/* =========================================================
   太阳集团游戏 · 共享样式 /assets/site.css
   光轨导览 · 日光金橙 × 深空蓝黑
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root{
  --sun:#FF8A18;
  --space:#0B1020;
  --deep:#161D38;
  --dawn:#FF5D7A;
  --halo:#FFF7EC;
  --amber:#FFC46B;
  --brown:#A34A00;
  --edge:#2E3760;
  --slate:#9AA3BE;
  --mint:#4FE0C8;

  --rail-w:88px;
  --bar-h:64px;
  --content:1200px;
  --narrow:720px;

  --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-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --line:2px solid var(--edge);
  --shadow-hard:8px 8px 0 0 var(--edge);
  --ease:cubic-bezier(.22,.68,.3,1);
  --scroll-progress:0;
}

/* ---------- 2. Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}

body{
  min-height:100vh;
  padding-top:var(--bar-h);
  background-color:var(--space);
  background-image:
    radial-gradient(55% 40% at 84% 0%, rgba(255,138,24,.18), transparent 68%),
    radial-gradient(45% 35% at 4% 100%, rgba(255,93,122,.13), transparent 70%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--halo);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  overflow-x:hidden;
}

@media (min-width:1024px){
  body{padding-top:0;padding-left:var(--rail-w)}
}

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

.skip-link{
  position:absolute;
  left:14px;
  top:-80px;
  z-index:200;
  padding:12px 20px;
  background:var(--sun);
  color:var(--space);
  font-weight:800;
  border:2px solid var(--space);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px}

/* ---------- 3. 中文排版 ---------- */
.display{font-size:clamp(44px,8vw,132px);font-weight:900;line-height:.96;letter-spacing:-.02em}
.h2{font-size:clamp(28px,4vw,56px);font-weight:800;line-height:1.14;letter-spacing:-.01em}
.h3{font-size:clamp(20px,2.2vw,28px);font-weight:700;line-height:1.34}
.lede{font-size:clamp(17px,1.6vw,20px);line-height:1.8;color:var(--slate);max-width:38em}
.eyebrow{display:inline-block;font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.24em;color:var(--sun);text-transform:uppercase}
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.highlight{color:var(--sun)}
.glow-text{color:var(--halo);text-shadow:0 0 1px var(--sun),0 0 20px rgba(255,138,24,.55)}
.note-vertical{
  writing-mode:vertical-rl;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--slate);
  line-height:1;
}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- 4. 布局容器 ---------- */
.container{width:100%;max-width:var(--content);margin-inline:auto;padding-inline:20px}
.container--narrow{max-width:calc(var(--narrow) + 40px)}
.section{position:relative;padding-block:clamp(64px,9vw,140px)}
.section--tight{padding-block:clamp(40px,5vw,76px)}
.section--band{background:var(--deep);border-top:2px solid var(--edge);border-bottom:2px solid var(--edge)}
.section__head{display:flex;flex-direction:column;gap:14px;max-width:var(--narrow);margin-bottom:clamp(32px,5vw,64px)}
.grid{display:grid;gap:clamp(20px,3vw,36px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.stack{display:flex;flex-direction:column;gap:clamp(16px,2vw,28px)}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 26px;
  background:var(--sun);
  border:2px solid var(--sun);
  color:var(--space);
  font-size:16px;font-weight:800;letter-spacing:.02em;
  box-shadow:6px 6px 0 0 rgba(255,138,24,.28);
  cursor:pointer;
  transition:transform .16s var(--ease),background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease);
}
.btn:hover{background:var(--amber);border-color:var(--amber);transform:translate(-2px,-2px)}
.btn:active{transform:translate(2px,2px);box-shadow:2px 2px 0 0 rgba(255,138,24,.28)}
.btn--ghost{background:transparent;border-color:var(--edge);color:var(--halo);box-shadow:6px 6px 0 0 rgba(46,55,96,.6)}
.btn--ghost:hover{background:rgba(255,138,24,.1);border-color:var(--sun);color:var(--sun)}
.btn--sm{padding:10px 16px;font-size:14px}
.btn--block{width:100%}

/* ---------- 6. 通用组件 ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;color:var(--slate)}
.breadcrumb__item{display:flex;align-items:center;gap:8px}
.breadcrumb__sep{color:var(--edge)}
.breadcrumb a:hover{color:var(--sun)}

.card{
  padding:clamp(20px,3vw,32px);
  background:var(--deep);
  border:var(--line);
  box-shadow:var(--shadow-hard);
  transition:border-color .16s var(--ease),transform .16s var(--ease);
}
.card:hover{border-color:var(--sun);transform:translate(-2px,-2px)}
.card__title{font-size:20px;font-weight:800;margin-bottom:10px}
.card__text{font-size:16px;color:var(--slate)}

