/* ==========================================================================
   长城体育 · 共享样式表 /assets/site.css
   令牌 → 重置 → 基础排版 → 布局 → 头部 → 页脚 → 组件 → 工具 → 响应式
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  /* 品牌色 */
  --c-gray:#4A5157;        /* 长城灰 */
  --c-ink:#22262A;         /* 城墙深灰 */
  --c-stone:#8A9299;       /* 石板浅灰 */
  --c-cream:#F5F2EA;       /* 赛季米白 */
  --c-orange:#F26B1D;      /* 烽火橙 */
  --c-orange-soft:#FFC08A; /* 烽火橙浅 */
  --c-green:#103A32;       /* 深墨绿 */
  --c-indigo:#2C2C63;      /* 靛紫 */
  --c-wine:#7A1F2B;        /* 酒红 */
  --c-red:#D8202F;         /* 赛场红 */
  --c-amber:#E8A33D;       /* 琥珀黄 */

  /* 线与面 */
  --rule-dark:rgba(34,38,42,.16);
  --rule-strong:rgba(34,38,42,.34);
  --rule-light:rgba(245,242,234,.16);
  --tint-orange:rgba(242,107,29,.10);
  --tint-cream:rgba(245,242,234,.06);

  /* 字体 */
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  /* 尺寸与节奏 */
  --shell-w:1280px;
  --gutter:clamp(16px,4vw,44px);
  --radius:2px;
  --rail-w:248px;
  --sticky-top:72px;
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--rule-dark);margin:0}
:focus-visible{outline:2px solid var(--c-orange);outline-offset:2px}

/* ---------- 3. 基础排版 ---------- */
body{
  display:flex;
  flex-direction:column;
  min-height:100vh;
  background:var(--c-cream);
  color:var(--c-ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
main{display:block;flex:1 0 auto}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.2;letter-spacing:-.01em}
p{text-wrap:pretty}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.02em}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.skip-link{
  position:absolute;left:16px;top:-120px;z-index:200;
  display:inline-flex;align-items:center;
  padding:10px 18px;background:var(--c-orange);color:#1A1D20;
  font-weight:700;font-size:14px;border-radius:var(--radius);
}
.skip-link:focus{top:12px}

/* ---------- 4. 布局骨架 ---------- */
.shell{width:100%;max-width:var(--shell-w);margin-inline:auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.section{padding-block:clamp(48px,6vw,96px)}
.section--tight{padding-block:clamp(28px,3.4vw,52px)}
.stack{display:flex;flex-direction:column;gap:var(--stack-gap,18px)}
.divider{border-top:1px solid var(--rule-dark);height:0}
.divider--light{border-top-color:var(--rule-light)}
.texture{
  background-image:
    repeating-linear-gradient(90deg,rgba(34,38,42,.05) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(0deg,rgba(34,38,42,.04) 0 1px,transparent 1px 96px);
}
.split{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.split--wide{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}
.split>*{min-width:0}
.split__main{padding-right:clamp(20px,3vw,48px)}
.split__aside{border-left:1px solid var(--rule-dark);padding-left:clamp(20px,3vw,40px)}
.rail{position:sticky;top:var(--sticky-top);width:var(--rail-w);align-self:start}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr))}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(16px,2vw,28px)}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2vw,28px)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* 珠宝色分区 */
.zone--cream{background:var(--c-cream);color:var(--c-ink)}
.zone--ink{background:var(--c-ink);color:var(--c-cream)}
.zone--green{background:var(--c-green);color:var(--c-cream)}
.zone--indigo{background:var(--c-indigo);color:var(--c-cream)}
.zone--wine{background:var(--c-wine);color:var(--c-cream)}
.zone--gray{background:var(--c-gray);color:var(--c-cream)}
.zone--orange{background:var(--c-orange);color:#1A1D20}
.zone--ink .lead,.zone--green .lead,.zone--indigo .lead,.zone--wine .lead,.zone--gray .lead{color:rgba(245,242,234,.80)}
.zone--ink .divider,.zone--green .divider,.zone--indigo .divider,.zone--wine .divider,.zone--gray .divider{border-top-color:var(--rule-light)}

/* 文字层级 */
.display{font-family:var(--font-display);font-weight:900;font-size:clamp(34px,5.2vw,52px);line-height:1.08;letter-spacing:-.02em}
.section-title{font-family:var(--font-display);font-weight:900;font-size:clamp(22px,2.6vw,28px);line-height:1.25;letter-spacing:-.01em}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--c-orange)}
.zone--ink .eyebrow,.zone--green .eyebrow,.zone--indigo .eyebrow,.zone--wine .eyebrow,.zone--gray .eyebrow{color:var(--c-orange-soft)}
.lead{font-size:17px;line-height:1.7;color:var(--c-gray);max-width:62ch}
.prose{max-width:64ch;font-size:16px;line-height:1.8}
.prose p+p{margin-top:.9em}
.prose strong{font-weight:700}
.prose a{border-bottom:1px solid var(--c-orange)}

