/* ==========================================================================
   合乐在线 · /assets/site.css
   共享外壳 —— 令牌 / 重置 / 中文排版 / 页头 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --c-orange-500:#FF6B2C;
  --c-orange-700:#B8430F;
  --c-orange-100:#FFE9DC;
  --c-cyan-600:#0E7C8C;
  --c-cyan-300:#6FD3DF;
  --c-ink-900:#14181C;
  --c-slate-600:#4A535C;
  --c-mist-300:#98A2AC;
  --c-cream-050:#FAF6F1;
  --c-sand-100:#F2ECE5;
  --c-line-200:#E3DAD2;
  --c-focus-500:#1B6AC9;

  --f-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --f-body:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  --f-mono:"JetBrains Mono","Roboto Mono",ui-monospace,monospace;

  --shell:min(1240px,92vw);
  --header-bar-h:72px;
  --header-total:122px;

  --r-s:10px;
  --r-m:14px;
  --r-l:18px;
  --shadow-float:0 8px 24px rgba(20,24,28,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.22,1,.36,1);
}

/* ---------- 2. 重置 ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-total) + 18px);
}

body,
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0;}

ul,ol{padding:0;list-style:none;}

img,svg,video,canvas{display:block;max-width:100%;}

a{color:inherit;text-decoration:none;}

button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}

table{border-collapse:collapse;}

input,select,textarea{font:inherit;color:inherit;}

/* ---------- 3. 中文排版基线 ---------- */
body{
  font-family:var(--f-body);
  font-weight:400;
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink-900);
  background-color:var(--c-cream-050);
  padding-top:var(--header-total);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  font-family:var(--f-display);
  line-height:1.24;
  letter-spacing:-.01em;
}

p{max-width:36em;}

strong,b{font-weight:700;}

code,kbd,samp,time,.mono{
  font-family:var(--f-mono);
  font-weight:500;
  letter-spacing:.04em;
}

::selection{background:var(--c-orange-100);color:var(--c-orange-700);}

/* 无障碍 */
.visually-hidden{
  position:absolute !important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

:focus-visible{
  outline:2px solid var(--c-focus-500);
  outline-offset:2px;
}

#main-content:focus-visible{outline-offset:-2px;}

/* ---------- 4. 布局工具 ---------- */
.shell,
.page{
  width:var(--shell);
  margin-inline:auto;
}

.section{padding-block:clamp(64px,8vw,116px);}
.section--tight{padding-block:clamp(40px,5vw,68px);}
.section--sand{background-color:var(--c-sand-100);}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}

.stack > * + *{margin-top:16px;}

.eyebrow{
  display:inline-block;
  font-family:var(--f-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-cyan-600);
}

.section-title{
  font-family:var(--f-display);
  font-weight:900;
  font-size:clamp(26px,3.4vw,42px);
  letter-spacing:-.015em;
  color:var(--c-ink-900);
}

.vertical-note{
  writing-mode:vertical-rl;
  font-family:var(--f-display);
  font-weight:500;
  font-size:12.5px;
  letter-spacing:.32em;
  color:var(--c-cyan-600);
  text-transform:uppercase;
}

.link-inline{
  color:var(--c-cyan-600);
  border-bottom:1px solid rgba(14,124,140,.36);
  transition:color .24s var(--ease),border-color .24s var(--ease);
}
.link-inline:hover{color:var(--c-orange-700);border-bottom-color:var(--c-orange-500);}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 24px;
  border-radius:999px;
  font-family:var(--f-body);
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  border:1px solid transparent;
  transition:background-color .26s var(--ease),color .26s var(--ease),
             border-color .26s var(--ease),box-shadow .26s var(--ease),
             transform .26s var(--ease);
}
.btn--primary{
  background-color:var(--c-orange-500);
  color:#fff;
  box-shadow:0 6px 16px rgba(255,107,44,.24);
}
.btn--primary:hover{background-color:var(--c-orange-700);}

.btn--cyan{
  background-color:var(--c-cyan-600);
  color:#fff;
}
.btn--cyan:hover{background-color:#0A6270;}

.btn--ghost{
  background-color:#fff;
  color:var(--c-ink-900);
  border-color:var(--c-line-200);
}
.btn--ghost:hover{border-color:var(--c-orange-500);color:var(--c-orange-700);}

