/* ===== RESET & BASE ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;background:#F5F5F5;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none}
:focus-visible{outline:3px solid #FF6B35;outline-offset:2px}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important;scroll-behavior:auto!important}}

/* ===== CSS VARIABLES ===== */
:root{
  --primary:#0B3D2E;
  --primary-dark:#07261D;
  --primary-light:#1A6B4D;
  --accent:#FF6B35;
  --accent-light:#FF8C5A;
  --bg-light:#F5F5F5;
  --bg-white:#FFFFFF;
  --text-dark:#1A1A1A;
  --text-medium:#4A4A4A;
  --text-on-primary:#FFFFFF;
  --border:#D0D0D0;
  --font-headings:Impact,'Arial Black',sans-serif;
  --font-body:Georgia,'Times New Roman',serif;
  --container-max:1200px;
  --header-h:72px;
  --shadow-sm:0 2px 8px rgba(0,0,0,0.08);
  --shadow-md:0 4px 20px rgba(0,0,0,0.12);
  --radius:4px;
  --transition:0.25s ease
}

/* ===== SKIP LINK ===== */
.skip-link{
  position:absolute;top:-100px;left:16px;z-index:10000;
  background:#FF6B35;color:#fff;padding:8px 20px;border-radius:0 0 4px 4px;
  font-family:var(--font-headings);font-size:0.9rem;letter-spacing:0.5px;
  transition:top 0.3s ease
}
.skip-link:focus{top:0}

/* ===== CONTAINER ===== */
.container{max-width:var(--container-max);margin:0 auto;padding:0 20px;width:100%}

/* ===== HEADER ===== */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:var(--primary);color:var(--text-on-primary);
  box-shadow:0 4px 0 var(--accent),var(--shadow-md);
  font-family:var(--font-headings);
  min-height:var(--header-h)
}
.header-inner{
  max-width:var(--container-max);margin:0 auto;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between;
  height:var(--header-h);position:relative
}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand-link{display:flex;align-items:baseline;gap:6px;flex-wrap:wrap}
.brand-name{
  font-size:1.75rem;letter-spacing:1px;color:#fff;
  text-transform:uppercase;line-height:1.1
}
.brand-label{
  font-size:0.7rem;color:var(--accent);font-weight:700;
  writing-mode:vertical-rl;transform:rotate(180deg);
  letter-spacing:2px;opacity:0.9;font-family:var(--font-body);
  position:relative;top:-4px;padding:2px 0
}
.brand-tagline{
  width:100%;font-size:0.7rem;color:rgba(255,255,255,0.65);
  font-family:var(--font-body);letter-spacing:0.3px;
  font-weight:400;margin-top:-4px
}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer}
.nav-toggle-line{
  display:block;width:24px;height:2.5px;background:#fff;
  border-radius:2px;transition:var(--transition)
}
.nav-main{display:flex;align-items:center}
.nav-list{display:flex;gap:4px;align-items:center}
.nav-item{margin:0}
.nav-link{
  display:block;padding:8px 14px;font-size:0.85rem;letter-spacing:0.8px;
  color:rgba(255,255,255,0.85);border-radius:var(--radius);
  transition:background var(--transition),color var(--transition);
  position:relative;font-weight:400;text-transform:uppercase
}
.nav-link:hover,.nav-link:focus-visible{color:#fff;background:rgba(255,255,255,0.12)}
.nav-link[aria-current="page"]{
  color:var(--accent);background:rgba(255,107,53,0.15);
  box-shadow:inset 0 -2px 0 var(--accent)
}
@media (max-width:768px){
  :root{--header-h:64px}
  .brand-name{font-size:1.4rem}
  .brand-label{font-size:0.6rem}
  .brand-tagline{font-size:0.6rem}
  .nav-toggle{display:flex}
  .nav-main{
    position:fixed;top:var(--header-h);left:0;right:0;bottom:0;
    background:var(--primary-dark);flex-direction:column;
    align-items:stretch;padding:24px 20px;gap:12px;
    transform:translateX(100%);transition:transform 0.35s ease;
    overflow-y:auto;z-index:999
  }
  .nav-main[data-open]{transform:translateX(0)}
  .nav-list{flex-direction:column;gap:4px;width:100%}
  .nav-link{
    font-size:1rem;padding:14px 16px;text-align:left;
    border-bottom:1px solid rgba(255,255,255,0.08)
  }
  .nav-link[aria-current="page"]{background:rgba(255,107,53,0.2)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
}