/* ---------- 5. 头部：双层信息导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;color:var(--c-ink)}

.brand-bar{background:var(--c-ink);color:var(--c-cream);border-bottom:1px solid var(--rule-light)}
.brand-bar__inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 20px;min-height:58px;padding-block:9px}
.brand{display:inline-flex;align-items:center;gap:12px;padding-block:2px}
.brand__mark{display:inline-flex;align-items:flex-end;gap:3px;height:26px;flex:none}
.brand__mark i{display:block;width:5px;background:var(--c-orange)}
.brand__mark i:nth-child(1){height:11px}
.brand__mark i:nth-child(2){height:18px}
.brand__mark i:nth-child(3){height:26px}
.brand__text{display:block;line-height:1.25}
.brand__name{display:block;font-family:var(--font-display);font-weight:900;font-size:19px;letter-spacing:.02em;color:var(--c-cream);transition:color 120ms linear}
.brand__line{display:block;font-size:12px;letter-spacing:.08em;color:rgba(245,242,234,.62);transition:color 120ms linear}
.brand:hover .brand__name,.brand:hover .brand__line{color:var(--c-orange-soft)}
.brand-bar__meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.batch-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border:1px solid var(--rule-light);border-radius:var(--radius);
  background:var(--tint-cream);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;
  color:rgba(245,242,234,.82);
}
.batch-badge__dot{width:7px;height:7px;flex:none;background:var(--c-orange)}

.nav-bar{position:relative;background:var(--c-cream);border-bottom:1px solid var(--rule-dark)}
.nav-bar__inner{display:flex;align-items:stretch;justify-content:space-between;gap:16px;min-height:54px}
.primary-nav{display:flex;align-items:stretch}
.primary-nav__list{display:flex;align-items:stretch;flex-wrap:wrap}
.primary-nav__list>li{display:flex;align-items:stretch}
.primary-nav__list>li+li{border-left:1px solid var(--rule-dark)}
.nav-link{
  display:inline-flex;align-items:center;padding:0 18px;
  font-size:14.5px;font-weight:500;color:var(--c-gray);
  box-shadow:inset 0 -2px 0 transparent;
  transition:color 120ms linear,background-color 120ms linear,box-shadow 120ms linear;
}
.nav-link:hover{color:var(--c-ink);background:var(--tint-orange);box-shadow:inset 0 -2px 0 var(--c-orange-soft)}
.nav-link[aria-current="page"]{color:var(--c-ink);font-weight:700;box-shadow:inset 0 -2px 0 var(--c-orange)}
.nav-bar__aside{display:flex;align-items:center;gap:12px;padding-block:8px}
.meter{display:block;width:108px;height:4px;flex:none;background:var(--rule-dark)}
.meter__bar{display:block;height:100%;width:0;background:var(--c-orange)}
.meter__value{font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--c-stone);min-width:3.4em;text-align:right}
.nav-bar__cta{display:none}
.site-header[data-scrolled="true"] .brand-bar{display:none}
.site-header[data-scrolled="true"] .nav-bar__cta{display:inline-flex}

/* 移动导航按钮 */
.nav-toggle{display:none;align-items:center;gap:10px;padding:12px 0;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--c-ink)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:20px}
.nav-toggle__bars i{display:block;width:100%;height:2px;background:var(--c-ink);transition:transform 140ms linear,opacity 140ms 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)}

