/* 经典服务 · 经典K8中文站 共享站点样式 /assets/site.css */

:root{
  --ink:#0B1A2B;
  --ink-soft:#12293F;
  --paper:#F5F1E8;
  --gold:#C9A24B;
  --gold-bright:#E8C877;
  --cinnabar:#B33A2C;
  --cinnabar-soft:#D9765F;
  --slate:#8C9BA8;
  --slate-deep:#4A5A69;
  --jade:#3E7A78;
  --apricot:#E9D9BC;
  --line:rgba(140,155,168,.28);
  --line-strong:rgba(140,155,168,.52);
  --font-head:"Noto Serif SC","Source Han Serif SC","Songti SC",serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --wrap:1280px;
  --wrap-wide:1440px;
  --pad:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.8;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
main{display:block}
img,picture,svg{max-width:100%}
img{height:auto;border:0}
h1,h2,h3,h4,h5{
  font-family:var(--font-head);
  font-weight:600;
  line-height:1.25;
  letter-spacing:-.01em;
  margin:0;
}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--gold);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--gold-bright)}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--gold-bright);outline-offset:3px}
::selection{background:var(--gold);color:var(--ink)}

.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;
}
.mono{font-family:var(--font-mono);font-size:.94em;letter-spacing:.04em}

/* ---------- 跳过导航 ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:120;
  display:inline-block;
  padding:10px 18px;
  background:var(--gold);
  color:var(--ink);
  font-size:14px;
  font-weight:500;
  letter-spacing:.04em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:14px;color:var(--ink)}

/* ---------- 头部 ---------- */
.site-header{position:relative;z-index:60;background:var(--ink)}

.brandbar{
  background:var(--ink-soft);
  border-bottom:1px solid var(--line);
}
.brandbar__inner{
  max-width:var(--wrap-wide);
  margin:0 auto;
  padding:11px var(--pad);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.brandbar__id{
  display:flex;
  align-items:baseline;
  gap:16px;
  flex-wrap:wrap;
}
.brandbar__line{
  font-family:var(--font-head);
  font-size:15px;
  font-weight:600;
  letter-spacing:.09em;
  color:var(--paper);
}
.brandbar__sig{
  font-size:13px;
  letter-spacing:.03em;
  color:var(--slate);
}
.brandbar__sig::before{
  content:"";
  display:inline-block;
  width:20px;
  height:1px;
  margin-right:9px;
  vertical-align:middle;
  background:var(--gold);
}
.brandbar__meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line-strong);
  border-radius:0;
  background:transparent;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--slate);
  white-space:nowrap;
}
.badge--gold{color:var(--gold);border-color:rgba(201,162,75,.55)}
.badge--mono{color:var(--slate)}
.badge--solid{background:var(--gold);border-color:var(--gold);color:var(--ink)}

.navrow{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease),background-color .24s var(--ease);
}
.navrow[data-stuck]{
  background:#0d1f33;
  box-shadow:0 14px 32px rgba(0,0,0,.42);
}
.navrow__inner{
  max-width:var(--wrap-wide);
  margin:0 auto;
  padding:0 var(--pad);
  min-height:60px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}

.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:rgba(74,90,105,.45);
  overflow:hidden;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  width:100%;
  height:100%;
  background:linear-gradient(90deg,var(--gold),var(--gold-bright));
  transform:scaleX(0);
  transform-origin:left center;
}

.mainnav{min-width:0}
.mainnav__list{
  counter-reset:navindex;
  display:flex;
  align-items:stretch;
  gap:2px;
  overflow-x:auto;
  scrollbar-width:thin;
}
.mainnav__list>li{counter-increment:navindex;display:flex}
.mainnav a{
  display:flex;
  align-items:baseline;
  gap:9px;
  padding:18px 18px 16px;
  color:rgba(245,241,232,.78);
  font-size:15px;
  font-weight:500;
  letter-spacing:.03em;
  white-space:nowrap;
  border-bottom:2px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.mainnav a::before{
  content:counter(navindex,decimal-leading-zero);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--slate-deep);
  transition:color .2s var(--ease);
}
.mainnav a:hover{
  color:var(--paper);
  background:rgba(18,41,63,.85);
  border-bottom-color:rgba(201,162,75,.6);
}
.mainnav a:hover::before{color:var(--gold)}
.mainnav a[aria-current="page"]{
  color:var(--gold-bright);
  border-bottom-color:var(--gold);
  background:rgba(18,41,63,.95);
}
.mainnav a[aria-current="page"]::before{color:var(--gold-bright)}

