/* =========================================================
   米乐赛场 · 共享站点样式 /assets/site.css
   夜间球场灯光 × 数据控制室
   ========================================================= */

:root{
  /* 品牌色板 */
  --ink-900:#0B1F1A;
  --ink-800:#12332B;
  --moss:#2F6B57;
  --cyan:#39F2D0;
  --orange:#FF6B2C;
  --paper:#F4EFE6;
  --data-blue:#8FA6B8;
  --rock:#4A5552;
  --cream:#E8DFD1;
  --text-dark:#07110E;

  /* 语义色 */
  --bg:var(--ink-900);
  --bg-alt:var(--ink-800);
  --text:#E3EBE7;
  --text-muted:#9FB2AC;
  --line:rgba(57,242,208,.18);
  --line-strong:rgba(57,242,208,.42);
  --line-soft:rgba(74,85,82,.55);

  /* 字体 */
  --font-display:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-display);
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  /* 字号阶梯 12 / 14 / 16 / 20 / 28 / 40 / 64 / 96 */
  --step-12:12px;
  --step-14:14px;
  --step-16:16px;
  --step-20:20px;
  --step-28:28px;
  --step-40:40px;
  --step-64:64px;
  --step-96:96px;

  /* 布局 */
  --wrap:1180px;
  --gutter:clamp(18px,4vw,44px);
  --radius:14px;
  --radius-pill:999px;
  --dur:.26s;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ------------------------- Reset ------------------------- */
*,
*::before,
*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:104px;
  background:var(--ink-900);
}

body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font-family:var(--font-body);
  font-size:var(--step-16);
  font-weight:400;
  line-height:1.8;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
  background:
    radial-gradient(1180px 620px at 10% -12%, rgba(47,107,87,.42), transparent 62%),
    radial-gradient(900px 520px at 92% -4%, rgba(57,242,208,.10), transparent 64%),
    radial-gradient(760px 520px at 50% 108%, rgba(255,107,44,.06), transparent 68%),
    var(--ink-900);
  background-attachment:fixed;
}

h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{ margin:0; }
ul,ol{ margin:0; padding:0; }
li{ list-style:none; }
img,svg,video{ display:block; max-width:100%; }
button{ font:inherit; color:inherit; background:none; border:0; }
a{ color:inherit; text-decoration:none; }
input,textarea,select{ font:inherit; }
table{ border-collapse:collapse; width:100%; }

::selection{ background:var(--cyan); color:#061A15; }

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

/* --------------------- 中文排版基线 --------------------- */
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.14;
  letter-spacing:.015em;
  color:var(--paper);
  text-wrap:balance;
}

h1{ font-size:clamp(34px,5.4vw,64px); }
h2{ font-size:clamp(26px,3.6vw,40px); }
h3{ font-size:clamp(20px,2.4vw,28px); }
h4{ font-size:var(--step-20); }

p{ margin:0 0 1em; text-wrap:pretty; }
p:last-child{ margin-bottom:0; }

strong,b{ font-weight:700; color:var(--paper); }
small{ font-size:var(--step-12); letter-spacing:.1em; }
hr{ border:0; border-top:1px solid var(--line-soft); margin:clamp(28px,4vw,52px) 0; }

/* --------------------- 通用工具类 --------------------- */
.container{
  display:block;
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
  font-weight:600;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:var(--step-12);
  letter-spacing:.24em;
  line-height:1.6;
  color:var(--cyan);
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:20px;
  height:2px;
  background:var(--cyan);
  flex:0 0 auto;
}

.section{ padding-block:clamp(40px,6vw,88px); }
.section__head{
  display:grid;
  gap:14px;
  max-width:64ch;
  margin-bottom:clamp(22px,3.4vw,40px);
}
.section__title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.16;
  letter-spacing:.015em;
  color:var(--paper);
  margin:0;
}

.band{
  background:linear-gradient(180deg, rgba(18,51,43,.94), rgba(11,31,26,.94));
  border-block:1px solid var(--line);
}

