/* ===== 欧亿体育 - 主样式表 ===== */
/* 主题变量 - 暗色模式 (默认) */
:root {
    --primary: #f5a623;
    --primary-dark: #d4891a;
    --primary-light: #fce4b8;
    --primary-gradient: linear-gradient(135deg, #f5a623, #ffd700);
    --bg: #0f0f1a;
    --bg2: #1a1a2e;
    --bg3: #252540;
    --text: #f0f0f5;
    --text2: #b0b0c0;
    --card-bg: rgba(255,255,255,0.06);
    --glass: rgba(255,255,255,0.08);
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --radius: 16px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --header-height: 70px;
}

/* 明亮模式 */
body.light {
    --bg: #f8f6f2;
    --bg2: #ffffff;
    --bg3: #f0ede8;
    --text: #1a1a2e;
    --text2: #555;
    --card-bg: rgba(0,0,0,0.03);
    --glass: rgba(255,255,255,0.7);
    --shadow: 0 8px 32px rgba(0,0,0,0.08);
}

/* ===== 全局重置与基础 ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
    min-height: 100vh;
}

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

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

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

/* ===== 工具类 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 0.5rem;
    position: relative;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--primary);
    margin: 12px auto 0;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--text2);
    margin-bottom: 3rem;
    font-size: 1.05rem;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #1a1a2e;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(245,166,35,0.3);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245,166,35,0.4);
    color: #1a1a2e;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--primary);
    color: #1a1a2e;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 12px 40px rgba(0,0,0,0.5);
}

.glass {
    background: var(--glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
}

/* ===== 网格布局 ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; }
.grid-5 { display: grid; grid-template-columns: repeat(5,1fr); gap: 1.5rem; }

/* ===== 头部导航 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15,15,26,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: var(--transition);
    height: var(--header-height);
}

body.light header {
    background: rgba(248,246,242,0.9);
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 20px;
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo svg {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

nav {
    display: flex;
    align-items: center;
    gap: 1.8rem;
}

nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    position: relative;
    padding: 4px 0;
    text-decoration: none;
}

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

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    background: rgba(255,255,255,0.1);
}

.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.8rem;
    cursor: pointer;
    padding: 4px;
}

/* ===== 搜索框 ===== */
.search-box {
    display: flex;
    align-items: center;
    background: var(--bg3);
    border-radius: 50px;
    padding: 0 16px;
    max-width: 300px;
    position: relative;
}

.search-box input {
    background: none;
    border: none;
    color: var(--text);
    padding: 10px 8px;
    outline: none;
    width: 100%;
    font-size: 0.9rem;
}

.search-box input::placeholder {
    color: var(--text2);
}

.search-box button {
    background: none;
    border: none;
    color: var(--text2);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 4px;
    transition: var(--transition);
}

.search-box button:hover {
    color: var(--primary);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg2);
    border-radius: 0 0 var(--radius) var(--radius);
    max-height: 400px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: var(--shadow);
}

.search-results a {
    display: block;
    padding: 0.8rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    color: var(--text);
    text-decoration: none;
    transition: var(--transition);
}

.search-results a:hover {
    background: var(--bg3);
    color: var(--primary);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at 30% 50%, rgba(245,166,35,0.12), transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(245,166,35,0.08), transparent 60%),
                var(--bg);
    padding-top: var(--header-height);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23f5a623' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero-slider {
    position: absolute;
    inset: 0;
    display: flex;
}

.hero-slide {
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease;
    position: absolute;
    inset: 0;
    opacity: 0;
}

.hero-slide.active {
    opacity: 1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    padding: 2rem;
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text2);
    margin-bottom: 2rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 5;
}

.hero-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    cursor: pointer;
    transition: var(--transition);
}

.hero-dots span.active {
    background: var(--primary);
    width: 32px;
    border-radius: 6px;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    display: flex;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text2);
    padding: 1rem 0;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text2);
    text-decoration: none;
}

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

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

/* ===== 通用区块 ===== */
section {
    padding: 5rem 0;
}

/* ===== 关于我们 ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

/* ===== 数据统计 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item h3 {
    font-size: 2.8rem;
    color: var(--primary);
    font-weight: 800;
    display: inline;
}

.stat-item span {
    font-size: 2rem;
    color: var(--primary);
    font-weight: 600;
}

.stat-item p {
    color: var(--text2);
    margin-top: 4px;
    font-size: 0.95rem;
}

/* ===== 团队卡片 ===== */
.team-card {
    text-align: center;
}

.team-card img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    border: 3px solid var(--primary);
}

.team-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.team-card p {
    color: var(--text2);
    font-size: 0.9rem;
}

/* ===== 产品卡片 ===== */
.product-card {
    text-align: center;
}

.product-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.product-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.product-card p {
    color: var(--text2);
    font-size: 0.95rem;
}

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

.faq-item {
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: 1rem 0;
    cursor: pointer;
    transition: var(--transition);
}

