/* 金马城服务 · 共享样式 /assets/site.css
   顺序：变量 → 重置 → 排版 → 版式容器 → 通用组件 → 头部 → 页脚 → 动效 → 响应式 */

:root{
  --ink-950:#0B1015;
  --ink-900:#101B2B;
  --ink-800:#1C3049;
  --slate-500:#6F7F8F;
  --paper:#F7F1E6;
  --paper-warm:#EADFCB;
  --sand:#D9C7A7;
  --amber:#C68B33;
  --amber-light:#E3B565;
  --rust:#9C3D2E;
  --rail-w:272px;
  --frame-h:54px;
  --bar-h:64px;
  --gutter:clamp(20px,4vw,64px);
  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,"Courier New",monospace;
  --shadow-plate:0 18px 34px -28px rgba(11,16,21,.72);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--ink-900);
  background-color:var(--paper);
  background-image:
    radial-gradient(120% 80% at 12% -10%,rgba(198,139,51,.12),transparent 52%),
    radial-gradient(90% 70% at 100% 0%,rgba(28,48,73,.09),transparent 46%);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (min-width:901px){body{padding-left:var(--rail-w);padding-top:var(--frame-h)}}
@media (max-width:900px){body{padding-top:var(--bar-h)}}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.22;letter-spacing:-.01em;margin:0}
p,dl,dd,dt,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
main{display:block;min-height:60vh}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px}
.site-header :focus-visible,.site-footer :focus-visible{outline-color:var(--amber-light)}

.skip-link{
  position:fixed;left:14px;top:-90px;z-index:200;
  padding:11px 18px;background:var(--amber);color:var(--ink-950);
  font-family:var(--font-body);font-size:14px;letter-spacing:.06em;
  border:1px solid var(--ink-950);border-radius:2px;
  transition:top .18s ease;
}
.skip-link:focus{top:14px}

.visually-hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 排版工具 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.28em;
  text-transform:uppercase;color:var(--rust);
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor}
.display-title{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(2.3rem,5.6vw,4.6rem);line-height:1.08;letter-spacing:-.02em;
  color:var(--ink-900);
}
.section-title{
  font-size:clamp(1.5rem,2.6vw,2.2rem);font-weight:900;
  color:var(--ink-900);letter-spacing:-.01em;
}
.title-note{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;
  color:var(--slate-500);
}
.lede{
  font-size:clamp(15px,1.5vw,18px);line-height:1.82;
  color:var(--ink-800);max-width:64ch;
}
.mono{font-family:var(--font-mono);letter-spacing:.08em}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.prose{max-width:68ch;font-size:16.5px;line-height:1.85;color:var(--ink-800)}
.prose h2{margin:2.2em 0 .6em;font-size:clamp(1.4rem,2.2vw,1.9rem);color:var(--ink-900)}
.prose h3{margin:1.8em 0 .5em;font-size:1.15rem;color:var(--ink-900)}
.prose p+p{margin-top:1em}
.prose ul{margin:1em 0}
.prose li{position:relative;padding-left:1.05em;margin-bottom:.35em}
.prose li::before{content:"";position:absolute;left:0;top:.78em;width:7px;height:1px;background:var(--amber)}
.prose a{color:var(--rust);text-decoration:underline;text-underline-offset:3px}
.prose strong{color:var(--ink-900)}

/* ---------- 版式容器 ---------- */
.canvas{
  width:100%;max-width:1240px;
  padding:clamp(30px,4.6vw,72px) var(--gutter) clamp(56px,7vw,110px);
}
.canvas--narrow{max-width:840px}
.section{position:relative;padding-block:clamp(30px,4.6vw,62px)}
.section + .section{border-top:1px solid var(--sand)}
.rule{height:1px;border:0;background:var(--sand);margin:clamp(22px,3vw,40px) 0}
.grid{display:grid;gap:clamp(18px,2.6vw,40px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--asym{grid-template-columns:minmax(0,1.5fr) minmax(0,.85fr);align-items:start}
@media (max-width:900px){
  .grid--2,.grid--3,.grid--asym{grid-template-columns:minmax(0,1fr)}
}

.breadcrumb{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--slate-500);margin-bottom:22px;
}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px}
.breadcrumb li + li::before{content:"/";margin-right:8px;color:var(--sand)}
.breadcrumb a:hover{color:var(--rust)}