.navrow__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  border:1px solid rgba(201,162,75,.55);
  border-radius:0;
  background:transparent;
  color:var(--paper);
  font-size:14px;
  font-weight:500;
  letter-spacing:.05em;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold-bright);color:var(--gold-bright)}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:16px;
  height:12px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  display:block;
  height:1px;
  background:currentColor;
  transition:transform .24s var(--ease),width .24s var(--ease);
}
.nav-toggle__bars::after{width:11px}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(3px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars::after{width:16px;transform:translateY(-3px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 18px;
  border:1px solid transparent;
  border-radius:0;
  background:transparent;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:500;
  letter-spacing:.05em;
  line-height:1.4;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--cinnabar);border-color:var(--cinnabar);color:var(--paper)}
.btn--primary:hover{background:#c9483a;border-color:#c9483a;color:var(--paper)}
.btn--ghost{border-color:rgba(201,162,75,.55);color:var(--paper)}
.btn--ghost:hover{border-color:var(--gold-bright);color:var(--gold-bright)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:var(--ink)}
.btn--gold:hover{background:var(--gold-bright);border-color:var(--gold-bright);color:var(--ink)}
.btn--sm{padding:7px 13px;font-size:13px}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-soft);
  border-top:1px solid rgba(201,162,75,.35);
  padding:56px 0 0;
  color:var(--paper);
}
.footer__inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 var(--pad);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:36px 32px;
  padding-bottom:40px;
}
.footer__brand{max-width:34ch}
.footer__brandline{
  font-family:var(--font-head);
  font-size:20px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--paper);
}
.footer__sig{
  margin-top:8px;
  font-size:14px;
  letter-spacing:.03em;
  color:var(--gold);
}
.footer__meta{
  margin-top:14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--slate);
}
.footer__coltitle{
  margin:0 0 14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--gold);
}
.footer__list{display:flex;flex-direction:column;gap:9px}
.footer__list a{
  display:inline-block;
  font-size:15px;
  color:rgba(245,241,232,.74);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer__list a:hover{color:var(--gold-bright);transform:translateX(3px)}

.footer__contact{
  padding:22px 24px;
  border:1px solid var(--line-strong);
  background:rgba(11,26,43,.55);
}
.footer__contact-label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--gold);
  margin-bottom:10px;
}
.footer__contact-line{
  font-size:15px;
  color:rgba(245,241,232,.86);
  margin-bottom:4px;
}
.footer__note{
  margin-top:12px;
  font-size:14px;
  line-height:1.75;
  color:var(--slate);
  max-width:70ch;
}

.footer__legal{
  margin-top:32px;
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:10px 28px;
  align-items:center;
  justify-content:space-between;
}
.footer__legal-item{
  font-size:13px;
  letter-spacing:.04em;
  color:var(--slate);
}
.footer__legal-item--icp{color:rgba(245,241,232,.82)}

/* ---------- 布局容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding-left:var(--pad);
  padding-right:var(--pad);
}
.wrap--wide{max-width:var(--wrap-wide)}

.section{padding:56px 0}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:14px;
  padding-bottom:18px;
  margin-bottom:28px;
  border-bottom:1px solid var(--line);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--gold);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:currentColor;
}
.rule{height:1px;border:0;background:var(--line);margin:0}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0 8px;
  padding:14px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--slate);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--slate-deep)}
.breadcrumb a{color:var(--slate)}
.breadcrumb a:hover{color:var(--gold-bright)}
.breadcrumb li[aria-current="page"]{color:var(--gold)}