.plate{
  padding:18px 22px;
  background:var(--deep);
  border:var(--line);
  box-shadow:8px 8px 0 0 rgba(46,55,96,.75);
}
.plate__row{display:flex;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px dashed rgba(46,55,96,.9);font-size:15px}
.plate__row:last-child{border-bottom:0}
.plate__key{color:var(--slate)}
.plate__val{font-family:var(--font-mono);color:var(--halo);text-align:right;word-break:break-all}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:2px solid var(--edge);font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--amber)}
.tag--gold{border-color:var(--sun);color:var(--sun)}
.tag--pink{border-color:var(--dawn);color:var(--dawn)}
.tag--mint{border-color:var(--mint);color:var(--mint)}

.media-frame{
  position:relative;
  aspect-ratio:16 / 9;
  overflow:hidden;
  background:var(--deep);
  border:var(--line);
  box-shadow:var(--shadow-hard);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame__cap{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 14px;
  background:rgba(11,16,32,.86);
  border-top:2px solid var(--edge);
  font-size:13px;color:var(--slate);
}

.halo{
  position:absolute;
  width:var(--halo-size,420px);
  height:var(--halo-size,420px);
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,138,24,.42),rgba(255,138,24,.12) 46%,transparent 70%);
  pointer-events:none;
  z-index:0;
  animation:halo-breathe 7s ease-in-out infinite;
}
@keyframes halo-breathe{
  0%,100%{transform:scale(1);opacity:.85}
  50%{transform:scale(1.08);opacity:1}
}

.tabs{display:block}
.tablist{display:flex;flex-wrap:wrap;background:var(--deep);border:var(--line)}
.tab{
  padding:12px 20px;
  border-right:var(--line);
  color:var(--slate);
  font-size:15px;font-weight:700;
  transition:background-color .16s var(--ease),color .16s var(--ease);
}
.tab:last-child{border-right:0}
.tab:hover{color:var(--halo);background:rgba(255,138,24,.1)}
.tab[aria-selected="true"]{background:var(--sun);color:var(--space)}
.tabpanel{padding-top:clamp(20px,3vw,36px);animation:panel-in .18s var(--ease)}
.tabpanel[hidden]{display:none}
@keyframes panel-in{from{opacity:0}to{opacity:1}}

.acc{margin-bottom:14px;background:var(--deep);border:var(--line)}
.acc__summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;
  font-size:17px;font-weight:700;
  cursor:pointer;
  list-style:none;
}
.acc__summary::-webkit-details-marker{display:none}
.acc__summary::after{content:"+";font-family:var(--font-mono);font-weight:700;color:var(--sun)}
.acc[open] .acc__summary{border-bottom:var(--line)}
.acc[open] .acc__summary::after{content:"−"}
.acc__body{padding:16px 20px;font-size:16px;color:var(--slate)}

.js [data-reveal]{opacity:0;transform:translateY(16px)}
.js [data-reveal].is-visible{opacity:1;transform:none;transition:opacity .42s var(--ease),transform .42s var(--ease)}

/* ---------- 7. 光轨头部 ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:80}
.rail{
  position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  height:var(--bar-h);
  padding:0 16px;
  background:var(--space);
  border-bottom:2px solid var(--edge);
}

.rail__brand{display:flex;align-items:center;gap:10px;min-width:0}
.rail__brand-link{font-size:18px;font-weight:900;letter-spacing:.05em;color:var(--halo);white-space:nowrap}
.rail__brand-link:hover{color:var(--sun)}
.rail__brand-sub{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--sun);white-space:nowrap}

.rail__toggle{
  display:inline-flex;align-items:center;gap:10px;
  padding:9px 12px;
  background:var(--deep);
  border:2px solid var(--edge);
  color:var(--halo);
  font-size:13px;font-weight:700;letter-spacing:.08em;
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.rail__toggle:hover{border-color:var(--sun);color:var(--sun)}
.rail__toggle[aria-expanded="true"]{border-color:var(--sun);color:var(--sun)}
.rail__toggle-lines{position:relative;display:block;width:22px;height:14px}
.rail__toggle-line{position:absolute;left:0;width:22px;height:2px;background:currentColor;transition:transform .2s var(--ease)}
.rail__toggle-line:first-child{top:3px}
.rail__toggle-line:last-child{top:11px}
.rail__toggle[aria-expanded="true"] .rail__toggle-line:first-child{transform:translateY(4px) rotate(45deg)}
.rail__toggle[aria-expanded="true"] .rail__toggle-line:last-child{transform:translateY(-4px) rotate(-45deg)}