/* --------------------- 通用网格 --------------------- */
.grid{
  display:grid;
  gap:clamp(16px,2.6vw,30px);
}
.grid--2{ grid-template-columns:repeat(2, minmax(0,1fr)); }
.grid--3{ grid-template-columns:repeat(3, minmax(0,1fr)); }

@media (max-width:860px){
  .grid--2,
  .grid--3{ grid-template-columns:minmax(0,1fr); }
}

/* --------------------- 通用按钮 --------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 24px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  letter-spacing:.06em;
  line-height:1.2;
  cursor:pointer;
  transition:background var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.btn--primary{
  background:var(--cyan);
  color:#08201A;
  border-color:rgba(57,242,208,.85);
  box-shadow:0 0 0 1px rgba(57,242,208,.16);
}
.btn--primary:hover{ box-shadow:0 0 24px -6px rgba(57,242,208,.7); transform:translateY(-1px); }
.btn--ghost{
  background:transparent;
  color:var(--paper);
  border-color:rgba(57,242,208,.45);
}
.btn--ghost:hover{
  color:var(--cyan);
  border-color:var(--cyan);
  transform:translateY(-1px);
}

/* --------------------- 章节胶囊标签 --------------------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 11px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(143,166,184,.45);
  background:rgba(143,166,184,.12);
  color:#C9DAE6;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  line-height:1.5;
  white-space:nowrap;
}
.tag--live{
  border-color:rgba(255,107,44,.75);
  background:rgba(255,107,44,.13);
  color:#FFB792;
}
.tag--live::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 0 3px rgba(255,107,44,.22);
  flex:0 0 auto;
}
.tag--data{
  border-color:rgba(57,242,208,.55);
  background:rgba(57,242,208,.10);
  color:var(--cyan);
}

/* --------------------- 纸张叠层卡 --------------------- */
.paper-card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border-radius:var(--radius);
  background:linear-gradient(180deg, var(--paper), var(--cream));
  color:var(--text-dark);
  border:1px solid rgba(74,85,82,.32);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.5),
    0 20px 38px -30px rgba(0,0,0,.95);
}
.paper-card::after{
  content:"";
  position:absolute;
  inset:8px;
  border:1px solid rgba(74,85,82,.18);
  border-radius:8px;
  pointer-events:none;
}
.paper-card h2,
.paper-card h3,
.paper-card h4{ color:var(--text-dark); }
.paper-card p{ color:#25332E; }

/* --------------------- 长文正文 --------------------- */
.prose{
  max-width:68ch;
  font-size:var(--step-16);
  line-height:1.85;
  color:#D6E0DB;
}
.prose > * + *{ margin-top:1.1em; }
.prose h2,
.prose h3{ margin-top:1.8em; margin-bottom:.6em; }
.prose ul,
.prose ol{ padding-left:1.3em; margin-bottom:1.1em; }
.prose li{ margin-bottom:.45em; }
.prose li::marker{ color:var(--cyan); }
.prose a{
  color:var(--cyan);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.prose a:hover{ color:#8FFBE7; }
.prose strong{ color:var(--paper); }
.prose blockquote{
  border-left:3px solid var(--orange);
  padding-left:1.1em;
  color:var(--text-muted);
  font-style:normal;
}

/* --------------------- 面包屑 --------------------- */
.breadcrumbs{
  font-family:var(--font-mono);
  font-size:var(--step-12);
  letter-spacing:.1em;
  color:var(--text-muted);
}
.breadcrumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumbs__item{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.breadcrumbs__item + .breadcrumbs__item::before{
  content:"/";
  color:rgba(143,166,184,.55);
}
.breadcrumbs__link{
  color:inherit;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.breadcrumbs__link:hover{
  color:var(--cyan);
  border-bottom-color:currentColor;
}
.breadcrumbs__item[aria-current="page"]{ color:var(--paper); }

