/* ==========================================================================
   火博体育 · 中国站 — 共享样式表  /assets/site.css
   夜场氛围 · 主客场双色 · 海报式分层 · 15° 斜向切割
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root{
  --flame:#FF4D1C;
  --lava:#B3210E;
  --gold:#F5B841;
  --ink:#12100E;
  --away:#4E6B85;
  --slate:#8FA6B8;
  --indigo:#1B2A44;
  --wine:#6E1E2C;
  --paper:#F6F1EA;
  --hair:#D8D2C8;

  --ink-70:rgba(18,16,14,.70);
  --ink-54:rgba(18,16,14,.54);
  --paper-80:rgba(246,241,234,.80);
  --paper-72:rgba(246,241,234,.72);
  --paper-44:rgba(246,241,234,.44);
  --line-dark:rgba(246,241,234,.14);
  --line-light:rgba(18,16,14,.10);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,"Noto Sans Mono",monospace;

  --shell:1280px;
  --gutter:clamp(16px,4vw,40px);
  --radius:2px;
  --shadow-soft:0 1px 0 rgba(18,16,14,.06),0 14px 34px -24px rgba(18,16,14,.5);
  --t-fast:120ms ease;
  --t-base:240ms cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset & 基础排版 ---------- */
*,*::before,*::after{box-sizing:border-box;}

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

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(15px,1.05vw,17px);
  font-weight:400;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

main{display:block;}

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

a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;}
ul,ol{margin:0;padding:0;list-style:none;}

h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.25;
  letter-spacing:-.01em;
}

p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}

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

:target{scroll-margin-top:150px;}

/* ---------- 3. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  left:50%;
  top:0;
  z-index:200;
  transform:translate(-50%,-130%);
  background:var(--flame);
  color:#fff;
  padding:11px 22px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  border-radius:0 0 var(--radius) var(--radius);
  transition:transform var(--t-base);
}
.skip-link:focus{transform:translate(-50%,0);color:#fff;}

/* ---------- 4. 刊头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--ink);
  color:var(--paper);
  border-bottom:1px solid var(--line-dark);
  transition:box-shadow var(--t-base);
}
.site-header[data-scrolled="true"]{
  box-shadow:0 22px 44px -32px rgba(0,0,0,.95);
}

.header-shell{
  width:min(var(--shell),100%);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.header-top{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;
  gap:16px;
  padding-block:clamp(14px,2.2vw,26px);
  transition:padding-block var(--t-base);
}
.site-header[data-scrolled="true"] .header-top{padding-block:8px;}

.header-region{
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--paper-44);
  white-space:nowrap;
  justify-self:start;
}

.brand{
  display:inline-flex;
  align-items:baseline;
  gap:10px;
  justify-self:center;
  color:var(--paper);
  line-height:1;
  transition:color var(--t-fast);
}
.brand:hover{color:var(--gold);}

.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(22px,3.4vw,40px);
  letter-spacing:-.02em;
  transition:font-size var(--t-base);
}
.site-header[data-scrolled="true"] .brand-name{font-size:clamp(18px,2.1vw,24px);}

.brand-tail{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(10px,1.05vw,13px);
  letter-spacing:.2em;
  color:var(--gold);
  padding-bottom:.4em;
}

.header-tools{
  display:flex;
  align-items:center;
  gap:clamp(12px,1.8vw,22px);
  justify-self:end;
}

.tool-link{
  position:relative;
  padding:4px 0;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--paper-72);
  white-space:nowrap;
  transition:color var(--t-fast);
}
.tool-link::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--t-fast);
}
.tool-link:hover,
.tool-link:focus-visible{color:var(--gold);}
.tool-link:hover::after,
.tool-link:focus-visible::after{transform:scaleX(1);}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  position:relative;
  width:46px;
  height:38px;
  padding:0;
  border:1px solid var(--line-dark);
  border-radius:var(--radius);
  cursor:pointer;
  justify-self:end;
  transition:border-color var(--t-fast),background var(--t-fast);
}
.nav-toggle:hover{border-color:var(--flame);}
.nav-toggle__bar{
  position:absolute;
  left:11px;
  right:11px;
  height:2px;
  background:var(--paper);
  transition:transform var(--t-base),opacity var(--t-fast);
}
.nav-toggle__bar:nth-child(1){top:12px;}
.nav-toggle__bar:nth-child(2){top:18px;}
.nav-toggle__bar:nth-child(3){top:24px;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* 导航 */
.site-nav{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  border-top:1px solid var(--line-dark);
}