.rail__nav{display:flex;flex-direction:column}
.rail__list{display:flex;flex-direction:column;gap:2px;width:100%}
.rail__item{width:100%}
.rail__link{
  display:grid;grid-template-columns:auto 1fr;align-items:center;gap:14px;
  padding:14px 10px;
  border-bottom:2px solid var(--edge);
  color:var(--halo);
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.rail__index{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--slate)}
.rail__label{font-size:17px;font-weight:700;letter-spacing:.06em}
.rail__note{display:none}
.rail__link:hover .rail__label,
.rail__link:focus-visible .rail__label{color:var(--sun)}
.rail__link[aria-current="page"]{border-left:4px solid var(--sun);padding-left:6px}
.rail__link[aria-current="page"] .rail__label,
.rail__link[aria-current="page"] .rail__index{color:var(--sun)}

.rail__foot{display:flex;flex-direction:column;gap:10px;width:100%;margin-top:auto;padding-top:18px;border-top:2px solid var(--edge)}
.rail__cta{
  display:block;
  padding:13px 12px;
  background:var(--sun);
  border:2px solid var(--sun);
  color:var(--space);
  text-align:center;
  font-size:15px;font-weight:800;letter-spacing:.04em;white-space:nowrap;
  transition:background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease);
}
.rail__cta:hover{background:var(--amber);border-color:var(--amber)}
.rail__cta--ghost{background:transparent;border-color:var(--edge);color:var(--halo)}
.rail__cta--ghost:hover{background:rgba(255,138,24,.1);border-color:var(--sun);color:var(--sun)}

.rail__progress{position:absolute;background:rgba(46,55,96,.72);pointer-events:none}
.rail__progress::after{content:"";position:absolute}

.nav-scrim{
  position:fixed;inset:0;z-index:70;
  background:radial-gradient(60% 50% at 26% 16%, rgba(255,138,24,.18), transparent 62%), rgba(11,16,32,.8);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .24s var(--ease),visibility .24s var(--ease);
}

/* 移动端：抽屉 + 底部进度条 */
@media (max-width:1023px){
  .rail__nav{
    position:fixed;
    top:var(--bar-h);left:0;bottom:0;
    z-index:90;
    display:flex;flex-direction:column;
    width:min(320px,84vw);
    padding:20px 20px 24px;
    overflow-y:auto;
    background:var(--deep);
    border-right:2px solid var(--edge);
    box-shadow:10px 0 0 0 rgba(255,138,24,.2);
    transform:translateX(-102%);
    transition:transform .28s var(--ease);
  }
  .rail__nav[data-open]{transform:translateX(0)}
  .nav-scrim[data-open]{opacity:1;visibility:visible;pointer-events:auto}
  body.nav-open{overflow:hidden}
  .rail__progress{left:0;right:0;bottom:0;height:3px}
  .rail__progress::after{
    left:0;top:0;height:100%;
    width:calc(var(--scroll-progress) * 100%);
    background:linear-gradient(90deg,var(--dawn),var(--sun));
  }
}

/* 桌面端：88px 竖向光轨 */
@media (min-width:1024px){
  .site-header{right:auto;bottom:0;width:var(--rail-w)}
  .rail{
    flex-direction:column;
    align-items:center;
    justify-content:flex-start;
    gap:16px;
    height:100%;
    padding:20px 4px 22px;
    border-bottom:0;
    border-right:2px solid var(--edge);
  }
  .rail__brand{flex-direction:column;gap:12px}
  .rail__brand-link{writing-mode:vertical-rl;font-size:18px;letter-spacing:.16em}
  .rail__brand-sub{writing-mode:vertical-rl;font-size:11px;letter-spacing:.22em}
  .rail__toggle{display:none}

  .rail__nav{flex:1 1 auto;min-height:0;width:100%;gap:14px}
  .rail__list{align-items:center;gap:4px}
  .rail__item{display:flex;justify-content:center}
  .rail__link{
    position:relative;
    display:flex;flex-direction:column;align-items:center;gap:4px;
    padding:9px 4px;
    border-bottom:0;
  }
  .rail__link::before{
    content:"";
    position:absolute;left:2px;top:50%;
    width:8px;height:8px;border-radius:50%;
    background:var(--sun);
    opacity:0;
    transform:translateY(-50%) scale(.4);
    transition:opacity .16s var(--ease),transform .16s var(--ease);
  }
  .rail__link:hover::before,
  .rail__link[aria-current="page"]::before{opacity:1;transform:translateY(-50%) scale(1)}
  .rail__link[aria-current="page"]{border-left:0;padding-left:4px}
  .rail__index{font-size:10px;opacity:.62}
  .rail__label{writing-mode:vertical-rl;font-size:14px;letter-spacing:.14em;color:inherit}
  .rail__link:hover .rail__index{color:var(--sun);opacity:1}
  .rail__note{
    display:block;
    position:absolute;left:calc(100% + 8px);top:50%;
    padding:5px 10px;
    background:var(--deep);
    border:2px solid var(--edge);
    color:var(--slate);
    font-size:12px;letter-spacing:.06em;white-space:nowrap;
    opacity:0;visibility:hidden;
    transform:translate(-8px,-50%);
    pointer-events:none;
    transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s var(--ease);
    z-index:6;
  }
  .rail__link:hover .rail__note,
  .rail__link:focus-visible .rail__note{opacity:1;visibility:visible;transform:translate(0,-50%)}