/* ---------- 按钮 / 标签 / 纸片 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border:1px solid transparent;border-radius:2px;
  font-family:var(--font-body);font-size:15px;font-weight:500;line-height:1.2;letter-spacing:.04em;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--amber);color:var(--ink-950)}
.btn--primary:hover{background:var(--amber-light)}
.btn--rust{background:var(--rust);color:var(--paper)}
.btn--rust:hover{background:#B14A37}
.btn--ghost{border-color:var(--sand);color:var(--ink-900);background:transparent}
.btn--ghost:hover{border-color:var(--amber);background:rgba(198,139,51,.12)}
.btn--block{width:100%}

.tag{
  display:inline-block;padding:4px 9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  border:1px solid var(--sand);background:var(--paper-warm);color:var(--ink-800);
}
.tag--amber{background:var(--amber);border-color:var(--amber);color:var(--ink-950)}

.paper-card{
  position:relative;
  padding:clamp(18px,2.4vw,30px);
  background:#FBF6EC;
  border:1px solid var(--sand);
  box-shadow:0 1px 0 var(--sand),var(--shadow-plate);
}
.paper-card--stack::before{
  content:"";position:absolute;z-index:-1;
  left:10px;right:-10px;top:10px;bottom:-10px;
  background:var(--paper-warm);
  border:1px solid var(--sand);
}

/* ---------- 图框（供页面阶段放图片占位） ---------- */
.image-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--sand);
  background:linear-gradient(160deg,var(--ink-800),var(--ink-950) 72%);
}
.image-frame img{width:100%;height:100%;object-fit:cover}
.image-frame--wide{aspect-ratio:21/9}
.image-frame--tall{aspect-ratio:3/4}
.image-frame--square{aspect-ratio:1/1}
.image-frame--dusk{
  background:
    radial-gradient(120% 90% at 18% 108%,rgba(11,16,21,.92),transparent 62%),
    linear-gradient(184deg,var(--amber-light) 0%,var(--amber) 34%,var(--ink-800) 72%,var(--ink-950) 100%);
}
.image-frame--trail{
  background:
    repeating-linear-gradient(115deg,rgba(247,241,230,.14) 0 1px,transparent 1px 26px),
    radial-gradient(100% 80% at 78% 112%,rgba(198,139,51,.55),transparent 60%),
    linear-gradient(180deg,var(--ink-800),var(--ink-950));
}
.image-caption{
  position:absolute;left:12px;bottom:12px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;
  color:var(--paper);background:rgba(11,16,21,.62);
  padding:3px 8px;border-left:2px solid var(--amber);
}

/* ---------- 头部：侧边轨道 + 顶部窄框 ---------- */
.site-header{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:80;
  display:flex;flex-direction:column;
  padding:28px 22px 22px;
  background:var(--ink-900);
  color:var(--paper);
  border-right:1px solid rgba(217,199,167,.34);
  overflow-y:auto;overscroll-behavior:contain;
}
.site-header::after{
  content:"";position:absolute;top:0;left:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--amber),var(--rust) 58%,rgba(198,139,51,0));
}
.rail-brand{margin-bottom:clamp(18px,4vh,38px)}
.brand{display:block}
.brand-mark{
  display:block;font-family:var(--font-display);font-weight:900;
  font-size:30px;line-height:1.1;letter-spacing:.06em;color:var(--paper);
  transition:color .2s ease;
}
.brand:hover .brand-mark{color:var(--amber-light)}
.brand-name{
  display:block;margin-top:6px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.34em;
  text-transform:uppercase;color:var(--amber-light);
}
.brand-tagline{
  display:flex;align-items:center;gap:10px;margin-top:14px;
  font-size:12px;letter-spacing:.32em;color:var(--sand);
}
.brand-tagline::before{content:"";width:22px;height:1px;background:var(--amber)}

.nav-toggle{display:none}

.site-nav{display:flex;flex-direction:column;flex:1 1 auto;gap:20px;min-height:0}
.nav-caption{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.32em;
  text-transform:uppercase;color:rgba(247,241,230,.5);
}
.nav-list{display:flex;flex-direction:column;border-top:1px solid rgba(217,199,167,.2)}
.nav-item{border-bottom:1px solid rgba(217,199,167,.14)}
.nav-link{
  position:relative;display:flex;align-items:baseline;gap:12px;
  padding:11px 6px 11px 14px;
  font-family:var(--font-display);font-size:16.5px;letter-spacing:.04em;
  color:rgba(247,241,230,.82);
  transition:color .18s ease,background-color .18s ease,padding-left .18s ease;
}
.nav-link::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;background:var(--amber);
  transition:height .2s ease;
}
.nav-link:hover{color:var(--paper);background:rgba(28,48,73,.78);padding-left:18px}
.nav-link:hover::before{height:62%}
.nav-link[aria-current="page"]{color:var(--amber-light);background:rgba(198,139,51,.14)}
.nav-link[aria-current="page"]::before{height:100%}
.nav-link[aria-current="page"] .nav-index{color:var(--amber-light);opacity:1}
.nav-index{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;
  color:var(--amber);opacity:.72;
}
.nav-label{flex:1 1 auto}

