/* ==========================================================================
   金牛娱乐 · 共享站点样式 /assets/site.css
   设计逻辑：技术蓝图网格 + 鎏金暗夜档案感
   ========================================================================== */

:root{
  /* 色彩 */
  --obsidian:#0D0E11;
  --rock-deep:#171A20;
  --rock-line:#2C313A;
  --gilt:#D8A24A;
  --gilt-hi:#F4D68F;
  --copper:#B4653A;
  --patina:#7FB79B;
  --bone:#F3EFE7;
  --mist:#9BA3AE;
  --clay:#E3D9C6;

  /* 字体 */
  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-sans:"Inter","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular","Menlo","Consolas","Courier New",monospace;

  /* 尺度 */
  --max-width:1280px;
  --gutter:clamp(16px,4vw,40px);
  --grid-step:96px;
  --cut-sm:polygon(0 8px,8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
  --cut-md:polygon(0 14px,14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%);
  --cut-lg:polygon(0 22px,22px 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);

  --ease:cubic-bezier(.22,.7,.25,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
html:focus-within{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--bone);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  background-color:var(--obsidian);
  background-image:
    linear-gradient(to right,rgba(44,49,58,.42) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(44,49,58,.42) 1px,transparent 1px);
  background-size:var(--grid-step) var(--grid-step);
  background-position:-1px -1px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img,svg,video{max-width:100%}
img{display:block;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0}
table{border-collapse:collapse;width:100%}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}

:focus-visible{
  outline:2px solid var(--gilt-hi);
  outline-offset:3px;
  border-radius:2px;
}

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4,h5,h6{
  margin:0 0 .62em;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.24;
  letter-spacing:-.01em;
  color:var(--bone);
}
h1{font-size:clamp(2.25rem,5vw,3.6rem)}
h2{font-size:clamp(1.65rem,2.7vw,2.1rem)}
h3{font-size:clamp(1.25rem,1.8vw,1.4rem)}
h4{font-size:1.0625rem;font-weight:700}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
strong{font-weight:700;color:var(--bone)}
small{font-size:.8125rem;color:var(--mist)}
code,kbd,samp,.mono{font-family:var(--font-mono)}
::selection{background:rgba(216,162,74,.32);color:var(--bone)}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-80px;
  z-index:200;
  padding:11px 20px;
  background:linear-gradient(135deg,var(--gilt-hi),var(--gilt) 50%,var(--copper));
  color:var(--obsidian);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  clip-path:var(--cut-sm);
  transition:top .22s var(--ease);
}
.skip-link:focus{top:16px;color:var(--obsidian)}

/* ---------- 容器与网格 ---------- */
.container{
  width:100%;
  max-width:var(--max-width);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(56px,8vw,96px)}
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,24px);
}
.rule{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--rock-line),rgba(44,49,58,0));
}

/* ---------- 通用文本组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gilt);
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:linear-gradient(90deg,var(--gilt),rgba(216,162,74,0));
}
.prose{max-width:44em}
.prose p{color:rgba(243,239,231,.86)}
.prose h2,.prose h3{margin-top:1.6em}
.prose a{color:var(--gilt);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:var(--gilt-hi)}
.accent{color:var(--gilt-hi)}
.muted{color:var(--mist)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid var(--rock-line);
  background:rgba(23,26,32,.7);
  color:var(--bone);
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  line-height:1.3;
  cursor:pointer;
  text-align:center;
  clip-path:var(--cut-sm);
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{
  border-color:transparent;
  background:linear-gradient(135deg,var(--gilt-hi),var(--gilt) 46%,var(--copper));
  color:var(--obsidian);
  font-weight:700;
}
.btn-primary:hover{
  color:var(--obsidian);
  background:linear-gradient(135deg,#FFF0C9,var(--gilt-hi) 48%,var(--gilt));
}
.btn-ghost{
  border-color:rgba(216,162,74,.42);
  background:rgba(216,162,74,.06);
  color:var(--gilt-hi);
}
.btn-ghost:hover{
  color:var(--gilt-hi);
  border-color:var(--gilt);
  background:rgba(216,162,74,.15);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--rock-line)}
.breadcrumb a:hover{color:var(--gilt-hi)}
.breadcrumb [aria-current="page"]{color:var(--clay)}