/* --------------------- 图片容器基础 --------------------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  isolation:isolate;
  aspect-ratio:16 / 9;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:
    linear-gradient(158deg, rgba(18,51,43,.96), rgba(11,31,26,.99)),
    var(--ink-800);
}
.media-frame__img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center 58%;
  filter:saturate(.92) contrast(1.06) brightness(.96);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:
    linear-gradient(to right, var(--cyan), var(--cyan)) left 12px top 12px / 22px 1px no-repeat,
    linear-gradient(to bottom, var(--cyan), var(--cyan)) left 12px top 12px / 1px 22px no-repeat,
    linear-gradient(to left, var(--cyan), var(--cyan)) right 12px bottom 12px / 22px 1px no-repeat,
    linear-gradient(to top, var(--cyan), var(--cyan)) right 12px bottom 12px / 1px 22px no-repeat;
  opacity:.75;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background-image:repeating-linear-gradient(to bottom, rgba(11,31,26,.5) 0 1px, rgba(11,31,26,0) 1px 4px);
  opacity:.3;
}
.media-frame__caption{
  position:absolute;
  z-index:3;
  left:0;
  right:0;
  bottom:0;
  padding:26px 16px 14px;
  background:linear-gradient(to top, rgba(7,17,14,.9), rgba(7,17,14,0));
  color:var(--cream);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.14em;
  line-height:1.6;
}
.media-frame--wide{ aspect-ratio:21 / 9; }
.media-frame--tall{ aspect-ratio:4 / 5; }
.media-frame--square{ aspect-ratio:1 / 1; }

/* =========================================================
   跳转链接
   ========================================================= */
.skip-link{
  position:fixed;
  left:14px;
  top:-72px;
  z-index:200;
  display:inline-block;
  padding:11px 18px;
  border-radius:var(--radius-pill);
  background:var(--cyan);
  color:#08201A;
  font-weight:800;
  font-size:var(--step-14);
  letter-spacing:.06em;
  transition:top .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{ top:14px; }

/* =========================================================
   站点头部
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--ink-900);
  border-bottom:1px solid var(--line);
  color:var(--paper);
  transition:box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:rgba(57,242,208,.34);
  box-shadow:0 14px 34px -26px #000;
}

.site-header__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:15px var(--gutter);
  transition:padding var(--dur) var(--ease);
}
.site-header.is-scrolled .site-header__inner{ padding-block:9px; }

/* 品牌署名 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:inherit;
}
.brand__mark{
  position:relative;
  display:grid;
  place-items:center;
  width:42px;
  height:42px;
  flex:0 0 auto;
  border:1px solid var(--line-strong);
  border-radius:11px;
  background:linear-gradient(140deg, rgba(57,242,208,.20), rgba(57,242,208,0) 70%);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:.05em;
  line-height:1;
  transition:border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.brand__mark::after{
  content:"";
  position:absolute;
  right:-3px;
  bottom:-3px;
  width:8px;
  height:8px;
  border-radius:2px;
  background:var(--orange);
}
.brand:hover .brand__mark{
  border-color:var(--cyan);
  box-shadow:0 0 18px -6px rgba(57,242,208,.9);
}
.brand__text{
  display:flex;
  flex-direction:column;
  gap:3px;
  line-height:1.1;
}
.brand__name{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:800;
  letter-spacing:.1em;
  color:var(--paper);
}
.brand__coord{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.3em;
  color:var(--text-muted);
  text-transform:uppercase;
}

/* 移动端栏目按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 15px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(57,242,208,.42);
  background:var(--ink-800);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  cursor:pointer;
  transition:border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover{ border-color:var(--cyan); color:var(--cyan); }
.nav-toggle__bars{
  display:inline-grid;
  gap:3px;
  width:16px;
}
.nav-toggle__bars span{
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){ transform:translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars span:nth-child(2){ opacity:0; }
.site-header[data-open] .nav-toggle__bars span:nth-child(3){ transform:translateY(-5px) rotate(-45deg); }
.nav-toggle__label{ line-height:1; }

