/* ============================================================
   顺发体育 · 共享样式 /assets/site.css
   轨道导航 + 纵向长卷的深蓝橙双色体系
   ============================================================ */

:root{
  --deep:#061530;
  --night:#0B2246;
  --tactic:#123A72;
  --signal:#2C6BE0;
  --orange:#FF6A1A;
  --ember:#FF9245;
  --silver:#C3CFE2;
  --cold:#F5F8FD;
  --paper:#FFFFFF;
  --ink:#050B16;
  --aqua:#37D3C0;

  --rail-w:232px;
  --topbar-h:58px;
  --grid:24px;
  --hairline:rgba(195,207,226,.14);
  --hairline-strong:rgba(195,207,226,.28);

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.22,.7,.3,1);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
}

body{
  margin:0;
  min-height:100vh;
  padding-left:var(--rail-w);
  background-color:var(--deep);
  background-image:
    linear-gradient(rgba(195,207,226,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(195,207,226,.055) 1px,transparent 1px);
  background-size:24px 24px;
  color:var(--silver);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

img,svg,video{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,select,textarea{font:inherit;}

a{color:var(--signal);text-decoration:none;}
a:hover{color:var(--ember);}

p{margin:0 0 1em;}

h1,h2,h3,h4,h5{
  margin:0 0 .5em;
  color:var(--paper);
  font-weight:700;
  line-height:1.15;
  letter-spacing:-.01em;
}
h1{font-weight:900;font-size:clamp(2.4rem,6vw,5rem);line-height:1.05;}
h2{font-size:clamp(1.25rem,2.4vw,1.9rem);}
h3{font-size:clamp(1.05rem,1.6vw,1.3rem);}

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

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

/* ---------- 工具类 ---------- */
.sr-only{
  position:absolute;
  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:fixed;
  top:10px;
  left:calc(var(--rail-w) + 14px);
  z-index:999;
  transform:translateY(-220%);
  padding:10px 18px;
  background:var(--orange);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translateY(0);color:var(--ink);}

.shell{
  width:100%;
  max-width:1320px;
  margin:0 auto;
  padding:0 clamp(20px,4vw,64px);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--aqua);
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:var(--orange);
}

.sec-num{
  display:block;
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(3rem,9vw,6.5rem);
  line-height:.82;
  letter-spacing:-.04em;
  color:transparent;
  -webkit-text-stroke:1px rgba(255,106,26,.85);
}

.rule{
  display:block;
  width:100%;
  height:2px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,var(--orange),rgba(255,106,26,0));
}

.tag{
  display:inline-block;
  padding:3px 9px;
  border:1px solid var(--hairline-strong);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--silver);
  text-transform:uppercase;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 26px;
  border:1px solid transparent;
  font-size:14px;
  font-weight:700;
  letter-spacing:.03em;
  text-decoration:none;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn--primary{
  background:var(--orange);
  color:var(--ink);
}
.btn--primary:hover{
  background:var(--ember);
  color:var(--ink);
  transform:translateY(-1px);
}
.btn--ghost{
  background:transparent;
  border-color:var(--hairline-strong);
  color:var(--silver);
}
.btn--ghost:hover{
  border-color:var(--orange);
  color:var(--orange);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0 0 24px;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:rgba(195,207,226,.6);
}
.breadcrumbs li{display:flex;align-items:center;gap:8px;}
.breadcrumbs li+li::before{content:"/";color:rgba(195,207,226,.35);}
.breadcrumbs a{color:rgba(195,207,226,.75);}
.breadcrumbs a:hover{color:var(--orange);}
.breadcrumbs [aria-current="page"]{color:var(--orange);}

/* ---------- 网格与卡片 ---------- */
.grid{display:grid;gap:var(--grid);}
.grid--2{grid-template-columns:1fr;}
.grid--3{grid-template-columns:1fr;}

.card{
  position:relative;
  padding:24px;
  background:rgba(11,34,70,.62);
  border:1px solid var(--hairline);
  transition:border-color .25s var(--ease),background-color .25s var(--ease);
}
.card:hover{
  border-color:rgba(255,106,26,.55);
  background:rgba(18,58,114,.6);
}

.prose{max-width:72ch;}
.prose p,.prose li{color:var(--silver);}
.prose h2,.prose h3{margin-top:1.8em;color:var(--paper);}
.prose strong{color:var(--paper);}

