--cyan)}
.prose a{border-bottom:1px solid var(--cyan-dim)}
.prose a:hover{color:var(--amber);border-bottom-color:var(--orange)}
.prose ul{margin:0 0 1.2em;padding-left:0}
.prose ul li{position:relative;padding-left:1.4rem;margin-bottom:.5em}
.prose ul li::before{content:"";position:absolute;left:0;top:.85em;width:8px;height:1px;background:var(--cyan)}

/* ---------- 图片容器基础规则（页面阶段使用） ---------- */
.media-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background-color:var(--ink-2);
  aspect-ratio:16/9;
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--cut{border-top-right-radius:var(--r-xl);border-bottom-left-radius:var(--r-xl)}
.media-placeholder{
  background-image:
    repeating-linear-gradient(0deg,rgba(36,64,92,.55) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(36,64,92,.55) 0 1px,transparent 1px 44px),
    radial-gradient(120% 90% at 82% 12%,rgba(47,230,214,.14),transparent 62%);
}
.media-frame__caption{
  position:absolute;left:1rem;bottom:1rem;right:1rem;
  font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;color:var(--paper);
  background:rgba(10,22,40,.78);border:1px solid var(--line);border-radius:var(--pill);
  padding:.35rem .8rem;backdrop-filter:blur(6px);
}

/* ---------- 显现协议 ---------- */
[data-reveal]{transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js-reveal [data-reveal]{opacity:0;transform:translateY(16px)}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* =========================================================
   页头：居中刊头 + 编号栏目
   ========================================================= */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,rgba(10,22,40,.97),rgba(10,22,40,.9));
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header__inner{
  width:100%;max-width:var(--wrap);margin:0 auto;
  padding:clamp(.85rem,2vw,1.35rem) var(--gutter) 0;
}
.skip-link{
  position:absolute;left:1rem;top:-4rem;z-index:90;
  padding:.6rem 1.1rem;border-radius:var(--pill);
  background:var(--orange);color:var(--ink);font-size:.85rem;letter-spacing:.08em;
  transition:top .25s var(--ease);
}
.skip-link:focus{top:.7rem;color:var(--ink)}

.masthead{position:relative;text-align:center;padding-top:.2rem}
.masthead__kicker{
  margin:0 0 .45rem;font-family:var(--mono);font-size:.66rem;
  letter-spacing:.38em;text-transform:uppercase;color:var(--muted);
}
.brand{display:inline-flex;flex-direction:column;align-items:center;gap:.3rem;color:var(--paper)}
.brand:hover{color:var(--paper)}
.brand__mark{
  font-size:clamp(1.75rem,4.6vw,2.9rem);font-weight:300;
  letter-spacing:.18em;line-height:1.1;
  text-shadow:0 0 26px rgba(47,230,214,.18);
}
.brand__sub{font-family:var(--mono);font-size:.66rem;letter-spacing:.26em;color:var(--cyan-dim)}
.masthead::after{
  content:"";display:block;height:1px;margin:.95rem auto 0;width:100%;
  background:linear-gradient(90deg,transparent,var(--line) 14%,var(--line) 86%,transparent);
}

.nav-bar{
  position:relative;display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;gap:.5rem 1.2rem;
  padding:.55rem 0 .85rem;
}
.nav-toggle{display:none;grid-column:1;grid-row:1;justify-self:start;
  align-items:center;gap:.6rem;padding:.45rem .85rem;
  border:1px solid var(--line);border-radius:var(--pill);
  color:var(--paper);font-size:.82rem;letter-spacing:.1em;
  transition:border-color .25s var(--ease),color .25s var(--ease)}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:block;width:18px;height:2px;background:var(--cyan);
  box-shadow:0 6px 0 var(--cyan),0 -6px 0 var(--cyan);transition:box-shadow .25s var(--ease)}
.nav-toggle__label{font-family:var(--mono);font-size:.7rem;letter-spacing:.18em;color:var(--muted)}
.site-header[data-open] .nav-toggle__bars{box-shadow:0 0 0 var(--cyan),0 0 0 var(--cyan)}

.site-nav{grid-column:2;grid-row:1;border-top:1px solid transparent}
.site-nav__list{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:clamp(.3rem,1.8vw,1.9rem)}
.site-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:.45rem;
  padding:.35rem .1rem;color:var(--paper);font-size:.97rem;
  letter-spacing:.07em;transition:color .25s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;bottom:-.15rem;height:1px;width:0;
  background:var(--cyan);transition:width .3s var(--ease);
}
.site-nav__link:hover{color:var(--cyan)}
.site-nav__link:hover::after{width:100%}
.site-nav__num{font-family:var(--mono);font-size:.64rem;letter-spacing:.08em;color:var(--cyan-dim)}
.site-nav__link[aria-current="page"]{color:var(--cyan)}
.site-nav__link[aria-current="page"]::after{width:100%;background:var(--orange)}

