/* 乐动·LDSports (中国)体育官网 - 完整样式表 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root { --primary: #1a2a6c; --secondary: #b21f1f; --accent: #fdbb2d; --bg: #f0f2f5; --card-bg: rgba(255,255,255,0.75); --text: #1a1a2e; --glass: rgba(255,255,255,0.2); --shadow: 0 8px 32px rgba(0,0,0,0.1); --radius: 24px; --transition: 0.3s ease; }
body.dark { --bg: #0f0f1a; --card-bg: rgba(30,30,50,0.8); --text: #e0e0f0; --glass: rgba(0,0,0,0.3); --shadow: 0 8px 32px rgba(0,0,0,0.5); }
body { font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; transition: background var(--transition), color var(--transition); scroll-behavior: smooth; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
header { background: linear-gradient(135deg, var(--primary), var(--secondary)); padding: 16px 0; position: sticky; top: 0; z-index: 100; backdrop-filter: blur(8px); box-shadow: 0 4px 20px rgba(0,0,0,0.2); }
.header-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 12px; font-size: 1.8rem; font-weight: 700; color: #fff; text-decoration: none; }
.logo svg { width: 48px; height: 48px; }
nav { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; }
nav a { color: rgba(255,255,255,0.85); text-decoration: none; font-weight: 500; padding: 8px 16px; border-radius: 40px; transition: background var(--transition), color var(--transition); }
nav a:hover, nav a.active { background: rgba(255,255,255,0.2); color: #fff; }
.menu-toggle { display: none; background: none; border: none; color: #fff; font-size: 2rem; cursor: pointer; }
.dark-toggle { background: rgba(255,255,255,0.15); border: none; color: #fff; padding: 8px 16px; border-radius: 40px; cursor: pointer; font-weight: 500; transition: background var(--transition); }
.dark-toggle:hover { background: rgba(255,255,255,0.3); }
.hero { background: linear-gradient(145deg, var(--primary), #4a2c8a, var(--secondary)); color: #fff; padding: 80px 0 100px; text-align: center; position: relative; overflow: hidden; }
.hero::after { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 40%, rgba(253,187,45,0.15), transparent 60%); pointer-events: none; }
.hero h1 { font-size: 3.2rem; font-weight: 800; margin-bottom: 20px; text-shadow: 0 4px 20px rgba(0,0,0,0.3); }
.hero p { font-size: 1.3rem; max-width: 720px; margin: 0 auto 40px; opacity: 0.9; }
.hero-buttons { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.btn { padding: 16px 40px; border-radius: 60px; font-weight: 700; text-decoration: none; display: inline-block; transition: transform var(--transition), box-shadow var(--transition); border: none; cursor: pointer; font-size: 1.1rem; }
.btn-primary { background: var(--accent); color: #1a1a2e; box-shadow: 0 8px 24px rgba(253,187,45,0.3); }
.btn-primary:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(253,187,45,0.5); }
.btn-outline { background: transparent; border: 2px solid rgba(255,255,255,0.6); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,0.1); transform: translateY(-4px); }
.banner-carousel { position: relative; margin-top: -40px; z-index: 2; }
.carousel-track { display: flex; overflow: hidden; border-radius: var(--radius); box-shadow: var(--shadow); background: var(--card-bg); backdrop-filter: blur(12px); }
.carousel-slide { min-width: 100%; transition: transform 0.6s ease; display: flex; align-items: center; justify-content: center; padding: 48px 32px; gap: 40px; flex-wrap: wrap; }
.carousel-slide svg { width: 140px; height: 140px; }
.carousel-text h3 { font-size: 2rem; margin-bottom: 12px; }
.carousel-text p { max-width: 500px; }
.carousel-controls { display: flex; justify-content: center; gap: 16px; margin-top: 20px; }
.carousel-dot { width: 14px; height: 14px; border-radius: 50%; background: rgba(0,0,0,0.2); border: none; cursor: pointer; transition: background var(--transition); }
.carousel-dot.active { background: var(--primary); }
section { padding: 80px 0; }
.section-title { font-size: 2.4rem; font-weight: 700; text-align: center; margin-bottom: 16px; }
.section-subtitle { text-align: center; max-width: 640px; margin: 0 auto 48px; opacity: 0.7; font-size: 1.1rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card { background: var(--card-bg); backdrop-filter: blur(12px); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); transition: transform var(--transition), box-shadow var(--transition); border: 1px solid rgba(255,255,255,0.1); }
.card:hover { transform: translateY(-8px); box-shadow: 0 16px 48px rgba(0,0,0,0.15); }
.card-icon { margin-bottom: 16px; }
.card-icon svg { width: 56px; height: 56px; }
