/* =========================================================
   华体会手机版 — /assets/site.css
   共享外壳：reset、变量、中文排版、双层页头、四段页脚、
   通用按钮、面包屑、正文容器、12 栏网格、基础组件
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --navy:#0B2A5B;
  --navy-deep:#061A3A;
  --orange:#FF6A13;
  --orange-mist:#FFB37A;
  --teal:#12B5A5;
  --cream:#F6F1E7;
  --paper:#FFFDF8;
  --ink:#221A14;
  --muted:#5A6B85;
  --rule:#D8CFC0;
  --rule-soft:#E7DFD1;

  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1240px;
  --gutter:24px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:220ms;
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:132px;
}

body,
h1,h2,h3,h4,h5,h6,
p,figure,blockquote,ul,ol,dl,dd{margin:0;}

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

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

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

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

hr{border:0;}

/* ---------- 3. 中文排版与基础文字 ---------- */
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  font-weight:900;
  line-height:1.08;
  letter-spacing:-.02em;
  text-wrap:balance;
}

h3,h4{
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
}

p{text-wrap:pretty;}

::selection{
  background:var(--orange);
  color:#fff;
}

/* ---------- 4. 焦点样式 ---------- */
:focus-visible{
  outline:3px solid var(--teal);
  outline-offset:2px;
}

.site-header :focus-visible,
.site-footer :focus-visible{
  outline:3px solid var(--orange-mist);
  outline-offset:2px;
}

/* ---------- 5. 容器与跳过链接 ---------- */
.container{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  display:inline-block;
  padding:10px 16px;
  background:var(--orange);
  color:#fff;
  font-size:14px;
  font-weight:700;
  border-radius:2px;
  transform:translateY(-160%);
  transition:transform var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible{
  transform:translateY(0);
}

/* ---------- 6. 双层页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--navy);
  color:var(--paper);
  box-shadow:0 1px 0 rgba(6,26,58,.35);
}

/* 6.1 上层品牌条 */
.header-top{
  background:var(--navy-deep);
  border-bottom:1px solid rgba(255,255,255,.14);
}

.header-top-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:46px;
  padding-block:8px;
}

.brand-lockup{
  display:flex;
  align-items:baseline;
  gap:14px;
  flex-wrap:wrap;
  min-width:0;
}

.brand-name{
  position:relative;
  font-size:20px;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.1;
  color:var(--paper);
  padding-left:11px;
}

.brand-name::before{
  content:"";
  position:absolute;
  left:0;
  top:.14em;
  bottom:.14em;
  width:4px;
  background:var(--orange);
}

.brand-name:hover{color:var(--orange-mist);}

.brand-tag{
  font-size:12.5px;
  font-weight:500;
  letter-spacing:.04em;
  color:var(--orange-mist);
  white-space:nowrap;
}

.header-meta{
  display:flex;
  align-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:#B9C6DC;
  font-variant-numeric:tabular-nums;
}

.meta-item{
  padding-inline:14px;
  border-left:1px solid rgba(255,255,255,.16);
  white-space:nowrap;
}

.meta-item:first-child{
  border-left:0;
  padding-left:0;
}

.meta-item:last-child{padding-right:0;}

/* 6.2 下层栏目条 */
.header-nav-row{
  position:relative;
  background:var(--navy);
}

.header-nav-inner{
  display:flex;
  align-items:stretch;
  justify-content:space-between;
  gap:16px;
  min-height:56px;
}

.primary-nav{
  min-width:0;
  display:flex;
  align-items:stretch;
}

.nav-list{
  display:flex;
  align-items:stretch;
  flex-wrap:wrap;
}

.nav-item{display:flex;}

.nav-link{
  display:flex;
  align-items:baseline;
  gap:7px;
  padding:16px 13px;
  font-size:14.5px;
  font-weight:500;
  letter-spacing:.01em;
  color:#D7E1F2;
  border-bottom:3px solid transparent;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}

.nav-num{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.02em;
  color:var(--orange-mist);
  transition:color var(--dur) var(--ease);
}

