:/* 3377体育官方网站 - 完整样式文件 */
:root {
    --primary: #e94560;
    --primary-dark: #c23152;
    --secondary: #0f3460;
    --accent: #16213e;
    --bg: #1a1a2e;
    --bg-light: #f8f9fa;
    --text: #e0e0e0;
    --text-dark: #1a1a2e;
    --glass: rgba(255,255,255,0.08);
    --glass-border: rgba(255,255,255,0.12);
    --shadow: 0 8px 32px rgba(0,0,0,0.3);
    --radius: 20px;
    --radius-sm: 12px;
    --transition: 0.3s ease;
}

[data-theme="light"] {
    --bg: #f0f2f5;
    --bg-light: #ffffff;
    --text: #1a1a2e;
    --text-dark: #0f3460;
    --glass: rgba(255,255,255,0.7);
    --glass-border: rgba(0,0,0,0.08);
    --shadow: 0 8px 32px rgba(0,0,0,0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.glass {
    background: var(--glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 24px;
    transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
    transform: scale(1.04);
    box-shadow: 0 8px 24px rgba(233,69,96,0.4);
}

.section-title {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 12px auto 0;
    border-radius: 4px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.dark-mode-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--text);
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
}

.back-to-top {
    position: fixed;
    bottom: 84px;
    right: 24px;
    z-index: 9998;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary);
    box-shadow: var(--shadow);
    transition: opacity var(--transition);
}

.back-to-top.show {
    display: flex;
}

header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 12px 0;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

nav a {
    color: var(--text);
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 8px;
    transition: background var(--transition);
}

nav a:hover, nav a.active {
    background: var(--glass);
    color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text);
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    nav {
        display: none;
        width: 100%;
        flex-direction: column;
        padding: 16px 0;
        gap: 12px;
    }
    nav.open {
        display: flex;
    }
}

.hero {
    padding: 80px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(233,69,96,0.15), transparent 60%);
    animation: heroGlow 8s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% { transform: translate(0,0); }
    100% { transform: translate(30px,20px); }
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, var(--primary), #ff6b81);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
    position: relative;
    z-index: 1;
    opacity: 0.9;
}

.banner-carousel {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 40px auto;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.banner-slide {
    display: none;
    width: 100%;
    aspect-ratio: 16/9;
    background: var(--accent);
}

.banner-slide.active {
    display: block;
}

.banner-slide svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 16px;
}

.banner-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--glass-border);
    cursor: pointer;
    transition: background var(--transition);
}

.banner-dots span.active {
    background: var(--primary);
}

.banner-arrows {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    transform: translateY(-50%);
    padding: 0 16px;
    pointer-events: none;
}

.banner-arrows button {
    pointer-events: auto;
    background: var(--glass);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    color: var(--text);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    transition: background var(--transition);
}

.banner-arrows button:hover {
    background: var(--primary);
    color: #fff;
}

.section {
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    text-align: center;
}

.stat-item .stat-number {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-item .stat-label {
    margin-top: 8px;
    opacity: 0.8;
}

.news-list {
    display: grid;
    gap: 20px;
}

.news-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px;
    border-radius: var(--radius-sm);
    background: var(--glass);
    transition: background var(--transition);
}

.news-item:hover {
    background: rgba(233,69,96,0.08);
}

.news-item .date {
    min-width: 70px;
    font-weight: 600;
    color: var(--primary);
}

.faq-item {
    border-bottom: 1px solid var(--glass-border);
    padding: 16px 0;
}

.faq-question {
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question::after {
    content: '+';
    font-size: 1.4rem;
    transition: transform var(--transition);
}

.faq-item.open .faq-question::after {
    content: '−';
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding-top: 12px;
}

.howto-steps {
    counter-reset: step;
}

.howto-step {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: flex-start;
}

.howto-step::before {
    counter-increment: step;
    content: counter(step);
    background: var(--primary);
    color: #fff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.partner-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: center;
}

.partner-logos svg {
    width: 120px;
    height: 60px;
    opacity: 0.7;
    transition: opacity var(--transition);
}

.partner-logos svg:hover {
    opacity: 1;
}

.testimonial-card {
    text-align: center;
    padding: 30px;
}

.testimonial-card .avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #fff;
}

.footer {
    background: var(--accent);
    padding: 40px 0 20px;
    margin-top: 40px;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 30px;
}

.footer a {
    display: block;
    margin-bottom: 8px;
    opacity: 0.8;
}

.footer a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid var(--glass-border);
    font-size: 0.9rem;
    opacity: 0.7;
}

.search-box {
    display: flex;
    gap: 8px;
    max-width: 400px;
    margin: 0 auto 40px;
}

.search-box input {
    flex: 1;
    padding: 12px 20px;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    color: var(--text);
    outline: none;
    font-size: 1rem;
}

.search-box input::placeholder {
    color: var(--text);
    opacity: 0.5;
}

.search-box button {
    padding: 12px 24px;
    border-radius: 50px;
    border: none;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    font-weight: 600;
}

.breadcrumb {
    padding: 12px 0;
    font-size: 0.9rem;
    opacity: 0.7;
}

.breadcrumb a {
    color: var(--text);
}

.breadcrumb span {
    margin: 0 6px;
}

@media (max-width: 600px) {
    .hero h1 { font-size: 2rem; }
    .section-title { font-size: 1.6rem; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.schema-hidden {
    display: none;
}