/* ===========================================================
   BSPORTS 主站 · 共享样式表 /assets/site.css
   夜场球场数据舱：墨底 + 荧光青刻度 + 橙红赛事强调
   =========================================================== */

*,*::before,*::after{box-sizing:border-box}

:root{
  --ink:#04120D;
  --panel:#0A241C;
  --panel-hi:#123328;
  --cyan:#26F2C0;
  --cyan-soft:#8FFCE0;
  --flare:#FF4A1F;
  --amber:#FFB437;
  --gray:#AEBDB7;
  --paper:#F4F7F2;
  --line:#2C4A40;
  --glass:rgba(10,36,28,.60);
  --ink-text:#0B211A;
  --shell:1200px;
  --gutter:clamp(16px,4.5vw,40px);
  --radius:14px;
  --radius-lg:24px;
  --t-fast:120ms;
  --t-base:220ms;
  --shadow:0 18px 40px -28px rgba(0,0,0,.9);
  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow Condensed","Roboto Condensed","Oswald","Arial Narrow","Noto Sans SC",sans-serif;
}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100%;
  background-color:var(--ink);
  background-image:
    radial-gradient(1240px 620px at 86% -12%, rgba(38,242,192,.10), transparent 62%),
    radial-gradient(940px 540px at 2% 14%, rgba(255,74,31,.07), transparent 66%),
    repeating-linear-gradient(90deg, rgba(44,74,64,.16) 0 1px, transparent 1px 96px);
  background-repeat:no-repeat,no-repeat,repeat;
  color:var(--gray);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
}

img,picture,svg,video{display:block;max-width:100%}
img{height:auto;border-style:none}

h1,h2,h3,h4{
  margin:0 0 .6em;
  font-family:var(--font-head);
  font-weight:900;
  color:var(--paper);
  line-height:1.14;
  letter-spacing:-.02em;
}
h1{font-size:clamp(2.4rem,5vw,4.6rem)}
h2{font-size:clamp(1.7rem,3vw,2.6rem)}
h3{font-size:clamp(1.2rem,1.8vw,1.5rem)}
h4{font-size:1.05rem;letter-spacing:0}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

a{color:var(--cyan);text-decoration:none;transition:color var(--t-fast) linear}
a:hover{color:var(--cyan-soft)}

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

strong{color:var(--paper);font-weight:700}

::selection{background:var(--cyan);color:var(--ink)}

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

/* ---------- 布局外壳 ---------- */
.shell{
  width:min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline:auto;
}

.rule{
  height:1px;
  border:0;
  margin:clamp(28px,5vw,56px) 0;
  background:linear-gradient(90deg,var(--line),rgba(38,242,192,.45) 40%,rgba(44,74,64,0));
}

.skip-link{
  position:fixed;
  left:var(--gutter);
  top:-120px;
  z-index:200;
  padding:10px 18px;
  background:var(--cyan);
  color:var(--ink);
  font-weight:700;
  border-radius:0 0 8px 8px;
  transition:top var(--t-base) ease-out;
}
.skip-link:focus{top:0;color:var(--ink)}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:linear-gradient(180deg,rgba(4,18,13,.97) 0%,rgba(4,18,13,.88) 100%);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
}

.scroll-progress{
  display:block;
  position:absolute;
  left:0;
  top:0;
  height:2px;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--amber) 70%,var(--flare));
  pointer-events:none;
}

.header-top{
  overflow:hidden;
  max-height:150px;
  opacity:1;
  transition:max-height 300ms ease, opacity var(--t-base) ease;
}
.site-header[data-scrolled] .header-top{
  max-height:0;
  opacity:0;
}

.header-top__inner{
  display:grid;
  grid-template-columns:minmax(200px,auto) minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(14px,3vw,44px);
  padding:16px 0 14px;
}

