/* =========================================================
   华体汇中心 · 共享样式 /assets/site.css
   基底：深墨蓝对照工作台 · 框架式导航 · 切角面板 · 数据纹理
   ========================================================= */

:root{
  --ink:#0E1B2A;
  --ink-deep:#0A131F;
  --navy-700:#16293D;
  --navy-bar:#0B1522;
  --line-blue:#24405A;
  --gray:#6E7681;
  --moss:#4F6B52;
  --moss-soft:#9DBFA1;
  --clay:#B4714F;
  --off:#F3EFE7;
  --off-soft:#DCD6CA;
  --cyan:#35E0D0;
  --amber:#F2A03D;
  --coral:#FF5F6D;

  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Songti SC","Source Han Serif SC","Noto Serif CJK SC",SimSun,Georgia,serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Roboto Mono","Courier New",monospace;

  --rail-w:72px;
  --maxw:1240px;
  --gutter:clamp(18px,4vw,44px);
  --progress:0;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;}

/* ---------- base / 中文排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(90deg,rgba(53,224,208,.045) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(0deg,rgba(53,224,208,.032) 0 1px,transparent 1px 72px);
  color:var(--off);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;letter-spacing:-.01em;line-height:1.14;}
.display{font-size:clamp(38px,7.6vw,104px);line-height:.98;letter-spacing:-.02em;font-weight:800;}
.h2{font-size:clamp(24px,3.4vw,42px);line-height:1.16;}
.h3{font-size:clamp(19px,2.2vw,26px);}
.h4{font-size:17px;}
.lede{font-family:var(--font-serif);font-weight:600;font-size:clamp(17px,1.6vw,21px);line-height:1.8;color:var(--off-soft);}
.body{max-width:68ch;line-height:1.85;color:var(--off-soft);}
.eyebrow{display:inline-block;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--clay);}
.mono{font-family:var(--font-mono);font-size:.92em;letter-spacing:.06em;}
.numeral{font-family:var(--font-display);font-weight:800;font-size:clamp(34px,5vw,64px);line-height:1;letter-spacing:-.02em;color:var(--cyan);}
.hl{border-bottom:1px solid var(--cyan);padding-bottom:1px;}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-220%);
  background:var(--cyan);color:#07131E;
  font-weight:700;font-size:14px;letter-spacing:.04em;
  padding:10px 18px;
  transition:transform .18s ease;
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0);}

/* ---------- 阅读进度 ---------- */
.progress-track{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:120;
  background:var(--navy-bar);
}
.progress-fill{
  display:block;height:100%;width:100%;
  transform-origin:0 50%;
  transform:scaleX(var(--progress));
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transition:transform .12s linear;
}

/* ---------- 左侧框架轨 ---------- */
.chapter-rail{display:none;}
.chapter-rail__mark{
  font-family:var(--font-mono);font-size:10px;line-height:1.3;
  letter-spacing:.14em;color:var(--cyan);text-align:center;
}
.rail-nav{display:flex;flex-direction:column;gap:2px;width:100%;flex:1 1 auto;justify-content:center;overflow:auto;}
.rail-nav__link{
  position:relative;display:flex;flex-direction:column;align-items:center;gap:5px;
  padding:10px 2px;color:var(--gray);
  transition:color .2s ease,background-color .2s ease;
}
.rail-nav__link::before{
  content:"";position:absolute;left:0;top:14%;bottom:14%;width:2px;background:transparent;
  transition:background-color .2s ease;
}
.rail-nav__link:hover{color:var(--off);background:rgba(53,224,208,.07);}
.rail-nav__link[aria-current="page"]{color:var(--off);}
.rail-nav__link[aria-current="page"]::before{background:var(--cyan);}
.rail-nav__code{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--clay);}
.rail-nav__link[aria-current="page"] .rail-nav__code{color:var(--amber);}
.rail-nav__text{font-size:11.5px;letter-spacing:.08em;white-space:nowrap;}
.chapter-rail__meter{position:relative;display:block;width:2px;height:88px;background:var(--line-blue);overflow:hidden;}
.chapter-rail__meter-fill{
  display:block;width:100%;height:100%;
  transform-origin:50% 100%;
  transform:scaleY(var(--progress));
  background:linear-gradient(180deg,var(--amber),var(--cyan));
}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:3px;z-index:90;
  background:var(--ink);
}
.status-bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:34px;padding:0 var(--gutter);
  background:var(--navy-bar);
  border-bottom:1px solid var(--line-blue);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--gray);
}
.status-bar__meta{display:flex;align-items:center;gap:10px;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.status-bar__ver{color:var(--amber);}
.status-bar__dot{width:6px;height:6px;flex:0 0 auto;border-radius:50%;background:var(--moss);box-shadow:0 0 0 3px rgba(79,107,82,.25);}
.status-bar__round{color:var(--gray);}
.status-bar__actions{display:flex;align-items:center;gap:16px;flex:0 0 auto;}
.status-link{
  color:var(--off);padding:2px 0;border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.status-link:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.status-link--coral{color:var(--coral);}
.status-link--coral:hover{color:var(--coral);border-bottom-color:var(--coral);}

