/* =========================================================
   财神棋牌 · 乐动体育平台 — 共享样式表 /assets/site.css
   层级：变量 → 重置 → 排版 → 布局 → 组件 → 图片容器
        → 头部 → 页脚 → 动效 → 响应式
   ========================================================= */

/* ---------- 01 变量 ---------- */
:root{
  --c-red:#C8102E;
  --c-gold:#E8B24A;
  --c-crimson:#7C0D22;
  --c-night:#0B1220;
  --c-board:#12161C;
  --c-green:#1F8A4C;
  --c-cyan:#22D3EE;
  --c-orange:#FF8A3D;
  --c-paper:#F5EFE6;
  --c-slate:#8A93A3;

  --c-line:rgba(138,147,163,.22);
  --c-line-soft:rgba(138,147,163,.12);
  --c-line-gold:rgba(232,178,74,.32);
  --c-surface:rgba(18,22,28,.86);
  --c-surface-2:rgba(11,18,32,.92);

  --font-display:"Source Han Sans SC Heavy","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-data:"JetBrains Mono",SFMono-Regular,Consolas,"Liberation Mono",monospace;

  --shell:1240px;
  --radius-lg:26px;
  --radius-md:18px;
  --radius-sm:12px;
  --pill:999px;
  --header-h:72px;

  --ease:cubic-bezier(.22,.72,.28,1);
  --shadow-card:0 18px 42px rgba(0,0,0,.44);
  --shadow-red:0 10px 26px rgba(200,16,46,.34);
}

/* ---------- 02 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--c-night);
  background-image:
    radial-gradient(1100px 560px at 6% -10%, rgba(200,16,46,.26), transparent 64%),
    radial-gradient(840px 460px at 98% 0%, rgba(232,178,74,.11), transparent 62%),
    radial-gradient(760px 420px at 50% 108%, rgba(31,138,76,.10), transparent 66%);
  background-repeat:no-repeat;
  color:var(--c-paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--c-cyan);outline-offset:3px;border-radius:6px}
::selection{background:rgba(232,178,74,.36);color:#fff}

/* ---------- 03 排版 ---------- */
h1,h2,h3,h4{
  margin:0 0 .6em;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.01em;
  color:var(--c-paper);
}
h1{font-size:clamp(2rem,4.6vw,3.4rem)}
h2{font-size:clamp(1.6rem,3.4vw,2.6rem)}
h3{font-size:1.125rem;line-height:1.35}
p{margin:0 0 1em}
a{color:var(--c-cyan);text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--c-gold)}
ul,ol{margin:0 0 1em;padding-left:1.2em}
strong{font-weight:700;color:var(--c-paper)}
small{font-size:.8rem}
.display-xl{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.8rem,9vw,7rem);
  line-height:.98;
  letter-spacing:-.03em;
  margin:0 0 .3em;
}
.section-title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.6rem,3.4vw,2.6rem);
  line-height:1.15;
  letter-spacing:-.015em;
  margin:0 0 .5em;
}
.lede{
  max-width:62ch;
  font-size:clamp(1rem,1.25vw,1.14rem);
  color:rgba(245,239,230,.78);
  margin:0 0 1.2em;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
  font-family:var(--font-data);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--c-gold);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:currentColor;
  opacity:.75;
}
.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}
.rule{
  height:1px;
  border:0;
  margin:clamp(24px,4vw,46px) 0;
  background:linear-gradient(90deg,var(--c-line-gold),rgba(138,147,163,.06));
}

/* ---------- 04 布局 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,40px);
}
.section{position:relative;padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(30px,4vw,56px)}
.section--bleed{padding-block:clamp(64px,9vw,132px)}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}
.grid--5-7{grid-template-columns:5fr 7fr}
.stack{display:flex;flex-direction:column;gap:clamp(12px,1.8vw,20px)}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}