.brand{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{
  font-family:var(--font-head);
  font-weight:900;
  font-size:clamp(1.25rem,2.4vw,1.75rem);
  letter-spacing:-.02em;
  color:var(--paper);
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  line-height:1.1;
}
.brand__name:hover{color:var(--cyan-soft)}
.brand__suffix{
  font-size:.62em;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--cyan);
  border:1px solid var(--line);
  border-radius:4px;
  padding:2px 6px;
}
.brand__version{
  margin:0;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--amber);
}

.header-tagline{
  margin:0;
  font-size:13px;
  letter-spacing:.22em;
  color:var(--gray);
  text-align:center;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  justify-content:flex-end;
}
.header-note{
  margin:0;
  max-width:230px;
  font-size:11px;
  line-height:1.5;
  letter-spacing:.08em;
  color:var(--gray);
  opacity:.78;
  text-align:right;
}

.header-bar{position:relative}
.header-bar__inner{
  display:flex;
  align-items:center;
  gap:16px;
  min-height:62px;
}

.brand-mini{
  display:none;
  align-items:baseline;
  gap:6px;
  font-family:var(--font-head);
  font-weight:900;
  font-size:1rem;
  letter-spacing:-.01em;
  color:var(--paper);
  white-space:nowrap;
}
.brand-mini span{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--cyan);
}
.site-header[data-scrolled] .brand-mini{display:inline-flex}

.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2px;
}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:.94rem;
  font-weight:700;
  letter-spacing:.06em;
  color:var(--gray);
  white-space:nowrap;
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:4px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform var(--t-fast) linear;
}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:var(--paper)}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--cyan)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--cyan)}

.round-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:8px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(18,51,40,.55);
  color:var(--paper);
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.1em;
  white-space:nowrap;
  transition:border-color var(--t-base) ease, background var(--t-base) ease, color var(--t-base) ease;
}
.round-chip:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  background:rgba(38,242,192,.10);
}
.round-chip__dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--flare);
  box-shadow:0 0 0 4px rgba(255,74,31,.18);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 4px rgba(255,74,31,.18)}
  50%{box-shadow:0 0 0 8px rgba(255,74,31,.06)}
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:.85rem;
  font-weight:700;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color var(--t-base) ease, color var(--t-base) ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars i{
  display:block;
  height:2px;
  width:100%;
  background:currentColor;
  transition:transform var(--t-base) ease, opacity var(--t-fast) linear;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-body);
  font-size:.92rem;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.2;
  cursor:pointer;
  white-space:nowrap;
  transition:background var(--t-base) ease, border-color var(--t-base) ease,
             color var(--t-base) ease, transform var(--t-fast) linear;
}
.btn:active{transform:translateY(1px)}
.btn--solid{background:var(--flare);color:#1B0600}
.btn--solid:hover{background:#FF6A45;color:#1B0600}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--cyan{background:var(--cyan);color:#03231A}
.btn--cyan:hover{background:var(--cyan-soft);color:#03231A}

/* ---------- 标签与状态 ---------- */
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(18,51,40,.5);
  color:var(--gray);
  font-size:12px;
  letter-spacing:.1em;
}
.tag{
  display:inline-block;
  padding:3px 9px;
  border:1px solid var(--line);
  border-radius:4px;
  font-family:var(--font-num);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--gray);
  background:rgba(4,18,13,.5);
}
.tag--live{background:var(--flare);border-color:var(--flare);color:#1B0600}
.tag--soon{background:rgba(255,180,55,.14);border-color:var(--amber);color:var(--amber)}
.tag--done{border-color:var(--line);color:var(--gray)}

.kicker,
.eyebrow{
  display:block;
  margin:0 0 10px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.22em;
  color:var(--cyan);
}

.link-underline{position:relative;display:inline-block}
.link-underline::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-3px;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform var(--t-fast) linear;
}
.link-underline:hover::after,
.link-underline:focus-visible::after{transform:scaleX(1)}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,8vw,110px);
  background:linear-gradient(180deg,var(--panel) 0%,#061A12 100%);
  border-top:1px solid var(--line);
  padding:clamp(36px,6vw,64px) 0 22px;
}

