:root {
    --primary-green: #28a745;
    --light-green: #d4edda;
    --beige: #f8f9fa;
    --dark-brown: #343a40;
    --gold: #ffd166;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: "Microsoft YaHei", Arial, sans-serif;
    background: var(--beige);
    color: var(--dark-brown);
    line-height: 1.65;
}
.container { width: min(1140px, calc(100% - 32px)); margin: 0 auto; }
.navbar {
    position: sticky; top: 0; z-index: 1000;
    background: linear-gradient(90deg, #1f8f3a, var(--primary-green));
    box-shadow: 0 8px 24px rgba(0,0,0,.12);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 18px; }
.navbar-brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 700; font-size: 20px; }
.navbar-brand img { width: 40px; height: 40px; object-fit: contain; border-radius: 8px; background: #fff; }
.navbar-nav { display: flex; flex-wrap: wrap; gap: 6px 18px; list-style: none; margin: 0; padding: 0; }
.nav-link { color: #fff; text-decoration: none; font-weight: 600; padding: 8px 10px; border-radius: 999px; transition: .25s ease; }
.nav-link:hover, .nav-link.active { background: rgba(255,255,255,.18); color: var(--light-green); }
.hero-banner {
    position: relative; overflow: hidden; min-height: 620px;
    color: white; display: grid; place-items: center; text-align: center;
    background: linear-gradient(rgba(20, 105, 43, .74), rgba(20, 105, 43, .84)), url('../images/runner.png') center/cover no-repeat;
}
.hero-banner::before, .hero-banner::after {
    content: ""; position: absolute; border-radius: 50%; filter: blur(6px); opacity: .45;
    background: rgba(255,255,255,.22); animation: float 7s ease-in-out infinite;
}
.hero-banner::before { width: 160px; height: 160px; left: 8%; top: 16%; }
.hero-banner::after { width: 260px; height: 260px; right: 8%; bottom: 10%; animation-delay: 1.4s; }
.hero-content { position: relative; z-index: 1; animation: fadeUp .9s ease both; }
.display-4 { font-size: clamp(38px, 6vw, 68px); margin: 0 0 14px; letter-spacing: 1px; }
.lead { font-size: clamp(18px, 2.2vw, 24px); margin: 0 0 28px; }
.btn { display: inline-block; border-radius: 999px; padding: 14px 28px; background: #fff; color: var(--primary-green); text-decoration: none; font-weight: 700; box-shadow: 0 12px 28px rgba(0,0,0,.18); transition: .25s ease; }
.btn:hover { transform: translateY(-3px); box-shadow: 0 18px 36px rgba(0,0,0,.22); }
main { padding: 56px 0; }
section { scroll-margin-top: 88px; }
.section-title {
    color: var(--primary-green);
    border-bottom: 3px solid var(--primary-green);
    padding-bottom: 10px;
    margin: 0 0 30px;
    position: relative;
}
.section-title::after { content: ""; position: absolute; bottom: -3px; left: 0; width: 88px; height: 3px; background: var(--gold); }
.row { display: grid; gap: 24px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.center-card { max-width: 820px; margin: 0 auto; }
.card {
    height: 100%; border: none; border-radius: 16px; background: #fff;
    box-shadow: 0 8px 22px rgba(0,0,0,.07); overflow: hidden;
    transition: transform .3s ease, box-shadow .3s ease; animation: fadeUp .8s ease both;
}
.card:hover { transform: translateY(-8px); box-shadow: 0 18px 36px rgba(0,0,0,.14); }
.card-img-top { width: 100%; height: 210px; object-fit: cover; display: block; transition: transform .5s ease; }
.card:hover .card-img-top { transform: scale(1.05); }
.card-body { padding: 22px; }
.card-title { margin: 0 0 10px; font-size: 20px; color: #198754; }
.card-text { margin: 0 0 12px; }
.friend-links {
    background: #2c3e50; padding: 24px 0; color: #ecf0f1; text-align: center;
}
.friend-links a { color: #bdc3c7; margin: 0 10px; text-decoration: none; }
.friend-links a:hover { color: #ecf0f1; text-decoration: underline; }
