/* ========================================================
   /assets/site.css — 九博游艺共享层
   框架式导航 · 档案卡 · 双色语义（青=工具/账户，琥珀=活动）
   ======================================================== */

/* 1. 变量 */
:root{
  --ink:#071325;
  --surface-1:#0D1E38;
  --surface-2:#13294A;
  --white:#E9F2F9;
  --muted:#9DB2CB;
  --violet:#7A6E96;
  --cyan:#2FE3D6;
  --cyan-dark:#17A79F;
  --amber:#F5A94B;
  --amber-2:#FF7A3D;
  --amber-pale:#FFF1DC;
  --on-amber:#1A1206;
  --line:rgba(122,110,150,.34);
  --line-strong:rgba(122,110,150,.62);
  --rail:236px;
  --radius:14px;
  --radius-sm:10px;
  --font-display:"Source Han Sans SC","Source Han Sans CN","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-text:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --shadow-card:0 22px 46px -30px rgba(0,0,0,.92);
  --shadow-cyan:0 14px 34px -22px rgba(47,227,214,.85);
  --progress:0;
}

/* 2. reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:clip}
body{
  margin:0;
  min-height:100vh;
  overflow-x:clip;
  padding-left:var(--rail);
  background:var(--ink);
  color:var(--white);
  font-family:var(--font-text);
  font-size:17px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{font-family:var(--font-display);font-weight:800;line-height:1.1;letter-spacing:-.02em;margin:0;color:var(--white)}
p{margin:0 0 1em}
a{color:var(--cyan);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#8bf7ef}
ul,ol{margin:0;padding:0}
img{display:block;max-width:100%;height:auto}
button{font:inherit}
hr{border:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
::-moz-focus-inner{border:0}
[id]{scroll-margin-top:24px}
#main-content{display:block}

/* 3. 通用版式原子 */
.page-shell{
  width:100%;
  max-width:1180px;
  margin-inline:auto;
  padding:clamp(22px,3vw,44px) clamp(16px,3.2vw,44px) clamp(48px,6vw,88px);
}
.lede{
  max-width:36em;
  margin:0;
  font-size:clamp(16px,1.6vw,18.5px);
  line-height:1.9;
  color:var(--muted);
}
.prose{max-width:34em}
.prose p{margin:0 0 1.1em;color:var(--muted);line-height:1.9}
.prose strong{color:var(--white)}
.prose h2,.prose h3{margin:1.6em 0 .6em;font-size:clamp(20px,2.2vw,26px)}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.2em;color:var(--muted)}
.prose li{margin:.35em 0}
.section-head{display:grid;gap:10px;margin:0 0 clamp(18px,2.4vw,28px);max-width:44em}
.section-head__title{font-size:clamp(22px,2.6vw,30px);line-height:1.25;letter-spacing:-.02em}
.section-head__desc{margin:0;font-size:15.5px;line-height:1.8;color:var(--muted)}
.rule{height:1px;border:0;margin:clamp(20px,2.6vw,32px) 0;background:linear-gradient(90deg,var(--line-strong),rgba(122,110,150,0))}
.stack{display:grid;gap:clamp(14px,1.8vw,24px)}
.grid{display:grid;gap:clamp(14px,1.8vw,24px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* 4. 等宽标签与徽标 */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.75}
.eyebrow--amber{color:var(--amber)}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(19,41,74,.65);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.08em;
  text-transform:uppercase;
  line-height:1.6;
}
.tag--amber{border-color:transparent;background:linear-gradient(100deg,var(--amber),var(--amber-2));color:var(--on-amber);font-weight:700}
.tag--cyan{border-color:rgba(47,227,214,.5);background:rgba(47,227,214,.09);color:var(--cyan)}