/* ---------- 05 组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:var(--font-body);
  font-size:.9rem;
  font-weight:600;
  line-height:1;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s ease-out,background-color .18s ease-out,color .18s ease-out;
}
.btn-primary{
  background:linear-gradient(135deg,var(--c-red),var(--c-crimson));
  color:var(--c-paper);
  box-shadow:var(--shadow-red),inset 0 0 0 1px rgba(232,178,74,.45);
}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(200,16,46,.44),inset 0 0 0 1px rgba(232,178,74,.6)}
.btn-gold{
  background:linear-gradient(135deg,var(--c-gold),#c9902f);
  color:#241703;
  box-shadow:0 10px 24px rgba(232,178,74,.28);
}
.btn-gold:hover{color:#241703;transform:translateY(-2px)}
.btn-ghost{
  background:rgba(18,22,28,.6);
  border-color:var(--c-line-gold);
  color:var(--c-gold);
}
.btn-ghost:hover{background:rgba(232,178,74,.14);color:var(--c-gold)}
.btn-block{width:100%}

.chip-bar{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 16px;
  border:1px solid var(--c-line);
  border-radius:var(--pill);
  background:rgba(18,22,28,.62);
  color:rgba(245,239,230,.82);
  font-size:.8rem;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:border-color .18s ease-out,background-color .18s ease-out,color .18s ease-out;
}
.chip:hover{border-color:var(--c-line-gold);color:var(--c-gold)}
.chip[aria-pressed="true"],
.chip.is-active{
  border-color:var(--c-gold);
  background:rgba(232,178,74,.18);
  color:var(--c-gold);
}
.chip-index{font-family:var(--font-data);font-size:.66rem;letter-spacing:.1em;opacity:.72}

.panel{
  position:relative;
  padding:clamp(20px,3vw,34px);
  border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(18,22,28,.96),rgba(11,18,32,.9));
  box-shadow:inset 0 0 0 1px var(--c-line-soft),var(--shadow-card);
}
.panel--gold{box-shadow:inset 0 0 0 1px var(--c-line-gold),var(--shadow-card)}
.panel--green{box-shadow:inset 0 0 0 1px rgba(31,138,76,.42),var(--shadow-card)}
.panel-title{
  font-family:var(--font-display);
  font-size:1.125rem;
  font-weight:800;
  margin:0 0 .5em;
}

.stat{display:flex;flex-direction:column;gap:6px}
.stat-value{
  font-family:var(--font-data);
  font-weight:500;
  font-size:clamp(2rem,5vw,3.4rem);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--c-paper);
  font-variant-numeric:tabular-nums;
}
.stat-value--gold{color:var(--c-gold)}
.stat-value--cyan{color:var(--c-cyan)}
.stat-value--orange{color:var(--c-orange)}
.stat-label{
  font-family:var(--font-data);
  font-size:.68rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-slate);
}
.stat-note{font-size:.84rem;color:rgba(245,239,230,.66);margin:0}

.status-dot{
  display:inline-block;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--c-green);
  box-shadow:0 0 0 3px rgba(31,138,76,.2);
}
.status-dot--live{background:var(--c-red);box-shadow:0 0 0 3px rgba(200,16,46,.22)}
.status-dot--gold{background:var(--c-gold);box-shadow:0 0 0 3px rgba(232,178,74,.22)}
.status-dot--cyan{background:var(--c-cyan);box-shadow:0 0 0 3px rgba(34,211,238,.2)}

.data-table{width:100%;font-size:.92rem}
.data-table caption{
  padding-bottom:12px;
  font-family:var(--font-data);
  font-size:.68rem;
  letter-spacing:.18em;
  color:var(--c-slate);
  text-align:left;
}
.data-table th{
  padding:10px 12px;
  font-family:var(--font-data);
  font-size:.68rem;
  font-weight:500;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-slate);
  text-align:left;
  border-bottom:1px solid var(--c-line);
}
.data-table td{
  padding:12px;
  border-bottom:1px solid var(--c-line-soft);
  font-variant-numeric:tabular-nums;
}
.data-table tbody tr{transition:background-color .16s ease-out}
.data-table tbody tr:hover{background:rgba(232,178,74,.06)}
.data-table .num{
  font-family:var(--font-data);
  text-align:right;
  letter-spacing:.02em;
}
.data-table .team-home{color:var(--c-cyan)}
.data-table .team-away{color:var(--c-orange)}