.nav-list{
  display:flex;
  align-items:stretch;
  flex-wrap:wrap;
  justify-content:center;
}

.nav-item{display:flex;}
.nav-item + .nav-item{border-left:1px solid var(--line-dark);}

.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  padding:15px clamp(12px,2vw,26px);
  font-size:clamp(13px,1.02vw,15px);
  letter-spacing:.06em;
  color:var(--paper-72);
  transition:color var(--t-fast),background var(--t-fast),padding var(--t-base);
}
.site-header[data-scrolled="true"] .nav-link{padding-block:11px;}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:9px;
  width:0;
  height:2px;
  background:var(--flame);
  transform:translateX(-50%);
  transition:width var(--t-base);
}
.nav-link:hover,
.nav-link:focus-visible{color:var(--paper);background:rgba(255,77,28,.08);}
.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after{width:22px;}
.nav-link[aria-current="page"]{color:var(--paper);}

.nav-item--cta{border-left:1px solid var(--line-dark);}
.nav-cta{
  display:flex;
  align-items:center;
  padding:15px clamp(14px,1.9vw,24px);
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  color:#fff;
  background:var(--flame);
  transition:background var(--t-fast),color var(--t-fast);
}
.site-header[data-scrolled="true"] .nav-cta{padding-block:11px;}
.nav-cta:hover,
.nav-cta:focus-visible{background:var(--lava);color:#fff;}

/* 阅读进度 */
.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  z-index:3;
  background:linear-gradient(90deg,var(--flame),var(--gold));
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
  will-change:transform;
}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink);
  color:var(--paper);
  padding-top:clamp(48px,7vw,96px);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:4px;
  background:linear-gradient(90deg,var(--flame) 0 34%,var(--away) 34% 100%);
}
.site-footer::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:clamp(180px,32vw,380px);
  pointer-events:none;
  background:linear-gradient(160deg,rgba(255,77,28,.10) 0 30%,transparent 30.4%);
}

.footer-shell{
  position:relative;
  z-index:1;
  width:min(var(--shell),100%);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.footer-brand{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  grid-template-areas:
    "logo claim"
    "logo scope";
  align-items:center;
  column-gap:clamp(20px,4vw,52px);
  row-gap:2px;
  padding-bottom:clamp(26px,4vw,46px);
  border-bottom:1px solid var(--line-dark);
}

.footer-logo{
  grid-area:logo;
  display:inline-flex;
  align-items:baseline;
  gap:9px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(24px,3vw,34px);
  letter-spacing:-.02em;
  color:var(--paper);
  line-height:1;
  transition:color var(--t-fast);
}
.footer-logo:hover{color:var(--flame);}

.footer-logo__tail{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--gold);
  padding-bottom:.4em;
}

.footer-claim{
  grid-area:claim;
  margin:0;
  font-size:clamp(15px,1.5vw,19px);
  font-weight:700;
  letter-spacing:.02em;
  color:var(--paper-80);
}

.footer-scope{
  grid-area:scope;
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--slate);
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(24px,3.5vw,48px);
  padding-block:clamp(30px,4.5vw,56px);
}

.footer-col__title{
  display:flex;
  align-items:center;
  gap:9px;
  margin-bottom:16px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  color:var(--paper);
}
.footer-col__title::before{
  content:"";
  flex:0 0 auto;
  width:14px;
  height:2px;
  background:var(--flame);
}

.footer-links{
  display:flex;
  flex-direction:column;
  gap:11px;
}
.footer-links a{
  display:inline-block;
  font-size:13.5px;
  line-height:1.6;
  color:var(--paper-72);
  transition:color var(--t-fast),padding-left var(--t-fast);
}
.footer-links a:hover,
.footer-links a:focus-visible{color:var(--gold);padding-left:6px;}

.footer-meta{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-meta li{
  font-size:13px;
  line-height:1.7;
  color:var(--paper-72);
}
.footer-meta__key{
  display:block;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  color:var(--slate);
  margin-bottom:2px;
}