.nav-link:hover{
  background:rgba(255,255,255,.08);
  color:var(--paper);
}

.nav-link:hover .nav-num{color:var(--orange);}

.nav-link[aria-current="page"]{
  background:var(--orange);
  color:#fff;
  border-bottom-color:#fff;
}

.nav-link[aria-current="page"] .nav-num{color:rgba(255,255,255,.82);}

.header-cta{
  align-self:center;
  flex:0 0 auto;
  margin-block:10px;
}

/* 6.3 移动端抽屉按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:12px 4px;
  color:var(--paper);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
}

.nav-toggle-lines{
  display:inline-flex;
  flex-direction:column;
  justify-content:space-between;
  width:18px;
  height:14px;
}

.nav-toggle-line{
  display:block;
  width:18px;
  height:2px;
  background:var(--orange);
  transform-origin:center;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}

.nav-toggle-text{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.12em;
  color:#C9D6EA;
}

.site-header[data-open] .nav-toggle-text{color:var(--orange-mist);}

.site-header[data-open] .nav-toggle-line:nth-child(1){transform:translateY(6px) rotate(45deg);}
.site-header[data-open] .nav-toggle-line:nth-child(2){opacity:0;}
.site-header[data-open] .nav-toggle-line:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- 7. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 18px;
  font-family:var(--font-sans);
  font-size:14px;
  font-weight:700;
  line-height:1;
  letter-spacing:.02em;
  border:1px solid transparent;
  border-radius:2px;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}

.btn:active{transform:translateY(1px);}

.btn--accent{
  background:var(--orange);
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.06);
}

.btn--accent:hover{background:#FF7F33;color:#fff;}

.btn--ghost{
  background:transparent;
  color:var(--navy);
  border-color:var(--rule);
}

.btn--ghost:hover{
  border-color:var(--navy);
  background:var(--cream);
}

.btn--dark{
  background:var(--navy);
  color:var(--paper);
}

.btn--dark:hover{background:var(--navy-deep);}

/* ---------- 8. 四段式页脚 ---------- */
.site-footer{
  margin-top:0;
  background:var(--navy-deep);
  color:#C8D4E7;
  font-size:14px;
}

.site-footer::before{
  content:"";
  display:block;
  height:4px;
  background:linear-gradient(
    90deg,
    var(--orange) 0 20%,
    var(--orange-mist) 20% 27%,
    var(--teal) 27% 36%,
    var(--navy) 36% 100%
  );
}

.footer-body{padding-block:52px 0;}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .8fr .8fr .8fr 1.5fr;
  gap:32px 28px;
  padding-bottom:40px;
}

.footer-brand-name{
  font-size:26px;
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.1;
  color:var(--paper);
}

.footer-tagline{
  margin-top:10px;
  max-width:22ch;
  font-size:14px;
  line-height:1.7;
  color:#93A6C2;
}

.footer-col-title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.16em;
  color:var(--orange-mist);
}

.footer-links{display:grid;gap:9px;}

.footer-links a{
  display:inline-block;
  font-size:14.5px;
  color:#C8D4E7;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}

.footer-links a:hover{
  color:var(--paper);
  border-bottom-color:var(--orange);
}

.footer-contact{min-width:0;}

.contact-line{
  display:grid;
  gap:2px;
  margin-bottom:10px;
  line-height:1.6;
}

.contact-label{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.16em;
  color:#7E92B0;
}

.contact-value{
  font-size:13.5px;
  color:#DCE5F3;
  overflow-wrap:anywhere;
}

.contact-note{
  margin-top:14px;
  font-size:12.5px;
  line-height:1.7;
  color:#8296B4;
  border-left:2px solid var(--teal);
  padding-left:10px;
}

.footer-legal{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px 28px;
  flex-wrap:wrap;
  padding-block:18px 26px;
  border-top:1px solid rgba(255,255,255,.14);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.02em;
  color:#7E92B0;
  font-variant-numeric:tabular-nums;
}

