/* style.css - 熊猫体育(中国)官网 PANDA SPORTS */
/* 全局重置与变量 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg: #f0f2f5;
    --card-bg: rgba(255,255,255,0.7);
    --text: #1a1a2e;
    --accent: #2d6a4f;
    --accent2: #40916c;
    --shadow: 0 8px 32px rgba(0,0,0,0.1);
    --radius: 20px;
    --glass: blur(20px);
    --gradient: linear-gradient(135deg, #2d6a4f, #40916c);
    --transition: 0.3s ease;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0d1117;
        --card-bg: rgba(30,40,50,0.8);
        --text: #e6edf3;
        --shadow: 0 8px 32px rgba(0,0,0,0.5);
    }
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
    min-height: 100vh;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 头部导航 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--card-bg);
    backdrop-filter: var(--glass);
    -webkit-backdrop-filter: var(--glass);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transition: all var(--transition);
}
header.scrolled { box-shadow: var(--shadow); }
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
}
.logo svg { width: 40px; height: 40px; }
.logo span {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
nav ul { display: flex; list-style: none; gap: 24px; }
nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition);
}
nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width var(--transition);
}
nav a:hover::after, nav a.active::after { width: 100%; }
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--text);
    cursor: pointer;
    padding: 4px;
}
.dark-toggle {
    background: none;
    border: 1px solid var(--text);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text);
    font-size: 1.2rem;
    transition: all var(--transition);
}
.dark-toggle:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* 移动端导航 */
@media (max-width: 768px) {
    .menu-toggle { display: block; }
    nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--card-bg);
        backdrop-filter: var(--glass);
        -webkit-backdrop-filter: var(--glass);
        padding: 20px;
        gap: 16px;
        box-shadow: var(--shadow);
    }
    nav ul.open { display: flex; }
}

/* 面包屑 */
.breadcrumb {
    padding: 16px 0;
    font-size: 0.9rem;
    opacity: 0.7;
    margin-top: 80px;
}
.breadcrumb a { color: var(--text); text-decoration: none; }
.breadcrumb span { margin: 0 6px; }

/* Hero 区域 */
.hero {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    margin-bottom: 40px;
}
.hero-slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    padding: 40px;
    text-align: center;
    color: #fff;
}
.hero-slide.active { opacity: 1; }
.hero-slide h1 {
    font-size: 3rem;
    margin-bottom: 16px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.hero-slide p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 24px;
}
.hero-btn {
    display: inline-block;
    padding: 12px 32px;
    background: #fff;
    color: var(--accent);
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: transform var(--transition);
}
.hero-btn:hover { transform: scale(1.05); }
.hero-dots {
    position: absolute;
    bottom: 20px;
    display: flex;
    gap: 8px;
}
.hero-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: background var(--transition);
}
.hero-dots span.active { background: #fff; }

/* 通用章节 */
section { padding: 80px 0; }
.section-title {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
}
.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient);
    margin: 12px auto 0;
    border-radius: 2px;
}

/* 网格布局 */
.grid-2, .grid-3, .grid-4 {
    display: grid;
    gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* 卡片 */
.card {
    background: var(--card-bg);
    backdrop-filter: var(--glass);
    -webkit-backdrop-filter: var(--glass);
    border-radius: var(--radius);
    padding: 24px;
    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(-6px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}
.card-icon { font-size: 2.5rem; margin-bottom: 12px; }
.card h3 { margin-bottom: 8px; font-size: 1.3rem; }
.card p { opacity: 0.8; }

/* 滚动动画 */
.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);
}

/* 数字统计 */
.numbers {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 24px;
    text-align: center;
    padding: 40px 0;
}
.num-item { flex: 1; min-width: 150px; }
.num-item .num {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.num-item p { margin-top: 8px; font-size: 1rem; }

/* FAQ */
.faq-item {
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding: 16px 0;
    cursor: pointer;
}
.faq-question {
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    transition: transform var(--transition);
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding-top: 0;
}
.faq-item.open .faq-answer {
    max-height: 300px;
    padding-top: 12px;
}

/* 页脚 */
footer {
    background: var(--card-bg);
    backdrop-filter: var(--glass);
    -webkit-backdrop-filter: var(--glass);
    padding: 40px 0;
    margin-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}
.footer-grid h4 { margin-bottom: 12px; }
.footer-grid a {
    display: block;
    color: var(--text);
    opacity: 0.7;
    text-decoration: none;
    margin-bottom: 6px;
    transition: opacity var(--transition);
}
.footer-grid a:hover { opacity: 1; }
.copyright {
    text-align: center;
    padding-top: 24px;
    opacity: 0.6;
    font-size: 0.9rem;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 24px;
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient);
    color: #fff;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    box-shadow: var(--shadow);
    z-index: 999;
}
.back-to-top.show { opacity: 1; visibility: visible; }

/* 搜索栏 */
.search-bar {
    display: flex;
    gap: 8px;
    max-width: 400px;
    margin: 0 auto 40px;
}
.search-bar input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    background: var(--card-bg);
    color: var(--text);
    outline: none;
}
.search-bar button {
    padding: 12px 24px;
    border: none;
    border-radius: 50px;
    background: var(--gradient);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}

/* HowTo 步骤 */
.howto-step {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: flex-start;
}
.howto-step .step-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

/* 文章卡片 */
.article-card { margin-bottom: 24px; }
.article-card .date { font-size: 0.85rem; opacity: 0.6; }
.article-card .read-more {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    display: inline-block;
    margin-top: 8px;
}

/* 合作伙伴logo */
.partner-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}
.partner-logos svg {
    width: 80px;
    height: 40px;
    opacity: 0.6;
    transition: opacity var(--transition);
}
.partner-logos svg:hover { opacity: 1; }

/* 地图占位 */
.map-placeholder {
    width: 100%;
    height: 300px;
    border-radius: var(--radius);
    background: var(--card-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.1);
}

/* 响应式微调 */
@media (max-width: 480px) {
    .hero-slide h1 { font-size: 2rem; }
    .hero-slide p { font-size: 1rem; }
    .hero { min-height: 350px; }
}

/* 额外辅助类 */
.mt-24 { margin-top: 24px; }