/* =========================================================
   竞博看台 · 共享样式表 /assets/site.css
   深夜看台 × 数据仪表盘：岩灰刻度、电光青交互、信号橙价格
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root{
  --navy:#0B1B33;
  --navy-2:#14294A;
  --cyan:#2FD8D0;
  --cyan-deep:#1C8F8C;
  --orange:#FF6A2B;
  --orange-soft:#FF9A5C;
  --warm:#F4EFE6;
  --paper:#FBF7F0;
  --rock:#6E7580;
  --moss:#4F6B4A;
  --clay:#B4633E;
  --ink:#14181F;

  --line:rgba(20,24,31,.13);
  --line-strong:rgba(20,24,31,.28);
  --line-dark:rgba(244,239,230,.14);
  --line-cyan:rgba(47,216,208,.28);

  --font-sans:"PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --header-h:72px;
  --shell:min(1240px,100% - 2.5rem);
  --gutter:clamp(1rem,4vw,2rem);
  --ease:180ms ease;
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
}
body{
  margin:0;
  background:var(--warm);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px}
.site-header :focus-visible,
.site-footer :focus-visible{outline-color:var(--cyan)}

@media (max-width:700px){
  :root{--header-h:60px;--shell:min(1240px,100% - 2rem)}
}

/* ---------- 3. 工具类 ---------- */
.container{width:var(--shell);margin-inline:auto}
.page-shell{padding-top:var(--header-h)}
.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;
}

/* ---------- 4. 排版 ---------- */
.display-1{font-size:56px;font-weight:200;line-height:1.1;letter-spacing:-.02em}
.display-2{font-size:40px;font-weight:200;line-height:1.16;letter-spacing:-.015em}
.display-3{font-size:28px;font-weight:300;line-height:1.3;letter-spacing:-.01em}
@media (max-width:900px){
  .display-1{font-size:clamp(2.1rem,8vw,3.5rem)}
  .display-2{font-size:clamp(1.6rem,6vw,2.5rem)}
  .display-3{font-size:clamp(1.25rem,4.4vw,1.75rem)}
}
@media (min-width:901px){
  .display-1{font-size:clamp(2.6rem,5.4vw,3.5rem)}
  .display-2{font-size:clamp(1.9rem,3.6vw,2.5rem)}
  .display-3{font-size:clamp(1.4rem,2.2vw,1.75rem)}
}

.eyebrow{
  display:block;
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.6;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--rock);
}
.eyebrow--on-dark{color:rgba(244,239,230,.5)}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.01em;
}
.num--lg{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:700;line-height:1;color:var(--clay)}

.note{
  font-size:14px;
  line-height:1.75;
  color:var(--rock);
  border-left:2px solid var(--line-strong);
  padding-left:.9rem;
}
.section--dark .note,
.site-footer .note{color:rgba(244,239,230,.62);border-left-color:var(--line-cyan)}

/* ---------- 5. 章节与容器 ---------- */
.section{padding-block:clamp(2.5rem,6vw,5rem)}
.section--dark{background:var(--navy);color:var(--warm)}
.section--warm{background:var(--warm)}
.section--paper{background:var(--paper)}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(1.25rem,3vw,2rem)}
.col-narrow,.col-wide,.col-half{grid-column:1 / -1}
@media (min-width:900px){
  .col-narrow{grid-column:span 3}
  .col-wide{grid-column:span 9}
  .col-half{grid-column:span 6}
}

