/* ============================================================
   赢咖会馆 — 共享样式表 /assets/site.css
   设计语言：暗室聚光 · 切角面板 · 琥珀金刻度 · 非对称索引
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0B3B2E;
  --ink-deep:#06231B;
  --ink-lift:#124C3C;
  --amber:#D4A017;
  --amber-soft:#F0C24B;
  --coral:#E86A33;
  --paper:#F2F4F5;
  --char:#1A1A1A;
  --gray-green:#7FA99B;
  --cyan:#3ED6C0;

  --line:rgba(212,160,23,.30);
  --line-soft:rgba(127,169,155,.24);
  --on-dark:rgba(242,244,245,.86);
  --on-dark-dim:rgba(242,244,245,.64);

  --maxw:1280px;
  --gutter:clamp(20px,4vw,56px);
  --header-h:78px;
  --header-h-scrolled:62px;

  --ease:cubic-bezier(.22,.61,.36,1);
  --cut:22px;

  --font-sans:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 18px);
}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
h1,h2,h3,h4{margin:0;line-height:1.16;letter-spacing:-.01em;font-weight:800}
h1{font-size:clamp(40px,6vw,72px);font-weight:900;line-height:1.02;letter-spacing:-.02em}
h2{font-size:clamp(28px,3.6vw,44px);font-weight:900}
h3{font-size:clamp(20px,2.2vw,26px);font-weight:700}
p{margin:0}
::selection{background:var(--amber);color:var(--ink-deep)}
:focus-visible{outline:2px solid var(--amber-soft);outline-offset:3px}

/* ---------- 3. 通用工具 ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.container--narrow{max-width:860px}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.mono{font-family:var(--font-mono);font-size:.9em;letter-spacing:.04em}

.skip-link{
  position:absolute;left:var(--gutter);top:10px;z-index:140;
  transform:translateY(-220%);
  background:var(--amber);color:var(--ink-deep);
  font-size:14px;font-weight:700;letter-spacing:.04em;
  padding:10px 18px;
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:none}

.rule-ticks{
  height:10px;
  background-image:repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 12px);
}

/* ---------- 4. 头部 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  color:var(--paper);
  transition:background-color .34s var(--ease),box-shadow .34s var(--ease);
}
.site-header::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,35,27,.92) 0%,rgba(6,35,27,.55) 55%,rgba(6,35,27,0) 100%);
  transition:opacity .34s var(--ease);
}
.site-header[data-scrolled]{
  background-color:var(--ink-lift);
  box-shadow:0 1px 0 var(--line),0 12px 30px -22px rgba(0,0,0,.85);
}
.site-header[data-scrolled]::before{opacity:0}

.site-header__inner{
  position:relative;z-index:2;
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding-inline:var(--gutter);
  height:var(--header-h);
  display:flex;align-items:center;gap:clamp(14px,2.2vw,32px);
  transition:height .34s var(--ease);
}
.site-header[data-scrolled] .site-header__inner{height:var(--header-h-scrolled)}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand__bar{
  width:3px;height:26px;flex:0 0 auto;
  background:linear-gradient(180deg,var(--amber-soft),var(--coral));
}
.brand__name{font-size:20px;font-weight:900;letter-spacing:.02em;white-space:nowrap}
.brand__tag{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  color:var(--gray-green);padding-left:10px;border-left:1px solid var(--line-soft);
}
.brand:hover .brand__name{color:var(--amber-soft)}

.site-nav{flex:1 1 auto;display:flex;justify-content:center}
.site-nav__list{display:flex;align-items:center;gap:clamp(12px,1.9vw,28px);list-style:none}
.site-nav__item{list-style:none}
.site-nav__link{
  position:relative;display:inline-block;padding:8px 2px;
  font-size:15px;font-weight:500;letter-spacing:.04em;
  color:var(--on-dark);white-space:nowrap;
  transition:color .22s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:100%;bottom:2px;height:1px;
  background:var(--amber);transition:right .28s var(--ease);
}
.site-nav__link:hover{color:var(--amber-soft)}
.site-nav__link:hover::after{right:0}
.site-nav__link[aria-current="page"]{color:var(--amber-soft);font-weight:700}
.site-nav__link[aria-current="page"]::after{right:0}

.header-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search{
  display:flex;align-items:center;gap:8px;
  padding:7px 12px;
  background:rgba(6,35,27,.55);
  border:1px solid var(--line-soft);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.search:focus-within{
  border-color:var(--amber);
  box-shadow:0 0 0 1px rgba(212,160,23,.45);
}
.search__label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--gray-green);white-space:nowrap;
}
.search__input{
  width:clamp(108px,15vw,190px);
  background:transparent;border:0;outline:none;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.03em;
  color:var(--paper);
  -webkit-appearance:none;appearance:none;
}
.search__input::placeholder{color:rgba(127,169,155,.78)}
.search__input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}