.footer-base{
  position:relative;
  z-index:1;
  border-top:1px solid var(--line-dark);
  margin-top:clamp(8px,1.5vw,18px);
}

.footer-base__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  padding-block:22px;
}

.footer-legal,
.footer-copy{
  margin:0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--paper-44);
}

.footer-base__links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 22px;
}
.footer-base__links a{
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--paper-44);
  transition:color var(--t-fast);
}
.footer-base__links a:hover,
.footer-base__links a:focus-visible{color:var(--gold);}

/* ---------- 6. 通用容器与分区 ---------- */
.shell{
  width:min(var(--shell),100%);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{width:min(900px,100%);}

.section{
  position:relative;
  padding-block:clamp(48px,8vw,110px);
}
.section--paper{background:var(--paper);color:var(--ink);}
.section--ink{background:var(--ink);color:var(--paper);}
.section--indigo{background:var(--indigo);color:var(--paper);}
.section--wine{background:var(--wine);color:var(--paper);}

.section--ink .prose,
.section--indigo .prose,
.section--wine .prose{color:var(--paper-72);}
.section--ink .prose > h2,
.section--indigo .prose > h2,
.section--wine .prose > h2{color:var(--paper);}

.section--slanted{overflow:hidden;}
.section--slanted::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(165deg,rgba(255,77,28,.13) 0 36%,transparent 36.4%);
}

.hair{
  height:1px;
  border:0;
  margin:0;
  background:var(--hair);
}
.section--ink .hair,
.section--indigo .hair,
.section--wine .hair{background:var(--line-dark);}

/* ---------- 7. 网格 ---------- */
.grid{
  display:grid;
  gap:clamp(20px,3vw,40px);
}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
.grid--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr));}

/* ---------- 8. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:46px;
  padding:0 24px;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1;
  border:1px solid transparent;
  border-radius:var(--radius);
  cursor:pointer;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast);
}
.btn--solid{background:var(--flame);color:#fff;}
.btn--solid:hover,
.btn--solid:focus-visible{background:var(--lava);color:#fff;transform:translateY(-1px);}

.btn--ghost{border-color:currentColor;color:var(--flame);}
.btn--ghost:hover,
.btn--ghost:focus-visible{background:var(--flame);border-color:var(--flame);color:#fff;}

.btn--quiet{border-color:var(--hair);color:var(--ink);}
.btn--quiet:hover,
.btn--quiet:focus-visible{border-color:var(--flame);color:var(--flame);}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:2px;
  margin:0 0 22px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--ink-54);
}
.breadcrumb li{
  display:inline-flex;
  align-items:center;
}
.breadcrumb li::after{
  content:"/";
  margin:0 9px;
  color:var(--hair);
}
.breadcrumb li:last-child::after{content:"";margin:0;}
.breadcrumb a{color:var(--ink-54);transition:color var(--t-fast);}
.breadcrumb a:hover,
.breadcrumb a:focus-visible{color:var(--flame);}
.breadcrumb [aria-current="page"]{color:var(--flame);}
.section--ink .breadcrumb,
.section--indigo .breadcrumb,
.section--wine .breadcrumb{color:var(--paper-44);}
.section--ink .breadcrumb a,
.section--indigo .breadcrumb a,
.section--wine .breadcrumb a{color:var(--paper-44);}

/* ---------- 10. 正文 ---------- */
.prose{
  max-width:68ch;
  font-size:clamp(15px,1.05vw,17px);
  line-height:1.85;
  color:var(--ink-70);
}
.prose > h2{
  margin:1.7em 0 .55em;
  font-size:clamp(24px,3vw,38px);
  color:var(--ink);
}
.prose > h2:first-child{margin-top:0;}
.prose > h3{
  margin:1.5em 0 .45em;
  font-size:clamp(19px,2vw,24px);
  color:var(--ink);
}
.prose a{
  color:var(--flame);
  box-shadow:inset 0 -1px 0 currentColor;
  transition:color var(--t-fast);
}
.prose a:hover{color:var(--lava);}
.prose ul{
  margin:0 0 1.2em;
  padding-left:0;
}
.prose ul li{
  position:relative;
  padding-left:20px;
  margin-bottom:.5em;
}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.78em;
  width:8px;
  height:2px;
  background:var(--flame);
}