.footer-main{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.5fr);
  gap:clamp(26px,5vw,64px);
}

.footer-brand__name{
  margin:0 0 4px;
  font-family:var(--font-head);
  font-weight:900;
  font-size:1.4rem;
  letter-spacing:-.02em;
  color:var(--paper);
}
.footer-brand__version{
  margin:0 0 6px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--amber);
}
.footer-brand__tagline{
  margin:0 0 20px;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--gray);
}

.footer-contact{
  display:grid;
  gap:10px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.footer-contact__item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:12px;
  font-size:.86rem;
}
.footer-contact__key{
  font-size:11px;
  letter-spacing:.16em;
  color:var(--cyan);
  white-space:nowrap;
}
.footer-contact__val{
  min-width:0;
  color:var(--paper);
  word-break:break-all;
}
.footer-contact__note{
  margin:14px 0 0;
  font-size:12px;
  line-height:1.7;
  color:var(--gray);
  opacity:.85;
}

.copy-btn{
  padding:4px 10px;
  border:1px solid var(--line);
  border-radius:6px;
  background:rgba(4,18,13,.6);
  color:var(--gray);
  font-family:var(--font-body);
  font-size:11px;
  letter-spacing:.1em;
  cursor:pointer;
  transition:border-color var(--t-base) ease, color var(--t-base) ease, background var(--t-base) ease;
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.copy-btn[data-copied="true"]{border-color:var(--cyan);color:var(--ink);background:var(--cyan)}
.copy-btn[data-copied="false"]{border-color:var(--amber);color:var(--amber)}

.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,36px);
}
.footer-col__title{
  margin:0 0 14px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--cyan);
}
.footer-col__list{display:grid;gap:10px}
.footer-link{
  position:relative;
  display:inline-block;
  font-size:.9rem;
  color:var(--gray);
  transition:color var(--t-fast) linear;
}
.footer-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform var(--t-fast) linear;
}
.footer-link:hover{color:var(--paper)}
.footer-link:hover::after{transform:scaleX(1)}

.footer-legal{
  margin-top:clamp(28px,4vw,48px);
  padding-top:18px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.footer-legal__line{
  margin:0;
  font-size:12px;
  color:var(--gray);
  opacity:.85;
}
.footer-legal__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  font-size:12px;
  color:var(--gray);
}
.footer-icp{color:var(--paper);letter-spacing:.06em}
.footer-copy{color:var(--gray)}

.to-top{
  padding:6px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  color:var(--gray);
  font-family:var(--font-body);
  font-size:11px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color var(--t-base) ease, color var(--t-base) ease;
}
.to-top:hover{border-color:var(--cyan);color:var(--cyan)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  margin:0 0 18px;
  font-size:12px;
  letter-spacing:.12em;
}
.breadcrumb__item{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--gray);
}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:var(--line);
}
.breadcrumb__item[aria-current="page"]{color:var(--paper)}

/* ---------- 页面导语与章节头 ---------- */
.page-intro{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(16px,4vw,44px);
  padding:clamp(32px,6vw,72px) 0 clamp(24px,4vw,48px);
}
.page-intro__body{max-width:62ch}

.vertical-note{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:12px;
  letter-spacing:.3em;
  color:var(--gray);
  opacity:.75;
  min-height:120px;
}

.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:clamp(14px,3vw,36px);
  align-items:start;
  margin-bottom:clamp(20px,3vw,36px);
}
.section-head__index{
  font-family:var(--font-num);
  font-size:clamp(2.4rem,6vw,4.2rem);
  font-weight:700;
  line-height:.85;
  letter-spacing:-.03em;
  color:transparent;
  -webkit-text-stroke:1px var(--cyan);
  text-stroke:1px var(--cyan);
}
.section-head__body{max-width:64ch}
.section-head__body p{margin-bottom:.4em}