.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;
  font-size:14px;font-weight:700;letter-spacing:.05em;
  border:1px solid transparent;background:transparent;
  cursor:pointer;white-space:nowrap;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn--accent{background:var(--coral);color:var(--ink-deep)}
.btn--accent:hover{background:#F07E4C;transform:translateY(-1px)}
.btn--ghost{border-color:var(--line);color:var(--paper)}
.btn--ghost:hover{border-color:var(--amber);color:var(--amber-soft)}
.btn--solid{background:var(--amber);color:var(--ink-deep)}
.btn--solid:hover{background:var(--amber-soft)}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  background:transparent;border:1px solid var(--line-soft);
  padding:8px 12px;cursor:pointer;
  font-size:13px;letter-spacing:.08em;color:var(--paper);
}
.nav-toggle[aria-expanded="true"]{border-color:var(--amber);color:var(--amber-soft)}
.nav-toggle__bars{
  position:relative;display:block;width:18px;height:2px;background:currentColor;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
  transition:transform .24s var(--ease),top .24s var(--ease);
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle__label{font-family:var(--font-mono);font-size:11.5px}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(127,169,155,.18);
}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--amber),var(--coral));
  transform:scaleX(0);transform-origin:left center;
}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-deep);
  color:var(--on-dark-dim);
  padding:clamp(48px,7vw,96px) 0 34px;
  border-top:1px solid var(--line-soft);
}
.footer-band{
  position:absolute;top:0;left:0;right:0;height:10px;
  background-image:repeating-linear-gradient(105deg,rgba(212,160,23,.55) 0 1px,transparent 1px 16px);
}
.footer-grid{
  width:100%;max-width:var(--maxw);margin-inline:auto;
  padding-inline:var(--gutter);
  display:grid;
  grid-template-columns:1.5fr 1fr 1.3fr 1.2fr;
  gap:clamp(28px,3.4vw,56px);
}
.footer-col{min-width:0}
.footer-col--brand{border-left:1px solid var(--line-soft);padding-left:clamp(16px,2vw,26px)}
.footer-col--contact{border-left:1px solid var(--line-soft);padding-left:clamp(16px,2vw,26px)}
.footer-col--legal{border-left:1px solid var(--line-soft);padding-left:clamp(16px,2vw,26px)}

.footer-title{
  font-family:var(--font-mono);
  font-size:12px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;
  color:var(--amber);margin:0 0 18px;
}
.footer-title::before{content:"";display:inline-block;width:14px;height:1px;background:var(--amber);margin-right:8px;vertical-align:middle}

.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-size:23px;font-weight:900;letter-spacing:.02em;color:var(--paper);
}
.footer-brand__bar{
  width:4px;height:24px;
  background:linear-gradient(180deg,var(--amber-soft),var(--coral));
}
.footer-lede{margin-top:16px;font-size:15px;line-height:1.8;color:var(--on-dark-dim);max-width:30em}
.footer-meta{
  margin-top:16px;font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.16em;color:var(--gray-green);
}

.footer-list{list-style:none;display:grid;gap:11px;font-size:14.5px;line-height:1.7}
.footer-list a{color:var(--on-dark);transition:color .2s var(--ease)}
.footer-list a:hover{color:var(--amber-soft)}
.footer-link-strong{
  display:inline-block;margin-top:4px;
  color:var(--amber-soft);font-weight:700;
  border-bottom:1px solid var(--line);padding-bottom:2px;
}
.footer-link-strong::after{content:" →"}

.footer-legal{
  margin-top:20px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.1em;color:var(--gray-green);
}
.footer-copy{margin-top:10px;font-size:12.5px;color:rgba(242,244,245,.5)}

/* ---------- 6. 版式组件 ---------- */
.section{padding-block:clamp(56px,8vw,120px)}
.section--tight{padding-block:clamp(30px,4vw,58px)}
.section--paper{background:var(--paper);color:var(--char)}
.section--paper .lede,
.section--paper .prose{color:#3A4145}
.section--paper .index-label{color:#8A6A10}
.section--paper .index-label::before{background:#8A6A10}
.section--paper .rule-ticks{background-image:repeating-linear-gradient(90deg,rgba(26,26,26,.22) 0 1px,transparent 1px 12px)}
.section--paper .panel{background:#fff;border-color:rgba(26,26,26,.14)}
.section--paper .panel--cut{background:linear-gradient(180deg,#fff,#F7F8F8);box-shadow:inset 0 0 0 1px rgba(26,26,26,.14)}
.section--paper .tag{border-color:rgba(138,106,16,.35);color:#7A5C0D;background:rgba(212,160,23,.12)}
.section--paper .breadcrumbs,
.section--paper .breadcrumbs a{color:#5C6367}

.index-label{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--amber);
}
.index-label::before{content:"";width:22px;height:1px;background:currentColor}