.legal-item{line-height:1.6;}

.legal-item:nth-child(2){color:#A9B9D2;}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--muted);
  font-variant-numeric:tabular-nums;
}

.breadcrumbs a{
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}

.breadcrumbs a:hover{
  color:var(--navy);
  border-bottom-color:var(--orange);
}

.breadcrumbs [aria-current="page"]{color:var(--navy);}

.breadcrumb-sep{color:var(--rule);}

/* ---------- 10. 章节头与正文 ---------- */
.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:6px 18px;
  align-items:start;
  margin-bottom:28px;
}

.section-index{
  grid-row:span 2;
  font-family:var(--font-mono);
  font-size:46px;
  font-weight:500;
  line-height:.9;
  letter-spacing:-.04em;
  color:var(--orange);
  font-variant-numeric:tabular-nums;
}

.eyebrow{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.18em;
  color:var(--muted);
}

.section-head h2,
.section-head h3{color:var(--navy);}

.lede{
  max-width:62ch;
  font-size:19px;
  line-height:1.7;
  color:#3A2E24;
}

.prose{
  max-width:62ch;
  font-size:17px;
  line-height:1.78;
  color:var(--ink);
}

.prose p + p{margin-top:1.05em;}
.prose ul,.prose ol{display:grid;gap:8px;margin-top:1em;}
.prose li{position:relative;padding-left:20px;}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:8px;
  height:1px;
  background:var(--orange);
}

/* ---------- 11. 12 栏非对称网格 ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}

.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.span-8{grid-column:span 8;}
.span-12{grid-column:span 12;}

/* ---------- 12. 面板 ---------- */
.surface{
  padding:26px;
  background:var(--paper);
  border:1px solid var(--rule);
  border-radius:2px;
}

.surface--cream{
  background:var(--cream);
  border-color:var(--rule-soft);
}

.surface--ink{
  background:var(--navy-deep);
  border-color:transparent;
  color:#D6E0EF;
}

.surface--ink h2,
.surface--ink h3{color:var(--paper);}

/* ---------- 13. 标签、状态点、等宽数据 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 9px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.06em;
  line-height:1.5;
  color:var(--navy);
  background:var(--paper);
  border:1px solid var(--rule);
  border-radius:2px;
  white-space:nowrap;
}

.tag--accent{
  color:#7A2E00;
  background:#FFF1E6;
  border-color:var(--orange);
}

.status-dot{
  display:inline-block;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 3px rgba(18,181,165,.18);
  flex:0 0 auto;
}

.status-dot--orange{
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,106,19,.18);
}

.mono{
  font-family:var(--font-mono);
  font-weight:500;
  font-variant-numeric:tabular-nums;
  letter-spacing:.01em;
}

/* ---------- 14. 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  background:linear-gradient(135deg,var(--navy) 0%,var(--navy-deep) 100%);
  border-radius:2px;
  isolation:isolate;
}

.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  background:
    linear-gradient(160deg,rgba(255,106,19,.22) 0%,rgba(255,106,19,0) 52%),
    linear-gradient(0deg,rgba(6,26,58,.55) 0%,rgba(6,26,58,0) 60%);
  pointer-events:none;
}

.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.media-frame--16x9{aspect-ratio:16 / 9;}
.media-frame--4x3{aspect-ratio:4 / 3;}

.media-frame--cut{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),calc(100% - 30px) 100%,0 100%);
}

.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.03em;
  line-height:1.6;
  color:var(--muted);
}

/* ---------- 15. 结构线 ---------- */
.rule{
  height:1px;
  background:var(--rule);
}

/* ---------- 16. 可展开内容组 ---------- */
.disclosure{
  background:var(--paper);
  border:1px solid var(--rule);
  border-radius:2px;
  overflow:hidden;
}

.disclosure + .disclosure{margin-top:10px;}

.disclosure-toggle{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  width:100%;
  padding:16px 18px;
  text-align:left;
  font-size:16px;
  font-weight:700;
  line-height:1.5;
  letter-spacing:-.01em;
  color:var(--navy);
  transition:background-color var(--dur) var(--ease);
}