/* ---------- 6. 面包屑 ---------- */
.breadcrumb{
  font-family:var(--f-mono);
  font-size:12.5px;
  letter-spacing:.05em;
  color:var(--c-mist-300);
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb__item a{color:var(--c-slate-600);transition:color .22s var(--ease);}
.breadcrumb__item a:hover{color:var(--c-orange-700);}
.breadcrumb__item[aria-current="page"]{color:var(--c-ink-900);}
.breadcrumb__sep{color:var(--c-line-200);}

/* ---------- 7. 版本标记 ---------- */
.marker{
  display:inline-block;
  width:9px;height:9px;
  border-radius:50%;
  flex:none;
  vertical-align:middle;
}
.marker--new{background-color:var(--c-orange-500);}
.marker--rev{background-color:var(--c-cyan-600);}
.marker--archived{
  background-color:transparent;
  border:1.5px solid var(--c-mist-300);
}

/* ---------- 8. 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--c-line-200);
  border-radius:var(--r-l);
  background-color:var(--c-sand-100);
}
.media > img,
.media > svg,
.media > video{
  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--3x4{aspect-ratio:3 / 4;}
.media--wide{aspect-ratio:21 / 9;}

.media__placeholder{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  background-color:var(--c-sand-100);
  background-image:repeating-linear-gradient(
    135deg,
    rgba(255,107,44,.10) 0 7px,
    rgba(255,107,44,0) 7px 16px
  );
  color:var(--c-mist-300);
  font-family:var(--f-mono);
  font-size:12px;
  letter-spacing:.1em;
  text-transform:uppercase;
}
.media__caption{
  margin-top:10px;
  font-size:12.5px;
  line-height:1.7;
  color:var(--c-mist-300);
}

/* ---------- 9. 滚动显现 ---------- */
[data-reveal]{
  opacity:1;
  transform:none;
}
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.js-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ==========================================================================
   10. 页头
   ========================================================================== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  background-color:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .36s var(--ease),
             border-color .36s var(--ease),
             box-shadow .36s var(--ease);
}
.site-header.is-solid{
  background-color:rgba(250,246,241,.94);
  -webkit-backdrop-filter:saturate(150%) blur(12px);
  backdrop-filter:saturate(150%) blur(12px);
  border-bottom-color:var(--c-line-200);
  box-shadow:0 4px 18px rgba(20,24,28,.04);
}

.site-header__inner{
  width:var(--shell);
  margin-inline:auto;
}

.site-header__bar{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.8vw,28px);
  min-height:var(--header-bar-h);
}

/* --- 跳至内容 --- */
.skip-link{
  position:absolute;
  top:-120px;
  left:clamp(12px,3vw,40px);
  z-index:200;
  padding:10px 20px;
  border-radius:0 0 var(--r-m) var(--r-m);
  background-color:var(--c-ink-900);
  color:#fff;
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:0;}

/* --- 品牌 --- */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:none;
  padding:6px 0;
}
.brand__mark{
  width:38px;height:38px;
  flex:none;
  display:grid;
  place-items:center;
  border-radius:12px;
  background-color:var(--c-orange-500);
  color:#fff;
  font-family:var(--f-display);
  font-size:19px;
  font-weight:900;
  line-height:1;
  box-shadow:0 4px 12px rgba(255,107,44,.24);
}
.brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}
.brand__name{
  font-family:var(--f-display);
  font-size:18px;
  font-weight:900;
  letter-spacing:.02em;
  color:var(--c-ink-900);
}
.brand__line{
  margin-top:3px;
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--c-mist-300);
}

/* --- 主导航 --- */
.site-nav{
  margin-inline:auto;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,26px);
}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:6px 2px;
  font-size:15px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--c-slate-600);
  white-space:nowrap;
  transition:color .24s var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background-color:var(--c-orange-500);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease);
}
.site-nav__link:hover{color:var(--c-ink-900);}
.site-nav__link:hover::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{
  color:var(--c-ink-900);
  font-weight:700;
}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);}

/* --- 右侧轻入口 --- */
.site-header__aside{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
}
.version-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 11px;
  border-radius:999px;
  border:1px solid rgba(14,124,140,.18);
  background-color:rgba(14,124,140,.07);
  font-family:var(--f-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.05em;
  color:var(--c-cyan-600);
  white-space:nowrap;
}
.version-badge__dot{
  width:6px;height:6px;
  border-radius:50%;
  background-color:var(--c-orange-500);
  box-shadow:0 0 0 3px rgba(255,107,44,.16);
}
.aside-link{
  padding:6px 13px;
  border-radius:999px;
  border:1px solid var(--c-line-200);
  background-color:rgba(255,255,255,.5);
  font-size:13px;
  color:var(--c-slate-600);
  white-space:nowrap;
  transition:color .24s var(--ease),border-color .24s var(--ease),
             background-color .24s var(--ease);
}
.aside-link:hover{
  color:var(--c-orange-700);
  border-color:var(--c-orange-500);
  background-color:var(--c-orange-100);
}