/* ---------- 卡片与标签 ---------- */
.card{
  position:relative;
  padding:clamp(20px,2.4vw,30px);
  background:linear-gradient(152deg,rgba(23,26,32,.95) 0%,rgba(13,14,17,.98) 62%,rgba(23,26,32,.9) 100%);
  clip-path:var(--cut-md);
  border-top:1px solid rgba(44,49,58,.9);
}
.card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:56px;
  height:2px;
  background:linear-gradient(90deg,var(--gilt),rgba(216,162,74,0));
}
.card > :last-child{margin-bottom:0}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border:1px solid rgba(216,162,74,.4);
  background:rgba(216,162,74,.08);
  color:var(--gilt-hi);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.6;
  clip-path:var(--cut-sm);
}
.tag-patina{
  border-color:rgba(127,183,155,.42);
  background:rgba(127,183,155,.1);
  color:var(--patina);
}
.tag-gilt{
  border-color:rgba(180,101,58,.5);
  background:rgba(180,101,58,.12);
  color:#E2A57C;
}

/* ---------- 图片容器（页面阶段放置图片占位） ---------- */
.figure-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--rock-line);
  background:
    linear-gradient(140deg,rgba(23,26,32,.96),rgba(13,14,17,1)),
    repeating-linear-gradient(45deg,rgba(44,49,58,.5) 0 1px,transparent 1px 10px);
  clip-path:var(--cut-md);
}
.figure-frame > img,
.figure-frame > picture > img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.92) contrast(1.04);
}
.figure-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(13,14,17,0) 46%,rgba(13,14,17,.72) 100%);
}
.figure-frame--wide{aspect-ratio:21 / 9}
.figure-frame--tall{aspect-ratio:4 / 5}
.figure-frame--square{aspect-ratio:1 / 1}
.figure-caption{
  margin:10px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--mist);
}

/* ---------- 显现场景协议 ---------- */
html.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .65s var(--ease),transform .65s var(--ease);
}
html.has-reveal [data-reveal].is-revealed{
  opacity:1;
  transform:none;
}

/* ==========================================================================
   页头
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  padding:14px var(--gutter) 0;
}
.header-capsule{
  max-width:var(--max-width);
  margin:0 auto;
  border:1px solid rgba(44,49,58,.92);
  background:linear-gradient(115deg,rgba(23,26,32,.96) 0%,rgba(13,14,17,.9) 48%,rgba(23,26,32,.96) 100%);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  clip-path:var(--cut-md);
  transition:background .3s var(--ease);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,26px);
  padding:12px clamp(14px,2vw,22px);
  transition:padding .3s var(--ease);
}
.site-header.is-condensed .header-inner{padding-top:8px;padding-bottom:8px}

/* 品牌锁定 */
.brand-lockup{
  display:flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
  min-width:0;
}
.brand-lockup:hover .brand-name{color:var(--gilt-hi)}
.brand-mark{
  width:34px;
  height:34px;
  flex:0 0 auto;
  display:grid;
  place-items:center;
  background:linear-gradient(140deg,var(--gilt-hi) 0%,var(--gilt) 46%,var(--copper) 100%);
  color:var(--obsidian);
  font-family:var(--font-display);
  font-weight:900;
  font-size:16px;
  line-height:1;
  clip-path:polygon(0 8px,8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
}
.brand-text{
  display:flex;
  flex-direction:column;
  min-width:0;
}
.brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:17px;
  line-height:1.25;
  letter-spacing:.05em;
  color:var(--bone);
  transition:color .2s var(--ease);
  white-space:nowrap;
}
.brand-tagline{
  max-width:340px;
  overflow:hidden;
  white-space:nowrap;
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.4;
  letter-spacing:.03em;
  color:var(--mist);
  opacity:1;
  transition:opacity .26s var(--ease),max-width .32s var(--ease);
}
.site-header.is-condensed .brand-tagline{opacity:0;max-width:0}

/* 导航 */
.primary-nav{margin-left:auto}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
}
.nav-link{
  display:block;
  padding:8px 13px;
  font-size:14px;
  font-weight:500;
  letter-spacing:.03em;
  line-height:1.4;
  color:var(--mist);
  border:1px solid transparent;
  clip-path:var(--cut-sm);
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.nav-link:hover{color:var(--bone);background:rgba(44,49,58,.65)}
.nav-link[aria-current="page"]{
  color:var(--gilt-hi);
  background:rgba(216,162,74,.1);
  border-color:rgba(216,162,74,.42);
}

