/* 熊猫体育 - 国宝级体验，世界级体育赛事 */
/* style.css - 完整样式文件 */

/* ===== CSS 变量与基础样式 ===== */
:root {
    --bg: #ffffff;
    --text: #1a1a2e;
    --primary: #f5a623;
    --secondary: #e67e22;
    --card-bg: #f9f9f9;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --radius: 16px;
    --transition: 0.3s ease;
    --glass: rgba(255,255,255,0.7);
    --border: #e0e0e0;
    --gradient-primary: linear-gradient(135deg, #f5a623, #e67e22);
    --gradient-bg: linear-gradient(135deg, rgba(245,166,35,0.1), rgba(230,126,34,0.05));
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}

body.dark-mode {
    --bg: #121212;
    --text: #e0e0e0;
    --card-bg: #1e1e2e;
    --shadow: 0 4px 20px rgba(0,0,0,0.4);
    --glass: rgba(30,30,30,0.8);
    --border: #333;
    --gradient-bg: linear-gradient(135deg, rgba(245,166,35,0.05), rgba(230,126,34,0.02));
}

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

body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
    scroll-behavior: smooth;
}

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

a:hover {
    color: var(--secondary);
}

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

/* ===== 布局容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== 标题与文字 ===== */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
}

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

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 10px auto 0;
    border-radius: 2px;
}

h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

p {
    margin-bottom: 15px;
}

/* ===== 按钮 ===== */
.btn-primary, .btn-secondary, .btn-text {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245,166,35,0.4);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: #fff;
}

.btn-text {
    padding: 8px 0;
    color: var(--primary);
    background: none;
    border-bottom: 2px solid transparent;
}

.btn-text:hover {
    border-bottom-color: var(--primary);
}

/* ===== 头部导航 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

.main-nav a {
    color: var(--text);
    font-weight: 500;
    padding: 5px 0;
    position: relative;
    transition: color var(--transition);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.main-nav a.active {
    color: var(--primary);
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.header-actions button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    color: var(--text);
    transition: background var(--transition);
}

.header-actions button:hover {
    background: var(--card-bg);
}

.menu-toggle {
    display: none;
}

/* ===== 搜索栏 ===== */
.search-bar {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
}

.search-bar.open {
    max-height: 60px;
}

.search-bar input {
    width: calc(100% - 80px);
    padding: 15px 20px;
    border: none;
    background: transparent;
    font-size: 1rem;
    color: var(--text);
    outline: none;
}

.search-bar button {
    padding: 15px 20px;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    font-weight: 600;
}

/* ===== 面包屑导航 ===== */
.breadcrumb {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 15px 20px;
    font-size: 0.9rem;
}

.breadcrumb ol {
    list-style: none;
    display: flex;
    gap: 8px;
}

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

.breadcrumb span {
    color: var(--primary);
}

/* ===== Hero Banner 区域 ===== */
.hero-section {
    padding: 120px 20px 60px;
    background: var(--gradient-bg);
}

.hero-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    gap: 40px;
    flex-wrap: wrap;
}

.hero-content {
    flex: 1;
    min-width: 300px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-sub {
    font-size: 1.2rem;
    color: var(--text);
    opacity: 0.8;
    margin-bottom: 30px;
}

.hero-cta {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-visual {
    flex: 1;
    min-width: 300px;
}

/* ===== 品牌统计 ===== */
.brand-content {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
    align-items: center;
}

.brand-content article {
    flex: 2;
    min-width: 300px;
}

.brand-stats {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    min-width: 200px;
}

.stat-item {
    background: var(--card-bg);
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.stat-item:hover {
    transform: translateY(-3px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
}

/* ===== 网格布局通用 ===== */
.culture-grid,
.team-grid,
.product-grid,
.advantages-grid,
.services-grid,
.core-grid,
.solutions-grid,
.case-grid,
.news-grid,
.article-grid,
.contact-grid {
    display: grid;
    gap: 30px;
}

.culture-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.team-grid { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.product-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.advantages-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.services-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.core-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.solutions-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.case-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.news-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.article-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.contact-grid { grid-template-columns: 1fr 1fr; gap: 40px; }

/* ===== 卡片样式 ===== */
.culture-card,
.team-card,
.product-card,
.service-card,
.case-card,
.news-card,
.solution-card,
.testimonial-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--border);
}

.culture-card:hover,
.team-card:hover,
.product-card:hover,
.service-card:hover,
.case-card:hover,
.news-card:hover,
.solution-card:hover,
.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.15);
}

.culture-card svg,
.team-card svg,
.product-card svg,
.service-card svg,
.case-card svg,
.news-card svg {
    margin-bottom: 15px;
    border-radius: var(--radius);
}

/* ===== 优势与核心项 ===== */
.advantage-item,
.core-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
    transition: transform var(--transition);
}

.advantage-item:hover,
.core-item:hover {
    transform: translateX(5px);
}

.advantage-item span,
.core-item span {
    font-weight: 700;
    font-size: 1.2rem;
    display: block;
    margin-bottom: 8px;
}