/* ---------- 6. 分隔线与标签 ---------- */
.rule{height:1px;background:var(--line);margin-block:1.5rem}
.rule--ticks{
  height:10px;
  background:none;
  border-bottom:1px solid var(--line);
  background-image:
    repeating-linear-gradient(90deg,rgba(110,117,128,.55) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(90deg,rgba(110,117,128,.85) 0 1px,transparent 1px 120px);
  background-repeat:repeat-x,repeat-x;
  background-size:auto 6px,auto 10px;
  background-position:left bottom,left bottom;
}
.section--dark .rule--ticks,
.site-footer .rule--ticks{
  border-bottom-color:var(--line-dark);
  background-image:
    repeating-linear-gradient(90deg,rgba(47,216,208,.4) 0 1px,transparent 1px 24px),
    repeating-linear-gradient(90deg,rgba(47,216,208,.7) 0 1px,transparent 1px 120px);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.1rem .5rem;
  border:2px solid transparent;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.7;
  letter-spacing:.08em;
  white-space:nowrap;
}
.tag--moss{color:var(--moss);border-color:rgba(79,107,74,.5);background:rgba(79,107,74,.09)}
.tag--clay{color:var(--clay);border-color:rgba(180,99,62,.5);background:rgba(180,99,62,.09)}
.tag--cyan{color:var(--cyan-deep);border-color:var(--line-cyan);background:rgba(47,216,208,.09)}
.tag--orange{color:#B4470F;border-color:rgba(255,106,43,.55);background:rgba(255,106,43,.1)}
.section--dark .tag--cyan{color:var(--cyan)}
.section--dark .tag--orange{color:var(--orange-soft)}
.section--dark .tag--moss{color:#A8C6A2;border-color:rgba(168,198,162,.45);background:rgba(168,198,162,.1)}
.section--dark .tag--clay{color:#E3A585;border-color:rgba(227,165,133,.45);background:rgba(227,165,133,.1)}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.75rem 1.15rem;
  border:2px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.06em;
  text-align:center;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease);
}
.btn--primary{background:var(--orange);border-color:var(--orange);color:var(--navy)}
.btn--primary:hover{background:var(--orange-soft);border-color:var(--orange-soft)}
.btn--ghost{border-color:var(--line-cyan);color:var(--cyan);background:rgba(47,216,208,.06)}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(47,216,208,.14)}
.btn--outline{border-color:var(--line-strong);color:var(--ink);background:transparent}
.btn--outline:hover{border-color:var(--ink);background:rgba(20,24,31,.05)}

/* ---------- 8. 卡片、状态与数据块 ---------- */
.card{background:var(--paper);border:1px solid var(--line);padding:1.25rem}
.card--paper{background:var(--paper);border:1px solid var(--line)}
.card--stacked{
  background:var(--paper);
  border:1px solid var(--line);
  box-shadow:6px 6px 0 rgba(11,27,51,.07),12px 12px 0 rgba(11,27,51,.035);
}
.section--dark .card,
.section--dark .card--paper,
.section--dark .card--stacked{background:var(--navy-2);border-color:var(--line-dark);color:var(--warm)}

.stat{display:flex;flex-direction:column;gap:.3rem}
.stat__num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(1.5rem,3.2vw,2.25rem);font-weight:700;line-height:1;color:var(--ink)}
.stat__label{font-size:13px;letter-spacing:.08em;color:var(--rock)}
.section--dark .stat__num{color:var(--warm)}
.section--dark .stat__label{color:rgba(244,239,230,.55)}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.4rem;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--rock);
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:.4rem}
.breadcrumbs__item + .breadcrumbs__item::before{content:"/";color:rgba(110,117,128,.55)}
.breadcrumbs a:hover{color:var(--clay);text-decoration:underline;text-underline-offset:3px}

/* ---------- 10. 图片容器（供页面阶段放置图片） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  background:var(--navy-2);
  border:1px solid var(--line);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(47,216,208,.12) 1px,transparent 1px),
    linear-gradient(90deg,rgba(47,216,208,.12) 1px,transparent 1px);
  background-size:32px 32px;
  z-index:1;
}
.media-frame__img{width:100%;height:100%;object-fit:cover;position:relative;z-index:2}
.media-frame__grid{position:absolute;inset:0;z-index:0;background:radial-gradient(120% 90% at 20% 0%,rgba(47,216,208,.18),transparent 60%)}
.media-frame__caption{
  position:absolute;
  left:0;
  bottom:0;
  z-index:3;
  padding:.3rem .6rem;
  background:rgba(11,27,51,.86);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
}
.media-frame--wide{aspect-ratio:16 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}