/* 主导航：悬浮胶囊 */
.site-nav{
  display:flex;
  align-items:center;
  gap:10px;
  flex:1 1 auto;
  justify-content:flex-end;
  min-width:0;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  padding:5px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(18,51,43,.9);
  min-width:0;
}
.site-nav__item{ display:flex; }
.site-nav__link{
  display:block;
  padding:8px 14px;
  border-radius:var(--radius-pill);
  font-size:13.5px;
  font-weight:600;
  letter-spacing:.03em;
  line-height:1.4;
  white-space:nowrap;
  color:#CBDCD5;
  border:1px solid transparent;
  transition:color var(--dur) var(--ease),
             background var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.site-nav__link:hover{
  color:var(--cyan);
  background:rgba(57,242,208,.10);
  border-color:rgba(57,242,208,.28);
}
.site-nav__link[aria-current="page"]{
  color:#06201A;
  background:var(--cyan);
  border-color:var(--cyan);
  box-shadow:0 0 0 1px rgba(57,242,208,.55), 0 0 20px -6px rgba(57,242,208,.85);
}

.header-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  background:var(--orange);
  border:1px solid rgba(255,107,44,.8);
  color:#0B1F1A;
  font-family:var(--font-display);
  font-size:13.5px;
  font-weight:800;
  letter-spacing:.08em;
  line-height:1.3;
  white-space:nowrap;
  transition:box-shadow var(--dur) var(--ease),
             transform var(--dur) var(--ease),
             background var(--dur) var(--ease);
}
.header-cta:hover{
  background:#FF8248;
  transform:translateY(-1px);
  box-shadow:0 10px 22px -12px rgba(255,107,44,.95);
}

/* 阅读进度条 */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:120;
  background:transparent;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg, var(--cyan), var(--orange));
  box-shadow:0 0 12px -2px rgba(57,242,208,.8);
  transition:width .1s linear;
}

/* 移动端导航面板 */
@media (max-width:1020px){
  .nav-toggle{ display:inline-flex; }

  .site-nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:14px var(--gutter) 20px;
    background:var(--ink-900);
    border-bottom:1px solid rgba(57,242,208,.3);
    box-shadow:0 26px 44px -30px #000;
  }
  .site-header[data-open] .site-nav{ display:flex; }

  .site-nav__list{
    flex-direction:row;
    align-items:center;
    justify-content:flex-start;
    gap:6px;
    overflow-x:auto;
    padding:6px;
    border-radius:var(--radius);
    scrollbar-width:thin;
    scrollbar-color:rgba(57,242,208,.45) transparent;
    -webkit-overflow-scrolling:touch;
  }
  .site-nav__list::-webkit-scrollbar{ height:4px; }
  .site-nav__list::-webkit-scrollbar-thumb{
    background:rgba(57,242,208,.45);
    border-radius:4px;
  }
  .site-nav__item{ flex:0 0 auto; }
  .site-nav__link{ padding:9px 15px; }

  .header-cta{ align-self:flex-start; margin-top:14px; }
}

@media (max-width:420px){
  .brand__mark{ width:38px; height:38px; font-size:13px; }
  .brand__name{ font-size:16px; }
  .brand__coord{ letter-spacing:.24em; font-size:10px; }
}

/* =========================================================
   站点页脚
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(32px,6vw,72px);
  background:linear-gradient(180deg, var(--ink-800), var(--ink-900) 62%);
  color:var(--text);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:4px;
  background:linear-gradient(90deg, var(--cyan) 0 28%, var(--moss) 28% 62%, var(--orange) 62% 100%);
  opacity:.9;
}

.site-footer__inner{
  display:grid;
  grid-template-columns:minmax(220px,1fr) minmax(0,2.4fr);
  gap:clamp(28px,4.4vw,56px) clamp(24px,4vw,52px);
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(42px,6vw,74px) var(--gutter) 26px;
}

/* 页脚品牌 */
.footer-brand{ min-width:0; }
.footer-brand__mark{
  display:inline-grid;
  place-items:center;
  width:46px;
  height:46px;
  border:1px solid var(--line-strong);
  border-radius:12px;
  background:linear-gradient(140deg, rgba(57,242,208,.18), rgba(57,242,208,0) 72%);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  letter-spacing:.05em;
}
.footer-brand__name{
  margin:16px 0 6px;
  font-family:var(--font-display);
  font-size:20px;
  font-weight:800;
  letter-spacing:.12em;
  color:var(--paper);
}
.footer-brand__tagline{
  margin:0;
  font-size:13px;
  letter-spacing:.14em;
  color:var(--text-muted);
  line-height:1.7;
}