.rail-plates{display:grid;gap:8px}
.rail-plate{
  display:flex;align-items:baseline;justify-content:space-between;gap:10px;
  padding:9px 11px;
  background:rgba(247,241,230,.06);
  border:1px solid rgba(217,199,167,.28);
  border-left:2px solid var(--amber);
  color:var(--paper);
  transition:background-color .18s ease,border-color .18s ease;
}
.rail-plate:hover{background:rgba(198,139,51,.2);border-color:var(--amber)}
.rail-plate-label{font-size:13.5px;letter-spacing:.06em}
.rail-plate-meta{
  font-family:var(--font-mono);font-size:9.5px;letter-spacing:.1em;color:var(--sand);
}

.rail-cta{
  margin-top:auto;
  padding-block:13px;letter-spacing:.18em;
  box-shadow:0 8px 20px -14px rgba(198,139,51,.95);
}
.rail-meta{
  margin-top:16px;padding-top:12px;
  border-top:1px solid rgba(217,199,167,.2);
  display:grid;gap:2px;
}
.rail-meta-line{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:rgba(247,241,230,.45);
}

.frame-top{
  position:fixed;top:0;left:var(--rail-w);right:0;height:var(--frame-h);z-index:70;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:0 var(--gutter);
  background:rgba(247,241,230,.94);
  border-bottom:1px solid var(--sand);
  backdrop-filter:blur(6px);
}
.frame-top-label{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.28em;
  text-transform:uppercase;color:var(--ink-800);
}
.frame-dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--rust);
}
.frame-top-meta{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;color:var(--slate-500);
}

.progress-track{
  position:fixed;top:calc(var(--frame-h) - 2px);left:var(--rail-w);right:0;height:2px;z-index:90;
  background:rgba(217,199,167,.3);pointer-events:none;
}
.progress-bar{
  display:block;width:100%;height:100%;
  background:linear-gradient(90deg,var(--amber),var(--rust));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .12s linear;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  padding:clamp(46px,6vw,84px) var(--gutter) clamp(28px,4vw,44px);
  background:var(--ink-950);
  color:rgba(247,241,230,.86);
  border-top:6px solid var(--sand);
}
.site-footer::after{
  content:"";position:absolute;right:-90px;bottom:-150px;width:420px;height:420px;
  border:1px solid rgba(217,199,167,.16);border-radius:50%;pointer-events:none;
}
.footer-inner{position:relative;z-index:1;max-width:1240px;margin:0 auto}
.footer-crest{
  max-width:780px;
  padding-bottom:clamp(26px,4vw,48px);
  border-bottom:1px solid rgba(217,199,167,.24);
}
.footer-eyebrow{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.32em;
  text-transform:uppercase;color:var(--amber-light);
}
.footer-line{
  margin-top:14px;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(1.6rem,3.6vw,2.8rem);line-height:1.18;letter-spacing:.02em;
  color:var(--paper);
}
.footer-summary{
  margin-top:16px;max-width:56ch;
  font-size:14.5px;line-height:1.85;color:rgba(247,241,230,.62);
}
.footer-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(24px,4vw,56px);
  margin-top:clamp(28px,4vw,52px);
}
.footer-block-title{
  margin-bottom:16px;
  font-family:var(--font-mono);font-size:10.5px;font-weight:500;letter-spacing:.3em;
  text-transform:uppercase;color:rgba(247,241,230,.45);
}
.footer-list{display:grid;gap:9px}
.footer-link{
  font-size:14.5px;letter-spacing:.04em;color:rgba(247,241,230,.82);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer-link:hover{color:var(--amber-light);border-bottom-color:rgba(227,181,101,.6)}
.footer-contact{display:grid;gap:14px}
.contact-item{display:grid;gap:2px}
.contact-label{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.24em;
  text-transform:uppercase;color:rgba(247,241,230,.42);
}
.contact-value{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:14.5px;color:var(--paper);word-break:break-word;
}
.contact-text{letter-spacing:.01em}
.copy-btn{
  padding:3px 8px;border:1px solid rgba(217,199,167,.4);border-radius:2px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;color:var(--sand);
  transition:background-color .18s ease,border-color .18s ease,color .18s ease;
}
.copy-btn:hover{border-color:var(--amber);color:var(--amber-light)}
.copy-btn.is-copied{background:var(--amber);border-color:var(--amber);color:var(--ink-950)}
.footer-note{
  margin-top:18px;max-width:46ch;padding-left:12px;
  border-left:2px solid var(--rust);
  font-size:12.5px;line-height:1.8;color:rgba(247,241,230,.52);
}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:clamp(32px,4vw,56px);padding-top:20px;
  border-top:1px solid rgba(217,199,167,.2);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;
  color:rgba(247,241,230,.45);
}
.footer-icp,.footer-region,.footer-copy{margin:0}