.nav-cta{
  grid-column:3;grid-row:1;justify-self:end;
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.5rem 1.05rem;border:1px solid var(--line);border-radius:var(--pill);
  background:rgba(22,47,77,.55);color:var(--paper);
  font-size:.85rem;letter-spacing:.08em;
  transition:border-color .25s var(--ease),color .25s var(--ease),background-color .25s var(--ease);
}
.nav-cta:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(47,230,214,.08)}
.status-dot{
  width:7px;height:7px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 3px rgba(47,230,214,.16);flex:0 0 auto;
}

.scroll-meter{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none}
.scroll-meter__fill{display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
  transition:width .12s linear}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;margin-top:clamp(3rem,7vw,6rem);
  background:var(--ink-2);border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:2px;opacity:.7;
  background:linear-gradient(90deg,var(--cyan),var(--cyan-dim) 20%,var(--line) 58%,var(--orange));
}
.site-footer__inner{padding-block:clamp(2.2rem,5vw,3.6rem)}
.footer-grid{
  display:grid;gap:clamp(1.6rem,4vw,3rem);
  grid-template-columns:1.6fr 1fr 1.4fr;
}
.footer-col{min-width:0}
.footer-brand{
  display:inline-block;color:var(--paper);
  font-size:clamp(1.3rem,2.6vw,1.7rem);font-weight:300;letter-spacing:.18em;
}
.footer-brand:hover{color:var(--cyan)}
.footer-tagline{margin:.7rem 0 .9rem;color:var(--muted);font-size:.95rem;max-width:34ch}
.footer-note{display:flex;align-items:center;gap:.55rem;margin:0;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;color:var(--cyan-dim)}
.footer-heading{
  margin:0 0 1rem;font-family:var(--mono);font-size:.68rem;font-weight:400;
  letter-spacing:.28em;text-transform:uppercase;color:var(--muted);
}
.footer-list{display:grid;gap:.55rem}
.footer-link{color:var(--paper);font-size:.95rem;letter-spacing:.04em;
  border-bottom:1px solid transparent;transition:color .25s var(--ease),border-color .25s var(--ease)}
.footer-link:hover{color:var(--cyan);border-bottom-color:var(--cyan-dim)}
.footer-contact{display:grid;gap:.7rem}
.footer-contact__row{display:grid;grid-template-columns:3.6rem minmax(0,1fr);gap:.7rem;align-items:baseline}
.footer-contact__label{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;color:var(--muted)}
.footer-contact__value{font-size:.93rem;color:var(--paper);word-break:break-word}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:.5rem 1.6rem;justify-content:space-between;
  margin-top:clamp(1.6rem,4vw,2.4rem);padding-top:1.1rem;
  border-top:1px solid var(--line);
  font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;color:var(--muted);
}
.footer-bottom p{margin:0}
.footer-bottom__icp{color:var(--cyan-dim)}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--asym{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr)}
}
@media (max-width:900px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-col--brand{grid-column:1 / -1}
}
@media (max-width:880px){
  .nav-bar{grid-template-columns:auto 1fr auto;padding:.5rem 0 .7rem}
  .nav-toggle{display:inline-flex}
  .nav-cta{padding:.45rem .8rem;font-size:.78rem}
  .site-nav{
    grid-column:1 / -1;grid-row:2;
    max-height:0;overflow:hidden;width:100%;
    transition:max-height .38s var(--ease);
  }
  .site-header[data-open] .site-nav,
  .site-nav[data-open]{
    max-height:32rem;border-top-color:var(--line);margin-top:.55rem;
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .site-nav__link{
    width:100%;justify-content:flex-start;
    padding:.72rem .3rem;border-bottom:1px solid rgba(36,64,92,.55);
  }
  .site-nav__link::after{display:none}
  .site-nav__item:last-child .site-nav__link{border-bottom:0}
  .grid--2,.grid--3,.grid--asym{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:560px){
  body{font-size:16px}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-contact__row{grid-template-columns:3.2rem minmax(0,1fr)}
  .footer-bottom{flex-direction:column;gap:.4rem}
}

/* =========================================================
   动效降级
   ========================================================= */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important}
  .js-reveal [data-reveal]{opacity:1;transform:none}
  .scroll-meter__fill{transition:none}
  .panel:hover,.btn:hover{transform:none}
}

@media print{
  .site-header,.site-footer,.scroll-meter{display:none}
  body{background:#fff;color:#000}
}