/* ============================================================
   乐宝体育 /assets/site.css
   顺序：变量 → 重置 → 排版 → 工具类 → 通用组件 → 页头 → 页脚 → 响应式
   ============================================================ */

:root{
  /* 赛场色板 */
  --orange:#F24E1E;
  --ink:#0A1A2F;
  --cyan:#16D9E3;
  --lime:#C9FF3D;
  --wine:#7B1E2B;
  --teal:#0B3B3F;
  --sand:#F7F2E8;
  --graphite:#14181D;
  --slate:#91A6B2;
  --white:#FFFFFF;
  --amber:#FFB000;

  /* 分隔线 */
  --line-strong:rgba(20,24,29,.16);
  --line-soft:rgba(20,24,29,.09);
  --line-dark:rgba(145,166,178,.24);

  /* 字体 */
  --font-display:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','Roboto Mono','SFMono-Regular',monospace;

  /* 节奏 */
  --baseline:8px;
  --maxw:1280px;
  --edge:clamp(16px,4vw,56px);
  --radius-s:2px;
  --radius-pill:999px;
}

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

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

body{
  margin:0;
  font-family:var(--font-display);
  font-size:17px;
  line-height:1.75;
  color:var(--graphite);
  background:var(--sand);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}

img,svg,video{display:block;max-width:100%;height:auto;}

button{font:inherit;color:inherit;}

ul,ol{list-style:none;}

a{color:inherit;}

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

#main-content{
  display:block;
  scroll-margin-top:96px;
}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{
  margin:0 0 .4em;
  font-weight:900;
  font-style:italic;
  line-height:1.02;
  letter-spacing:-.02em;
  color:var(--ink);
}

h1{font-size:clamp(2.5rem,7vw,6rem);}
h2{font-size:clamp(1.75rem,4.4vw,3.5rem);}
h3{font-size:clamp(1.25rem,2.4vw,1.9rem);}
h4{font-size:clamp(1.05rem,1.8vw,1.3rem);font-style:normal;}

p{margin:0 0 1em;}

/* ---------- 排版工具类 ---------- */
.mono{font-family:var(--font-mono);letter-spacing:.04em;}

.num{
  font-family:var(--font-mono);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:.01em;
  color:var(--orange);
}

.num--lime{color:var(--lime);}
.num--cyan{color:var(--cyan);}

.label{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--teal);
}

.lede{
  font-size:clamp(1.05rem,1.6vw,1.25rem);
  line-height:1.72;
  max-width:46ch;
  color:#39424C;
}

.prose{max-width:720px;}
.prose p{margin-bottom:1.1em;}
.prose a{
  color:var(--wine);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.prose a:hover{color:var(--orange);}

.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--edge);
}

/* ---------- 通用网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,32px);}

.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}

.grid--auto{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:.85em 1.6em;
  font-size:.9rem;
  font-weight:800;
  letter-spacing:.04em;
  text-decoration:none;
  border:1px solid transparent;
  border-radius:var(--radius-s);
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}

.btn:hover{transform:translateY(-2px);}

.btn--primary{
  background:var(--orange);
  color:var(--white);
  border-color:var(--orange);
}
.btn--primary:hover{box-shadow:0 12px 26px -14px rgba(242,78,30,.95);}

.btn--ghost{
  background:transparent;
  color:var(--ink);
  border-color:var(--ink);
}
.btn--ghost:hover{background:var(--ink);color:var(--white);}

.btn--cyan{
  background:var(--cyan);
  color:var(--ink);
  border-color:var(--cyan);
}
.btn--cyan:hover{box-shadow:0 12px 26px -16px rgba(22,217,227,.95);}

/* ---------- 面包屑 ---------- */
.crumb{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
}

.crumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5em;
  margin:0;
  padding:0;
  color:var(--slate);
}

.crumb-list li{display:inline-flex;align-items:center;gap:.5em;}

.crumb-list li + li::before{
  content:"/";
  color:var(--slate);
  opacity:.55;
}

.crumb-link{
  color:var(--graphite);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.crumb-link:hover{color:var(--orange);border-color:var(--orange);}
.crumb-link[aria-current="page"]{color:var(--slate);pointer-events:none;}

/* ---------- 编号章节 ---------- */
.section{padding-block:clamp(44px,6vw,92px);}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px 18px;
  margin-bottom:clamp(20px,3vw,36px);
  padding-top:16px;
  border-top:1px solid var(--line-strong);
}

.section-num{
  font-family:var(--font-mono);
  font-size:clamp(24px,3vw,36px);
  font-weight:700;
  line-height:1;
  color:var(--orange);
}

.section-title{
  margin:0;
  font-size:clamp(1.6rem,3.6vw,2.75rem);
}

/* ---------- 图片容器基础规则 ---------- */
.img-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:4 / 3;
  background:var(--ink);
  border:1px solid var(--line-dark);
}

.img-frame > img,
.img-frame > picture{
  display:block;
  width:100%;
  height:100%;
}