  .rail__foot{align-items:center;gap:8px;padding-top:16px}
  .rail__cta{padding:9px 2px;font-size:11px;letter-spacing:0}

  .rail__progress{top:0;bottom:0;right:0;width:3px}
  .rail__progress::after{
    left:50%;top:calc(var(--scroll-progress) * 100%);
    width:11px;height:11px;border-radius:50%;
    background:var(--sun);
    box-shadow:0 0 14px 3px rgba(255,138,24,.55);
    transform:translate(-50%,-50%);
  }
}

@media (min-width:1024px) and (max-height:900px){
  .rail{padding:14px 4px 16px;gap:12px}
  .rail__brand-sub{display:none}
  .rail__link{padding:6px 4px}
  .rail__nav{gap:10px}
}
@media (min-width:1024px) and (max-height:780px){
  .rail__cta--ghost{display:none}
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,10vw,140px);
  background:var(--space);
  border-top:2px solid var(--edge);
  color:var(--halo);
}
.footer__beam{
  height:4px;
  background:linear-gradient(90deg,var(--sun),rgba(255,93,122,.55) 46%,rgba(255,247,236,0) 100%);
}
.footer__inner{
  display:grid;
  gap:clamp(28px,4vw,52px);
  max-width:var(--content);
  margin-inline:auto;
  padding:clamp(40px,6vw,72px) 20px clamp(24px,3vw,40px);
}
.footer__logo{font-size:clamp(22px,2.6vw,30px);font-weight:900;letter-spacing:.02em}
.footer__tagline{margin-top:10px;font-family:var(--font-mono);font-size:13px;letter-spacing:.14em;color:var(--sun)}
.footer__icp{margin-top:16px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--slate)}

.footer__cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:clamp(20px,3vw,40px)}
.footer__col-title{margin-bottom:14px;font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--slate)}
.footer__links{display:flex;flex-direction:column;gap:10px}
.footer__link{
  display:inline-block;
  padding-left:10px;
  border-left:2px solid transparent;
  font-size:16px;color:var(--halo);
  transition:border-color .16s var(--ease),color .16s var(--ease),padding-left .16s var(--ease);
}
.footer__link:hover{border-left-color:var(--edge);color:var(--amber);padding-left:14px}

.footer__contact{grid-column:1 / -1;padding-top:clamp(20px,3vw,32px);border-top:2px solid var(--edge)}
.footer__contact-title{margin-bottom:14px;font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--slate)}
.footer__contact-list{display:grid;gap:0}
.footer__contact-item{
  display:grid;grid-template-columns:minmax(0,1fr) auto;
  gap:6px 14px;align-items:center;
  padding:12px 0;
  border-bottom:1px dashed rgba(46,55,96,.9);
}
.footer__contact-item:last-child{border-bottom:0}
.footer__contact-key{grid-column:1 / -1;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--slate)}
.footer__contact-val{font-size:16px;color:var(--halo);word-break:break-all}
.copy-btn{
  justify-self:start;
  padding:6px 12px;
  border:2px solid var(--edge);
  background:transparent;
  color:var(--amber);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  transition:border-color .16s var(--ease),color .16s var(--ease),background-color .16s var(--ease);
}
.copy-btn:hover{border-color:var(--sun);color:var(--sun)}
.copy-btn.is-copied{background:var(--mint);border-color:var(--mint);color:var(--space)}

.footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  max-width:var(--content);
  margin-inline:auto;
  padding:18px 20px 32px;
  border-top:2px solid var(--edge);
  font-size:13px;color:var(--slate);
}
.footer__copy{font-family:var(--font-mono);letter-spacing:.06em}
.footer__note{max-width:52ch;font-size:13px;line-height:1.7}

@media (min-width:768px){
  .footer__inner{grid-template-columns:1fr 1fr}
  .footer__contact-item{grid-template-columns:120px minmax(0,1fr) auto}
  .footer__contact-key{grid-column:auto}
}
@media (min-width:1024px){
  .footer__inner{grid-template-columns:minmax(220px,1.1fr) minmax(0,2fr)}
}

/* ---------- 9. 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;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .halo{animation:none}
}