.lede{
  margin-top:18px;
  font-size:clamp(17px,1.45vw,20px);line-height:1.82;
  color:var(--on-dark);max-width:32em;
}
.prose{max-width:34em;font-size:17px;line-height:1.8;color:var(--on-dark)}
.prose p+p{margin-top:1.1em}
.prose strong{color:var(--amber-soft);font-weight:700}
.prose a{color:var(--amber-soft);border-bottom:1px solid var(--line)}

.grid{display:grid;gap:clamp(18px,2vw,28px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

.panel{
  position:relative;
  background:var(--ink-lift);
  border:1px solid var(--line-soft);
  padding:clamp(20px,2.6vw,32px);
}
.panel--cut{
  border:0;
  background:linear-gradient(180deg,rgba(18,76,60,.96),rgba(6,35,27,.96));
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
  box-shadow:inset 0 0 0 1px rgba(212,160,23,.22);
}
.panel__title{margin:0 0 12px;font-size:clamp(20px,2.2vw,26px);font-weight:800}

.tag{
  display:inline-block;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;
  padding:4px 10px;border:1px solid var(--line);
  color:var(--amber-soft);background:rgba(212,160,23,.08);
}
.tag--cyan{border-color:rgba(62,214,192,.42);color:var(--cyan);background:rgba(62,214,192,.08)}
.tag--coral{border-color:rgba(232,106,51,.45);color:#F1916A;background:rgba(232,106,51,.1)}

.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:0;
  list-style:none;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--gray-green);
}
.breadcrumbs li{display:flex;align-items:center}
.breadcrumbs li+li::before{content:"/";margin:0 10px;color:rgba(127,169,155,.5)}
.breadcrumbs a{color:var(--gray-green);transition:color .2s var(--ease)}
.breadcrumbs a:hover{color:var(--amber-soft)}

.page-top{padding-top:calc(var(--header-h) + clamp(28px,5vw,64px))}

/* ---------- 7. 图片容器基础规则 ---------- */
.media{
  position:relative;overflow:hidden;
  background:linear-gradient(150deg,#0D3529 0%,var(--ink-deep) 100%);
  border:1px solid var(--line-soft);
}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(212,160,23,.12) 0 1px,transparent 1px 18px);
}
.media--cut{
  border:0;
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}
.media--placeholder{min-height:clamp(180px,26vw,320px)}
.media__img{width:100%;height:100%;aspect-ratio:16/9;object-fit:cover}
.media--wide .media__img{aspect-ratio:21/9}
.media--portrait .media__img{aspect-ratio:3/4}
.media__caption{
  margin-top:10px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.06em;color:var(--gray-green);
}
.figure-frame{padding:10px;border:1px solid var(--line);background:rgba(6,35,27,.4)}

/* ---------- 8. 筛选与显现 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.filter-chip{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  padding:7px 14px;background:transparent;border:1px solid var(--line-soft);
  color:var(--on-dark-dim);cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.filter-chip:hover{border-color:var(--amber);color:var(--amber-soft)}
.filter-chip[aria-pressed="true"]{background:var(--amber);border-color:var(--amber);color:var(--ink-deep);font-weight:700}

[data-filter-item].is-hidden{display:none}
[data-filter-item].is-hit{outline:1px solid var(--cyan);outline-offset:3px}

.reveal{opacity:0;transform:translateY(14px);transition:opacity .38s var(--ease),transform .38s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1040px){
  .site-nav{
    position:fixed;top:0;left:0;right:0;z-index:1;
    display:block;
    max-height:100dvh;overflow-y:auto;
    padding:calc(var(--header-h) + 14px) var(--gutter) 30px;
    background:linear-gradient(180deg,var(--ink-deep) 0%,var(--ink) 100%);
    border-bottom:1px solid var(--line);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s linear;
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid rgba(127,169,155,.18)}
  .site-nav__link{display:block;padding:15px 2px;font-size:18px;font-weight:600}
  .site-nav__link::after{display:none}

  .site-header__inner{justify-content:space-between;gap:12px}
  .nav-toggle{display:inline-flex}
  .header-tools{margin-left:auto}

  .grid--split{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-col--legal{border-left:0;padding-left:0}
}

@media (max-width:760px){
  body{font-size:16px}
  .brand__tag{display:none}
  .search__label{display:none}
  .search__input{width:104px}
  .footer-grid{grid-template-columns:1fr}
  .footer-col--brand,
  .footer-col--contact{border-left:0;padding-left:0}
  .footer-title{margin-bottom:14px}
}

@media (max-width:520px){
  :root{--header-h:66px;--header-h-scrolled:58px;--cut:16px}
  .brand__name{font-size:17px}
  .brand__bar{height:22px}
  .search{padding:6px 9px}
  .search__input{width:82px;font-size:12px}
  .btn{padding:8px 12px;font-size:13px}
  .nav-toggle__label{display:none}
}

/* ---------- 10. 动效偏好 ---------- */
@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{opacity:1;transform:none}
}