/* ---------- 11. 编号 / 标签 / 分号并列 ---------- */
.section-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(56px,9vw,140px);
  line-height:.82;
  letter-spacing:-.04em;
  color:var(--flame);
  opacity:.18;
  user-select:none;
  transform-origin:left center;
  will-change:transform;
}

.label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  line-height:1.6;
  color:var(--slate);
}
.section--ink .label,
.section--indigo .label,
.section--wine .label{color:var(--slate);}

.dup-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--slate);
}
.dup-list > li{display:inline-flex;align-items:center;}
.dup-list > li + li::before{
  content:";";
  margin:0 9px;
  font-weight:700;
  color:var(--gold);
}

/* ---------- 12. 图片容器 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  background:linear-gradient(152deg,var(--indigo) 0%,var(--ink) 100%);
  border:1px solid var(--hair);
  border-radius:var(--radius);
}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(120% 90% at 16% 112%,rgba(255,77,28,.45) 0%,transparent 58%),
    radial-gradient(90% 70% at 88% -8%,rgba(245,184,65,.26) 0%,transparent 60%);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(18,16,14,0) 44%,rgba(18,16,14,.74) 100%);
}
.media > img{
  position:relative;
  z-index:1;
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--wide{aspect-ratio:21/9;}
.media--16x9{aspect-ratio:16/9;}
.media--4x3{aspect-ratio:4/3;}
.media--3x4{aspect-ratio:3/4;}
.media--square{aspect-ratio:1/1;}

.media__tag{
  position:absolute;
  top:0;
  left:0;
  z-index:3;
  padding:6px 13px;
  background:var(--flame);
  color:#fff;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.12em;
}

.media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:3;
  padding:16px 18px;
  font-size:12.5px;
  line-height:1.6;
  color:var(--paper-80);
}

/* ---------- 13. 显现与数据 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity var(--t-base),transform var(--t-base);
}
.js [data-reveal].is-in{
  opacity:1;
  transform:none;
}

[data-count]{
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1100px){
  .grid--7-5,
  .grid--5-7{grid-template-columns:minmax(0,1fr);}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:900px){
  .header-top{
    grid-template-columns:minmax(0,1fr) auto;
    align-items:center;
  }
  .header-region{display:none;}
  .header-tools{display:none;}
  .brand{justify-self:start;}
  .nav-toggle{display:block;grid-column:2;grid-row:1;}

  .site-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    background:var(--ink);
    border-top:1px solid var(--line-dark);
    max-height:0;
    opacity:0;
    visibility:hidden;
    overflow:hidden;
    transition:max-height .34s ease,opacity .22s ease,visibility .34s;
  }
  .site-nav[data-open]{
    max-height:min(78vh,600px);
    opacity:1;
    visibility:visible;
    overflow-y:auto;
    box-shadow:0 28px 44px -28px rgba(0,0,0,.95);
  }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    flex-wrap:nowrap;
  }
  .nav-item + .nav-item{border-left:0;border-top:1px solid var(--line-dark);}
  .nav-item--cta{border-left:0;border-top:1px solid var(--line-dark);}

  .nav-link{
    padding:15px var(--gutter);
    font-size:15px;
  }
  .site-header[data-scrolled="true"] .nav-link{padding-block:15px;}
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{
    color:var(--flame);
    box-shadow:inset 3px 0 0 var(--flame);
    background:rgba(255,77,28,.07);
  }

  .nav-cta{
    justify-content:center;
    padding:16px var(--gutter);
    font-size:14px;
  }
  .site-header[data-scrolled="true"] .nav-cta{padding-block:16px;}

  .grid--2,
  .grid--3{grid-template-columns:minmax(0,1fr);}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-base__inner{justify-content:flex-start;}
}

@media (max-width:700px){
  .footer-brand{
    grid-template-columns:minmax(0,1fr);
    grid-template-areas:
      "logo"
      "claim"
      "scope";
    row-gap:8px;
    align-items:start;
  }
}

@media (max-width:560px){
  .grid--4{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .brand-tail{display:none;}
  .nav-toggle{width:42px;}
}

/* ---------- 15. 降低动态效果 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{
    opacity:1;
    transform:none;
  }
  .scroll-progress{transition:none;}
  .brand-name{transition:none;}
}