/* =========================================================
   /assets/site.css — 幸运28中心 共享样式
   海河深靛 · 码头铁灰 · 铜金细线 · 津门暖橙
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
table{border-collapse:collapse}

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#0B1B2B;
  --iron:#1E2A33;
  --haze:#334654;
  --copper:#C79A4B;
  --brick:#B24A3A;
  --amber:#E08A3C;
  --paper:#F2EAD9;
  --steel:#9FB0BC;
  --abyss:#05101A;
  --mist:#6E8798;

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

  --wrap:1240px;
  --gutter:clamp(18px,4vw,56px);
  --radius-lg:32px;
  --radius-md:20px;
  --radius-sm:12px;
  --radius-pill:999px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --line:1px solid rgba(199,154,75,.24);
  color-scheme:dark;
}

/* ---------- 3. Base ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1180px 620px at 78% -10%, rgba(224,138,60,.10), transparent 62%),
    radial-gradient(900px 540px at 4% 2%, rgba(199,154,75,.07), transparent 60%);
  background-repeat:no-repeat;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,17px);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.018em;
  line-height:1.12;
}
p{text-wrap:pretty}
::selection{background:rgba(224,138,60,.32);color:var(--paper)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ---------- 4. 可访问性 ---------- */
.skip-link{
  position:fixed;
  top:14px;left:50%;
  transform:translate(-50%,-190%);
  z-index:400;
  padding:12px 24px;
  border-radius:var(--radius-pill);
  background:var(--amber);
  color:#1A0F04;
  font-size:14px;font-weight:700;letter-spacing:.08em;
  text-decoration:none;
  box-shadow:0 12px 30px -12px rgba(5,16,26,.9);
  transition:transform .22s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translate(-50%,0);outline:2px solid var(--paper);outline-offset:3px}

:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
  box-shadow:0 0 0 5px var(--abyss);
  border-radius:6px;
}

/* ---------- 5. 布局外壳 ---------- */
.site-main{padding-block:clamp(24px,4vw,52px) clamp(48px,7vw,96px)}
.wrap{
  width:min(var(--wrap),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
}
.grid{display:grid;gap:clamp(18px,2.4vw,40px)}
.grid--3-9{grid-template-columns:minmax(0,3fr) minmax(0,9fr)}
.grid--4-8{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}
.grid--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}

.section{padding-block:clamp(30px,4.5vw,72px)}
.section + .section{border-top:1px solid rgba(51,70,84,.62)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.7em;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--copper);
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--copper);flex:none}
.section-title{font-size:clamp(26px,3.6vw,42px);margin:0 0 16px;color:var(--paper)}
.section-lede{max-width:60ch;margin:0;color:var(--steel)}

.prose{max-width:68ch;color:rgba(242,234,217,.86)}
.prose p{margin:0 0 1.15em}
.prose h3{font-size:clamp(19px,2vw,24px);margin:1.9em 0 .6em;color:var(--paper)}
.prose h3:first-child{margin-top:0}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.25em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4em}
.prose a{color:var(--copper);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.prose a:hover{color:var(--amber)}
.prose strong{color:var(--paper);font-weight:700}

.breadcrumb{margin:0 0 clamp(22px,3vw,38px);font-size:12px;letter-spacing:.1em;color:var(--mist)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:.6em;margin:0;padding:0;list-style:none}
.breadcrumb li{display:flex;align-items:center;gap:.6em}
.breadcrumb li + li::before{content:"/";color:var(--haze)}
.breadcrumb a{
  color:var(--steel);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.breadcrumb a:hover,.breadcrumb a:focus-visible{color:var(--copper);border-color:var(--copper)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