/* ---------- 正文 ---------- */
.prose{
  max-width:38em;
  font-size:17px;
  line-height:1.85;
  color:rgba(245,241,232,.86);
}
.prose p+p{margin-top:1.1em}
.prose h2{margin-top:1.8em;font-size:26px;color:var(--paper)}
.prose h3{margin-top:1.5em;font-size:20px;color:var(--paper)}
.prose ul,.prose ol{margin-top:1em;display:flex;flex-direction:column;gap:.6em}
.prose li{padding-left:1.5em;position:relative}
.prose li::before{
  content:"";
  position:absolute;
  left:0;top:.75em;
  width:10px;height:1px;
  background:var(--gold);
}
.prose--paper{color:rgba(11,26,43,.88)}
.prose--paper h2,.prose--paper h3{color:var(--ink)}
.surface-paper{background:var(--paper);color:var(--ink)}
.surface-paper a{color:var(--cinnabar)}
.surface-paper a:hover{color:#8f2c21}

/* ---------- 网格与卷轴 ---------- */
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.grid--4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}

.rail{
  display:grid;
  grid-auto-flow:column;
  grid-auto-columns:minmax(258px,1fr);
  gap:18px;
  overflow-x:auto;
  padding-bottom:14px;
  scroll-snap-type:x proximity;
  scrollbar-width:thin;
}
.rail__item{scroll-snap-align:start;min-width:0}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:rgba(74,90,105,.28)}
.rail::-webkit-scrollbar-thumb{background:rgba(201,162,75,.55)}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  padding:24px;
  border:1px solid var(--line-strong);
  border-radius:0;
  background:rgba(18,41,63,.55);
  transition:border-color .22s var(--ease),background-color .22s var(--ease),transform .22s var(--ease);
}
.card::before{
  content:"";
  position:absolute;
  top:-1px;left:-1px;
  width:26px;
  height:2px;
  background:var(--gold);
}
.card:hover{
  border-color:rgba(201,162,75,.62);
  background:rgba(18,41,63,.85);
  transform:translateY(-2px);
}
.card__no{
  display:block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--gold);
}
.card__title{
  font-family:var(--font-head);
  font-size:20px;
  font-weight:600;
  line-height:1.4;
  color:var(--paper);
}

/* ---------- 图片容器基础 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line-strong);
  border-radius:0;
  background:linear-gradient(155deg,var(--ink-soft),var(--ink) 70%);
}
.media>img,
.media>picture>img,
.media>svg{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--banner{aspect-ratio:21/9}
.media__caption{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--slate);
}

/* ---------- 显现动效 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.has-js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px 24px}
  .footer__brand{grid-column:1 / -1;max-width:none}
}

@media (max-width:999px){
  body{font-size:16px}
  .brandbar__inner{padding:10px var(--pad)}
  .brandbar__sig{display:none}
  .navrow__inner{flex-wrap:wrap;padding:0 var(--pad)}
  .nav-toggle{display:inline-flex}
  .mainnav{
    display:none;
    order:3;
    flex-basis:100%;
    border-top:1px solid var(--line);
  }
  .site-header[data-open] .mainnav{display:block}
  .mainnav__list{
    flex-direction:column;
    gap:0;
    padding:6px 0 14px;
    overflow:visible;
  }
  .mainnav__list>li{display:block}
  .mainnav a{
    padding:13px 4px;
    justify-content:flex-start;
    border-bottom:1px solid var(--line);
    border-left:2px solid transparent;
    font-size:16px;
  }
  .mainnav a:hover{transform:none}
  .mainnav li:last-child a{border-bottom:0}
  .navrow__actions{order:2;margin-left:auto}
  .navrow__inner{padding-top:10px;padding-bottom:10px}
  .navrow__actions .btn--ghost{display:none}
}

@media (max-width:720px){
  :root{--pad:18px}
  .brandbar__meta .badge:first-child{display:none}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .footer__legal{flex-direction:column;align-items:flex-start;gap:8px}
  .section{padding:40px 0}
  .rail{grid-auto-columns:minmax(220px,80%)}
}

@media (max-width:420px){
  .navrow__actions .btn--primary{padding:8px 12px;font-size:13px}
  .footer__contact{padding:18px 16px}
}

/* ---------- 动效与对比度偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
  .has-js [data-reveal]{opacity:1!important;transform:none!important}
  .card:hover{transform:none}
  .footer__list a:hover{transform:none}
}

@media (prefers-contrast:more){
  .mainnav a{color:var(--paper)}
  .footer__list a{color:var(--paper)}
  .footer__note,.footer__legal-item{color:#C6D0DA}
}