/* ---------- 内容层 ---------- */
.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(20px,3vw,34px);
  backdrop-filter:blur(10px);
  box-shadow:var(--shadow);
}

.solid-card{
  background:var(--paper);
  color:var(--ink-text);
  border-radius:var(--radius);
  padding:clamp(18px,2.4vw,28px);
}
.solid-card h1,.solid-card h2,.solid-card h3,.solid-card h4{color:var(--ink)}
.solid-card a{color:#0E6B52}
.solid-card a:hover{color:#0A4A39}
.solid-card strong{color:var(--ink)}

.data-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-left:3px solid var(--cyan);
  border-radius:6px 12px 12px 6px;
  padding:clamp(16px,2vw,24px);
  transition:border-color var(--t-base) ease, background var(--t-base) ease, transform var(--t-fast) ease;
}
.data-card:hover{
  border-color:var(--cyan);
  border-left-color:var(--cyan-soft);
  background:#0D2C22;
  transform:translateY(-2px);
}

.data-list{
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
}
.data-list__row{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,.7fr)) auto;
  align-items:center;
  gap:12px;
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  font-size:.9rem;
  transition:background var(--t-base) ease;
}
.data-list__row:last-child{border-bottom:0}
.data-list__row:nth-child(odd){background:rgba(244,247,242,.045)}
.data-list__row:hover{background:rgba(38,242,192,.09)}
.data-list__key{color:var(--paper);font-weight:700}
.data-list__val{
  font-family:var(--font-num);
  font-size:1.15rem;
  letter-spacing:-.01em;
  color:var(--cyan);
}
.solid-card .data-list,
.data-list--paper{background:var(--paper);border-color:#CBD8D2}
.data-list--paper .data-list__row{border-bottom-color:#DCE5E0;color:var(--ink-text)}
.data-list--paper .data-list__row:nth-child(odd){background:rgba(10,36,28,.045)}
.data-list--paper .data-list__key{color:var(--ink)}
.data-list--paper .data-list__val{color:#0E6B52}

.stat{display:grid;gap:4px}
.stat__num{
  font-family:var(--font-num);
  font-size:clamp(2.6rem,5vw,4rem);
  font-weight:700;
  line-height:.9;
  letter-spacing:-.03em;
  color:var(--paper);
}
.stat__num--cyan{color:var(--cyan)}
.stat__label{
  font-size:12px;
  letter-spacing:.18em;
  color:var(--gray);
}

.lede{
  font-size:clamp(1.02rem,1.3vw,1.2rem);
  line-height:1.8;
  color:#C9D6D0;
  max-width:62ch;
}
.note{
  font-size:13px;
  line-height:1.75;
  color:var(--gray);
  opacity:.85;
}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.split{
  display:grid;
  grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);
  gap:clamp(20px,3.4vw,48px);
  align-items:start;
}
.sticky-col{position:sticky;top:110px}

/* ---------- 筛选与折叠 ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
}
.filter-btn{
  padding:7px 16px;
  border:1px solid var(--line);
  border-radius:999px;
  background:transparent;
  color:var(--gray);
  font-family:var(--font-body);
  font-size:.82rem;
  letter-spacing:.1em;
  cursor:pointer;
  transition:border-color var(--t-base) ease, color var(--t-base) ease, background var(--t-base) ease;
}
.filter-btn:hover{border-color:var(--cyan);color:var(--paper)}
.filter-btn[aria-pressed="true"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
  font-weight:700;
}