/* 页脚栏目 */
.footer-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:clamp(22px,3vw,40px);
  min-width:0;
}
.footer-col{ min-width:0; }
.footer-col__title{
  margin:0 0 14px;
  padding-bottom:9px;
  border-bottom:1px solid rgba(57,242,208,.22);
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.26em;
  line-height:1.5;
  color:var(--cyan);
  text-transform:uppercase;
}
.footer-list{
  display:grid;
  gap:10px;
}
.footer-link{
  display:inline-block;
  font-size:14.5px;
  line-height:1.6;
  color:#CBDCD5;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-link:hover{
  color:var(--cyan);
  border-bottom-color:rgba(57,242,208,.6);
}

/* 页脚联系信息 */
.footer-contact{
  display:grid;
  gap:12px;
  margin-bottom:14px;
}
.footer-contact__row{
  display:grid;
  gap:3px;
  margin:0;
  min-width:0;
}
.footer-contact__key{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.24em;
  color:var(--data-blue);
  text-transform:uppercase;
}
.footer-contact__value{
  font-size:14px;
  line-height:1.7;
  color:var(--paper);
  overflow-wrap:anywhere;
}
.footer-note{
  margin:0;
  padding-left:11px;
  border-left:2px solid var(--moss);
  font-size:12.5px;
  line-height:1.8;
  color:var(--text-muted);
}

/* 页脚法务条 */
.footer-legal{
  grid-column:1 / -1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px 26px;
  padding-top:22px;
  border-top:1px solid rgba(57,242,208,.16);
}
.footer-legal__links{
  display:flex;
  flex-wrap:wrap;
  gap:18px;
}
.footer-legal__link{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--data-blue);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-legal__link:hover{
  color:var(--cyan);
  border-bottom-color:rgba(57,242,208,.6);
}
.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--data-blue);
}
.footer-icp{
  padding:3px 9px;
  border:1px solid rgba(74,85,82,.75);
  border-radius:5px;
  color:#B6C6D1;
}
.footer-copy{ color:var(--text-muted); }

@media (max-width:1020px){
  .site-footer__inner{ grid-template-columns:minmax(0,1fr); }
  .footer-grid{ grid-template-columns:repeat(2, minmax(0,1fr)); }
  .footer-col--contact{ grid-column:1 / -1; }
}
@media (max-width:640px){
  .footer-grid{ grid-template-columns:minmax(0,1fr); gap:26px; }
  .footer-col--contact{ grid-column:auto; }
  .footer-legal{ flex-direction:column; align-items:flex-start; }
}

/* =========================================================
   返回顶部
   ========================================================= */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 16px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(57,242,208,.55);
  background:rgba(11,31,26,.94);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  cursor:pointer;
  opacity:0;
  transform:translateY(10px);
  pointer-events:none;
  transition:opacity var(--dur) var(--ease),
             transform var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}
.to-top.is-visible{
  opacity:1;
  transform:translateY(0);
  pointer-events:auto;
}
.to-top:hover{
  border-color:var(--cyan);
  box-shadow:0 0 22px -8px rgba(57,242,208,.9);
}
.to-top__glyph{
  font-size:14px;
  line-height:1;
  letter-spacing:0;
}
.to-top__label{ line-height:1; }

/* =========================================================
   通用响应式收束
   ========================================================= */
@media (max-width:760px){
  html{ scroll-padding-top:88px; }
  body{ line-height:1.78; }
  .section{ padding-block:clamp(30px,7vw,56px); }
  .media-frame--wide{ aspect-ratio:16 / 9; }
}

/* =========================================================
   无障碍：减少动画
   ========================================================= */
@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;
  }
  .to-top{ transform:none; }
  .btn:hover,
  .header-cta:hover,
  .footer-link:hover,
  .site-nav__link:hover{ transform:none; }
}