/* ---------- 11. 日期泳道基础（横向位移容器） ---------- */
.lane{
  display:flex;
  gap:.5rem;
  overflow-x:auto;
  overflow-y:hidden;
  scroll-snap-type:x proximity;
  scrollbar-width:thin;
  scrollbar-color:var(--cyan-deep) transparent;
  padding-bottom:.5rem;
  -webkit-overflow-scrolling:touch;
}
.lane::-webkit-scrollbar{height:6px}
.lane::-webkit-scrollbar-thumb{background:var(--cyan-deep)}
.lane::-webkit-scrollbar-track{background:rgba(110,117,128,.18)}
.lane__item{flex:0 0 auto;scroll-snap-align:start}

/* ---------- 12. 章节目录跟随 ---------- */
[data-spy-link]{transition:color var(--ease)}
[data-spy-link][data-active]{color:var(--clay);font-weight:600}
.section--dark [data-spy-link][data-active]{color:var(--cyan)}

/* ---------- 13. 头部 ---------- */
.skip-link{
  position:fixed;
  left:1rem;
  top:-120px;
  z-index:200;
  padding:.6rem 1rem;
  background:var(--orange);
  color:var(--navy);
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  transition:top var(--ease);
}
.skip-link:focus{top:.75rem}

.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:90;
  color:var(--warm);
  background-image:linear-gradient(180deg,rgba(11,27,51,.97) 0%,rgba(11,27,51,.86) 62%,rgba(11,27,51,0) 100%);
  border-bottom:1px solid transparent;
  transition:background-color var(--ease),border-color var(--ease);
}
.site-header.is-solid{
  background-image:none;
  background-color:rgba(11,27,51,.97);
  border-bottom-color:var(--line-cyan);
  -webkit-backdrop-filter:blur(10px) saturate(140%);
  backdrop-filter:blur(10px) saturate(140%);
}

.site-header__inner{
  width:var(--shell);
  margin-inline:auto;
  height:var(--header-h);
  display:flex;
  align-items:center;
  gap:clamp(.6rem,2vw,1.5rem);
}

.brand{display:flex;align-items:center;gap:.7rem;flex:0 0 auto;min-width:0}
.brand__mark{
  flex:none;
  width:10px;
  height:26px;
  background:var(--cyan);
  box-shadow:6px 0 0 0 var(--orange);
  margin-right:6px;
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand__name{font-size:17px;font-weight:600;letter-spacing:.2em;color:var(--warm);white-space:nowrap}
.brand__tagline{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:rgba(244,239,230,.5);
  white-space:nowrap;
}

.site-nav{
  flex:1 1 auto;
  min-width:0;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.site-nav::-webkit-scrollbar{display:none}
.nav-list{display:flex;align-items:center;gap:.15rem}
.nav-list__item{flex:0 0 auto}
.nav-link{
  position:relative;
  display:inline-block;
  padding:.55rem .7rem;
  font-size:15px;
  letter-spacing:.04em;
  color:rgba(244,239,230,.72);
  white-space:nowrap;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:.7rem;
  right:.7rem;
  bottom:.28rem;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--warm)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--cyan)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.site-header__end{display:flex;align-items:center;gap:.6rem;margin-left:auto;flex:0 0 auto}

.price-chip{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.4rem .7rem;
  border:2px solid rgba(255,106,43,.72);
  background:rgba(255,106,43,.09);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  white-space:nowrap;
  transition:background-color var(--ease),border-color var(--ease);
}
.price-chip:hover{background:rgba(255,106,43,.2);border-color:var(--orange)}
.price-chip__dot{flex:none;width:6px;height:6px;background:var(--orange)}
.price-chip__text{color:var(--orange);font-weight:700}
.price-chip__meta{color:var(--orange-soft)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.45rem .6rem;
  border:2px solid var(--line-cyan);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
}
.nav-toggle__icon{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:18px;height:14px}
.nav-toggle__icon i{display:block;height:2px;background:currentColor;transition:transform var(--ease),opacity var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  pointer-events:none;
}