.accordion{border-top:1px solid var(--line)}
.accordion__item{border-bottom:1px solid var(--line)}
.accordion__trigger{
  display:flex;
  width:100%;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 4px;
  background:transparent;
  border:0;
  color:var(--paper);
  font-family:var(--font-head);
  font-size:1.02rem;
  font-weight:700;
  text-align:left;
  cursor:pointer;
  transition:color var(--t-fast) linear;
}
.accordion__trigger::after{
  content:"+";
  font-family:var(--font-num);
  font-size:1.4rem;
  color:var(--cyan);
  transition:transform var(--t-base) ease;
}
.accordion__trigger:hover{color:var(--cyan)}
.accordion__trigger[aria-expanded="true"]::after{content:"–"}
.accordion__panel{
  display:none;
  padding:0 4px 22px;
  max-width:70ch;
}
.accordion__panel[data-open]{display:block;animation:fadeIn var(--t-base) ease-out}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* ---------- 图片容器 ---------- */
.media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(140deg,var(--panel-hi),var(--ink) 70%);
  aspect-ratio:16 / 9;
}
.media--wide{aspect-ratio:21 / 9}
.media--tall{aspect-ratio:3 / 4}
.media--square{aspect-ratio:1 / 1}
.media > img,
.media > picture,
.media > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(4,18,13,0) 45%,rgba(4,18,13,.55) 100%);
  pointer-events:none;
}
.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  margin:0;
  padding:12px 14px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--paper);
}

/* ---------- 章节圆点导航 ---------- */
.section-dots{
  position:fixed;
  right:20px;
  top:50%;
  transform:translateY(-50%);
  z-index:60;
  display:grid;
  gap:12px;
}
.section-dots__link{
  display:block;
  width:10px;
  height:10px;
  border:1px solid var(--line);
  border-radius:50%;
  background:transparent;
  transition:background var(--t-base) ease, border-color var(--t-base) ease, box-shadow var(--t-base) ease;
}
.section-dots__link:hover{border-color:var(--cyan)}
.section-dots__link[aria-current="true"]{
  background:var(--cyan);
  border-color:var(--cyan);
  box-shadow:0 0 0 4px rgba(38,242,192,.16);
}

/* ---------- 显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity 420ms ease-out, transform 420ms ease-out;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .header-top__inner{grid-template-columns:auto minmax(0,1fr) auto;gap:16px}
  .header-note{display:none}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:minmax(0,1fr)}
  .sticky-col{position:static}
  .footer-main{grid-template-columns:minmax(0,1fr)}
  .section-dots{display:none}
}

@media (max-width:900px){
  body{font-size:16px}
  .header-top__inner{
    grid-template-columns:minmax(0,1fr) auto;
    gap:10px;
    padding:14px 0 12px;
  }
  .header-tagline{display:none}
  .header-note{display:none}
  .header-actions{gap:8px}
  .header-actions .btn{padding:9px 14px;font-size:.82rem}
  .brand-mini{display:inline-flex}
  .header-bar__inner{min-height:56px;gap:12px}
  .nav-toggle{display:inline-flex}
  .round-chip{padding:7px 12px;font-size:.76rem}
  .site-nav{
    position:absolute;
    left:calc(var(--gutter) * -1);
    right:calc(var(--gutter) * -1);
    top:100%;
    display:none;
    padding:6px var(--gutter) 18px;
    background:var(--panel);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  .site-nav[data-open]{display:block;animation:fadeIn var(--t-base) ease-out}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__link{display:block;padding:15px 2px;border-bottom:1px solid var(--line)}
  .site-nav__link::after{left:2px;right:auto;bottom:10px;width:26px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .page-intro{grid-template-columns:minmax(0,1fr)}
  .section-head{grid-template-columns:minmax(0,1fr)}
  .section-head__index{font-size:2.4rem}
  .data-list__row{grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);row-gap:6px}
}

@media (max-width:560px){
  .header-actions .btn--ghost{display:none}
  .footer-cols{grid-template-columns:minmax(0,1fr)}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .footer-contact__item{grid-template-columns:minmax(0,1fr) auto;row-gap:4px}
}

@media (min-width:1440px){
  :root{--shell:1280px}
}

/* ---------- 无障碍与减弱动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:1ms !important;
    animation-iteration-count:1 !important;
    transition-duration:1ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .round-chip__dot{animation:none}
}