.faq-item:hover {
    padding-left: 8px;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.05rem;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s;
    color: var(--text2);
    font-size: 0.95rem;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding-top: 0.8rem;
}

.faq-toggle {
    font-size: 1.4rem;
    transition: var(--transition);
    font-weight: 300;
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-item.open .faq-toggle {
    transform: rotate(45deg);
}

/* ===== 评价卡片 ===== */
.testimonial-card {
    text-align: center;
}

.testimonial-card .stars {
    color: var(--primary);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    letter-spacing: 2px;
}

.testimonial-card p {
    font-style: italic;
    color: var(--text2);
    font-size: 0.95rem;
}

.testimonial-card h5 {
    margin-top: 1rem;
    color: var(--text);
    font-size: 0.9rem;
}

/* ===== 新闻卡片 ===== */
.news-card {
    display: flex;
    flex-direction: column;
}

.news-card img {
    border-radius: var(--radius);
    margin-bottom: 1rem;
    height: 200px;
    object-fit: cover;
    width: 100%;
}

.news-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.news-card .date {
    color: var(--text2);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

/* ===== 合作伙伴 ===== */
.partner-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.partner-item {
    padding: 1rem 2rem;
    background: var(--card-bg);
    border-radius: var(--radius);
    font-weight: 600;
    color: var(--text2);
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition);
}

.partner-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* ===== 价值网格 ===== */
.value-grid .card {
    text-align: center;
}

.value-grid .card .icon {
    font-size: 2.2rem;
    margin-bottom: 0.8rem;
    display: block;
}

/* ===== 联系表单 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info p {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
}

#contactForm input,
#contactForm textarea {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255,255,255,0.1);
    background: var(--bg3);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: var(--transition);
}

#contactForm input:focus,
#contactForm textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(245,166,35,0.15);
}

#contactForm textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg2);
    padding: 3rem 0 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
}

.footer h5 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.footer a {
    display: block;
    color: var(--text2);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.06);
    color: var(--text2);
    font-size: 0.85rem;
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #1a1a2e;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(245,166,35,0.3);
    transition: var(--transition);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
}

.back-to-top.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(245,166,35,0.4);
}

/* ===== 滚动动画 ===== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 辅助功能 ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

.hidden {
    display: none !important;
}

/* ===== 响应式设计 ===== */

/* 平板及以下 */
@media (max-width: 1024px) {
    .grid-4,
    .grid-5 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .hero-content h1 {
        font-size: 2.8rem;
    }
}

/* 手机端 */
@media (max-width: 768px) {
    /* 网格调整 */
    .grid-2,
    .grid-3,
    .grid-4,
    .grid-5 {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.7rem;
    }
    
    .section-subtitle {
        font-size: 0.95rem;
        margin-bottom: 2rem;
    }
    
    /* 头部导航 */
    nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg2);
        padding: 1.5rem;
        gap: 1rem;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        box-shadow: var(--shadow);
    }
    
    nav.open {
        display: flex;
    }
    
    .hamburger {
        display: block;
    }
    
    /* Hero */
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-dots {
        bottom: 20px;
    }
    
    /* 关于 */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    /* 统计 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .stat-item h3 {
        font-size: 2.2rem;
    }
    
    /* 联系 */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    /* 页脚 */
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }
    
    /* 区块间距 */
    section {
        padding: 3rem 0;
    }
    
    /* 卡片 */
    .card {
        padding: 1.5rem;
    }
    
    /* 搜索框 */
    .search-box {
        max-width: 200px;
    }
    
    /* 合作伙伴 */
    .partner-grid {
        gap: 1rem;
    }
    
    .partner-item {
        padding: 0.8rem 1.2rem;
        font-size: 0.9rem;
    }
    
    /* 返回顶部 */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
        font-size: 1.2rem;
    }
}

/* 小手机 */
@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    
    .stat-item h3 {
        font-size: 1.8rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .header-inner {
        padding: 0.6rem 12px;
    }
    
    .logo {
        font-size: 1.3rem;
    }
    
    .logo svg {
        width: 28px;
        height: 28px;
    }
    
    .container {
        padding: 0 12px;
    }
}

/* ===== 暗色模式下的特殊样式 ===== */
body:not(.light) .card {
    border-color: rgba(255,255,255,0.08);
}

body:not(.light) .card:hover {
    border-color: var(--primary);
}

body:not(.light) #contactForm input,
body:not(.light) #contactForm textarea {
    border-color: rgba(255,255,255,0.1);
}

/* ===== 动画增强 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.btn:active {
    transform: scale(0.97);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--bg3);
    border-radius: 4px;
}

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

/* ===== 选中文本颜色 ===== */
::selection {
    background: var(--primary);
    color: #1a1a2e;
}

/* ===== 打印样式 ===== */
@media print {
    header,
    .back-to-top,
    .hero-dots,
    .search-box,
    .hamburger,
    .theme-toggle {
        display: none !important;
    }
    
    body {
        background: #fff;
        color: #000;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}