/* 米兰体育 - 完整CSS样式文件 */
/* 基础重置与变量 */
:root {
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --accent: #e94560;
    --accent-hover: #d63850;
    --accent-gradient: linear-gradient(135deg, #e94560, #ff6b6b);
    --border: #e0e0e8;
    --shadow: 0 2px 12px rgba(0,0,0,0.06);
    --shadow-hover: 0 8px 24px rgba(233,69,96,0.15);
    --radius: 12px;
    --radius-lg: 16px;
    --transition: 0.3s ease;
    --glass-bg: rgba(255,255,255,0.7);
    --glass-border: rgba(255,255,255,0.3);
    --glass-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --text-primary: #e8e8f0;
    --text-secondary: #a0a0b0;
    --border: #2a2a40;
    --shadow: 0 2px 12px rgba(0,0,0,0.3);
    --shadow-hover: 0 8px 24px rgba(233,69,96,0.25);
    --glass-bg: rgba(26,26,46,0.7);
    --glass-border: rgba(255,255,255,0.1);
    --glass-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    scroll-behavior: smooth;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

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

/* 头部导航 */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition), background var(--transition);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: opacity var(--transition);
}

.logo:hover {
    opacity: 0.85;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 24px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 15px;
    transition: color var(--transition), transform var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition);
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--accent);
    transform: translateY(-1px);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.nav-actions button {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background var(--transition), transform var(--transition), color var(--transition);
}

.nav-actions button:hover {
    background: var(--border);
    transform: scale(1.1);
    color: var(--accent);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    transition: transform var(--transition), opacity var(--transition), background var(--transition);
    border-radius: 2px;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* 搜索覆盖层 */
.search-overlay {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    padding: 16px 20px;
    box-shadow: var(--glass-shadow);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.search-overlay.active {
    display: block;
}

.search-container {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 600px;
    margin: 0 auto;
}

.search-container form {
    display: flex;
    flex: 1;
    gap: 8px;
}

.search-container input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 15px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-container input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(233,69,96,0.15);
}

.search-container button {
    background: var(--accent-gradient);
    border: none;
    color: white;
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.search-container button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(233,69,96,0.3);
}

#searchClose {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    transition: color var(--transition), transform var(--transition);
}

#searchClose:hover {
    color: var(--accent);
    transform: rotate(90deg);
}

/* Hero区域 - 渐变Banner */
#hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 100px 20px;
    max-width: 1200px;
    margin: 0 auto;
    gap: 40px;
    position: relative;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(233,69,96,0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(26,26,46,0.05) 0%, transparent 50%);
    animation: heroGlow 8s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes heroGlow {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(20px, -20px) rotate(5deg); }
}

.hero-content {
    flex: 1;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(233,69,96,0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(233,69,96,0.4);
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:active::after {
    width: 300px;
    height: 300px;
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(233,69,96,0.15);
}

.hero-visual {
    flex: 0 0 400px;
    position: relative;
    z-index: 1;
}

.hero-visual svg {
    width: 100%;
    height: auto;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* 通用区块 */
section {
    padding: 80px 0;
    position: relative;
}

section:nth-child(even) {
    background: var(--bg-secondary);
}

h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent-gradient);
    margin: 12px auto 0;
    border-radius: 3px;
}

/* 关于区域 */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-text p {
    margin-bottom: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* 服务卡片 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.service-card {
    padding: 32px 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    text-align: center;
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: transform var(--transition);
    transform-origin: left;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card svg {
    margin-bottom: 16px;
    transition: transform var(--transition);
}

.service-card:hover svg {
    transform: scale(1.2) rotate(10deg);
}

.service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
}

/* 文章卡片 */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.article-card {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.article-image {
    overflow: hidden;
}

.article-image svg {
    display: block;
    width: 100%;
    height: auto;
    transition: transform 0.5s ease;
}

.article-card:hover .article-image svg {
    transform: scale(1.1);
}

.article-content {
    padding: 20px;
}

.article-content h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.article-content h3 a {
    text-decoration: none;
    color: var(--text-primary);
    transition: color var(--transition);
}

.article-content h3 a:hover {
    color: var(--accent);
}

.article-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.article-content time {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: block;
}

/* FAQ区域 */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 12px;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: var(--glass-shadow);
    transition: box-shadow var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-hover);
}

.faq-item summary {
    padding: 16px 20px;
    cursor: pointer;
    font-weight: 600;
    background: var(--glass-bg);
    transition: background var(--transition), color var(--transition);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.2rem;
    transition: transform var(--transition);
    color: var(--accent);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item summary:hover {
    background: var(--border);
    color: var(--accent);
}

.faq-item p {
    padding: 16px 20px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* HowTo区域 */
#howto {
    background: var(--bg-secondary);
}

.howto-intro {
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-secondary);
}

.howto-steps {
    max-width: 600px;
    margin: 0 auto;
    padding-left: 0;
    list-style: none;
}

.howto-steps li {
    margin-bottom: 16px;
    padding: 16px 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    counter-increment: step-counter;
    position: relative;
    padding-left: 50px;
}

.howto-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    background: var(--accent-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.howto-steps li:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-hover);
}

.howto-steps li strong {
    color: var(--accent);
}

/* 联系区域 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.contact-info {
    padding: 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.contact-info p {
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.contact-info strong {
    color: var(--text-primary);
}

.contact-map svg {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition);
}

.contact-map svg:hover {
    transform: scale(1.02);
}

/* 页脚 */
footer {
    background: #0f0f1a;
    color: #a0a0b0;
    padding: 60px 0 20px;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
}

.footer-brand p {
    margin-top: 12px;
    font-size: 0.95rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.footer-col h4 {
    color: #e8e8f0;
    margin-bottom: 16px;
    font-size: 1rem;
    position: relative;
    display: inline-block;
}

.footer-col h4::after {
    content: '';
    display: block;
    width: 30px;
    height: 2px;
    background: var(--accent);
    margin-top: 6px;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 8px;
}

.footer-col a {
    color: #a0a0b0;
    text-decoration: none;
    transition: color var(--transition), padding-left var(--transition);
}

.footer-col a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-legal {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #2a2a40;
    font-size: 0.9rem;
}

.footer-legal p {
    margin-bottom: 4px;
}

/* 返回顶部按钮 */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(233,69,96,0.3);
    transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
    z-index: 90;
}

#backToTop.visible {
    display: flex;
    animation: fadeInUp 0.3s ease;
}

#backToTop:hover {
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 8px 24px rgba(233,69,96,0.4);
}

/* 滚动动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 暗色模式切换动画 */
[data-theme="dark"] .service-card,
[data-theme="dark"] .article-card,
[data-theme="dark"] .faq-item,
[data-theme="dark"] .stat-item,
[data-theme="dark"] .howto-steps li,
[data-theme="dark"] .contact-info {
    background: var(--glass-bg);
}

/* 响应式布局 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--glass-border);
        padding: 16px 20px;
        gap: 12px;
        box-shadow: var(--glass-shadow);
        animation: slideDown 0.3s ease;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 8px 0;
    }

    .mobile-menu-btn {
        display: flex;
    }

    #hero {
        flex-direction: column;
        text-align: center;
        padding: 60px 20px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-visual {
        flex: 0 0 auto;
        max-width: 300px;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }

    h2 {
        font-size: 1.6rem;
    }

    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .about-stats {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .hero-content h1 {
        font-size: 1.6rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }

    #backToTop {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

/* 打印样式 */
@media print {
    header, #backToTop, .nav-actions {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    section {
        page-break-inside: avoid;
    }
}