/* PHYSIS · web edition
   排版用 CSS 网格手工定位：宽字距大写拉丁标题 + 竖排年代 + 双栏正文。 */

:root{
  --paper:#f3efe6;
  /* 深底主题: ink 系列是浅色。之前误写成深色, 顶栏副标题与遥测全部看不见 */
  --ink:#f3efe6;
  --ink-dim:rgba(243,239,230,.62);
  --ink-faint:rgba(243,239,230,.36);
  --accent:#e0a34a;
  --pad:clamp(18px,3.4vw,54px);
  --serif:"Constantia","Cambria","Georgia","Book Antiqua","Songti SC","SimSun",serif;
  --sans:"Segoe UI","Helvetica Neue","Arial","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"Cascadia Mono","Consolas","SF Mono","Menlo","Courier New",monospace;
}

*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%;overflow:hidden;background:#05070a;overflow-x:hidden}
body{
  font-family:var(--sans);
  color:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

#gl{position:fixed;inset:0;width:100%;height:100%;display:block;background:#05070a}

/* 文字层压暗罩：确保任何亮场景下文字都可读 */
#veil{
  position:fixed;inset:0;pointer-events:none;
  background:
    linear-gradient(to top, rgba(4,6,9,.95) 0%, rgba(4,6,9,.86) 18%, rgba(4,6,9,.44) 40%, rgba(4,6,9,0) 62%),
    linear-gradient(to right, rgba(4,6,9,.88) 0%, rgba(4,6,9,.46) 30%, rgba(4,6,9,.06) 54%, rgba(4,6,9,0) 66%),
    radial-gradient(120% 90% at 50% 42%, rgba(0,0,0,0) 38%, rgba(0,0,0,.60) 100%);
}

#ui{
  position:fixed;inset:0;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.92fr);
  grid-template-rows:auto 1fr auto;
  grid-template-areas:
    "top    top"
    "main   body"
    "bottom bottom";
  padding:var(--pad);
  gap:0 40px;
  pointer-events:none;
}
#ui > *{pointer-events:auto}

/* ---------------------------------------------------------------- 顶栏 */
.bar.top{
  grid-area:top;
  display:flex;align-items:baseline;gap:22px;
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  padding-bottom:14px;
  border-bottom:1px solid rgba(243,239,230,.16);
}
.idx{display:flex;align-items:baseline;gap:5px;font-size:13px;letter-spacing:.04em}
.idx i{font-style:normal;color:var(--ink-faint);margin:0 3px}
.idx .dim{color:var(--ink-faint)}
.brand{display:flex;align-items:baseline;gap:14px;flex:1;min-width:0}
.brand .mark{letter-spacing:.42em;font-weight:600}
.brand .sub{color:var(--ink-faint);letter-spacing:.24em;font-family:var(--sans);font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tele{color:var(--ink-faint);white-space:nowrap;font-size:10px;letter-spacing:.12em;font-variant-numeric:tabular-nums}

/* ---------------------------------------------------------------- 左侧标题 */
.titleblock{
  grid-area:main;
  align-self:end;
  min-width:0;
  padding-bottom:6px;
}
.kicker{
  font-family:var(--mono);font-size:11px;letter-spacing:.30em;text-transform:uppercase;
  color:var(--accent);
  display:flex;align-items:center;gap:12px;
  margin-bottom:clamp(10px,1.4vw,20px);
}
.kicker::after{content:"";height:1px;flex:0 0 clamp(28px,7vw,120px);background:linear-gradient(to right,var(--accent),transparent)}

.en{
  max-width:100%;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(40px,7.6vw,132px);
  line-height:.86;
  letter-spacing:.012em;
  text-transform:uppercase;
  word-break:keep-all;
  overflow-wrap:normal;
  white-space:nowrap;
  text-shadow:0 2px 40px rgba(0,0,0,.55);
}
.zh-row{display:flex;align-items:center;gap:clamp(10px,1.4vw,20px);margin-top:clamp(12px,1.6vw,24px);flex-wrap:wrap}
.zh{
  font-family:var(--serif);
  font-size:clamp(17px,2.05vw,30px);
  letter-spacing:.22em;
  color:rgba(243,239,230,.94);
  white-space:nowrap;
}
.rule{flex:1 1 40px;height:1px;min-width:24px;background:rgba(243,239,230,.22)}
.fig{
  display:block;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.20em;text-transform:uppercase;
  color:rgba(243,239,230,.52);white-space:nowrap;
  margin-top:clamp(10px,1.1vw,16px);
}

/* ---------------------------------------------------------------- 右侧正文 */
.bodyblock{
  grid-area:body;
  align-self:end;
  min-width:0;
  padding-bottom:6px;
}
.formula{
  font-family:var(--mono);
  font-size:clamp(11px,1.02vw,13.5px);
  line-height:1.72;
  color:rgba(243,239,230,.88);
  letter-spacing:.02em;
  border-left:2px solid var(--accent);
  padding:2px 0 2px 14px;
  margin-bottom:clamp(14px,1.8vw,26px);
  word-break:break-word;
}
.cols{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(14px,1.8vw,28px);
  font-size:clamp(12px,.92vw,14px);
  line-height:1.85;
  color:rgba(243,239,230,.66);
  text-align:justify;
  text-justify:inter-ideograph;
  hyphens:auto;
}
.cols p{text-indent:2em}