/* ---------- 6. 页脚 ---------- */
.site-footer{background:var(--c-ink);color:var(--c-cream)}
.footer-band{
  height:6px;
  background:linear-gradient(90deg,
    var(--c-orange) 0 25%,
    var(--c-green) 25% 50%,
    var(--c-indigo) 50% 75%,
    var(--c-wine) 75% 100%);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:clamp(28px,4vw,64px);
  padding-block:clamp(38px,5vw,72px);
}
.footer-brand{display:flex;flex-direction:column;gap:16px;border-left:2px solid var(--c-orange);padding-left:18px}
.footer-brand .brand__line{color:var(--c-stone)}
.footer-brand__note{font-size:14px;line-height:1.7;color:rgba(245,242,234,.72);max-width:34ch}
.footer-contact{border-top:1px solid var(--rule-light);padding-top:16px}
.footer-contact__title{font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.12em;color:var(--c-stone)}
.footer-contact__list{display:grid;gap:9px;margin-top:12px}
.footer-contact__row{display:grid;grid-template-columns:76px minmax(0,1fr);gap:10px;align-items:baseline}
.footer-contact__key{font-size:12.5px;letter-spacing:.04em;color:var(--c-stone)}
.footer-contact__val{font-family:var(--font-mono);font-size:13.5px;font-variant-numeric:tabular-nums;color:var(--c-cream);word-break:break-word}
.footer-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--rule-light)}
.footer-group{padding:20px 18px 0;border-right:1px solid var(--rule-light)}
.footer-group:first-child{padding-left:0}
.footer-group:last-child{border-right:0;padding-right:0}
.footer-group__title{display:flex;align-items:center;gap:9px;font-family:var(--font-display);font-size:15px;font-weight:900;letter-spacing:.06em}
.footer-group__mark{width:10px;height:10px;flex:none;background:var(--c-orange)}
.footer-group:nth-child(2) .footer-group__mark{background:var(--c-amber)}
.footer-group:nth-child(3) .footer-group__mark{background:var(--c-stone)}
.footer-links{display:flex;flex-direction:column;margin-top:12px}
.footer-link{
  display:inline-flex;align-items:center;padding:6px 0;
  font-size:14px;color:rgba(245,242,234,.78);
  border-bottom:1px solid transparent;
  transition:color 120ms linear,border-color 120ms linear;
}
.footer-link:hover{color:var(--c-orange-soft);border-bottom-color:var(--c-orange)}
.footer-bottom{border-top:1px solid var(--rule-light);background:rgba(0,0,0,.18)}
.footer-bottom__inner{display:flex;flex-wrap:wrap;align-items:center;gap:8px 22px;padding-block:14px}
.footer-icp{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:rgba(245,242,234,.66)}
.footer-copy{font-size:12.5px;color:var(--c-stone)}
.footer-note{font-size:12.5px;color:var(--c-stone);margin-left:auto}

/* ---------- 7. 组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border:1px solid transparent;border-radius:var(--radius);
  font-size:14px;font-weight:700;letter-spacing:.02em;cursor:pointer;
  transition:background-color 120ms linear,color 120ms linear,border-color 120ms linear,box-shadow 120ms linear;
}
.btn--primary{background:var(--c-orange);color:#1A1D20;border-color:var(--c-orange)}
.btn--primary:hover{background:var(--c-orange-soft);border-color:var(--c-orange-soft);color:#1A1D20}
.btn--ghost{background:transparent;border-color:rgba(245,242,234,.34);color:var(--c-cream)}
.btn--ghost:hover{background:var(--tint-orange);border-color:var(--c-orange);color:var(--c-orange-soft)}
.btn--outline{background:transparent;border-color:var(--rule-strong);color:var(--c-ink)}
.btn--outline:hover{border-color:var(--c-orange);color:var(--c-orange);box-shadow:inset 0 0 0 1px var(--c-orange)}
.btn--sm{padding:7px 14px;font-size:13px}
.btn--block{width:100%}

.card{
  position:relative;padding:clamp(18px,2vw,26px);
  background:var(--c-cream);border:1px solid var(--rule-dark);border-radius:var(--radius);
  transition:border-color 120ms linear,box-shadow 120ms linear;
}
.card:hover{border-color:var(--c-orange);box-shadow:inset 0 0 0 1px var(--c-orange)}
.card--dark{background:var(--c-ink);color:var(--c-cream);border-color:var(--rule-light)}
.card__title{font-family:var(--font-display);font-weight:900;font-size:18px;line-height:1.3}
.card__meta{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--c-stone)}

.index-list{display:flex;flex-direction:column;border-top:1px solid var(--rule-dark)}
.index-list__item{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:center;
  padding:12px 0;border-bottom:1px solid var(--rule-dark);
  transition:background-color 120ms linear,padding-left 120ms linear;
}
.index-list__item:hover{background:var(--tint-orange);padding-left:10px}
.index-list__num{font-family:var(--font-mono);font-size:13px;color:var(--c-stone)}
.index-list__label{font-size:15px}
.index-list__meta{font-family:var(--font-mono);font-size:12.5px;color:var(--c-stone)}

.table__wrap{overflow-x:auto}
.table{width:100%;font-size:14.5px;border-top:1px solid var(--rule-dark)}
.table th{
  padding:10px 12px;text-align:left;
  font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.1em;
  color:var(--c-stone);white-space:nowrap;border-bottom:1px solid var(--rule-dark);
}
.table td{padding:12px;vertical-align:top;border-bottom:1px solid var(--rule-dark)}
.table tbody tr:hover{background:rgba(74,81,87,.07)}