.masthead{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px var(--gutter);
  background:linear-gradient(180deg,rgba(22,41,61,.92),rgba(14,27,42,.92));
  border-bottom:1px solid var(--line-blue);
}
.brand{display:flex;align-items:center;gap:12px;min-width:0;}
.brand__mark{
  display:grid;place-items:center;width:40px;height:40px;flex:0 0 auto;
  background:var(--cyan);color:#07131E;
  font-family:var(--font-display);font-weight:800;font-size:14px;letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% 68%,70% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;line-height:1.3;min-width:0;}
.brand__name{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:.02em;color:var(--off);}
.brand__tagline{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;color:var(--gray);}

.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 14px;
  border:1px solid var(--line-blue);
  background:rgba(36,64,90,.35);
  color:var(--off);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.nav-toggle::before{
  content:"";width:14px;height:2px;background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan);background:rgba(53,224,208,.12);}

.top-nav{background:var(--navy-bar);border-bottom:1px solid var(--line-blue);}
.top-nav__list{display:flex;align-items:stretch;padding:0 var(--gutter);overflow-x:auto;scrollbar-width:none;}
.top-nav__list::-webkit-scrollbar{display:none;}
.top-nav__item{flex:0 0 auto;}
.top-nav__link{
  display:block;padding:12px 18px;
  font-size:14px;font-weight:600;letter-spacing:.06em;color:var(--gray);
  border-bottom:2px solid transparent;
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.top-nav__link:hover{color:var(--off);background:rgba(53,224,208,.07);}
.top-nav__link[aria-current="page"]{color:var(--cyan);border-bottom-color:var(--cyan);}

/* ---------- 容器 / 区块 / 网格 ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter);}
.section{padding-block:clamp(44px,7vw,96px);}
.section--dark{background:var(--ink);}
.section--panel{background:var(--navy-700);border-block:1px solid var(--line-blue);}
.section--light{background:var(--off);color:#16202C;}
.section--light .lede,.section--light .body{color:#3A424C;}
.section--light .eyebrow{color:var(--clay);}
.section--light .numeral{color:#0E1B2A;}
.section--light .chip{background:rgba(22,32,44,.05);border-color:#CFC7B8;color:#4C5560;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:clamp(22px,3vw,38px);}

.grid{display:grid;gap:clamp(14px,2.2vw,26px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr));}
.stack > * + *{margin-top:16px;}
.rule{height:1px;border:0;background:var(--line-blue);}