/* 动作区 */
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.header-cta{padding:10px 18px;font-size:13.5px}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--rock-line);
  background:rgba(23,26,32,.9);
  color:var(--bone);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  cursor:pointer;
  clip-path:var(--cut-sm);
}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
  flex:0 0 auto;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:100%;
  height:1.5px;
  background:var(--gilt);
  transition:transform .24s var(--ease),top .24s var(--ease);
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{top:8px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:4px;transform:rotate(-45deg)}
.nav-toggle-label{white-space:nowrap}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  border-top:1px solid var(--rock-line);
  background:
    linear-gradient(180deg,rgba(23,26,32,.88) 0%,rgba(13,14,17,1) 44%),
    repeating-linear-gradient(90deg,rgba(44,49,58,.45) 0 1px,transparent 1px 96px);
  padding-block:clamp(44px,6vw,76px) clamp(22px,3vw,34px);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  width:190px;
  height:2px;
  background:linear-gradient(90deg,var(--gilt),rgba(216,162,74,0));
}
.footer-inner{
  display:grid;
  grid-template-columns:1.5fr repeat(3,minmax(0,1fr)) 1.4fr;
  gap:clamp(24px,3vw,44px);
}
.footer-brand{min-width:0}
.footer-brand .brand-lockup{margin-bottom:18px}
.footer-brand-line{
  margin:0 0 10px;
  font-size:14px;
  letter-spacing:.03em;
  color:var(--clay);
}
.footer-brand-note{
  margin:0;
  max-width:34em;
  font-size:13.5px;
  line-height:1.75;
  color:var(--mist);
}
.footer-col{min-width:0}
.footer-col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gilt);
}
.footer-links{
  list-style:none;
  display:grid;
  gap:9px;
}
.footer-links a{
  position:relative;
  display:inline-block;
  padding-inline-start:13px;
  font-size:14px;
  line-height:1.6;
  color:rgba(243,239,231,.72);
}
.footer-links a::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:5px;
  height:1px;
  background:var(--rock-line);
  transition:width .22s var(--ease),background .22s var(--ease);
}
.footer-links a:hover{color:var(--gilt-hi)}
.footer-links a:hover::before{width:11px;background:var(--gilt)}

.footer-contact-list{
  list-style:none;
  display:grid;
  gap:12px;
}
.footer-contact-list li{display:grid;gap:3px}
.footer-contact-key{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--patina);
}
.footer-contact-val{
  font-size:13.5px;
  line-height:1.65;
  color:rgba(243,239,231,.82);
  word-break:break-word;
}

.footer-meta{
  margin-top:clamp(34px,4vw,54px);
  padding-top:20px;
  border-top:1px solid rgba(44,49,58,.85);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 30px;
}
.footer-meta-item{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  line-height:1.6;
  color:var(--mist);
}
.footer-meta-item:first-child{color:var(--clay)}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1180px){
  .footer-inner{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:1140px){
  .brand-tagline{display:none}
  .nav-link{padding:8px 10px;font-size:13px}
  .header-cta{padding:9px 14px;font-size:13px}
}
@media (max-width:980px){
  body{padding-bottom:92px}
  .site-header{padding-top:10px}
  .header-capsule{
    clip-path:none;
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
    background:rgba(13,14,17,.97);
  }
  .header-inner{padding:10px 14px;gap:10px}
  .brand-mark{width:30px;height:30px;font-size:14px}
  .brand-name{font-size:16px}
  .nav-toggle{display:inline-flex}
  .header-actions{margin-left:auto}
  .primary-nav{
    position:fixed;
    left:12px;
    right:12px;
    bottom:12px;
    z-index:90;
    margin:0;
    padding:10px;
    border:1px solid rgba(216,162,74,.3);
    background:linear-gradient(150deg,rgba(23,26,32,.99) 0%,rgba(13,14,17,.99) 100%);
    box-shadow:0 20px 44px rgba(0,0,0,.6);
    clip-path:var(--cut-md);
    transform:translateY(calc(100% + 30px));
    opacity:0;
    visibility:hidden;
    transition:transform .3s var(--ease),opacity .3s var(--ease),visibility .3s linear;
  }
  .primary-nav[data-open]{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:3px}
  .nav-link{padding:12px 14px;font-size:15px;border-color:rgba(44,49,58,.7)}
  .nav-link[aria-current="page"]{border-color:rgba(216,162,74,.46)}
  .footer-meta{justify-content:flex-start}
}
@media (max-width:900px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
}
@media (max-width:760px){
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand,.footer-contact-col{grid-column:1 / -1}
}
@media (max-width:640px){
  body{font-size:15.5px}
  .grid-12{gap:14px}
  .header-cta{padding:8px 12px;font-size:12.5px}
  .nav-toggle-label{display:none}
  .figure-frame--wide{aspect-ratio:16 / 11}
}

/* ==========================================================================
   无障碍与动效偏好
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html:focus-within{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html.has-reveal [data-reveal]{opacity:1;transform:none}
}