/* 5. 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:12px 20px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-text);
  font-size:15px;
  font-weight:700;
  line-height:1.4;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .22s ease-out,color .22s ease-out,border-color .22s ease-out,transform .22s ease-out,box-shadow .22s ease-out;
}
.btn--amber{background:linear-gradient(100deg,var(--amber),var(--amber-2));color:var(--on-amber);box-shadow:0 12px 28px -20px rgba(245,169,75,.95)}
.btn--amber:hover{color:var(--on-amber);transform:translateY(-2px);box-shadow:0 16px 32px -18px rgba(245,169,75,.95)}
.btn--cyan{background:var(--cyan);color:#04121f}
.btn--cyan:hover{background:#6cf3ea;color:#04121f;transform:translateY(-2px)}
.btn--ghost{border-color:var(--line-strong);background:transparent;color:var(--white)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* 6. 档案卡 */
.card{
  position:relative;
  isolation:isolate;
  min-width:0;
  padding:clamp(18px,2.2vw,26px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface-1);
  box-shadow:var(--shadow-card);
}
.card::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  border-radius:inherit;
  box-shadow:inset 0 1px 0 rgba(233,242,249,.07);
  pointer-events:none;
}
.card--cyan{border-color:rgba(47,227,214,.36);background:linear-gradient(180deg,rgba(47,227,214,.07),transparent 48%),var(--surface-1)}
.card--amber{border-color:rgba(245,169,75,.4);background:linear-gradient(180deg,rgba(245,169,75,.09),transparent 48%),var(--surface-1)}
.card--pale{border-color:rgba(245,169,75,.6);background:var(--amber-pale);color:var(--on-amber)}
.card--pale h2,.card--pale h3,.card--pale h4{color:var(--on-amber)}

/* 7. 图片 / 视觉块容器（页面阶段投放） */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  width:100%;
  aspect-ratio:16/9;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 140% at 12% 0%,rgba(47,227,214,.22),transparent 56%),
    radial-gradient(90% 120% at 100% 100%,rgba(245,169,75,.2),transparent 62%),
    linear-gradient(160deg,var(--surface-1),var(--surface-2));
}
.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__caption{
  position:absolute;
  left:12px;
  bottom:12px;
  z-index:2;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(7,19,37,.78);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
}

/* 8. 面包屑 */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0 0 clamp(16px,2vw,24px);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--muted);
}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--cyan)}
.breadcrumbs__sep{color:var(--violet)}

/* 9. 头部：框架式索引栏 */
.skip-link{
  position:fixed;
  left:50%;
  top:0;
  z-index:200;
  transform:translate(-50%,-160%);
  padding:12px 22px;
  border-radius:0 0 12px 12px;
  background:var(--cyan);
  color:#04121f;
  font-size:15px;
  font-weight:700;
  text-decoration:none;
  transition:transform .2s ease-out;
}
.skip-link:focus{transform:translate(-50%,0);color:#04121f}

.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail);
  z-index:80;
  display:flex;
  flex-direction:column;
  background:linear-gradient(180deg,var(--surface-1) 0%,#08172b 58%,var(--ink) 100%);
  border-right:1px solid var(--line);
}
.site-header__inner{
  display:flex;
  flex-direction:column;
  gap:20px;
  height:100%;
  padding:24px 18px 20px;
  overflow-y:auto;
  scrollbar-width:thin;
  scrollbar-color:var(--violet) transparent;
}
.site-header__inner::-webkit-scrollbar{width:4px}
.site-header__inner::-webkit-scrollbar-thumb{background:var(--violet);border-radius:4px}