/* ===== 行业标签 ===== */
.industries-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.industries-list span {
    background: var(--card-bg);
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all var(--transition);
    cursor: default;
}

.industries-list span:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* ===== 评价轮播 ===== */
.testimonial-carousel {
    display: flex;
    gap: 30px;
    overflow-x: auto;
    padding: 20px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.testimonial-card {
    min-width: 300px;
    scroll-snap-align: start;
    flex-shrink: 0;
}

.testimonial-card p {
    font-style: italic;
    font-size: 1.05rem;
}

.testimonial-card span {
    font-weight: 600;
    color: var(--primary);
}

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

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

.faq-question {
    width: 100%;
    text-align: left;
    padding: 18px 0;
    background: none;
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--transition);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-icon {
    font-size: 1.5rem;
    transition: transform var(--transition);
}

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

.faq-answer p {
    padding: 0 0 18px;
}

/* ===== HowTo ===== */
.howto-content {
    max-width: 800px;
    margin: 0 auto;
}

.howto-content h3 {
    margin-top: 30px;
    color: var(--primary);
}

.howto-content ul,
.howto-content ol {
    padding-left: 20px;
    margin-bottom: 15px;
}

/* ===== 联系表单 ===== */
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 15px;
    margin-bottom: 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text);
    font-size: 1rem;
    transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    outline: none;
}

.contact-form button {
    background: var(--primary);
    color: #fff;
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
}

.contact-form button:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

/* ===== 作者卡片 ===== */
.author-card {
    display: flex;
    gap: 20px;
    align-items: center;
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.author-card svg {
    flex-shrink: 0;
}

/* ===== 友情链接 ===== */
.friends-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.friends-links a {
    padding: 8px 20px;
    background: var(--card-bg);
    border-radius: 50px;
    border: 1px solid var(--border);
    transition: all var(--transition);
    color: var(--text);
}

.friends-links a:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ===== 网站地图 ===== */
.sitemap ul {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    list-style: none;
}

.sitemap a {
    color: var(--text);
    font-weight: 500;
    transition: color var(--transition);
}

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

/* ===== 二维码 ===== */
.qrcode .container {
    display: flex;
    gap: 40px;
    justify-content: center;
    flex-wrap: wrap;
}

.qr-item {
    text-align: center;
}

.qr-item svg {
    margin: 0 auto 10px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.qr-item svg:hover {
    transform: scale(1.05);
}

/* ===== 底部 ===== */
footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 40px 20px 20px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 800;
}

.footer-logo span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-bottom: 20px;
}

.footer-nav a {
    color: var(--text);
    font-weight: 500;
    transition: color var(--transition);
}

.footer-nav a:hover {
    color: var(--primary);
}

.footer-info p {
    font-size: 0.85rem;
    opacity: 0.7;
    margin-bottom: 5px;
}

/* ===== 返回顶部 ===== */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: all var(--transition);
    z-index: 999;
}

#backToTop:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(245,166,35,0.4);
}

/* ===== 响应式设计 ===== */
@media (max-width: 992px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    .hero-content h1 { font-size: 2.5rem; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    .hero-content h1 { font-size: 2.2rem; }
    
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
    }
    
    .main-nav.open {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        padding: 20px;
        gap: 15px;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .brand-content {
        flex-direction: column;
    }
    
    .hero-banner {
        flex-direction: column;
    }
    
    .author-card {
        flex-direction: column;
        text-align: center;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .hero-section {
        padding: 100px 20px 40px;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 50px 0;
    }
    
    .hero-section {
        padding: 90px 15px 30px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .product-grid,
    .news-grid,
    .case-grid {
        grid-template-columns: 1fr;
    }
    
    .brand-stats {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-sub {
        font-size: 1rem;
    }
    
    h2 {
        font-size: 1.3rem;
        margin-bottom: 30px;
    }
    
    .testimonial-card {
        min-width: 260px;
        padding: 20px;
    }
    
    .culture-card,
    .team-card,
    .product-card,
    .service-card,
    .case-card,
    .news-card {
        padding: 20px;
    }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary);
}

/* ===== 选中文字样式 ===== */
::selection {
    background: var(--primary);
    color: #fff;
}

/* ===== 暗黑模式下的微调 ===== */
body.dark-mode .hero-section {
    background: var(--gradient-bg);
}

body.dark-mode .stat-item,
body.dark-mode .advantage-item,
body.dark-mode .core-item {
    background: var(--card-bg);
}

body.dark-mode .industries-list span {
    background: var(--card-bg);
}

body.dark-mode .industries-list span:hover {
    background: var(--primary);
}

body.dark-mode .contact-form input,
body.dark-mode .contact-form textarea {
    background: var(--card-bg);
    border-color: var(--border);
}

/* ===== 打印样式 ===== */
@media print {
    header,
    footer,
    #backToTop,
    .search-bar,
    .breadcrumb {
        display: none;
    }
    
    .section {
        opacity: 1;
        transform: none;
        padding: 20px 0;
        page-break-inside: avoid;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}