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:0;
  padding:20px 0 0;
  list-style:none;
  font-family:var(--font-data);
  font-size:.7rem;
  letter-spacing:.12em;
  color:var(--c-slate);
}
.breadcrumbs a{color:rgba(245,239,230,.72)}
.breadcrumbs a:hover{color:var(--c-gold)}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:rgba(138,147,163,.5)}

.prose{
  max-width:72ch;
  font-size:1.02rem;
  color:rgba(245,239,230,.86);
}
.prose p{margin:0 0 1.15em}
.prose h2{margin-top:1.6em;font-size:clamp(1.4rem,2.4vw,1.9rem)}
.prose h3{margin-top:1.4em;color:var(--c-gold)}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin-bottom:.5em}
.prose a{color:var(--c-cyan);border-bottom:1px solid rgba(34,211,238,.4)}
.prose a:hover{color:var(--c-gold);border-bottom-color:rgba(232,178,74,.6)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--pill);
  border:1px solid var(--c-line);
  font-family:var(--font-data);
  font-size:.66rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-slate);
}
.tag--gold{border-color:var(--c-line-gold);color:var(--c-gold)}
.tag--green{border-color:rgba(31,138,76,.5);color:#5fd08c}
.tag--cyan{border-color:rgba(34,211,238,.45);color:var(--c-cyan)}
.tag--orange{border-color:rgba(255,138,61,.45);color:var(--c-orange)}

/* ---------- 06 图片容器基础规则 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border-radius:var(--radius-lg);
  background:linear-gradient(140deg,#171d27,#0c121c 70%);
  box-shadow:inset 0 0 0 1px var(--c-line-gold);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,18,32,0) 46%,rgba(11,18,32,.62));
  pointer-events:none;
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}
.media--wide{aspect-ratio:21 / 9}
.media--portrait{aspect-ratio:3 / 4}
.media--square{aspect-ratio:1 / 1}
.media--slice{border-radius:24px;clip-path:polygon(0 0,100% 0,100% 88%,0 100%)}
.media-caption{
  margin-top:10px;
  font-family:var(--font-data);
  font-size:.74rem;
  letter-spacing:.04em;
  color:var(--c-slate);
}
.media-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:clamp(14px,2vw,24px);
}

/* ---------- 07 头部命令栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(11,18,32,.97),rgba(11,18,32,.9));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(232,178,74,.55),rgba(200,16,46,.5),transparent);
  pointer-events:none;
}
.skip-link{
  position:absolute;
  left:clamp(18px,4vw,40px);
  top:8px;
  z-index:90;
  padding:10px 18px;
  border-radius:var(--radius-sm);
  background:var(--c-gold);
  color:#241703;
  font-size:.86rem;
  font-weight:700;
  text-decoration:none;
  transform:translateY(-160%);
  opacity:0;
  transition:transform .18s var(--ease),opacity .18s ease-out;
}
.skip-link:focus{transform:translateY(0);opacity:1;color:#241703}

.header-inner{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,24px);
  min-height:var(--header-h);
  padding-block:10px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:inherit;
  text-decoration:none;
}
.brand-seal{
  display:grid;
  place-items:center;
  width:42px;height:42px;
  border-radius:14px;
  font-family:var(--font-display);
  font-size:1.35rem;
  font-weight:900;
  color:var(--c-gold);
  background:linear-gradient(150deg,var(--c-red),var(--c-crimson));
  box-shadow:inset 0 0 0 1px rgba(232,178,74,.6),0 8px 18px rgba(200,16,46,.32);
  transform:rotate(-4deg);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-line{
  font-family:var(--font-display);
  font-size:1rem;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--c-paper);
}
.brand-tagline{
  font-family:var(--font-data);
  font-size:.64rem;
  letter-spacing:.16em;
  color:var(--c-slate);
}