.footer { background: var(--dark-brown); color: white; padding: 44px 0 22px; }
.footer-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.footer a { color: var(--light-green); text-decoration: none; }
.footer a:hover { color: white; text-decoration: underline; }
.list-unstyled { list-style: none; padding: 0; margin: 0; }
.border-top { border-top: 1px solid rgba(255,255,255,.2); margin-top: 20px; padding-top: 18px; text-align: center; }
.countdown-mask {
    position: fixed; inset: 0; z-index: 9999; display: grid; place-items: center; 
    background: radial-gradient(circle at center, rgba(40,167,69,.95), rgba(20,83,45,.98));
    color: #fff; transition: opacity .5s ease, visibility .5s ease;
}
.countdown-mask.hide { opacity: 0; visibility: hidden; pointer-events: none; }
.countdown-box { text-align: center; animation: pulse .9s ease infinite alternate; }
.countdown-number { font-size: clamp(72px, 12vw, 148px); font-weight: 900; line-height: 1; text-shadow: 0 10px 30px rgba(0,0,0,.25); }
.countdown-text { font-size: 22px; font-weight: 700; margin-top: 12px; }
.reveal { opacity: 0; transform: translateY(26px); transition: .7s ease; }
.reveal.show { opacity: 1; transform: translateY(0); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-22px); } }
@keyframes pulse { from { transform: scale(.98); } to { transform: scale(1.04); } }
@media (max-width: 900px) { .grid-4, .grid-3, .footer-grid { grid-template-columns: repeat(2,1fr); } .nav-inner { align-items: flex-start; flex-direction: column; padding: 12px 0; } }
@media (max-width: 560px) { .grid-4, .grid-3, .footer-grid { grid-template-columns: 1fr; } .hero-banner { min-height: 520px; } .navbar-nav { gap: 4px; } }

.worldcup-countdown{display:flex;gap:15px;justify-content:center;flex-wrap:wrap;margin:20px 0}
.wc-item{background:#f4f4f4;padding:12px 18px;border-radius:10px;text-align:center;min-width:80px}
.wc-item span{display:block;font-size:28px;font-weight:bold}


.wc48-intro { margin-bottom: 24px; }
.wc48-highlight {
    display: flex; align-items: center; justify-content: space-between; gap: 14px;
    margin-top: 16px; padding: 16px 18px; border-radius: 14px;
    background: linear-gradient(90deg, rgba(40,167,69,.12), rgba(255,209,102,.24));
    border: 1px solid rgba(40,167,69,.18);
}
.wc48-highlight span { font-weight: 700; color: #198754; }
.wc48-highlight strong { font-size: clamp(18px, 3vw, 28px); color: #14532d; }
.wc48-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 22px; }
.wc48-card {
    background: #fff; border-radius: 14px; padding: 16px;
    box-shadow: 0 8px 22px rgba(0,0,0,.07); border: 1px solid rgba(40,167,69,.10);
    transition: transform .25s ease, box-shadow .25s ease;
}
.wc48-card:hover { transform: translateY(-5px); box-shadow: 0 16px 30px rgba(0,0,0,.12); }
.wc48-team { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.wc48-team h3 { margin: 0; font-size: 17px; color: #198754; }
.wc48-badge { display: inline-block; padding: 3px 9px; border-radius: 999px; background: var(--light-green); color: #146c43; font-size: 12px; font-weight: 700; }
.wc48-time { margin: 0 0 10px; color: #5f6b62; font-size: 14px; }
.wc48-count { display: grid; grid-template-columns: repeat(4,1fr); gap: 6px; }
.wc48-count span { background: #f8f9fa; border-radius: 8px; padding: 7px 4px; text-align: center; font-weight: 800; color: #14532d; font-size: 14px; }
.wc48-count small { display:block; color:#6c757d; font-size: 11px; font-weight: 500; }
@media (max-width: 1000px) { .wc48-grid { grid-template-columns: repeat(3,1fr); } }
@media (max-width: 720px) { .wc48-grid { grid-template-columns: repeat(2,1fr); } .wc48-highlight { flex-direction: column; align-items: flex-start; } }
@media (max-width: 480px) { .wc48-grid { grid-template-columns: 1fr; } }