.figure{
  position:relative;display:block;overflow:hidden;border-radius:var(--radius);
  background-color:var(--c-gray);
  background-image:
    repeating-linear-gradient(90deg,rgba(245,242,234,.08) 0 1px,transparent 1px 88px),
    linear-gradient(160deg,rgba(242,107,29,.22),rgba(16,58,50,.55) 55%,rgba(34,38,42,.92));
}
.figure--wide{aspect-ratio:16/7}
.figure--band{aspect-ratio:21/9}
.figure--tall{aspect-ratio:4/5}
.figure--square{aspect-ratio:1/1}
.figure img{width:100%;height:100%;object-fit:cover}
.figure::after{content:"";position:absolute;inset:0;border:1px solid rgba(245,242,234,.22);pointer-events:none}
.figure__cap{
  position:absolute;left:0;right:0;bottom:0;padding:8px 12px;
  background:linear-gradient(transparent,rgba(34,38,42,.78));
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:rgba(245,242,234,.92);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 12px;border:1px solid var(--rule-dark);border-radius:var(--radius);
  font-size:13px;color:var(--c-gray);background:transparent;cursor:pointer;
  transition:border-color 120ms linear,color 120ms linear,background-color 120ms linear;
}
.tag:hover{border-color:var(--c-orange);color:var(--c-ink)}
.tag[aria-pressed="true"]{background:var(--c-orange);border-color:var(--c-orange);color:#1A1D20;font-weight:700}

.badge{
  display:inline-flex;align-items:center;gap:8px;padding:5px 10px;
  border:1px solid var(--rule-dark);border-radius:var(--radius);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--c-gray);
}
.badge--orange{border-color:var(--c-orange);color:var(--c-orange)}

.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--c-stone)}
.crumbs__item{display:inline-flex;align-items:center;gap:8px}
.crumbs__item+.crumbs__item::before{content:"/";color:var(--rule-strong)}
.crumbs__link{color:var(--c-gray);border-bottom:1px solid transparent;transition:color 120ms linear,border-color 120ms linear}
.crumbs__link:hover{color:var(--c-orange);border-bottom-color:var(--c-orange)}

.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:10px 14px;background:var(--c-ink);color:var(--c-cream);
  border:1px solid var(--rule-light);border-radius:var(--radius);
  font-size:13px;font-weight:700;letter-spacing:.04em;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity 120ms linear,visibility 120ms linear,background-color 120ms linear,color 120ms linear;
}
.to-top[data-visible="true"]{opacity:1;visibility:visible;pointer-events:auto}
.to-top:hover{background:var(--c-orange);border-color:var(--c-orange);color:#1A1D20}

/* ---------- 8. 响应式 ---------- */
@media (max-width:1100px){
  .split,.split--wide{grid-template-columns:minmax(0,1fr)}
  .split__main{padding-right:0}
  .split__aside{margin-top:26px;padding-left:0;padding-top:26px;border-left:0;border-top:1px solid var(--rule-dark)}
  .rail{position:static;width:auto}
  .col-4,.col-5,.col-7,.col-8{grid-column:span 12}
}

@media (max-width:900px){
  .nav-bar__inner{min-height:52px;align-items:center}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;background:var(--c-cream);
    border-bottom:2px solid var(--c-orange);
    max-height:min(70vh,520px);overflow-y:auto;
  }
  .primary-nav[data-open="true"]{display:block}
  .primary-nav__list{flex-direction:column;flex-wrap:nowrap}
  .primary-nav__list>li+li{border-left:0;border-top:1px solid var(--rule-dark)}
  .primary-nav__list>li{display:block}
  .nav-link{width:100%;padding:14px 20px;font-size:15px;box-shadow:inset 3px 0 0 transparent}
  .nav-link:hover,.nav-link[aria-current="page"]{color:var(--c-ink);background:var(--tint-orange);box-shadow:inset 3px 0 0 var(--c-orange)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:30px}
  .footer-groups{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media (max-width:640px){
  .display{font-size:clamp(30px,9vw,40px)}
  .grid-2,.grid-3{grid-template-columns:minmax(0,1fr)}
  .col-6{grid-column:span 12}
  .brand__line,.batch-badge,.brand-bar__meta .btn--ghost{display:none}
  .brand-bar__inner{min-height:52px}
  .meter,.meter__value{display:none}
  .footer-groups{grid-template-columns:minmax(0,1fr);border-top:0}
  .footer-group{border-right:0;border-top:1px solid var(--rule-light);padding:18px 0 0}
  .footer-contact__row{grid-template-columns:minmax(0,1fr);gap:2px}
  .footer-note{margin-left:0}
}

/* ---------- 9. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important}
  .primary-nav,.nav-toggle__bars i,.to-top,.nav-link,.footer-link,.btn{transition:none!important}
}