.disclosure-toggle:hover{background:var(--cream);}

.disclosure-toggle[aria-expanded="true"]{
  border-bottom:1px solid var(--rule-soft);
  background:var(--cream);
}

.disclosure-icon{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:18px;
  font-weight:500;
  line-height:1;
  color:var(--orange);
  transition:transform var(--dur) var(--ease);
}

.disclosure-toggle[aria-expanded="true"] .disclosure-icon{transform:rotate(45deg);}

.disclosure-panel{
  padding:16px 18px 18px;
  font-size:15.5px;
  line-height:1.8;
  color:#40332A;
}

.disclosure-panel[hidden]{display:none;}

/* ---------- 17. 滚动进度与显现 ---------- */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  z-index:120;
  width:0;
  height:3px;
  background:var(--orange);
  pointer-events:none;
  transition:width .08s linear;
}

html.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 320ms var(--ease),transform 320ms var(--ease);
}

html.has-reveal [data-reveal].is-in{
  opacity:1;
  transform:none;
}

/* ---------- 18. 平板 ---------- */
@media (max-width:1080px){
  .header-meta{font-size:11.5px;}
  .meta-item{padding-inline:10px;}
  .nav-link{padding:14px 10px;font-size:14px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px 22px;}
  .footer-contact{grid-column:1 / -1;}
}

@media (max-width:980px){
  :root{--gutter:20px;}
  html{scroll-padding-top:112px;}

  .header-meta{display:none;}

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

  .primary-nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    z-index:90;
    background:var(--navy-deep);
    border-top:1px solid rgba(255,255,255,.14);
    box-shadow:0 18px 34px rgba(6,26,58,.38);
    max-height:calc(100vh - 108px);
    overflow-y:auto;
  }

  .site-header[data-open] .primary-nav{display:block;}

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    flex-wrap:nowrap;
  }

  .nav-item{display:block;}

  .nav-link{
    align-items:center;
    gap:12px;
    padding:15px 20px;
    font-size:15.5px;
    border-bottom:1px solid rgba(255,255,255,.1);
    border-left:0;
    border-left:3px solid transparent;
  }

  .nav-num{
    min-width:22px;
    font-size:12px;
  }

  .nav-link[aria-current="page"]{
    border-bottom-color:rgba(255,255,255,.1);
    border-left-color:#fff;
  }

  .header-nav-inner{align-items:center;}
  .header-cta{margin-block:8px;padding:10px 14px;font-size:13px;}

  .span-4,.span-5,.span-6,.span-7,.span-8{grid-column:span 12;}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}

  .section-index{font-size:38px;}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 20px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-contact{grid-column:1 / -1;}
  .footer-body{padding-block:40px 0;}
}

/* ---------- 19. 手机 ---------- */
@media (max-width:620px){
  :root{--gutter:18px;}
  body{font-size:16px;}

  .brand-name{font-size:18px;padding-left:9px;}
  .brand-tag{display:none;}
  .header-top-inner{min-height:42px;}

  .header-nav-inner{min-height:52px;gap:10px;}
  .header-cta{padding:9px 12px;font-size:12.5px;letter-spacing:0;}

  .nav-link{padding:14px 18px;font-size:15px;}

  .grid-12{grid-template-columns:1fr;gap:18px;}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 1;}

  .section-head{grid-template-columns:1fr;gap:6px;}
  .section-index{grid-row:auto;font-size:34px;}
  .lede{font-size:17px;}

  .surface{padding:20px;}

  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-brand-name{font-size:22px;}
  .footer-legal{flex-direction:column;align-items:flex-start;gap:8px;font-size:11.5px;}

  .media-frame--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%);}
}

/* ---------- 20. 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;
    scroll-behavior:auto !important;
  }

  html.has-reveal [data-reveal]{
    opacity:1;
    transform:none;
  }

  .scroll-progress{transition:none;}
}