.card h3 { font-size: 1.5rem; margin-bottom: 12px; }
.card p { opacity: 0.8; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-item { padding: 32px; background: var(--card-bg); backdrop-filter: blur(8px); border-radius: var(--radius); box-shadow: var(--shadow); }
.stat-number { font-size: 3rem; font-weight: 800; color: var(--primary); }
.stat-label { margin-top: 8px; font-weight: 500; }
.article-card { background: var(--card-bg); backdrop-filter: blur(8px); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); transition: transform var(--transition); }
.article-card:hover { transform: translateY(-6px); }
.article-card .date { font-size: 0.9rem; opacity: 0.6; margin-bottom: 8px; }
.article-card h3 { font-size: 1.3rem; margin-bottom: 12px; }
.article-card p { opacity: 0.8; margin-bottom: 16px; }
.read-more { color: var(--primary); font-weight: 600; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; }
.faq-item { background: var(--card-bg); backdrop-filter: blur(8px); border-radius: var(--radius); margin-bottom: 16px; padding: 20px 28px; box-shadow: var(--shadow); cursor: pointer; transition: background var(--transition); }
.faq-question { font-weight: 600; font-size: 1.1rem; display: flex; justify-content: space-between; align-items: center; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding-top: 0; }
.faq-item.open .faq-answer { max-height: 400px; padding-top: 16px; }
.faq-toggle { font-size: 1.5rem; transition: transform 0.3s; }
.faq-item.open .faq-toggle { transform: rotate(45deg); }
.howto-steps { counter-reset: step; }
.howto-step { display: flex; gap: 20px; margin-bottom: 24px; align-items: flex-start; background: var(--card-bg); backdrop-filter: blur(8px); padding: 24px; border-radius: var(--radius); box-shadow: var(--shadow); }
.howto-step::before { counter-increment: step; content: counter(step); background: var(--primary); color: #fff; width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; }
.testimonial-card { background: var(--card-bg); backdrop-filter: blur(8px); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); text-align: center; }
.testimonial-card svg { width: 64px; height: 64px; border-radius: 50%; margin-bottom: 16px; }
.testimonial-card .name { font-weight: 600; }
.footer { background: linear-gradient(135deg, var(--primary), #0f1a3a); color: rgba(255,255,255,0.8); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.footer h4 { color: #fff; margin-bottom: 20px; font-size: 1.2rem; }
.footer a { color: rgba(255,255,255,0.7); text-decoration: none; display: block; margin-bottom: 10px; transition: color var(--transition); }
.footer a:hover { color: var(--accent); }
.footer .copyright { text-align: center; margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.9rem; }
.footer .qr-codes { display: flex; gap: 20px; justify-content: center; margin-top: 20px; }
.footer .qr-codes svg { width: 100px; height: 100px; background: #fff; border-radius: 12px; padding: 8px; }
.back-to-top { position: fixed; bottom: 40px; right: 40px; width: 56px; height: 56px; border-radius: 50%; background: var(--primary); color: #fff; border: none; font-size: 1.8rem; cursor: pointer; box-shadow: 0 8px 24px rgba(0,0,0,0.3); transition: transform var(--transition), opacity var(--transition); opacity: 0; transform: translateY(20px); pointer-events: none; z-index: 99; }
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { transform: scale(1.1); }
@media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } .stats-grid { grid-template-columns: 1fr 1fr; } .hero h1 { font-size: 2.2rem; } .menu-toggle { display: block; } nav { display: none; flex-direction: column; width: 100%; margin-top: 16px; } nav.open { display: flex; } .footer-grid { grid-template-columns: 1fr; } .carousel-slide { flex-direction: column; text-align: center; } }
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }
.search-modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(8px); z-index: 200; justify-content: center; align-items: center; }
.search-modal.open { display: flex; }
.search-box { background: var(--card-bg); padding: 40px; border-radius: var(--radius); width: 90%; max-width: 500px; box-shadow: var(--shadow); }
.search-box input { width: 100%; padding: 16px; border: 2px solid rgba(0,0,0,0.1); border-radius: 40px; font-size: 1.1rem; background: rgba(255,255,255,0.5); }
.search-box .close-search { margin-top: 16px; background: var(--primary); color: #fff; border: none; padding: 12px 24px; border-radius: 40px; cursor: pointer; }