.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--white);text-decoration:none}
.brand__mark{
  display:grid;
  place-items:center;
  flex:0 0 auto;
  width:44px;
  height:44px;
  border-radius:13px;
  background:linear-gradient(150deg,var(--cyan) 8%,var(--cyan-dark) 92%);
  color:#04121f;
  font-family:var(--font-display);
  font-size:22px;
  font-weight:900;
  letter-spacing:-.05em;
  box-shadow:var(--shadow-cyan),inset 0 0 0 1px rgba(233,242,249,.28);
}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{font-family:var(--font-display);font-size:19px;font-weight:900;line-height:1.25;letter-spacing:-.01em;color:var(--white)}
.brand__tag{font-family:var(--font-mono);font-size:10.5px;line-height:1.4;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:8px 14px 8px 12px;
  border:1px solid rgba(47,227,214,.42);
  border-radius:999px;
  background:rgba(19,41,74,.72);
  color:var(--white);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  cursor:pointer;
  transition:background-color .22s ease-out,border-color .22s ease-out;
}
.nav-toggle:hover{background:var(--surface-2);border-color:var(--cyan)}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:var(--cyan);transition:transform .22s ease-out,opacity .22s ease-out}
.site-header[data-open] .nav-toggle{border-color:var(--cyan);background:rgba(47,227,214,.14)}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.site-nav{display:flex;flex-direction:column;gap:14px;flex:1 1 auto;min-height:0}
.site-nav__label{margin:0;font-family:var(--font-mono);font-size:10px;font-weight:500;letter-spacing:.24em;text-transform:uppercase;color:var(--violet)}
.site-nav__list{list-style:none;margin:0;padding:0;display:grid;gap:3px}
.site-nav__item{margin:0}
.site-nav__link{
  display:grid;
  grid-template-columns:24px minmax(0,1fr);
  align-items:center;
  gap:6px;
  padding:9px 10px;
  border-radius:var(--radius-sm);
  box-shadow:inset 2px 0 0 transparent;
  color:var(--muted);
  font-size:15px;
  font-weight:500;
  line-height:1.5;
  text-decoration:none;
  transition:color .22s ease-out,background-color .22s ease-out,box-shadow .22s ease-out;
}
.site-nav__link:hover{color:var(--white);background:var(--surface-2);box-shadow:inset 2px 0 0 var(--cyan)}
.site-nav__num{font-family:var(--font-mono);font-size:10.5px;font-weight:500;letter-spacing:.08em;color:var(--violet);transition:color .22s ease-out}
.site-nav__text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.site-nav__link[aria-current="page"]{
  background:linear-gradient(100deg,var(--cyan),#6cf3ea);
  color:#04121f;
  font-weight:700;
  box-shadow:inset 2px 0 0 rgba(4,18,31,.28);
}
.site-nav__link[aria-current="page"] .site-nav__num{color:rgba(4,18,31,.58)}

.site-nav__meta{display:grid;gap:10px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line)}
.site-nav__cta{width:100%;font-size:14px;padding:11px 16px}
.quick-entry{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  padding:10px 14px;
  border:1px solid rgba(47,227,214,.45);
  border-radius:var(--radius-sm);
  background:rgba(47,227,214,.07);
  color:var(--cyan);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  transition:background-color .22s ease-out,border-color .22s ease-out,color .22s ease-out;
}
.quick-entry:hover{background:rgba(47,227,214,.16);border-color:var(--cyan);color:#9ffaf2}

.rail-note{
  flex:0 0 auto;
  margin:4px 0 0 2px;
  max-height:170px;
  overflow:hidden;
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:var(--violet);
}

/* 10. 阅读进度条 */
.site-progress{
  position:absolute;
  top:0;
  right:-1px;
  width:3px;
  height:100%;
  overflow:hidden;
  background:rgba(157,178,203,.14);
  pointer-events:none;
}
.site-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleY(var(--progress,0));
  transform-origin:top center;
  background:linear-gradient(180deg,var(--amber),var(--cyan));
  transition:transform .12s linear;
}

/* 11. 回到顶部 */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:90;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  border:1px solid rgba(47,227,214,.45);
  border-radius:50%;
  background:rgba(13,30,56,.94);
  color:var(--cyan);
  font-size:17px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s ease-out,transform .24s ease-out,visibility .24s ease-out,background-color .2s ease-out,border-color .2s ease-out;
}
.to-top:hover{background:var(--surface-2);border-color:var(--cyan)}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}