/* ---------- 面板 / 标签 / 按钮 ---------- */
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:var(--navy-700);
  border:1px solid var(--line-blue);
}
.panel--cut{
  border:0;
  background:var(--navy-700);
  box-shadow:inset 0 0 0 1px var(--line-blue);
  clip-path:polygon(0 0,calc(100% - 16px) 0,100% 16px,100% 100%,16px 100%,0 calc(100% - 16px));
}
.panel--light{background:#FBF8F2;color:#16202C;border-color:#DAD2C4;}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;
  border:1px solid var(--line-blue);
  background:rgba(36,64,90,.32);
  color:var(--gray);
}
.chip--cyan{color:var(--cyan);border-color:rgba(53,224,208,.45);background:rgba(53,224,208,.1);}
.chip--amber{color:var(--amber);border-color:rgba(242,160,61,.45);background:rgba(242,160,61,.1);}
.chip--coral{color:var(--coral);border-color:rgba(255,95,109,.45);background:rgba(255,95,109,.12);}
.chip--moss{color:var(--moss-soft);border-color:rgba(79,107,82,.65);background:rgba(79,107,82,.25);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  font-family:var(--font-body);font-weight:700;font-size:15px;letter-spacing:.04em;
  border:1px solid transparent;
  transition:transform .16s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn--primary{background:var(--cyan);color:#07131E;clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));}
.btn--primary:hover{background:#5BF0E2;}
.btn--amber{background:var(--amber);color:#20150A;clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));}
.btn--amber:hover{background:#FFB65C;}
.btn--coral{background:var(--coral);color:#2A0509;clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));}
.btn--coral:hover{background:#FF7C88;}
.btn--ghost{border-color:var(--line-blue);background:rgba(36,64,90,.25);color:var(--off);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn--light{border-color:#16202C;color:#16202C;background:transparent;}
.btn--light:hover{background:#16202C;color:var(--off);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding-block:14px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--gray);
}
.breadcrumb__link{color:var(--gray);transition:color .2s ease;}
.breadcrumb__link:hover{color:var(--cyan);}
.breadcrumb__sep{color:var(--line-blue);}
.breadcrumb__current{color:var(--off);}
.breadcrumb--light .breadcrumb__current{color:#16202C;}
.breadcrumb--light .breadcrumb__link{color:#5A626C;}

/* ---------- 数据矩阵 ---------- */
.matrix-wrap{width:100%;overflow-x:auto;}
.matrix{width:100%;min-width:520px;font-size:14.5px;}
.matrix th,.matrix td{padding:12px 14px;border-bottom:1px solid var(--line-blue);text-align:left;vertical-align:top;}
.matrix thead th{
  position:sticky;top:0;z-index:2;
  background:var(--navy-bar);
  font-family:var(--font-mono);font-size:11.5px;font-weight:400;letter-spacing:.12em;text-transform:uppercase;
  color:var(--gray);
  border-bottom:1px solid var(--cyan);
}
.matrix tbody tr:hover{background:rgba(53,224,208,.05);}
.matrix td.is-num{font-family:var(--font-mono);color:var(--cyan);letter-spacing:.04em;}
.matrix--fixed-head{max-height:520px;}
.section--light .matrix th,.section--light .matrix td{border-bottom-color:#DAD2C4;}
.section--light .matrix thead th{background:#EFEAE0;color:#5A626C;border-bottom-color:var(--clay);}
.section--light .matrix td.is-num{color:#0E1B2A;}

/* ---------- 图片容器基础规则 ---------- */
.figure{margin:0;}
.figure__media{
  position:relative;overflow:hidden;
  background:linear-gradient(140deg,#16293D,#0E1B2A);
  border:1px solid var(--line-blue);
}
.figure__media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(45deg,rgba(53,224,208,.07) 0 2px,transparent 2px 14px);
}
.figure__media img{width:100%;height:100%;object-fit:cover;}
.figure__media--16x9{aspect-ratio:16/9;}
.figure__media--4x3{aspect-ratio:4/3;}
.figure__media--1x1{aspect-ratio:1/1;}
.figure__media--wide{aspect-ratio:21/9;}
.figure__caption{margin-top:10px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--gray);}
.section--light .figure__caption{color:#5A626C;}