.rule{
  height:1px;border:0;margin:clamp(26px,4vw,52px) 0;
  background:linear-gradient(90deg,rgba(199,154,75,.65),rgba(199,154,75,0));
}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:linear-gradient(180deg,rgba(5,16,26,.97),rgba(11,27,43,.94));
  border-bottom:1px solid rgba(199,154,75,.22);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.header-bar{
  width:min(var(--wrap),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:clamp(10px,2vw,28px);
  padding-block:clamp(11px,1.4vw,18px);
}
.coord{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--mist);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.masthead{display:flex;justify-content:center;min-width:0}
.brand{
  display:flex;align-items:center;gap:clamp(8px,1.1vw,14px);
  text-decoration:none;color:inherit;min-width:0;
}
.brand-mark{
  flex:none;
  display:grid;place-items:center;
  width:clamp(34px,3vw,44px);aspect-ratio:1;
  border:1px solid rgba(199,154,75,.52);
  border-radius:14px;
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(16px,1.4vw,20px);
  color:var(--copper);
  background:radial-gradient(circle at 50% 28%,rgba(224,138,60,.20),transparent 72%);
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.brand:hover .brand-mark,.brand:focus-visible .brand-mark{border-color:var(--amber);color:var(--amber)}
.brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand-name{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(19px,2.05vw,27px);
  letter-spacing:.05em;line-height:1.12;
  color:var(--paper);white-space:nowrap;
}
.brand-tagline{
  font-size:clamp(10px,.95vw,12px);
  letter-spacing:.2em;
  color:var(--copper);
  white-space:nowrap;
}
.header-tools{
  display:flex;align-items:center;gap:10px;justify-self:end;
}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(159,176,188,.28);
  background:rgba(51,70,84,.26);
  color:var(--steel);
  font-size:12px;letter-spacing:.06em;white-space:nowrap;
}
.pill--version::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 0 3px rgba(224,138,60,.18);
  flex:none;
}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 16px;
  border:1px solid rgba(159,176,188,.32);
  border-radius:var(--radius-pill);
  background:rgba(51,70,84,.42);
  color:var(--paper);
  font-size:13px;letter-spacing:.1em;
  cursor:pointer;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--copper);background:rgba(199,154,75,.14)}
.nav-toggle-bars{display:grid;gap:3px;width:16px;flex:none}
.nav-toggle-bars i{display:block;height:2px;border-radius:2px;background:var(--copper);transition:transform .24s var(--ease),opacity .18s var(--ease)}
.nav-toggle-text{font-size:13px;letter-spacing:.12em}
.site-header[data-open] .nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars i:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 7. 导航 ---------- */
.site-nav{
  width:min(var(--wrap),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
  display:flex;align-items:center;justify-content:center;
  padding-block:0 clamp(10px,1.2vw,15px);
}
.nav-list{
  display:flex;align-items:center;justify-content:center;
  flex-wrap:wrap;
  gap:clamp(4px,1.8vw,32px);
}
.nav-item{display:block}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 2px;
  color:var(--steel);
  font-size:14px;letter-spacing:.13em;
  text-decoration:none;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;
  background:var(--copper);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .28s var(--ease),background-color .2s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--paper)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--copper);font-weight:700}
.nav-link[aria-current="page"]::after{transform:scaleX(1);height:2px;background:var(--amber)}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(51,70,84,.55);
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress i{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--copper),var(--amber) 55%,var(--brick));
}

/* ---------- 8. 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:12px 24px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:var(--font-body);font-weight:700;
  font-size:14px;letter-spacing:.05em;
  text-decoration:none;cursor:pointer;
  transition:transform .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
}
.btn--amber{
  background:var(--amber);color:#1A0F04;
  box-shadow:0 8px 24px -12px rgba(224,138,60,.95);
}
.btn--amber:hover,.btn--amber:focus-visible{background:#F09A4A;transform:translateY(-2px)}
.btn--ghost{
  background:transparent;color:var(--paper);
  border-color:rgba(199,154,75,.48);
}
.btn--ghost:hover,.btn--ghost:focus-visible{
  border-color:var(--copper);
  background:rgba(199,154,75,.12);
  transform:translateY(-2px);
}
.btn--sm{padding:9px 18px;font-size:13px;letter-spacing:.08em}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(159,176,188,.3);
  background:rgba(51,70,84,.32);
  color:var(--steel);
  font-size:12px;letter-spacing:.08em;line-height:1.6;
}
.tag--copper{border-color:rgba(199,154,75,.55);background:rgba(199,154,75,.12);color:var(--copper)}
.tag--brick{border-color:rgba(178,74,58,.62);background:rgba(178,74,58,.18);color:#E28E80}
.tag--amber{border-color:rgba(224,138,60,.55);background:rgba(224,138,60,.13);color:var(--amber)}