/* ---------- 图片容器（页面阶段放图占位） ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  background:linear-gradient(135deg,var(--tactic) 0%,var(--deep) 62%,var(--night) 100%);
  border:1px solid var(--hairline);
}
.media-frame--wide{aspect-ratio:21/9;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame>img{
  width:100%;height:100%;
  object-fit:cover;
}
.media-frame::before{
  content:"";
  position:absolute;
  top:-30%;left:-12%;
  width:34%;height:160%;
  background:linear-gradient(90deg,rgba(255,106,26,0),rgba(255,106,26,.34),rgba(255,106,26,0));
  transform:rotate(12deg);
  pointer-events:none;
  z-index:1;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(180deg,rgba(6,21,48,.6),rgba(6,21,48,.2) 52%,rgba(255,106,26,.2)),
    repeating-linear-gradient(90deg,rgba(195,207,226,.09) 0 1px,transparent 1px 24px);
}

/* ============================================================
   头部：桌面侧边轨道 / 移动顶部条 + 右下抽屉
   ============================================================ */
.rail{
  position:fixed;
  top:0;left:0;bottom:0;
  z-index:60;
  display:flex;
  flex-direction:column;
  width:var(--rail-w);
  padding:26px 0 20px;
  background:linear-gradient(180deg,var(--deep) 0%,var(--night) 62%,var(--deep) 100%);
  border-right:1px solid var(--hairline);
}
.rail::after{
  content:"";
  position:absolute;
  top:0;left:0;
  width:3px;height:96px;
  background:linear-gradient(180deg,var(--orange),rgba(255,106,26,0));
}

.rail__brand{
  display:flex;
  align-items:center;
  gap:12px;
  padding:0 22px 22px;
  border-bottom:1px solid var(--hairline);
  text-decoration:none;
}
.rail__brand:hover{text-decoration:none;}

.rail__mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:34px;height:34px;
  background:var(--orange);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:14px;
  font-weight:700;
  clip-path:polygon(0 20%,100% 0,100% 80%,0 100%);
}

.rail__names{
  display:flex;
  flex-direction:column;
  gap:2px;
  min-width:0;
}
.rail__wordmark{
  font-size:17px;
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.01em;
  color:var(--paper);
}
.rail__tagline{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.22em;
  color:var(--signal);
}

.rail__nav{
  flex:1;
  display:flex;
  flex-direction:column;
  padding:18px 0;
  overflow-y:auto;
  scrollbar-width:thin;
}

.rail__list{
  display:flex;
  flex-direction:column;
  margin:0;
  padding:0;
  list-style:none;
}

.rail__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:10px 22px;
  border-left:2px solid transparent;
  color:var(--silver);
  font-size:13.5px;
  line-height:1.5;
  text-decoration:none;
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.rail__link:hover{
  color:var(--paper);
  background-color:rgba(44,107,224,.12);
}
.rail__link[aria-current="page"]{
  color:var(--paper);
  border-left-color:var(--orange);
  background:linear-gradient(90deg,rgba(255,106,26,.18),rgba(255,106,26,0) 78%);
}
.rail__num{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  color:rgba(195,207,226,.5);
}
.rail__link[aria-current="page"] .rail__num{color:var(--orange);}
.rail__label{min-width:0;}

.rail__cta{
  display:block;
  margin:auto 22px 0;
  padding:11px 12px;
  text-align:center;
  background:var(--orange);
  color:var(--ink);
  font-size:13px;
  font-weight:700;
  letter-spacing:.04em;
  text-decoration:none;
  transition:background-color .2s var(--ease),transform .2s var(--ease);
}
.rail__cta:hover{
  background:var(--ember);
  color:var(--ink);
  transform:translateY(-1px);
}

.rail__foot{
  margin-top:12px;
  padding:16px 22px 0;
  border-top:1px solid var(--hairline);
}
.rail__meter{
  position:relative;
  height:3px;
  background:rgba(195,207,226,.16);
  overflow:hidden;
}
.rail__meter-fill{
  position:absolute;
  inset:0 auto 0 0;
  width:0;
  background:linear-gradient(90deg,var(--orange),var(--ember));
  transition:width .15s linear;
}
.rail__readout{
  display:flex;
  justify-content:space-between;
  gap:10px;
  margin:8px 0 0;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.12em;
  color:rgba(195,207,226,.6);
}
.rail__readout-num{color:var(--orange);}

.nav-toggle{
  display:none;
  position:fixed;
  right:18px;bottom:18px;
  z-index:90;
  width:56px;height:56px;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--orange);
  color:var(--ink);
  box-shadow:0 12px 30px rgba(255,106,26,.35);
  transition:background-color .2s var(--ease);
}
.nav-toggle:hover{background:var(--ember);}
.nav-toggle[data-open]{background:var(--paper);}