.nav{margin-inline-start:auto}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:4px;
  list-style:none;
  border-radius:var(--pill);
  background:rgba(18,22,28,.72);
  box-shadow:inset 0 0 0 1px var(--c-line-soft);
}
.nav-item{list-style:none}
.nav-link{
  display:inline-flex;
  align-items:baseline;
  gap:7px;
  padding:8px 14px;
  border-radius:var(--pill);
  color:rgba(245,239,230,.78);
  font-size:.88rem;
  font-weight:500;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-link:hover{color:var(--c-gold);background:rgba(232,178,74,.1)}
.nav-index{
  font-family:var(--font-data);
  font-size:.6rem;
  letter-spacing:.14em;
  color:var(--c-slate);
}
.nav-link[aria-current="page"]{
  background:linear-gradient(140deg,rgba(232,178,74,.96),rgba(232,178,74,.74));
  color:#241703;
  font-weight:700;
}
.nav-link[aria-current="page"] .nav-index{color:rgba(36,23,3,.68)}
.nav-link[aria-current="page"]:hover{color:#241703}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.btn-cta{padding:11px 20px;font-size:.86rem}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:10px 15px;
  border-radius:var(--pill);
  border:1px solid var(--c-line-gold);
  background:rgba(18,22,28,.85);
  color:var(--c-gold);
  font-family:var(--font-data);
  font-size:.68rem;
  letter-spacing:.16em;
  cursor:pointer;
}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;height:10px;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(4px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-4px) rotate(-45deg)}

.progress-rail{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:rgba(138,147,163,.16);
  pointer-events:none;
}
.progress-bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--c-red),var(--c-gold));
  transition:width .12s linear;
}

/* ---------- 08 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,96px);
  overflow:hidden;
  border-top:1px solid var(--c-line-gold);
  background:linear-gradient(180deg,rgba(18,22,28,.72),rgba(11,18,32,1) 62%);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(620px 220px at 6% 0%, rgba(200,16,46,.24), transparent 70%),
    radial-gradient(520px 200px at 94% 100%, rgba(34,211,238,.1), transparent 72%);
}
.footer-inner{
  position:relative;
  display:grid;
  grid-template-columns:minmax(230px,1.25fr) minmax(140px,.68fr) minmax(150px,.68fr) minmax(230px,1.1fr);
  gap:clamp(24px,4vw,52px);
  padding-block:clamp(40px,6vw,74px);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start}
.footer-seal{
  display:grid;
  place-items:center;
  width:46px;height:46px;
  margin-bottom:16px;
  border-radius:14px;
  font-family:var(--font-display);
  font-size:1.4rem;
  font-weight:900;
  color:var(--c-gold);
  background:linear-gradient(150deg,var(--c-red),var(--c-crimson));
  box-shadow:inset 0 0 0 1px rgba(232,178,74,.55);
  transform:rotate(-4deg);
}
.footer-brand-name{
  margin:0 0 6px;
  font-family:var(--font-display);
  font-size:1.05rem;
  font-weight:800;
  color:var(--c-paper);
}
.footer-tagline{
  margin:0 0 12px;
  font-family:var(--font-data);
  font-size:.7rem;
  letter-spacing:.16em;
  color:var(--c-gold);
}
.footer-note{
  margin:0;
  max-width:30ch;
  font-size:.86rem;
  color:rgba(245,239,230,.6);
}
.footer-col{min-width:0}
.footer-title{
  margin:0 0 16px;
  font-family:var(--font-data);
  font-size:.68rem;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--c-slate);
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:.92rem;
  color:rgba(245,239,230,.74);
  text-decoration:none;
  transition:color .18s ease-out,transform .18s ease-out;
}
.footer-link::before{
  content:"";
  flex:0 0 auto;
  width:5px;height:5px;
  border-radius:50%;
  background:var(--c-gold);
  opacity:.55;
  transition:opacity .18s ease-out;
}
.footer-link:hover{color:var(--c-gold);transform:translateX(2px)}
.footer-link:hover::before{opacity:1}
.footer-contact-list{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-contact-item{display:flex;flex-direction:column;gap:2px}
.footer-contact-key{
  font-family:var(--font-data);
  font-size:.62rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--c-slate);
}
.footer-contact-value{
  font-size:.88rem;
  line-height:1.6;
  color:rgba(245,239,230,.82);
  word-break:break-word;
}
.footer-bottom{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px 24px;
  padding-block:20px 26px;
  border-top:1px solid var(--c-line-soft);
}
.footer-copy{margin:0;font-size:.8rem;color:var(--c-slate)}
.footer-legal-list{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer-legal-link{
  font-family:var(--font-data);
  font-size:.72rem;
  letter-spacing:.1em;
  color:rgba(245,239,230,.66);
  text-decoration:none;
}
.footer-legal-link:hover{color:var(--c-gold)}
.footer-icp{
  margin:0;
  font-family:var(--font-data);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--c-slate);
}