.to-top{
  position:fixed;right:clamp(14px,2vw,28px);bottom:clamp(14px,2vw,28px);z-index:95;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 14px;border:1px solid rgba(217,199,167,.45);border-radius:2px;
  background:var(--ink-900);color:var(--paper);
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,border-color .18s ease,color .18s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--amber);color:var(--amber-light)}
.to-top-arrow{color:var(--amber)}
.to-top-text{display:inline-block}

/* ---------- 显现 ---------- */
html.js-reveal [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .42s ease,transform .42s ease;
}
html.js-reveal [data-reveal].is-revealed{opacity:1;transform:none}
html.nav-open{overflow:hidden}

/* ---------- 平板 ---------- */
@media (min-width:901px) and (max-width:1180px){
  :root{--rail-w:236px;--gutter:clamp(20px,3vw,40px)}
  .brand-mark{font-size:26px}
  .nav-link{font-size:15.5px;padding-block:9px}
  .rail-plate{padding:8px 10px}
}
@media (min-width:901px) and (max-height:760px){
  .site-header{padding-top:18px}
  .rail-brand{margin-bottom:14px}
  .rail-plates{display:none}
  .nav-link{padding-block:7px;font-size:15px}
  .rail-meta{margin-top:12px}
}

/* ---------- 移动端 ---------- */
@media (max-width:900px){
  .site-header{
    top:0;left:0;right:0;bottom:auto;
    width:auto;height:var(--bar-h);
    flex-direction:row;align-items:center;justify-content:space-between;gap:14px;
    padding:0 16px;
    border-right:0;border-bottom:1px solid rgba(217,199,167,.34);
    overflow:visible;
  }
  .rail-brand{margin:0}
  .brand-mark{font-size:20px;letter-spacing:.08em}
  .brand-name{margin-top:2px;font-size:9px;letter-spacing:.28em}
  .brand-tagline{display:none}
  .frame-top{display:none}
  .progress-track{top:calc(var(--bar-h) - 2px);left:0}

  .nav-toggle{
    display:inline-grid;grid-template-columns:16px auto;grid-template-rows:repeat(3,1.5px);
    align-items:center;column-gap:10px;row-gap:3px;
    padding:9px 12px;border:1px solid rgba(217,199,167,.42);border-radius:2px;
    color:var(--paper);
  }
  .nav-toggle-bar{
    grid-column:1;width:16px;height:1.5px;background:var(--amber-light);
    transition:transform .2s ease,opacity .2s ease;
  }
  .nav-toggle-text{
    grid-column:2;grid-row:1 / 4;
    font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;color:var(--paper);
  }
  .site-header[data-open] .nav-toggle-bar:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
  .site-header[data-open] .nav-toggle-bar:nth-child(2){opacity:0}
  .site-header[data-open] .nav-toggle-bar:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}

  .site-nav{
    position:fixed;top:var(--bar-h);left:0;right:0;bottom:0;
    padding:26px 20px 44px;
    background:var(--ink-900);
    border-top:1px solid rgba(217,199,167,.24);
    overflow-y:auto;gap:20px;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .site-header[data-open] .site-nav{opacity:1;visibility:visible;transform:none}
  .nav-link{font-size:18px;padding:14px 6px 14px 16px}
  .nav-caption{color:rgba(247,241,230,.55)}
  .rail-cta{margin-top:8px}
  .rail-meta{margin-top:8px}
}

@media (max-width:1080px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:700px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-base{justify-content:flex-start;gap:8px}
  .to-top-text{display:none}
  .to-top{padding:11px 13px}
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
  .btn:hover{transform:none}
  html.js-reveal [data-reveal]{opacity:1;transform:none}
}