.img-frame > img,
.img-frame > picture > img{
  object-fit:cover;
}

.img-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(115deg,rgba(10,26,47,.62) 0%,rgba(10,26,47,.14) 44%,rgba(242,78,30,.22) 100%);
}

.img-frame--plain::after{display:none;}

.img-frame--slant{
  clip-path:polygon(0 0,100% 0,100% calc(100% - 32px),calc(100% - 32px) 100%,0 100%);
}

.img-frame--speed > img{
  filter:contrast(1.06) saturate(1.1);
}

.img-frame--speed::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.5;
  background:repeating-linear-gradient(90deg,rgba(22,217,227,.18) 0 1px,transparent 1px 14px);
}

.img-frame--tall{aspect-ratio:3 / 4;}
.img-frame--wide{aspect-ratio:16 / 9;}
.img-frame--square{aspect-ratio:1 / 1;}

.img-caption{
  margin-top:.6em;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--slate);
}

/* ============================================================
   页头：悬浮胶囊浮岛
   ============================================================ */

.skip-link{
  position:absolute;
  top:-100px;
  left:var(--edge);
  z-index:300;
  padding:10px 18px;
  background:var(--lime);
  color:var(--ink);
  font-size:13px;
  font-weight:800;
  text-decoration:none;
  border-radius:var(--radius-s);
  transition:top .16s ease;
}
.skip-link:focus{top:10px;}

.site-header{
  position:sticky;
  top:0;
  z-index:120;
  padding:clamp(8px,1.2vw,14px) var(--edge);
}

.header-inner{
  position:relative;
  display:flex;
  align-items:center;
  gap:clamp(8px,1.4vw,20px);
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:7px 8px 7px 16px;
  background:rgba(10,26,47,.975);
  border:1px solid rgba(145,166,178,.28);
  border-radius:var(--radius-pill);
  box-shadow:0 16px 36px -22px rgba(10,26,47,.95);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  text-decoration:none;
  color:var(--white);
}

.brand-mark{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  flex:0 0 auto;
  background:var(--orange);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:700;
  font-style:italic;
  line-height:1;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}

.brand-text{
  font-size:19px;
  font-weight:900;
  font-style:italic;
  letter-spacing:.02em;
  white-space:nowrap;
  transition:color .18s ease;
}
.brand:hover .brand-text{color:var(--lime);}

.brand-coord{
  padding-left:10px;
  border-left:1px solid rgba(22,217,227,.4);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--cyan);
  white-space:nowrap;
}

/* 导航 */
.nav-capsule{margin-inline:auto;}

.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
  margin:0;
  padding:0;
}

.nav-link{
  display:block;
  position:relative;
  padding:9px 15px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-size:14px;
  font-weight:500;
  color:#C6D4DD;
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease,transform .18s ease;
}

.nav-link:hover,
.nav-link:focus-visible{
  color:var(--white);
  border-color:var(--cyan);
  transform:translateY(-2px);
}

.nav-link[aria-current="page"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
  font-weight:800;
}

/* 右侧动作区 */
.header-actions{
  display:flex;
  align-items:center;
  gap:8px;
  flex:0 0 auto;
}

.entry-pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:9px 15px;
  background:var(--orange);
  border:1px solid var(--orange);
  border-radius:var(--radius-pill);
  color:var(--white);
  font-size:13px;
  font-weight:800;
  letter-spacing:.04em;
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .18s ease,transform .18s ease,box-shadow .18s ease;
}

.entry-pill:hover{
  background:#FF5C2B;
  transform:translateY(-2px);
  box-shadow:0 10px 22px -12px rgba(242,78,30,.95);
}

.entry-dot{
  width:7px;
  height:7px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--lime);
  animation:dotPulse 2.6s ease-out infinite;
}

@keyframes dotPulse{
  0%,100%{box-shadow:0 0 0 0 rgba(201,255,61,.55);}
  50%{box-shadow:0 0 0 6px rgba(201,255,61,0);}
}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:40px;
  height:40px;
  padding:0;
  background:transparent;
  border:1px solid rgba(22,217,227,.45);
  border-radius:50%;
  color:var(--cyan);
  cursor:pointer;
  transition:border-color .18s ease,background-color .18s ease;
}

.nav-toggle:hover{
  border-color:var(--cyan);
  background:rgba(22,217,227,.12);
}

.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:top .2s ease,transform .2s ease;
}

.nav-toggle-bars::before{top:-5px;}
.nav-toggle-bars::after{top:5px;}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars{background:transparent;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:0;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:0;transform:rotate(-45deg);}

/* 滚动进度线 */
.header-progress{
  position:absolute;
  left:30px;
  right:30px;
  bottom:3px;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  pointer-events:none;
  will-change:transform;
}

/* ============================================================
   页脚：深墨蓝记分牌
   ============================================================ */

.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,128px);
  padding:clamp(40px,6vw,76px) var(--edge) 0;
  color:#B9C8D2;
  background-color:var(--ink);
  background-image:
    repeating-linear-gradient(0deg,rgba(145,166,178,.09) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(90deg,rgba(145,166,178,.09) 0 1px,transparent 1px 72px);
}