.back-to-top{
  position:fixed;
  right:clamp(14px,3vw,30px);
  bottom:clamp(14px,3vw,30px);
  z-index:70;
  display:grid;
  place-items:center;
  gap:0;
  width:52px;height:52px;
  border-radius:50%;
  border:1px solid var(--c-line-gold);
  background:rgba(18,22,28,.94);
  color:var(--c-gold);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .2s ease-out,transform .2s var(--ease),visibility .2s linear,background-color .18s ease-out;
}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:rgba(200,16,46,.32)}
.back-to-top-icon{font-size:1rem;line-height:1}
.back-to-top-text{font-family:var(--font-data);font-size:.56rem;letter-spacing:.14em;opacity:.75}

/* ---------- 09 章节状态与动效 ---------- */
[data-section]{scroll-margin-top:calc(var(--header-h) + 20px)}
[data-section-link]{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 13px;
  border-left:2px solid transparent;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  font-family:var(--font-data);
  font-size:.72rem;
  letter-spacing:.12em;
  color:rgba(138,147,163,.9);
  text-decoration:none;
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
[data-section-link]:hover{color:var(--c-paper);background:rgba(232,178,74,.08)}
[data-section-link].is-current{
  color:var(--c-gold);
  border-left-color:var(--c-red);
  background:rgba(200,16,46,.14);
}

.js [data-reveal]{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .5s ease-out,transform .5s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 10 响应式 ---------- */
@media (max-width:1180px){
  .grid--5-7{grid-template-columns:1fr}
}
@media (max-width:1080px){
  :root{--header-h:64px}
  .header-actions{margin-inline-start:auto}
  .nav-toggle{display:inline-flex}
  .nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:block;
    margin:0;
    padding:12px clamp(18px,4vw,40px) 22px;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    background:linear-gradient(180deg,rgba(11,18,32,.99),rgba(18,22,28,.98));
    border-bottom:1px solid var(--c-line-gold);
    box-shadow:0 26px 48px rgba(0,0,0,.5);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s linear;
  }
  .nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:0;
    background:none;
    box-shadow:none;
  }
  .nav-link{
    justify-content:flex-start;
    padding:15px 16px;
    border-radius:var(--radius-md);
    background:rgba(18,22,28,.66);
    box-shadow:inset 0 0 0 1px var(--c-line-soft);
    font-size:.98rem;
  }
  .nav-link[aria-current="page"]{
    box-shadow:inset 0 0 0 1px rgba(232,178,74,.6);
  }
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:820px){
  .brand-tagline{display:none}
  .footer-inner{gap:28px}
}
@media (max-width:640px){
  .display-xl{font-size:clamp(2.4rem,12vw,3.4rem)}
  .footer-inner{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px}
  .btn-cta{padding:10px 15px;font-size:.8rem}
  .back-to-top{width:46px;height:46px;right:14px;bottom:14px}
}
@media (max-width:400px){
  .btn-cta{display:none}
  .brand-seal{width:38px;height:38px;font-size:1.15rem}
}

@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;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .progress-bar{transition:none}
}