.link-arrow{
  display:inline-flex;align-items:center;gap:.5em;
  padding-bottom:2px;
  color:var(--copper);
  font-size:15px;font-weight:600;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.link-arrow::after{content:"→";transition:transform .22s var(--ease)}
.link-arrow:hover,.link-arrow:focus-visible{color:var(--amber);border-color:var(--amber)}
.link-arrow:hover::after,.link-arrow:focus-visible::after{transform:translateX(3px)}

.copy-btn{
  display:inline-flex;align-items:center;
  padding:3px 10px;
  border:1px solid rgba(159,176,188,.35);
  border-radius:var(--radius-pill);
  background:transparent;
  color:var(--steel);
  font-size:11px;letter-spacing:.08em;
  cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.copy-btn:hover,.copy-btn:focus-visible{color:var(--copper);border-color:var(--copper);background:rgba(199,154,75,.12)}
.copy-btn[data-copied="true"]{color:var(--amber);border-color:var(--amber);background:rgba(224,138,60,.14)}

/* ---------- 9. 内容组件 ---------- */
.card{
  background:var(--iron);
  border:1px solid rgba(51,70,84,.92);
  border-radius:var(--radius-lg);
  padding:clamp(20px,2.6vw,32px);
  transition:transform .24s var(--ease),border-color .24s var(--ease),background-color .24s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(199,154,75,.5);background:#22303A}
.card-index{
  display:block;margin-bottom:14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--copper);
}
.card-title{font-size:clamp(18px,2vw,22px);margin:0 0 8px;color:var(--paper)}
.card-text{margin:0;color:var(--steel);font-size:15px}

.media{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid rgba(51,70,84,.85);
  border-radius:var(--radius-md);
  background:
    linear-gradient(152deg,rgba(30,42,51,.98),#0E2130 58%,#12283A);
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1}
.media img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.92) contrast(1.03);
  transition:transform .5s var(--ease),filter .5s var(--ease);
}
.media:hover img{transform:scale(1.02);filter:saturate(1) brightness(1.06)}
.media__label{
  position:absolute;left:14px;bottom:14px;z-index:2;
  padding:5px 12px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(199,154,75,.42);
  background:rgba(5,16,26,.74);
  color:var(--paper);
  font-size:12px;letter-spacing:.1em;
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;
  color:var(--mist);
}

.timeline{position:relative;margin:0;padding:0}
.timeline::before{
  content:"";position:absolute;left:9px;top:8px;bottom:10px;width:1px;
  background:linear-gradient(180deg,var(--copper),rgba(51,70,84,.55));
}
.timeline__item{position:relative;padding:0 0 clamp(20px,3vw,34px) 40px}
.timeline__item::before{
  content:"";position:absolute;left:4px;top:9px;
  width:11px;height:11px;border-radius:50%;
  background:var(--ink);border:1px solid var(--copper);
}
.timeline__item:last-child{padding-bottom:0}
.timeline__date{
  display:block;margin-bottom:6px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--copper);
}
.timeline__title{font-size:clamp(17px,1.8vw,20px);margin:0 0 6px;color:var(--paper)}