/* ---------------------------------------------------------------- 右侧竖排年代 */
.margin{display:none}
.vmeta{
  writing-mode:vertical-rl;
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.34em;
  text-transform:uppercase;
  color:rgba(243,239,230,.42);
  white-space:nowrap;
}

/* ---------------------------------------------------------------- 底栏 */
.bar.bottom{
  grid-area:bottom;
  display:flex;align-items:center;gap:clamp(14px,2vw,30px);
  padding-top:14px;
  border-top:1px solid rgba(243,239,230,.16);
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;
}
.ticks{display:flex;align-items:center;gap:6px;flex:1;min-width:0}
.ticks .t{
  flex:1 1 0;height:2px;min-width:4px;
  background:rgba(243,239,230,.20);
  position:relative;
  cursor:pointer;
  transition:background .35s ease,transform .35s ease;
  transform-origin:center;
}
.ticks .t:hover{background:rgba(243,239,230,.52)}
.ticks .t.done{background:rgba(243,239,230,.40)}
.ticks .t.on{background:var(--accent);height:3px}
.ctrl{display:flex;gap:4px}
.ctrl button{
  font-family:var(--mono);font-size:12px;line-height:1;
  width:30px;height:26px;
  background:transparent;color:rgba(243,239,230,.68);
  border:1px solid rgba(243,239,230,.20);
  cursor:pointer;transition:color .2s,border-color .2s,background .2s;
}
.ctrl button:hover{color:var(--paper);border-color:rgba(243,239,230,.55);background:rgba(243,239,230,.07)}
.ctrl button:active{background:rgba(243,239,230,.16)}
.badge{
  display:flex;align-items:center;gap:7px;
  color:rgba(243,239,230,.50);
  white-space:nowrap;
}
.badge .dot{width:5px;height:5px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent)}

/* ---------------------------------------------------------------- 转场 */
#ui{transition:opacity .5s ease}
#ui.fade .titleblock,#ui.fade .bodyblock,#ui.fade .margin{opacity:.0;filter:blur(3px)}
.titleblock,.bodyblock,.margin{transition:opacity .42s ease,filter .42s ease,transform .42s ease}
.titleblock{transform:translateY(0)}
#ui.fade .titleblock{transform:translateY(10px)}

/* ---------------------------------------------------------------- 启动屏 */
#boot{
  position:fixed;inset:0;z-index:20;
  background:#05070a;
  display:flex;align-items:center;justify-content:center;
  transition:opacity .8s ease,visibility .8s;
}
#boot.gone{opacity:0;visibility:hidden}
.boot-inner{width:min(420px,80vw);text-align:center}
.boot-title{
  font-family:var(--serif);font-size:clamp(30px,5vw,52px);letter-spacing:.44em;
  text-indent:.44em;color:var(--paper);margin-bottom:14px;
}
.boot-sub{font-family:var(--mono);font-size:10px;letter-spacing:.28em;color:rgba(243,239,230,.42);text-transform:uppercase}
.boot-bar{height:1px;background:rgba(243,239,230,.16);margin:26px 0 12px;overflow:hidden}
.boot-bar i{display:block;height:100%;width:0%;background:var(--accent);transition:width .3s ease}
.boot-log{
  font-family:var(--mono);font-size:9.5px;line-height:1.6;letter-spacing:.06em;
  color:rgba(243,239,230,.34);text-align:left;height:70px;overflow:hidden;
  white-space:pre-wrap;word-break:break-all;
}

/* ---------------------------------------------------------------- 窄屏 */
@media (max-width:900px){
  #ui{
    /* 必须是 minmax(0,1fr): 纯 1fr 的最小尺寸是 auto, 标题的 nowrap 会把整列撑爆 */
    grid-template-columns:minmax(0,1fr);
    grid-template-areas:"top" "main" "body" "bottom";
    grid-template-rows:auto 1fr auto auto;
    gap:0;
  }
  .cols{grid-template-columns:1fr;gap:0}
  .cols p:nth-child(2){display:none}
  .bar.top{gap:12px}
  .brand .sub{display:none}
  .fig{display:none}
  .en{font-size:clamp(34px,11.5vw,64px)}
  #veil{background:
    linear-gradient(to top, rgba(4,6,9,.96) 0%, rgba(4,6,9,.80) 42%, rgba(4,6,9,.10) 78%),
    radial-gradient(120% 90% at 50% 34%, rgba(0,0,0,0) 30%, rgba(0,0,0,.6) 100%);
  }
  .badge{display:none}
}

@media (max-width:640px){
  .tele{display:none}
  .bar.top{gap:10px}
  .cols p{text-indent:0}
  .formula{font-size:10.5px}
}

@media (max-height:560px){
  .cols p:nth-child(2){display:none}
  .zh-row{margin-top:8px}
}