/* ===== FOOTER ===== */
.site-footer{
  background:var(--primary-dark);color:rgba(255,255,255,0.85);
  font-family:var(--font-body);font-size:0.9rem;
  border-top:6px solid var(--accent);
  position:relative;margin-top:60px
}
.site-footer::before{
  content:'';position:absolute;top:-12px;left:0;right:0;height:12px;
  background:linear-gradient(135deg,var(--primary-dark) 33%,transparent 33%),
             linear-gradient(225deg,var(--primary-dark) 33%,transparent 33%);
  background-size:20px 20px;opacity:0.3
}
.footer-inner{
  max-width:var(--container-max);margin:0 auto;padding:40px 20px 20px;
  display:grid;grid-template-columns:1fr 1fr;gap:32px 40px
}
.footer-brand{grid-column:1/-1}
.footer-brand-name{
  display:block;font-family:var(--font-headings);
  font-size:1.6rem;color:#fff;letter-spacing:1px;
  text-transform:uppercase
}
.footer-tagline{
  display:block;font-size:0.8rem;color:rgba(255,255,255,0.55);
  margin-top:4px;letter-spacing:0.5px
}
.footer-nav{display:flex;flex-direction:column;gap:8px}
.footer-link{
  color:rgba(255,255,255,0.75);transition:color var(--transition);
  border-left:2px solid transparent;padding-left:12px;
  font-size:0.88rem
}
.footer-link:hover,.footer-link:focus-visible{color:var(--accent);border-left-color:var(--accent)}
.footer-contact{display:flex;flex-direction:column;gap:6px;font-size:0.82rem;color:rgba(255,255,255,0.65)}
.footer-contact-item{display:block}
.footer-legal{
  grid-column:1/-1;display:flex;align-items:center;gap:12px;
  flex-wrap:wrap;padding-top:16px;border-top:1px solid rgba(255,255,255,0.1);
  font-size:0.78rem;color:rgba(255,255,255,0.55)
}
.footer-legal-link{color:rgba(255,255,255,0.65);transition:color var(--transition)}
.footer-legal-link:hover,.footer-legal-link:focus-visible{color:var(--accent)}
.footer-legal-sep{color:rgba(255,255,255,0.2)}
.footer-icp{color:rgba(255,255,255,0.5)}
.footer-bottom{
  grid-column:1/-1;text-align:center;font-size:0.75rem;
  color:rgba(255,255,255,0.4);padding-top:12px;margin-top:8px
}
.footer-copyright{display:inline-block}
@media (max-width:768px){
  .footer-inner{grid-template-columns:1fr;gap:24px;padding:32px 20px 20px}
  .footer-brand-name{font-size:1.3rem}
  .footer-nav{flex-direction:row;flex-wrap:wrap;gap:6px 16px}
  .footer-link{padding-left:0;border-left:none}
  .footer-link:hover,.footer-link:focus-visible{border-left:none}
  .footer-contact{gap:4px}
  .footer-legal{gap:8px;font-size:0.72rem}
}

/* ===== BUTTONS ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 28px;font-family:var(--font-headings);
  font-size:0.9rem;letter-spacing:0.8px;text-transform:uppercase;
  border-radius:var(--radius);transition:var(--transition);
  line-height:1.2;min-height:44px
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover,.btn-primary:focus-visible{background:var(--primary-dark)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover,.btn-accent:focus-visible{background:#e05520}