.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:var(--edge);
  width:clamp(76px,12vw,168px);
  height:4px;
  background:var(--orange);
}

.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.55fr 1fr 1.35fr 1fr;
  gap:clamp(24px,4vw,56px);
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
}

.footer-brand{min-width:0;}

.footer-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-display);
  font-size:21px;
  font-weight:900;
  font-style:italic;
  letter-spacing:.02em;
  color:var(--white);
  text-decoration:none;
  transition:color .18s ease;
}
.footer-logo:hover{color:var(--lime);}

.footer-tagline{
  margin:16px 0 8px;
  max-width:16ch;
  font-size:17px;
  font-weight:800;
  font-style:italic;
  line-height:1.42;
  color:var(--sand);
}

.footer-note{
  margin:0;
  max-width:34ch;
  font-size:12.5px;
  line-height:1.75;
  color:#8FA3B0;
}

.footer-col{min-width:0;}

.footer-col-title{
  display:flex;
  align-items:center;
  gap:10px;
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}

.footer-col-title::before{
  content:"";
  width:14px;
  height:1px;
  background:var(--cyan);
}

.footer-nav{
  display:grid;
  gap:10px;
  margin:0;
  padding:0;
}

.footer-link{
  display:inline-block;
  font-size:14px;
  color:#C6D4DD;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease,transform .18s ease;
}

.footer-link:hover{
  color:var(--lime);
  border-color:var(--lime);
  transform:translateX(2px);
}

.footer-contact{
  display:grid;
  gap:14px;
  margin:0;
  padding:0;
  font-size:14px;
}

.footer-label{
  display:block;
  margin-bottom:3px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  color:var(--slate);
}

.footer-addr{
  display:block;
  font-size:13.5px;
  line-height:1.65;
  color:#C6D4DD;
}

.footer-contact + .footer-note{margin-top:14px;}

/* 可复制文本 */
.copy-inline{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:0;
  background:none;
  border:0;
  border-bottom:1px dashed rgba(22,217,227,.45);
  color:#E8F1F5;
  font-size:13.5px;
  text-align:left;
  cursor:pointer;
  transition:color .18s ease,border-color .18s ease;
}

.copy-inline:hover{
  color:var(--cyan);
  border-color:var(--cyan);
}

.copy-inline-hint{
  padding:1px 5px;
  border:1px solid rgba(22,217,227,.5);
  border-radius:4px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--cyan);
  transition:color .18s ease,background-color .18s ease,border-color .18s ease;
}

.copy-inline[data-copied="true"] .copy-inline-hint{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--ink);
}

.footer-icp{
  margin:18px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:#8FA3B0;
}

.footer-bottom{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 24px;
  width:100%;
  max-width:var(--maxw);
  margin:clamp(30px,4vw,52px) auto 0;
  padding:18px 0 26px;
  border-top:1px solid rgba(145,166,178,.22);
}

.footer-tail{
  margin:0;
  font-size:12.5px;
  color:#8FA3B0;
}

/* ============================================================
   响应式
   ============================================================ */

@media (max-width:1180px){
  .brand-coord{display:none;}
}

@media (max-width:980px){
  .header-inner{
    padding:6px 6px 6px 14px;
    gap:8px;
  }

  .header-actions{margin-left:auto;}

  .nav-toggle{display:inline-flex;}

  .nav-capsule{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    margin:0;
    padding:10px;
    display:none;
    background:rgba(10,26,47,.985);
    border:1px solid rgba(22,217,227,.35);
    border-radius:22px;
    box-shadow:0 26px 50px -24px rgba(0,0,0,.9);
  }

  .nav-capsule[data-open]{
    display:block;
    animation:navIn .18s ease-out;
  }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
  }

  .nav-link{
    padding:12px 16px;
    border-radius:12px;
    border-color:rgba(145,166,178,.18);
    font-size:15px;
  }

  .nav-link:hover,
  .nav-link:focus-visible{transform:none;}

  .nav-link[aria-current="page"]{border-color:var(--cyan);border-radius:12px;}

  .header-progress{left:20px;right:20px;}

  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 40px;}
}

@keyframes navIn{
  from{opacity:0;transform:translateY(-8px);}
  to{opacity:1;transform:translateY(0);}
}

@media (max-width:720px){
  body{font-size:16px;}
  .grid--12{grid-template-columns:repeat(4,minmax(0,1fr));}
  .img-frame--tall{aspect-ratio:4 / 5;}
}

@media (max-width:620px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (max-width:430px){
  .brand-mark{width:28px;height:28px;font-size:11px;}
  .brand-text{font-size:16px;}
  .entry-pill{padding:8px 11px;font-size:12px;}
  .nav-toggle{width:36px;height:36px;}
}

/* 减弱动态效果 */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover,
  .nav-link:hover,
  .entry-pill:hover,
  .footer-link:hover{transform:none;}
}