/* 12. 页脚 */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,var(--surface-1) 0%,var(--ink) 72%);
}
.site-footer__inner{max-width:1180px;margin-inline:auto;padding:clamp(34px,4.4vw,60px) clamp(16px,3.2vw,44px) 26px}
.site-footer__top{
  display:grid;
  gap:clamp(24px,3vw,40px);
  grid-template-columns:minmax(0,1.1fr) minmax(0,1.7fr) minmax(0,1.1fr);
  align-items:start;
}
.site-footer__brand{min-width:0}
.site-footer__mark{margin:0 0 6px;font-family:var(--font-display);font-size:26px;font-weight:900;line-height:1.2;letter-spacing:-.03em;color:var(--white)}
.site-footer__tag{margin:0 0 14px;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan)}
.site-footer__note{margin:0 0 4px;font-size:13.5px;line-height:1.7;color:var(--muted)}
.site-footer__cols{display:grid;gap:22px;grid-template-columns:repeat(3,minmax(0,1fr))}
.site-footer__contact{min-width:0}
.site-footer__contact .site-footer__note{margin-top:12px}
.footer-col{min-width:0}
.footer-col__title{margin:0 0 12px;font-family:var(--font-mono);font-size:10.5px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--violet)}
.footer-col__list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.footer-col__link{color:var(--muted);font-size:14.5px;text-decoration:none;transition:color .2s ease-out}
.footer-col__link:hover{color:var(--cyan)}
.footer-col__item{display:grid;gap:2px;font-size:13.5px;line-height:1.6}
.footer-col__kicker{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--violet)}
.footer-col__value{color:var(--white);word-break:break-word}
.site-footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  margin-top:clamp(26px,3vw,40px);
  padding-top:18px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--muted);
}
.site-footer__legal,.site-footer__copy{margin:0}

/* 13. 平板 */
@media (max-width:1180px){
  .site-footer__top{grid-template-columns:minmax(0,1fr) minmax(0,1.5fr)}
  .site-footer__contact{grid-column:1 / -1}
}
@media (max-width:960px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* 14. 移动端：顶栏 + 下拉标签面板 */
@media (max-width:1023px){
  body{padding-left:0}
  .site-header{
    position:sticky;
    top:0;
    left:auto;
    right:auto;
    bottom:auto;
    width:100%;
    height:auto;
    flex-direction:row;
    border-right:0;
    border-bottom:1px solid var(--line);
    background:#071325;
  }
  .site-header.is-scrolled{box-shadow:0 18px 34px -28px #000}
  .site-header__inner{
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    height:auto;
    padding:10px 16px;
    overflow:visible;
  }
  .brand__mark{width:36px;height:36px;border-radius:10px;font-size:18px}
  .brand__name{font-size:16px}
  .brand__tag{font-size:9.5px;letter-spacing:.12em}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    gap:16px;
    padding:18px 16px 22px;
    max-height:calc(100vh - 64px);
    overflow-y:auto;
    background:linear-gradient(180deg,var(--surface-1),var(--ink));
    border-bottom:1px solid var(--line);
    box-shadow:0 36px 60px -34px #000;
  }
  .site-header[data-open] .site-nav{display:flex}
  .site-nav__label{font-size:9.5px;letter-spacing:.2em}
  .site-nav__list{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}
  .site-nav__link{grid-template-columns:22px minmax(0,1fr);padding:11px 12px;font-size:14px}
  .site-nav__meta{grid-template-columns:1fr 1fr;margin-top:2px;padding-top:14px}
  .site-nav__cta{width:auto}
  .rail-note{display:none}
  .site-progress{top:auto;right:0;bottom:-1px;left:0;width:100%;height:3px}
  .site-progress__bar{
    transform:scaleX(var(--progress,0));
    transform-origin:left center;
    background:linear-gradient(90deg,var(--amber),var(--cyan));
  }
  .to-top{right:14px;bottom:18px;width:42px;height:42px;font-size:16px}
}

/* 15. 手机 */
@media (max-width:680px){
  body{font-size:16px}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .site-nav__meta{grid-template-columns:1fr}
  .site-footer__top{grid-template-columns:minmax(0,1fr)}
  .site-footer__cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__contact{grid-column:auto}
  .site-footer__bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .site-progress{height:2px}
}

/* 16. 降低动效 */
@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;
  }
  .to-top{transform:none}
  .site-progress__bar{transition:none}
}