/* ---------- 滚动显现 ---------- */
.js-ready [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease;}
.js-ready [data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-deep);
  border-top:1px solid var(--line-blue);
  color:var(--gray);
  padding-top:clamp(30px,4vw,48px);
}
.site-footer::before{
  content:"";display:block;height:8px;margin-bottom:clamp(24px,3vw,40px);
  background-image:repeating-linear-gradient(115deg,rgba(53,224,208,.55) 0 2px,transparent 2px 16px);
  opacity:.55;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
}
.footer-brand__name{font-family:var(--font-display);font-weight:800;font-size:22px;letter-spacing:.01em;color:var(--off);}
.footer-brand__tagline{margin-top:6px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--cyan);}
.footer-brand__note{margin-top:12px;max-width:34ch;font-size:13.5px;line-height:1.85;color:var(--gray);}
.footer-col__title{
  padding-bottom:10px;margin-bottom:12px;
  font-family:var(--font-mono);font-size:11.5px;font-weight:400;letter-spacing:.18em;text-transform:uppercase;
  color:var(--off);
  border-bottom:1px solid var(--line-blue);
}
.footer-col__list{display:flex;flex-direction:column;gap:9px;}
.footer-link{font-size:14.5px;color:var(--gray);transition:color .2s ease;}
.footer-link:hover{color:var(--cyan);}
.footer-meta{
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px 24px;
  margin-top:clamp(28px,4vw,48px);padding-top:18px;
  border-top:1px solid var(--line-blue);
}
.footer-contact{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.03em;line-height:1.9;color:var(--gray);}
.footer-legal{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--clay);}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:20px;padding:18px 0 26px;
  border-top:1px dashed rgba(36,64,90,.9);
}
.footer-base__note{font-family:var(--font-serif);font-weight:600;font-size:14.5px;color:#CFC8BB;}
.footer-return{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--cyan);
  padding:8px 14px;border:1px solid rgba(53,224,208,.4);
  transition:background-color .2s ease,border-color .2s ease;
}
.footer-return:hover{background:rgba(53,224,208,.12);border-color:var(--cyan);}
.footer-base__year{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--gray);}

/* ---------- 响应式 ---------- */
@media (min-width:1080px){
  body{padding-left:var(--rail-w);}
  .progress-track{left:var(--rail-w);}
  .chapter-rail{
    position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:100;
    display:flex;flex-direction:column;align-items:center;gap:16px;
    padding:16px 0 20px;
    background:linear-gradient(180deg,#0B1522,#122336 42%,#0B1522);
    border-right:1px solid var(--line-blue);
  }
}

@media (min-width:860px){
  .nav-toggle{display:none;}
}

@media (max-width:859px){
  .top-nav{display:none;}
  .top-nav[data-open]{
    display:block;position:absolute;left:0;right:0;top:100%;z-index:95;
    border-bottom:1px solid var(--cyan);
    box-shadow:0 20px 44px rgba(0,0,0,.5);
  }
  .top-nav[data-open] .top-nav__list{flex-direction:column;padding:8px var(--gutter) 16px;overflow:visible;}
  .top-nav[data-open] .top-nav__link{padding:14px 4px;font-size:16px;border-bottom:1px solid var(--line-blue);border-left:2px solid transparent;}
  .top-nav[data-open] .top-nav__link[aria-current="page"]{border-bottom-color:var(--line-blue);border-left-color:var(--cyan);background:rgba(53,224,208,.07);}
  .status-bar__round{display:none;}
}

@media (max-width:980px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:620px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr;}
  .status-bar{font-size:11px;letter-spacing:.05em;gap:8px;}
  .status-bar__actions{gap:12px;}
  .brand__tagline{font-size:10px;}
  .masthead{padding-block:12px;}
  .footer-base{flex-direction:column;align-items:flex-start;}
}

@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .btn:hover{transform:none;}
  .js-ready [data-reveal]{opacity:1;transform:none;}
  .progress-fill{transition:none;}
}