@media (max-width:1279px){
  .price-chip__meta{display:none}
}
@media (max-width:1023px){
  .brand__tagline{display:none}
  .brand__name{letter-spacing:.14em;font-size:16px}
  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    flex:none;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    background:var(--navy);
    border-top:1px solid var(--line-cyan);
    border-bottom:1px solid var(--line-cyan);
    padding-inline:clamp(1rem,5vw,1.75rem);
    transition:max-height var(--ease),visibility var(--ease),padding var(--ease);
  }
  .site-nav[data-open]{
    max-height:70vh;
    overflow-y:auto;
    visibility:visible;
    padding-block:.5rem 1.1rem;
    box-shadow:0 18px 30px -18px rgba(0,0,0,.7);
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{display:block;padding:.9rem .15rem;font-size:16px;border-bottom:1px solid var(--line-dark)}
  .nav-link::after{left:.15rem;right:auto;width:24px;bottom:.6rem}
  .nav-toggle{display:inline-flex}
}
@media (max-width:420px){
  .price-chip{font-size:11px;padding:.35rem .5rem;gap:.4rem}
  .brand__mark{height:22px}
}

/* ---------- 14. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,7vw,6rem);
  background:var(--navy);
  color:rgba(244,239,230,.76);
}
.footer__ruler{
  height:12px;
  border-top:1px solid var(--line-cyan);
  background-image:
    repeating-linear-gradient(90deg,rgba(47,216,208,.55) 0 1px,transparent 1px 112px),
    repeating-linear-gradient(90deg,rgba(244,239,230,.2) 0 1px,transparent 1px 28px);
  background-repeat:repeat-x,repeat-x;
  background-size:auto 12px,auto 6px;
  background-position:left top,left top;
}
.footer__inner{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(1.75rem,4vw,2.5rem);
  padding-block:clamp(2.25rem,5vw,3.75rem);
}
.footer__brand-name{
  font-size:18px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--warm);
  margin-bottom:.35rem;
}
.footer__brand-line{font-size:14px;color:rgba(244,239,230,.6);margin-bottom:.9rem}
.footer__domain{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--cyan);
}
.footer__col-title{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.22em;
  color:rgba(47,216,208,.85);
  margin-bottom:.85rem;
}
.footer__list{display:flex;flex-direction:column;gap:.55rem}
.footer__link{
  font-size:14px;
  color:rgba(244,239,230,.72);
  transition:color var(--ease);
}
.footer__link:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:4px}

.footer__bottom{
  border-top:1px solid var(--line-dark);
  padding-block:1.5rem 3.5rem;
  display:grid;
  gap:.45rem;
}
.footer__bottom-line{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:rgba(244,239,230,.62)}
.footer__contact{font-size:13px;color:rgba(244,239,230,.6);word-break:break-word}
.footer__meta{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem 1.25rem;
  margin-top:.4rem;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(244,239,230,.45);
}
.footer__icp,
.footer__region,
.footer__copyright{display:inline-block}

.to-top{
  position:fixed;
  right:1rem;
  bottom:1rem;
  z-index:80;
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.6rem .8rem;
  background:var(--navy-2);
  border:2px solid var(--line-cyan);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),background-color var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:#1B3560}
.to-top__icon{
  display:block;
  width:9px;
  height:9px;
  border-top:2px solid currentColor;
  border-left:2px solid currentColor;
  transform:rotate(45deg) translate(1px,1px);
}
.to-top__label{line-height:1}

@media (min-width:720px){
  .footer__inner{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__brand{grid-column:1 / -1}
}
@media (min-width:1080px){
  .footer__inner{grid-template-columns:1.5fr repeat(4,minmax(0,1fr));gap:2rem}
  .footer__brand{grid-column:auto}
  .footer__bottom{
    grid-template-columns:1fr auto;
    align-items:baseline;
    column-gap:2rem;
  }
  .footer__bottom-line{grid-column:1 / -1}
  .footer__contact{grid-column:1}
  .footer__meta{grid-column:1;margin-top:.2rem}
}

/* ---------- 15. 无障碍与动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  .to-top{transform:none}
  .nav-link:hover::after{transform:scaleX(1)}
}