/* --- 汉堡按钮 --- */
.nav-toggle{
  display:none;
  width:42px;height:42px;
  flex:none;
  border-radius:12px;
  border:1px solid var(--c-line-200);
  background-color:rgba(255,255,255,.6);
  align-items:center;
  justify-content:center;
  transition:border-color .24s var(--ease),background-color .24s var(--ease);
}
.nav-toggle:hover{border-color:var(--c-orange-500);}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background-color:var(--c-ink-900);
  transition:background-color .22s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  border-radius:2px;
  background-color:var(--c-ink-900);
  transition:transform .3s var(--ease);
}
.nav-toggle__bars::before{transform:translateY(-6px);}
.nav-toggle__bars::after{transform:translateY(6px);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background-color:transparent;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:rotate(-45deg);}

/* --- 检索条 --- */
.site-search{
  width:100%;
  padding-bottom:12px;
}
.site-search__link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 16px;
  border-radius:999px;
  border:1px solid var(--c-line-200);
  background-color:transparent;
  color:var(--c-mist-300);
  font-size:13.5px;
  letter-spacing:.02em;
  transition:background-color .32s var(--ease),border-color .32s var(--ease),
             color .32s var(--ease),box-shadow .32s var(--ease);
}
.site-search__link:hover{
  border-color:var(--c-orange-500);
  color:var(--c-slate-600);
}
.site-header.is-solid .site-search__link{
  background-color:#fff;
  border-color:var(--c-line-200);
  color:var(--c-slate-600);
  box-shadow:0 2px 10px rgba(20,24,28,.04);
}
.site-search__icon{
  width:15px;height:15px;
  flex:none;
  fill:none;
  stroke:currentColor;
  stroke-width:1.8;
  stroke-linecap:round;
}
.site-search__hint{
  flex:1 1 auto;
  min-width:0;
  text-align:left;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.site-search__section{
  flex:none;
  font-family:var(--f-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--c-cyan-600);
  opacity:0;
  transform:translateX(4px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
  white-space:nowrap;
}
.site-header.is-solid .site-search__section{
  opacity:1;
  transform:none;
}
.site-search__chev{
  flex:none;
  font-family:var(--f-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--c-orange-700);
  white-space:nowrap;
}

/* --- 阅读进度线 --- */
.site-progress{
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:2px;
  width:100%;
  background-color:var(--c-orange-500);
  transform:scaleX(0);
  transform-origin:left center;
  opacity:0;
  pointer-events:none;
  transition:opacity .3s var(--ease);
}
.site-header.is-solid .site-progress{opacity:1;}

/* ==========================================================================
   11. 页脚
   ========================================================================== */
.site-footer{
  margin-top:clamp(72px,9vw,132px);
  background-color:var(--c-sand-100);
  border-top:1px solid var(--c-line-200);
  color:var(--c-slate-600);
  font-size:14px;
}

.site-footer__inner{
  width:var(--shell);
  margin-inline:auto;
}

.site-footer__grid{
  display:grid;
  grid-template-columns:1.7fr .9fr .9fr 1.5fr;
  gap:clamp(24px,3.5vw,56px);
  padding:clamp(52px,6.5vw,84px) 0 clamp(36px,4.5vw,52px);
}

/* 品牌块 */
.footer-brand__name{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--f-display);
  font-size:clamp(22px,2.4vw,30px);
  font-weight:900;
  letter-spacing:-.01em;
  color:var(--c-ink-900);
}
.footer-brand__name::before{
  content:"";
  width:10px;height:10px;
  flex:none;
  border-radius:3px;
  background-color:var(--c-orange-500);
}
.footer-brand__motto{
  margin-top:14px;
  max-width:22em;
  font-size:14.5px;
  line-height:1.75;
  color:var(--c-slate-600);
}
.footer-brand__region{
  margin-top:18px;
  padding-top:16px;
  max-width:24em;
  border-top:1px dashed var(--c-line-200);
  font-size:12.5px;
  line-height:1.75;
  color:var(--c-mist-300);
}