.rail{
  display:flex;gap:clamp(14px,2vw,24px);
  overflow-x:auto;
  padding-bottom:14px;
  scroll-snap-type:x mandatory;
  scrollbar-color:var(--haze) transparent;
  scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:var(--haze);border-radius:99px}
.rail > *{flex:0 0 clamp(240px,32vw,360px);scroll-snap-align:start}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,7vw,104px);
  background:var(--abyss);
  border-top:1px solid rgba(199,154,75,.22);
  color:var(--steel);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:240px;
  background:radial-gradient(ellipse at 18% 0%,rgba(224,138,60,.13),transparent 62%);
  pointer-events:none;
}
.footer-inner{
  position:relative;
  width:min(var(--wrap),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
  padding-block:clamp(38px,5vw,72px) clamp(22px,3vw,36px);
  display:grid;
  grid-template-columns:1.4fr .8fr 1.15fr .8fr;
  gap:clamp(24px,3vw,48px);
}
.footer-brand{min-width:0}
.footer-mark{
  margin:0 0 10px;
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(22px,2.4vw,30px);letter-spacing:.05em;
  color:var(--paper);
}
.footer-line{margin:0 0 14px;max-width:24ch;font-size:14px;color:var(--steel)}
.footer-coord{
  margin:0;
  font-size:11px;letter-spacing:.16em;
  color:var(--mist);
}
.footer-col{min-width:0}
.footer-title{
  margin:0 0 16px;
  font-family:var(--font-mono);font-weight:500;
  font-size:12px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--copper);
}
.footer-list{display:grid;gap:10px}
.footer-list a{
  display:inline-block;
  color:var(--steel);font-size:14px;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-list a:hover,.footer-list a:focus-visible{color:var(--paper);border-color:var(--copper)}
.footer-contact-item{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:4px 8px;
  font-size:13px;
}
.footer-label{
  width:100%;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.14em;
  color:var(--mist);
}
.footer-value{color:var(--paper);font-size:13px;word-break:break-word}
.footer-bottom{
  position:relative;
  width:min(var(--wrap),calc(100% - var(--gutter) * 2));
  margin-inline:auto;
  padding-block:18px clamp(22px,3vw,32px);
  border-top:1px solid rgba(51,70,84,.82);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:8px 24px;
}
.footer-copy{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- 11. 显现 ---------- */
.reveal-init{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
  will-change:opacity,transform;
}
.reveal-init.is-visible{opacity:1;transform:none;will-change:auto}

/* ---------- 12. 响应式 ---------- */
@media (max-width:1080px){
  .footer-inner{grid-template-columns:1.2fr 1fr 1fr;gap:clamp(22px,3vw,36px)}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:1024px){
  .coord{display:none}
  .grid--3-9,.grid--4-8,.grid--5-7{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:900px){
  html{scroll-padding-top:112px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:block;
    width:100%;
    max-height:0;
    overflow:hidden;
    padding:0 var(--gutter);
    transition:max-height .34s var(--ease);
  }
  .site-header[data-open] .site-nav{
    max-height:min(72vh,560px);
    overflow-y:auto;
    padding-bottom:18px;
    border-top:1px solid rgba(199,154,75,.2);
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    flex-wrap:nowrap;
    gap:0;
    margin-top:12px;
    padding:6px 18px;
    border:1px solid rgba(51,70,84,.92);
    border-radius:26px;
    background:rgba(30,42,51,.94);
  }
  .nav-item{width:100%}
  .nav-link{
    display:flex;align-items:center;justify-content:space-between;
    width:100%;
    padding:14px 4px;
    font-size:16px;letter-spacing:.1em;
    border-bottom:1px solid rgba(51,70,84,.55);
  }
  .nav-item:last-child .nav-link{border-bottom:0}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--amber)}
}
@media (max-width:820px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:720px){
  .brand-tagline{display:none}
  .pill--version{display:none}
  .header-bar{grid-template-columns:minmax(0,1fr) auto}
  .coord{display:none}
}
@media (max-width:620px){
  .footer-inner{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-line{max-width:none}
}
@media (max-width:480px){
  .btn--sm{padding:8px 14px;font-size:12px}
  .nav-toggle-text{display:none}
  .nav-toggle{padding:9px 12px}
  .brand-name{font-size:17px}
}

/* ---------- 13. 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;
  }
  .reveal-init{opacity:1 !important;transform:none !important}
  .card:hover,.btn--amber:hover,.btn--ghost:hover,.media:hover img{transform:none !important}
}