/* ===== BREADCRUMB ===== */
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:6px 10px;
  font-size:0.82rem;color:var(--text-medium);padding:12px 0;
  font-family:var(--font-body)
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item::after{content:'>';color:var(--border);font-size:0.75rem}
.breadcrumb-item:last-child::after{display:none}
.breadcrumb-link{color:var(--primary);transition:color var(--transition)}
.breadcrumb-link:hover{color:var(--accent)}

/* ===== SECTION TITLE ===== */
.section-title{
  font-family:var(--font-headings);font-size:1.8rem;color:var(--text-dark);
  letter-spacing:0.5px;position:relative;padding-left:18px;
  margin-bottom:24px;line-height:1.2
}
.section-title::before{
  content:'';position:absolute;left:0;top:4px;bottom:4px;
  width:4px;background:var(--accent);border-radius:2px
}
@media (max-width:768px){.section-title{font-size:1.4rem;padding-left:14px}}

/* ===== CARD ===== */
.card{
  background:var(--bg-white);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;
  transition:box-shadow var(--transition),transform var(--transition);
  box-shadow:var(--shadow-sm)
}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.card-body{display:flex;flex-direction:column;gap:12px}

/* ===== DATA NUMBER ===== */
.data-number{
  font-family:var(--font-headings);font-size:3rem;line-height:1;
  color:var(--primary);letter-spacing:-1px
}
.data-number.accent{color:var(--accent)}
@media (max-width:768px){.data-number{font-size:2.2rem}}

/* ===== TAG ===== */
.tag{
  display:inline-block;padding:3px 12px;font-size:0.7rem;
  font-family:var(--font-headings);letter-spacing:0.5px;
  text-transform:uppercase;border-radius:20px;line-height:1.4
}
.tag-live{background:#e74c3c;color:#fff}
.tag-done{background:var(--border);color:var(--text-medium)}
.tag-upcoming{background:var(--accent);color:#fff}

/* ===== DIVIDER ===== */
.divider{
  height:1px;background:var(--border);margin:32px 0;border:none
}
.divider[data-divider="ornament"]{
  height:4px;background:repeating-linear-gradient(90deg,var(--primary) 0,var(--primary) 6px,transparent 6px,transparent 12px);
  margin:28px 0
}

/* ===== IMAGE PLACEHOLDER ===== */
.img-placeholder{
  background:var(--border);position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  color:var(--text-medium);font-size:0.8rem;font-family:var(--font-body);
  min-height:120px
}
.img-placeholder[data-ratio="4-3"]{aspect-ratio:4/3}
.img-placeholder[data-ratio="16-9"]{aspect-ratio:16/9}
.img-placeholder[data-ratio="1-1"]{aspect-ratio:1/1}
.img-placeholder::after{
  content:'📷 赛事图片';opacity:0.4;letter-spacing:0.5px
}

/* ===== BACK TO TOP ===== */
.back-to-top{
  position:fixed;bottom:30px;right:30px;z-index:999;
  width:48px;height:48px;border-radius:50%;
  background:var(--primary);color:#fff;display:flex;
  align-items:center;justify-content:center;
  font-size:1.4rem;box-shadow:var(--shadow-md);
  opacity:0;visibility:hidden;transform:translateY(20px);
  transition:opacity 0.35s ease,transform 0.35s ease,visibility 0.35s ease;
  cursor:pointer;border:2px solid var(--accent)
}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover,.back-to-top:focus-visible{background:var(--primary-dark);transform:translateY(-4px)}
.back-to-top::before{content:'↑';font-weight:700;line-height:1}
@media (prefers-reduced-motion:reduce){.back-to-top{transition:none!important}}

/* ===== HELPER ===== */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.text-center{text-align:center}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mt-32{margin-top:32px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.mb-32{margin-bottom:32px}