/* 导航列 */
.footer-col__title{
  margin-bottom:16px;
  font-family:var(--f-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-cyan-600);
}
.footer-col__list li + li{margin-top:10px;}
.footer-col__list a{
  position:relative;
  display:inline-block;
  font-size:14.5px;
  color:var(--c-slate-600);
  transition:color .24s var(--ease);
}
.footer-col__list a::after{
  content:"";
  position:absolute;
  left:0;bottom:-2px;
  width:100%;height:1px;
  background-color:currentColor;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .28s var(--ease);
}
.footer-col__list a:hover{color:var(--c-orange-700);}
.footer-col__list a:hover::after{transform:scaleX(1);}

/* 联系块 */
.footer-contact__list{
  display:grid;
  gap:12px;
}
.footer-contact__list dt{
  font-family:var(--f-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--c-mist-300);
}
.footer-contact__list dd{
  margin:0;
  font-family:var(--f-mono);
  font-size:13.5px;
  font-weight:500;
  line-height:1.6;
  color:var(--c-ink-900);
  word-break:break-word;
}
.footer-contact__note{
  margin-top:16px;
  max-width:24em;
  padding-top:14px;
  border-top:1px dashed var(--c-line-200);
  font-size:12.5px;
  line-height:1.75;
  color:var(--c-mist-300);
}

/* 底栏 */
.site-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 28px;
  padding:20px 0 34px;
  border-top:1px solid var(--c-line-200);
  font-family:var(--f-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--c-mist-300);
}
.legal-list{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
}
.legal-list a{
  color:var(--c-slate-600);
  transition:color .24s var(--ease);
}
.legal-list a:hover{color:var(--c-orange-700);}
.footer-icp{margin-left:auto;}
.footer-copy{width:100%;}

/* ==========================================================================
   12. 响应式
   ========================================================================== */
@media (max-width:1024px){
  :root{
    --header-bar-h:64px;
    --header-total:112px;
  }

  .site-header__aside{display:none;}

  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:fixed;
    top:var(--header-total);
    left:0;
    right:0;
    z-index:110;
    display:none;
    flex-direction:column;
    align-items:stretch;
    margin-inline:0;
    padding:10px max(4vw,18px) 24px;
    background-color:var(--c-cream-050);
    border-top:1px solid var(--c-line-200);
    border-bottom:1px solid var(--c-line-200);
    box-shadow:0 18px 36px rgba(20,24,28,.08);
    max-height:calc(100vh - var(--header-total));
    overflow-y:auto;
  }
  .site-nav[data-open]{
    display:flex;
    animation:hl-nav-in .28s var(--ease-out) both;
  }

  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav__list li{border-bottom:1px solid var(--c-line-200);}
  .site-nav__list li:last-child{border-bottom:0;}

  .site-nav__link{
    display:block;
    padding:15px 4px;
    font-size:16.5px;
    font-weight:600;
    color:var(--c-ink-900);
  }
  .site-nav__link::after{display:none;}
  .site-nav__link[aria-current="page"]{
    color:var(--c-orange-700);
    font-weight:800;
  }

  .site-search{padding-bottom:10px;}

  .site-footer__grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:40px clamp(20px,4vw,40px);
  }
  .footer-brand{grid-column:1 / -1;}
  .footer-contact{grid-column:1 / -1;}
}

@keyframes hl-nav-in{
  from{opacity:0;transform:translateY(-8px);}
  to{opacity:1;transform:translateY(0);}
}

@media (max-width:640px){
  :root{--header-bar-h:60px;--header-total:104px;}

  body{font-size:15.5px;}

  .brand__mark{width:34px;height:34px;font-size:17px;border-radius:10px;}
  .brand__name{font-size:16.5px;}
  .brand__line{display:none;}

  .site-search__chev{display:none;}
  .site-search__link{font-size:13px;padding:8px 14px;}
  .site-search__section{font-size:11px;}

  .site-footer__grid{
    grid-template-columns:minmax(0,1fr);
    gap:34px;
  }
  .site-footer__base{
    gap:10px 20px;
    font-size:12px;
  }
  .footer-icp{margin-left:0;width:100%;}
  .footer-copy{width:100%;}
}

/* ---------- 13. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}

  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }

  .js-reveal [data-reveal],
  [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }

  .site-nav[data-open]{animation:none !important;}
}