.nav-toggle__icon{
  position:relative;
  display:block;
  width:20px;height:14px;
}
.nav-toggle__icon i{
  position:absolute;
  left:0;
  width:100%;height:2px;
  background:var(--ink);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.nav-toggle__icon i:nth-child(1){top:0;}
.nav-toggle__icon i:nth-child(2){top:6px;}
.nav-toggle__icon i:nth-child(3){top:12px;}
.nav-toggle[data-open] .nav-toggle__icon i:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[data-open] .nav-toggle__icon i:nth-child(2){opacity:0;}
.nav-toggle[data-open] .nav-toggle__icon i:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:var(--ink);
  border-top:1px solid var(--hairline);
  color:var(--silver);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;
  width:clamp(80px,18vw,200px);
  height:3px;
  background:linear-gradient(90deg,var(--orange),var(--ember));
}

.footer__inner{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
  padding-top:clamp(40px,6vw,64px);
  padding-bottom:26px;
}

.footer__logo{
  margin:0 0 6px;
  font-size:20px;
  font-weight:900;
  letter-spacing:-.01em;
  color:var(--paper);
}
.footer__tagline{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--orange);
}
.footer__desc{
  max-width:34ch;
  margin:0;
  font-size:14px;
  line-height:1.8;
  color:rgba(195,207,226,.78);
}

.footer__nav{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:28px 24px;
}
.footer__col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.16em;
  color:var(--aqua);
}
.footer__list{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin:0;
  padding:0;
  list-style:none;
}
.footer__link{
  font-size:14px;
  color:var(--silver);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer__link:hover{
  color:var(--paper);
  text-decoration:underline;
  text-underline-offset:4px;
}

.footer__meta{
  display:grid;
  gap:8px;
  padding-top:24px;
  border-top:1px solid var(--hairline);
}
.footer__contact{
  margin:0;
  font-size:13.5px;
  line-height:1.9;
  color:rgba(195,207,226,.82);
}
.footer__contact b{
  font-family:var(--font-mono);
  font-weight:400;
  letter-spacing:.02em;
  color:var(--paper);
}
.footer__note{
  margin:0;
  font-size:12.5px;
  line-height:1.8;
  color:rgba(195,207,226,.6);
  max-width:70ch;
}

.footer__base{
  display:flex;
  flex-wrap:wrap;
  gap:8px 24px;
  align-items:center;
  justify-content:space-between;
  margin-top:8px;
  padding-top:18px;
  border-top:1px solid var(--hairline);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.04em;
  color:rgba(195,207,226,.55);
}
.footer__base p{margin:0;}

/* ============================================================
   动效：滚动显现
   ============================================================ */
.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.js [data-reveal].is-in{
  opacity:1;
  transform:none;
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none;}
  .skip-link{transition:none;}
}

/* ============================================================
   响应式
   ============================================================ */
@media (min-width:768px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
}

@media (min-width:900px){
  .footer__inner{
    grid-template-columns:minmax(240px,.9fr) 2.1fr;
    column-gap:64px;
  }
  .footer__meta,
  .footer__base{grid-column:1 / -1;}
}

@media (max-width:1023px){
  body{
    padding-left:0;
    padding-top:var(--topbar-h);
  }

  .skip-link{left:16px;}

  .rail{
    top:0;right:0;bottom:auto;left:0;
    width:100%;
    height:var(--topbar-h);
    flex-direction:row;
    align-items:center;
    gap:14px;
    padding:0 16px;
    border-right:0;
    border-bottom:1px solid var(--hairline);
    background:rgba(6,21,48,.96);
    -webkit-backdrop-filter:blur(8px);
    backdrop-filter:blur(8px);
  }
  .rail::after{height:100%;width:2px;}

  .rail__brand{
    flex:1;
    min-width:0;
    padding:0;
    border-bottom:0;
  }
  .rail__mark{width:28px;height:28px;font-size:12px;}
  .rail__wordmark{font-size:15px;}
  .rail__tagline{display:none;}

  .rail__nav{
    position:fixed;
    top:var(--topbar-h);right:0;bottom:0;
    z-index:70;
    width:min(320px,86vw);
    padding:22px 0 28px;
    background:var(--night);
    border-left:1px solid var(--hairline-strong);
    box-shadow:-30px 0 70px rgba(5,11,22,.75);
    transform:translateX(103%);
    transition:transform .34s var(--ease);
    overflow-y:auto;
  }
  .rail__nav[data-open]{transform:translateX(0);}

  .rail__link{padding:15px 22px;font-size:15px;}
  .rail__num{font-size:12px;}
  .rail__cta{margin:22px 22px 0;padding:13px 12px;font-size:14px;}

  .rail__foot{
    margin:0 0 0 auto;
    padding:0;
    border-top:0;
    display:flex;
    align-items:center;
    gap:10px;
  }
  .rail__meter{width:64px;}
  .rail__readout{display:none;}

  .nav-toggle{display:flex;}
}